JP5574656B2 - Curtain airbag device - Google Patents

Description

  The present invention relates to a curtain airbag device that inflates and deploys along the side of a passenger compartment for the purpose of protecting passengers during a side collision or rollover (rollover) of a vehicle.

  Curtain airbags that can protect a passenger's head even when a vehicle transitions from a side collision to a rollover are mainly attached to a roof side rail or the like inside a roof head trim above the door. Usually, the curtain airbag is attached in a state of being folded into a roll or the like so as to be attached to a limited storage space.

  When high-pressure gas is supplied from the inflator in an emergency, the curtain airbag is inflated and deployed rapidly. As a result, the cushion portion may come into contact with an object around the roof side rail, such as a bracket of the assist grip, and may burst. Therefore, a curtain airbag having a means for covering the cushion portion, such as a protector for protecting the cushion portion, has been proposed (for example, Patent Document 1).

JP 2009-23439 A JP 2006-306121 A JP 2009-168398 A

  One of the prominent problems of the prior art is that when gas is supplied from an inflator in an emergency, the main duct above the cushion part first expands and deploys, and the cushion part tries to rotate due to the influence. It is. This unexpected rotation may cause the cushion portion to unfold in an unfavorable direction. For example, if the cushion portion rotates toward the inside of the vehicle, the cushion portion excessively expands inside the vehicle and exceeds the head of the occupant, and there is a possibility that protection of the occupant cannot be achieved. On the other hand, when the cushion portion rotates to the outside of the vehicle, it may be caught by the B pillar, and the deployment may end in failure.

  In view of such a problem, the present invention provides a curtain airbag device that prevents unexpected rotation of the cushion portion that occurs in the initial stage of inflation and deployment, and that allows the cushion portion to be appropriately deployed between the side surface of the passenger compartment and the occupant. It is an object.

  In order to solve the above-mentioned problems, a typical configuration of the present invention is a curtain airbag device housed in the upper side of a passenger compartment, extending in the vehicle front-rear direction and wound from the lower end toward the upper end. A cushion part that is stored and supplied with gas and expands and deploys downward; and a long protector that covers the cushion part. The protector interferes with a fixing member that is fixed to the vehicle body around the protector. It has the rotation prevention part integral with a protector which prevents rotation of a cushion part, It is characterized by the above-mentioned.

  According to said structure, the rotation prevention part of the protector which is going to rotate interferes with a fixing member, and the unexpected rotation of the cushion part which arises in the initial stage of expansion | deployment deployment is prevented. Accordingly, the deployment direction is stabilized, and the cushion portion is properly deployed between the passenger compartment side surface and the passenger.

  Said rotation prevention part may protrude from the protector. This is because when the rotation preventing portion is assembled at a position where it interferes with the fixing member if the cushion portion is to rotate, it is easier to install if the rotation preventing portion protrudes.

  The curtain airbag device may further include alignment means for aligning the wound cushion portion so that the protector covers the cushion portion at a predetermined position.

  According to the said structure, after a protector and a cushion part are aligned by predetermined | prescribed positional relationship, the rotation prevention part integral with a protector is assembled | attached to the position which interferes with a fixing member if a cushion part tries to rotate. Therefore, since the posture of the protector with respect to the vehicle body is constant and the posture of the cushion portion with respect to the vehicle body is also constant, the rotation of the cushion portion when the curtain airbag device is assembled is prevented.

  ADVANTAGE OF THE INVENTION According to this invention, the curtain airbag apparatus which prevents the unexpected rotation of the cushion part which arises at the initial stage of expansion | deployment deployment, and a cushion part expand | deploys appropriately between a vehicle compartment side surface and a passenger | crew can be provided.

It is a figure which illustrates 1st Embodiment of the curtain airbag apparatus by this invention. It is a figure which illustrates the expansion | deployment state of the curtain airbag apparatus of FIG. FIG. 2 is an exploded view of the curtain airbag device of FIG. It is a figure which illustrates the detail of the protector of Fig.3 (a). It is the elements on larger scale of the protector of FIG. It is a perspective view of the curtain airbag apparatus of FIG.4 (b). It is BB sectional drawing of Fig.4 (a). It is a figure which illustrates the shape of the 1st edge part near an inflator among the protectors of FIG. It is a figure explaining the effect of the chalk prevention shape of FIG. It is a figure which illustrates the shape of the 2nd edge part near B pillar among the protectors of FIG. It is a figure explaining the effect of the gas rectification | straightening shape of FIG. It is a perspective view which illustrates 2nd Embodiment of the curtain airbag apparatus by this invention. It is CC sectional drawing of the curtain airbag apparatus of FIG. It is a perspective view which illustrates 3rd Embodiment of the curtain airbag apparatus by this invention. It is DD sectional drawing of FIG. It is a perspective view which illustrates 4th Embodiment of the curtain airbag apparatus by this invention. It is a figure which illustrates 5th Embodiment of the curtain airbag apparatus by this invention. It is a figure which illustrates 6th Embodiment of the curtain airbag apparatus by this invention. It is a figure which illustrates 7th Embodiment of the curtain airbag apparatus by this invention. It is a figure which illustrates 8th Embodiment of the curtain airbag apparatus by this invention. It is a figure which illustrates 9th Embodiment of the curtain airbag apparatus by this invention.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in the embodiments are merely examples for facilitating understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are denoted by the same reference numerals, and redundant description is omitted, and elements not directly related to the present invention are not illustrated. To do.

(First embodiment)
FIG. 1 is a diagram illustrating a first embodiment of a curtain airbag device according to the present invention. FIG. 1A illustrates the curtain airbag device 100 when not deployed, and FIG. 1B illustrates the curtain airbag device 100 when deployed. Hereinafter, all the embodiments will be described as a curtain airbag device for the right side surface of the vehicle 102 as shown in FIG. 1, but the curtain airbag device for the left side surface has a similar symmetrical structure.

  As shown in FIG. 1A, the curtain airbag device 100 can be stored above the side of the vehicle compartment. The curtain airbag device 100 is attached to the roof side rail 110. Usually, a plurality of pillars exist on the side of the passenger compartment. These are called the front pillar (A pillar 104), the center pillar (B pillar 106), and the rear pillar (C pillar 108) from the front of the vehicle 102. The inner side of each pillar is covered with a pillar trim made of a cushion material or the like to improve the aesthetics of the interior of the vehicle.

  The curtain airbag device 100 includes a cushion portion 140, which is housed in a state of extending in the vehicle front-rear direction and wound from the lower end toward the upper end, as shown in FIG. The cushion part 140 is formed in a bag shape by, for example, sewing a base fabric constituting the surface thereof on the front and back sides or by using OPW (One-Piece Woven).

  The curtain airbag device 100 also includes a cylinder-type inflator 120 that supplies gas to the cushion portion 140 from a predetermined position at the upper end of the cushion portion 140. When a side collision or rollover (rollover) occurs in the vehicle 102, first, a sensor (not shown) provided in the vehicle 102 detects an impact and transmits an ignition signal to the inflator 120. Next, the explosive of the inflator 120 burns and the generated gas is supplied to the cushion part 140.

  When the gas is supplied from the inflator 120, the cushion part 140 is inflated and deployed downward along the side of the passenger compartment (the side window 112 and the like) as shown in FIG. According to the cushion part 140, the passengers in the front seat and the rear seat can be protected.

  FIG. 2 is a diagram illustrating the deployed state of the curtain airbag device of FIG. FIG. 2 is a view of the curtain airbag device 100 on the right side as viewed from the vehicle inner side in the traveling direction of the vehicle 102.

  The cushion part 140 has a main duct 142 and a plurality of chambers 146. The main duct 142 is disposed substantially horizontally above the cushion portion 140, and diverts the gas 148 flowing in the vehicle longitudinal direction from the inflator 120 to the plurality of chambers 146 provided in the vehicle longitudinal direction. The plurality of chambers 146 are portions that are in direct contact with the occupant during an emergency such as a collision. The plurality of chambers 146 protect the occupant from crashing into the side of the vehicle and jumping out of the vehicle.

  FIG. 3 is an exploded view of the curtain airbag device 100 of FIG. In FIG. 3A, the cushion part 140 is in a wound storage state. The cylinder type inflator 120 has a gas outlet 122 and is inserted into an inflator insertion portion 123 </ b> A of the gas guide 123. After the insertion, the inflator 120 is stored in a state of protruding to a predetermined position on the upper end of the cushion part 140 as illustrated in FIG. A gas 148 ejected from the gas ejection port 122 is distributed and supplied in the vehicle front-rear direction by the gas guide 123.

  FIG. 3B is a partially enlarged view of FIG. A plurality of tabs (cushion tabs 170) are attached to the upper end of the cushion part 140 in the vehicle front-rear direction. The cushion tab 170 is a band-shaped member attached to the upper end of the cushion portion 140 and is provided with a bolt hole 172. A fixing bracket 174 is attached to each cushion tab 170, and a square bolt hole 176 of the fixing bracket 174 overlaps with a bolt hole 172 of the cushion tab 170. FIG. 3B illustrates this state. The curtain airbag device 100 is fixed to the roof side rail 110 so that the swing as shown by the arrow 178 does not occur by inserting and fixing a prismatic bolt into the square bolt hole 176.

  The curtain airbag device 100 is characterized in that it includes a long protector 180 that covers the cushion portion 140. The protector 180 will be described below.

(Protector)
FIG. 4 is a diagram illustrating details of the protector of FIG. FIGS. 4A and 4B are views of the protector 180 viewed from the inside and the outside of the vehicle, respectively.

  FIG. 5 is a partially enlarged view of the protector 180 of FIG. FIG. 5A is a partially enlarged view of the first end portion 180A of the protector 180 close to the inflator 120 as viewed from the vehicle interior side. FIG. 5B is a perspective view of the first end portion 180A as viewed from the outside of the vehicle. 5C is a cross-sectional view taken along line AA in FIG. 5A, and FIG. 5D is an enlarged view of a region 191 in FIG. 5C. In FIG. 5, the cushion portion 140 is not shown except for FIG.

  As illustrated in FIG. 5, an assist grip bracket 192 is provided on the vehicle body. The assist grip bracket 192 is a bracket for fixing to the vehicle body an assist grip (not shown) that is held by the occupant, that is, a handle that is held when getting on and off the vehicle 102 or when the vehicle body is shaken. The assist grip bracket 192 is not fixed to the protector 180, but can be said to be a fixing member fixed to the vehicle body around the protector 180. 2 to 4, the assist grip bracket 192 is not shown.

  The protector 180 may be attached to any position of the cushion part 140. However, the protector 180 is originally attached in order to prevent the cushion portion 140 from coming into contact with a surrounding object at the time of inflating and deploying to generate a burst or the like. Therefore, it is particularly preferable to attach to the periphery of an object where the cushion portion 140 is likely to burst when it collides with the cushion portion 140, such as the assist grip bracket 192.

  As illustrated in FIG. 5C and the like, the protector 180 has an arcuate open cross section that opens downward, and covers the cushion portion 140 by contacting the cushion portion 140 on its inner surface.

  As illustrated in FIGS. 5B to 5D, the protector 180 includes an anti-rotation portion 194 that is integral with the protector 180. The rotation preventing portion 194 is a member that interferes with the assist grip bracket 192 and prevents the rotation 193 of the cushion portion 140 (illustrated by an arrow in FIG. 5C).

  When gas is supplied from the inflator 120 in an emergency, the main duct 142 at the upper end of the cushion part 140 is first inflated and deployed, and the cushion part 140 may cause rotation 193 due to the influence. This unexpected rotation 193 causes the cushion portion 140 to unfold in an unfavorable direction. For example, when the rotation 193 occurs, as shown in FIG. 5C, the cushion part 140 is excessively expanded to the vehicle outer side 195 and is caught by the B pillar 106, and the expansion may end in failure.

  Depending on the method of winding the cushion part 140, the cushion part 140 may rotate in the direction opposite to the rotation 193 in the initial stage of expansion and deployment. In that case, as shown in FIG. 5 (c), the cushion portion 140 is excessively expanded to the vehicle interior side 197 and exceeds the head of the occupant, and there is a possibility that protection of the occupant cannot be achieved.

  Therefore, in the present embodiment, the protector 180 for protecting the cushion part 140 is fixed to the cushion part 140 with the adhesive tape 152 (FIG. 4), and when the cushion part 140 tries to rotate, the protector 180 and the protector 180 rotate 193. I paid attention to the point. Since the rotation preventing portion 194 is provided on the protector 180 to be rotated, and the rotation preventing portion 194 interferes with the assist grip bracket 192, the unexpected rotation 193 of the cushion portion that occurs in the initial stage of inflation and deployment is prevented. Accordingly, the deployment direction is stabilized, and the cushion portion is appropriately deployed between the side surface of the passenger compartment and the occupant as illustrated by the arrow 199 in FIG.

  Thus, the present embodiment is that the protector 180 originally provided for preventing damage such as burst of the cushion part 140 is used, and the anti-rotation part 194 as described above is provided to help prevent the rotation. It is a feature of the form.

  In addition, what interferes with the rotation prevention part 194 is not limited to the assist grip bracket 192 as long as it is fixed to the periphery of the roof side rail 110 (fixing member).

  In the present embodiment, the rotation 193 in FIG. 5C is prevented. However, when the reverse rotation is to be prevented, the protector 180 is positioned at a position where it interferes with the assist grip bracket 192 when the reverse rotation occurs. What is necessary is just to provide a rotation prevention part. Also at this time, the rotation preventing portion may be integrated with the protector 180, and the interference with the rotation preventing portion may be caused by the fixing member described above.

  As illustrated in FIG. 5, the rotation prevention unit 194 protrudes from the protector 180. This is because when the cushion portion 140 is about to rotate, when the rotation prevention portion 194 is assembled at a position where the cushion portion 140 interferes with the assist grip bracket 192, it is easier to install if the rotation prevention portion 194 protrudes.

  However, although it cannot be denied that the installation work is complicated, a concave rotation prevention member (not shown) may be provided in the protector 180, and a fixing member such as the assist grip bracket 192 may be fitted into the concave portion.

  6 is a perspective view of the curtain airbag device 100 shown in FIG. 4B, and FIG. 7 is a cross-sectional view taken along the line BB of FIG. The curtain airbag device 100 further includes alignment means for aligning the wound cushion portion 140 so that the protector 180 covers the cushion portion 140 at a predetermined position. In this embodiment, the alignment means refers to the slit 196 provided in the protector 180 and the cushion tab 170 of the cushion part 140.

  As illustrated in FIGS. 6 and 7, when the cushion tab 170 is passed through the slit 196 of the protector 180, both the protector 180 and the cushion portion 140 are aligned and do not deviate from each other. The protector 180 is also fixed to the cushion part 140 with an adhesive tape 152 (not shown in FIG. 4 and FIG. 6 and FIG. 7), but the positioning is achieved very firmly as compared with such fixing means.

  According to the above configuration, after the positional relationship between the protector 180 and the cushion portion 140 is fixed as shown in FIG. 7, the curtain airbag device 100 is assembled to the roof side rail 110 as shown in FIG. . The assembly position at this time is a position where the rotation preventing portion 194 integrated with the protector 180 interferes with the assist grip bracket 192 when the cushion portion 140 tries to rotate in the initial stage of inflation and deployment. With this assembly, the posture of the protector 180 with respect to the vehicle body becomes constant. Since the positional relationship between the protector 180 and the cushion part 140 is already fixed, the posture of the cushion part 140 with respect to the vehicle body is also constant. In this way, the rotation of the cushion part 140 when the curtain airbag device 100 is assembled is also prevented.

(Shape at both ends of the protector)
FIG. 8 is a diagram illustrating the shape of the first end 180A close to the inflator 120 in the protector of FIG. 8A is a view of the first end portion 180A viewed from the inside of the vehicle, FIG. 8B is a perspective view of the first end portion 180A, and FIG. 8C is a cross section of the first end portion 180A. It is a figure which illustrates transition of a shape. As illustrated in FIG. 8C, in the cross section of the protector 180, the end point P on the vehicle inner side of the open curve that forms the cross section gently rises at the first end portion 180A close to the inflator 120. That is, as the first end portion 180A is approached, the shape of the open curve sequentially changes to a cross-section II, a cross-section II-II, and a cross-section III-III as illustrated in FIG. As a result, the front edge of the open curve is expanded from the distance D1 to the distance D2. Such a flare-shaped (trumpet-shaped) first end portion 180A is referred to as a “choke preventing shape”.

  In the present embodiment, the end point P on the inner side of the open curve rises to a height exceeding the upper end H at the center of the protector 180. On the other hand, the open curve maintains an arc shape or a substantially L shape.

  According to the above configuration, as illustrated in FIG. 5A or FIG. 8B, the front opening that can be seen only from below at the center of the protector 180 is visible from the vehicle inner side at the first end portion 180A. As described above, the protector 180 has a choke prevention shape in which the front end gently expands in a flare shape at the first end portion 180A close to the inflator 120.

  FIG. 9 is a diagram for explaining the effect of the choke prevention shape of FIG. A portion of the cushion portion 140 that is not covered with the protector 180 and is largely expanded freely by the gas becomes a choke (clogging) of the gas flow because the first end portion 180A becomes a bottleneck. However, as described above, the front end of the protector 180 that is close to the inflator 120 is gradually enlarged, so that the shape of the cushion portion 140 follows this as illustrated in FIG. 9A. It changes slowly and is less likely to cause bursts.

  At the first end, the frontage extends to the inside of the vehicle. This is because the expanded portion of the cushion portion 140 is allowed to escape to the inside of the vehicle where there is enough space. The track in which the end point on the inner side of the open curve forming the cross section of the cushion portion 140 is a curve having an inflection point similar to the hysteresis curve, as illustrated in FIG.

  On the other hand, if a protector 80 that does not expand the front opening on the end portion close to the inflator 120 is used, the shape change of the cushion portion occurs at a steep angle as illustrated in FIG. At the point 189 where the cushion part 140 starts to be covered with the protector 180, a burst is likely to occur.

  FIG. 10 is a diagram illustrating the shape of the second end portion 180B close to the B pillar 106 in the protector 180 of FIG. 10A is a view of the second end portion 180B as viewed from the inside of the vehicle, FIG. 10B is a perspective view of the second end portion 180B, and FIG. 10C is a cross section of the second end portion 180B. It is a figure which illustrates transition of a shape.

  As illustrated in FIG. 1, the protector 180 covers the cushion portion 140 between the inflator 120 and the B pillar 106 on the side surface of the passenger compartment, and extends to just before the B pillar 106. In the cross section of the protector 180, the end point P on the vehicle inner side of the open curve that forms the cross section gently rises at the second end portion 180B close to the B pillar 106. That is, as the second end portion 180B is approached, the shape of the open curve sequentially changes to the section IV-IV, the section VV, and the section VI-VI as illustrated in FIG.

  Note that, compared to a short ascending track similar to the hysteresis curve of the first end portion 180A, the end point P on the vehicle inner side ascends along a long linear track at the second end portion 180B. As a result, the front edge of the open curve is expanded from the distance D3 to the distance D4. Such a shape of the flare-shaped second end portion 180B is referred to as a “gas rectification shape”.

  Even in the second end portion 180 </ b> B, the end point P on the inner side of the open curve rises to a height exceeding the upper end H at the center of the protector 180. On the other hand, the open curve maintains an arc shape or a substantially L shape.

  According to the above configuration, as illustrated in FIGS. 10A and 10B, the frontage that can be seen only from below at the center of the protector 180 can be seen from the inside of the vehicle even at the second end 180B. As described above, the protector 180 has a gas rectification shape in which the opening is gently enlarged in the flare shape even at the second end portion 180B close to the B pillar 106.

  FIG. 11 is a diagram for explaining the effect of the gas rectification shape of FIG. The front of the protector is expanded to the inside of the vehicle by the gas rectification shape. Also at the second end, the frontage extends to the inside of the vehicle as in the first end. According to this gas rectification shape, as illustrated in FIG. 11A, immediately before reaching the B pillar garnish, the cushion portion 140 gently inflates toward the inside of the vehicle, but toward the outside of the vehicle (side of the vehicle compartment). Inflation is prevented. Therefore, the cushion part 140 can be smoothly inflated and deployed in the vehicle interior without interfering with the pillar garnish of the B pillar 106.

  On the other hand, when the protector 80 that does not expand the front opening at the end close to the B-pillar is used, as illustrated in FIG. There is a possibility that the cushion part 140 is caught and the development is hindered.

(Second Embodiment)
FIG. 12 is a perspective view illustrating a second embodiment of the curtain airbag device according to the present invention. Hereinafter, description of the configuration common to the first embodiment will be omitted. The feature of the protector 210 of the curtain airbag device 200 according to the present embodiment is that a plurality of protector tabs integrated with the protector 280 are fixed to the vehicle body on the track in the longitudinal direction on the outer surface, as illustrated in FIG. 220. Since the plurality of protector tabs 220 provided on the substantially straight track are fixed to the vehicle body, the cushion portion 140 is not kinked during assembly.

  FIG. 13 is a cross-sectional view taken along the line CC of the curtain airbag device 200 of FIG. The cushion part 140 has the several cushion tab 170 fixed to a vehicle body in the upper end similarly to 1st Embodiment. The protector 210 further has a slit 196 (not visible behind the protector tab 220 in FIG. 12) at a position corresponding to the cushion tab 170 (inside of the protector tab 220). The cushion tab 170 is as shown in FIG. In addition, the slit 196 is inserted and fixed to the vehicle body. Thereby, the protector 210 is appropriately aligned with the cushion portion 140, and covers the cushion portion 140 at the correct position.

  The plurality of cushion tabs 170 at the upper end of the cushion part 140 are attached to the vehicle body in such a manner that they are overlapped with the protector tabs 220 at the corresponding positions. The cushion tab 170 and the protector tab 220 are fixed in such a manner that the cushion tab 170 and the protector tab 220 are overlapped in this manner, so that the protector 210 is properly aligned with the cushion portion 140 and covers the cushion portion at the correct position. That is, the positional relationship between the protector 210 and the cushion part 140 is fixed.

  According to the above configuration, the protector tab 220 integrated with the protector 210 is fixed to the vehicle body, so that the protector 210 is attached to the vehicle body without being twisted. If the protector 210 is properly aligned with the cushion part 140 and covers the cushion part 140 at the correct position, the cushion part 140 will not be twisted with respect to the vehicle body. Therefore, kinking of the cushion part 140 when the curtain airbag device 200 is assembled can be prevented.

  On the other hand, if the protector tab 220 is not provided, the rigidity of the resin protector 210 is higher than that of the cloth cushion part 140. However, if the protector 210 itself is kinked, the protector 210 and the cushion part 140 are properly aligned. However, the cushion part 140 may be kinked with respect to the vehicle body. This embodiment solves this problem.

  As illustrated in FIGS. 12 and 13, the protector 210 further includes a protrusion (rib 230) that is integral with the protector and protrudes into a gap between the protector 210 and the vehicle body. A plurality of ribs 230 may be provided as in the present embodiment, or a single rib 230 may be provided. Further, it is not necessary to have a shape that fills the gap, and it is not necessary to contact the vehicle body.

  According to the above configuration, since the rib 230 fills the gap, the pendulum-like unexpected rotation operation 234 using the fixing point 232 of the protector tab of FIG. In other words, since the cushion part 140 can be kept away from the vehicle body, the cushion part 140 that is inflated and deployed collides with the weather strip 236, and the weather strip 236 comes off and contacts the exposed edge 238 of the vehicle body panel to burst. The phenomenon is prevented.

(Third embodiment)
FIG. 14 is a perspective view illustrating a curtain airbag device according to a third embodiment of the present invention, and FIG. 15 is a sectional view taken along the line DD in FIG. Hereinafter, about the curtain airbag apparatus 300 concerning this embodiment, description is abbreviate | omitted about the structure which is common in 2nd Embodiment. A feature of the protector 250 in the third embodiment is that the protector 250 further includes an extending portion 240 that abuts on the upper surface of the passenger compartment ceiling 242. As illustrated in FIG. 14, the extending portion 240 may be provided directly below the highly rigid protector tab 220. According to such a configuration, when the occupant comes into contact with the passenger compartment ceiling 242 for some reason, it is possible to prevent the ceiling 242 from being blurred. The extending portion 240 need not always be in contact with the passenger compartment ceiling 242 and may have a clearance of 1 to 3 mm.

(Fourth embodiment)
FIG. 16 is a perspective view illustrating a curtain airbag device according to a fourth embodiment of the invention. In the protector 480 of the curtain airbag device 400 according to the present embodiment, the positions of the protector tab 220 and the cushion tab 170 are shifted, and they are overlapped and fastened together as in the third embodiment (FIG. 13). Is an impossible type. In such a case, the protector tab 220 and the cushion tab 170 are separately fixed to the vehicle body.

(Fifth embodiment)
FIG. 17 is a view illustrating a fifth embodiment of the curtain airbag device according to the present invention, and is a view of a modified version of the curtain airbag device 400 of FIG. 16 viewed in the vehicle front-rear direction. In the curtain airbag device 500 according to the present embodiment, a method of fixing the protector tab 520 of the protector 510 to the vehicle body alone is illustrated. A pantograph-like fixture 530 is integrally formed on the outside of the protector tab 520 of the curtain airbag device 500. As shown in FIG. 17A, the pantograph-like fixture 530 has a horizontally long rhombus when inserted into the hole provided in the roof side rail 110, and is opposite to the hole as illustrated in FIG. 17B. It becomes vertically long on the side, and the protector 500 can be fixed. By further inserting a pin or a screw or the like into the vertically elongated pantograph-like fixture 530, the pantograph-like fixture 530 does not become smaller than the hole again, so that stronger fixation is possible.

(Sixth embodiment)
FIG. 18 is a view illustrating a curtain airbag device according to a sixth embodiment of the present invention. FIG. 18 is a view of a modified version of the curtain airbag device 400 of FIG. In the curtain airbag device 600 according to this embodiment, a method of fixing the protector tab 620 of the protector 610 to the vehicle body alone is illustrated. The protector tab 620 of the curtain airbag device 600 is fixed to the vehicle body by an anchor-shaped fixture 630. As shown in FIG. 18, when the anchor-like fixture 630 is inserted into the hole provided in the roof side rail 110, the surrounding wing 630A is retracted so as not to interfere with it, and the wing using elastic force on the opposite side of the hole is used. 630A is exposed, and fixing is completed without leaving the hole.

(Seventh embodiment)
FIG. 19 is a view illustrating a seventh embodiment of the curtain airbag device according to the present invention. In the curtain airbag device 700 according to the present embodiment, as illustrated in FIG. 19A, the protector 730 and the cushion portion 140 are correctly positioned in the vicinity of the two folded portions of the wound cushion portion 140. Lines 710 and 720 for matching are drawn.

  This embodiment is a modification of the curtain airbag device 400 of FIG. That is, the positions of the protector tab 220 and the cushion tab 170 are shifted from each other, and it is impossible to overlap and fasten them together.

  If the protector tab 220 exists, the protector is not twisted with respect to the vehicle body. However, as shown in FIG. 16, the protector tab 220 and the cushion tab 170 may be misaligned and cannot be fastened together. In such a case, it is necessary to first align the cushion part 140 with the protector 180 and then attach the protector 180 to the vehicle body. If the cushion part 140 is not aligned with the protector 180, the cushion part 140 may not be inflated and deployed in an appropriate direction even though the cushion part 140 is twisted with respect to the vehicle body and the protector 180 is not twisted. Because there is.

  FIG. 19B is a view of the protector 730 used in the present embodiment as seen along the vehicle front-rear direction. FIG. 19B illustrates only the protector 730 and the cushion portion 140, and other elements are not shown. The alignment lines 710 and 720 may be provided in the vicinity of the folded portion of the cushion portion 140 as illustrated in FIG. 20, but may be provided in the folded portion itself. In any case, as shown in FIG. 19B, the lines 710 and 720 may be located at positions that are exposed to a position that can be seen from the outside when the cushion portion 140 is covered with the protector 730. Using these lines 710 and 720 as marks, the operator can correctly align the protector 730 and the cushion portion 140.

(Eighth embodiment)
FIG. 20 is a view illustrating an eighth embodiment of the curtain airbag device according to the present invention, and is a view of the curtain airbag device 800 according to the present embodiment as seen along the vehicle longitudinal direction. This embodiment is also a modification of the curtain airbag device 400 of FIG. That is, since the positions of the protector tab 220 and the cushion tab 170 are deviated and cannot be overlapped and fastened together, the cushion portion 140 needs to be aligned with the protector.

  As illustrated in FIG. 20, the protector 810 in the present embodiment integrally has a hook portion 810 </ b> A on its inner surface. Hook portion 810A is located in the vicinity of the end point on the vehicle interior side of protector 810, and has its tip directed to the center of the inner surface of protector 810. By accommodating one folded portion of the cushion portion 140 in the hook portion 810A, the operator can correctly align the protector 810 and the cushion portion 140.

  The hook portion 810A may be provided over the entire length of the protector 810 extending in the vehicle front-rear direction, or may be provided separately at several locations.

(Ninth embodiment)
FIG. 21 is a diagram illustrating a ninth embodiment of a curtain airbag device according to the present invention, and is a view of the curtain airbag device 900 according to the present embodiment as viewed in the vehicle front-rear direction. This embodiment is also a modification of the curtain airbag device 400 of FIG. That is, since the positions of the protector tab 220 and the cushion tab 170 are deviated and cannot be overlapped and fastened together, the cushion portion 140 needs to be aligned with the protector.

  As illustrated in FIG. 21, the protector 910 according to the present embodiment is formed by extending an end portion on the vehicle outer side to bend toward the vehicle inner side, thereby forming an extending portion 910 </ b> A. By accommodating the other folded portion of the cushion portion 140 in the extended portion 910A, the operator can correctly align the protector 910 and the cushion portion 140.

  The extending portion 910A may also be provided over the entire length of the protector 910 extending in the vehicle front-rear direction, or may be provided separately at several locations.

  The preferred embodiments of the present invention have been described above with reference to the accompanying drawings. However, the embodiments described above are preferred examples of the present invention, and other embodiments can be implemented or performed in various ways. Can be carried out. The invention is not limited to the detailed shape, size, configuration, and the like of the components shown in the accompanying drawings unless otherwise specified in the present specification. In addition, expressions and terms used in the present specification are for the purpose of explanation, and are not limited thereto unless otherwise specified.

  Therefore, it is obvious for those skilled in the art that various changes and modifications can be conceived within the scope of the claims, and these naturally belong to the technical scope of the present invention. It is understood.

  Moreover, in the said embodiment, although the example which applied the curtain airbag concerning this invention to the motor vehicle was demonstrated, it is also possible to apply to an aircraft, a ship, etc. besides a motor vehicle, and can obtain the same effect. it can.

  INDUSTRIAL APPLICABILITY The present invention can be used for a curtain airbag device that inflates and deploys along the side of a passenger compartment for the purpose of protecting passengers at the time of a side collision or rollover (rollover) of a vehicle.

100, 200, 300, 400, 500, 600, 700, 800, 900 ... curtain airbag device 102 ... vehicle 110 ... roof side rail 120 ... inflator 140 ... cushion part 142 ... main duct 170 ... cushion tab 172 ... bolt hole 174 ... Fixing bracket 176 ... Square bolt holes 180, 210, 250, 510, 610, 730, 810, 910 ... Protector 180A ... First end 180B ... Second end 192 ... Assist grip bracket 194 ... Anti-rotation part 196 ... slit 220, 520, 620 ... protector tab 230 ... rib 236 ... weather strip 238 ... edge 240 ... extension part 242 ... vehicle compartment ceiling

Claims (3)

In the curtain airbag device stored in the upper side of the passenger compartment,
Cushion that extends in the vehicle longitudinal direction, is stored in a state of being wound from the lower end toward the upper end, is fixed to the roof side rail of the vehicle with a tab attached to the upper end, and is supplied with gas to inflate and deploy downward When,
A long protector covering the cushion part;
With
The protector is fixed to the cushion portion with an adhesive tape and has an arcuate open curved cross section that opens downward, and the cushion portion is about to rotate together with the protector at the initial stage of expansion and deployment. An anti-rotation portion integral with the protector that prevents the rotation of the cushion portion and the protector by interfering with a fixing member that is fixed to the vehicle body at the periphery but not fixed to the protector. Curtain airbag device.   The curtain airbag device according to claim 1, wherein the rotation prevention unit protrudes from the protector.   3. The curtain according to claim 1, wherein the curtain airbag device further includes alignment means for aligning the wound cushion portion so that the protector covers the cushion portion at a predetermined position. 4. Airbag device.

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