JP2001150985A - Leg structure for seat sliding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seat sliding device having improved versatility and safety. SOLUTION: A leg 10 whose rigidity is set to be lowered by forming a pair of reinforcing members 16 to be enlarged can be buckled and deformed in the direction of the center of a seat only under specified input loading or higher. With buckling and deformation of the leg 10 in the direction of the center of the seat, a guide rail 12 can be tilted to the right and left sides of an input load.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a leg structure of a seat slide device for supporting a guide rail of a seat slide device fixedly on a floor.

[0002]

2. Description of the Related Art As shown in FIG. 4, a seat slide device 118 mounted on a so-called slide seat such as a front seat of an automobile generally has a general structure.
Runner to which the seat is fixed (also called upper rail) 12
0 is slidably attached to a guide rail (also referred to as a lower rail) 112 fixed to a floor surface 114 in the front-rear direction via rollers 122 and rolling elements such as steel balls 124.

In this type of seat slide device 118, a guide rail 112 is formed with a slit-like opening 126 extending in the longitudinal direction on an upper surface thereof, and a base 120a of the guide rail 112 is inserted into the guide rail. The extended piece 120b of the runner 120 thus extended extends upward through the upper surface opening. A seat (not shown) is connected to and fixed to the extension piece 120b of the runner via a bracket or the like, and is guided by front and rear legs 110 fixedly provided at the front and rear ends, respectively. Rails 114
It is fixed to.

[0004] As the legs, especially the rear legs 110,
As shown in the drawing, a stepped shape integrally provided with a guide rail side fixing portion 110-1 on which the guide rail 112 is mounted and fixed, and a floor surface fixing portion 110-2 grounded and fixed to the floor surface 114. Are generally known. And this shape leg
In 110, stiffening pieces 116 also serving as guides for disposing the guide rails 112 are erected on the right and left sides of the base 110a under upward bending, and the stiffening pieces enhance the rigidity. It has been done.

[0005]

By the way, in a front seat of an automobile, as shown in FIG. 4, a belt anchor to which a seat belt is connected, for example, a buckle 128 into which a tongue of the seat belt is inserted is provided with a seat. The slide device is fixedly arranged on the extending piece 120b of the runner 120. And this buckle (belt anchor) 128
In an emergency or the like, the seat is pulled diagonally upward (in the direction of arrow F) near the center of the seat under an excessive load acting on the seat belt from a seated person. A force for tilting in the direction (rightward in the figure) is applied from the buckle.

[0006] As described above, the leg 110 of the seat slide device is usually formed in a form having high rigidity. That is, in this known configuration, the runner 120 tends to tilt in the seat center direction under an excessive load (input load F) with respect to the guide rail 112 held firmly against the floor surface 114. The input load may possibly act intensively on the outer opening end 126a of the upper opening 126 of the guide rail.

Further, a force for tilting the guide rail 112 with respect to the leg 110 having high rigidity, that is, an input load F
Is likely to be concentrated on the rivet 132 for fixing between the guide rail and the leg. Therefore, depending on the degree of the input load, the possibility that the guide rail is separated from the leg cannot be denied.

[0008] Therefore, in order to further enhance the safety of the guide rail, usually, enhancement of the holding force on the runner by increasing the thickness of the guide rail, or enhancement of the fixing force on the guide rail by welding or the like is performed. With these, the safety of the guide rail and, consequently, the seat slide device is further enhanced. However,
The former thickening of the guide rails requires the guide rails to be larger and heavier, and the latter requires more complicated fixing work by welding, etc. In view of this, it is difficult to say that these are all versatile safety enhancement measures.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a leg structure of a seat slide apparatus which is excellent in general versatility and can enhance safety with respect to the seat slide apparatus.

[0010]

According to one embodiment of the present invention, the leg is reduced in rigidity by setting the pair of stiffening pieces to have an expanded shape. , Only under an input load above a specific load,
Buckling deformation is possible at least in the left-right direction. The buckling deformation of the leg in the left-right direction enables the guide rail to be tilted in the left-right direction of the load input.

[0011]

Embodiments of the present invention will be described below in detail with reference to the drawings.

As shown in FIGS. 1 and 2, in the leg structure of the seat slide device according to the present invention, the leg 10
However, the guide rail 12 is mounted and fixed, and the guide rail side fixing portion 10-1 and the floor surface fixing portion 10-2 fixed to the floor 14 are integrally provided, for example, bent into a step shape. Is formed. The leg 10 is formed into a so-called rigidity-enhanced form in which stiffening pieces 16 also serving as placement guides of the guide rails 12 are erected on the left and right sides of the base 10a under upward bending. Is formed.

Here, an outline of the seat slide device 18 provided with the legs 10 will be described. As can be seen from FIG. 1, the seat slide device 18 includes, for example, a runner (also referred to as an upper rail) 20 with respect to a guide rail (also referred to as a lower rail) 12 via rollers such as rollers 22 and steel balls 24. It is formed by assembling slidably in the front-back direction.

In this type of seat slide device 18, the guide rail 12 is usually formed in a hollow shape having a slit-like opening 26 extending in the longitudinal direction on its upper surface (see FIG. 2). Within its base 20a
The extension piece 20b of the runner 20 which is interposed is extended upward through the upper surface opening. A seat (not shown) is connected to and fixed to the extension piece 20b of the runner via a bracket or the like, and is guided through front and rear legs 10 fixedly provided at the front and rear ends, respectively. The rail 12 is fixed to the floor 14.

The configuration of the seat slide device 18 is well known, and the seat slide device itself is not the purpose of the present invention, and thus will not be described in detail here.

A stepped leg 10 as shown in FIG.
Is usually provided on the rear side of the guide rail 12 and is fixed to the floor surface 14 in combination with a front leg (not shown) bent in a substantially rectangular shape. .

As shown in FIG. 1, in this type of seat slide device 18, a belt anchor to which a seat belt is connected, for example, a buckle 28 into which a tongue of the seat belt is inserted is attached to an extension piece of the runner. 20b is fixedly arranged. Then, this buckle (belt anchor) 28 is used to prevent excessive input load in an emergency or the like.
Under an input load exceeding a specific load, the seat is pulled diagonally upward (in the direction of arrow F) near the center of the seat, so in an emergency, etc., the force to incline toward the seat center (right in the diagram) The buckle will act on the runner 20.

Here, the stiffening walls 16 provided on the left and right sides of the base 10a of the leg are usually erected at an upright position. Conventionally, the leg 10 is erected at the upright position. To maximize the rigidity. However, in the present invention, attention is paid to the fact that the degree of the rigidity enhancement is reduced by inclining the protection piece 16 outward, that is, by inclining it in the expanding direction, and as can be seen from FIGS.
In the present invention, the rigidity of the leg 10 is reduced by forming the pair of stiffening pieces in an expanded shape.

That is, in the present invention, by setting the rigidity of the leg 10 to be reduced by forming the pair of stiffening pieces 16 into an expanded shape, the leg is subjected to an input load exceeding a specific load, that is, an excessive load in an emergency or the like. Only under an input load, buckling deformation is possible at least in the left-right direction, and further in the seat center direction (right side in the figure) as the load input direction. The buckling deformation of the leg 10 in the seat center direction allows the guide rail 12 and thus the entire seat slide device 18 to be tilted in the load input direction.

In such a configuration, for example, when an excessive input load is input to the runner 20 from the buckle 28 in an emergency or the like, the leg 10 buckles under the excessive input load, and the buckling deformation occurs. With the inclination of the guide rail side fixing portion 10-1 accompanying the above, the guide rail 12, and thus the entire seat slide device 18 are inclined toward the seat center as shown in FIG.

In the tilted state of the seat slide device 18, the input direction of the excessive load (the direction of arrow F) is the guide rail 12 and the base of the guide rail side fixing portion 10-1 which is the fixing surface of the guide rail. Since the input load substantially coincides with the vertical direction with respect to 10a, concentration of the input load on the outer opening end 26a of the upper surface opening 26 of the guide rail or the rivet 32 can be reliably avoided. 14 enough and surely escaped. That is, the input load from the buckle 28 is smoothly released to the floor 14 via the leg 10 via the runner 20 and the guide rail 12,
Deformation of the guide rail and breakage or damage of the rivet 32 can be reliably prevented, thereby further enhancing the safety of the guide rail and the seat slide device 18 in an emergency or the like.

According to the structure of the present invention, it is sufficient to make the stiffening wall 16 of the leg in an expanded shape, and the guide rail is not increased in size and weight, and the structure is not complicated. Further enhanced safety that is excellent in versatility without increasing the cost can be easily and reliably performed on the seat slide device 18.

In the embodiment of the present invention, the stiffening piece
16 is simply a simple widening shape with a different bending angle at the root. In other words, the base portion of the stiffening piece 16 is left with a width that allows the guide rail 12 to be sandwiched from the left and right sides, so that the arrangement guide function for the guide rail is not impaired. Therefore, further enhanced safety with excellent versatility can be easily secured without lowering workability.

In the structure of the present invention, the leg
Since only the seat slide device 18 is tilted toward the seat center by buckling deformation of only 10, even after an excessive load is input in an emergency or the like, the operation, that is, the slide of the seat slide device, Can be properly secured. In other words, after the load is input, the seat can easily be retracted to a position where the occupant can easily escape and rescue, so that the occupant can easily escape and rescue after an emergency such as a front collision. According to this, you can be sure.

Here, in the embodiment of the present invention, the stiffening pieces 16 on both the left and right sides of the base 10a have an expanded shape. However, the buckling deformation of the leg 10 in the direction of the input load from the seat belt (the direction of arrow F in FIGS. 1 and 3), that is, in the direction of the seat center, causes the guide rail 1 to move.
2.Since it is sufficient to incline the seat slide device 18 and thus, the present invention is not limited to this.For example, only the stiffening piece on the seat center side is made to have an expanded shape, thereby setting the rigidity reduction on the seat center side. You may.

Even in such a configuration, the seat slide device moves in the load input direction, that is, in the seat center direction, under the buckling deformation of the leg 10 toward the seat center.
Since the tilting of 18 can be reliably obtained, the same effect as that of the above-described embodiment, which is more versatile and can further enhance safety with respect to the seat slide device, can be sufficiently secured from this configuration.

In the embodiment of the present invention,
Although the rear leg is illustrated, it goes without saying that the present invention can be applied to the front leg.

Further, the leg structure of the seat slide device of the present invention is suitable for a seat slide device mounted on a seat of an automobile, particularly a front seat, but is not limited thereto, and a seat belt anchor is fixedly disposed. As long as the seat slide device is configured, the present invention can be sufficiently applied to a rear seat of an automobile or a seat of another vehicle such as a passenger aircraft.

The embodiments described above are intended to explain the present invention, and do not limit the present invention in any way, and all modifications and alterations within the technical scope of the present invention are also included in this embodiment. It goes without saying that it is included in the invention.

[0030]

As described above, according to the leg structure of the seat slide device according to the present invention, the seat slide device can be reliably and easily tilted in the load input direction. Then, by tilting the seat slide device in the load input direction, the guide rail and the vertical direction of the guide rail side fixing portion base can be substantially matched with the load input direction, and the outer opening end of the upper surface opening of the guide rail, or Since the concentration of the input load on the rivet can be reliably avoided,
By preventing deformation of the guide rail and breakage or damage of the rivet, the safety of the guide rail and, consequently, the seat slide device in an emergency or the like can be further enhanced.

According to the structure of the present invention, it is sufficient to make the stiffening wall of the leg an expanded shape, and it is not necessary to increase the size and weight of the guide rail and to complicate the structure. Further enhancement of safety with excellent easiness can be easily and reliably achieved for the seat slide device. In addition, since the stiffening wall does not impair the function of arranging the guide rails with respect to the guide rails, it is possible to reliably prevent a reduction in workability.

Further, since only the leg is buckled and deformed, the seat slide device is merely tilted in the corresponding direction. Therefore, even after an excessive load is input in an emergency or the like, the operation, that is, the seat slide is performed. The slide of the device can be properly secured. In other words, after the load is input, the seat can easily be retracted to a position where the occupant can easily escape and rescue, so that the occupant can easily escape and rescue after an emergency such as a front collision. According to this, you can be sure.

[Brief description of the drawings]

FIG. 1 is a schematic rear view of a leg structure of a seat slide device according to the present invention, which is partially broken in a normal state.

FIG. 2 is a schematic exploded perspective view of a guide rail and legs showing a leg structure of the seat slide device.

FIG. 3 is a schematic rear view similar to FIG. 1 of a leg structure of the seat slide device when a load is input.

FIG. 4 is a schematic rear view similar to FIG. 1 of a leg structure of the seat slide device, showing a conventional configuration.

[Explanation of symbols]

 10 Leg 12 Guide rail 16 Stiffening piece 18 Seat slide device 20 Runner 28 Buckle (belt anchor)

Continued on the front page (72) Inventor Takeshi Ishikawa 3-2-1, Matsubaracho, Akishima-shi, Tokyo F-term in Tachi-S Co., Ltd. (reference) 3B087 BA02 BB03 DE10

Claims (2)

[Claims] 1. A pair of guide rail-side fixing portions, on which a guide rail is placed and fixed, and a floor-side fixing portion, which is grounded and fixed to a floor surface, are integrally provided, and also serve as a guide rail arrangement guide. The stiffening piece is a leg of the seat slide device erected on the left and right sides of the base under upward bending, and the rigidity of the leg by forming a pair of stiffening pieces in an expanded shape. The lowering setting allows the leg to buckle in at least its left and right direction only under an input load equal to or greater than the specified load. The leg structure of the seat slide device that can be tilted to any angle. 2. A pair of guide rail mounting portions, on which a guide rail is mounted and fixed, and a floor surface fixing portion, which is grounded and fixed to the floor surface, are integrally provided, and a pair of guide rails is also provided. The stiffening piece is a leg of the seat slide device erected on the left and right sides of the base under the upward bending, and the stiffening piece located at the center side of the seat has an expanded shape. Due to the lower leg rigidity setting on the side
The leg can be buckled and deformed at least in the corresponding direction only under an input load exceeding a specific load, and the guide rail can be tilted toward the center of the seat by buckling deformation of the leg in the corresponding direction. Leg structure of the seat slide device.