JP4621978B2 - Vehicle seat mounting structure - Google Patents

Description

  The present invention relates to a vehicle seat mounting structure for attaching a seat to a vehicle floor panel.

  Conventionally, a vehicle such as an automobile is provided with a floor panel, and a seat is attached to the floor panel. Many of the first row seats of automobiles are slide seats that can slide the seat body (seat cushion, seat back) back and forth, and second row seats, third row as in wagon type cars. Some seats are slide seats. In this slide seat, a guide rail (lower rail) at the seat base is attached to the floor panel via a bracket.

  In the vehicle seat mounting structure of Patent Document 1, the seat legs are respectively fixed to the rear end portions of the two adjacent guide rails of the seats arranged side by side in the vehicle width direction, and are flat surfaces projecting rearward from these seat legs. The optic portal bracket is fixed. A closed section is formed by the floor panel and a cross member extending in the vehicle width direction disposed below the floor panel, and the bracket is attached to a floor panel portion where the closed section is formed. In this case, a plurality of bolts are inserted into the bracket from above, and are respectively screwed into a plurality of nuts arranged in the closed cross section.

  Thus, the attachment strength of the seat can be increased by attaching the seat base such as the guide rail to the floor panel portion where the closed cross section is formed. By the way, as disclosed in Patent Document 1, the shape of the floor panel and the cross member of the part to which the seat base is attached is not only a simple one in which the floor panel is flat and the cross member extends straight, Many of them are curved under the influence of the arrangement of other parts and members (for example, insulators and drive shafts).

JP 2004-168235 A

  In order to attach the seat base of the seat to the floor panel portion where the closed section is formed, a bolt is inserted from above into a bracket fixed to the guide rail, and screwed into a nut disposed in the closed section Therefore, it is necessary to secure a bolt insertion space for the bolt inserted into the closed cross section. However, the shape of the floor panel and cross member where the seat base is attached is curved due to the influence of the arrangement of other components and members, and the vertical length of the closed cross section changes in the vehicle width direction. If it becomes too small, the bolt insertion space may not be sufficiently secured due to the influence of the arrangement of the sheet.

  Patent Document 1 only discloses that the floor panel of the part to which the seat base is attached is flat and the cross member extends straight, and the above-mentioned problems and means for solving the problems are also disclosed. It has not been done. Further, in the vehicle seat mounting structure of Patent Document 1, since the bracket is provided so as to project to the rear side of the guide rail, the bracket is particularly provided when there is a boarding space on the rear side of the seat. May be unsightly or disturbing.

  An object of the present invention is to form a floor panel or a cross member in which the shape of the floor panel or the cross member is curved when a bolt is inserted from above into a floor panel portion where a closed section is formed by the floor panel and the cross member. Even when the vertical length of the closed cross section changes in the vehicle width direction and partially becomes too small, a sufficient space for bolt insertion of the bolt inserted into the closed cross section is secured, and the seat base of the seat It is an object to provide a vehicle seat mounting structure that can be easily and reliably mounted on a floor panel with high mounting strength.

The vehicle seat mounting structure according to claim 1, of the floor panel of the vehicle, the floor panels substantially of the floor panel portions fraction closed section is formed by the cross member extending disposed the vehicle width direction on the lower side A vehicle seat mounting structure in which a seat is attached to a horizontal portion by screwing , and the bottom surface of the cross member is curved downward and away from the seat base in the vehicle width direction at the seat base at the lower end of the seat. by extending Te, vertical length of the closed section of the extending portion extending in the larger side than the vertical length of the closed section formed in the center portion of the seat base, the bolt to the extended portion from above of the upper and lower length in that a mounting portion which is screwed into a nut provided in the closed plane is inserted along the direction attaching said extending portion on the floor panel portion in a substantially horizontal portion of the floor panel portion It is an butterfly.

In this vehicle seat mounting structure, closed cross-section in the floor panel and the cross member extending disposed the vehicle width direction on the lower side is formed substantially in the front door panel portion where the closed section is formed of the floor panel A sheet is attached to a horizontal part by screwing . In this case, an extension portion is provided in the seat base portion at the lower end portion of the seat, and the extension portion extends in a vehicle width direction so that the bottom surface of the cross member is curved and extends downward in the direction away from the seat base portion. The vertical length of the closed cross section extends to the side where the vertical length of the closed cross section is larger than the vertical length of the closed cross section at the center of the seat base, and in the mounting portion, a bolt is inserted into the extended portion from above along the vertical length direction. screwed into a nut provided on the closed plane, the extending portion is attached to the floor panel portion. The nut is, for example, fixed and held in advance by spot welding or an adhesive on the back side of the floor panel portion where the mounting portion is provided, and the bolt can be easily and securely screwed into the nut by inserting the bolt into the closed cross section. Thus, the attachment portion can be attached to the floor panel.

  By the way, the floor panel and the cross member where the extension portion is to be attached are influenced by the arrangement of other members and parts (for example, insulators and drive shafts), and the shape of the floor panel and the cross member is closed in the vehicle width direction. Even when the vertical length of the cross section changes and becomes partially too small, as described above, the extension portion has an upper and lower length of the closed cross section in the center portion of the seat base in the vehicle width direction. Since it extends to the side larger than the length, it is possible to secure a sufficient bolt insertion space for the bolt to be inserted into the closed cross section in the mounting portion without being affected by the arrangement of the seat. Can be easily and securely attached to the floor panel with high mounting strength.

In the invention of claim 1, it can be configured as follows.
The seat base is disposed at the substantially horizontal portion of the inflating portion that is expanded upward with respect to the horizontal surface of the surrounding floor panel in the floor panel portion , and the bottom surface of the cross member is has a curved portion which is curved upwardly along the expansion portion of the floor panel part, before Symbol sites located immediately below the mounting portion of the cross member of the bottom, the mounting section side downward from the seat base in the vehicle width direction is inclined (claim 2). Wherein with the center tunnel portion in the front-rear direction orientation in the vehicle width direction central portion of the floor panel is formed, a saddle type fuel tank is disposed lower side of the center tunnel portion and the click Rosumenba, the said center tunnel portion setting the mounting portion takes (claim 3).

The extending portion is configured to extend from the center portion of the seat base to both sides in the vehicle width direction, and of the extending portions on both sides in the vehicle width direction, the upper and lower lengths of the closed cross section on the lower side are larger. together attached to the floor panel by the mounting unit, it via a positioning pin vertically length of the closed section is smaller providing a positioning portion for positioning the floor panel (claim 4).

Said sheet base, said a long guide rail in the longitudinal direction transverse to the upper cross member, the guide rail is fixed is composed of a mounting plate having the extending portion, it is attached to the front Symbol floor panel by the mounting portion Rutotomoni is extended to the sheet center side than the guide rail the extending portion, is bulged upward than its peripheral portion a portion where the extending portion is mounted within the floor panel (claim 5). The height of the closed section below the positioning portion is greater than the height of the closed section below the seat base (Claim 6).

According to the vehicle seat mounting structure according to claim 1, of the floor panel of the vehicle, the Furoapa channel portion closed section is formed by the cross member extending in the vehicle width direction is disposed floor panel and its lower side It is a structure in which the seat is attached to a substantially horizontal portion by screwing , and the bottom surface of the cross member in the vehicle width direction extends downwardly in a direction away from the seat base in the vehicle width direction . An extending portion is provided that extends to the side where the vertical length of the closed cross section is larger than the vertical length of the closed cross section at the center of the seat base, and a bolt is inserted through the extended portion from above in the vertical length direction. is provided with the mounting portion is screwed into a nut provided in the closed plane mounting said extending portion on the floor panel portion in a substantially horizontal portion of the floor panel portion, the portion for mounting the extending portion The floor panel and cross member are affected by the arrangement of other members and parts (for example, insulators and drive shafts), etc., and the shape of the floor panel and cross member changes and the vertical length of the closed section changes in the vehicle width direction. Even if it becomes too small, the seat base of the seat is secured by securing a sufficient bolt insertion space for the bolt to be inserted into the closed section in the mounting portion without being affected by the arrangement of the seat. Can be easily and reliably attached to the floor panel with high attachment strength.

According to the vehicle seat mounting structure of the third aspect , the center tunnel portion in the front-rear direction is formed at the center portion in the vehicle width direction of the floor panel, and the vertical fuel tank is provided below the center tunnel portion and the cross member. Since it is disposed, it is possible to reliably secure a space for arranging the vertical fuel tank, and to secure a space for arranging the insulator and the drive shaft below the vertical fuel tank. Further, by providing the mounting portion in the center tunnel portion, even if there is a portion where the vertical length of the closed cross section becomes too small in the center tunnel portion, a bolt insertion space for the bolt inserted into the closed cross section is secured. An attachment portion can be provided as much as possible.

According to the vehicle seat mounting structure of claim 4, the extending portion is configured to extend from the center portion of the seat base to both sides in the vehicle width direction, and the lower portion of the extending portions on both sides in the vehicle width direction is configured. wherein together attached to the floor panel by the mounting portion towards the upper and lower lengths is large closed cross section, is provided with the positioning portion for positioning towards the vertical length of the closed section is small floor panel through the positioning pin, said wheel The extension part on one side of both sides in the width direction can be reliably positioned on the floor panel, and the bolt insertion space is securely secured in the mounting part, and the extension part on the other side can be easily and securely secured to the floor panel. Since it can be attached to the seat, it is possible to improve the seat attachment property (assembly property).

  According to the vehicle seat mounting structure of claim 5, the seat base is composed of a guide rail that is long in the front-rear direction across the cross member, and a mounting plate that is fixed to the guide rail and has an extending portion. The seat base portion of the slide sheet can be securely attached to the floor panel portion where the closed cross section is formed, and the extension portion can be easily provided by fixing the attachment plate to the guide rail.

In addition, the extension portion attached to the floor panel by the attachment portion extends to the seat center side from the guide rail, and the portion of the floor panel to which the extension portion is attached bulges above the peripheral portion. Therefore, it is possible to improve the appearance by providing this extended part in an inconspicuous position that is covered with the seat body, and even when the mounting part is provided in the center tunnel part of the floor panel, the bolt is inserted in the mounting part. Space can be secured reliably, the structure of the mounting plate can be simplified so that the extension can be attached to the floor panel by extending it almost horizontally, and the extension can be securely attached to the floor panel. Is possible.

The vehicle seat mounting structure of the present invention is a substantially horizontal floor panel portion in which a closed cross-section is formed by a floor panel and a cross member extending in the vehicle width direction disposed below the floor panel of the vehicle. the sheet portion a seat mounting structure for a vehicle attached by screwing, to the seat base of the lower end portion of the sheet, and curved downward in the vehicle width direction to a direction in which the cross member bottom leaves the seat base or al By extending, an extending portion is provided that extends to a side where the vertical length of the closed cross section is larger than the vertical length of the closed cross section at the center of the seat base, and a bolt is provided on the extended portion from above to the direction of the vertical length der which substantially provided on a horizontal portion of the mounting portion floor panel portion which is inserted is screwed into a nut provided in the closed plane mounting said extending portion on the floor panel portion along the .

  As shown in FIGS. 1 and 2, the vehicle 1 is provided with two sets of second-row seats 2L and 2R arranged side by side in the vehicle width direction (left-right direction). These second row seats 2L, 2R are slide seats that are divided in a predetermined ratio (for example, 6: 4) in the vehicle width direction and slide independently back and forth, and each of the second row seats 2L, 2R A pair of left and right guide rails 3L1, 3L2, 3R1, 3R2 which are long in the front-rear direction are provided on the seat base at the lower end, and these guide rails 3L1, 3L2, 3R1, 3R2 are attached to the floor panel 4. In FIGS. 1 and 2, the floor panel 4 is omitted. The four guide rails 3L1, 3L2, 3R1, and 3R2 have the same structure, but the second row seats 2L and 2R are, for example, divided into 6: 4 in the vehicle width direction, so that the left two rows The guide rail 3L2 on the right side of the eye seat 2L is attached to the center of the floor panel 4 in the vehicle width direction.

  The vehicle 1 is provided with a pair of left and right side frames 5 extending in the front-rear direction and a plurality of cross members 6A to 6F extending in the vehicle width direction. The floor panel 4 is disposed on the side frames 5 and the cross members 6A to 6F. Is provided. The cross member 6C is formed in a concave shape in cross section, and is disposed on the lower side of the floor panel 4 and welded to the floor panel 4. The cross member 6C and the floor panel 4 form a closed cross section 7, and the cross member 6D also has a cross section. It is formed in a concave shape, disposed below the floor panel 4 and welded to the floor panel 4, and the closed cross section 8 is formed by the cross member 6 </ b> D and the floor panel 4.

  The guide rails 3L2 and 3R1 of the second row seats 2L and 2R are arranged so as to cross the cross members 6C and 6D in the front-rear direction, and are closed out of the floor panel 4 at two front and rear positions in the middle in the length direction. It is attached to the floor panel portions 4a and 4b in which the cross sections 7 and 8 are formed via attachment plates 10 (22) and 11. The rear end portions of the guide rails 3L2 and 3R1 are also attached to the floor panel 4 via the attachment plate 12. In the second row seats 2L and 2R, upper rails 9L1, 9L2, 9R1 and 9R2 fixed to lower ends of seat bodies (seat cushions and seat backs) are respectively provided as guide rails 3L1, 3L2, 3R1 and 3R2 (lower rails). ) Is supported by the guide so as to be movable back and forth.

  The vehicle seat mounting structure 20 according to the present invention is a structure in which the front portion of the right seat base 21 at the lower end of the left second row seat 2L is mounted to the floor panel portion 4a. Explained. Here, the seat base 21 is composed of a metal guide rail 3L2 and a metal mounting plate 22 fixed to the guide rail 3L2.

First, the structure around the vehicle seat mounting structure 20 will be described.
As shown in FIGS. 1 to 5, a center tunnel portion 4 c facing in the front-rear direction that is curved so as to bulge upward is formed at the vehicle width direction center portion of the floor panel 4. The height of the center tunnel portion 4c in the floor panel portion 4a is relatively large, and is, for example, about 5 to 10 cm higher than the other flat surface of the floor panel 4. For example, the height of the center tunnel portion 4c gradually decreases toward the rear side, and in the floor panel portion 4b, the center tunnel portion 4c is almost eliminated and becomes flat.

  Further, the center portion of the cross member 6C in the vehicle width direction is formed in a curved portion 6Ca that is curved so as to bulge upward in accordance with the center tunnel portion 4c. And the insulator 23 is arrange | positioned under the center tunnel part 4c and the curved part 6Ca. A rectangular vertical fuel tank 24 in a plan view is disposed so as to straddle the insulator 23 at a portion including the center tunnel portion 4c of the floor panel 4 and below the cross members 6C and 6D.

  In this vehicle seat mounting structure 20, the mounting plate 22 is fixed to the lower surface of the guide rail 3L2 by welding or the like, and extends to both sides of the guide rail 3L2 (from the center portion of the seat base 21) in the vehicle width direction. Is formed in the first extension portion 30, and the right side portion is formed in the second extension portion 31. The first extending portion 30 extends to the side (left side) in which the vertical length of the closed cross section 7 is larger than the vertical length of the closed cross section 7 at the center of the seat base 21 (guide rail 3L2) in the vehicle width direction. It extends to the center side of the second-row seat 2L from the rail 3L2, and a bolt 41 is inserted from above into the first extending portion 30 and screwed into a nut 42 provided in the closed cross section 7 for the first extension. An attachment portion 40 for attaching the portion 30 to the floor panel 4 is provided.

  The second extending portion 31 extends to the side opposite to the first extending portion 30 (right side). However, in the present embodiment, the second extending portion 31 also has the seat base portion 21 with the vertical length of the closed section 7 in the vehicle width direction. A positioning portion 50 is provided which extends to a side larger than the vertical length of the closed cross section 7 at the center portion thereof, and positions the second extending portion 31 on the floor panel 4 via the positioning pins 51. The portion of the floor panel 4 to which the first extension portion 30 is attached is formed as a bulging portion 4d that bulges upward from the peripheral portion thereof. Therefore, the lower extension of the first extension portion 30 is closed. The vertical length of the cross section 7 is larger than the vertical length of the closed cross section 7 on the lower side of the second extension portion 31, and the upper and lower lengths of the closed cross section 7 on the lower side of the first and second extension portions 30 and 31. The longer side (first extending portion 30) is attached to the floor panel 4 by the attaching portion 40, and the one having the smaller vertical length of the closed cross section 7 (second extending portion 31) is attached to the floor panel 4 by the positioning portion 50. Positioned.

  In the mounting portion 40, relatively large bolt holes 30a, 4e are formed in the first extending portion 30 and the bulging portion 4d of the floor panel portion 4a, and a cross is provided below the floor panel portion 4a where the mounting portion 40 is provided. A metal reinforcing member 43 having a hat-shaped cross section as viewed from the front-rear direction of the vehicle 1 is erected on the bottom plate of the curved portion 6Ca of the member 6C. The reinforcing member 43 has a leg portion 43a welded to the bottom plate of the cross member 6C and an upper plate portion 43b close to the bulging portion 4d of the floor panel 4. Bolt holes 43c are formed in the upper plate portion 43b, and nuts 42 are welded and fixedly provided on the lower surface of the upper plate portion 43b so as to coincide with the bolt holes 43c. Then, with the bolt holes 30a, 4e, 43c aligned, the bolts 41 are inserted from above into the bolt holes 30a, 4e, 43c and screwed into the nuts 42, so that the first extension 30 is the floor panel 4 The reinforcing member 43 is also connected to the floor panel 4.

  In the positioning portion 50, pin holes 31a and 4f are formed in the second extending portion 31 and the floor panel portion 4a. A locking member 52 is attached to the pin hole 4f. With the pin holes 31a and 4f aligned, a positioning pin 51 is inserted into the pin holes 31a and 4f from above and locked to the locking member 52. The second extending portion 31 is positioned on the floor panel 4. After positioning the second extending portion 31, the first extending portion 30 is attached. First, by positioning the second extending portion 31, the first extending portion 30 is simply bolted. It becomes possible. The locking member 52 may be omitted, the pin hole 4f may be made smaller, and the positioning pin 51 may be directly inserted into the pin hole 4f to be locked.

The vehicle seat mounting structure 20 described above has the following effects.
The vehicle seat mounting structure 20 includes a portion of the floor panel 4 of the vehicle 1 in which a closed cross section 7 is formed by the floor panel 4 and a cross member 6C disposed below the floor panel 4 and extending in the vehicle width direction. The row seat 2L is attached to the seat base 21 at the lower end of the second row seat 2L. The vertical length of the closed section 7 in the vehicle width direction is longer than the vertical length of the closed section 7 at the center of the seat base 21. A first extending portion 30 extending toward the larger side is provided, and a bolt 41 is inserted into the first extending portion 30 from above and screwed into a nut 42 provided in the closed cross section 7 so that the first extending portion 30 is placed on the floor. An attachment portion 40 to be attached to the panel 4 was provided.

  Accordingly, the floor panel 4 and the cross member 6C, which are the parts to which the first extension portion 30 is attached, are affected by the arrangement of the insulator 23 and the like, and the shape thereof is curved, and the vertical length of the closed section 7 changes in the vehicle width direction. Even when there is a part that is too small (that is, a part where the bolt 41 cannot be inserted in the closed section 7 or a part where there is a possibility that the bolt 41 cannot be inserted), the arrangement of the second row seat 2L is affected. In the mounting portion 40, the bolt insertion space of the bolt 41 inserted into the closed section 7 is sufficiently secured in the mounting portion 40, and the seat base portion 21 of the second row seat 2L can be easily and reliably secured with high mounting strength. It can be attached to the floor panel 4.

  Since the center tunnel portion 4c facing in the front-rear direction is formed in the vehicle width direction center portion of the floor panel 4, and the vertical fuel tank 24 is disposed below the center tunnel portion 4c and the cross member 6C. An arrangement space for the tank 24 can be ensured, and a space for arranging the insulator 23 under the vertical fuel tank 24 can be secured. And by providing the attachment part 40 in the center tunnel part 4c, there exists a part in which the vertical length of the closed section 7 becomes too small in the center tunnel part 4c, but the bolt 41 of the bolt 41 inserted into the closed section 7 is inserted. The mounting portion 40 can be provided so as to ensure a space.

  A reinforcing member 43 having a hat-shaped cross section as viewed from the vehicle front-rear direction is erected on the bottom plate of the curved portion of the cross member 6C below the floor panel portion 4a where the mounting portion 40 is provided, and the upper plate of the reinforcing member 43 Since the nut 42 is fixedly provided on the lower surface of the portion 43b, by attaching the first extending portion 30 to the floor panel portion 4a, the floor panel portion 4a and the cross member 6C are connected by the reinforcing member 43, in particular the cross By reinforcing the curved portion of the member 6C, the strength and rigidity of the floor panel portion 4a and the cross member 6C can be increased, and the mounting strength of the second row seat 2L can be reliably increased.

  The first and second extending portions 30 and 31 are configured to extend from the center of the seat base 21 to both sides in the vehicle width direction, and of the first and second extending portions 30 and 31 on both sides in the vehicle width direction, The lower side of the closed cross section 7 having a larger vertical length (first extending portion 30) is attached to the floor panel 4 by the mounting portion 40, and the closed section 7 has a smaller vertical length (second extending portion 31). Since the positioning portion 50 is provided for positioning the second extending portion 31 on the floor panel 4 through the positioning pins 51, the second extending portion 31 can be reliably positioned on the floor panel 4, and the bolt insertion space can be ensured in the mounting portion 40. Since the first extending portion 30 can be easily and reliably attached to the intended position of the floor panel 4, the attachment property (assembly property) of the second row seat 2 </ b> L can be improved.

  A guide rail 3L2 that is long in the front-rear direction crossing the cross member 6C on the seat base 21 of the second-row seat 2L, and a mounting plate 22 that is fixed to the guide rail 3L2 and has first and second extending portions 30 and 31. Therefore, the sheet base portion 21 of the second row sheet 2L made of a slide sheet can be securely attached to the floor panel portion 4a where the closed section 7 is formed, and the first and second extending portions 30, 31 can be attached. Can be easily provided by fixing the mounting plate 22 to the guide rail 3L2.

  The first extending portion 30 attached to the floor panel 4 by the attaching portion 40 extends to the center side of the second row seat 2L from the guide rail 3L2, and the first extending portion 30 of the floor panel 4 is attached. Since the bulging portion 4d that bulges the portion above the peripheral portion is formed, the first extending portion 30 can be provided in an inconspicuous position covered with the seat body to improve the appearance, In addition, as described above, even when the mounting portion 40 is provided in the center tunnel portion 4c of the floor panel 4, the bolt insertion space can be reliably secured in the mounting portion 40, and the first extending portion 30 is made substantially horizontal. The structure of the mounting plate 22 can be simplified so that it can be extended and attached to the floor panel 4, and the first extending portion 30 can be reliably attached to the floor panel 4.

Next, a modified example in which the above embodiment is partially modified will be described. However, the same reference numerals as those in the above embodiment are given to the same or similar reference numerals.
1] As shown in FIG. 6, the mounting plate 22 fixed to the guide rail 3L2 is disposed at a position slightly shifted to the right side from the vehicle width direction center of the vehicle 1 (center of the tunnel portion 4c of the floor panel 4). Has been. In the vehicle seat mounting structure 20A, in the mounting plate 22, a portion extending rightward from the center portion of the seat base 21 is formed in the first extending portion 30A, and a portion extending leftward is formed in the second extending portion 31A. ing.

  That is, the first extending portion 30A extends to the side where the vertical length of the closed cross section 7 is larger than the vertical length of the closed cross section 7 at the center of the seat base 21 in the vehicle width direction, and is below the first extended portion 30A. The vertical length of the closed cross section 7 on the side becomes larger than the vertical length of the closed cross section 7 on the lower side of the second extending portion 31A, and the closed cross section on the lower side of the first and second extending portions 30A, 31A 7 is attached to the floor panel 4 by the mounting portion 40, and the one having the smaller vertical length of the closed cross section 7 (second extending portion 31A) is fixed to the floor by the positioning portion 50. Positioned on the panel 4. In the figure, the bulging portion 4d and the reinforcing member 43 are omitted, but may be provided.

2] As shown in FIG. 7, when the mounting plate 22 fixed to the guide rail 3L2 is mounted on the flat portion of the floor panel 4, for example, depending on the shape of the cross member 6C, Assume that the length changes in the vehicle width direction. In this vehicle seat mounting structure 20 </ b> B, in the mounting plate 22, the first extending portion 30 extending to the left is attached to the floor panel 4 by the mounting portion 40, and the second extending portion 31 extending to the right is floored by the positioning portion 50. Positioned on the panel 4.

3] As shown in FIG. 8, in this vehicle seat mounting structure 20C, the first extending portion 30C and the second extending portion 31C are configured separately, and the base end portions on the guide rail 3L2 side are respectively provided. It is fixed to the guide rail 3L2 by welding or the like. By fixing the base end portion of the guide rail 3L2 to the side surface of the guide rail 3L2, the installation height of the guide rail 3L2 can be suppressed low. In addition, about the position of the front-back direction of the 1st, 2nd extension parts 30C and 31C, it is the same, However, It is also possible to shift back and forth.

4] As shown in FIG. 9, in the vehicle seat mounting structure 20D, in the mounting plate 22 fixed to the guide rail 3L2, a pair of first extending portions on both sides in the vehicle width direction with respect to the center of the seat base 21 is provided. The first extending portion 30 </ b> D is attached to the floor panel 4 by the attaching portion 40.

In addition, you may change as follows.
5] The reinforcing member 43 may be omitted. In this case, the nut 42 is fixed and held by welding on the lower surface of the floor panel portion 4a where the closed section 7 is formed.
6] The bulging portion 4d may be omitted.
7] When the drive shaft is arranged below the floor panel 4 in addition to the insulator 23, a center tunnel portion 4c is formed in the floor panel 4 due to the influence of various members and parts, and the cross member 6C is curved. Although the portion 6Ca is formed and the vertical length of the closed cross section 7 may change in the vehicle width direction, the vehicle seat mounting structure of the present invention can be similarly applied.

8] The second extending portions 31, 31A, 31C may be omitted.
9] The present invention is not limited to the second-row seat, but when the seat bases of the first-row seat and the third-row seat are attached to the floor panel, and also when the fixed seat is attached to the floor panel, not limited to the slide seat. The vehicle seat mounting structure can be applied.
10] The present invention can be applied to a structure in which a seat is attached to a floor panel in various vehicles other than those disclosed in the embodiments and various vehicles other than automobiles.

It is a perspective view inside a vehicle concerning an example. It is a top view inside a vehicle. It is a perspective view of the principal part containing the vehicle seat attachment structure. It is a perspective view containing the longitudinal cross-section of the vehicle seat attachment structure. It is a longitudinal cross-sectional view of the vehicle seat mounting structure. It is a longitudinal cross-sectional view of the vehicle seat mounting structure according to a modification. It is a longitudinal cross-sectional view of the vehicle seat mounting structure according to a modification. It is a longitudinal cross-sectional view of the vehicle seat mounting structure according to a modification. It is a longitudinal cross-sectional view of the vehicle seat mounting structure according to a modification.

1 Vehicle 2L Second row seat 3L2 Guide rail 4 Floor panel 4c Center tunnel portion 4d Swelling portion 6C Cross member 7 Closed section 20, 20A to 20D Vehicle seat mounting structure 21 Seat base 22 Mounting plates 30, 30A, 30C, 30D First extension part 31, 31A, 31C Second extension part 40 Mounting part 41 Bolt 42 Nut 43 Reinforcement member 43b Upper plate part 50 Positioning part 51 Positioning pin

Claims (6)

Of the vehicle floor panel, attaching Ri by a sheet screwing a substantially horizontal portion of the floor panel portions closed section is formed by the floor panel and the cross member extending disposed the vehicle width direction on the lower side A vehicle seat mounting structure,
The seat base of the lower end portion of the sheet, that is the cross member bottom surface in the vehicle width direction and extending in a curved and downwardly in a direction away from said sheet over preparative base, the center of the upper and lower length of the closed section sheet base Providing an extending portion extending to a side larger than the vertical length of the closed cross section in
The floor panel portion a mounting portion for mounting said extending portion is screwed into a nut provided in the closed plane is inserted along the bolt from above the extending portion in the direction of the vertical length to the floor panel portion A seat mounting structure for a vehicle, which is provided at a substantially horizontal portion of the vehicle. The seat base is a horizontal surface of the floor panel around the floor panel portion. Is disposed at the substantially horizontal portion of the inflating part that has inflated upwards,
The bottom surface of the cross member is curved upward along the expansion portion of the floor panel portion. Part
A portion of the bottom surface of the cross member that is located immediately below the mounting portion is a vehicle width from the seat base. The vehicle seat according to claim 1, wherein the vehicle seat is inclined downward in the direction toward the mounting portion. Mounting structure. When a center tunnel portion facing in the front-rear direction is formed in the vehicle width direction center portion of the floor panel Both, a vertical fuel tank is disposed below the center tunnel portion and the cross member,
The vehicle installation according to claim 2, wherein the attachment portion is provided in the center tunnel portion. Seat mounting structure. The extending portion is configured to extend from the center portion of the seat base to both sides in the vehicle width direction,
Of the extending portions of the vehicle transverse direction both sides, with attached to the floor panel by the mounting portion towards the upper and lower length of the closed section of the lower large, the positioning pins towards the vertical length of the closed section is small The vehicle seat mounting structure according to claim 3 , further comprising a positioning portion that positions the floor panel via the positioning portion. The seat base is composed of a guide rail that is long in the front-rear direction across the cross member, and a mounting plate that is fixed to the guide rail and has the extension .
Causes extends to sheet over preparative center side than the extending portion of the guide rail attached to the floor panel by the mounting portion, the upper side than its peripheral portion of the portion where the extending portion is mounted within the floor panel The vehicle seat mounting structure according to claim 4 , wherein the vehicle seat mounting structure is bulged to the rear. The height of the closed section below the positioning portion is the height of the closed section below the seat base. 6. The vehicle seat mounting structure according to claim 5, wherein the vehicle seat mounting structure is larger.

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