JP5972856B2 - Curtain airbag device - Google Patents

Description

  The present invention relates to a curtain airbag device provided with a cushion member that inflates and deploys along a side surface in a vehicle compartment for the purpose of protecting passengers at the time of a side collision or rollover (rollover) of a vehicle.

  Modern vehicles are almost equipped with airbags as standard. An airbag is a safety device that operates in an emergency such as a vehicle collision, and inflates and deploys with gas pressure to receive and protect an occupant. There are various types of airbags depending on the installation location and application. For example, a front airbag is provided in the center of the steering wheel in order to protect the driver from collisions in the front-rear direction. In addition, a curtain airbag that inflates and deploys along the side window is provided in the vicinity of the ceiling of the wall portion in order to protect the occupant from a side collision and subsequent rollover (rollover).

  The cushion member of the curtain airbag has a large shape that covers the side window etc. of the side wall of the vehicle body, and is wound from below, folded, or both of them to form a slender storage form and the upper part of the side wall of the vehicle body It is mounted on. Such a curtain airbag may be provided with a resin protector, a cover member, or the like for the purpose of holding the storage form or smoothly inflating and deploying in a target direction (for example, Patent Document 1). . These protectors and the like have a shape along a part of the cushion member in the storage form, the inflator, and the like, and mainly cover the side wall side of the cushion member and the inflator. By providing a protector or the like, the cushion member can obtain a reaction force from the cover member or the like when inflated and deployed, and can be smoothly deployed in the target direction. On the other hand, since the useless behavior such as the cushion member trying to expand in a direction other than the target direction is suppressed, the cushion member can also be prevented from interfering with other members on the side of the vehicle body.

JP 2006-69248 A

  In patent document 1, the cushion member and the protector are fixed with a tape. In the case of such a fixing method, the place to be fastened is different for each product, and the diameter of the cushion member in the elongated storage form varies. If the diameter management cannot be performed accurately in this way, there is a possibility that the mounting operation of the cushion member on the side wall of the vehicle body may be hindered. Further, if it is intended to keep the same exact position for each product, it is necessary to pay attention to it, which causes a reduction in work efficiency.

  In view of such a problem, the present invention can accurately manage the diameter of a cushion member in a storage form, and can improve work efficiency when fixing the cushion member and the protector. An object is to provide an airbag device.

  In order to solve the above-mentioned problems, a typical configuration of a curtain airbag device according to the present invention is configured in a bag shape, and is wound and folded or both of which are elongated in the vehicle longitudinal direction. A cushion member mounted on the vehicle body side wall in a storage form, a protector that covers at least the vehicle body side wall of the cushion member in the storage form, a protruding portion that protrudes from the outer peripheral surface of the protector, and a cushion member that is wound together with the protector A winding member having one end attached to the cushion member, and first and second engagement holes that are provided at intervals in the winding member and engage with the protrusions. The winding member extends from one end, is folded back at the longitudinal edge of the protector, and is set to the protector and the protector by engaging the first engagement hole with the protrusion. The periphery of the cushion member of the housing forms a state wound at least around, and wherein engaging the second engagement hole in the projecting portion.

  According to the said structure, the winding member at the time of fixing a cushion member and a protector by the 1st and 2nd engagement hole provided in the winding member, and the protrusion part provided in the outer peripheral surface of a protector The winding position can be accurately determined without variation. Thereby, the diameter of the cushion member used as the accommodation form can be managed correctly. Further, the operator can know the winding position of the winding member by the protruding portion, and even when winding the winding member, it can be easily wound only by engaging the engaging hole with the protruding portion. Therefore, it is possible to improve work efficiency.

  The winding member may be provided with a fragile portion that breaks when the cushion member expands and deploys. With this configuration, the winding member is reliably broken at the fragile portion when the cushion member is inflated and deployed, so that the cushion member can be rapidly inflated and deployed.

  The winding member may be attached to the cushion member by sewing. Thereby, it becomes possible to attach a winding member to a cushion member easily and firmly.

  The protrusion may be provided in the vicinity of the edge in the longitudinal direction of the protector. Thereby, in the vicinity of the edge in the longitudinal direction of the protector, the winding member folded back can be fixed. Further, by providing a protrusion near the longitudinal edge of the protector, the length of the winding member can be shortened to the minimum.

  ADVANTAGE OF THE INVENTION According to this invention, the diameter of the cushion member used as the storage form can be managed correctly, and the curtain airbag apparatus which can aim at the improvement of the working efficiency at the time of fixing a cushion member and a protector is provided. can do.

It is the figure which illustrated the curtain airbag device (airbag) concerning the embodiment of the present invention. It is typical sectional drawing which illustrates the expansion | deployment expansion | deployment of the cushion member of FIG. It is the elements on larger scale of the airbag illustrated to Fig.1 (a). It is AA sectional drawing of FIG.3 (d). It is a figure which illustrates the modification of the airbag illustrated in FIG.

  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.

  FIG. 1 is a diagram illustrating a curtain airbag device (airbag 100) according to an embodiment of the present invention. FIG. 1A is a view of the side wall of the vehicle body as viewed from the inside of the vehicle, and illustrates the storage form of the cushion member 102 of the airbag 100. The cushion member 102 is a part that is inflated and deployed to protect the occupant in an emergency, and FIG. 1B illustrates the cushion member 102 being inflated and deployed. In the present application, the expression “upper” indicates the vehicle ceiling direction, and the expression “lower” indicates the vehicle floor direction.

  As illustrated in FIG. 1 (a), the cushion member 102 is folded, wound, or both of them to form a storage configuration that is elongated in the vehicle front-rear direction. It is attached to the roof side rail 104). Usually, the roof side rail 104 is covered with a roof trim (not shown). That is, the cushion member 102 is housed in a space between the roof side rail 104 and the roof trim, and is not visible from the vehicle compartment where the passenger is present. Therefore, it should be noted that the cushion member 102, which is originally invisible from the vehicle interior, is visualized by omitting the roof trim even if there is an explanation “viewing the cushion member 102 from the vehicle interior” in the text.

  The airbag 100 includes an inflator 108, which is a gas generator, at the center of the upper edge of the cushion member 102. The cushion member 102 is inflated by the pressure of gas supplied from the inflator 108 to restrain the occupant. The inflator 108 employed in this embodiment is of a cylinder type (cylindrical type). Inflators that are currently popular are types that are filled with a gas generating agent and burn it to generate gas, types that are filled with compressed gas and supply gas without generating heat, and There are types including both a gas generating agent and a compressed gas. Any type of inflator 108 can be used.

  FIG. 2 is a schematic cross-sectional view illustrating the expansion and deployment of the cushion member 102 of FIG. In the state of FIG. 1A and FIG. 2A, when a side collision or rollover (rollover) occurs in the vehicle 106, a sensor (not shown) provided in the vehicle 106 first detects an impact, Due to this, a signal is transmitted to the inflator 108. By receiving this signal, the inflator 108 is activated, and gas is supplied to the cushion member 102. When the cushion member 102 receives the gas from the inflator 108, as illustrated in FIGS. 1B and 2B to 2D, the cushion member 102 pushes away a roof trim (not shown) to the side wall of the vehicle body (FIG. 1A). The side window 110 and the like are inflated and deployed downward to protect the occupant.

  The cushion member 102 is for a curtain airbag, and has a large shape that can spread along the side surface of the vehicle body by pushing the roof trim. The cushion member 102 is formed into a bag shape by overlapping two base fabrics constituting the surface thereof, sewing and bonding, or spinning using OPW (One-Piece Woven).

  The expansion region of the cushion member 102 is partitioned into a plurality of small rooms (chambers) in consideration of the position where the occupant can come into contact. For example, chambers 114, 116 and the like are provided on the front side of the vehicle for the purpose of receiving passengers in the front seat 112. Further, on the rear side of the vehicle, a chamber 120 and the like are provided on the side of the rear seat 118.

  A plurality of attachment tabs 128 are provided on the upper edge 126 of the cushion member 102 as attachment parts to the vehicle body. The attachment tab 128 has a belt shape and is attached to the roof side rail 104 using a bolt or the like. A string-like strap 130 is provided at the front end of the cushion member 102. The strap 130 is a member that connects the cushion member 102 to the front pillar 105, suppresses the swinging of the cushion member 102 during expansion and deployment, stabilizes the deployment behavior, and additionally applies tension to the cushion member 102 in the vehicle longitudinal direction. Has the function of giving.

  In the present embodiment, the inflator 108 is located above the center pillar 107. In the vicinity of the inflator 108, a protector 140 and a bracket member 150 (see FIG. 3 and the like), which will be described later, are provided for fixing the inflator 108 and causing the cushion member 102 to expand and deploy in the target direction. It is attached. Hereinafter, the configuration of the protector, the bracket member 150 and the like will be described in detail.

  FIG. 3 is a partially enlarged view of the airbag 100 illustrated in FIG. FIG. 3A to FIG. 3D are perspective views illustrating states in which the airbag 100 is observed from the passenger compartment side, and FIG. 3E to FIG. It is the perspective view which illustrated the state observed from the outside. 4 is a cross-sectional view taken along line AA in FIG.

  As illustrated in FIG. 3A, the mounting tab 128 and the bracket member 150 that fixes the cushion member 102 to the vehicle body are attached to the outer surface of the cushion member 102 via the mounting tab 128. Furthermore, as a feature of the airbag 100 of the present embodiment, a wrapping member 160 is attached to the cushion member 102 as illustrated in FIGS. 3 (a) and 3 (b).

  The winding member 160 is a member wound around the cushion member 102 in the storage form together with the protector 140 described later. As illustrated in FIG. 3E, in the present embodiment, the winding member 160 has one end 160 a attached to the edge of the cushion member 102 in the longitudinal direction. The winding member 160 has a long shape extending downward from the one end 160a. The winding member 160 is provided with a first engagement hole 162 and a second engagement hole 164 which are engaged with a protrusion 142 described later, with a gap therebetween. In this embodiment, the case where the 1st engagement hole 162 and the 2nd engagement hole 164 were provided in the vicinity of the both ends of the winding member 160 is illustrated.

  In this embodiment, the winding member 160 is attached to the cushion member 102 by sewing. Thereby, the winding member 160 can be attached to the cushion member 102 easily and firmly. However, the wrapping member 160 around the cushion member 102 is not limited to sewing, and does not exclude other methods. Further, as illustrated in FIG. 3A, the winding member 160 is provided with a fragile portion 166 that is broken when the cushion member 102 is inflated and deployed. Thereby, the winding member 160 is reliably broken at the fragile portion 166 when the cushion member 102 is inflated and deployed. Accordingly, the cushion member 102 can be rapidly inflated and deployed.

  As illustrated in FIG. 3C and FIG. 3F, a protector 140 is disposed on the vehicle exterior side of the cushion member 102 in the storage form. The protector 140 can stabilize the deployment direction when the cushion member 102 is inflated and deployed. In addition, the cushion member 102 can be prevented from being twisted. In the present embodiment, the protector 140 has a substantially L shape that covers the upper side of the cushion member 102 and the side wall side of the vehicle body. However, the shape of the protector 140 of this embodiment is only an example, and is not limited to this. The protector 140 may have a shape different from the shape exemplified in the present embodiment as long as the protector 140 has a shape that covers at least the side wall of the vehicle body on the outer peripheral surface of the cushion member 102 in the storage form.

  As a feature of the present embodiment, as illustrated in FIG. 3F, the outer peripheral surface 140a of the protector 140 is provided with a protruding portion 142 that protrudes from the outer peripheral surface 140a. In particular, in the present embodiment, a configuration in which a protruding portion 142 that protrudes from the outer peripheral surface 140a is provided in the vicinity of the edge portion 140b that extends in the same direction as the longitudinal direction of the cushion member 102 in the storage mode is illustrated. Thereby, in the vicinity of the edge portion 140b in the longitudinal direction of the protector 140, the winding member 160 folded back can be fixed. Further, by providing the protrusion 142 near the longitudinal edge 140b of the protector 140, the length of the winding member 160 can be shortened to the minimum.

  In particular, in the present embodiment, the protrusion 142 is formed in the vicinity of the edge 140b of the outer peripheral surface 140a of the protector 140 on the side close to the attachment position of the winding member 160 in the cushion member 102. However, the position of the protrusion 142 shown in FIG. 3F is merely an example, and the protrusion 142 may be formed in the vicinity of the opposite edge.

  When the protector 140 is fixed to the cushion member 102, first, as illustrated in FIGS. 3C and 3F, the winding member 160 having one end 160a attached to the cushion member 102 and extending therefrom is shown in FIG. As shown in (g), the protector 140 is folded back at the longitudinal edge 140b. Once folded, the first engagement hole 162 provided on one end of the winding member 160 is engaged with the protrusion 142.

  When the first engagement hole 162 on the one end 160a side is engaged with the protrusion 142, the winding member 160 is moved along the outer peripheral surface 140a of the protector 140 as illustrated in FIG. Pull toward the edge on the side where the protrusion 142 is not provided. Thereafter, the wrapping member 160 is wound at least once around the protector 140 and the cushion member 102 of the storage form set in the protector 140, and the second engagement hole 164 at the other end is wound around the protruding portion 142 in the wound state. Engage. Thereby, the airbag 100 will be in the state illustrated in FIG.3 (i) and FIG.

  As described above, according to the airbag 100 of the present embodiment, the first engagement hole 162 and the second engagement hole 164 provided in the winding member 160 and the outer peripheral surface 140a of the protector 140 are provided. The protruding position 142 can accurately determine the winding position of the winding member 160 when the cushion member 102 and the protector 140 are fixed. Thereby, the dispersion | variation in the winding position of the winding member 160 can be prevented, and it becomes possible to manage correctly the diameter of the cushion member 102 used as the accommodation form. Further, when winding the winding member 160, the operator can know the winding position of the winding member 160 by the protruding portion 142. Therefore, the winding member 160 can be easily wound around the cushion member 102 simply by engaging the first engagement hole 162 and the second engagement hole 164 with the protrusion 142. Therefore, it is possible to improve work efficiency.

  In the present embodiment, the winding member 160 is rotated once as described above, but the length of the winding member 160 is further increased, the number of engagement holes that engage with the protrusion 142 is increased, and the winding member 160 is rotated twice. As described above, three or more engagement holes may be engaged with the protrusion 142.

  FIG. 5 is a diagram illustrating a modification of the airbag 100 illustrated in FIG. 3. 5A to 5E correspond to FIGS. 3E to 3I, respectively. Here, FIG. 3 illustrates the configuration in which the protrusion 142 is provided in the vicinity of the edge 140b in the longitudinal direction of the protector 140, but the present invention is not limited to this. As shown in FIGS. 5A to 5E, the protrusion 142 may be disposed at a position away from the vicinity of the edge 140 b in the longitudinal direction of the protector 140.

  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 by various methods. 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.

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

  DESCRIPTION OF SYMBOLS 100 ... Air bag, 102 ... Cushion member, 104 ... Roof side rail, 105 ... Front pillar, 106 ... Vehicle, 107 ... Center pillar, 108 ... Inflator, 110 ... Side window, 112 ... Front seat, 114 ... Chamber, 116 ... Chamber, 118 ... Rear seat, 120 ... Chamber, 126 ... Upper edge, 128 ... Mounting tab, 130 ... Strap, 140 ... Protector, 140a ... Outer surface, 140b ... Edge, 142 ... Projection, 150 ... Bracket member, 160 ... winding member, 160a ... one end, 162 ... first engagement hole, 164 ... second engagement hole, 166 ... weak part

Claims (4)

Cushion member that is configured in a bag shape, wound and folded, or is subjected to both of them and becomes a slender storage form in the vehicle front-rear direction and mounted on the side wall of the vehicle body,
A protector for covering at least the vehicle body side wall of the cushion member in the storage configuration;
A protrusion protruding from the outer peripheral surface of the protector;
A winding member wound around the cushion member in the storage form together with the protector, and a winding member with one end attached to the cushion member;
A first engagement hole and a second engagement hole which are provided at an interval in the winding member and engage with the protrusion;
With
The winding member extends from the one end, is folded back at a longitudinal edge of the protector, and engages the first engagement hole with the protruding portion and is set on the protector and the protector. A curtain airbag device, wherein the second engaging hole is engaged with the protruding portion in a state where the periphery of the cushion member in the storage form is wound at least once.   The curtain airbag device according to claim 1, wherein the winding member is provided with a fragile portion that is broken when the cushion member is inflated and deployed.   The curtain airbag device according to claim 1, wherein the winding member is attached to the cushion member by sewing.   4. The curtain airbag device according to claim 1, wherein the protruding portion is provided in the vicinity of an edge portion in a longitudinal direction of the protector. 5.

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