JP2018122724A - Rear seat belt anchor fastening structure of automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rear seat belt anchor fastening structure of an automobile that allows the automobile having a driving battery arranged under a rear seat to reduce movements of a rear seat belt anchor at the time of a collision with a simple configuration.SOLUTION: A rear seat belt anchor fastening structure 200 has: a driving battery arrangement space forming part 101 which forms a driving battery arrangement space BS for arranging a driving battery BT between a rear seat RS and a fifth floor surface FP5 below the seat and has a top plate part 101a for placing the rear seat RS and a frame part 101b under the rear seat RS, which is fixed to the fifth floor surface FP5 under the rear seat RS and to a third floor surface FP3 at a rear side of the vehicle of the rear seat RS; a rear seat belt anchor SA to be fixed to a second floor surface FP2 at the rear side of the vehicle of the rear seat RS; and a rear seat belt anchor fastening reinforcement part 201 arranged across a fixed position of the second floor surface FP2 of the rear seat belt anchor SA and a fixed position of the third floor surface FP3 of the driving battery arrangement space forming part 101.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a rear seat belt anchor fixing structure for an automobile, and more particularly to a structure for fixing a rear seat belt anchor to a floor panel.

  A conventional rear seat belt anchor fixing structure of an automobile will be described with reference to the rear body structure of the automobile shown in FIG. A closed cross-section 9 in the vehicle width direction across the left and right rear side members 1 is formed by jointly arranging a reinforcement 6 having a substantially L-shaped cross section on the rear side of the rising wall 4c at the boundary between the front portion 4a and the rear portion 4b of the rear floor panel 4. The belt anchor 13 of the rear seat belt 12 is fastened and fixed to the overlap portion of the bead portion 10 bulging and formed in the closed cross-section portion 9 and the rising wall 4c, so that the surface rigidity of the fixing portion of the belt anchor 13 is fixed. The occupant restraining force input to the fixed portion can be distributed and distributed from the closed cross-section portion 9 to the rear side member 1, so that the mounting rigidity of the belt anchor 13 can be increased and the closed cross-section portion 9 can be Torsional rigidity at the rear of the vehicle body and the rigidity in the vehicle width direction. This improves the mounting rigidity of the rear seat belt anchor and the torsional rigidity and the vehicle width direction rigidity of the rear part of the vehicle body (see Patent Document 1).

JP-A-10-147210

  However, the above-described vehicle body rear structure has the following points to be improved. A reinforcement 6 is joined to the rear side of the rising wall 4c at the boundary of the rear floor panel 4 to form a closed cross section 9 that functions as a rear cross member, and a rear seat is formed at the overlapping portion of the closed cross section 9 and the rising wall 4c. A belt anchor 13 of the belt 12 is fastened and fixed. On the other hand, in an automobile in which a driving battery is arranged under the rear seat, an L-shaped driving battery arrangement space forming portion for forming a driving battery arrangement space for arranging the driving battery under the rear seat is arranged. The drive battery arrangement space forming portion is connected and fixed to the floor panel below the rear seat and behind the rear seat. In a vehicle in which a drive battery arrangement space forming portion is arranged, a closed cross-section portion 9 functioning as a rear cross member is formed on the rear side of the rising wall 4c at the boundary of the rear floor panel 4, and the belt anchor 13 is overlappedly fastened. However, there are points to be improved that the number of parts increases, the configuration becomes complicated, the cost is increased, and the weight is increased.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a rear seat belt anchor fixing structure for an automobile that can reduce the movement of the rear seat belt anchor at the time of a collision with a simple configuration in an automobile in which a driving battery is disposed under the rear seat.

  Means for solving the problems in the present invention and the effects of the invention will be described below.

  The rear seat belt anchor fixing structure for a vehicle according to the present invention includes a driving battery arrangement space for arranging a driving battery between a rear seat and a floor surface under the rear seat. A drive battery arrangement space forming portion having a rear seat placement portion for placing the rear seat under the rear seat, the floor surface under the rear seat, and the rear seat of the rear seat in the vehicle The driving battery arrangement space forming portion fixed to the floor surface, the rear seat belt anchor fixed to the floor surface behind the vehicle of the rear seat, and the driving battery arrangement from the fixed position of the floor surface of the rear seat belt anchor Up to the fixed position on the floor surface of the rear seat of the rear seat of the space forming portion, Rear seat belt anchor fixing reinforcing part arranged along the vehicle lower side of the lower surface, has a.

  As a result, the rear seat belt anchor fixing / reinforcing portion transmits a force acting obliquely forward of the vehicle to the rear seat belt anchor to the driving battery arrangement space forming portion, and the driving battery arrangement space forming portion has a slight amount. Therefore, the rear seat belt anchor connected to the drive battery arrangement space forming portion via the floor surface can also reduce the movement.

It is the schematic perspective view which looked at the rear seat RS vicinity of the motor vehicle AM which has the rear seat belt anchor fixing structure 200 of the motor vehicle based on one Embodiment which concerns on this invention from the front upper direction. It is the schematic perspective view which looked at the rear seat RS vicinity of the motor vehicle from the back lower direction. It is the figure which looked at the connection part 103 vicinity from the vehicle front. It is a figure which shows the cross section in the arrangement position of the rear seatbelt anchor fixation reinforcement part 201. FIG. It is a figure which shows the rear seat belt anchor fixing structure of the conventional motor vehicle.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  A rear seat belt anchor fixing structure 200 (hereinafter, referred to as a rear seat belt anchor fixing structure 200) of an automobile according to the present invention is formed in an automobile AM on which a driving battery BT is mounted. FIG. 1 is a schematic perspective view of the structure of the automobile AM in which the rear seat belt anchor fixing structure 200 is formed, as viewed from the front upper direction in the vicinity of the rear seat RS of the vehicle. FIG. 2 showing a general perspective view, FIG. 3 showing a view of the vicinity of the connecting portion 103 from the front of the vehicle, and FIG. 4 showing a cross section at the arrangement position of the rear seat belt anchor fixing reinforcing portion 201 will be described. In addition, in each drawing including FIG. 1, a description of a structure necessary for connecting and fixing each component to another component, for example, a flange, is omitted. In the following description, the left-right direction is shown toward the front of the vehicle.

  As shown in FIG. 1, the automobile AM is an automobile that obtains driving force using a driving battery BT. As an automobile that obtains driving force using the drive battery BT, for example, there is a hybrid automobile. The automobile AM has a driving battery BT mounted in a driving battery arrangement space BS (described later) formed between the rear side of the vehicle and under the rear seat RS between the floor panels FP.

  As shown in FIG. 2, the automobile AM has side members SM in the vicinity of the left and right ends of the vehicle along the vehicle longitudinal direction. As shown in FIG. 2, the side member SM has an upper surface on the vehicle upper side than a fifth floor surface FP5 (described later) of the floor panel FP on which the lower surface of the drive battery arrangement space BS is arranged.

  As shown in FIG. 1, the automobile AM has a stepped floor panel FP from the rear of the vehicle to the bottom of the rear seat RS. The floor panel FP includes a first floor surface FP1, a second floor surface FP2, a third floor surface FP3, a fourth floor surface FP4, and a fifth floor surface that are continuously located from the vehicle rear side toward the vehicle front side. It has FP5. The first floor surface FP1 is formed by a horizontal plane and is located highest in the vehicle vertical direction. The first floor surface FP1 forms a bottom surface of a so-called trunk space. The second floor surface FP2 is formed by a slope that faces obliquely forward and downward from the first floor surface FP1 in the vehicle vertical direction. Two rear seat belt anchors SA are attached to the second floor surface FP2 at predetermined positions. The floor panel FP is supported by a floor panel support member FPS from the vehicle rear side (see FIG. 2). The end portion of the floor panel support member FPS on the vehicle front side is connected to the side member SM.

  The third floor surface FP3 is formed by a short horizontal plane in the vehicle front-rear direction. The fourth floor surface FP4 is formed as a vertical surface along the vehicle vertical direction. The fifth floor surface FP5 is formed by a horizontal plane and is located lowest in the vehicle vertical direction. The fifth floor surface FP5 forms a so-called rear seat floor surface.

  As shown in FIG. 1, the rear seat belt anchor SA is a second floor surface FP2 of the floor panel FP that is positioned in the immediate rear of the vehicle with respect to the rear seat RS that is disposed above the vehicle with respect to the driving battery arrangement space forming portion 101. Placed in. Two rear seat belt anchors SA are arranged on the second floor surface FP2 along the vehicle horizontal direction.

First drive battery protection structure 100
As shown in FIG. 1, the drive battery protection structure 100 includes a drive battery arrangement space forming part 101, a side member connection part 103, and a buffer part 105. The driving battery arrangement space forming part 101 includes a top board part 101a, a frame part 101b, and a support part 101c.

  The top plate portion 101a is formed of a thin metal plate and has an elliptical shape in plan view and deformation. A rear seat RS is placed on the vehicle upper side of the top plate portion 101a. The top plate portion 101a includes an intermediate top plate portion 101a1, an upper top plate reinforcing portion 101a3, and a lower top plate reinforcing portion 101a5 (see FIG. 4). The intermediate top plate portion 101a is formed with a bead along the vehicle front-rear direction at the center portion, and a bead along the vehicle left-right direction on the right side and left side of the center portion. It has a predetermined thickness. In FIG. 1, the description of the beads is omitted. The upper top plate reinforcing portion 101a3 is disposed on the vehicle upper side of the central portion of the intermediate top plate portion 101a1. Similarly, the lower top plate reinforcing portion 105a5 is disposed on the vehicle lower side of the central portion of the intermediate top plate portion 101a1. Thus, the strength of the top plate portion 101a is increased by making the top plate portion 101a on which the rear seat RS is placed a multilayer structure. Further, by arranging the upper top plate reinforcing portion 101a3 and the lower top plate reinforcing portion 105a5 only in a place where strength is required with respect to the intermediate top plate portion 101a1, it is possible to reduce the weight while securing the strength. .

  The frame portion 101b is formed of a pipe having a predetermined diameter, and has a deformed elliptical shape along a shape larger than the shape of the top plate portion 101a. The top plate 101a is connected and fixed on the frame 101b. As shown in FIG. 4, the frame portion 101b is connected and fixed to the third floor surface FP3. The frame portion 101b is fixed to the third floor surface FP3 and is also fixed integrally to the top plate portion 101a. The frame portion 101b is firmly fixed to the floor panel FP because it is fixed to the fifth floor surface FP5 (described later) via the third floor surface FP3 and the support portion 101c. In addition, a rear seat placing portion is formed by the top plate portion 101a and the frame portion 101b.

  As shown in FIG. 1, the support portion 101c is formed of a thin metal plate and has a rectangular shape. The support portion 101c is connected along the vehicle vertical direction to the frame portion 101b in front of the vehicle and the fifth floor surface FP5 of the floor panel FP. The support portion 101c supports the frame portion 101b with respect to the fifth floor surface FP5.

  Here, the battery arrangement space BS for driving includes the upper surface formed by the top plate portion 101a and the frame portion 101b, the front surface formed by the support portion 101c, the lower surface formed by the fifth floor surface FP5 of the floor panel FP, the floor It is formed by the rear surface formed by the fourth floor surface FP4 of the panel FP. The driving battery arrangement space forming unit 101 is formed so as not to affect the performance of the driving battery BT arranged in the driving battery arrangement space BS even if a predetermined force is applied along the vehicle vertical direction. Is done. The predetermined force that acts on the drive battery arrangement space forming unit 101 is, for example, a predetermined 30 kgf dumbbell that is directed downward through the rear seat RS arranged on the vehicle upper side of the drive battery arrangement space forming unit 101. Set the force when dropping from height.

  The connection part 103 is formed of a thin metal plate. The connection part 103 is arrange | positioned so that the buffer part 105 may be connected from the connection part arrangement | positioning area | region R101b which goes to the front of the flame | frame part 101b, and diagonal right back. In addition, since the buffer part 105 is located below the vehicle right side of the connection part arrangement region R101b of the frame part 101b, that is, below the vehicle outside, the connection part 103 is diagonally viewed from the buffer part 105. It arrange | positions so that the flame | frame part 101b may be supported along upper direction.

  The buffer portion 105 is formed of a metal thin plate, and has a protruding portion 105a with one apex protruding upward of the vehicle. The protrusion 105a (see FIG. 3) is disposed on the vehicle inner side with respect to the side member SM. In addition, the buffer part 105 is connected to the front surface of the vehicle front side so as to follow the end part of the side member SM on the vehicle inner side. The buffer portion 105 is fixed to the side member SM and the fifth floor surface FP5 of the floor panel FP. The shock absorber 105 absorbs the impact force received by the side member SM against a collision from the side of the vehicle by deforming its own shape. The connecting portion 103 is connected and fixed to the protruding portion 105a.

Operation of Second Driving Battery Protection Structure 100 As shown in FIG. 3, when a force F acts on the vehicle from the side as in a side collision, the force F1 first acts on the side member SM, and the side The member SM is deformed. Further, the force F1 acts on the buffer portion 105 via the side member SM. The buffer part 105 absorbs the force F by deforming its own shape. Further, the force F <b> 1 acts on the connection portion 103 connected to the buffer portion 105 via the buffer portion 105. The connecting portion 103 transmits a force F1 directed toward the inside of the vehicle, that is, the driving battery placement space BS, along itself, that is, obliquely upward (in the direction of the arrow a3) from the buffer portion 105 to the frame portion 101b. A force F1 ′ acting on the top plate portion 101a is assumed. The top plate portion 101a and the frame portion 101b are firmly connected to the third floor surface FP3 of the floor panel FP, and are also connected to the fifth floor surface FP5 of the floor panel FP by the support portion 101c. The force F is absorbed by deforming. Thereby, the drive battery arrangement space BS can be protected, and as a result, the drive battery BT arranged in the drive battery arrangement space BS can be protected.

Third rear seat belt anchor fixing structure 200
As shown in FIG. 2, the rear seat belt anchor fixing structure 200 strongly strengthens the rear seat belt anchor SA disposed on the second floor surface FP <b> 2 located behind the rear seat RS in the automobile AM having the driving battery protection structure 100. It is a structure for fixing. The rear seat belt anchor fixing structure 200 includes a floor panel FP, a rear seat belt anchor SA, a driving battery protection structure 100 (see FIG. 1), and a seat belt anchor fixing reinforcing portion 201.

  As shown in FIG. 4, the rear seat belt anchor fixing reinforcement portion 201 is formed of a metal plate-like member. The rear seat belt anchor fixing reinforcing portion 201 is on the vehicle lower side of the second floor surface FP2 and the third floor surface FP3 of the floor panel FP, that is, along the surface opposite to the surface on which the rear seat belt anchor SA is fixed. Be placed. In the rear seat belt anchor fixing and reinforcing portion 201, one end is connected to the rear seat belt anchor SA via the second floor surface FP2, and the other end is connected to the frame of the driving battery arrangement space forming portion 101 via the third floor surface FP3. Connected to the unit 101b. That is, the rear seat belt anchor fixing reinforcing portion 201 is arranged from the second floor surface FP2 to the third floor surface FP3.

Operation of the Fourth Rear Seat Belt Anchor Fixing Structure 200 Since the rear seat belt anchor fixing reinforcing portion 201 is fixed integrally with the third floor surface FP3 and the frame portion 101b, the vehicle with respect to the rear seat belt anchor SA at the time of a vehicle collision. The force F2 acting obliquely forward is transmitted to the frame portion 101b and, consequently, the driving battery arrangement space forming portion 101 as a downward force F2 ′ acting on the frame portion 101b. The driving battery arrangement space forming portion 101 is fixed to the floor panel FP via the frame portion 101b and is fixed to the floor panel FP via the support portion 101c, and thus has a strong structure. Yes. Therefore, the driving battery arrangement space forming portion 101 can counteract the force F2 ′ acting via the rear seat belt anchor fixing reinforcement portion 201 with a slight deformation. As a result, the movement of the rear seat belt anchor SA can be reduced.

  In addition, by connecting to the floor panel FP together with the frame portion 101b of the driving battery arrangement space forming portion 101 located in the vicinity of the rear seat belt anchor SA, the length of itself can be shortened. For example, the length of the entire rear seat belt anchor fixing / reinforcing portion 201 can be shortened as compared with the case where the rear seat RS is connected to another cross member that has been disposed farther behind the vehicle than the rear seat RS. The material necessary for forming the anchor fixing reinforcing portion 201 can be reduced, and the weight of the rear seat belt anchor fixing reinforcing portion 201 itself can be reduced.

[Other Embodiments]
(1) Buffer unit 105: In the first embodiment, the connection unit 103 is connected to the side member SM via the buffer unit 105. However, the buffer unit 105 is not disposed, and is directly connected to the side member SM. You may make it connect.

  (2) Shape of the top plate portion 101a and the frame portion 101b: In the above-described first embodiment, the top plate portion 101a and the frame portion 101b are deformed elliptical shapes. However, the rear seat RS can be disposed above the vehicle, and the vehicle lower portion As long as the drive battery arrangement space BS can be formed, the present invention is not limited to the example. For example, the top plate portion 101a and the frame portion 101b may be rectangular.

  (3) Upper top plate reinforcing portion 101a3, lower top plate reinforcing portion 101a5: In the above-described first embodiment, the upper top plate reinforcing portion 101a3 and the lower top plate are reinforced vertically with respect to the intermediate top plate portion 101a1. Although the part 101a5 is arranged, either one may be arranged. In addition, neither of them may be arranged. Furthermore, the arrangement positions of the upper top plate reinforcing portion 101a3 and the lower top plate reinforcing portion 101a5 may be arranged at a portion where strength is required, not the central portion of the intermediate top plate portion 101a1.

  (4) Connection unit 103: In the above-described first embodiment, the connection unit 103 is arranged only on one side, but may be arranged on both the left and right sides.

  (5) Reinforcement of the top plate portion 101a: In the above-described first embodiment, in order to reinforce the top plate portion 101a, another reinforcing member, for example, a flat plate having a predetermined strength is used on either the upper surface or the lower surface of the top plate portion 101a. You may make it arrange | position to one or both.

DESCRIPTION OF SYMBOLS 100 Drive battery protection structure 101 Drive battery arrangement space formation part 101a Top plate part 101a1 Middle top plate part 101a3 Upper top plate reinforcement part 101a5 Lower top plate reinforcement part 101b Frame part R101b Connection part arrangement area 101c Support part 103 Connection part 105 Buffer 105a Projection 200 Rear Seat Belt Anchor Fixing Structure 201 Rear Seat Belt Anchor Fixing / Reinforcement AM Automobile RS Rear Seat BT Drive Battery BS Drive Battery Placement Space SM Side Member FP Floor Panel FP1 First Floor Surface FP2 Second Floor Surface FP3 3rd floor surface FP4 4th floor surface FP5 5th floor surface SA Rear seat belt anchor

Claims (1)

In an automobile having a drive battery arrangement space for arranging a drive battery between a rear seat and a floor surface under the rear seat,
The drive battery arrangement space forming portion that forms the drive battery arrangement space and has a rear seat placement portion for placing the rear seat under the rear seat, the floor surface under the rear seat, and A driving battery arrangement space forming portion fixed to the floor surface of the rear seat behind the vehicle;
A rear seat belt anchor fixed to the floor surface of the rear seat behind the vehicle;
From the fixed position of the floor surface of the rear seat belt anchor to the fixed position of the driving battery arrangement space forming portion to the floor surface of the rear seat of the rear seat of the rear seat belt anchor, it is arranged along the vehicle lower side of the floor surface. Rear seat belt anchor fixing reinforcement,
A rear seat belt anchor fixing structure of an automobile having

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