JPWO2018083959A1 - Curtain airbag device - Google Patents

Abstract

To provide a curtain airbag device capable of preventing a pillar garnish from being damaged when the cushion is inflated and deployed. A curtain airbag device (100) is formed in an upper part inside a cushion (104) in the longitudinal direction of the vehicle and receives a gas from an inflator (102) to inflate and deploy, and a duct branched downward from the duct on the vehicle front side than the inflator. And the main chamber 146 in which gas flows from the duct and expands, the duct has a duct front end portion 149 located on the front side of the vehicle than a point where the duct branches into the main chamber, and the cushion in storage configuration The apparatus further comprises a band-shaped surrounding member 138 wound at a position at least partially overlapping the main chamber and having a length equal to or greater than the outer peripheral length of the cross section in the vehicle width direction at the time of inflation and deployment. , The slit 1 cuttable by the gas pressure of the gas flowing into the main chamber through the duct Having two. [Selected figure] Figure 1

Description

  The present invention relates to a curtain airbag apparatus provided with a cushion that inflates and deploys along a side wall of a vehicle cabin for the purpose of protecting an occupant at the time of a side collision or rollover (lateral rollover) of the vehicle.

  The curtain airbag device has a bag-like cushion that is inflated and deployed by gas in an emergency to receive and protect the occupant. The cushion needs to be deployed along the side walls of the cabin to cover all areas where the occupant's head and upper body may collide, even when the vehicle transitions from a side collision to a rollover. There is.

  For this reason, the cushion is accommodated in the upper portion of the side wall of the vehicle cabin in the longitudinal direction of the vehicle. That is, the cushion has a front pillar continuous to the vehicle front side of the roof side rail and a pillar trim (hereinafter, pillar garnish) covering the front pillar from the vehicle inner side from between the roof side rail and the cover covering the roof side rail from the vehicle inner side. It is extended to the middle and stored. In order to be able to store the cushion in such a limited storage space, the cushion is usually attached to the roof side rail or the front pillar in a rolled or folded state.

  Patent Document 1 describes an interior material structure of a vehicle provided with a top sealing (cover) covering a roof side rail, and a surrounding member adjacent to a pillar garnish, that is, at a boundary, surrounding a curtain airbag in a folded state. ing. In Patent Document 1, the surrounding member is provided close to the rear end of the pillar garnish so that deformation of the rear end of the pillar garnish can be suppressed, thereby preventing breakage of the pillar garnish at the time of deployment of the airbag. It can be done.

  Patent Document 2 describes a deployment assisting structure of a curtain airbag in which a deployment assisting plate is disposed at the boundary between a roof side rail and a pillar garnish. The deployment assisting plate is disposed between the airbag and the pillar garnish along the airbag at the time of non-deployment, and deforms along with the deployment behavior of the airbag. In Patent Document 2, the deformed deployment assisting plate spreads the pillar garnish to widen the gap formed between the pillar inner panel and the pillar garnish, thereby preventing the pillar garnish from being damaged when the air bag is deployed. It can be done.

Unexamined-Japanese-Patent No. 2010-137753 JP 2008-239127 A

  However, the techniques described in Patent Documents 1 and 2 provide an auxiliary member at the boundary between the roof side rail and the pillar garnish, and only adjust the deformation of the pillar garnish with the auxiliary member itself. Do not consider the timing of.

  An inflator that supplies gas to the cushion usually supplies gas to the cushion from a position at the center or behind the cushion stored in the vehicle longitudinal direction. Therefore, in the initial stage of inflation and deployment, the cushion usually has a portion housed between the roof side rail and the cover, which is housed between the front pillar and the pillar garnish on the front side than that. Expand and deploy before the front end. Then, for example, the rear end portion of the pillar garnish accommodating the portion of the cushion front end which expands late may be broken or chipped by the portion which expands first. Since such a phenomenon may impair the safety of the occupant, it is necessary to prevent the pillar garnish from being damaged when the cushion is deployed.

  An object of this invention is to provide the curtain airbag apparatus which can prevent that a pillar garnish is damaged at the time of inflation deployment of a cushion in view of such a subject.

  In order to solve the above problems, a typical configuration of a curtain airbag device according to the present invention is a curtain airbag device that inflates and deploys along a vehicle body side wall in a vehicle interior using gas, and a window on a side of the vehicle And an inflator for supplying gas from the upper end of the cushion, the cushion being formed in the upper part inside the cushion over the longitudinal direction of the vehicle and receiving the gas from the inflator to inflate and deploy. And a main chamber that branches downward from the duct on the vehicle front side relative to the inflator and in which gas flows from the duct and expands, and the duct is on the vehicle front side of a point where the duct branches to the main chamber The stored cushion has a duct front end located and is wound at a position where it at least partially overlaps the main chamber The belt-like enclosure member to be attached, further comprising an enclosure member having a length equal to or longer than an outer peripheral length of a cross section in a vehicle width direction of the duct at the time of inflation and deployment; It is characterized by having a fragile portion that can be cut by the gas pressure of the gas flowing into the chamber.

  According to the above configuration, the surrounding member is wound around the cushion in the stored state at a position where at least a part thereof overlaps with the main chamber provided in communication with the duct. The surrounding member has a length equal to or greater than the outer peripheral length of the cross section of the duct in the vehicle width direction at the time of inflation and deployment, and therefore allows the duct to perform inflation and deployment at the initial stage of inflation and deployment. Therefore, gas can flow through the expanded and deployed duct to the front end of the duct located on the front side of the main chamber. Here, the front end of the duct is housed, for example, between a vehicle body side wall of a front pillar of a vehicle and a pillar garnish mounted on the inner side of the vehicle so as to cover the front pillar.

  On the other hand, in the main chamber, gas does not easily flow in until the surrounding member is cut by the fragile portion at the initial stage of inflation and deployment, and the inflation and deployment is suppressed. As a result, the front end of the duct housed in the pillar garnish expands and deploys earlier than the main chamber, and the pillar garnish can be reliably pushed open. That is, the pillar garnish is not pushed open by the expansion of the main chamber. Thereafter, when the fragile portion of the surrounding member is cut by gas pressure, the gas flows into the main chamber, and the main chamber is expanded and deployed behind the front end of the duct. Therefore, according to the present invention, it is possible to prevent a phenomenon in which, for example, the rear end portion of the pillar garnish is broken or chipped by the inflating and developing main chamber.

  The above-described duct front end portion may be accommodated between a pillar garnish mounted on an inner side of a vehicle so as to cover a vehicle body side wall of the front pillar of the vehicle and the front pillar. Thus, the pillar garnish can be pushed open by the expansion and deployment of the duct front end that occurs prior to the expansion and deployment of the main chamber.

  The above-mentioned main chamber may be expanded and deployed behind the front end of the duct. As a result, after the front end of the inflating and deploying duct pushes the pillar garnish open, the main chamber is delayed and inflating and deploying. For this reason, the pillar garnish is not damaged by the main chamber which expands and deploys.

  The above-mentioned surrounding member may be formed of a cloth material, and the fragile portion may be a plurality of slits provided along the longitudinal direction of the cushion in the storage form. As a result, when the distance between the slits is narrowed or the length of the slits is increased, the timing at which the surrounding member is cut by the fragile portion can be advanced. Also, if the distance between the slits is increased or the length of the slits is shortened, the timing at which the surrounding member is cut by the fragile portion can be delayed. By adopting the slit as the fragile portion in this way, it is possible to easily adjust how much the expansion and deployment of the main chamber is delayed.

  The above cushion further comprises a sticking member to be stuck to a surrounding member surrounding the stored cushion, the sticking member fixing the surrounding member to the cushion without slack, and being breakable at the initial gas pressure of expansion and deployment It is good. As a result, it is possible to wrap and fix the surrounding member around the outer periphery of the cushion by sticking and pasting a sticking member such as a tape to the surrounding member. Therefore, the cushion surrounded by the surrounding member can be easily stored in the vehicle side wall in the vehicle longitudinal direction, and the workability is not impaired. In addition, since the sticking member can be broken at the initial gas pressure of expansion and deployment, it does not inhibit the deployment behavior of the cushion.

  The cushion may include a front chamber located on the vehicle front side of the main chamber, an upper portion of the front chamber in communication with the duct front end, and a lower portion of the front chamber in communication with the main chamber. As a result, although the gas flows into the front chamber from the front end of the duct after expansion and deployment of the duct and expands somewhat, the gas can also expand and deploy sufficiently from the main chamber after the surrounding member is cut. . Thus, the front chamber can function as a delay chamber that expands and deploys later than the main chamber.

  The duct front end portion of the above-mentioned cushion may be provided at a position capable of being accommodated between the vehicle body side wall of the front pillar of the vehicle and the pillar garnish provided on the vehicle inner side so as to cover the front pillar. Thus, the front end of the duct is located on the front side of the vehicle with respect to the point where the duct branches into the main chamber, and is accommodated between the vehicle body side wall and the pillar garnish. On the other hand, the surrounding member is wound at a position at least partially overlapping the main chamber. For this reason, the surrounding member is located on the vehicle rear side of the duct front end.

  According to the present invention, it is possible to provide a curtain airbag device capable of preventing the pillar garnish from being damaged when the cushion is inflated and deployed.

It is the schematic which illustrates the curtain airbag apparatus in embodiment of this invention. It is a figure which illustrates the state before the cushion of FIG. 1 is rolled. It is a figure which illustrates the site | part of the cushion of FIG. 1, and its cross section. It is a figure which illustrates the enclosure member of FIG. FIG. 5 is a cross-sectional view illustrating the deployment behavior of the cushion of FIG. 3; It is a figure which illustrates the state of the pillar garnish accompanying expansion and deployment of the cushion of FIG. It is a figure which illustrates the modification of the enclosure member of FIG.

DESCRIPTION OF SYMBOLS 100 ... Curtain airbag apparatus, 102 ... Inflator, 104 ... Cushion, 106 ... Vehicle, 108 ... Front seat, 110 ... Rear seat, 112, 114 ... Side window, 116 ... Front pillar, 118 ... Center pillar, 120 ... Rear pillar, 122: roof side rail, 124: pillar garnish, 126: cover, 128: rear end of pillar garnish, 130: clip, 132: base, 134: part of cushion, 136: part of cushion, 138, 138A , 138B: enclosure member, 140: tab, 142: strap, 144: duct, 146: main chamber, 148: front chamber, 149: duct front end portion, 150, 152: seam portion, 154, 156: communication port, 157: ... The remainder, 158a, 158b ... te Flop, 160 ... sewing line, 162,162A, 162B ... slit

  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 and the like shown in the embodiments are merely examples for facilitating the understanding of the invention, and the invention is not limited except as otherwise described. In the present specification and drawings, elements having substantially the same functions and configurations are denoted by the same reference numerals to omit repeated description, and elements not directly related to the present invention are not illustrated. Do.

  FIG. 1 is a schematic view illustrating a curtain airbag device according to an embodiment of the present invention. In the figure, the time of non-deployment (when stored) of the curtain airbag device is illustrated. Although the curtain airbag device illustrated in the drawings is for the right side of the vehicle, the curtain airbag device for the left side not shown also has the same symmetrical structure.

  The curtain airbag device 100 includes an inflator 102 which is a gas generator. The cushion 104 of the curtain airbag device 100 is inflated and deployed by the pressure of the gas supplied from the inflator 102 in an emergency such as a side collision to restrain the occupant. The cushion 104 is formed in a bag shape, for example, by sewing a base fabric constituting the surface on the front and back or by using OPW (One-Piece Woven).

  Vehicle 106 is a two-row seat vehicle in which front seat 108 and rear seat 110 are arranged from the front of the vehicle. Side windows 112 and 114 are installed on the side walls of the vehicle 106 from the front of the vehicle. In the vehicle longitudinal direction of each side window 112, 114, a pillar (pillar) supporting a roof (ceiling) is provided. These pillars are called a front pillar 116, a center pillar 118, and a rear pillar 120 from the front of the vehicle 106.

  The vehicle 106 has a roof side rail 122 continuous to the rear side of the front pillar 116. The roof side rail 122 is located on the upper side wall of the vehicle compartment of the vehicle 106 and forms a vehicle side wall together with the front pillar 116. The vehicle 106 further has a pillar garnish 124 and a cover 126 which are indicated by two-dot chain lines in the figure.

  The pillar garnish 124 is a resin member that covers the front pillar 116 from the inside of the vehicle. Although there is no clear boundary between the front pillar 116 and the roof side rail 122, in the present embodiment, the rear end portion 128 of the pillar garnish 124 is a boundary between the front pillar 116 and the roof side rail 122 for convenience. . The pillar garnish 116 is attached to the front pillar 116 by, for example, fitting a clip 130 (see FIG. 6) inserted from the vehicle inner side to a pedestal 132 provided on the front pillar 116. The cover 126 covers the roof side rail 122 from the inside of the vehicle.

  The cushion 104 of the curtain airbag device 100 is stored in a rolled (rolled) or folded state throughout the longitudinal direction of the vehicle. Specifically, a portion 134 of the cushion 104 is housed between the front pillar 116 and the pillar garnish 124. A portion 136 on the vehicle rear side of the portion 134 of the cushion 104 is housed between the roof side rail 122 and the cover 126.

  The cushions 104 housed in these limited storage spaces are further attached to the upper side wall of the vehicle interior by a plurality of tabs 140. Not only a portion 134 of the cushion 104 but also a strap 142 is accommodated between the front pillar 116 and the pillar garnish 124. The strap 142 is a string-like member, and its front end is attached to the front pillar 116 and its rear end is attached to the front end of the portion 134 of the cushion 104. The bag-like cushion 104 is inflated and deployed so as to cover the side windows 112 and 114 on the side of the vehicle.

  FIG. 2 is a view illustrating a state before the cushion 104 of FIG. 1 is rolled. The curtain airbag device 100 further includes a duct 144, a main chamber 146, and a front chamber 148. The duct 144 is formed on the upper or upper end in the cushion 104 in the front-rear direction of the vehicle, and inflates and deploys by receiving the gas from the inflator 102. The inflator 102 supplies gas from the upper end of the cushion 104.

  The main chamber 146 branches downward from the duct 144 on the vehicle front side of the inflator 102, and the gas flows from the duct 144 and expands. The inflated main chamber 146 restrains the occupant. The main chamber 146 is included in a portion 136 on the vehicle rear side of the portion 134 of the cushion shown in FIG. Furthermore, the portion 136 of the cushion 104 includes not only the main chamber 146 but also a duct 144 located above the main chamber 146.

  A part 134 of the cushion 104 is accommodated between the front pillar 116 and the pillar garnish 124 on the vehicle front side of the main chamber 146. In FIG. 2, for clarity of the illustration, hatching is applied to the front end portion (hereinafter referred to as “duct front end portion 149”) included in the portion 134 of the cushion 104 in the duct 144. As illustrated, the duct front end portion 149 is located forward of the vehicle at a point where the duct 144 branches into the main chamber 146. The portion 134 of the cushion 104 includes the front chamber 148 as well as the duct front end 149.

  The front chamber 148 is located on the vehicle front side of the main chamber 146 and is housed between the front pillar 116 and the pillar garnish 124 together with the duct front end portion 149. The duct front end portion 149, the main chamber 146 and the front chamber 148 are separated by seam portions 150, 152 as shown. The seam portions 150 and 152 are formed by joining base cloths on the front and back of the cushion 104, for example. An upper portion of the front chamber 148 communicates with the duct front end portion 149 at a communication port 154 near the front end of the cushion 104. The lower portion of the front chamber 148 is in communication with the main chamber 146 at a communication port 156 near the lower end of the cushion 104.

  FIG. 3 illustrates the portion 136 of the cushion 104 of FIG. 1 and its cross section. FIG. 3A is an enlarged view of a portion 136 of the cushion 104 around which the surrounding member 138 is wound. FIG.3 (b) is AA sectional drawing of Fig.3 (a). The cross section here shows the cross section of the cushion 104 in the vehicle width direction.

  As shown in FIG. 3B, a band-shaped surrounding member 138 is wound at a position where at least a part thereof overlaps with the main chamber 146 which constitutes the portion 136 of the cushion 104 in the stored state. The surrounding member 138, as shown in FIG. 3 (b), has a surplus portion 157 in a state of being wound around the cushion 104, and there is a slack. Therefore, the surrounding member 138 is fixed to the cushion 104 without slack by the remaining portion 157 being folded or the like by sticking the tapes 158a and 158b which are the sticking members shown in FIG. 3A.

  The tapes 158a and 158b fix the surrounding member 138 before expansion and expansion without slack to the cushion 104, but are fragile which can be easily broken by gas pressure in the early stage of the expansion and expansion, and will be described later It does not inhibit the expansion behavior of 104.

  FIG. 4 is a view illustrating the surrounding member 138 of FIG. FIG. 4A shows the enclosing member 138 before being wound around the cushion 104 in the stored state. FIG.4 (b) is B arrow directional view of Fig.4 (a).

  The surrounding member 138 is formed of, for example, a cloth material, and both ends thereof are sewn as indicated by a sewing line 160. The sewn encircling member 138 is passed through the cushion 104 in a rolled state, wound at a position where it at least partially overlaps with the main chamber 146 constituting the portion 136 of the cushion 104, and is further fixed by the tapes 158a and 158b. Ru.

  The surrounding member 138 has a slit 162 as a fragile portion. The slits 162 are provided in the cloth material at predetermined intervals and at predetermined lengths, and can be cut by the gas pressure of the gas flowing into the main chamber 146 through the duct 144.

  Hereinafter, the deployment behavior of the cushion 104 will be described. FIG. 5 is a cross-sectional view illustrating the deployment behavior of the cushion 104 of FIG. Fig.5 (a) is sectional drawing which shows the initial state of expansion deployment of the cushion 104 which follows the AA cross section of FIG.3 (b). FIG.5 (b) is sectional drawing which shows the state of the expansion | deployment expansion | deployment succeeding to FIG. 5 (a). The cross section here shows the cross section of the cushion 104 in the vehicle width direction.

  At the initial stage of inflation and deployment, gas supplied from the inflator 102 flows forward of the vehicle through a duct 144 formed at the top inside the cushion 104. For this reason, first, the duct 144 tries to expand and deploy. Here, as shown in FIG. 5A, the surrounding member 138 has a length equal to or longer than the outer peripheral length of the cross section of the duct 144 in the vehicle width direction at the time of inflation and deployment. Therefore, at the initial stage of the inflation and deployment of the cushion 104, the duct 144 can be sufficiently inflated and deployed even in a state of being enclosed by the enclosing member 138. The tapes 158 a and 158 b shown in FIG. 3 break easily as the duct 144 expands and spreads.

  The gas inflating the duct 144 first tries to flow into the main chamber 146 near the inflator 102. However, as shown in FIG. 5A, the main chamber 146 is surrounded by the surrounding member 138 at the initial stage of the expansion and deployment, so that the gas does not easily flow in, and the expansion and deployment is suppressed. Therefore, the gas passes through the expanded and deployed duct 144, and a portion 134 (see FIG. 2) of the cushion 104 housed between the front pillar 116 and the pillar garnish 124 located on the vehicle front side of the main chamber 146. That is, the air flows into the duct front end portion 149 preferentially.

  Subsequently, as shown in FIG. 5 (b), when the gas pressure becomes high, the duct 144 is further expanded, the slit 162 of the surrounding member 138 is broken, and the surrounding member 138 is cut. By cutting the surrounding member 138, the gas flows into the main chamber 146 behind the duct front end 149. That is, the expansion and expansion of the main chamber 146 is suppressed by the enclosure member 138 until the enclosure member 138 is cut by the gas pressure, and the timing of the expansion and deployment is delayed. As a result, the duct front end portion 149 housed between the front pillar 116 and the pillar garnish 124 expands and deploys before the main chamber 146.

  FIG. 6 is a view illustrating the state of the pillar garnish 124 accompanying the development of the cushion 104 of FIG. In the drawing, the duct front end portion 149 housed in the pillar garnish 124 is hatched as in FIG.

  The duct front end portion 149 inflates and deploys earlier than the main chamber 146 as described above. For this reason, the portion 134 of the cushion 104 can be pulled out from the pedestal 132 (see FIG. 1) by inflating and deploying so that the pillar garnish 124 can be reliably pushed open.

  The main chamber 146 expands and deploys behind the duct front end portion 149 after the surrounding member 138 is cut by gas pressure. That is, the pillar garnish 124 is not pushed open by the expansion of the main chamber 146. Therefore, according to the present embodiment, for example, the rear end portion 128 of the pillar garnish 124 can be prevented from being broken or chipped by the inflating and developing main chamber 146, and the safety of the occupant can be ensured.

  Further, although the gas flows into the front chamber 148 from the duct front end portion 149 through the communication port 154 and expands somewhat, the gas also flows from the main chamber 146 through the communication port 156 after the surrounding member 138 is cut. In, expand and expand fully. Thus, according to the present embodiment, the front chamber 148 can function as a delay chamber that expands and deploys more slowly than the main chamber 146.

  Furthermore, in the present embodiment, the cloth enclosure member 138 is passed through the rolled cushion 104 to stick the tapes 158 a and 158 b and fix the tape 104 without slack. For this reason, the size of the cushion 104 including the surrounding member 138 does not increase. In addition, when the casing member 138 is wound around and fixed to the cushion 104, a jig or the like is not necessary, so that the workability is improved.

  FIG. 7 is a view illustrating a modification of the enclosing member 138 of FIG. As compared with the slits 162 of the surrounding member 138, the surrounding member 138A shown in FIG. 7A has a smaller number of slits 162A, and the distance between the slits 162A is wider. Such a surrounding member 138A is less likely to be cut by gas pressure than the surrounding member 138, and can delay the timing of cutting at the initial stage of expansion and deployment. That is, according to the surrounding member 134A, expansion and deployment of the main chamber 146 can be further delayed.

  As compared with the slits 162 of the surrounding member 138, the surrounding member 138B shown in FIG. 7B has a longer slit 162B and a narrower interval between the slits 162B. Such a surrounding member 138B is easily cut by gas pressure as compared to the surrounding member 138, and can be cut earlier in the initial stage of expansion and deployment. That is, according to the surrounding member 134B, the timing of expansion and deployment of the main chamber 146 can be advanced compared to the case where the surrounding member 134 is used.

  By adopting the slits 162, 162A, 162B as the fragile portions of the surrounding members 134, 134A, 134B in this manner, it is possible to easily adjust how much the expansion and deployment of the main chamber 146 is delayed. However, the timing of expansion and deployment of the main chamber 146 is not limited to the slits 162, 162A, and 162B, and may be appropriately adjusted by changing the material and width of the surrounding members 134, 134A, and 134B.

  Although the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, it goes without saying that the present invention is not limited to such examples. It is obvious that those skilled in the art can conceive of various changes or modifications within the scope of the claims, and it is understood that they are naturally within the technical scope of the present invention. Be done.

  Although the curtain airbag according to the present invention is applied to a car in the above embodiment, the present invention can also be applied to an aircraft or a ship other than a car, and the same effects can be obtained. it can.

  INDUSTRIAL APPLICABILITY The present invention can be used for a curtain airbag device provided with a cushion that inflates and deploys along a side wall of a vehicle cabin for the purpose of protecting an occupant at the time of a side collision or rollover (lateral rollover) of the vehicle.

Claims (7)

In a curtain airbag device that inflates and deploys along a vehicle body side wall in a vehicle compartment using gas.
A bag-like cushion that expands and deploys to cover the window on the side of the vehicle;
An inflator for supplying gas from the upper end of the cushion;
The cushion is
A duct which is formed in an upper portion inside the cushion and extends in the longitudinal direction of the vehicle and receives gas from the inflator to expand and deploy
And a main chamber which branches downward from the duct on the vehicle front side of the inflator and in which gas flows from the duct and expands;
The duct has a duct front end located on the vehicle front side of a point where the duct branches into the main chamber,
The cushion in the storage form is a band-shaped enclosure member wound at a position at least partially overlapping the main chamber, and the enclosure member having a length equal to or longer than an outer peripheral length of a cross section in the vehicle width direction of the duct at the time of inflation and deployment. And further
The curtain airbag device, wherein the surrounding member has a fragile portion that can be cut by gas pressure of gas flowing into the main chamber through the duct at an early stage of inflation and deployment.   The curtain airbag device according to claim 1, wherein the duct front end portion is housed between a vehicle body side wall of a front pillar of a vehicle and a pillar garnish attached to an inner side of the vehicle so as to cover the front pillar. .   The curtain airbag device according to claim 2, wherein the main chamber inflates and deploys behind the front end of the duct. The surrounding member is formed of a cloth material, and
The curtain airbag device according to any one of claims 1 to 3, wherein the fragile portion is a plurality of slits provided along the longitudinal direction of the cushion of the storage form. The cushion further includes an attaching member attached to the surrounding member surrounding the cushion in the storage mode,
The curtain airbag according to any one of claims 1 to 4, wherein the sticking member fixes the surrounding member to the cushion without slack and can be broken at an initial gas pressure of expansion and deployment. apparatus. The cushion comprises a front chamber located on the vehicle front side of the main chamber,
The curtain air according to any one of claims 1 to 5, wherein an upper portion of the front chamber is in communication with the front end of the duct, and a lower portion of the front chamber is in communication with the main chamber. Bag equipment.   The front end portion of the duct of the cushion is provided at a position that can be accommodated between a vehicle body side wall of a front pillar of a vehicle and a pillar garnish provided on the inner side of the vehicle so as to cover the front pillar. The curtain airbag apparatus of any one of 1 to 6.

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