JPS637547Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a seat slide device for an automobile, which comprises a seat rail that supports a seat, and a vehicle body rail that is attached to the vehicle body and slidably supports the seat rail.

As illustrated in FIG. 1, the seat consists of a seat rail 1 that supports the seat by fastening bolts to the seat mounting hole 11, and a vehicle body rail 2 that is attached to the vehicle body with bolts inserted through the mounting holes 22 of the mounting bracket 21. In the slide device, conventionally, the second
As shown in the figure, a solid cylindrical roller 3 is interposed between the seat rail 1 and the vehicle body rail 2, and rolls between the seat rail 1 and the vehicle body rail 2 together with balls 31, 31. Thereby, the vehicle body rail 2 supports the seat rail 1 in a slidable manner.

However, in such a conventional seat sliding device, the backlash and sliding load depend on the degree of engagement of the rollers 3, and there is a contradictory relationship between the backlash and the sliding load, so in order to reduce the sliding load, Roller 3 to seat rail 1
If the roller 3 is loosely interposed between the roller 3 and the vehicle body rail 2, the wobbling will increase,
If the seats are tightly interposed, the sliding load will increase and the seat will become heavier when sliding.
There is a problem of having to compromise with an intermediate state, and in order to solve this problem, instead of roller 3, a roller made of a hollow split cylindrical spring material having an axial slit in the circumferential wall is used. It was considered that the rollers could be interposed between the seat rail 1 and the vehicle body rail 2 with a biasing force using this elastic force, but the rigidity was insufficient and the rollers would be deformed if a large seating load was applied. This could not be said to be a good solution as there was a risk that the seat rail 1 would also be deformed.

The present invention was developed by focusing on these conventional problems, and by providing a roller that has an elastic force within the range of normal seating loads and becomes a rigid body under strong seating loads, the above-mentioned problem can be solved. The purpose is to solve problems.

In order to achieve such an objective, in the present invention, the roller that is rotatably interposed between the seat rail and the vehicle body rail is a solid core roller with a circumferential groove cut in the middle, and a circumferential wall. It has a split cylinder shape with an axial slit in the center, and a retaining boss that fits loosely into the core roller and fits into a circumferential groove of the core roller protrudes from the inner periphery. The outer cylinder is elastically fitted between the seat rail and the vehicle body rail until the outer cylinder is firmly fitted to the core roller, and a strong seating load is applied. The outer cylinder is elastically deformed to fit firmly into the core roller, and thereafter the roller acts as a rigid body due to the rigidity of the core roller.

Hereinafter, one embodiment of the present invention will be described based on the drawings. Note that the same parts as in the conventional example are given the same reference numerals and redundant explanations will be omitted.

Figures 3 to 8 show an embodiment of the present invention, in which rollers 4 and balls 31, 31 are interposed between the seat rail 1 and the vehicle body rail 2, and both rails are slidably fitted. are doing.

The roller 4 consists of a solid core roller 6 that is loosely fitted into an outer cylinder 5 made of a spring material.The core roller 6 has a cylindrical shape and has a circumferential groove 61 cut in the middle. has an axial slit 5 in the circumferential wall 51.
The inner diameter of the core roller 6 is considerably larger than the outer diameter of the core roller 6, and the core roller 6 is loosely fitted therein. Furthermore, a retaining boss 53 is provided on the inner periphery of the outer cylinder 5 so as to fit into the circumferential groove of the core roller 6 when the outer cylinder 5 and the core roller 6 are fitted together. Even when the outer cylinder 5 is in
and the core roller 6 are designed so that they do not come off. Further, the slit 52 is formed to have such a width that even when the outer cylinder 5 is tightly fitted to the core roller 6 due to an external force, a gap still exists.

The roller 4 is interposed so that the outer cylinder 5 is loosely fitted to the core roller 6, and the seat rail 1 and the vehicle body rail 2 are biased in a direction to expand the gap therebetween to provide a preload.

In the automobile seat slide device having the above configuration, within the normal load range, the outer cylinder 5 only elastically deforms and no load is applied to the core roller 6, and the outer cylinder 5 rolls under the load. seat rail 1
Since a preload is applied between the rail 2 and the vehicle body rail 2, they fit and slide without wobbling. When a large load is applied, the outer cylinder 5 deforms greatly and tightly fits into the core roller 6, but since the core roller 6 is solid and rigid, the roller 4 acts as a rigid body, and the outer cylinder 5 cannot be destroyed. Furthermore, even when the outer cylinder 5 is in close contact with the core roller 6, the deformed state of the outer cylinder 5 is within the elastic limit, so when the load is removed, it returns to its original state, and within the normal load range, the outer cylinder 5 Only 5 rolls under load.

Furthermore, the core roller and the outer cylinder are prevented from coming off by respective circumferential grooves and bosses, and
Since it is fitted into a sliding pair, there is relatively little frictional resistance and smooth rolling occurs. Additionally, the circumferential groove can be used as an oil reservoir, which has other effects.

Although the sheet slide device described above is one in which the rollers 4 receive loads from above and below, it goes without saying that a sheet slide device in which the rollers 4 are used vertically or in an inclined state may also be used.

According to the automobile seat slide device according to the present invention, since the rollers are made to roll with elasticity under normal loads and act as rigid bodies under heavy loads, the elasticity of the rollers is used to eliminate rattling. It is possible to fit the seat rail and the vehicle body rail, and by setting the preload appropriately, it can be made to slide easily, and it can withstand large loads, making it an extremely excellent seat slide device. can do.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a seat slide device, FIG. 2 is a cross-sectional view of a conventional seat slide device, FIGS. 3 to 8 show an embodiment of the present invention, and FIG. 4 is an enlarged exploded perspective view of the roller, FIG. 5 is a front view of the core roller, FIG. 6 is a front view of the outer tube, FIG. 7 is a side view of the outer tube, and FIG. 8 is a front view of the core roller. FIG. 7 is an enlarged sectional view of the line. 1...Seat rail, 2...Vehicle body rail, 4...
Roller, 5... Outer cylinder, 6... Core roller.

Claims (1)

[Scope of utility model registration request] In an automobile seat slide device comprising a seat rail that supports a seat, and a vehicle body rail that is attached to the vehicle body side and slidably supports the seat rail, the seat rail is rotatably interposed between the seat rail and the vehicle body rail. The roller has a solid core roller with a circumferential groove cut in the middle and a split cylinder shape with an axial slit in the circumferential wall, and the roller is loosely fitted to the core roller and has a solid core roller with a circumferential groove carved in the middle. A seat slide device for an automobile, characterized in that a retaining boss that fits into a circumferential groove of a roller is provided protruding from the circumference, and is formed of an outer cylinder made of a spring material.