JP6508105B2 - Pedestrian airbag device - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a pedestrian airbag device configured to arrange an inflated airbag so as to cover an upper portion of a front cowl of a front windshield of a vehicle when activated.

  Conventionally, as an air bag apparatus for pedestrians, inflating gas is allowed to flow into an air bag for pedestrian protection folded and stored at a storage site at the time of operation, and the air bag is taken from the storage site to the hood of the vehicle. It is made to project from the lower part near the rear end of the panel, and is deployed and inflated so as to cover the upper side of the front windshield (see, for example, Patent Document 1). Then, when the airbag at the completion of the inflation receives the pedestrian, in order to receive the pedestrian without rebounding, it is configured such that a large deformation stroke can be secured, and specifically, the inflation is completed. At the time of completion, a gap is formed between the front windshield and the front windshield to complete the expansion.

  Also, in the airbag of another pedestrian airbag apparatus, straps that pull forward are provided on the left and right of the rear lower surface of the airbag, and the cross-sectional shape of the airbag in the front-rear direction at the completion of inflation is inverted U-shaped. There is also one that is configured to be bent, and a gap is provided between the airbag and the front windshield upon completion of inflation (see, for example, Patent Document 2).

European Patent No. 2520471 European Patent Application Publication No. 2502794

  However, in the pedestrian air bag device described in Patent Document 1 above, the air bag at the completion of expansion extends the rear side extending from the front edge side of the front windshield long and makes the rear end side contact the front windshield It is configured to float on the front side of the contact portion with the front windshield at the rear end so as to provide a space (space) for deformation stroke with the front windshield. Therefore, it is inevitable that the capacity of the air bag is increased as the air bag extends rearward, so that the material constituting the air bag increases, or an inflator having a large output is required. As a result, it has not been possible to simply construct an air bag in which a gap for deformation stroke is opened between the front windshield and the front windshield to inflate.

  Further, even with the pedestrian airbag apparatus described in Patent Document 2 described above, it is necessary to provide straps on the left and right sides of the lower surface of the airbag, and further, when mounted on a vehicle, the front end side of the strap is on the vehicle side A process of bonding and the like is also required, and similarly, the air bag can not be simply configured as an air bag in which a gap for a deformation stroke is opened and inflated between the air bag and the front windshield.

  SUMMARY OF THE INVENTION The present invention solves the above-described problems, and provides a pedestrian airbag device capable of simply forming an airbag that is inflated by opening a gap for a deformation stroke with the front windshield. Intended to be provided.

The pedestrian air bag device according to the present invention has a cover expansion portion capable of covering the upper part of the cowl at the front edge side of the front windshield of the vehicle when the expansion with the expansion gas from the inflator is completed is completed. A pedestrian airbag device comprising: an airbag configured;
The air bag includes a bag body having the cover expansion portion, and supplies inflation gas from the inflator to the bag body, and is connected to the vehicle side, the front side of the cover expansion portion And a gas inlet portion disposed below and in communication with the cover expansion portion.
The cover inflating portion has an expansion completed shape,
It has a curved shape so that the left and right end sides are disposed lower than near the center in the left-right direction,
It is characterized in that at least the area on the rear side is configured as a shape having a gap that floats upward from the front windshield.

  In the pedestrian air bag device according to the present invention, the bag body of the air bag passes the lower gas inflow portion on the front side of the cover inflating portion to allow the inflating gas from the inflator to flow to complete the inflating. In this case, the cover expansion portion is curved so as to arrange the left and right end sides downward from the vicinity of the center in the left-right direction, and at least the rear side area is floated upward from the front windshield The expansion is completed as a shape securing a clearance for the deformation stroke.

  Therefore, when the cover expansion portion receives a pedestrian, the rear side of the cover expansion portion floating from the front windshield descends below the vicinity of the center in the left-right direction of the cover expansion portion until it descends to contact the front windshield. The left and right ends located on the front side are in contact with and supported by the vehicle body side part such as the front pillar and the front windshield, and the bag body is deformed, so that the kinetic energy of the pedestrian can be absorbed by the deformation. After that, if the rear side of the cover expansion part which has floated from the front windshield contacts the front windshield, a cushioning action to raise the internal pressure of the cover expansion part can be exerted, and the pedestrian can be properly received.

  In the airbag apparatus for pedestrians according to the present invention, the cover expansion portion of the bag body is extended rearward from the portion floated from the front windshield to increase the capacity so as to contact the front windshield. Alternatively, without providing a strap on the lower surface side of the cover expansion portion, as a configuration of the cover expansion portion, the rear side is floated from the front windshield, and the left and right side ends are simply lowered by curving. A configuration can be obtained in which a gap for a predetermined deformation stroke can be secured between the front windshield and the front windshield when completed.

  Therefore, in the airbag apparatus for pedestrians according to the present invention, it is possible for the deformation stroke between the front windshield and the front windshield without increasing the volume of the bag body or separately using a strap which is connected to the vehicle side. The air bag which inflates by opening the gap can be simply configured.

  In this case, it is preferable that at least one of the left and right end sides be configured to be in contact with the lower vehicle-body-side portion to be able to be supported as the expansion completed shape of the bag body.

  In such a configuration, when the cover expansion portion that has completed the expansion receives the pedestrian, the vehicle body side in contact with at least one of the left and right end sides of the bag body that is in contact with the vehicle body side site immediately Since the reaction force from the portion can be secured, and the portion not in contact with the other vehicle body side portion on both left and right sides can also immediately contact the vehicle body side portion to secure the reaction force, the rear side of the cover expansion portion is front It is possible to stably secure deformation of the bag body (a deformation that reduces the curvature of the upward curve of the cover expansion portion) until it comes into contact with the windshield, thereby stabilizing the pedestrian's absorption of kinetic energy. Can.

  Of course, if the left and right end sides are both in contact with the lower side of the vehicle body as supportable shape as the expansion completed shape of the bag main body, the cover expansion portion immediately after the completion of the expansion is the vehicle side side Even if the pedestrian is supported on one side on the left side or on the other side on the right side and enters the side of the cover expansion part, both the above functions and effects are stabilized. Can be secured.

  Further, as the bag main body, an extending inflating portion extended so as to cover the upper side of each of the left and right front pillars of the vehicle is disposed on both left and right sides of the cover inflating portion. It is desirable to be configured.

  In such a configuration, the bag body includes the extended inflating portion covering the front pillar, and the extended inflating portion can protect a pedestrian heading for the front pillar. Furthermore, if the extended inflating portion disposed on the left and right sides of the cover inflating portion and disposed to extend rearward is supported by the front pillar, the support on the left and right sides of the cover inflating portion is extended in the longitudinal direction Stabilize by department. Therefore, even if the gap between the cover expansion portion and the front windshield is wide, the support from the vehicle body side portion on both left and right sides is stable, so the front window near the center in the left and right direction of the cover expansion portion when expansion is completed. It is also possible to widen the gap between it and the shield. Then, if the gap can be widely maintained, the bag body can increase the deformation stroke until the rear side of the cover expansion portion contacts the front windshield, and can absorb more kinetic energy of the pedestrian, which is preferable.

In another pedestrian airbag apparatus according to the present invention, a cover inflating portion capable of covering the upper part of the cowl on the front edge side of the front windshield of the vehicle at the completion of inflation with the inflating gas from the inflator being introduced. A pedestrian airbag apparatus comprising: an airbag configured to have:
The air bag includes a bag body having the cover expansion portion, and supplies inflation gas from the inflator to the bag body, and is connected to the vehicle side, the front side of the cover expansion portion And a gas inlet portion disposed below and in communication with the cover expansion portion.
The outer peripheral wall of the bag body is configured to include a pedestrian side wall portion disposed on the upper surface side and a vehicle body side wall portion disposed on the vehicle body side.
The gas inlet is
A fixed side disposed on the lower side, fixed to the vehicle side, and assembled with the inflator;
And a communication portion disposed on the upper side and capable of supplying expansion gas into the cover expansion portion on the front lower surface of the cover expansion portion, and connecting a peripheral edge on the upper edge side,
Between the fixed side portion and the communication portion, an expansion gas can be inserted, and a lower tether that connects the peripheral wall portions before and after the gas inflow portion is disposed.
The cover inflation portion causes inflation gas from the communication portion to flow into the cover inflation portion at a portion of the vehicle body side wall portion in an inner region of an annular joint portion which is a coupling portion with the upper edge side peripheral edge of the communication portion. It is constituted by arranging the communication opening,
The vertical dimension of the rear peripheral wall from the rear end of the lower tether to the rear edge of the annular joint in the front and rear peripheral walls of the communication portion of the gas inlet is the front end of the lower tether It is characterized by being set up larger than the length dimension of the up-and-down direction of the front peripheral wall part to the front edge of the above-mentioned annular joint part.

  In the pedestrian airbag apparatus according to the present invention, the communication portion on the upper side of the gas inflow portion communicated with the lower surface on the front side of the cover expansion portion is annularly connected from the rear end of the lower tether in the front and rear peripheral wall portions The vertical length of the rear peripheral wall to the rear edge of the part is set larger than the vertical length of the front peripheral wall from the front end of the lower tether to the front edge of the annular joint, As a result, if the communication portion completes the expansion, the rear edge side can be raised from the front edge side with respect to the annular joint portion which is a joint portion with the cover expansion portion by the support of the rear peripheral wall longer than the front peripheral wall. . In other words, the communication portion supports the portion of the communication opening portion surrounded by the annular joint portion provided in the vehicle body side wall portion of the cover expansion portion, that is, the state where the vehicle body side wall portion of the cover expansion portion is supported upward. In other words, it is possible to inflate the cover inflating portion while ensuring that the rear side of the cover inflating portion is lifted.

  Therefore, in the communication part for supplying the inflation gas to the cover expansion part between the fixed side part assembled with the inflator in the gas inflow part and the cover expansion part, the length of the front and rear peripheral wall parts above the lower tether The simple arrangement with the dimensions, simply long and short, makes it possible to lift the rear side of the cover expansion relative to the front side and to lift it off the front windshield.

  Furthermore, if the communication portion is coupled to the periphery of the communication opening of the cover expansion portion, the cover expansion portion is less likely to freely expand compared to the pedestrian side wall portion due to the coupling, and conversely, As the side wall of the pedestrian expands freely, the tension on the side of the side wall of the pedestrian surpasses the side of the side wall of the vehicle with respect to the tensile force acting along the left and right direction. It is easy to secure the shape. Therefore, regarding the cross-sectional shape along the left and right direction, as the cover expansion portion, the pedestrian side wall portion is freely expanded, and the shape near the left and right ends is easily expanded by expanding the center vicinity in the left and right direction upwards Can be secured.

  That is, the communication part for supplying the inflation gas to the cover expansion part is connected to the cover expansion part, and the length dimension of the peripheral wall part before and after the communication part is simply adjusted as described above. When the cover expansion portion completes the expansion, the left and right end sides are curved downward from the vicinity of the center in the left and right direction, and at least the area on the rear side is from the windshield. An air bag having a cover inflating portion that is shaped to have a gap that floats upward can be configured simply.

  Therefore, in the pedestrian airbag apparatus according to the present invention, the expansion gas is simply supplied to the cover inflating portion without increasing the volume of the bag body or separately using a strap that is connected to the vehicle side. To connect the cover to the cover expansion part and adjust the length dimension of the front and rear peripheral wall parts of the communication part to open a gap for a predetermined deformation stroke with the front windshield. An inflated air bag can be simply configured.

In this case, the cover expansion portion of the bag body is disposed in a band shape along the left-right direction at a position near the rear on the rear edge side of the annular coupling portion, and the thickness in the vertical direction when expansion of the cover expansion portion is completed The upper side tether which connects the said pedestrian side wall part and the said vehicle body side wall part is arrangeable so that regulation of height can be comprised,
In the outer peripheral wall of the cover expansion portion, the length dimension of the peripheral wall portion along the front-rear direction from the front edge of the annular joint to the connecting position with the upper end side of the upper tether is the back of the annular joint It is preferable that the length dimension of the peripheral wall portion of the cross section along the front-rear direction from the edge to the connection position with the lower end side of the upper tether be set larger.

  In such a configuration, the peripheral wall that freely expands in the free space at the front end of the cover expansion, that is, the peripheral wall of the front end of the cover expansion excluding the portion of the communication opening communicating with the gas inlet, The length dimension of the peripheral wall of the cross section along the longitudinal direction from the front edge of the annular joint to the connection position with the upper end of the upper tether, from the rear edge of the annular joint to the connection position with the lower end of the upper tether Since the length dimension of the peripheral wall portion of the cross section along the front and rear direction of the cover expansion portion is set larger, the angle by which the rear side is lifted can be suppressed compared to the front edge side of the cover expansion portion. However, with the upper tether, it is possible to ensure a shape in which the cover expansion portion extends in a plate shape on the rear side in a state in which the thickness dimension in the vertical direction is restricted as the expansion completed shape.

  Therefore, the thickness of the cover expansion portion at the completion of expansion can be regulated by the upper tether without narrowing the area covering the upper side of the front windshield, and can be extended in the form of a plate to the rear side. The angle of inclination of the edge side to the upper side can be regulated, and as a result, the cover expansion part secures a wide space (space) for the deformation stroke with the front windshield, without making the cover largely inclined upward and backward, and By suppressing the expansion of the volume, it is possible to ensure a plate-like shape that extends widely to the rear.

  Therefore, in such a configuration, a space for deformation stroke can be easily secured between the front windshield and the cover expansion portion while suppressing an increase in the volume of the cover expansion portion.

  Also in the pedestrian air bag device of this configuration, the bag body is extended so as to extend over the front pillars on the left and right sides of the vehicle so as to extend rearward on the left and right end sides of the cover expansion portion. It is desirable to arrange and arrange an extended expansion part.

  In such a configuration, as described above, the pedestrian can be protected from the front pillar, and a large deformation stroke amount of the bag body can be secured.

FIG. 1 is a schematic partial plan view of a vehicle equipped with a pedestrian airbag device according to an embodiment of the present invention. It is the schematic bottom view which developed the airbag used for the pedestrian airbag apparatus of embodiment. It is sectional drawing of the airbag of embodiment, and corresponds to the III-III site | part of FIG. It is a top view of the member which constitutes the air bag of an embodiment. It is a schematic longitudinal cross-sectional view which shows the completion | finish time of the action | operation of the pedestrian airbag apparatus of embodiment. It is a schematic plan view of the state which looked at diagonally front lower direction along the front windshield from the upper direction of the vehicle at the time of the completion of operation of the pedestrian airbag apparatus of embodiment, and is VI arrow directional view of FIG. It is the general | schematic fragmentary perspective view seen from the left front side of the vehicle at the time of the completion of the action | operation of the pedestrian airbag apparatus of embodiment.

  Hereinafter, an embodiment of the present invention will be described based on the drawings. The pedestrian airbag apparatus (hereinafter abbreviated as “airbag apparatus” as appropriate) M according to the embodiment is, as shown in FIGS. 1 and 5, the engine room ER side near the rear end 9a of the hood panel 9 of the vehicle V. And an inflator 15 for supplying an inflation gas to the air bag 29, and a case 10 for storing the air bag 29 folded.

  In the present specification, unless specified otherwise, the front and rear, upper and lower, and left and right directions will be described in agreement with the front, rear, upper and lower, and left and right directions of the vehicle V, respectively.

  Case 10 is made of metal (made of sheet metal) and is fixed to mounting portion 2 constituted by a flange or the like extending from a hood ridge reinforcement hose on the side of body 1 of vehicle V using a bolt, a nut, etc. There is. The case 10 has a rectangular parallelepiped box-like bottom wall portion 11 extending in the left-right direction of the vehicle V as a substantially rectangular box shape having an opening 13 for projecting the airbag 29 at the time of inflation upward; A substantially square cylindrical peripheral wall portion 12 extending upward from the outer peripheral edge of the bottom wall portion 11 is provided. The case 10 is mounted at an upper position on the front side of a cowl 6 which extends forward from below the front end 4 a side of a front windshield (also referred to as a windshield, hereinafter simply referred to as a windshield). Moreover, the member of the code | symbol 7 shown to FIG. 1, 5 is a wiper.

  Two inflators 15 are used in a cylindrical shape in which the axial direction is disposed along the left-right direction of the vehicle V. Each inflator 15 utilizes the mounting bracket 18 in a state in which the gas discharge portion 16 on the tip end side which discharges the inflation gas G is inserted into the air bag 29 with the gas discharge portion 16 directed to the outside of the vehicle V, respectively. It is fixed to the bottom wall 11 of the case 10.

  The mounting bracket 18 is configured to have a downwardly extending bolt 19 as an annular shape for holding the inflator 15. Each bolt 19 is inserted through the contact plate 22 and a later-described through-hole 63a of the air bag 29, penetrates the bottom wall portion 11 of the case 10, and is tightened with a nut 20. While fixing the inflator 15 to the bottom wall portion 11 of the case 10 and attaching the inflator 15 to the air bag, the fixed side portion 62 of the gas inflow portion 60 described later of the air bag 29 is attached to the case 10 and fixed. There is. Then, the air bag 29 is connected to the body 1 side of the vehicle V with the case 10 interposed by the mounting and fixing to the case 10.

  Incidentally, the contact plate 22 is made of metal, and is disposed in a substantially rectangular shape extending in the left-right direction so as to cover substantially the entire area directly below the two inflators 15.

  In the case of the embodiment, the front bumper 3 (see FIG. 7) of the vehicle V is provided with a sensor 3a capable of detecting a collision with a pedestrian, and a signal from the sensor 3a is input. An actuation circuit (not shown) is configured to actuate the inflator 15 of the airbag device M when detecting a collision of the vehicle V with a pedestrian based on a signal from the sensor 3a.

  As shown in FIGS. 1 to 3 and 5 to 7, the airbag 29 covers the upper part of the cowl 6 from the rear end 9 a of the hood panel 9 and the upper part of the left and right front pillars 5 (5 L, 5 R) when expansion is completed. A body 30 and a gas inlet 60 extending downward from the bag body 30 near the rear end 9 a of the hood panel 9 and fixed to the bottom wall 11 of the case 10 are configured. The bag body 30 is a cover expansion portion (also referred to as a cowl cover portion) capable of covering the upper part of the cowl 6 and the rear end 9a of the hood panel 9 on the front edge 4a side of the windshield 4 of the vehicle V Extended expansion portions (pillar cover portions that extend upward from the left and right front pillars 5L, 5R of the vehicle V by extending rearward from the left and right end portions 36, 37 of the horizontal cover portion 33 and the horizontal cover portion 33; And a vertical cover portion 43 (43L, 43R), and is configured in a substantially U-shape as viewed from above. Further, the gas inflow portion 60 serves as a portion for supplying the inflation gas G from the inflator 15 to the bag body 30, and is disposed below the front portion 34 side of the horizontal cover portion 33 to communicate with the horizontal cover portion 33. It is done.

  The bag body 30 includes, as the outer peripheral wall 31, a pedestrian side wall 31a in contact with a pedestrian on the upper surface side and a vehicle side wall 31b in contact with the body 1 on the lower surface side. The pedestrian side wall 31a and the vehicle body side wall 31b are, as shown in FIG. 4, composed of a pedestrian side base fabric 75 and a vehicle body side base fabric 76 having the same outer peripheral edge shape, and a suture thread The outer peripheral wall 31 is formed by joining the outer peripheries of each other by suturing using 73.

  These base cloths (materials) 75, 85, including base cloths 78, 82, 86 to 88, 90 to 92, which will be described later (see FIG. 4) It is formed of a coated cloth coated with a leakproof coating.

  An upper tether 45 connecting the pedestrian side wall 31a and the vehicle body side wall 31b is disposed in the horizontal cover 33 so as to be able to regulate the thickness in the vertical direction at the completion of the expansion of the horizontal cover 33. ing. The upper tether 45 is arranged in a band shape along the left-right direction slightly on the rear portion 35 side from the center in the front-rear direction of the horizontal cover portion 33. As shown in FIGS. 4 and 5, the upper tether 45 is composed of upper and lower base cloths 87 and 88 divided up and down, and one end side of each of the base cloths 87 and 88 is used as a pedestrian side base. The cloth 75 and the vehicle-side base cloth 76 are sewn at predetermined positions, and the other ends are sewn together.

  Further, the thickness in the vertical direction at the completion of expansion of the horizontal cover 33 and the vertical covers 43L and 43R can be regulated also near the intersections between the horizontal cover 33 and the vertical covers 43L and 43R on the left and right sides. Belt-like rear side tethers 47 (47L, 47R), front tethers 48 (48L, 48R), and intermediate tethers 49 (49L, 49R), which connect the pedestrian side wall 31a and the vehicle body side wall 31b, are disposed. ing. The rear tethers 47 (47L, 47R) are arranged symmetrically on both the left and right sides on the rear edge 30b side of the bag body 30, and are configured such that the inner edge 47a is located forward of the outer edge 47b. The front tethers 48 (48 L, 48 R) are symmetrically disposed on the left and right sides along the left and right direction on the front edge 30 a side of the bag body 30. The middle tethers 49 (49L, 49R) are disposed symmetrically on the left and right sides between the rear tethers 47 (47L, 47R) and the front tethers 48 (48L, 48R), and the rear tethers 47 (47L, 47R) are disposed. 47R), although the inclination angle from the direction along the left and right direction is made shallow, the inner edge 49a is arranged in front of the outer edge 49b.

  These tethers 47, 48, 49 are also respectively composed of the back side tether base fabric 90, the front side tether base fabric 91, and the intermediate tether base fabric 92 which are divided up and down. Then, one end side of each of the base fabrics 90 to 92 is sewn to a predetermined position of the pedestrian side base fabric 75 or the vehicle body side base fabric 76, and the other end sides are mutually sewn, and disposed. It is done.

  Further, in the horizontal cover portion 33, a communication opening 39 communicating with a communication portion 66 described later of the gas inflow portion 60 is disposed from the front portion 34 side of the central portion in the left-right direction. The communication opening 39 is a substantially rectangular area extending in the left-right direction, and the periphery thereof is sewn by using the entire periphery of the upper edge 67 a which becomes the substantially square cylindrical shape of the communication part 66 and the suture 73. It is combined. The bonding site is a substantially square annular coupling part 52, and in the vicinity of the left and right ends of the trailing edge 52b of the annular coupling part 52, the rear side tether 47, the front side tether 48, and the inner edges 47a, 48a, 49a of the middle tether 49. Are combined.

  In the communication opening 39, right and left long oval shaped openings 40 disposed at both left and right ends and five circular openings 41 disposed between the openings 40 and 40 are disposed.

  In the case of the embodiment, the horizontal cover portion 33 of the bag main body 30 has the expansion completed shape, with the left and right end portions 36 and 37 on the left and right vertical cover portions 43L and 43R side downward from near the center 33a in the left and right direction. In order to be arranged, it has a curved shape, and a region on the rear 35 side from the vicinity of the center 33 b in the front-rear direction is formed in a shape having a clearance OS which floats upward from the windshield 4. In the case of the embodiment, due to the curved shape of the horizontal cover portion 33, the vertical cover portions 43L and 43R at the left and right ends of the bag body 30 have the lower surface 43a side as the vehicle body side when the air bag 29 completes inflation. It is formed on the upper surface 5a side of the front pillars 5L, 5R so as to be in contact.

  The gap OS is generated between the upper surface 4b and the horizontal cover 33 in the direction orthogonal to the windshield 4. When the horizontal cover 33 receives a pedestrian, the space OS is formed of the horizontal cover 33. It is for securing a stroke for deforming the bag body 30 until substantially the whole area on the lower surface 33c side comes in contact with the upper surface 4b of the lower windshield 4, and there is a gap OS, the cushion of the bag body 30 is cushioned. The action is promoted to preferably absorb the pedestrian's kinetic energy.

  Further, in the case of the embodiment, the horizontal cover portion 33 at the completion of expansion floats up from the windshield 4 over the entire area in the front-rear direction at the center 33a in the left-right direction, and a gap OS is provided below it.

  The gas inflow portion 60 is configured as a substantially square cylindrical shape extending downward from the annular joint portion 52. The outer peripheral wall 61 of the gas inlet 60 is in contact with the bottom wall 11 of the case 10 when it is fixed to the case 10, and the bottom wall 61a is fixed when the airbag 29 is completely inflated. And a side wall 61 b extending from the peripheral edge into a substantially square cylindrical shape and connected to the annular joint portion 52.

  Further, the gas inflow portion 60 is configured to be divided up and down by the lower tether 71 disposed inside, and the fixed side portion 62 disposed on the lower side of the lower tether 71, and the lower tether And a communicating portion 66 disposed on the upper side of the portion 71. The fixed side portion 62 includes a bottom wall portion 63 constituting the above-described bottom wall 61a that abuts on the bottom wall portion 11 of the case 10, and a substantially square cylindrical peripheral wall extending upward from the outer peripheral edge of the bottom wall portion 63. A unit 64 is configured. The bottom wall portion 63 is formed with a through hole 63 a through which the bolt 19 of each mounting bracket 18 is inserted. Although the peripheral wall portion 64 is configured to project the rear side portion 64 b upward from the rear upper edge 12 b of the peripheral wall portion 12 of the case 10, the front side portion 64 a is equivalent to the front upper edge 12 a of the peripheral wall portion 12 of the case 10 It is configured to be arranged at the height position.

  In other words, the lower tether 71 arranges the front end 71a near the front upper edge 12a of the peripheral wall 12 of the case 10 and the rear end 71b above the rear upper edge 12b of the peripheral wall 12 of the case 10 It will be

  As shown in FIGS. 2 and 4, the lower tether 71 has a band shape extending in the left-right direction, and the width dimension W1 in the left-right direction is equal to the width in the left-right direction of the inner peripheral side of the fixed side portion 62 of the gas inflow portion 60. The insertion openings 65 through which the inflation gas is inserted can be disposed on the left and right sides of the lower tether 71 in the fixed side portion 62 so as to be smaller than the dimension W0. The lower tether 71 is also provided with an oval opening 71 c extending in the left-right direction.

  The communication portion 66 is a portion on the upper side of the lower tether 71, and the entire circumference of the upper edge 67a is formed on the periphery of the communication opening 39 of the front portion 34 of the horizontal cover portion 33 using the annular joint portion 52. When the air bag 29 is completely inflated, the air bag 29 projects upward of the case 10 and communicates with the front 34 side of the side cover 33. That is, the inflation gas G discharged from the gas discharge portion 16 of the inflator 15 flows from the fixed side portion 62 into the communication portion 66 through the insertion openings 65 and 65 and the openings 71 c on the left and right sides of the lower tether 71. And flows from the communication portion 66 through the openings 40 and 41 of the communication opening 39 to the front 34 side of the horizontal cover portion 33.

  Further, the communication portion 66 is a portion from the rear end 71 b of the lower tether 71 to the rear edge 62 b of the annular joint portion 52 in the front and rear peripheral wall 68 and the rear peripheral wall 69 in the substantially square cylindrical peripheral portion 67. The vertical dimension L2 of the circumferential wall 69 is set larger than the vertical dimension L1 of the front circumferential wall 68 from the front end 71a of the lower tether 71 to the front edge 52a of the annular joint 52. (See Figure 5).

  Further, in the case of the embodiment, the gas inflow portion 60 has predetermined peripheral edges (side edges) 79c, 80a, and the two front and rear front base cloths 78 shown in FIG. 83c and 84a are sewn together with the suture thread 73, and at the same time, predetermined upper edges of the gas inflow front base cloth 78 and the gas inflow rear base cloth 82 (upper rim 79a, 83a or upper horizontal rim 79b, 83b) are configured to be coupled to the lateral cover portion 33 so as to form an annular coupling portion 52.

  The front base cloth 78 for gas inflow has a substantially rectangular plate-like wide portion 79 for widening the width dimension in the left and right direction, and a width detail 80 d extending from the center in the left and right direction of the wide portion 79 And are formed in a T-shape. The rear base fabric 82 for gas inflow also has a wide portion 83 of a substantially rectangular plate shape that widens the width dimension in the left and right direction, and a width detail that extends from the center in the left and right direction of the wide portion 83 And 84 are formed in a T shape.

  Then, when forming (manufacturing) the gas inflow portion 60, first, the front and rear ends (the front end 71a and the rear end 71b of the lower tether 71 are formed) of the lower tether base fabric 86 constituting the lower tether 71. Are sewn to predetermined positions of the front side base cloth 78 and the rear side base cloth 82, and the front side base cloth 78 and the rear side base cloth 82 are overlapped. Then, the left and right side edges 80a, 84a of the overlapped narrow portions 80, 84 and the outer peripheral edges (lower edges) 79c, 83c of the wide portions 79, 83 connected to the side edges 80a, 84a are sutures. Stitch using 73. Then, the wide portions 79, 83 of the front base cloth 78 and the rear base cloth 82 are opened, and the peripheral edge of the communication opening 39 on the lower surface side of the front portion 34 of the horizontal cover 33, that is, the vehicle body side wall 31b. The left and right upper lateral edges 79b, 83b of the wide portions 79, 83 open to the corresponding positions of the vehicle body side base fabric 76 constituting the left edge 52c and the right edge 52d of the annular joint portion 52. It is sewn to the vehicle body side base fabric 76 so as to form, and further, the upper edges 79a, 83a of the open wide portions 79, 83 are formed so as to form the front edge 52a and the rear edge 52b of the annular joint portion 52. The gas inflow portion 60 connected to the horizontal cover portion 32 can be formed by stitching on the vehicle body side base cloth 76.

  In the case of forming the air bag 29, after forming the gas inflow portion 60 as described above, one end side of each of the tether cloths 87, 88, 90, 91, 92 is used for the pedestrian side. The base fabric 75 and the vehicle-side base fabric 76 are sewn to predetermined positions, and the other ends of the tether cloths 87, 88, 90, 91, 92 are sewn together, and the vehicle-side base fabric 76 is overlapped The air bag 29 can be formed by sewing the outer peripheral edges of the pedestrian side base fabric 75 with each other.

  The formed airbag 29 has the portion of the bag body 30 before and after the gas inflow portion 60 in a state in which the pedestrian side wall portion 31a and the vehicle body side wall portion 31b of the bag body 30 are spread flat. Of the horizontal cover portion 33 by folding the portions of the vertical cover portions 43L and 43R on the left and right edge sides so as to make the width dimension in the left-right direction that can be stored in the case 10; Next, the inflators 15 and 15 in a state in which the mounting bracket 18 is assembled are inserted into the gas inflow portion 60 while being mounted on both the left and right sides and then inserting the contact plate 22 into the gas inflow portion 60. Each bolt 19 extending from 18 is inserted into the contact plate 22 and each through hole 63a of the gas inflow portion 60 to project out of the air bag 29, and a tape material for preventing the air bag 29 from collapsing, If Tsutsume the airbag 29, it is possible to form the airbag assembly body.

  In the gas inflow portion 60, the narrow portions 80 where the front base cloth 78 and the rear base cloth 82 on the lower edge side of the front side 64a and the rear side 64b of the fixed side 62 are not mutually sewn together. The lower edges 80b and 84b of the lower and upper edges 84b and 84b are stacked one on top of the other, and the bolt 19 is inserted through the through hole 63a provided in that portion.

  Then, while making each bolt 19 project from the bottom wall portion 11, the air bag assembly is housed in the case 10, and a nut 20 is fastened to each bolt 19 to make the air bag 29 and the inflator 15 the case 10. And a cover (not shown) covering the opening 13 of the case 10 is mounted on the case 10 with the expansion of the air bag 29 capable of projecting, enabling the inflator 15 to receive an operation signal. The pedestrian airbag apparatus M can be mounted on the vehicle V by mounting and fixing the case 10 to the mounting portion 2 on the body 1 side while connecting wires.

  After the pedestrian air bag device M is mounted on the vehicle V, when the inflator 15 is activated, the gas inflow portion 60 is expanded by the inflation gas G discharged from the gas discharge portion 16 of the inflator 15, and After passing through the communication part 66 of the gas inflow part 60, the bag body 30 into which the inflation gas G is introduced inflates the horizontal cover part 33 and the left and right vertical cover parts 43L, 43R. Therefore, the horizontal cover portion 33 which completes the expansion covers the upper side of the front edge 4a side of the windshield 4 from the cowl 6 in front of the windshield 4 of the vehicle V, and the vertical cover portion 43L which completes the expansion. 43R covers the upper surface 5a side of the left and right front pillars 5L and 5R of the vehicle V.

  In the air bag 29 at the completion of the expansion, the communication part 66 on the upper side of the gas inflow part 60 communicated with the lower surface of the front side 34 of the horizontal cover part 33 The vertical dimension L2 of the rear circumferential wall 69 from the rear end 71b to the rear edge 52b of the annular joint 52 which is the joint portion with the horizontal cover 33 is set from the front end 71a of the lower tether 71 to the annular joint It is set larger than the length dimension L1 of the up-down direction of the front peripheral wall 68 to the front edge 52a of 52. Therefore, when the communication portion 66 completes the expansion, the rear edge 69a which is longer than the front circumferential wall 68 supports the annular joint portion 52 which is a joint portion with the horizontal cover portion 33. 52b side can be raised. In other words, the communication portion 66 supports the portion of the communication opening 39 surrounded by the annular joint portion 52 provided in the vehicle body side wall 31b of the horizontal cover portion 33 in a backward manner, in other words, the horizontal cover portion A state in which the rear portion 35 side of 33 is lifted can be ensured, and the horizontal cover portion 33 can be expanded.

  Therefore, in the communication portion 66 for supplying the inflation gas G to the horizontal cover portion 33 between the fixed side portion 62 assembled with the inflator 15 of the gas inflow portion 60 and the horizontal cover portion 33, the upper side of the lower tether 71 The rear cover 35 side of the horizontal cover 33 is compared with the front 34 side by a simple configuration in which long and short (L1 <L2) are simply provided to the length dimensions L1 and L2 of the front and rear peripheral wall portions 68 and 69, respectively. It is possible to raise it and lift it from the windshield 4.

  Furthermore, in the airbag 29 according to the embodiment, when the communication portion 66 is coupled to the periphery of the communication opening 39 of the horizontal cover portion 33 by the annular joint portion 52, the horizontal cover portion 33 is coupled to the vehicle body. The side wall 31b is less likely to expand freely than the pedestrian side wall 31a, and conversely, with regard to the tension that the pedestrian side wall 31a expands freely and tries to expand in the left-right direction, the vehicle body side wall The tension on the pedestrian side wall 31a side is better than that on the 31b side (see FIG. 6), and the lateral cover portion 33 can easily ensure the shape of the upper swelling. Therefore, regarding the cross-sectional shape along the left and right direction, as the side cover portion 33, the pedestrian side wall portion 31a freely expands to expand the vicinity of the center 33a in the left and right direction upward, and the vertical cover of the left and right end portions 36, 37 It is possible to easily secure the shape in which the portions 43L and 43R are disposed downward.

  That is, the communication portion 66 for supplying the inflation gas G to the horizontal cover portion 33 is simply connected to the horizontal cover portion 33, and the length dimensions L1, L2 of the peripheral wall portions 68, 68 before and after the communication portion 66 are connected. When the horizontal cover portion 33 completes the expansion only by adjusting the left and right end portions on the left and right vertical cover portions 43L and 43R side from the vicinity of the center 33a in the horizontal direction as shown in FIGS. 36 and 37 have a curved shape so as to arrange them on the lower side, and further have a shape having a clearance OS that floats the area on the rear 35 side at least from the vicinity of the center 33a in the front and rear direction upward from the windshield 4 The airbag 29 having the side cover portion 33 can be simply configured.

  Then, when the side cover portion 33 of the airbag 29 at the completion of the expansion receives the pedestrian, until the rear portion 35 side of the side cover portion 33 which has floated from the windshield 4 descends so as to contact the windshield 4 The vertical cover portions 43L, 43R positioned below the vicinity of the center 33a in the left-right direction of the horizontal cover portion 33 abut against and support the left and right front pillars 5L, 5R to deform the bag body 30, , Can absorb the pedestrian's kinetic energy. Thereafter, if the rear portion 35 side of the horizontal cover 33 floated from the windshield 4 comes into contact with the windshield 4 (see the two-dot chain line in FIG. 5), the cushioning action is exerted to raise the internal pressure of the horizontal cover 33 Can properly receive pedestrians.

  Therefore, in the airbag apparatus M for pedestrians of the embodiment, the lateral cover portion 33 of the bag body 30 is extended rearward from the part floated from the windshield 4 so as to contact the windshield 4 with a large volume. Or, without providing a strap on the lower surface 33c side of the horizontal cover portion 33, as a configuration of the horizontal cover portion 33, the rear portion 35 side is floated from the windshield 4 and the left and right end portions 36, 37 are lowered. In addition, it is possible to obtain a configuration in which a gap (space) OS for a predetermined deformation stroke can be secured between the windshield 4 and the windshield 4 when expansion is completed, simply by curving.

  Therefore, in the pedestrian airbag apparatus M according to the embodiment, the deformation stroke between the airbag 4 and the windshield 4 is avoided without using a strap that increases the volume of the bag body 30 or is separately connected to the vehicle side. The air bag 29 inflating by opening the gap OS can be configured simply.

  In the embodiment, as the inflation completed shape of the bag body 30, both of the vertical cover portions 43L and 43R on the left and right end portions 36 and 37 side are in contact with the front pillars 5L and 5R as the lower vehicle body side portions to support It is configured to be possible.

  Therefore, in the embodiment, when the horizontal cover portion 33 that has completed the expansion receives the pedestrian, the front cover 5L, 4R in contact with the front pillars 5L, 5R of the vehicle V is immediately in contact with the front cover Since the reaction force from the pillars 5L and 5R can be secured, the deformation of the bag body 30 (the curvature of the upward bending state of the horizontal cover 33 is reduced until the rear 35 side of the horizontal cover 33 contacts the windshield 4) (6) can stably ensure the absorption of kinetic energy of the pedestrian.

  Note that at the completion of the inflation of the airbag 29, at least one of the vertical cover portions 43L, 43R on the left and right end portions 36, 37 may be configured to ensure a reaction force from the front pillar 5. That is, if the horizontal cover portion 33 receives and lowers the pedestrian, the vertical cover portion on the other end side where the left and right end portions are not in contact can immediately contact the front pillar and secure the reaction force. It is. Then, if the horizontal cover portion 33 receives and lowers the pedestrian, the vertical cover portions 43L and 43R on the left and right end portions 36 and 37 can secure a reaction force from the front pillars 5L and 5R, so for example, an airbag When the horizontal cover portion 33 after the completion of the expansion of 29 receives the pedestrian and descends, the vertical cover portions 43L, 43R on both the left and right end portions 36, 37 side quickly to the front pillars 5L, 5R as vehicle body side portions. If supported, the vertical cover portions 43L, 43R on the left and right end portions 36, 37 may not be in contact with the front pillars 5L, 5R when the inflation of the airbag 29 is completed.

  However, as in the embodiment, both of the vertical cover portions 43L and 43R on the left and right end portions 36 and 37 side correspond to the front pillars 5L and 5R as lower vehicle body side portions as the expansion completed shape of the bag body 30. If it is configured to be in contact and supported, the lateral cover 33 is supported by the left and right vertical cover portions 43L and 43R immediately after the completion of the expansion, and the pedestrian is on the left side, Alternatively, both of the above actions and effects can be stably secured even if one side approaches the other side of the right side and enters the side of the horizontal cover portion 33.

  The vertical cover portions 43L and 43R of the embodiment are configured to be supported not only on the front pillars 5L and 5R but also on the windshield 4 as a vehicle body side portion, and the horizontal cover portion 33 at the time of pedestrian reception is A deformation that increases the curvature can be secured more stably.

  Further, in the embodiment, the bag body 30 extends rearward so as to cover the upper portions of the left and right front pillars 5L and 5R of the vehicle on the left and right end portions 36 and 37 sides of the horizontal cover portion 33 as the cover expansion portion. The vertical cover portions 43L and 43R are provided as extending extending inflating portions.

  Therefore, in the embodiment, the bag body 30 includes the vertical cover portions 43L and 43R that cover the front pillars 5L and 5R, and protects the pedestrians facing the front pillars 5L and 5R by the vertical cover portions 43L and 43R. Can.

  Further, if the vertical cover portions 43L, 43R disposed on the left and right end portions 36, 37 of the horizontal cover portion 33 and extending rearward are supported by the front pillars 5L, 5R, the horizontal cover portion 33 is formed. The support on the left and right end portions 36, 37 side is stabilized by the longitudinal cover portions 43L, 43R long back and forth. Therefore, even if the horizontal cover portion 33 widens the gap OS with the windshield 4, the support from the front pillars 5L and 5R as the vehicle-body-side portions on the left and right end portions 36 and 37 side is stable, so expansion is completed It is also possible to widen the gap OS with the windshield 4 in the vicinity of the center 33a in the left-right direction of the side cover portion 33 at that time. Then, if the gap OS can be secured widely, the bag body 30 can enlarge the deformation stroke until the rear 35 side of the side cover portion 33 contacts the windshield 4 and can absorb more kinetic energy of the pedestrian, It becomes suitable.

  Incidentally, if the above points are taken into consideration, the horizontal cover portion 33 as the cover expansion portion is covered above the cowl 6 without providing the vertical cover portions 43L and 43R as the extension expansion portions, and the left-right direction To cover the vicinity of the lower ends of the front pillars 5L and 5R and the upper side of the fender panel 8. When the inflation is completed, the bag body 30 has the left and right end portions 36 and 37 near the lower end of the left and right front pillars 5 (5L and 5R) as the vehicle body side portion and the left and right fender panels 8 (8L and 8R), Alternatively, it may be configured to be supported by the windshield 4.

  Furthermore, in the airbag 29 according to the embodiment, the lateral cover portion 33 of the bag body 30 is disposed in the shape of a band along the left-right direction at the rear vicinity position on the rear edge 52b side of the annular coupling portion 52. An upper tether 45 for connecting the pedestrian side wall 31a and the vehicle body side wall 31b is disposed so as to be able to regulate the thickness in the vertical direction at the completion of the expansion 33. Then, on the outer peripheral wall of the horizontal cover portion 33, the length dimension L3 of the front peripheral wall portion 34b along the longitudinal direction from the front edge 52a of the annular joint portion 52 to the connecting position with the upper end 45a side of the upper tether 45 The length is set larger than the length dimension L4 of the rear peripheral wall 34c of the cross section along the front-rear direction from the rear edge 52b of the annular joint portion 52 to the connection position with the lower end 45b of the upper tether 45 (see FIG. 5) ).

  In such a configuration, with respect to the peripheral wall portions 34b and 34c freely expanding in free space in the front end portion 34a of the horizontal cover portion 33, that is, the horizontal cover portion 33 excluding the communication opening 39 communicating with the gas inflow portion 60. In the front peripheral wall 34b and the rear peripheral wall 34c of the front end 34a, the front peripheral wall 34b of a cross section along the longitudinal direction from the front edge 52a of the annular joint 52 to the connecting position with the upper end 45a of the upper tether 45 Is set larger than the length L4 of the rear peripheral wall 34c of the cross section along the front-rear direction from the rear edge 52b of the annular joint 52 to the connection position with the lower end 45b of the upper tether 45 Because of this, the angle by which the rear portion 35 side is lifted as compared to the front edge 33 d side of the horizontal cover portion 33 is suppressed. However, with the upper tether 45, it is possible to ensure that the horizontal cover portion 33 extends in a plate shape on the rear side in a state in which the thickness dimension in the vertical direction is restricted as the expansion completed shape.

  Therefore, the thickness of the side cover 33 at the completion of expansion can be restricted by the upper tether 45 without narrowing the area covering the upper side of the windshield 4 and can be extended as a plate to the rear side, , The inclination angle to the upper side of the rear edge 33e side can be regulated, and as a result, the space (space) OS for the deformation stroke with the windshield 4 without making the side cover part 33 largely inclined backward and upward Can be secured widely, and expansion of the volume can be suppressed to ensure a plate-like shape that is widely extended rearward.

  Therefore, in such a configuration, it is possible to easily secure the space OS for the deformation stroke between the windshield 4 and the vehicle while suppressing an increase in the volume of the horizontal cover portion 33.

  As the longitudinal cross-section structure of the air bag 29, the portion of the communication opening portion 39 of the horizontal cover portion 33 includes the front inflating portion at the front portion of the communication portion 66 of the gas inflow portion 60 and the upper tether 45 of the horizontal cover portion 33; The front edge 52a and the rear edge 52b of the annular joint portion 52 are configured like a tether that regulates and separates the mutual separation distance, and the front and rear peripheral wall portions of the outer peripheral wall of the air bag 29 It can also be said that it is a front and rear tether connecting the front peripheral wall portion 68 and the rear peripheral wall portion 69).

  Then, in the airbag 29 of the embodiment, in order to lift the rear portion 35 side of the horizontal cover portion 33 from the windshield 4, the connection position of the front and rear end portions 71a and 71b of the lower tether 71 is adjusted to flow the gas. In the peripheral wall portions 68 and 69 in the communication portion 66 of the portion 60, the vertical dimension L2 of the rear peripheral wall portion 69 from the rear end 71b of the lower tether 71 to the rear edge 52b of the annular joint portion 52 is The gap OS is set to be larger than the vertical dimension L1 of the front peripheral wall 68 from the front end 71a of the side tether 71 to the front edge 52a of the annular joint 52. Therefore, the gap OS can be further increased by adjusting the connecting position of the front and rear end portions 71a and 71b of the lower tether 71 to increase the difference between the length dimensions L1 and L2, and the rear portion of the horizontal cover portion 33 The angle by which the 35 side is lifted from the windshield 4 can be increased, and conversely, the gap OS can be reduced by reducing the difference between the length dimensions L1 and L2, and the rear 35 side of the horizontal cover portion 33 can be removed from the windshield 4 It is possible to reduce the angle of lifting, and to lift the whole of the horizontal cover 33 from the windshield 4 or to lift a part of the rear portion 35 from the windshield 4.

  Of course, the horizontal cover portion is cut in three dimensions without the length adjustment of the front and rear peripheral wall portions 68 and 69 in the communication portion 66 of the gas inflow portion 60 using the lower tether 71. The rear 35 side of the rear cover 33 or the entire side cover 33 may be configured to be lifted from the windshield 4.

  Further, by adjusting the lengths of the front and rear peripheral wall portions 68 and 69 in the communication portion 66 of the gas inflow portion 60 using the lower tether 71, it is possible to secure the deformation stroke when the horizontal cover portion 33 receives a pedestrian. When the air bag 29 is allowed to rise from the windshield 4 and the volume of the air bag 29 is allowed to increase, the rear cover 35 side of the side cover 33 is elongated while the gap OS is maintained, and the side cover 33 is formed. The rear edge 33 e side of the may be supported in contact with the windshield 4.

  Of course, even if it is extended in this manner, a plurality of (two, three, etc.) upper tethers 45 along the left-right direction are juxtaposed so as to regulate the thickness of the horizontal cover 33 when inflated. Then, the increase in volume can be suppressed.

  Further, in the pedestrian airbag apparatus M of the embodiment, the airbag 29 is inflated without using the hood flip-up device for raising the rear end of the hood panel 9 at the time of operation. If the space between the rear end 9a and the cowl 6 is narrow, the hood flip-up device is also used in conjunction with the hood flip-up device to activate the hood flip-up device when the pedestrian airbag device M is activated. The air bag 29 may be configured so as to cover the upper surface 5a of the cowl 6 and the front pillars 5L and 5R by inflating the air bag 29 from between the rear end 9a of the vehicle and the cowl 6.

4 (car body side part) front windshield, 5 (5L, 5R) (car body side part) front pillar, 6 cowl 8 (8L, 8R) (car body side part) fender panel, 15 inflator, 29 ... Air bag, 30 ... Bag body, 31 a ... Pedestrian side wall portion, 31 b ... Car body side wall portion, 33 ... (cover expansion portion) horizontal cover portion, 34 ... front portion, 35 ... rear portion, 39 ... Communication opening portion, 43 ( 43L, 43R) ... (Extended expansion part) vertical cover part, 45 ... upper tether, upper end 45a ... lower end, 52 ... annular joint, 52a ... front edge, 52b ... rear edge, 60 ... gas inflow part, 62: fixed side portion, 66: communication portion, 68: front peripheral wall portion, 69: rear peripheral wall portion, 71: lower tether, 71a: front end, 71b: rear end,
G: expansion gas, OS: gap, L1: length dimension of the front peripheral wall portion in the vertical direction, L2: length dimension of the rear peripheral wall portion, L3: (the front peripheral wall portion of the horizontal cover portion Longitudinal dimension of L, L4 ... (longitudinal direction of rear peripheral wall portion of horizontal cover portion), V ... vehicle, M ... airbag device for pedestrian.

Claims (6)

Pedestrian air provided with a cover inflating portion having a cover inflating portion capable of covering the upper side of the cowl on the front edge side of the front windshield of the vehicle at the completion of inflating with the inflating gas from the inflator. A bag device,
The air bag includes a bag body having the cover expansion portion, and supplies inflation gas from the inflator to the bag body, and is connected to the vehicle side, the front side of the cover expansion portion And a gas inlet portion disposed below and in communication with the cover expansion portion.
The cover inflating portion has an expansion completed shape,
It has a curved shape so that the left and right end sides are disposed lower than near the center in the left-right direction,
A pedestrian airbag apparatus, wherein at least a rear side area is configured to have a gap that floats upward from the front windshield.   The pedestrian air bag device according to claim 1, wherein at least one of the left and right end sides of the bag body is configured to be in contact with and supported by the lower vehicle body side portion as the expansion completed shape of the bag body.   The bag body is configured to have an extending inflating portion extended on the left and right sides of the cover inflating portion so as to cover the upper portions of the left and right front pillars of the vehicle. The pedestrian air bag device according to claim 1 or 2, characterized in that: Pedestrian air provided with a cover inflating portion having a cover inflating portion capable of covering the upper side of the cowl on the front edge side of the front windshield of the vehicle at the completion of inflating with the inflating gas from the inflator. A bag device,
The air bag includes a bag body having the cover expansion portion, and supplies inflation gas from the inflator to the bag body, and is connected to the vehicle side, the front side of the cover expansion portion And a gas inlet portion disposed below and in communication with the cover expansion portion.
The outer peripheral wall of the bag body is configured to include a pedestrian side wall portion disposed on the upper surface side and a vehicle body side wall portion disposed on the vehicle body side.
The gas inlet is
A fixed side disposed on the lower side, fixed to the vehicle side, and assembled with the inflator;
And a communication portion disposed on the upper side and capable of supplying expansion gas into the cover expansion portion on the front lower surface of the cover expansion portion, and connecting a peripheral edge on the upper edge side,
Between the fixed side portion and the communication portion, an expansion gas can be inserted, and a lower tether that connects the peripheral wall portions before and after the gas inflow portion is disposed.
The cover inflation portion causes inflation gas from the communication portion to flow into the cover inflation portion at a portion of the vehicle body side wall portion in an inner region of an annular joint portion which is a coupling portion with the upper edge side peripheral edge of the communication portion. It is constituted by arranging the communication opening,
The vertical dimension of the rear peripheral wall from the rear end of the lower tether to the rear edge of the annular joint in the front and rear peripheral walls of the communication portion of the gas inlet is the front end of the lower tether A pedestrian airbag device characterized in that it is set larger than the length dimension of the front peripheral wall portion from the upper to the front edge of the annular joint portion in the vertical direction. The cover expansion portion of the bag body is disposed in a band shape along the left-right direction at a position near the rear on the rear edge side of the annular joint, and restricts the vertical thickness of the cover expansion portion when expansion is completed. Possibly, an upper tether connecting the pedestrian side wall and the vehicle body side wall is disposed.
In the outer peripheral wall of the cover expansion portion, the length dimension of the peripheral wall portion along the front-rear direction from the front edge of the annular joint to the connecting position with the upper end side of the upper tether is the back of the annular joint The pedestrian airbag according to claim 4, characterized in that it is set larger than the length dimension of the peripheral wall portion of the cross section along the longitudinal direction from the edge to the connecting position with the lower end side of the upper tether. apparatus.   The bag body is configured to have an extending inflating portion extended on the left and right sides of the cover inflating portion so as to cover the upper portions of the left and right front pillars of the vehicle. The pedestrian airbag apparatus according to claim 4 or 5, characterized in that:

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