JP2013173403A - Airbag device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively control effect to a mounting piece part by impact force at deployment of an airbag, even though achieving cost reduction by decreasing the number of parts and the number of working processes in manufacturing.SOLUTION: An airbag device is configured to mount an airbag formed by projecting a mounting piece part 40 to an airbag body part to a vehicle body by a vehicle body mounting member 50. In the mounting piece part 40, a slit 41 for inserting a portion of the vehicle body mounting member 50 is established in base cloth that composes the mounting piece part 40, and a receiving means 46 for receiving power to an edge end part 44 side is provided insertably of the vehicle body mounting member 50 in the slit 41 in a part containing the edge end part 44 side in a direction moving away from the airbag body to the slit 41. A receiving means 46 is at least fixed to a base cloth of an attaching piece part 40 in both ends 41a neighborhood of the slit.

Description

  The present invention relates to an airbag apparatus configured to attach an airbag to a vehicle body by a vehicle body attachment member such as a bracket.

  Airbag devices are widely used today as a means for absorbing and mitigating shocks to passengers in vehicle collisions. As such an airbag device, various devices are used depending on the arrangement location in the vehicle, and for example, there is a so-called curtain airbag device that deploys an airbag along a window portion on the side of the vehicle.

  The curtain airbag device is normally folded long and is stored along the roof side portion on the upper side of the window portion on the side surface of the passenger compartment. The airbag that constitutes the curtain airbag device has ears (mounting pieces) projecting at a plurality of locations on the upper edge of the airbag body. For example, a metal bracket (vehicle body mounting member) and screws are provided. Used to attach to the roof side. When the vehicle is subjected to an impact such as a side collision, gas is supplied from the inflator to the airbag body, and the airbag body is inflated and deployed downward flat along the window on the vehicle side. It is designed to protect the head and so on.

  Such a curtain airbag device is attached to the vehicle body using a bracket made of metal or the like. The bracket is attached to the airbag main body by an attachment piece protruding from the upper edge of the airbag main body.

  When mounting using a rivet 80 as shown in FIG. 10A as a mounting structure for mounting the bracket to the mounting piece, a round hole 81 for rivet is opened in the mounting piece, and this round hole 81 for rivet is provided. The bracket is fixed to the mounting piece by fixing it through the rivet 80.

  In addition, by using a specially designed metal plate, the ear portion of the airbag device is sandwiched between the plates and fixed to the vehicle body with a small number of parts (for example, see Patent Document 1). .

  In addition, by using a specially designed component, the ear part of the airbag device is fixed to the vehicle body with a plate having a cross-shaped opening and a cross-shaped fixing tool, so that the torque action due to rotation by bolt tightening can be achieved. There is one that does not cause kinking (see, for example, Patent Document 2).

JP 2000-142302 A Special table 2011-527255 gazette

However, when the bracket is attached to the attachment piece using the rivet 80 as shown in FIG. 10 (a) described above, parts of the rivet 80 are required for attachment, and when manufacturing the airbag device, An operation process for stopping and fixing the rivet 80 with a rivet tool is required.
From the viewpoint of cost reduction in an airbag device and weight reduction as an in-vehicle component, it is required to rationalize by reducing the number of components and the number of work processes as much as possible.

  Here, as shown in FIG. 10B, if a slit is provided in the attachment piece and only a part of the plate-like bracket is hooked through the slit, rivets can be made unnecessary as the number of parts. At the same time, it is possible to eliminate the work process of stopping and fixing the rivet when manufacturing the airbag device.

  However, when the vehicle receives an impact, gas is supplied to the airbag main body, and when the vehicle is inflated and deployed, the airbag rapidly deploys. Therefore, the mounting piece for attaching the airbag main body to the vehicle body is very large. Impact force F is applied.

  As shown in FIG. 10B, the impact force F acts in a direction in which the airbag main body is pulled away from the vehicle body, that is, in a direction in which the bracket is moved in the direction of the edge with respect to the mounting piece. For this reason, when the airbag is deployed, the bracket moves in the direction of the edge of the mounting piece while the edge of the plate-like bracket is hooked on the slit end of the mounting piece. There is a problem that the load tends to concentrate between the edge portion of the bracket and the end portion of the slit.

  Here, even if the number of the base fabrics to be stacked is increased to increase the strength of the mounting piece, a slit will be provided in each of the stacked base fabrics, and the brackets will be attached at the cut surfaces of the base fabrics in the respective slits. I will take it. For this reason, other countermeasures that are not simply the number of sheets are required.

In addition, as in Patent Document 1 described above, when the number of parts is reduced by using a dedicated part for the metal bracket, the manufacturing process of the dedicated metal part and the manufacturing process of bending the metal part also increase the cost. There was a fear.
Moreover, in patent document 2 mentioned above, the number of parts increased by the exclusive parts, and it was not considered even about cost reduction.

  The present invention has been made in view of such a situation, and while reducing costs by reducing the number of parts and the number of work steps at the time of manufacture, the influence on the mounting piece portion due to the impact force at the time of airbag deployment An object of the present invention is to provide an airbag device that can effectively suppress the problem.

In order to achieve such an object, an airbag apparatus according to the present invention is an airbag apparatus having a configuration in which an airbag having an attachment piece projectingly provided on an airbag main body is attached to a vehicle body by a vehicle body attachment member.
The attachment piece portion includes a slit for inserting a part of the vehicle body attachment member formed in a base fabric constituting the attachment piece portion, and a portion including an edge portion side in a direction away from the airbag main body portion with respect to the slit. In addition, a receiving means for receiving the force toward the edge is provided so that the vehicle body mounting member can be inserted into the slit,
The receiving means is characterized in that it is fixed to the base cloth of the mounting piece at least near both ends of the slit.

  As described above, according to the present invention, the number of parts and the number of work processes at the time of manufacturing are reduced, and the effect on the mounting piece due to the impact force at the time of airbag deployment is effectively suppressed while realizing cost reduction. can do.

It is a figure which shows the structural example around the airbag apparatus as embodiment of this invention. (A) The expansion perspective view which shows the inside of the code | symbol X of FIG. 1, (b) The expansion perspective view around the attachment piece part 40 of an airbag deployment state. FIG. 6 is an exploded perspective view showing a state in which a bracket 50 is removed from the attachment piece 40. It is (a) front view which shows the attachment piece part 40 roughly, (b) A-A 'sectional drawing. It is a figure explaining the effect | action of the valley fold part 46 at the time of airbag deployment. It is a figure which shows the other structural example by the bending method of the base fabric in the attachment piece part. It is a figure which shows the other structural example of the attachment piece part 40 which makes the folding part 45 the attachment piece base part 43 separately. It is a figure which shows the other structural example of the slit 41 in the attachment piece part. It is a figure which shows the other structural example of the sewing part 42 for slits in the attachment piece part. It is a figure explaining the conventional structure.

  Next, an embodiment in which an airbag device according to the present invention is applied to a curtain airbag device will be described in detail with reference to the drawings.

  An airbag device 2 shown in FIG. 1 includes an airbag 1 and is disposed on a roof side portion 5 as a mounted portion in a compartment 4 of a vehicle body 3 of an automobile that is a vehicle. The airbag 1 is also called a curtain airbag, a side-impact airbag, an inflatable curtain, or a head protection airbag, and has a planar shape on the side of the occupant when subjected to an impact such as a side collision. It is designed to protect the occupant who is the object to be protected.

  Hereinafter, as shown in FIG. 1, the straight direction is the forward direction, the opposite direction is the rear direction, the opposite direction is the rear direction, the vehicle outer side in the vehicle width direction is the outer direction, and the vehicle inner side is the inner direction, as shown in FIG. The description will be made assuming that the direction of gravity is the vertical direction.

  The vehicle body 3 shown in FIG. 1 shows an example in which a front seat and a rear seat on which a passenger can be seated are provided in a passenger compartment 4. The vehicle body 3 is provided with doors (not shown) provided with windows (side windows) 8 that form predetermined surfaces that can be opened at the upper portions corresponding to the front seat and the rear seat, respectively. The airbag 1 is deployed along the surface on the passenger compartment 4 side.

  A front pillar 11, a center pillar 12, and a rear pillar 13 are provided on both sides of the passenger compartment 4 in order from the front side. A vehicle body panel 15 constituting a member to be attached, which is also called a roof side rail, is provided above the pillars 11, 12, and 13, and a ceiling panel (not shown) is supported through the vehicle body panel 15.

  Further, a pillar garnish as an interior material is attached to the entire length of each pillar 11, 12, 13 or a part of the compartment 4, and the pillars 11, 12, 13 are covered. The pillar garnish that covers the pillars 11 and 13 constitutes a covering member of the airbag device 2.

  The airbag device 2 is a so-called front / rear seat airbag that can protect passengers in the front and rear seats. The airbag device 2 is folded and stored in the roof side portion 5 surrounded by the vehicle body panel 15 and the like, and the rear An inflator 25 which is a gas generator that is stored behind or above the seat and supplies gas to the airbag 1, a tether belt 36 connected to the front end of the airbag 1, and the airbag 1 is connected to the roof side portion 5 of the vehicle body 3. The bracket 50 and the long bracket 20 which are vehicle body attachment members for attachment to the tape, the tape 60 as temporary fixing means, and the like are configured.

  As shown in FIGS. 1 to 3, the airbag 1 is a combination of one or a plurality of base fabrics. For example, one base fabric is folded, or two base fabrics are overlapped and the outer peripheral portion is joined with a thread. The airbag main body portion 30 is formed in a flat bag shape, and the mounting piece portions 40 are provided at a plurality of locations on the upper edge of the airbag main body portion 30.

  With such a configuration, the airbag device 2 is a tape in a state in which the airbag body 30 is elongated in a longitudinal direction with a predetermined folding method and the bracket 50 and the long bracket 20 are attached to the attachment piece 40. 60 is wound around a plurality of places, is folded into an elongated shape, and is stored in the roof side portion 5. 2 shows a configuration in which the bracket 50 is attached to the attachment piece 40, the configuration in which the long bracket 20 is attached to the attachment piece 40 may be the same as the configuration in which the bracket 50 is attached.

  Although not shown, the airbag main body 30 overlaps an outer base fabric portion disposed on the outer side which is the vehicle body side and an inner base fabric portion disposed on the passenger compartment side, and the main body sewing portion 32 in the vicinity of the outer periphery. Are sewn together at a predetermined sewing portion. The airbag main body 30 has a bag-like inflatable portion 31 in which the inside of the main body sewing portion 32 is inflated and deployed by the inflow of gas.

  Although not shown, the airbag main body 30 is located at the upper rear end of the airbag main body 30 and has a gas inlet that communicates the inflatable portion 31 to the outside. A non-inflatable part and the like are provided. Further, the inflatable portion 31 is a hollow air chamber, and a communication portion located at the upper portion of the longitudinal central portion, which is the front-rear direction of the airbag body portion 30, and a first communicating with the front side of the communication portion. A front seat protection part (front seat protection area) as an inflating part, and a rear seat protection part (rear seat protection area) as a second inflating part communicating with the rear side of the communication part. The sewing portion includes a main body sewing portion 32 that is an outer periphery connecting portion that sews the outer periphery of the expansion portion, and a restriction portion that restricts the width dimension when each protection portion is deployed. And this control part is located in one place or several places of an expansion part, and is formed in the outer periphery main part sewing part 32 integrally or separately. Further, for example, an annular protection portion is formed at the terminal portion of the restriction portion. Furthermore, between the outer base fabric portion and the inner base fabric portion, as necessary, as a means for guiding the gas, or as a means for regulating the width dimension of the expansion portion during deployment, an inner pipe, a front partition wall body, Alternatively, a rear partition wall or the like is attached by sewing or the like.

  Further, a tether belt 36 is attached in the vicinity of the front end side attachment portion 37 for attaching the front end of the airbag 1 to a component of the vehicle body 3. The tether belt 36 is also called a tension strap or the like, and is a string-like member that connects the front end portion of the airbag main body 30 and the vicinity of the front end portion of the front pillar 11. A metal fitting 35 for attaching to the front pillar 11 or a component of the vehicle body 3 is attached to the tip of the tether belt 36.

  A connecting pipe 27 extending from the inflator 25 is connected to a gas inlet near the rear end side attachment portion 38 for attaching the rear end of the airbag 1 to a component of the vehicle body 3. The inflator 25 and the connecting pipe 27 are provided with an inflator side attaching portion 26 for attaching to the rear pillar 13 or the components of the vehicle body 3.

  A plurality of attachment pieces 40 of the airbag 1 are provided at predetermined positions on the upper edge of the airbag body 30. In the configuration example of FIG. 1, as a configuration example for attaching the airbag 1 to the roof side portion 5 of the vehicle body 3, three brackets 50 provided for one attachment piece portion 40 and two attachment piece portions are provided. An example in which one long bracket 20 provided for one 40 is used is shown, and five attachment piece portions 40 are projected upward.

  The long bracket 20 includes two attachment portions 21 attached to the attachment piece portion 40 and two fixing holes 22 for attachment to the components of the vehicle body 3. It comes to hold from.

  As shown in FIG. 3, the bracket 50 is provided with a main body pressing portion 51, a mounting portion 52 provided in an L-shape at an angle of approximately 90 degrees on the main body pressing portion 51, and a protruding portion provided on the mounting portion 52. And a hooking portion 53. A bracket 50 is fixed to the roof side portion 5, which is a mounted portion of the vehicle body 3, with a bolt or the like through a hole 54 formed in the mounting portion 52. The hook portion 53 is used for temporarily hooking in order to improve workability at the time of attachment of the long airbag device 2.

Below, the structure by which the bracket 50 is attached to the attachment piece part 40 shown with the code | symbol X in FIG. 1 is demonstrated. FIG. 2A shows an enlarged perspective view of a portion indicated by reference numeral X in FIG. 1, and FIG. 2B shows an enlarged perspective view around the mounting piece portion 40 in the airbag deployed state. FIG. 3 is an exploded perspective view showing a state where the bracket 50 is removed from FIG.
The attachment method of the bracket 50 or the long bracket 20 to each of the attachment piece portions 40 may be the same or different depending on the product specifications.

  Each attachment piece 40 projecting from the upper edge of the airbag main body 30 is formed by folding a predetermined number of strip-shaped base fabrics and bending the outer base fabric portion, which is a base fabric constituting the airbag main body 30. The inner base fabric portion is further overlapped on the outer side and is sewn by the attaching piece sewing portion 48, and is sewn and integrated with the airbag main body portion 30. The number of base fabrics constituting the attachment piece 40 may be an arbitrary number of one or more, but in the configuration example shown in FIGS. 2 to 4, three strip-like base fabrics of the same size are used as the attachment piece 40. An example of overlapping is shown.

  The attachment piece portion 40 is configured by connecting a folding portion 45 via an edge portion 44 between an attachment piece base portion 43a on the front side as viewed from the passenger compartment 4 and an attachment piece base portion 43b on the back side. That is, the front-side mounting piece base 43a and the folding portion 45 are continuous through the edge portion 44a that is a front-side fold line when viewed from the vehicle compartment 4, and the folding portion 45 is the back side when viewed from the vehicle compartment 4. The attachment piece 40 is configured so as to be continuous with the attachment piece base 43b on the back side through the edge portion 44b which is a fold line.

  The folding portion 45 is configured by being folded at a valley fold portion 46 that is a valley fold line with the airbag main body portion 30 side as a downward direction, and between the front-side attachment piece base portion 43a and the back-side attachment piece base portion 43b. And it arrange | positions so that it may connect via the edge part 44 (44a, 44b) of a back side. For this reason, the folding part 45 is arrange | positioned so that it may be folded in M shape between the attachment piece base part 43a on the front side, and the attachment piece base part 43b on the back side.

  A slit 41 for inserting the mounting portion 52 and the hooking portion 53 of the bracket 50 is cut into the mounting piece base portion 43a on the front side and the mounting piece base portion 43b on the back side as viewed from the vehicle compartment 4 in the mounting piece portion 40. Will be opened. At both ends of the slit 41, a slit end portion 41a of a round hole is opened in order to alleviate the impact force at the time of deploying the airbag from being concentrated on one point and improve the opening of the slit.

  The periphery of the slit 41 including the slit end portion 41 a which is a round hole at both ends is sewn by a slit sewing portion 42 so as to surround the slit 41. By the sewing at the slit sewing portion 42, the folding portion 45 that is folded in an M-shape is joined to the front side mounting piece base portion 43a and the back side mounting piece base portion 43b.

FIG. 4 shows a schematic (a) front view and (b) AA ′ sectional view of the mounting piece 40.
As shown in FIG. 4, the uppermost base fabric in the edge portion 44 that is the fold of the mounting piece base portion 43 from the upper edge portion of the slit 41 with respect to the mounting piece portion 40 in which a predetermined number of base fabrics are folded and folded. The length in the vertical direction from the fold of the uppermost base fabric at the edge 44 to the fold of the lowermost base fabric at the valley fold 46 of the fold 45 is defined as “l”. Let m be “m”.

The length of “l” and “m” shown in FIG. 4 is the lowest position in the range where the valley fold 46 does not touch the opening except for both ends of the slit 41, that is, “ Most preferably, the lengths of l "and" m "are equal.
The folding portion 45 formed by being bent in this manner is sandwiched between the attachment piece base portions 43 and is sewn by the slit sewing portion 42, whereby the longitudinal extension line of the slit 41 and the slit sewing portion 42 are obtained. The trough fold 46 in the fold 45 is sewn and fixed to the attachment piece base 43 at the sewing end 42a, which is a portion where the

  When the inflating portion 31 in the airbag main body 30 is inflated and deployed by the gas from the inflator 25 due to the occurrence of a collision with the car body 3 or the like, as shown in FIG. Thus, the impact force F acts so that the attachment piece 40 is pulled downward.

Due to the impact force F, the bracket 50 tends to move toward the edge portion 44 with respect to the mounting piece 40, and the impact force F to move the bracket 50 causes the mounting piece base 43 on the front side and the back side. In addition to the slit 41, the slit sewing portion 42 receives it by the valley folding portion 46 of the folding portion 45 fixed to the attachment piece base portions 43 a and 43 b on the front side and the back side.
That is, since the valley fold 46 of the folding portion 45 dams the movement of the bracket 50 and receives the load due to the impact force F, the load due to the impact force F is applied to the edge of the bracket 50 as described above with reference to FIG. There is no concentration between the portion 52a and the slit end 41a.

The slit 41 receives the impact force F at the cut surface of the base fabric constituting the attachment piece base portion 43, but the valley fold portion 46 of the folding portion 45 receives the impact force F on the surface of the base fabric. For this reason, the load applied to the cut end portion of the base fabric by the impact force F can be greatly reduced.
For this reason, the influence with respect to the attachment piece part 40 can be effectively suppressed also with respect to the impact force F at the time of airbag deployment.

  In particular, if the length of “m” shown in FIG. 4 is the same as “l”, the valley fold 46 is fixed to the attachment piece base 43 at the position of the sewing end 42a. For this reason, even when the airbag is deployed, the rate at which the impact force F due to deployment is received by the valley folds 46 is increased, and the rate at which the slit 41 is received by that amount can be made very small. For this reason, the influence of the impact force F with respect to the attachment piece part 40 can be made very small.

Note that the length of “m” shown in FIG. 4 is not limited to the same as “l”, and if it is shorter than “l” (m <l), the valley folds in all the stacked base fabrics 46 fold lines should just be arrange | positioned at least to the slit 41 side rather than the sewing part 42 for slits.
In addition, when the length of “m” shown in FIG. 4 is longer than “l” (m> l), the folding portion 45 comes out at the opening of the slit 41. From the slit 41 in this state, As long as the mounting portion 52 and the hooking portion 53 of the bracket 50 can be inserted, the length of “m” may be longer than “l”.
In other words, the vertical position of the valley fold 46 at the lower end of the fold 45 is such that the mounting portion 52 and the hook 53 of the bracket 50 can be inserted into the slit 41, and the valley folds in all the stacked base fabrics 46 fold lines may be disposed between the upper slit sewing portion 42 and the lower slit sewing portion 42.

More preferably, the length of “m” shown in FIG. 4 is the same as or slightly shorter than “l” (m ≦ l), and the valley fold 46 is arranged within the range of the round hole of the slit end 41a in the vertical direction. It is preferable.
Also by the folding part 45 formed by being bent in this way, the valley fold part 46 of the folding part 45 sandwiched between the attachment piece base parts 43 is sewn in the vicinity of the sewing end part 42 a and fixed to the attachment piece base part 43. . For this reason, even when the airbag is deployed, the rate at which the impact force F due to deployment is received by the slit 41 is reduced, and the rate at which the impact is received by the valley fold 46 is increased. For this reason, the load applied to the cut end portion of the base fabric by the impact force F can be greatly reduced, and the influence of the impact force F on the attachment piece 40 can be effectively suppressed.

  The mounting piece 40 is configured as described above. When the airbag 1 is folded, the provisional piece 40 is temporarily inserted into the slit 41 of the mounting piece 40 as shown in FIG. The airbag 1 and the mounting piece 40 are temporarily fixed together by a tape 60 for fastening so as to be tied from the outside.

As described above, according to the above-described embodiment, the impact force F due to deployment can be received by the valley fold portion 46 in the folding portion 45 even when the airbag is deployed. That is, it is possible to receive the impact force F due to the development on the surface of the base fabric that is not cut, not the cut surface of the base fabric.
For this reason, although it is the structure which provides the slit 41 in the attachment piece part 40 and attaches the bracket 50, a load does not concentrate on the slit edge part 41a which is the cut surface edge part of a base fabric. For this reason, the influence to the attachment piece part 40 by the impact force F at the time of airbag deployment can be suppressed effectively.

In addition, in the mounting piece portion 40 of the above-described embodiment, a predetermined number of base fabrics of the same size are stacked and bent, and the vicinity of the end portion on the side far from the airbag main body portion is further bent inward into an M shape and sewn. The receiving means for receiving the impact force F when the airbag is deployed can be formed with a simple effort.
For this reason, as a countermeasure against the impact force F when the airbag is deployed, the impact on the mounting piece portion 40 can be achieved without increasing the number of parts using other parts or greatly increasing the number of work steps during manufacturing. The influence by the force F can be effectively suppressed.

  Moreover, according to embodiment mentioned above, since the intensity | strength of the attachment piece part 40 with respect to the impact force F at the time of airbag deployment can be improved, it is also possible to select a cheaper fabric as a base fabric constituting the attachment piece part 40. It becomes possible. For this reason, the cost can be further reduced.

  Each of the above-described embodiments is a preferred embodiment of the present invention, and the present invention is not limited to this, and various modifications can be made based on the technical idea of the present invention.

  For example, in the above-described embodiment, it has been described that the overlapping base fabric is bent in the same manner to form the attachment piece 40. However, as shown in FIG. The folded portion 45 may be formed by bending in an M shape, and the other base fabric may be folded only at the edge portion 44.

  Further, when forming the folded portion 45 by folding the base fabric, as shown in FIG. 6 (b), a plurality of folded portions 45 and valley folded portions 46 are formed by further repeating mountain folding and valley folding. Also good. Naturally, the strength of the attachment piece part 40 with respect to the impact force F at the time of airbag deployment can be raised, so that the number of the folding parts 45 and the valley fold parts 46 is increased.

  Moreover, as shown in FIG.6 (c), the attachment piece base part 43a on the front side and the attachment piece base part 43b on the back side may be comprised with another cloth. In this case, either or both of the attachment piece base portions 43a and 43b are bent at the edge portion 44, and further, the base fabric is bent at the valley fold portion 46, and is sewn at the slit sewing portion 42. It can be made to function similarly to the folding part 45 and the valley folding part 46. FIG.

  Further, when the attachment piece base portions 43 a and 43 b are separate fabrics, the attachment piece portion 40 may be integrally formed by a base fabric constituting the airbag main body portion 30. That is, even if the airbag main body 30 is cut so that a part of the airbag main body 30 protrudes upward from the upper edge, and the protruding portion serves as the attachment piece 40, the present invention can be similarly realized. .

  Further, as shown in FIG. 7, the folding portion 45 may be configured separately from the attachment piece base portion 43. In this case, for example, as shown in FIG. 7 (a), a separate cloth folded at the valley fold 46 is sandwiched between the attachment piece bases 43 folded at the edge 44 as a fold 45, and a slit sewing portion is obtained. By sewing at 42, it can function in the same manner as the folding part 45 and the valley folding part 46 in the above-described embodiment.

  Moreover, as shown in FIG.7 (b), it is good also as a structure which inserts | pinches between the folding part 45 by this separate cloth between the attachment piece base parts 43 by two or more. The strength of the mounting piece 40 against the impact force F when the airbag is deployed can be increased as the number of the folding portions 45 provided by being sandwiched in this way is increased.

Further, as shown in FIG. 7C, the folding portion 45 sandwiched between the attachment piece base portions 43 may be made of a material other than cloth, such as a thicker cloth or a resin piece such as an elastomer plate. Good. In this case, the material lower end 45a of the separate folding part 45 functions as the valley folding part 46 in the above-described embodiment.
When the folding part 45 is made of a material other than cloth, it is preferably a material that can be fixed to the attachment piece base part 43 by sewing or the like.

Further, in each of FIGS. 7A to 7C, as shown in FIG. 7D, the folding portion 45 provided as a separate body from the attachment piece base portion 43 has at least a slit sewing portion from the vicinity of the slit 41. As long as the size includes a portion up to 42, the size does not necessarily need to be from the edge portion 44 to the vicinity of the slit 41, and may be an arbitrary size.
Further, as described above, the attachment piece bases 43a and 43b may be separate fabrics.

Further, as shown in FIG. 8, the shape of the slit 41 is not limited to that shown in FIGS. 2 to 5 described above, and any shape can be used as long as the mounting portion 52 and the hooking portion 53 of the bracket 50 can be inserted. It may be.
For example, as shown in FIG. 8 (a), the slit 41 may have a shape other than a straight line, and as shown in FIG. 8 (b), the slit end 41a is not provided as a round hole. However, the present invention can be similarly applied.

Further, as shown in FIG. 9, the slit sewing portion 42 fixes at least the slit end portion 41a and the vicinity of the valley fold portion 46 of the folding portion 45 to the front and back attachment piece base portions 43a and 43b by sewing. If possible, the sewing line may be arbitrary.
For example, as shown to Fig.9 (a), the structure by which the sewing part 42 for slits is provided only in the both sides of the slit edge part 41a may be sufficient. Further, as shown in FIG. 9B, the slit sewing portion 42 may be provided only on the edge end 44 side including the sewing end portion 42 a with respect to the slit 41.
However, in order to improve the ease of insertion when the bracket 50 is inserted into the slit 41, it is preferable that a slit sewing portion 42 be provided in the vicinity of the slit 41.

  Moreover, if the folding part 45 can be fixed at a predetermined position between the front and back mounting piece base parts 43a and 43b, the means for fixing is not limited to sewing, and for example, fixed with an adhesive such as a bond. In addition, the present invention can be similarly realized.

  Further, not only the slit sewing portion 42 but also the sewing line and the sewing method of each sewing portion such as the main body sewing portion 32 and the attachment piece sewing portion 48 may be arbitrary.

  In the above-described embodiment, the configuration example in the case where the front seat and the rear seat are provided in the passenger compartment 4 has been described. However, the application target of the airbag device 2 is not limited to the vehicle body of this configuration example. The vehicle body 3 may have any configuration as long as the airbag 1 is attached to the vehicle body 3 using the portion 40 and the bracket 50. For example, a configuration such as a seven-seat seat in which two rear seats are provided in the passenger compartment 4 may be used, or a curtain airbag device may be provided for one door. The invention is equally applicable.

  The inflator 25 may be provided at any end of the airbag 1 as long as gas can be blown into the airbag main body 30, and is provided at a position other than the end such as near the center in the longitudinal direction. May be.

In the above-described embodiment, the example in which the airbag device of the present invention is applied to the curtain airbag device has been described. However, the application target of the present invention is not limited to the curtain airbag device, and the mounting piece portion and the above-described embodiment. The present invention can be similarly applied to various types of airbag devices as long as the airbag device is a type of mounting the airbag to the vehicle body using the mounting bracket corresponding to the bracket.
In other words, the airbag device is not limited to a curtain airbag, for example, a bumper, as long as the airbag device has a configuration in which a mounting piece projects from the airbag body and is fixed to the vehicle body by a mounting bracket attached to the mounting piece. The present invention can be similarly applied to airbags outside the vehicle such as airbags and hood airbags.

DESCRIPTION OF SYMBOLS 1 Air bag 2 Air bag apparatus 5 Roof side part (attachment part)
DESCRIPTION OF SYMBOLS 20 Long bracket 21 Attachment part 22 Fixing hole 30 Airbag main body part 31 Expansion part 32 Main body sewing part 40 Attachment piece part 41 Slit 41a Slit edge part 42 Slit sewing part 42a Sewing edge part 43 Attachment piece base part 44 Edge part 45 Folding part (receiving means)
46 Valley fold (receiving means)
47 Airbag body side end 48 Sewing part for mounting piece 50 Bracket (vehicle body mounting member)
51 Main body pressing portion 52 Mounting portion 52a Edge 53 Hooking portion 60 Tape

Claims (3)

An airbag device having a configuration in which an airbag having a mounting piece projecting from an airbag body is attached to a vehicle body by a vehicle body mounting member,
The attachment piece portion has a slit for inserting a part of the vehicle body attachment member formed in a base fabric constituting the attachment piece portion, and an edge portion in a direction away from the airbag main body portion with respect to the slit In the portion including the side, a receiving means for receiving the force toward the edge end side is provided so that the vehicle body mounting member can be inserted into the slit,
The airbag device according to claim 1, wherein the receiving means is fixed to a base fabric of the attachment piece at least in the vicinity of both ends of the slit.   2. The airbag device according to claim 1, wherein the receiving means is made of a cloth bent in a direction from the edge portion toward the slit.   The attachment piece portion includes two attachment piece base portions formed of the base cloth and having the slits formed therein, and the receiving means by the base cloth is connected between the two attachment piece base portions via a folding line. The airbag device according to claim 2, wherein the airbag device is configured.

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