JPS632337Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field] The present invention consists of a pair of lower rails having a U-shaped vertical cross section, which extend and are fixed parallel to each other along the longitudinal direction of the automobile floor, and these lower rails. It includes a pair of longitudinal members with an L-shaped vertical cross-section provided to be slidable along the rail, and a pair of lateral members connected to these longitudinal members, and these lateral members and the longitudinal member form approximately four sides. The present invention relates to a sliding mechanism for an automobile seat having a shaped seat frame.

[Prior art]

A part of the seat frame itself of a car seat is used as the top rail in the slide mechanism.
It is described in Japanese Utility Model Application Publication No. 53-94217. This is different from the conventional mechanism in which the upper rail (upper rail) is slidably attached to the lower rail (lower rail) fixed to the car floor, and this upper rail is fixed to the seat frame.
A part of the seat frame is a top rail, which serves as a top rail and a seat frame. Similar ideas are known as those described in Japanese Unexamined Patent Publication No. 56-95730 and Japanese Utility Model Application No. 56-98743. Also, although it is not part of the seat frame,
A reclining mechanism with a top rail as part of the base plate was also used in 1986-36417.
It is stated in the No. As described above, it has been conventionally practiced to allow a member (seat frame or base plate) that constitutes an automobile seat to function as one of the members that constitute a slide mechanism. In addition, in such conventional technology, it is well known that rollers or ball bearings are used to slide the upper rail relative to the lower rail, and it is also well known that slide blocks made of synthetic resin may be used instead of these. Are known. Examples of devices using a slide block include those described in the aforementioned Japanese Utility Model Publication No. 53-94217, Japanese Utility Model Publication No. 54-36417, and Japanese Utility Model Publication No. 55-13152. However, a slide mechanism that uses two of rollers, balls, or slide blocks in combination to provide better stability and smooth sliding is not well known. One of the few prior art examples of such a mechanism is the one described in Japanese Patent Application Laid-Open No. 53-93523, in which the sliding motion of the upper rail is achieved by a slide block called a slide show and a ball. However, in such a conventional example, in order to ensure the stability of sliding of the upper rail, it is necessary to interpose the balls in two horizontal rows, and in addition, one piece of the U-shaped part of the upper rail and the U-shaped part of the lower rail are interposed between the balls. and one piece of each other's U
Assemble them by inserting them into the groove and interlocking with each other.
Since the slide shoe is attached to the tip of one piece, the bending process of the lower rail and upper rail must be made with high accuracy, and the dimensions of the ball must be accurate, otherwise the upper rail may not be inserted into the lower rail during the final assembly stage. Even if it is assembled, if the machining precision of each ball and each rail is not accurate, the atsupa rail will slide from side to side, which will impair the smoothness and stability of the seat itself. . In addition, there are drawbacks such as the complexity of machining each rail and the inevitable increase in the number of parts, resulting in a complicated structure, lack of durability and instability due to wear of the slide shoe, and realization of low cost and weight reduction. It was fraught with difficulties.

[Purpose of invention]

The present invention was devised in view of the above circumstances, and aims to reduce the number of parts, simplify the structure, facilitate assembly, reduce weight, and reduce cost, while also making use of the features of the conventional technology. The object of the present invention is to provide a sliding mechanism for an automobile seat that achieves stability and smoothness.

[Structure of the idea]

In order to achieve the above object, the present invention is such that the lower rail, which has a U-shaped longitudinal section, is arranged with its opening facing toward both sides of the vehicle, and the longitudinally extending member (corresponding to the upper rail) has its horizontal bent portion. A channel-shaped roller holder is inserted between the upper side and the lower side of the lower rail, and a channel-shaped roller holder is attached to this horizontal bent part so as to sandwich the horizontal bent part, and a guide ball is installed on the upper surface of this roller holder. A guide ball is rotatably fitted into the holding hole, and a drum-shaped guide roller is rotatably attached to the lower surface of the guide ball, and a drum-shaped guide roller is rotatably attached to the lower surface of the guide ball to extend a predetermined length in the longitudinal direction of each horizontal bent portion of the two front-rear members. At least two grooves are formed, and at least two guide balls of the roller holder are rotatably placed in each of these grooves, and a protrusion on the lower surface of the groove is connected to the drum-shaped guide roller. A rail groove is formed over a predetermined length on the lower surface of the upper side of the lower rail in which the upper surface of the guide ball rolls, and a drum-shaped guide is formed on the upper surface of the lower side of the lower rail. A protrusion for the roller to roll is formed over a predetermined length, and the roller holder is horizontally folded by sandwiching the upper and lower parts of the groove of the horizontal folding part between the guide ball and the guide roller of the roller holder. The structure is such that it is attached to a curved part.

[Example of idea]

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

The seat frame, which is generally indicated by F in FIG. 1, has a substantially quadrilateral shape by connecting a pair of front-rear members 11, 11 existing along the front-rear direction of the vehicle with lateral members 13, 13 disposed at the front and rear of the vehicle. This seat frame F
A seat frame 6 is elastically suspended and supported by a spring 7 inside the seat frame 6.

The longitudinal member 11 has a second cross-sectional view.
As is clear from the figure, at least two grooves 12A and 12B are formed in the longitudinal direction of the upper surface of the horizontally bent portion 12, which is L-shaped in longitudinal section and spaced apart from each other at appropriate intervals.

As is clear from FIGS. 3 and 4, the lower rail 2 has a U-shape in longitudinal section, and its upper side 21
A rail groove 21A extending in the longitudinal direction is formed on the lower surface of the rail. The width and depth of this rail groove 21A are the same as those of the grooves 12A and 12B of the front-rear direction member 11, and are selected to have a size suitable for holding a guide ball 4, which will be described later.

A protrusion 23A extending in the longitudinal direction is formed on the upper surface of the lower side 23 of the lower rail 2.
3A has an arcuate cross section that engages with the body of a drum-shaped guide roller 5, which will be described later. In addition,
Reference numeral 22 is a vertical portion.

What is shown in FIG. 5 is a channel-shaped roller holder 3, in which a guide ball holding hole 31A having a diameter slightly larger than the outer diameter of the guide ball 4 is bored in the upper surface 31, and a guide ball holding hole 31A having a diameter slightly larger than the outer diameter of the guide ball 4 is bored in the upper surface 31. 33 is formed with a guide roller holding hole 33A that rotatably supports the drum-shaped guide roller 5. Note that reference numeral 33B is a shaft support protrusion that rotatably supports the guide roller 5, and is formed to protrude from the opposing edge of the guide roller holding hole 33A. Further, reference numeral 32 is a lateral surface portion.

The above-mentioned longitudinal member 11 and lower rail 2 are assembled and connected using the roller holder 3, guide ball 4, and guide roller 5 as intervening members as shown in FIG. As is clear from the figure, the size and shape of the guide ball 4 and the guide roller 5 are the same as the grooves 12A and 1 formed on the upper surface of the horizontally bent portion 12 of the front-back member 11.
Lower rail 2 with protrusions seen from the bottom of 2B
It is selected so that it has the same size as the protrusion 23A formed on the upper surface of the lower side portion 23 of.

The seat frame F and the lower rail 2 assembled as shown in FIG. 6 can freely slide in the longitudinal direction of the lower rail 2 within the length range of the grooves 12A and 12B. In this case, when a load is applied to the seat frame F, a pressing force is applied to the drum-shaped guide roller 5 through the front-rear direction member 11, and the guide roller 5 is moved between the protrusion 23A of the lower rail 2 and the concave groove of the horizontal bent piece 12. The relative movement between the seat frame F and the lower rail 2 becomes smoother because it is clamped between the protrusions formed on the lower surfaces of 12A and 12B and rolls reliably.

[Effect of idea]

As explained above, the present invention includes a pair of lower rails 2, 2 having a U-shaped vertical cross section, which extend and are fixed parallel to each other on the vehicle floor in the longitudinal direction of the vehicle, and these lower rails 2, 2. .
A pair of horizontal members 13, 13 connected to 1,
These horizontal members 13, 13 and the direction member 11,
11 constitutes a substantially quadrilateral seat frame F, the lower rails 2, 2 each having a U-shaped longitudinal section are arranged with their opening surfaces directed toward both sides of the vehicle; The front and back members 11, 11 have horizontal bent portions 12, 12.
is inserted between the upper side parts 21, 21 and the lower side parts 23, 23 of the lower rails 2, 2, and this horizontal bent part 1
Channel-shaped roller holders 3, 3 are attached to 2, 12 so as to sandwich the horizontal bent portions 12, 12,
The guide balls 4, 4 are rotatably fitted into the guide ball holding holes 31A, 31A formed on the upper surface of the roller holders 12, 12, and the drum-shaped guide rollers 5, 5 are rotatably fitted on the lower surface thereof. installed,
At least two grooves 12A, 12B each having a predetermined length are formed in the longitudinal direction of each horizontal bent portion 12, 12 of the two front-rear direction members 11, 11,
At least two guide balls 4, 4 of the roller holders 12, 12 are provided in these grooves 12A, 12B, respectively.
is placed rotatably, and the concave grooves 12A,
The protrusion on the lower surface of 12B is placed in the recess at the center of the drum-shaped guide rollers 5, 5, and the guide balls 4, 4 are placed on the lower surface of the upper sides 21, 21 of the lower rails 2, 2.
Rail grooves 21A, 21A for rolling of the upper surface of
is formed over a predetermined length, and a drum-shaped guide roller 5,
Projections 23A, 23A for rolling of the roller holders 3, 23A are formed over a predetermined length, and the roller holders 3, 3
The roller holders 3, 3 are attached to the horizontal bent parts 12, 12 by sandwiching the upper and lower parts of the grooves 12A, 12B of the horizontal bent parts 12, 12 with the guide balls 4, 4 and the guide rollers 5, 5. It is characterized by: Therefore, the present invention produces the following remarkable effects.

(i) Since the front and rear members of the seat frame have a structure that also serves as an upper rail, and the structure of both rails is simply a bent structure of an L-shape and a U-shape, the structure and processing are easy; (ii) Since both rails are L-shaped and U-shaped,
Ordinary channel steel materials and angle steel materials are used in various structures, so they not only have excellent strength and reliability, but also do not require any special bending machines and can be used with conventional general processing machines. (iii) Since the longitudinal member serves as both the frame and the upper rail, the load on the seat is directly applied to this longitudinal member, and the L-shaped member receives this load. There are spherical guide balls and drum-shaped guide rollers above and below the horizontal bending part of the longitudinal member, which converts the load applied to the longitudinal member into rolling motion, resulting in smooth sliding. Not only is this possible, but even if the load applied to the seat, that is, the front-back member, is not only vertical but also diagonal, the guide roller is shaped like a drum, and its curved surface allows it to receive the diagonal load and produce rolling force. (iv) The horizontal bent part of the longitudinal member is located between the upper and lower sides of the lower rail, and the horizontal member is provided almost horizontally with this horizontal bent part. , the load is uniformly applied to the front-back member and the lower rail, eliminating the risk of rattling, and (v) the guide roller is shaped like a drum with a diameter larger at both ends than at the center. Therefore, the longitudinal member can be supported at three points, the center and both ends, and it is possible to prevent the longitudinal member from wobbling. (vi) Overall, the structure is simpler and easier to assemble. ,
The cost can be reduced and the weight can be reduced, and the number of parts can ensure stability and smoothness of sliding at least.

[Brief description of the drawings]

Fig. 1 is a perspective view showing an embodiment of this invention, Fig. 2 is a cross-sectional view of the longitudinal member of the seat frame of this invention, Fig. 3 is a side view of the lower rail, and Fig. 4 is a side view of the lower rail.
The figure is a cross-sectional view taken along the - line in FIG. 3, and FIG. 5 is a perspective view showing the roller holder, guide ball, and guide roller.
FIG. 6 is a cross-sectional view showing the state of engagement between the seat frame and the lower rail. F...Seat frame, 2...Lower rail, 3
... Roller holder, 4 ... Guide ball, 5 ... Guide roller, 11 ... Front-back member, 12 ... Horizontal bending part, 12A, 12B ... Concave groove, 13 ... Horizontal member,
21...Top side part, 21A...Rail groove, 22...
Vertical part, 23...Lower side part, 23A...Protrusion, 31
...Top part, 31A...Guide ball holding hole, 32...
Lateral part.

Claims (1)

[Scope of Claim for Utility Model Registration] A pair of lower rails with a U-shaped longitudinal section extending and fixed parallel to each other in the front-rear direction of the vehicle, and a rail that is slidable along these lower rails. The seat frame includes a pair of longitudinal members having an L-shaped longitudinal section and a pair of lateral members connected to these longitudinal members, and these lateral members and the longitudinal members constitute a substantially quadrilateral seat frame. In the slide mechanism for an automobile seat, the lower rail having a U-shaped longitudinal section is arranged with its opening surface facing both sides of the automobile, and the horizontally bent portion of the longitudinal member is arranged at the upper and lower sides of the lower rail. A channel-shaped roller holder is installed in this horizontal bent part so as to sandwich the horizontal bent part, and the guide ball rotates in the guide ball holding hole drilled in the upper surface of this roller holder. A drum-shaped guide roller is rotatably attached to the lower surface of the guide roller, and at least two grooves of a predetermined length are formed in the longitudinal direction of each horizontal bent portion of the two longitudinal members. At least two guide balls of a roller holder are rotatably placed in each of these grooves, and a protrusion on the lower surface of the groove is placed in a depression at the center of the drum-shaped guide roller. A rail groove for rolling the upper surface of the guide ball is formed over a predetermined length on the lower surface of the upper side of the lower rail, and a drum-shaped guide roller is formed on the upper surface of the lower side for rolling. The protrusion is formed over a predetermined length, and the roller holder is attached to the horizontal bent portion by sandwiching the upper and lower portions of the concave groove of the horizontal bent portion between the guide ball and the guide roller of the roller holder. A sliding mechanism for an automobile seat featuring: