JP2019026240A - Air bag device - Google Patents

Abstract

To provide an air bag device capable of achieving preferable insertion work property of an inflator into an air bag, even in a structure in which, the inflator is stored in the air bag, and suppressing leakage of expansion gas flowed to inside.SOLUTION: An inflator 30 comprises a main body part 31 and attachment means protruded to a shaft orthogonal direction side of the main body part. An air bag comprises an insertion opening part 49 for inserting an inflator thereinto. An area forming the insertion opening part is formed by laminating an outside panel material 46a and an inside panel material 51. The insertion opening part has an outside insertion slit 53 and an inside insertion slit 54 formed on an outside panel material and inside panel material respectively, and an open hole 55 for penetrating the outside panel material and inside panel material. The outside insertion slit and inside insertion slit are arranged in a non-crossing state and in a manner of not overlapping mutually.SELECTED DRAWING: Figure 9

Description

  The present invention relates to an airbag apparatus configured to include a bag-like airbag that is inflated by inflating an inflation gas therein, and an inflator that supplies the inflation gas to the airbag.

  Conventionally, as an airbag device, an inflator having a configuration in which an attaching means protrudes from the outer peripheral surface of a cylindrical main body is inserted into the inside of the airbag, and is attached to the outside of the airbag. There is a configuration in which the inflator and the airbag are attached to the body side by fixing the air bag to the body side (see, for example, Patent Document 1). In this conventional airbag device, the opening for inserting the inflator in the airbag is formed by stacking two panel materials, and the main body portion of the inflator can be inserted into each panel material from the end side. One slit extending along the direction perpendicular to the axis is formed, and this slit is arranged so as to intersect in a state where the panel members are stacked, and covers the slit from the outer peripheral side of the airbag. Thus, it was set as the structure which has arrange | positioned the cover cloth. And in the conventional airbag apparatus, the main body portion of the inflator is inserted into each airbag so as to be inserted into each slit from one end side, and the main body portion of the inflator is slit at the other end side. It was the structure accommodated in an airbag, making it protrude outside from.

JP 2017-81248 A

  However, in the conventional airbag device, since the slits are arranged so as to intersect with each other, if the length dimension of the slit is increased in consideration of insertion workability, the body surrounding the slit and the main body protruding from the slit Even if it is configured to cover the outer periphery with a cover cloth, it is possible to prevent the inflation gas flowing into the airbag from leaking from such a gap. It was difficult.

  This invention solves the above-mentioned subject, and provides the airbag apparatus which can suppress the leakage of the gas for the expansion | swelling which flowed in the inside even if it is the structure which accommodates an inflator in the inside of an airbag. Objective.

The airbag device according to the present invention is configured to include a bag-like airbag that is inflated by inflating an inflation gas therein, and an inflator that supplies the inflation gas to the airbag.
The inflator
A main body portion having an outer shape of a substantially columnar shape, and an attachment means that protrudes from the outer peripheral surface of the main body portion toward the axis orthogonal direction of the main body portion and is attached to the vehicle body side,
The airbag device is configured to be attached to the body side in a state in which the main body is inserted into the airbag so that the attachment means protrudes to the outside.
The airbag has an insertion opening for inserting the inflator therein;
The area constituting the insertion opening in the airbag has a two-layer structure in which an outer panel material and an inner panel material made of a flexible sheet body are laminated,
An insertion opening is formed in each of the outer panel member and the inner panel member so as to penetrate the outer panel member and the inner panel member. And an insertion hole for projecting the attachment means.
The outer insertion slit and the inner insertion slit are arranged in a non-intersecting state without overlapping each other.

  In the airbag device of the present invention, the opening for insertion has a two-layer structure in which an outer panel material and an inner panel material are laminated, and the outer opening material is formed on the outer panel material and the inner panel material, respectively. The slits and the inner insertion slits are arranged in a non-intersecting state without overlapping each other. That is, the area of the outer insertion slit formed in the outer panel material is covered by the inner panel material, and the area of the inner insertion slit formed in the inner panel material is covered by the outer panel material. The expansion gas that has flowed into the inside can be prevented from leaking outside through the outer insertion slit and the inner insertion slit.

  Therefore, in the airbag apparatus of the present invention, even if the inflator is configured to be housed inside the airbag, leakage of the inflation gas flowing into the interior can be suppressed.

  In the airbag device of the present invention, if the outer insertion slit and the inner insertion slit are arranged in a straight line so as to be substantially parallel to each other, the outer insertion slit and the inner insertion slit Compared with the case where the and are not parallel, the insertion workability of the main body of the inflator is good, which is preferable.

  Further, in the airbag device having the above-described configuration, the outer insertion slit and the inner insertion slit are formed substantially along the axial direction of the main body portion and are arranged so as to be displaced on the circumferential side of the main body portion. For example, when inserting the main body of the inflator into the airbag, the main body is moved so that the axial direction is substantially along the outer insertion slit and the inner insertion slit. Will be inserted into the slit. Therefore, even if the inflator is configured to include a mounting means projecting on the side perpendicular to the axis of the main body, this mounting means is less likely to interfere with the outer insertion slit and the peripheral portion of the inner insertion slit, The main body can be smoothly inserted into the airbag through the outer insertion slit and the inner insertion slit. That is, the main body part is moved to the axis orthogonal direction side in the insertion work of the main body part to the outer insertion slit and the inner insertion slit or the protrusion work from the insertion hole of the mounting means protruding from the main body part. Therefore, it is possible to simply carry out the insertion of the main body portion into the outer insertion slit and the inner insertion slit and the protrusion from the insertion hole of the attachment means. Therefore, the workability of inserting the inflator into the airbag is further improved, which is preferable.

Furthermore, in the airbag device having the above configuration, a flexible lid panel configured to be able to close the outer insertion slit on the outer peripheral side of the outer panel material is disposed in the insertion opening. ,
It is preferable that the lid panel has a configuration in which one end side is coupled to the outer panel material side, and an attachment hole for projecting the attachment means is disposed on the other end side corresponding to the insertion hole.

  If the airbag device is configured as described above, the outer peripheral side of the outer insertion slit can be covered with the lid panel, so that the inflation gas flowing into the airbag can be prevented from leaking from the outer insertion slit. Further, the leakage of the expansion gas can be further suppressed.

Furthermore, in the airbag device having the above-described configuration, the inflator is configured to cover the outer peripheral side of the main body with a cylindrical inner tube having flexibility and to be accommodated in the airbag.
Inner tube
A tube main body having an outlet for covering the outer peripheral side of the main body and allowing the inflation gas discharged from the main body to flow out;
A cover that is connected to the tube body at one end and extends from the tube body with the other end as a free end, and is configured to cover the inner insertion slit formed in the inner panel material from the inner peripheral side. And
It is preferable to have a configuration comprising:

  If the airbag device is configured as described above, the inflation gas discharged from the main body of the inflator flows into the airbag through the outlet of the tube main body, and is directed toward the inner insertion slit. It can suppress flowing into the. Further, the inner peripheral side of the inner insertion slit can be covered with a cover portion, and since this cover portion has the other end side as a free end, the inflating gas flowing into the inside of the airbag, It becomes a mode to be pressed against the inner peripheral surface side (the inner peripheral surface side of the inner panel material) of the inner insertion slit, and the inflation gas flowing into the airbag leaks to the outside through the inner insertion slit. This can prevent the expansion gas from leaking more accurately.

  Furthermore, in the airbag device having the above-described configuration, the outer insertion slit and the inner insertion slit are both disposed in one region extending from the insertion hole along the circumferential direction of the main body. For example, compared to the case where the outer insertion slit and the inner insertion slit are arranged on both sides with the insertion hole in between, the strength of the peripheral portion of the insertion hole in the airbag can be secured, which is preferable.

  Furthermore, in the case where the airbag device has such a configuration, if the inner insertion slit is formed at a position closer to the insertion hole side than the outer insertion slit, the inflator main body portion is Compared with the case where the inner insertion slit and the outer insertion slit are reversed when the insertion means is inserted through the insertion slit and the inner insertion slit and then the mounting means is projected from the insertion hole. Since the inflator mounting means inserted in the inner insertion slit is disposed in the vicinity of the insertion hole, the projecting work from the insertion hole of the mounting means after insertion into the inner insertion slit is easy. It is preferable.

Further, in the airbag device of the present invention, the insertion opening is configured to dispose a guide member serving as a guide when inserting the inflator between the outer panel member and the inner panel member,
The guide member is composed of a flexible sheet body, and one end side is overlapped with the inner peripheral side of the outer panel member at a portion between the outer insertion slit and the inner insertion slit. Thus, it is preferable that the region on the other end side is disposed so as to cover the inner peripheral side of the inner panel material so as to be coupled to the outer panel material and inserted through the inner insertion slit.

  If the airbag device is configured as described above, when the body portion of the inflator is inserted into the inside through the inner insertion slit, it is suppressed by the guide member from entering between the inner panel material and the outer panel material. Thus, the main body can be easily inserted into the airbag because it can be guided into the airbag.

Furthermore, in the airbag device having the above-described configuration, a structure in which a flexible lid panel configured to be able to close the outer insertion slit on the outer peripheral side of the outer panel material is disposed in the insertion opening. And
It is preferable that the lid panel has a configuration in which one end side is coupled to the outer panel material side, and an attachment hole for projecting the attachment means is disposed on the other end side corresponding to the insertion hole.

  If the airbag device is configured as described above, the outer peripheral side of the outer insertion slit can be covered with the lid panel, so that the inflation gas flowing into the airbag can be prevented from leaking from the outer insertion slit. Further, the leakage of the expansion gas can be further suppressed.

  Furthermore, in the airbag apparatus configured as described above, if the outer insertion slit and the inner insertion slit are arranged in a straight line so as to be substantially parallel to each other, the outer insertion slit and the inner insertion slit are arranged. Compared with the case where the slit is not parallel, the insertion workability of the main part of the inflator is good, which is preferable.

  Furthermore, in the airbag device having the above-described configuration, the outer insertion slit and the inner insertion slit are formed substantially along the axial direction of the main body portion and are arranged so as to be displaced on the circumferential side of the main body portion. For example, when inserting the main body into the airbag, the main body is moved so that the axial direction is substantially along the outer insertion slit and the inner insertion slit, and the outer insertion slit and the inner insertion slit are moved. Will be inserted. Therefore, even if the inflator is configured to include a mounting means projecting on the side perpendicular to the axis of the main body, this mounting means is less likely to interfere with the outer insertion slit and the peripheral portion of the inner insertion slit, The main body can be smoothly inserted into the airbag through the outer insertion slit and the inner insertion slit. That is, the main body part is moved to the axis orthogonal direction side in the insertion work of the main body part to the outer insertion slit and the inner insertion slit or the protrusion work from the insertion hole of the mounting means protruding from the main body part. Therefore, it is possible to simply carry out the insertion of the main body portion into the outer insertion slit and the inner insertion slit and the protrusion from the insertion hole of the attachment means. Therefore, the workability of inserting the inflator into the airbag is further improved, which is preferable.

  Furthermore, in the airbag apparatus having the above-described configuration, the lid panel may be configured such that one end side is disposed on the inner peripheral side of the outer panel member so that the outer insertion slit is inserted.

  Furthermore, in the airbag apparatus configured as described above, if the insertion hole is formed in a region between the outer insertion slit and the inner insertion slit, the airbag has the outer insertion slit and the inner insertion slit. Since the area between the slit and the body of the inflator is held by the body of the inflator, it is attached to the body side of the vehicle. Can be suppressed accurately, which is preferable.

  Furthermore, in the airbag device configured as described above, if the outer insertion slit and the inner insertion slit are both disposed in one region extending from the insertion hole along the circumferential direction of the main body, Compared with the case where the outer insertion slit and the inner insertion slit are arranged on both sides with the insertion hole in between, the strength of the peripheral portion of the insertion hole in the airbag can be secured, which is preferable.

It is a top view of the vehicle carrying the airbag apparatus for pedestrians which is one Embodiment of this invention. It is a schematic longitudinal cross-sectional view along the front-back direction of the airbag apparatus for pedestrians of embodiment. It is a general | schematic expanded longitudinal cross-sectional view along the front-back direction of the airbag apparatus for pedestrians of embodiment, and shows the site | part of an inflator. It is a schematic longitudinal cross-sectional view along the left-right direction which shows the site | part of an inflator in the airbag apparatus for pedestrians of embodiment. It is a top view of the state where the airbag used with the airbag device for pedestrians of an embodiment was developed flat. FIG. 6 is a bottom view showing a state where the airbag of FIG. 5 is flatly deployed. FIG. 7 is a cross-sectional view of a state where the airbag of FIG. 5 is inflated alone, corresponding to the VII-VII portion of FIG. 6. It is sectional drawing of the state which expanded the airbag of FIG. 5 alone, and respond | corresponds to the VIII-VIII site | part of FIG. FIG. 6 is a partially enlarged bottom view showing a portion of an insertion opening in the airbag of FIG. 5. FIG. 6 is a partial enlarged cross-sectional view showing a portion of an insertion opening and an inner tube in the airbag of FIG. 5. FIG. 6 is a schematic exploded perspective view showing a part of an insertion opening in the airbag of FIG. 5. FIG. 6 is a bottom view of the airbag of FIG. 5 in a state where an inner tube disposed inside the insertion opening is flatly deployed. It is a longitudinal cross-sectional view of the inner tube of FIG. FIG. 6 is a partially enlarged bottom view showing a part of an attachment piece in the airbag of FIG. 5. It is sectional drawing of the XV-XV site | part of FIG. It is sectional drawing of the XVI-XVI site | part of FIG. In the air bag device for pedestrians of an embodiment, it is a longitudinal section along the front-back direction of the state where the attachment piece part was attached to the case. In the air bag device for pedestrians of an embodiment, it is a longitudinal section along the horizontal direction of the state where the attachment piece part was attached to the case. It is the top view which arranged the base material which comprises the airbag of FIG. It is the top view which arranged the remaining base material which comprises the airbag of FIG. In the air bag device for pedestrians of an embodiment, it is an outline top view in the state where the air bag completed inflation. In the pedestrian airbag apparatus of an embodiment, it is a partial expansion outline longitudinal section showing the part near the inflator in the state where the airbag completed inflation. It is a schematic longitudinal cross-sectional view in the site | part of the attachment piece part in the state which the airbag completed the expansion | swelling in the airbag apparatus for pedestrians of embodiment. In the airbag of other embodiment of this invention, it is a partial expanded bottom view which shows the site | part of the opening part for insertion. In the airbag of FIG. 24, it is the elements on larger scale which show the site | part of the opening part for insertion, and an inner tube. FIG. 25 is a schematic exploded perspective view showing a portion of the insertion opening in the airbag of FIG. 24. In the airbag of other embodiment of this invention, it is the elements on larger scale which show the site | part of the opening part for insertion, and an inner tube. In the airbag of other embodiment of this invention, it is the elements on larger scale which show the site | part of the opening part for insertion, and an inner tube. In the airbag of other embodiment of this invention, it is a partial expanded bottom view which shows the site | part of the opening part for insertion.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the embodiment, a pedestrian airbag device M disposed near the rear end 15c of the hood panel 15 in the vehicle V will be described as an example. The pedestrian airbag apparatus M (hereinafter abbreviated as “airbag apparatus”) of the embodiment is a position close to the rear side of the rear end 15c of the hood panel 15, as shown in FIGS. It is arranged at a position that is approximately the center in the left-right direction of the vehicle V between the left and right front pillars 5L, 5R. In the present specification, unless otherwise specified, the front-rear, up-down, and left-right directions will be described in accordance with the front-rear, up-down, and left-right directions of the vehicle V, respectively.

  In the case of the embodiment, the front bumper 6 (see FIG. 1) of the vehicle V is provided with a sensor (not shown) that can detect a collision with a pedestrian, and a signal from the sensor is not shown. The operation circuit is configured to operate the inflator 30 of the airbag device M when detecting a collision between the vehicle V and a pedestrian based on a signal from the sensor.

  As shown in FIG. 1, the hood panel 15 is arranged so as to cover the upper part of the engine room in the vehicle V, and the vehicle V is provided by a hinge portion (not shown) arranged in the vicinity of the rear end 15 c on both left and right edges. It is connected with respect to the body 1 side so that opening and closing is possible. In the case of the embodiment, the hood panel 15 is made of a plate material such as a steel plate or aluminum (aluminum alloy). As shown in FIGS. 2 and 3, the hood panel 15 is located on the upper surface side and located on the lower surface side and is stronger than the outer panel 15a. And an inner panel 15b that is improved. As shown in FIG. 1, the hood panel 15 has a rear end 15 c side in accordance with a front windshield 4 which will be described later, the left and right ends are positioned forward, and the left and right ends are positioned rearward. It is configured to be curved with respect to the direction.

  As shown in FIGS. 2 and 3, a cowl 7 including a highly rigid cowl panel 7a on the body 1 side and a synthetic resin cowl louver 7b above the cowl panel 7a is disposed behind the hood panel 15. Has been. The cowl louver 7b is disposed so that the rear end side is connected to the lower portion 4a side of the front windshield 4. The cowl 7 is also curved and formed in the left-right direction so that the center of the left and right is positioned forward and the left and right ends are positioned rearward in accordance with the curved shape of the rear end 15c of the hood panel 15. (See FIG. 1). Further, as shown in FIG. 1, a wiper 8 is disposed at the cowl 7. The wiper 8 is disposed so as to protrude upward from the cowl louver 7b as shown by a two-dot chain line in FIGS. Front pillars 5 </ b> L and 5 </ b> R are disposed on the left and right outer sides of the front windshield 4.

  As shown in FIGS. 2 to 4, the airbag device M is folded into an airbag 45, an inflator 30 that supplies inflation gas to the airbag 45, and a case 20 that houses the airbag 45 and the inflator 30. The airbag cover 25 that covers the airbag 45 and the mounting bracket 100 for mounting the mounting piece 72 (72L, 72R) of the airbag 45 to the case 20 are provided.

  As shown in FIGS. 2 and 3, the case 20 is made of sheet metal, and includes a bottom wall portion 21, a substantially square cylindrical peripheral wall portion 22 that extends upward from the bottom wall portion 21 and has an upper end opened. The airbag 45 that is inflated projects from the projecting opening 20a on the upper end side. An attachment bolt 39 as an attachment means for attaching the inflator 30 and an attachment bolt 102 for attaching the attachment piece 72 of the airbag 45 are inserted into the bottom wall portion 21 and fixed with nuts 42 and 104, respectively. A mounting hole 21a is formed (see FIGS. 2 to 4, 17, 18, and 22). And in the airbag apparatus M of embodiment, the bottom wall part 21 of case 20 comprises the member by the side of the body 1 which attaches the inflator 30. FIG. The case 20 is arranged such that the front region is positioned directly below the rear end 15c of the hood panel 15 and the rear region is positioned rearward of the hood panel 15, and a bracket (not shown) is used. The body 1 is attached to the cowl panel 7a. In addition, as shown in FIG. 1, the case 20 is arranged in the left-right direction so that the center of the left and right is positioned forward and the left and right ends are positioned rearward in accordance with the curved shape of the rear end 15c of the hood panel 15. It is curved and configured.

  The airbag cover 25 is made of a soft synthetic resin such as a polyolefin-based thermoplastic elastomer (TPO), and is disposed so as to cover the protruding opening 20a on the upper end side of the case 20, so that the airbag 45 is expanded and inflated. Sometimes, it is configured to have a door portion 26 that can be pushed and opened by the airbag 45 (see FIGS. 2, 3, 22, and 23). The airbag cover 25 is attached to the case 20 at a predetermined location using attachment means (not shown).

  The inflator 30 is configured to include a cylinder-type inflator main body 31 whose outer shape is a substantially cylindrical shape, and a mounting bracket 35 for attaching the inflator main body 31 to the case 20.

  The inflator main body 31 has a substantially cylindrical shape, and the axial direction is substantially along the left-right direction as shown in FIGS. It is the structure arrange | positioned inside the position used as the approximate center of front and rear, right and left (refer the dashed-two dotted line of FIG.5, 6). The inflator body 31 is configured by disposing a gas discharge part 32 having a gas discharge port capable of discharging an expansion gas on one end side in the axial direction (the front end side, in the embodiment, the left end 31a side). Therefore, it is electrically connected to the operating circuit via a lead wire (not shown) extending from the other end side in the axial direction (the base portion side, in the case of the embodiment, the right end 31b side).

  As shown in FIGS. 3 and 4, the mounting bracket 35 for attaching the inflator main body 31 to the case 20 includes a holding portion 36 that holds the inflator main body 31 and a plurality of (in the case of the embodiment, protruding downward) from the holding portion 36. 3) mounting bolts 39. The holding portion 36 is made of sheet metal, and is configured as a strip extending substantially along the left-right direction (the axial direction of the inflator main body 31) so as to support the lower surface side of the inflator main body 31. In this case, the support piece portions 37 that support the inflator main body 31 are arranged to protrude in the front and rear sides at three locations. Each support piece portion 37 is formed so as to be able to support the outer peripheral surface 31c of the inflator main body 31 so as to extend upward from the front and rear edge portions of the holding portion 36 with the tip directed outward in the front-rear direction. It is made symmetrical in front and rear (see FIG. 3). In the case of the embodiment, the support piece portion 37 is formed at a position corresponding to the mounting bolt 39. The mounting bolts 39 are formed so as to protrude downward at three positions, that is, both the left and right ends of the holding portion 36 and the substantially center in the left-right direction. And in this embodiment, this attachment bracket 35 is the structure which attaches the inflator main body 31 by winding the clamp 40 from the outer peripheral side in the state which made the holding | maintenance part 36 hold | maintain the inflator main body 31. As shown in FIG. In the case of the embodiment, the clamps 40 are arranged at two positions on the left and right ends.

  That is, in the inflator 30 according to the embodiment, as shown in FIGS. 3 and 4, attachment as an attachment means is performed from the outer peripheral surface 31 c of the inflator body 31 as the body part to the axial orthogonal direction side (downward side) of the inflator body 31. A bolt 39 is protruded. The inflator 30 is configured so that the mounting bolt 39 protrudes to the outside from an insertion hole 55 and a mounting hole 62 to be described later in a state where the inflator body 31 is attached to the mounting bracket 35 using the clamp 40. 31 and the holding portion 36 of the mounting bracket 35 are accommodated inside the airbag 45 (see the two-dot chain line in FIG. 7). The inflator 30 is configured to be attached to the bottom wall portion 21 of the case 20 that is a member on the body 1 side in a state where the inflator body 31 and the holding portion 36 in the mounting bracket 35 are inserted into the airbag 45. Each mounting bolt 39 as a mounting means protruding from the lid panel 58 protrudes from the bottom wall portion 21 of the case 20 and is fastened to the nut 42 to be attached to the case 20 together with the airbag 45 (FIG. 3). Further, in the embodiment, the inflator 30 is configured such that the outer peripheral side of the inflator main body 31 and the holding portion 36 in the mounting bracket 35 is covered with a tube main body 81 of a cylindrical inner tube 80 having flexibility. 45.

  As shown in FIGS. 5 to 8, the airbag 45 includes a bag body 46 that is inflated by inflating an inflation gas therein, an attachment piece 72 that attaches the vehicle body side wall 46 a side of the bag body 46 to the case 20, and An inner tube 80 that covers the outer peripheral side of the inflator 30 in the bag body 46 is provided. Further, the bag body 46 has an insertion opening 49 for inserting the inflator 30 therein.

  The bag body 46 has a substantially U-shape that is wide when viewed from the front side when viewed from the front side, and is arranged substantially along the left-right direction so as to follow the lower portion 4a of the front windshield 4. And the vertical expansion portions 65L and 65R that extend rearward from both ends of the horizontal expansion portion 48 and cover the lower portions 5a of the front surfaces of the left and right front pillars 5L and 5R. . The bag body 46 has a pedestrian side wall 46b positioned on the upper surface side when the inflation is completed, and a vehicle body side wall 46a positioned on the lower surface side so as to face the pedestrian side wall 46b. The outer peripheral edges of the vehicle body side wall 46a are joined (sewn) over the entire circumference to form a bag.

  In the embodiment, when the expansion is completed, the lateral expansion portion 48 is disposed on the upper surface side of the region from the rear end 15c side portion of the hood panel 15 through the cowl 7 to the lower portion 4a side of the front windshield 4 with the wiper 8. (See FIGS. 21 and 23). The inflator 30 is configured to be housed in the approximate center of the lateral expansion portion 48 in the front, rear, left, and right, and in the vehicle body side wall portion 46a, the region that is the approximate center in the front, rear, left, and right of the lateral expansion portion 48 is as shown in FIG. The insertion opening 49 for inserting the inflator 30 into the inside is configured.

  Specifically, the insertion opening 49 is a region between the front center tether 68 and the rear center tether 67, which will be described later, and between the end side tethers 69L and 69R, that is, front and rear, left and right, in the vehicle body side wall 46a. The region forming the insertion opening 49 is formed by arranging a reinforcing panel 51 on the inner side of the vehicle body side wall portion 46a, and the vehicle body side wall portion 46a (outer panel material). It has a two-layer structure in which a reinforcing panel 51 (inner panel material) is laminated (see FIGS. 9 and 10). The reinforcing panel 51 as the inner panel material is configured as a substantially rectangular shape whose outer shape can cover the insertion opening 49 over the entire region. In the case of the embodiment, the front edge 51a side and the rear edge 51b side Are respectively sewn together when the front center tether 68 and the rear center tether 67 are joined (stitched) to the vehicle body side wall 46a (see FIG. 7). The width dimension W1 (see FIG. 9) of the reinforcing panel 51 on the left and right direction side is the length dimension L1 (see FIG. 4) of the inflator body 31 and the width dimension W4 on the left and right direction side of the tube body 81 in the inner tube 80. 12) and set to about 1/3 of the width dimension W2 (see FIG. 6) on the left and right side of the bag body 46 in a flatly unfolded state.

  As shown in FIGS. 9 to 11, the insertion opening 49 has an outer insertion slit 53 formed in the vehicle body side wall 46 a as an outer panel material and an inner insertion formed in a reinforcing panel 51 as an inner panel material. A slit 54, three insertion holes 55 formed so as to penetrate the vehicle body side wall 46a and the reinforcing panel 51, and a lid panel 58 disposed on the outer peripheral side of the vehicle body side wall 46a.

  The outer insertion slit 53 and the inner insertion slit 54 are for inserting the inflator 30 (the inflator main body 31 as the main body part), and are arranged in a non-intersecting state as a straight line without overlapping each other. ing. Specifically, in the case of the embodiment, the outer insertion slit 53 and the inner insertion slit 54 are substantially along the left-right direction so as to be along the axial direction of the inflator main body 31, respectively, as shown in FIG. It is formed in a straight line. Further, the outer insertion slit 53 and the inner insertion slit 54 are shifted in the front-rear direction side (the circumferential direction side of the inflator main body 31 when mounted on the vehicle) in a state where the bag main body 46 is flatly deployed and in a non-intersecting state. Has been placed. In the embodiment, the outer insertion slit 53 and the inner insertion slit 54 are formed substantially in parallel. Specifically, the inner insertion slits 54 formed in the reinforcing panel 51 are arranged so as to be shifted forward from the outer insertion slits 53. In the embodiment, the outer insertion slit 53 and the inner insertion slit 54 are configured with slightly different length dimensions. Specifically, the outer insertion slit 53 arranged on the outer side has a length dimension L2 set slightly smaller than the length dimension L3 of the inner insertion slit 54 (see FIGS. 9 and 11). The outer insertion slit 53 is set to have a length dimension L2 shorter than a length dimension of the coupling portion 59 that couples (sews) the rear end 58b side of the lid panel 58 to the vehicle body side wall 46a. The inner insertion slit 54 is configured so that the length dimension L3 is substantially the same as the separation distance D1 (see FIG. 9) between the insertion holes 55 provided on the left and right ends. A length dimension L3 of the inner insertion slit 54 is set to be smaller than the length dimension L1 of the inflator body 31 and smaller than the width dimension W3 of the lid panel 58 on the left and right direction side. Specifically, the length dimension L3 of the inner insertion slit 54 is set to about 4/7 of the length dimension L1 of the inflator main body 31, and the length dimension L2 of the outer insertion slit 53 is equal to the length dimension L1 of the inflator main body 31. It is set to about ½ of the length dimension L1. The lengths L2 and L3 of the outer insertion slit 53 and the inner insertion slit 54 are set to be as small as possible so that the inflator 30 (the inflator body 31 with the mounting bracket 35 attached) can be smoothly inserted. The inner insertion slit 54 arranged on the inner side is more preferable than the outer insertion slit 53 in consideration of the insertion workability of the inflator 30 after the insertion work into the outer insertion slit 53. The length dimension is set slightly larger. That is, in the embodiment, the outer insertion slit 53 and the inner insertion slit 54 are the inflator 30 in a state where the inflator 30 is inserted into the bag body 46 with the mounting bolt 39 protruding from the insertion hole 55. Behind the main body 31, the inflator main body 31 is disposed in a region having a width dimension in the left-right direction. Further, the separation distance D2 (see FIG. 9) between the outer insertion slit 53 and the inner insertion slit 54 in the state where the bag body 46 is flatly deployed is the outer diameter D3 (see FIG. 3) of the inflator body 31. It is set approximately the same.

  The insertion hole 55 is for projecting the mounting bolt 39 of the inflator 30 and is formed so as to penetrate the reinforcing panel 51 and the vehicle body side wall 46a. The insertion holes 55 are formed at three locations along the left-right direction. The insertion hole 55 is formed in a region on the front side of the inner insertion slit 54 as shown in FIG. 9 in a state where the bag body 46 is flatly developed. That is, in the embodiment, the inner insertion slit 54 is formed at a position closer to the insertion hole 55 than the outer insertion slit 53. Further, both the inner insertion slit 54 and the outer insertion slit 53 are formed in a region behind the insertion hole 55 in a state where the bag body 46 is flatly developed. In other words, the inner insertion slit 54 and the outer insertion slit 53 are both in one area (rear area) extending from the insertion hole 55 along the circumferential direction of the inflator body 31 when mounted on the vehicle. It is arranged.

  The lid panel 58 is composed of a flexible sheet body, and is configured to be able to close the outer insertion slit 53 on the outer peripheral side of the vehicle body side wall 46a (see FIG. 9). The lid panel 58 has a rectangular shape whose outer shape is wide on the left and right side. The width dimension W3 (see FIG. 9) of the lid panel 58 on the left and right direction side is set larger than the length dimension L2 of the outer insertion slit 53 and smaller than the length dimension L1 of the inflator body 31. The width dimension W3 of the lid panel 58 in the left-right direction is set to be larger than the length dimension L3 of the inner insertion slit 54, and is set to about twice the length dimension L2 of the outer insertion slit 53. . Further, the width dimension W3 of the lid panel 58 on the left and right direction side is set to about 7/10 of the width dimension W1 of the reinforcing panel 51 on the left and right direction side. The width dimension on the front-rear direction side of the lid panel 58 is set to be smaller than the width dimension on the front-rear direction side of the reinforcing panel 51. The lid panel 58 is joined (sewn) to the vehicle body side wall 46a and the reinforcing panel 51 on the rear end 58b side which is one end side. More specifically, the lid panel 58 has a rear end 58b side close to the rear side of the outer insertion slit 53 (the outer insertion slit 53 and the rear center tether 67 when the bag body 46 is flatly deployed). Between the vehicle body side wall 46a and the reinforcing panel 51 over substantially the entire left and right regions.

  As shown in FIG. 9, a connecting portion 59 for connecting (sewing) the rear end 58b of the lid panel 58 to the vehicle body side wall portion 46a and the reinforcing panel 51 is along the left-right direction (substantially parallel to the outer insertion slit 53). ) It is configured to include a linear body portion 60 that is continuously formed, and a terminal portion 61 that is formed so that the front end 61a is directed forward on the left and right ends of the body portion 60. The main body 60 is configured to have a length dimension larger than that of the outer insertion slit 53, and is configured such that the left and right ends are positioned on the left and right sides of the outer insertion slit 53. The terminal portion 61 is disposed on the left and right outward sides of the outer insertion slit 53, and has a substantially straight shape along the front-rear direction so that the tip 61a is positioned on the front side of the outer insertion slit 53. (See FIG. 9). That is, the outer insertion slit 53 is surrounded by the coupling portion 59 on three sides except the front side. In the state where the bag main body 46 is flatly deployed, the separation distance D6 (see FIG. 9) between the main body 60 and the outer insertion slit 53 at the coupling portion 59 is determined when the inflator 30 is inserted into the airbag 45. The body 31 is set to a dimension that allows the main body 31 to be inserted into the outer insertion slit 53 without hindrance. On the front end 58a side, which is the other end side of the lid panel 58, mounting holes 62 for projecting the mounting bolts 39 of the inflator 30 are formed at three locations along the left-right direction corresponding to the insertion holes 55. ing. That is, the lid panel 58 is configured to cover the entire area where the inner insertion slit 54 and the outer insertion slit 53 are arranged in a state where the bag body 46 is flatly developed. In the case of the embodiment, the lid panel 58 is formed by stacking two lid panel base fabrics 92 shown in FIG. As formed.

  In the bag body 46, a rear center tether 67 that connects the pedestrian side wall 46b and the vehicle body side wall 46a so as to be able to regulate a separation distance between the pedestrian side wall 46b and the vehicle body side wall 46a when the inflation is completed. The front center tether 68 and the end tether 69 (69L, 69R) are disposed (see FIGS. 5 to 8). The rear center tether 67 is disposed from the lateral expansion portion 48 to the left and right vertical expansion portions 65L and 65R. The rear center tether 67 is a region on the rear side of the front and rear centers of the horizontal expansion portion 48 (insertion opening 49). In the rear region), it is arranged as a gentle curved shape over the entire length so as to substantially follow the rear edge of the flatly developed bag body 46. As shown in FIGS. 7, 8 and 19, the rear center tether 67 includes a vehicle body side portion 93a arranged on the vehicle body side wall portion 46a side, and a pedestrian side portion 93b arranged on the pedestrian side wall portion 46b side. , And two tether base fabrics 93. The front center tether 68 is located on the left and right sides so as to be substantially along the front edge of the bag body 46 that is flatly spread in the region (front region of the insertion opening 49) that is the front side of the front and rear center of the lateral expansion portion 48. They are arranged as a substantially straight line along the direction. As shown in FIGS. 7, 8 and 20, the front center tether 68 includes a vehicle body side portion 94a arranged on the vehicle body side wall portion 46a side and a pedestrian side portion 94b arranged on the pedestrian side wall portion 46b side. It is formed from two tether base fabrics 94. The end tether 69 (69L, 69R) is a region between the front center tether 68 and the rear center tether 67 (the left region and the right region of the insertion opening 49), and each longitudinal expansion. It is arrange | positioned in the position which becomes the front of the parts 65L and 65R, respectively. The end-side tethers 69L and 69R are also arranged in a substantially left-right symmetric shape as a substantially linear shape along the left-right direction. As shown in FIGS. 8 and 20, the end tethers 69L and 69R are respectively a vehicle body side portion 95a arranged on the vehicle body side wall portion 46a side and a pedestrian side portion 95b arranged on the pedestrian side wall portion 46b side. And two tether base fabrics 95.

  The attachment piece 72 (72L, 72R) for attaching the vehicle body side wall 46a side of the bag main body 46 to the case 20 is composed of a flexible sheet as a separate body from the bag main body 46. FIG. , 14 to 16 are coupled to the vehicle body side wall 46a. This attachment piece part 72 (72L, 72R) is a structure attached to the bottom wall part 21 of the case 20 using the attachment bracket 100 (refer FIG. 17, 18). In the case of the embodiment, as shown in FIG. 6, the attachment piece 72 (72L, 72R) includes the insertion opening 49, the end tethers 69L, 69R, It is arranged at two positions between them at positions that are substantially symmetrical. Each attachment piece 72 is disposed between the front center tether 68 and the rear center tether 67 at a position that is substantially in the front and rear.

  14-16, each attachment piece part 72 is set as the structure provided with the attachment piece main body 73 and the reinforcement piece part 77 arrange | positioned between the attachment piece main body 73 and the vehicle body side wall part 46a. Yes. The attachment piece main body 73 is formed with a through hole 74 through which a later-described attachment bolt 102 formed in the attachment bracket 100 can be inserted. In the case of the embodiment, the mounting piece main body 73 has a substantially rectangular shape with a slightly wide front and rear direction side, and has two through holes 74 arranged side by side on the left and right direction side at a position that is substantially the center in the front and rear direction. It is configured. The reinforcing piece portion 77 is formed to be slightly larger than the attachment piece main body 73 and has a substantially rectangular shape with a slightly wider left and right direction side. It is connected (sewn) to the vehicle body side wall 46a by a connecting portion 78 formed continuously over the entire circumference. The attachment piece main body 73 is located on the front edge 73a side and the rear edge 73b side on both the front and rear sides of the through-hole 74, and is located on the inner side of the coupling part 78 that couples the reinforcing piece part 77 to the vehicle body side wall part 46a. Are respectively sewn (coupled) to the vehicle body side wall 46 a together with the reinforcing piece 77. The coupling portions 75F and 75R that couple the mounting piece main body 73 to the vehicle body side wall portion 46a are formed over substantially the entire left and right sides of the mounting piece main body 73 in a straight line shape substantially along the left-right direction. As shown by the two-dot chain line in FIGS. 15 and 16, the attachment piece 72 is formed so that the attachment bolt 102 of the attachment bracket 100 protrudes from the through hole 74. The mounting plate 101 of the mounting bracket 100 is inserted between the reinforcing piece 77 from the left edge 73c side or the right edge 73d side where the 75F and 75R are not arranged. The separation distance D4 (see FIG. 14) between the coupling sites 75F and 75R in the mounting piece main body 73 facilitates the insertion work of the mounting plate 101 and the insertion work of the mounting bolt 102 into the through hole 74, and penetrates. The dimensions are set such that the mounting bolt 102 can be protruded from the hole 74.

  An inner tube 80 covering the outer peripheral side of the inflator 30 (the inflator main body 31 and the holding portion 36 in the mounting bracket 35) is composed of a flexible sheet, and as shown in FIGS. The tube main body 81 which covers the outer peripheral side of the main body 31 and the holding | maintenance part 36, and the cover part 85 arrange | positioned so that it may extend from the tube main body 81 are provided.

  The tube main body 81 covers the outer peripheral side of the inflator main body 31 and the holding portion 36 and includes outlets 82A and 82B that allow the inflation gas discharged from the gas discharge portion 32 of the inflator main body 31 to flow out. . In the case of the embodiment, the tube main body 81 is configured to insert the inflator 30 from the right end 81b side with the right end 81b side in a flatly deployed state as the base portion side, and opens both left and right end sides. The left end 81a side, which is the front end side, is branched, and on the left end 81a side, there are two outflow ports 82A and 82B that allow the inflation gas discharged from the inflator body 31 to flow out to the left and obliquely upward to the right. It is configured (see FIG. 12). The tube main body 81 is formed with three insertion holes 83 along the left-right direction for projecting the mounting bolt 39 of the mounting bracket 35 holding the inflator main body 31. The tube main body 81 is configured to be able to cover the outer peripheral side of the inflator main body 31 over the entire periphery, and the width dimension W4 (see FIG. 12) on the left and right side of the inflated state is set to It is set larger than the length dimension L1. The width dimension W4 on the left and right side of the tube body 81 is set to be larger than the width dimension W3 on the left and right side of the lid panel 58 in the insertion opening 49 when the bag body 46 is flatly deployed. The tube main body 81 is disposed so as to extend outwardly on the left and right sides of the lid panel 58 in a state of being accommodated in the bag main body 46 (see FIG. 9). The tube body 81 is formed into a cylindrical shape by folding the tube body base fabric 96 shown in FIG. 20 in half and sewing (bonding) the corresponding edges to each other.

  The cover portion 85 has a width dimension in the left-right direction that is substantially the same as that of the tube main body 81, and the base portion 85 a side that is one end side is coupled (sewn) to the vicinity of the front side of the insertion hole 83 in the tube main body 81. ), And the tip 85b side that is the other end side is a free end, and is arranged to extend rearward from the tube body 81 (see FIG. 10). In the vicinity of the base portion 85a of the cover portion 85, an insertion hole 86 for projecting the mounting bolt 39 of the mounting bracket 35 is formed at a position corresponding to the insertion hole 83 formed in the tube main body 81 (see FIG. 12, 13). The cover portion 85 has a length dimension L4 (distance from the insertion hole 86 to the tip 85b, see FIG. 12), and a separation distance D5 between the insertion hole 55 and the outer insertion slit 53 in a state where the bag body 46 is flatly deployed. (See FIG. 9) is set larger than the inner insertion slit 54 on the inner peripheral side of the reinforcing panel 51 and extends further rearward than the outer insertion slit 53 when mounted on the vehicle. It is the structure arranged. In other words, in the embodiment, the front end 85 b that is a free end in the cover portion 85 is disposed at a position beyond the inner insertion slit 54 and behind the outer insertion slit 53. The cover portion 85 is configured so that the width dimension in the left-right direction is substantially the same as that of the tube body 81. In other words, the width dimension in the left-right direction is greater than the width dimension W3 in the left-right direction of the lid panel 58. It is set larger than the length dimension L3 of the inner insertion slit 54. That is, the cover portion 85 is configured to cover the inner insertion slit 54 formed in the reinforcing panel 51 over the entire area from the inner peripheral side.

  As shown in FIGS. 19 and 20, the airbag 45 includes a vehicle body side base fabric 90 constituting the vehicle body side wall portion 46 a and a pedestrian side base fabric 91 constituting the pedestrian side wall portion 46 b and a lid panel 58. A lid panel base fabric 92, a rear center tether 67, a tether base fabric 93, a front center tether 68, a tether base fabric 94, and an end tether 69, a tether base The cloth 95, the tube main body 96 of the inner tube 80 and the tube main body cloth 96 and the cover base cloth 97 constituting the cover 85, and the inner panel disposed at the position of the insertion opening 49 in the vehicle body side wall 46a. It is composed of a reinforcing panel 51 as a material, an attachment piece main body 73 and a reinforcement piece portion 77 constituting the attachment piece portion 72. These base fabrics (materials) are prepared by cutting a coated fabric obtained by applying a coating agent for preventing gas leakage onto the surface of a woven fabric formed by weaving polyamide yarn or polyester yarn. Is formed.

  The mounting bracket 100 for mounting the mounting piece 72 (72L, 72R) to the bottom wall 21 of the case 20 includes a substantially rectangular plate-shaped mounting plate 101 and a mounting bolt 102 protruding downward from the mounting plate 101, respectively. It is prepared for. The mounting plate 101 is configured as a substantially rectangular shape having an outer shape that is wide on the left and right sides, as shown by a two-dot chain line in FIG. 14, and the lower surface is attached to the mounting piece 72. The single body 73 covers the substantially entire area. Two mounting bolts 102 are juxtaposed along the left-right direction. The mounting bracket 100 is configured such that the mounting bolt 102 protruding from the mounting piece main body 73 of the mounting piece 72 is protruded from the bottom wall portion 21 of the case 20 and is fastened with a nut 104, thereby fixing the mounting piece 72 to the case 20. It is the structure attached to the bottom wall part 21 of this (refer FIG. 17, 18).

  Next, the mounting of the airbag apparatus M of the embodiment on the vehicle V will be described. The inflator 30 uses the clamp 40 to hold the inflator main body 31 on the mounting bracket 35 so that the mounting bolt 39 protrudes from the insertion hole 83 into the tube main body 81 of the inner tube 80 in advance. Let me insert it. At this time, the attachment bolt 39 is also inserted through the insertion hole 86 formed in the cover portion 85 of the inner tube 80. First, the airbag 45 is folded so as to be housed in the case 20, and the periphery of the folded airbag 45 is wrapped with a wrapping material (not shown) that can be broken to prevent collapse. At this time, the portions of the insertion opening 49 and the attachment piece 72 in the airbag 45 are exposed from the wrapping material. Next, the lid panel 58 of the insertion opening 49 is opened, and the inflator 30 is inserted into the bag body 46 through the outer insertion slit 53 and the inner insertion slit 54 together with the inner tube 80, and each mounting bolt 39. Is protruded from the insertion hole 55, and the inflator 30 is stored inside the bag body 46. At this time, the cover portion 85 of the inner tube 80 is unfolded flat in the bag body 46. Thereafter, the lid panel 58 is closed so as to cover the outer insertion slit 53, and the respective mounting bolts 39 are inserted into the mounting holes 62 on the front end 58a side. Further, the mounting bracket 100 is mounted on each mounting piece 72 so that the mounting bolt 102 protrudes from the through hole 74, and the airbag assembly AM is manufactured. Thereafter, the airbag assembly assembly AM is accommodated in the case 20 so that the mounting bolts 39 and 102 protrude from the bottom wall portion 21, and is attached to the mounting bolts 39 and 102 protruding from the bottom wall portion 21. If the nuts 42 and 104 are fastened, the airbag 45 (bag main body 46) and the inflator 30 can be attached to the case 20, and the attachment piece 72 can be connected to the case 20. And if the airbag cover 25 is attached to the case 20, a bracket (not shown) extending from the case 20 is attached to the cowl panel 7a, and the inflator body 31 is connected to an operating circuit (not shown), the airbag device M is attached to the vehicle V. Can be installed.

  In the airbag apparatus M according to the embodiment, the inflator 30 is activated when an operation circuit (not shown) detects a collision with a pedestrian of the vehicle V based on a signal from a sensor (not shown) disposed on the front bumper 6. Then, the inflation gas is caused to flow into the airbag 45 and the airbag 45 is inflated. The airbag 45 is formed by pushing the door 26 of the airbag cover 25 open and pushing the door 26 open. While projecting upward from the projecting opening 20a of the case 20, from the upper surface of the rear end 15c of the hood panel 15 to the upper surface of the cowl 7, the lower part 5a side of the front surface of the front pillars 5L and 5R is covered. The expansion is completed (see the two-dot chain line in FIG. 1 and FIGS. 21 and 23).

  In the airbag apparatus M of the embodiment, the insertion opening 49 has a two-layer structure in which a vehicle body side wall 46a as an outer panel material and a reinforcing panel 51 as an inner panel material are stacked. The outer insertion slit 53 and the inner insertion slit 54 formed in the side wall portion 46a and the reinforcing panel 51, respectively, are on the circumferential side of the inflator body 31 (the front and rear direction side when the bag body 46 is flatly deployed). They are displaced and arranged in a non-intersecting state. That is, the outer insertion slit 53 and the inner insertion slit 54 are not formed so as to overlap each other, and the region of the outer insertion slit 53 formed in the vehicle body side wall portion 46a is covered with the reinforcing panel 51 and is reinforced. Since the region of the inner insertion slit 54 formed in the panel 51 is covered by the vehicle body side wall portion 46a, the inflation gas flowing into the airbag 45 (bag body 46) becomes the outer insertion slit 53, the inner insertion slit. It is possible to suppress leakage from the slit 54 to the outside.

  Therefore, in the airbag apparatus M of the embodiment, even if the inflator 30 is configured to be housed in the airbag 45, leakage of the inflation gas that has flowed into the interior can be suppressed.

  Further, in the airbag device M of the embodiment, the outer insertion slit 53 and the inner insertion slit 54 are each configured to be linearly arranged so as to be substantially parallel to each other. As compared with the case where the slit for inner use and the slit for inner insertion are not parallel, the insertion workability of the main body portion of the inflator is improved. The outer insertion slit and the inner insertion slit need not be formed in parallel as long as they are arranged in a non-intersecting state. For example, the outer insertion slit and the inner insertion slit may be arranged in a “C” shape.

  Furthermore, in the airbag apparatus M of the embodiment, the outer insertion slit 53 and the inner insertion slit 54 are formed substantially along the axial direction of the inflator body 31 (main body part), and the circumferential direction of the inflator body 31 It is the structure arrange | positioned so that it may slip | deviate on the side. Therefore, when the inflator 30 (inflator main body 31) is inserted into the airbag 45 (bag main body 46), the inflator main body 31 is arranged so that the axial direction is substantially along the outer insertion slit 53 and the inner insertion slit 54. Are inserted into the outer insertion slit 53 and the inner insertion slit 54. Therefore, even if the inflator 30 is configured to include a mounting bolt 39 as mounting means that protrudes in the direction perpendicular to the axis of the inflator body 31, the mounting bolt 39 includes the outer insertion slit 53 and the inner insertion slit. The inflator main body 31 can be smoothly inserted into the airbag 45 through the outer insertion slit 53 and the inner insertion slit 54 without interfering with the peripheral portion of the peripheral portion 54. That is, in the airbag apparatus M of the embodiment, the insertion work of the inflator body 31 into the outer insertion slit 53 and the inner insertion slit 54 and the insertion hole of the mounting bolt 39 as the mounting means protruding from the inflator body 31 55, the inflator body 31 can be moved simply by moving or rotating the inflator body 31 in the direction perpendicular to the axis, the insertion of the inflator body 31 into the outer insertion slit 53 and the inner insertion slit 54, The protrusion of the mounting bolt 39 from the insertion hole 55 can be easily performed. Therefore, the workability of inserting the inflator 30 into the airbag 45 is further improved. If this point is not taken into consideration, the outer insertion slit 53D and the inner insertion slit 54D are arranged on the axial direction side of the inflator body 31 (left side in FIG. 29) as in the airbag 45D shown in FIG. It is good also as a structure arrange | positioned so that it may cross | intersect with respect to the axial direction of the inflator main body 31 in the position shifted | deviated. Furthermore, as shown by a two-dot chain line in FIG. 29, the outer insertion slit 53D and the inner insertion slit 54D may be arranged so as to be substantially orthogonal to the axial direction of the inflator body 31. Even in such a configuration, the lid panel 58D is preferably disposed so as to cover the region of the outer insertion slit 53D and the inner insertion slit 54D.

  Further, in the airbag apparatus M of the embodiment, the flexible lid panel 58 configured to be able to close the outer insertion slit 53 on the outer peripheral side of the vehicle body side wall portion 46a in the insertion opening 49, The lid panel 58 has a rear end 58b coupled to the vehicle body side wall 46a and the reinforcing panel 51, and a mounting bolt 39 projecting from the front end 58a corresponding to the insertion hole 55. This is a configuration in which mounting holes 62 are provided. Therefore, since the outer peripheral side of the outer insertion slit 53 can be covered with the lid panel 58, the inflation gas flowing into the airbag 45 can be prevented from leaking from the outer insertion slit 53, and the inflation gas Leakage can be further suppressed. In particular, in the airbag apparatus M of the embodiment, the main body portion 60 of the coupling portion 59 that couples the rear end 58b of the lid panel 58 to the vehicle body side wall portion 46a side is disposed close to the rear side of the outer insertion slit 53. In addition, the terminal portions 61 and 61 disposed on both ends of the main body 60 are formed so as to cover the left and right sides of the outer insertion slit 53, and the outer insertion slit 53 excludes the front side. The three sides are surrounded by the binding site 59. Therefore, when the airbag 45 (bag body 46) is inflated, it is difficult for a gap to be formed between the peripheral portion of the outer insertion slit 53 in the vehicle body side wall portion 46a and the lid panel 58, and for the outer side insertion in the vehicle body side wall portion 46a. The peripheral portion of the slit 53 can also be suppressed from being pulled so as to open the outer insertion slit 53, and the leakage of the inflation gas from the outer insertion slit 53 can be accurately controlled. In addition, if such a point is not considered, it is good also as a structure which does not arrange | position a cover panel in the opening part for insertion.

  Furthermore, in the airbag apparatus M of the embodiment, the inflator 30 is configured such that the outer peripheral side of the inflator body 31 is covered with a flexible tubular inner tube 80 and is stored in the airbag 45. The inner tube 80 includes a tube main body 81 that covers the outer peripheral side of the inflator main body 31, and a cover portion 85 that is arranged to extend from the tube main body 81. The cover portion 85 is on one end side. The base portion 85a side is coupled to the tube body 81, and the distal end 85b side which is the other end side is a free end, and extends from the tube body 81 to cover the inner insertion slit 54 formed in the reinforcing panel 51 from the inner peripheral side. It is configured to be possible. Therefore, the inflation gas discharged from the inflator main body 31 flows into the airbag 45 (bag main body 46) through the outlets 82A and 82B of the tube main body 81, and enters the inner insertion slit 54 side. It is possible to suppress the flow in the opposite direction. Further, the inner peripheral side of the inner insertion slit 54 can be covered with a cover portion 85, and the cover portion 85 has a free end on the front end 85 b side. Therefore, the inflation flowed into the airbag 45. Thus, the expansion gas that has flowed into the airbag 45 is pressed against the inner peripheral surface side (the inner peripheral surface side of the reinforcing panel 51) of the inner insertion slit 54 by the working gas. It is possible to prevent leakage to the outside through the above, and it is possible to more appropriately suppress the leakage of the expansion gas. In particular, in the airbag device according to the embodiment, the cover portion 85 greatly extends rearward so as to cover the upper side (inside) of the outer insertion slit 53 disposed on the rear side, beyond the inner insertion slit 54. Therefore, the expansion gas flowing into the bag body 46 is pressed toward the vehicle body side wall 46a side in a wide area, so that it can be prevented from floating inside the bag body 46 and inserted inside. The inner peripheral side of the slit 65 for use can be covered accurately. Of course, the cover portion does not have to be extended to cover the upper region of the outer insertion slit. If the above points are not taken into consideration, the inner tube may not be disposed as an airbag. Further, even if the inner tube is provided, the cover portion is not provided on the inner tube. It is good.

  Furthermore, in the airbag apparatus M of the embodiment, the outer insertion slit 53 and the inner insertion slit 54 are both arranged in a region on the rear side of the insertion hole 55 in a state where the bag body 46 is flatly deployed. The outer insertion slit 53 and the inner insertion slit 54 are both disposed in one region (rear side) extending from the insertion hole 55 along the circumferential direction of the inflator body 31. This is a configuration. Therefore, compared with the case where the outer insertion slit and the inner insertion slit are arranged on both sides with the insertion hole therebetween, the strength of the peripheral portion of the insertion hole 55 in the airbag 45 can be ensured. If such a point is not taken into consideration, the outer insertion slit and the inner insertion slit may be arranged on both sides with the insertion hole therebetween.

  Furthermore, in the airbag apparatus M of the embodiment, since the inner insertion slit 54 is formed at a position closer to the insertion hole 55 than the outer insertion slit 53, the inflator main body 31 is inserted into the outer side. When the insertion bolt 39 is inserted through the slit 53 and the inner insertion slit 54 and then the mounting bolt 39 is protruded from the insertion hole 55, the arrangement positions of the inner insertion slit and the outer insertion slit are reversed. In comparison, since the mounting bolt 39 of the inflator 30 inserted in the inner insertion slit 54 is disposed in the vicinity of the insertion hole 55, the insertion hole of the mounting bolt 39 after insertion into the inner insertion slit 54 is provided. The projecting work from 55 becomes easy. If such points are not taken into consideration, the arrangement positions of the inner insertion slit and the outer insertion slit are reversed, and the outer insertion slit is arranged at a position closer to the insertion hole than the inner insertion slit. A configuration may be adopted.

  Moreover, you may use the thing of the structure shown to FIGS. 24-26 as the airbag 45A. In this airbag 45A, the insertion opening 49A is configured such that the guide member 110 is disposed between the vehicle body side wall 46a as the outer panel material and the reinforcing panel 51A as the inner panel material. Is the same configuration as the airbag 45 described above, and the same members are denoted by “A” at the end of the same reference numerals, and detailed description thereof is omitted.

  The guide member 110 serves as a guide when the inflator 30 (inflator body 31) is inserted therein, and is configured from a flexible sheet. In the case of the embodiment, the guide member 110 is the same as the base fabric (material) constituting the airbag 45A, and a coating agent for preventing gas leakage on the surface of the woven fabric formed by weaving polyamide yarn, polyester yarn or the like. It is formed from the coat cloth which apply | coated. As shown in FIGS. 25 and 26, the guide member 110 has a rear end 110b side at the portion between the outer insertion slit 53A and the inner insertion slit 54A on the inner peripheral side of the vehicle body side wall portion 46a (vehicle body side wall portion 46a). The rear end 110b is coupled (sewn) to the vehicle body side wall portion 46a by a coupling site (stitching site) 111 formed in a straight line over substantially the entire left and right regions. The front end portion 110c is arranged so as to cover the inner peripheral side of the reinforcing panel 51A so as to be inserted through the inner insertion slit 54A. Further, an insertion hole 110d is formed in the front end side portion 11c corresponding to the insertion hole 55A. In the case of the embodiment, the guide member 110 is sewn together with the front end 110a together with the front edge 51a side of the reinforcing panel 51A when the front center tether 68A is joined (sewn) to the vehicle body side wall portion 46a. (See FIG. 25). In the case of the embodiment, the guide member 110 can be inserted into the inner insertion slit 54 </ b> A in the lateral dimension W <b> 5 (see FIG. 24) with the outer shape being a substantially rectangular shape with the lateral direction being wide. The inner insertion slit 54A is set to be slightly smaller than the length dimension.

  When the airbag 45A having such a configuration is used, when the inflator 30 (the inflator body 31) is inserted into the inside through the inner insertion slit 54A, the guide member 110 inserted through the inner insertion slit 54A The gap between the reinforcing panel 51A as the inner panel material and the vehicle body side wall portion 46a as the outer panel material is closed, and the inflator 30 is connected to the vehicle body side wall portion 46a with the reinforcing panel 51A by the guide member 110. It is possible to guide the air bag 45 </ b> A (bag body 46 </ b> A) while entering the air bag 45 </ b> A. Therefore, the inflator 30 (inflator main body 31) can be easily inserted into the airbag 45A (bag main body 46A).

  In the embodiment, the guide member 110 is configured as a substantially rectangular shape in which the width dimension in the left-right direction is set slightly smaller than the length dimension of the inner insertion slit 54A, but the outer shape of the guide member is However, the present invention is not limited to this, and if it is possible to suppress erroneous insertion of the inflator, for example, the width dimension in the left-right direction can be made smaller than the inner insertion slit 54A and the belt-like shape can be arranged to extend in the front-rear direction. Good.

  Also in the airbag 45A having the above-described configuration, a flexible lid panel 58A configured to be able to close the outer insertion slit 53A on the outer peripheral side of the vehicle body side wall portion 46a in the insertion opening 49A, The lid panel 58A has a rear end 58b side coupled to the vehicle body side wall 46a and the reinforcing panel 51A, and a mounting bolt 39 corresponding to the insertion hole 55A is formed on the front end 58a side. The mounting hole 62A for projecting is arranged. Therefore, since the outer peripheral side of the outer insertion slit 53A can be covered by the lid panel 58A, the inflation gas flowing into the airbag 45A can be prevented from leaking from the outer insertion slit 53A, and the inflation gas Leakage can be further suppressed.

  If this point is not taken into consideration, like the airbag 45B shown in FIG. 27, the lid panel 58B is inserted through the outer insertion slit 53B, and the rear end 58b side of the vehicle body side wall 46a is placed. It is good also as a structure couple | bonded with the vehicle body side wall part 46a and the reinforcement panel 51B in the state arrange | positioned at the inner peripheral side.

  Furthermore, in the airbag 45A configured as described above, the outer insertion slit 53A and the inner insertion slit 54A are linearly arranged so as to be substantially parallel to each other. Compared to the case where the insertion slit and the inner insertion slit are not parallel, the insertion workability of the inflator body is improved.

  Furthermore, also in the airbag 45A configured as described above, the outer insertion slit 53A and the inner insertion slit 54A are formed substantially along the axial direction of the inflator body 31, and are shifted on the circumferential side of the inflator body 31. It is the structure arranged like this. Therefore, when the inflator 30 (inflator main body 31) is inserted into the airbag 45A (bag main body 46A), the inflator main body 31 is arranged so that the axial direction is substantially along the outer insertion slit 53A and the inner insertion slit 54A. Are inserted into the outer insertion slit 53A and the inner insertion slit 54A. Therefore, even if the inflator 30 is configured to include a mounting bolt 39 as mounting means that protrudes in the direction orthogonal to the axis of the inflator body 31, the mounting bolt 39 includes the outer insertion slit 53A and the inner insertion slit. The inflator main body 31 can be smoothly inserted into the air bag 45A through the outer insertion slit 53A and the inner insertion slit 54A without interfering with the peripheral portion of 54A. That is, also in the airbag 45A having the above-described configuration, the operation of inserting the inflator main body 31 into the outer insertion slit 53A and the inner insertion slit 54A and the insertion hole 55A of the mounting bolt 39 protruding from the inflator main body 31 are provided. The projecting operation can be performed simply by moving or rotating the inflator main body 31 in the direction perpendicular to the axis, inserting the inflator main body 31 into the outer insertion slit 53A and the inner insertion slit 54A, and mounting bolts 39. It is possible to easily perform the protrusion from the insertion hole 55A. As a result, the workability of inserting the inflator 30 into the airbag 45A is further improved.

  Furthermore, also in the airbag 45A having the above-described configuration, the outer insertion slit 53A and the inner insertion slit 54A are arranged in a region on the rear side of the insertion hole 55A in a state where the bag body 46A is flatly deployed. The outer insertion slit 53A and the inner insertion slit 54A are both disposed in a region on one side (rear side) extending along the circumferential direction of the inflator body 31 from the insertion hole 55A. This is a configuration. Therefore, compared with the case where the outer insertion slit and the inner insertion slit are arranged on both sides with the insertion hole therebetween, the strength of the peripheral portion of the insertion hole 55 in the airbag 45 can be ensured.

  If such a point is not taken into consideration, as shown in FIG. 28, as the airbag 45C, an insertion hole 55C is formed in a region between the outer insertion slit 53C and the inner insertion slit 54C. May be used. With such a configuration, the airbag 45C is attached to the body side of the vehicle in a state where the region between the outer insertion slit 53C and the inner insertion slit 54C is pressed by the inflator body 31. As shown in FIG. 28, even if the cover panel is not provided, the leakage of the inflation gas that has flowed into the airbag 45C can be accurately suppressed.

  The airbag apparatus M of embodiment is for protecting a pedestrian. The pedestrian airbag device has a longer time to receive a pedestrian as a protection target after the completion of inflation, compared to various airbag devices mounted in other vehicle interiors. Although high internal pressure maintenance performance is required even after a lapse of time, the airbag apparatus M according to the embodiment is configured to suppress leakage of the inflation gas from the insertion opening 49 for inserting the inflator 30. Has been. In particular, in the airbag apparatus M of the embodiment, the length dimensions L2 and L3 of the outer insertion slit 53 and the inner insertion slit 54 are both set smaller than the length dimension L1 of the inflator body 31, and further, The length dimension L3 of the insertion slit 53 is set smaller than the length dimension L2 of the inner insertion slit 54, and these length dimensions L2 and L3 are the smoothness of the inflator 30 from which the mounting bolt 39 is projected. It is set as small as possible so as not to hinder proper insertion work. Further, as described above, the outer insertion slit 53 arranged on the outer side is configured to be covered with the coupling portion 59 that couples the lid panel 58 to the vehicle body side wall 46a side. Since the inner peripheral side is configured to be covered by the cover portion 85 of the inner tube 80, the inflation gas flowing into the bag body 46 leaks to the outside through the inner insertion slit 54 and the outer insertion slit 53. This can be suppressed as much as possible. In addition, in the airbag apparatus M of the embodiment, the mounting piece 72 for connecting the vehicle body side wall 46a side to the bottom wall 21 of the case 20 is configured as a separate body from the bag body 46, and this mounting piece The mounting bracket 100 is attached to 72, and the mounting bracket 100 for connecting the vehicle body side wall portion 46a side to the case 20 on the body 1 side is not directly attached to the vehicle body side wall portion 46a. Therefore, gas leakage from this part can also be suppressed. Therefore, in the airbag apparatus M of the embodiment, the airbag 45 can maintain a high internal pressure even after a predetermined time has elapsed from the completion of the inflation, and the airbag 45 in a state in which the high internal pressure is maintained can accurately identify the pedestrian. Can take it.

  In the embodiment, the pedestrian airbag device mounted in the cowl region of the vehicle has been described as an example. However, the airbag device of the present invention uses an airbag configured to house an inflator therein. If it is an airbag apparatus, it will not be restricted to the airbag apparatus for pedestrians, For example, this invention is applicable also to the side airbag apparatus mounted in the seat bag of a seat.

  DESCRIPTION OF SYMBOLS 1 ... Body, 20 ... Case, 21 ... Bottom wall part, 21a ... Mounting hole, 30 ... Inflator, 31 ... Inflator main body (main body part), 35 ... Mounting bracket, 39 ... Mounting bolt (mounting means), 42 ... Nut, 45, 45A, 45B, 45C, 45D ... airbag, 46 ... bag body, 46a ... vehicle body side wall (outside panel material), 46b ... pedestrian side wall, 49 ... opening for insertion, 51, 51A, 51B, 51D ... Reinforcing panel (inner panel material), 53, 53A, 53B, 53C, 53D ... Outer insertion slit, 54, 54A, 54B, 54C, 54D ... Inner insertion slit, 55 ... Insertion hole, 58, 58A, 58B, 58D ... Lid panel, 58a ... Front end, 58b ... Rear end, 59 ... Coupling site, 62 ... Mounting hole, 80 ... Inner tube, 81 ... Tube body, 82A, 82 ... outlet, 83 ... insertion holes, 85 ... cover, 110 ... guide member, 110a ... front, 110b ... rear end, 111 ... binding sites, V ... vehicle, M ... pedestrian airbag apparatus.

Claims (14)

A bag-like airbag that inflates by inflating an inflation gas therein, and an inflator that supplies the inflation gas to the airbag; and
The inflator
A main body having a substantially cylindrical outer shape, and an attaching means for projecting from the outer peripheral surface of the main body to the axis-orthogonal direction side of the main body to be attached to the body of the vehicle,
An airbag device configured to be attached to the body side in a state where the attachment means protrudes to the outside and the main body portion is inserted into the airbag,
The airbag has an insertion opening for inserting the inflator therein,
In the airbag, the region constituting the opening for insertion has a two-layer structure in which an outer panel member and an inner panel member composed of a flexible sheet body are laminated,
The insertion opening is formed in the outer panel material and the inner panel material, respectively, and the outer insertion slit and the inner insertion slit for inserting the main body portion, and the outer panel material and the inner panel material. And an insertion hole formed so as to penetrate and projecting the attachment means.
The airbag device, wherein the outer insertion slit and the inner insertion slit are arranged in a non-intersecting state without overlapping each other.   The airbag device according to claim 1, wherein the outer insertion slit and the inner insertion slit are linearly arranged so as to be substantially parallel to each other.   The outer insertion slit and the inner insertion slit are formed substantially along the axial direction of the main body, and are arranged so as to be displaced on the circumferential side of the main body. Item 3. The airbag device according to Item 2. The insertion opening is configured to include a flexible lid panel configured to be able to close the outer insertion slit on the outer peripheral side of the outer panel member,
The lid panel is configured such that one end side is coupled to the outer panel material side, and the other end side is provided with a mounting hole for projecting the mounting means corresponding to the insertion hole. The airbag device according to any one of claims 1 to 3, wherein the airbag device is provided. The inflator is configured so that the outer peripheral side of the main body is covered with a flexible cylindrical inner tube and is stored in the airbag.
The inner tube is
A tube main body having an outlet for covering the outer peripheral side of the main body and allowing the inflation gas discharged from the main body to flow out;
One end side is connected to the tube main body, the other end side is a free end, and is arranged to extend from the tube main body, so that the inner insertion slit formed in the inner panel material can be covered from the inner peripheral side. A cover part configured;
The airbag device according to any one of claims 1 to 4, wherein the airbag device is configured to include:   2. The outer insertion slit and the inner insertion slit are both disposed in a region on one side extending from the insertion hole along the circumferential direction of the main body. The airbag device according to any one of 5.   The airbag device according to claim 6, wherein the inner insertion slit is formed at a position closer to the insertion hole than the outer insertion slit. The insertion opening is configured to dispose a guide member that serves as a guide when inserting the inflator between the outer panel member and the inner panel member,
The guide member is formed of a flexible sheet body, and one end side is a portion between the outer insertion slit and the inner insertion slit, on the inner peripheral side of the outer panel material. The other end side region is arranged so as to cover the inner peripheral side of the inner panel material so as to be overlapped with the outer panel material and to be inserted through the inner insertion slit. The airbag device according to claim 1, wherein the airbag device is configured as follows. The insertion opening is configured to include a flexible lid panel configured to be able to close the outer insertion slit on the outer peripheral side of the outer panel member,
The lid panel is configured such that one end side is coupled to the outer panel material side, and the other end side is provided with a mounting hole for projecting the mounting means corresponding to the insertion hole. The airbag device according to claim 8, wherein   The airbag device according to claim 9, wherein the outer insertion slit and the inner insertion slit are linearly arranged so as to be substantially parallel to each other.   The outer insertion slit and the inner insertion slit are formed substantially along the axial direction of the main body, and are arranged so as to be displaced on the circumferential side of the main body. Item 11. The airbag device according to Item 10.   The said cover panel is set as the structure which arrange | positions the said one end side in the inner peripheral side of the said outer side panel material so that the said slit for outer side insertion may be penetrated. The airbag apparatus of Claim 1.   The airbag device according to claim 8, wherein the insertion hole is formed in a region between the outer insertion slit and the inner insertion slit.   10. The outer insertion slit and the inner insertion slit are both disposed in a region on one side extending from the insertion hole along the circumferential direction of the main body. The airbag device according to any one of 12.

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