JPH07257239A - Seat sliding device - Google Patents

Abstract

PURPOSE:To prevent generation of abnormal sound in sliding operation, realize smooth sliding operation to improve operability, restrict need of providing higher precision of parts such as rails and in assembling them than required for reducing cost as a result, and maintain the smooth sliding operation continuously. CONSTITUTION:Rolling bodies 50, 52 are provided in a gap between rails 20, 30 on both end sides of the rails, and holding guides 41, 43 comprising wire materials extended along the length between the rolling bodies 50, 52 on both end sides are provided in the gap for holding the rolling bodies 50, 52 at specified positions by regulating getting closer to each other of the rolling bodies 50, 52, and keeping distance between them constant.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises a vehicle body side rail fixedly mounted on the vehicle body side and a seat side rail for movably fitting the vehicle body side rail in the longitudinal direction thereof to support a seat. The present invention relates to a seat slide device in which a rolling element capable of rolling while being in contact with each surface portion is interposed in a gap formed between the surface portions of the rails facing each other with a predetermined distance therebetween.

[0002]

2. Description of the Related Art As a conventional seat slide device of this type, there is, for example, one shown in FIGS. That is, as shown in FIGS. 5 and 6, balls for smoothly sliding the rails 1 and 2 on the front and rear ends of the gap 3 between the vehicle body side rail 1 and the seat side rail 2 which are combined with each other. 4, the roller 5, and the ball 4 etc. in the gap 3
The holding member 6 for holding inside was interposed.

The holding member 6 is made of an iron plate formed into a shape along the inner wall surrounding the gap 3 between the rails 1 and 2, and has a groove into which the balls 4 and the like are rollably fitted. There is. Further, the holding member 6 itself is slidably in contact with the inner walls of the rails 1 and 2 over a wide range, and there is a space between the outer surface of the holding member 6 and the inner walls of the rails 1 and 2. I could hardly afford it.

[0004]

However, in such a conventional seat slide device, between the holding member 6 holding the balls 4 and the like and the inner wall of each of the rails 1 and 2, the holding member 6 has a different shape. Since there is not enough space in terms of space, parts may engage with each other so that they rub strongly against each other due to slight error in part dimensions or deformation due to long-term use, and unpleasant noise may occur during slide operation. However, there is a problem in that the slide cannot be performed smoothly and the operability is easily deteriorated. On the other hand, in order to prevent the generation of abnormal noise and the like as much as possible, if the accuracy of the parts such as the rails 1 and 2 and the holding member 6 and the assembly accuracy at the time of assembling are increased, the cost will increase.

Further, there is no particular one for restricting the movement of the holding members 6 and 6 which are respectively interposed on the front and rear end sides of the gap 3 between the rails 1 and 2 in the rail longitudinal (front and back) direction, and the sliding operation is repeated. Thus, for example, the front and rear holding members 6, 6
May move in the gap 3 so as to be close to each other, and as a result, the distance L between the holding members 6 and 6 as shown in FIG. 7 may be gradually reduced, thereby impairing the sliding function. There was also.

The present invention has been made by paying attention to such a conventional problem, and it is possible to prevent abnormal noise from being generated at the time of a slide operation, and to enable a smooth slide operation to improve the operability. In addition, it is not necessary to increase the component accuracy and assembly accuracy of each rail, etc. more than necessary, and as a result, the cost can be reduced, and the proximity of rollers etc. arranged on both ends of the gap of each rail can be reduced. An object of the present invention is to provide a seat slide device that can be regulated and continuously maintain a smooth slide operation.

[0007]

The gist of the present invention for achieving the above object is to provide a vehicle body side rail (20) fixed to the vehicle body side (A) and the vehicle body side rail (2).
0) and a seat-side rail (30) that movably fits in the longitudinal direction to support the seat (B), and between the surface portions of the rails (20, 30) facing each other with a predetermined distance therebetween. In each of the rails (20, 30) of the seat slide device (10), a rolling element (50, 52) which is capable of rolling while being in contact with each surface portion is interposed in a gap (25, 35) generated in The gap (2
5, 35) on both ends of the rolling element (50,
52), and extending in the longitudinal direction between the rolling elements (50, 52) in the clearance (25, 35) to regulate the proximity of the rolling elements (50, 52) to each rolling element. (5
The seat slide device (10) is characterized in that a holding guide (41, 42) made of a wire material for keeping the distance between 0, 52) constant is installed.

The gist of the present invention from another point of view is that the vehicle body side rail (20) and the seat side rail (3
0) in the seat slide device (10) in which a plurality of large and small gaps (25, 35) are formed, and the rolling elements interposed at both ends in the small gap (35) are balls (52). ), The both ends of the holding guide (42) made of the wire material, which is housed between the balls (52), are brought into contact with the balls (52) as they are, while being interposed at both ends in the large gap (25). The rolling element is
0), and a ring-shaped groove (5
1) is provided, and both ends of the holding guide (41) made of the wire material installed between the rollers (50) are curved along the groove (51) of the roller (50), respectively.
1) A seat slide device (10) is characterized in that a holding portion (41a) slidably fitted therein is provided.

[0009]

[Operation] Body side rail (20) and seat side rail (30)
Rolling elements (50, 52) are respectively provided on both end sides in the gap (25, 35) with. Furthermore, the rolling elements (50, 5) on both end sides in the same clearance (25, 35)
A holding guide (41, 42) made of a wire extending in the longitudinal direction is provided between 2). Holding guides (41, 42)
Since the wire is made of wire, the shape of the gap (2
(5, 35) is elongated so that the holding guides (41, 42) are strongly engaged with the facing surfaces of the rails (20, 30) surrounding them. There is no.

Both ends of the holding guides (41, 42) have rolling elements (50, 50) interposed on both sides in the clearance (25, 35).
52) respectively, and in some form, is associated with each rolling element (50, 52) and regulates the movement of each rolling element (50, 52) toward the rail center side. That is, the gap (2
The rolling elements (50, 52) on both end sides in (5, 35) are obstructed by the presence of the holding guides (41, 42) and move in the longitudinal direction in the gaps (25, 35) so as to come close to each other. It was unable to move freely, and as a result, each rolling element (5
0,52) are kept at a constant distance from each other.

The holding guide (4
1, 42), the rolling elements (50, 52) held in place at both ends in the gap (25, 35) between the rails (20, 30) are Roll while contacting the facing surface portions. Therefore, a smooth slide operation is possible, and at the time of slide operation, the holding guides (41, 42) are connected to the rails (20,
There is no danger of engaging with the surface portion of 30) so as to rub strongly, and no abnormal noise is generated.

The relationship between both ends of the holding guides (41, 42) and the rolling elements (50, 52) is, for example, interposed at both ends in a small gap (35) between the rails (20, 30). When the rolling element is a ball (52), a holding guide (4) made of a wire material installed between the balls (52) is provided.
Both ends of the ball (5, 42)
It only has to be brought into contact with 2).

Further, when the rolling elements interposed at both ends in the large gap (25) are rollers (50), ring-shaped grooves (51) are provided on the outer circumference of each roller (50) and each roller (50) is provided. A holding guide (4
At both ends of 1), the groove (5) of the roller (50) is provided.
A holding portion (41a) is provided which is curved along 1) and is slidably fitted into the groove (51). As a result, each roller (50) can be more reliably held at a predetermined position, and a smooth sliding operation can be continuously maintained.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 to 4 show an embodiment of the present invention. As shown in FIGS. 1 and 4, the seat slide device 10 includes
The vehicle body side rail 20 fixed to the vehicle body floor A via the leg members 11 and 12, and the vehicle body side rail 20 are movably fitted in the longitudinal direction thereof (matched with the front-back direction in this embodiment) to the seat B. And a seat side rail 30 for directly supporting the vehicle.

The vehicle body side rail 20 is formed in a groove-shaped cross section that opens upward, and has a bottom surface portion 21 and both side wall portions 2
2, 22 and. In addition, flanges 22a, 2 that are bent laterally are provided on the upper end edges of the side wall portions 22, 22.
2a is formed. One of the seat side rails 30 is formed in a groove-shaped cross section that opens downward so as to cover the vehicle body side rail 20 from above, and has a ceiling portion 31 and side wall portions 32, 32. . Also, the side wall portions 32, 3
The flange 32 bent inward is provided on the lower end edge side of 2.
a and 32a are formed.

As shown in FIG. 2, the rails 20 and 30 are combined so that the opening of the seat side rail 30 covers the opening of the vehicle body side rail 20 from above. And
A plurality of large and small gaps 25 and 3 extending in the longitudinal direction are provided between the surface portions of the rails 20 and 30 facing each other with a predetermined distance therebetween.
5, 35 are formed.

More specifically, the bottom surface portion 21 and the side wall portions 22, 22 of the vehicle body side rail 20, and the seat side rail 30.
The large gap 25 is formed so as to be surrounded mainly by the respective surface portions of the ceiling portion 31. Further, on both sides of the large gap 25, the side wall portion 22 of the vehicle body side rail 20 and its flange 22a, and the side wall portion 3 of the seat side rail 30 are respectively provided.
The small gaps 35, 35 are formed so as to be surrounded by the respective surface portions of 2 and the flange 32a thereof.

Rollers 50, 50, which are rolling elements, are provided on the front and rear ends (both ends) of the rail in the large clearance 25. The roller 50 is for improving the slidability of the seat side rail 30 with respect to the vehicle body side rail 20, and can be rolled on each of the bottom surface portion 21 of the vehicle body side rail 20 and the ceiling portion 31 of the seat side rail 30. Touches. The ring-shaped groove 5 is formed at the substantially center of the outer periphery of each roller 50.
1 is provided. The groove 51 is for fitting both ends of a roller holding guide 41 described later inward.

Further, between the rollers 50 on both ends in the large gap 25, the rollers 5 extend in the longitudinal direction.
A roller holding guide 41 for holding each of the rollers 50, 50 at a predetermined position by regulating the proximity of 0 and 50 and keeping a constant distance from each other is installed. Roller holding guide 4
Reference numeral 1 denotes a wire having a small diameter, and both ends of the wire are provided with holding portions 41a which are curved along the groove 51 of the roller 50 and slidably fitted into the groove 51. That is, the roller 50 is rotatably held by the holding portion 41 a of the roller holding guide 41 that fits in the groove 51.

Balls 52, 52, which are rolling elements, are provided on the front and rear ends (both ends) of the rail in the small gap 35. The balls 52, together with the rollers 50, serve to improve the slidability of the seat side rail 30 with respect to the vehicle body side rail 20, and rollably contact the respective surface portions of both rails 20 and 30 that surround the small gap 35 from four sides. ing.

In addition, between the balls 52 on both ends in the small gap 35, the balls 5 extend in the longitudinal direction.
A ball holding guide 42 for holding the balls 52, 52 at a predetermined position by regulating the proximity of the balls 2, 52 and keeping a constant distance from each other is provided. Ball holding guide 4
Similarly to the roller holding guide 41, the wire 2 is also made of a wire having a small diameter, but both ends of the wire are not processed at all, and are cut as they are. Both ends of the ball holding guide 42 are in contact with the balls 52 in the small gap 35, respectively, and prevent the balls 52 from moving in the rail longitudinal direction.

Although not shown, each rail 20, 30
A stopper for preventing the ball 52 and the roller 50 from popping out may be provided near the front and rear end openings of the device by, for example, cutting and raising.

Next, the operation will be described. Before assembling the seat slide device 10, the rollers 50, 40 are respectively attached to the holding portions 41a, 41a at both ends of the roller holding guide 41.
50 is rotatably supported.

When the vehicle body side rail 20 is fitted so as to cover the seat side rail 30, the roller holding guide 41 to which the roller 50 is attached is internally provided in the large gap 25 formed therebetween. In addition, each rail 20,
Balls 52, 52 are provided on the front and rear ends of the small gap 35 between the balls 30, respectively.
Assembling the ball holding guide 42 between 52 is sufficient, and the assembly is extremely easy.

Each of the holding guides 41 and 42 has a simple structure made of a wire material, and is therefore lightweight and inexpensive. In particular, the ball holding guide 42 is simply linear, and its thickness (diameter) is such that the balls 52 in the small gap 35 cannot ride on the surface portions surrounding the small gap 35. Therefore, it is not necessary to increase the component accuracy and the assembly accuracy, and the cost can be reduced.

Further, the holding guides 41 and 42 are elongated in the gaps 25 and 35 between the rails 20 and 30, and the holding guides 41 and 42 surround the rails 20 and 30, respectively. There is no strong engagement with the facing surfaces. Therefore, the parts do not rub against each other strongly during the slide operation, and no unpleasant noise is generated.

Since the roller holding guide 41 in the large gap 25 securely holds the rollers 50 at the front and rear ends thereof, the movement of each roller 50 toward the rail center is restricted. That is, the rollers 50 on the front and rear ends in the large gap 25
Cannot move freely in the large gap 25 so as to approach each other.

As a result, the distance L between the rollers 50 shown in FIG. 3 is always kept constant. Further, the balls 52 provided on the front and rear ends in the small gap 35 also come into contact with the ends of the ball holding guides 42 therebetween, and freely move toward the rail center so as to be close to each other. I can't.

As a result, the rollers 50 and the balls 52 are provided at the front and rear ends in the gaps 25 and 35 between the rails 20 and 30.
Is held at a predetermined position by the holding guides 41 and 42, and the roller 50 and the ball 52 roll while contacting the facing surface portions of the rails 20 and 30 at the predetermined position. Therefore, the front and rear rollers 50 and balls 52
However, it is possible to stably maintain the smooth sliding performance without causing the positional deviation that gradually becomes closer due to the repeated sliding operation.

The roller holding guide is excellent in the material of the steel wire rod because the both ends of the roller holding guide are bent to form the holding portion. However, if the metal wire rod other than steel or a synthetic resin is used, the roller holding guide may be formed. Good. On the other hand, the ball holding guide is simply an elongated round bar shape, and from the viewpoint of weight reduction,
A synthetic resin wire having a certain thickness may be cut into an appropriate length and used as it is. Further, the ball holding guide may be fixed to the surface portion of the rail. Further, the rolling element is not limited to the illustrated embodiment and may have another shape.

The vehicle body side rail according to this embodiment is formed in a groove-shaped cross section with the opening facing upward, and the seat side rail is approximately C.
It is formed in a V-shaped cross section, and the seat side rail is fitted so as to cover the vehicle body side rail from above, but the shape of each rail and the fitting mode are not limited to the illustrated embodiment. . For example, the vehicle body side rail is formed in a substantially C-shaped cross section with the opening facing upward, the seat side rail is formed in an inverted T-shaped cross section, and a substantially horizontal portion of the seat side rail is provided inside the opening of the vehicle body side rail. It may be configured to be slidably fitted.

[0032]

According to the seat slide device of the present invention, rolling elements are provided at both ends in the gap between the rails, and the longitudinal direction is provided between the rolling elements in the gap. Since the holding guides made of wire rods that extend to regulate the proximity of each rolling element and keep the distances from each other constant, are installed, the holding guides with a relatively small cross-sectional area are attached to the conventional iron plate for each rail surface around them. Unlike a holding member made of a molded product, the members are not strongly engaged with each other, and it is possible to prevent the generation of abnormal noise such that the components are strongly rubbed with each other during the sliding operation. Further, each rolling element can be easily held at a predetermined position by the holding guide having a simple structure,
It is possible to maintain a smooth slide operation, and further, it is not necessary to raise the component accuracy and the assembly accuracy more than necessary, and as a result, the cost can be reduced.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a seat slide device according to an embodiment of the present invention.

FIG. 2 is a sectional view showing a seat slide device according to an embodiment of the present invention.

FIG. 3 is a side view showing a seat slide device according to an embodiment of the present invention.

FIG. 4 is a perspective view showing a seat supported by a seat slide device according to an embodiment of the present invention.

FIG. 5 is an exploded perspective view showing a conventional seat slide device.

FIG. 6 is a front view showing a conventional seat slide device.

FIG. 7 is a side view showing a conventional seat slide device.

[Explanation of symbols]

 10 ... Seat slide device 20 ... Car body side rail 25 ... Large gap 30 ... Seat side rail 35 ... Small gap 41 ... Roller holding guide 41a ... Holding portion 42 ... Ball holding guide 50 ... Roller (rolling element) 51 ... Groove 52 … Balls (rolling elements)

Claims (2)

[Claims] 1. A vehicle body side rail fixed to a vehicle body side, and a seat side rail that is movably fitted to the vehicle body side rail in a longitudinal direction thereof to support a seat. In a seat slide device in which a rolling element capable of rolling while being in contact with each surface portion is interposed in a gap generated between the surface portions facing each other by a fixed amount, in the gap extending in the longitudinal direction between the rails. From the wire rod that has the rolling elements interposed on both end sides and that extends in the longitudinal direction between the rolling elements in the gap to regulate the proximity of the rolling elements to keep the distance between the rolling elements constant. A seat slide device, characterized in that a holding guide is provided inside. 2. The seat slide device according to claim 1, wherein a plurality of large and small gaps are formed between the respective surface portions of the vehicle body side rail and the seat side rail, wherein the rolling element is provided at both ends of the small gap. Is a ball, and both ends of the holding guide made of the wire material installed between the balls are brought into contact with the balls, respectively, while the rolling elements interposed at both ends in a large gap are rollers, and A ring-shaped groove is provided on the outer circumference, and a holding portion that is curved between the rollers and that is slidably fitted into the groove is provided at both ends of the holding guide that is made of the wire material and that is installed between the rollers. A seat slide device characterized in that