JP4485858B2 - Body structure - Google Patents

Description

  The present invention relates to a vehicle body structure that can secure a space for disposing a fuel tank.

In some vehicles, for example, when the rear seat is not used as a seat, the rear seat is folded and stored in the front foot space for the purpose of expanding the luggage space, and so-called dive-down storage is possible. . In order to enable such dive down storage, it is necessary to provide a mechanism for dive down storage in the rear seat, and a movement locus during dive down storage of the rear seat and a mechanism for dive down storage Due to the problem of interference, there is a case where the space for the fuel tank that is normally disposed below the rear seat is limited and the tank capacity cannot be secured. In order to eliminate such restrictions, there is one that employs a layout in which a fuel tank is disposed below the front seat (see, for example, Patent Document 1).
JP 2000-85382 A

  However, depending on the vehicle, the layout as described above may not be adopted. In this case, the fuel tank is disposed below the rear seat as usual. In this case, the component mounting bolt for the mechanism for dive-down storage of the rear seat may be attached to the lower position of the rear seat on the vehicle body floor, and the fuel tank is disposed in the lower position. There was a possibility that the tank capacity could not be secured due to restrictions. Of course, this problem is not limited to a dive-down storage mechanism, and is always a problem that arises when some component mounting bolt needs to be provided above the fuel tank on the vehicle body floor.

  Therefore, the present invention secures the tank capacity by eliminating the space restriction of the fuel tank as much as possible even if the component mounting bolt that penetrates the vehicle body floor is disposed at the upper position of the fuel tank on the vehicle body floor. The purpose is to provide a vehicle body structure that can be used.

In order to achieve the above object, the invention according to claim 1 is directed to disposing a fuel tank (for example, the fuel tank 63 in the embodiment) below the vehicle body floor (for example, the vehicle body floor 38 in the embodiment), In the vehicle body structure, component mounting bolts (for example, component mounting bolts 112 and 125 in the embodiment) penetrating the vehicle body floor are disposed at positions above the fuel tank in the vehicle body floor, and the component mounting bolts are disposed on the lower surface of the vehicle body floor. A cover member (for example, a seat stiffener 91 in the embodiment) interposed between the fuel tank and a protruding portion that protrudes from the vehicle body floor (for example, the protruding portions 113 and 126 in the embodiment) is fixed to the cover member. contact surface of the fuel tank (contact surface 117, 118 in the example embodiment) is provided, the cover member is inclined A bottom plate portion (for example, the inclined plate portion 92 and the rear extending plate portion in the embodiment) including an inclined plate portion (for example, the inclined plate portion 92 in the embodiment) extending obliquely along the lower (for example, the inclined floor 62 in the embodiment). 93), an annular plate portion bent upward from the peripheral portion of the bottom plate portion (for example, the annular plate portion 94 in the embodiment), and an annular flange portion bent outward from the peripheral portion of the annular plate portion (for example, the embodiment). And a flange portion 95) in the shape of a hat, and joined to the lower surface of a portion of the flange portion where the inclined floor of the floor panel of the vehicle body floor (for example, the floor panel 76 in the embodiment) is formed by welding. And a plate (for example, a sheet in the embodiment) so as to form a closed cross-sectional structure with the portion and to connect both side portions of the flange portion in the vehicle width direction. Plate 98) is joined to the flange portion, and a mounting hole (for example, mounting hole 107 in the embodiment) in which the component mounting bolt is inserted into the plate at a position inside the annular plate portion of the cover member. A weld nut (for example, the weld nut 108 in the embodiment) that is coaxial with the mounting hole and screwed into the component mounting bolt is fixed .

The invention according to a second aspect is the invention according to the first aspect, wherein the cover member is coupled to a vehicle body skeleton portion (for example, a vehicle body skeleton portion 67 in the embodiment) extending in the vehicle width direction before or after the cover member. It is characterized by becoming.

According to a third aspect of the present invention, in the second aspect of the invention, the cover member and the vehicle body skeleton portion are connected in a frame shape along the vehicle body floor so as to reinforce the vehicle body floor ( For example, it is characterized by constituting a part of the frame-like floor reinforcing portion 105) in the embodiment.

  According to the first aspect of the present invention, the cover member interposed between the protruding portion protruding from the vehicle body floor of the component mounting bolt penetrating the vehicle body floor at the upper position of the fuel tank and the fuel tank is fixed to the lower surface of the vehicle body floor. Therefore, even when the fuel tank is extended to the component mounting bolt side, the cover member can prevent interference between the fuel tank and the protruding portion of the component mounting bolt at the time of a vehicle collision or the like. In addition, since this cover member is provided with a fuel tank contact surface, this cover member can be used as a reference for mounting the fuel tank, and the fuel tank can be attached to the component mounting bolt without giving a margin for variations in the shape of the fuel tank. The shape can be extended to the side. Therefore, the space limitation of the fuel tank can be eliminated as much as possible, and the tank capacity can be secured. In addition, the cover member and the member provided with the contact surface of the fuel tank can be used together, and the cost can be reduced.

In addition, since the cover member has a closed cross-sectional structure with the vehicle body floor, the vehicle body strength can be improved and the fuel tank contacting the contact surface of the cover member can be stably supported.

According to the second aspect of the present invention, since the cover member is coupled to the vehicle body frame portion extending in the vehicle width direction before or after the cover member, the cover member projects from the vehicle body frame portion extending in the vehicle width direction. Thus, the strength of the vehicle body can be improved, and the fuel tank in contact with the contact surface of the cover member can be supported more stably.

According to the invention of claim 3 , the cover member and the vehicle body frame portion constitute a part of the frame-like floor reinforcing portion that reinforces the vehicle body floor by being connected in a frame shape along the vehicle body floor. The member can be effectively used as a part of the frame-like floor reinforcing portion.

  A vehicle body structure according to an embodiment of the present invention will be described below with reference to the drawings. Note that the front, rear, left, and right used in the following description are front, rear, left, and right in the vehicle body.

  As shown in FIG. 1, in the vehicle interior of the vehicle to which the vehicle body structure of the present embodiment is applied, a pair of side seats 11 in which front seats 10 in the first row from the front are arranged on both the left and right sides and these side portions The rear seat 20 in the second row from the front is also arranged between the pair of side seats 21 arranged on the left and right sides and the side seats 21. It consists of a central seat 22 and can seat 6 people. A luggage compartment 30 is provided immediately after the rear seat 20.

  Each of the pair of left and right side seats 11 of the front seat 10 includes a seat cushion 13 and a seat back 14, and each slides forward and backward by a slide mechanism 15 provided below the seat cushion 13. It is possible. Further, the central seat 12 provided between the both side seats 11 of the front seat 10 has a seat cushion 17 and a seat back 18, and is independent by a slide mechanism 19 provided on the lower side of the seat cushion 17. It can slide back and forth.

  Here, the range of the front and rear slide by the slide mechanism 19 of the central seat 12 is shifted rearward with respect to the slide range of the side seat 11 by the slide mechanism 15, and as shown by the solid line in FIG. Further, a V-shaped layout in which the center sheet 12 is shifted to the rear side and a linear layout in which the side sheets 11 and the center sheet 12 on both sides are aligned in the front-rear direction as shown by a two-dot chain line in FIG. Yes.

  The pair of left and right side seats 21 of the rear seat 20 have a seat cushion 23 and a seat back 24, respectively, and are fixed in position, that is, not slidable back and forth in a seatable state where a passenger can sit. Further, the central seat 22 provided between the both side seats 21 of the rear seat 20 has a seat cushion 27 and a seat back 28, and is independently provided by a slide mechanism 29 provided on the lower side of the seat cushion 27. It can slide back and forth.

  Here, the center sheet 22 extends from the side sheet 21 whose position is slid forward and backward by the slide mechanism 29 to the rear side, and the center sheet 22 is more than the pair of side sheets 21 as shown by the solid line in FIG. 1 and a linear layout in which the side sheets 21 and the center sheet 22 on both sides are aligned in the front-rear direction as shown by a two-dot chain line in FIG.

  As shown in the seatable state in FIGS. 2 and 3 and the dive-down storage state in FIG. 4, the seat cushion 23 is moved forward in conjunction with the forward movement of the seat back 24. The dive down storage which sinks below while moving to is made possible. The lower ends of the respective seat backs 24 of the side seats 21 are connected to the front end portions of the side extension portions 32 of the floor mat 31 on the cargo compartment side.

  The center seat 22 of the rear seat 20 can slide back and forth between the slide front end position in the seatable state shown in FIG. 2 to the slide rear end position in the seatable state shown in FIG. 3, and can be seated in FIG. As shown in the slide front end position in the state and the dive-down storage state in FIG. 4, the seat back 28 is moved forward from the slide front end position, and the seat cushion 27 moves forward and sinks downward while moving forward. Down storage is possible.

  Here, since the center seat 22 is slidable in the front-rear direction, the floor mat 31 on the cargo compartment side is formed with an opening 33 for allowing sliding between the both side extension portions 32. A plate-like center floor lid 35 for closing the opening 33 is slidably coupled to the central seat 22.

  Next, the center seat 22 slidable back and forth of the rear seat 20 and dive-down retractable will be further described.

  As shown in FIG. 5, the center seat 22 of the rear seat 20 is provided at a step portion of a step-like vehicle body floor 38 in which a higher floor 37 higher than the lower floor 36 is formed on the rear side of the lower floor 36. Yes.

  The seat back 28 of the center seat 22 has a seat back pad 45 that has cushioning properties and supports the back of the occupant, and a seat back frame 46 that holds the seat back pad 45. The seat cushion 27 of the central seat 22 includes a seat cushion pad 48 that has cushioning properties and supports the occupant's buttocks, and a seat cushion frame 49 that holds the seat cushion pad 48.

  A pair of seat slide rails 51 extending in the longitudinal direction of the vehicle body are provided on the high floor 37 so as to be separated from each other in the left-right direction. The seat slide rails 51 hold the sliders 52 so as to be slidable only in the longitudinal direction. ing. The seat slide rail 51 and the slider 52 constitute a slide mechanism 29.

  The seat back frame 46 is supported by a slider 52 via a rotation shaft 54 having a central axis disposed in the left-right direction at one end side thereof. It can be tilted. As a result, the seat back 28 is pivotally supported by the slider 52 that is guided and slid by the seat slide rail 51 so as to tilt forward.

  A support shaft 55 having a central axis disposed in the left-right direction is attached to a position that is a predetermined amount above the pivot shaft 54 of the seat back frame 46 in the standing state, and the seat cushion frame is attached to the support shaft 55. The rear part of 49 is rotatably supported. The seat cushion frame 49 has a schematic shape that extends downward from the support shaft 55 and then extends forward.

  A support member 56 is fixed to the front end of the seat cushion frame 49, and one end of a link arm 58 is rotatably connected to the support member 56 via a rotation shaft 57 having a central axis line in the left-right direction. ing. The other end side of the link arm 58 is rotatably supported by a floor side support member 59 provided on the lower floor 36. Thereby, the front portion of the seat cushion frame 49 is linked to the lower floor 36.

  When such a central seat 22 is in a seatable state in which a normal occupant can be seated, the slider 52 slides along the seat slide rail 51 if necessary. Thus, the seat slide rail 51 can be fixed and released at a plurality of positions.

  Then, for example, as shown in FIGS. 3 and 6, the slider 52 moves from a state where the slider 52 is located at the rear end position of the slide range to a state where it is located at the front end position of the slide range as shown in FIGS. 2 and 5. , The seat back 28 fixed to the slider 52 slides as it is, while the seat cushion 27 rotatably connected to the support shaft 55 of the seat back 28 is provided at the front portion. The link arm 58 that is pivotally connected to the pivot shaft 57 is pivoted about the floor-side support member 59, so that the front part is slid while moving up and down to draw a slightly arcuate locus. . When sliding backward, the reverse operation is performed.

  Further, when the dive down is stored, if the seat 52 is pivoted about the pivot shaft 54 with the slider 52 positioned at the front end position of the slide range shown in FIGS. The support shaft 55 located above the rotation shaft 54 in the back 28 moves to the front side and the lower side. As a result, the seat cushion frame 49 is connected to the support shaft 55 as shown in FIG. The rear side of the front side moves to the front side and the lower side, and the link arm 58 rotatably connected to the front rotation shaft 57 tilts forward about the floor side support member 59, so that the front side is also front side As a result, the seat cushion pad 48 is moved to the front side and the lower side as a whole, and the seat cushion pad 48 to be held is moved to the front side and the lower side and dropped to the lower floor 36 side. At this time, the seat back 28 overlaps with the seat cushion 27 as shown in FIG.

  In order to allow the movement of the seat cushion 27 during dive down storage as described above, the vehicle body floor 38 is inclined between the lower floor 36 and the higher floor 37 so as to become lower toward the front side and connect these. 62 is provided.

  In the present embodiment, the fuel tank 63 is disposed below the rear seat 20 and below the inclined floor 62 and the higher floor 37 of the vehicle body floor 38. For this reason, the fuel tank 63 has an upper surface portion 64 along the lower surface of the high floor 37 and an inclined surface portion 65 that is inclined so as to be positioned on the lower side as a whole along the lower surface (rear surface) of the inclined floor 62. is doing.

  As shown in FIG. 8, a vehicle body skeleton portion (front vehicle skeleton portion) 67 having a closed cross-sectional structure extending in the vehicle width direction (left-right direction) is disposed on the vehicle body floor 38 at a position in front of the fuel tank 63. A vehicle body skeleton portion (rear vehicle body skeleton portion) 68 having a closed cross-sectional structure extending in the vehicle width direction is also disposed at a rear position of the fuel tank 63.

  The vehicle body skeleton part 67 is a pair of lower plate part 70 and a standing plate part 71 that is bent upward from both front and rear edge portions of the lower plate part 70 and a pair that is bent in the front-rear direction from the upper end edge part of each standing plate part 71. A mid-floor cross member 73 made of a steel plate having a hat-shaped cross section having a plurality of flange portions 72 and the flange portion 72 are joined by welding so as to connect the flange portions 72 to a predetermined intermediate range in the vehicle width direction of the mid-floor cross member 73. It has a cross member stiffener 74 made of a steel plate. When the flange portion 72 and the cross member stiffener 74 of the mid floor cross member 73 are joined to the lower surface of the floor panel 76 made of a steel plate of the vehicle body floor 38 by welding, the mid floor cross member 73, the cross member stiffener 74 and the floor A vehicle body skeleton 67 is formed by the panel 76.

  As shown in FIG. 9, the vehicle body skeleton portion 68 includes a front plate portion 77, a standing plate portion 78 that bends downward from both front and rear edge portions of the upper plate portion 77, and front and rear portions from the lower end edge portion of each standing plate portion 78. It has the upper cross member 80 which consists of a steel plate which makes a hat-shaped cross-sectional shape which has a pair of flange part 79 bent opposite to a direction.

  Further, the vehicle body skeleton 68 is bent in the front-rear direction from the lower plate 81, the upright plate 82 bent upward from both front and rear edge portions of the lower plate 81, and the upper end edge of each vertical plate 82. And a lower cross member 84 made of a steel plate having a hat-shaped cross-sectional shape having a pair of flange portions 83.

  Then, the upper cross member 80 is joined to the upper surface of the floor panel 76 at each flange portion 79 by welding, and the lower cross member 84 is sandwiched between each flange portion 79 at each flange portion 83 and the floor panel 76 is sandwiched. When joined to the lower surface by welding, the upper cross member 80, the floor panel 76, and the lower cross member 84 form a vehicle body frame portion 68.

  Further, as shown in FIG. 8, the vehicle body floor 38 has a pair of vehicle body frame portions (side vehicle body frame portions) 85 having a closed cross-sectional structure extending in the vehicle body front-rear direction at positions on the left and right sides of the fuel tank 63. It is arranged.

  The vehicle body skeleton portion 85 has a pair of side plate portions 87 that are bent upward from both edge portions in the vehicle width direction of the lower plate portion 86 and the lower plate portion 86 and an upper end edge portion of these side plate portions 87 that are opposed to each other in the vehicle width direction. A rear floor frame 89 made of a steel plate having a hat-shaped cross-sectional shape having a pair of flange portions 88 bent in a bent manner, and a steel plate joined by welding so as to connect the flange portions 88 to a predetermined intermediate range in the front-rear direction of the rear floor frame 89 And a frame stiffener 90 made of When the flange portion 88 and the frame stiffener 90 of the rear floor frame 89 are joined to the lower surface of the floor panel 76 of the vehicle body floor 38 by welding, a vehicle body skeleton portion 85 is formed by the rear floor frame 89, the frame stiffener 90 and the floor panel 76. Is done.

  Here, the vehicle body skeleton part 67 and the vehicle body skeleton part 68 along the vehicle width direction are connected to a pair of vehicle body skeleton parts 85 along the vehicle body longitudinal direction, thereby forming a frame shape and a fuel tank. 63 is enclosed in four horizontal directions. Further, since the vehicle body skeleton portion 67 is provided on the lower floor 36 and the vehicle body skeleton portion 68 is provided on the higher floor 37, the vehicle body skeleton portion 68 is disposed on the upper side of the vehicle body skeleton portion 67.

  In the present embodiment, the vehicle body floor 38 includes a sheet stiffener (cover member) 91 made of a plurality of, specifically two, steel plates extending obliquely along the inclined floor 62 from a plurality of locations on the center side of the vehicle body skeleton 67. Is provided.

  As shown in FIG. 10, each seat stiffener 91 includes an inclined plate portion 92 that extends in the middle of the vehicle width direction and extends obliquely along the inclined floor 62, and a rear end edge portion of the inclined plate portion 92. A rear extension plate portion 93 that is bent so as to extend rearward, an inclined plate portion 92 and an annular plate portion 94 that is bent upward from the peripheral edge of the rear extension plate portion 93, and an inclined plate portion of the annular plate portion 94. 92 and an annular flange portion 95 that is bent outward from the peripheral edge opposite to the rear extension plate portion 93, and the inclination of the floor panel 76 of the vehicle body floor 38 at the flange portion 95. A closed cross-section structure is formed by joining to the lower surface of the portion forming the floor 62 and the lower surface of the portion forming the higher floor 37 by welding. Here, each seat stiffener 91 is coupled to the flange portion 72 at the rear of the vehicle body skeleton 67 extending in the vehicle width direction in front of each, and as a result, each of them is inclined rearwardly upward from the vehicle skeleton 67. The vehicle body skeleton 96 that extends in this manner is constituted by the floor panel 76. The vehicle body frame portion 96 is disposed along the inclined surface portion 65 above the front portion of the fuel tank 63.

  Here, as shown in FIG. 11, each sheet stiffener 91 has a sheet plate 98 made of a steel plate disposed so as to connect the flange portion 95 in the vehicle width direction within a predetermined intermediate range in the front-rear direction. The flange portion 95 is joined by welding. Each seat plate 98 is joined to the lower surface of the floor panel 76 by welding together with the flange portion 95 of the seat stiffener 91 as shown in FIG.

  Further, as shown in FIGS. 8 and 11, the rear portion of the seat stiffener 91 is made of a steel plate so that the flange portion 95 is connected in the vehicle width direction and the sheet stiffeners 91 adjacent in the vehicle width direction are connected to each other. The sheet patch 100 is joined by welding. This seat patch 100 is also joined to the lower surface of the floor panel 76 by welding together with the flange portion 95 of the sheet stiffener 91 as shown in FIG. Therefore, the above-described vehicle body frame portion 96 is configured by the seat stiffener 91, the seat plate 98, and the floor panel 76 at the position of the seat plate 98, and at the position of the seat patch 100, the seat stiffener 91, the seat patch 100, and the floor. And a panel 76.

  The seat patch 100 includes an inclined plate portion 101 joined to an edge of the floor panel 76 that constitutes the inclined floor 62 on the high floor 37 side, and a portion of the floor panel 76 that constitutes the high floor 37. It has a bent shape having an upper plate portion 102 joined to the side edge portion. The seat patch 100 is joined to the floor panel 76 to form a floor reinforcing portion 103 that reinforces the vehicle body floor 38 by increasing the thickness at the bent portion of the floor panel 76.

  As shown in FIG. 8, the vehicle body skeleton portion 67 having a closed cross-section structure, a pair of left and right vehicle body skeleton portions 96 extending from the vehicle body skeleton portion 67, and the vehicle body skeleton portions 96 opposite to the vehicle body skeleton portion 67. A frame-shaped floor reinforcing portion 105 that is connected in a frame shape along the vehicle body floor 38 and reinforces the vehicle body floor 38 is configured by the floor reinforcing portion 103 including the seat patch 100 that connects the two.

  Therefore, the vehicle body skeleton portion 96 including the seat stiffener 91 is connected to the vehicle body floor 38 in a frame shape, thereby constituting a part of the frame-like floor reinforcement portion 105 that reinforces the vehicle body floor 38. The vehicle body skeleton part 67 extending in the vehicle width direction in front of the stiffener 91 also constitutes a part of the frame-like floor reinforcing part 105.

  The frame-like floor reinforcing portion 105 is disposed on the inclined floor 62 of the vehicle body floor 38 facing the inclined surface portion 65 of the fuel tank 63, and is a highly rigid vehicle body at a position that does not overlap the fuel tank 63 in plan view. A pair of vehicle body skeleton parts 96 whose thickness is suppressed so as to overlap with the fuel tank 63 in plan view are extended from the skeleton part 67, and the thickness of the part overlapping with the fuel tank 63 in plan view on the tip side is further suppressed. By connecting with the floor reinforcing part 103, the capacity reduction of the fuel tank 63 is suppressed while the rigidity of the vehicle body floor 38 is secured.

  As shown in FIG. 11, two mounting holes 107 are formed in each seat plate 98 on the left and right sides at positions inside the annular plate portion 94 of the seat stiffener 91 to be attached. As shown in FIGS. 10 and 12, a weld nut 108 is fixed on the lower surface so as to be coaxial with each mounting hole 107. The left and right floor-side support members 59 that support the left and right link arms 58 for diving down the central seat 22 of the rear seat 20 are respectively provided in two mounting holes 110 on the left and right sides formed in the mounting portion 109. Are inserted into two left and right mounting holes 111 formed on the floor panel 76 and coaxially with each mounting hole 107 of the seat plate 98 and two left and right mounting holes 107 of each seat plate 98. It is fixed to the vehicle body floor 38 side by two component mounting bolts 112 screwed into the weld nut 108. At this time, the seat stiffener 91 covers the projecting portion 113 projecting from the vehicle body floor 38 of the component mounting bolt 112 at the front in the axial direction.

  Here, as shown in FIG. 10, the component mounting bolts 112 penetrating through the mounting holes 111 of the floor panel 76 of the vehicle body floor 38 are disposed above the fuel tank 63 on the vehicle body floor 38. As a result, the floor The seat stiffener 91 fixed to the lower surface of the panel 76 is interposed between the fuel tank 63 and the projecting portion 113 projecting from the vehicle body floor 38 of the component mounting bolt 112.

  As shown in FIGS. 10 and 12, the inclined plate portion 92 that inclines backward from the seat stiffener 91 faces the inclined surface portion 65 of the fuel tank 63, and each inclined plate of the inclined surface portion 65 of the fuel tank 63. Cushion mounting surface portions 114 are formed in portions facing the portion 92, respectively.

  Further, as shown in FIG. 10, the rear extension plate portion 93 extending rearward from the rear end of the inclined plate portion 92 of each seat stiffener 91 faces the upper surface portion 64 of the fuel tank 63, and the fuel Cushion mounting surface portions 115 are also formed on portions of the upper surface portion 64 of the tank 63 facing the respective rearward extending plate portions 93.

  In the fuel tank 63, a cushion member 116 made of rubber or the like is joined to the cushion mounting surface portions 114 and 115, and the cushion member 116 is brought into contact with the inclined plate portion 92 and the rear extension plate portion 93. It is joined to the car body side. Therefore, the surface on the fuel tank 63 side of the inclined plate portion 92 is the contact surface 117 of the fuel tank 63, and the surface on the fuel tank 63 side of the rear extension plate portion 93 is also the contact surface 118 of the fuel tank 63. Yes.

  Then, as shown in FIG. 8, the left and right seat slides of the central seat 22 of the rear seat 20 so as to connect the seat patch 100 constituting the vehicle body frame portion 96 and the vehicle body frame portion 68 with the left and right seat stiffeners 91 described above. Rails 51 are provided. Here, the seat slide rail 51 is connected in series in the vehicle longitudinal direction with the vehicle body frame portion 96 aligned with the vehicle width direction. The seat slide rail 119 of the central seat 22 of the front seat 10 is also aligned with the vehicle body frame portion 96 in the vehicle width direction, and is connected in series in the vehicle longitudinal direction via the vehicle body frame portion 67.

  As shown in FIGS. 11 and 13, the inclined plate portion 101 of the seat patch 100 is formed with mounting holes 120 at positions inside the respective annular plate portions 94 of the respective seat stiffeners 91 in the vehicle width direction. As shown in FIGS. 10 and 13, weld nuts 121 are fixed to the lower surface of the inclined plate portion 101 of the seat patch 100 so as to be coaxial with the mounting holes 120, respectively. Each of the seat slide rails 51 described above has a mounting hole 124 formed in the floor panel 76 and a seat coaxial with the mounting hole 123 formed in the mounting portion 122 at the front end and the mounting hole 120 in the seat patch 100, respectively. It is fixed to the vehicle body floor 38 side by a component mounting bolt 125 that is inserted into the mounting hole 120 of the patch 100 and screwed into the weld nut 121. At this time, each seat stiffener 91 covers the protruding portion 126 protruding from the vehicle body floor 38 of each component mounting bolt 125 with its axial direction front.

  Here, as shown in FIG. 10, these component mounting bolts 125 are also disposed above the fuel tank 63 on the vehicle body floor 38 as described above, and as a result, are fixed to the lower surface of the floor panel 76. Each seat stiffener 91 is interposed between the fuel tank 63 and the projecting portion 126 projecting from the vehicle body floor 38 of these component mounting bolts 125.

  Further, as shown in FIG. 14, a mounting hole 129 is formed in the front flange portion 79 of the upper cross member 80 of the vehicle body skeleton portion 68, and the seat slide rail 51 of the central seat 22 of the rear seat 20 is thereafter An attachment hole 132 is formed in the attachment portion 131 at the end, and a weld nut 130 is fixed to the upper surface of the attachment portion 131 so as to be coaxial with the attachment hole 132. Then, the seat slide rail 51 of the central seat 22 of the rear seat 20 is coaxial with the mounting hole 129 of the flange portion 79 from the lower side of the floor panel 76 and the mounting hole 133 and the flange portion 79 formed in the floor panel 76. Are fixed to the vehicle body floor 38 side by mounting bolts 134 inserted into the mounting holes 129 and the mounting holes 132 formed in the mounting portion 131 and screwed into the weld nut 130. At this time, the mounting bolt 134 is displaced in the front-rear direction with respect to the fuel tank 63.

  As shown in FIG. 8, a maintenance hole 137 is formed at a position between the left and right seat slide rails 51 in which a pump (not shown) that requires maintenance of the fuel tank 63 is disposed. Further, the outer portion of the maintenance hole 137 between the left and right seat slide rails 51 of the fuel tank 63 and the bulk upper portion 138 having a height higher than that of the seat slide rail 51 as shown in FIGS. The capacity of the fuel tank 63 is increased,

  As shown in FIG. 8, the vehicle body skeleton part 96 and the vehicle body skeleton part 68 are respectively connected to the left and right outer sides of the seat slide rail 51 on the same side in the vehicle width direction. A pair of connecting members 140 to be connected to the vehicle body skeleton 85 is provided.

  As shown in FIG. 15, the connecting member 140 includes a pipe (closed cross-section structure portion) 142 made of a steel pipe having both ends closed in a plate shape and formed as an attachment portion 141, a lower plate portion 144, A hat-shaped cross-sectional shape having a pair of upright plate portions 145 bent upward from both edge portions in the width direction of the lower plate portion 144 and a pair of flange portions 146 bent in opposite directions from upper end edge portions of the upright plate portions 145. A lower divided body 147 made of a steel plate, a pair of standing plate portions 150 bent downward from both edge portions in the width direction of the upper plate portion 149 and the upper plate portion 149, and a lower end edge portion of each standing plate portion 150, respectively. And an upper divided body 152 made of a steel plate having a hat-shaped cross section having a pair of flange portions 151 bent in the opposite directions.

  The lower divided body 147 and the upper divided body 152 form a closed cross-section structure portion 153 by joining the corresponding flange portions 146 and 151 by welding. And this closed cross-section structure part 153 is joined to the intermediate part of the pipe 142 at one end part in the length direction by welding so as to close its one end opening and to be perpendicular to the pipe 142.

  Then, as shown in FIG. 8, the attachment member at the front end of the pipe 142 in the state where the right connecting member 140 arranges the pipe 142 in the front-rear direction and extends the closed cross-section structure portion 153 from the pipe 142 in the right direction. 141 is connected to the right side of the seat patch 100, the attachment portion 141 at the rear end of the pipe 142 is connected to the right side of the upper plate portion 77 of the vehicle body skeleton portion 68, and the extended distal end side of the closed cross-section structure portion 153 is connected to the right side. The frame stiffener 90 of the vehicle body skeleton 85 is connected.

  The connecting member 140 on the left side connects the attachment portion 141 at the front end of the pipe 142 to the left side of the seat patch 100 in a state where the pipe 142 is disposed in the front-rear direction and the closed cross-section structure portion 153 is extended leftward from the pipe 142. Then, the attachment portion 141 at the rear end of the pipe 142 is connected to the left side of the upper plate portion 77 of the vehicle body skeleton portion 68, and the extended front end side of the closed cross-section structure portion 153 is connected to the frame stiffener 90 of the vehicle body skeleton portion 85 on the left side. It is connected.

  That is, as shown in FIG. 11, attachment holes 156 are formed on the outer side in the vehicle width direction of the respective sheet stiffeners 91 of the inclined plate portion 101 of the seat patch 100. As shown in FIG. A weld nut 157 is fixed to the lower surface of the inclined plate portion 101 so as to be coaxial with the mounting hole 156. The mounting portion 141 at the front end of the pipe 142 is coaxial with the mounting hole 158 formed in the pipe 142 and the mounting hole 156 in the seat patch 100, and the mounting hole 159 formed in the floor panel 76 and the mounting hole in the seat patch 100. It is fixed to the vehicle body floor 38 side with a mounting bolt 160 that is inserted into 156 and screwed into the weld nut 157. At this time, the portion of the mounting bolt 160 protruding from the vehicle body floor 38 is relatively far away from the fuel tank 63.

  An attachment hole 163 is formed in the upper plate portion 77 of the vehicle body skeleton portion 68, and a weld nut 164 is fixed to the lower surface of the upper plate portion 77 so as to be coaxial with the attachment hole 163. Then, the mounting portion 141 at the rear end of the pipe 142 is inserted into the mounting hole 158 formed in the pipe 142 and the mounting hole 163 of the upper plate portion 77, and is fixed to the vehicle body floor 38 by the mounting bolt 166 screwed into the weld nut 164. Fixed to the side.

  Further, as shown in FIG. 17, a mounting hole 168 is formed on the inner side in the vehicle width direction of the frame stiffener 90 at a position between the both side plate portions 87 of the rear floor frame 89, and is attached to the lower surface of the frame stiffener 90. A weld nut 170 is fixed coaxially with the hole 168. The lower plate portion 144 of the closed cross-section structure portion 153 is coaxial with the mounting hole 171 and the mounting hole 168 of the frame stiffener 90, and the mounting hole 172 and the frame stiffener 90 of the floor panel 76 are coaxial. The mounting bolt 173 is inserted into the mounting hole 168 and screwed into the weld nut 170 and is fixed to the vehicle body floor 38 side. The upper plate portion 149 of the closed cross-section structure portion 153 is formed with an insertion hole 174 that is coaxial with the mounting hole 171 of the lower plate portion 144 and into which a tool or the like (not shown) is inserted.

  Then, the side seats 21 of the rear seat 20 are fixed to the closed cross-section structure portions 153 along the vehicle width direction of the respective connecting members 140 attached to the vehicle body floor 38 in this way. That is, as shown in FIG. 15, the upper plate portion 149 of the closed cross-section structure portion 153 has mounting holes 177 formed at two left and right portions, and the lower surface of the upper plate portion 149 is coaxial with each mounting hole 177. A weld nut 178 shown in FIG. 18 is fixed. Then, the lower mounting portion 179 of the side seat 21 is inserted into the mounting hole 180 formed in the side seat 21 and the mounting hole 177 of the upper plate portion 149 and is connected to the connecting member by the mounting bolt 182 screwed into the weld nut 178. 140 is fixed.

  Further, as shown in FIG. 15, a mounting hole 189 is formed in the upper plate portion 149 of the closed section structure portion 153 of the connecting member 140 in the vicinity of the pipe 142, and the anchor plate 185 and the anchor bolt shown in FIG. A seat belt anchor 187 composed of 186 is fastened to the mounting hole 189. That is, a weld nut 190 is fixed to the lower surface of the upper plate portion 149 of the closed cross-section structure portion 153 so as to be coaxial with the attachment hole 189, and the anchor plate 185 is formed with the attachment hole 191 formed on the upper plate portion 149. 149 is fixed to the vehicle body floor 38 side with an anchor bolt 186 inserted into the mounting hole 189 and screwed into the weld nut 190. The seat belt 193 is supported by the anchor plate 185 of the seat belt anchor 187.

  According to the present embodiment described above, between the fuel tank 63 and the projecting portions 113 and 126 projecting from the vehicle body floor 38 of the component mounting bolts 112 and 125 passing through the vehicle body floor 38 at a position above the fuel tank 63. Since the intervening seat stiffener 91 is fixed to the lower surface of the vehicle body floor 38, the fuel tank 63 and the component mounting bolts 112, 125 at the time of a vehicle collision or the like can be formed even when the fuel tank 63 is extended to the component mounting bolts 112, 125 side. Interference with the protrusions 113 and 126 can be prevented by the sheet stiffener 91. In addition, since the seat stiffener 91 is provided with the contact surfaces 117 and 118 of the fuel tank 63, the seat stiffener 91 can be used as a reference for mounting the fuel tank 63, and allowance for variations in the shape and the like of the fuel tank 63. The fuel tank 63 can be extended to the component mounting bolts 112 and 125 side without any problem. Therefore, the space limitation of the fuel tank 63 can be eliminated as much as possible, and the tank capacity can be secured. In addition, the seat stiffener 91 covering the component mounting bolts 112 and 125 and the member provided with the contact surfaces 117 and 118 of the fuel tank 63 can be used together, and the cost can be reduced.

  Further, since the seat stiffener 91 has a closed cross-sectional structure with the floor panel 76 of the vehicle body floor 38, the vehicle body strength can be improved, and the fuel tank 63 abutting against the contact surfaces 117, 118 of the seat stiffener 91 can be stably provided. Can be supported.

  Further, since the seat stiffener 91 is coupled to the vehicle body skeleton portion 67 extending in the vehicle width direction in front of the seat stiffener 91, the seat stiffener 91 protrudes from the vehicle body skeleton portion 67 extending in the vehicle width direction. In addition, the fuel tank 63 in contact with the contact surfaces 117 and 118 of the seat stiffener 91 can be supported more stably. In addition, when the vehicle body frame | skeleton part extended in a vehicle width direction is provided behind the seat stiffener 91, even if it connects the seat stiffener 91 to this, the same effect is acquired.

  In addition, since the seat stiffener 91 and the vehicle body frame portion 67 are connected in a frame shape along the vehicle body floor 38 to constitute a part of the frame-like floor reinforcing portion 105 that reinforces the vehicle body floor 38, the seat stiffener 91 is formed. Can be effectively used as a part of the frame-shaped floor reinforcing portion 105.

In addition, as shown in FIG. 20, when the maintenance hole 195 in which the pump etc. which require the maintenance of the fuel tank 63 is arrange | positioned under the above-mentioned connection member 140 is formed, the connection member 140 is as above. Since the thin pipe 142 is provided, a gap for work can be secured satisfactorily.
Further, a vehicle body skeleton portion having a closed cross section may be arranged instead of the floor reinforcing portion 103 described above.

1 is a plan view schematically showing the interior of a vehicle to which a vehicle body structure according to an embodiment of the present invention is applied. 1 is a perspective view illustrating a state in which a rear seat in a vehicle to which a vehicle body structure according to an embodiment of the present invention is applied has a linear layout. 1 is a perspective view showing a state in which a rear seat in a vehicle to which a vehicle body structure of an embodiment of the present invention is applied has a V-shaped layout. 1 is a perspective view showing a state in which a rear seat in a vehicle to which a vehicle body structure of an embodiment of the present invention is applied is stored in a dive down manner. It is a side view showing the state where the center seat of the rear seat in the vehicle to which the vehicle body structure of one embodiment of the present invention is applied is in the front end position. It is a side view showing the state where the center seat of the rear seat in the vehicle to which the vehicle body structure of one embodiment of the present invention is applied is in the rear end position. It is a side view which shows the dive down accommodation state of the center seat of the rear seat in the vehicle to which the vehicle body structure of one embodiment of the present invention is applied. It is a perspective view which shows the vehicle body structure of one Embodiment of this invention. It is sectional drawing which shows the vehicle body frame | skeleton part of the rear part in the vehicle body structure of one Embodiment of this invention. It is sectional drawing of the sheet stiffener periphery in the vehicle body structure of one Embodiment of this invention. It is a perspective view of the assembly state of the seat stiffener, the seat plate, and the seat patch in the vehicle body structure of one embodiment of the present invention. It is sectional drawing which shows the attachment to the floor panel of the seat stiffener and seat plate in the vehicle body structure of one Embodiment of this invention. It is sectional drawing which shows the attachment to the floor panel of the seat stiffener and seat patch in the vehicle body structure of one Embodiment of this invention. It is sectional drawing which shows the attachment to the vehicle body frame | skeleton part of the seat slide rail in the vehicle body structure of one Embodiment of this invention. It is a perspective view which shows the connection member in the vehicle body structure of one Embodiment of this invention. It is sectional drawing which shows the attachment to the vehicle body side of the pipe of the connection member in the vehicle body structure of one Embodiment of this invention. It is sectional drawing which shows the attachment to the vehicle body side of the closed cross-section structure part of the connection member in the vehicle body structure of one Embodiment of this invention. It is sectional drawing which shows attachment of the side part sheet | seat to the closed cross-section structure part of the connection member in the vehicle body structure of one Embodiment of this invention. It is sectional drawing which shows attachment of the seatbelt anchor to the closed cross-section structure part of the connection member in the vehicle body structure of one Embodiment of this invention. It is a top view which shows the example of attachment to the four-wheel drive vehicle of the connection member in the vehicle body structure of one Embodiment of this invention.

Explanation of symbols

38 Car body floor 63 Fuel tank 91 Seat stiffener (cover member)
96 Car body frame part 105 Frame-like floor reinforcement part 112,125 Component mounting bolt 113,126 Projection part 117,118 Contact surface

Claims (3)

A vehicle body structure in which a fuel tank is disposed below the vehicle body floor, and a part mounting bolt that penetrates the vehicle body floor is disposed above the fuel tank in the vehicle body floor,
A cover member interposed between the fuel tank and a projecting portion that protrudes from the vehicle body floor of the component mounting bolt is fixed to the lower surface of the vehicle body floor, and a contact surface of the fuel tank is provided on the cover member .
The cover member includes a bottom plate portion including an inclined plate portion extending obliquely along the inclined floor, an annular plate portion bent upward from a peripheral portion of the bottom plate portion, and outward from the peripheral portion of the annular plate portion. A hat-shaped cross-sectional shape having an annular flange portion that bends, and is welded to the lower surface of a portion of the floor panel of the vehicle body floor that forms the inclined floor at the flange portion, and is closed by the portion. Forming the structure,
A plate is joined to the flange portion so as to connect both side portions of the flange portion in the vehicle width direction,
The plate has a mounting hole into which the component mounting bolt is inserted at a position inside the annular plate portion of the cover member. The mounting hole is coaxial with the mounting hole, and the component mounting bolt is A vehicle body structure characterized in that a weld nut to be screwed is fixed . Body structure according to claim 1, characterized in that by combining the cover member to the vehicle body frame extending before or later the vehicle widthwise direction of the cover member. 3. The vehicle body according to claim 2, wherein the cover member and the vehicle body frame portion constitute a part of a frame-like floor reinforcing portion that reinforces the vehicle body floor by being connected in a frame shape along the vehicle body floor. Construction.

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