JP4412811B2 - Rear floor structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a rear floor structure of an automobile, and more particularly to a rear floor structure in the vicinity of a rear seat.
[0002]
[Prior art]
Japanese Utility Model Publication No. 50-587 discloses a technique for preventing deformation of the rear floor panel when a large load is applied to the seat belt toward the front of the vehicle body. FIG. 4 shows the prior art disclosed in the publication. In the figure, reference numeral 101 denotes a rear floor panel of the automobile, reference numeral 102 denotes a rear seat mounted and fixed on the upper surface of the rear floor panel 101, and reference numeral 103 denotes a frame extending in the longitudinal direction of the vehicle body below the rear floor panel 101.
[0003]
Reference numeral 104 denotes an inner belt anchor that detachably engages a tongue plate of a seat belt (not shown), and is fixed to the upper surface of the rear floor panel 101 via a belt anchor 105.
[0004]
According to this publication, when a large forward load is applied to the seat belt, the entire rear floor panel 101 is deformed in a lifting direction, and the positions of the belt anchor 105 and the rear seat 102 fixed to the rear floor panel 101 are moved. In such a case, a connection fitting 106 for connecting the belt anchor 105 to the frame 103 is provided, and the load is received by the frame 103 to suppress the deformation of the rear floor panel 101, and the rear seat 102 and the belt anchor 105 Prevents movement.
[0005]
[Problems to be solved by the invention]
However, both the rear floor panel 101 and the frame 103 need to be provided with the connecting fittings 106, and the mounting work needs to be performed in a narrow space between the rear floor panel 101 and the frame 103. There is a problem that the number of manufacturing processes increases. In addition, there is a problem that a new reinforcing member needs to be provided when the frame 103 does not exist at a position corresponding to the attachment position of the belt anchor. Furthermore, in the case of a vehicle body layout having a fuel tank below the rear seat 102, it is difficult to secure an installation space for the frame 103 and the coupling metal 106.
[0006]
In the case of a rear floor structure having a vertical wall portion standing from the rear end of the seat placement portion on which the seat cushion of the rear seat is placed and having a belt anchor mounting portion of the seat belt on the vertical wall portion, When the impact load is applied, the load concentrates on the vertical wall portion, the seat placement portion rises, and the seat cushion is inclined forward to affect the seated person.
[0007]
The present invention has been made in view of the above points, and an object of the present invention is to provide a rear floor structure that prevents the movement of the seating position by suppressing the movement of the mounting position of the seat and belt anchor mounting portion. .
[0008]
[Means for Solving the Problems]
The rear floor structure according to the first aspect of the present invention that solves the above-described problems includes a seat placement portion on which a seat cushion of a rear seat is placed and having a cross member at the front end, and a rear seat belt that stands up from the rear end of the seat placement portion. in the belt anchor attachment portion rear floor comprises a cushion floor pan having a vertical wall portion provided structure, both when connecting the said cross member to said cushion floor on bread belt anchor attachment portion, a rear portion of the cushion floor pan A seat back support bracket disposed on the floor surface and supporting the seat back of the rear seat is connected by providing a phosphorus reinforcement extending in the longitudinal direction of the vehicle body .
[0009]
Since the invention according to claim 1 is provided with the phosphorus reinforcement that connects the cross member, the belt anchor mounting portion, and the seat back support bracket and the seat back support bracket on the cushion floor pan, a large load directed forward with respect to the seat belt. When the belt anchor mounting part is pulled forward by the seat belt and a tensile load is applied to the vertical wall part, the tensile load is connected via the seat back support bracket and phosphorus reinforcement. It can be received by a cross member and can be dispersed throughout the vehicle body.
[0010]
Accordingly, the seat placement portion is prevented from rising due to the load on the vertical wall portion, the movement of the rear seat and the belt anchor due to the deformation of the cushion floor pan is prevented, and the seated person is held at an appropriate position on the rear seat. be able to. Further, since the phosphorus reinforcement is provided on the cushion floor pan, the attachment work can be easily performed.
[0011]
A rear floor structure according to a second aspect of the present invention is disposed on a floor surface extending rearward from a rear portion of the cushion floor pan, supports a seat back of the rear seat, and a front portion thereof is the belt anchor. A seat back support bracket coupled to the mounting portion and a phosphorus reinforcement for connecting the cross member and the belt anchor mounting portion are separately provided, and the front end portion of the seat back support bracket is provided by the belt anchor mounting portion. And a rear end portion of the phosphorus reinforcement .
[0012]
The invention according to claim 2 is a seat back which is disposed on the floor surface extending rearward from the rear portion of the cushion floor pan, supports the seat back of the rear seat, and the front portion is coupled to the belt anchor mounting portion. Since it is coupled with the support bracket and the belt anchor attachment part at the rear end of the phosphorus reinforcement, it can receive the load applied to the vertical wall part in cooperation with the phosphorus reinforcement and prevent the deformation of the cushion floor pan. be able to.
[0013]
In the rear floor structure according to the third aspect of the present invention, the seat back support bracket has a through hole into which the cylindrical portion of the stepped bolt inserted from below into the opening hole of the floor surface is inserted, It is fixed to the floor surface by screwing a nut.
[0014]
According to the invention of claim 3, the seat back support bracket has a cylindrical portion of a stepped bolt projecting above the floor surface in the through hole, and is fixed to the floor surface by screwing the nut to the stepped bolt. Therefore, for example, when a large load directed forward is applied to the seat back support bracket, the cylinder of the stepped bolt that is fitted in the through hole with the shear stress generated between the floor portion and the seat back support bracket Can be received by the department. Therefore, the load can be sufficiently received without reinforcing the rigidity of the peripheral members, and the seat back support bracket can be firmly fixed to the floor surface.
[0015]
The rear floor structure according to the invention described in claim 4 is characterized in that the phosphorus reinforcement includes a holding portion for holding the routing object.
[0016]
According to the fourth aspect of the present invention, since the reinforcement includes the holding portion for holding the routing object, for example, the routing object such as a cable wire connected to the trunk lid opener is used as the holding portion of the phosphorus reinforcement. Can be retained. Therefore, the routing object can be easily held on the rear floor panel.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of the present invention will be described with reference to FIGS. In the figure, the arrow Fr indicates the front side of the vehicle body, the arrow Up indicates the upper side of the vehicle body, and the arrow In indicates the vehicle interior side.
[0018]
FIG. 1 is a perspective view of a rear floor panel, and FIG. 2 is a view taken along the line AA in FIG. The rear floor panel 1 has a front end coupled to a rear end of a front floor panel (not shown) and extends rearward to form a rear floor of the automobile. A step which is coupled to the front floor panel and extends upward. A seat placing portion 4 that is bent rearward at the upper end of the portion 2 and on which the seat cushion 3 (see FIG. 2) is placed, and a vertical wall that is bent upward at the rear end of the seat placing portion 4 and stands upright. A cushion floor pan 6 having a portion 5 is provided.
[0019]
As shown in FIG. 1, the seat placement portion 4 includes a front end portion 7 that is bulged upward so as to extend in the vehicle width direction at the front end portion, and a front-rear direction at the center portion in the vehicle width direction. And a cross member forming member 10 is provided in the vehicle width direction on the lower surface side of the front end portion 7 (see FIG. (See FIG. 2). As shown in FIG. 2, the cross member forming member 10 has a substantially L-shaped cross section, one end coupled to the lower end of the stepped portion 2, and the other end to the lower surface of the sheet placing portion 4. By being joined, a closed cross section is formed, and a cross member 11 is formed at the front portion of the cushion floor pan.
[0020]
A fixing bolt 12 for phosphorus reinforcement is erected on the front end portion 7 of the sheet placing portion 4. As shown in FIG. 1, two fixing bolts 12 are provided in the vicinity of the left and right ends of the raised portion 8. As shown in FIG. 2, the reinforcing plate 13 is provided at a portion where the fixing bolt 12 is provided so as to overlap the lower surface of the sheet placing portion 4 between the cross member forming member 10 and the sheet placing portion 4. Is provided and forms part of the cross member 11. A fuel tank 15 is provided below the sheet placement unit 4 so as to be along the lower surface of the sheet placement unit 4.
[0021]
Bolt holes 26 for attaching the belt anchor attaching portion 21 are provided in the vertical wall portion 5 that forms the rear portion of the cushion floor pan 6. The bolt hole 26 is provided so as to be positioned behind each fixing bolt 12 erected on the front end portion 7, and a weld nut 27 is welded to the rear surface side of the vertical wall portion 5. Further, a reinforcing member 28 for reinforcing rigidity around the weld nut 27 of the vertical wall 5 is provided on the rear surface of the vertical wall 5. The reinforcing member 28 has a bowl shape in which a horizontal cross section that extends in the vertical direction on the rear surface side of the vertical wall portion 5 and forms a closed cross section with the vertical wall portion 5 is substantially U-shaped or C-shaped.
[0022]
Further, a luggage compartment floor (floor surface) 40 is continuously formed at the rear portion of the rear floor panel 1 so as to extend rearward from the upper end of the vertical wall portion 5, and the cargo compartment floor 40 has an opening hole 41. Each bolt hole 26 is formed so as to be located behind each bolt hole 26. The opening holes 41 are spaced apart from each other in the front-rear direction, and stepped bolts 42 for fixing the seat back support bracket 50 are inserted and erected.
[0023]
The stepped bolt 42 has a screw portion 43 that is inserted into the opening hole 41 from below and protrudes onto the cargo compartment floor 40, and a flat head 45 that is welded to the lower surface of the cargo compartment floor 40. A cylindrical portion 44 having a larger diameter than the screw portion 43 and a predetermined height is provided between the portion 43 and the head portion 45.
[0024]
On the rear floor panel 1 having the above-described configuration, the phosphorus reinforcement 30, the seat back support bracket 50, the anchor attachment portion 21, and the routing object 60 are attached. Hereinafter, the structure of each member is demonstrated along the order of attachment.
[0025]
The seat back support bracket 50 has a fixed plate 51 that is in contact with the cargo compartment floor 40, and a hinge plate 52 is erected on the outer end in the vehicle width direction of the fixed plate 51.
[0026]
The fixing plate 51 is provided with two through holes 53 into which the stepped bolts 42 can be inserted and into which the cylindrical portion 44 can be fitted. The hinge plate 52 has a support hole 54 for attaching and supporting the seat back 9. Is provided. A connecting plate 56 that extends along the vertical wall portion 5 and is connected and fixed to the belt anchor mounting portion 21 is provided at the front portion of the fixing plate 51. The connecting plate 56 has a tip 58 that is interposed between the phosphorus reinforcement 30 and the sheet placing portion 4, and the anchor bolt 20 can be inserted into a portion of the vertical wall 5 that faces the bolt hole 26. A fixed hole 57 is formed.
[0027]
The reinforcement 30 has a band plate shape extending in the longitudinal direction of the vehicle body along the cushion floor pan 6, and a bead portion 37 is provided in the extending direction. FIG. 3 is a BB line arrow view of FIG. The bead portion 37 is formed by a plurality of groove-like bodies that are continuously recessed in the extending direction. Further, protrusions 38 that are bent downward and continue in the extending direction are provided at both side edges of the phosphorus reinforcement 30, and the rigidity in the extending direction of the phosphorus reinforcement 30 is increased together with the bead portion 37. ing.
[0028]
A front fixing hole 33 through which the fixing bolt 12 is inserted and a clip hole 34 for holding the routing object are provided in the front portion 31 that is in contact with the front end portion 7 of the sheet placing portion 4. A rear fixing hole 35 into which the anchor bolt 20 can be inserted is provided at a position facing the bolt hole 26 of the vertical wall portion 5 in the rear portion 32 that is in contact with the vertical wall portion 5.
[0029]
As shown in FIG. 2, the belt anchor attachment portion 21 is formed by bending a flat plate member into a substantially L shape, and the anchor bolt 20 is inserted into the contact piece 22 that contacts the vertical wall portion 5. A fixing hole 23 (see FIG. 1) is provided, and an upright piece 24 standing from the vertical wall portion 5 is provided with a mounting hole 25 (see FIG. 1) to which a base end portion (not shown) of the inner belt anchor is attached. ing. A tongue plate of the seat belt is locked to the inner belt anchor (none of them is shown).
[0030]
The arrangement 60 is for opening a fail flag and a trunk lid (both not shown) provided at the rear part of the vehicle body, one end of which is connected to an operation lever provided in the vicinity of the driver's seat, and the other end is provided. As shown in FIG. 1, it has an inner cable 61 connected to a fail flag opener or a rear trunk opener provided at the rear of the vehicle body, and an outer tube 62 that guides the inner cable 61 so that it can reciprocate inward. The side position of the rear floor panel 1 extends rearward from the front end, is bent toward the vehicle inner side on the cross member 11, extends in the vehicle width direction along the cross member 11, and the other side It is formed in a substantially crank shape that is bent and extends rearward at one position.
[0031]
Each member having the above configuration is attached to the rear floor panel 1 in the order of the seat back support bracket 50, the phosphorus reinforcement 30, the belt anchor attachment portion 21, and the routing object 60. First, the seat back support bracket 50 is disposed on the luggage compartment floor 40 so that the through hole 53 is inserted into the stepped bolt 42 erected on the cargo compartment floor 40, and the nut 46 is screwed onto the stepped bolt 42. Fix together. As a result, the cylindrical portion 44 of the stepped bolt 42 is fitted into the through hole 53.
[0032]
Next, the cushion floor is such that the front fixing hole 33 of the phosphorus reinforcement 30 is inserted by the fixing bolt 12 and the rear fixing hole 35 communicates with the fixing hole 57 of the connecting plate 56 and the bolt hole 26 of the vertical wall portion 5. The phosphorus reinforcement 30 is disposed on the pan 6, and the nut 16 is screwed onto the fixing bolt 12 to connect the front portion 31 of the phosphorus reinforcement 30 to the cross member 11.
[0033]
Then, the anchor bolt 20 inserted through the fixing hole 23 of the belt anchor attaching portion 21 is screwed into the bolt hole 26 through the rear fixing hole 35 and the fixing hole 57 of the connecting plate 56. As a result, the belt anchor mounting portion 21, the rear portion 32 of the phosphorus reinforcement 30, and the connecting plate 56 of the seat back support bracket 50 are fixed to the vertical wall portion 5 by the common anchor bolt 20.
[0034]
Accordingly, the rear portion 32 of the reinforcement 30 is coupled to the belt anchor mounting portion 21, and the connecting plate 56 of the seat back support bracket 50 is coupled to the belt anchor mounting portion 21.
[0035]
The arrangement object 60 is held by a clip (holding part) 63 so as to be arranged in parallel, and the clip 63 is inserted into a clip hole (holding part) 34 provided in the front part 31 of the phosphorus 30. By doing so, it is fixed on the rear floor panel 1.
[0036]
In this assembled state, the phosphorus reinforcement 30 has the front part 31 connected to the cross member 11 and the rear part 32 connected to the belt anchor mounting part 21 on the cushion floor pan 6, so The rigidity is improved.
[0037]
Therefore, when an impact load from the seat belt acts on the vertical wall portion 5, the load is received by the highly rigid cross member 11 connected to the front portion 31 of the phosphorus reinforcement 30 and dispersed throughout the vehicle body. be able to. Therefore, the movement of the positions of the rear seat and the belt anchor due to the deformation of the cushion floor pan can be prevented, and the seated person can be held at an appropriate position on the rear seat.
[0038]
Since the connecting plate 56 is coupled to the belt anchor mounting portion 21, the seat back support bracket 50 has an action that resists the force that pulls the lower portion of the vertical wall portion 5 forward and upward. Moreover, since the front-end | tip part 58 of the connection plate 56 interposes between the sheet | seat mounting part 4 and the phosphorus reinforcement 30, it is the force which pulls the lower part of the vertical wall part 5 forward front by cooperation with the phosphorus reinforcement 30. Has an action to counteract. Thereby, the rigidity of the rear floor pan 6 can be further improved.
[0039]
Therefore, when an impact load from the seat belt acts on the vertical wall portion 5, the cushion floor pan 6 can be prevented from being deformed, and the positions of the rear seat and the belt anchor can be maintained at appropriate positions. The person can be held in an appropriate position on the rear seat.
[0040]
Further, the seat back support bracket 50 is fixed by a stepped bolt 42 in which a fixed plate 51 is erected on the cargo floor 40, and the cylindrical portion 44 of the stepped bolt 42 is fitted in the through hole 53 of the fixed plate 51. Therefore, when an impact load is applied, a shearing force generated between the seat back support bracket 50 and the cargo compartment floor 40 can be received. Therefore, the load can be sufficiently received without enhancing the rigidity of the peripheral members, and the change in the positions of the rear seat and the belt anchor can be prevented.
[0041]
Further, in the case of the rear floor structure having the above configuration, the phosphorus reinforcement 30 is provided on the upper surface side of the rear floor panel 1 and there is no protrusion on the lower surface side, so that the fuel tank 15 is brought closer to the seat mounting portion 4. Thus, a larger capacity of the fuel tank 15 can be secured, and a sufficient load clearance can be secured.
[0042]
Further, since the clip hole 34 is provided in the phosphorus reinforcement 30 and the clip 63 holding the routing object 60 is attached to the clip hole 34, the routing object 60 can be easily held on the rear floor panel 1.
[0043]
【The invention's effect】
As described above, according to the rear floor structure according to the present invention, since the reinforcement for connecting the cross member and the belt anchor mounting portion is provided on the cushion floor pan, the rigidity in the front-rear direction of the cushion floor pan is improved. Can do. Therefore, when the impact load from the seat belt acts on the vertical wall portion, the movement of the position of the rear seat and the belt anchor due to the deformation of the cushion floor pan can be prevented, and the seated person can be held at an appropriate position on the rear seat. .
[Brief description of the drawings]
FIG. 1 is a perspective view of a rear floor panel.
FIG. 2 is a cross-sectional view taken along line AA in FIG.
FIG. 3 is a cross-sectional view taken along line BB in FIG.
FIG. 4 is a side view showing a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Rear floor panel 4 Seat mounting part 5 Vertical wall part 6 Cushion floor pan 7 Front end part 11 Cross member 21 Belt anchor attaching part 30 Phosphorus reinforcement 50 Seat back support bracket 60 Arrangement thing 63 Clip

Claims (4)

A seat placement portion (4) having a seat cushion (3) on the rear seat and having a cross member (11) at the front end, and a belt anchor mounting portion of the rear seat belt standing from the rear end of the seat placement portion (4) In a rear floor structure comprising a cushion floor pan (6) having a vertical wall (5) provided with (21),
The flooring the on pan (6) wherein the cross member (11) a belt anchor attachment portion (21) when connecting the both is disposed on the rear floor surface of the cushion floor pan (6), and said rear seat A rear floor structure in which a seat back support bracket (50) for supporting the seat back is connected by providing a phosphorus reinforcement (30) extending in the longitudinal direction of the vehicle body . The cushion floor pan (6) is disposed on a floor surface extending rearward from the rear portion, supports the seat back of the rear seat, and the front portion is coupled to the belt anchor mounting portion (21). A seat back support bracket (50) and a phosphorus reinforcement (30) for connecting the cross member (11) and the belt anchor mounting portion (21) are separately provided, and the belt anchor mounting portion (21). The rear floor structure according to claim 1, wherein a front end portion of the seat back support bracket (50) and a rear end portion (32) of the phosphorus reinforcement (30) are coupled together . The seat back support bracket (50)
A through hole (53) into which a cylindrical portion (44) of a stepped bolt (42) inserted into the opening hole of the floor surface (40) from below is inserted;
The rear floor structure according to claim 1 or 2, wherein the rear floor structure is fixed to the floor surface by screwing a nut onto the stepped bolt (42). The phosphorus reinforcement (30)
Rear floor structure according to claim 1, characterized in that it comprises a holding portion (34) for holding the Haisakubutsu (60).

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