JP2013203351A - Seat fixing structure for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seat fixing structure for a vehicle which is a simple structure and is capable of fixing a vehicle seat to a floor panel more strongly.SOLUTION: A seat fixing structure 100 includes: bolt holes 114b formed at a floor panel 104 of a vehicle; bolts 110b which are fastened to the bolt holes 114b from the vehicle interior side of the floor panel 104 and fix a seat 102 to the floor panel 104; nuts 126 which tighten the bolts 110b from the vehicle exterior side of the floor panel 104; and weld beads 130 formed at all the circumferences of the nuts 126 to embed the boundaries of the nuts 126 and the floor panel 104.

Description

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

  Generally, a vehicle seat is fixed to a floor (floor panel) using bolts. For example, the front seat includes two rows of slide rails below (Patent Document 1). A total of four bolts are used at each end of the slide rail, whereby the front seat is fixed to the floor panel. In the seat mounting structure described in Patent Document 1, a seat mounting bracket is installed between the front end of the slide rail and the floor panel mainly for the purpose of improving the mounting strength, and bolts are installed in the region of the seat mounting bracket. I use it.

JP 2006-321367 A

  A nut is fixed to the back surface of the seat mounting bracket described in Patent Document 1, and the seat is fixed to the floor panel by screwing a bolt into the nut. Normally, a welding nut is used as such a nut. The strength of the welding nut also affects the mounting strength of the seat, but Patent Document 1 does not particularly mention the strength of the nut fixing to the floor panel.

  Further, as a measure for improving the strength of the weld nut, for example, it is conceivable to improve the vehicle body strength by sandwiching a plate member between the floor panel and the weld nut. However, this method requires a welding allowance for spot welding to the floor panel on the plate member itself, and a flat surface as a receiving surface for the plate member is also required on the other floor panel side. The area where the welding nut can be installed is limited.

  The present invention has been made in view of such a problem, and an object thereof is to provide a vehicle seat fixing structure that has a simple structure and can more firmly fix a vehicle seat to a floor panel.

  In order to solve the above problems, a typical structure of a vehicle seat fixing structure according to the present invention includes a bolt hole formed in a vehicle floor panel, and a floor hole fastened to the bolt hole from the vehicle interior side of the floor panel. A bolt for fixing the seat to the panel, a nut for tightening the bolt from the outside of the floor panel, and a weld bead formed all around the nut to fill the boundary between the nut and the floor panel To do.

  According to the said structure, a sheet | seat can be fixed more firmly with respect to a floor panel. Therefore, it is possible to improve the durability against a load applied to the seat and, in addition, increase the vibration absorption efficiency during traveling to improve the comfort performance.

  The floor panel has a center tunnel that is convex toward the vehicle inner side in the vehicle longitudinal direction at the center in the vehicle width direction, and the vehicle seat fixing structure further has a center tunnel shape on the vehicle outer side of the center tunnel. A tunnel reinforcement panel attached along the bolt hole may be provided through the center tunnel and the tunnel reinforcement panel.

  The center tunnel not only has a propeller shaft arranged on the outside of the vehicle, but also contributes to the improvement of the bending rigidity of the floor panel by drawing a convex shape. In addition, a tunnel reinforcing panel is often attached to the outside of the center tunnel, and the center tunnel has high rigidity. Therefore, in the above configuration, the mounting rigidity of the seat can be further increased by performing bolt fastening in the center tunnel.

  Said tunnel reinforcement panel may have the bulging part which has the convex shape toward the vehicle outer side in the area | region close | similar to a nut. By providing such a bulging portion, the rigidity of the tunnel reinforcing panel is improved, and consequently the strength of the nut can be reinforced. Further, the nut installation location itself is not restricted, which is preferable. Note that the bulging portion is not limited to the tunnel reinforcing panel, and may be provided on the floor panel.

  According to the above configuration, it is possible to provide a vehicle seat fixing structure that has a simple structure and can more firmly fix the vehicle seat to the floor panel.

It is the figure which showed the outline | summary of the vehicle seat fixing structure concerning embodiment of this invention. It is an exploded view of the floor panel of FIG. It is the figure which illustrated the back side of the center tunnel and tunnel reinforcement panel of FIG. It is the figure which illustrated the said sheet attachment structure after the attachment of the sheet | seat corresponding to the AA cross section of FIG.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in the embodiments are merely examples for facilitating understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are denoted by the same reference numerals, and redundant description is omitted, and elements not directly related to the present invention are not illustrated. To do.

  FIG. 1 is a view showing an outline of a vehicle seat fixing structure according to an embodiment of the present invention. The seat 102 illustrated in FIG. 1 is intended for the front right side of the vehicle. The vehicle seat fixing structure of the present embodiment (hereinafter, fixing structure 100) is intended to more firmly fix the seat 102 to the floor panel 104.

  The seat 102 includes two slide rails 106 and 108 at the bottom and a total of two at both ends in the vehicle width direction. Taking the slide rail 106 as an example, the slide rail 106 includes an upper rail 106 a that is integrally fixed to the lower portion of the seat 102, and a lower rail 106 b that is fixed to the floor panel 104. Among these, the lower rail 106b is being fixed to the floor panel 104 with the volt | bolt 110a * 110b in the both ends of the vehicle front-back direction. Each bolt is used at both ends of each of the lower rails 106b and 108b. In the fixing structure 100, a total of four bolts (bolts 110a to 110d) are used.

  The floor panel 104 is provided with bolt holes 114a to 114d for fastening the bolts. More specifically, first, the bolt holes 114a and 114c are provided on both ends of the front cross member 116, respectively. The bolt hole 114d is provided at the end of the rear cross member 118 on the vehicle exterior side. The bolt hole 114 b is provided in the center tunnel 120.

  The center tunnel 120 is an area for arranging a propeller shaft (not shown) on the vehicle outer side (vehicle bottom side). The center tunnel 120 has a convex shape on the inner side of the vehicle, and is provided so as to extend in the vehicle front-rear direction. The center tunnel 120 not only serves as a region where the propeller shaft is arranged, but also contributes to an improvement in the bending rigidity of the entire floor panel 104 because the sectional moment is high due to the convex shape.

  FIG. 2 is an exploded view of the floor panel 104 of FIG. In FIG. 2, the cross members 116 and 118 of FIG. 1 are omitted. As illustrated in FIG. 2, the floor panel 104 includes panels 122 a and 122 b and the center tunnel 120, and a tunnel reinforcing panel 124 that reinforces the center tunnel 120. The bolt hole 114b described above is provided through the center tunnel 120 and the tunnel reinforcing panel 124.

  FIG. 3 is a view illustrating the back side (the vehicle outer side) of the center tunnel 120 and the tunnel reinforcing panel 124 of FIG. As illustrated in FIG. 3A, the tunnel reinforcing panel 124 has a shape that follows the shape of the center tunnel 120 on the outside of the vehicle, and is attached thereto mainly by welding. As a result, the center tunnel 120 can exhibit high rigidity.

  FIG. 3B is a partially enlarged view of FIG. As illustrated in FIG. 3B, a nut 126 for tightening the bolt 110 b (see FIG. 1) is installed on the vehicle exterior side of the tunnel reinforcing panel 124. In the fixing structure 100, a weld bead 130 is provided around the nut 126. The weld bead 130 is formed of a welding material in carbon dioxide arc welding (CO2 welding). The weld bead 130 is formed all around the nut 126.

  FIG. 4 is a diagram illustrating the seat mounting structure after the seat 102 corresponding to the AA cross section of FIG. 3 is mounted. As illustrated in FIG. 4, since the weld bead 130 fills the boundary with the tunnel reinforcement panel 124 all around the nut 126 and firmly joins them, the sheet 102 is fixed to the floor panel 104. The firm fixation of is realized. In particular, in the fixing structure 100, the mounting rigidity of the seat 102 is further increased by performing bolt fastening in the center tunnel 120 that originally has high rigidity. As a result, the durability of the seat 102 with respect to a load or the like is improved, and in addition, the vibration absorption efficiency during traveling is enhanced, so that the comfort performance is also improved.

  Further, the tunnel reinforcing panel 124 is provided with bulged portions 128 a and 128 b that are convex outward from the vehicle (downward in the drawing) in a region close to the nut 126. By providing the bulging portions 128a and 128b, the rigidity of the tunnel reinforcing panel 124 can be improved, and consequently the strength of the nut 126 can be reinforced. Further, the bulging portions 128a and 128b are preferably provided at positions close to the nut 126, and no restriction is imposed on the installation location of the nut 126 itself. In addition, not only a tunnel reinforcement panel but a bulging part may be provided also in a floor panel.

  As described above, in this embodiment, since the weld bead 130 is formed and reinforced around the nut 126 by carbon dioxide arc welding, the welding allowance necessary for reinforcement by a plate member as in the prior art is required. There is no need to secure a flat area. Therefore, there is no shape restriction when the nut 126 is installed.

  As mentioned above, although preferred embodiment of this invention was described referring an accompanying drawing, it cannot be overemphasized that this invention is not limited to the example which concerns. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are naturally within the technical scope of the present invention. Understood.

  The present invention can be used as a vehicle seat fixing structure for fixing a vehicle seat to a floor panel.

DESCRIPTION OF SYMBOLS 100 ... Fixed structure, 102 ... Seat, 104 ... Floor panel, 106 * 108 ... Slide rail, 106a * 108a ... Upper rail, 106b * 108b ... Lower rail, 110a-110d ... Bolt, 114a-114d ... Bolt hole, 116 * 118 ... Cross member, 120 ... center tunnel, 122a and 122b ... panel, 124 ... tunnel reinforcement panel, 126 ... nut, 128a and 128b ... bulge, 130 ... weld bead

Claims (3)

Bolt holes formed in the vehicle floor panel;
A bolt that is fastened to the bolt hole from the inside of the floor panel to fix the seat to the floor panel;
A nut for tightening the bolt from the outside of the floor panel,
A vehicle seat fixing structure, comprising: a weld bead formed around the nut so as to fill a boundary between the nut and the floor panel. The floor panel has a center tunnel that is convex toward the inside of the vehicle over the vehicle longitudinal direction at the center in the vehicle width direction,
The vehicle seat fixing structure further includes a tunnel reinforcing panel attached along the shape of the center tunnel to the outside of the center tunnel,
The vehicle seat fixing structure according to claim 1, wherein the bolt hole is provided through the center tunnel and the tunnel reinforcing panel.   The vehicle seat fixing structure according to claim 2, wherein the tunnel reinforcing panel has a bulging portion that protrudes outward from the vehicle in a region close to the nut.

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