JP2023072463A - Mounting structure of vehicle curtain airbag device - Google Patents

Abstract

To obtain a mounting structure of a vehicle curtain airbag device which enables efficient reduction of a downward load which is input to a case which houses a rolled curtain airbag by the curtain airbag on a steady basis.SOLUTION: A mounting structure 10 of a vehicle curtain airbag device 30 includes: a case 40 having a storage recessed part 50 for lifting up and storing a center part 32C of a curtain airbag 32 which is rolled with its anteroposterior direction set as an axial direction; a lower engagement part 44 provided at a support part 42 extending downward from a lower surface of the case 40; and an upper engagement part 48 which protrudes upward from a portion located on an upper surface of the case 40 and corresponding to a curved part 32V of the curtain airbag 32. The upper engagement part 48 is provided on a virtual straight line K connecting an axial center part of the curtain airbag 32 which is not stored in the storage recessed part 50 with an axial center part of the curtain airbag 32 stored in the storage recessed part 50 when viewed from the axial direction of the curtain airbag 32.SELECTED DRAWING: Figure 4

Description

The present invention relates to a mounting structure for a curtain airbag device for a vehicle.

The upper end of a resin protector (case) integrally having a storage recess for storing the central portion of the roll-folded curtain airbag in the front-rear direction is attached to the body panel by a clip with an assembly seat protruding from the upper end of the protector (case). A curtain airbag device is conventionally known in which the protector is fixed by locking and the lower end of the protector is fixed to a body panel by bolting (see, for example, Patent Document 1).

In addition, the upper end of a resin cover (case) integrally having a protective portion (accommodating recess) for accommodating a roll-folded curtain airbag is integrally formed with the base portion of the upper end so as to be engageable and detachable. A curtain airbag device fixed to a body panel by a stop (locking claw) is also conventionally known (see, for example, Patent Document 2).

JP 2020-001459 A JP 2013-147240 A

The front-rear central portion of the roll-folded curtain airbag is stored in the storage recess of the resin case, so that the front-rear center portion stored in the storage recess is positioned at the uppermost side, and the front and rear of the curtain airbag are positioned at the uppermost position. A portion on the front side and a portion on the rear side of the center portion in the direction may be positioned below the center portion in the front-rear direction. That is, there is a case where the central portion of the roll-folded curtain airbag in the front-rear direction is lifted and stored, and curved portions are formed in the front and rear portions of the central portion in the front-rear direction.

Here, the roll-folded curtain airbag has a certain degree of hardness (rigidity). Therefore, the curved portions formed in the front and rear portions of the central portion of the curtain airbag stored in the storage recess do not follow the storage recess well. As a result, in the stored state of the curtain airbag, the curtain airbag always presses the storage recess (part of the case) downward, and the storage recess (part of the case) has a downward force. Load is always input.

By the way, a case integrally having such a storage recess may be fixed by engaging a locking claw provided at the bottom thereof with a body panel. Therefore, when the roll-folded curtain airbag constantly applies a downward load to the storage recess (part of the case), the locking claw also constantly receives a downward load. It will be in a state where

Therefore, for example, in the case where a pair of upper and lower locking pawls are provided (that can be elastically deformed in the vertical direction), a creep phenomenon may occur in which the locking pawls remain elastically deformed in the vertical direction and do not return. have a nature. If a creep phenomenon occurs in the locking claw and rattling occurs between the locking claw and the part to be locked to which the locking claw is locked, the rattling occurs during running of the vehicle. Abnormal noise is generated due to

Accordingly, the present invention provides a mounting structure for a vehicle curtain airbag device capable of efficiently reducing the load toward the vehicle lower side that is always input by the curtain airbag to a case containing a roll-folded curtain airbag. The purpose is to obtain

In order to achieve the above object, a mounting structure for a vehicle curtain airbag device according to claim 1 of the present invention is provided at a roof side portion of a vehicle and is rolled with the vehicle front-rear direction as an axial direction. A resin case having a storage recess for lifting and storing a substantially center portion of the curtain airbag in the vehicle front-rear direction, and a support portion extending from the lower surface of the case toward the vehicle lower side and engaged with the vehicle body. A side engaging portion protrudes upward of the vehicle from a portion of the upper surface of the case corresponding to curved portions on the front side and the rear side of the vehicle relative to the substantially central portion of the curtain airbag in the vehicle front-rear direction, and is engaged with the vehicle body. and an upper locking portion that is stopped, and when viewed from the axial direction of the roll-folded curtain airbag, the axial center portion of the curtain airbag that is not stored in the storage recess and is stored in the storage recess. The upper engaging portion is provided on an imaginary straight line connecting the axial center portion of the curtain airbag, which is located at the center of the curtain airbag.

According to the first aspect of the present invention, the lower locking portion provided on the support portion extending downward from the lower surface of the case is locked to the vehicle body, so that the curtain air is released through the storage recess. Support the bag. An upper engaging portion projecting upward from the upper surface of the case and corresponding to the curved portions on the vehicle front side and the vehicle rear side of the vehicle front-rear direction substantially central portion of the curtain airbag engages the vehicle body. As a result, the curved portion of the curtain airbag is lifted through the storage recess.

Here, when viewed from the axial direction of the curtain airbag, the upper locking portion is the axial portion of the curtain airbag that is not stored in the storage recess and the axial portion of the curtain airbag that is stored in the storage recess. It is provided on a virtual straight line connecting . That is, the upper engaging portion is provided along the direction in which the load from the curtain airbag to the case is constantly applied toward the vehicle downward side.

Therefore, the curved portion of the curtain airbag can be lifted efficiently by the upper engaging portion, compared to the case where the upper engaging portion is provided deviated from the imaginary straight line. As a result, the downward load of the vehicle, which is always applied to the case containing the roll-folded curtain airbag by the curtain airbag, is efficiently reduced.

Further, the mounting structure for a vehicle curtain airbag device according to claim 2 is the mounting structure for a vehicle curtain airbag device according to claim 1, wherein the lower locking portion extends in the vehicle front-rear direction. It is composed of a pair of elastically deformable lower locking claws.

According to the second aspect of the invention, the lower locking portion is composed of a pair of lower locking claws that are elastically deformable in the longitudinal direction of the vehicle. Therefore, compared to the case where the lower engaging portion is composed of a pair of lower engaging claws that can be elastically deformed in the vertical direction of the vehicle, the lower engaging claws do not return while maintaining the elastically deformed state. Low possibility of creep phenomenon. As a result, a creep phenomenon occurs in the lower engaging claw, and rattling may occur between the lower engaging claw and the lower engaged portion to which the lower engaging claw is engaged. Therefore, when the vehicle is running or the like, the occurrence of abnormal noise caused by the rattling is suppressed.

A vehicle curtain airbag device mounting structure according to claim 3 is the vehicle curtain airbag device mounting structure according to claim 1 or 2, wherein the upper locking portion It is composed of a pair of upper locking claws that are elastically deformable in the width direction or the vehicle longitudinal direction.

According to the third aspect of the invention, the upper locking portion is composed of a pair of upper locking claws elastically deformable in the vehicle width direction or the vehicle longitudinal direction. Therefore, compared to the case where the upper engaging portion is composed of a pair of upper engaging claws that are elastically deformable in the vertical direction of the vehicle, the creep phenomenon in which the upper engaging claws maintain their elastically deformed state and do not return does not occur. less likely to occur. Therefore, the occurrence of a creep phenomenon in the upper locking claw and the rattling between the upper locking claw and the upper engaged portion to which the upper locking claw is locked can be suppressed, and the vehicle can be secured. This suppresses the occurrence of abnormal noise caused by the rattling when the vehicle is running. The term "vehicle width direction" as used herein also includes a substantially vehicle width direction that is slightly deviated from the accurate vehicle width direction.

As described above, according to the present invention, it is possible to efficiently reduce the downward load of the vehicle that is constantly applied to the case containing the roll-folded curtain airbag by the curtain airbag.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic side view which shows the mounting structure of the curtain airbag apparatus for vehicles based on this embodiment seen from the vehicle interior side. FIG. 3 is a schematic enlarged side view showing a housing recess of a case that constitutes the mounting structure according to the present embodiment, viewed from the passenger compartment side; FIG. 3 is a schematic enlarged side view showing a housing recess of a case that constitutes the mounting structure according to the present embodiment, viewed from the outside of the vehicle; FIG. 2 is an enlarged cross-sectional view taken along the line XX of FIG. 1 showing the curtain airbag housed in the housing recess of the case that constitutes the mounting structure according to the present embodiment; FIG. 4 is a schematic side view showing an enlarged shape of an opening into which a lower engaging claw is inserted, which is formed in a case that constitutes the mounting structure according to the present embodiment, together with a cross section of the lower engaging claw.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings. For convenience of explanation, the arrow UP shown in each drawing is the upward direction of the vehicle, the arrow FR is the forward direction of the vehicle, and the arrow RH is the right direction of the vehicle. Therefore, in the following description, when directions such as up/down, front/rear, and left/right are indicated unless otherwise specified, they indicate up/down, front/rear, and left/right of the vehicle. Moreover, the left-right direction is synonymous with the vehicle width direction.

As shown in FIG. 1, a mounting structure 10 for a vehicle curtain airbag device 30 is applied to a sedan type vehicle 12, for example. The vehicle curtain airbag device 30 is provided on a roof side portion 14 including the rear end side of a front pillar (hereinafter referred to as "A pillar") 22 and the front end side of a rear pillar (not shown) (hereinafter referred to as "C pillar"). . A roof side rail 16 (see FIG. 4), which constitutes the framework of the roof side portion 14 together with the rear end side of the A pillar 22 and the front end side of the C pillar, extends along the front-rear direction of the roof side portion 14 . .

As shown in FIG. 4, the roof side rail 16 has an inner panel 16A and an outer panel 16B, and the upper end of the inner panel 16A and the upper end of the outer panel 16B are joined together. A lower end portion of the inner panel 16A and a lower end portion of the outer panel 16B are joined with an upper end portion of an inner panel 26 constituting a center pillar (hereinafter referred to as "B pillar") 24 interposed therebetween. Thereby, the roof side rail 16 is formed in a closed cross-sectional shape.

As shown in FIG. 1 , the vehicle curtain airbag device 30 includes a curtain airbag 32 and an inflator 31 as a gas generator that instantaneously supplies gas to the interior of the curtain airbag 32 . Normally, the curtain airbag 32 extends along the front-rear direction in a roll-folded state with the front-rear direction as the axial direction, and is accommodated in the roof side portion 14 together with the inflator 31 .

That is, the curtain airbag 32 extends from the rear end side of the A pillar 22 to the front end side of the C pillar along the roof side rail 16 and is provided inside the roof side rail 16 in the vehicle width direction. (See Figure 4). The curtain airbag 32 in the stored state includes an A-pillar garnish (not shown) provided on the A-pillar 22, a roof side garnish 18 (see FIG. 4) provided on the vehicle interior side of the roof side portion 14, and a C It is covered with a C-pillar garnish (not shown) provided on the pillar.

In addition, the curtain airbag 32 is supplied with gas from the inflator 31 at the time of a side collision, an oblique collision, or a rollover of the vehicle 12, so that the head of the occupant P seated on the vehicle seat 20 is protected. It is designed to be inflated and deployed like a curtain between Ph and the side of the passenger compartment. That is, the curtain airbag 32 deploys downward along the front side glass Wf, the upper portion of the B-pillar 24, and the rear side glass Wr to restrain and protect the head Ph of the occupant P.

The curtain airbag 32 is integrally hollow-woven by, for example, a One Piece Woven (abbreviated as OPW) method. In the OPW method, a jacquard loom is used to weave two base fabrics at the same time, and multiple weaves are applied to necessary portions to form a seamless bag body. The surface of the curtain airbag 32 is coated with, for example, silicon in order to prevent leakage of gas.

The method of manufacturing the curtain airbag 32 is not limited to the OPW method described above. For example, the curtain airbag 32 may be manufactured by sewing one or more sheets of base cloth formed by cutting out a polyamide-based or polyester-based cloth material into a bag shape.

A plurality of tabs 34 are provided on the upper edge portion 32A of the curtain airbag 32 at predetermined intervals along the front-rear direction. Each tab 34 is formed by cutting a cloth material similar to the base cloth of the curtain airbag 32 into a rectangular shape, and is connected to the upper edge portion 32A of the curtain airbag 32 by a connecting means such as sewing. there is Each tab 34 may be configured to integrally extend upward from the upper edge portion 32A of the curtain airbag 32 .

Each tab 34 is formed with a locking hole 34A. The curtain airbag 32 is attached to the rear end side of the A-pillar 22 by a fastener such as a clip (not shown) inserted through each locking hole 34A. It is fixed to the front end side of the C-pillar. Note that the fastener may be a bolt or the like.

As shown in FIGS. 1 to 4, the roll-folded curtain airbag 32 is housed and held in a case 40 extending in the longitudinal direction. The case 40 is formed in a substantially "U"-shaped cross section so as to open inward in the vehicle width direction, and in a substantially central portion in the front-rear direction of the case 40, there is a storage recessed portion 50, also called a jump platform, which rises upward. integrally formed.

That is, a substantially central portion (hereinafter referred to as "central portion") 32C of the curtain airbag 32 in the front-rear direction is accommodated in the accommodation recess 50 and held in a state of being lifted upward. As a result, when the curtain airbag 32 inflates and deploys downward, the central portion 32C is prevented from being caught on the upper end portion of the B-pillar garnish (not shown).

As shown in FIG. 2, by lifting the center portion 32C of the curtain airbag 32 upward, the portions on the front side and the rear side of the center portion 32C are curved. be. Therefore, hereinafter, the curved portion is referred to as a curved portion 32V. Also, the curtain airbag 32 is positioned on the front side and rear side of the curved portion 32V except for the upwardly raised central portion 32C, and is positioned below the central portion 32C. Let each part be a general part 32B.

As shown in FIGS. 2 to 4, a support portion 42 extending downward is integrally provided on the lower surface of the case 40 in the area where the storage recess 50 is formed. On the outer surface of the support portion 42, a pair of lower locking claws 44 as lower locking portions that are locked to the inner panel 26 of the B-pillar 24 as an example of the vehicle body are directed outward in the vehicle width direction. are integrally protruding. The pair of lower locking claws 44 are projecting at a predetermined distance in the front-rear direction so as to be elastically deformable in the front-rear direction. They protrude forward and rearward, respectively, so that they can be locked to each other.

As shown in FIG. 5, the inner panel 26 of the B-pillar 24 is formed with a rectangular opening 26A whose longitudinal direction is the vertical direction. 26A. The tips of the pair of lower locking claws 44 inserted into the opening 26A are erected outward in the vehicle width direction along the peripheral edge (at least the front peripheral edge and the rear peripheral edge) of the opening 26A. It is adapted to be locked to a lower locking projection 28 (see also FIG. 4) as a lower locked portion.

The length of the opening 26A in the vertical direction is longer (larger) than the length of the pair of lower locking claws 44 along the vertical direction. As a result, when the upper locking claw 48, which will be described later, is locked by the upper locking projection 38, which will be described later, the lower locking claw 44 can move upward within the opening 26A. ing. In other words, even if the case 40 is lifted upward in order to engage the upper locking claws 48, the upward movement of the case 40 is prevented by the lower locking claws 44 inserted into the openings 26A. so as not to interfere.

On the other hand, as shown in FIGS. 2 to 4, on the upper surface of the case 40 in the region where the storage recess 50 is formed, the portions corresponding to the curved portions 32V on the front side and the rear side (the portions of the curved portions 32V) directly above) are integrally provided with protruding portions 46 protruding upward. On the upper surface of each projecting portion 46, a pair of upper engaging claws 48 as upper engaging portions to be engaged with the bracket 36 as an example of the vehicle body are integrally projected upward. there is The pair of upper locking claws 48 are formed apart from each other by a predetermined distance in the vehicle width direction so as to be elastically deformable in the vehicle width direction. They protrude outward in the vehicle width direction and inward in the vehicle width direction so as to be lockable.

As shown in FIG. 4, the bracket 36 is a flat plate that is bent into a substantially "S" shape when viewed from the front-rear direction. The lower end of the bracket 36 is joined to the lower part of the roof side rail 16 (inner panel 16A), and the upper end of the bracket 36 is attached to the lower surface of the roof reinforcement (not shown) extending in the vehicle width direction. are spliced.

Two rectangular openings 36A are formed in the middle of the bracket 36 in the vehicle width direction, and are separated from each other by a predetermined distance in the front-rear direction. 36A to be inserted. The tip of each pair of upper locking claws 48 inserted into each opening 36A extends upward along the peripheral edge of each opening 36A (at least the outer peripheral edge in the vehicle width direction and the inner peripheral edge in the vehicle width direction). It is adapted to be locked to each upper locking projection 38 as an upper locked portion which is erected facing toward.

Also, as shown in FIG. 4 , each pair of upper locking claws 48 is located on the side of the curtain airbag 32 that is not housed in the housing recess 50 of the case 40 when viewed from the front-rear direction (the axial direction of the curtain airbag 32 ). and the central portion 32C of the curtain airbag 32 housed in the housing recess 50 of the case 40. That is, the imaginary straight line K passes through the middle portion of the pair of upper locking claws 48 in the vehicle width direction.

It should be noted that the downward direction on the imaginary straight line K is the input direction of the load that is always directed downward by the curtain airbag 32 with respect to the storage recess 50 of the case 40 . Specifically, since the roll-folded curtain airbag 32 has a certain degree of hardness (rigidity), each curved portion 32V of the curtain airbag 32 stored in the storage recess 50 of the case 40 , the followability to the storage recess 50 is not good. Therefore, the curtain airbag 32 stored in the storage recess 50 of the case 40 always presses the storage recess 50 downward, and a downward load is always input to the storage recess 50 . become.

Further, as shown in FIGS. 1 to 3, the curtain airbag 32 stored in the storage recess 50 of the case 40 includes a plurality of (for example, three) holding bands provided at predetermined intervals in the front-rear direction. 52, it is held so as not to drop out of the storage recess 50. As shown in FIG. Each holding band 52 is wound around a portion of the curtain airbag 32 in the circumferential direction, and is configured such that its lower end portion is separated from the case 40 when the curtain airbag 32 is inflated and deployed.

Next, the operation of the mounting structure 10 for the vehicle curtain airbag device 30 according to the present embodiment configured as described above will be described.

As shown in FIGS. 1 to 4, a lower locking claw 44 provided on a support portion 42 extending downward from the lower surface of the case 40 engages the inner panel 26 (lower locking projection 28). By being stopped, the central portion 32C of the curtain airbag 32 is supported from below via the storage recess 50 of the case 40. As shown in FIG.

Each of the upper locking claws 48 projecting upward from the upper surface of the case 40 and corresponding to the curved portions 32V on the front side and the rear side of the central portion 32C of the curtain airbag 32 is attached to the bracket 36 ( Each curved portion 32V of the curtain airbag 32 is lifted through the housing recess 50 of the case 40 by being locked by the upper locking projection 38).

Here, as shown in FIG. 4, each of the upper locking claws 48 is located between the shaft center portion of the general portion 32B of the curtain airbag 32 that is not housed in the housing recess 50 of the case 40 and the housing recess 50 of the case 40. It is provided on an imaginary straight line K connecting the axis of the central portion 32C of the curtain airbag 32 housed therein. In other words, each of the upper locking claws 48 is provided along the input direction of the downward load of the curtain airbag 32 to the housing recess 50 of the case 40 .

Therefore, compared to the case where each upper locking claw 48 is provided deviated from the imaginary straight line K, each curved portion 32V of the curtain airbag 32 can be engaged with each upper side through the housing recess 50 of the case 40. The detent claws 48 enable efficient lifting. As a result, it is possible to efficiently reduce the downward load that is constantly applied by the curtain airbag 32 to the storage recess 50 of the case 40 that stores the roll-folded curtain airbag 32 .

In addition, since the pair of lower locking claws 44 are configured to be elastically deformable in the front-rear direction, compared to the case where they are configured to be elastically deformable in the vertical direction, the elastically deformed state is maintained and returned. It is less likely to cause a creep phenomenon that disappears. Therefore, a creep phenomenon occurs in the lower locking claw 44, and rattling occurs between the lower locking claw 44 and the lower locking projection 28 to which the lower locking claw 44 is locked. It is possible to suppress or prevent the stowing, and it is possible to suppress or prevent the occurrence of abnormal noise caused by this when the vehicle 12 is running.

Furthermore, since the pair of upper locking claws 48 are configured to be elastically deformable in the vehicle width direction, the elastically deformed state is maintained and returned, compared to the case where they are configured to be elastically deformable in the vertical direction. It is less likely to cause a creep phenomenon that disappears. Therefore, it is possible to prevent the upper locking claw 48 from creeping and rattling between the upper locking claw 48 and the upper locking projection 38 to which the upper locking claw 48 is locked. Or, it can be prevented, and when the vehicle 12 is running or the like, it is possible to suppress or prevent the occurrence of abnormal noise caused by it.

Further, as shown in FIG. 5, the opening 26A formed in the inner panel 26 of the B-pillar 24 has a length in the vertical direction equal to the length of the pair of lower locking claws 44 in the vertical direction. It's longer than it should be. Therefore, even if the vertical position of the lower engaging claw 44 relative to the opening 26A is slightly deviated due to an error in molding the case 40 or the like, the lower engaging claw 44 can be inserted into the opening 26A. can be done.

Further, even if the case 40 is lifted upward in order to engage the upper locking claw 48 with the upper locking projection 38, the lower locking claw 44 cannot be moved upward within the opening 26A. can. Therefore, the problem that the lower locking claws 44 hinder the upward movement of the case 40 does not occur. That is, even the case 40 having such a configuration can be appropriately provided on the roof side portion 14 .

The mounting structure 10 for the vehicle curtain airbag device 30 according to the present embodiment has been described above with reference to the drawings. The design can be changed as appropriate without departing from the gist of the invention. For example, the pair of upper locking claws 48 are not limited to being elastically deformable in the vehicle width direction, and may be elastically deformable in the longitudinal direction.

Even when the pair of upper locking claws 48 are configured to be elastically deformable in the front-rear direction, compared to the case where the pair of upper locking claws 48 are configured to be elastically deformable in the vertical direction, the elastically deformed state is maintained and the creep that does not return occurs. less likely to occur. Therefore, it is possible to prevent the upper locking claw 48 from creeping and rattling between the upper locking claw 48 and the upper locking projection 38 to which the upper locking claw 48 is locked. Or, it can be prevented, and when the vehicle 12 is running or the like, it is possible to suppress or prevent the occurrence of abnormal noise caused by it.

Further, the lower engaging portion is not limited to the one composed of the pair of lower engaging claws 44 elastically deformable in the front-rear direction. For example, the lower locking portions are formed in the inner panel 26 at predetermined intervals in the front-rear direction. It may be composed of a side locking piece (not shown) or the like.

Similarly, the upper locking portion is not limited to a pair of upper locking claws 48 elastically deformable in the vehicle width direction or the front-rear direction. The upper engaging portion may be formed in such a shape that the portion corresponding to each curved portion 32V of the curtain airbag 32 in the case 40 can be lifted. It may be formed in a shape such as a hook that can be formed.

10 Mounting structure 12 Vehicle 14 Roof side part 26 Inner panel (vehicle body)
30 Curtain airbag device for vehicle 32 Curtain airbag 32C Central part (approximately central part in vehicle front-rear direction)
32V bending part 36 bracket (body)
40 Case 42 Supporting Part 44 Lower Locking Claw (Lower Locking Part)
48 upper locking claw (upper locking portion)
50 Storage recess K Virtual straight line

Claims (3)

A case made of resin, which is provided in a roof side portion of a vehicle and has a storage recess for lifting and storing a substantially central portion in the vehicle front-rear direction of a curtain airbag rolled with the vehicle front-rear direction as an axial direction;
a lower engaging portion provided in a support portion extending downward from the lower surface of the case and engaged with the vehicle body;
An upper locking portion projecting upward from the upper surface of the case and corresponding to curved portions on the front side and the rear side of the vehicle relative to the center portion of the curtain airbag in the vehicle front-rear direction, and locked to the vehicle body. Department and
with
When viewed from the axial direction of the roll-folded curtain airbag, the axial center portion of the curtain airbag that is not stored in the storage recess and the axial center portion of the curtain airbag that is stored in the storage recess. A mounting structure for a curtain airbag device for a vehicle, wherein the upper locking portion is provided on a virtual straight line connecting . 2. A mounting structure for a curtain airbag device for a vehicle according to claim 1, wherein said lower engaging portion comprises a pair of lower engaging claws which are elastically deformable in the longitudinal direction of the vehicle. 3. A mounting structure for a curtain airbag device for a vehicle according to claim 1, wherein the upper locking portion is composed of a pair of upper locking claws elastically deformable in the vehicle width direction or the vehicle longitudinal direction.

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