JP2019119312A - Seat rail attachment structure - Google Patents

Abstract

To provide a seat rail attachment structure which can make a riding comfort of a vehicle favorable, and can effectively prevent the occurrence of large displacement and damage at each part even if a large force for bringing a vehicle seat into a frontward fall state is generated.SOLUTION: An extension part 22 of a rail bracket 2 is attached and fixed to a main body part 3A of a seat anchor bracket 3 in a position of a vehicle front side of a seat rail 1. A vertical bead part 33 protrusively protruded to a vehicle rear side rather than the other portion of a rear wall part 31b, and serially extending to a vehicle height direction is arranged at the rear wall part 31b of the main body part 3A of the seat anchor bracket 3, a height of the vertical bead part 33 is set substantially the same as a height of the main body part 3A, and the seat rail 1 is located at an upper side of both the main body part 3A and the vertical bead part 33.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a seat rail mounting structure for mounting a seat rail on which a vehicle seat can be mounted in a vehicle such as a car.

As an example of the prior art regarding a seat rail attachment structure, there exists a structure as shown to FIG. 3 and FIG.
In this structure, front and rear seat anchor brackets 3 and 3 ′ formed in a pedestal shape are provided on the vehicle body floor 5. On the other hand, the rail bracket 2 is welded to the front end of the seat rail 1 which extends in the longitudinal direction of the vehicle and on which the vehicle seat 8 is placed, and a part thereof extends to the front of the seat rail 1 It is assumed. As shown in FIG. 4, the extension portion 22 is placed on the upper surface portion of the front side seat anchor bracket 3, and is fastened to this portion using a bolt 6. The bolt fastening point is a position offset from the seat rail 1 by a suitable distance L in the vehicle width direction. The attachment structure of the rear of the seat rail 1 to the rear seat anchor bracket 3 'is the same as that described above.

  However, in the above-mentioned prior art, as will be described next, there is still room for improvement.

First, the bolt fastening point of the rail bracket 2 to the seat anchor bracket 3 is a position offset from the seat rail 1 in the vehicle width direction (direction intersecting the longitudinal direction of the seat rail 1). However, when the vehicle is cornering and the like, the seat occupant of the vehicle seat 8 is likely to feel fluffy or feel a sense of discomfort close to this. Therefore, the ride comfort of the vehicle is poor.
Second, when a front collision of a vehicle occurs, a large load may be generated to move the vehicle seat 8 to the front of the vehicle, and a force F may be generated to move the vehicle seat 8 forward. The force F is a force that raises the rear side of the vehicle seat 8 in the direction indicated by the arrow Na and lowers the front side of the vehicle seat 8 in the direction indicated by the arrow Nb. When such a force F is generated, there is a possibility that the front side seat anchor bracket 3 may be easily compressed and deformed due to the force F. However, if such a situation occurs, the seat rail 1 A defect occurs in which the front part is bent and deformed so as to sink. In addition, a large stress is also generated in the welded portion between the seat rail 1 and the rail bracket 2, and the welded portion may be damaged, and furthermore, the rail bracket 2 may also be damaged. It is desirable to prevent such problems properly.

JP, 2013-82384, A Patent No. 3196442

  The present invention has been conceived under the circumstances as described above, and can improve the ride comfort of the vehicle and generate a large force to move the vehicle seat forward. However, it is an object of the present invention to provide a seat rail mounting structure capable of effectively preventing large deformation and breakage in each part.

  In order to solve the above problems, the present invention takes the following technical measures.

  A seat rail mounting structure provided by the present invention includes a seat rail extending in the longitudinal direction of the vehicle and on which a vehicle seat is mounted, and a front portion of the seat rail joined from a front portion of the seat rail It has a rail bracket which is an extension extending to the front of the vehicle, and a pedestal-like main body provided on a vehicle floor, and the extension of the rail bracket is attached to the upper surface of the main body. A seat rail mounting structure comprising: a seat anchor bracket to be fixed, wherein the fixing of the extension of the rail bracket to the main body of the seat anchor bracket is performed on the vehicle front side of the seat rail The rear wall portion of the main body portion of the seat anchor bracket projects toward the rear side of the vehicle than other portions of the rear wall portion. The vertical bead portion is provided in a convex shape and extends in the vertical height direction, and the vertical bead portion has substantially the same height as the main body portion, and the seat rail includes the main body portion and the vertical portion. It is characterized in that it is located above both sides of the vertical bead portion.

According to such a configuration, the following effects can be obtained.
First, since the mounting and fixing position of the rail bracket to the seat anchor bracket is on the longitudinal extension of the seat rail, it is possible to firmly fix the long seat rail. Therefore, it is possible to improve the ride comfort of the vehicle, assuming that the occupant seated on the vehicle seat does not feel fluff or a feeling of discomfort close to this.
Second, since the seat anchor bracket is improved in strength by the vertical bead portion, the seat anchor bracket is easy when a large force is generated to try to turn the vehicle seat forward at the time of a front collision of the vehicle. Not be compressed and deformed. For this reason, it is possible to appropriately prevent the front part of the seat rail from being deformed so as to sink in with the compressive deformation of the seat anchor bracket. In addition, it is possible to solve the problem that the joint portion between the seat rail and the rail bracket and the rail bracket are easily damaged.
Third, since the rail bracket is supported not only by the upper portion of the main body of the seat anchor bracket but also by the upper portion of the vertical bead portion, the amount of overlap between the seat rail and the seat anchor bracket is increased. Support can be made more stable. This has the effect of making the seat rail less likely to flex and deform when a downward force is generated at the front of the seat rail.
Fourth, since the vertical bead portion is used as a means to increase the overlap amount between the seat rail and the seat anchor bracket, the need to increase the size of the entire body portion of the seat anchor bracket is eliminated. it can. As a result, it is possible to appropriately suppress an increase in weight, an increase in manufacturing cost, and the like.

  Other features and advantages of the present invention will become more apparent from the description of the embodiments of the present invention given below with reference to the attached drawings.

(A) is principal part sectional drawing which shows an example of the seat rail attachment structure based on this invention, (b) is a principal part top view of (a). It is a schematic perspective view of the seat anchor bracket used for the seat rail attachment structure shown in FIG. It is side surface sectional drawing which shows an example of a prior art. It is a principal part top view of FIG.

Hereinafter, preferred embodiments of the present invention will be specifically described with reference to the drawings.
In order to facilitate understanding, the same or similar elements as or to those of the prior art shown in FIGS. 3 and 4 will be denoted by the same reference numerals as the prior art as appropriate.

The seat rail mounting structure A shown in FIG. 1 includes a seat rail 1, a rail bracket 2, and a seat anchor bracket 3.
The seat rail mounting structure A shown in FIG. 1 is a mounting structure at the front of the seat rail 1. Although the mounting structure of the rear portion of the seat rail 1 is not a technical object in the present invention, this point will be described later. Further, two seat rails 1 are provided in parallel in the vehicle width direction to form a pair of two, but the attachment structure of each seat rail 1 is the same. Therefore, about the following description, the attachment structure is explained for the seat rail 1 on one side only.

The seat rail 1 supports a vehicle seat (not shown) so as to be able to slide and adjust. The seat rail 1 is substantially C-shaped in cross section at the top opening and extends uniformly in the longitudinal direction of the vehicle.
The rail bracket 2 is a member for attaching the front portion of the seat rail 1 to the seat anchor bracket 3 and is substantially U-shaped in cross section at the top opening, and the bottom plate portion 20 and both sides of the bottom plate portion 20 in the vehicle width direction It has a pair of left and right side plate portions 21 which stand upward from the edge. The rail bracket 2 is welded to the front portion of the seat rail 1 so that the bottom plate portion 20 abuts on the lower surface side of the seat rail 1 and the seat rail 1 is sandwiched between the pair of side plate portions 21. There is. However, the front portion of the rail bracket 2 is an extension 22 extending to the vehicle front side of the seat rail 1.

  The seat anchor bracket 3 is fixedly provided on the vehicle body floor 5 (floor panel), and includes a main body 3A, a plurality of mounting flanges 32, and at least one (two in the present embodiment) longitudinal beads. A portion 33 is provided (see also FIG. 2). The main body 3 </ b> A is in the form of a pedestal having an upper wall 30 and an upright peripheral wall 31 connected to the upper wall 30. More specifically, a plurality of lower flange portions 32 (32a) which are continuously connected to the lower portion of the peripheral wall portion 31 and welded to the vehicle floor 5 as the plurality of mounting flange portions 32, and of the peripheral wall portions 31. A longitudinal flange portion 32 (32b) is provided continuously with the side edge portions of the front wall portion 31a and the rear wall portion 31b and welded to the side sill portion 50.

  The vertical bead portion 33 is integrally formed on the rear wall portion 31b, has a convex shape that protrudes toward the vehicle rear side compared to the other portions of the rear wall portion 31b, and extends in series in the vertical height direction There is. The lower portion of the vertical bead portion 33 is connected to the lower flange portion 32 (32a). Further, the height of the upper surface portion 33a of the vertical bead portion 33 is substantially the same as the height of the upper surface portion 3a of the main body portion 3A, and the upper surface portions 3a and 33a are connected substantially flush.

  The extending portion 22 of the rail bracket 2 is placed on the upper surface portion 3a of the seat anchor bracket 3 and fixed to the seat anchor bracket 3 using the bolt insertion holes 39 and the bolts 6 inserted therein. There is. The front portion of the seat rail 1 is mounted on the upper surface portion 3 a of the main body portion 3 A of the seat anchor bracket 3 via the rail bracket 2, but the longitudinal bead portion 33 of one of the two longitudinal bead portions 33 It is located also on the upper surface portion 33a, and has a structure supported by both of these upper surface portions 3a and 33a.

  Next, the operation of the seat rail mounting structure A will be described.

  First, the bolt fastening position of the rail bracket 2 with respect to the seat anchor bracket 3 is on the extension of the seat rail 1 in the longitudinal direction, and is not offset in the vehicle width direction. For this reason, it is possible to fix the long seat rail 1 firmly, so that a person sitting on a vehicle seat does not generate so-called fluffiness or a feeling of discomfort near this, and the ride comfort of the vehicle It is possible to do well.

  Next, when a front collision of the vehicle occurs, a force is generated to lift the rear side of the seat rail 1 and lower the front side as in the case described with reference to FIG. On the other hand, the seat anchor bracket 3 is reinforced by the vertical bead portion 33 and is less likely to cause compressive deformation. Therefore, it is appropriately prevented that the seat anchor bracket 3 is greatly compressed and deformed due to the above-mentioned force, and the seat rail 1 is accordingly deformed so as to sink. In addition, it is possible to prevent a large stress from acting on the welding portion between the seat rail 1 and the rail bracket 2 and to prevent the welding portion from being broken (welding break). Damage to the rail bracket 2 can also be prevented.

  The seat rail 1 is supported not only by the main body portion 3A of the seat anchor bracket 3 but also by the vertical bead portion 33. For this reason, it is possible to make the overlap amount of the seat rail 1 and the seat anchor bracket 3 large, and to make the support state of the seat rail 1 more stable. Further, when the amount of overlap is increased, when a downward force is generated at the front of the seat rail 1, the seat rail 1 becomes more difficult to bend and deform.

  In addition, unlike the conventional one shown in FIG. 4, the rail bracket 2 does not have to be in the form of being greatly extended to the side of the seat rail 1 (in the vehicle width direction). Can be With regard to the seat anchor bracket 3, the longitudinal bead portion 33 is used to improve the strength and stabilize the seat rail 1, and it is not necessary or not necessary to enlarge the entire seat anchor bracket 3. As a result, weight reduction and reduction in manufacturing cost can be suitably promoted.

  The present invention is not limited to the contents of the embodiments described above. The specific configuration of each part of the seat rail mounting structure according to the present invention can be variously designed and changed within the intended scope of the present invention.

In the above embodiment, two vertical bead portions 33 are provided, and only one of the vertical bead portions 33 is disposed on the lower side of the seat rail 1, as understood from this, the present invention In the case where a plurality of vertical bead portions 33 are provided in the seat anchor bracket 3, at least one of the vertical bead portions 33 may be disposed below the seat rail 1. The number and the like of the vertical bead portions 33 are not limited, and the specific shape, size and the like of the vertical bead portions 33 are not limited.
The present invention is directed to a mounting structure on the front side of a seat rail. Therefore, the mounting structure on the rear side of the seat rail may be similar to that of the prior art, or may be similar to the mounting structure of the seat rail according to the present invention. In any case, by applying the present invention to the attachment structure on the front side of the seat rail, it is possible to suitably obtain the intended effect of the present invention.

A Seat rail mounting structure 1 Seat rail 2 Rail bracket 22 Extension (of rail bracket)
3 Seat anchor bracket 3A Main body (of seat anchor bracket)
31b Rear wall (of seat anchor bracket)
33 Vertical bead

Claims (1)

A seat rail which extends in the longitudinal direction of the vehicle and on which a vehicle seat is placed;
A rail bracket joined to a front portion of the seat rail and having a part extending from the front portion of the seat rail to the front side of the vehicle;
A seat anchor bracket having a pedestal-like main body portion provided on a vehicle body floor and to which an extension portion of the rail bracket is attached and fixed on an upper surface portion of the main body portion;
A seat rail mounting structure,
The mounting and fixing of the extension portion of the rail bracket to the main body portion of the seat anchor bracket is achieved at a position on the vehicle front side of the seat rail,
The rear wall portion of the main body portion of the seat anchor bracket is provided with a longitudinal bead portion having a convex shape projecting to the vehicle rear side with respect to the other portion of the rear wall portion and extending in series in the vertical height direction Yes,
A seat rail mounting structure, wherein the vertical bead portion has a height substantially the same as that of the main body portion, and the seat rail is located above both the main body portion and the vertical bead portion.

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