JP2008013162A - Airbag for front passenger seat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an airbag for a front passenger seat which is easily manufactured and positively protects an approaching occupant. <P>SOLUTION: The airbag 15 for the front passenger seat is constituted such that peripheral edges of a base cloth 27 for the airbag provided with a peripheral wall panel part 28 and an occupant side panel part 35 and made into a left/right symmetrical shape are bonded in the flatly deployed state respectively. The peripheral wall panel part 28 is provided with two fan-like edges 34L, 34R such that left and right centers on an upper end side of the occupant side panel part 35 in the airbag 15 in completion of inflation are made as origin parts P1, and that three bonding portions 37, 38L, 38R are radially extended making the origin parts P1 as centers. It is set such that a total of angles θ1, θ2, θ3 making the origin parts P1 as reference of portions of the respective fan-like edges 34L, 34R in the peripheral wall panel part 28 and the portion of the periphery of the origin parts P1 of the occupant side panel part 35, exceeds 360°. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention is folded and housed on the upper surface side of an instrument panel (hereinafter referred to as “instrument panel”) in front of a passenger seat of a vehicle, and protrudes upward when inflating gas flows in, and The present invention relates to an airbag for a passenger seat configured to be deployed and inflated to the rear side of a vehicle so as to close a space between the windshield and the windshield.

Conventionally, as an airbag for a passenger seat, there is a configuration in which an occupant protection portion disposed on the rear side at the time of completion of inflation includes a concave portion that is recessed toward the front side in the vicinity of the left and right centers (for example, Patent Document 1).
JP 2006-103670 A

  However, a conventional passenger airbag has a substantially elliptical outer panel that forms the left and right side walls of the airbag, and has a bilaterally symmetric shape that approximates an open butterfly. Formed by stitching the peripheral edges of the first base cloth of the sheet and the pair of second base cloths in a belt shape curved in a substantially C shape so as to follow the peripheral shape of each outer panel portion. Since the peripheral fabric of the conventional airbag for the passenger seat is greatly curved, it is possible to partially sew planes, but it is difficult to manufacture all by plane stitching. . Therefore, there is room for improvement in terms of reducing the manufacturing steps and costs of the airbag.

  An object of the present invention is to solve the above-mentioned problems, and to provide an airbag for a passenger seat that is easy to manufacture and can accurately protect an approaching passenger.

An airbag for a passenger seat according to the present invention is folded and housed on the upper surface side of an instrument panel in front of a passenger seat of a vehicle, and protrudes upward when an inflating gas flows in, and further includes an upper surface of the instrument panel and an instrument. It is configured to expand and expand to the rear side of the vehicle so as to block between the windshield above the panel,
A gas inflow port for inflating gas is provided near the center in the left-right direction on the lower surface of the front end when the inflation is completed, and it is possible to receive a passenger seated in the passenger seat at the position on the rear side when the inflation is completed And is configured to include an occupant protection unit,
The shape at the time of completion of expansion is a substantially quadrangular pyramid shape with the apex arranged on the front end side, and the left and right side wall portions arranged substantially along the front-rear direction on both the left and right sides, and substantially left and right on both the upper and lower sides An upper side wall portion and a lower side wall portion disposed along the direction, and a rear side wall portion disposed substantially along the left-right direction so as to connect the upper side wall portion and the lower side wall portion on the passenger side. In the passenger airbag of the configuration,
The airbag has a left and right side wall portion, a right side wall portion, an upper side wall portion, and a peripheral wall panel portion that constitutes a lower side wall portion, and an occupant side panel portion that constitutes a rear side wall portion, and is bilaterally symmetric. Each of the peripheral edges of the airbag base fabric is combined in a flatly deployed state,
The starting point is such that at least one of the upper and lower sides of the occupant-side panel portion of the airbag at the time of completion of inflation is located near the center of the left and right, and the three connecting portions extend radially from the starting point. The peripheral wall panel part joined to the passenger side panel part around the part comprises two fan-shaped edges,
The sum of the angles relative to the starting point of each fan-shaped edge part of the peripheral wall panel part constituting the periphery of the starting part of the airbag fabric and the part of the occupant side panel part sandwiched between the connecting parts Is set to exceed 360 °,
The airbag is configured to complete the inflation so as to be recessed with the starting point as the center.

  In the passenger airbag according to the present invention, after the fan-shaped edge portions of the peripheral wall panel portion that are flatly spread are joined to each other, the unbonded portions are pushed open so as to be separated from each other. An airbag can be manufactured by overlapping the peripheral wall panel portion and joining the peripheral edges so that the peripheral edge coincides with the remaining peripheral edge of the fan-shaped edge portion on the occupant side panel portion. And although the passenger seat airbag of the present invention is configured to complete the inflating so as to be recessed with the starting portion as the center, the fan-shaped edge portion and the occupant side panel portion surrounding the starting portion Are set so that the sum of the angles with respect to the starting point portion exceeds 360 °, the fan-shaped edge portion and the occupant side panel portion surrounding the starting point portion are As a convex shape, the joining work of joining the peripheral edges of these parts becomes easy. Therefore, in the airbag for a passenger seat according to the present invention, even when the inflation is completed, even if it is configured to have a concave portion, it is easy to combine the peripheral edges of the base fabrics constituting the airbag. Manufacturing man-hours and costs can be reduced.

  Further, in the passenger seat airbag according to the present invention, the sum of the angles of the fan-shaped edge portion and the occupant side panel portion constituting the periphery of the starting portion exceeds 360 ° with respect to the starting portion. Since this is set, the portion of the airbag fabric that forms the periphery of the starting point portion is configured to form a surplus, and the portion around the starting point portion is smoothly protruded. . Therefore, the part of the starting point part is in a relatively recessed manner with respect to the surrounding part projecting, and the part of the starting point part can be reliably recessed when the expansion is completed.

  In the passenger seat airbag according to the present invention, for example, in the case where the airbag completes inflating so as to be recessed with the origin portion formed on the upper end side as the center, Protruding portions that protrude relatively upward and obliquely rearward are disposed on the left and right sides of the starting portion near the upper end of the occupant protection portion. Therefore, when the occupant interferes with the airbag at the completion of the inflation, the projecting portion that protrudes obliquely rearward and upward on the left and right of the starting portion first interferes with the vicinity of the left and right shoulders of the occupant. The kinetic energy of the occupant moving forward is reduced, and then the shoulders of the occupant are restrained by the left and right projecting parts, and the head of the occupant enters into a part disposed so as to be recessed around the part of the starting point. Therefore, it is restrained so as to suppress the forward movement. Therefore, the occupant's head can be softly received while suppressing the reaction force from the airbag in a state where the kinetic energy is reduced by the left and right protruding portions.

  On the contrary, in the airbag for a passenger seat according to the present invention, when the airbag completes inflating so as to be recessed around the starting point portion formed on the lower end side, the airbag is configured around the starting point portion. A portion of the base fabric becomes an aspect that constitutes a surplus, and the airbag is configured such that the lower end side portion of the occupant protection part at the time of completion of inflation is relatively wider to the left and right than the upper end side portion. The expansion will be completed. Therefore, when the left and right shoulders of the occupant are restrained on the upper end side of the occupant protection part, the left and right arms positioned outside the left and right shoulder parts are wider to the left and right than the upper end side part. It can be received by the part on the lower end side of the part. In addition, when the starting point portion is disposed on the lower end side of the occupant protection portion, a concave portion that is recessed as the center of the starting point portion is formed in the lower end side portion of the occupant protection portion when the inflation is completed. With the child seat placed on the instrument panel side set in the passenger seat, even if the airbag is inflated, the head side of the child seat enters between the recessed portion and the instrument panel, It can suppress that the airbag which completed the inflation interferes with a child seat. Of course, when an interference object other than the child seat is arranged close to the instrument panel, like the head of the child seat, it is possible to suppress the airbag that has completed the inflation from interfering with the interference object. it can.

  Therefore, the passenger seat airbag of the present invention is easy to manufacture and can accurately protect an approaching passenger.

Further, in the passenger seat airbag of the present invention, as a configuration in which the starting point portion is formed on one of the upper end side or the lower end side of the occupant protection portion in the airbag at the time of completion of inflation,
Airbag base fabric
A peripheral wall panel portion that is symmetrical to the left and right sides, with the portion constituting the upper side wall portion or the lower side wall portion as the center on the left and right sides, so that the fan-shaped edge portions are positioned on both left and right edge sides,
A left and right symmetrical occupant side panel portion configured to extend from the rear edge of the peripheral wall panel portion with the left and right centers being aligned with the left and right centers of the peripheral wall panel portion,
It is preferable to constitute as one sheet provided with.

  In the passenger seat airbag having the above-described configuration, an airbag can be manufactured by connecting the peripheral edges of one airbag base fabric. Therefore, an airbag configured by connecting peripheral edges of a plurality of base fabrics. Compared with the bag, the entire coupling distance can be shortened, and the number of manufacturing steps can be further reduced.

Further, in the passenger airbag according to the present invention, the airbag fabric is
It is symmetrical with each other, and is divided into a left and right center of the upper side wall part and a left and right center of the lower side wall part. A peripheral wall panel composed of two sheets,
One occupant-side panel that is symmetrical,
You may comprise as 3 sheets.

  When the passenger airbag is configured as described above, since the airbag base fabric that constitutes the airbag is divided into three pieces, each of the passenger seat airbags is divided into three pieces, The size of the base fabric can be reduced, the yield can be improved, and the manufacturing cost can be further reduced.

  Further, in the passenger seat airbag having the above-described configuration, when a tether for maintaining the recessed shape of the occupant protection portion of the airbag at the completion of the inflation is disposed in the airbag, In this case, the occupant protection part can be surely recessed, which is preferable.

  Specifically, the tether has a single band shape and is arranged so as to connect the vicinity of the left and right center of the occupant protection part and the vicinity of the gas inlet when the inflation is completed. Can be used.

  In addition, as a tether, a belt-like horizontal connecting portion that connects the left side wall portion and the right side wall portion when expansion is completed, and a belt-like shape that connects the vicinity of the left and right centers of the horizontal connecting portion and the vicinity of the left and right centers of the passenger protection portion. You may use what is comprised from the vertical connection part. When such a tether is used, the lateral connecting portion can also regulate the left and right width dimensions of the airbag when the inflation is completed, and can suppress an increase in the volume when the airbag is completed. .

  DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment of the present invention will be described with reference to the drawings. A passenger seat airbag (hereinafter simply referred to as “airbag”) 15 according to a first embodiment includes an instrument panel 1 as shown in FIG. This is used for a top-mount type airbag device M for a passenger seat that is disposed inside the upper surface 2. The passenger seat airbag apparatus M includes a folded airbag 15, an inflator 8 that supplies inflation gas to the airbag 15, a case 6 that stores and holds the airbag 15 and the inflator 8, and an airbag 15. A retainer 11 for attaching to the case 6 and an airbag cover 10 covering the folded airbag 15 are provided.

  In the present specification, the up / down, front / rear, and left / right directions correspond to the up / down, front / rear, and left / right directions of the vehicle in a straight traveling state of the vehicle.

  The airbag cover 10 is formed integrally with the instrument panel 1 made of synthetic resin, and is configured such that when the airbag 15 is deployed and inflated, the front and rear door portions 10a and 10b are pushed by the airbag 15 to open. ing. Further, a connecting wall portion 10 c connected to the case 6 is formed around the door portions 10 a and 10 b of the airbag cover 10.

  The inflator 8 includes a substantially cylindrical main body portion 8 a having a plurality of gas discharge ports 8 b and a flange portion 8 c for attaching the inflator 8 to the case 6.

  The case 6 is formed in a substantially rectangular parallelepiped shape made of a sheet metal having a rectangular opening on the upper end side, a substantially rectangular plate-like bottom wall portion 6a to which the inflator 8 is inserted from below and attached to the outside of the bottom wall portion 6a. And a peripheral wall portion 6b that extends upward from the periphery and engages the connecting wall portion 10c of the airbag cover 10. The case 6 is provided with a bracket (not shown) connected to the vehicle body side at the bottom wall 6a.

  Note that the airbag 15 and the inflator 8 include a plurality of bolts 11 a of an annular retainer 11 disposed in the airbag 15, the airbag 15, the bottom wall portion 6 a of the case 6, and the flange of the inflator 8. The nut 8 is fixed to the case 6 by passing through the portion 8c.

  As shown in FIGS. 2 to 5, the airbag 15 is formed into a substantially quadrangular pyramid shape with the front end as a top when the inflation is completed, and is disposed on the upper and lower sides along the substantially left-right direction. Part 15a, lower side wall part 15b, left side wall part 15c and right side wall part 15d arranged substantially along the front-rear direction on both the left and right sides, and upper side wall part 15a and lower side wall part 15b on the passenger side And a rear side wall portion 15e disposed substantially along the left-right direction. The airbag 15 according to the embodiment includes an occupant protection unit 22 disposed on the rear side that is the occupant MP side when the inflation is completed, and the instrument panel 1 and the windshield 4 on the front side of the occupant protection unit 22 when the inflation is completed. A substantially cylindrical vehicle body side portion 16 that is closed between the front end sides of the vehicle body side portion 16 and that is the front end side of the lower side wall portion 15b when the expansion is completed. A gas inflow port 18 that is opened in a circular shape so as to allow the inflating gas to flow in and that attaches the peripheral edge 17 to the case 6 is disposed in a portion that is near the center. A plurality of attachment holes 19 for attaching the peripheral edge 17 of the gas inlet 18 to the bottom wall portion 6 a of the case 6 by inserting the bolt 11 a of the retainer 11 are formed in the peripheral edge 17 of the gas inlet 18. .

  The occupant protection unit 22 includes a recess 24 formed by recessing the upper end 22a side in the vicinity of the left and right centers on the upper end 22a side when the airbag 15 is completely inflated. Two projecting portions 23L and 23R projecting toward the rear upper side are arranged. In the embodiment, the projecting portions 23L and 23R are disposed so as to project the upper end obliquely rearward, and the recess 24 is relatively a boundary between the upper side wall portion 15a and the rear side wall portion 15e. It is configured so that the vicinity of the portion is greatly recessed obliquely forward and downward.

  The airbag 15 of the first embodiment is configured by sewing the peripheral edges of one airbag base fabric 27 shown in FIG. 6 at the center in the left-right direction of the upper side wall portion 15a when the inflation is completed. The suture site 37 is arranged along the front-rear direction, and the suture site 38 is arranged over the entire periphery of the rear side wall portion 15e excluding the lower edge side. The suture site 37 is arranged so that the rear end side is connected to the vicinity of the center of the suture site 38. That is, in the airbag 15 according to the embodiment, three stitched portions 37 configured by sewing the peripheral edges of the airbag base fabric 27 around the left and right central portions on the upper end 22a side of the occupant protection portion 22. , 38L, 38R are formed to have a starting point P1 extending radially, and the recess 24 is configured to be recessed from the upper side wall 15a to the rear side wall 15e with the starting point P1 as the center. ing.

  Further, in the airbag 15, the portions disposed in the vicinity of the stitched portions 38 </ b> L and 38 </ b> R on the left and right sides of the recess 24 constitute the protruding portions 23 </ b> L and 23 </ b> R. That is, the site in the vicinity of the suture site 38L constitutes the protruding portion 23L, and the site in the vicinity of the suture site 38R constitutes the projecting portion 23R. And the site | parts near the corner part 38a in each stitching | suture part 38L and 38R are separated in the outermost side from the center of the lower edge of the passenger | crew protection part 22 seeing from the back side in protrusion part 23L and 23R, and protrude in the backmost side. The projecting top portions 23 a are configured such that the projecting portions 23 L and 23 R are arranged along the substantially vertical direction so as to project rearward in the middle between the stitched portions 38 L and 38 R and the recessed portion 24. In the case of the embodiment, the projecting portions 23L and 23R are arranged so as to swell into two square shapes when the airbag 15 is completely inflated.

  In the case of the embodiment, the airbag fabric 27 constitutes the rear wall portion 15e and the peripheral wall panel portion 28 constituting the upper wall portion 15a, the lower wall portion 15b, the left wall portion 15c, and the right wall portion 15d. It is set as the structure provided with the passenger | crew side panel part 35, and is made into the left-right symmetric form.

  As shown in FIG. 6, the peripheral wall panel portion 28 is formed in a substantially fan shape such that the vicinity of the center in the left-right direction protrudes rearward, with the lower portion 29 constituting the lower wall portion 15 b as the center of the left and right. On the left side, the left side portion 30 constituting the left side wall portion 15c and the left upper side portion 31 constituting the left side portion of the upper side wall portion 15a (the portion located on the left side of the suture portion 37) are arranged in order. The right side portion 32 constituting the right side wall portion 15d and the upper right side portion 33 constituting the right side portion of the upper side wall portion 15a (the portion placed on the right side of the suture portion 37) are sequentially arranged on the right side. It has been configured. That is, the peripheral wall panel portion 28 is configured so that the upper left side portion 45 and the upper right side portion 47 disposed on the left and right sides of the stitched portion 37 which is the portion constituting the starting point portion P1 are positioned on both left and right edge sides. ing. A gas inflow port 18 is formed in the vicinity of the front end of the peripheral wall panel portion 28 near the left and right centers of the lower portion 29. In addition, the rear left edge 28f and the rear right edge 28g disposed on the left and right sides of the lower portion 29 on the rear side of the peripheral wall panel portion 28 have outer shapes that are described later in the passenger side panel portion 35, respectively. It is configured so as to coincide with the peripheral edge 35a and the right peripheral edge 35c, and has a convex shape that protrudes toward the occupant side panel 35. Specifically, in the case of the embodiment, the rear left edge 28f and the rear right edge 28g are respectively disposed on the rear side of the left edge 28d and the right edge 28e formed in a straight line shape in the peripheral wall panel portion 28. Then, the front portion is curved in a substantially ¼ arc shape so as to continue from the left edge 28d and the right edge 28e, and the rear portion away from the lower portion 29 is set to the front side. It is made into the shape which makes it project in the passenger | crew side panel part 35 side as a linear form inclined so that the inner side near the lower site | part 29 may be located in a rear side. Further, the peripheral wall panel portion 28 is configured to be substantially bilaterally symmetrical with a line along the front-rear direction passing through the center of the gas inlet 18 as a center line C1. In the embodiment, the left edge 28d and the rear left edge 28f of the peripheral wall panel portion 28 form a fan-shaped edge portion 34L, and a right edge 28e and a rear right edge 28g described later of the peripheral wall panel portion 28 are fan-shaped edge portions 34R. The peripheral wall panel portion 28 includes two fan-shaped edge portions 34L and 34R on both left and right edge sides.

  The occupant side panel portion 35 has a substantially rectangular shape, and is symmetric with respect to the lower portion 29 so that the center in the left-right direction is arranged to coincide with the center line C1 of the peripheral wall panel portion 28. It is formed to extend rearward from the rear edge side. And the occupant side panel part 35 makes the left-right periphery 35a arrange | positioned on the left side of the origin part P1, and the right-side periphery 35c arrange | positioned on the right side of the origin part P1 with the left-right center in an upper end side as the origin part P1. Each of the peripheral wall panel portions 28 is configured to have a shape along the rear left edge 28f and the rear right edge 28g. In the case of the embodiment, the starting point portion P1 is disposed on the center line C1, and the airbag base fabric 27 of the embodiment has a line along the front-rear direction passing through the center of the gas inlet 18 as the center line. C1 is configured to be substantially symmetrical.

  Further, in the airbag base fabric 27, as shown in FIG. 6, the intersection of the left edge 28d and the rear left edge 28f at the fan-shaped edge 34L corresponding to the starting point P1 of the occupant side panel 35. And the cross | intersection site | part of the right edge 28e and the rear right edge 28g in the site | part of the fan-shaped edge part 34R comprises the starting point part P1. In the airbag fabric 27 according to the embodiment, the total of the angles that constitute the periphery of the starting portion P1 and are sandwiched between the stitched portions 37, 38L, and 38R is 360 ° with respect to the starting portion P1. It is configured to exceed. Specifically, in the airbag fabric 27 of the embodiment, the intersection angle θ1 between the left edge 28d and the rear left edge 28f centered on the starting point P1 in the peripheral wall panel portion 28 (the fan-shaped edge portion in the peripheral wall panel portion 28). 34L, the angle of the portion 28j surrounded by the stitched portions 37 and 38L), and the intersection angle θ2 (peripheral wall panel) of the right edge 28e and the rear right edge 28g centering on the starting point P1 in the peripheral wall panel portion 28. A portion of the fan-shaped edge 34R in the portion 28, that is, the angle of the portion 28k surrounded by the stitched portions 37 and 38R, which coincides with the intersection angle θ2, and the left side centering on the starting point portion P1 in the occupant side panel portion 35 The sum of the intersection angle θ3 (the angle of the portion 35e surrounded by the stitched portions 38L and 38R in the occupant side panel portion 35) between the peripheral edge 35a and the right peripheral edge 35c exceeds 360 °. Is set. If the sum of these crossing angles θ1, θ2, θ3 exceeds 360 °, the portions 28j, 28k, 35e of the airbag base fabric 27 are 360 around the vicinity of the starting point P1 when the airbag 15 is completely inflated. The surplus portion is generated by the portion having an angle of more than °, and this surplus portion causes the projecting portions 23L and 23R to largely project, and conversely, the concave portion 24 is enlarged with the starting portion P1 as the center. It becomes an aspect which makes it dent. Specifically, the sum of the crossing angles θ1, θ2, and θ3 is preferably 360 ° or more and less than 540 °.

  Specifically, in the airbag base fabric 27, as shown in FIG. 6, a portion surrounded by the left peripheral edge 35a in the occupant side panel portion 35 (the ends of the left peripheral edge 35a and the left peripheral edge 35a are connected to each other). A portion surrounded by an ellipse L1) 35b and a portion surrounded by the rear left edge 28f of the peripheral wall panel portion 28 (a line L2 connecting the ends of the rear left edge 28f and the rear left edge 28f to each other) 28h becomes a part constituting the protruding portion 23L when the airbag 15 is completely inflated. Similarly, a portion surrounded by the right peripheral edge 35c in the occupant side panel portion 35 (a portion surrounded by a line L3 connecting the right peripheral edge 35c and the end portion of the right peripheral edge 35c) 35d and a rear portion in the peripheral wall panel portion 28. The portion surrounded by the right edge 28g (the portion surrounded by the line L4 connecting the ends of the rear right edge 28g and the rear right edge 28g) 28i is a protruding portion when the inflation of the airbag 15 is completed. It becomes a part which comprises 23R. When the protrusions 23L and 23R are inflated into two squares when the airbag 15 is inflated, in the airbag 15 of the embodiment, the lower edge and the line L1 and the lower edge of the rear side wall 15e are manufactured. As shown in FIGS. 7A and 7B from the left and right sides of the substantially triangular pyramid-shaped portion, the portion surrounded by L3 has a bottom surface and a starting point P1 as the apex. A part 35b surrounded by the line L1 and the left peripheral edge 35a in the panel part 35, a part 28h surrounded by the rear left edge 28f and the line L2 in the peripheral wall panel part 28, a line L3 and the right peripheral part in the occupant side panel part 35 A portion 35d surrounded by 35c and a portion 28i surrounded by the rear right edge 28g and the line L4 in the peripheral wall panel portion 28 are projected as an excess peripheral wall portion. Then, as shown in FIG. 7C, when the airbag 15 is inflated, the excess peripheral wall portion separates the lines L1, L2 and the lines L3, L4 from each other with the suture portions 38L, 38R as the centers. As a result, the protrusions 23L and 23R are configured to expand greatly.

Next, manufacture of the airbag 15 of 1st Embodiment is described. The airbag 15 of the embodiment is configured by folding back a flat airbag base fabric 27 along folding lines CL1, CL2, CL3, and CL4 (see A in FIG. 8) and sewing the periphery in a plane. The Note that the folding lines CL1 and CL2 have the outer shape (area) of the portion of the occupant side panel portion 35 surrounded by the center line C1 and the folding line CL2 and the folding line CL1 so that the peripheral edges coincide with each other at the time of plane sewing. , CL2 are arranged so that the outer shapes (areas) of the portions of the peripheral wall panel portion 28 surrounded by CL2 are matched. In the case of the embodiment, as shown in FIG. 8, the intersection angle between the fold line CL1 and the left edge 28d in the peripheral wall panel portion 28 (intersection angle between the fold line CL3 and the right edge 28e in the peripheral wall panel portion 28) β1 The intersection angle between the fold line CL1 and the rear left edge 28f of the peripheral wall panel portion 28 (intersection angle of the fold line CL3 and the rear right edge 28g of the peripheral wall panel portion 28) α1, the center line C1 and the occupant side panel portion 35 The intersection angle with the left peripheral edge 35a (intersection angle between the center line C1 and the right peripheral edge 35c of the occupant side panel portion 35) α2 (coincidence with the intersection angle α1) is set to 90 ° or less, respectively (see FIG. 8 A). The sum of the intersection angle α1 and the intersection angle β1 is a value that coincides with the intersection angles θ1 and θ2 in the airbag fabric 27 described above. Further, the sum of the intersection angle α2 and the intersection angle α2 is a value that matches the intersection angle θ3 in the airbag fabric 27 described above. The intersection angles α1 and α2 should be set to 90 ° or less, respectively. Is preferred. When the crossing angles α1 and α2 exceed 90 °, the sutured portions 38L and 38R described later are arranged so as to largely overlap in the vicinity of the left and right centers (near the center line C1) of the airbag 15, and the volume of the airbag 15 is increased. This is because it becomes difficult to perform automatic sewing because it becomes a mode of entering each other so as to narrow. Further, when the crossing angle β1 also exceeds 90 °, the sutured portion 37 is arranged so as to largely overlap the sutured portions 38L and 38R in the vicinity of the folding lines CL1 and CL2, so that the volume of the airbag 15 is reduced. It is preferable that the angle is set to 90 ° or less because automatic sewing is difficult due to the intrusion. However, since the airbag for the passenger seat is inflated so as to be supported by the windshield located on the front side, the crossing angle β1 is set to exceed 90 ° depending on the design of the vehicle to be mounted. May be. However, even when the intersection angle β1 is set to exceed 90 °, it is desirable to set the sum of the intersection angle α1 and the intersection angle β1 to 180 ° or less. This is because if the sum of the intersection angle α1 and the intersection angle β1 exceeds 180 °, automatic sewing becomes more difficult.

  Specifically, the airbag 15 is manufactured as follows. First, as shown in FIGS. 8A and 8B, the airbag base cloth 27 that is flatly deployed is folded back at the center line C1 so that the peripheral edges overlap each other, and the fan-shaped edges 34L and 34R in the peripheral wall panel 28 are provided. The left edge 28d and the right edge 28e, which are a part of each, are sewn using a suture thread to form a suture portion 37. Thereafter, as shown in FIG. 8C, the peripheral portion of the peripheral wall panel portion 28 is adjusted so that the stitched portion 37 is aligned with the center line C1, and the front center edge 28a is aligned with the front left edge 28b and the front right edge 28c. The front center edge 28a, the front left edge 28b, and the front right edge 28c are sewn using a suture to form a stitched portion 39, and the peripheral wall panel is folded at the left portion 30 and the right portion 32. The portion 28 has a substantially cylindrical shape with the front end side closed. Next, as shown in FIGS. 8D and 8E, the rear left edge 28f and the rear right edge 28g, which are the remaining portions of the fan-shaped edge portions 34L and 34R in the peripheral wall panel portion 2, are replaced with the left and right peripheral edges 35a and 35a. The rear left edge 28f and the rear right edge 28g are spread apart from each other so as to coincide with 35c, and creases are formed at the fold lines CL1, CL2, CL3, CL4, and the rear side portion of the peripheral wall panel portion 28 28h and 28i are placed on the occupant side panel portion 35, and the rear left edge 28f of the peripheral wall panel portion 28 is sewn to the left peripheral edge 35a of the occupant side panel portion 35 using a suture thread to form a stitched portion 38L. To do. Similarly, as shown to F of FIG. 8, the rear right edge 28g of the surrounding wall panel part 28 is sewn on the right side periphery 35c of the passenger | crew side panel part 35, and the sewing part 38R is formed. Thereafter, the airbag 15 can be manufactured by reversing it using the gas inlet 18 so that the seam allowance of the edge portion is not exposed to the outside. In the embodiment, the airbag inversion operation is performed using the gas inlet 18. However, the front center edge 28a, the front left edge 28b, and the front right edge 28c are not stitched, and this unstitched state is performed. The airbag may be inverted from the site, and the suture site 39 may be formed after the inversion.

  And in the airbag 15 of 1st Embodiment, while the airbag base fabric 27 which comprises the airbag 15 is made into a left-right symmetric form, the left side periphery 35a and the right side periphery 35c of the passenger | crew side panel part 35 are respectively, Since the peripheral wall panel portion 28 is shaped so as to follow the rear left edge 28f and the rear right edge 28g, it can be stitched in a plane with the edges overlapped and flattened during sewing operation. Work becomes easy.

  Thereafter, the airbag 11 is folded in a state in which the bolt 11a is protruded from each mounting hole 19 and the retainer 11 is disposed therein. Then, it is wrapped with a breakable wrapping sheet 13 (see FIG. 1). Then, the folded airbag 15 is placed on the bottom wall 6 a of the case 6 so that each bolt 11 a protrudes from the bottom wall 6 a of the case 6. Next, the main body portion 8 a of the inflator 8 is inserted into the case 6 from below the bottom wall portion 6 a, and each bolt 11 a protruding downward from the bottom wall portion 6 a is inserted into the flange portion 8 c of the inflator 8. Thereafter, when the nut 12 is fastened to each bolt 11 a protruding from the flange portion 8 c of the inflator 8, the folded airbag 15 and the inflator 8 can be attached to the bottom wall portion 6 a of the case 6.

  Then, the peripheral wall portion 6b of the case 6 is locked to the connecting wall portion 10c of the airbag cover 10 in the instrument panel 1 mounted on the vehicle, and a predetermined bracket (not shown) of the case 6 is fixed to the body side portion of the vehicle. Then, the passenger seat airbag device M can be mounted on the vehicle.

  If the inflation gas is discharged from each gas discharge port 8b of the inflator 8 at the time of a frontal collision of the vehicle after mounting the airbag device M for the passenger seat on the vehicle, the airbag 15 is inflated and the wrapping sheet 13 is removed. At the same time, the doors 10a and 10b of the airbag cover 10 are pushed and opened as shown in the two-dot chain line of FIG. 1 and FIG. The airbag 15 protrudes upward from an opening formed by opening the door portions 10a and 10b of the airbag cover 10, and between the upper surface 2 of the instrument panel 1 and the windshield 4 above the instrument panel 1. As shown in FIG. 1, the vehicle expands and inflates toward the rear side of the vehicle to complete the expansion as shown in the two-dot chain line of FIG. 1 and FIGS.

  In the airbag 15 according to the first embodiment, the left edge 28d and the right edge 28e constituting the fan-shaped edge portions 34L and 34R of the peripheral wall panel portion 28 of the airbag base fabric 27 that are flatly deployed are stitched together to sew the stitched portion 37. , The rear left edge 28f and the rear right edge 28g, which are unstitched portions, are pushed open so as to be separated from each other, and the left side edge 35a and the right side edge 35c are formed on the occupant side panel 35 in a flatly deployed state. The peripheral wall panel portion 28 is overlapped so as to coincide with the rear left edge 28f and the rear right edge 28g which are the remaining portions of the fan-shaped edges 34L and 34R, and the left peripheral edge 35a, the rear left edge 28f, the right peripheral edge 35c, and the rear right edge The airbag 15 can be manufactured by forming the stitched portions 38L and 38R by stitching 28g together. And although the airbag 15 of 1st Embodiment is the structure which completes expansion | swelling so that it may be dented centering | focusing on the origin part P1, the passenger | crew which comprises the site | part of the fan-shaped edge parts 34L and 34R and the circumference | surroundings of the origin part P1 Since the part 35e of the side panel part 35 is set so that the sum of the angles with respect to the starting point part P1 exceeds 360 °, the parts of the fan-shaped edge parts 34L and 34R and the starting part P1 The part 35e of the occupant side panel portion 35 constituting the periphery has a convex outer peripheral edge, and the sewing operation for sewing the peripheral edges of these parts is facilitated. Therefore, in the airbag 15 according to the first embodiment, even when the inflation is completed, even if the airbag 24 is configured to have the recess 24, a sewing operation for sewing the peripheral edges of the airbag base fabric 27 constituting the airbag 15 is easy. Therefore, the manufacturing man-hour and cost of the airbag 15 can be reduced.

  Moreover, in the airbag 15 of 1st Embodiment, the site | parts 28j, 28k, and 35e of the airbag base fabric 27 which comprise the circumference | surroundings of the origin part P1 become an aspect which comprises surplus, and this origin part P1 The projecting portions 23L and 23R are configured by smoothly projecting the surrounding portions. For this reason, the part of the starting point part P1 is in a relatively concave shape while the parts located on the left and right sides of the surroundings protrude, and the part of the starting point part P1 is surely recessed when the expansion is completed. Can do.

  And in the airbag 15 of 1st Embodiment, it is the structure which the airbag 15 completes expansion | swelling so that the passenger | crew protection part 22 may dent centering on the site | part of the starting part P1 formed in the upper end 22a side. From the left and right sides of the starting point P1 in the vicinity of the upper end 22a of the occupant protection part 22 in the airbag 15 when the inflation is completed, the protrusions 23L and 23R that protrude relatively obliquely rearward and upward are disposed. The Rukoto. Therefore, when the occupant MP interferes with the airbag 15 when the inflation is completed, the left and right projecting portions 23L and 23R projecting obliquely rearward and upward at the left and right of the starting point portion P1 The occupant MP interferes with the vicinity of the left and right shoulders MSL, MSR of the occupant MP, so that the kinetic energy of the occupant MP moving forward is reduced, and then the occupant is restrained by the protrusions 23L, 23R. The head portion MH of the MP is restrained so as to suppress the movement toward the front side while entering the portion of the concave portion 24 that is recessed with the portion of the starting point portion P1 as the center. Therefore, in the airbag 15 of the first embodiment, the kinetic energy is reduced by the left and right protrusions 23L and 23R, and the head MH of the occupant MP is softened while suppressing the reaction force from the airbag 15. I can take it.

  Therefore, the airbag 15 of the first embodiment is easy to manufacture and can accurately protect the approaching occupant MP.

  In the airbag 15 of the first embodiment, since the airbag 15 is manufactured by stitching the peripheral edges of one airbag base fabric 27, the peripheral edges of a plurality of base fabrics are stitched together. Compared to an airbag configured as described above, the overall stitching distance can be shortened, and the number of manufacturing steps can be further reduced.

  In the airbag 15 of the first embodiment, the shapes of the rear left edge 28f and the rear right edge 28g in the peripheral wall panel portion 28 and the shapes of the left peripheral edge 35a and the right peripheral edge 35c in the passenger side panel portion 35 are changed. In this case, the protruding amounts of the protruding portions 23L and 23R can be easily changed. Specifically, as shown by a two-dot chain line in FIG. 6, if the rear left edge 28f and the left peripheral edge 35a are set so as to reduce the amount of protrusion from the lines L1 and L2, respectively, the airbag at the completion of the inflation is set. 15, the protrusion amount of the protrusion 23L can be set small, and conversely, as shown by the one-dot chain line in FIG. 6, the rear left edge 28f and the left peripheral edge 35a are respectively increased in protrusion amounts from the lines L1 and L2. If it sets so, the protrusion amount of the protrusion part 23L in the airbag 15 at the time of completion of inflation can be set large.

  Moreover, you may use the thing comprised from the base fabric 41 for airbags of the shape shown in FIG. 11 as the airbag 40 of 2nd Embodiment. Since the airbag 40 is different in the outer shape of the airbag base fabric 41, as shown in FIGS. 13 and 14, the airbag 40 is the same as that of the airbag 15 of the first embodiment except that the outer shape at the time of inflation is slightly different. The same components as those of the airbag 15 are denoted by the same reference numerals with “A” added to the end of the members constituting the airbag 15 of the first embodiment, and description thereof is omitted. To do. The airbag 40 of the second embodiment is also provided with recesses 24A configured by recessing the upper end 22a side in the vicinity of the left and right centers on the upper end 22a side of the occupant protection portion 22A when inflation is completed, The two projecting portions 23AL and 23AR projecting relatively obliquely rearward and upward are provided. And also in the airbag 40 of 2nd Embodiment, the periphery of the base fabric 41 for airbags is mutually sewn on the site | part of the center of the right-and-left side of the upper end 22a side of passenger | crew protection part 22A. A starting point P2 in which the stitched portions 37A, 38AL, and 38AR extend radially is formed, and the recessed part 24A is configured to dent the occupant protecting part 22A with the starting point P2 as the center.

  The airbag base fabric 41 has a substantially rectangular shape in which the peripheral wall panel portion 42 extends in the left-right direction in the longitudinal direction. It has a substantially “convex” shape formed by extending. The airbag base fabric 41 is configured in the same manner as the airbag base fabric 27 described above, and the peripheral wall panel portion 42 is located on the left side with the lower portion 43 constituting the lower wall portion 15b as the center of the left and right. The left side portion 44 constituting the left side wall portion 15c and the left upper side portion 45 constituting the left side portion of the upper side wall portion 15a (the portion arranged on the left side of the suture portion 37A) are sequentially arranged on the side, A configuration in which a right side portion 46 constituting the right side wall portion 15d and an upper right side portion 47 constituting the right side portion of the upper side wall portion 15a (a portion placed on the right side of the suture portion 37A) are sequentially arranged on the side. It is said that. A gas inflow port 18A is formed in the vicinity of the left and right center of the lower part 43, and the occupant side panel portion 49 is formed to extend rearward from the rear edge side of the lower part 43. Yes.

  Also in the airbag base fabric 41, the rear left edge 42d and the rear right edge 42e disposed on the left and right sides of the lower portion 43 on the rear side of the peripheral wall panel portion 42 have outer shapes, respectively, The side panel portion 49 is configured to coincide with the left side peripheral edge 49a and the right side peripheral edge 49c, and has a convex shape that protrudes toward the passenger side panel unit 49 side. The rear left edge 42d and the rear right edge 42e are respectively arranged on the rear side of the left edge 42b and the right edge 42c formed linearly in the peripheral wall panel portion 42. 42b and the right edge 42c are arranged in a straight line along the front-rear direction, and the rear part is a straight line along the left-right direction, and the intersection part of the front part and the rear part is substantially It is made into the shape which it connects with the curve curved in 1/4 arc shape, and protrudes in the passenger | crew side panel part 49 side. Specifically, as shown in FIG. 11, the rear left edge 42d and the rear right edge 42e are configured by edges positioned on the rear side of lines L6 and L8 described later. In the second embodiment, the left edge 42b and the rear left edge 42d of the peripheral wall panel portion 42 form a fan-shaped edge 48L, and the right edge 42c and the rear right edge 42e of the peripheral wall panel portion 42 are fan-shaped edges. 48R is constituted.

  The airbag base fabric 41 is also configured to be substantially bilaterally symmetrical with a line along the front-rear direction passing through the center of the gas inlet 18A as a center line C2. And in the airbag base fabric 41, as shown in FIG. 11, the intersection of the left peripheral edge 49a and the right peripheral edge 49c, which is the center of the left and right sides of the occupant side panel 49, constitutes the starting point P2. The intersection of the left edge 42b and the rear left edge 42d at the portion of the fan-shaped edge 48L of the peripheral wall panel portion 42 and the intersection of the right edge 42c and the rear right edge 42e of the portion of the fan-shaped edge 48R are the starting points. Part P2 will be configured. Also in the airbag base fabric 41, the sum of the angles that constitute the periphery of the starting point portion P2 and are surrounded by the stitched portions 37A, 38AL, 38AR exceeds 360 ° with respect to the starting point portion P2. It is configured. Specifically, in the airbag base fabric 41, the intersection angle θ4 between the left edge 42b and the rear left edge 42d, which is the part of the fan-shaped edge 48L in the peripheral wall panel 42 and centered on the starting point P2, and the peripheral wall An intersection angle θ5 between the right edge 42c and the rear right edge 42e, which is a part of the fan-shaped edge 48R in the panel portion 42 and centered on the starting point P2, and the left peripheral edge 49a and the right peripheral edge 49c in the passenger side panel portion 49 The sum of the intersection angle θ6 and 360 ° is set.

  In the airbag base fabric 41, specifically, a region surrounded by the left peripheral edge 49a of the occupant side panel portion 49 (enclosed by the line L5 connecting the end portions of the left peripheral edge 49a and the left peripheral edge 49a). 49b and a portion surrounded by the rear left edge 42d in the peripheral wall panel portion 42 (a portion surrounded by a line L6 connecting the ends of the rear left edge 42d and the rear left edge 42d) 42f, However, when the inflation of the airbag 40 is completed, it becomes a part constituting the protrusion 23AL. Similarly, a portion surrounded by the right peripheral edge 49c in the occupant side panel portion 49 (a portion surrounded by a line L7 connecting the right peripheral edge 49c and the end portion of the right peripheral edge 49c) 49d and the rear in the peripheral wall panel portion 42. A portion surrounded by the right edge 42e (a portion surrounded by the line L8 connecting the ends of the rear right edge 42e and the rear right edge 42e) 42g is a protruding portion when the inflation of the airbag 40 is completed. It becomes a part which comprises 23AR.

  Also, in the airbag base fabric 41 of the second embodiment, the airbag 40 is configured by folding back at the folding lines CL5, CL6, CL7, and CL8 from the flatly deployed state and sewing the periphery in a plane. It will be. Then, as shown in FIG. 12, the intersection angle between the fold line CL5 and the left edge 42b of the peripheral wall panel portion 42 (intersection angle between the fold line CL7 and the right edge 42c of the peripheral wall panel portion 42) β2, and the fold line CL5 A crossing angle (a crossing angle between the fold line CL7 and the rear right edge 42e in the peripheral wall panel portion 42) α3 of the peripheral wall panel portion 42 and the left peripheral edge 49a of the center line C2 and the occupant side panel portion 49. The intersection angle (intersection angle between the center line C2 and the right peripheral edge 49c of the occupant side panel portion 49) α4 (coincidence with the intersection angle α3) is set to 90 ° or less. Of course, also in the airbag fabric 41 of the second embodiment, the intersection angle β2 is set to exceed 90 ° depending on the design of the vehicle to be mounted, as in the airbag fabric 27 described above. Also good.

  Then, as shown in FIG. 12A, the airbag base fabric 41 is folded back so as to overlap each other at the center line C2 from the flatly deployed state, and the front edge 42a of the peripheral wall panel portion 42 is obtained. The left edge 42b and the right edge 42c, which are part of the fan-shaped edges 48L and 48R, are continuously sewn together using a suture thread to form a stitched portion 37A, and the peripheral wall panel 42 is connected to the front end. It is set as the substantially cylinder shape which obstruct | occluded the side (refer B of FIG. 12). Thereafter, the rear left edge 42d and the rear right edge 42e, which are the remaining portions of the fan-shaped edges 48L and 48R in the peripheral wall panel portion 42, are made to coincide with the left peripheral edge 49a and the right peripheral edge 49c of the occupant side panel portion 49. And the rear right edge 42e is widened so as to be separated from each other, and the portions 42f and 42g on the rear side of the peripheral wall panel portion 42 are placed on the occupant side panel portion 49 while making creases at fold lines CL5, CL6, CL7, and CL8. The rear left edge 42d and the rear right edge 42e are sewn to the left peripheral edge 49a and the right peripheral edge 49c of the occupant side panel 49 using a suture thread, respectively, and a suture part 38A (38AL, 38AR) (see FIG. 12C), and the second seam as shown in FIG. 13 and FIG. 14 is obtained by reversing it using the gas inlet 18A so as not to expose the seam allowance of the edge to the outside. It is possible to manufacture the airbag 40 forms.

  Also in the airbag 40 of the second embodiment, although the airbag 40 is configured to complete expansion so as to be recessed with the starting point P2 as the center, the fan-shaped edge portions 48L and 48R in the peripheral wall panel portion 42 and the starting point Since the sum of the angles with respect to the starting point P2 is set to exceed 360 °, the part of the occupant side panel part 49 constituting the periphery of the part P2 is a part of the fan-shaped edges 48L and 48R. And the part of the passenger | crew side panel part 35 which comprises the circumference | surroundings of the origin part P2 makes an outer periphery convex, and the sewing operation | work which sews the periphery of these parts becomes easy. Therefore, in the airbag 40 according to the second embodiment, even when the inflation is completed, the sewing operation for sewing the peripheral edges of the airbag base fabric 41 constituting the airbag 40 is easy even when the airbag 40 is configured to include the recess 24A. Therefore, the manufacturing man-hour and cost of the airbag 40 can be reduced.

  Moreover, in the airbag 40 of 2nd Embodiment, the site | part of the base fabric 41 for airbags which comprises the circumference | surroundings of the origin part P2 WHEREIN: The sum total of angle (theta) 4, (theta) 5, (theta) 6 on the basis of the origin part P2 exceeds 360 degrees. As described above, the portion of the airbag base fabric 41 that forms the periphery of the starting point portion P2 is configured to form a surplus, and the portion around the starting point portion P2 can be smoothly smoothed. The protrusions 23AL and 23AR are formed by protruding. Therefore, the part of the starting point part P2 is in a relatively concave manner while the parts located on the left and right sides of the periphery protrude, and the part of the starting point part P2 is surely recessed when the expansion is completed. Can do. Furthermore, in the airbag 40 of the second embodiment, at the time of manufacture, the airbag base fabric 41 is folded back at the portion of the center line C2, and the front edge 42a, the left edge 42b, and the right edge 42c of the peripheral wall panel portion 42 are mutually connected. Since the peripheral wall panel portion 42 can be formed into a substantially cylindrical shape with the front end side closed, if two pieces are necessary for the sewing operation of the peripheral wall panel portion 28. Compared with the airbag 15 of the first embodiment, the sewing procedure can be simplified, and the number of manufacturing steps and cost can be further reduced.

  Furthermore, in the airbag 40 of the second embodiment, as shown in FIG. 11, the peripheral wall panel portion 42 has a substantially rectangular shape, compared with the substantially fan-shaped peripheral wall panel portion 28 in the airbag 15 described above. The area is enlarged by extending the left and right end portions forward. Therefore, as shown in FIGS. 13 and 14, the airbag 40 is set such that the volume of the portion of the vehicle body side portion 16 </ b> A at the completion of the inflation is larger than that of the vehicle body side portion 16 of the airbag 15 described above. . That is, in the embodiment, the vehicle body side portions 16 and 16A can be obtained by changing the amount of forward projection of the left and right ends of the peripheral wall panel portions 28 and 42 and changing the shape and area of the peripheral wall panel portions 28 and 42. The volume of the part can be easily changed.

  Next, the airbag 52 of 3rd Embodiment is demonstrated. As shown in FIGS. 15 to 17, the airbag 52 of the third embodiment includes a bag main body 53, a rectifying cloth 55 arranged in the bag main body 53, and a tether that regulates the shape of the bag main body 53 when the inflation is completed. 58. As shown in FIG. 18, the bag main body 53 is composed of an airbag base fabric 27A having substantially the same shape as the airbag base fabric 27 constituting the airbag 15 of the first embodiment. Since the shape at the time is substantially the same as that of the airbag 15, the same members are denoted by the same reference numerals and the description thereof is omitted. In the airbag 52 of the third embodiment, a vent hole 54 is formed at a predetermined position of the left side wall 15c and the right side wall 15d so that excess inflation gas flowing into the airbag 52 can be exhausted. (See FIG. 15).

  As shown in FIG. 16, the rectifying cloth 55 is disposed so as to cover the upper side of the gas inlet 18 in the bag main body 53, and the inflation gas G flowing in from the gas inlet 18 is forward and backward. It is made into the substantially cylindrical shape which opened both ends of the front-back direction so that commutation was possible. That is, in the airbag 52 of the third embodiment, the inflation gas G that has flowed from the gas inlet 18 flows into the bag main body 53 through the openings 56A and 56B before and after the rectifying cloth 55. Further, the rectifying cloth 55 is formed with a through hole 57 having an opening area smaller than that of the front and rear openings 56A and 56B and allowing the expansion gas flowing from the gas inlet 18 to escape. In the case of the embodiment, the through-holes 57 are formed so as to open in a circular shape at two symmetrical positions above the gas inlet 18 when the airbag 52 is completely inflated (see FIG. 17). This through-hole 57 stabilizes the directions of the openings 56A and 56B before and after the rectifying cloth 55 when the airbag 52 is deployed and inflated by escaping part of the inflation gas flowing in from the gas inlet 18. In order to stabilize the outflow direction of the inflation gas G into the bag main body 53, it is provided.

  In the case of the embodiment, the rectifying cloth 55 is composed of the two rectifying cloth materials 60L and 60R shown in FIG. The rectifying cloth materials 60L and 60R are symmetrical, and each includes a connecting portion 61 that forms the peripheral edge 17 of the gas inlet 18, and a main body portion 62 that extends from the connecting portion 61 to the left side or the right side. It is configured. Each connecting portion 61 is formed with an opening 61 a corresponding to the gas inlet 18 and an opening 61 b corresponding to the mounting hole 19, and each body portion 62 is formed with a through hole 57. In the case of the embodiment, the rectifying cloth 55 includes a tether base cloth 65 and a reinforcing member, which will be described later, in a state where the connecting portions 61 in the respective rectifying cloth materials 60L and 60R are overlapped so that the openings 61a and 61b coincide with each other. Along with the fabric 66, the entire periphery is sewn to the airbag base fabric 27, and the edges of the main body 62 are sewn together.

  The tether 58 is for maintaining the dent shape of the occupant protection portion 22 in the bag body 53 when the inflating is completed. The tether 58 is formed as a single band, and the width of the rear end 58a is approximately along the vertical direction. In this way, the front end 58b located on the rear edge side of the gas inlet 18 is connected to the rear side wall portion 15e by being sewn and joined at a position that is substantially the center of the rear side wall portion 15e. This is a configuration in which a retainer (not shown) is used together with the peripheral edge 17 to be fixed and coupled to the case. That is, the tether 58 is arranged so that the rear end 58a side is substantially along the vertical direction, and the front end 58b side is substantially along the horizontal direction. As shown in FIGS. 16 and 17, the intermediate portion is arranged so as to be twisted.

  In the case of the embodiment, the tether 58 has a configuration in which two strip-shaped tether base fabrics 64 and 65 are connected in series in the front-rear direction. The tether base fabric 64 located on the rear side has a substantially trapezoidal shape, and is sewn to the rear side wall portion 15e so that the rear edge 64a on the bottom side is substantially along the vertical direction, and is on the upper side. The front edge 64b is sewn to the rear edge 65b of the tether base cloth 65 located on the front side. The tether base fabric 65 located on the front side covers the peripheral edge 17 of the gas inlet 18 and has a belt-like shape extending from the gas inlet 18 to both the front and rear sides. The sewing portion 39 is configured to be protected by sewing the center edge 28a, the front left edge 28b, and the front right edge 28c. An opening 65 c corresponding to the gas inlet 18 and an opening 65 d corresponding to the attachment hole 19 are formed in the tether base fabric 65.

  In the third embodiment, as shown in FIG. 18, the bag body 53 includes an airbag base cloth 27A, a substantially circular reinforcing cloth 66 that reinforces the peripheral edge 17 of the gas inlet port 18, and an airbag base. The reinforcing patch 67 includes three reinforcing patches 67 capable of reinforcing the portion of the starting point P1 in the cloth 27A.

  The airbag 52 of the third embodiment is manufactured as follows. As shown in FIG. 19A, the reinforcing patch 67 is sewn to the airbag base fabric 27A that has been flattened in advance, and the rear edge 64a of the tether base fabric 64 is preliminarily attached to the airbag base fabric 27A. The occupant side panel 35 is sewn. Further, a tether base cloth 65, flow regulating cloth materials 60L and 60R, and a reinforcing cloth 66 are sequentially stacked on the airbag fabric 27A, and the portion of the peripheral edge 17 of the gas inflow port 18 and the flow regulating cloth material 60L. 60R, the tether base cloth 65, the rectifying cloth materials 60L and 60R, and the reinforcing cloth 66 are sewn to the airbag base cloth 27A at the peripheral portion of the connecting portion 61 in 60R. Put on. Thereafter, the gas inlet 18 and the mounting hole 19 are formed by drilling. In the embodiment, after the tether base cloth 65, the rectifying cloth materials 60L and 60R, and the reinforcing cloth 66 are sewn on the airbag base cloth 27A, the gas inlet 18 and the gas inlet 18 are formed by drilling. The mounting holes 19 are formed. Of course, the gas inlet 18 and the mounting holes 20 are formed in the airbag fabric 27A, the tether fabric 65, the flow regulating fabric materials 60L and 60R, and the reinforcing fabric 66, respectively. May be formed in advance.

  After that, the airbag base fabric 27A that has been flattened is overlapped with each other while the outer peripheral side at the completion of the inflation is located inside at the center line C1, as shown in FIGS. 19A and 19B. The left edge 28d and the right edge 28e, which are part of the fan-shaped edge portions 34AL and 34AR in the peripheral wall panel portion 28A, are sewn using a suture thread to form a suture portion 37. After that, as shown in FIG. 19B and FIG. 20A, the rear left edge 28f and the rear right edge 28g, which are the remaining portions of the fan-shaped edge portions 34AL and 34AR in the peripheral wall panel portion 28A, are connected to the left peripheral edge 35a of the occupant side panel portion 35A. The rear left edge 28f and the rear right edge 28g are spread apart from each other so as to coincide with the right peripheral edge 35c, and the occupant side panel portion 35A is formed with creases at fold lines CL1, CL2, CL3, and CL4. Place the rear left edge 28f of the peripheral wall panel portion 28A on the left side peripheral edge 35a of the occupant side panel portion 35A using a suture thread to place the suture portion 38L. Then, the rear right edge 28g of the peripheral wall panel portion 28A is sewn to the right peripheral edge 35c of the occupant side panel portion 35A to form a stitched portion 38R. Thereafter, the edges of the main body portions 62, 62 of the rectifying cloth materials 60L, 60R are sewn together.

  Next, as shown in FIG. 20B, the front edge 64b of the tether base fabric 64 and the rear edge 65b of the tether base fabric 65 are sewn together, and the unsewn portion of the airbag base fabric 27A is utilized. After reversing so that the seam allowance of the edge portion is not exposed to the outside, the front center edge 28a, the front left edge 28b, and the front right edge 28c of the peripheral wall panel portion 28 are sewn and sewn using a suture thread. If the part 39 is formed, the airbag 52 can be manufactured.

  In the airbag 52 of 3rd Embodiment, the bag main body 53 is the shape similar to the airbag 15 of 1st Embodiment, and can obtain the effect | action and effect similar to the airbag 15 of 1st Embodiment. Further, in the airbag 52 of the third embodiment, the tether 58 for maintaining the recessed shape of the occupant protection part 22 in the airbag 52 at the completion of the inflation is disposed in the bag body 53. When the expansion of the bag 52 is completed, it is preferable that the occupant protection unit 22 can be reliably recessed with the starting point P1 as the center.

  Next, the airbag 70 of 4th Embodiment is demonstrated. As shown in FIGS. 21 to 23, the airbag 70 of the fourth embodiment includes a bag body 71, a rectifying cloth 55 </ b> A disposed in the bag body 71, and a tether that regulates the shape of the bag body 71 when the inflation is completed. 58A. The airbag 70 of the fourth embodiment has the same configuration as the airbag 52 of the third embodiment except for the airbag base fabric 72 that forms the bag body 71. That is, the bag body 71 has the same configuration as that of the airbag 15 of the first embodiment except that the outer shape of the airbag 15 of the first embodiment is slightly different from that of the airbag 15 of the first embodiment. In addition, the same figure code | symbol which attached | subjected "B" to the end of the member which comprises the airbag 15 of 1st Embodiment is attached | subjected, and description is abbreviate | omitted. The airbag 70 according to the fourth embodiment also includes the recesses 24B formed by recessing the upper end 22a side in the vicinity of the left and right centers of the upper end 22a side of the occupant protection unit 22B when inflation is completed, The two projecting portions 23BL and 23BR that project relatively obliquely rearward and upward are provided. And in the airbag 70 of 4th Embodiment, the periphery of the base fabric 72 for airbags is mutually sewn on the site | part of the right-and-left center vicinity by the side of the upper end 22a of passenger | crew protection part 22B. A starting point P3 in which the stitched portions 37B, 38BL, and 38BR extend radially is formed, and the recessed part 24B is configured so as to dent the occupant protection part 22B around the starting point P3.

  Further, the flow straightening cloth 55A and the tether 58A have the same configuration except that the shape is slightly different from the flow straightening cloth 55 and the tether 58 in the airbag 52 of the third embodiment. The description is abbreviate | omitted using the same figure code | symbol which attached | subjected. The tether 58A is sewn at the rear end 58a at a position near the left and right centers of the rear side wall portion 15e and slightly above the upper and lower centers.

  As shown in FIG. 24, the airbag base fabric 72 constituting the bag body 71 in the airbag 70 of the fourth embodiment is a peripheral wall panel section composed of two sheets, a left panel section 74 and a right panel section 79. 73 and one occupant side panel portion 84. The left panel portion 74 and the right panel portion 79 are symmetrical with each other. The left panel 74 has a substantially fan shape with the occupant side panel 84 expanded, and the left side 75 of the left side wall 15c is the upper and lower center, and the left side of the upper side wall 15a. The left upper part 76 constituting the part (the part arranged on the left side of the suture part 37B) is arranged, and the lower left side part 77 constituting the left part of the lower side wall portion 15b is arranged on the lower side. Yes. The right panel portion 79 is symmetrical to the left panel portion 74 and has a right portion 80 (on the right side of the suture portion 37B) on the upper side with the right portion 80 constituting the right wall portion 15d as the center in the vertical direction. The upper right side portion 81 that constitutes the right side portion of the lower wall portion 15b is disposed on the lower side, and the lower right side portion 82 that constitutes the right side portion of the lower side wall portion 15b is disposed on the lower side. That is, the left side panel part 74 and the right side panel part 79 constituting the peripheral wall panel part 73 are divided into the upper side wall part 15a, the lower side wall part 15b, the left side wall part 15c, and the right side wall part 15d with respect to the upper side wall part 15a. It is made into the shape divided | segmented into the left-right center and the left-right center of the lower side wall part 15b. Further, the rear edges 74e and 79e of the left panel portion 74 and the right panel portion 79 are configured so that the outer shapes thereof coincide with a left peripheral edge 84a and a right peripheral edge 84b, which will be described later, in the occupant side panel section 84. In the case of the embodiment, each rear edge 74e, 79e is curved in a substantially ¼ arc shape so that the upper part is connected to the upper edge 74d, 79d, and the intermediate part is a linear shape substantially along the vertical direction. The lower part is a straight line inclined so that the lower end side is positioned forward. In the airbag fabric 72 of the fourth embodiment, the upper edge 74d and the rear edge 74e of the left panel 74 constitute a fan-shaped edge 83L, and the upper edge 79d and the rear edge 79e of the right panel 79 are fan-shaped. The edge part 83R is comprised and the surrounding wall panel part 73 is set as the structure provided with fan-shaped edge part 83L, 83R.

  The occupant side panel portion 84 has a substantially home-base shape that is symmetrical with respect to the center line C3. Further, the occupant side panel portion 84 has a left and right peripheral edge 84a disposed on the left side of the starting point portion P3 and a right peripheral edge 84b disposed on the right side of the starting point portion P3, with the left and right centers as starting point portions P3, respectively. The left panel portion 74 and the right panel portion 79 are configured so as to extend along the rear edges 74e and 79e.

  And in the airbag base fabric 72 which comprises the airbag 70 of 4th Embodiment, 74 d of upper edges in the site | part of the fan-shaped edge part 83L of the left side panel part 74 corresponding to the starting part P3 of the passenger | crew side panel part 84. And the intersection of the rear edge 74e and the intersection of the upper edge 79d and the rear edge 79e in the fan-shaped edge 83R of the right panel 79 constitute the starting point P3. And in the airbag base fabric 72 that constitutes the airbag 70 of the fourth embodiment, the part that forms the periphery of the starting part P3 and is surrounded by the suture parts 37B, 38BL, 38BR is based on the starting part P3. The sum of the angles is configured to exceed 360 °. Specifically, the crossing angle θ7 between the upper edge 74d and the rear edge 74e centering on the starting point P3 in the left panel 74 (the part of the fan-shaped edge 83L in the left panel 74 and the stitched parts 37B, 38BL) An angle between the upper edge 79d and the rear edge 79e centering on the starting point P3 in the right panel portion 79 (the portion of the fan-shaped edge portion 83R in the right panel portion 79), The angle of the portion 79f surrounded by the stitched portions 37B and 38BR and coincides with the intersection angle θ7), and the intersection angle θ9 between the left peripheral edge 84a and the right peripheral edge 84b in the occupant side panel portion 84 (sewing in the occupant side panel portion 84) The angle of the portion 84c surrounded by the portions 38BL and 38BR) is set so as to exceed 360 °.

  In the fourth embodiment, as shown in FIG. 24, the bag body 71 includes a belt-shaped reinforcing cloth 86 that reinforces the front lower edges 74b and 79b of the left panel 74 and the right panel 79, and a gas flow. Three reinforcements that can reinforce a belt-like protective cloth 87 disposed in front of the entrance 18B and a starting portion P3 in the left panel 74, the right panel 79, and the occupant side panel 84 to protect a stitched site, which will be described later. A patch 67 is provided.

  The airbag 70 according to the fourth embodiment is manufactured as follows. A reinforcing patch 67 and a rear edge 64a of the tether base fabric 64A are sewn on the passenger side panel portion 84 in advance. First, as shown in FIGS. 25A and 25B, the left panel portion 74 and the right panel portion 79 are overlapped with each other in a state where the left panel portion 74 and the right panel portion 79 are flattened, and the rear lower edges 74c and 79c are joined together with a suture thread. Is used to form a suture site 89. Thereafter, as shown in FIG. 25C, the left panel portion 74 and the right panel portion 79 are opened so as to dispose the stitched portion 89 inside, and the reinforcing cloth 86 is opened to the left panel portion 74 and the right panel portion. 79, the front lower edges 74b and 79b are arranged so as to cover, and the rear end side is sewn to the left panel portion 74 and the right panel portion 79 on the front end side of the stitching portion 89 using a suture thread. Next, as shown in FIGS. 26A and 26B, the tether base cloth 65A, the rectifying cloth materials 60AL and 60AR, and the protective cloth 87 are sequentially stacked, and the peripheral edge 17B of the gas inlet 18B and the rectifying cloth are stacked. The tether base cloth 65A, the rectifying cloth materials 60AL and 60AR, the reinforcing cloth 86, and the protective cloth 87 are connected to the peripheral portion of the connecting portion 61A of the materials 60AL and 60AR for the left side panel using the suture thread. 74 and the right panel 79 are sewn. Thereafter, the gas inlet 18B and the mounting hole 19B are formed by drilling. Further, the reinforcing patch 67 is sewn to the left panel portion 74 and the right panel portion 79 using a suture thread.

  Thereafter, as shown in FIG. 26C, the left panel portion 74 and the right panel portion 79 are folded back at the stitching portion 89 so that the peripheral edges thereof coincide with each other, and are upper portions that are part of the fan-shaped edges 83L and 83R. The edges 74d and 79d are sewn together with a suture to form a sutured portion 37B. Then, as shown in FIG. 26C and FIG. 27A, the rear edges 74e and 79e, which are the remaining portions of the fan-shaped edge portions 83L and 83R in the left panel portion 74 and the right panel portion 79, are placed on the left side in the occupant side panel portion 84. The rear edges 74e and 79e are spread apart so as to coincide with the peripheral edge 84a and the right peripheral edge 84b, and the occupant-side panel part 84 is folded along the fold line CL5, while the occupant-side panel part 84 is placed on the left panel part 74 and the right panel part 79. The rear edge 74e of the left panel portion 74 is sewn to the left peripheral edge 84a of the occupant side panel portion 84 using a suture to form a sutured portion 38BL, and the rear edge 79e of the right panel portion 79 is occupant. The stitched portion 38BR is formed by sewing to the right peripheral edge 84b of the side panel portion 84.

  Thereafter, as shown in FIG. 27A, the edges of the body portions 62A and 62A of the rectifying fabric materials 60AL and 60AR are sewn together, and the front edge 64b of the tether base fabric 64A and the tether base fabric 65A are sewn. The trailing edge 65b is sewn. Next, the left panel portion 74 and the right panel portion 79 are reversed so that the seam allowance of the edge portion is not exposed to the outside using the unsewn portion, and as shown in FIG. The airbag 70 can be manufactured by sewing the front edges 74a, 79a of the right panel portion 79 together with a suture to form the sutured portion 39B.

  In the airbag base fabric 72 constituting the airbag 70 of the fourth embodiment, the folding line CL5 and the left panel 74 (right panel 79) of the peripheral wall panel 73 are also shown in FIG. The crossing angle β3 with the upper edge 74d (79d) and the crossing angle α4 between the folding line CL5 and the rear edge 74e (79e) of the left panel portion 74 (right panel portion 79) are both 90 ° or less. Is set. Of course, in the airbag base fabric 72 of the fourth embodiment, the intersection angle β3 may be set to exceed 90 ° depending on the design of the vehicle to be mounted. Also in the airbag 70 of the fourth embodiment, the airbag base fabric 72 constituting the airbag 70 is made to be bilaterally symmetric, and the left peripheral edge 85a and the right peripheral edge 85b of the occupant side panel portion 84 are Since the shape is formed along the rear edges 74e and 79e of the left panel 74 and the right panel 79 that constitute the peripheral wall panel 73, the edges are unfolded flatly during the suturing operation. Flat stitching can be performed in the state, and the stitching operation becomes easy.

  Even in the airbag 70 of the fourth embodiment, although the airbag 70 is configured to complete inflation so as to be recessed around the starting point P3, the fan-shaped edge portions 83L and 83R in the peripheral wall panel portion 73 and the starting point Since the part 84c of the occupant side panel part 84 that forms the periphery of the part P3 is set so that the sum of the angles with respect to the starting point part P3 exceeds 360 °, the fan-shaped edge parts 83L and 83R The part and the part 84c of the occupant-side panel part 84 that forms the periphery of the starting point part P3 have an outer peripheral edge as a convex shape, and a sewing operation for sewing the peripheral edges of these parts is facilitated. Therefore, in the airbag 70 of the fourth embodiment, when the inflation is completed, the sewing operation for sewing the peripheral edges of the airbag base fabric 72 constituting the airbag 70 is easy even if the airbag 70 has the recess 24B. As a result, the manufacturing man-hours and costs of the airbag 70 can be reduced.

  Also in the airbag 70 of the fourth embodiment, the portions 74f, 79f, 84c of the airbag base fabric 72 that form the periphery of the starting point portion P3 have angles θ7, θ8, θ9 with respect to the starting point portion P3. Since the sum is set so as to exceed 360 °, the portions 74f, 79f, 84c of the airbag base fabric 72 that form the periphery of the starting point portion P3 are in a form that constitutes the surplus, The projecting portions 23BL and 23BR are configured by smoothly projecting the portion around the starting portion P3. Therefore, the part of the starting point part P3 is in a relatively concave manner while the parts located on the left and right sides of the periphery protrude, and the part of the starting point part P3 is surely recessed when the expansion is completed. Can do. Further, also in the airbag 70 of the fourth embodiment, the tether 58A for maintaining the recessed shape of the occupant protection part 22B in the airbag 70 at the completion of the inflation is disposed in the bag body 71. When the inflation of the airbag 70 is completed, it is preferable that the occupant protection part 22B can be reliably recessed with the starting point P3 as the center.

  Furthermore, in the airbag 70 of the fourth embodiment, the airbag base fabric 72 constituting the airbag is divided into three pieces, that is, a left panel portion 74, a right panel portion 79, and an occupant side panel portion 84. The size of each base fabric is reduced as compared with the case where the airbag is composed of one airbag base fabric 27, 27A, 41 like the airbags 15, 40, 52 of the first to third embodiments described above. be able to. Specifically, as shown in FIG. 28, when the base fabric constituting the airbag 70 is cut from the large airbag fabric 90A, the left panel 74, the right panel 79, the occupant panel 84, the rectification Since the fabric materials 60AL and 60AR, the tether base fabrics 64A and 65A, the reinforcing fabric 86, and the protective fabric 87 can be arranged with a gap between them being suppressed, the fabric from the airbag fabric material 90A The generation of the remaining material can be reduced, the yield of the airbag fabric material 90A can be improved, and the manufacturing cost can be further reduced. In FIG. 28, the member indicated by the reference numeral “13” is the wrapping sheet 13.

  Further, as a modification of the airbag 70 of the fourth embodiment, the airbag 70A of the fifth embodiment configured by the airbag base fabric 72A shown in FIG. 29 may be used. In the airbag 70A of the fifth embodiment, each of the left panel portion 74A and the right panel portion 79A includes protrusions 74g and 79g that constitute the peripheral edge 17B of the gas inlet 18B at the front lower edges 74b and 79b. The configuration is the same as that of the airbag 70 of the fourth embodiment except that the reinforcing cloth 86 used in the fourth embodiment is not necessary, and the same members are denoted by the same reference numerals. Description is omitted.

  In the airbag 70A of the fifth embodiment, after forming the stitched portion 89, an intermediate portion of the tether base fabric 65A is sewn to the left panel portion 74A and the right panel portion 79A that are opened so as to place the stitched portion 89 inside. Except for making it, as shown to FIGS. 30-32, it can manufacture like the above-mentioned airbag 70. FIG. Also in the airbag 70A of the fifth embodiment, as shown in FIG. 33, when the base fabric constituting the airbag 70A is cut from the large airbag fabric material 90B, the left panel portion 74A and the right panel portion 79A. Since the occupant-side panel portion 84, the rectifying fabric materials 60AL and 60AR, the tether base fabrics 64A and 65A, and the protective fabric 87 can be disposed with no gaps therebetween, the airbag fabric The generation of the remaining material from the material 90B can be reduced, and the yield of the airbag fabric material 90B can be improved.

  Next, the airbag 93 of 6th Embodiment is demonstrated. As shown in FIGS. 34 to 36, the airbag 93 of the sixth embodiment includes a bag body 71, a rectifying cloth 55 </ b> A disposed in the bag body 71, and a tether that regulates the shape of the bag body 71 when the inflation is completed. 94. As shown in FIG. 37, the airbag 93 of the sixth embodiment has the same configuration as the airbag 70 of the above-described fourth embodiment except for the tether 94, and the same members are denoted by the same reference numerals. Therefore, the description is omitted.

  The tether 94 includes a strip-like lateral coupling portion 95 disposed substantially along the left-right direction so as to connect the left side wall portion 15c and the right side wall portion 15d of the bag main body 71 when the inflation is completed, and the left and right sides of the lateral coupling portion 95 And a belt-like vertical connecting portion 96 disposed substantially along the front-rear direction so as to connect the vicinity of the center of the vehicle and the vicinity of the left and right centers of the occupant protection portion 22B. In the case of the embodiment, the horizontal connecting portion 95 is arranged so as to be inclined so that the front side in the width direction is positioned upward and the rear side is positioned downward, and the left and right edges 95a and 95b are respectively The left and right side wall portions 15c and 15d are sewn to the right side wall portion 15d so that the left and right width dimensions of the bag body 71 at the completion of the inflation can be regulated. In the case of the embodiment, as shown in FIG. 35, the horizontal connecting portion 95 is arranged at a position slightly behind the front and rear centers of the bag body 71 when inflation is completed and slightly above the upper and lower centers. Yes. The vertical connecting portion 96 is arranged with the width direction extending substantially in the vertical direction, and the front and rear edge portions 96a and 96b are arranged around the central portion 95c of the horizontal connecting portion 95 and the left and right center of the rear side wall portion 15e. And is sewn to the position. In the case of the embodiment, the rear edge portion 96b of the vertical connecting portion 96 is sewn at a position that is the center of the left and right sides of the rear side wall portion 15e and slightly above the center of the top and bottom. In the case of the embodiment, the tether 94 is for two substantially rectangular base connecting fabrics 97 that form the horizontal connecting portion 95 and one generally rectangular vertical connecting portion that forms the vertical connecting portion 96. The base fabric 98 is composed of three base fabrics. One end 97a, 98a side is sewn to the left panel 74, the right panel 79, and the occupant side panel 84, respectively. The other end portions 97b and 98b are sewn together.

  The airbag 93 of the sixth embodiment is manufactured as follows. End portions 97a of the lateral connecting portion base fabric 97 are previously sewn to the left panel portion 74 and the right panel portion 79. In addition, a reinforcing patch 67 and an end portion 98a of the longitudinal connecting portion base fabric 98 are sewn to the occupant side panel portion 84 in advance. Thereafter, similarly to the airbag 70 of the fourth embodiment, as shown in FIG. 38, the rear lower edges 74c and 79c of the left panel portion 74 and the right panel portion 79 are sewn together using a suture, A stitched portion 89 is formed, and the reinforcing cloth 86 is sewn to the left panel portion 74 and the right panel portion 79. Thereafter, as shown in FIG. 39 and FIG. 40A, it is formed in the same manner as the airbag 70 of the fourth embodiment, and the edges of the main body portions 62A and 62A in the rectifying fabric materials 60AL and 60AR are sewn together. After inverting the stitching margin of the edge portion so as not to be exposed to the outside using the unstitched portions of the left panel portion 74 and the right panel portion 79, the base fabrics 97, 97 for the horizontal connection portions, for the vertical connection portions If the end portions 97b, 97b, 98b of the base fabric 98 are sewn together, and the front edge 74a, 79a of the left panel portion 74 and the right panel portion 79 are sewn together using a suture thread to form a stitched portion 39B. The airbag 93 can be manufactured.

  In the airbag 93 of the sixth embodiment, the bag main body 71 has the same configuration as the bag main body 71 of the airbag 70 of the fifth embodiment, and obtains the same operations and effects as the airbag 70 of the fifth embodiment. Can do. Also, in the airbag 93 of the sixth embodiment, the tether 94 for maintaining the recessed shape of the occupant protection portion 22B in the airbag 93 at the completion of the inflation is disposed in the bag body 71. When the inflation of the airbag 93 is completed, it is preferable that the occupant protection portion 22B can be reliably recessed with the starting point P3 as the center. In particular, in the airbag 93 of the sixth embodiment, the tether 94 includes a lateral coupling portion 95 that couples the left side wall portion 15c and the right side wall portion 15d, the left and right central portions of the lateral coupling portion 95, and an occupant protection portion. 22B has a vertical connecting portion 96 that connects the left and right central portions, and the horizontal connecting portion 95 can also regulate the left and right width dimensions of the bag body 71 when the inflation is completed. It can suppress that the volume at the time of completion | finish of expansion | swelling of the bag 93 increases.

  Also in the airbag 93 of the sixth embodiment, as shown in FIG. 41, when the base fabric constituting the airbag 93 is cut from the large airbag fabric material 90C, the left panel portion 74 and the right panel portion 79 are cut. The occupant side panel portion 84, the rectifying fabric materials 60AL and 60AR, the lateral connecting portion base fabrics 97 and 97, the vertical connecting portion base fabric 98, and the protective fabric 87 are arranged while suppressing the generation of a gap therebetween. Therefore, the generation of the remaining material from the airbag fabric material 90C can be reduced, and the yield of the airbag fabric material 90C can be improved. In particular, in the airbag 93 of the sixth embodiment, since the tether 94 is composed of three lateral connection portion base fabrics 97, 97 and vertical connection portion base fabric 98, the tether base fabrics 64, 65 are provided. Compared with the airbag 70 of the fourth embodiment in which only the shape is changed, the yield can be further improved. FIGS. 28 and 41 both show airbag fabrics 90A and 90C capable of manufacturing two airbags 70 and 93, but airbag fabric 90C for manufacturing airbag 93 of the sixth embodiment. The length dimension D1 (see FIG. 41) is set smaller than the length dimension D2 (see FIG. 28) of the airbag fabric material 90A for manufacturing the airbag 70 of the fourth embodiment. As a result, in the airbag 93 of the seventh embodiment, the yield of the airbag fabric material 90C can be further improved.

  As a modification of the airbag 93 of the sixth embodiment, as shown in FIG. 42, a tether 94 similar to the airbag 93 of the sixth embodiment is added to the airbag base fabric 72A similar to the fifth embodiment. You may use the airbag 93A of the structure which arrange | positions.

  Next, the airbag 100 of 7th Embodiment is demonstrated. As shown in FIGS. 43 to 45, the airbag 100 of the seventh embodiment includes a bag body 101, a rectifying cloth 55 </ b> A disposed in the bag body 101, and a tether that regulates the shape of the bag body 101 when the inflation is completed. 121. Since the shape of the airbag base fabric 102 is different, the bag main body 101 is slightly different from the airbag 15 of the first embodiment when it is inflated. Since the configuration is the same as that of the airbag 15 of the first embodiment, the same member is denoted by the same reference numeral with “C” added to the end of the member constituting the airbag 15 of the first embodiment. Description is omitted. The airbag 100 of the seventh embodiment is also provided with a recess 24C formed by denting the upper end 22a side in the vicinity of the left and right centers on the upper end 22a side of the occupant protection portion 22C at the time of completion of the inflation. The two projecting portions 23CL and 23CR projecting relatively obliquely rearward and upward are provided. And also in the airbag 100 of 7th Embodiment, the periphery of the base fabric 102 for airbags is mutually sewn on the site | part of the left-right center vicinity of the upper end 22a side of passenger | crew protection part 22C. A starting point P4 in which the stitched portions 37C, 38CL, and 38CR extend radially is formed, and the recessed part 24C is configured to dent the occupant protection part 22C with the starting point P4 as the center.

  The rectifying cloth 55A disposed in the bag body 101 has the same configuration as the rectifying cloth 55A in the airbag 70 of the fourth embodiment described above, and the same members are denoted by the same reference numerals. Description is omitted.

  As shown in FIG. 46, the airbag base fabric 102 constituting the bag body 101 in the airbag 100 of the seventh embodiment is a peripheral wall panel portion composed of two sheets, a left panel portion 104 and a right panel portion 109. 103 and an occupant side panel portion 115 composed of two pieces, a left portion 116 and a right portion 117. The left panel portion 104 and the right panel portion 109 are symmetrical to each other. The left panel portion 104 is substantially fan-shaped with the occupant side panel portion 115 side expanded, and the left side portion 105 constituting the left side wall portion 15c is centered in the vertical direction, and the left side of the upper side wall portion 15a. The upper left part 106 constituting the part (the part arranged on the left side of the suture part 37C) is arranged, and the lower left part 107 constituting the left part of the lower side wall portion 15b is arranged on the lower side, and the lower left part 107 A substantially semicircular protruding portion 108 that constitutes the peripheral edge 17C of the gas inlet 18C is disposed on the lower side of the front end. The right panel portion 109 has a symmetrical shape with the left panel portion 104, and the right side portion of the upper side wall portion 15a (on the right side of the stitching portion 37C) is located on the upper side with the right side portion 110 constituting the right side wall portion 15d as the center in the vertical direction. The lower right side portion 112 constituting the right side portion of the lower side wall portion 15b is arranged on the lower side, and the lower right side portion 112 is arranged on the lower side of the front end of the lower right side portion 112. The protrusion 113 that constitutes the peripheral edge 17C of the gas inlet 18C is arranged.

  That is, the left side panel 104 and the right side panel 109 that constitute the peripheral wall panel 103 have regions of the upper side wall 15a, the lower side wall 15b, the left side wall 15c, and the right side wall 15d. It is made into the shape divided | segmented by the center of right and left and the center of right and left of the lower wall part 15b. Further, the rear edges 104d and 109d in the left panel portion 104 and the right panel portion 109 are configured so that the outer shapes match the left and right outer portions 116a and 117a of the left side portion 116 and the right side portion 117 of the occupant side panel portion 115, respectively. Has been. In the case of the embodiment, each of the rear edges 104d and 109d is configured to protrude rearward in a substantially semi-elliptical shape so as to be connected to the upper edges 104b and 109b. In the airbag fabric 102 of the seventh embodiment, the upper edge 104b and the rear edge 104d in the left panel portion 104 constitute a fan-shaped edge portion 114L, and the upper edge 109b and the rear edge 109d in the right panel portion 109 are fan-shaped. An edge 114R is configured, and the peripheral wall panel 103 includes fan-shaped edges 114L and 114R.

  The occupant side panel portion 115 is composed of a left-side portion 116 and a right-side portion 117, each of which is formed by dividing a substantially elliptical base fabric arranged substantially along the longitudinal direction into two parts on the left and right sides. 116 and the right side part 117 are symmetrical with each other. Further, the left side portion 116 and the right side portion 117 are configured to have shapes such that the outer edges 116a and 117a extend along the rear edges 104d and 109d of the left panel portion 104 and the right panel portion 109, respectively. And in the passenger | crew side panel part 115, the upper end of the inner edges 116b and 117b in the left side part 116 and the right side part 117 will comprise the starting part P4 located in the center of right and left.

  And in the airbag base fabric 102 which comprises the airbag 100 of 7th Embodiment, the upper edge of the center of right and left which sewn the inner edge 116b, 117b of the left side part 116 and the right side part 117 in the passenger | crew side panel part 115 was mutually sewn. (The upper end of the stitched portion 126) constitutes the starting point portion P4, the intersection portion of the upper edge 104b and the rear edge 104d at the fan-shaped edge portion 114L of the left panel portion 104 of the corresponding peripheral wall panel portion 103, the right panel portion 109. The intersection part of the upper edge 109b and the rear edge 109d in the part of the fan-shaped edge part 114R constitutes the starting point part P4. And in the airbag base fabric 102 that constitutes the airbag 100 of the seventh embodiment, the portion that surrounds the starting point portion P4 and that is surrounded by the stitched portions 37C, 38CL, and 38CR is based on the starting point portion P4. The total sum of the angles is configured to exceed 360 °. Specifically, the intersection angle θ10 between the upper edge 104b and the rear edge 104d centered on the starting point P4 in the left panel 104 (the fan-shaped edge 114L in the left panel 104, and surrounded by the stitched portions 37C and 38CL. Of the right side panel 109 and the upper edge 109b centered on the starting point P4 and the rear edge 109d (the fan-shaped edge 114R of the right side panel 109, that is, the stitched parts 37C and 38CR). And the intersection angle θ12 of the outer edges 116a and 117a in the occupant side panel portion 115 (the intersection angle θ13 between the outer edge 116a and the inner edge 116b in the left portion 116), It is the sum of the intersection angle θ14 between the outer edge 117a and the inner edge 117b in the right side portion 117. , Suture site 38CL in the passenger-side panel portion 115, the angle of portion 115a surrounded by 38CR, the reference B in FIG. 49), the sum of, to exceed 360 °, are set.

  In the seventh embodiment, as shown in FIG. 46, the bag body 101 includes a substantially circular reinforcing cloth 119 that reinforces the peripheral edge 17C of the gas inlet 18C, and a stitched portion that is disposed in front of the gas inlet 18B. A band-shaped protective cloth 87 for protection is provided.

  The tether 121 includes a belt-like lateral coupling portion 122 disposed substantially along the left-right direction so as to connect the left side wall portion 15c and the right side wall portion 15d of the bag body 101 when the inflation is completed, and the left and right sides of the lateral coupling portion 122 And a belt-like vertical connection portion 123 arranged substantially along the front-rear direction so as to connect the vicinity of the center of the passenger and the vicinity of the left and right centers of the occupant protection portion 22C. In the case of the embodiment, when the airbag 100 is completely inflated, the lateral connection portion 122 is arranged so that the width direction is substantially horizontal, and the left and right edges 122a and 122b are respectively connected to the left side wall. It is configured to be sewn to the portion 15c and the right side wall portion 15d so that the left and right width dimensions of the bag body 101 at the completion of the inflation can be regulated. In the case of the embodiment, as shown in FIG. 44, the lateral coupling portion 122 is disposed at a position that is substantially in the center of the front and rear and the top and bottom of the bag body 101 when the inflation is completed. The vertical connecting portion 123 is arranged with the width direction extending substantially in the vertical direction, and the front and rear edge portions 123a and 123b are arranged near the central portion 122c of the horizontal connecting portion 122 and the left and right central portions of the rear side wall portion 15e. And is sewn to the position. In the case of the embodiment, the rear edge 123b of the vertical connecting portion 123 is sewn at a position on the left and right sides of the rear side wall 15e and slightly above the upper and lower centers. In the case of the embodiment, as shown in FIG. 46, the tether 121 includes two substantially trapezoidal base connecting fabrics 124 for the horizontal connecting portion that constitute the horizontal connecting portion 122, and one sheet that constitutes the vertical connecting portion 123. It is composed of three base fabrics, a right-angled triangular base fabric 125 and a wide end portion 124a, 125a side on the left panel portion 104, right panel portion 109, occupant side, respectively. It is constituted by sewing the panel portion 115 and sewing the other narrow end portions 124b and 125b to each other.

  The airbag 100 according to the seventh embodiment is manufactured as follows. An end portion 124a of the lateral connecting portion base fabric 124 is sewn in advance to the left panel portion 104 and the right panel portion 109, respectively. Further, the left side portion 116 and the right side portion 117 of the occupant side panel portion 115 are overlapped so that the peripheral edges thereof coincide with each other in a flatly developed state, and further, the longitudinal connecting portion base fabric 125 is overlapped, and the inner edges 116b, 117b are overlapped. The suture part 126 is formed by sewing the end part 125a and the end part 125a together using a suture thread. Thereafter, as shown in FIGS. 47A and 47B, the left panel portion 104 and the right panel portion 109 are overlapped so that the peripheral edges thereof coincide with each other in a state where the left panel portion 104 and the right panel portion 109 are flatly deployed. Used to sew together to form a sutured portion 127. Then, as shown in FIG. 47C and FIG. 48A, the left panel 104 and the right panel 109 are opened so as to dispose the stitched portion 127 inside, and the reinforcing cloth 119 and the rectifying cloth material are opened. 60AL, 60AR, and protective cloth 87 are sequentially stacked, and sutures are used at the peripheral edge 17C portion of the gas inlet 18C and the peripheral edge portion of the connecting portion 61A of the flow regulating cloth material 60AL, 60AR. Then, the reinforcing cloth 119, the rectifying cloth materials 60AL and 60AR, and the protective cloth 87 are sewn to the left panel section 104 and the right panel section 109. Thereafter, the gas inlet 18C and the mounting hole 19C are formed by drilling (see B in FIG. 48).

  Next, as shown in FIG. 49A, the left panel portion 104 and the right panel portion 109 are folded back at the stitching portion 127 so that the peripheral edges thereof coincide with each other, and the upper portion which is a part of the fan-shaped edge portions 114L and 114R. The edges 104b and 109b are sewn together with a suture to form a sutured portion 37C. As shown in FIGS. 49A and 49B, the rear edges 104d and 109d which are the remaining portions of the fan-shaped edge portions 114L and 114R in the left panel portion 104 and the right panel portion 109 are replaced with the left side portions 116 in the occupant side panel portion 115, respectively. The rear edges 104d and 109d are widened apart from each other while being folded at the fold line CL6 so as to coincide with the outer edges 116a and 117a of the right side part 117, and the outer edges 116a and 116a, 117a The occupant side panel portion 115 spread apart from each other is placed on the left side panel portion 104 and the right side panel portion 109, and the rear edge 104d of the left side panel portion 104 is an outer edge of the left side portion 116 in the occupant side panel portion 115. 116a is sewn with a suture to form a stitched portion 38CL, and the rear edge 109d of the right panel 109 is placed on the right side. By sewing the outer edge 117a of the position 117 to form a sewn portion 38CR.

  Thereafter, as shown in FIG. 49B, the edges of the main body portions 62A and 62A of the rectifying cloth materials 60AL and 60AR are sewn together, and the unsewn portion between the left panel portion 104 and the right panel portion 109 is used. Then, after reversing so that the seam allowance of the edge portion is not exposed to the outside, the end portions 124b, 124b, 125b of the base fabrics 124, 124 for the horizontal connection portions and the base fabric 125 for the vertical connection portions are sewn together. The airbag 100 can be manufactured by sewing the front edges 104a and 109a of the left panel portion 104 and the right panel portion 109 together with a suture to form the stitched portion 39C.

  In the airbag base fabric 102 constituting the airbag 100 of the seventh embodiment, as shown in FIG. 49A, the folding line CL6 and the rear edge 104d (109d) in the left panel portion 104 (right panel portion 109). ) Is set to 90 ° or less. And in the airbag base fabric 102 which comprises the airbag 100 of 7th Embodiment, in order to support the airbag 100 at the time of completion | finish of inflation to the windshield located ahead, folding line CL6 and the surrounding wall panel part 103 are used. The intersection angle β4 with the upper edge 104b (109b) of the left panel portion 104 (right panel portion 109) is set to exceed 90 °. Also in the airbag 100 of the seventh embodiment, the airbag base fabric 102 that constitutes the airbag 100 has a bilaterally symmetric shape, and the left side portion 116 and the right side portion 117 that constitute the occupant side panel portion 115. Since the outer edges 116a and 117a are shaped so as to follow the rear edges 104d and 109d of the left panel 104 and the right panel 109, respectively, which constitute the peripheral wall panel 103, the edges are mutually connected during the sewing operation. Flat stitching can be performed in a state of being flattened and deployed, and stitching work becomes easy.

  Even in the airbag 100 of the seventh embodiment, although the airbag 100 is configured to complete inflation so as to be recessed with the starting point P4 as the center, the fan-shaped edge portions 114L and 114R in the peripheral wall panel portion 103 and the starting point Since the portion 115a of the occupant side panel portion 115 that forms the periphery of the portion P4 is set so that the sum of the angles with respect to the starting point portion P4 as a reference exceeds 360 °, the fan-shaped edge portions 114L and 114R The part and the part 115a of the occupant side panel part 115 constituting the periphery of the starting point part P4 have an outer peripheral edge as a convex shape, and a sewing operation for sewing the peripheral edges of these parts is facilitated. Therefore, in the airbag 100 according to the seventh embodiment, when the inflation is completed, the sewing operation for sewing the peripheral edges of the airbag base fabric 102 constituting the airbag 100 is easy even if the airbag 24 is configured to include the recess 24C. Therefore, the manufacturing man-hour and cost of the airbag 100 can be reduced.

  Also in the airbag 100 of the seventh embodiment, the portions 104e, 109e, 115a of the airbag fabric 102 that form the periphery of the starting point portion P4 have angles θ10, θ11, θ12 with respect to the starting point portion P4. Since the sum is set so as to exceed 360 °, the portions 104e, 109e, 115a of the airbag fabric 102 that form the periphery of the starting point portion P4 are in a form that constitutes a surplus, The projecting portions 23CL and 23CR are configured by smoothly projecting the portion around the starting point portion P4. For this reason, the part of the starting point part P4 is relatively depressed while the parts located on the left and right sides of the surroundings protrude, and the part of the starting point part P4 is surely recessed when the expansion is completed. Can do. Further, also in the airbag 100 of the seventh embodiment, the tether 121 for maintaining the recessed shape of the occupant protection part 22C in the airbag 100 at the completion of the inflation is disposed in the bag body 101. When the airbag 100 is completely inflated, it is preferable that the occupant protection portion 22C can be reliably recessed with the starting portion P4 as the center. In particular, in the airbag 100 according to the seventh embodiment, the tether 121 includes the lateral coupling portion 122 that couples the left side wall portion 15c and the right side wall portion 15d, the vicinity of the left and right centers of the lateral coupling portion 122, and the occupant protection portion 22C. Since the configuration includes the vertical connection portion 123 that connects the vicinity of the left and right centers, the lateral connection portion 122 can also regulate the left and right width dimensions of the bag body 101 when the inflation is completed. It is possible to suppress an increase in the volume at the completion of expansion.

  And in the airbag 100 of 7th Embodiment, the passenger | crew side panel part 115 is divided into 2 right and left, and the stitching | suture part 126 along the up-down direction is arrange | positioned in the up-and-down whole area in the center of right and left of the rear side wall part 15e. Since the vertical connection portion 123 of the tether 121 is coupled to the vicinity of the suture site 126, the suture site 126 pulled forward by the tether 121 is recessed when the airbag 100 is completely inflated. Thus, the recess 24C is disposed over substantially the entire area above and below the occupant protection portion 22C. That is, in the airbag 100 of the seventh embodiment, the protrusions 23CL and 23CR disposed on the left and right sides of the recess 24C are also disposed over substantially the entire area above and below the occupant protection unit 22C. Even if the position of the occupant's head that interferes with the inflated airbag 100 moves up and down due to the sitting posture, the occupant's head can be softly received while suppressing the reaction force from the airbag 100. .

  Also in the airbag 100 of the seventh embodiment, as shown in FIG. 50, when the base fabric constituting the airbag 100 is cut from the large airbag fabric material 90D, the left panel portion 104 and the right panel portion 109 are cut. The occupant-side panel portion 115, the rectifying cloth materials 60AL and 60AR, the lateral connecting portion base fabrics 124 and 124, the vertical connecting portion base fabric 125, and the protective cloth 87 are arranged with a gap between them being suppressed. Therefore, the generation of the remaining material from the airbag fabric material 90D can be reduced, and the yield of the airbag fabric material 90D can be improved. Particularly, in the airbag 100 of the seventh embodiment, the occupant side panel portion 115 is divided into two pieces, that is, a left side portion 116 and a right side portion 117. In comparison, the yield can be further improved.

  Next, the airbag 129 of 8th Embodiment is demonstrated. As shown in FIGS. 51 to 53, the airbag 129 of the eighth embodiment includes a bag body 130, a rectifying cloth 55 </ b> A disposed in the bag body 130, and a tether that regulates the shape of the bag body 130 when the inflation is completed. 132. Since the shape of the airbag base fabric 102A is different, the bag main body 130 is slightly different from the airbag 15 of the first embodiment when it is inflated. Since the configuration is the same as that of the airbag 15 of the first embodiment, the same members are denoted by the same reference numerals with “D” added to the end of the members constituting the airbag 15 of the first embodiment. Description is omitted.

  In the airbag 129 of the eighth embodiment, a recessed portion 24D is formed so that the vicinity of the left and right centers of the upper end 22a side and the lower end 22b side of the occupant protection portion 22D at the time of completion of the inflation are greatly recessed, respectively. Two projecting portions 23DL and 23DR are disposed on the left and right sides of the. That is, in the airbag 129 of the eighth embodiment, the recess 24D and the protrusions 23DL and 23DR are formed over the entire area above and below the occupant protection part 22D. Specifically, the airbag 129 of the eighth embodiment is configured by sewing the peripheral edges of the airbag base fabric 102A to the vicinity of the center of the left and right of the occupant protection portion 22D on the upper end 22a side 3. A starting point P5 is formed in which the stitching portions 37D, 38DL, and 38DR of the book extend radially, and the peripheral edges of the airbag base fabric 102A are sewn to the left and right center portions on the lower end 22b side of the occupant protection portion 22D. A starting point P6 in which the three stitched portions 127A, 38DL, and 38DR configured in this manner extend radially is formed. And the recessed part 24D is comprised so that the passenger | crew protection part 22D may be recessed centering | focusing on these starting part P5, P6.

  The rectifying cloth 55A disposed in the bag main body 130 has the same configuration as the rectifying cloth 55A in the airbag 70 of the above-described fourth embodiment, and the same members are denoted by the same reference numerals for explanation. Omitted.

  Further, the airbag base fabric 102A constituting the bag body 130 in the airbag 129 of the eighth embodiment is the same as the airbag base fabric 102 in the airbag 100 of the seventh embodiment except that the outer shape is slightly different. Therefore, the description is omitted by using the same symbol with “A” at the end of the same member. In the airbag 129 of the eighth embodiment, starting point portions P5 and P6 are respectively formed on the upper end 22a side and the lower end 22b side of the occupant protection portion 22D when inflation is completed, and the airbag of the eighth embodiment In the bag base fabric 102A, the upper side portion 104da of the upper edge 104b and the rear edge 104d in the left panel portion 104A, and the upper side portion 109da of the upper edge 109b and the rear edge 109d in the right panel portion 109A are respectively around the starting point P5. The fan-shaped edge portions 114AUL and 114AUR that constitute the above are constructed. Further, the lower edge portion 104db of the lower edge 104c and the rear edge 104d in the left panel portion 104A, and the lower edge portion 109db and the lower side portion 109db of the rear edge 109d in the right panel portion 109A, respectively, form fan-shaped edges that form the periphery of the starting point portion P6. 114ADL and 114ADR.

  Also, in the airbag base fabric 102A that constitutes the airbag 129 of the eighth embodiment, the portion that forms the periphery of the starting portion P5 and is surrounded by the suture portions 37D, 38DL, and 38DR is based on the starting portion P5. The sum of the angles is configured to exceed 360 °. Specifically, as shown in FIG. 54, an intersection angle θ15 between the upper edge 104b and the rear edge 104d centered on the starting point P5 in the left panel 104A (the fan-shaped edge 114AUL in the left panel 104A, The angle θ16 between the upper edge 109b and the rear edge 109d centering on the starting point P5 in the right panel portion 109A (the fan-shaped edge portion 114AUR in the right panel portion 109A, That is, the angle of the portion 104e surrounded by the stitched portions 37D and 38DR and coincides with the intersection angle θ15) and the intersection angle θ17 of the outer edges 116a and 117a in the occupant side panel portion 115A (the outer edge 116a and the inner edge 116b in the left portion 116A). And the outer edge 117a and the inner edge of the right portion 117A. The sum of the intersection angle θ19 with the edge 117b and the sum of the angle of the portion 115a surrounded by the stitched portions 38DL and 38DR in the occupant side panel portion 115A (see FIG. 57B) exceeds 360 °. So that it is set. Further, in the airbag base fabric 102A constituting the airbag 129 of the eighth embodiment, the portion surrounding the starting point portion P6 and surrounded by the suture portions 127A, 38DL, 38DR is also based on the starting point portion P6. It is comprised so that the sum total of an angle may exceed 360 degrees. Specifically, as shown in FIG. 54, the intersection angle θ20 between the lower edge 104c and the rear edge 104d centering on the starting point P6 in the left panel 104A (the fan-shaped edge 114ADL in the left panel 104A, The angle θ21 between the lower edge 109c and the rear edge 109d centering on the starting point P6 in the right panel portion 109A (the fan-shaped edge portion 114ADR in the right panel portion 109A, That is, the angle of the portion 104f surrounded by the suture portions 127A and 38DR and coincides with the intersection angle θ20) and the intersection angle θ22 of the outer edges 116a and 117a in the occupant side panel portion 115A (the outer edge 116a and the inner edge 116b in the left portion 116A). And the outer edge 117a of the right portion 117A. And the intersection angle θ24 between the inner edge 117b and the angle of the portion 115b surrounded by the suture portions 38DL and 38DR in the occupant side panel portion 115A (see FIG. 57B) is 360 °. It is set to exceed.

  The tether 132 has a structure in which two tether base fabrics 133 and 134 are connected in series in the front-rear direction. The front end 132b side is fixed to the case using a retainer (not shown) together with the peripheral edge 17D of the gas inflow port 18D. is there. The tether base fabric 133 located on the front side is formed in a belt shape that covers the peripheral edge 17D of the gas inlet 18D and extends rearward from the gas inlet 18D. The tether base fabric 134 located on the rear side has a substantially trapezoidal shape, and the rear end 134b on the wide bottom side is sewn to the rear side wall portion 15e, and the front end 134a is connected to the rear of the tether base fabric 133. It is the structure sewn on the end. And in the airbag 129 of 8th Embodiment, the rear part 133a located in the back of the gas inflow port 18D in the base fabric 133 for tethers is made into the crease | fold along a front-back in the vicinity of the center of right and left, and the rear end 133b The rear end 133b is sewn to the front end 134a of the tether base fabric 134 in a substantially triangular pyramid shape so as to extend substantially vertically. The tether base fabric 133 is formed with an opening 133c corresponding to the gas inlet 18D and an opening 133d corresponding to the mounting hole 19D.

  In addition, the airbag 129 of the eighth embodiment is a belt-like protection that protects the vicinity of the central portion before and after the suture portion 37C in order to prevent the inflation gas flowing into the interior from the gas inlet 18D from directly hitting the airbag 129. A cloth 136 is disposed along the stitched portion 37C so as to cover the inner peripheral side near the center before and after the stitched portion 37C (see FIG. 52). Further, similarly to the airbag 100 of the seventh embodiment, a protective cloth 87 and a reinforcing cloth 119 are disposed in the airbag 129 of the eighth embodiment. In addition, a substantially rectangular reinforcing patch portion projecting upward is formed in the vicinity of the starting point portion P5 in the left panel portion 104A and the right panel portion 109A of the airbag base fabric 102A constituting the airbag 129 of the eighth embodiment. 104g and 109g are formed. The reinforcing patch portions 104g and 109g are for reinforcing the portion of the starting point portion P5, similarly to the reinforcing patch 67 in the airbag 52 of the third embodiment described above.

  The airbag 129 of the eighth embodiment is manufactured as follows. The occupant side panel portion 115A has the left side portion 116A and the right side portion 117A in a state where the left side portion 116A and the right side portion 117A are flattened, and the tether base fabric 134 is disposed therebetween, and the peripheral edges are aligned with each other. Then, the rear end 134b is sewn using a suture to form a suture site 126A. Thereafter, as shown in FIGS. 55A and 55B, the left panel portion 104A and the right panel portion 109A are overlapped in a state where the left panel portion 104A and the right panel portion 109A are flattened so as to match each other, and are part of the fan-shaped edge portions 114ADL and 114ADR. The lower edges 104c and 109c are sewn together with a suture to form a suture site 127A. Thereafter, as shown in FIG. 55C and FIG. 56A, the left panel portion 104A and the right panel portion 109A are opened apart from each other so that the stitched portion 127A is arranged on the inner side, and the reinforcing cloth 119 and the rectifying cloth material are opened. 60AL, 60AR, tether base cloth 133, and protective cloth 87 are sequentially stacked, and at the peripheral edge 17D part of the gas inlet 18D and the peripheral part of the connecting part 61A in the flow regulating cloth material 60AL, 60AR, Using the suture thread, the reinforcing cloth 119, the rectifying cloth materials 60AL and 60AR, the tether base cloth 133, and the protective cloth 87 are sewn to the left panel part 104A and the right panel part 109A. Further, the left edge of the protective cloth 136 is sewn in the vicinity of the upper edge 104b in the left panel portion 104A. Thereafter, the gas inlet 18D and the mounting hole 19D are formed by drilling (see B in FIG. 56).

  Next, as shown in FIG. 57A, the left panel portion 104A and the right panel portion 109A are folded back at the stitched portion 127A so that the peripheral edges thereof coincide with each other, and each reinforcement in the left panel portion 104A and the right panel portion 109A is reinforced. The patch parts 104g and 109g are folded back so as to cover the part of the starting point part P5, and the upper edges 104b and 109b, which are part of the fan-shaped edge parts 114AUL and 114AUR, are sewn together using a suture thread, and a stitched part 37D is obtained. Form. As shown in FIGS. 57A and 57B, the rear edges 104d and 109d, which are the remaining portions of the fan-shaped edge portions 114AUL, 114AUR, 114ADL, and 114ADR in the left panel portion 104A and the right panel portion 109A, are formed in the occupant side panel portion 115A. The rear edges 104d and 109d are spread apart so as to be aligned with the outer edges 116a and 117a of the respective left side portions 116A and right side portions 117A while being folded along the fold line CL7 so that the suture portion 127A is positioned inside. The occupant side panel portion 115A widened so that the outer edges 116a and 117a are separated from each other is placed on the left side panel portion 104A and the right side panel portion 109A, and the rear edge 104d of the left side panel portion 104A is placed on the left side in the occupant side panel portion 115A. The outer edge 116a of the part 116A is sewn using a suture thread and sutured. Position to form a 38DL, edge 109d after the right panel section 109A by sewn to right portion 117A, forming a suture site 38DR. Next, the right edge of the protective cloth 136 is sewn near the upper edge 109b of the right panel portion 109A.

  After that, as shown in FIGS. 57B and 57C, the edges of the flow regulating fabric materials 60AL and 60AR are sewn together, and the rear end 133b of the tether base fabric 133 and the front end 134a of the tether base fabric 134 are sewn. The left side panel portion 104A and the right side panel portion 109A are reversed using a non-sewn portion so as not to be exposed to the outside, and then the left side panel portion 104A as shown in FIG. 57D. The airbag 129 can be manufactured by sewing the front edges 104a and 109a of the right panel portion 109A to form the stitched portion 39D.

  In the airbag base fabric 102A constituting the airbag 129 of the eighth embodiment, as shown in FIG. 57A, the folding line CL7 and the rear edge 104d (on the right panel portion 109A) 109d) is set to 90 ° or less, and an intersection angle β5 between the folding line CL7 and the upper edge 104b (109b) of the left panel 104A (right panel 109A) of the peripheral wall panel 103A is In order to support the airbag 129 at the completion of the inflation by the windshield located in front, the airbag 129 is set to exceed 90 °. In the airbag base fabric 102A constituting the airbag 129 of the eighth embodiment, as shown in FIG. 57A, the folding line CL7 and the lower edge 104c (109c) of the left panel portion 104A (right panel portion 109A). ) And the intersection angle α7 between the folding line CL7 and the rear edge 104d (109d) of the left panel portion 104A (right panel portion 109A) are both set to 90 ° or less. Also, in the airbag 129 of the eighth embodiment, the airbag base fabric 102A constituting the airbag 129 is left-right symmetrical, and the left side portion 116A and the right side portion 117A constituting the occupant side panel portion 115A. Since the outer edges 116a and 117a are shaped so as to follow the rear edge 104d and 109d of the left panel part 104A and the right panel part 109A constituting the peripheral wall panel part 103A, respectively, the edges are mutually connected during the sewing operation. Flat stitching can be performed in a state of being flattened and deployed, and stitching work becomes easy.

  Further, in the airbag 129 of the eighth embodiment, the inflation is completed so that the airbag 129 is recessed around the starting points P5 and P6, but the fan-shaped edge portions 114AUL and 114AUR in the peripheral wall panel portion 103A And the portion 115a of the occupant side panel portion 115A that constitutes the periphery of the starting point portion P5 is set so that the sum of the angles with respect to the starting point portion P5 exceeds 360 °, and the fan shape in the peripheral wall panel portion 103A The portion of the edge portions 114ADL, ADR and the portion 115b of the occupant side panel portion 115A that forms the periphery of the starting point portion P6 are set so that the sum of the angles with respect to the starting point portion P6 exceeds 360 °. Therefore, the fan-shaped edge portions 114AUL, 114AUR, 114ADL, and ADR and the periphery of the starting point portions P5 and P6 are configured. The parts 115a and 115b of the occupant side panel portion 115A each have a convex outer periphery, and the sewing operation for sewing the peripheral edges of these parts together becomes easy. Therefore, in the airbag 129 of the eighth embodiment, when the inflation is completed, the sewing operation for sewing the peripheral edges of the airbag base fabric 102A constituting the airbag 129 is easy even if the airbag 129 has the recess 24D. Therefore, the manufacturing man-hour and cost of the airbag 129 can be reduced.

  Also in the airbag 129 of the eighth embodiment, the portions 104e, 109e, 115a of the airbag base fabric 102A that form the periphery of the starting point portion P5 have angles θ15, θ16, θ17 with respect to the starting point portion P5. The sum is set to exceed 360 °, and the portions 104f, 109f, 115b of the airbag base fabric 102A that form the periphery of the starting point P6 have angles θ20, θ21, θ22 with respect to the starting point P6. Since the sum is set so as to exceed 360 °, the portions 104e, 109e, 115a of the airbag base fabric 102A constituting the periphery of the starting point portion P5 and the airbag for forming the periphery of the starting point portion P6 The portions 104f, 109f, and 115b of the base fabric 102A are each configured to form a surplus, and the surroundings of the starting points P5 and P6 Thus, the projecting portions 23DL and 23DR are formed by smoothly projecting the portion. For this reason, the parts of the starting parts P5 and P6 are relatively dented while the parts located on the left and right sides of the periphery protrude, and the parts of the starting parts P5 and P6 are surely secured when the expansion is completed. Can be recessed. Further, also in the airbag 129 of the eighth embodiment, the tether 132 for maintaining the recessed shape of the occupant protection part 22D in the airbag 129 when the inflation is completed is disposed in the bag body 130. When the inflation of the airbag 129 is completed, it is preferable that the occupant protection portion 22D can be surely recessed with the starting points P5 and P6 as the center.

  And in the airbag 129 of 8th Embodiment, the starting part P6 is arrange | positioned at the lower end 22b side of the passenger | crew protection part 22, and the starting part P6 is located in the site | part by the side of the lower end 22b in the passenger | crew protection part 22 at the time of completion of inflation. Since the recessed portion 24D that is recessed with respect to the center is formed, for example, even if the airbag is inflated in a state where the child seat with the head side arranged on the instrument panel side is set on the passenger seat, the head side of the child seat And it becomes an aspect which penetrate | invades between the site | part of this recessed part 24D, and an instrument panel, and it can suppress that the airbag which completed the inflation interferes with a child seat. Of course, when an interference object other than the child seat is arranged close to the instrument panel, like the head of the child seat, the airbag 129 that has completed the inflation is prevented from interfering with the interference object. Can do. In the eighth embodiment, the starting points P5 and P6 are arranged on both the upper end 22a side and the lower end 22b side of the occupant protection part 22D. Of course, the starting point part is an occupant protection part as an airbag. You may use the thing of the structure arrange | positioned only at the lower end side.

  Further, in the airbag 129 of the eighth embodiment, the occupant side panel 115A is provided on the left and right sides of the occupant protection part 22D at the time of completion of the inflation, with the origins P5 and P6 provided on the upper end 22a side and the lower end 22b side, respectively. The stitching part 126A along the vertical direction is arranged in the upper and lower whole areas at the center of the left and right sides of the rear side wall portion 15e, and the tether 132 is coupled to the vicinity of the center of the stitching part 126A. Therefore, when the airbag 129 is completely inflated, the stitching portion 126A pulled forward by the tether 132 becomes a starting point of the recess, and the recess 24D moves the occupant protection portion 22D up and down. It is formed over substantially the entire upper and lower regions so as to be recessed substantially uniformly. In other words, in the airbag 129 of the eighth embodiment, the protrusions 23DL and 23DR arranged on the left and right sides of the recess 24D are also arranged so that the protrusion amounts are substantially uniform in the vertical direction and are arranged over substantially the entire upper and lower regions. Even if the position of the occupant's head that interferes with the inflated airbag 129 moves up and down due to the physique and seating posture of the occupant, the occupant's head is softly received while suppressing the reaction force from the airbag 129 be able to.

  In the eighth embodiment, the tether 132 is configured to extend from the rear of the gas inlet 18D. However, as shown in the airbag 129A of FIG. 58, the tether 132A is formed from the front of the gas inlet 18D. You may use what was arrange | positioned so that it might extend. In this tether 132A, a substantially triangular pyramid-shaped tether base fabric 133A arranged in front covers the upper side of the gas inlet 18D, and the expansion gas G flowing in from the gas inlet 18D is supplied to the tether base fabric. By 133A, it can rectify | straighten so that it may flow toward the front-back direction, and it becomes possible to abbreviate | omit a rectifying cloth. Further, the connection position on the front end side of the tether is not limited to this, and as shown by a two-dot chain line in FIG. The front end side of the tether 132C may be coupled together with the stitching portion 39C on the front side of the gas inflow port 18C as shown by a two-dot chain line in FIG. It is good also as a structure to connect.

  Further, in the airbag 93 of the sixth embodiment, as shown by 100, the lateral connection portion 95 of the tether 94 is positioned such that the front side in the width direction is positioned upward and the rear side is positioned downward. In the airbag 100 of the seventh embodiment, the lateral connecting portion 122 of the tether 121 is disposed so that the width direction is substantially along the horizontal direction. The arrangement direction of the horizontal connecting portion is not limited to this, and for example, as shown by the two-dot chain line in FIG. 35, the horizontal connecting portion 95A may be arranged so that the width direction is substantially along the vertical direction. Good. Further, in the airbags 93 and 100 of the embodiment, the rectifying cloth 55A is disposed in the bag main bodies 71 and 101, and the inflation gas flowing in from the gas inlets 18B and 18C is rectified by the rectifying cloth 55A. However, in the case of an airbag in which the rectifying cloth is not disposed, the inflation gas flowing into the interior from the gas inlets 18B and 18C is also moved back and forth by the lateral coupling portions 95 and 122 of the tethers 94 and 121. It can be rectified to branch off. If it is not desirable to impart a rectifying action to the tether horizontal connecting portion, a large number of through holes 122d are formed in the horizontal connecting portion 122 and expanded from the through holes 122d as shown by the two-dot chain line in FIG. It is good also as a structure which can flow out the working gas.

  In the embodiment, the airbags 15, 40, 52, 70, 70A, 93, 100, and 129 have a bilaterally symmetric shape at the time of completion of inflation. However, as shown by a two-dot chain line in FIG. The completed shape may be, for example, a left-right asymmetric shape in which the shape of the sutured part 38CR is changed so that the protruding portion 23CR protrudes larger than the protruding portion 23CL. In this way, when the inflation completion shape of the airbag is left-right asymmetric, as shown by a two-dot chain line in FIG. 46, the rear edge 109d of the right panel portion 109 in the airbag base fabric 102 and the outer edge of the right portion 117 117a and the rear edge 104d of the left panel part 104 and the outer edge 116a of the left part 116 are curved so as to increase the amount of protrusion, the rear side of the protruding part of the airbag when the inflation is completed can be easily performed. The amount of protrusion can be changed.

  In the embodiment, the airbag base fabrics 27, 27A, 41, 72, 102, and 102A are sewn together using a suture thread, so that the airbags 15, 40, 52, 70, 70A, 93, 100, and 129 are formed, but the means for connecting the peripheral edges of the base fabric is not limited to this, and for example, the peripheral edges of the base fabric are joined together using an adhesive or the like, and the air A bag may be formed.

It is sectional drawing of the vehicle front-back direction of the airbag apparatus for passenger seats using the airbag for passenger seats which is 1st Embodiment of this invention. It is the perspective view seen from the front side of the state where the airbag of a 1st embodiment was inflated alone. It is the perspective view seen from the back side of the state where the airbag of a 1st embodiment was inflated alone. It is sectional drawing along the front-back direction of the state which expanded the airbag of 1st Embodiment alone. It is sectional drawing of the state which expanded the airbag of 1st Embodiment alone, and respond | corresponds to the VV site | part of FIG. It is a top view which shows the base fabric for airbags which comprises the airbag of 1st Embodiment. It is the schematic which shows the aspect which the protrusion part in the airbag of 1st Embodiment swells. It is the schematic which shows the manufacturing process of the airbag of 1st Embodiment. It is a figure explaining the use condition of the airbag of a 1st embodiment, and it is the figure seen from the vehicles back side which shows the state where inflation was completed. It is a figure explaining the use condition of the airbag of a 1st embodiment, and it is the figure seen from the side of vehicles which shows the state where inflation was completed. It is a top view which shows the base fabric for airbags which comprises the airbag of 2nd Embodiment of this invention. It is the schematic which shows the manufacturing process of the airbag of 2nd Embodiment using the base fabric for airbags shown in FIG. It is the perspective view seen from the back side of the state which inflated the airbag of 2nd Embodiment manufactured using the base fabric for airbags shown in FIG. 11 alone. It is sectional drawing along the front-back direction of the state which expanded the airbag of 2nd Embodiment alone. It is the perspective view seen from the back side of the state where the air bag of a 3rd embodiment of the present invention was inflated alone. It is sectional drawing along the front-back direction of the state which expanded the airbag of 3rd Embodiment alone. It is sectional drawing of the state which expanded the airbag of 3rd Embodiment alone, and respond | corresponds to the XVII-XVII site | part of FIG. It is a top view which shows the member which comprises the airbag of 3rd Embodiment. It is the schematic which shows the manufacturing process of the airbag of 3rd Embodiment. It is the schematic which shows the manufacturing process of the airbag of 3rd Embodiment, and is a figure which shows the process after FIG. It is the perspective view seen from the back side of the state where the airbag of a 4th embodiment of the present invention was inflated alone. It is sectional drawing along the front-back direction of the state which expanded the airbag of 4th Embodiment alone. It is sectional drawing of the state which expanded the airbag of 4th Embodiment alone, and respond | corresponds to the XXIII-XXIII site | part of FIG. It is a top view which shows the member which comprises the airbag of 4th Embodiment. It is the schematic which shows the manufacturing process of the airbag of 4th Embodiment. It is the schematic which shows the manufacturing process of the airbag of 4th Embodiment, and is a figure which shows the process after FIG. It is the schematic which shows the manufacturing process of the airbag of 4th Embodiment, and is a figure which shows the process after FIG. It is a figure which shows the arrangement | positioning state at the time of cutting each member which comprises the airbag of 4th Embodiment from the fabric material for airbags. It is a top view which shows the member which comprises the airbag of 5th Embodiment of this invention. It is the schematic which shows the manufacturing process of the airbag of 5th Embodiment. It is the schematic which shows the manufacturing process of the airbag of 5th Embodiment, and is a figure which shows the process after FIG. It is the schematic which shows the manufacturing process of the airbag of 5th Embodiment, and is a figure which shows the process after FIG. It is a figure which shows the arrangement | positioning state at the time of cutting each member which comprises the airbag of 5th Embodiment from the fabric material for airbags. It is the perspective view seen from the back side of the state where the air bag of a 6th embodiment of the present invention was inflated alone. It is sectional drawing along the front-back direction of the state which expanded the airbag of 6th Embodiment alone. It is sectional drawing of the state which expanded the airbag of 6th Embodiment alone, and respond | corresponds to the XXXVI-XXXVI site | part of FIG. It is a top view which shows the member which comprises the airbag of 6th Embodiment. It is the schematic which shows the manufacturing process of the airbag of 6th Embodiment. It is the schematic which shows the manufacturing process of the airbag of 6th Embodiment, and is a figure which shows the process after FIG. It is the schematic which shows the manufacturing process of the airbag of 6th Embodiment, and is a figure which shows the process after FIG. It is a figure which shows the arrangement | positioning state at the time of cutting each member which comprises the airbag of 6th Embodiment from the fabric material for airbags. It is a top view which shows the member which comprises the airbag which is a modification of 6th Embodiment. It is the perspective view seen from the back side of the state where the airbag of a 7th embodiment of the present invention was inflated alone. It is sectional drawing along the front-back direction of the state which expanded the airbag of 7th Embodiment alone. It is sectional drawing of the state which expanded the airbag of 7th Embodiment alone, and respond | corresponds to the XXXXV-XXXXV site | part of FIG. It is a top view which shows the member which comprises the airbag of 7th Embodiment. It is the schematic which shows the manufacturing process of the airbag of 7th Embodiment. It is the schematic which shows the manufacturing process of the airbag of 7th Embodiment, and is a figure which shows the process after FIG. It is the schematic which shows the manufacturing process of the airbag of 7th Embodiment, and is a figure which shows the process after FIG. It is a figure which shows the arrangement | positioning state at the time of cutting each member which comprises the airbag of 7th Embodiment from the fabric material for airbags. It is the perspective view seen from the back side of the state where the air bag of an 8th embodiment of the present invention was inflated alone. It is sectional drawing along the front-back direction of the state which expanded the airbag of 8th Embodiment alone. It is sectional drawing of the state which expanded the airbag of 8th Embodiment alone, and respond | corresponds to the XXXXXIII-XXXXXIII site | part of FIG. It is a top view which shows the member which comprises the airbag of 8th Embodiment. It is the schematic which shows the manufacturing process of the airbag of 8th Embodiment. It is the schematic which shows the manufacturing process of the airbag of 8th Embodiment, and is a figure which shows the process after FIG. It is the schematic which shows the manufacturing process of the airbag of 8th Embodiment, and is a figure which shows the process after FIG. It is sectional drawing along the front-back direction of the state which expanded the airbag which shows the modification of a tether alone.

Explanation of symbols

15, 40, 52, 70, 70A, 93, 100, 129 ... airbags,
15a ... upper side wall,
15b ... lower side wall,
15c ... left side wall,
15d ... right side wall,
15e ... rear side wall,
18, 18A, 18B, 18C, 18D ... gas inlet,
22, 22A, 22B, 22C, 22D ... passenger protection part,
22a ... upper end,
23L, 23R, 23AL, 23AR, 23BL, 23BR, 23CL, 23CR, 23DL, 23DR ... projecting portion,
24, 24A, 24B, 24C, 24D ... concave portion,
27, 27A, 41, 72, 102, 102A ... a base fabric for an air bag,
28, 28A, 42, 73, 103, 103A ... peripheral wall panel,
34L, 34R, 48L, 48R, 83L, 83R, 114L, 114R114AUL, 114AUR, 114ADL, 114ADR ... Fan-shaped edge,
35, 35A, 49, 84, 115, 115A ... passenger panel,
37, 37A, 37B, 37C, 37D ... suture sites,
38L, 38R, 38AL, 38AR, 38BL, 38BR, 38CL, 38CR, 38DL, 38DR ... suture site,
58, 94, 121, 132 ... tether,
74, 104, 104A ... left panel,
79, 109, 109A ... right side panel,
P1, P2, P3, P4, P5, P6 ... starting point part,
M ... Airbag device for passenger seat.

Claims (5)

Folded to the top side of the instrument panel in front of the passenger seat of the vehicle and protrudes upward when the inflation gas flows in, and between the top surface of the instrument panel and the windshield above the instrument panel It is configured to expand and expand to the rear side of the vehicle so as to close it,
A gas inflow port for inflating gas is provided near the center in the left-right direction on the lower surface of the front end when the inflation is completed, and it is possible to receive a passenger seated in the passenger seat at the position on the rear side when the inflation is completed And is configured to include an occupant protection unit,
The shape at the time of completion of expansion is a substantially quadrangular pyramid shape with the apex arranged on the front end side, and the left and right side wall portions arranged substantially along the front-rear direction on both the left and right sides, and substantially left and right on both the upper and lower sides An upper side wall part and a lower side wall part arranged along the direction, and a rear side wall part arranged substantially along the left-right direction so as to connect the upper side wall part and the lower side wall part on the passenger side, In a passenger seat airbag having a configuration comprising:
The airbag includes a peripheral wall panel portion constituting a portion of the left side wall portion, the right side wall portion, the upper side wall portion, and the lower side wall portion, and an occupant side panel portion constituting the rear side wall portion. The peripheral edges of the airbag base fabric that is made symmetrical are configured to be joined in a flatly deployed state,
When the airbag is inflated, a portion near the center of the left and right sides of at least one of the upper end side and the lower end side of the occupant side panel portion is used as a starting portion, and the three connecting portions extend radially from the starting portion. The peripheral wall panel portion coupled to the occupant side panel portion around the starting point portion includes two fan-shaped edges,
The starting portion of each of the fan-shaped edge portions in the peripheral wall panel portion constituting the periphery of the starting portion portion of the airbag fabric, and the portion of the occupant side panel portion, sandwiched between the joint portions. Is set so that the sum of the angles with reference to exceeds 360 °,
An airbag for a passenger seat, wherein the airbag is configured to complete inflation so as to be recessed with the starting portion as a center. As the configuration in which the starting point portion is formed on one of the upper end side or the lower end side of the occupant protection portion in the airbag at the time of completion of inflation,
The airbag fabric is
The peripheral wall panel portion that is symmetrical with the upper and lower side wall portions or the lower side wall portion as the center on the left and right sides so that the fan-shaped edge portion is positioned on both the left and right edge sides;
The left-right symmetrical passenger side panel portion configured to extend from the rear edge of the peripheral wall panel portion with the left and right centers aligned with the left and right centers of the peripheral wall panel portion,
The passenger-side airbag according to claim 1, wherein the passenger-side airbag is configured as a single sheet including the airbag. The airbag fabric is
The left and right panels are symmetrical with each other and divided into a left and right center of the upper side wall and a left and right center of the lower side wall, respectively, and are provided with the fan-shaped edges, respectively. A peripheral wall side panel part composed of two pieces with a part,
One occupant side panel portion that is symmetric, and
The passenger-side airbag according to claim 1, wherein the passenger-side airbag is configured as three pieces. In the airbag, a tether for maintaining the recessed shape of the occupant protection portion in the airbag at the time of completion of inflation is disposed,
The tether is formed as a single band and is disposed so as to connect the vicinity of the left and right center of the occupant protection part and the vicinity of the gas inflow port when the inflation is completed. The passenger seat airbag according to any one of claims 1 to 3. In the airbag, a tether for maintaining the recessed shape of the occupant protection portion in the airbag at the time of completion of inflation is disposed,
The tether
A band-like lateral connecting portion that connects the left side wall and the right side wall at the time of completion of expansion;
A belt-like vertical connection part that connects the vicinity of the left and right centers of the lateral connection part and the vicinity of the left and right centers of the occupant protection part;
The airbag for a passenger seat according to any one of claims 1 to 3, wherein the airbag is configured as described above.

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