JP2009078620A - Head protection air bag device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a head protection air bag device capable of restraining the hang-down of a portion between tabs of a curtain air bag (or both hanging down and rotation in a cross section). <P>SOLUTION: (1) The head protection air bag device 10 is provided with a clip 30 for supporting the curtain air bag 20 in a folded state between the tabs 21 on a vehicle body, and a clip has an engagement part 33 and a fragile part 34 broken by a deployment force of the curtain air bag and is formed at one member. The hang-down of the curtain air bag can be prevented by a simple constitution. (2) The clip 30 has a projection 39 for making a part of the curtain air bag abut on itself. A variation in the deployment direction can be prevented by suppressing the turning of the curtain air bag 20. (3) The device further has a cover formed of cloth for internally enveloping the curtain air bag 20 and formed with the fragile part broken by the deployment force of the curtain air bag. The turning of the curtain air bag 20 can be further restrained. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention is normally stored in a folded state (folding, folding, folding and folding, the same applies hereinafter) on the roof side of the vehicle, and deployed downward when a vehicle side collision occurs. The present invention relates to a head protection airbag device including a curtain airbag that protects the head of an occupant, and more particularly to a head protection airbag device that suppresses drooping and rotation of a portion between attachment portions of a folded curtain airbag.

In Patent Document 1, a plurality of tab portions (attachment portions) formed on the upper edge portion of the curtain airbag so as to protrude from each other in the vehicle front-rear direction are provided on the side surface of the body (roof side rail) via a detent means (bracket). The head protection airbag device fixed to the head is disclosed.
Patent No. 2920291

  In the conventional head protection airbag device, when the curtain airbag mounting pitch (interval between the tab portions 2) is large, as shown in FIG. 19, the portion 1a between the tab portions of the folded curtain airbag 1 hangs down. Or, as shown in FIG. 20, the folded curtain airbag 1 rotates in the left-right direction within the cross section. In FIG. 19, d indicates the amount of sag. As a result, the folded-back portion 3 of the curtain airbag is used as a peripheral part, for example, between the jump base 17 integrally formed on the upper end of the pillar garnish 16 and the inner panel 12 of the body 11, the roof lining 15 and the weather. There is a possibility that the curtains 1 may be caught between the strips 19 and the like, and the deployment behavior of the curtain airbag 1 at the time of a vehicle side collision may vary or malfunction.

  An object of the present invention is to provide a head protection airbag device that can suppress drooping of a portion between tab portions of a curtain airbag (or both drooping and in-section rotation).

The present invention for solving the above problems or achieving the above object is as follows.
(1) A curtain airbag having a plurality of tab portions provided at intervals on the upper edge and attached to the roof side portion of the vehicle with the tab portions;
A clip that holds the curtain airbag in the folded state between the tab portions and supports the vehicle body,
The clip is formed at the center of the clip and is wound around the curtain airbag at the portion between the tabs, the fixing part to the body formed at one end of the clip, the clip and the like formed at the other end of the clip A head protection airbag device having an engagement portion that engages with a clip portion other than the end portion, and a fragile portion that is broken by a curtain airbag deployment force, and is formed of one member.
(2) The head protection airbag device according to (1), wherein the clip has a protrusion that makes a part of the curtain airbag contact to suppress rotation of the curtain airbag.
(3) Any one of the curtain airbag in a folding direction of the curtain airbag, a notch formed in one end of the curtain airbag in the folding direction, and a folding direction folding portion of the curtain airbag The head protection airbag device according to (2), which is an end portion in the folding direction of a curtain airbag comprising the above.
(4) The head protection airbag device according to (2), wherein a part of the curtain airbag is an edge of a long hole through which the projection of the clip is formed, which is formed on the curtain airbag.
(5) It further has a cloth cover which includes a curtain airbag in a folded state and is formed with a fragile portion that is broken by the deployment force of the curtain airbag, and the clip is inserted into the cover by a notch or a long hole. The head protection airbag device according to (1) or (2), wherein a portion is formed and the clip is inserted through the clip insertion portion.

According to the head protection airbag device of (1) above, since the curtain airbag in the folded state is held between the tab portions by the clip and is supported by the vehicle body, the portion between the tab portions of the curtain airbag hangs down. Can be suppressed. As a result, it is possible to suppress biting of the curtain airbag into peripheral parts that may occur when the curtain airbag hangs down.
Moreover, since the clip is formed of one member having a winding portion, a fixing portion, an engaging portion, and a fragile portion, compared to the case where the clip is composed of a combination of a plurality of members, the clip to the vehicle body of the curtain airbag Installation is easy and the cost of the clip itself is low.

  According to the head protection airbag device of (2) above, since the clip has the protrusion that makes contact with a part of the curtain airbag, the rotation in the direction of contact with the protrusion in the cross section of the curtain airbag is restricted. Further, the rotation of the curtain airbag in the cross section is suppressed. As a result, a variation in the deployment direction of the curtain airbag at the time of a side collision, which may occur when the curtain airbag is rotated in the cross section, and the resulting bite into the peripheral parts of the curtain airbag are suppressed. The expansion and expansion of the bag can be stabilized.

  According to the head protection airbag device of (3) above, a part of the curtain airbag has one end in the folding direction of the curtain airbag, a notch formed at one edge of the curtain airbag in the folding direction, Since it may be any of the folding direction folding portions of the curtain airbag, the degree of freedom of the position of the protrusion is high. As a result, it is possible to provide a protrusion at a clip position that is effective for suppressing the in-section rotation of the curtain airbag. Moreover, when a part of curtain airbag is a notch part formed in the end edge of the folding direction of a curtain airbag, the axial direction movement of a curtain airbag can also be controlled with a clip.

  According to the head protection airbag device of (4) above, since the projection of the clip is inserted into the long hole formed in the curtain airbag, the curtain airbag is restrained from rotating in both the left and right directions in the cross section. . As a result, the rotation in the cross section of the curtain airbag is further suppressed compared to the case where the rotation in only one direction is suppressed, and the variation in the curtain airbag deployment direction and the resulting change to the peripheral parts of the curtain airbag Biting is suppressed. Further, when a part of the curtain airbag is an edge of a long hole formed in the curtain airbag, the movement of the curtain airbag in the axial direction can be restricted by the clip.

  According to the head protection airbag device of (5) above, the cover further includes a curtain airbag. The cover is formed with a clip insertion portion, and the clip is inserted through the clip insertion portion. Therefore, the rotation of the cover is suppressed by the clip. As a result, the contact friction between the cover and the curtain airbag also suppresses the rotation of the curtain airbag in the cross section, thereby suppressing variations in the deployment direction of the curtain airbag and its biting into peripheral parts of the curtain airbag. . If (5) is dependent on (2) above, the curtain airbag cross-section rotation is suppressed through suppression of the curtain airbag rotation in the cross section by the clip and suppression of rotation of the cover by the clip. As compared with the case of only the effect (2), variation in the deployment direction of the curtain airbag and the resulting bite into the peripheral parts of the curtain airbag are further suppressed. The

Below, the head protection airbag apparatus of this invention is demonstrated with reference to FIGS.
1 to 14 show Embodiment 1 of the present invention (head protection airbag device having a curtain airbag without cover), and FIGS. 15 to 18 show Embodiment 2 of the present invention (having a curtain airbag with cover). 1 shows a head protection airbag device.
Portions that are applicable to any embodiment of the present invention are labeled with the same reference numerals throughout all embodiments of the present invention. In the drawing, UP indicates the upper side, FR indicates the front in the vehicle front-rear direction, OUT indicates the vehicle width direction outer side, and IN indicates the vehicle width direction inner side.

[Example 1]
[Configuration of Example 1]
The configuration of the head protecting airbag device 10 according to the first embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 1, the head protection airbag device 10 of the present invention includes a curtain airbag (curtain airbag bag body) 20 and a clip 30. The head protection airbag device 10 further includes an inflator 60.

  As shown in FIGS. 1 to 3, the curtain airbag 20 is folded when not deployed, and includes a roof side portion of the vehicle (including a roof side, a roof side and a front pillar, or a roof side, a front pillar, and a rear pillar). It is mounted on the vehicle and deployed and inflated in the space between the occupant and the side of the vehicle when a side collision of the vehicle (including when a side collision is predicted or when a rollover is detected) Protect the passenger's head. The head protection airbag device 10 is disposed in a space above the pillar garnish 16 and the jump stand 17 between the inner panel 12 of the body 11 and the roof lining 15, and is attached to the inner panel 12 of the body 11. Fixed and fixed.

  The curtain airbag 20 is made of cloth. When not deployed, the curtain airbag 20 is folded. The method of folding the curtain airbag 20 may be any of folding (bellows folding), winding (roll folding), folding and folding. The curtain airbag 20 is supplied with an inflation gas at the time of a side collision of the vehicle, expands from a folded state to an unfolded state, expands and expands into a space between the occupant and the side of the vehicle, Protect the passenger's head.

  When the side collision sensor detects or predicts a side collision, or when the rollover sensor detects rollover, the inflator 60 detonates and supplies the inflation gas to the curtain airbag 20. Expand and inflate. When the curtain airbag 20 is deployed, the roof lining 15 is pushed and deformed toward the inside of the vehicle interior, and is deployed and inflated downward through a gap between the deformed roof lining 15 and the pillar garnish 16.

  The curtain airbag 20 has a plurality of tab portions 21 protruding upward at an upper edge thereof spaced apart from each other in the vehicle front-rear direction. The curtain airbag 20 is fixed to the vehicle body 11 with a tab portion 21.

  As shown in FIG. 4, the tab portion 21 is usually sandwiched between two metal plates 22 that are caulked to each other, and bolts 14 are passed through holes 23 provided in the tab portion 21 and the metal plate 22. The bolt 14 is fixed to the body 11 by being screwed through a hole of the inner panel 12 into a nut 13 welded to the back surface of the inner panel 12 of the vehicle body 11.

  Since the plurality of tab portions 21 are provided at intervals in the vehicle front-rear direction, the portion 20a between the tab portions 21 of the curtain airbag 20 in the folded state tries to bend downward by its own weight (FIG. 19) and in cross section. It tries to turn in (FIG. 20). In particular, when the portion 20a between the tab portions 21 of the curtain airbag 20 such as a portion between the pillars 61 (for example, a portion between the B pillar and the C pillar) is long below the inflator 60, the curtain airbag 20 The amount of sag of the portion 20a between the tab portions 21 is relatively large. If the portion 20a between the tab portions 21 of the curtain airbag 20 is bent or rotated, the curtain airbag 20 bites into peripheral parts (for example, between the jump stand 17 and the inner panel 12 of the body 11, the roof lining 15 and the weather strip 19). ) And the curtain airbag 20 may vary in deployment.

[Clip introduction and clip structure to prevent the air bag from hanging down between the tabs of the curtain airbag]
In the present invention, as shown in FIGS. 1 to 3, the curtain airbag 20 includes a tab portion in order to suppress drooping (and / or in-section rotation) of the portion between the tab portions 21 of the curtain airbag 20. While being held by the clip 30 at the portion between 21, it is supported by the body 11. The arrangement position of the clip 30 is, for example, just the central position between the tab portions 21 or the vicinity thereof, or between the adjacent pillars 61 and / or above the pillars 61 as shown in FIG. In order to effectively suppress the hanging of the portion between the tab portions 21 of the curtain airbag 20 with the clip 30 having a simple structure and low cost, the clip 30 desirably adopts the following structure.

  The clip 30 is formed of a flexible material, for example, a resin material, and is preferably formed of one member. However, what was formed in another member may be combined into a single member in a non-separable manner.

  As shown in FIGS. 5 to 8, for example, the clip 30 is formed at the clip central portion and wound around the curtain airbag 20 in a folded state at the portion between the tab portions and at one end of the clip. A fixing portion 32 to the body 11, a first portion formed at the other end of the clip, and a second portion formed at a clip portion other than the other end of the clip and capable of engaging with the first portion. The engaging portion 33 includes the weakened portion 34 that is broken by the deployment force of the curtain airbag 20.

  FIG. 5 shows a state where the clip 30 is deployed straight before the clip 30 is wound around the curtain airbag 20, and FIG. 6 shows a state where the clip 30 is wound around the curtain airbag 20 in a folded state. FIG. 7 shows a state where the clip 30 is broken at the fragile portion 34 and the curtain airbag 20 is deployed.

The winding part 31 is formed in a band shape.
The clip 30 is fixed to the inner panel 12 of the body by a fixing portion 32. When the fixing portion 32 is inserted into the clip hole 18 of the body inner panel 12, the size in the direction orthogonal to the insertion direction is elastically reduced, and after the insertion, the fixing portion 32 can return to the original size. 35. This type of fixing portion 32 enables a push-in type one-touch attachment of the clip 30 to the body 11 and facilitates the attachment.

  The engaging portion 33 desirably has a one-way engaging structure that engages only in one direction. 5 to 7 show an example of the engaging portion 33. However, the engaging portion 33 is not limited to this structure. 5 to 7, one end of the clip 30 is formed wider than the other end, and a hole 36 through which the other narrow end can be inserted is formed in the wide end. The concave / convex teeth 37 are formed on one surface of the narrow-width other end inserted through the hole 36, and when the concave / convex teeth 37 move in the insertion direction on the surface of the hole 36 facing the concave / convex teeth 37, the concave / convex teeth 37 pass in the insertion direction. However, when the concavo-convex teeth 37 move in the anti-insertion direction, a convex portion 38 that engages the concavo-convex teeth 37 and restricts the movement of the concavo-convex teeth 37 in the anti-insertion direction is formed. The surface of the convex portion 38 that is contacted when the concave / convex teeth 37 move in the insertion direction is formed as a tapered surface that inclines in the insertion direction of the concave / convex teeth 37 toward the tooth tip, and the concave / convex teeth 37 of the convex portion 38 are anti-inserted. The surface which contacts when moving in the direction is formed in a surface where the uneven teeth 37 are substantially orthogonal to the insertion direction of the insertion direction. With this structure, after winding the wrapping portion 31 around the curtain airbag 20 in a folded state, the narrow end of the clip 30 is inserted into the hole 36 near the wide end of the clip, and the narrow end of the clip 30 is inserted. After the end is pulled by hand and moved in the insertion direction and the curtain airbag 20 is tightened, even if the hand is released from the other narrow end of the clip 30, the engaging portion 33 is automatically locked and the clip 30 is tightened. Will not relax. The one-way engagement structure facilitates tightening of the curtain airbag 20 by the clip 30. Moreover, even if the size of the folded state of the curtain airbag 20 changes, the one-way engagement structure can be used in common. Such a one-way engagement structure is sometimes called a tie wrap. In addition, if the structure of the engaging part 33 is a clip-integrated one-way engaging structure, it is not restricted to the structure of FIGS.

The fragile portion 34 is broken by a force smaller than the force with which the engagement portion 33 is disengaged and broken by the deployment force of the curtain airbag 20. The fragile portion 34 includes, for example, a notch as shown in FIG. 5 (because it is the same as the fragile portion, the notch is also denoted by reference numeral 34). The notch 34 may be outside the winding of the clip 30 as shown in FIG. 6, or may be inside the winding as shown in FIG. FIG. 7 shows a state in which the clip 30 is broken at the fragile portion 34 and the curtain airbag 20 is deployed and inflated.
Since the fragile portion 34 is broken by the deploying force of the curtain airbag 20, the holding of the curtain airbag 20 by the clip 30 does not hinder the deployment of the curtain airbag 20.

[Regulation of circumferential posture and position of the portion between the tab portions 21 of the curtain airbag 20 by the clip 30]
As shown in FIGS. 5 to 9, the clip 30 has a protrusion 39 that abuts a part of the curtain airbag 20 to suppress rotation in the cross section of the curtain airbag 20. The protrusion 39 may be a simple protrusion (protrusion including only the inward protruding portion 40 in FIG. 9) or an L-shaped protrusion (protrusion in FIGS. 5 to 8). Hereinafter, various examples of the protrusion 39 will be described.

[Simple projection]
When the projection 39 is a simple projection, as shown in FIG. 9, the projection 39 has an inward projecting portion 40 that extends toward the inside of the winding of the clip 30 around the curtain airbag 20. A part of the curtain airbag 20 comes into contact with the inward projecting portion 40 of the clip 30, and the circumferential posture and position of the portion between the tab portions 21 of the curtain airbag 20 are regulated.

[L-shaped protrusion]
As shown in FIGS. 5 to 8, the protrusion 39 is bent at a substantially right angle with respect to the inward protruding portion 40 at the tip of the inward protruding portion 40, and is bent toward the concave and convex teeth 37 side of the engaging portion 33. You may have the L-shaped structure which has the longitudinal direction extension part 41 extended in the longitudinal direction of the clip 30. FIG.
When the protrusion 39 has the longitudinally extending portion 41, a gap is formed between the winding portion 31 and the longitudinally extending portion 41, and a part of the curtain airbag 20 is inserted there, and the curtain airbag Part of 20 abuts on the inward projecting portion 40, and the posture and position in the circumferential direction of the portion between the tab portions 21 of the curtain airbag 20 are regulated.

[Multiple protrusions]
As shown in FIG. 10, a plurality of protrusions 39 may be formed on one clip 30 at intervals in the clip longitudinal direction. Thereby, it is possible to cope with a plurality of angular positions of the curtain airbag 20.

[Example of the curtain airbag portion that is in contact with the protrusion being the edge of the curtain airbag]
As shown in FIG. 9, the curtain airbag 20 portion that is in contact with the protrusion 39 may be the edge 20 b of the curtain airbag 20. In this case, the rotation of the curtain airbag 20 is restricted in the direction in which the end edge 20 b is in contact with the protrusion 39. The rotation of the curtain airbag 20 is not restricted in the direction in which the edge 20b is separated from the protrusion 39, and the restriction of the rotation of the curtain airbag 20 in the direction in which the edge 20b is separated from the protrusion 39 is the same as that of the curtain airbag 20. This is due to friction with the clip 30.

[Example in which the curtain airbag portion that is in contact with the protrusion is a notch at the end of the curtain airbag]
As shown in FIG. 8, a notch 26 is formed at the end of the curtain airbag 20, and a protrusion 39 is fitted into the notch 26. Then, as shown in FIG. 6, a part of the curtain airbag 20 that is in contact with the protrusion 39 is formed from an edge 26 a of the notch 26 at the end of the curtain airbag 20 that extends in the longitudinal direction of the curtain airbag 20. Become. In this case, the rotation of the curtain airbag 20 is restricted in the direction in which the edge 26 a of the notch 26 is in contact with the protrusion 39. The rotation of the curtain airbag 20 is not restricted in the direction in which the edge 26a of the notch 26 is separated from the protrusion 39, and the rotation of the curtain airbag 20 in the direction in which the edge 26a of the notch 26 is separated from the protrusion 39 is restricted. This is due to friction between the curtain airbag 20 and the clip 30.
When the notch 26 is formed at the end of the curtain airbag 20, the edge 26 b of the notch 26 extending in the circumferential direction of the curtain airbag engages with the protrusion 39 and the longitudinal direction of the curtain airbag 20, and the protrusion 39 regulates the movement of the curtain airbag 20 in the longitudinal direction of the curtain airbag. Therefore, the protrusion 39 is positioned in the circumferential direction and positioned in the longitudinal direction of the curtain airbag 20.

[Example in which the curtain airbag portion in contact with the protrusion is a folded portion of the curtain airbag]
As shown in FIG. 11, the clip 30 is provided with a projection 39 at a portion corresponding to the folded portion 24 of the curtain airbag 20, and the folded portion 24 of the curtain airbag 20 is engaged with the projection 39, thereby The circumferential position of the airbag 20 may be restricted. In that case, a part of the curtain airbag 20 that is in contact with the protrusion 39 becomes the folded portion 24 of the curtain airbag 20.

[Example in which the curtain airbag portion abutted on the protrusion is the edge of the long hole of the curtain airbag]
As shown in FIG. 14, a long hole 25 is formed at the end of the curtain airbag 20 or in the vicinity thereof. The long hole 25 extends in the longitudinal direction of the curtain airbag 20 (vehicle longitudinal direction). The protrusion 39 is inserted into the long hole 25 and engages with the edge of the long hole 25 at the site of the inward protruding portion 40.
In this case, since the projection 39 engages with the longitudinal edge 25a of the long hole 25 regardless of whether the curtain airbag 20 is rotated in the left or right direction in the cross section, both the left and right directions in the cross section of the curtain airbag 20 are used. Is restricted. Even if the curtain airbag 20 is about to be displaced in the longitudinal direction of the vehicle, the projection 39 engages with the circumferential edge 25b orthogonal to the longitudinal edge 25a of the long hole 25, so that the curtain airbag 20 in the longitudinal direction of the vehicle. Movement or displacement is regulated.

[Modification of the engaging portion 33 of the clip 30]
The clip 30 may take the structure of the engaging portion 33 other than the type wrap. FIG. 12 shows an example. It can move in one direction (a direction in which the winding radius of the winding portion 31 decreases in a direction parallel to the opposing surface) on the opposing surfaces of both ends of the clip 30 with the winding portion 31 therebetween, but in the opposite direction Is formed with sawtooth-shaped portions 42 and 43 to be engaged. When both ends of the clip move away from each other in the direction perpendicular to the opposing surface, the sawtooth-shaped portions 42 and 43 are released and disengaged, but are pushed from the folded curtain airbag 20 from the inside. Therefore, the sawtooth-shaped portions 42 and 43 do not come off.
The configuration of the first embodiment can be applied in common to another embodiment (second embodiment) of the present invention.

[Operation of Example 1]
The operation and effect of the first embodiment of the present invention are as follows.
First, since the curtain airbag 20 in the folded state is held between the tab portions 21 and supported by the vehicle body with the clip 30, it is possible to suppress drooping due to the weight of the portion between the tab portions 21 of the curtain airbag 20. As a result, it is possible to suppress biting of the portion between the tab portions 21 of the curtain airbag, which may occur when the curtain airbag 20 hangs down, into peripheral components.

  In addition, since the clip 30 is formed of one member having the winding portion 31, the fixing portion 32, the engaging portion 33, and the fragile portion 34, the curtain air by the clip 30 is compared to the case where the clip 30 is composed of a combination of a plurality of members. The bag 20 can be easily attached to the vehicle body. Also, the cost of the clip 30 itself is low.

  Further, since the clip 30 has the protrusion 39 that makes a part of the curtain airbag 20 contact, the rotation in the direction of contacting the protrusion 39 in the cross section of the curtain airbag 20 is restricted. The rotation is suppressed. As a result, variation in the curtain airbag deployment direction at the time of a side collision, which may occur when the curtain airbag 20 rotates in the cross section, and the resulting bite into peripheral components of the curtain airbag 20 are suppressed, Deployment and inflation of the curtain airbag 20 can be stabilized.

  In addition, a part of the curtain airbag 20 that abuts the protrusion 39 includes one end portion in the folding direction of the curtain airbag 20, a notch portion 26 formed at one end edge in the folding direction of the curtain airbag 20, and the curtain airbag 20. Since any of the folding direction folding portions 24 may be used, the degree of freedom of the position of the protrusion 39 is high. As a result, the protrusion 39 can be provided at the clip position that is most effective for suppressing the in-section rotation of the curtain airbag 20. In addition, when a part of the curtain airbag 20 is a cutout portion 26 formed at one end edge in the folding direction of the curtain airbag 20, the movement of the curtain airbag 20 in the axial direction is also restricted by the clip 30. Can do.

Further, when the protrusion 39 of the clip 30 is inserted into the long hole 25 formed in the curtain airbag 20, the curtain airbag 20 is restrained from rotating in both the left and right directions within the cross section. As a result, the rotation in the cross section of the curtain airbag 20 is further suppressed as compared with the case where the rotation in only one direction is suppressed, and the variation in the curtain airbag deployment direction and the peripheral parts of the curtain airbag 20 due to the variation. Biting into the surface is suppressed. Further, when a part of the curtain airbag 20 is the edge of the long hole 25 formed in the curtain airbag 20, the movement of the curtain airbag 20 in the axial direction can be restricted by the clip 30.
The operations and effects of the first embodiment are also applied to the operations and effects of the other embodiments of the present invention.

[Example 2] [Configuration of Example 2]
As shown in FIGS. 15 to 18, the head protection airbag device 10 according to the embodiment of the present invention includes a fragile portion 51 that encloses a curtain airbag 20 in a folded state and breaks by the deployment force of the curtain airbag 20. A cloth cover 50 is further formed. The cover 50 may wrap the curtain airbag 20 in the folded state over the entire length of the curtain airbag 20 or may wrap a part of the curtain airbag 20 in the longitudinal direction. The cover 50 is made of, for example, cloth. The fragile portion 51 is made of, for example, a perforation and is broken by the deploying force of the curtain airbag 20. Reference numeral 55 denotes a cover stitching portion.

  The cover 50 includes a notch 53 (FIG. 16) formed at the end of the cover 50 or a long hole 54 (FIG. 17) formed in the cover 50 that holds the folded curtain airbag 20 so as not to unravel. A clip insertion part 52 is formed, and the protrusion 39 of the clip 30 passes through the clip insertion part 52. The clip 30 is fixed to the inner panel 12 of the body 11 by inserting the fixing portion 32 into the clip hole 18 of the inner panel 12 of the body 11 outside the cover 50.

  Since the clip insertion portion 52 includes the cutout portion 53 or the long hole 54, the movement of the cover 50 is restricted and positioned by the clip 30 in the circumferential direction and the longitudinal direction. When the cover 50 is restrained from being moved and positioned, the curtain airbag 20 is also restricted in movement in the circumferential direction and the longitudinal direction by the friction between the inner surface of the cover 50 and the outer surface of the folded curtain airbag 20.

The circumferential position restriction of the curtain airbag 20 may be performed by any of the following.
(A) Only the cover 50 is restricted in the circumferential direction by the clip 30, and the curtain airbag 20 is consequently restricted in the circumferential direction by friction between the inner surface of the cover 50 and the outer surface of the folded curtain airbag 20. .
(B) The position of the curtain airbag 20 and the cover 50 is simultaneously restricted in the circumferential direction by the clip 30.

[Operation of Example 2]
The head protection airbag device 10 according to the second embodiment further includes a cover 50 that encloses the curtain airbag 20, and a clip insertion portion 52 is formed in the cover 50, and the clip insertion portion 52 is connected to the clip 30. Since the protrusion 39 is inserted, when the rotation of the cover 50 is suppressed by the clip 30 (in the case of (A) above), the contact friction between the cover 50 and the curtain airbag 20 causes the curtain airbag 20 to move. The rotation in the cross section is also suppressed, and the variation in the curtain airbag deployment direction and the biting of the curtain airbag 20 into the peripheral parts are thereby suppressed.

  When both the rotation suppression of the cover 50 by the clip 30 and the rotation suppression of the curtain airbag 20 by the clip 30 are performed (in the case of (b) above), only the rotation suppression of the curtain airbag 20 by the clip 30 is performed. As compared with the case where the operation is performed (in the case of (A) above), the variation in the curtain airbag deployment direction and the bite into the peripheral parts of the curtain airbag 20 due to this are further suppressed.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an overall side view of a head protection airbag device according to a first embodiment of the present invention when the curtain airbag is not deployed (FIGS. 1 to 14 are also applicable to the curtain airbag portion of the second embodiment). It is a perspective view of the curtain airbag support part by the clip of the head protection airbag apparatus of Example 1 of this invention, and its vicinity. FIG. 3 is an enlarged sectional view taken along line 3-3 in FIG. 2. FIG. 4 is an enlarged sectional view taken along line 4-4 of FIG. It is a side view in the state where the clip of Drawing 1 was developed in the shape of a straight line. FIG. 2 is a cross-sectional view of the clip and curtain airbag of FIG. 1 when the curtain airbag is folded. FIG. 2 is a cross-sectional view of the clip and curtain airbag of FIG. 1 when the curtain airbag is deployed. It is a perspective view of a curtain airbag (at the time of folding) which has a clip of the state developed in a straight line, and a notch part in which the clip is fitted. It is an expanded sectional view of the clip which has the protrusion (it has only an inward protrusion part) with which the curtain airbag at the time of folding and the edge of a curtain airbag contact | abut. It is an expanded sectional view of the clip which has a plurality of protrusions with which the curtain airbag at the time of folding and the end part or notch part of a curtain airbag contact | abut. It is an expanded sectional view of the clip which has the protrusion with which the curtain airbag at the time of folding and the folding | turning part of a curtain airbag contact | abut. It is an expanded sectional view of the clip which has the curtain airbag at the time of folding, and a serrated engagement part. It is an expanded sectional view of the clip which has the weak part which changed the curtain airbag at the time of folding, and arrangement. (A) is a perspective view of a curtain airbag when folded with a long hole, and (B) is a cross-sectional view taken along line AA of (A), and is inserted into the curtain airbag when folded and its elongated hole. It is sectional drawing of a clip. It is an expanded sectional view of the curtain airbag at the time of folding of the head protection airbag apparatus of Example 2 of this invention, the cover containing a curtain airbag, and a clip. It is a perspective view of the cover which has a notch which encloses the curtain airbag at the time of folding, and a curtain airbag. It is a perspective view of the cover which has a long hole which encloses the curtain airbag at the time of folding, and a curtain airbag. It is the 18-18 line expanded sectional view of the cover which has a long hole which encloses a curtain airbag and a curtain airbag of FIG. It is a side view of the curtain air bag of the conventional folding state from which the part between tab parts hung down. It is a 20-20 line expanded sectional view of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Head protection airbag apparatus 11 Body 12 Inner panel 13 Nut 14 Bolt 15 Roofing 16 Pillar garnish 17 Jump stand 18 Clip hole 19 Weather strip 20 Curtain airbag 20a Inter-tab part 20b of curtain airbag End portion 21 Tab portion 22 Metal plate 23 Hole 24 Folded portion 25 Long hole 25a Longitudinal edge 25b Circumferential edge 26 Notch 26a Longitudinal edge 26b Circumferential edge 30 Clip 31 Winding portion 32 Fixing portion 33 Engaging portion 34 Fragile Part 35 internal gap 36 hole 37 uneven tooth 38 convex part 39 protrusion 40 inward protruding part 41 longitudinally extending part 42, 43 sawtooth 50 cover 51 (cover) weak part 52 clip insertion part 53 (cover) cut Notch 54 (Long hole in cover)
55 (cover) stitching part 60 inflator 61 pillar

Claims (5)

A curtain airbag having a plurality of tab portions provided at intervals on the upper edge and attached to the roof side portion of the vehicle with the tab portions;
A clip that holds the curtain airbag in the folded state between the tab portions and supports the vehicle body,
The clip is formed at the center of the clip and is wound around the curtain airbag at the portion between the tabs, the fixing part to the body formed at one end of the clip, the clip and the like formed at the other end of the clip A head protection airbag device having an engagement portion that engages with a clip portion other than the end portion, and a fragile portion that is broken by a curtain airbag deployment force, and is formed of one member.   The head protection airbag device according to claim 1, wherein the clip has a protrusion that abuts a part of the curtain airbag to suppress rotation of the curtain airbag.   A part of the curtain airbag is from one end of the curtain airbag in the folding direction, a notch formed in one end of the curtain airbag in the folding direction, or a folding end of the curtain airbag in the folding direction. The head protection airbag device according to claim 2, wherein the head protection airbag device is a folding direction end portion of the curtain airbag.   The head protection airbag device according to claim 2, wherein a part of the curtain airbag is an edge of a long hole through which the projection of the clip is formed, which is formed in the curtain airbag.   It further has a cloth cover that encloses the curtain airbag in a folded state and is formed with a fragile portion that is broken by the deployment force of the curtain airbag, and a clip insertion portion that includes a notch or a long hole is formed in the cover. The head protection airbag device according to claim 1, wherein the clip is inserted into the clip insertion portion.

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