JP2017043301A - Curtain airbag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a curtain airbag for simplifying sewing a tie panel and a curtain airbag body.SOLUTION: A curtain airbag 1 includes a curtain airbag body 2, and a tie panel 3 connected to the upper part and lower part of the curtain airbag body 2 by upper connection means 60 and lower connection means 70. A length from the upper connection means 60 to the lower connection means 70 of the tie panel 3 is smaller than a length from the upper connection means 60 to the lower connection means 70 of the curtain airbag body 2. The upper connection means 60 has a first linear sewing part 61 extending in a vehicle longitudinal direction and positioned above, and a second linear sewing part 62 positioned below. A front end part 61a of the first linear sewing part 61 is positioned on a vehicle front side from a front end part 62a of the second linear sewing part 62, and a rear end part 61b is positioned on a vehicle rear side from a rear end part 62b.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a curtain airbag (curtain-like airbag) that deploys downward along a side surface in a vehicle compartment.

  In an automobile equipped with a curtain airbag device, when the automobile receives a side collision or rolls over, the curtain airbag moves downward along the side surface of the vehicle compartment (for example, a door or a pillar). Expands.

  Patent Document 1 includes a curtain airbag body that is inflated by gas from an inflator, and a tie panel (combined panel) that is disposed on the opposite side of the interior of the curtain airbag body in the vehicle longitudinal direction. A curtain airbag is described. The upper side and the lower side of the tie panel are stitched to the upper and lower parts of the curtain airbag body, respectively.

  The length from the upper stitching portion to the lower stitching of the tie panel is shorter than the length from the upper stitching portion to the lower stitching portion of the curtain airbag body. Therefore, when the curtain airbag body is inflated, as shown in Patent Document 1 (particularly, paragraph 0033 and FIG. 7 (c)), the curtain airbag body is <shaped (arrow-shaped) or L-shaped when viewed from the side. Thus, a triangular prism-shaped space that is triangular when viewed from the front or rear is formed between the curtain airbag body and the tie panel.

  When an occupant is received by the curtain airbag body in the event of a vehicle emergency, in addition to the gas in the curtain airbag body flowing out, the curtain airbag body is deformed to reduce this triangular prism-shaped space, The energy applied to the passenger is absorbed.

  In such a curtain airbag, since the tie panel is coupled to the airbag body by a plurality of circular sewing lines, it takes time to sew the tie panel and the airbag body.

Japanese Patent No. 4797579

  The present invention has been made in view of the above-described conventional situation, and an object thereof is to provide a curtain airbag in which stitching between a tie panel and a curtain airbag body is simplified.

  A curtain airbag according to the present invention is a curtain airbag that is deployed downward along a side surface in a vehicle compartment, the curtain airbag body that is inflated by gas from an inflator, and the vehicle airbag longitudinal direction of the curtain airbag body. A tie panel that is disposed on the side of the interior of the curtain air bag in the middle of the curtain airbag, and is connected to the upper and lower portions of the curtain airbag body by upper connecting means and lower connecting means, respectively, In the curtain airbag, the length from the upper connecting means to the lower connecting means is smaller than the length from the upper connecting means to the lower connecting means of the curtain airbag body. There are at least two linear stitching portions extending, and the at least two linear stitching portions are located on the upper side. A first linear stitching portion and a second linear stitching portion located on the lower side, and the front end portion of the first linear stitching portion is a vehicle than the front end portion of the second linear stitching portion. It is located on the front side, and the rear end portion of the first linear stitching portion is at least one located on the vehicle rear side with respect to the rear end portion of the second linear stitching portion. It is characterized by satisfying one.

  The tie panel has a rectangular shape, a front end portion of the first linear stitching portion and a front end portion of the second linear stitching portion are located on a diagonal line of the rectangle, and the first linear stitching portion You may make it satisfy | fill at least any one of the rear-end part of a part and the rear-end part of the said 2nd linear stitching | suture part located on the diagonal of this rectangle.

  Alternatively, the front end portion of the first linear stitching portion and the front end portion of the second linear stitching portion are positioned on a straight line having an inclination of about 45 ° with respect to the vehicle longitudinal direction, and the first The rear end portion of the one-line stitching portion and the rear end portion of the second linear stitching portion satisfy at least one of being located on a straight line having an inclination of about −45 ° with respect to the vehicle longitudinal direction. You may do it.

  The front end portion of the first linear stitching portion may be located on the vehicle rear side with respect to the front side of the tie panel, and the rear end portion may be located on the vehicle front side with respect to the rear side of the tie panel.

  Return stitching processing for folding back to the center side of the linear stitching portion at least one of the front end portion and the rear end portion of the first linear stitching portion and the front end portion and the rear end portion of the second linear stitching portion. May be given.

  The lower connecting means has at least two linear stitching portions extending in the vehicle front-rear direction, and the at least two linear stitching portions are located at a lower side, a third linear stitching portion, and an upper side. And a front end portion of the third linear stitching portion is located on the vehicle front side with respect to a front end portion of the fourth linear stitching portion; and The rear end portion of the three-line stitching portion may satisfy at least one of the positions located on the vehicle rear side with respect to the rear end portion of the fourth linear stitching portion.

  The tie panel has a rectangular shape, a front end portion of the third linear stitching portion and a front end portion of the fourth linear stitching portion are positioned on a diagonal line of the rectangle, and the third linear stitching portion You may make it satisfy | fill at least any one of the rear-end part of a part and the rear-end part of the said 4th linear stitching | suture part located on the diagonal of this rectangle.

  Alternatively, the front end portion of the third linear stitching portion and the front end portion of the fourth linear stitching portion are positioned on a straight line having an inclination of about −45 ° with respect to the vehicle longitudinal direction, and The rear end portion of the third linear stitching portion and the rear end portion of the fourth linear stitching portion satisfy at least one of being located on a straight line having an inclination of about 45 ° with respect to the vehicle longitudinal direction. You may do it. In the present invention, about 45 ° represents 40 ° to 50 °, and about −45 ° represents −40 ° to −50 °.

  The front end portion of the third linear stitching portion may be located on the vehicle rear side with respect to the front side of the tie panel, and the rear end portion may be located on the vehicle front side with respect to the rear side of the tie panel.

  Return stitching processing for folding back to the center side of the linear stitching portion in at least one of the front end portion and the rear end portion of the third linear stitching portion and the front end portion and the rear end portion of the fourth linear stitching portion May be given.

  In the present invention, the upper connecting means for connecting the tie panel to the upper portion of the curtain airbag main body has at least two linear stitching portions extending in the vehicle front-rear direction, and the two linear stitching portions are positioned on the upper side. A first linear stitching portion and a second linear stitching portion located below, and the front end portion of the first linear stitching portion is on the vehicle front side with respect to the front end portion of the second linear stitching portion. And that the rear end portion of the first linear stitching portion is located on the vehicle rear side of the rear end portion of the second linear stitching portion. ing. Since the tie panel and the curtain airbag body are joined by the linear stitching portion, stitching can be simplified. Further, when the curtain airbag body is inflated and the tie panel is pulled in the vertical direction, the force applied to the end of the upper connecting means is distributed to the end regions of the first linear stitching portion and the second linear stitching portion. Therefore, the strength of the stitched portion is improved, and the occurrence of sewing thread breakage or the like can be prevented without adding a reinforcing cloth.

It is a front view from the room interior side of the curtain airbag which concerns on embodiment. It is a front view from the room inner side of a curtain airbag main body and a tie panel. FIG. 3 is a cross-sectional view taken along the line III-III in FIG. 1 in a state where the curtain airbag is inflated. It is a figure which shows the connection means which connects a tie panel to a curtain airbag main body. It is a figure which shows the arrangement | positioning place of the linear stitching | suture part which concerns on embodiment. (A) is a figure which shows the tie panel of the state which the curtain airbag inflated, (b) is a figure which shows the load concerning a stitching | suture part. It is a figure explaining dispersion | distribution of the load concerning a sewing part when a curtain airbag expand | swells. It is a figure which shows the connection means which concerns on another embodiment. It is a figure which shows the connection means which concerns on another embodiment. It is a figure which shows the connection means which concerns on another embodiment. It is a figure which shows the arrangement | positioning location of the linear stitching | suture part which concerns on another embodiment. It is a figure which shows the connection means which concerns on another embodiment. It is a figure which shows the connection means which concerns on another embodiment.

  Hereinafter, with reference to FIGS. 1-7, the curtain airbag 1 which concerns on embodiment of this invention is demonstrated. In the following description, the front-rear direction and the vertical direction correspond to the vehicle front-rear direction and the vehicle vertical direction when the curtain airbag 1 is installed in the vehicle, respectively. The right side in FIG. 1 is the front side of the vehicle, and the left side is the rear side of the vehicle. 1 and 2, the curtain airbag or the curtain airbag body is flat and unfolded.

  The curtain airbag 1 includes a curtain airbag body 2, a tie panel 3 provided on the opposite side of the curtain airbag body 2, and a duct panel 4 (FIG. 2) disposed in the curtain airbag body 2. Have. The duct panel 4 is for diverting the gas from the inflator inserted into the inflator insertion portion 7 forward and backward.

  In this embodiment, the curtain airbag main body 2 includes an indoor side panel 5 and a non-interior side panel 6 that are superposed (FIG. 3), and these panels 5 and 6 are connected to each other by linear connecting portions 30 to 40 and an annular connection. The inflator insertion part 7, the expansion chambers 8-17, and the gas passage parts 20-22 are formed between both panels 5 and 6 by couple | bonding by the parts 41-48.

  Each of the linear coupling portions 30 to 40 and each of the annular coupling portions 41 to 48 couples the panels 5 and 6 in an airtight manner, and the panels 5 and 6 even if the internal pressure of the curtain airbag body 2 rises to the design upper limit pressure. It is formed by a strong coupling means (for example, stitching with a high-strength sewing thread, bonding with an adhesive with high adhesive strength, or welding) so that they do not separate from each other. When the panels 5 and 6 are stitched, the sealing adhesive (sealant) may be applied to the planned stitching portion of the panel and then stitched, or may be sewn without applying the sealing adhesive. A part of the linear coupling portion (for example, the linear coupling portions 32 to 35) may be formed by interweaving the panels 5 and 6.

  The linear coupling portion 30 is a peripheral coupling portion that extends so as to substantially circulate the curtain airbag body 2. The linear coupling portion 30 is cut off in the middle of the upper edge of the curtain airbag main body 2 in the front-rear direction, whereby the inflator insertion portion 7 is formed.

  As shown in FIGS. 1 and 3 to 5, the upper side portion of the tie panel 3 is stitched to the panels 5 and 6 by the upper connecting means 60 along the upper side portion of the curtain airbag body 2. The lower side portion of the tie panel 3 is stitched to the panels 5 and 6 by lower connecting means 70 along the lower side portion of the curtain airbag body 2. The tie panel 3 may be provided with a plurality of air passage openings 3a (FIG. 2). The tie panel 3 is disposed in the vicinity of the inflator insertion portion 7 and on the vehicle front side of the inflator insertion portion 7.

  As shown in FIG. 2, the curtain airbag main body 2 has an extending portion 2 a that extends downward below the region where the tie panel 3 is disposed. By providing this extending portion 2a, the curtain airbag body 2 has a length in the vertical direction in the tie panel arrangement portion that is larger than the length in the vertical direction in the front and back regions thereof. The extended portion 2a is folded upward and away from the interior of the room, and is sewn to the lower side of the tie panel 3 by the lower connecting means 70.

  The length from the upper connecting means 60 to the lower connecting means 70 in a state where the tile panel 3 is flattened is longer than the length from the upper connecting means 60 to the lower connecting means 70 of the curtain airbag body 2 before the tile panel 3 is attached. Is also small

  In the front portion of the curtain airbag body 2, the upper side linear coupling portion 30 extends in a V shape, and a linear coupling portion 31 extends downward from the lower end portion of the V shape to form an annular coupling portion. 41. A circular patch cloth 29 is disposed at a portion where the annular coupling portion 41 is provided, and the panels 5 and 6 and the patch cloth 29 are stitched together by the annular coupling portion 41. Similarly, each of the annular coupling portions 42 to 48 described later is provided with a patch cloth.

  An expansion chamber 13 is formed between the annular coupling portion 41 and the linear coupling portion 30 on the front side. A gas passage portion 20 is formed between the annular coupling portion 41 and the lower linear coupling portion 30. Two annular coupling portions 42 and 43 are arranged behind the linear coupling portion 31 and slightly ahead of the tie panel 3. The annular coupling part 42 is located above the annular coupling part 43. The annular coupling portion 43 is located at substantially the same height as the lower side of the tie panel 3.

  Three annular coupling portions 44, 45, 46 are arranged slightly behind the tie panel 3. The uppermost annular coupling portion 44 is located below the inflator insertion portion 7. The lowest annular coupling portion 46 is located in the vicinity of the rear portion of the lower side of the tie panel 3. The annular coupling part 45 is located near the middle of the annular coupling parts 44 and 46. A linear coupling portion 36 is provided between the annular coupling portions 44 and 45. A gas passage 21 is provided between the annular coupling portions 45 and 46.

  Linear coupling portions 32 and 33 extend in a straight line between the annular coupling portions 42 and 46, and linear coupling portions 34 and 35 extend in a straight line between the annular coupling portions 43 and 44.

  The linear coupling portions 32 and 33 and the linear coupling portions 34 and 35 intersect at an intersection M. This intersection M is located slightly below the center point of the tie panel 3 (the center point in the vertical and horizontal directions). In this embodiment, it is preferable that the intersection point M is located near the middle of the tie panel 3 in the front-rear direction and is located 0 to 250 mm, particularly 0 to 150 mm above the lower side of the tie panel 3.

  The linear coupling portions 32 to 35 intersect in an X shape at the intersection M, the linear coupling portion 32 extends forward and upward from the intersection M, and the linear coupling portion 33 extends rearward and downward from the intersection M. The linear coupling portion 34 extends forward and downward from the intersection point M, and the linear coupling portion 35 extends rearward and upward from the intersection point M. The intersection M is located on the side of the front seat of the automobile.

  In the curtain airbag main body 2, the region sandwiched between the linear coupling portions 32, 35 is the expansion chamber 8, and the region sandwiched between the linear coupling portions 32, 34 is the expansion chamber 9. The region sandwiched between the portions 34 and 33 is the expansion chamber 10, and the region sandwiched between the linear coupling portions 33 and 35 is the expansion chamber 11.

  When the curtain airbag body 2 is not inflated, the horizontal distance from the intersection M to the linear coupling portion 31 is preferably about 150 to 450 mm, particularly about 180 to 380 mm. The annular coupling portion 45 is preferably located behind the intersection point M, and the distance from the intersection point M to the annular coupling portion 45 is preferably about 150 to 450 mm, particularly about 180 to 380 mm.

  The annular coupling portion 44 is located above and slightly behind the annular coupling portion 45. For this reason, the linear coupling portion 36 extends obliquely so as to be higher toward the rear. A linear coupling portion 37 is provided behind the linear coupling portion 36 so as to be substantially parallel to the linear coupling portion 36. The lower end of the linear coupling portion 37 is connected to the linear coupling portion 30 on the lower side of the curtain airbag body 2. The upper end of the linear coupling portion 37 is connected to the front end of the substantially horizontal linear coupling portion 38. The linear coupling portion 38 extends rearward substantially in parallel with the linear coupling portion 30 on the upper side of the curtain airbag body 2.

  The rear end of the linear coupling portion 38 is connected to a linear coupling portion 39 that extends obliquely so as to be lower in the rearward direction. The lower end of the linear coupling portion 39 is connected to the annular coupling portion 47. A gas passage portion 22 is formed between the annular coupling portion 47 and the linear coupling portion 30 on the lower side of the curtain airbag body 2.

  An expansion chamber 12 is formed between the linear coupling portion 37 and the linear coupling portion 36. The expansion chamber 14 is formed between the linear coupling portion 38 and the upper linear coupling portion 30. An expansion chamber 15 is formed between the linear coupling portion 39 and the linear coupling portion 30 on the rear side.

  An annular coupling portion 48 is provided below the middle portion of the linear coupling portion 38 in the front-rear direction. A linear coupling portion 40 extends between the annular coupling portion 48 and the lower side linear coupling portion 30. The linear coupling portion 40 extends substantially obliquely so as to be higher on the rear side. An expansion chamber 16 is formed between the linear coupling portion 40 and the linear coupling portion 39. An expansion chamber 17 is formed between the linear coupling portion 40 and the linear coupling portions 37 and 38.

  From the front side and the rear side of the curtain airbag main body 2, tethers 51 and 52 for connecting the curtain airbag main body 2 to the A pillar and the C pillar of the vehicle body are extended. Further, a plurality of attachment pieces 53 for connecting the curtain airbag body 2 to the roof side rail of the vehicle body are extended from the upper side of the curtain airbag body 2.

  An inflator (gas generator) is inserted into the inflator insertion port 7 of the curtain airbag 1, and a fastener such as a band is fastened to the outer periphery of the inflator insertion port 7, whereby the inflator is attached. This inflator is fixed to the roof side rail of the automobile.

  Although not shown in the drawings, the curtain airbag 1 has a roof side portion of an automobile in a state where the extension portion 2a of the curtain airbag main body 2 is folded back upward and then folded in the longitudinal direction as shown in FIG. It arrange | positions along (the boundary part of the ceiling surface and side surface in a vehicle interior). The tethers 51 and 52 are connected to an A pillar and a C pillar, and each mounting piece 53 is fixed to the roof side rail with a fixing tool such as a bolt or a rivet. The folded body of the curtain airbag 1 is covered with a roof garnish.

  As shown in FIG. 4, the tie panel 3 has a rectangular shape, and the upper connecting means 60 for sewing the upper side of the tie panel 3 to the panels 5 and 6 has two linear first linear shapes extending parallel to the vehicle longitudinal direction. It has a stitching portion 61 and a second linear stitching portion 62. Each stitching portion 61, 62 is formed by stitching with a sewing machine. The first linear stitching portion 61 is formed on the upper side, and the second linear stitching portion 62 is formed on the lower side. The distance between the first linear stitching portion 61 and the second linear stitching portion 62 is about 1 mm to 20 mm. It has become.

  The front end portion 61 a of the first linear stitching portion 61 is located on the vehicle front side with respect to the front end portion 62 a of the second linear stitching portion 62. The rear end portion 61 b of the first linear stitching portion 61 is located on the vehicle rear side with respect to the rear end portion 62 b of the second linear stitching portion 62. That is, the first linear stitching portion 61 is longer than the second linear stitching portion 62, the front end 61a is closer to the front side 3a of the tie panel 3 than the front end 62a, and the rear end 61b is the rear end. The position is closer to the rear side 3b of the tie panel 3 than 62b.

  The lower connecting means 70 for sewing the lower side portion of the tie panel 3 to the panels 5 and 6 includes two linear third linear stitching portions 71 and fourth linear stitching portions 72 extending in parallel with the vehicle longitudinal direction. . Each stitching portion 71, 72 is formed by stitching with a sewing machine. The third linear stitching portion 71 is formed on the lower side and the fourth linear stitching portion 72 is formed on the upper side. The distance between the third linear stitching portion 761 and the fourth linear stitching portion 72 is about 1 mm to 20 mm. ing.

  The front end portion 71 a of the third linear stitching portion 71 is located on the vehicle front side with respect to the front end portion 72 a of the fourth linear stitching portion 72. The rear end portion 71 b of the third linear stitching portion 71 is located on the vehicle rear side with respect to the rear end portion 72 b of the fourth linear stitching portion 72. That is, the third linear stitching portion 71 is longer than the fourth linear stitching portion 72, the front end 71a is closer to the front side 3a of the tie panel 3 than the front end 72a, and the rear end 71b is the rear end. It is located closer to the rear side 3b of the tie panel 3 than 72b.

  The first linear stitching portion 61 and the third linear stitching portion 71 have the same length, and the second linear stitching portion 62 and the fourth linear stitching portion 72 have the same length. Yes. The front end 61a and the front end 71a are located on the vehicle rear side of the front side 3a of the tie panel 3, and the distance d1 from the front end 61a to the front side 3a and the distance d2 from the front end 71a to the front side 3a are It is about 3 mm to 20 mm.

  The rear end portion 61b and the rear end portion 71b are located on the vehicle front side with respect to the rear side 3b of the tie panel 3, and the distance d3 from the rear end portion 61b to the rear side 3b and from the rear end portion 71b to the rear side 3b. The interval d4 is about 3 mm to 20 mm.

  The front end portion 61a of the first linear stitching portion 61 is preferably located on the vehicle front side by about 1 mm to 24 mm from the front end portion 62a of the second linear stitching portion 62. Similarly, it is preferable that the rear end portion 61 b of the first linear stitching portion 61 is located on the vehicle rear side by about 1 mm to 24 mm from the rear end portion 62 b of the second linear stitching portion 62. The front end portion 71 a of the third linear stitching portion 71 is preferably located on the vehicle front side by about 1 mm to 24 mm from the front end portion 72 a of the fourth linear stitching portion 72. The rear end portion 71 b of the third linear stitching portion 71 is preferably located on the vehicle rear side by about 1 mm to 24 mm from the rear end portion 72 b of the fourth linear stitching portion 72.

  In particular, in the present embodiment, as shown in FIG. 5, the front end portion 61 a of the first linear stitching portion 61 and the front end portion 62 a of the second linear stitching portion 62 are connected to the front upper corner portion of the tie panel 3. It is located on a diagonal line L1 that connects the rear lower corner. In addition, the rear end portion 71b of the third linear stitching portion 71 and the rear end portion 72b of the fourth linear stitching portion 72 are also located on the diagonal line L1.

  The rear end portion 61b of the first linear stitching portion 61 and the rear end portion 62b of the second linear stitching portion 62 are on a diagonal line L2 connecting the rear upper corner portion and the lower front corner portion of the tie panel 3. To position. The front end portion 71a of the third linear stitching portion 71 and the front end portion 72a of the fourth linear stitching portion 72 are also located on the diagonal line L2.

  When an automobile equipped with the curtain airbag device configured as described above collides or rolls over, the inflator is activated, and gas is supplied from the inflator into the curtain airbag body 2 so that the curtain airbag body 2 starts to expand. To do. This curtain airbag 1 pushes open a roof garnish and expand | deploys below along the side surface of a vehicle interior.

  At this time, the gas supplied from the inflator into the curtain airbag body 2 is diverted forward and backward by the duct panel 4 (FIG. 2). The gas diverted forward expands the expansion chambers 8, 9, 10, 12, and 11 sequentially. Part of the gas that goes from the expansion chamber 9 to the expansion chamber 10 flows into the expansion chamber 13 from the gas passage portion 20 and expands the expansion chamber 13.

  Since the vertical length of the tie panel 3 is smaller than the length of the tie panel placement portion of the curtain airbag body 2 (the length before the tie panel 3 is connected as shown in FIG. 2), each of the expansion chambers 8 to 11 As shown in FIG. 3, the curtain airbag body 2 is inflated so that the vicinity of the intersection M protrudes from the tie panel 3 toward the indoor side as shown in FIG.

  The gas shunted rearward by the duct panel 4 flows along the upper side in the curtain airbag main body 2, first inflates the expansion chamber 14, expands the last expansion chamber 15, and then expands the gas passage portion 22. As described above, the expansion chambers 16 and 17 are sequentially expanded.

  In the state in which the curtain airbag main body 2 is inflated, in the tie panel disposition portion, the four expansion chambers 8 to 11 extend upward, forward, downward, and rearward from the intersection M, and the intersection M and the tie panel 3 A space P having a substantially pyramid shape is formed between the two. When the vicinity of the intersection M receives an occupant, the expansion chambers 8 to 11 are reduced in volume, and the curtain airbag body 2 is deformed so that the thickness of the space S (distance from the intersection M to the tie panel 3) is reduced. The kinetic energy of the passenger is absorbed.

  When the curtain airbag body 2 is inflated and a space S is formed between the intersection M and the tie panel 3, the tie panel 3 is pulled up and down as shown in FIG. Therefore, a force toward the center side of the tie panel 3 is applied to both ends of the upper connecting means 60 and the lower connecting means 70. Therefore, for example, as shown in FIG. 6B, when the upper connecting means 60 is composed of one linear stitching portion 80, the force in the direction of the arrow in the figure is concentrated on the end point of the linear stitching portion 80, and sewing is performed. Thread breakage may occur.

  In the present embodiment, the upper connecting means 60 has two linear stitching portions (the first linear stitching portion 61 and the second linear stitching portion 62), and the front end portion 61 a of the first linear stitching portion 61. However, the front end 62a of the second linear stitching portion 62 is positioned on the vehicle front side, and the rear end 61b is positioned on the vehicle rear side of the rear end 62b. Therefore, as shown in FIG. 7, the force applied to the rear end portion of the upper connecting means 60 as the tie panel 3 is pulled in the vertical direction causes the end of the first linear stitching portion 61 and the second linear stitching portion 62. As a result, the strength of the stitched portion is improved and the occurrence of sewing thread breakage or the like can be prevented.

  FIG. 7 shows an example of force distribution on the upper rear side of the tie panel 3, but the same effect can be obtained on the upper front side, the lower front side, and the lower rear side of the tie panel 3. In this embodiment, the force applied to the end portions of the upper connecting means 60 and the lower connecting means 70 as the tie panel 3 is pulled in the vertical direction is distributed to the end regions of the two linear stitching portions. As shown in FIG. 6 (b), the strength of the stitched portion between the tie panel 3 and the curtain airbag body 2 can be increased and strengthened as compared with the case where the force is concentrated on the end point of one linear coupling portion. The addition of a cloth etc. can be made unnecessary.

  When the end portions of the first linear stitching portion 61 and the third linear stitching portion 71 reach the front side 3a and the rear side 3b of the tie panel 3, when the curtain airbag body 2 is inflated, the first linear shape There is a possibility that the base cloth of the tie panel 3 is cut off from the end of the stitched portion 61 or the third linear stitched portion 71 as a base point. However, in the present embodiment, the front end 61a and the front end 71a are located on the vehicle rear side of the front side 3a of the tie panel 3, and the rear end 61b and the rear end 71b are the rear side of the tie panel 3. It is located on the vehicle front side from 3b. Therefore, when the curtain airbag main body 2 is inflated, the tie panel 3 can be prevented from being cut.

  In the present embodiment, the tie panel 3 is curtained with straight stitching portions (first linear stitching portion 61, second linear stitching portion 62, third linear stitching portion 71, and fourth linear stitching portion 72). Since it couple | bonds with the airbag main body 2, the tie panel 3 and the curtain airbag main body 2 are easy to sew, and a labor can be reduced.

  When the curtain airbag body 2 is inflated and the tie panel 3 is pulled up and down, a particularly large force is applied to the end of the upper connecting means 60 in the vicinity of the inflator insertion portion 7, that is, in the upper rear portion of the tie panel 3. Therefore, as shown in FIG. 8, only the upper connecting means 60 is provided with two linear stitching portions (the first linear stitching portion 61 and the second linear stitching portion 62). It is good also as a structure which abbreviate | omitted the stitching | suture part 71. FIG.

  As shown in FIG. 9, the first linear stitching portion 61 </ b> A having a short length may be provided only at the upper rear portion of the tie panel 3 to distribute the force. Furthermore, as shown in FIG. 10, when viewed from the first linear stitching portion 61 </ b> A, a length corresponding to the diagonal of the tie panel 3 is applied to a position where a relatively large force is applied, that is, a front lower portion of the tie panel 3. A short third linear stitching portion 71A may be provided.

  In the above embodiment, the rear end portion 61b of the first linear stitching portion 61 and the rear end portion 62b of the second linear stitching portion 62 are located on the diagonal line L2 of the tie panel 3, but the tie panel 3 In many cases, is a vertically long rectangle that is relatively close to a square. Actually, as shown in FIG. 11, on the straight line forming about −45 ° with respect to the first linear stitching portion 61, that is, in the vehicle longitudinal direction. On the other hand, the rear end portions 61b and 62b may be positioned on a straight line forming about −45 °.

  Similarly, the front end portion 61a of the first linear stitching portion 61 and the front end portion 62a of the second linear stitching portion 62 may be positioned on a straight line that forms about 45 ° with respect to the vehicle longitudinal direction. The front end portion 71a of the third linear stitching portion 71 and the front end portion 72a of the fourth linear stitching portion 72 may be positioned on a straight line that forms −about 45 ° with respect to the vehicle longitudinal direction. The rear end portion 71b of the third linear stitching portion 71 and the rear end portion 72b of the fourth linear stitching portion 72 may be positioned on a straight line that forms about 45 ° with respect to the vehicle longitudinal direction. In FIG. 11, the clockwise rotation angle is a negative angle, and the counterclockwise rotation angle is a positive angle.

  In the above embodiment, at both ends of the first linear stitching portion 61, the second linear stitching portion 62, the third linear stitching portion 71, and the fourth linear stitching portion 72, on the center side of the linear stitching portion. You may give the reverse stitching process turned back. Unraveling can be prevented by applying this reverse stitching process.

  As shown in FIG. 12, the rear end portion 61 b of the first linear stitching portion 61 and the rear end portion 62 b of the second linear stitching portion 62 may be connected by a linear stitching portion 64. As a result, the first linear stitching portion 61, the linear stitching portion 64, and the second linear stitching portion 62 can be formed in succession, so the first linear stitching portion 61 and the second linear stitching portion 62 are formed. Compared to the case of forming them separately, the labor of the suturing operation can be reduced. Further, the strength of the stitched portion is improved, and the occurrence of sewing thread breakage or the like can be prevented.

  Similarly, the front end portion 61a of the first linear stitching portion 61 and the front end portion 62a of the second linear stitching portion 62 may be coupled. Further, the front end portion 71a of the third linear suture portion 71 and the front end portion 72a of the fourth linear suture portion 72 may be connected, the rear end portion 71b of the third linear suture portion 71, and the first The rear end portion 72b of the four-wire stitching portion 72 may be connected.

  In the above embodiment, the upper connecting means 60 has two linear stitching portions (the first linear stitching portion 61 and the second linear stitching portion 62), but there are three or more linear stitching portions. But you can. Similarly, the lower connecting means 70 may have three or more linear stitching portions. FIG. 13 shows a configuration in which the upper connecting means 60 and the lower connecting means 70 each have three linear stitching portions.

  For example, a fifth linear stitching portion 63 is formed below the second linear stitching portion 62, and a sixth linear stitching portion 73 is formed above the fourth linear stitching portion 72. The fifth linear stitching portion 63 is shorter than the second linear stitching portion 62, and the sixth linear stitching portion 73 is shorter than the fourth linear stitching portion 72.

  The front end portion 63a of the fifth linear stitching portion 63 and the rear end portion 73b of the sixth linear stitching portion 73 are positioned on a diagonal line L1 connecting the front upper corner portion and the rear lower corner portion of the tie panel 3. To do. The rear end portion 63b of the fifth linear stitching portion 63 and the front end portion 73a of the sixth linear stitching portion 73 are located on a diagonal line L2 connecting the upper rear corner and the lower front corner of the tie panel 3. To do.

  The above embodiment shows an example of the present invention, and the present invention is not limited to the above embodiment.

DESCRIPTION OF SYMBOLS 1 Curtain airbag 2 Curtain airbag main body 3 Tie panel 4 Duct panel 5 First panel 6 Second panel 7 Inflator insertion part 8-17 Expansion chamber 20-22 Gas passage part 30-40 Linear coupling part 41-48 Annular Connecting portion 60 Upper connecting means 61 First linear stitching portion 62 Second linear stitching portion 70 Lower connecting means 71 Third linear stitching portion 72 Fourth linear stitching portion

Claims (10)

A curtain airbag that deploys downward along the side of the vehicle compartment,
A curtain airbag body that is inflated by gas from the inflator;
A tie panel that is disposed on the side of the interior of the curtain airbag main body in the longitudinal direction of the vehicle and connected to the upper and lower portions of the curtain airbag main body by an upper connecting means and a lower connecting means, respectively. ,
With
In the curtain airbag, the length from the upper connecting means to the lower connecting means of the tie panel is smaller than the length from the upper connecting means to the lower connecting means of the curtain airbag body,
The upper connecting means has at least two linear stitching portions extending in the vehicle front-rear direction,
The at least two linear stitching portions have a first linear stitching portion located on the upper side and a second linear stitching portion located on the lower side,
The front end portion of the first linear stitching portion is located on the vehicle front side of the front end portion of the second linear stitching portion, and the rear end portion of the first linear stitching portion is A curtain airbag characterized by satisfying at least one of being located on the vehicle rear side of the rear end portion of the second linear stitching portion. The tie panel according to claim 1, wherein the tie panel is rectangular.
A front end portion of the first linear stitching portion and a front end portion of the second linear stitching portion are located on a diagonal line of the rectangle; and a rear end portion of the first linear stitching portion and the second end portion The curtain airbag characterized by satisfy | filling at least any one of the rear-end part of a linear stitching | suture part being located on the diagonal of this rectangle.   The front end portion of the first linear stitching portion and the front end portion of the second linear stitching portion are located on a straight line having a 45 ° inclination with respect to the vehicle longitudinal direction, and The rear end portion of the first linear stitching portion and the rear end portion of the second linear stitching portion satisfy at least one of being located on a straight line having an inclination of −45 ° with respect to the vehicle longitudinal direction. Curtain airbag characterized by that.   4. The front end portion of the first linear stitching portion is located on the vehicle rear side with respect to the front side of the tie panel, and the rear end portion is positioned with respect to the rear side of the tie panel. A curtain airbag, which is located on the vehicle front side.   In any one of Claims 1 thru | or 4, In at least any one among the front-end part and rear-end part of a said 1st linear stitching | suture part, and the front-end part and rear-end part of a said 2nd linear stitching | suture part. A curtain airbag which is subjected to a reverse stitching process for folding back to the center side of the linear stitching portion. In any one of Claims 1 thru | or 5,
The lower connecting means has at least two linear stitching portions extending in the vehicle front-rear direction, and the at least two linear stitching portions are located at a lower side, a third linear stitching portion, and an upper side. A fourth linear stitching portion to
The front end portion of the third linear suture portion is located on the vehicle front side of the front end portion of the fourth linear suture portion, and the rear end portion of the third linear suture portion is The curtain airbag characterized by satisfy | filling at least any one of being located in the vehicle back side rather than the rear-end part of a 4th linear stitching | suture part. The tie panel according to claim 6, wherein the tie panel is rectangular.
The front end portion of the third linear stitching portion and the front end portion of the fourth linear stitching portion are located on the diagonal of the rectangle, and the rear end portion of the third linear stitching portion and the fourth The curtain airbag characterized by satisfy | filling at least any one of the rear-end part of a linear stitching | suture part being located on the diagonal of this rectangle.   The front end portion of the third linear stitching portion and the front end portion of the fourth linear stitching portion are located on a straight line having an inclination of -45 ° with respect to the vehicle longitudinal direction, and The rear end portion of the third linear stitching portion and the rear end portion of the fourth linear stitching portion satisfy at least one of being located on a straight line having an inclination of 45 ° with respect to the vehicle longitudinal direction. Curtain airbag characterized by that.   9. The front end portion of the third linear stitching portion is located on the vehicle rear side with respect to the front side of the tie panel, and the rear end portion is positioned with respect to the rear side of the tie panel. A curtain airbag, which is located on the vehicle front side.   In any 1 item | term of Claim 6 thru | or 9, In at least any one among the front-end part and rear-end part of the said 3rd linear stitching | suture part, and the front-end part and rear-end part of the said 4th linear stitching | suture part. A curtain airbag which is subjected to a reverse stitching process for folding back to the center side of the linear stitching portion.

Images