JP6079732B2 - Vehicle seat belt retractor mounting structure - Google Patents

Description

  The present invention relates to a seat belt retractor mounting structure for a vehicle, and more particularly to a seat belt retractor mounting structure for a vehicle including a seat belt retractor disposed near an opening that can be opened and closed by a lift gate.

  2. Description of the Related Art Conventionally, a seat belt retractor mounting structure for a vehicle including an opening that can be opened and closed by a lift gate (also referred to as a back door) and a seat belt retractor disposed near the opening is known. The belt pulled out from the retractor (also referred to as webbing) can restrain the occupant by engaging a tongue and a buckle attached to the front end of the belt.

Generally, the retractor is stored in a pillar disposed on the side of the seat.
However, in a vehicle provided with three rows of seats in the vehicle, there may be a case where a pillar that can store the retractor cannot be disposed on the side of the rearmost seat (third row seat).
As a retractor installation method, there are a belt-in-seat method in which a retractor is built in a seat and a vehicle body attachment method in which a retractor is attached to a vehicle body wall such as a luggage compartment.
The belt-in-seat system is advantageous in terms of facilitating the setting of the seat belt anchor position and securing the cargo space, but has a problem in terms of increasing the weight of the seat frame and increasing the cost of the seat.
The vehicle body mounting method is more advantageous than the belt-in-seat method in terms of reducing the weight of the seat because the retractor is mounted on the vehicle body via the retractor mounting bracket.

The vehicle seat belt retractor mounting structure of Patent Document 1 is provided with a curved reinforcing member extending in the vertical direction for connecting the rear portion of the inner wall of the rear wheel house and the rear pillar, and a bracket member for supporting and fixing the retractor is reinforced. It is arranged over the member and the rear pillar.
By installing this reinforcing member, the mounting strength of the retractor to the vehicle body is improved while receiving the load transmitted from the rear suspension damper.

JP 2007-38983 A

In the vehicle seat belt retractor mounting structure disclosed in Patent Document 1, the mounting position of the retractor mounting bracket can be set on an extension line connecting the retractor and the seat belt anchor, so that the load applied to the occupant, that is, input to the so-called retractor. The input load can be efficiently transmitted to the vehicle body side reinforcing member via the retractor mounting bracket.
However, in this seat belt retractor mounting structure for a vehicle, since the reinforcing member occupies the lower region of the luggage compartment, it is difficult to increase the effective luggage compartment space for loading the luggage.

Therefore, in order to eliminate the reinforcing member, it is conceivable to fix the retractor mounting bracket to a vehicle body strength member disposed near the rear floor or near the lift gate opening.
However, when adopting the vehicle body mounting method in which the reinforcing member is eliminated, the following problems may occur.
When the retractor mounting bracket is fixed to the vicinity of the rear floor, for example, the rear side frame or the cross member, the retractor occupies the lower region of the luggage compartment, so that there is a possibility that the effective luggage compartment space for loading the luggage may be reduced. When equipped with a highly functional retractor having a plurality of mechanisms and sensors, the retractor itself increases in size, further reducing the cargo space.
On the other hand, when the retractor mounting bracket is fixed in the vicinity of the lift gate opening, for example, the upper end portion of the rear pillar, the retractor can be disposed in the upper region of the cargo compartment without occupying the lower region of the cargo compartment. An effective luggage space can be secured.

  However, when the retractor mounting bracket is fixed near the lift gate opening, the mounting position of the retractor mounting bracket can be set on the extension line connecting the retractor and the seat belt anchor due to the structure of the lift gate opening. Since it is not easy, the retractor supporting position and the mounting position of the retractor mounting bracket are in a cantilever state in which they are largely offset in the front-rear direction. Therefore, the rotational moment accompanying the input load to the retractor acts on the retractor mounting bracket, and the input load to the retractor cannot be efficiently distributed and transmitted to the vehicle body side, and the retractor mounting strength is sufficient. There is a possibility that it cannot be secured.

  An object of the present invention is to provide a vehicle seat belt retractor mounting structure and the like that can ensure both a cargo space and a retractor mounting strength.

  The seatbelt retractor mounting structure for a vehicle according to claim 1 is formed so that the front side is shifted upward in a side view and can be opened and closed by a lift gate, and the seatbelt retractor disposed in the vicinity of the opening. In the vehicle seat belt retractor mounting structure, the opening has an opening sidewall extending in the vehicle longitudinal direction at least substantially perpendicular to the vehicle width direction, and extends obliquely from the front end of the opening sidewall. A pair of vertical wall portions that are inclined to each other in the vehicle width direction and a bottom wall portion that connects the lower end portions of the pair of vertical wall portions and opens upward in a front view. And the retractor mounting bracket is disposed so as to protrude forward from the position of the upper end side of the opening side wall and to the front of the vehicle body. The inner vertical wall portion on the inner side in the vehicle width direction is joined to the opening side wall portion, and the outer vertical wall portion on the outer side in the vehicle width direction is joined to the inclined wall portion among the pair of vertical wall portions. It is characterized by that.

In this vehicle seat belt retractor mounting structure, the retractor mounting bracket is disposed so as to protrude forward from the upper end position of the opening side wall, so that the retractor occupies the lower region of the cargo compartment effective for loading the load. The cargo space can be secured without doing so.
The retractor mounting bracket is opened upward in a front view by a pair of vertical wall portions formed opposite to each other in the vehicle width direction and a bottom wall portion connecting lower ends of the pair of vertical wall portions. Since it is formed in a U shape, the rigidity of the retractor mounting bracket can be increased by shape setting. Moreover, the bracket for mounting the retractor is made rigid, and the inner vertical wall portion on the inner side in the vehicle width direction is joined to the opening side wall portion and the outer vertical wall portion on the outer side in the vehicle width direction is joined to the inclined wall portion. Even in a cantilever state where a rotational moment acts on the tip of the bracket, the input load to the retractor is distributed and transmitted to the upper end position of the rigid opening through the highly rigid retractor mounting bracket. Can

According to a second aspect of the present invention, in the first aspect of the invention, a reinforcing flange portion extending upward in a state of being bent from a middle step portion of the inner vertical wall portion is provided, and the reinforcing flange portion is joined to the inclined wall portion. It is characterized by that.
According to this, the upward input load to the retractor can be efficiently supported as a compression load, and the rotational movement around the mounting position of the retractor mounting bracket can be reliably suppressed.

According to a third aspect of the present invention, in the second aspect of the present invention, a part of the peripheral edge of the opening is configured by a closed cross-section member including the open side wall and the inclined wall, and the closed cross-section member includes the A reinforcing member that reinforces the vicinity of the boundary between the opening side wall portion and the inclined wall portion is provided, and the reinforcing flange portion is joined to the reinforcing member via the inclined wall portion.
According to the above configuration, the support rigidity of the retractor mounting bracket can be increased, and the upward input load to the retractor can be reliably supported by the peripheral edge of the opening.

According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the retractor mounting bracket includes a connecting wall portion that connects the inner vertical wall portion and the outer vertical wall portion in a substantially orthogonal shape. It is characterized by that.
According to this, the rigidity of the retractor mounting bracket can be increased, and the generation of abnormal noise due to the surface vibration of both the vertical wall portions can be prevented.

  According to the seat belt retractor mounting structure for a vehicle of the present invention, it is possible to achieve both securing of the luggage space and securing of the retractor mounting strength.

1 is a longitudinal sectional view of a rear part of a vehicle body viewed from the left side of a vehicle according to a first embodiment. It is the perspective view seen from the left side rear of a vehicle. FIG. 2 is an enlarged view of a main part of FIG. 1 with a rear seat omitted. FIG. 4 is a front view of FIG. 3. FIG. 4 is a bottom view of FIG. 3. It is the VI-VI sectional view taken on the line of FIG. It is the VII-VII sectional view taken on the line of FIG. It is a left view of a reinforcing member and a bracket. It is a front view of FIG. It is a top view of FIG. It is the perspective view seen from the left front of FIG. It is a disassembled perspective view of a bracket. FIG. 4 is a view corresponding to FIG. 3 with the inner panel omitted. FIG. 14 is a front view of FIG. 13.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
The following description exemplifies a case where the present invention is applied to a vehicle, and does not limit the present invention, its application, or its use. In the figure, the direction of arrow F is assumed to be the front, and the direction of arrow L is assumed to be the left.

Hereinafter, Example 1 of the present invention will be described with reference to FIGS.
As shown in FIGS. 1 and 2, the vehicle V constitutes a floor panel 1 that constitutes the floor surface of the passenger compartment, a pair of left and right side panels 2 that constitute the side walls of the vehicle body, and a ceiling wall of the passenger compartment. A roof portion 3, a lift gate 4 constituting the rear wall of the vehicle body, an opening 5 that can be opened and closed by the lift gate 4, and a pair of left and right retractors 6 (seat belts) for restraining an occupant seated on the rear seat 8. And a pair of left and right brackets 7 (retractor mounting brackets) for mounting the pair of retractors 6 on the vehicle body side.

First, main components of the vehicle V will be described.
The floor panel 1 is provided across a pair of left and right rear side frames (not shown) and extends in the front-rear direction, and forms the bottom surface of the vehicle V.
The floor panel 1 is provided with a kick-up portion 1a that is inclined in the rearward and upward direction and is formed in the middle in the front-rear direction, and a rear floor 1b that is used to form a cargo floor in the rear region of the kick-up portion 1a. It has been. A pair of left and right rear seats 8 on which a rear occupant can be seated are supported in the vicinity of the kick-up portion 1a.
These rear seats 8 are each formed by a seat cushion 8a fixed in the vicinity of the kick-up portion 1a and a seat back 8b pivotally supported at the rear end portion of the seat cushion 8a.

Next, the pair of left and right side panels 2 will be described.
In addition, since each pair of left and right components has a bilaterally symmetric structure, the right component will be mainly described below.
As shown in FIGS. 1-7, the side panel 2 is comprised from the outer panel 2a which forms a vehicle body outer wall, and the inner panel 2b which forms a vehicle interior wall.
The inner panel 2 b is formed of a steel plate having a predetermined thickness, and substantially the entire region on the vehicle compartment side surface is covered with the trim 9. A rear wheel house 10 is formed at a portion corresponding to the top of the kick-up portion 1a of the inner panel 2b. The rear wheel house 10 is formed by a wheel house outer (not shown) that bulges rightward from the lower end side portion of the inner panel 2b, and a wheel house inner 10a that bulges leftward from the lower end side portion of the inner panel 2b. Has been.

  The side panel 2 divides the rear entrance / exit 11 through which a passenger in the rear seat 8 can get on / off, the quarter window opening 12 to which the rear quarter window glass is attached, and the rear entrance / exit 11 and the quarter window opening 12. The side pillar 13 has a closed cross section extending in the vertical direction, and the rear pillar 14 (closed cross section member) having a closed cross section extending in the vertical direction by forming left and right peripheral edge portions of the opening 5 is provided.

As shown in FIGS. 6 and 7, the rear pillar 14 is disposed in the outer section 14a, an inner section 14b that forms a closed section C1 extending in the vertical direction in cooperation with the outer section 14a, and the closed section C1. The pillar reinforcement 15 is provided.
The rear pillar 14 is formed so as to extend vertically upward from the rear end portion of the rear floor 1b and to move upward from the middle step portion to the rear header 16 toward the front side in a side view.
The pillar reinforcement 15 is formed in a substantially hat shape, and a front end flange portion 15a and a rear end flange portion 15b extending in the vertical direction are provided on the front end side portion and the rear end side portion, respectively.
The front end flange portion 15a is joined to the back surface of the inner portion 14b, and the rear end flange portion 15b is sandwiched between both rear end flange portions of the outer portion 14a and the inner portion 14b, whereby the pillar reinforcement 15 and the inner portion 14b. And a closed cross section C2 extending in the vertical direction is configured.

As shown in FIGS. 1 and 2, the roof portion 3 includes a rear header 16 having a closed cross section extending in the vehicle width direction at the rear upper end position of the vehicle body, a front header (not shown) at the front upper end position of the vehicle body, and the rear header 16. It includes a pair of left and right roof side rails (not shown) that connect the left and right ends in the front-rear direction, a roof panel 17 that covers the ceiling space, and the like.
The rear header 16 forms an upper end side peripheral portion of the opening 5. A rear end side portion of the rear header 16 is provided with a pair of left and right pivotal support mechanisms (not shown) that pivotably support the lift gate 4 in the vertical direction.

Next, the opening 5 will be described.
As shown in FIGS. 1 and 2, the opening 5 is formed so as to extend vertically upward from the rear end of the rear floor 1 b and to move upward toward the front side from the middle step to the rear header 16 in a side view. Has been. The opening 5 is formed in a substantially trapezoidal shape when viewed from the back.
That is, the peripheral portion of the opening 5 is formed in a substantially annular closed cross-sectional structure by a rear header 16 having a closed cross section, a pair of left and right closed rear pillars 14 and the like.
A latch mechanism (not shown) that can be engaged with a striker (not shown) attached to the lower end of the lift gate 4 is provided at the center of the lower end of the opening 5.

As shown in FIG. 6 and FIG. 7, the opening 5 forms an opening side wall portion 5 a constituting the rear end side portion of the inner portion 14 b and a front end portion of the opening side wall portion 5 a and constitutes the remaining portion of the inner portion 14 b. An inclined wall portion 5b is provided.
The opening side wall 5a is formed so as to extend in the front-rear direction substantially orthogonal to the vehicle width direction. A seat belt anchor 18 is mounted on the opening side wall 5a at a position corresponding to the vicinity of the upper end of the seat back 8b. The inclined wall portion 5b extends in an inclined shape so as to move to the right from the front end portion of the opening side wall portion 5a toward the front side.

  As shown in FIG. 7, a plate-like reinforcing member 19 extending in the vertical direction is provided in the closed cross section C <b> 2 of the rear pillar 14. The reinforcing member 19 is formed in a substantially L-shaped horizontal cross section, and at the attachment position of the bracket 7 (inclined portion above the middle step portion of the rear pillar 14), the boundary portion between the opening side wall portion 5a and the inclined wall portion 5b, and It joins by welding to the back surface of the inner part 14b so that the boundary vicinity part may be reinforced.

The retractor 6 is an emergency lock type seat belt retractor (ELR).
The retractor 6 includes a belt-like belt 6a attached to an occupant seated on a rear seat 8, a cylindrical spool (not shown) capable of winding the belt 6a, and a pretensioner for winding the belt 6a. A mechanism (not shown), a lock mechanism (not shown) that restricts movement of the belt 6a when a predetermined load is applied to the belt 6a, a plurality of sensors (not shown), and the like are provided.

Next, the bracket 7 will be described.
As shown in FIGS. 1, 3, and 13, the bracket 7 has an upper end side of the opening side wall portion 5 a in the inclined portion above the middle step portion of the rear pillar 14 in order to arrange the retractor 6 in the vicinity of the opening portion 5. It is attached so as to protrude forward from the position. The bracket 7 is formed in a substantially U-shaped vertical section opened upward in a front view, and is formed in a tapered triangle shape so that the lateral width in the front side becomes narrower in a plan view.
The bracket 7 is composed of two members, an inner member 21 disposed on the inner side in the vehicle width direction and an outer member 22 disposed on the outer side in the vehicle width direction.

As shown in FIGS. 8 to 12, the inner member 21 is integrally formed in a substantially L shape in front view by pressing a steel plate.
The inner member 21 has an inner vertical wall portion 21a, an inner bottom wall portion 21b extending rightward from the lower end portion of the inner vertical wall portion 21a, and a substantially orthogonal shape from the front middle step portion of the inner vertical wall portion 21a. And a reinforcing flange portion 21c extending upward in a state bent to the right.

The inner vertical wall portion 21a is formed in a substantially triangular shape in a side view, and has an inner joint portion 21d provided at a rear upper end portion and a plurality of latches bent to the left from the front end portion in a substantially orthogonal shape. It has a portion 21e, a luggage hook hole 21f provided in the rear end portion, and the like.
As shown in FIG. 7, the inner joint portion 21d is triple joined to the reinforcing member 19 by welding with the opening side wall portion 5a interposed therebetween.
A plurality of, for example, a pair of front and rear locking portions 21 e are formed so as to be able to be inserted into mounting holes provided in the retractor 6, and constitute a mechanism for positioning and preventing rotation of the retractor 6 with respect to the bracket 7. After engaging the pair of locking portions 21e in the mounting holes of the retractor 6, the retractor 6 is fixed to the bracket 7 by fixing means such as bolts.
The luggage hook hole 21f is formed so as to be capable of locking a fixing tool for fixing the luggage accommodated in the luggage compartment.

The inner bottom wall portion 21b is formed in a substantially elongated rectangular shape in plan view.
The reinforcing flange portion 21c is bent to the right from the middle portion of the front side portion of the inner vertical wall portion 21a between the inner joint portion 21d and the locking portion 21e so as to be bent in the right direction with respect to the inner joint portion 21d. So as to extend substantially upward. The reinforcing flange portion 21c is formed with a front joint portion 21g extending obliquely forward from the upper end portion.
As shown in FIGS. 3, 8 to 11, and 13, the front joint portion 21 g is triple joined to the reinforcing member 19 by welding with the inclined wall portion 5 b interposed therebetween.

As shown in FIGS. 9 to 12, the outer member 22 is integrally formed in a substantially crank shape in a rear view by pressing a steel plate.
The outer member 22 has an outer vertical wall portion 22a, an outer bottom wall portion 22b extending leftward from the lower end portion of the outer vertical wall portion 22a in a substantially orthogonal shape, and a substantially orthogonal shape from a middle portion on the front side of the outer vertical wall portion 22a. Is provided with a connecting wall portion 22c extending leftward.

The outer vertical wall portion 22a is formed in a substantially triangular shape smaller than the inner vertical wall portion 21a in a side view, and is disposed so as to face the inner vertical wall portion 21a in the vehicle width direction.
The outer vertical wall portion 22a has an outer joint portion 22d extending rightward from the upper end portion.
As shown in FIGS. 7 and 14, the outer joint portion 22 d is triple joined to the front end flange portion 15 a of the pillar reinforcement 15 by welding via the inclined wall portion 5 b.

The outer bottom wall portion 22b is formed so as to be wider than the left and right width of the inner bottom wall portion 21b in a plan view and to be narrower toward the front side. The outer bottom wall portion 22b is joined to the inner bottom wall portion 21b in the front-rear direction.
The outer bottom wall portion 22b has a rear joint portion 22e extending obliquely downward from the rear end portion.
The rear side joining portion 22e is joined to the inclined wall portion 5b by welding, and the left end side portion of the rear side joining portion 22e is triple joined to the reinforcing member 19 via the inclined wall portion 5b. Yes.

As shown in FIGS. 9, 10, and 12, the connecting wall portion 22 c is formed in a substantially trapezoidal shape and divides the front end side portion of the bracket 7 and the rear side portion from the front end side portion in the front and rear direction. Is configured. The connection wall portion 22c includes a connection joint portion 22f extending forward from the lower end portion and a connection joint portion 22g extending forward from the left end.
The connecting joint portion 22f is joined to the front end side portion of the inner bottom wall portion 21b, and the connecting joint portion 22g is joined to the front end side portion of the inner vertical wall portion 21a.

As described above, since the bracket 7 is formed in a substantially U-shape when viewed from the front and includes the connecting wall portion 22c having a node function in the middle in the front-rear direction, the cross-section collapse of the bracket 7 can be suppressed, The rigidity of the bracket 7 can be improved.
The mounting position of the bracket 7 (the inner joint portion 21d, the front joint portion 21g, the outer joint portion 22d, the rear joint portion 22e) is set at the boundary portion between the highly rigid opening side wall portion 5a and the inclined wall portion 5b and the vicinity of the boundary portion. By doing so, the support rigidity of the bracket 7 is ensured.
In addition, since the bracket 7 is formed in a tapered triangle shape so that the lateral width in the front side becomes narrower in plan view, the input load input to the front end portion can be uniformly distributed to the vehicle body.
Therefore, the upward input load to the retractor 6 is reliably transmitted to the vehicle body side via the bracket 7.

  Further, since the plurality of locking portions 21e corresponding to the support position of the retractor 6 and the mounting position of the bracket 7 are offset in the front-rear direction, when an upward input load acts on the retractor 6, the input to the bracket 7 A rotational moment is generated with the load, and a load in the shearing direction on the inner joint 21d, a load in the compression direction on the front joint 21g, a load in the compression direction on the outer joint 22d, and a load in the peeling direction on the rear joint 22e. Although acting individually, loads in the shearing, compression and peeling directions are efficiently supported by a single reinforcing member 19.

Next, the operation and effect of the seat belt retractor mounting structure of the vehicle V will be described.
According to the seat belt retractor mounting structure of the vehicle V, since the bracket 7 is disposed so as to protrude forward from the upper end side position of the opening side wall portion 5a to the front of the vehicle body, the retractor 6 is provided on the lower side of the luggage compartment effective for loading the load. Cargo space can be secured without occupying the area.
The bracket 7 is viewed from the front by a pair of vertical wall portions 21a, 22a formed opposite to each other in the vehicle width direction, and bottom wall portions 21b, 22b connecting the lower ends of the pair of vertical wall portions 21a, 22a. , The rigidity of the bracket 7 can be increased by setting the shape. Further, the rigidity of the bracket 7 is increased, and the inner vertical wall portion 21a is joined to the opening side wall portion 5a and the outer vertical wall portion 22a is joined to the inclined wall portion 5b, so that a rotational moment acts on the front end portion of the bracket 7. Even in such a cantilever state, the input load to the retractor 6 can be distributed and transmitted to the upper end side position of the highly rigid opening 5 via the highly rigid bracket 7.

  Since the reinforcing flange portion 21c that extends upward in a bent state from the middle step portion of the inner vertical wall portion 21a is provided, and the reinforcing flange portion 21c is joined to the inclined wall portion 5b, an upward input load to the retractor 6 is applied. It can be efficiently supported as a compressive load, and the rotational movement around the mounting position of the bracket 7 can be reliably suppressed.

  A part of the peripheral edge of the opening 5 is constituted by a rear pillar 14 including an opening side wall 5a and an inclined wall 5b, and reinforcement for reinforcing the vicinity of the boundary between the opening side wall 5a and the inclined wall 5b in the rear pillar 14 Since the member 19 is provided and the reinforcing flange portion 21c is joined to the reinforcing member 19 via the inclined wall portion 5b, the support rigidity of the bracket 7 can be increased, and the upward input load to the retractor 6 can be increased. It can be reliably supported at the periphery.

  Since the bracket 7 includes the connecting wall portion 22c that connects the inner vertical wall portion 21a and the outer vertical wall portion 22a substantially orthogonally, the rigidity of the bracket 7 can be increased, and the surfaces of the vertical wall portions 21a and 22a can be increased. Generation of abnormal noise caused by vibration can be prevented.

Next, a modified example in which the embodiment is partially changed will be described.
1] In the above-described embodiment, the example in which the bracket is constituted by the inner member and the outer member has been described. However, a single steel plate may be formed by pressing. In this case, the formability by a single steel plate can be ensured by omitting the connecting wall portion.
Further, from the viewpoint of the yield of the material, it is possible to configure the connecting wall portion as a separate member and to configure it with three members.

2) In the above embodiment, the example in which the bracket is attached to the middle part of the rear pillar has been described. However, the extension line connecting at least the seat belt anchor and the bracket mounting position is lower than the extension line connecting the seat belt anchor and the retractor. It suffices if it is set at a high position in the direction, and the bracket mounting position may be set near the upper end of the opening.

3] In the above-described embodiment, the example in which the reinforcing member joined to the inner joint portion, the front joint portion, and the rear joint portion has been described, but the support rigidity of the bracket can be secured by the rigidity of only the opening portion. It is also possible to omit the reinforcing member.
Further, the reinforcing member may be configured to extend in the vehicle width direction so as to correspond to the bracket mounting position so that the reinforcing member can be joined to the inner joint portion, the front joint portion, the outer joint portion, and the rear joint portion.

4) In the above-described embodiment, in a vehicle having an opening formed so as to extend vertically upward from the rear end portion of the rear floor and to move upward toward the front side between the middle step portion and the rear header in a side view. Although the applied example has been described, the same effect can be achieved even when applied to an opening formed so as to move upward toward the front side between the rear end of the rear floor and the rear header.

5] In addition, those skilled in the art can implement the present invention with various modifications added without departing from the spirit of the present invention, and the present invention includes such modifications. is there.

V Vehicle 4 Lift gate 5 Opening portion 5a Opening side wall portion 5b Inclined wall portion 6 Retractor 6a Belt 7 Bracket 14 Rear pillar 21 Inner member 21a Inner vertical wall portion 21b Inner bottom wall portion 21c Reinforcement flange portion 22 Outer member 22a Outer vertical wall portion 22b Outer bottom wall 22c connecting wall C1 closed section

Claims (4)

In a vehicle seat belt retractor mounting structure comprising an opening that is formed so as to move upward as viewed from the side and that can be opened and closed by a lift gate, and a seat belt retractor disposed near the opening.
The opening includes at least an opening side wall extending in a vehicle longitudinal direction substantially orthogonal to the vehicle width direction, and an inclined wall extending in an inclined manner from a front end of the opening side wall;
A pair of vertical wall portions formed opposite to each other in the vehicle width direction and a bottom wall portion connecting the lower ends of the pair of vertical wall portions are formed in a substantially U-shape opened upward in a front view. Having a retractor mounting bracket
The retractor mounting bracket is disposed so as to protrude from the upper end side position of the opening side wall portion toward the front of the vehicle body, and the inner vertical wall portion on the inner side in the vehicle width direction of the pair of vertical wall portions is the opening side wall. A vehicle seat belt retractor mounting structure, wherein an outer vertical wall portion on the outer side in the vehicle width direction of the pair of vertical wall portions is joined to the inclined wall portion.   2. The vehicle seat according to claim 1, further comprising a reinforcing flange portion extending upward in a bent state from a middle portion of the inner vertical wall portion, wherein the reinforcing flange portion is joined to the inclined wall portion. Belt retractor mounting structure. A part of the peripheral edge portion of the opening portion is constituted by a closed cross-section member including the opening side wall portion and the inclined wall portion,
A reinforcing member that reinforces the vicinity of the boundary between the opening side wall portion and the inclined wall portion in the closed cross-section member is provided.
The vehicle seat belt retractor mounting structure according to claim 2, wherein the reinforcing flange portion is joined to the reinforcing member via the inclined wall portion.   The vehicle according to any one of claims 1 to 3, wherein the retractor mounting bracket includes a connection wall portion that connects the inner vertical wall portion and the outer vertical wall portion in a substantially orthogonal shape. Seat belt retractor mounting structure.