JPH0126511Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a seat slider that supports a vehicle seat so as to be slidable in the longitudinal direction relative to the vehicle body.

[Conventional technology]

Conventionally, in this type of slider, a lower rail fixed to the vehicle body side and an upper rail fixed to the underside of the seat are fitted to each other so that they can slide in the longitudinal direction.In order to reduce the frictional resistance between both rails, there is a Many have rollers or balls inserted at required intervals.

However, in this type of slider, the pressure force between both rails and the rollers or balls is different when a load is applied to the seat and when it is unloaded, and when this pressure force becomes large, it is difficult to ensure smooth rail sliding. If there is a chip or the pressure contact force is small, there is a problem that the rails may rattle.

To solve this problem, a roller body is installed in the space between the upper rail and the lower rail, which is constructed by integrally incorporating elastic rollers with a diameter slightly larger than that of the solid roller on both sides of the solid roller. Japanese Publication No. 54-3457), a roller body consisting of two wheels with an elastic body interposed in the middle (Japanese Utility Model Publication No. 54-38652), etc. have been proposed, and the roller body is an upper rail. The lower rail is configured to be pressed against the lower rail even when the load of the seat is applied to it and when it is unloaded.

[Problem that the invention attempts to solve]

Even in a seat slider configured in this way, the upper rail and lower rail are configured to slide against each other, so it is not very advantageous in terms of strength, and the roller body interposed between these two rails has Since the clamping force is applied, the rolling movement of the rail as it slides is not smooth, and the sliding of the rail may become heavy, especially when a load is applied to the seat.

In view of this, the technical object of the present invention is to provide a seat slider that slides smoothly regardless of the load on the seat and allows the seat to be moved back and forth without rattling.

[Means for solving problems]

In order to solve the above technical problem, the seat slider according to the present invention is installed in the inner space 2 of the rail member 1, which has an upper surface and a lower surface and has a substantially C-shaped cross section and is disposed on the floor side. A main rolling wheel 5 having a mounting shaft 4 is inserted so as to be in rolling contact with either the lower surface 1b or the upper surface 1a, for example, the lower surface 1b, and the other surface, for example, the upper surface 1.
A pair of auxiliary rolling wheels 6 and 7 are interposed between a and the front and rear circumferential surfaces of the main rolling wheel 5 with a distance maintained by a guide 8.

[Effect]

The above technical means works as follows.

When the seat frame 3 is moved relative to the rail member 1 in the direction of arrow a in FIG. 7 rolls in the direction of the arrow c, that is, the main rolling wheel 5 rolls into contact with the lower surface 1b of the rail member 1, and the auxiliary rolling wheel 6 rolls into rolling contact with the upper surface 1a.
7 rotate in opposite directions to each other and integrally roll within the inner space 2 of the rail member 1, and the seat frame 3 is moved along the rail member 1.

〔Example〕

Embodiments of the present invention will be specifically described with reference to the drawings.

In the figure, 1 is a rail member disposed on the floor side of the vehicle body, and an inner space 2 has an upper surface 1a and a lower surface 1 that are parallel to each other.
b, and edge surfaces 1a' and 1b' are formed on the inner edge sides of the upper and lower surfaces 1a and 1b, respectively, and the upper and lower surfaces 1a and 1b have edge surfaces 1a' and 1b', respectively.
The outer edge sides of a and 1b are closed by an outer surface 1c and are formed in a so-called C-shaped cross section.

Reference numeral 3 denotes a seat frame, and a main rolling wheel 5 having a diameter smaller than the distance between the upper and lower surfaces 1a and 1b of the rail member 1 is rotatably attached to the lower part of both sides of the seat frame by an attachment shaft 4. For example, the lower surface 1b is placed in the inner space 2 formed by each surface of the
It is inserted so that it is in tangent with the Reference numerals 6 and 7 refer to the surfaces of the rail member 1 on which the main rolling wheel 5 rolls, in this example the surface facing the lower surface 1b, in this example guides between the upper surface 1a and the front and rear circumferential surfaces 5a of the main rolling wheel 5. 8, they are interposed with a distance maintained between them. A guide 8 that maintains the distance between the auxiliary rolling wheels 6 and 7 has holding holes 9 and 10 into which the auxiliary rolling wheels 6 and 7, which are made of a material with low frictional resistance such as resin, are rotatably inserted. Concave groove 1 into which a part of the circumferential surface of the main rolling wheel 5 is inserted
1 is formed to communicate with the above-mentioned holding holes 9 and 10, and the width of this guide 8 is equal to the width of the inner surface, that is, the edge surface 1a' or 1b' of the inner cavity 2 of the rail member 1, and the outer surface 1.
It is formed so as to be in sliding contact with c.

In addition, the seat frame 3 has a leg frame 3a attached to the front side thereof so as to be rotatable in the front and rear directions. The inclination of the seat surface is changed by moving the seat back and forth.

With the above configuration, when the seat frame 3 is moved in the direction of the arrow a in FIG. The secondary rolling wheels 6 and 7 rotated in the direction of arrow b while being in rolling contact with the lower surface 1b of the rail member 1 via In this state, the main rolling wheels 5 rolling in contact with the lower surface 1b of the rail member 1 and the auxiliary rolling wheels 6 and 7 rolling in contact with the upper surface rotate in opposite directions to each other in the inner cavity 2 of the rail member 1. Guide 8
is in sliding contact with its inner surface and rolls integrally,
The seat frame 3 is moved rearward with respect to the rail member 1. As the seat frame moves rearward, the leg frame 3a moves towards the bracket 1 against the vehicle floor.
The seat frame is rotated in the upright direction using the mounting portions 2 and 13 as fulcrums, so that the front portion of the seat frame is tilted high.

The seat slider constructed as described above can of course be applied not only to the illustrated seat frame but also to the seat frame of a seat whose front and rear positions are adjustable, and can be widely used as various sliders.

Also, in this example, the main rolling wheels 5 are formed to have a large diameter and the auxiliary rolling wheels 6 and 7 are formed to have a small diameter, but by reversing this, the auxiliary rolling wheels 6 and 7 are formed to have a large diameter and the main rolling wheels 5 It may be formed to have a small diameter, or both rolling wheels 1, 6, and 7 may be formed to have the same diameter. In addition, the positional relationship between the main rolling wheels 5 and the auxiliary rolling wheels 6 and 7 is reversed, that is, the main rolling wheels 5 are brought into rolling contact with the upper surface 1a of the rail member 1, and the auxiliary rolling wheels 6 and 7 are
It may also be configured such that it is brought into rolling contact with the lower surface 1b.

[Effect of idea]

As described above, according to the present invention, the seat slider is inserted into the inner space of the rail member having the upper and lower surfaces by rolling the main rolling wheel and the sub-rolling wheel having the shaft for attachment to the seat frame back and forth into contact with each other. The three rolling wheels touch the top and bottom surfaces of the rail member at three points and roll integrally in the same direction at the same speed, ensuring extremely smooth and stable movement even when a load is applied to the seat frame. You can move with
By rolling the two rolling wheels into contact with each other, they can roll even if they are press-fitted into the inner cavity of the rail member, and rattling can be almost completely prevented, resulting in a more stable sliding effect. This has great practical effects, such as the ability to obtain

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway inner side view of the main part of an example of a seat slider according to the present invention, Fig. 2 is a cross-sectional view taken along line A-A in Fig. 1, and Fig. 3 is a cross-sectional view of the guide that holds the sub-rolling wheels. FIG. 4 is a perspective view of an example of a seat frame to which a seat slider according to the present invention is applied. In the figure, 1 is a rail member, 1a is an upper surface, 1b is a lower surface, 2 is an inner space, 3 is a seat frame, 4 is an attachment shaft, 5 is a main rolling wheel, 6 and 7 are sub rolling wheels, 8
is a guide.

Claims (1)

[Scope of utility model registration request] A main rolling wheel having a shaft for attachment to the seat frame is inserted into the inner cavity of the rail member having an upper surface and a lower surface so as to be in rolling contact with either the lower surface or the upper surface, and the other surface and the main A seat slider characterized in that a pair of auxiliary rolling wheels are interposed between the front and rear circumferential surfaces of the rolling wheels with a distance maintained by a guide.