JP5002624B2 - Body structure with sliding door - Google Patents

Description

  The present invention relates to a vehicle body structure with a sliding door in which a side sill is provided outside a vehicle body of a cross member and a floor frame.

  In the body structure with a sliding door, a reinforcing gusset with a substantially U-shaped cross section is provided on the inner side of the side sill in the vehicle width direction, and the reinforcing gusset extends from the front cross member to the rear cross member along the longitudinal direction of the side sill. It is known that a gusset opening is closed with a side sill to form a closed cross section, and a seat rail (hereinafter referred to as “seat support leg”) is attached to the closed cross section (see, for example, Patent Document 1). .)

It is possible to secure the rigidity of the side sill by extending the reinforcing gusset having a substantially U-shaped cross section from the front cross member to the rear cross member along the longitudinal direction of the side sill, and forming the closed cross section with the reinforcing gusset and the side sill. .
And a seat support leg part is firmly attached by attaching a seat support leg part to a side sill which secured rigidity.

JP 2008-13129 A

However, in the side sill structure of Patent Document 1, in order to ensure the rigidity of the side sill, the reinforcing gusset extends from the front cross member to the rear cross member along the longitudinal direction of the side sill.
For this reason, it is necessary to form the reinforcing gusset in a large shape, which has been an obstacle to reducing the weight of the vehicle body.
Further, since the reinforcing gussets are individually provided, the number of parts is increased, and a process of assembling the reinforcing gussets to the side sill is required, which hinders the assembly man-hours from being reduced.

  It is an object of the present invention to provide a vehicle body structure with a sliding door that can secure the rigidity of the side sill, suppress an increase in the weight of the vehicle body, and reduce the number of assembly steps.

  According to the first aspect of the present invention, the floor frame extends in the vehicle body longitudinal direction, the cross member extends in the vehicle width direction so as to intersect the floor frame, and the cross member and the floor In a vehicle body structure with a sliding door, a side sill having a closed cross section extends along the floor frame outside the vehicle body of the frame, and a guide storage portion for storing a guide member of the sliding door is provided in the side sill having a closed cross section. The side sill includes a sill inflating portion that is inflated toward the passenger compartment side, and the sill inflating portion is provided on a front portion joined to the floor frame and on the vehicle body rear side of the front portion. It has a center part joined to the member, and a rear part provided on the vehicle body rear side of the center part and joined to the guide storage part.

  According to a second aspect of the present invention, a reinforcing member is provided in the sill inflating portion, a central portion of the sill inflating portion is sandwiched between the reinforcing member and the cross member, and a sheet is provided on the reinforcing member. .

  According to a third aspect of the present invention, a door stopper portion capable of preventing the sliding door from being opened in an open state of the fuel filler opening is provided in the vicinity of the reinforcing member, and the door stopper portion is a fastening member that penetrates the sill expansion portion. It is fastened to the guide storage part.

  According to a fourth aspect of the present invention, the joint portion where the guide storage portion and the rear portion are joined is in the vicinity of the reinforcing member.

  A fifth aspect of the present invention is characterized in that a joint portion where the floor frame and the front portion are joined is in the vicinity of the reinforcing member.

  According to a sixth aspect of the present invention, in the reinforcing member, a seat mounting portion to which the seat is attached is provided above the guide housing portion, and a welding bolt projects upward from the seat mounting portion, and the projected welding The seat is fastened using a nut to a bolt.

In the invention which concerns on Claim 1, the sill expansion part was provided in the side sill, and this sill expansion part was expanded toward the compartment side. And the front part of the sill expansion part was joined to the floor frame, the center part was joined to the cross member, and the rear part was joined to the guide storage part.
Thereby, the front part, the center part, and the rear part of the sill expansion part can be reinforced by the three members of the floor frame, the cross member, and the guide storage part, respectively, and the rigidity of the sill expansion part (that is, the side sill) can be ensured.

Furthermore, by securing the rigidity of the sill expansion part (side sill) with three members, the large-sized reinforcing gusset described in the prior art can be made unnecessary, and an increase in the weight of the vehicle body can be suppressed.
In addition, the number of parts can be reduced by eliminating the need for large-shaped reinforcing gussets. By reducing the number of parts, the process of assembling the reinforcing gusset to the side sill becomes unnecessary, and the assembling man-hour can be reduced.

In the invention which concerns on Claim 2, the reinforcement member was provided in the sill expansion part (side sill). And the center part of the said sill expansion part was clamped with the reinforcement member and the cross member, and the sheet | seat was provided in the reinforcement member.
Therefore, the load acting on the seat can be transmitted to the side sill or the reinforcing member. And the sheet | seat load which acted on the reinforcement member from the sheet | seat can be disperse | distributed to a cross member through a reinforcement member.
Thereby, it becomes possible to suppress the rigidity of the reinforcing member, it is not necessary to make the reinforcing member larger than necessary, and the reinforcing member can be made compact and lightweight.

Here, “the seat load acting on the side sill and the reinforcing member from the seat” will be described.
For example, when the vehicle collides while traveling forward, a forward inertial force that moves the seat toward the front of the vehicle body acts.
This forward inertial force becomes “a seat load acting on the side sill and the reinforcing member from the seat”.

On the other hand, among seats, there is a seat belt built-in type seat in which a seat belt system such as a retractor and an anchorage (member for supporting webbing) is built in the seat.
When the opponent vehicle collides during forward travel of a vehicle equipped with a seat belt built-in type seat, an upward inertia force that attempts to lift the occupant from the seat acts on the occupant.
This upward inertial force becomes “the seat load acting on the side sill and the reinforcing member from the seat”.

That is, as the “seat load”, a load that acts on the reinforcing member from the seat toward the front of the vehicle body and a load that acts on the reinforcing member from the seat upward can be considered.
As described above, the seat load acting on the side sill and the reinforcing member from the seat toward the front of the vehicle body and the seat load acting upward on the side sill and the reinforcing member from the seat are distributed to the side sill and the cross member via the reinforcing member. it can.

In the invention according to claim 3, the door stopper portion is provided in the vicinity of the reinforcing member, and the door stopper portion is fastened to the guide storage portion by the fastening member.
Therefore, the load which acted on the reinforcing member from the sheet can be distributed to the guide storage portion via the fastening member.
As a result, the rigidity of the reinforcing member can be further suppressed, and the reinforcing member can be further reduced in size and weight.

In the invention which concerns on Claim 4, the joining site | part of the guide storage part and the rear part was made into the vicinity of the reinforcement member. Therefore, the load that has acted on the reinforcing member from the seat can be distributed to the guide storage portion via the rear joint portion.
As a result, the rigidity of the reinforcing member can be further suppressed, and the reinforcing member can be further reduced in size and weight.

In the invention which concerns on Claim 5, the joining part of a floor frame and a front part was made into the vicinity of the reinforcement member. Therefore, the load which acted on the reinforcing member from the seat can be distributed to the floor frame via the joint portion in the front part.
As a result, the rigidity of the reinforcing member can be further suppressed, and the reinforcing member can be further reduced in size and weight.

In the invention which concerns on Claim 6, the sheet | seat attachment site | part which attaches a sheet | seat among the reinforcement members was provided above the guide accommodating part. Therefore, the sheet attachment portion of the reinforcing member can be provided in the vicinity of the guide storage portion.
Thereby, since the load which acted on the sheet | seat attachment site | part from the sheet | seat can be more efficiently disperse | distributed to a guide accommodating part, the compactness and weight reduction of a reinforcement member can be achieved further.

Moreover, the welding bolt was protruded upward from the seat attachment site, and the seat was fastened with the protruding welding bolt and nut.
Here, the welding bolt is a bolt used by providing a protrusion on the seating surface of the head and welding the protrusion to the reinforcing member.

Here, when fastening a sheet | seat with a bolt and a welding nut instead of a welding bolt and a nut, the thread part of a welding nut and a bolt protrudes below from the upper part of a side sill.
On the other hand, in Claim 6, only the head of a welding bolt protrudes below from the upper part of a side sill by fastening a sheet | seat with a welding bolt and a nut.
Therefore, by using the welding bolt and nut, the amount of protrusion from the upper portion of the side sill can be suppressed smaller than that of the bolt and welding nut.

Thereby, the height of the upper part of a side sill can be lowered | hung. A step for getting on and off is provided on the upper side of the side sill.
Thereby, in the state which maintained the height of the guide accommodating part, it becomes possible to restrain the step height for boarding / alighting low, and boarding / alighting property can be ensured.

It is a perspective view which shows the vehicle body structure with a sliding door which concerns on this invention. It is a disassembled perspective view which shows the vehicle body structure with a sliding door which concerns on this invention. It is a perspective view which shows the principal part of the vehicle body structure with a slide door which concerns on this invention. It is a perspective view which shows the state which decomposed | disassembled the sheet | seat and the door stopper part from the vehicle body structure with a sliding door of FIG. It is a disassembled perspective view which shows the vehicle body structure with a sliding door of FIG. FIG. 6 is a sectional view taken along line 6-6 of FIG. FIG. 7 is a sectional view taken along line 7-7 in FIG. 3. FIG. 8 is a sectional view taken along line 8-8 in FIG. 3. It is a top view which shows the vehicle body structure with a sliding door of FIG. It is a top view which shows the state which fractured | ruptured the left side sill from the vehicle body structure with a sliding door of FIG. It is a disassembled perspective view which shows the state which decomposed | disassembled the reinforcement member from the vehicle body structure with a slide door of FIG. It is a perspective view which shows the reinforcement member which concerns on this invention. FIG. 8 is an enlarged view of 13 parts in FIG. 7. FIG. 14 is a cross-sectional view taken along line 14-14 of FIG. 3. It is a figure explaining the example which supports the load which acts on the left side sill which concerns on this invention. It is a figure explaining the example which supports the load which acts on the left side sill which concerns on this invention with a guide storage part.

  The best mode for carrying out the present invention will be described below with reference to the accompanying drawings. Note that “front”, “rear”, “left”, and “right” indicate the direction viewed from the driver, the front side is Fr, the rear side is Rr, the left side is L, and the right side is R.

A vehicle body structure 10 with a sliding door according to an embodiment will be described.
As shown in FIGS. 1 to 2, the vehicle body structure 10 with a sliding door is a center pillar-less vehicle that does not include a center pillar.
The vehicle body structure 10 with a sliding door includes left and right front side frames 11 extending in the longitudinal direction of the vehicle body and left and right floors extending from the rear end portions 11a of the left and right front side frames 11 toward the rear of the vehicle body. A frame (floor frame) 12 and left and right side sills (side sills) 13 provided on the outer sides of the left and right floor frames 12 and extending in the longitudinal direction of the vehicle body are provided.

  In addition, the vehicle body structure 10 with a sliding door includes a rear cross member (cross member) 14 laid over the left and right side sills 13, and a left and right end portion 14a (right end portion 14a not shown) of the rear cross member 14. The left and right rear floor frames 15 extending rearward, the rear cross member 14, the left and right floor frames 12, the floor panels 16 mounted on the left and right rear floor frames 15, and the floor panels 16 are mounted. A front cross member 17 spanned between the left and right side sills 13 and a fuel tank 18 provided between the front cross member 17 and the rear cross member 14 are provided.

  Further, as shown in FIGS. 3 to 4, the vehicle body structure 10 with a sliding door includes a reinforcing member 21 provided in the left side sill 13, and a left front seat 22 (see FIG. 2) supported by the reinforcing member 21. The door guide means 23 provided in the left side sill 13, the slide door 25 (see FIG. 1) provided slidably along the door guide means 23, and the fuel lid 111 (see FIG. 1) are opened. , A door stopper portion 27 for preventing the sliding door 25 from being opened is provided.

The reinforcing member 21 is a reinforcing bracket that supports the left rear support leg 55 of the left front seat (seat) 22 shown in FIG.
The slide door 25 (see FIG. 1) is provided so as to be slidable in the longitudinal direction of the vehicle body along the door guide means 23.
The slide door 25 is supported to be openable and closable when the fuel lid 111 (see FIG. 1) is closed.
A door stopper 27 is provided behind the reinforcing member 21 on the vehicle body.
The reinforcing member 21 and the door stopper portion 27 will be described in detail later.

Returning to FIG. 2, the left and right front side frames 11 are provided at predetermined intervals in the vehicle width direction and extend in the longitudinal direction of the vehicle body.
The vicinity of the rear end portion 11 a of the left front side frame 11 and the front end portion 13 a of the left side sill 13 are connected by a left outrigger 34.
The vicinity of the rear end portion 11 a of the right front side frame 11 and the front end portion 13 a of the right side sill 13 are connected by a right outrigger 34.

The left and right floor frames 12 are provided at predetermined intervals in the vehicle width direction and extend in the vehicle body front-rear direction.
As shown in FIGS. 5 and 6, the left floor frame 12 has a bottom portion 36 and inner and outer side walls 37 raised from the inside and outside of the bottom portion 36.
A stiffener 38 is joined to the left floor frame 12.

The stiffener 38 has a stiffener bottom portion 38a, and a stiffener inner portion 38b and a stiffener outer portion 38b raised from the inside and outside of the stiffener bottom portion 38a.
A stiffener inner portion 38 b is provided at the upper end portion 37 a of the inner wall 37, and a stiffener outer portion 38 b is provided at the upper end portion 37 a of the outer wall 37.
The right floor frame 12 (see FIG. 2) is a member formed symmetrically with the left floor frame 12, and detailed description thereof is omitted.

The left and right floor frames 12 have rear end portions 12 a provided on the rear cross member 14.
As shown in FIGS. 5 and 7, the rear cross member 14 extends in the vehicle width direction so as to intersect the left and right floor frames 12, whereby the left and right side sills 13 (the right side sill 13 is shown in FIG. 2). See).

The rear cross member 14 includes a bottom 41, front and rear side walls 42 and 43 raised from the inside and outside of the bottom 41, a front flange 42 a bent from the upper side of the front side wall 42 to the vehicle body front side, and an upper side of the rear side wall 43. And a rear flange 43a bent toward the rear side of the vehicle body.
That is, the rear cross member 14 is formed in a so-called substantially hat shape so as to open upward at the bottom 41, the front and rear side walls 42 and 43, and the front and rear flanges 42a and 43a.

Further, the rear cross member 14 includes a projecting piece 41 a that projects outward in the vehicle width direction from the bottom 41, a left front flange 42 b that is bent from the left side of the front side wall 42 toward the front side of the vehicle body, and the vehicle body from the left side of the rear side wall 43. And a left rear flange 43b bent to the rear side.
The overhanging piece 41 a, the left front flange 42 b, and the left rear flange 43 b are joined to the left side sill 13.
The joining of the left front flange 42b and the left rear flange 43b to the left side sill 13 will be described in detail with reference to FIGS.

  The left and right rear floor frames 15 (see FIG. 2 for the right rear floor frame 15) are extended from the left and right end portions 14a (the right end portion 14a is not shown) of the rear cross member 14 toward the rear of the vehicle body. Frames 15 are provided at predetermined intervals in the vehicle width direction.

As shown in FIGS. 5 and 8, the left rear floor frame 15 includes a bottom portion 46, inner and outer side walls 47 raised from the inside and outside of the bottom portion 46, and an inner flange 47 a bent from the inner side wall 47 to the vehicle compartment side. The outer flange 47a is bent from the outer wall 47 to the outer side of the vehicle body.
The left rear floor frame 15 is formed in a so-called substantially hat-shaped cross section so as to open upward at the bottom 46, the inner and outer side walls 47, and the inner and outer flanges 47a.

  Returning to FIG. 2, the right rear floor frame 15 is a member formed symmetrically with the left rear floor frame 15, and detailed description thereof is omitted.

Floor panels 16 are placed on the left and right floor frames 12, the rear cross member 14, and the left and right rear floor frames 15.
A front cross member 17 is placed on the front end portion 16 a of the floor panel 16, and the front cross member 17 is bridged between the left and right side sills 13.
The front cross member 17 is provided in front of the rear cross member 14 in the vehicle body.

Left and right front support legs 51 of the left front seat 22 are attached to the front cross member 17 with welding bolts 52 and nuts 53.
Further, the left rear support leg 55 of the left front seat 22 is attached (provided) to the left side sill 13 (including the reinforcing member 21) with a welding bolt 56 and a nut 57.

Further, a right rear support leg 55 (not shown) of the left front seat 22 is attached (provided) to the rear cross member 14 by a welding bolt 56 and a nut 57 (nut 57 is not shown).
Thus, the left front seat 22 is attached to the front cross member 17 and the rear cross member 14.

A left side sill 13 is provided on the vehicle body outside (left outside) of the left floor frame 12 and the left rear floor frame 15.
The left side sill 13 is an aggregate having a closed cross section extending in the vehicle front-rear direction along the left floor frame 12 on the outer side of the rear cross member 14 and the left floor frame 12 along the left floor frame 12.

In addition, a right side sill 13 is provided on the vehicle body outside (right outside) of the right floor frame 12 and the right rear floor frame 15 (see FIG. 2), and extends in the vehicle longitudinal direction.
The right side sill 13 is a member formed symmetrically with the left side sill 13 and will not be described in detail.

  As shown in FIGS. 6 to 8, the left side sill 13 includes a side sill inner 61 having a substantially U-shaped cross section provided on the vehicle width direction center side (vehicle compartment 59 side) and a cross section provided on the vehicle width direction outer side. A substantially silly-shaped side sill outer 62 is provided.

The upper flange 61a of the side sill inner 61 and the upper flange 62a of the side sill outer 62 are joined, and the lower flange 61b of the side sill inner 61 and the lower flange 62b of the side sill outer 62 are joined.
As a result, the side sill inner 61 and the side sill outer 62 are joined to form the left side sill 13 having a closed cross section.

The side sill outer 62 is formed in the outer wall 63 such that an opening 63a extends in the vehicle longitudinal direction (see also FIG. 5).
The guide member 65 (specifically, the lower roller support member 65a and the lower roller 65b) of the slide door 25 is accommodated in the door guide means 23 through the opening 63a.

The side sill inner 61 includes a sill inflating portion 71 at substantially the center in the longitudinal direction of the vehicle body.
The sill inflating part 71 is formed in a substantially Mt. Fuji shape in plan view by projecting from the left side sill 13 toward the inside in the vehicle width direction (that is, inflating toward the vehicle compartment 59 side) (see FIG. 9).

  The sill inflating part 71 is provided below the inflating upper part 72 extending substantially horizontally toward the vehicle compartment 59 side, and below the inflating upper part 72 and at the bottom of the inflating part 73 projecting upwardly toward the vehicle compartment 59 side. And an expansion side wall portion 74 provided on the inner sides 72 a and 73 a of the expansion upper portion 72 and the expansion lower portion 73.

As shown in FIG. 9, the expansion upper portion 72 is formed in a substantially Mt. Fuji shape in a plan view, and a bolt through hole 81 (see also FIG. 7) is formed in a substantially center (sheet attachment portion 72 b) in the longitudinal direction of the vehicle body. Front and rear attachment parts 72c and 72d are provided at the rear of the attachment part 72b.
A welding bolt 56 is passed through the bolt through hole 81. The welding bolt 56 is a fastening member that fastens the left rear support leg 55 of the left front seat (seat) 22 shown in FIG.

The door stopper portion 27 is provided with front and rear bolts 83 (see FIGS. 3 and 4) at the front and rear attachment portions 72c and 72d.
A front mounting hole 82 through which the front bolt 83 can penetrate is formed in the front mounting portion 72c.
A rear mounting hole 82 through which the rear bolt 83 can penetrate is formed in the rear mounting portion 72d.

  The inflated side wall portion 74 includes a front inclined portion 75 extending in an inclined manner from the vicinity of the front cross member 17 toward the rear end portion 12a of the left floor frame 12, and the front inclined portion 75 to the rear end portion 12a. Along the top end (front portion) 76 that extends to the left end portion 14a of the rear cross member 14 and the rear slope portion that extends from the rear end portion of the top portion 76 toward the left side sill 13 in an inclined manner toward the rear of the vehicle body. 77.

As shown in FIGS. 6 and 10, the top portion 76 is joined by spot welding in a state where it is superimposed on the left floor frame 12 (the upper end portion 37 a of the outer wall 37) and the stiffener 38 (stiffener outer portion 38 b) from the outside of the vehicle body. ing.
Thereby, the top part 76, the outer wall 37 (upper end part 37a) of the left floor frame 12, and the stiffener outer side part 38b are joined at the frame joining part (joining part) 84 (see also FIG. 10).

The rear inclined portion 77 includes a rear inclined front half portion (central portion) 78 provided on the vehicle rear side of the top portion 76 and a rear inclined rear half portion (rear portion) 79 provided on the vehicle rear side of the rear inclined front half portion 78. Have.
The rear inclined front half part 78 is joined to the reinforcing member 21 (see FIG. 10) and the rear cross member 14.
The rear inclined rear half 79 is joined to the door guide means 23 (see also FIG. 10).

As shown in FIGS. 10 to 12, the reinforcing member 21 is a reinforcing bracket housed (provided) in the sill inflating portion 71.
The reinforcing member 21 is joined to the substantially rectangular reinforcing side wall 85 joined to the rear inclined front half part 78 of the inflating side wall part 74, and is bent outward from the upper side of the reinforcing side wall 85 in the vehicle width direction and joined to the inflating upper part 72. And a substantially rectangular reinforcing upper portion 86.

  The reinforcing side wall 85 has a reinforcing front side portion 85a joined to the front portion 78a of the front inclined front half portion 78 and the left front flange 42b by spot welding at the cross front connecting portion 102, and the reinforcing rear side portion 85b is connected to the front inclined front half portion 78. It is joined to the rear portion 78b and the left rear flange 43b by spot welding at the cross rear joining portion 103.

That is, the front part 78a of the rear inclined front half part 78 is sandwiched between the reinforcing front side part 85a and the left front flange 42b.
In addition, the rear portion 78b of the rear inclined front half portion 78 is sandwiched between the reinforcing rear side portion 85b and the left rear flange 43b.

The reinforcing side wall 85 has a reinforcing central portion 85 c joined to a central portion 78 c of the rear inclined front half portion 78.
Further, the reinforcing side wall 85 bulges outward in the vehicle width direction so that a bulging portion 85d between the reinforcing front side portion 85a and the reinforcing central portion 85c is separated from the rear inclined front half portion 78.

As shown in FIGS. 12 and 13, the reinforcing upper portion 86 has a bent vicinity portion 86 a and an outer side portion 86 b joined to the back surface 72 e of the expanded upper portion 72 by spot welding.
Specifically, the bent vicinity portion 86 a is joined to the inflated upper portion 72 and the floor panel 16 in a state of being superimposed on the back surface 72 e of the inflatable upper portion 72.
Further, the outer side portion 86b is joined to the inflated upper portion 72 and the floor panel 16 in a state of being overlapped with the back surface 72e of the inflated upper portion 72, like the bent vicinity portion 86a.
The inflated upper portion 72 is superimposed on the back surface 16b of the floor panel 16.

In the reinforcing upper portion 86, a bolt through hole 88 is formed in a seat attachment portion 86c in a substantially central portion (see also FIG. 11).
The bolt through hole 88 is coaxially formed with respect to the bolt through hole 81 of the expansion upper portion 72 and the bolt through hole 89 of the floor panel 16.
The welding bolt 56 is penetrated from below into the bolt through hole 88 of the seat attachment part 86c, the bolt through hole 81 of the expansion upper part 72, and the bolt through hole 89 of the floor panel 16, and the head 58 of the welding bolt 56 is the seat attachment part 86c. It is welded to the back surface 86d.

A mounting hole 55 a of the left rear support leg 55 is fitted into the welding bolt 56 protruding upward from the bolt through hole 89 of the floor panel 16, and a nut 57 is screwed to the welding bolt 56.
As a result, the left rear support leg 55 is fastened (provided) to the expansion upper part 72 and the reinforcement upper part 86 (seat attachment part 86c).
The left rear support leg 55 is a part that supports the slide rail 28 (see FIG. 2) of the left front seat 22.

6 to 8, the door guide means 23 includes a guide storage portion (lower rail bag body) 91 stored in the left side sill 13 and a lower rail 92 stored in the guide storage portion 91. .
The guide storage portion 91 is provided along the left side sill 13 in the left side sill 13 having a closed cross section, and a space 93 for storing the guide member 65 (specifically, the lower roller support member 65a and the lower roller 65b) of the slide door 25. It is a member provided with.

Specifically, the guide storage portion 91 includes a guide ceiling portion 95 provided along the expansion upper portion 72, a guide bottom portion 96 provided at a predetermined interval below the guide ceiling portion 95, and a guide ceiling portion 95. And a guide side wall portion 97 that connects the outer side 96a of the guide bottom portion 96 to each other.
The guide storage 91 is formed of a guide ceiling 95, a guide bottom 96, and a guide side wall 97 in a substantially U-shaped cross section.

Further, the guide storage portion 91 is joined in a state where the upper flange 98 is sandwiched between the upper flange 61 a of the side sill inner 61 and the upper flange 62 a of the side sill outer 62, and the lower flange 99 is joined to the outer wall portion 63 of the side sill outer 62. Has been.
In addition, as shown in FIG. 6, the guide storage portion 91 is supported by the support member 101 at the guide bottom portion 96. The support member 101 is joined in a state where the upper end portion 101 a is joined to the guide bottom portion 96 and the lower end portion 101 b is sandwiched between the lower flange 61 b of the side sill inner 61 and the lower flange 62 b of the side sill outer 62.

In this state, the space 93 of the guide storage portion 91 is provided so as to face the opening 63 a of the outer wall portion 63.
Further, as shown in FIG. 6, the guide storage portion 91 is provided at a position where the guide side wall portion 97 is separated by a predetermined distance H1 from the top portion 76, and as shown in FIG. It is provided at a position spaced apart from the rear inclined front half part 78 of the part 77 by a predetermined distance H2.
Further, as shown in FIG. 8, the guide storage portion 91 is joined by spot welding at a guide joining portion (joining portion) 105 in a state where the guide side wall portion 97 is overlapped with the rear inclined rear half portion 79 of the rear inclined portion 77. Has been.

Returning to FIG. 11, the sill expansion part 71 has the top part 76 joined to the left floor frame 12 (the upper end part 37 a of the outer wall 37) and the stiffener outer part 38 b by spot welding at a frame joining part (joining part) 84. .
That is, the top portion 76 of the sill expansion portion 71 (left side sill 13) is joined to the left floor frame 12.

Further, the sill expansion portion 71 has a front portion 78a of the rear inclined front half portion 78 joined to the left front flange 42b by spot welding at the cross front joining portion 102, and a rear portion 78b of the rear inclined front half portion 78 to the left rear flange 43b. Joining is performed by spot welding at the post-cross bonding portion 103.
That is, the rear inclined front half part 78 of the sill expansion part 71 (left side sill 13) is joined to the left end part 14 a of the rear cross member 14.

Further, in the sill expansion part 71, the rear inclined rear half part 79 is joined to the guide side wall part 97 of the guide storage part 91 by spot welding at a guide joining part (joining part) 105.
In other words, the rear inclined rear half 79 of the sill expansion part 71 (left side sill 13) is joined to the guide storage part 91.

Therefore, the top portion 76, the rear inclined front half portion 78, and the rear inclined rear half portion 79 of the sill inflating portion 71 can be reinforced by the left floor frame 12, the rear cross member 14, and the guide storage portion 91, respectively.
Thereby, the rigidity of the sill expansion part 71 (namely, the left side sill 13) can be secured by the three members 12, 14, 91.

By securing the rigidity of the sill inflating portion 71 (that is, the left side sill 13) with the three members 12, 14, 91, the large-sized reinforcing gusset described in the prior art can be made unnecessary, and an increase in the weight of the vehicle body can be suppressed. it can.
In addition, the number of parts can be reduced by eliminating the need for large-shaped reinforcing gussets. By reducing the number of parts, the step of assembling the reinforcing gusset to the left side sill 13 becomes unnecessary, and the number of assembling steps can be reduced.

By the way, the front part 78a of the rear inclined front half part 78 is sandwiched between the reinforcing front side part 85a of the reinforcing side wall 85 and the left front flange 42b of the rear cross member 14.
Further, the rear inclined front half portion 78 b is sandwiched between the reinforcing rear side portion 85 b of the reinforcing side wall 85 and the left rear flange 43 b of the rear cross member 14.

In addition, the left rear support leg 55 of the left front seat 22 (see FIG. 2) is attached to the inflated upper portion 72 and the reinforcing upper portion 86 (seat attachment portion 86c) with welding bolts 56 and nuts 57.
Here, the reinforcing side wall 85 and the reinforcing upper part 86 are parts constituting the reinforcing member 21.
The inflated upper portion 72 is a part that constitutes a part of the left side sill 13.

Therefore, the load acting on the left front seat 22 shown in FIG. 2 can be transmitted to the left side sill 13 and the reinforcing member 21. The load acting on the reinforcing member 21 from the left front seat 22 can be distributed to the rear cross member 14 via the reinforcing member 21.
Thereby, it becomes possible to suppress the rigidity of the reinforcing member 21, and it is not necessary to make the reinforcing member 21 larger than necessary, and the reinforcing member 21 can be made compact and lightweight.

  Returning to FIG. 10, a guide joint portion (joint portion) 105 in which the guide side wall 97 of the guide storage portion 91 is joined to the rear slope latter half 79 of the rear slope 77 by spot welding is in the vicinity of the rear side of the reinforcing member 21 in the vehicle body. (Near).

Therefore, the load acting on the reinforcing member 21 from the left front seat 22 can be distributed to the guide storage portion 91 via the rear inclined rear half portion 79.
Thereby, the rigidity of the reinforcing member 21 can be further suppressed, and the reinforcing member 21 can be further reduced in size and weight.

Furthermore, as described above, the frame joint portion (joint portion) 84 is formed in a state where the top portion 76 is superimposed on the left floor frame 12 (the upper end portion 37a of the outer wall 37) and the stiffener 38 (stiffener outer portion 38b) from the outside of the vehicle body. Joined by spot welding.
The frame joint portion 84 is provided in the vicinity (near) the front of the vehicle body of the reinforcing member 21.

Therefore, the load acting on the reinforcing member 21 from the left front seat 22 can be distributed to the left floor frame 12 via the top portion 76.
Thereby, the rigidity of the reinforcing member 21 can be further suppressed, and the reinforcing member 21 can be further reduced in size and weight.

As shown in FIGS. 6 to 8, the lower rail 92 is housed in the guide housing portion 91, and is provided on the guide ceiling portion 95 along the longitudinal direction of the vehicle body.
A lower roller 65 b is slidably provided on the lower rail 92. Thus, the slide door 25 is supported so as to be movable in the longitudinal direction of the vehicle body along the lower rail 92.

Here, when the slide door 25 is moved rearward and opened, the fuel lid 111 (see FIG. 1) is hidden by the slide door 25.
Therefore, a door stopper portion 27 (see FIGS. 3, 4, and 14) that prevents the slide door 25 from opening in a state where the fuel lid 111 is opened and the fuel filler 112 (see FIG. 1) is opened is provided.

As shown in FIG. 14, the door stopper portion 27 is provided on the rear side of the vehicle body of the bolt through hole 81 (seat mounting portion 72 b) through which the welding bolt 56 passes through the expansion upper portion 72.
The door stopper portion 27 includes a mounting bracket 121 provided with front and rear bolts 83 at the rear of the vehicle body of the seat mounting portion 72b, a lock member 123 rotatably provided on the mounting bracket 121 via a support shaft 122, A coil spring 124 that holds the lock member 123 in the unlock position P1 and an operation cable 125 that can move the lock member 123 to the lock position P2 against the urging force of the coil spring 124 are provided.

According to the door stopper 27, the operation cable 125 is pulled in the direction of the arrow in conjunction with the opening of the fuel lid 111 in a state where the fuel lid 111 is opened and the fuel filler port 112 (see FIG. 1) is opened.
By pulling the operation cable 125, the lock member 123 moves to the lock position P2 against the urging force of the coil spring 124.
When the lock member 123 moves to the lock position P2, the lock member 123 is locked to the bottom of the slide door 25 (see FIG. 1). As a result, the lock member 123 can prevent the slide door 25 from opening.

Here, the mounting bracket 121 has front and rear mounting flaps 127 and 128.
The front attachment flap 127 is fastened to the front attachment portion 72c of the expansion upper portion 72 and the front attachment portion 95b of the guide ceiling portion 95 with a front bolt 83 and a front welding nut 87 (that is, a fastening member).
The rear mounting flap 128 is fastened to the rear mounting portion 72d of the expansion upper portion 72 and the rear mounting portion 95c of the guide ceiling portion 95 with a rear bolt 83 and a rear welding nut 87 (that is, a fastening member).

Therefore, the load acting on the reinforcing member 21 from the left front seat 22 (see FIG. 1) is distributed to the guide accommodating portion 91 via the front bolt 83 and the front welding nut 87, and the rear bolt 83 and the rear welding nut 87 are It can be dispersed in the guide storage part 91 via
Thereby, the rigidity of the reinforcing member 21 can be further suppressed, and the reinforcing member 21 can be further reduced in size and weight.

Here, the front mounting part 72c of the expansion upper part 72 and the front mounting part 95b of the guide ceiling part 95 are parts provided in the vicinity of the rear of the vehicle body with respect to the bolt through hole 81 (seat mounting part 72b).
Further, the rear attachment portion 72d of the expansion upper portion 72 and the rear attachment portion 95c of the guide ceiling portion 95 are portions provided in the vicinity of the rear of the vehicle body with respect to the bolt through hole 81 (seat attachment portion 72b).

In addition, the reinforcing upper portion 86 (sheet attachment portion 86 c) is provided above the guide storage portion 91. Therefore, the seat attachment portion 86 c can be provided in the vicinity of the guide storage portion 91.
The left rear support leg 55 (the left front seat 22 (see FIG. 2)) is fastened to the seat attachment portion 86c with a welding bolt 56 and a nut 57.

Further, the seat attachment portion 86 c (that is, the reinforcing member 21) is connected to the guide storage portion 91 via the expansion side wall portion 74.
As a result, the load applied from the left front seat 22 to the seat attachment portion 86c via the welding bolt 56 is more efficiently distributed to the guide storage portion 91 via the expansion side wall portion 74, thereby reducing the size and weight of the reinforcing member 21. Can be further promoted.

Returning to FIGS. 13 and 14, the welding bolt 56 protrudes upward from the seat attachment portion 86 c, and the nut 57 is screwed to the protruding welding bolt 56, so that the left front seat 22 shown in FIG. The rear support leg 55 was fastened.
Here, the welding bolt 56 is a bolt used by providing a plurality of protrusions (not shown) on the seating surface of the head 58 and welding the plurality of protrusions to the back surface 86 d of the reinforcing upper portion 86.

Here, when the left rear support leg portion 55 is fastened with a bolt / weld nut instead of the weld bolt 56 / nut 57, the threaded portion of the weld nut and the bolt protrudes toward the guide storage portion 91 side.
On the other hand, in the embodiment, the left rear support leg 55 is screwed with the welding bolt 56 and the nut 57 so that only the head portion 58 of the welding bolt 56 protrudes toward the guide storage portion 91 side.
Therefore, by using the welding bolt 56 and the nut 57, it is possible to suppress the amount of protrusion toward the guide storage portion 91 to be smaller than that of the bolt and the welding nut.

Thereby, height H3 (refer FIG. 14) of the expansion upper part 72 of the left side sill 13 which provides the left rear support leg part 55 can be lowered | hung.
A step for getting on and off is provided on the expansion upper portion 72 of the left side sill 13. Thereby, in the state which maintained the height of the guide accommodating part 91, it becomes possible to suppress the step height for boarding / alighting, and boarding / alighting property can be ensured.

  Next, an example of supporting a load acting on the left side sill 13 from the left front seat 22 (see FIG. 2) will be described in detail with reference to FIGS.

As shown in FIG. 15A, when the opponent vehicle collides with the vehicle body structure 10 with a sliding door from the front right side, the left front seat 22 (see also FIG. 2) tends to move toward the front of the vehicle body. Force acts toward the front right direction.
This inertial force acts on the left side sill 13 and the reinforcing member 21 (see FIG. 15B) in the front right direction as “sheet load F1 acting on the left side sill and reinforcing member from the seat” through the welding bolt 56.

As shown in FIG. 15B, the seat load F1 acting on the left side sill 13 and the reinforcing member 21 is branched as a load F2 in the vehicle width direction, and is branched as a load F3 in the front direction of the vehicle body.
Here, the reinforcing side wall 85 of the reinforcing member 21 is connected to the rear cross member 14 via the rear inclined front half part 78 (see FIG. 11) of the left side sill 13.
Therefore, the load F2 branched in the vehicle width direction can be transmitted to the rear cross member 14, and the transmitted load F2 can be supported by the rear cross member 14.

On the other hand, the top portion 76 of the left side sill 13 is joined to the left floor frame 12 at a frame joining portion 84.
Further, the rear inclined rear half portion 79 of the left side sill 13 is joined to the guide side wall portion 97 of the guide storage portion 91 at the guide joining portion 105.

  Therefore, a part of the load F3 branched in the front direction of the vehicle body is transmitted as the load F4 to the left floor frame 12 through the left side sill 13 and the frame joint portion 84, and the transmitted load F4 is supported by the left floor frame 12. it can.

  Further, a part of the load F3 branched in the front direction of the vehicle body is transmitted as the load F5 to the guide storage portion 91 through the left side sill 13 and the guide joint portion 105, and the transmitted load F5 is supported by the guide storage portion 91. it can.

As described above, the load F2 branched in the vehicle width direction is supported by the rear cross member 14, and a part of the load F3 branched in the vehicle body front direction is supported by the left floor frame 12 or the guide storage portion 91, thereby reinforcing the member. The rigidity of 21 can be suppressed.
Thereby, it is not necessary to make the reinforcing member 21 larger than necessary, and the reinforcing member 21 can be made compact and lightweight.

Here, the frame joining portion 84 is provided in front of the vehicle body with respect to the welding bolt 56. Therefore, a buckling load (compressive load) acts on the portion of the expanded side wall portion 74 between the weld bolt 56 and the guide joint portion 84.
In general, buckling deformation is likely to occur when the plate thickness is relatively thin. For this reason, it is preferable to reduce the buckling load.

Therefore, a guide joint portion 105 is provided on the rear side of the vehicle body with respect to the welding bolt 56.
Therefore, a part of the load F3 transmitted from the welding bolt 56 to the front of the vehicle body can be supported as the tensile load F5 by the guide storage portion 91 via the guide joint portion 105.

Thereby, the load F4 which acts as a buckling load on the part between the welding bolt 56 and the guide joint part 84 in the expansion side wall part 74 can be kept small.
By suppressing the load F4 to be small, it is possible to prevent the portion between the welding bolt 56 and the guide joint portion 84 of the expansion side wall portion 74 from being buckled and deformed, and the load F4 is transmitted to the left floor frame 12 so that the left floor frame 12 can reliably Can support you.

In addition, as described above, since the buckling deformation is likely to occur when the plate thickness is relatively thin, it is preferable to support the applied load as a tensile load.
Therefore, by causing a part of the load F3 transmitted from the welding bolt 56 to the front of the vehicle body to act on the guide joint portion 105 as the tensile load F5, the tensile load F5 passes through the guide joint portion 105 and becomes efficient at the guide storage portion 91. Can support well.

As shown in FIG. 16, the front mounting flap 127 of the door stopper portion 27 is fastened to the front mounting portion 72 c of the expansion upper portion 72 and the front mounting portion 95 b of the guide ceiling portion 95 with a front bolt 83 and a front welding nut 87. .
Further, the rear attachment flap 128 of the door stopper portion 27 is fastened to the rear attachment portion 72d of the expansion upper portion 72 and the rear attachment portion 95c of the guide ceiling portion 95 with a rear bolt 83 and a rear welding nut 87.

Therefore, a part of the load F3 branched in the vehicle body front direction is transmitted as the load F6 to the guide storage portion 91 via the front bolt 83 and the front welding nut 87, and the transmitted load F6 is supported by the guide storage portion 91. Can do.
Further, a part of the load F3 branched in the front direction of the vehicle body is transmitted as the load F7 to the guide storage portion 91 via the rear bolt 83 and the rear welding nut 87, and the transmitted load F7 is supported by the guide storage portion 91. Can do.
Thereby, the rigidity of the reinforcing member 21 can be further suppressed, and the reinforcing member 21 can be further reduced in size and weight.

Here, among the left front seat 22 shown in FIG. 2, there is a seat belt built-in seat in which a seat belt system such as a retractor or an anchorage is built in the seat.
When the opponent vehicle collides during forward travel of a vehicle equipped with a seat belt built-in type seat, an upward inertia force that attempts to lift the occupant from the seat acts on the occupant.
This upward inertia force becomes “the seat load acting on the left side sill and the reinforcing member from the seat”.

Thus, even when the “seat load acting on the left side sill or the reinforcing member from the seat” acts upward, the rear cross member 14 and the left floor frame are similar to the seat load F1 shown in FIGS. 12 and the guide storage part 91.
Thereby, even when “the seat load acting on the left side sill or the reinforcing member from the seat” acts upward, the reinforcing member 21 does not need to be made larger than necessary, and the reinforcing member 21 is made compact and lightweight. Can be achieved.

In addition, the vehicle body structure 10 with a sliding door according to the present invention is not limited to the above-described embodiment, and can be appropriately changed and improved.
For example, in the above-described embodiment, the example in which the present invention is applied to a center pillar-less vehicle that does not include a center pillar has been described. However, the present invention is not limited thereto, and the present invention can also be applied to a vehicle that includes a center pillar. It is.

  Moreover, in the said Example, although the example which applied this invention to the left side sill 13 was demonstrated, it is also possible to apply this invention to the right side sill 13 without being restricted to this.

  Furthermore, in the said Example, although the front volt | bolt 83, the front welding nut 87, the rear volt | bolt 83, and the rear welding nut 87 were illustrated as a fastening member which attaches the door stopper part 27, it is not restricted to this, Other fastening, such as a rivet, is carried out. It is also possible to use members.

  In the above-described embodiment, an example in which the seat load F1 acts toward the front of the vehicle body (specifically, the front right direction) has been described. However, the present invention is not limited thereto, and the seat load F1 acts toward the rear of the vehicle body. The same effect can be obtained when doing so.

  Further, in the above-described embodiment, the example in which the left rear support leg 55 of the left front seat 22 is attached with the welding bolt 56 and the nut 57 has been described. You may comprise so that it may attach.

  Further, the left and right floor frames 12, the rear cross member 14, the left and right side sills 13, the reinforcing member 21, the left front seat 22, the slide door 25, the door stopper portion 27, the left rear support leg portion 55, the guide shown in the above embodiment. The shape and configuration of the member 65, the sill inflating portion 71, the top portion 76, the rear inclined front half portion 78, the rear inclined rear half portion 79, the seat mounting portion 86c, the guide storage portion 91, the fuel filler port 112, etc. are not limited to those illustrated. It can be changed as appropriate.

  The present invention is suitable for application to an automobile having a vehicle body structure with a sliding door in which a side sill is provided on the outer side of a cross member and a floor frame.

  DESCRIPTION OF SYMBOLS 10 ... Car body structure with a sliding door, 12 ... Left and right floor frame (floor frame), 13 ... Left and right side sill (side sill), 14 ... Rear cross member (cross member), 21 ... Reinforcement member, 22 ... Left front seat (seat ), 25 ... Slide door, 27 ... Door stopper, 55 ... Left rear support leg, 56 ... Weld bolt, 57 ... Nut, 59 ... Car compartment, 65 ... Guide member, 71 ... Sill expansion part, 76 ... Top ( Front part), 78 ... rear inclined front half part (center part), 79 ... rear inclined rear half part (rear part), 83, 87 ... front bolt / front welding nut, rear bolt / rear welding nut (fastening member), 84 ... frame Joining part (joining part), 86c ... sheet attachment part, 91 ... guide storage part, 105 ... guide joining part (joining part), 112 ... fueling port.

Claims (6)

A floor frame extends in the longitudinal direction of the vehicle body, a cross member extends in the vehicle width direction so as to intersect the floor frame, and the floor frame extends outside the vehicle body of the cross member and the floor frame. A side sill with a closed cross section extends along the side sill, and a vehicle body structure with a sliding door provided with a guide storage portion for storing a guide member of a slide door in the side sill with a closed cross section,
The side sill is
It has a sill expansion part expanded toward the passenger compartment side,
The sill expansion part is
A front part joined to the floor frame;
A central portion provided on the vehicle body rear side of the front portion and joined to the cross member;
A rear portion provided on the vehicle body rear side of the central portion and joined to the guide storage portion;
A vehicle body structure with a sliding door. A reinforcing member is provided in the sill expansion part,
The vehicle body structure with a sliding door according to claim 1, wherein a central portion of the sill expansion portion is sandwiched between the reinforcing member and the cross member, and a sheet is provided on the reinforcing member. In the vicinity of the reinforcing member, provided with a door stopper portion capable of preventing the sliding door from opening in an open state of the fuel filler opening,
The vehicle body structure with a sliding door according to claim 1, wherein the door stopper portion is fastened to the guide storage portion by a fastening member that penetrates the sill expansion portion.   The vehicle body structure with a sliding door according to any one of claims 1 to 3, wherein a joint portion where the guide storage portion and the rear portion are joined is in the vicinity of the reinforcing member.   The vehicle body structure with a sliding door according to any one of claims 1 to 4, wherein a joint portion where the floor frame and the front portion are joined is in the vicinity of the reinforcing member. Of the reinforcing member, a seat attachment portion for attaching the seat is provided above the guide storage portion,
The welding bolt is protruded upward from the seat attachment site, and the sheet is fastened using a nut to the protruding welding bolt. Body structure with sliding door.

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