JP5012725B2 - Head protection airbag device - Google Patents

Description

  The present invention relates to a head protecting airbag device in which an inflating gas flows in and expands and inflates so as to cover the inside of a vehicle window and can protect the head of an occupant seated in the vehicle.

2. Description of the Related Art Conventionally, in a head protection airbag device, the lower edge of the airbag is positioned at the bottom of the vehicle when the airbag has been inflated so that the head of the occupant is properly protected even when the vehicle falls (rollover). The structure located in the downward side rather than the position (belt line) of the lower end of a window is proposed (for example, refer patent document 1).
JP 2001-328503 A

  In the conventional head protection airbag device, it is possible to suppress the passenger's head from being exposed to the outside of the vehicle, but it is possible to prevent the passenger's head from sliding downward (door trim side). Therefore, the configuration is not sufficient. In other words, if the head of the occupant slips downward and reaches the lower side of the protective inflating portion of the airbag, the vehicle is outside the range of the effective protection area by the protective inflating portion of the airbag, There is a possibility that it will be in direct contact with the inner components (door trim, etc.).

  The present invention solves the above-described problems, and an object of the present invention is to provide a head protection airbag device that suppresses an occupant's head from slipping excessively downward (door trim side).

A head protection airbag device according to the present invention is housed by being folded and housed on an upper edge side of a window inside a vehicle, and having an upper edge side fixed to the vehicle body side and having a protective inflating portion. A head protecting airbag device comprising an airbag capable of covering the window in an inflated state,
In a state where the airbag has been inflated, an auxiliary inflating portion that is inflated adjacent to the inner side of the protecting portion on the lower side of the protecting portion, and at least a portion on the upper side of the auxiliary inflating portion, A protective inflating part is separated from the protective inflating part, and a recess or a gap is formed at a position between the protective inflating part and the auxiliary inflating part, and the protective inflating part and the auxiliary inflating part are provided. The communication part is provided, and the communication part is disposed below the upper end part of the auxiliary expansion part.

Therefore, even if the occupant's head slides downward (door trim side), the occupant's head is caught in a recess or gap formed in a portion between the protective expansion part and the auxiliary expansion part. The occupant's head is further prevented from sliding downward. That is, the passenger's head is prevented from sliding excessively downward. Therefore, when the occupant's head slides downward, the occupant's head is prevented from reaching the lower side of the airbag's protective inflating portion. The state of being in direct contact with a vehicle interior component (door trim, etc.) outside the range of the effective protection area by the part will be avoided and in the part between the protective expansion part and the auxiliary expansion part It becomes possible to reliably form the recess or gap.

  Further, in the head protection airbag device according to the present invention, the communicating portion communicates the lower end side of the protective inflating portion and the lower end side of the auxiliary inflating portion, and the airbag is deployed in a planar shape. The protective portion, the communication portion, and the auxiliary expansion portion are integrally formed, and are formed by bending the communication portion as a bending portion.

  Therefore, it is possible to arrange the auxiliary inflating portion with a relatively simple configuration.

  Moreover, in the head protection airbag device according to the present invention, the upper end portion of the auxiliary inflatable portion is disposed above the lower end portion of the window when the airbag has been inflated.

  Therefore, it is suppressed that a passenger | crew's head slips below the position of the lower end of a window.

  As described above, in the head protection airbag device according to the present invention, the occupant's head is prevented from sliding downward from the position of the lower end of the window, and is assisted with a relatively simple configuration. It is possible to dispose an inflating portion, and further, a recess or a gap in a portion between the protective inflating portion and the auxiliary inflating portion can be reliably formed. Even if it is slipping, the occupant's head will be caught in a recess or gap formed in the portion between the protective inflating part and the auxiliary inflating part, and the occupant's head will slide further downward It is suppressed. That is, the passenger's head is prevented from sliding excessively downward. Therefore, when the occupant's head slides downward, the occupant's head is prevented from reaching the lower side of the airbag's protective inflating portion. A state of being in direct contact with a vehicle interior component (such as a door trim) outside the range of the effective protection area by the portion is avoided.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  The structure of 1st Embodiment is demonstrated based on FIGS. 1-8. As shown in FIG. 1, the head protection airbag apparatus M of the first embodiment includes an airbag 19, an inflator 13, an airbag mounting bracket 10, an inflator mounting bracket 14, and an airbag cover 8. And is mounted on the upper side of the left and right side surfaces of the vehicle V. Although FIG. 1 shows the head protection airbag device M mounted on the vehicle inner side and the upper side in the right side surface portion of the vehicle V, the same applies to the vehicle inner side and the upper side in the left side surface portion of the vehicle V. The head protection airbag device is mounted. Note that the front, rear, left, and right directions in this specification are the forward direction of the vehicle as viewed from the occupant MP seated in the normal state inside the vehicle V unless otherwise specified. The reverse direction is the rear, the right hand side of the occupant MP is right, the left hand side of the occupant MP is left, the ceiling (roof or roof) side of the vehicle V is up, and the floor (floor) side of the vehicle V is Is below.

  The airbag 19 has a rear pillar portion on the upper edge side of windows (side windows) W1 and W2 disposed on the side surface portion of the vehicle V from the lower edge side of the front pillar portion FP through the lower edge side of the roof side rail portion RR. It is folded and stored over the upper side of the RP. In addition, the window arrange | positioned at the front side in the side part of the vehicle V is made into the front side window W1, and the window arrange | positioned at the rear side in the side part of the vehicle V is made into the rear side window W2.

  As shown in FIGS. 1, 6, and 7, the airbag cover 8 includes a front pillar garnish 4 disposed in the front pillar portion FP and a roof head lining 5 disposed in the roof side rail portion RR, respectively. It is comprised from lower edge part 4a * 5a. The front pillar garnish 4 and the roof head lining 5 are made of synthetic resin, and are respectively attached to the vehicle inner side of the inner panel 2 on the body 1 side of the vehicle V at the front pillar portion FP and the roof side rail portion RR. Fixed. Further, the airbag cover 8 is disposed so as to cover the inside of the airbag 19 that is folded and stored, and in order to allow the airbag 19 when deployed and inflated to protrude into the vehicle interior I, It is configured to be pushed by the bag 19 and open to the inside of the vehicle. In addition, as a part arrange | positioned in the roof side rail part RR as the airbag cover 8, it is good also as a structure which uses the roof side rail garnish separate from the roof headlining 5. FIG.

  The inflator 13 supplies the inflation gas G to the airbag 19, and has a substantially cylindrical cylinder shape as shown in FIG. Further, the inflator 13 is provided with a gas discharge port (not shown) capable of discharging the inflation gas G on the tip end side of the cylinder. The inflator 13 is a clamp that is mounted on the rear end portion 27a side of the gas inlet portion 27 in a state where the front end side including the gas discharge port is inserted into a gas inlet portion 27 (to be described later) of the airbag 19. 16 is connected to the airbag 19. The inflator 13 uses an inflator mounting bracket 14 for holding the inflator 13 and an inflator mounting bolt 15 for attaching and fixing the inflator mounting bracket 14 to the inner panel 2 on the body 1 side. 2 is attached and fixed at a position above the rear window W2.

  Each airbag mounting bracket 10 is composed of two sheet metal plates. As shown in FIG. 7, each airbag mounting bracket 10 is attached so as to sandwich mounting sections 38 and 47 (to be described later) of the airbag 19. The mounting portions 38 and 47 are attached to the inner panel 2 by using the airbag mounting bolts 11 and fixed to the inner panel 2.

  As shown in FIGS. 1, 6, and 7, the airbag 19 flows in the inflation gas G supplied from the inflator 13, expands from the folded state, and opens the windows W <b> 1 and W <b> 2 and the center pillar. The center pillar garnish 6 of the part CP and the rear pillar garnish 7 of the rear pillar part RP are deployed so as to cover the inside of the vehicle, and the expansion is completed. As shown in FIGS. 2 to 4, the airbag 19 has a protective portion 20 that covers the vehicle interior side of the windows W <b> 1 and W <b> 2 when the inflation is completed, and a lower portion on the lower end portion 20 b side of the protective portion 20. It is set as the structure provided with the auxiliary expansion part 21 expanded adjacent to the vehicle inside. When the expansion is completed, the protection unit 20 can cover a portion from the front window W1 through the center pillar portion CP and the rear window W2 to the front edge side of the rear pillar portion RP. It is made into the substantially rectangular shape along the front-back direction. In the side surface portion of the vehicle V, the components are arranged in the order of the front pillar portion FP, the front window W1, the center pillar portion CP, the rear window W2, and the rear pillar portion RP from the front side to the rear side. Yes.

  Further, as shown in FIGS. 6 and 7, the protection unit 20 is configured so that the lower end portion 20 b side when the vehicle V is completed when the vehicle V is viewed from the side is the lower end portions W1 a and W2 a of the windows W1 and W2 in the vehicle interior I. The width dimension in the vertical direction is set so as to overlap the belt line BL composed of Specifically, when the airbag 19 is completely inflated, the lower end 20b of the protection unit 20 is positioned below the belt line BL (the lower ends of the windows W1 and W2). In other words, when the inflation of the airbag 19 is completed, the airbag 19 includes the lower end portion 20b of the protection portion 20 and the upper side of the lower end portion 20b and the belt line BL (the lower end portions of the windows W1 and W2). W1a and W2a) are set so as to overlap (overlap) the components (door trim T and the like) on the side surface in the vehicle interior I of the vehicle V, which are arranged below W1a and W2a).

  As shown in FIGS. 2 and 6, the auxiliary inflating portion 21 is formed into a rod shape substantially in the front-rear direction when the inflating is completed. It is set to be approximately the same as the size. Further, when the vehicle V is viewed from the side, an upper end portion 21 a that is an upper end portion of the auxiliary inflating portion 21 is set to be positioned above the belt line BL. The part 21b is set to be positioned below the belt line BL. In other words, when the airbag 19 is completely inflated, the upper end portion 21a of the auxiliary inflatable portion 21 is disposed above the lower end portions W1a and W2a that are the lower end portions of the windows W1 and W2. It is installed. Therefore, although the details will be described later, the head H of the occupant MP is prevented from slipping downward from the lower ends W1a and W2a that are the positions of the lower ends of the windows W1 and W2. Further, since the lower end portion 21b of the auxiliary inflatable portion 21 is set to be positioned below the belt line BL, the lower end portion 20b of the protective portion 20 in the airbag 19 is set at the completion of the inflation of the airbag 19. In addition, the structure of the side part in the vehicle interior I of the vehicle V arrange | positioned below the site | part above the lower end part 20b, and the belt line BL (lower end part W1a * W2a of window W1 * W2). The door trim T and the like overlap (overlap), and the window W1 and W2 break when the vehicle V falls, and the airbag 19 obtained by the presence of the windows W1 and W2 does not move to the outside of the vehicle. Even if the supporting effect to be lost disappears, the component of the side portion (door trim T or the like) in the vehicle interior I of the vehicle V is overlapped with the airbag 19, Airbag 19 so that the supporting effect to not move the vehicle exterior is maintained. If the upper end portion 21a of the auxiliary inflating portion 21 is set to be positioned above the belt line BL, excessive movement of the occupant MP to the lower side of the head H is suppressed. If the above-described supporting effect for preventing the airbag 19 from moving to the outside of the vehicle is not taken into consideration, the lower end portion 21b of the auxiliary inflating portion 21 is not necessarily set to be positioned below the belt line BL. good. Further, if the lower end portion 21b of the auxiliary inflating portion 21 is set to be positioned below the belt line BL, the above-described supporting effect for preventing the airbag 19 from moving to the outside of the vehicle is maintained. Therefore, if the amount of movement of the occupant MP to the lower side of the head H is not taken into account, the upper end portion 21a of the auxiliary inflating portion 21 does not necessarily need to be set to be positioned above the belt line BL. .

  As shown in FIG. 5, the airbag 19 includes an airbag component member 23 in which a protective portion 20 and an auxiliary inflating portion 21 are arranged in series along the vertical direction and deployed in a planar shape. The part 21 is bent at the boundary portion 34 between the protective part 20 and the auxiliary inflating part 21 so as to be located on the inner side of the vehicle, and is coupled to the protective part 20 side at a position on the upper end part 21a side of the auxiliary inflating part 21 ,It is configured. In other words, the airbag 19 is configured such that the protection part 20 and the auxiliary inflating part 21 are connected to each other by the lower end parts 20b and 21b that are the lower end side on the lower side when the inflation is completed. And the auxiliary inflating portion 21 are formed integrally from an airbag constituting member 23 having a substantially rectangular outer shape. This airbag component member 23 is manufactured by bag weaving using polyamide yarn or the like for the shape (cell pattern) of the protective inflatable portion 32 of the protective portion 20 and the shape (cell pattern) of the auxiliary inflatable portion 21. However, it is good also as manufacturing by superposing | polymerizing two base fabrics and couple | bonding a required site | part by sewing or adhesion | attachment. As shown in FIG. 2, the auxiliary inflatable portion 21 is coupled to the protective portion 20 side at the three portions of the protective portion 20, that is, both the front and rear end sides and the vicinity of the front and rear center.

  As shown in FIGS. 2 to 5, the airbag 19 (airbag component member 23) includes a vehicle interior side wall portion 25 a disposed on the vehicle interior side and a vehicle exterior wall portion 25 b disposed on the vehicle exterior side when the inflation is completed. The gas inflow part 25 that expands by allowing the expansion gas G from the inflator 13 to flow inside and expands, and the gas non-inflow part 36 that does not expand without flowing the expansion gas G are separated. ing. The gas inflow portion 25 is a first inflatable portion 32 as a protective inflatable portion 32 that is juxtaposed along the front-rear direction when the inflation of the airbag 19 is completed. The first head protection unit 29 and the second head protection unit 30, the auxiliary expansion unit 21, and the communication unit 33 that allows the protection expansion unit 32 and the auxiliary expansion unit 21 to communicate with each other. Since the auxiliary inflating portion 21 is mounted on the vehicle V in a state bent to the inside of the vehicle with respect to the protective portion 20, when the airbag 19 is completely inflated, the auxiliary inflating portion 21 is arranged continuously from the vehicle interior side wall portion 25a. The wall portion provided is arranged on the vehicle outer side or the upper side, and the wall portion arranged continuously from the vehicle outer side wall portion 25b in the protection unit 20 is arranged on the vehicle inner side or the lower side. Will be.

  The gas supply path portion 26 extends to the upper end portion 20a side above the protection portion 20 in the gas inflow portion 25 (in other words, over the entire front and rear direction of the protection portion 20 (in other words, the airbag component member 23). The inflation gas G discharged from the inflator 13 is disposed below the gas supply path portion 26 on the upper edge side, which is the upper side of the airbag component member 23, over the substantially entire region in the front-rear direction of the airbag component member 23. It is the structure guided to the 1st head protection part 29 and the 2nd head protection part 30 which are arrange | positioned by the side. A gas inlet 27 connected to the inflator 13 is connected to the gas supply passage 26 at a position slightly shifted rearward from the front and rear centers in the gas supply passage 26. It arrange | positions so that it may protrude from the path part 26 upward. The gas inflow port portion 27 opens the rear end portion 27a side which is the rear side. And the gas inflow port part 27 will be connected with the inflator 13 using the clamp 16 in the state of being sheathed by the inflator 13.

  As shown in FIG. 6, the first head protecting portion 29 that forms the protective inflating portion 32 is disposed on the side of the front seat when the airbag 19 is completely inflated. The portion of the front window W1 excluding the vicinity of the front end of the front window W1 (in other words, the portion covered by the mounting portion 47 described later and the upper and lower portions not covered by the mounting portion 47 from the side portion. The vehicle interior is covered so as to cover a part (in other words, a part on the rear side when the front window W1 is divided into about half in the front-rear direction). As shown in FIG. 6, the second head protecting part 30 that forms the protective inflating part 32 is disposed on the side of the rear seat when the airbag 19 is completely inflated. Covering the inside of the vehicle from this part to the part that is about half of the rear side of the rear window W2 (in other words, the part of the rear side when the rear window W2 is divided into about half in the front-rear direction) It is configured.

  The first head protecting part 29 and the second head protecting part 30 are configured by arranging a plurality of vertical cells 31 that expand in a rod shape substantially along the vertical direction along the front-rear direction. Each vertical cell 31 is partitioned by a vertical partition section 40 described later. The 1st head protection part 29 is comprised from the three vertical cells 31 (31A * 31B * 31C), and the 2nd head protection part 30 is comprised from the two vertical cells 31 (31D * 31E). In other words, each vertical cell 31 forms a protective expansion part 32 in the protective part 20. In addition, each vertical cell 31 communicates directly with the gas supply path portion 26 at the upper end portion 31a side which is the upper side, and communicates with the auxiliary expansion portion 21 at the lower end portion 31b side which is the lower side. It communicates via the part 33. Each vertical cell 31 has a configuration in which the lower end portion 31 b is partitioned from each other by the vertical partitioning portion 40 in the region of the protection unit 20.

  The communication portion 33 that allows the protection portion 20 and the auxiliary expansion portion 21 to communicate with each other is provided at each lower end portion 31 b of each vertical cell 31 in the first head protection portion 29 and the second head protection portion 30 that form the protection expansion portion 32. The horizontal partition 41 described later and the plate-shaped portion 43 described later are formed to extend forward and backward from the lower end portion 40a side of the vertical partition 40 dividing each vertical cell 31. It is configured to be surrounded by a laterally extending portion 44 extending from the lower end portion 43a side in the front-rear direction and a peripheral edge portion 37 described later. Specifically, as shown in FIG. 5, on the lower side of each of the vertical cells 31A and 31E respectively arranged on the front end side of the first head protection unit 29 and the rear end side of the second head protection unit 30. The formed communication portions 33A and 33E are formed from the peripheral edge portion 37 constituting the outer peripheral edge of the airbag constituting member 23 and the lower end portions 40a of the vertical partition portions 40 (40A and 40C) to the front side or the rear side. It is comprised as a site | part which becomes between each horizontal division part 41A * 41F extended. Further, the communication portions 33C and 33D formed on the lower side of the vertical cells 31C and 31D respectively disposed on the rear end side of the first head protection portion 29 and the front end side of the second head protection portion 30 are The horizontal extending portions 44 (44F and 44B) extending from the lower end 43a side of the plate-like portion 43 to the front side or the rear side, and the lower end portions 40a side of the vertical partition portions 40 (40B and 40C). It is comprised as a site | part which becomes between each horizontal division part 41D * 41E extended from the front side or the back side. And the communication part 33B formed in the downward side of the vertical cell 31B arrange | positioned in the center of the 1st head protection part 29 is each vertical division part 40 (40A * 40B) arrange | positioned at the front and back both sides of the vertical cell 31B. It is comprised as a site | part which becomes between each horizontal division part 41B * 41C extended from each lower end part 40a side to the front side or back side. In this way, each communication portion 33 (33A, 33B, 33C, 33D, and 33E) has each opening width dimension L1 (communication) along the front-rear direction in a state where the airbag component member 23 is flatly deployed. The width dimension L1 in the front-rear direction of the opening in the portion 33 is set to each width dimension L2 along the front-rear direction in each vertical cell 31 (31A, 31B, 31C, 31D, 31E) (the width dimension L2 in the front-rear direction of the vertical cell 31). ) Is configured to be smaller than. Further, each communication portion 33 (33A, 33B, 33C, 33D, and 33E) is lower than the upper end portion 21a of the auxiliary inflatable portion 21 when the airbag 19 is inflated, as shown in FIGS. It will be arranged on the side. The peripheral edge portion 37, the vertical partition portions 40, the horizontal partition portions 41, the plate-like portions 43, and the horizontal extending portions 44 each constitute part of the gas non-inflow portion 36. Yes.

  As shown in FIG. 5, the auxiliary inflating portion 21 is disposed on the airbag component member 23 below the protective portion 20. In other words, the auxiliary inflating portion 21 is disposed on the lower side of the airbag component member 23 and is disposed over substantially the entire region of the airbag component member 23 in the front-rear direction. And the auxiliary expansion part 21 is comprised from the area | region enclosed by the peripheral part 37, the horizontal division part 41 extended in the front-back direction from the lower end part 40a side of the vertical division part 40, and the plate-shaped part 43. . Further, the auxiliary inflating part 21 positions the communication part 33 communicating with the protective inflating part 32 (vertical cell 31) in the protecting part 20 on the lower end part 21b side when the inflating is completed, The lower end portion 20b side of the protection portion 20 is disposed adjacent to the inner side of the protection portion 20, and a portion of the protection portion 20 on the lower end portion 20b side, which is the lower side of the protection portion 20, is substantially in the front-rear direction. It arrange | positions as a rod shape along the front-back direction so that it may cover covering the whole region. That is, the auxiliary expansion part 21 is disposed so as to straddle all the vertical cells 31 with the shape when the expansion is completed as a bar shape along the front-rear direction.

  Moreover, as shown in FIG.2 and FIG.6, the auxiliary expansion part 21 has couple | bonded the upper end part 21a side with the protection part 20 side only in the site | part of the joint part TP provided in three places distant in the front-back direction. Therefore, in the area away from the binding site TP, the upper end 21a side is directed to the inside of the vehicle so that the mouth is slightly opened. In other words, when the airbag 19 is completely inflated, the upper end 21a side, which is the upper part of the auxiliary inflatable portion 21, and the protective portion 20 are separated from each other, and the space between the protective portion 20 and the auxiliary inflatable portion 21 is reached. A concave portion 49 is formed at the site. Specifically, the binding site TP is composed of three binding sites TP1, TP2, and TP3. The binding site TP1 is provided on the front end side of the protection unit 20, and the binding site TP1a located on the front end side on the upper end 21a side, which is the site on the upper side of the auxiliary inflating part 21 in the peripheral portion 37, It is a part of the peripheral part 37 in the protection part 20, and is formed by combining with a binding part TP1b arranged on the vehicle outer side corresponding to the binding part TP1a. The binding site TP3 is provided on the rear end side of the protection unit 20, and the binding site TP3a located on the rear end side on the upper end 21a side, which is the site on the upper side of the auxiliary expansion portion 21, in the peripheral portion 37. And a part of the peripheral part 37 in the protection part 20 and a binding part TP3b arranged on the vehicle outer side corresponding to the binding part TP3a. The coupling part TP2 is provided in the middle between the front end part and the rear end part of the protection part 20, and is substantially intermediate between the front and rear end parts on the upper end part 21a side, which is the part on the upper side of the auxiliary expansion part 21 in the peripheral part 37. And a binding site TP2b that is disposed at the vehicle exterior side corresponding to the binding site TP2a. . That is, since the gas non-inflow portions 36 are coupled to each other and the protective expansion portion 32 and the auxiliary expansion portion 21 in the protection portion 20 are not coupled to each other, the protective expansion portion 32 and the auxiliary expansion portion 21 are in an expanded state. Even if it becomes the aspect closely_contact | adhered by, the auxiliary | assistant expansion | swelling part 21 and the protection expansion | swelling part 32 will be formed so that separation | separation is possible.

  As described above, each communication portion 33 is disposed below the upper end portion 21a of the auxiliary inflatable portion 21 when the airbag 19 is completely inflated. Therefore, when the airbag 19 is completely inflated, the auxiliary inflatable portion 21 tends to inflate as close to a circle as possible (three-dimensionally close to a spherical shape) when viewed in a cross section orthogonal to the front-rear direction. Therefore, the part on the upper end 21a side in the auxiliary expansion part 21 is separated from the protective expansion part 32 in the protection part 20, and the recess 49 in the part between the protection expansion part 32 and the auxiliary expansion part 21 is formed. It becomes possible to form reliably. In other words, when each communication portion 33 is disposed on the upper end portion 21a side of the auxiliary inflatable portion 21 or in the vicinity of the upper end portion 21a when the airbag 19 is in an inflated state, in the vicinity of each communication portion 33. The part on the upper end 21a side that is the part of the protective part 20 is difficult to be separated from the protective expansion part 32 in the protective part 20, and a recess 49 is formed in a part between the protective expansion part 32 and the auxiliary expansion part 21. It will be difficult to be done. In addition, also in the site | part of the plate-shaped part 43 in the protection part 20, if it is a site | part sufficiently away from the coupling | bond part TP3 in the front-back direction, the site | part by the side of the upper end part 21a in the auxiliary expansion part 21 will be spaced apart from the plate-shaped part 43. In this embodiment, a recess 49 is formed at a portion between the plate-like portion 43 and the auxiliary inflating portion 21. That is, the portion on the upper end 21 a side of the auxiliary expansion portion 21 is separated from the protection portion 20, and the concave portion 49 is formed at a portion between the protection portion 20 and the auxiliary expansion portion 21. .

  The position of the binding site TP may be appropriately changed as long as the concave portion 49 as described above can be formed. For example, each of the binding sites TP1 and TP3 reaches the upper end portion 21a from the middle portion in the vertical direction between the upper end portion 21a of the auxiliary expansion portion 21 and the lower end portion 21b of the auxiliary expansion portion 21 at the peripheral edge portion 37. As long as it is a site | part between, you may provide in arbitrary sites. Of course, if the recessed part 49 can be formed, the site | part which becomes a lower side rather than the intermediate | middle site | part of the up-down direction of the upper end part 21a of the auxiliary expansion part 21 and the lower end part 21b of the auxiliary expansion part 21 in the peripheral part 37. In addition, a binding site TP may be provided, but it is less desirable because the site on the upper end 21a side of the auxiliary inflating part 21 is too far away from the protection part 20 and the possibility that the recess 49 cannot be formed increases. Absent. Accordingly, each binding site TP is extended from the middle portion in the vertical direction between the upper end portion 21a of the auxiliary expansion portion 21 and the lower end portion 21b of the auxiliary expansion portion 21 to the upper end portion 21a. It is desirable to provide in the site | part in between, Furthermore, it is desirable to provide each coupling site | part TP in the site | part by the side of the upper end part 21a of the auxiliary expansion part 21 in the peripheral part 37. FIG. As another example, it is good also as a structure which provides the coupling | bond part TP2 with respect to the plate-shaped part 43 in the one side of the front-and-back end part of the plate-shaped part 43, or both. In particular, in the case where the binding site TP2 is provided on both the front and rear end portions of the plate-like portion 43, at the site serving as the boundary between the protective expansion portion 32 and the plate-like portion 43 (that is, the site near the binding site TP2). Although the concave portion 49 cannot be formed, the concave portion 49 is independent of each other about the entire region in the substantially front-rear direction of the portion corresponding to the protective expansion portion 32 and the entire region in the substantially front-rear direction of the portion corresponding to the plate-like portion 43. Will be formed. As still another example, each binding site TP is provided only at the front and rear end portions of the auxiliary inflating portion 21 (in other words, the binding site TP2 for the plate-like portion 43 is not provided, and only the binding sites TP1 and TP3 for the peripheral portion 37 are provided. It may be provided). In this case, the recessed part 49 will be formed over the whole area of the auxiliary | assistant expansion | swelling part 21 in the front-back direction. In addition, although the coupling | bond part TP is couple | bonded by sewing, you may employ | adopt suitably other coupling | bonding methods, such as adhesion | attachment, as long as strength is satisfied. Alternatively, the binding site TP may be formed in a long shape along the vertical direction from the current binding site TP to the lower end 21b side of the auxiliary inflating portion 21 instead of partial binding. good. When the coupling site TP is extended until it reaches the lower end 21b, the concave portion 49 includes the elongated coupling site TP, a portion that becomes the bottom of the concave portion 49 described later, a protective inflating portion 32, and the auxiliary inflating portion 21. It is formed in a pocket-like state surrounded by. If the required performance is not necessary, only the concave portion 49 for the protective inflating portion 32 is formed using the substantially entire region in the front-rear direction of the plate-like portion 43 as the coupling site TP, and the concave portion 49 for the plate-like portion 43 is not formed. It is good also as a structure.

  In the configuration described above, the recess 49 is always formed when the inflation of the airbag 19 is completed. After the head H of the occupant MP abuts the airbag 19, the lower side (door trim T The head H of the occupant MP is further moved downward because it is caught in the concave portion 49 formed in the portion between the protective inflating portion 32 and the auxiliary inflating portion 21 even if it is slipping to the side). Slipping is suppressed (see FIG. 7). That is, the head H of the occupant MP is prevented from sliding excessively downward. Accordingly, when the head H of the occupant MP slides downward, the head H of the occupant MP is prevented from reaching the lower side than the protective inflating portion 32 of the airbag 19. The state of being outside the range of the effective protection area by the protective inflating part 32 of the airbag 19 and directly contacting with the vehicle interior components (such as the door trim T) is avoided.

  In addition, if the effect which suppresses that the head H of passenger | crew MP excessively slips below and the same effect as mentioned above are acquired, the recessed part 49 will not necessarily be the completion | finish of inflation of the airbag 19. It may not be formed. That is, when the head H of the occupant MP slides downward after coming into contact with the airbag 19, the head H of the occupant MP comes into contact with the auxiliary inflating part 21, thereby protecting the inflating part. It is good also as a structure which the recessed part 49 is formed in the site | part between 32 and the auxiliary | assistant expansion | swelling part 21, and the head H of passenger | crew MP catches the recessed part 49. Specifically, at the part between the front and rear directions of each joint part TP, the peripheral edge part 37 on the upper end part 21a side of the auxiliary expansion part 21 and each vertical partition part 40 (40A, 40B, 40C) are temporarily joined. It may be provisionally coupled with the part TPK (TPK1, TPK2, TPK3). In this case, each temporary coupling portion TPK (TPK1, TPK2, and TPK3) has a concave portion 49 at a position between the protective inflating portion 32 and the auxiliary inflating portion 21 while maintaining the coupled state when the airbag 19 is completely inflated. Does not form. Then, when the head H of the occupant MP is in contact with the airbag 19 and then slides downward, the head H of the occupant MP is in contact with the auxiliary inflating portion 21, so that the temporary coupling portion Temporary coupling of TPK (TPK1, TPK2, TPK3) is released, and a recess 49 is formed in a portion between the protective inflating portion 32 and the auxiliary inflating portion 21, and the head H of the occupant MP is caught in the recessed portion 49. It becomes an aspect. With such a configuration, when the airbag 19 is completely inflated, the concave portion 49 is not formed in the portion between the protective inflating portion 32 and the auxiliary inflating portion 21, and accordingly, in this region. The thickness of the airbag 19 in the left-right direction (in other words, the protective inflatable portion 32, the auxiliary inflatable portion 21, and the concave portion 49 formed in a portion between the protective inflatable portion 32 and the auxiliary inflatable portion 21). (Thickness) is formed thin. Therefore, even when the head H of the occupant MP and the windows W1 and W2 are close to each other and the gap between the head H of the occupant MP and the windows W1 and W2 is narrow, the expansion is accompanied. The airbag 19 that is deployed is easy to interrupt the gap between the head H of the occupant MP and the windows W1 and W2.

  Temporary bonding of each temporary bonding portion TPK (TPK1, TPK2, TPK3) is bonded by breakable sewing, but other bonding methods such as adhesion may be appropriately used as long as the bonding method can obtain the same effect. It may be adopted. In the case of temporary bonding by bonding, an adhesive may be applied over substantially the entire region in the front-rear direction at the peripheral edge 37 on the upper end 21 a side of the auxiliary expansion portion 21. In the case of temporary bonding by bonding, an adhesive may be applied over substantially the entire region of the auxiliary inflatable portion 21 in the vehicle inner side wall portion 25a, which becomes the vehicle outer wall portion. As a temporary connection by bonding, in the case of applying the adhesive over substantially the entire region of the vehicle inboard side wall portion 25a in the auxiliary inflatable portion 21 at the time of completion of inflation of the airbag 19, Since the concave portion 49 is not formed at all between the protective inflatable portion 32 and the auxiliary inflatable portion 21, the thickness of the airbag 19 in the left-right direction in this region is further reduced. When the head H of the occupant MP and the windows W1 and W2 are close to each other and the gap between the head H of the occupant MP and the windows W1 and W2 is narrow, the air is expanded with expansion. The ease of interruption with respect to the gap between the head H of the occupant MP and the windows W1 and W2 of the incoming airbag 19 is further improved.

  The gas non-inflow portion 36 includes a peripheral edge portion 37 that forms the peripheral edge of the airbag component member 23, an attachment portion 38 that is formed on the upper edge side of the peripheral edge portion 37 and extends upward, and the first in the protection portion 20. A vertical partition 40 formed in the region of the head protection unit 29 and the second head protection unit 30, and a protection unit 20 and the auxiliary expansion unit 21 are partitioned from the lower end 40 a of the vertical partition 40. And a plate-like portion 43 disposed between the first head protecting portion 29 and the second head protecting portion 30.

  The peripheral edge portion 37 is disposed so as to surround the gas inflow portion 25 and constitutes the outer peripheral edge of the airbag component member 23. In the airbag 19 at the completion of the expansion, the peripheral portion 37 in the protective portion 20 and the auxiliary inflatable portion 21. The outer peripheral edge excluding the lower ends 20b and 21b is formed. The attachment portion 38 extends upward from the upper end portion 37a on the upper side of the peripheral edge portion 37 constituting the upper end portion 20a of the protection portion 20, and a plurality of attachment portions 38 are formed along the front-rear direction. The upper end portion 20a side of the portion 20 is connected to the body 1 side of the vehicle V, and the airbag 19 is connected to the body 1 side to be fixed. The attachment portions 38 are arranged at six locations, and each has insertion holes 38a through which the airbag attachment bolts 11 for attaching and fixing the airbag attachment bracket 10 to the inner panel 2 on the body 1 side can be inserted. I have. Each mounting portion 38 is fixed to the inner panel 2 by using the airbag mounting bracket 10 and the airbag mounting bolt 11. Each attachment portion 38 is integrally formed with the airbag component member 23. However, if there is no problem in strength, a separate cloth-like member such as a connecting belt 46 described later can be sewn or sewn. It is good also as a structure attached to the upper end part 20a side of the protection part 20 by adhesion | attachment etc. Further, if there is no problem of strength against the inflation of the airbag 19, the arrangement of the six places may be reduced, and conversely, six or more places may be arranged in order to increase the strength margin.

  The vertical partitioning section 40 has a substantially band shape along the vertical direction, and extends in the front-rear direction so as to partition the vertical cells 31 in the region of the first head protection section 29 and the second head protection section 30. Arranged. Two vertical partition sections 40 (40A and 40B) are disposed in the area of the first head protection section 29, and one vertical partition section 40 (40C) in the area of the second head protection section 30. ) Is arranged. Of the vertical compartments 40 arranged in the first head protection part 29, the front vertical compartment 40A is arranged on the front side, and the rear vertical compartment 40B is arranged on the rear side. .

  The horizontal partition portion 41 extending from the lower end portion 40a side of each vertical partition portion 40 (40A, 40B, 40C) is belt-shaped on both front and rear sides substantially along the front-rear direction from the lower end portion 40a side of each vertical partition portion 40. It is extended and configured. Each horizontal partition 41 (41A, 41B, 41C, 41D, 41E, and 41F) has a distal end 41a side in the front-rear direction and an upper side than a connecting portion (lower end 40a) with the vertical partition 40. It is formed so as to be slightly inclined with respect to the front-rear direction. That is, each horizontal partition 41 has a substantially “V” shape centering on a connection portion (lower end 40 a) with the vertical partition 40. The horizontal partition 41 is a part that partitions the protection unit 20 and the auxiliary inflating unit 21. As described above, the region between the adjacent horizontal partitions 41, the horizontal partition 41, and the plate-shaped part 43. A region between the laterally extending portions 44 constitutes a communication portion 33 that allows the protection portion 20 and the auxiliary expansion portion 21 to communicate with each other. In addition, in this way, a part that partitions the protection part 20 and the auxiliary expansion part 21 forms a boundary part 34 between the protection part 20 and the auxiliary expansion part 21.

  The plate-like portion 43 is a substantially rectangular plate-like shape, and is a part between the first head protecting portion 29 and the second head protecting portion 30 in the airbag component member 23 and a gas supply path portion. 26 and the auxiliary inflatable portion 21. That is, the plate-like portion 43 is located at the lower side of the gas supply path portion 26 in the portion between the first head protecting portion 29 and the second head protecting portion 30 in the protecting portion 20 at the completion of expansion. It will be arranged. In the plate-like portion 43, the width dimension L 3 in the front-rear direction (the width dimension L 3 in the front-rear direction of the plate-like portion 43) is set larger than the width dimension L 2 in the front-rear direction of the vertical cells 31. On the lower end portion 43a side of the plate-like portion 43, a strip-like laterally extending portion 44 (44F / 44B) extending on both the front and rear sides is formed. Similarly to the horizontal partition portion 41, the laterally extending portion 44 is also slightly inclined with respect to the front-rear direction so that the tip end portion 44a side is positioned above the connection portion (lower end portion 43a) with the plate-like portion 43. And formed. The inclination angle of the laterally extending portion 44 with respect to the front-rear direction is set to be substantially the same as the inclination angle of the horizontal partition portion 41 with respect to the front-rear direction. Note that the front side laterally extending portion 44F extends to the front side of the plate-like portion 43, and the rear side laterally extending portion 44B extends to the rear side of the plate-like portion 43.

  A connecting belt 46 that is separate from the airbag component member 23 is disposed on the front end side of the protection unit 20. The connecting belt 46 is composed of a woven fabric made of polyamide yarn, polyester yarn, or the like, similar to the airbag component member 23, and the widened base portion side is set in the vertical direction on the front end side of the protective portion 20. It is set as the structure provided with the attaching part 47 on the front end side by sewing at the approximate center vicinity. The mounting portion 47 includes an insertion hole 47a through which the airbag mounting bolt 11 can be inserted. Similarly to the mounting portion 38 provided on the upper end portion 20a side of the protective portion 20, the mounting bracket for the airbag is used. 10 and the airbag mounting bolts 11 are attached and fixed to the inner panel 2 on the body 1 side. Specifically, the mounting portion 47 is above the window W1 on the lower side of the fixing portion (the portion of the roof side rail portion RR on the upper edge side of the windows W1 and W2) of the mounting portion 38 to which the protection portion 20 is mounted. It will be fixed to the inner panel 2 in the vicinity of the front lower end of the front pillar portion FP on the edge side. The connection belt 46 may be formed integrally with the airbag constituting member 23 if the yield and the like are not taken into consideration.

  The airbag 19 flatly deploys the airbag constituent member 23 to which the connecting belt 46 has been sewn in advance, so that the distal end portion 41a of each lateral partition portion 41 and each laterally extending portion 44 in the plate-like portion 43 are spread. The auxiliary inflatable portion 21 is folded so as to overlap with the inner side of the protective portion 20 at the portion of the fold line CL1 that is substantially along the front-rear direction so as to connect the front end portion 44a of the two, and the folded portions are coupled to each other The part TP (specifically, the lower part 37b of the peripheral part 37 on the upper end part 21a side of the auxiliary inflating part 21 is connected to the front part 37c and the peripheral part 37 of the peripheral part 37 on both front and rear ends of the protective part 20. It can be manufactured by sewing with a suture thread at the side portion 37d and the plate-like portion 43 that is substantially the center before and after the protective portion 20). Note that the crease CL1 is formed at a position where the width L1 of the opening in each communication portion 33 is the narrowest in the airbag component member 23 and slightly above the lower end portion 43a of the plate-like portion 43. Has been. That is, in the airbag 19, the communication portion 33 communicates the lower end portion 31 b of the vertical cell 31 that is the lower end side of the protective inflating portion 32 in the protection portion 20 and the lower end portion 21 b that is the lower end side of the auxiliary inflating portion 21. In addition, in the state where the airbag 19 is flatly deployed in a flat shape, the protection portion 20, the communication portion 33, and the auxiliary inflating portion 21 are integrally formed as an airbag constituent member 23, and are protected. The communication part 33 which becomes the boundary part 34 between the part 20 and the auxiliary expansion part 21 is formed by being bent along the crease CL1 as a fold part (fold line CL1). Therefore, the auxiliary inflating portion 21 can be disposed with a relatively simple configuration. That is, the bent portion forms a portion that becomes the bottom of the recess 49. In addition, each front-end | tip part 41a * 44a of each horizontal division part 41 and each horizontal extension part 44 formed in strip | belt shape is made into the substantially ellipse shape wider than a strip | belt-shaped part, The strip | belt shape mentioned above In combination with the inclination of the portion, when manufacturing the airbag 19, the boundary portion 34 is configured to be easily bent, and when the airbag 19 is completely inflated, the protective inflation portion 32 and the auxiliary inflation portion 21 are inflated. The communication portion 33 is closed by the change in shape due to the above. In other words, the communication portion 33 functions as a so-called throttle valve, and after the inflation of the airbag 19 is completed, the inflation gas G that has flowed into the auxiliary inflation portion 21 flows out to the protective inflation portion 32 ( (Backflow) is suppressed. Incidentally, the inflation gas G discharged from the inflator 13 flows from the gas inlet portion 27 of the airbag 19 toward the inside of the airbag 19, passes through the gas supply path portion 26, and becomes the protective inflation portion 32. It flows into the vertical cell 31 and is further supplied to the auxiliary expansion part 21 via each communication part 33. Since the head protection airbag device M is premised on the operation when the vehicle V falls, the airbag 19 is not provided with a vent hole or the like for exhausting the inflation gas G. You may provide in the arbitrary places of the part 32 and the auxiliary expansion part 21. FIG.

  In the head protecting airbag device M, the airbag component member 23 in which the auxiliary inflating portion 21 is disposed on the lower side of the vertical cell 31 in a state where the head inflating flatly is formed is connected to the auxiliary inflating portion 21 in the vertical direction. Since the airbag 19 is manufactured by folding back at the boundary part 34 with the cell 31 and joining the folded parts with the joint part TP provided partially, the vertical cell 31 and the auxiliary inflation are produced. If the airbag constituent member 23 integrally formed with the portion 21 is folded at the boundary portion 34 (fold CL1) between the auxiliary inflatable portion 21 and the vertical cell 31 and joined together at the joint portion TP, the airbag 19 can be manufactured, and the airbag 19 can be easily manufactured compared with the case where the auxiliary | assistant expansion | swelling part 21 is comprised as a different body with respect to the vertical cell 31. FIG. Note that the bent portion at the boundary portion 34 (fold CL1) forms a portion that becomes the bottom of the concave portion 49. With this configuration, the bottom of the concave portion 49 extends substantially over the entire length of the auxiliary inflatable portion 21 in the front-rear direction. However, only the part (specifically, the part on the upper end side of the communication part 33) is configured such that the protection part 20 and the auxiliary expansion part 21 are connected only at the peripheral part of the communication part 33. A portion that becomes the bottom of the recess 49 may be formed. In this case, the part where the protection part 20 and the auxiliary expansion part 21 are not connected is in a state where there is no part serving as the bottom of the recess 49, and is formed as a configuration similar to the gap 48 in the third embodiment to be described later. Become. In this case, the concave portion 49 and the gap 48 are formed in a mixed manner.

  Further, in the head protecting airbag device M, the auxiliary inflating portion 21 is disposed over substantially the entire region before and after the protecting portion 20 that is the inflating and inflating region in the airbag 19 at the time of completion of inflation. When the airbag 19 is completely inflated, the auxiliary inflatable portion 21 can support the lower end portion 20b side of the protective portion 20 across the entire front and rear. Of course, if this point is not taken into account, the auxiliary inflatable portion 51 may be configured not to be disposed over the entire region before and after the protective portion 20Y, as in an airbag 50 described later. Further, on the side of the head H of the occupant MP, the auxiliary inflating portion 21 is only provided in the region of the first head protecting portion 29 and the second head protecting portion 30 that are arranged adjacently in front and rear when the inflating is completed. You may comprise as the airbag 19 which arrange | positioned.

  Furthermore, in this head protection airbag apparatus M, the communication part 33 which connects the protection part 20 and the auxiliary | assistant expansion | swelling part 21 is formed along the up-down direction so that each vertical cell 31 may be divided mutually. It is comprised in the site | part between each horizontal division part 41 extended substantially along the front-back direction from the lower end part 40a side of the vertical division part 40, and the airbag structural member 23 is made into each horizontal division part 41. The airbag 19 is formed by folding back at the site. In other words, the gas non-inflow portion 36 that does not allow the inflation gas G to flow therein, and each horizontal partition portion 41 disposed substantially along the front-rear direction constitutes the starting point of the fold (fold CL1). Therefore, when the inflation of the airbag 19 is completed, it is easy to secure the bent shape of the auxiliary inflatable portion 21 with respect to the vertical cell 31 so that the auxiliary inflatable portion 21 covers the vehicle inner side on the lower end portion 20b side of the protective portion 20. , Can be placed stably.

  In particular, in this head protection airbag device M, the airbag component member 23 is folded back at a portion near the lower end portion 43a of the plate-like portion 43 in addition to the portion of the horizontal partition portion 41. In the crease CL1), the length of the gas non-inflow portion 36 where the expansion gas G does not flow is large, and the length in the front-rear direction is such that the auxiliary expansion portion 21 covers substantially the entire front-rear direction of the protection portion 20. Even when the airbag 19 is completely inflated, even when it is configured to be coupled to the protective unit 20 side only by the coupling sites TP provided at three locations scattered in the front-rear direction, It is difficult to restore so as to eliminate the state where the auxiliary inflating part 21 is folded back, and a part of the auxiliary inflating part 21 that is away from the coupling part TP separates the upper end 21a side of the auxiliary inflating part 21 from the protective part 20. , Lower side It can be prevented from being open towards large mouth. Of course, the airbag component 23 has a large area of the gas inflow portion 25 through which the inflation gas G flows (for example, the plate-like portion (peripheral portion 37) of the auxiliary inflation portion 21 in the airbag component 23). The airbag 19 may be configured so as to be folded back in the vicinity of the vicinity). In this case, if the upper end portion 21a side of the auxiliary inflatable portion 21 is connected to the protective portion 20 side, the number of the binding portions TP is increased. Even if the airbag component member 23 is configured to be folded back at a location where the region of the gas inflow portion 25 is large, the auxiliary inflatable portion 21 can be disposed on the vehicle inner side on the lower end portion 20b side of the protective portion 20 without any trouble when the inflation is completed. .

  Further, in the head protection airbag device M, the lateral partition portion 41 is configured to be inclined with respect to the front-rear direction so that the front end 41a side substantially along the front-rear direction is positioned on the upper side. As shown in FIG. 8, the auxiliary inflatable portion 21 has a width dimension L4 in the vertical direction at a portion immediately below the communicating portion 33 on the distal end portion 41 a side of each lateral partition portion 41. It will be configured to be larger than the width dimension L5 in the vertical direction at the site directly below each vertical partition 40 that is the site. That is, in the head protecting airbag device M, when the airbag 19 is completely inflated, the auxiliary inflating portion 21 maximizes the inner diameter dimension of the portion immediately below the communicating portion 33, and the longitudinal direction extends in the front-rear direction. Thus, an expansion completion shape is formed such that a substantially elliptical sphere (see the two-dot chain line in FIG. 9) configured in a continuous manner is formed in the front and rear, and in other words, an intermediate portion between the communication portions 33 (in other words, In addition, constriction is caused at both ends of each elliptical sphere in the longitudinal direction and at a portion immediately below each vertical partition 40 and a connection portion (communication portion 33) with each vertical cell 31. , Will be placed. Therefore, even if each communication part 33 with each vertical cell 31 is provided, when the airbag 19 is completely inflated, the auxiliary inflating part 21 causes the inflation gas G to flow in via the communication part 33, and each communication part 33. If the periphery of the corresponding part is expanded into an elliptical spherical shape, it is difficult to restore the auxiliary expansion part 21 so as to eliminate the folded state of the auxiliary expansion part 21 in the vicinity of each communication part 33, and the auxiliary expansion part for the protection part 20 The bent shape of 21 can be more easily secured, and the auxiliary inflatable portion 21 can be more stably disposed so as to cover the vehicle inner side on the lower end portion 20b side of the protective portion 20 when the expansion is completed. Of course, if this point is not taken into account, the lateral partition 41 may be configured in a linear strip or line along the front-rear direction.

  In this head protection airbag device M, the auxiliary inflating portion 21 is configured as one horizontally long cell extending in the front-rear direction. It may be divided into a plurality of cells, or tethers may be appropriately arranged to regulate the amount of expansion in the vertical direction and the horizontal direction so as to have an arbitrary expansion shape. Moreover, it is good also as a structure which provided the communicating hole in the above-mentioned partition, and the some cell connected mutually. Further, the shape (so-called cell pattern) of the protective expansion portion 32 and the plate-like portion 43 may be set to an arbitrary shape as long as the auxiliary expansion portion 21 and the communication portion 33 can be formed. Further, if the desired recess 49 can be formed instead of the binding site TP, not only the mode in which the sites that become the gas non-inflow portion 36 are brought into close contact with each other, but also the tether SP shown by the two-dot chain line in FIG. It is good also as a structure connected using the connection member which has such a strip | belt-shaped fixed length. In this tether SP, it arrange | positions at three places so that the upper end part 21a of the auxiliary expansion part 21 and the upper end part 20a of the protection part 20 may be connected. As an example of changing the arrangement of the tether SP, one part may be connected in the state of the gas inflow part 25 and the other part may be connected in a state of the part of the gas non-inflow part 36. It is good also as composition to do.

  Next, the structure of 2nd Embodiment is demonstrated based on FIGS. 9-11. The airbag 50 has the same configuration as that of the airbag 19 described above except that the additional inflation portion 53 is disposed in the arrangement region of the auxiliary inflation portion 51 and the plate-like portion 43Y of the protection portion 20Y. The members are denoted by the same reference numeral “Y”, and detailed description thereof is omitted. In the airbag 50, the auxiliary inflating portion 51 is disposed near the center in the front-rear direction. Specifically, the auxiliary inflating part 51 is divided into a vertical cell 31YC arranged on the rear end side of the first head protecting part 29Y and a vertical cell 31YD arranged on the front end side of the second head protecting part 30Y. In order to communicate with each other, the expansion completion shape is a rod shape substantially along the front-rear direction, and is disposed inside the protective portion 20Y. In other words, the auxiliary expansion part 51 is disposed so as to straddle the two vertical cells 31YC and 31YD in the vicinity of the lower end part 31Yb of the two vertical cells 31YC and 31YD adjacent in the front-rear direction via the plate-like part 43Y. Has been. A communication portion 33Y communicating with the auxiliary expansion portion 51 is formed on the lower end portion 31Yb side of the two vertical cells 31YC and 31YD.

  In the airbag 50, an additional inflatable portion 53 that can be inflated by allowing the inflating gas G to flow therein is formed in the region of the plate-like portion 43Y in communication with the auxiliary inflatable portion 51. The additional expansion portion 53 is closed at the upper end portion 53a side and opened at the lower end portion 53b side so as to be able to communicate with the auxiliary expansion portion 51. The additional inflating portion 53 is formed at substantially the center in the front-rear direction of the plate-like portion 43Y, and the width dimension L6 in the front-rear direction is substantially ¼ of the width dimension L7 in the front-rear direction of the plate-like portion 43Y. It is set to be about. Further, the opening 54 on the lower end 53b side of the additional expansion portion 53 has a width dimension (width dimension in the front-rear direction of the opening 54) L8 smaller than the width dimension L6 of the additional expansion section 53 in the front-rear direction. Is formed. Further, the plate-like portion 43Y is configured so that the lower end portion 43Ya substantially coincides with the lower end portion 20Yb of the protection portion 20Y.

  As shown in FIG. 11, the airbag component member 56 constituting the airbag 50 connects the protective portion 20Y and the auxiliary inflatable portion 51 to each other at the lower end portions 20Yb and 51b when the inflation is completed. Thus, the protective part 20Y and the auxiliary inflating part 51 are integrally formed, and the outer shape approximates a substantially reverse convex shape. In the airbag 50, each vertical partition 40Y of the protection part 20Y extends upward from the peripheral edge 37Y and is formed continuously with the peripheral edge 37Y. Then, the airbag 50 folds the auxiliary inflating portion 51 inward at the position of the fold line CL2 formed substantially along the front-rear direction at a position substantially coincident with the lower end portion 43Ya of the plate-like portion 43Y, and the additional inflating portion 53 If the peripheral portions 37Y of the auxiliary inflating portion 51 are joined to the plate-like portion 43Y with the positions on the both front and rear sides as the coupling sites TPY, the manufacturing can be performed. Therefore, also in the airbag 50, the concave portion 49Y is formed in a portion between the protective inflating portion 32Y and the auxiliary inflating portion 51 at the time of completion of the inflating.

  In the airbag 50, an additional inflatable portion 53 that can communicate with the auxiliary inflatable portion 51 and can flow in the inflating gas G is formed in the region of the plate-like portion 43Y. When the bag 50 is inflated, the bag 50 is inflated so as to reduce the width dimension in the front-rear direction. Therefore, tension (tension) along the front-rear direction can be generated in the airbag 50 (protection unit 20Y) at the completion of the inflation. Further, the folded crease CL2 of the additional expansion portion 53 at this time closes the periphery of the inflow port (opening 54) of the expansion gas G of the additional expansion portion 53, and the internal pressure of the additional expansion portion 53 decreases. Since it is difficult, maintenance of tension can be ensured for a long time. In particular, in the airbag 50 having the above-described configuration, the auxiliary inflating portion 51 is folded back with respect to the protective portion 20Y starting from the lower end portion 43Ya of the plate-like portion 43Y in which the opening 54 of the additional inflating portion 53 is formed. Thus, when the inflation of the airbag 50 is completed, the inflation gas G once flowing into the additional inflatable portion 53 can be prevented as much as possible from flowing out (backflow) from the opening 54 to the auxiliary inflatable portion 51 side. The internal pressure of the portion 53 can be kept high for a long time. Therefore, even when the vehicle V falls over after the inflation of the airbag 50 is completed, it is possible to maintain a state in which the tension along the front-rear direction is generated in the protection unit 20Y. Note that such an auxiliary inflating portion 51 may be applied to the airbag 19 described above.

  Next, the structure of 3rd Embodiment is demonstrated based on FIGS. In the airbag 58, the protection part 20Z and the auxiliary inflating part 21Z are configured as separate bags. The airbag 58 has the same configuration as that of the airbag 19 described above except that the protective portion 20Z and the auxiliary inflatable portion 21Z are configured as separate bags, respectively. “Z” is assigned to the reference numeral, and detailed description is omitted. Also in the airbag 58, the auxiliary inflating portion 21Z is disposed inside the protective portion 20Z, and the auxiliary inflating portion 21Z and the protecting portion 20Z are portions below the vertical cells 31Z in the protecting portion 20Z. The auxiliary expansion portion 21Z and the protection portion 20Z are connected to each other at a peripheral portion of the communication hole 59, and are communicated with each other via a communication hole 59 formed on the lower side portion 31Zb side. Are connected. That is, in the airbag 58, the auxiliary inflation portion 21Z and the protection portion 20Z are connected to each other at the peripheral portions of the communication holes 59 formed at five locations along the front-rear direction. At the time of completion, the position of the auxiliary expansion portion 21Z can be stabilized, and the auxiliary expansion portion 21Z can be disposed so as to stably cover the vehicle interior on the lower side of the protection portion 20Z.

  The communication hole 59 corresponds to the communication portion 33 in the airbag 19 of the first embodiment, and is formed in a portion that is below the upper end portion 21Za of the auxiliary inflatable portion 21Z. The communication hole 59 also serves as the binding site TP in the airbag 19. Therefore, also in this airbag 58, the recessed part 49Z will be formed in the site | part between the protection expansion part 32Z and the auxiliary | assistant expansion part 51 at the time of completion | finish of expansion | swelling. Note that a plurality of communication holes 59 may not be provided, and at least one communication hole 59 may be provided in any part of the auxiliary expansion part 21Z as long as the concave part 49Z can be formed. However, from the viewpoint of improving the stability, it is desirable to provide at least two communication holes 59 in any part of the auxiliary inflating part 21Z, and more desirably, parts at both ends in the front-back direction of the auxiliary inflating part 21Z. It is desirable to provide them respectively. In addition, in the case where at least two communication holes 59 are provided in any part of the auxiliary inflating portion 21Z, one of them is simply used as the coupling part TP and the communication hole 59 may not be used. Further, when connecting the communication holes 59, any coupling means such as sewing or adhesion may be used as long as it has a required strength and leakage of the inflation gas G is suppressed.

  In this configuration, the upper end portion of the communication hole 59 forms the bottom portion of the recess 49Z, and the portion between the communication holes 59 does not have the bottom portion of the recess 49Z. It is formed as a gap 48 which is a part. That is, the concave portion 49 and the gap 48 are formed in a mixed manner. Further, when connecting the communication hole 59, although not shown in the figure, a connecting pipe having a predetermined length is used, and a recess having a larger space at a portion between the protective expansion portion 32Z and the auxiliary expansion portion 51. 49Z and the gap 48 may be formed. Similarly to the concave portion 49 of the first embodiment described above, a temporary coupling portion (not shown) that performs the same function as the above-described temporary coupling portion TPK is provided, and the gap 48 is also not formed at the initial stage of expansion. It may be configured.

  A head protection airbag device having a configuration that is sufficient in that the head H of the occupant MP is prevented from slipping downward (door trim T side) during the overturn (rollover) of the vehicle V. M can be applied to the vehicle V.

It is the schematic front view which looked at the head protection airbag device which is a 1st embodiment of the present invention from the vehicle inside (vehicle left side). It is a front view showing the state where the air bag used with the head protection air bag device of a 1st embodiment was developed flat in the shape of a plane. It is a schematic sectional drawing of the airbag used with the head protection airbag apparatus of 1st Embodiment, and is sectional drawing of the III-III site | part of FIG. It is a schematic sectional drawing of the airbag used with the head protection airbag apparatus of 1st Embodiment, and is sectional drawing of the IV-IV site | part of FIG. It is a front view which shows the state which expand | deployed the airbag structural member which comprises the airbag used with the head protection airbag apparatus of 1st Embodiment flatly. In the head protection airbag device of the first embodiment, it is a schematic front view of a state in which the airbag has been inflated as viewed from the vehicle inner side (vehicle left side). In the head protection airbag device of a 1st embodiment, it is an outline sectional view which met the up-and-down direction which shows the inflated state of an airbag. It is a general | schematic expanded sectional view which shows the expansion | swelling aspect of an auxiliary | assistant expansion | swelling part in the head protection airbag apparatus of 1st Embodiment. It is a front view which shows the state which unfolded the airbag used with the head protection airbag apparatus which is 2nd Embodiment of this invention flatly flatly. It is a schematic sectional drawing of the airbag used with the head protection airbag apparatus of 2nd Embodiment, and is sectional drawing of the XIII-XIII site | part of FIG. It is a front view which shows the state which developed the airbag structural member which comprises the airbag used with the head protection airbag apparatus of 2nd Embodiment flatly. It is a front view which shows the state which expand | deployed flatly the airbag used with the head protection airbag apparatus which is 3rd Embodiment of this invention planarly. It is a schematic sectional drawing of the airbag used with the head protection airbag apparatus of 3rd Embodiment, and is sectional drawing of the XVI-XVI site | part of FIG. It is a front view which shows the state which arranged the protective part and auxiliary expansion part which comprise the airbag used with the head protection airbag apparatus of 3rd Embodiment side by side, and was flatly developed in planar shape. In the head protection airbag apparatus of 3rd Embodiment, it is a schematic sectional drawing along the up-down direction which shows the inflated state of an airbag.

Explanation of symbols

G: Expansion gas MP: Passenger H: Head (of passenger) I: Vehicle interior M: Head protection airbag device V: Vehicle BL: Belt line CP: Center pillar portion FP: Front pillar portion RP: Rear pillar portion RR : Roof side rail part CL1: crease CL2 (in the first embodiment): crease L1 (in the second embodiment): width dimension L2 (in the front-rear direction of the opening in the communication part): width (in the front-rear direction of the vertical cell) Dimension L3: Width dimension L4 (in the front-rear direction of the plate-like portion in the first embodiment): Width dimension L5 (in the vertical direction of the portion directly below the communication portion of the auxiliary expansion portion) L5: (Vertical section of the auxiliary expansion portion) Width dimension L6 (in the front-rear direction of the additional expansion part) in the region directly below the part: Width dimension L7 (in the front-rear direction of the plate-like part in the second embodiment) L8: (in the additional expansion part) Oke Width dimension W1 in the front-rear direction of the opening: (front side) window W1a: lower end portion W2 (front side window): (rear side) window W2a: lower end portion TP (of rear side window): coupling (in the first embodiment) Site TP1: Binding site TP1a (provided on the front end side of the protective part): Binding site TP1b (located on the front end side on the upper end side of the auxiliary inflating part): Outside the vehicle corresponding to the binding site TP1a Arranged) Binding site TP2: (provided in the middle between the front end and the rear end of the protective part) Binding site TP2a: (located on the upper end side of the auxiliary expansion part, approximately in the middle of the front and rear ends) TP2b: Binding site TP3 (located on the vehicle exterior side corresponding to the binding site TP2a): Binding site TP3a (provided on the rear end side of the protective part): (Rear end on the upper end side of the auxiliary expansion part) Binding site TP3b (located on the side): (binding site TP3 Bonding part TPK1: Temporary coupling part TPK1: Temporary coupling part TPK2 (for the front vertical partition part 40A): Temporary coupling part TPK3: (for the rear vertical partition part 40B): Temporary joint portion TPY (for the partition portion 40C): Joint site 1 (in the second embodiment): Body 2: Inner panel 4: Front pillar garnish 4a: Lower edge portion 5 of (front pillar garnish): Roof head lining 5a: ( Lower edge 6 of roof head lining: Center pillar garnish 7: Rear pillar garnish 8: Air bag cover 10: Air bag mounting bracket 11: Air bag mounting bolt 13: Inflator 14: Inflator mounting bracket 15: Inflator mounting Bolt 16: Clamp 19: (First embodiment Air bag 20: protection part 20a (in the first embodiment) upper end part 20b (in the protection part of the first embodiment) lower end part 20Y (in the protection part of the first embodiment): (second embodiment) Protective portion 20Yb: Lower end portion 20Z (in the protective portion of the second embodiment): Protective portion 21 (in the third embodiment): Auxiliary inflating portion 21a (in the first embodiment): (Assist in the first embodiment) Upper end portion 21b (in the expansion portion): Lower end portion 21Z (in the auxiliary expansion portion of the first embodiment): Auxiliary expansion portion 21Za (in the third embodiment): Upper end portion 23 (in the auxiliary expansion portion of the third embodiment): (In 1st Embodiment) Airbag component 25: Gas inflow part 25a: Car inner side wall part 25b: Car outer side wall part 26: Gas supply path part 27: Gas inflow port part 27a: (Gas Rear end portion 29 of entrance portion: First head protection portion 29Y (in the first embodiment): First head protection portion 30 (in the second embodiment): Second head portion (in the first embodiment) Protection part 30Y: Second head protection part 31 (in the second embodiment): Vertical cell 31a (in the first embodiment) Upper end part 31b (in the vertical cell of the first embodiment): (in the first embodiment) Lower end portion 31A (in the vertical cell): Vertical cell 31B (on the front end side of the first head protecting portion in the first embodiment): Vertical cell 31C (in the center of the first head protecting portion in the first embodiment): ( Vertical cell 31D on the rear end side of the first head protecting part in the first embodiment: Vertical cell 31E (on the front end side of the second head protecting part in the first embodiment): (second in the first embodiment) Vertical cell 31YC on the rear end side of the head protecting part: (second embodiment) Vertical cell 31YD (on the rear end side of the first head protecting portion): vertical cell 31Yb (on the front end side of the second head protecting portion in the second embodiment): lower end (in the vertical cell of the second embodiment) 31Zb: Lower side portion 32 (in the vertical cell of the third embodiment): Protective expansion portion 32Y (in the first embodiment) Protective expansion portion 32Z (in the second embodiment) Protective expansion (in the third embodiment) Part 33: Communication part 33A (in the first embodiment): Communication part 33B (in the vertical cell 31A of the first embodiment): Communication part 33C (in the vertical cell 31B of the first embodiment): (in the first embodiment) Communication portion 33D (in vertical cell 31C): Communication portion 33E (in vertical cell 31D of the first embodiment) Communication portion 33Y (in vertical cell 31E of the first embodiment) Communication portion (in the second embodiment) 4: Boundary part 36: Gas non-inflow portion 37: Peripheral portion 37a (in the first embodiment): Upper end portion 37Y (in the peripheral portion): Peripheral portion 38 (in the second embodiment): (on the upper end side of the airbag) Mounting portion 38a: (In the mounting portion 38) Insertion hole 40: Vertical partition portion 40a (in the first embodiment) Lower end portion 40A (in the vertical partition portion of the first embodiment): (First embodiment) Front vertical partition section 40B (in front of the first head protection section in the embodiment): Rear vertical partition section 40C (in rear of the first head protection section in the first embodiment): (second in the first embodiment) Vertical partition section 40Y (in the head protection section): Vertical partition section 41 (in the second embodiment): Horizontal partition section 41a: Tip section 41A (in the horizontal partition section): Extends forward from the vertical partition section 40A ) Horizontal partition 41B: (Vertical partition 4) Horizontal partition portion 41C (extended to the rear side from A): Horizontal partition portion 41D (extended to the front side from the vertical partition portion 40B): Horizontal partition portion (extended to the rear side from the vertical partition portion 40B) 41E: Horizontal partition portion 41F (extending forward from the vertical partition portion 40C): Horizontal partition portion 43 (extending rearward from the vertical partition portion 40C): Plate-like portion 43a (in the first embodiment) : Lower end portion 43Y (in the plate-like portion of the first embodiment): Plate-like portion 43Ya (in the second embodiment): Lower end portion 44 (in the plate-like portion of the second embodiment): Horizontally extending portion 44F: Front side Horizontally extending portion 44B: Rear laterally extending portion 46: Connection belt 47: Mounting portion 47a (disposed on the front end side of the airbag): Insertion hole 48 (in the mounting portion 47): (in the third embodiment) ) Gap 49: Recess 49Y (in the first embodiment): (Second embodiment) Recess 49Z (in the third embodiment): Recess 50 (in the third embodiment): Air bag 51 (in the second embodiment): Auxiliary inflatable portion 51b (in the second embodiment) (In the auxiliary inflatable portion of the second embodiment) Lower end portion 53: Additional inflatable portion 53a: Upper end portion 53b (in the additional inflatable portion): Lower end portion 54 (in the additional inflatable portion): Opening 56 (in the additional inflatable portion): Airbag component member 58 (in the second embodiment) : Airbag 59 (in the third embodiment): Communication hole

Claims (3)

Folded and stored on the upper edge side of the window inside the vehicle, the upper edge side is fixed to the body side of the vehicle, and includes a protective part having a protective inflating part, and can cover the window when inflated. A head protection airbag device including an airbag,
In a state where the airbag has been inflated, an auxiliary inflating portion that is inflated adjacent to the inner side of the protecting portion on the lower side of the protecting portion, and at least a portion on the upper side of the auxiliary inflating portion, A protective inflating part is separated from the protective inflating part, and a recess or a gap is formed at a position between the protective inflating part and the auxiliary inflating part, and the protective inflating part and the auxiliary inflating part are provided. An airbag device comprising: a communicating portion that communicates, wherein the communicating portion is disposed below an upper end portion of the auxiliary inflating portion . In the state where the communicating portion communicates the lower end side of the protective inflating portion and the lower end side of the auxiliary inflating portion, and the airbag is deployed in a planar shape, the protecting portion, the communicating portion, the auxiliary and expansion portion is formed integrally with the head protection air bag device according to claim 1, characterized in that it is formed by bending a bending portion of the communicating portion. In the expansion-completed state of the airbag, the upper end of the auxiliary expansion portion, of claim 1 or claim 2 that is characterized in that the are arranged so as to positioned above the lower end portion of the window The head protection airbag apparatus of any one of Claims .

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