JP2019038367A - Folding storage body for head protection airbag - Google Patents

Abstract

To provide a folding storage body for a head protection air bag, designed such that a compression part compressed including a disposed portion of a tension belt is given a thickness dimension uniform along a lengthwise direction and the head protection airbag can be easily stored even in a narrow storage portion.SOLUTION: An airbag with a tension belt 55 coupled to a vehicle pillar part of a peripheral edge of a window is folded, and a compression part is provided thereafter. The compression part is formed in such a manner that the airbag is folded in a rod shape along forward and backward directions so that a flat inflated lower edge side is located closer to an upper edge side, and then an end 21c side including a tension belt disposed portion 68 and an adjacent portion 69 is compressed so as to narrow in outside dimension. The adjacent portion 69 has a base-cloth area enlargement area 95a for approximately the capacity of the tension belt 55 as thickness adjustment means 95 such that the thickness dimensions of the tension belt disposed portion 68 and the adjacent portion 69 before compression and after folding are substantially uniform along the forward and backward directions.SELECTED DRAWING: Figure 2

Description

  The present invention folds a head protection airbag that can be inflated so as to cover the inner side of a window of a vehicle by allowing inflation gas to flow inside, and can be stored on the upper edge side of the window, and is provided with a tension belt. The present invention relates to a folded storage body for a head protection airbag in which an end side is compressed so as to reduce an outer dimension.

  Conventionally, in the head protection airbag of the head protection airbag device, the space portion generated in the center of the spirally folded body is crushed so that the head protection airbag can be stored in the narrow space portion in the front pillar portion. In some cases, a foldable storage body is formed by providing a compression section compressed in this manner (see, for example, Patent Document 1).

  Moreover, in the folding storage body of the other head protection airbag, the folding body folded in a spiral shape may be crushed flat (for example, see Patent Document 2).

International Publication No. 2012/147490 Special table 2013-514233 gazette

  However, in the conventional folding storage body, the head protection airbag may be configured by arranging a tension belt on the end side so that tension can be secured on the lower edge side when the inflation is completed. When the compression part is to be formed including the arrangement part of the tension belt, the tension belt is disposed by the volume of the tension belt, and the tension belt arrangement part is more bulky than the adjacent part adjacent in the front-rear direction after folding before compression. The compression of the part was hindered, and the compression part having a uniform small thickness dimension along the length direction could not be obtained, causing a problem that the compression part could not be stored in a narrow storage space.

  The present invention solves the above-described problem, and the compressed portion including the tension belt arrangement portion can be configured to have a uniform thickness dimension along the length direction, so that even a narrow storage portion can be easily formed. An object of the present invention is to provide a folded storage body for a head protection airbag that can be stored in a bag.

The folding storage body of the head protection airbag according to the present invention is inflated downward so as to cover the window from the upper edge side of the stored vehicle window when inflating gas flows, and at the time of completion of the expansion. A head protection air having a tension belt extending along the front-rear direction and connected to a pillar portion of the vehicle at the periphery of the window on the end side in the front-rear direction so as to ensure tension along the front-rear direction. Bag
After the flatly developed lower edge side is folded into a rod shape along the front-rear direction so that the lower edge side approaches the upper edge side, the tension belt installation site and the adjacent site adjacent to the installation site along the front-rear direction are included. A folding storage body for a head protection airbag that is provided on the side of the end portion and provided with a compression portion that is compressed so as to narrow the outer dimension, and is stored on the upper edge side of the window,
Thickness adjusting means for adjusting the thickness dimension is set to at least one of the arrangement portion of the tension belt compressed to form the compression portion and the adjacent portion,
By the thickness adjusting means, the tension belt arrangement part and the adjacent part are set so that the thickness dimension after folding before compression is substantially uniform along the front-rear direction. It is characterized by.

  In the folding storage body of the head protection airbag according to the present invention, the portion where the tension belt is disposed and the adjacent portion adjacent to the disposed portion along the front-rear direction are folded before compression by the thickness adjusting means. Since the thickness after folding is configured to be substantially uniform along the front-rear direction, press the pressing plate when forming the compression part evenly against the planned compression area after folding. Thus, the compression portion can be formed as a uniform small thickness dimension along the longitudinal direction of the front-rear direction.

  Therefore, in the folding storage body of the head protection airbag according to the present invention, the compressed portion including the tension belt arrangement portion can be configured to have a uniform thickness dimension along the length direction and is narrow. It can be easily stored even at the storage site.

  As the thickness adjusting means, the amount of use of the airbag base fabric disposed in the tension belt is less than the amount of use of the airbag base fabric disposed in the adjacent portion. The configuration can be exemplified.

  Alternatively, as the thickness adjusting means, the fineness of the airbag base fabric disposed in the tension belt is determined from the fineness (thread thickness) of the airbag base fabric disposed in the adjacent portion. It is possible to exemplify a configuration in which the thickness is reduced and adjusted.

  Further, as the thickness adjusting means, the tension belt can be adjusted based on the coating amount of the coating agent for ensuring gas non-permeability or heat resistance to be applied to the airbag fabric disposed in the adjacent portion. It can also be set as the structure adjusted by reducing the coating amount applied to the base fabric for airbags arrange | positioned in an arrangement | positioning site | part.

It is the schematic front view which looked at the head protection airbag apparatus using the folding storage body of the head protection airbag which is one Embodiment of this invention from the vehicle inner side. It is a front view of the state where the head protection airbag which constitutes the folding storage object of an embodiment was developed flat. It is a schematic cross-sectional view at the time of expansion of the head protection airbag of the embodiment, and corresponds to the III-III portion of FIG. It is the schematic explaining the folding process of the airbag of embodiment. It is the schematic explaining the state which winds an airbag around the core at the time of carrying out roll folding of the airbag of embodiment. It is the schematic explaining the state which removes a core from the roll-folded airbag. It is the schematic explaining the process of forming the compression part of the folding storage body of embodiment. It is a figure which shows the state which wraps a cover material and a collapse prevention material, after folding the airbag of embodiment and forming a folding storage body. It is the schematic front view seen from the vehicle inside which explains at the time of operation of the head protection airbag device using the folding storage object of an embodiment. It is a schematic sectional drawing explaining in order the operation | movement time of the head protection airbag apparatus using the folding storage body of embodiment, and shows the site | part of a primary expansion | deployment area (non-compression part). It is a schematic sectional drawing explaining in order the action | operation time of the head protection airbag apparatus using the folding storage body of embodiment, and shows the site | part of a secondary expansion area (compression part). It is a front view of the state where the air bag used for the folding storage object of the modification of an embodiment was developed flat. It is a figure which shows the state which wraps a cover material and a collapse prevention material after folding the airbag shown in FIG. 12 and forming a folding storage body. It is a front view of the state which unfolded flat the air bag used for the folding storage object of other modifications of an embodiment. It is a figure which shows the state which wraps a cover material and a collapse prevention material after folding the airbag shown in FIG. 14 and forming a folding storage body. It is a figure explaining the process of folding the airbag of the further another modification of embodiment and forming a folding storage body.

  DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment of the present invention will be described with reference to the drawings. A foldable storage body 70 of a head protection airbag 20 (hereinafter, abbreviated as an airbag as appropriate) according to the embodiment includes a head protection shown in FIG. Used in the airbag device M. As shown in FIG. 1, the head protecting airbag device M includes an airbag 20, an inflator 14, mounting brackets 11 and 16, and an airbag cover 9. As shown in FIG. 1, the airbag 20 is a folding storage body 70, on the upper edge side of the windows W <b> 1 and W <b> 2 inside the vehicle V, from the lower edge 4 a side of the front pillar portion FP, and the roof side rail portion RR. It is stored up to the region above the rear pillar portion RP through the lower edge 5a side. In the embodiment, the airbag 20 is configured to protect the occupant's head at the time of a side collision of the vehicle V or at the time of rollover. Further, the vehicle V is configured by arranging windows W1 and W2 on the sides of the front seat and the rear seat, respectively.

  The airbag cover 9 includes lower edges 4a and 5a of a front pillar garnish 4 disposed on the front pillar portion FP and a roof head lining 5 disposed on the roof side rail portion RR. The front pillar garnish 4 and the roof head lining 5 are made of synthetic resin and are fixedly mounted on the vehicle inner side of the inner panel 2 on the body (vehicle body) 1 side. As shown in FIGS. 10 and 11, the airbag cover 9 is disposed so as to cover the vehicle interior I of the airbag 20 (folded storage body 70) that is folded and stored. The air bag 20 is disposed so as to be opened to the vehicle interior side I by being pushed.

  The inflator 14 supplies inflation gas to the airbag 20 and is provided with a gas discharge port (not shown) capable of discharging inflation gas on the tip side as a substantially cylindrical cylinder type. The inflator 14 inserts the tip side including the vicinity of the gas discharge port into an inlet port 23 described later of the airbag 20, and uses the clamp 15 disposed on the outer peripheral side of the inlet port 23 to attach the airbag 20 to the airbag 20. Are connected to each other. Further, the inflator 14 uses a mounting bracket 16 for holding the inflator 14 and a bolt 17 for fixing the mounting bracket 16 to the inner panel 2 on the body 1 side, and above the window W2 in the inner panel 2. (See FIG. 1). The inflator 14 is electrically connected to a control device (not shown) of the vehicle V via a lead wire (not shown), and when the control device detects a side collision or rollover of the vehicle V, the inflator 14 An operation signal is input to be operated.

  Each mounting bracket 11 is composed of two sheet metal plates, and is attached to each mounting portion 44, 56 so as to sandwich each mounting portion 44, 56 (to be described later) of the airbag 20 from the front and back. 12, the mounting portions 44 and 56 are fixedly mounted on the inner panel 2 on the body 1 side (see FIGS. 1, 2 and 10).

  As shown in the two-dot chain line in FIG. 1 and FIGS. 2 and 9, the airbag 20 flows inflating gas from the inflator 14 and expands from the folded state to open the windows W 1, W 2, and the center. The pillar portion CP and the rear pillar portion RP expand and expand so as to cover the inner sides of the pillar garnishes 6 and 7. Specifically, the airbag 20 has an outer shape in the front-rear direction so that the outer shape of the airbag 20 can be covered from the window W1 to the front side of the rear pillar RP through the center pillar CP and the window W2. In the case of the embodiment, as shown in FIGS. 1 and 9, the lower edge 21b when the expansion is completed is below the belt line BL composed of the lower edges of the windows W1 and W2. It is comprised so that it may be located in. In the case of the embodiment, as shown in FIG. 2, the airbag 20 is disposed on the bag body 21, the inner tube 53 disposed in the inlet 23 of the bag body 21, and the front end 21 c side of the bag body 21. And a tension belt 55 provided.

  As shown in FIGS. 2 and 3, the airbag fabric 58 constituting the bag body 21 is integrally manufactured by bag weaving using polyamide yarn, polyester yarn or the like in the embodiment. Furthermore, the bag main body 21 is inflated by flowing an inflating gas G into the bag so as to separate the vehicle inner wall portion 22a located on the vehicle inner side I and the vehicle outer wall portion 22b located on the vehicle outer side O when the expansion is completed. The gas inflow part 22 (refer FIG. 3, 10) and the non-inflow part (closed part) 41 which does not allow the expansion gas G to flow in are provided.

  The gas inflow portion 22 includes a shield expansion portion 24 that expands so as to cover the inside of the windows W1 and W2, and a cylindrical inlet portion that is connected to the inflator 14 so as to supply expansion gas to the shield expansion portion 24. 23. The inflow port portion 23 is disposed in the vicinity of the center in the front-rear direction on the upper edge 21a side of the bag body 21, and an inner tube 53 that improves heat resistance is disposed therein. The inflow port 23 is connected to the inflator 14 by fitting the clamp 15 on the outer peripheral side in a state where the inflator 14 is inserted from the opening 23a on the rear end side.

  The shield inflating portion 24 is disposed above the inflating main body portions 31 and 35 on the upper edge side of the shielding inflating portion 24 and a plurality (two in the embodiment) of the inflating main body portions 31 and 35 arranged in parallel along the front-rear direction. Gas guide flow path 29 to be configured. The gas guide channel 29 communicates with the inflow port portion 23 and is arranged so that the expansion gas G introduced from the inflow port portion 23 can be guided to the front and rear expansion body portions 31 and 35.

  The front expansion main body 31 includes a front protective expansion portion 32 that covers the vehicle interior side of the portion of the window W1 on the side of the head of the occupant seated in the front seat, and an auxiliary expansion that expands on the rear side of the front protective expansion portion 32. And a portion 33. The front protective expansion portion 32 expands by inflating the expansion gas G from the supply port 31a on the front end side of the gas guide channel 29, and the auxiliary expansion portion 33 is expanded by the front end communication port 33a. The expansion gas G from the front protective expansion portion 32 passing through the communication port 33a is caused to flow and expand.

  The rear inflating main body portion 35 is inflated on the lower front side of the rear protective inflating portion 36 and the rear protective inflating portion 36 that covers the vehicle interior side of the portion of the window W2 on the side of the head of the occupant seated in the rear seat. And an auxiliary inflating portion 37. The rear protective expansion portion 36 is inflated by flowing the expansion gas G from the supply port 35a on the rear end side of the gas guide channel 29, and the auxiliary expansion portion 37 is rear protected by the communication port 37a on the rear end side. The expansion gas 36 communicates with the expansion portion 36 and expands by flowing the expansion gas G from the protective expansion portion 36 after passing through the communication port 37a.

  The auxiliary expansion parts 33 and 37 serve as pressure regulating chambers for the front protective expansion part 32 and the rear protective expansion part 36, and the front protective expansion part 32 and the rear protective expansion part 36 when the passenger head is received. When the internal pressure is suddenly increased, the expansion gas G is caused to flow from the front protective expansion portion 32 or the rear protective expansion portion 36 so that the rapid increase in internal pressure can be suppressed.

  In addition, an end-side inflating portion 39 that is partitioned from the front protective inflating portion 32 by a partitioning portion (end-side partitioning portion) 51 to be described later is disposed on the front end side of the shielding inflating portion 24. An inflow port 39 a disposed between the upper end 51 a of the partition portion 51 and an upper edge 42 a of a peripheral portion 42 described later is disposed on the upper side of the end-side inflating portion 39. Expands by flowing the expansion gas G from the front protective expansion portion 32 of the expansion main body portion 31 through the inflow port 39a. The end-side inflating portion 39 is arranged so that the front seat occupant can catch and protect the head of the occupant when the vehicle V is offset and crashes and the front seat occupant moves diagonally forward of the vehicle exterior O. ing.

  Further, in the case of the embodiment, as shown in FIGS. 2 and 3, the end-side inflating portion 39 has a tension belt 55 disposed on the vehicle outer side O when the airbag 20 is completely inflated. When forming the compression portion 74, a part of the compression belt 74 is compressed together with the tension belt 55.

  In the embodiment, the part that forms the compression part 74 is a part that is accommodated in the front pillar part FP, and is a starting point PS in the vicinity of the front side of the attachment part 44 (F) on the front end side described later (FIG. 2). , 8) to the area on the front side of the airbag 20, and the area ahead of the starting point PS is the compression planned area 67. The planned compression region 67 includes a front end portion 32a of the front protective inflating portion 32, an end side inflating portion 39 in which the tension belt 55 is disposed on the vehicle outer side O, and a non-inflow portion (closing portion) 41 disposed around them. (The front side portion 42d) and the region of the tension belt 55 itself.

  Further, in the case of the embodiment, the front end portion 32 a of the front protective inflating portion 32 is provided with the end side inflating portion 39 and the front protective inflating portion 32 in order to arrange the airbag base fabric 58 corresponding to the approximate volume of the tension belt 55. The lower end extending portion 32b extends downward from the general portion 32c on the rear side of the front end portion 32a.

  Furthermore, in the case of the embodiment, when the inflating gas G flows into the airbag 20, the portion of the planned compression region 67 is removed so that the deployment direction is stabilized and the windows W1 and W2 can be covered quickly. The gas guide channel 29 and the expansion main body portions 31 and 35 are set as the primary expansion area 26, and the portion of the planned compression area 67 that expands and expands after being compressed is the secondary expansion area 27. It is set.

  The non-inflow part 41 is arranged in the region of the gas inflow part 22 with a peripheral part 42 constituting the outer peripheral edge of the gas inflow part 22, a mounting part 44, and partition parts 47, 48, 49, 51.

  The peripheral edge portion 42 is arranged so as to surround the periphery of the gas inflow portion 22 over the entire circumference except for the opening 23 a on the rear end side of the inlet port portion 23. The attachment portion 44 is a portion for attaching the upper edge 21a side of the bag body 21 to the inner panel 2 on the body 1 side, and protrudes upward from the upper edge 42a of the peripheral edge portion 42 on the bag body 21 upper edge 21a side. As described above, a bag-woven airbag base fabric 58 and a separate cloth material (woven fabric) are attached, and a plurality of the fabrics are arranged along the front-rear direction. In the case of the embodiment, two attachment portions 44 are arranged on the front side of the inlet portion 23 including the attachment portion 44F on the front end side, and two on the rear side of the inlet portion 23. ing. Each mounting portion 44 is provided with a mounting hole 44a through which the mounting bolt 12 can be inserted.

  The partition portion 47 includes a vertical bar portion 47a that is disposed so as to be curved and extend upward from the vicinity of the center in the front-rear direction on the lower edge 42b of the peripheral edge portion 42, and a horizontal bar portion that extends forward at the upper end of the vertical bar portion 47a. 47b, and a central partition 47 having the same structure. The vertical bar portion 47a divides the auxiliary expansion portion 33 of the front expansion body portion 31 and the rear expansion body portion 35 (auxiliary expansion portion 37, rear protective expansion portion 36), and the horizontal rod portion 47b. Forms the lower edge side of the gas guide channel 29, and partitions the auxiliary expansion portion 33 and the gas guide channel 29.

  The partition portion 48 forms the lower edge side of the communication port 33 a and extends upward from the lower edge 42 b of the peripheral portion 42 to partition the front protective expansion portion 32 and the auxiliary expansion portion 33. Is configured. The partition portion 49 forms the lower edge side of the communication port 37 a and extends upward from the lower edge 42 b of the peripheral edge portion 42 to partition the auxiliary expansion portion 37 and the rear protective expansion portion 36. Is configured.

  The partition portion 51 constitutes an end-side partition portion 51 that partitions the end-side expansion portion 39 and the front protective expansion portion 32, and is arranged so as to extend upward from the front portion side of the lower edge 42b of the peripheral edge portion 42. It is installed. The upper end 51a does not reach the upper edge 42a side of the peripheral portion 42, but is provided with an inlet 39a for allowing the expansion gas G to flow into the end-side expansion portion 39 between the upper edge 42a of the peripheral portion 42. As shown in FIG.

  The tension belt 55 is separated from the bag body 21 and is made of a flexible sheet material. In the embodiment, the tension belt 55 is made of a woven fabric made of polyamide yarn, polyester yarn, or the like. The tension belt 55 is coupled to the bag body 21 at the base portion 55b side, and the front end 55a side at the body 1 side of the vehicle V at the periphery of the window W1 away from the front end 21c of the bag body 21. It is fixedly attached to the inner panel 2 on the body 1 side at the site of the pillar part FP. The tension belt 55 generates a tension along the front-rear direction on the lower edge 21b side of the bag body 21 so that the movement of the occupant received by the bag body 21 upon completion of inflation toward the vehicle outer side O can be suppressed. . Further, in the case of the embodiment, the tension belt 55 is arranged on the vehicle outer side O of the end side inflating portion 39 when the expansion is completed, and the base portion 55b side is used on the vehicle outer side O of the end side partition portion 51 by using a suture thread. Are sewn (bonded) to the part. An attachment portion 56 is disposed on the tip 55a side of the tension belt 55. The attachment portion 56 is a portion that is attached to the inner panel 2 using the attachment bracket 11 and the attachment bolt 12, similarly to the attachment portion 44 formed on the bag body 21, and the attachment bolt 12 can be inserted through the attachment portion 56. A mounting hole 56a is provided.

  In the case of the embodiment, an end side inflating portion 39 on the front end 21c side of the bag body 21 including the tension belt 55, a front end portion 32a having a downward extending portion 32b in the front protective inflating portion 32, and a non-inflow portion. 41, the area of the front side portion 42 d ahead of the starting point PS including the end-side partition portion 51 and the peripheral edge portion 42 (the secondary development area 27 and the compression planned region 67) is used as a compression portion 74. The folding storage body 70 is formed by using the gas guide channel 29 and the expansion main body portions 31 and 35 as non-compressed portions 71. In addition, the area of the compression part 74 is the front end part 70a of the folding storage body 70, that is, the front end 21c side of the airbag 20, as shown in FIG. 1, the front pillar garnish 4 of the front pillar part FP in a narrow storage space. And it is set as the structure accommodated in the site | part covered with the roof head lining 5 of the front end side.

  Next, the process of folding the airbag 20 and forming the compression part 74 to form the folded housing 70 will be described. First, in the folding process of the airbag 20, the base cloth 58 of the bag body 21 in a state where the vehicle inner side wall portion 22a and the vehicle outer side wall portion 22b are flattened so as to overlap each other is shrunk in the vertical dimension. The bag foldable body 60 is formed by folding it so that the lower edge 21b side approaches the upper edge 21a side. Specifically, in the embodiment, as shown in FIGS. 4A and 4B, two portions of the gas guide channel 29 on the upper edge 21a side of the bag body 21 are arranged so as to be substantially along the front-rear direction. Folded at the folds L1 and L2 and folded in a bellows, the region below the gas guide channel 29 extends from the state in which the vehicle inner wall portion 22a and the vehicle outer wall portion 22b are overlapped, with the lower edge 21b facing the vehicle outer side O. It is folded by roll folding like winding (see AC in FIG. 4). The folding process will be described in more detail. The flattened bag body 21 is set on a mounting table of a folding machine (not shown), and a folding plate (not shown) is used to place the gas guide channel 29 in the front-rear direction. The bellows fold region 61 is formed by folding the two folds L1 and L2 substantially along the folds at the folds L1 and L2. And the roll folding part 62 is formed substantially simultaneously with the formation of the bellows folding part 61. In the embodiment, as shown in FIG. 5, the roll folding portion 62 is formed using a long cylindrical winding core 80 provided with a large number of intake holes 80 a capable of sucking air A. More specifically, FIG. 5 shows a surface of the base fabric 58 in a state in which the vehicle interior side wall portion 22a and the vehicle exterior wall portion 22b are flattened so as to overlap with each other on the vehicle outer wall portion 22b side on the lower edge 21b side of the bag body 21. As shown in A and B, the winding core 80 is disposed, and the winding core 80 is rotated while sucking the air A from the intake hole 80a so that the bag body 21 is adsorbed to the outer peripheral surface of the winding core 80. Then, the base fabric 58 at the portion on the lower edge 21b side of the bag body 21 is wound around the winding core 80 (see A in FIG. 6). Thereafter, as shown in FIG. 6B, air A is discharged from the intake hole 80a, and a slight gap is formed between the winding core 80 and the bag body 21 (base cloth 58). If it pulls out, the roll folding part 62 can be formed under the bellows folding part 61, and the bag folding body 60 can be formed (refer A of FIG. 8). In the roll folding part 62, as shown in FIG. 7A, a space part H corresponding to the volume of the winding core 80 is generated at the center.

  In the bag folded body 60, as described above, the region of the end side inflating portion 39 including the tension belt 55 and the front end portion 32a of the front protective inflating portion 32 is compressed into a region to be compressed 67 (see A in FIG. 8). This planned compression area 67 is provided with a base fabric 58 corresponding to the approximate volume of the tension belt 55 at the front end 32a of the front protective inflating section 32, and is configured to extend downward as a thickness adjusting means 95. A portion 32b is formed (see FIG. 2). That is, the downward extending portion 32 b constitutes a base fabric area expansion area 95 a that increases the amount of use of the base fabric 58 as the thickness adjusting means 95, and the scheduled compression area 67 of the folded bag folded body 60. A belt arrangement site (a site on the front side of the end-side partition 51) 68 on which the tension belt 55 is arranged, and an adjacent site 69 adjacent to the belt installation site 68 in the front-rear direction (the front end of the front protective expansion portion 32) Part 32a) is continuous with the same thickness dimension (outer dimensions, thickness dimension) d1.

  Although not shown, the tension belt 55 is roll-folded together with the base fabric 58 of the end side inflating portion 39 to form a roll folding portion 62.

  Subsequently, the compression compression area | region 67 of the bag folding body 60 which folded the airbag 20 is heat-pressed using the bag heating compressor 85 shown in FIG. First, as shown to A and B of FIG. 7, the compression plan area | region 67 of the bag folding body 60 is pushed in in the recessed part 87 of the fixed mold | type 86 of the bag heating compressor 85. FIG. At this time, the opening dimension B1 between the both side surfaces 89, 90 of the recessed portion 87 of the fixed mold 86 is such that the bellows fold portion 61 is not folded so as to warp the folds L1, L2 upward. The bag folded body 60 that is set to be smaller than the outer dimension (width dimension) D1 in the direction and is pushed into the recess 87 is housed in the recess 87 of the fixed mold 86 with the space portion H being slightly crushed in the left-right direction. Is done. Further, when the bag folding body 60 is pushed into the recess 87, the bellows fold portion 61 is disposed on the side away from the bottom surface 88 of the recess 87, that is, on the opening 87a side of the recess 87, and the roll fold portion 62 is The bottom surface 88 and both side surfaces 89 and 90 are pushed in so as to be brought into contact therewith.

  Next, as shown in FIGS. 7B and 7C, the bellows of the bag foldable body 60 is viewed from above so that the push plate 93 of the movable die 92 is inserted into the recess 87 and the push plate 93 is brought close to the bottom surface 88. The bag folded body 60 is compressed by pressing against the folding part 61 and heated for a predetermined time using a heater (not shown) to form the compression part 74. At this time, in the scheduled compression area 67, the pressing plate 93 is pressed against the both side surfaces 89 and 90 to press the bellows folding part 61 and the part where the upper and lower base fabrics 58 of the roll folding part 62 are stacked, That is, although the upper laminated portion 63 and the lower laminated portion 64 are in a state along the push plate 93 and the bottom surface 88, the lateral side laminated portions 65 and 66 in the left-right direction (width direction) of the roll folding portion 62 are spaces. Bending portions 65a and 66a that are close to each other are provided so as to crush the portion H from the left and right, and are bent to form the compression portion 74.

  Therefore, the compression unit 74 crushed the space part H at the center of the roll folding part 62, and the left and right side-side laminated parts 65 and 66 are respectively arranged between the upper and lower upper laminated parts 63 and the lower laminated part 64. The bent portions 65a and 66a formed by bending the vicinity of the center in the vertical direction are bent so as to contact each other while maintaining the state in which the upper stacked portion 63 and the lower stacked portion 64 are pressed. The space portion H disappears, and the cross-sectional shape in the direction perpendicular to the axis is made smaller than before processing. In the case of the embodiment, the compression unit 74 is compressed so that the outer dimension of the cross section is approximately 70 to 80% in the vertical direction and the horizontal direction of the external dimension of the compression planned region 67 before compression. It becomes. Further, at the time of the heat compression, the base fabric 58 (the vehicle inner wall portion 22a and the vehicle outer wall portion 22b) itself constituting the bag main body 21 is also compressed, and is not folded. It becomes thinner than the base fabric 58 (the vehicle inner wall portion 22a and the vehicle outer wall portion 22b) constituting the portion of the uncompressed portion 71 of the storage body 70. The bag heating compressor 85 is configured to compress the bag folded body 60 with a predetermined pressing force while raising the temperature to about 100 ° C.

  After the compression part 74 is formed by the bag heating compressor 85, the compression part 74 is maintained while maintaining the compression state of the compression part 74 using a bag cooling compressor (not shown) so that the restoration of the base fabric 58 is suppressed. If 74 is cooled, the folding storage body 70 can be formed. The compression part 74 formed in this way is formed as a uniform thickness dimension d2 (see B in FIG. 8) along the length direction in the front-rear direction.

  After forming the foldable storage body 70, as shown in FIGS. 8B and 8C, a cover material 78 made of a tape material which is provided with an adhesive on the back surface side and can be broken, and a folding prevention material 77, It winds around a predetermined part so that the outer peripheral surface of the folding storage body 70 may be wrapped. The collapse preventing material 77 is wound around a plurality of locations of the folding storage body 70, and the cover material 78 is wound around the boundary portion 72 between the compression portion 74 and the uncompressed non-compression portion 71 of the folding storage body 70. .

  Thereafter, the inflator 14 to which the mounting bracket 16 has been attached is connected to the inlet 23 of the airbag 20 by using the clamp 15, and the mounting bracket 11 is fixed to each of the mounting portions 44 and 56 to An assembly is formed.

  Next, the mounting brackets 11 and 16 are arranged at predetermined positions on the inner panel 2 on the body 1 side, and are fastened with bolts 12 and 17. A lead wire (not shown) extending from a predetermined control device for operating the inflator is attached to the inflator 14. Connect the front pillar garnish 4 and roof head lining 5 to the inner panel 2 on the body 1 side, and attach the pillar garnishes 6 and 7 to the inner panel 2 on the body 1 side. It can be mounted on the vehicle V.

  After the head protection airbag device M is mounted on the vehicle V, if the inflator 14 is activated in response to an operation signal from the control device at the time of a side collision or rollover of the vehicle V, the inflator 14 is discharged. The inflating gas flows into the airbag 20 (bag body 21), and the inflating airbag 20 (bag body 21) breaks the collapse preventing material 77 and the cover material 78, and further, the front pillar. The airbag cover 9 composed of the lower edges 4a and 5a of the garnish 4 and the roof head lining 5 is pushed open and expanded downward so as to cancel the folding, and the two-dot chain line and figure of FIG. As shown to 9-11, it will expand | swell greatly so that the windows W1, W2, center pillar part CP, and some vehicle interior I of the rear pillar part RP may be covered.

  More specifically, in the foldable container 70 of the head protection airbag 20 of the embodiment, the inflation gas G from the inflator 14 flows from the inlet 23 into the gas guide channel 29 of the shield inflation 24, As shown in FIGS. 10A, 10B, and 10C, in the primary development area 26, the folds L1 and L2 of the bellows fold region 61 are eliminated and the gas guide channel 29 flows in the front and rear sides to be supplied. It flows into the mouths 31a and 35a, flows into the inflating main body parts 31 and 35 from the supply ports 31a and 35a, cancels roll folding of the roll folding part 62, and opens the lower edge 21b side of the bag body 21 to the windows W1 and W2. As a deployment behavior that does not interfere with the occupant, the deployment behavior is to inflate and expand without being projected to the vehicle inner side I, that is, in a direction that extends along the vehicle, that is, close to the windows W1 and W2. Shield expansion part 24 It is possible to open expansion. On the other hand, in the secondary development area 27 provided with the compression unit 74, as shown in A, B, and C of FIG. 11, the folds L1 and L2 of the bellows fold region 61 are eliminated, and the roll fold region 62 Since the compression portion 74 which is intended to be expanded and inflated after releasing the folding but being compressed and difficult to rapidly expand and expand is provided from the primary expansion area 26 as shown in A, B and C of FIG. With a delay, it expands and expands so as to follow the primary expansion area 26. However, even if the secondary expansion area 27 is delayed and expanded, the primary expansion area 26 that covers the windows W1 and W2 has already been expanded and expanded due to the predetermined expansion behavior by eliminating the folding of the roll fold. As a result, the passenger's head approaching the windows W1, W2 can be quickly received and protected.

  As described above, in the folding storage body 70 of the head protection airbag 20 of the embodiment, the arrangement portion 68 of the tension belt 55 and the adjacent portion 69 adjacent to the arrangement portion 68 along the front-rear direction are as follows. Since the thickness adjustment means 95 is configured so that the thickness dimension d1 after folding before compression is substantially uniform along the front-rear direction, the pressing plate 93 when forming the compression portion 74 is formed. The compression portion 74 can be evenly pressed against the compressed compression area 67 after being folded, and the compression portion 74 can be formed as a uniform thickness dimension d2 (see B in FIG. 8) along the longitudinal direction. .

  Therefore, in the folding storage body 70 of the head protection airbag 20 according to the embodiment, the compressed portion 74 including the arrangement portion 68 of the tension belt 55 is compressed with a uniform thickness dimension (outer shape) along the length direction. (Dimension, thickness dimension) d2 and can be easily housed even in the front pillar portion FP of a narrow housing portion.

  In the embodiment, as the thickness adjusting means 95, the portion 68 where the tension belt 55 is disposed is determined based on the amount of the airbag base fabric 58 disposed on the front end portion 32a of the front protective inflation portion 32 in the adjacent portion 69. This is an adjusting means for reducing the amount of use of the airbag fabric 58 disposed in the end-side inflating portion 39. That is, the thickness adjusting means 95 adjusts the difference of the substantial volume of the tension belt 55 so as not to occur between the belt disposing portion 68 and the adjacent portion 69. In the embodiment, the tension belt 55 is adjusted. The lower extending portion 32b is provided so that a base fabric area expansion area 95a that increases the usage amount of the base fabric 58 is provided in the adjacent portion 69, and the difference in the volume of the tension belt 55 is caused by the belt arrangement. Adjustment is made so as not to occur at the installation portion 68 and the adjacent portion 69.

  Further, thickness adjusting means 97 and 99 shown in FIG. 12 and FIG. 14 are illustrated as examples of adjusting the difference of the substantial volume of the tension belt 55 so as not to occur between the belt disposing portion 68 and the adjacent portion 69. it can.

  In the thickness adjusting means 97 shown in FIG. 12, in the bag body 21A of the airbag 20A, the tension belt 55 is disposed based on the fineness (thickness of the thread) of the airbag base fabric 58 disposed in the adjacent portion 69. The fineness of the airbag base fabric 58 disposed in the portion 68 is reduced, that is, the placement portion 68 is adjusted as the fine thread use area 97a.

  Specifically, the bag body 21A is woven (bag woven) with warps LS arranged along the front-rear direction and wefts VS arranged along the up-down direction to form the base fabric 58. From the thickness dS1 of the weft VS of the airbag base fabric 58 provided in the adjacent portion 69 of the airbag 20A, the airbag base fabric 58 provided in the location 68 of the tension belt 55 is provided. The thickness dS2 of the weft VS is reduced (dS1> dS2), and the difference in the approximate volume of the tension belt 55 is set so as not to appear between the belt arrangement portion 68 after being folded and the adjacent portion 69. Has been. Therefore, when the airbag 20A is folded in the same manner as in the embodiment to form the bag folded body 60A, as shown in FIG. 13A, the belt arrangement portion 68 and the adjacent portion 69 are arranged. The region 67 is configured so that the thickness dimension d1 is substantially uniform along the front-rear direction. Further, when the compression portion 74A is formed thereafter, the pressing plate 93 is moved to the compression planned region 67 after folding. The compressed portion 74A can be formed with an equal thickness dimension d2 (see B in FIG. 13) along the longitudinal direction in the front-rear direction.

  Therefore, even in the foldable container 70A of the airbag 20A, the compressed portion 74A compressed including the arrangement portion 68 of the tension belt 55 is compressed along the length direction with an equal thickness dimension (outer dimensions, thickness dimensions). ) It can be configured as d2, and can be easily housed even in the front pillar portion FP of a narrow housing portion.

  The thickness adjusting means 99 shown in FIG. 14 ensures gas impermeability or heat resistance applied to the airbag fabric 58 disposed in the adjacent portion 69 in the bag body 21B of the airbag 20B. The coating amount V2 to be applied to the airbag base fabric 58 disposed in the disposition site 68 of the tension belt 55 is less than the coating amount V1 of the coating agent 98 (for example, the urethane coating agent 98). That is, the arrangement site 68 is adjusted as the coat amount reduction area 99a.

  Specifically, the thickness dimension t1 of the coating agent 98 applied to the adjacent part 69 is made thicker than the thickness dimension t2 of the coating agent 98 applied to the arrangement part 68 (t1> t2). The coating amount V1 applied to the tension belt 55 is set to be larger than the coating amount V2 applied to the arrangement site 68 by the approximate volume of the tension belt 55. Therefore, when the airbag 20B is folded in the same manner as in the embodiment to form the bag folded body 60B, as shown in FIG. 15A, the belt arrangement portion 68 and the adjacent portion 69 are arranged. The region 67 is configured so that the thickness dimension d1 is substantially uniform along the front-rear direction, and then, when the compression portion 74B is formed, the push plate 93 is moved to the compression planned region 67 after folding. The compression portion 74B can be formed with a uniform thickness dimension d2 (see B in FIG. 15) along the longitudinal direction in the front-rear direction.

  Therefore, even in the foldable container 70B of the airbag 20B, the compressed portion 74B compressed including the arrangement portion 68 of the tension belt 55 has a uniform thickness dimension (outer dimension, thickness dimension) along the length direction. ) It can be configured as d2, and can be easily housed even in the front pillar portion FP of a narrow housing portion.

  In addition, as shown to C of FIG. 7, the compression part 74 of embodiment provides the bellows-like compression part 75 which crushed the bellows folding part 61 which provided the creases L1, L2 in the upper surface 74a side, and is bellows-like. Immediately below the compression part 75, a roll-like compression part 76 is provided by crushing the roll folding part 62, and the bellows-like compression part 75 serving as the upstream part of the inflowing expansion gas is provided with a recessed part. Instead, the folds L1 and L2 of the accordion fold region 61 are overlapped and simply compressed in the vertical direction. Therefore, when the compression portion 74 is expanded and inflated, the bellows-like compression portion 75 including the bellows folding portion 61 on the upstream side of the inflowing expansion gas G causes the folds L1 and L2 as shown in FIGS. In order to eliminate, it is possible to swell and push the roll-shaped compressing portion 76 downward in a smooth manner along the window W1 while stabilizing the unfolding direction.

  Further, the roll-shaped compression portion 76 composed of the extruded roll folding portion 62 has the space portion H at the center of the roll folding portion 62 crushed from the top, bottom, left and right, particularly from the left and right. The upper laminated portion 63 and the lower laminated portion 64 of the left and right side laminated portions 64 are crushed from above and below, and the bent portions 65a and 66a of the left and right side laminated portions 65 and 66 enter so as to eliminate the space portion H, It is formed as a substantially quadrangular prism shape (substantially a regular quadrangular prism shape) from which the portion H has disappeared. Therefore, when the roll-shaped compression portion 76 is unfolded and swells, the upper-side laminated portion 63, the side-side laminated portion 65 having the bent portion 65a, the lower-side laminated portion 64, and the side surface having the bent portion 66a. A roll so that the expansion gas G is allowed to flow into the portion of the gas inflow portion 22 (the end side expansion portion 39 or the front end portion 32a of the front protective expansion portion 32) on the outer surface side in the side laminated portion 66 to unwind. The folding is canceled and the lower edge 21b expands and expands. Therefore, the rotation of the roll-shaped compression unit 76 when canceling the folding is substantially uniform without changing the rotation radius from the center of rotation to a substantially square shape (substantially a regular square shape). Can be smoothly rotated to eliminate folding. As a result, on the basis of the extrusion direction along the window W1 when the accordion-like compression part 75 is released from the fold, the state where the roll fold is released while approaching the window W1 is achieved. The protrusion to the inner side I can be suppressed and the expansion direction can be expanded and stabilized to the lower edge 21b side.

  If the above points are not taken into consideration, the compression mode of the compression part is not limited to the embodiment, and the space part H of the roll folding part 62 may be crushed and the cross-sectional shape may be smaller than that of the non-compression part 71.

  Further, in the embodiment, as the folding step of bringing the lower edge 21b side of the airbag 20 closer to the upper edge 21a side, the width dimension in the vertical direction is reduced by roll folding and bellows folding that wind toward the vehicle outer side. However, as long as the lower edge 21b is folded so as to approach the upper edge 21a, the present invention is not limited to the embodiment, and the upper and lower regions may be folded by bellows folding.

  Furthermore, in the embodiment, the tension belt 55 is disposed so as to extend forward from the partition portion 51 across the inflated portion (the end-side inflatable portion 39). However, like the airbag 20C illustrated in FIG. In addition, the tension belt 55 may be disposed on the front edge 42c of the peripheral edge portion 42 of the non-inflow portion 41 without straddling the expansion portion.

  In the airbag 20C, the belt arrangement portion 68 of the tension belt 55 is a portion of the front edge 42c of the peripheral portion 42 in the bag body 21C, and the adjacent portion 69 is the end-side inflating portion 39 and the partition portion 51 in the bag body 21C. And a portion of the front end portion 32a of the front protective expansion portion 32.

  The thickness adjusting means 96 includes a base fabric area enlargement area 96a and a coat amount adjustment area 96b (the belt arrangement portion 68 side is a coat amount decrease area 96c, and the adjacent portion 69 side is a coat amount increase area 96d. ) And a combination.

  If the airbag 20C is also folded in the same manner as in the embodiment to form the bag folded body 60C, as shown in FIG. 16B, the belt arrangement portion 68 and the adjacent portion 69 are arranged. The region 67 is configured so that the thickness dimension d1 is substantially uniform along the front-rear direction. Further, when the compression portion 74C is formed thereafter, the pressing plate 93 is moved to the compression planned region 67 after folding. The compression portion 74C can be formed with a uniform thickness dimension d2 (see C in FIG. 16) along the length direction in the front-rear direction.

  Therefore, even in the foldable container 70C of the airbag 20C, the compressed portion 74C compressed including the portion 68 of the tension belt 55 is compressed along the length direction with a uniform thickness dimension (outer dimension, thickness dimension). ) It can be configured as d2, and can be easily housed even in the front pillar portion FP of a narrow housing portion.

20, 20A, 20B, 20C ... airbag, 21, 21A, 21B, 21C ... bag body, 21a ... upper edge, 21b ... lower edge, 55 ... tension belt, 58 ... base fabric for airbag, 60, 60A, 60B , 60C ... bag folding body, 67 ... planned compression area, 68 ... belt arrangement part, 69 ... adjacent part, 70, 70A, 70B, 70C ... folding storage body, 74, 74A, 74B, 74C ... compression part, 95, 96 ... Thickness adjusting means, 95a ... Base fabric area expansion area, 97 ... Thickness adjusting means, 97a ... Fine yarn use area, 98 ... Coating agent, 99 ... Thickness adjusting means, 99a ... Coat amount reduction area.

Claims (4)

When inflating gas flows in, it expands and inflates downward from the upper edge side of the stored vehicle window to cover the window, and can secure tension along the front-rear direction on the end side in the front-rear direction when expansion is completed A head protection airbag comprising a tension belt that extends along the front-rear direction and is connected to the pillar portion of the vehicle at the periphery of the window,
After the flatly developed lower edge side is folded into a rod shape along the front-rear direction so that the lower edge side approaches the upper edge side, the tension belt installation site and the adjacent site adjacent to the installation site along the front-rear direction are included. A folding storage body for a head protection airbag that is provided on the side of the end portion and provided with a compression portion that is compressed so as to narrow the outer dimension, and is stored on the upper edge side of the window,
Thickness adjusting means for adjusting the thickness dimension is set to at least one of the arrangement portion of the tension belt compressed to form the compression portion and the adjacent portion,
By the thickness adjusting means, the tension belt arrangement part and the adjacent part are set so that the thickness dimension after folding before compression is substantially uniform along the front-rear direction. The folding storage body of the head protection airbag characterized by this.   The thickness adjusting means reduces the usage amount of the airbag fabric disposed at the site where the tension belt is disposed from the usage amount of the airbag fabric disposed at the adjacent site, The folding storage body of the head protection airbag according to claim 1, wherein the folding storage body is configured to be adjusted.   The thickness adjusting means adjusts the fineness of the airbag base fabric disposed in the tension belt by reducing the fineness of the airbag base fabric disposed in the adjacent portion. The folding storage body of the head protection airbag according to claim 1, wherein the folding storage body is configured.   From the coating amount applied to the airbag base fabric disposed in the adjacent portion by the thickness adjusting means, the coating amount applied to the airbag base fabric disposed in the portion where the tension belt is disposed. The foldable storage body for a head protection airbag according to claim 1, wherein the foldable storage body is configured to be reduced and adjusted.

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