CN108657109B - Head-protecting airbag device - Google Patents

Abstract

The case that houses the folded body has an assembled portion on the upper side, and the assembled portion can assemble the assembling portion of the winding tape wound around the folded body. The assembling portion is provided with a claw piece portion at the front end side of the locking shaft portion. The assembled part has: an assembly recess into which the assembly portion is inserted; an assembly convex part for clamping the claw part; and an upper wall portion that covers an upper side of the assembly portion. The upper wall portion has: a vehicle outside portion that projects the assembly projection; and a vehicle interior portion arranged in a stepped manner so as to be located above the vehicle exterior portion. The vehicle interior region is configured to be separated from the vehicle exterior region, and can suppress deformation of the vehicle exterior region when a pulling force to the vehicle interior side that attempts to pull out the assembly portion from the assembly portion acts on the assembly portion.

Description

Head-protecting airbag device

Technical Field

The present invention relates to a head protection airbag device having a structure in which an airbag covering a window of a vehicle is folded at the time of deployment and inflation and is accommodated in a synthetic resin case and mounted on the vehicle.

Background

Conventionally, as a head protecting airbag device having a structure in which a folded body having an airbag folded is housed in a case and mounted on a vehicle, there is a structure in which a synthetic resin winding tape is wound around the folded body to prevent folding deformation of the folded body, and an assembly portion formed on the winding tape is assembled with an assembly portion formed on the case, thereby mounting the folded body on the case, as in japanese patent laid-open publication No. 2016-190567.

However, in this conventional head protecting airbag device, since the assembly recess portion constituting the assembled portion in the case is formed by removing a part of a portion of the case covering a region of a thick portion from the upper side of the folded body to the vehicle exterior side, the assembly recess portion has an assembly strength capable of maintaining the assembled state of the assembled portion and the assembled portion even when a pulling force is applied to the winding band downward in the vehicle interior side during the expansion and expansion of the airbag. However, in contrast, in the assembly work of assembling the assembly portion to the assembled portion, the assembly portion needs to be strongly press-fitted into the assembly recess, and there is room for improvement in that the assembly work is easy.

Disclosure of Invention

An object of the present invention is to solve the above-described problems and to provide a head protecting airbag device that is easy to attach to a case and can securely attach a winding band to the case.

The object of the present invention can be achieved by a head-protecting airbag device having the following configuration.

A head-protecting airbag device is configured to include:

an airbag configured to cover a window of a vehicle when inflation is completed, and folded and housed on an upper edge side of an inside of the window;

a synthetic resin case that houses a folded body of the airbag folded so that a lower edge side at the time of completion of inflation approaches an upper edge side; and

a winding band made of flexible synthetic resin, capable of releasing winding when the airbag is expanded and expanded, wound around the folded body for preventing folding deformation, and having an assembling portion assembled to the housing side,

the head protecting airbag device is configured in such a manner that the housing has an assembled portion capable of assembling the assembled portion on the upper side of a housing portion in which the folded body is housed,

the head-protecting airbag apparatus is characterized in that,

the housing and the winding band are both made of thermoplastic elastomer,

the assembly part has: a locking shaft portion protruding toward the vehicle exterior side; and a claw piece portion which is formed to be flexible, is formed to be inverted from a front end side of the locking shaft portion on at least an upper surface side of the locking shaft portion, and is separated from the locking shaft portion,

the assembled part is configured to have:

an assembly recess into which the assembly portion is inserted;

an assembly convex part which is formed on the ceiling surface side in the inner side of the assembly concave part, locks the inserted claw piece part and assembles the assembly part to the assembled part; and

an upper wall portion covering an upper side of the assembly portion inserted into the assembly recess,

the upper wall portion is configured to have: a vehicle exterior portion that projects the assembly projection on a lower surface side; and a vehicle interior portion arranged in a stepped manner such that a vehicle interior side of the vehicle exterior portion is located above the vehicle exterior portion,

the position of the inner side of the vehicle,

is configured to be separated from the part of the vehicle outer side part provided with the assembling convex part in a mode of realizing the upward deformation of the vehicle outer side part when the assembling part is inserted, and is also configured

When a pulling force to the vehicle interior side that attempts to pull out the assembly unit from the assembly unit acts on the assembly unit, deformation of the vehicle exterior side portion that is displaced toward the vehicle interior side and flexes upward is suppressed, and the vehicle exterior side end portion is disposed above the vehicle interior side end portion of the vehicle exterior side portion and is disposed on the vehicle exterior side relative to the vehicle interior side end portion.

In the head-protecting airbag device of the present invention, the vehicle exterior region of the upper wall portion having the assembly convex portion is disposed apart from the vehicle interior region of the upper wall portion and is offset toward the vehicle exterior side, and therefore, when the assembly portion is inserted into the assembly concave portion, only the vehicle exterior region can be deformed to be flexed upward by itself, and the assembly portion can be assembled to the assembled portion with a small force as compared with the conventional head-protecting airbag device. Further, when a pulling force to the inside of the vehicle, which attempts to pull out the assembled unit from the assembled unit, acts on the assembled unit, a portion around the assembled unit in the case deforms such that the outside portion is displaced a small amount toward the inside of the vehicle, and at this time, the inside portion disposed on the inside of the vehicle at the outside of the vehicle is configured such that the outside end portion is disposed above the inside end portion of the outside portion and is disposed on the outside of the vehicle relative to the inside end portion, and deformation of the outside portion displaced toward the inside of the vehicle and deflected upward is suppressed. Therefore, when the winding of the winding tape is released at the time of deployment and inflation of the airbag and the airbag is pulled downward as it inflates, the deformation of the vehicle exterior side portion having the assembly convex portion that is engaged with the claw piece portion of the assembly portion can be suppressed upward by the vehicle interior side portion, and therefore, it is possible to reliably prevent the engagement state between the claw piece portion formed on the upper surface side of the engagement shaft portion in the assembly portion and the assembly convex portion formed inside the assembly concave portion from being released.

Therefore, in the head-protecting airbag device of the present invention, the attachment work to the case is easy, and the winding band can be firmly attached to the case.

In the head-protecting airbag device of the present invention, if the vertical wall portions are disposed at the front and rear end sides of the vehicle exterior portion and are disposed so as to extend downward to be continuous with the assembled portion side so as to cover the front and rear sides of the locking shaft portion, the vehicle exterior portion is stably supported by the vertical wall portions at the front and rear sides, and therefore the vehicle exterior portion deformed when the assembled portion is inserted into the assembly recess can be stably returned to the disposed position before the deformation. Therefore, when the airbag is deployed and inflated, the tab portion can be reliably prevented from moving away from the assembly projection.

In the head-protecting airbag device having the above configuration, if the claw portions are formed on the upper surface side and the lower surface side of the locking shaft portion and the assembly convex portions are formed on both the upper and lower sides in correspondence with the claw portions, the assembly strength of the assembly portion and the assembled portion can be improved, which is preferable.

Drawings

Fig. 1 is a schematic front view of a head-protecting airbag device as an embodiment of the present invention, as viewed from the vehicle interior side.

Fig. 2 is a vertical cross-sectional view of a vehicle-mounted state of the head protecting airbag device according to the embodiment, and corresponds to a portion II-II in fig. 1.

Fig. 3 is a vertical cross-sectional view of a vehicle-mounted state of the head protecting airbag device according to the embodiment, and corresponds to a portion III-III in fig. 1.

Fig. 4 is a schematic perspective view of a housing used in the head-protecting airbag device of the embodiment.

Fig. 5 is a partially enlarged front view of the housing of fig. 4, as viewed from the vehicle interior side, to show the portion of the assembled portion.

Fig. 6 is a partially enlarged plan view showing a portion of the housing of fig. 4 where the portion is assembled.

Fig. 7 is a partially enlarged rear view showing a portion of the assembled portion of the housing of fig. 4.

Fig. 8 is a partially enlarged oblique view of the housing of fig. 4, viewed from the vehicle exterior side, to show the portion of the assembled portion.

Fig. 9 is a sectional view taken at a location IX-IX of fig. 5.

Fig. 10 is a sectional view taken at the X-X portion of fig. 6.

Fig. 11 is a perspective view of the wrapping band used in the head protecting airbag device of the embodiment as viewed from the vehicle interior side, and shows a state before the locking claw portion and the locked portion are locked and a state after the locking claw portion and the locked portion are locked.

Fig. 12 is a perspective view of the winding tape of fig. 11 viewed from the vehicle exterior side.

Fig. 13 is a front view of the windup belt of fig. 11 as viewed from the front side when mounted on the vehicle.

Fig. 14 is a partially enlarged front view showing a portion of the assembled portion in fig. 13.

FIG. 15 is a longitudinal cross-sectional view of the wound strip of FIG. 11.

Fig. 16 is a sectional view of the portion XVI-XVI in fig. 15.

Fig. 17 is a front view showing a state in which an airbag used in the head protecting airbag device of the embodiment is developed flatly, and a view showing a state in which the airbag is folded and a winding tape is wound in this order.

Fig. 18 is a view for explaining a state in which the wrapping tape of fig. 11 is wrapped around the folded body.

Fig. 19 is a partially enlarged vertical cross-sectional view showing a process of locking the locking claw portion to the locked portion when the wrapping tape is wrapped around the folded body.

Fig. 20 is a vertical cross-sectional view showing a process of locking the locking jig of the winding tape wound around the folded body to the locked portion of the case.

Fig. 21 is a vertical sectional view showing a process of locking the locking jig of the winding tape wound around the folded body to the locked portion of the case, and shows a process subsequent to fig. 20.

Fig. 22 is a partially enlarged vertical cross-sectional view showing a process of locking the locking jig for the winding tape to the locked portion of the housing.

Fig. 23 is a schematic cross-sectional view showing a process of locking the locking jig of the winding band wound around the folded body to the locked portion of the housing.

Fig. 24 is a schematic cross-sectional view showing a process of locking the locking jig of the winding band wound around the folded body to the locked portion of the case, and shows a process after fig. 23.

Fig. 25 is a front view showing an airbag assembly in the head protecting airbag device of the embodiment.

Fig. 26 is a longitudinal sectional view of the airbag assembly, showing portions XXVI to XXVI in fig. 25.

Fig. 27 is a longitudinal sectional view of the airbag assembly, showing portions XXVII-XXVII in fig. 25.

Fig. 28 is a vertical cross-sectional view showing a state in which the expansion of the airbag is completed in the head protecting airbag device according to the embodiment.

Fig. 29 is a schematic longitudinal sectional view illustrating a state in which the locking jig is strongly pulled toward the vehicle interior side when the airbag is deployed and inflated in the head protecting airbag device according to the embodiment.

Fig. 30 is a schematic partially enlarged vertical cross-sectional view illustrating a state in which the upper wall portion of the cover portion is deformed when the airbag is deployed and inflated in the head protecting airbag device according to the embodiment.

Fig. 31 is a schematic partially enlarged vertical cross-sectional view showing a portion of a flange portion when the airbag is deployed and inflated in the head protecting airbag device according to the embodiment.

Detailed Description

An embodiment of the present invention will be described below with reference to the drawings. As shown in fig. 1, the head protection airbag apparatus M according to the embodiment can cover windows (side windows) W1 and W2 of the vehicle V when inflation is completed, and can fold and house the airbag 25 in the peripheral edge of the upper edge side of the windows W1 and W2, that is, in the range from the front pillar portion FP to the vicinity above the rear pillar portion RP via the upper side rail portion RR. In the case of the embodiment, the vehicle V is configured such that the 1 intermediate pillar portion CP arranged substantially in the vertical direction is arranged between the front pillar portion FP and the rear pillar portion RP, and the airbag 25 at the time of inflation is configured to cover the vehicle interior side of the intermediate pillar garnish 7 arranged at the intermediate pillar portion CP and a part of the rear pillar garnish 8 arranged at the rear pillar portion RP together with the windows W1, W2, as shown by the two-dot chain line in fig. 1.

In the embodiment, the vertical and longitudinal directions are not particularly limited, and the description will be made so as to coincide with the vertical and longitudinal directions of the vehicle V when the vehicle is mounted.

As shown in fig. 1 to 3, the head protecting airbag apparatus M includes: an air bag 25; an inflator 12 that supplies inflation gas to the airbag 25; a mounting bracket 13; a mounting jig 17; a case 50 that houses the folded airbag 25 (folded body 44); and a winding tape 90 wound around the folded body 44. The folded airbag 25 (folded body 44), the inflator 12, and the case 50 further include a wrapping tape 90, and when mounted on the vehicle V, the folded airbag is housed in the airbag cover 10 while covering the vehicle interior side I with the airbag cover 10 (see fig. 1 to 3). In the case of the embodiment, the airbag cover 10 is configured by the lower edge 5a of the front pillar garnish 5 that covers the vehicle interior side of the front pillar portion FP and the lower edge 6a of the roof head lining 6 that covers the vehicle interior side of the roof side rail portion RR.

The front pillar garnish 5 and the roof head lining 6 are made of synthetic resin together with the center pillar garnish 7 and the rear pillar garnish 8, and are attached to the vehicle interior side I of the inner panel 2, which is a member on the vehicle body 1 side of the front pillar portion FP and the roof side rail portion RR, by an attachment means not shown. The airbag cover 10 including the lower edges 5a and 6a is configured such that the airbag 25 at the time of deployment and inflation is pressed convexly by the airbag 25, and the lower edges 5a and 6a can be opened toward the vehicle interior side I (see the two-dot chain lines and fig. 28 of fig. 2 and 3).

The inflator 12 supplies inflation gas to the airbag 25, and is formed in a substantially cylindrical cylinder shape as shown in fig. 1, and a gas discharge port, not shown, capable of discharging inflation gas is arranged on the front end side. The inflator 12 is connected to the airbag 25 by a jig 15 disposed on the outer peripheral side of the rear end side of the connection port 28, with the front end side including the vicinity of the gas discharge port being inserted into a connection port 28 described later of the airbag 25. The inflator 12 is attached to the inner panel 2 by an attachment bracket 13 that holds the inflator 12 and a bolt 14 that fixes the attachment bracket 13 to the inner panel 2 on the vehicle body 1 side.

The airbag 25 is configured to be deployed and inflated as indicated by the two-dot chain line in fig. 1, that is, to be deployed from a folded state by allowing inflation gas from the inflator 12 to flow into the airbag, and to cover the vehicle interior side of the windows W1 and W2, the center pillar portion CP, and the center pillar garnish 7 and the rear pillar garnish 8 of the rear pillar portion RP. As shown by the two-dot chain lines in fig. 2 and 3, and a and 28 in fig. 17, the airbag 25 includes: a gas inflow portion 26 that inflates the vehicle interior side wall portion 26a and the vehicle exterior side wall portion 26b separately by allowing the inflation gas G to flow into the interior; and a non-inflow portion 30 formed so as to couple the vehicle interior side wall portion 26a and the vehicle exterior side wall portion 26b to each other and prevent inflow of inflation gas. In the embodiment, the gas inflow portion 26 includes the protective expansion portion 27 and the connection port 28, and the non-inflow portion 30 includes the peripheral edge portion 31, the attachment portion 33, the plate portions 34 and 35, and the closing portion 36.

As shown in fig. 17 a, the protective inflation portion 27 of the gas inflow portion 26 includes a front protective portion 27a that covers the window W1 on the side of the front seat and a rear protective portion 27b that covers the window W2 on the side of the rear seat when the airbag 25 completes inflation. The connection port 28 is disposed near the center in the front-rear direction on the upper edge 25a side of the airbag 25, and in the case of the embodiment, is formed so as to be inclined upward rearward and project upward from the upper edge 25a side of the airbag 25, and is configured so as to be able to connect the inflator 12 and open on the rear end side. The front protection portion 27a and the rear protection portion 27b are provided with a closing portion 36 in an inner region so that a width dimension of the front-rear direction side from a flat deployed state is shortened when the inflation of the airbag 25 is completed, and a thickness is restricted so that a plate shape extending in the front-rear direction can be maintained.

The peripheral edge 31 of the non-inflow portion 30 is formed to surround the outer periphery of the gas inflow portion 26 over the entire region except for the rear end side of the connection port portion 28. In the embodiment, as shown in a of fig. 17, a through hole 32 into which a locking protrusion 125 described later formed on each winding tape 90 is inserted is formed in a region on the upper edge 31a side of the peripheral edge portion 31. In the embodiment, the through hole 32 is formed to be substantially circular. The plate-like portion 34 is disposed between the front guard portion 27a and the rear guard portion 27b, and has a substantially rectangular plate shape. The plate-shaped portion 35 is disposed on the front end side of the airbag 25, and has a substantially rectangular plate shape, and a band portion 35a extending forward in a substantially band shape is disposed on the lower end side.

The attachment portion 33 includes the front end side of the belt portion 35a of the plate-shaped portion 35, is disposed on the upper edge 25a side when the airbag 25 is completely inflated, and is a portion for attaching the upper edge 25a side of the airbag 25 to the inner panel 2, which is the vehicle body 1 side of the vehicle V. A plurality of (6 in the case of the embodiment) attachment portions 33 are arranged in the front-rear direction, and each of the attachment portions is formed to protrude upward from the upper edge 25a of the airbag 25 including the front end side of the band portion 35 a. In the airbag 25 of the embodiment, 5 mounting portions 33A disposed on the front side are mounted to the inner panel 2 using the mounting jig 17, and 1 mounting portion 33B disposed on the rear end side is not described in detail, but is configured to be mounted to the inner panel 2 using the mounting bracket 22 and the bolt 23 (see fig. 1 and 25). Each mounting portion 33A mounted to the inner panel 2 using the mounting jig 17 is formed by opening a substantially rectangular mounting hole 33A through which the mounting jig 17 is inserted. In the head protecting airbag apparatus M according to the embodiment, no case is disposed at the portion of the mounting portion 33AA disposed on the front end side of the band portion 35a and the mounting portion 33AB disposed adjacent to the rear side thereof (see fig. 1 and 25), and these mounting portions 33AA and 33AB are not illustrated but are directly mounted to the inner panel 2 without passing through the mounting seat portion of the case.

In the case of the embodiment, the airbag 25 is composed of, as shown in a of fig. 17: a main body portion 38 formed by tubular knitting using polyamide thread, polyester thread, or the like; and separate cloths 39, 40, 41, and 42 formed of a woven cloth made of polyamide thread, polyester thread, or the like, and sewn to the main body portion 38. The separate cloth 39 constitutes the plate-like portion 34, and the separate cloth 40 constitutes the plate-like portion 35. The cloth 41 forms the part of the mounting portion 33, and the cloth 42 forms the part of the connecting portion 28. The main body portion 38 is formed in a substantially rectangular shape, and constitutes the front protector 27a, the rear protector 27b, the peripheral edge portion 31, and the plate-like portion 34. In the airbag 25 of the embodiment, the main body portion 38 manufactured by tubular weaving is cut out at the plate-like portion 34, and the cut-out portion serves as the separate cloth 42 constituting the connecting port portion 28. Then, a separate cloth 39 is disposed in the cut-out region of the body portion 38 so as to close the region, thereby forming the plate-like portion 34.

In the embodiment, the airbag 25 is folded by folding the portion on the upper edge 25a side in a bellows manner and folding the lower portion side region from the lower edge 25b side toward the vehicle outer side O in a folded manner. As shown in fig. 18, the folded body 44 formed by folding the airbag 25 is formed such that the bellows-folded portion 44a is placed on the upper side of the folded portion 44b, the upper edge 31a side of the upper surface side peripheral edge portion 31 of the bellows-folded portion 44a is exposed, and the through hole 32 for locking the locking projection 125 of the wrapping tape 90 is also exposed.

The case 50 that houses the folded airbag 25 (folded body 44) is made of a thermoplastic elastomer, and in the case of the embodiment, is formed of a polyolefin thermoplastic elastomer (TPO). The housing 50 is elongated and extends in the front-rear direction. In the head protecting airbag apparatus M of the embodiment, as shown in fig. 1 and 25, three cases, namely, a case 50F that houses the front protecting portion 27a, a case 50R that houses the rear protecting portion 27b, and a case 50C that houses the portion near the connecting port portion 28, are used in the folded body 44. The case 50F disposed on the front side is formed by being bent so that the front end side thereof faces downward, corresponding to a front region on the upper edge side of the window W1, and the cases 50C and 50R are formed to extend substantially linearly in the front-rear direction, corresponding to the upper edge side of the window W2, from a rear region on the upper edge side of the window W1 (see fig. 1 and 25). In the embodiment, the case 50R disposed on the rear side is used as an example, and the detailed description will be given. The cases 50F and 50C have different outer shapes, but the configuration for attaching the wrapping tape 90 and the configuration for attaching the attachment portion 33A of the airbag 25 using the attachment jig 17 are the same as the case 50R. The case 50 is disposed around the folded body 44, and functions as a protection portion for protecting the folded airbag 25 (folded body 44) during transportation, vehicle loading, inflation, or the like, or guiding the deployment direction during inflation, and covering the folded body 44 from surrounding interference objects.

As shown in fig. 4, the housing 50R includes: a housing portion 52 for housing the folded body 44; an assembled portion 54 assembled with an assembling portion 101 of the winding tape 90; and a mount seat portion 83 mounted to the inner panel 2 on the vehicle body 1 side.

The housing portion 52 is formed along the outer peripheral surface of the folded body 44 so as to be curved in a substantially circular arc shape so as to cover the vehicle exterior side O of the folded body 44 (see fig. 2 and 3).

The assembly portion 54 for attaching the winding tape 90 is disposed on the upper side of the housing portion 52, and is formed in 1 portion slightly forward of the center in the front-rear direction in the case 50R in the embodiment (see fig. 4). As shown in fig. 5 to 8, the assembled unit 54 includes: an assembly hole 56 for assembling the locking jig 114 formed in the assembly portion 101 of the winding band 90; a cover portion 60 extending from the periphery of the hole body 57 in the assembly hole portion 56 to cover the outer peripheral side of the locking jig 114; and a locked portion receiving portion 66 that receives a locked portion 104 described later in the assembling portion 101 of the wound tape 90.

The assembly hole 56 is configured to insert the locking jig 114 formed in the assembly portion 101 of the wound band 90, and in the embodiment, as shown in fig. 5, 7, and 10, the assembly hole 56 includes: a hole body 57 as an assembly recess portion formed in a rectangular shape with its longitudinal direction substantially along the front-rear direction (the longitudinal direction of the folded body 44) by opening; and assembly projections 58U, 58D formed inside the hole body 57.

The hole body 57 constitutes an assembly recess into which the locking jig 114 is inserted, and in the case of the embodiment, the hole body is configured to be capable of penetrating in the vehicle interior-exterior direction when the vehicle is mounted so as to insert the locking jig 114. That is, the hole body 57 is configured such that the insertion direction of the locking jig 114 at the time of locking is set to a direction substantially orthogonal to the inner side surface Wa (see fig. 2) of the window W2. The assembled portion 54 of the case 50R is a portion disposed above the rear pillar portion RP behind the window W2 when the vehicle is mounted, but as shown in fig. 2 and 3, the inner panel 2 on the vehicle body 1 side is configured to be disposed substantially along the inner side surface Wa of the inner panel 2 of the window W2, and the insertion direction of the locking jig 114 is a direction toward the vehicle outer side, and in the case of the embodiment, is a direction substantially orthogonal to the inner panel 2, that is, the inner side surface Wa of the window W2. In the case of the embodiment, the hole body 57 is formed to have a flat substantially rectangular opening that is wide in the front and rear (see fig. 5, 7, and 8).

In the case of the embodiment, the assembly projections 58U and 58D are formed on the upper edge 57a side and the lower edge 57b side of the inner peripheral edge of the hole body 57, and the claw portions 116U and 116D are arranged so as to be engageable with each other at positions facing the claw portions 116U and 116D described later on the locking jig 114. The assembly convex portions 58U, 58D extend from the upper edge 57a side and the lower edge 57b side of the inner peripheral edge of the hole main body 57, and are formed obliquely with respect to the vehicle interior-exterior direction (left-right direction) so that the front end 58a side faces the vehicle exterior side O and faces the upper-lower center side (see fig. 9). The assembly projections 58U and 58D are formed so as to be able to lock the claw portions 116U and 116D of the locking jig 114, and are disposed on the root side (vehicle interior side I) of the claw portions 116U and 116D of the locking jig 114 when the locking jig 114 is inserted into the hole body 57, and engage the claw portions 116U and 116D with each other. In the case of the embodiment, the width dimension of each of the assembly convex portions 58U, 58D in the front-rear direction (the width dimension of the folded body 44 in the longitudinal direction) is set to be smaller than the opening width dimension of the hole body 57 in the front-rear direction and slightly smaller than the width dimension of the locking jig 114 (the claw piece portions 116U, 116D) in the front-rear direction (see fig. 5, 7, 23, 24).

The cover portion 60 extending from the peripheral edge of the hole main body 57 in the assembly hole portion 56 is formed in a substantially rectangular tubular shape extending from the outer peripheral edge of the hole main body 57 toward the vehicle exterior side O and covering the upper, lower, front, and rear sides of the locking jig 114 in the state of being inserted into the hole main body 57. As shown in fig. 24B and 27, the cover portion 60 is configured to cover, over substantially the entire surface except for the distal end 115a side of the locking shaft portion 115, four sides of the front, rear, top, and bottom of the locking jig 114 in a state where the claw portions 116U and 116D are engaged with the assembly convex portions 58U and 58D. The assembly protrusions 58U, 58D are formed to protrude from vehicle interior side ends 61a, 62a of the upper wall portion 61 and the lower wall portion 62 that are arranged in the cover portion 60 so as to face each other in the vertical direction (see fig. 9). In the cover portion 60, the upper wall portion 61 covering the upper side of the locking jig 114 constitutes an upper wall portion 59 covering the upper side of the assembly portion 101 in the state of being inserted into the assembly recess (hole body 57), and specifically, the upper wall portion 59 constitutes a vehicle exterior side portion in which the assembly convex portion 68U is protruded to the lower surface side. The vehicle-interior side surface 61B of the upper wall portion 61 constitutes a regulation surface that, when the locking jig 114 of the wrapping band 90 wrapped around the folded body 44 is pushed into the assembly hole portion 56 (hole body 57), the vehicle-interior side surface 61B abuts against the vehicle-exterior side surface 105a of the upper wall portion 105 in the engaged portion 104 of the wrapping band 90, and regulates movement of the wrapping band 90 toward the vehicle exterior side O (see fig. 21B and fig. 24B). In the cover portion 60, the front wall portion 63 and the rear wall portion 64 extending downward from both front and rear end sides of the upper wall portion 61 so as to cover both front and rear sides of the locking jig 114 constitute a vertical wall portion, and are arranged to extend downward from the lower wall portion 62, and connect the lower ends 63a and 64a sides to the housing portion 52 (the assembled portion 54) (see fig. 7 and 8).

The engaged portion housing portion 66 that houses the engaged portion 104 of the wound tape 90 is a portion that houses the upper wall portion 105 of the engaged portion 104 and the regions of the flange portions 111F and 111R extending from the upper wall portion 105 in the assembly portion 101 of the wound tape 90 when the assembly portion 101 is assembled to the assembly portion 54 (when the tab portions 116U and 116D are engaged with the assembly convex portions 58U and 58D), and is formed in a rectangular tubular shape that is arranged substantially in the vehicle interior-exterior direction, and a region on the central side in the front-rear direction in the lower portion side is cut out so as to allow the base portion 102 of the engagement jig 114 to be inserted therethrough (see a in fig. 9, 10, and 23). As shown in fig. 5 to 10, the portion-to-be-locked receiving portion 66 is formed to be wider in the front and rear than the cover 60, extend in the front and rear than the cover 60, and protrude upward than the cover 60 at a position of the cover 60 that becomes the vehicle interior side I.

The engaged portion receiving portion 66 includes: an upper wall portion 67 disposed so as to cover the upper wall portion 105 of the engaged portion 104 and the upper surface sides of the respective flange portions 111F, 111R so as to open the vehicle exterior side O; a front wall portion 74 and a rear wall portion 75 which are disposed so as to cover the front or rear of the respective flange portions 111F and 111R; and a front lower wall portion 76 and a rear lower wall portion 77 that cover the lower portions of the respective flange portions 111F and 111R, and are formed so as to surround, in the wound tape 90, a region from the lower surfaces of the flange portions 111F and 111R to the upper surface side of the base portion 102 (upper wall portion 105) in the assembly portion 101 (engaged portion 104) via the front end surface and the upper surface.

In the engaged portion receiving portion 66, the upper wall portion 67 covering the upper surface side of the upper wall portion 105 of the engaged portion 104 and the upper surface sides of the flange portions 111F and 111R is configured such that the front portion 68 and the rear portion 69 located above the flange portions 111F and 111R are thicker than the central portion 70 located above the upper wall portion 105 of the engaged portion 104 and protrude downward. The front portion 68 and the rear portion 69 of the upper wall portion 67 are configured to project downward from the center portion 70 so as to reduce a gap between the flange portions 111F and 111R arranged to form a step with respect to the upper wall portion 67 in a state where the engaged portion 104 is accommodated inside. In the case of the embodiment, the upper wall portion 67 is provided with: an extended portion 67c formed to continuously project upward at the outer peripheral edge (front edge, rear edge, vehicle interior edge) excluding the vehicle exterior side; and a rib 67b formed to continuously protrude upward in the front-rear center (a position directly above the rib 71) over the entire left-right (vehicle interior-exterior direction) (see fig. 6 to 8, 10). The extension portion 67c and the rib portion 67b are disposed to reinforce the strength of the upper wall portion 67.

In the embodiment, a rib 71 is formed at the center of the front and rear of the center portion 70 of the upper wall portion 67, and the rib 71 is formed to be inclined toward the lower surface 71a so as to protrude downward and increase the protruding amount from the vehicle interior I to the vehicle exterior O. Specifically, the rib 71 is formed such that the lower surface 71a side is gently inclined to the vehicle outer side O and the vehicle outer side end 71b is largely protruded downward (see fig. 9). In the case of the embodiment, the rib 71 is configured such that the amount of downward projection at the vehicle exterior end 71b is substantially equal to the amount of projection from the center side portion 70 of the front side portion 68 and the rear side portion 69 of the upper wall portion 67.

The upper wall portion 67 of the engaged portion receiving portion 66 constitutes an upper wall portion 59 that covers the upper side of the assembly portion 101 (the engaged portion 104) in a state where the locking jig 11 is inserted into the hole body 57, and specifically, an inner side portion of the upper wall portion 59 that is disposed on the inner side I of the vehicle exterior portion (the upper wall portion 61). That is, the upper wall portion 67 is arranged in a stepped manner with respect to the upper wall portion 61 so as to be located on the upper side of the upper wall portion 61 with respect to the vehicle interior side I of the upper wall portion 61 in the cover portion 60. The upper wall portion 67 is formed separately from the upper wall portion 61 of the cover portion 60. Further, the rib 71 formed at the front and rear centers on the lower surface 70a side of the upper wall portion 67 (the center portion 70) is smaller in the vertical direction than the surrounding center portion 70 on the vehicle exterior end portion 67a side by the amount of downward projection of the vehicle exterior end portion 71b (see fig. 7 and 9). The upper wall portion 67 as the vehicle interior portion is configured to suppress deformation of the upper wall portion 61 of the cover portion 60 that is displaced toward the vehicle interior I and flexes upward when a pulling force F to the vehicle interior I that attempts to pull out the assembly portion 101 from the assembly portion 54 is applied to the assembly portion 101 at the time of vehicle mounting of the head protecting airbag device M through the vehicle exterior end portion 71b of the rib portion 71. When this pulling force F acts, the portion of the case 50R around the assembled portion 54 is deformed so as to displace the cover portion 60 (the upper wall portion 61) a small amount toward the vehicle interior lower side, but in this deformation, the upper wall portion 67 is disposed such that the vehicle exterior side end portion 67a (the vehicle exterior side end portion 71B of the rib portion 71) is disposed above the vehicle interior side end portion 61a of the upper wall portion 61 and is disposed slightly on the vehicle exterior side O relative to the vehicle interior side end portion 61a as shown in fig. 29B, and even if the upper wall portion 61 is deformed so as to flex the vehicle interior side end portion 61a upward (see the two-dot chain line of fig. 29), the vehicle exterior side end portion 71B of the rib portion 71 projecting downward from the vehicle exterior side end portion 67a abuts the upper surface 61c of the deformed vehicle interior side end portion 61a, and further deformation of the upper wall portion 61 is suppressed (see fig. 30).

To explain in detail, in the embodiment, the vehicle exterior side end surface 71d of the rib 71 in the upper wall portion 67 as the vehicle interior portion and the vehicle interior side end surface 61d of the upper wall portion 61 as the vehicle exterior portion are configured to be disposed substantially in the vertical direction with the positions on the vehicle interior and exterior direction sides substantially aligned in the cross section along the vertical direction (see fig. 9), and the positions at which the vehicle exterior side end surface 71d of the rib 71 and the vehicle interior side end surface 61d of the upper wall portion 61 are disposed are positions at which the flexure of the upper wall portion 71 when the assembly portion 101 is inserted into the assembly recess (hole body 57) is allowed (see a of fig. 22). When a pulling force F to the vehicle interior side I that attempts to be pulled out from the assembled unit 54 is applied to the assembled unit 101, and the upper wall portion 61 is pulled downward toward the vehicle interior side, the vehicle interior side end surface 61d of the upper wall portion 61 is positioned on the vehicle interior side I below the vehicle exterior side end surface 71d of the rib portion 71, compared to the vehicle exterior side end surface 71d (see fig. 29B and fig. 30).

In the embodiment, the length dimension of the portion-to-be-locked housing 66 on the vehicle interior-exterior direction side (the left-right direction side) is set to a dimension that can cover the periphery of the region from the front end surfaces of the flange portions 111F and 111R to the upper surface side of the base portion 102 even before the assembly portion 101 of the wound tape 90 is inserted into the assembly portion 54 and the claw portions 116U and 116D are locked to the assembly convex portions 58U and 58D. That is, in the head protecting airbag apparatus M according to the embodiment, when the winding band 90 wound around the folded body 44 is assembled to the case 50, if the locking jig 114 of the winding band 90 is inserted until the distal ends 116a of the claw pieces 116U and 116D are brought into contact with the vehicle interior side surface 58b of the assembly convex portions 58U and 58D, as shown in fig. 21a and fig. 24 a, the flange portions 111F and 111R of the winding band 90 and the upper region (the engaged portion 104) of the base portion 102 of the assembly portion 101 are accommodated in the engaged portion accommodating portion 66, and the movement of the assembly portion 101 of the winding band 90 to the front-rear direction side and the vertical direction side is restricted by the engaged portion accommodating portion 66.

In the housing 50R of the embodiment, the reinforcing portion 80 is formed in the region of the housing portion 52 below the assembled portion 54. The reinforcing portion 80 is formed to protrude from the vehicle interior side surface 52a of the housing portion 52. More specifically, the reinforcing portion 80 is configured to extend downward from the front edge side and the rear edge side of the hole main body 57 in the assembly hole portion 56 (the lower surface sides of the front lower wall portion 76 and the rear lower wall portion 77 in the engaged portion accommodating portion 66) to the vicinity of the lower portion of the accommodating portion 52 in a state where the housing 50R is viewed from the vehicle interior side, and is substantially U-shaped (see fig. 5 and 10). The reinforcement portion 80 cooperates with the cover portion 60 extending from the peripheral edge of the hole body 57, and suppresses deformation of the peripheral edge portion of the hole body 57 and detachment of the assembled portion 101 from the assembled portion 54 when the airbag 25 is deployed and inflated. Further, the reinforcement portion 80 is disposed at a lower portion 80a substantially along the front-rear direction on the lower end side of the housing portion 52, and supports the strap body 91 of the winding strap 90 when the airbag 25 is deployed and inflated.

The mounting seat portion 83 is disposed at a position corresponding to the mounting portion 33A disposed so as to project from the folded body 44, and is formed in 1 part on the front end side in the case 50R of the embodiment (see fig. 4). The mounting seat portion 83 has a mounting hole 83A formed therein so as to penetrate in the vehicle interior-exterior direction in correspondence with the mounting hole 33A of the mounting portion 33A, and the mounting hole 83A has an opening in a substantially rectangular shape through which the mounting leg portion 20 of the mounting clip 17 penetrates.

As shown in fig. 2, the mounting jig 17 for mounting the mounting portion 33A to the inner panel 2 together with the mounting seat portion 83 is locked to the mounting hole 3 formed in the inner panel 2, and the mounting jig 17 is of a synthetic resin expansion rivet type and includes a mounting base 18 and a press pin 21 (see fig. 2 and 26) disposed in the mounting base 18. The mounting base 18 has: a base portion 19 disposed on the vehicle interior side I; and a mounting leg portion 20 that extends from the base portion 19 toward the mounting hole 3 side (vehicle exterior side O) of the inner panel 2 and is mounted to the peripheral edge of the mounting hole 3.

The base 19 has: a press pin accommodating portion 19a for accommodating the press pin 21 therein in a state before mounting to the periphery of the mounting hole 3; and a pressing plate portion 19d having a substantially rectangular plate shape with a width in the front-rear, top-bottom, and bottom directions at the vehicle exterior side end portion of the base portion 19. As shown in fig. 26, the pressing plate portion 19d is a portion for pressing the mounting portion 33A toward the mounting seat portion 83 side when the mounting jig 17 is temporarily fixed to the mounting seat portion 83 of the housing 50R via the mounting portion 33A. The press pin accommodating portion 19a is configured to be able to open the vehicle interior I by pressing the press pin 21 toward the vehicle exterior O, and engagement hole portions 19b and 19c that are able to engage with a protrusion main body 21c of an engagement protrusion 21a formed in the press pin 21 are disposed at a portion covering the upper side and a portion covering the lower side of the press pin 21. These engaging holes 19b and 19c are formed at 2 locations so as to extend in the vehicle interior-exterior direction (the press-fitting direction of the press pin 21). The engaging hole 19b disposed on the vehicle interior side I engages the boss main body 21c of the press pin 21 in a state before press fitting as shown in fig. 26, and the engaging hole 19c disposed on the vehicle exterior side O engages the boss main body 21c of the press pin 21 after press fitting as shown in fig. 2.

The mounting foot portion 20 is configured to be inserted into the mounting holes 33A, 83A through which the mounting portion 33A of the airbag 25 and the mounting seat portion 83 of the case 50R penetrate, and to be capable of temporarily fixing the mounting portion 33A to the mounting seat portion 83, and to be inserted into the mounting hole 3 formed in the inner panel 2 on the vehicle body 1 side of the vehicle V, and to be capable of mounting the mounting seat portion 83 and the mounting portion 33A to the vehicle body 1 side. An insertion recess 29a is formed in the mounting leg portion 20 so as to communicate with the press pin housing portion 19 a. As shown in fig. 2, the insertion recess 20a is a portion into which the expansion shaft 21d of the press pin 21 is inserted during press-fitting. In addition, a pair of protruding hook portions 20b are formed on the mounting leg portion 20.

As shown in fig. 2 and 26, the press pin 21 is configured such that an engaging projection 21a engageable with engaging holes 19b and 19c formed in the press pin housing portion 19a is disposed on the base side (vehicle interior side I), and an expanding shaft 21d disposed between the protruding hook portions 20b at the press-fitting time is disposed on the tip side (vehicle exterior side O). The engaging projection 21a formed on the root side includes: a flexing piece 21b formed at 2 positions facing up and down, arranged along the vehicle interior and exterior direction, and capable of flexing to the interior side in the up and down direction; and a protrusion main body 21c formed to protrude outward in the vertical direction on the front end side (vehicle inner end surface) of the flexure piece 21b, and the protrusion main body 21c is configured to be inserted into the engagement hole 19b formed in the press pin housing portion 19a in a state before press-fitting and to be engaged with the peripheral edge of the engagement hole 19 b. The engaging projection 21a is configured such that if the flexible piece 21b is flexed inward in the vertical direction, the projection main body 21c can be removed from the engaging hole 19b, the press pin 21 can be pushed so that the expansion shaft portion 21d is inserted into the insertion recess 20a, and if the projection main body 21c reaches the engaging hole 19c on the vehicle exterior side O, the flexible piece 21b is restored, and the projection main body 21c is inserted into the engaging hole 19c on the vehicle exterior side O and is engaged with the peripheral edge of the engaging hole 19 c. At this time, the expansion shaft 21d disposed on the distal end side is inserted between the protruding hooks 20b (see fig. 2).

In the mounting jig 17, when the folded body 44 formed by folding the airbag 25 is housed in the case 50(50F, 50C, 50R) to form the airbag assembly AM, the protruding hook portion 20b is engaged with the peripheral edge portion 83b of the mounting hole 83A of the mounting seat portion 83 in a state where the press pin 21 is not press-fitted into the insertion recess portion 20a (a state where the protrusion main body 21C is engaged with the peripheral edge of the engagement hole portion 19 b), and the mounting jig 17 is temporarily fixed to the mounting seat portion 83 via the mounting portion 33A (see fig. 26). When the mount section 83 is mounted to the inner panel 2, in the airbag assembly AM, in a state where the mount leg portion 20 of the mounting clip 17 protruding from the mount section 83 of the housing 50(50F, 50C, 50R) toward the vehicle exterior side O is inserted into the mount hole 3 of the inner panel 2, if the flexible piece 21b of the press pin 21 is flexed toward the center side in the vertical direction and the expansion shaft portion 21d is pressed into the insertion recess portion 20a, the boss main body 21C is inserted into the engagement hole portion 19b (see fig. 2) of the vehicle exterior side O, and is engaged with the peripheral edge of the engagement hole portion 19b, the expansion shaft portion 21d is inserted between the projecting hook portions 20b, and the projecting hook portions 20b are engaged with the peripheral edge of the vehicle exterior side O of the mount hole 3, and the mount section 33A is mounted to the inner panel 2 on the vehicle body 1 side of the vehicle V together with the mount section 83 of the housing 50(50F, 50C, 50R).

The winding tape 90 is made of thermoplastic elastomer such as polyolefin thermoplastic elastomer (TPO), and in the case of the embodiment, as shown in fig. 1 and 25, is wound at a plurality of positions (6 positions in the case of the embodiment) in the front-rear direction with respect to the folded body 44. As shown in fig. 11 to 16, the winding tape 90 includes: a band-shaped band body 91 wound around the folded body 44; an assembly portion 101 formed at one end side (a side close to the side end portion 91a which is the assembly portion 101 side) of the belt main body 91 and assembled to the assembled portion 54 of the housing 50R; a locking claw portion 93 formed on the other end side of the band main body 91 (on the side of the separated side end portion 91b separated from the assembling portion 101); a locked portion 104 formed in the assembling portion 101 (on the side of the proximal end portion 91a of the belt main body 91 that is the assembling portion 101); and a locking projection 125 that is locked to the upper edge 25a side of the airbag 25 in the folded body 44. The band main body 91 is formed into a band shape that can be wound around the folded body 44.

The locking claw portion 93 has: a projecting piece portion 94 formed to project from an end edge of the separation-side end portion 91b in the belt main body 91 in the longitudinal direction of the belt main body 91; and a claw piece 95 formed to protrude downward from a lower surface side (an inner peripheral surface side when being wound around the folded body 44) of the front end 94a side of the protruding piece portion 94. The projecting piece 94 is formed into a substantially flat plate shape disposed substantially along the longitudinal direction of the folded body 44, and the width dimension of the direction side (front-rear direction side) along the longitudinal direction of the folded body 44 is set to be smaller than the width dimension of the band main body 91 in a locking recess 107 described later that can be inserted into the locked portion 104. The projecting piece 94 is formed to project toward the vehicle outer side O in the vehicle mounted state. The claw piece 95 formed on the leading end 94a side of the protruding piece portion 94 is formed to be inclined with respect to the protruding piece portion 94 so that the leading end 95a side is directed toward the base portion 94b side of the protruding piece portion 94 substantially along the width direction of the protruding piece portion 94 (the longitudinal direction of the folded body 44). The claw piece 95 is configured to be locked to a claw piece 109 formed on an inner peripheral surface 108 of a locking recess 107 in the locked portion 104. In the case of the embodiment, the width dimension of the claw piece 95 is set to be slightly smaller than the width dimension of the protruding piece portion 94.

A pressing portion 97 for pressing the locking claw portion 93 into the locking recess 107 of the locked portion 104 is formed on the separation-side end portion 91b side (the locking claw portion 93 side) of the band main body 91. The pressing portion 97 is formed in a substantially flat plate shape, and is formed to rise from a root portion of the protruding piece portion 94 of the locking claw portion 93 in the vicinity of an end edge of the separation-side end portion 91b of the band main body 91. Specifically, the pressing portion 97 is configured to have a width dimension substantially equal to a width dimension of the belt main body 91, and is formed to protrude outward from an outer peripheral surface of the belt main body 91. In the pressing portion 97, an outer surface (a surface on the vehicle interior side I when the vehicle is mounted) disposed to be continuous from the outer peripheral surface of the belt main body 91 is a pressing operation surface 97a capable of pressing the locking claw portion 93 into the locking recess portion 107. The pressing portion 97 has a pressing operation surface 97a formed to be substantially orthogonal to the projecting direction of the locking claw portion 93 (see fig. 12 and 15). Specifically, in the embodiment, as shown in fig. 3, the pressing operation surface 97a of the pressing portion 97 is arranged substantially along the vertical direction when the vehicle is mounted. In the embodiment, the locking claw portion 93 (the projecting piece portion 94) is disposed substantially orthogonal to the pressing operation surface 97a, but specifically, is disposed slightly inclined with respect to the pressing operation surface 97a such that the tip 94a of the projecting piece portion 94 faces upward (see fig. 12 and 15).

Further, a spacer 99 is disposed on the side of the separation-side end 91b of the belt main body 91. As shown in fig. 12 and 13, the spacer 99 is formed on the lower surface side of the projecting piece 94 on the base portion 94b side and in the region of the pressing portion 97 that becomes the vehicle exterior side O. The partition portion 99 is formed to partially protrude at a substantially central position in the width direction of the belt main body 91, has a substantially triangular plate shape when viewed from the front-rear direction, and is configured such that a front end surface 99a which becomes the vehicle outer side O substantially extends along the pressing operation surface 97a of the pressing portion 97. The spacer 99 is configured to be able to bring the distal end surface 99a into contact with a proximal end surface 109c of a claw piece 109 formed in the locking recess 107 of the locked portion 104 to be the portion to be locked 91 on the side close to the side end portion 91a of the band main body 91 when the locking claw portion 93 is locked to the locking recess 107. When the locking claw 93 is pushed into the locking recess 107, the spacer 99 brings the distal end surface 99a into contact with the proximal end surface 109c of the claw piece 109, thereby defining a push-in completion position of the locking claw 93 together with the distal end surface 106a of the spacer 106 described later disposed above the locking claw 93 (see B in fig. 19).

The assembly unit 101 includes: a base 102; a locking clip 114 formed to protrude from the vehicle exterior side surface of the base portion 102; an engaged portion 104 arranged in an upper region of the base portion 102; and flange portions 111F, 111R formed to project forward and backward from the front and rear surfaces of the base portion 102.

The base portion 102 is configured to have a substantially rectangular parallelepiped outer shape, and is connected to the proximal end portion 91a of the band main body 91 at the lower end side. The box-shaped base 102 is also a place to be grasped by the operator when the winding tape 90 is wound around the folded body 44. In the case of the embodiment, the width dimension of the base portion 102 on the front-rear direction side (the longitudinal direction side of the folded body 44) is set to be substantially the same as the width dimension of the belt main body 91. The width dimension of the base portion 102 in the front-rear direction is set to be slightly smaller than the separation distance between the front lower wall portion 76 and the rear lower wall portion 77 of the engaged portion receiving portion 66 formed in the housing 50R, and the wound tape 90 is inserted into the gap between the front lower wall portion 76 and the rear lower wall portion 77 when the wound tape is attached to the housing 50R (see fig. 31). In the embodiment, the upper region (the engaged portion 104) of the base portion 102 is accommodated in the engaged portion accommodating portion 66 together with the flange portions 111F and 111R, and the lower region (the region on the lower side of the flange portions 111F and 111R and the region on the vehicle interior side I of the locking jig 114) of the base portion 102 is inserted and penetrated between the front lower wall portion 76 and the rear lower wall portion 77.

The engaged portion 104 is disposed in an upper region of the base portion 102, and has a recess 107 into which the locking claw portion 93 can be inserted to lock and lock. The locking recess 107 is formed by recessing the locked portion 104 toward the vehicle outer side O in the protruding direction of the locking claw 93 so that the locking claw 93 can be inserted. In the case of the embodiment, the locking recess 107 is formed to penetrate the to-be-locked portion 104 (the assembling portion 101) in the vehicle interior-exterior direction as shown in fig. 15. The locking recess 107 has an opening width dimension in the vertical and front-rear direction set to a dimension in which the locking claw portion 93 can be inserted. On the inner peripheral surface 108 of the locking recess 107, a claw piece 109 capable of locking the claw piece 95 is formed on the end side of the vehicle interior side I on the lower surface on the folded body 44 side, corresponding to the claw piece 95 of the locking claw portion 93. The claw piece 109 is disposed substantially along the longitudinal direction of the folded body 44 so as to be substantially along the claw piece 95 formed in the locking claw portion 93. In the embodiment, the claw piece 109 is configured such that the front end 109a protrudes upward toward the vehicle outer side O from the lower surface 108a side of the inner peripheral surface 108 in the locking recess 107, and the claw piece 95 can be locked. More specifically, the claw piece 109 is configured such that the region on the base portion 109b side protrudes from the vehicle interior side surface of the portion to be locked 104 toward the vehicle interior side I and the tip end 109a side is inverted so as to face the vehicle exterior side O. The base portion 109b side of the claw piece 109 is configured such that the base portion side end surface 109c is substantially along the pressing operation surface 97a of the pressing portion 97 at the time of vehicle mounting. As described above, the proximal end surface 109c of the claw piece 109 is configured to be capable of abutting against the distal end surface 99a of the spacer 99 formed on the side of the locking claw portion 93 when the locking claw portion 93 is pushed into the locking recess 107.

In the embodiment, the locking claw portion 93 is configured to be locked to the locking recess portion 107 of the locked portion 104 by locking the claw pieces 95 and 109 to each other. In the embodiment, a claw piece 109 extending from the locking recess 107 side and a claw piece 95 extending from the protruding piece 94 are arranged between the surface (lower surface 108a) of the inner peripheral surface 108 of the locking recess 107 on the folded-back body 44 side and the protruding piece 94 of the locking claw 93. The locking force of the claw pieces 95 and 109 is set so that they can be released by flexing each other when the airbag 25 is expanded and inflated, and that the locking cannot be easily released even if the pressing portion 97 and the part to be locked 104 are pulled by hand after being wound around the folded body 44.

In the locked portion 104, an upper wall portion 105 constituting an upper surface side of the base portion 102 and an upper edge side of the locking recess 107 is formed so as to protrude toward the vehicle interior side I from a region on the vehicle interior side I of the claw piece 109 (see fig. 13 to 15). The protruding region of the upper wall portion 105 is a portion that functions as a spacer portion 106, and is configured to be able to bring the front end surface 106a into contact with the vehicle exterior side surface 97b of the pressing portion 97 when the locking claw portion 93 is locked to the locking recess portion 107. When the locking claw 93 is pushed into the locking recess 107, the spacing portion 106 brings the front end surface 106a into contact with the vehicle exterior side surface 97b of the pressing portion 97, thereby defining a press-in completion position of the locking claw 93 together with the front end surface 99a of the spacing portion 99 disposed below the locking claw 93. The upper wall portion 105 is provided with a recess 105b recessed toward the vehicle interior side at the front-rear center side of the vehicle exterior side surface 105a so as to suppress interference with the vehicle exterior side end portion 71b of the rib portion 71 formed on the upper wall portion 67 of the engaged portion accommodating portion 66 (see fig. 12 and 23).

As shown in fig. 11 a, 12, and 23, the flange portions 111F and 111R are formed so as to protrude toward both sides in the width direction of the belt main body 91 (both sides in the longitudinal direction of the folded body 44) at positions on the assembly portion 101 that are on the side of the base portion 115b of the locking shaft portion 115. Specifically, the flange portions 111F and 111R are formed to project forward and backward from the upper region of the base portion 102, that is, the front and rear surfaces of the upper wall portion 105 of the engaged portion 104, and project forward and backward so as to be continuous with the upper wall portion 105, and are formed in a substantially flat plate shape substantially extending in the forward and backward directions. These flange portions 111F and 111R are configured such that, in order to improve the ease of the accommodating operation into the engaged portion accommodating portion 66 when the wound belt 90 is attached to the housing 50R, the vehicle outer surface is inclined with respect to the vehicle inner-outer direction so that the center side in the front-rear direction (the engaged portion 104 side) is positioned on the vehicle outer side and the end side in the front-rear direction is positioned on the vehicle inner side, and the outer shape as viewed from the top-bottom direction side is formed into a substantially trapezoidal shape (see fig. 23). Each of the flange portions 111F and 111R is configured to be able to be accommodated in the engaged portion accommodating portion 66 together with the upper wall portion 105 (the engaged portion 104) of the base portion 102, and when accommodated in the engaged portion accommodating portion 66, the front end is brought close to the front wall portion 74 and the rear wall portion 75 of the engaged portion accommodating portion 66, respectively, and the lower surface side is supported by the front lower wall portion 76 and the rear lower wall portion 77 (see fig. 31). The flange portions 111F and 111R are set such that, when the assembly portion 101 is assembled to the assembly portion 54 (when the claw pieces 116U and 116D are locked to the assembly protrusions 58U and 58D), the width of the vehicle interior/exterior direction side is set such that the vehicle interior side surface is positioned on the vehicle exterior side of the portion-to-be-locked housing 66, and the flange portions are disposed at a position substantially matching the vehicle interior side surface of the portion-to-be-locked housing 66 in a state where the tip ends 116a of the claw pieces 116U and 116D are brought into contact with the vehicle interior side surface 58b of the assembly protrusions 58U and 58D by the locking jig 114 (see A, B in fig. 24).

The locking jig 114 is locked to the assembled portion 54 of the case 50R when the folded body 44 is housed in the case 50R. As shown in fig. 13 and 14, the locking jig 114 is formed so as to protrude toward the vehicle outer side O from the vehicle exterior side surface (the region below the locking recess 107) which is the region below the locked portion 104 in the base portion 102. The locking jig 114 includes: a substantially flat plate-like locking shaft portion 115 formed to project from the base portion 102 toward the vehicle exterior side O; claw portions 116U and 116D formed to protrude toward the upper surface side and the lower surface side of the locking shaft portion 115; and an auxiliary projection 118 disposed at a position on the upper surface 115c side of the locking shaft portion 115, which is the root side of the claw piece portion 116U.

The locking shaft portion 115 is formed in a flat plate shape having an axial direction substantially along the width direction of the band main body 91 (the longitudinal direction of the folded body 44), and is configured to protrude outward. Specifically, the locking shaft portion 115 is configured to extend in a direction substantially perpendicular to the inner side surface Wa of the window W2. In other words, the locking shaft portion 115 is formed to protrude substantially in the penetrating direction of the hole main body 57 (assembly concave portion) in the assembly portion 54. The locking shaft portion 115 is set to have a width substantially equal to that of the locked portion 104 (base portion 102) and slightly smaller than the opening width of the hole body 57 on the front-rear direction side so as to be smoothly inserted into the hole body 57. The locking shaft portion 115 is configured to be increased in thickness from a portion on the root portion 115b side on the side of the locked portion 104 to the locked portion 104 in order to secure the locking strength of the locking jig 114 to the periphery of the assembly hole portion 55 of the assembly portion 54.

The claw portions 116U and 116D are disposed on the upper surface side and the lower surface side of the locking shaft portion 115, and are formed obliquely so as to protrude upward and downward from the front end 115a of the locking shaft portion 115, invert, and separate from the locking shaft portion 115. That is, the claw portions 116U and 116D are formed so as to be inverted from the distal end 115a side of the locking shaft portion 115 and to be expanded. The claw portions 116U and 116D are flexible. In the embodiment, the claw portions 116U and 116D are formed over the entire region of the locking shaft portion 115. The claw portions 116U and 116D are formed so as to be engaged with the assembly convex portions 58U and 58D formed on the upper edge 57a side and the lower edge 57b side of the hole main body 57 and so as to face the assembly convex portions 58U and 58D when the engagement jig 114 is inserted into the assembly hole portion 56 formed in the assembly portion 54 of the housing 50R.

The auxiliary projection 118 is formed to project upward at a position on the upper surface 115c side of the locking shaft portion 115, which is the root side of the claw piece portion 116U (the vehicle interior side I when the vehicle is mounted). Specifically, the auxiliary projection 118 is formed at a position close to the vehicle interior side I of the front end 116a of the claw piece portion 116U in a state where the locking jig 114 is viewed from above (see fig. 14 and 23). The auxiliary projection 118 is formed at a position on the vehicle exterior side O of the assembly convex portion 58U when the assembly portion 101 is assembled to the assembled portion 54 (when the locking jig 114 is pushed into the assembly hole portion 56) (see B of fig. 21B and 22B). When the assembly portion 101 is assembled to the assembly portion 54, the locking jig 114 is disposed such that the distal end 115a of the locking shaft portion 115 projects outward from the cover portion 60 toward the vehicle exterior side O (see fig. 21B and 22B). When the locking jig 114 is pushed into the assembly hole 56, the auxiliary projection 118 inclines the upper surface 118a in the vehicle interior-exterior direction so as to descend toward the vehicle exterior side O, and can easily go over the assembly projection 58U (see fig. 14 and 22 a). The auxiliary projection 118 is set so that the projecting amount of the locking shaft portion 115 from the upper surface 115c is smaller than the claw portion 116U, and so that the auxiliary projection interferes with the assembly projection 58U in a state where the assembly portion 101 is assembled to the assembled portion 54, and the movement of the locking jig 114 (the assembly portion 101, that is, the wound tape 90) to the vehicle interior side I can be restricted. The auxiliary protrusion 118 is formed over the entire area of the locking shaft portion 115. By providing the auxiliary projection 118, interference between the tab portion 116U and the assembly convex portion 58U can be prevented after the assembly portion 101 is assembled to the assembly portion 54, and rattling during vehicle mounting can be prevented. The auxiliary projection 118 is separated from the assembly projection 58U when the airbag 25 is deployed and inflated, and is disposed on the vehicle interior side I with respect to the assembly projection 58U (see fig. 28 and 29).

The locking jig 114 is disposed so that the projecting direction (the pressing direction, the axial direction of the locking shaft portion 115) is substantially perpendicular to the pressing operation surface 97a of the pressing portion 97 in a state where the wrapping band 90 is wrapped around the folded body 44 (see fig. 20). That is, since the locking jig 114 is disposed so that the pressing direction toward the assembly hole 56 formed in the assembly portion 54 is substantially orthogonal to the pressing operation surface 97a of the pressing portion 97 when the locking jig 114 is attached to the case 50R in a state of being wound around the folded body 44, if the pressing operation surface 97a is pressed, the vehicle exterior side surface 97b of the pressing portion 97 abuts against the front end surface 106a of the spacer 106 formed in the engaged portion 104, and the front end surface 99a of the spacer 99 formed in the lower region of the pressing portion 97 abuts against the proximal end surface 109c of the claw piece 109 in the engaged portion 104, and the locking jig 114 is pressed together with the engaged portion 104, whereby the locking jig 114 can be inserted into the assembly hole 56. Then, if the locking jig 114 is pushed into the assembly hole portion 56 by locking the respective claw portions 116U and 116D to the assembly convex portions 58U and 58D until the auxiliary projection 118 is disposed on the vehicle exterior side O of the assembly convex portion 58U on the upper side, the locking jig 114 can be assembled to the assembled portion 54 (see B of fig. 21).

The engaging projection 125 engaged with the upper edge 25a side of the airbag 25 in the folded body 44 is formed on the side of the separated side end portion 91b of the band main body 91 where the engaged portion 104 and the engaging jig 114 are arranged. The locking projection 125 is formed to project from the inner peripheral side toward the inner side (downward when the vehicle is mounted) at a position on the side of the separated side end portion 91b of the band main body 91. As shown in fig. 18, the locking projection 125 includes: a rod-shaped locking neck portion 126 that can be inserted through a through hole 32 formed on the upper edge 25a side of the airbag 25; and a locking head 127 formed by bulging on the front end side of the locking neck 126. In the embodiment, the locking neck portion 126 is formed in a substantially rectangular parallelepiped shape having a long length in the longitudinal direction of the band main body 91, and recesses (not shown) for scraping are disposed on both end surface sides in the width direction (see fig. 16). In the case of the embodiment, the locking neck 126 is inserted through the circular through hole 32 so as to press and expand the through hole 32 (see fig. 18). As shown in fig. 16, the locking head portion 127 is configured such that the width dimension of the longitudinal side of the band main body 91 is substantially the same as the width dimension of the longitudinal side of the band main body 91 in the locking neck portion 126, and extends from the front end of the locking neck portion 126 to both sides (both front and rear sides in the vehicle mounting) of the band main body 91 in the width direction in a substantially flat plate shape. In the case of the embodiment, the locking head 127 has a substantially octagonal plate shape in which the width direction side of the band main body 91 is wide and four corners are rounded, and is configured to be lockable to the peripheral edge of the through hole 32 formed in the airbag 25.

The locking projection 125 locks the locking head 127 to the peripheral edge of the through-hole 32 when the wrapping band 90 is disposed to be inserted into the through-hole 32 from above the folded body 44 when the wrapping band 90 is wrapped around the folded body 44, and prevents the folded body 44 from rotating relative to the wrapping band 90 when the wrapping band 90 is wrapped around the folded body 44 (when the locking claw 93 is locked to the locked portion 104). Therefore, if the locking head 127 of the locking projection 125 is locked to the peripheral edge of the through hole 32, even if the locked portion 104 is not firmly gripped, the locking claw 93 can be accommodated in the locking recess 107, the locking claw 93 can be easily locked to the locked portion 104, and the winding work of the winding tape 90 around the folded body 44 can be facilitated. Further, by engaging the engaging projection 125 provided on the windup strip 90 with the upper edge 25a side of the airbag 25, the position of a fold VF (see fig. 18) that is positioned on the vehicle interior side and folded is made substantially constant over substantially the entire front and rear region below the through hole 32 through which the engaging projection 125 passes, and the folded body 44 can be mounted on the vehicle V.

Next, mounting of the head protecting airbag apparatus M on the vehicle V will be described. First, the airbag 25 is folded as shown in fig. 17B and fig. 18. In the case of the embodiment, from the state where the airbag 25 is unfolded flat, the area on the upper edge 25a side is folded in a bellows manner with a fold line substantially parallel to the upper edge 25a to form a bellows-folded portion 44a, and the lower area is folded with a fold line that is wound toward the vehicle exterior side wall portion 26b side to form a fold-up portion 44b to form a folded-up body 44. In the folded body 44 of the embodiment, as shown in fig. 18, a fold VF folded at the vehicle interior side I is provided in the bellows fold portion 44a at a position close to the upper edge 25a and below the through hole 32, and the through hole 32 is exposed on the upper surface side of the folded body 44.

Next, as shown in fig. 17C and 18, the winding tape 90 is wound around the folded body 44 to surround the folded body 44. At this time, first, as shown in fig. 18, the locking protrusion 125 of the winding tape 90 is inserted into the through-hole 32, and the locking head 127 of the locking protrusion 125 is locked to the peripheral edge of the through-hole 32. Next, by grasping the pressing portion 97, bringing the locking claw portion 93 close to the portion to be locked 104 so as to wind the band main body 91 around the folded body 44, pressing the pressing operation surface 97a of the pressing portion 97, and pressing the locking claw portion 93 into the locking recess 107 of the portion to be locked 104, as shown in fig. 19, the claw piece 95 of the locking claw portion 93 is locked to the claw piece 109 formed on the inner peripheral surface 108 of the locking recess 107, and the locking claw portion 93 can be locked to the portion to be locked 104. Further, as shown in C of fig. 17, the folded body 44 can be surrounded by the winding tape 90 to prevent the folding deformation.

Next, the folded body 44 is attached to the case 50(50F, 50C, 50R). At this time, in a state where the attachment portion 33A is superimposed on the vehicle interior surface 83c of the attachment seat portion 83, the leg portion 20 of the attachment jig 17 is inserted into the attachment holes 33A, 83A of the attachment portion 33A and the attachment seat portion 83 from the vehicle interior surface 83c side of the attachment seat portion 83, the leg portion 20 is engaged with the peripheral edge portion 83b of the attachment hole 83A in the attachment seat portion 83, and the attachment jig 17 is temporarily fixed to the attachment seat portion 83 (see fig. 26). As shown in fig. 20 to 24, when the locking jig 114 formed on the winding tape 90 is brought close to the assembly portion 54, the pressing operation surface 97a of the pressing portion 97 is pressed, and the locking jig 114 is pressed into the assembly hole portion 56 of the assembly portion 54, the claw portions 116U and 116D of the locking jig 114 are locked to the assembly convex portions 58U and 58D formed on the periphery of the hole body 57 of the assembly hole portion 56, and the locking jig 114 can be locked to the assembly portion 54. At this time, in the embodiment, the auxiliary projection 118 is disposed on the vehicle exterior side O of the upper assembly projection 58U at a position on the upper surface 115c side of the locking shaft portion 115 of the locking jig 114 (see fig. 21B and 22B). At this time, the upper portion (the engaged portion 104) of the assembling portion 101 is accommodated in the engaged portion accommodating portion 66 together with the flange portions 111F and 111R (see B of B and 24 of fig. 21). Further, the airbag assembly AM shown in fig. 25 can be formed by attaching the mounting bracket 22 to the mounting portion 33B, inserting the inflator 12 to which the mounting bracket 13 is attached into the connecting port portion 28 of the airbag 25 protruding from the folded body 44, and connecting the connecting port portion 28 and the inflator 12 by the jig 15.

Further, if the press pin 21 is press-fitted so that the mounting leg portion 20 of the mounting clip 17 protruding from the airbag assembly AM is inserted into the mounting hole 3 formed in the inner panel 2 and the expansion shaft portion 21d of the mounting clip 17 is disposed between the protruding hook portions 20b, as shown in fig. 2, the protruding hook portions 20b can be engaged with the peripheral edge of the mounting hole 3, and the mounting portion 33A can be mounted to the inner panel 2 on the vehicle body 1 side together with the mounting seat portion 83 of the case 50. Meanwhile, if the mounting bracket 13 of the inflator 12 is fixed to a predetermined position of the inner panel 2 by the bolt 14 and the mounting bracket 22 attached to the mounting portion 33B is fixed to a predetermined position of the inner panel 2 by the bolt 23, the airbag assembly AM can be assembled to the vehicle V. Then, if the inflator 12 is wired with a lead wire, not shown, extending from the control device for the inflator operation, and the front pillar garnish 5, the roof head lining 6, the center pillar garnish 7, and the rear pillar garnish 8 are attached to the inner panel 2 on the vehicle body 1 side, the head protection airbag device M can be mounted on the vehicle V.

When the inflator 12 is actuated upon receiving an actuation signal from the control device after the head protection airbag apparatus M is mounted on the vehicle V, the inflation gas discharged from the inflator 12 flows into the airbag 25, and the inflated airbag 25 releases the engagement state between the engagement claw 93 and the engaged portion 104 in the winding belt 90, presses and opens the airbag cover 10, protrudes downward, and deploys, and completes inflation so as to cover the vehicle interior sides of the windows W1, W2, the intermediate pillar portion CP, and the rear pillar portion RP, as shown by the chain double-dashed line in fig. 1 and fig. 28.

In the head protecting airbag apparatus M according to the embodiment, the upper wall portion 59 covering the upper side of the assembly portion 101 inserted into the hole body 57 as the assembly recess is formed in a stepped shape, and includes: a vehicle exterior portion (in the case of the embodiment, the upper wall portion 61 in the cover portion 60) having an assembly convex portion 58U that locks the claw piece portion 116U in the assembly portion 101; and an inboard portion (in the case of the embodiment, the upper wall portion 67 in the engaged portion accommodating portion 66) that is located on the upper side in the vehicle interior I of the vehicle outboard portion (the upper wall portion 61). That is, in the head protecting airbag apparatus M of the embodiment, since the upper wall portion 61 having the assembling convex portion 58U is disposed apart from the upper wall portion 67 and offset toward the vehicle outer side O, when the assembling portion 101 is inserted into the assembling concave portion (the hole main body 57), as shown by the two-dot chain line in fig. 22 a, only the upper wall portion 61 alone can be deformed so as to be flexed upward, and the assembling portion 101 can be assembled to the assembled portion 54 with a small force as compared with the conventional head protecting airbag apparatus. Further, when a pulling force F (see B in fig. 29) toward the vehicle interior side I that attempts to be pulled out from the assembled portion 54 is applied to the assembled portion 101 during deployment and inflation of the airbag 25, a portion of the housing 50 around the assembled portion 54 deforms (see B in fig. 29) such that the cover portion 60 (the upper wall portion 61) is slightly displaced toward the vehicle interior side downward, but during this deformation, the deformation of the upper wall portion 61 that is displaced toward the vehicle interior side I and flexes upward such that the vehicle exterior side end portion 67a is disposed above the vehicle interior side end portion 61a of the upper wall portion 61 at the vehicle exterior side portion (the upper wall portion 61) and is disposed relatively on the vehicle exterior side O with respect to the vehicle interior side end portion 61a at the vehicle interior side I is suppressed at the vehicle interior side portion (the upper wall portion 61). To be more specific, in the head protecting airbag device M of the embodiment, the rib 71 projecting downward is formed on the lower surface 70a side of the upper wall portion 67 constituting the vehicle interior region so as to increase the projecting amount to the vehicle exterior side, and when the pulling force F as described above is applied, the upper wall portion 67 has the vehicle exterior side end portion 67a (the vehicle exterior side end portion 71B of the rib 71) disposed above the vehicle interior side end portion 61a of the upper wall portion 61 displaced slightly downward toward the vehicle interior side and disposed relatively to the vehicle exterior side O (see B in fig. 29) in a small amount compared to the vehicle interior side end portion 61a, and even if the vehicle interior side end portion 61a is deformed so as to be deflected upward as indicated by the two-dot chain line in fig. 29, the lower surface 71c of the vehicle exterior side end portion 71B of the rib 71 projecting downward from the vehicle exterior side end portion 67a abuts against the upper surface 61B of the vehicle interior side end portion 61a of the upper wall portion 61, further deformation of the upper wall portion 61 is suppressed, and the engagement state between the claw piece portion 116U and the distal ends 116a and 58a of the assembly convex portion 58U can be maintained (see fig. 30). Therefore, in the head protecting airbag apparatus M according to the embodiment, when the winding of the winding tape 90 is released and the airbag 25 is pulled downward in accordance with the expansion of the portion-to-be-locked housing 66 when the airbag 25 is deployed and inflated, the upper wall portion 61 (the portion on the vehicle exterior side) having the assembly protrusion 58U that is locked to the claw portion 116U of the assembly portion 101 can be restrained from being deformed upward by the upper wall portion 67 (the portion on the vehicle interior side) of the portion-to-be-locked housing 66, and therefore, the locked state between the claw portion 116U formed on the upper surface side of the locking shaft portion 115 in the assembly portion 101 and the assembly protrusion 58U formed inside the assembly recess (the hole body 57) can be reliably prevented from being released.

Therefore, in the head protecting airbag device M of the embodiment, the attachment work to the case 50 is easy, and the wrapping band 90 can be firmly attached to the case 50.

In particular, in the head protecting airbag device M of the embodiment, since the rib 71 projecting downward is disposed at the position of the upper wall portion 67, which is the vehicle interior region, which is substantially the center in the front-rear direction, the deformation of the upper wall portion 61, which is deformed so as to project largely upward in the vicinity of the center in the front-rear direction, can be reliably suppressed by the rib 71 formed so as to project locally when the pulling force F to the vehicle interior side I, which attempts to be pulled out from the assembled portion 54, acts on the assembled portion 101, without providing the above-described rib over substantially the entire region in the front-rear direction.

In the head protecting airbag device M according to the embodiment, a front wall portion 63 and a rear wall portion 64, which are vertical wall portions, are formed on both front and rear end sides of an upper wall portion 61 of a cover portion 60 constituting a vehicle exterior region, and the front wall portion 63 and the rear wall portion 64 are arranged so as to extend downward to cover both front and rear sides of the locking shaft portion 115 and to be continuous with the assembled portion 54 side (the accommodating portion 52 side in the case of the embodiment). That is, in the head protecting airbag apparatus M of the embodiment, since the upper wall portion 61 is stably supported by the front wall portion 63 and the rear wall portion 64 on both the front and rear sides, the upper wall portion 61 deformed when the assembling portion 101 is inserted into the assembling recess (the hole body 57) can be stably restored to the arrangement position before the deformation. Therefore, when the airbag 25 is deployed and inflated, the tab portion 116U can be reliably prevented from moving away from the assembly projection 58U. In addition, if the above-described points are not taken into consideration, the vehicle exterior portion may be configured such that the vertical wall portion is disposed in either the front or the rear.

Further, in the head protecting airbag device of the embodiment, the claw portions 116U and 116D are formed on the upper surface side and the lower surface side of the locking shaft portion 115, and the assembling protrusions 58U and 58D are also formed on both the upper and lower sides corresponding to the claw portions 116U and 116D, so that the assembling strength of the assembling portion 101 and the assembling portion 54 can be improved. In addition, if the above points are not taken into consideration, the tab portion and the assembly projection portion may be arranged only in the upper region.

In the head protecting airbag apparatus M according to the embodiment, the assembling portion 101 includes the flange portions 111F and 111R, the flange portions 111F and 111R are formed to protrude from the engaged portion 104, which is a region on the side of the engaging shaft portion 115, to both sides (front and rear sides) in the width direction of the wound tape 90, and the flange portions 111F and 111R are configured to support the lower surface side by the front lower wall portion 76 and the rear lower wall portion 77 (the assembled portion 54) in the engaged portion housing portion 66 in a state where the assembling portion 101 is assembled to the assembled portion 54. Therefore, when the winding of the winding tape 90 is released during the deployment and inflation of the airbag 25 and the airbag 25 is pulled downward as it inflates, the flange portions 111F and 111R support the lower surface side at the front and rear lower wall portions 76 and 77, and the pulling force F (see fig. 31) directed downward can be resisted, and the pulling force can be suppressed from directly acting on the regions of the pawl portions 116U and 116D and the assembly convex portions 58U and 58D. Therefore, in the head protecting airbag device M of the embodiment, the flange portions 111F and 111R achieve a synergistic effect, the rib portion 71 is formed on the upper wall portion 67 (vehicle interior side portion) of the portion-to-be-locked receiving portion 66, and the flange portions 111F and 111R protruding forward and backward from the portion-to-be-locked receiving portion 66 are provided, whereby the locked state between the claw piece portion 116U formed on the upper surface side of the locking shaft portion 115 in the assembling portion 101 and the assembling protrusion 58U formed inside the assembling recess (hole body 57) can be prevented as much as possible from being released.

In the head protecting airbag apparatus M according to the embodiment, the housing 50 includes the engaged portion receiving portion 66 that is capable of receiving the engaged portion 104 in the wound tape 90, and the engaged portion receiving portion 66 is configured to surround the periphery of the engaged portion 104 (specifically, an area from the lower surface side of the flange portions 111F and 111R to the upper side of the assembling portion 101 (upper wall portion 105) through the front end surface) in a state before the claw pieces 116U and 116D are engaged with the assembling protrusions 58U and 58D. Therefore, when the folded body 44 is stored in the case 50 in a state of being laid down in the lateral direction with the left side in FIG. 20 set as the upper side, if the winding tape 90 is set as shown in a of fig. 21 and a of fig. 24, in the following manner, that is, the front ends 116a of the claw portions 116U, 116D of the locking jig 114 are brought into contact with the vehicle inside surfaces 58b of the assembly convex portions 58U, 58D, the assembly portion 101 is accommodated in the portion-to-be-locked accommodating portion 66, in a state before the claw portions 116U, 116D are locked to the assembling protrusions 58U, 58D, even if the operator takes his or her hand away, the movement of the assembly unit 101 is suppressed, the state of being accommodated in the receiving unit-to-be-locked portion 66 can be maintained, the winding tape 90 can be made to stand by itself, therefore, the assembly portion 101 is accommodated in the engaged portion accommodating portion 66, so that the winding tape 90 and the housing 50 can be easily aligned in advance. That is, since the assembling portion 101 can be temporarily provided so as to be accommodated in the portion-to-be-engaged accommodating portion 66, the assembling portion 101 can be temporarily accommodated in the portion-to-be-engaged accommodating portion 66, and for example, a winding operation of winding a band-shaped material that can be broken, not shown, around a predetermined portion of the housing 50 and a predetermined portion of the folded body 44 can be performed, and then the assembling portion 101 can be assembled to the assembled portion 54, so that the workability can be further improved.

In the head protecting airbag apparatus M according to the embodiment, since both the case 50 and the winding band 90 are made of the thermoplastic elastomer, it is possible to suppress the occurrence of small pieces separated by local damage, breakage, or the like when the airbag 25 is deployed and inflated.

In the head-protecting airbag apparatus M according to the embodiment, the winding band is configured to be released from winding by releasing the engagement state between the engaging claw portion and the engaged portion when the airbag is deployed and inflated, but the method of releasing winding of the winding band around the folded body is not limited to the embodiment, and for example, the winding band may be configured to be released from winding by arranging a band main body at a portion to be ruptured when the airbag is deployed and inflated, and rupturing the band main body itself.

Claims (5)

1. A head-protecting airbag device is configured to include:

an airbag configured to cover a window of a vehicle when inflation is completed, and folded and housed on an upper edge side of an inside of the window;

a synthetic resin case that houses a folded body of the airbag folded so that a lower edge side at the time of completion of inflation approaches an upper edge side; and

a winding band made of flexible synthetic resin, capable of releasing winding when the airbag is expanded and inflated, wound around the folded body for preventing folding deformation, and having an assembling portion assembled to the housing side,

the head protecting airbag device is configured in such a manner that the case has an assembled portion capable of assembling the assembled portion on an upper side of a housing portion in which the folded body is housed,

the head-protecting airbag apparatus is characterized in that,

the housing and the winding band are both made of a thermoplastic elastomer,

the assembly portion has: a locking shaft portion protruding toward the vehicle exterior side; and a claw piece portion which is formed to be flexible and is formed to be inverted from a front end side of the locking shaft portion on at least an upper surface side of the locking shaft portion and to be separated from the locking shaft portion,

the assembled unit includes:

an assembly recess into which the assembly portion is inserted;

an assembly convex portion formed on the ceiling surface side inside the assembly concave portion, locking the inserted claw piece portion, and assembling the assembly portion to the assembled portion; and

an upper wall portion that covers an upper side of the assembly portion in a state of being inserted into the assembly recess,

the upper wall portion is configured to have: a vehicle exterior portion that projects the assembly projection on a lower surface side; and a vehicle interior portion arranged in a stepped manner so as to be located on an upper side of the vehicle exterior portion in a vehicle interior side of the vehicle exterior portion,

the inner side part of the vehicle is provided with a plurality of wheels,

is configured to be separated from a portion of the vehicle exterior portion where the assembly convex portion is provided so as to be deformable upward of the vehicle exterior portion when the assembly portion is inserted, and is configured to be deformable upward of the vehicle exterior portion when the assembly portion is inserted, and

when a pulling force to the inside of the vehicle, which attempts to pull out the assembled unit from the assembled unit, acts on the assembled unit, the outside end portion is disposed above the inside end portion of the outside portion, which is slightly displaced toward the lower side of the inside of the vehicle, and is disposed on the outside of the vehicle relative to the inside end portion, and thus deformation of the outside portion, which tends to flex upward, can be suppressed.

2. The head-protecting airbag apparatus according to claim 1,

the vehicle exterior portion is configured to have a vertical wall portion extending downward at both front and rear end sides so as to cover both front and rear sides of the locking shaft portion and connected to the assembled portion side.

3. The head-protecting airbag apparatus according to claim 1,

the claw piece portions are formed on the upper surface side and the lower surface side of the locking shaft portion,

the assembling convex part is formed at the upper and lower sides corresponding to the claw part.

4. The head-protecting airbag apparatus according to claim 1,

a rib protruding downward is disposed at a position that is substantially at the center of the front-rear direction in the upper wall portion in the vehicle exterior region.

5. The head-protecting airbag apparatus according to claim 1,

the assembling portion is arranged in a region on a root side of the locking shaft portion so that a flange portion, a lower surface side of which is supported by the assembled portion, extends forward and backward in a state of being assembled to the assembled portion.

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