JP2015039977A - Curtain airbag device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a curtain airbag device capable of physically preventing an airbag from twisting by 360 degrees in installation, while restraining an increase in cost.SOLUTION: The curtain airbag device 1 stored above a cabin, comprises an inflator 12, the airbag 11 having a cylindrical storage part 11a for storing the inflator 12 and a body part 11b extending in the longitudinal direction in a state of being connected to the storage part 11a via a connection part 11c and inflating-deploying by gas supplied from the inflator 12 and a protective member 14 installed around the body part 11b in a wound state or a folded-up state with the longitudinal direction as the axis. An extension part 14b of the protective member 14 overlaps with the connection part 11c in the longitudinal direction.

Description

  The present invention relates to a curtain airbag device housed above a passenger compartment.

  For example, the curtain airbag device described in Patent Document 1 is configured to have an airbag that inflates and deploys in a curtain shape along the side surface of the vehicle interior. In such an airbag, a main body portion of the airbag extending in the longitudinal direction (vehicle longitudinal direction) is wound or folded around the longitudinal direction, and a plurality of longitudinal portions are arranged. It is attached to the inner panel etc. and stored above the passenger compartment. Here, since the airbag in a state of being wound or folded around the longitudinal direction is easily twisted, there is a possibility that the airbag is erroneously attached in a state of being twisted 360 degrees. Therefore, various devices for preventing such twisting have been taken.

  For example, in Patent Document 1, a storage portion for storing a twisting prevention member is sewn to an airbag, and the twisting prevention member is stored in the storage portion to prevent twisting of the airbag. Further, in the airbag described in Patent Document 2, a mark that functions as a twist identification unit is attached to the airbag, so that the operator can identify the twist of the airbag. Moreover, in the airbag described in Patent Document 3, twisting of the airbag is suppressed by providing a bridge portion that connects the vicinity of two gas inlet portions provided in the front-rear direction.

JP 2006-151277 A Japanese Patent No. 3113777 JP 2006-88837 A

  However, in the airbag of Patent Document 1, it is necessary to separately provide a member for preventing twisting in order to prevent twisting, and further, sewing for housing this member in the airbag is required, resulting in an increase in cost. There was a risk. Further, since the airbag of Patent Document 2 is not physically configured to prevent twisting, there is a risk that if the operator overlooks the mark, the airbag is attached in a twisted state of 360 degrees. . Moreover, in the airbag of patent document 3, since it is necessary to provide a bridge part additionally, there existed a possibility that cost might rise like the airbag of patent document 1. FIG.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a curtain airbag device capable of physically preventing the airbag from being twisted 360 degrees at the time of attachment while suppressing an increase in cost. It is to provide.

  A curtain airbag device according to the present invention is a curtain airbag device housed above a passenger compartment. The curtain airbag device extends in the longitudinal direction in a state of being connected to the inflator and the inflator via a connecting portion, and is supplied from the inflator. An airbag having a main body portion that is inflated and deployed by a gas, and a protective member that is attached around the main body portion in a state of being wound or folded around the longitudinal direction. Is characterized by overlapping with the connecting portion in the longitudinal direction.

  In the present invention, the airbag has a main body portion extending in the longitudinal direction, and a connection portion connecting the inflator and the main body portion. And the main-body part of an airbag is the state wound by the longitudinal direction as the axis | shaft, or the folded state, The protection member is provided in the circumference | surroundings. Since the protective member overlaps with the connecting portion of the airbag in the longitudinal direction, when the main body portion of the airbag is to be twisted, the protective member comes into contact with the connecting portion and prevents the main body portion from being twisted further. Therefore, it can prevent attaching an airbag in the state twisted 360 degrees. That is, according to the curtain airbag device of the present invention, a dedicated part for preventing the twisting of the airbag is not required, so that an increase in cost can be suppressed and the airbag is physically prevented from being twisted 360 degrees at the time of mounting. It becomes possible.

  Furthermore, in the curtain airbag device according to the present invention, a portion of the protective member that overlaps with the connection portion in the longitudinal direction is formed at a position separated from the connection portion in a circumferential direction with the longitudinal direction as an axis. It is preferable that the extended portion.

  If the airbag cannot be twisted at the time of attaching the airbag, workability at the time of attachment may be reduced. Therefore, as described above, if the extending portion which is a portion overlapping the connecting portion of the protective member is separated from the connecting portion in the circumferential direction, it is possible to allow some twisting of the airbag and Workability can be ensured.

It is a side view which shows the whole curtain airbag apparatus concerning this invention. It is an enlarged view of the area | region shown by II of FIG. It is sectional drawing which looked at the III-III cross section of FIG. 2 from the rear side. It is sectional drawing which looked at the IV-IV cross section of FIG. 2 from the rear side.

  Hereinafter, embodiments of a curtain airbag device according to the present invention will be described with reference to the drawings. FIG. 1 is a side view showing the entirety of a curtain airbag device according to the present invention. As shown in FIG. 1, a curtain airbag device 1 according to this embodiment includes an airbag 11 that inflates and deploys in a curtain shape along a side surface of a vehicle interior, and an inflator 12 that supplies gas (gas) to the airbag 11. And is housed above the side surface of the passenger compartment in a state in which the airbag 11 is wound. Although such a curtain airbag device 1 can be provided on both the left and right sides of the vehicle, the curtain airbag device 1 housed above the right side of the vehicle will be described below.

  The airbag 11 includes a housing portion 11a formed in a cylindrical shape for housing the inflator 12, and a main body portion 11b extending in the front-rear direction (longitudinal direction) of the vehicle. It is attached to the inner panel or the like by clips 13a to 13g while being wound around the front-rear direction. Further, in the present embodiment, the accommodating portion 11a also has a shape extending in the front-rear direction similarly to the main body portion 11b, and the curtain airbag device 1 before inflating and deploying has an elongated shape in the front-rear direction as a whole.

  FIG. 2 is an enlarged view of a region indicated by II in FIG. As shown in FIG. 2, the accommodating part 11a and the main-body part 11b of the airbag 11 are mutually connected at an acute angle via the connection part 11c so that it may make a Y shape. Then, when the inflator 12 is actuated by a signal from a sensor (not shown) that detects a vehicle collision (particularly a side collision) or a rollover, as shown by an arrow in FIG. 2, it passes through the accommodating portion 11a and the connecting portion 11c. The airbag 11 is sewn so that gas is supplied to the main body 11b. When the gas is supplied to the main body portion 11b, the main body portion 11b expands and develops in a curtain shape downward along the side surface of the vehicle interior, and protects the occupant from side impacts.

  Here, when the main body portion 11b of the airbag 11 is inflated and deployed, for example, a protective member 14 made of resin is provided around the main body portion 11b in order to prevent damage to the base fabric due to contact with components such as an inner panel. It is provided so as to cover a part of.

  FIG. 3 is a cross-sectional view of the III-III cross section shown in FIG. 2 as seen from the rear side. As shown in FIG. 3, in order to protect the main body 11b of the airbag 11 from contact with the inner panel or the like, a protective member 14 is provided on the inner panel side (outside) of the wound main body 11b. Yes. The protection member 14 has a halved shape having an arc-shaped cross-sectional shape so as to follow the outer peripheral surface of the main body portion 11b of the airbag 11 that is wound and has a substantially circular cross section.

  The protective member 14 is attached to the main body 11b by a paper tape 15 (see FIG. 2) at an appropriate position in the front-rear direction so that the protection member 14 is not greatly displaced from the main body 11b of the airbag 11. In particular, in order to prevent the protective member 14 from shifting in the front-rear direction with respect to the main body part 11 b, a notch part 14 a is provided in a partial region of the protective member 14 in the front-rear direction. A paper tape 15 is wound around the inside. When the main body portion 11b is inflated and deployed, the paper tape 15 is torn by the impact, so that the main body portion 11b is not inflated and deployed.

  When the curtain airbag device 1 configured as described above is attached to, for example, the inner panel, the inflator 12 is first attached to the inner panel using a predetermined fixture. Next, the protective member 14 fixed to the main body 11b of the airbag 11 with the paper tape 15 is attached to the inner panel using a predetermined fixing tool, and finally the clips 13a to 13g provided on the main body 11b of the airbag 11 are attached. By sequentially attaching to the inner panel, the attachment of the curtain airbag device 1 is completed. At this time, the main body 11b wound around the front-rear direction has an elongated shape in the front-rear direction and is easily twisted about the front-rear direction. Therefore, there is a possibility that any of the clips 13a to 13g is attached to the inner panel in a state where the main body portion 11b is twisted 360 degrees.

  Therefore, in the present invention, as shown in FIG. 2, the main body 11 b is configured by forming an extending portion 14 b that overlaps with the connection portion 11 c of the airbag 11 in the overlap region OL in the front-rear direction. Is prevented from being attached while being twisted 360 degrees. Hereinafter, this point will be described.

  4 is a cross-sectional view of the IV-IV section of FIG. 2 as viewed from the rear side. FIG. 4a shows a state before the main body portion 11b is twisted, and FIG. 4b shows the main body portion 11b in the direction of the arrow in FIG. It shows the state when twisted clockwise. As shown in FIG. b, when the main body portion 11b of the airbag 11 is to be twisted, the extension portion 14b of the protective member 14 comes into contact with the connection portion 11c of the airbag 11, and the main body portion 11b is twisted further. To prevent. Therefore, it can prevent attaching the main-body part 11b of the airbag 11 in the state twisted 360 degree | times.

  Thus, according to the curtain airbag device 1, in order to prevent the main body portion 11b of the airbag 11 from being twisted, the extending portion 14b that is a part of the protective member 14 that protects the main body portion 11b is used. Therefore, an increase in cost can be suppressed. Furthermore, since the extension part 14b of the protection member 14 contacts the connection part 11c of the airbag 11, it is possible to physically prevent the main body part 11b of the airbag 11 from being twisted 360 degrees during attachment. Needless to say, the same effect can be obtained even when the main body 11b is twisted clockwise in FIG.

  Furthermore, in the curtain airbag device 1 of the present embodiment, the portion of the overlapping region OL that overlaps the connecting portion 11c of the airbag 11 in the front-rear direction of the extending portion 14b of the protection member 14 is shown in FIG. As shown, it is in a position separated from the connecting portion 11c in the circumferential direction with the front-rear direction as an axis. If the main body 11b of the airbag 11 cannot be twisted at all, the workability at the time of attachment may be lowered. However, as described above, the extension 14b of the protective member 14 is connected in the circumferential direction. If it is separated from the portion 11c, a slight twist of the main body portion 11b can be allowed, and workability at the time of attachment can be ensured.

  Moreover, in this embodiment, as shown in FIG. 2, the line-shaped mark ML extended in the front-back direction is attached | subjected to the main-body part 11b of the airbag 11. As shown in FIG. By providing such a mark ML, the operator can easily recognize the twist of the main body part 11b by visual observation, and more reliably prevent the main body part 11b from being attached in a state of being twisted 360 degrees. Is possible.

  In addition, this invention is not limited to the said embodiment, Unless it deviates from the meaning, it is possible to combine the element of the said embodiment suitably, or to add a various change.

  For example, the part of the overlapping region OL that overlaps with the connecting portion 11c of the airbag 11 in the front-rear direction of the protective member 14 may be in a position close to the connecting portion 11c in the circumferential direction with the front-rear direction as an axis.

  Moreover, in the said embodiment, although the curtain airbag apparatus 1 shall be accommodated above the side surface of a compartment, upper front side of a compartment so that it may inflate and expand when a vehicle collides forward or when it collides, It may be stored in the rear upper side, the central part upper side, or the like. In this case, the left-right direction of the vehicle corresponds to the “longitudinal direction” in the present invention.

  Moreover, in the said embodiment, although the main-body part 11b of the airbag 11 shall be accommodated in the state wound around the front-back direction, the main-body part 11b is accommodated in the folded state centered on the front-back direction. May be.

  Moreover, in the said embodiment, although the protection member 14 is provided only in the main body part 11b of the rear side with respect to the connection part 11c of the airbag 11, it is provided only in the main body part 11b of the front side with respect to the connection part 11c. Alternatively, it may be provided on the main body part 11b on both the front and rear sides with respect to the connection part 11c.

  Moreover, in the said embodiment, although the accommodating part 11a and the main-body part 11b of the airbag 11 shall be connected at an acute angle via the connection part 11c, it is indispensable requirements for this invention to connect in this way. is not. For example, you may connect the accommodating part 11a via the connection part 11c at a substantially right angle with respect to the main-body part 11b. However, since it is generally easier to secure the space for housing the inflator 12 in the front-rear direction, the housing part 11a and the main body part 11b are made substantially parallel along the front-rear direction as in the above embodiment, It is preferable to connect the accommodating portion 11a and the main body portion 11b at an acute angle.

1: Curtain airbag device 11: Air bag 11a: Housing portion 11b: Main body portion 11c: Connection portion 12: Inflator 14: Protection member 14b: Extension portion

Claims (2)

In the curtain airbag device stored above the passenger compartment,
An inflator,
An airbag having a main body that extends in a longitudinal direction in a state of being connected to the inflator via a connecting portion and is inflated and deployed by a gas supplied from the inflator;
A protective member attached around the main body in a state of being wound or folded around the longitudinal direction;
With
The curtain airbag device according to claim 1, wherein the protective member overlaps the connecting portion in the longitudinal direction.   The part which overlaps with the said connection part in the said longitudinal direction among the said protection members is the extension part formed in the position spaced apart from the said connection part in the circumferential direction centering on the said longitudinal direction. Curtain airbag device.

Images