JP6356559B2 - Lower rail - Google Patents

Description

  The present invention relates to a lower rail used in a seat rail device.

  In one-box type rear seats, etc., the base end of the safety belt for two people provided on the seat where two people can sit side by side is one slide rail of the seat where two people can sit side by side A large load is concentrated. In order to make the slide rail capable of withstanding this large load, a fixed member that is fixed to the floor at a distance from the front and rear, a fixed rail that is held by the fixed member, and a movable rail that is movable back and forth with respect to the fixed rail A vehicle seat structure comprising at least a slide rail, a seat cushion fixed to the movable rail, and a seat back supported by the seat cushion, wherein the fixed rail is made of aluminum. There has been proposed a vehicle seat structure characterized in that an iron reinforcing plate is fastened and supported at a position within the safety belt use area and avoiding the fixing member (Patent Document 1).

  However, this conventional technique has a problem in that the weight of the apparatus increases because the use area of the safety belt is fastened and supported by the reinforcing plate made of iron.

Japanese Unexamined Patent Publication No. 2013-8439

  This invention is made | formed in view of such a subject, and the objective of this invention is providing the lower rail which can ensure required intensity | strength light weight by devising the form of a lower rail.

  In order to achieve the above-mentioned object, the present invention employs the following means.

The lower rail according to the present invention is
In the lower rail used in the seat rail device and used in the seat rail device in which the upper rail is slidably provided,
An inner lower rail having a groove-like recess formed on the side surface with an opening narrower than the inside;
A cover member having a fitting portion that is formed so as to cover at least a part of the bottom surface and both side surfaces of the inner lower rail and that can be fitted so as not to be removed from the groove-shaped recess in the separating direction;
It is characterized by having.

  By adopting such a configuration, when the inner lower rail is distorted, bent, or falls due to the movement of the upper rail in other than the front-rear direction, the fitting part of the cover member is caught in the recess, so the load load is covered. It is possible to disperse the members in the member, and it is possible to prevent the inner lower rail from being distorted, bent and collapsed. As a result, the rigidity of the entire lower rail can be improved.

  In the lower rail according to the present invention, the groove-shaped recess may be characterized in that the width of the opening is formed narrower than the widest portion inside the groove. By adopting such a configuration, the fitting part will not be separated from the recessed part even if the lower rail is distorted or curved in any direction, and the fitting part is always caught on the opening side of the opening part. In particular, the force applied to the inner lower rail can be distributed to the cover member. Therefore, it is possible to prevent the inner lower rail from being distorted, bent and tilted, and as a result, the rigidity of the entire lower rail can be improved.

  Furthermore, the lower rail concerning this invention WHEREIN: The said cover member may be provided with the upper wall part which covers the upper surface of the said inner lower rail. By adopting such a configuration, even when the upper surface of the inner lower rail is distorted or is going to bend, the force can be dispersed by the upper wall portion, effectively preventing the upper wall portion from being distorted and bent. can do.

  Furthermore, in the lower rail according to the present invention, the inner lower rail may be provided with a hollow portion. Since the lower rail according to the present invention is reinforced by the cover member, sufficient rigidity can be ensured even when a cavity is provided inside the inner lower rail. By providing the hollow portion, the weight of the lower rail can be reduced.

  Furthermore, in the lower rail according to the present invention, the inner lower rail and the cover member may be made of aluminum. According to the lower rail according to the present invention, sufficient rigidity can be secured even if it is made of aluminum. By making with aluminum, a lighter lower rail can be made.

  With the lower rail according to the present invention, it is possible to provide a lower rail that is lightweight and has high rigidity.

FIG. 1 is a perspective view showing a seat rail device 100 having a lower rail 20 according to the embodiment. FIG. 2 is a front view of the seat rail device 100 having the lower rail 20 according to the embodiment. FIG. 3 is a perspective view showing the lower rail 20 according to the embodiment. FIG. 4 is a perspective view of the inner lower rail 30 of the lower rail 20 according to the embodiment. FIG. 5 is a front view showing a modification of the lower rail 20 according to the embodiment. FIG. 6 is a perspective view illustrating the cover member 40 of the lower rail 20 according to the embodiment. FIG. 7 is a perspective view illustrating a modified example of the lower rail 20 according to the embodiment. FIG. 8 is a perspective view showing a modified example of the lower rail 20 according to the embodiment.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The embodiments and drawings described below exemplify a part of the embodiments of the present invention, and are not used for the purpose of limiting to these configurations. Moreover, the same or similar code | symbol is attached | subjected to the corresponding component in each figure. In the following description, the direction of arrow A is referred to as “front-rear direction”.

  The lower rail 20 according to the present embodiment is used in a seat rail device 100 that supports a vehicle seat (not shown) so as to be slidable in the front-rear direction. As shown in FIG. 1, the seat rail device 100 mainly includes an upper rail 10 that is directly or indirectly attached to a vehicle seat and that slides back and forth, and a guide portion 25 that moves the upper rail 10 back and forth. And a lower rail 20 having the same.

  As shown in FIGS. 1 and 2, the upper rail 10 is directly attached to the left and right sides of the vehicle seat or attached to a seat frame to which the vehicle seat is attached, and supports the vehicle seat so that it can slide back and forth. It is a member to do. The mechanism for giving the slide function to the upper rail 10 is not particularly limited, and can be appropriately selected and used. Generally, the upper rail 10 is formed to slide in the lower rail 20 with a ball or a roller interposed between the lower rail 20 and the lower rail 20.

  As shown in FIGS. 2 and 3, the lower rail 20 is a long rail member having a guide path 21 that is restricted so as to move the upper rail 10 only in the front-rear direction. The lower rail 20 includes an inner lower rail 30 and a cover member 40 disposed so as to cover the periphery of the inner lower rail 30.

  As shown in FIG. 4, the inner lower rail 30 includes a bottom surface 31, both side surfaces 32 (32 a and 32 b) erected from both sides of the bottom surface 31, and an upper surface extending inward from the upper ends of the side surfaces 32 on both sides. 33 (33a, 33b). A range surrounded by the bottom surface 31, the side surface 32, and the top surface 33 forms a guide path 21 that guides the upper rail 10. On the outer peripheral surface of both side surfaces 32 of the inner lower rail 30, a groove-shaped recess 35 formed so as to have the same cross section along the longitudinal direction is formed. The cross-sectional shape of the groove-shaped recess 35 is such that the width (α) of the opening of the groove-shaped recess 35 is narrower than the width (β) inside the groove-shaped recess 35. This is to prevent a cover member 40, which will be described later, from coming off in the separation direction. In addition, as shown in FIG. 2, the groove-shaped recess 35 is such that both the upper opening side 36a and the lower opening side 36b of the opening are closer to the center than the inner upper surface 37a and the inner lower surface 37b of the groove-shaped recess 35, respectively. It is preferable that they are arranged. That is, it is preferable that the upper opening side 36 a is formed at a position lower than the inner upper surface 37 a of the groove-shaped recess 35, and the lower opening side 36 b is formed at a position higher than the inner lower surface 37 b of the groove-shaped recess 35. However, as shown in FIG. 2, the force applied from the upper rail 10 to the side surface 32 of the inner lower rail 30 is mainly in the direction of the arrow in FIG. May be formed lower than the inner upper surface 37 a of the groove-shaped recess 35. Even in this configuration, when the side surface 32 of the inner lower rail 30 is distorted or falls down in the direction of the arrow, it moves in the direction of deep engagement, so that the rigidity of the entire lower rail 20 can be improved. The inner lower rail 30 is preferably made of aluminum for weight reduction. Further, for further weight reduction, as shown in FIG. 2, a hollow portion 38 may be provided in the inner lower rail 30.

  As shown in FIG. 6, the cover member 40 covers the bottom wall portion 41, the side wall portion 42, and the bottom surface portion 31, the both side surfaces 32, and the top surface 33 (see FIG. 2) of the inner lower rail 30. It is formed in a long member having a substantially U-shaped cross section composed of the upper wall portion 43. As shown in FIG. 2, the length of the cover member 40 in the longitudinal direction may be formed to the same length as the inner lower rail 30. Alternatively, as shown in FIG. May be attached only. On the inner surface side of the side wall portion 42 of the cover member 40, as shown in the figure, a fitting portion 45 having a shape that is substantially the reverse of the shape of the groove-shaped recess 35 is provided. The cross-sectional shape of the fitting portion 45 may be substantially the same as the cross-sectional shape of the groove-shaped recess 35, but may be slightly smaller so that it can be easily inserted from the front. Even in this case, since the fitting portion 45 is caught in the groove-like recess 35 with the side surface 32 of the inner lower rail 30 slightly tilted, the force is distributed to the cover member 40 and the rigidity of the lower rail 20 is ensured. In FIG. 2, in order to improve visibility, the gap is illustrated between the inner lower rail 30 and the cover member 40, but there is actually no such gap. The cover member 40 is preferably made of aluminum for weight reduction.

  The inner lower rail 30 and the cover member 40 are integrated by sliding from the front or back side, and the side wall 42 of the cover member 40 is fitted with the groove-shaped recess 35 and the fitting portion 45 of the inner lower rail 30. For this reason, it cannot be removed in the direction of separation as it is.

  The lower rail 20 thus manufactured functions as a part of the seat rail device 100 in which the upper rail 10 is inserted inside and slides the vehicle seat back and forth with the lower rail 20 attached to the floor surface of the vehicle. To do. In addition, the seat rail device 100 may be provided with a lock mechanism that arbitrarily locks the slide, an electric device that can be moved electrically, and the other configurations are not particularly limited.

  As described above, according to the lower rail 20 according to the present invention described above, the cover member 40 does not particularly function when a force other than the front-rear direction is applied to the upper rail 10 when the seat rail device 100 is assembled. The shape can be sufficiently retained only by the rigidity of the inner lower rail 30. On the other hand, when a force in an unexpected direction such as a lateral direction or a sudden large force is applied to the upper rail 10, the side surface 32 of the inner lower rail 30 is distorted, bent, or moved in a direction that falls. There is. In such a case, since the cover member 40 is attached to the outside of the inner lower rail 30 in a fitted state, when the inner lower rail 30 is distorted, bent, or inclined, the fitting portion 45 of the cover member 40 is As a result, the force can be dispersed also to the cover member 40 and higher rigidity can be exhibited. Thus, according to the lower rail 20 concerning this invention, since high rigidity can be provided with the inner lower rail 30 and the cover member 40, sufficient intensity | strength is ensured even if it is not only iron but aluminum. be able to. By using aluminum, the seat rail device 100 that is lighter than iron can be provided.

  The present invention is not limited to the above-described embodiments, and can be implemented in various modes as long as they belong to the technical scope of the present invention.

  In the above embodiment, the upper wall portion 43 is formed so as to cover all or part of the upper surface 33 of the inner lower rail 30, but the upper wall portion 43 may not be formed as shown in FIG. 8. Even with this configuration, it is possible to prevent the side surface 32 of the inner lower rail 30 from being distorted or to be tilted.

  As shown in the above-described embodiment, the present invention can be used industrially as a component of a seat rail device for attaching a vehicle seat.

DESCRIPTION OF SYMBOLS 10 ... Upper rail, 20 ... Lower rail, 21 ... Guide path, 25 ... Guide part, 30 ... Inner lower rail, 31 ... Bottom surface, 32 ... Both side surfaces, 33 ... Upper surface, 35 ... Groove-shaped recessed part, 36a ... Upper opening edge, 36b ... lower opening side, 37a ... upper surface, 37b ... lower surface, 38 ... hollow part, 40 ... cover member, 41 ... bottom wall part, 42 ... side wall part, 43 ... upper wall part, 45 ... fitting part, 100 ... sheet Rail device

Claims (5)

In the lower rail used in the seat rail device and used in the seat rail device in which the upper rail is slidably provided,
An inner lower rail having a groove-like recess formed on the side surface with an opening narrower than the inside;
A cover member having a fitting portion that is formed so as to cover at least a part of the bottom surface and both side surfaces of the inner lower rail and that can be fitted so as not to be removed from the groove-shaped recess in the separating direction;
A lower rail characterized by comprising.   2. The lower rail according to claim 1, wherein the groove-shaped recess is formed such that the width of the opening is narrower than the widest portion inside the groove.   The lower rail according to claim 1, wherein the cover member includes an upper wall portion that covers an upper surface of the inner lower rail.   The lower rail according to any one of claims 1 to 3, wherein the inner lower rail includes a hollow portion.   The lower rail according to any one of claims 1 to 4, wherein the inner lower rail and the cover member are made of aluminum.

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