JP2017056771A - Vehicle body rear part structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle body rear part structure that can achieve both improvement in interior comfort made by widening a width of a seating face part 11 and restriction of turning of a belt anchor 23 due to application of a tensile load to a front and upper side of a vehicle.SOLUTION: In a vehicle body rear part structure in which a belt anchor 23 of a seat belt mechanism 20 is fixed to a floor side panel 62 forming a floor in a vehicle interior S1, the belt anchor 23 comprises: a fixed part 231 that is fixed to a floor side panel 62 overlapping in a vehicle vertical direction with the vicinity of a side part of a seating face part 11 in a back seat 10; a belt connection part 232 extended toward outside in the vehicle width direction from the fixed part 231 and connected with one end of a belt main body 22; and an extension part 233 extended toward inside in the vehicle width direction from the fixed part 231. The floor side panel 62 is provided with a rear protrusion part 622 protruding toward above the vehicle, at a further rearward side of the vehicle than the belt anchor 23.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a rear body structure of a vehicle in which, for example, a belt anchor of a seat belt for protecting an occupant is fixed to a floor member that forms a floor surface in a passenger compartment in a rear seat of a vehicle such as an automobile.

A seat belt that is attached to the occupant's body is provided at the rear seat of a vehicle such as an automobile as a safety device that ensures the safety of the occupant.
As such a seat belt, a retractor (winding device) fixed to a vehicle body side member, and a substantially belt-like belt body having both ends connected to a belt anchor are connected to the vehicle body side member via a tongue provided on the belt body. A three-point seat belt or the like that engages with a buckle fixed to the vehicle is known.

  For example, in Patent Document 1, a belt anchor (anchor plate 2) is fixed to a vehicle body side member (vehicle body side plate 3) constituting a side surface of a vehicle interior by using a fastening metal fitting 6 made of a bolt and a nut. A belt body (seat belt 2) is disclosed.

  The belt anchor of Patent Document 1 has an opening through which the fastening bracket 6 is inserted at one end and a belt main body connected to the other end. Therefore, when the belt anchor is fixed to the vehicle body side member, the belt anchor is fastened in the tightening direction of the fastening bracket 6. There is a risk that the anchor will move around.

  Therefore, in Patent Document 1, the detent member (trim cover bracket 10) that contacts the belt main body portion of the belt anchor is arranged on the vehicle body side member on the vehicle rear side of the belt anchor on the right side of the vehicle, and the belt anchor on the left side of the vehicle. It is fixed to the vehicle body side member on the vehicle front side. Thereby, in patent document 1, the belt anchor is prevented from being twisted when tightening with the fastening bracket 6.

  By the way, the seat belt as described above, for example, when the vehicle collides with a collision object, the retractor winds up the belt main body and increases the tension of the belt main body to restrain the occupant's body, so that the occupant is out of the seat. To prevent them from being thrown out.

  At this time, the weight and inertial force of the occupant are applied to the belt anchor as a tensile load upward in the front of the vehicle via the belt body. For this reason, for example, on the vehicle right side of Patent Document 1, due to a tensile load upward in the front of the vehicle, the belt anchor rotates about the fastening bracket 6 around the rotation center, and the tension of the belt main body decreases momentarily. There was a fear.

  Therefore, for example, in the case of the right side of the vehicle in Patent Document 1, when a rotation-preventing member is also arranged on the vehicle front side of the belt anchor, the rotation of the belt anchor due to the tensile load in the upper front direction of the vehicle via the belt body is restricted. Can do.

  However, not only does the structure for restricting the rotation of the belt anchor increase due to the plurality of anti-rotation members and the belt anchor, but the shape of the trim cover covering the belt anchor and the anti-rotation member tends to increase. For this reason, in patent document 1, in the vehicle interior where the length in the vehicle width direction was limited, there was a problem that the length of the seat in the vehicle width direction was limited and the comfortability was reduced.

No. 7-28043

  In view of the above-mentioned problems, the present invention provides a vehicle body structure for a rear part of a vehicle that can achieve both improvement in comfort due to widening of the seat and restriction of rotation of the belt anchor due to a tensile load upward in the front of the vehicle. With the goal.

  The present invention includes a floor member that forms a floor surface in a vehicle interior at the rear of the vehicle, a seat that is placed and fixed on the floor member, and a seat belt having a substantially belt-like belt body, and is provided at one end of the belt body. A vehicle rear body structure in which a connected belt anchor is fixed to the floor member using a predetermined fastening member, and the belt anchor is overlapped with the vicinity of a side portion of a seating surface portion of the seat in the vehicle vertical direction. A fixed portion fixed to the floor member by the predetermined fastening member, a belt connecting portion extending from the fixed portion outward in the vehicle width direction and connected to one end of the belt main body, and the fixed portion An extension portion that extends inward in the vehicle width direction, and is close to the extension portion on the floor member on the vehicle rear side of the belt anchor and along the rear end of the extension portion. Characterized by comprising a rear protrusion which projects toward.

The predetermined fastening member may be a bolt screwed to a weld nut welded to the floor member, a nut screwed to a stud bolt provided on the floor member, or a bolt and a nut.
In the vehicle width direction, the extending portion has a shape in which the distance between the tip and the predetermined fastening member is substantially the same as the distance from the portion where the belt main body is connected to the predetermined fastening member in the belt connecting portion, more preferably In addition, the shape can be longer than the distance from the portion where the belt body is connected to the predetermined fastening member.
The rear protrusion may have a substantially triangular shape in plan view, a substantially trapezoidal shape in plan view, or a substantially rectangular shape in plan view.

According to the present invention, it is possible to achieve both the improvement of the comfortability due to the widening of the seat and the restriction of the rotation of the belt anchor by the tensile load on the upper front side of the vehicle.
Specifically, since the belt connecting portion is formed to extend from the fixed portion to the outside in the vehicle width direction, the vehicle body structure of the rear portion of the vehicle is not limited to the seat surface portion even when overlapped with the seat surface portion of the seat in the vehicle vertical direction. The belt body can be easily derived from the side portion of the belt.

  Furthermore, since the belt body can be led out from the side portion of the seating surface portion, for example, compared to the case where the belt body is led out through a slit provided in the seating surface portion, the rear body structure of the vehicle can eliminate the slit, The appearance of the face is not impaired.

  In addition, for example, in a plan view, by extending the belt connecting portion so as to follow the shape of the side portion of the seat surface portion, the rear body structure of the vehicle allows the belt main body to slide with the side portion of the seat surface portion. Can be further suppressed.

For this reason, the rear body structure of the vehicle can prevent the seat surface portion from being damaged by sliding between the seat surface portion and the belt body even when the seat is widened.
As a result, the rear body structure of the vehicle can easily widen the seating surface portion without impairing the appearance.

  Since the belt connecting portion extends from the fixed portion to the outside in the vehicle width direction, for example, when the vehicle collides with a collision object, a tensile load on the front upper side of the vehicle via the belt body acts on the belt connecting portion. Then, the belt anchor tends to rotate around a predetermined fastening member.

Therefore, the rear body structure of the vehicle rotates a predetermined fastening member by including an extending portion that extends inward in the vehicle width direction from the fixed portion and a rear protrusion that is located behind the belt anchor. The rotation of the belt anchor at the center, more specifically, the rotation of the extending portion toward the rear side of the vehicle can be restricted by the rear protrusion.
Furthermore, the rear vehicle body structure of the vehicle can prevent the extended portion from climbing on the rear protrusion when a tensile load upward in the front of the vehicle acts on the belt connecting portion.

  More specifically, for example, a configuration having a belt connecting portion at one end in the vehicle width direction, a fixing portion at the other end, and a contact between the belt connecting portion and the fixing portion on a rotation preventing portion provided on the vehicle body side In this case, when a tensile load upward in the front of the vehicle acts on the belt connecting portion, there is a possibility that the space between the belt connecting portion and the fixing portion is deformed upward in the vehicle starting from the fixing portion. For this reason, there is a possibility that the space between the belt connecting portion and the fixed portion of the belt anchor rides on the rotation preventing portion on the vehicle body side and the belt anchor rotates to the front of the vehicle.

  On the other hand, since the belt connecting portion, the fixing portion, and the extending portion are integrally formed from the outside in the vehicle width direction, the rear portion of the vehicle when the tensile load upward on the front of the vehicle acts on the belt connecting portion. The vehicle body structure can transmit a tensile load in the upper front direction of the vehicle to the floor member via a predetermined fastening member. For this reason, the rear vehicle body structure of the vehicle can suppress deformation of the extended portion due to a tensile load upward in the front of the vehicle, and can prevent the extended portion from riding on the rear protrusion.

  Thus, for example, when a vehicle collides with a colliding object, the rear body structure of the vehicle extends to the rear side of the vehicle even if a tensile load on the front front side of the vehicle via the belt body acts on the belt connecting portion. The rotation of the part can be reliably regulated. For this reason, the rear body structure of the vehicle can reliably prevent the restraint of the occupant by the belt body from weakening for a moment when the vehicle collides with a collision object.

In addition, since the floor member protrudes upward from the vehicle to form the rear protrusion, the rear body structure of the vehicle has a lighter structure than the case where the belt anchor is configured separately. The rotation of the belt anchor can be restricted.
Therefore, the rear body structure of the vehicle can achieve both the improvement of the comfortability by widening the seat and the restriction of the rotation of the belt anchor by the tensile load upward in the front of the vehicle.

  As an aspect of the present invention, the extending portion of the belt anchor is formed in a substantially triangular shape in a plan view or a substantially trapezoidal shape in a plan view when the length in the vehicle front-rear direction is shorter in the vehicle width direction inside than in the vehicle width direction, The rear protrusion of the floor member may be formed in a substantially triangular shape in plan view or a substantially trapezoidal shape in plan view with the length in the vehicle front-rear direction being longer in the vehicle width direction inside than in the vehicle width direction outside.

According to the present invention, the rear vehicle body structure of the vehicle can reduce the size of the belt anchor and the rear protrusion, and can more reliably regulate the rotation of the belt anchor.
Specifically, the rear body of the vehicle is formed by forming the extending portion in a substantially triangular shape in a plan view or a substantially trapezoidal shape in a plan view in which the length in the vehicle longitudinal direction is shorter in the vehicle width direction inside than in the vehicle width direction outside. The structure can achieve a reduction in the size and weight of the belt anchor as compared with the extending portion having a substantially rectangular shape in plan view.

  Furthermore, for example, when the extending portion of the belt anchor is substantially rectangular in plan view and the rear protrusion is substantially rectangular in plan view, the length occupied by the belt anchor and the rear protrusion tends to be long in the vehicle front-rear direction.

  On the other hand, when the extension portion of the belt anchor is substantially triangular in plan view and the rear protrusion portion is substantially triangular in plan view, the top portion of the extension portion and the top portion of the rear protrusion portion are staggered in the vehicle width direction. Thus, since the belt anchor and the rear protrusion are arranged, the rear body structure of the vehicle can shorten the length occupied by the belt anchor and the rear protrusion in the vehicle front-rear direction.

In addition, since it is easy to ensure a long length in the vehicle front-rear direction at the end portion on the inner side in the vehicle width direction, the rear protrusion is, for example, in the vehicle width direction compared to a substantially linear rear protrusion that is long in the vehicle width direction. The rigidity in the vehicle front-rear direction at the inner end can be easily improved.
As a result, the rear body structure of the vehicle prevents the rear projection from being deformed by the pressing by the extending portion, particularly by the pressing by the tip of the extending portion, when a tensile load upward in the front of the vehicle acts on the belt connecting portion. it can.

  Therefore, the rear vehicle body structure of the vehicle includes a belt anchor and a rear portion by an extending portion having a substantially triangular shape in plan view or a substantially trapezoidal shape in plan view, and a rear protrusion having a substantially triangular shape in plan view or a substantially trapezoidal shape in plan view. While miniaturizing a projection part, rotation of a belt anchor can be controlled more reliably.

Further, as an aspect of the present invention, in a state where the belt anchor is fixed to the floor member, the vehicle is closer to the extension portion on the vehicle front side than the belt anchor, and along the front end of the belt anchor. It is possible to provide a front projecting portion projecting from the front.
The front protrusion may be a substantially linear bead that extends in the vehicle width direction along the front end of the belt anchor.

According to the present invention, the rear vehicle body structure of the vehicle can achieve both the prevention of the belt anchor from rotating when fastened to the floor member and the regulation of the rotation of the belt anchor by the tensile load through the belt body. .
Specifically, by projecting toward the front side of the vehicle relative to the belt anchor, the front protrusion can regulate the rotation of the belt anchor in the clockwise direction in plan view with a predetermined fastening member as the center of rotation. it can.

  For this reason, when the predetermined fastening member is tightened, the rear vehicle body structure of the vehicle can prevent the belt anchor from being swung around the predetermined fastening member by the front protrusion. At this time, the load applied to the belt anchor is significantly smaller than the load applied to the belt anchor when the vehicle collides with the collision object.

  Therefore, the rear vehicle body structure of the vehicle can form the front protrusion in a shape that suppresses the length in the vehicle front-rear direction. Thereby, the rear vehicle body structure of the vehicle can suppress the length occupied by the belt anchor, the rear protrusion, and the front protrusion in the vehicle front-rear direction.

  In addition, since the rear protrusion and the front protrusion are close to the fixed belt anchor, the rear protrusion and the front protrusion can function as a positioning means for the belt body with respect to the floor member.

  Therefore, the rear body structure of the vehicle achieves both the prevention of the belt anchor from rotating when fastened to the floor member by the front protrusion and the restriction of the rotation of the belt anchor by the tensile load via the belt body. be able to.

  According to the present invention, it is possible to provide a rear body structure of a vehicle that can achieve both improvement in comfort by widening the seat and restriction of rotation of the belt anchor by a tensile load upward in the front of the vehicle.

The external appearance perspective view which shows the external appearance from the compartment side in a vehicle rear part. The external appearance perspective view which shows the external appearance of the state which removed the rear seat. The top view which shows the planar view of a vehicle rear part. The principal part external appearance perspective view which shows the external appearance of a belt anchor vicinity. The principal part top view which shows the planar view of the belt anchor vicinity. AA arrow sectional drawing in FIG. BB arrow sectional drawing in FIG. CC sectional view taken on the line in FIG.

An embodiment of the present invention will be described with reference to the drawings.
1 shows an external perspective view of the vehicle rear portion 1 from the vehicle compartment S1 side, FIG. 2 shows an external perspective view of the vehicle with the rear seat 10 removed, and FIG. 3 shows a plan view of the vehicle rear portion 1. 4 shows an external perspective view of the main part in the vicinity of the belt anchor 23, FIG. 5 shows a plan view of the main part in the vicinity of the belt anchor 23, FIG. 6 shows a cross-sectional view taken along line AA in FIG. Shows a cross-sectional view taken along the line B-B in FIG. 5, and FIG. 8 shows a cross-sectional view taken along the line C-C in FIG. 5.

  In addition, since the vehicle rear portion 1 in the present embodiment has a bilaterally symmetric structure, illustration of the left side of the vehicle is omitted. Further, in FIG. 3, the bearing surface portion 11 of the rear seat 10 is indicated by a two-dot chain line in order to clarify the main part.

  In the drawing, arrows Fr and Rr indicate the vehicle front-rear direction, arrow Fr indicates the vehicle front, and arrow Rr indicates the vehicle rear. Furthermore, arrows Rh and Lh indicate the vehicle width direction, arrow Rh indicates the vehicle right direction, and arrow Lh indicates the vehicle left direction. In addition, the upper side in the figure is the upper side of the vehicle, and the lower side in the figure is the lower side of the vehicle.

  First, the vehicle rear part 1 in this embodiment is demonstrated in detail using FIG.1 and FIG.2. In addition, since the vehicle rear portion 1 on the right side of the vehicle and the vehicle rear portion 1 on the left side of the vehicle are left and right target structures, the vehicle rear portion 1 on the right side of the vehicle will be described in this embodiment.

  As shown in FIGS. 1 and 2, the vehicle body structure of the vehicle rear portion 1 includes a pair of left and right rear wheel houses 2 in which rear wheels (not shown) are accommodated, and a pair of left and right roof rails 3 extending in the vehicle front-rear direction at the top of the vehicle. A pair of left and right vehicle body rear sides 4 forming the side surface of the vehicle rear portion 1 between the rear wheel house 2 and the roof rail 3, and a pair of left and right side sills extending from the vehicle front lower portion of the rear wheel house 2 to the vehicle front side. 5, a side frame 6 extending in the vehicle longitudinal direction on the inner side in the vehicle width direction than the side sill 5, a floor panel 7 disposed between the pair of left and right side sills 5, and the pair of left and right roof rails 3 are connected in the vehicle width direction. And a roof panel (not shown).

  A vehicle surrounded by the above-described pair of left and right rear wheel houses 2, a pair of left and right roof rails 3, a pair of left and right side sills 5, a pair of left and right vehicle body rear sides 4, a floor panel 7, and a roof panel. The space of the rear portion 1 is configured as a passenger compartment S1 in which an occupant gets.

  As shown in FIGS. 1 and 2, the roof rail 3 is integrally formed by joining a roof rail outer 3a that is an exterior design surface of a vehicle and a roof rail inner 3b that is disposed on the inner side in the vehicle width direction than the roof rail outer 3a. It is configured.

As shown in FIGS. 1 and 2, the vehicle body rear side portion 4 is a vehicle body side portion at the vehicle rear side of the vehicle rear portion 1 from the entrance S2 where passengers get on and off, and includes a C pillar portion 4a and a D pillar portion 4b. And an outer panel 4c that is an exterior design surface of the vehicle.
The outer panel 4c is formed by extending the front lower portion forward of the vehicle so as to integrally cover the side sill 5 from the outside in the vehicle width direction.

  As shown in FIGS. 1 and 2, the side sill 5 is formed in a closed cross-sectional shape having a substantially rectangular cross section in the vehicle width direction. Specifically, the side sill 5 is formed by joining a side sill outer 5a disposed on the outer side in the vehicle width direction and a side sill inner 5b disposed on the inner side in the vehicle width direction with respect to the side sill outer in the vehicle width direction. It is structured.

The side sill outer 5a is formed so that the cross-sectional shape in the vehicle width direction is a substantially hat-shaped cross-section projecting outward in the vehicle width direction.
The side sill inner 5b is formed in a substantially hat-shaped cross section in which the cross-sectional shape in the vehicle width direction protrudes inward in the vehicle width direction.

  As shown in FIGS. 1 and 2, the side frame 6 extends from the floor side frame 6 a to the vehicle rear side along the rear wheel house 2 and the floor side frame 6 a extending in the vehicle front-rear direction along the side sill 5. The rear side frame 6b.

Further, the pair of left and right side frames 6 are connected by a cross member 8 extending in the vehicle width direction in the vicinity of the center of the rear wheel house 2 in the vehicle front-rear direction.
In the present embodiment, the floor side frame 6a and the rear side frame 6b will be described as the side frames 6.

  More specifically, the side frame 6 is formed by joining a frame main body 61 having a substantially U-shaped cross section that is open on the vehicle upper side and a floor side panel 62 that closes the opening of the frame main body 61 to the side sill 5 and the rear wheel house 2. Thus, the cross section along the vehicle width direction is integrally configured to have a closed cross section.

  Although not shown in detail, the frame main body 61 extends from the side of the side sill 5 on the inner side in the vehicle width direction and the side of the rear wheel house 2 to the outer side in the vehicle width direction from the lower end of the joint portion. The lower surface portion, the inner side surface portion erected upward from the tip of the lower surface portion, and the flange portion extending outward from the upper end of the inner side surface portion in the vehicle width direction are integrally formed.

  The floor side panel 62 extends substantially from the front of the vehicle to the front portion 62a of the flat plate, and extends from the rear end of the front portion 62a toward the rear of the vehicle at the front of the rear wheel house 2 and the rear wheel. An inclined portion 62b joined to the front end of the house 2, a substantially flat rear portion 62c extending from the inclined portion 62b toward the rear of the vehicle, and a vehicle lower side from the inner ends in the vehicle width direction of the inclined portion 62b and the rear portion 62c. It is integrally formed with an inner wall portion 62d extending to the bottom.

  Further, the floor side panel 62 is formed in a shape having a length in the vehicle width direction that can be joined to the upper surface of the side sill inner 5 b and the inside in the vehicle width direction can be joined to the floor panel 7. That is, the floor side panel 62 and the floor panel 7 constitute a floor surface in the passenger compartment S1.

  As shown in FIG. 1 to FIG. 3, the vehicle rear portion 1 having such a configuration is mounted and fixed on the floor panel 7 in front of the cross member 8, and a rear seat 10 on which an occupant sits, And a seat belt mechanism 20 to be mounted on a seated passenger.

As shown in FIGS. 1 and 3, the rear seat 10 is composed of a seat surface portion 11 that is long in the vehicle width direction, and a pair of left and right backrest portions 12 that are supported forward and backward with respect to the seat surface portion 11. It is composed.
As shown in FIG. 3, the seat surface portion 11 is formed in a shape having a length in the vehicle width direction in which an end portion is positioned near the entrance S2. Specifically, the seat surface portion 11 is formed in a shape having a length in the vehicle width direction substantially equal to the distance between the pair of left and right side sills 5 in plan view.

The backrest portion 12 is composed of a backrest main body 13 that comes into contact with the back and a headrest 14 that comes into contact with the head when an occupant is seated. Furthermore, a belt guide portion 15 is attached to the backrest portion 12 outside the headrest 14 in the vehicle width direction and on the upper end of the backrest body.
The belt guide portion 15 has a function of guiding the drawing and winding of the belt main body 22 while the belt main body 22 of the seat belt mechanism 20 described later is inserted therethrough.

  As shown in FIGS. 2 and 3, the seat belt mechanism 20 includes a retractor 21 fixed to the upper portion of the vehicle body rear side portion 4 behind the cross member 8 and a substantially belt-like shape extending from the retractor 21 to the front of the vehicle. The belt body 22 and the belt anchor 23 connected to the tip of the belt body 22 and fastened to the floor side panel 62 are configured.

  The retractor 21 is fixed to the vehicle body rear side portion 4 via a bracket 24. The retractor 21 is connected to one end of the belt main body 22, functions to pull out the belt main body 22, functions to wind up the belt main body 22, and winds up the belt main body 22 to restrain the occupant when a collision is detected. And a pretensioner function.

  The belt body 22 is formed in a substantially band shape by weaving a synthetic fiber having excellent tensile strength. A tongue 25 that engages a buckle (not shown) fixed to the rear seat 10 is attached to the belt body 22.

  The belt anchor 23 is formed by bending a metal plate material having a predetermined thickness and having a substantially triangular shape in plan view. The belt anchor 23 is fastened and fixed to the floor side panel 62 so that the top portion is located on the inner side in the vehicle width direction.

  More specifically, as shown in FIGS. 4 and 5, the belt anchor 23 is fixed to the floor side panel 62 and fixed to the floor side panel 62. The belt connecting portion 232 is connected to the other end of the belt main body 22 and the extending portion 233 is extended from the fixing portion 231 outward in the vehicle width direction.

The fixing portion 231 is formed with a bolt insertion hole 231a (see FIG. 6) through which a bolt 26 screwed into a weld nut 63 (see FIG. 6) welded to the lower surface of the floor side panel 62 is inserted.
The extending portion 233 is formed in a shape tapered toward the inner side in the vehicle width direction in a state of being fastened and fixed to the floor side panel 62.

  As shown in FIG. 5, the fixed portion 231 and the extending portion 233 described above are an edge portion on the vehicle front side extending from the top portion toward the vehicle width direction outer side with the vehicle width direction inner side of the extending portion 233 as a top portion. The vehicle is integrally formed in a substantially triangular shape in plan view having a vehicle rear side edge extending from the top to the vehicle width direction outside and the vehicle rear.

  The belt connecting portion 232 extends from the fixing portion 231 to the outside in the vehicle width direction and above the vehicle so as to follow the shape of the end portion of the seat surface portion 11 in a plan view when fastened and fixed to the floor side panel 62. . Further, the belt connecting portion 232 is formed with an opening 232a through which the belt main body 22 is inserted.

  The belt main body 22 is connected to the belt anchor 23 by inserting the belt main body 22 into the opening hole 232a of the belt connecting portion 232 and sewing the belt main body 22 in an annular shape.

  The belt anchor 23 has a front end of the extending portion 233 from the center of the bolt insertion hole 231a with respect to the distance from the contact portion between the belt connecting portion 232 and the belt main body 22 to the center of the bolt insertion hole 231a in plan view. The extending part 233 and the belt connecting part 232 are formed so that the distance to the vicinity is substantially the same.

  As shown in FIGS. 2 and 3, the belt anchor 23 having such a configuration is opposed to the inclined portion 62 b of the floor side panel 62 that faces the vehicle width direction end portion of the seat surface portion 11 at the vehicle lower side in plan view. And fastened.

  Specifically, the belt anchor 23 is a bolt inserted into the bolt insertion hole 231a of the fixing portion 231 in a state where the belt connecting portion 232 is positioned on the outer side in the vehicle width direction and the extending portion 233 is positioned on the inner side in the vehicle width direction. 26 is screwed into a weld nut 63 welded to the lower surface of the floor side panel 62, thereby fixing it to the inclined portion 62b.

  On the other hand, as shown in FIGS. 4 and 5, the inclined portion 62 b to which the belt anchor 23 is fixed includes a front protrusion 621 that protrudes toward the upper side of the vehicle in front of the belt anchor 23, and a belt anchor. A rear protrusion 622 is formed on the rear side of the vehicle 23 and projecting upward from the vehicle.

  As shown in FIGS. 5, 7, and 8, the front protrusion 621 is close to the belt anchor 23 fastened and fixed to the inclined portion 62 b on the front side of the vehicle and is larger than the thickness of the belt anchor 23. Projecting with a high protruding height.

  More specifically, the front protrusion 621 has a length in the vehicle width direction that is substantially the same as the length of the fixed portion 231 and the extending portion 233 in the vehicle width direction, and protrudes in a substantially elliptical shape in plan view that is long in the vehicle width direction. Has been established. Furthermore, the vehicle rear side edge portion of the front protrusion 621 protrudes along the vehicle front side edge portion of the fixed portion 231 and the extending portion 233.

  As shown in FIGS. 5, 7, and 8, the rear protrusion 622 is close to the belt anchor 23 fastened and fixed to the inclined portion 62 b on the vehicle rear side, and is larger than the thickness of the belt anchor 23. Projecting with a high protruding height. Further, the rear protrusion 622 is formed in a substantially triangular shape in plan view having apexes at positions that alternate with the apex of the extending portion 233 in the belt anchor 23 in the vehicle width direction.

  More specifically, the rear protrusion 622 has a top on the outer side in the vehicle width direction, and an edge on the vehicle front side extending from the top to the inner side in the vehicle width is provided on the vehicle rear side in the fixed portion 231 and the extending portion 233. It protrudes along the edge.

  That is, the rear protrusion 622 has a top portion on the outer side in the vehicle width direction, and has a substantially triangular shape in plan view having a length in the vehicle width direction substantially equal to the length of the fixing portion 231 and the extending portion 233 in the vehicle width direction. It protrudes to.

  As shown in FIGS. 5 and 8, the end on the inner side in the vehicle width direction of the rear protrusion 622 is slightly located on the inner side in the vehicle width with respect to the inner end in the vehicle width direction of the front protrusion 621. Protrusively to project.

  Further, as shown in FIGS. 5 and 6, the front protrusion 621 and the rear protrusion 622 are integrally formed on the vehicle lower side of the front protrusion 621 and the rear protrusion 622 described above, that is, on the lower surface of the inclined portion 62b. A reinforcement 64 is provided.

  The reinforcement 64 has a substantially L-shaped cross section that can be joined to the inclined portion 62b and the inner wall portion 62d in the vehicle width direction, and the position of the cross member 8 from the position in front of the vehicle with respect to the front protrusion 621. It forms in the shape which has the length of the vehicle front-back direction.

As shown in FIGS. 7 and 8, the portion of the reinforcement 64 that faces the front protrusion 621 is formed in a substantially flat plate shape in a cross section along the vehicle longitudinal direction.
On the other hand, as shown in FIGS. 7 and 8, the portion of the reinforcement 64 that faces the rear protrusion 622 has a shape having a recess 64 a that is recessed downward in the vehicle in a cross section along the vehicle front-rear direction. Forming. And in the cross section along the vehicle front-back direction, the recessed part 64a forms the cross-sectional closed cross-sectional shape with the back protrusion part 622. FIG.

  Note that the recess 64a of the reinforcement 64 has a protrusion depth in the vehicle front-rear direction passing through the extending portion 233 of the belt anchor 23 such that the protrusion depth in the vehicle downward direction is greater than the protrusion depth in the vehicle front-rear direction cross section passing through the bolt 26. It is also recessed so that it becomes deeper.

  As shown in FIGS. 4 and 5, such a reinforcement 64 is welded and fixed to the inner wall portion 62 d at five welding locations W <b> 1 positioned at predetermined intervals in the vehicle front-rear direction. Further, the reinforcement 64 is welded and fixed to the inclined portion 62b on the vehicle rear side with respect to the rear projection 622 at two welding locations W2 positioned at a predetermined interval in the vehicle front-rear direction.

  In addition, the reinforcement 64 includes one welding location W3 located on the vehicle front side of the front protrusion 621 in the vehicle width direction substantially in the vehicle width direction, the vehicle width direction inner side of the front protrusion 621, and the rear protrusion. At one welding position W4 located on the vehicle front side with respect to the vehicle width direction inner end portion at 622, the welding is fixed to the inclined portion 62b on the vehicle front side with respect to the rear projection 622.

The rear vehicle body structure of the vehicle having the above-described configuration can achieve both improvement in comfort due to the widening of the seat surface portion 11 and restriction of the rotation of the belt anchor 23 due to a tensile load on the front upper side of the vehicle. .
Specifically, since the belt connecting portion 232 is formed to extend outward from the fixed portion 231 in the vehicle width direction, the rear vehicle body structure of the vehicle can be seated even when overlapped with the seat surface portion 11 in the vehicle vertical direction. The belt body 22 can be easily led out from the side portion of the surface portion 11.

  Further, since the belt body 22 can be led out from the side portion of the seat surface portion 11, the rear body structure of the vehicle does not require a slit as compared with the case where the belt body 22 is led out through a slit provided in the seat surface portion 11, for example. And the appearance of the seat surface portion 11 is not impaired.

  In addition, since the belt connecting portion 232 extends along the shape of the side portion of the seat surface portion 11 in a plan view, the rear body structure of the vehicle has the belt main body 22 that slides on the side portion of the seat surface portion 11. It can be suppressed more.

For this reason, the rear body structure of the vehicle can prevent the seat surface portion 11 from being damaged by sliding between the seat surface portion 11 and the belt body 22 even when the seat surface portion 11 is widened.
Thereby, the rear part vehicle body structure of the vehicle can facilitate the widening of the seat surface part 11 without impairing the appearance.

  Since the belt connecting portion 232 extends from the fixed portion 231 to the outer side in the vehicle width direction, for example, when the vehicle collides with an impact object, a tensile load in the upper front direction of the vehicle via the belt body 22 is connected to the belt. When acting on the portion 232, the belt anchor 23 tries to rotate around the bolt 26 as a rotation center.

In view of this, the rear body structure of the vehicle includes bolts 26 by including an extending portion 233 that extends inward in the vehicle width direction from the fixed portion 231 and a rear protrusion 622 that is positioned rearward of the vehicle relative to the belt anchor 23. The rotation of the belt anchor 23 around the rotation center, more specifically, the rotation of the extending portion 233 toward the vehicle rear side in plan view can be restricted by the rear protrusion 622.
Further, the rear vehicle body structure of the vehicle can prevent the extending portion 233 from riding on the rear protrusion 622 when a tensile load upward in the front of the vehicle acts on the belt connecting portion 232.

  More specifically, for example, a configuration having a belt connecting portion at one end in the vehicle width direction, a fixing portion at the other end, and a contact between the belt connecting portion and the fixing portion on a rotation preventing portion provided on the vehicle body side In this case, when a tensile load upward in the front of the vehicle acts on the belt connecting portion, there is a possibility that the space between the belt connecting portion and the fixing portion is deformed upward in the vehicle starting from the fixing portion. For this reason, there is a possibility that the space between the belt connecting portion and the fixed portion of the belt anchor rides on the rotation preventing portion on the vehicle body side and the belt anchor rotates to the front of the vehicle.

  On the other hand, since the belt connecting portion 232, the fixing portion 231 and the extending portion 233 are integrally formed from the outside in the vehicle width direction, the rear vehicle body structure of the vehicle has a tensile load in the upper front direction of the vehicle. It can be transmitted to the inclined portion 62b via the bolt 26. For this reason, the rear body structure of the vehicle can suppress deformation of the extended portion 233 due to a tensile load upward in the front of the vehicle, and can prevent the extended portion 233 from riding on the rear protrusion 622.

  Thereby, for example, when a vehicle collides with a colliding object, even if a tensile load in the upper front direction of the vehicle via the belt main body 22 acts on the belt connecting portion 232, the rear body structure of the vehicle can be The rotation of the extending portion 233 can be reliably restricted. For this reason, the rear body structure of the vehicle can reliably prevent the restraint of the occupant by the belt body 22 from weakening for a moment when the vehicle collides with the collision object.

  In addition, since the rear side protrusion 62 is formed by projecting the floor side panel 62 upward in the vehicle, the rear body structure of the vehicle is compared with the case where the rotation stopper of the belt anchor 23 is configured separately. The rotation of the belt anchor 23 can be restricted with a lightweight configuration.

  Therefore, the rear vehicle body structure of the vehicle can achieve both improvement in comfort due to the widening of the seating surface portion 11 and restriction of the rotation of the belt anchor 23 due to the tensile load on the upper front side of the vehicle.

  Further, the belt anchor 23 is formed in a substantially triangular shape in plan view having a top portion on the inner side in the vehicle width direction, and the rear protrusion 622 is formed in a substantially triangular shape in plan view having a top portion on the outer side in the vehicle width direction. The vehicle body structure can reduce the size of the belt anchor 23 and the rear protrusion 622 and can more reliably regulate the rotation of the belt anchor 23.

  Specifically, by forming the extending portion 233 in a substantially triangular shape in plan view having a top portion on the inner side in the vehicle width direction, the rear body structure of the vehicle has a belt anchor compared to the extending portion in a substantially rectangular shape in plan view. 23 can be reduced in size and weight.

  Furthermore, for example, when the extending portion of the belt anchor is substantially rectangular in plan view and the rear protrusion is substantially rectangular in plan view, the length occupied by the belt anchor and the rear protrusion tends to be long in the vehicle front-rear direction.

  On the other hand, since the belt anchor 23 and the rear projection 622 are arranged so that the top of the extending portion 233 and the top of the rear projection 622 are staggered in the vehicle width direction, the rear body of the vehicle The structure can shorten the length occupied by the belt anchor 23 and the rear protrusion 622 in the vehicle longitudinal direction.

  In addition, since it is easy to ensure a long length in the vehicle front-rear direction at the end in the vehicle width direction, the rear protrusion 622 is, for example, compared to a substantially linear rear protrusion that is long in the vehicle width direction. The rigidity in the vehicle front-rear direction at the end on the inner side in the direction can be easily improved.

  Accordingly, in the rear body structure of the vehicle, the rear protrusion 622 is deformed by the pressing by the belt anchor 23, particularly the pressing by the tip of the extending portion 233, when a tensile load upward in the front of the vehicle acts on the belt connecting portion 232. Can be prevented.

  Therefore, the rear vehicle body structure of the vehicle has a belt-shaped anchor 23 and a rear-projecting portion 622 which are reduced in size by the extended portion 233 having a substantially triangular shape in plan view and a rear projection portion 622 having a substantially triangular shape in plan view. The rotation of the anchor 23 can be more reliably regulated.

  Further, by providing the inclined portion 62b with the front protrusion 621 located on the vehicle front side with respect to the belt anchor 23, the rear vehicle body structure of the vehicle can prevent the belt anchor 23 from swung around when it is fastened to the inclined portion 62b. Further, it is possible to achieve both the regulation of the rotation of the belt anchor 23 by the tensile load via the belt main body 22.

  Specifically, by projecting toward the front side of the vehicle relative to the belt anchor 23, the front protrusion 621 regulates the rotation of the belt anchor 23 in the clockwise direction in plan view with the bolt 26 as the rotation center. Can do.

  For this reason, when the bolt 26 is tightened, the rear vehicle body structure of the vehicle can prevent the belt anchor 23 from being swung by the front protrusion 621 when the bolt 26 is tightened. At this time, the load applied to the belt anchor 23 is significantly smaller than the load applied to the belt anchor 23 when the vehicle collides with the collision object.

  Therefore, the rear vehicle body structure of the vehicle can form the front protrusion 621 in a shape that suppresses the length in the vehicle front-rear direction. Thereby, the rear vehicle body structure of the vehicle can suppress the length occupied by the belt anchor 23, the rear protrusion 622, and the front protrusion 621 in the vehicle front-rear direction.

  In addition, since the rear protrusion 622 and the front protrusion 621 are close to the fixed belt anchor 23, the rear protrusion 622 and the front protrusion 621 are positioned with respect to the floor side panel 62. It can function as a means.

  Accordingly, the rear vehicle body structure of the vehicle has the front protrusion 621 to prevent the belt anchor 23 from rotating when fastened to the inclined portion 62 b and to restrict the rotation of the belt anchor 23 due to the tensile load via the belt body 22. It can be achieved at the same time.

  In addition, since the reinforcement 64 is provided on the lower surface of the floor side panel 62, the rear body structure of the vehicle has the rigidity of the portion where the fixing portion 231 of the belt anchor 23 abuts in the inclined portion 62b, and the rear protrusion 622. Stiffness can be improved.

  As a result, when a tensile load upward in the front of the vehicle acts on the belt connecting portion 232, the rear vehicle body structure of the vehicle prevents the inclined portion 62b from being deformed by the tensile load via the bolt 26, and the extension portion 233 The rear protrusion 622 can be prevented from being deformed by the pressing.

  In addition, the reinforcement 64 is attached to the floor side panel 62 at a welding location W4 at a position on the inner side in the vehicle width direction with respect to the front protruding portion 621 and on the vehicle front side with respect to the end portion on the inner side in the vehicle width direction with respect to the rear protruding portion 622. By joining, the rear vehicle body structure of the vehicle can achieve both suppression of deformation in the front protrusion 621 and load transmission to the reinforcement 64.

  More specifically, when the extended portion 233 presses the rear protrusion 622 upward in the vehicle rear direction due to a tensile load applied to the belt connecting portion 232 upward in the front of the vehicle, the end of the rear protrusion 622 on the inner side in the vehicle width direction A tensile load toward the vehicle rear upper side acts on the inclined portion 62b in front of the vehicle rather than the portion.

  At this time, the rear vehicle body structure of the vehicle can transmit the tensile load to the rear upper side of the vehicle to the reinforcement 64 via the welding location W4. As a result, the rear vehicle body structure of the vehicle can prevent the transmission of the load by which the extending portion 233 presses the rear protrusion 622 to the vicinity of the inner end of the front protrusion 621 in the vehicle width direction. For this reason, the rear vehicle body structure of the vehicle can prevent the front protrusion 621 from being deformed by a tensile load applied to the belt connecting portion 232 upward in the front of the vehicle.

In correspondence between the configuration of the present invention and the above-described embodiment,
The floor member of the present invention corresponds to the inclined portion 62b of the floor side panel 62 of the embodiment,
Similarly,
The seat corresponds to the rear seat 10,
The seat belt corresponds to the seat belt mechanism 20,
The predetermined fastening member corresponds to the bolt 26,
The seat surface portion of the seat corresponds to the seat surface portion 11 of the rear seat 10,
The rear end of the extended portion corresponds to the edge of the extended portion 233 on the vehicle rear side,
The front end of the belt anchor corresponds to the vehicle front side edge of the fixed portion 231 and the extending portion 233,
The present invention is not limited only to the configuration of the above-described embodiment, and many embodiments can be obtained.

  For example, in the above-described embodiment, the fixing portion 231 of the belt anchor 23 is fastened and fixed to the inclined portion 62b using the bolt 26. However, the present invention is not limited to this, and a stud bolt is attached to the inclined portion 62b. While providing, it is good also as a structure which fastens and fixes the fixing | fixed part 231 of the belt anchor 23 using the nut screwed together with a stud bolt.

  Further, in plan view, the distance from the center of the bolt insertion hole 231a to the vicinity of the tip of the extending portion 233, and the distance from the contact point between the belt connecting portion 232 and the belt main body 22 to the center of the bolt insertion hole 231a, Although the belt anchor 23 has substantially the same interval, the present invention is not limited to this, and the bolt insertion hole 231a is not limited to the distance from the contact point between the belt connecting portion 232 and the belt main body 22 to the center of the bolt insertion hole 231a. The belt anchor 23 may have a long distance from the center to the vicinity of the tip of the extending portion 233.

  As a result, when a tensile load in the upper front direction of the vehicle is applied to the belt connecting portion 232, the load by which the extending portion 233 presses the rear protrusion 622 against the tensile load applied to the belt connecting portion 232 according to the principle of the lever. Can be reduced. For this reason, the rear vehicle body structure of the vehicle can more reliably prevent the rear protrusion 622 from being deformed, and can more stably regulate the rotation of the belt anchor 23.

Although the belt anchor 23 has a substantially triangular shape in plan view having a top on the inner side in the vehicle width direction, the belt anchor 23 may have a substantially trapezoidal shape in plan view with a short side on the inner side in the vehicle width direction.
Further, the rear protrusion 622 has a substantially triangular shape in plan view having a top on the outer side in the vehicle width direction. However, the present invention is not limited thereto, and the rear protrusion 622 may have a substantially trapezoidal shape in plan view with the outer side in the vehicle width in the short side. Good.

  Alternatively, the belt anchor 23 may have a substantially triangular shape in plan view having a top on the inner side in the vehicle width direction, and a rear protrusion 622 having a substantially trapezoidal shape in plan view having a short side on the outside in the vehicle width direction. Alternatively, a belt anchor 23 having a substantially trapezoidal shape in plan view with a short side in the vehicle width direction and a rear protrusion 622 having a substantially triangular shape in plan view having a top on the outside in the vehicle width direction may be used.

  In addition, although the reinforcement 64 having the recess 64a in the portion facing the rear protrusion 622 is used, the present invention is not limited thereto, and a closed cross-sectional shape is formed with the rear protrusion 622 in a cross section along the vehicle front-rear direction. If it is a shape, the part facing the rear protrusion 622 may be substantially flat.

DESCRIPTION OF SYMBOLS 1 ... Vehicle rear part 10 ... Rear seat 11 ... Seat surface part 20 ... Seat belt mechanism 22 ... Belt main body 23 ... Belt anchor 26 ... Bolt 62 ... Floor side panel 62b ... Inclined part 231 ... Fixing part 232 ... Belt connection part 233 ... Extension Part 621 ... Front protrusion 622 ... Rear protrusion S1 ... Car compartment

Claims (3)

A floor member forming a floor surface in a vehicle interior at the rear of the vehicle;
A seat placed and fixed on the floor member;
A seat belt having a substantially belt-like belt body,
A vehicle rear body structure in which a belt anchor connected to one end of the belt body is fixed to the floor member using a predetermined fastening member,
To the belt anchor,
A fixing portion fixed by the predetermined fastening member with respect to the floor member that overlaps in the vicinity of the side portion of the seat surface portion in the seat and in the vehicle vertical direction,
A belt connecting portion extending from the fixed portion to the outside in the vehicle width direction and connected to one end of the belt body;
An extending portion extending inward in the vehicle width direction from the fixed portion,
In the floor member,
A rear vehicle body structure including a rear protrusion that is proximate to the extended portion on the vehicle rear side of the belt anchor and protrudes upward along the rear end of the extended portion. The extending portion of the belt anchor is
The length in the vehicle front-rear direction is shorter in the vehicle width direction than in the vehicle width direction outside, and is formed in a substantially triangular shape in plan view or a substantially trapezoidal shape in plan view,
The rear protrusion of the floor member,
The rear body structure of the vehicle according to claim 1, wherein the vehicle body longitudinal direction has a substantially triangular shape in a plan view or a substantially trapezoidal shape in a plan view in which the length in the vehicle longitudinal direction is longer in the vehicle width direction than in the vehicle width direction. In the floor member,
2. A front projection that protrudes upward from the vehicle along the front end of the belt anchor, in the state where the belt anchor is fixed, in the vehicle front side of the belt anchor and close to the extension portion. The rear body structure of the vehicle according to claim 1 or 2.

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