JP3479959B2 - Seat support device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rail unit in which a seat-side rail is slidably fitted in a body-side rail fixedly mounted on the floor side of a vehicle body, and between the rail unit and the seat. And a lifter mechanism for supporting the seat so that the seat can be raised and lowered with respect to a rail unit.

[0002]

2. Description of the Related Art As a seat support device of this type, for example, ones shown in FIGS. 3 and 4 have been proposed. That is, the lower base member 2D fixed to the seat side rail 1 of the rail unit and the upper base member 2U fixed to the cushion frame 3 of the seat are provided, and the shafts of the lifter mechanism are provided at the front and rear ends of the lower base member 2D. Supporting links 5F and 5R for supporting the upper base member 2U are provided on the front and rear shaft members 4F and 4R, respectively, while the members 4F and 4R are pivotally supported in parallel, while the shaft members 4F and 4R and the output shaft 6a of the drive unit 6 Is connected by transmission links 7F and 7R.

Here, each of the shaft members 4F and 4R includes
As shown in FIG. 4, a stopper 8 having an arcuate cross-section is inserted into the inside of the pivot position inserted into the through hole 2a formed in the lower base member 2D, and its inner end is welded,
An engagement groove 10 for mounting the E-ring 9 is formed outside the pivot position.

The shaft members 4F and 4R have lower base members (not shown) on the opposite side parallel to the lower base member 2D on the opposite side to the tip side where the stopper 8 and the engaging groove 10 are formed. After inserting the stopper 8 and the engagement groove 10 from the inside into the through hole 2a of the lower base member 2D, the stopper 8 is brought into contact with the inner side surface of the lower base member 2D. In this state, by mounting the E ring 9 in the engaging groove 10 protruding to the outside of the lower base member 2D, the lower base member 2D is pivotally supported by the lower base member 2D without axially slipping out.

Further, as shown in FIGS. 5 (a) and 5 (b), when the stopper portion 13 is integrally press-molded on the shaft members 4F and 4R, the cost of parts is reduced, the weight is reduced, and the stopper 8 is also used. No need for welding work.

[0006]

However, in the conventional seat support device shown in FIG. 4, the shaft member 4 is used.
When pivotally supporting F and 4R on the lower base member 2D, an engagement groove 1 for welding a stopper 8 which is a separate member to the shaft members 4F and 4R and mounting an E ring 9 for preventing slippage on the opposite side thereof
Since 0 is formed, the shaft member 4F,
The machining of 4R is troublesome and the machining cost is high, and since the stopper 8 which is a separate member is required, the cost of parts is increased and the weight is heavy. Further, the stopper 8 is fixed by welding work, so that the positional accuracy is deteriorated. Further, the stopper 8 has a semicircular shape, and has a drawback that the contact area with the lower base member 2D is reduced.

Further, in the seat supporting device shown in FIGS. 5A and 5B, the stopper portion 13 and the lower base member 2D are provided.
A circular arc surface R is formed between the lower base member 2D and the lower base member 2D, and a gap is generated between the lower base member 2D and the stopper portion 13, resulting in poor adhesion and grease accumulation. Had the drawback that no

The present invention has been made by paying attention to the unsolved problem of the above-mentioned conventional example, and it is possible to reduce the cost of parts and the processing cost, to perform the positioning with high accuracy and to reduce the weight, and the seat side rail. It is an object of the present invention to provide a seat support device capable of increasing the contact area of the stopper portion with respect to the seat portion, improving the adhesion between the stopper portion and the seat side rail, and forming a grease reservoir.

[0009]

In order to achieve the above object, a seat supporting device according to a first aspect of the present invention is such that a seat side rail is fitted to a vehicle body side rail fixed to a vehicle body floor side so that the seat side rail is slidable in the front-rear direction. A pair of parallel rail units formed in parallel with each other, and a lifter mechanism that is provided between the rail unit and a seat and supports the seat so that the seat can be moved up and down with respect to the rail unit. The mechanism has a shaft member pivotally supported on at least the seat side rail and having a support link connected to the cushion frame side of the seat, the shaft member being pivotally supported on the seat side rail of at least the one rail unit. A stopper portion that bulges in the radial direction is integrally formed on either the inner side or the outer side of the position and faces the seat side rail of the stopper portion. And characterized by forming an annular groove on.

Further, in the seat supporting apparatus according to a second aspect of the present invention, when the stopper portion is integrally press-formed on the shaft member, the annular groove is integrally press-formed on the stopper portion. .

In the seat supporting apparatus according to the first aspect of the present invention, the shaft member is a stopper that bulges in a radial direction at least inside or outside of a pivotally supporting position of the one rail unit with respect to the seat side rail. Since the annular groove is formed on the side of the stopper portion that faces the seat-side rail, the contact surface between the stopper portion and the seat-side rail can be formed at a right angle, improving mutual adhesion. The annular groove can be used as a grease reservoir. In addition, the weight, processing cost, parts cost, etc. can be reduced compared to the case where the stopper part is formed as a separate member, and the positioning accuracy of the stopper part can be maintained with high accuracy. The contact area with the side rail can be expanded over the entire circumference.

Further, in the invention according to claim 2, since the annular groove formed in the stopper portion is integrally press-formed when the stopper portion is press-formed on the shaft member, the stopper portion and the annular portion are formed. The groove and the shaft member can be formed simultaneously.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a seat supporting device according to the present invention will be described below with reference to the drawings. Figure 1
(A), (b) and FIG. 2 show a main part structure of a seat supporting device of the present invention. Although illustration is omitted in the drawings, the seat supporting devices are arranged on both sides below the seat. It is provided with a pair of rail units and a lifter mechanism provided between the rail units and the seat and supporting the seat so that the seat can be moved up and down with respect to the rail unit.

As shown in FIGS. 1 (a) and 1 (b), the shaft member 11 of the lifter mechanism has a radius on at least one of an inner side and an outer side of a pivotal position with respect to the seat side rail 21 of the one rail unit. A stopper portion 13 that bulges in the direction is integrally formed.

The stopper portion 13 formed in the vicinity of the insertion hole 21a side of the one seat side rail 21 is a circumferential flange portion which is a so-called "thug" protruding in the radial direction of the shaft member 11. Further, the E ring engaging groove 1 for mounting the E ring 31 as a retaining ring at a position separated from the stopper portion 13 by the plate width of the seat side rail 21 to the outside.
5 is formed.

An annular groove 17 is formed in the stopper portion 13 of the shaft member 11. This annular groove 17
Is the insertion hole 2 of the seat side rail 21 of the stopper portion 13.
It is formed on the side facing 1a. The annular groove 17 is integrally press-formed when the stopper portion 13 is press-formed on the shaft member 11.

Therefore, the stopper portion 13 and the annular groove 17 can be simultaneously formed in the shaft member 11, and by forming the annular groove 17 integrally in the stopper portion 13, the contact surface with the seat side rail 21 can be formed. Can be formed at a right angle,
The mutual adhesion can be improved, and the annular groove 17
Can be used as a grease reservoir.

As described above, the stopper portion 13 is integrally formed at the pivotal support position of the shaft member 11, and the annular groove 17 is integrally formed on the side of the stopper portion 13 facing the seat side rail 21. Therefore, the number of parts can be reduced and the weight can be reduced as compared with the case where the stopper is a separate member as in the conventional example, and further processing such as welding is not required. Therefore, the position of the stopper portion 13 can be positioned with high accuracy.

A push nut engaging groove may be formed in place of the E ring engaging groove 15 of the present invention, and the push nut may be engaged with the engaging groove.

[0020]

As described above, according to the invention of claim 1, the lifter mechanism has at least the support link pivotally supported by the seat-side rail and connected to the cushion frame side of the seat. Has a shaft member,
The shaft member is integrally formed with a stopper portion that bulges in a radial direction at one of the inner side and the outer side of the pivotal position with respect to the seat side rail of at least the one rail unit. Since the annular groove is formed on the opposite side, the contact surface between the stopper portion and the seat side rail can be formed at a right angle, mutual adhesion can be improved, and the annular groove can be used as a grease reservoir. . In addition, the weight, processing cost, parts cost, etc. can be reduced compared to the case where the stopper part is formed as a separate member, and the positioning accuracy of the stopper part can be maintained with high accuracy. The contact area with the side rail can be expanded over the entire circumference.

According to the second aspect of the present invention, when the stopper portion is integrally press-formed on the shaft member, the annular groove is integrally press-formed on the stopper portion. The annular groove and the shaft member can be formed at the same time, and the work efficiency can be improved.

[Brief description of drawings]

FIG. 1 shows a shaft member of a seat supporting device according to the present invention, in which (a) is a sectional view and (b) is a partially enlarged sectional view.

FIG. 2 is an exploded perspective view showing a main part of a shaft member of a seat supporting device according to the present invention.

FIG. 3 is a side view showing a conventional seat support device.

FIG. 4 is an exploded perspective view showing a conventional shaft member.

5A and 5B show a shaft member of a conventional seat supporting device, wherein FIG. 5A is a sectional view and FIG. 5B is a partially enlarged sectional view.

[Explanation of symbols]

11 Shaft member 13 Stopper part 15 E-ring engagement groove 17 annular groove 21 Seat side rail 21a insertion hole 31 E-ring

Claims (2)

(57) [Claims] 1. A pair of parallel rail units in which a seat-side rail is slidably fitted in a vehicle-side rail fixed to a floor of the vehicle body in the front-rear direction, and between the rail unit and the seat. In a seat supporting device provided with a lifter mechanism that supports the seat so as to be capable of moving up and down with respect to a rail unit, the lifter mechanism is pivotally supported at least on the seat side rail and is connected to a cushion frame side of the seat. A shaft member having a support link formed therein, the shaft member integrally including at least one of a stopper portion radially bulging inward and outward of a pivotal position with respect to a seat side rail of the one rail unit. A seat supporting device, characterized in that an annular groove is formed on a side of the stopper portion facing the seat side rail. 2. The annular groove is integrally press-formed in the stopper portion when the stopper portion is integrally press-formed on the shaft member.
Seat support device according to.