JP6938097B2 - Seat rail mounting structure - Google Patents

Description

The present invention relates to a seat rail mounting structure for mounting a seat rail on which a vehicle seat is mounted in a vehicle such as an automobile.

As an example of the prior art regarding the seat rail mounting structure, there are structures as shown in FIGS. 3 and 4.
In this structure, front and rear seat anchor brackets 3, 3'formed in a pedestal shape are provided on the vehicle body floor 5. On the other hand, a rail bracket 2 is welded to the front end portion of the seat rail 1 extending in the front-rear direction of the vehicle and on which the vehicle seat 8 is placed, and a part thereof is an extending portion 22 extending forward of the seat rail 1. It is said that. As shown in FIG. 4, the extension portion 22 is placed on the upper surface portion of the seat anchor bracket 3 on the front side, and is fastened to this portion by using bolts 6. The bolt fastening location is a position offset from the seat rail 1 by an appropriate distance L in the vehicle width direction. The mounting structure of the rear portion of the seat rail 1 with respect to the rear seat anchor bracket 3'is the same as described above.

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

First, since the bolt fastening portion of the rail bracket 2 to the seat anchor bracket 3 is offset from the seat rail 1 in the vehicle width direction (the direction intersecting the longitudinal direction of the seat rail 1), the seat rail 1 Since the rail is cantilevered, the occupant of the vehicle seat 8 tends to feel fluffy or feel uncomfortable when cornering. Therefore, the ride quality of the vehicle is uncomfortable.
Secondly, when a front collision of the vehicle occurs, a large load for moving the vehicle seat 8 to the front of the vehicle may be generated, and a force F for moving the vehicle seat 8 forward may be generated. This 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, the seat anchor bracket 3 on the front side may be easily compressed and deformed due to the force F. However, if such a situation occurs, the seat rail 1 may be deformed. There is a problem that the front part bends and deforms so that it sinks. Further, a large stress is also generated at the welded portion between the seat rail 1 and the rail bracket 2, which causes damage to the welded portion and further damage to the rail bracket 2. It is desirable to appropriately prevent such problems.

Japanese Unexamined Patent Publication No. 2013-82384 Japanese Patent No. 3196442

The present invention has been conceived under the above-mentioned circumstances, and is a case where a large force is generated to improve the riding comfort of the vehicle and to bring 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 or breakage of each part.

In order to solve the above problems, the following technical measures are taken in the present invention.

The seat rail mounting structure provided by the present invention extends in the front-rear direction of the vehicle and is joined to a seat rail on which a vehicle seat is placed and a front portion of the seat rail, and a part thereof is formed from the front portion of the seat rail. It has a rail bracket that is an extension part that extends to the front side of the vehicle, and a pedestal-shaped main body part that is provided on the vehicle body floor, and the extension part of the rail bracket is attached to the upper surface part of this main body part. It is a seat rail mounting structure including a seat anchor bracket to be fixed, and mounting and fixing of the extension portion of the rail bracket to the main body portion of the seat anchor bracket is performed on the vehicle front side of the seat rail. It is planned at the position, and the rear wall portion of the main body portion of the seat anchor bracket has a convex shape protruding toward the rear side of the vehicle from the other portion of the rear wall portion, and is arranged in a series in the vertical height direction. An extending vertical bead portion is provided, and the vertical bead portion has substantially the same height as the main body portion, and the seat rail is located above both the main body portion and the vertical bead portion. It is characterized by.

According to such a configuration, the following effects can be obtained.
First, since the mounting and fixing position of the rail bracket with respect to the seat anchor bracket is on the extension line in the longitudinal direction of the seat rail, it is possible to firmly fix the long seat rail. Therefore, it is possible to improve the riding comfort of the vehicle by preventing the seated person on the vehicle seat from feeling fluffy or feeling uncomfortable.
Secondly, since the strength of the seat anchor bracket is improved by the vertical bead portion, the seat anchor bracket is easy to use when a large force is generated to bring the vehicle seat forward when the vehicle hits the front. It can be prevented from being compressed and deformed. Therefore, it is possible to appropriately prevent the front portion of the seat rail from being deformed so as to sink due to the compression deformation of the seat anchor bracket. In addition, problems such as a joint between the seat rail and the rail bracket and the rail bracket being easily damaged can be solved.
Thirdly, since the rail bracket is supported not only by the upper part of the main body of the seat anchor bracket but also by the upper part of the vertical bead part, the amount of overlap between the seat rail and the seat anchor bracket is increased, and the seat rail The support state can be made more stable. This can bring about the effect that the seat rail is less likely to be bent and deformed when a downward force is generated on the front portion of the seat rail.
Fourth, since the vertical bead portion is used as a means for increasing the amount of overlap between the seat rail and the seat anchor bracket, it is possible to eliminate the need to increase the overall size of the main body portion of the seat anchor bracket. can. As a result, it is possible to appropriately suppress an increase in weight and an increase in manufacturing cost.

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

(A) is a cross-sectional view of a main part showing an example of a seat rail mounting structure according to the present invention, and (b) is a plan view of the main part of (a). It is a schematic perspective view of the seat anchor bracket used in the seat rail mounting structure shown in FIG. It is a side sectional view which shows an example of the prior art. It is a top view of the main part of FIG.

Hereinafter, preferred embodiments of the present invention will be specifically described with reference to the drawings.
For ease of understanding, the same or similar elements as those in the prior art shown in FIGS. 3 and 4 are appropriately designated by the same reference numerals as those in the prior art.

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 for the front portion of the seat rail 1. The present invention does not cover the mounting structure of the rear portion of the seat rail 1, but this point will be described later. Further, two seat rails 1 are provided in parallel in the vehicle width direction to form a set of two seat rails 1, but the mounting structure of each seat rail 1 is the same. Therefore, in the following description, the mounting structure of the seat rail 1 on one side will be described.

The seat rail 1 supports a vehicle seat (not shown) in a slide-adjustable manner, has a substantially C-shaped cross section of the upper surface opening, and extends uniformly in the front-rear 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, has a substantially U-shaped cross section of the upper surface opening, and has a bottom plate portion 20 and both sides of the bottom plate portion 20 in the vehicle width direction. It includes a pair of left and right side plate portions 21 that stand upward from the edge portion. 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 portion 22 extending toward the front side of the vehicle 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 portion 3A, a plurality of mounting flange portions 32, and at least one (two in this embodiment) vertical beads. It includes a section 33 (see also FIG. 2). The main body portion 3A has a pedestal shape having an upper wall portion 30 and an upright peripheral wall portion 31 connected to the upper wall portion 30. Specifically, the plurality of mounting flange portions 32 include a plurality of lower flange portions 32 (32a) that are continuously provided under the peripheral wall portion 31 and welded to the vehicle body floor 5, and the peripheral wall portion 31. A vertical flange portion 32 (32b) that is connected to the side edge portions of the front wall portion 31a and the rear wall portion 31b and is welded to the side sill portion 50 is provided.

The vertical bead portion 33 is integrally formed with the rear wall portion 31b, has a convex shape protruding toward the rear side of the vehicle as compared with other portions of the rear wall portion 31b, and extends in a 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 these upper surface portions 3a and 33a are connected substantially in a plane.

The rail bracket 2 has an extension portion 22 mounted on the upper surface portion 3a of the seat anchor bracket 3, and is attached and fixed to the seat anchor bracket 3 by using a bolt insertion hole 39 and a bolt 6 inserted therein. There is. The front portion of the seat rail 1 is placed on the upper surface portion 3a of the main body portion 3A of the seat anchor bracket 3 via the rail bracket 2, but of the two vertical bead portions 33, one of the vertical bead portions 33 It is also located 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 described above will be described.

First, the bolt fastening position of the rail bracket 2 with respect to the seat anchor bracket 3 is on an extension line in the longitudinal direction of the seat rail 1, and is not offset in the vehicle width direction. Therefore, it is possible to firmly fix the long seat rail 1 so that the seater on the vehicle seat does not feel a so-called fluffy feeling or a feeling of strangeness close to this, and the ride comfort of the vehicle is improved. It can be good.

Next, when a front collision of the vehicle occurs, a force is generated to raise 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, so that compression deformation is unlikely to occur. Therefore, it is appropriately prevented that the seat anchor bracket 3 is greatly compressed and deformed by the above-mentioned force, and the seat rail 1 is deformed so as to be sunk accordingly. Further, it is possible to prevent a large stress from acting on the welded portion between the seat rail 1 and the rail bracket 2 and prevent the welded portion from being damaged (weld breakage). 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. Therefore, the amount of overlap between the seat rail 1 and the seat anchor bracket 3 can be increased, and the supported state of the seat rail 1 can be made more stable. Further, if the overlap amount is increased, the seat rail 1 is less likely to be bent and deformed when a downward force is generated on the front portion of the seat rail 1.

In addition, unlike the conventional rail bracket 2 shown in FIG. 4, the rail bracket 2 does not need to have a shape that greatly protrudes to the side of the seat rail 1 (in the vehicle width direction), so the size of the rail bracket 2 can be reduced. Can be planned. Regarding the seat anchor bracket 3, the vertical bead portion 33 is used to improve the strength and stabilize the seat rail 1, and it is not necessary or less necessary to increase the size of 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 above-described embodiments. The specific configuration of each part of the seat rail mounting structure according to the present invention can be variously redesigned within the scope intended by the present invention.

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

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

Claims (1)

A seat rail that extends in the front-rear direction of the vehicle and on which the vehicle seat can be placed,
A rail bracket that is joined to the front part of the seat rail and has a part that extends from the front part of the seat rail to the front side of the vehicle.
A seat anchor bracket that has a pedestal-shaped main body provided on the vehicle body floor, and the extension portion of the rail bracket is attached and fixed to the upper surface of the main body.
It is a seat rail mounting structure equipped with
The extension portion of the rail bracket is attached and fixed to the main body portion of the seat anchor bracket at a position on the front side of the vehicle of the seat rail.
The rear wall portion of the main body portion of the seat anchor bracket is provided with a vertical bead portion which is convex and extends in a series in the vertical height direction so as to protrude toward the rear side of the vehicle with respect to the other portion of the rear wall portion. And
The seat rail mounting structure is characterized in that the vertical bead portion has substantially the same height as 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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