JPH0248247Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a slide rail provided in a seat of a vehicle or the like.

[Conventional technology]

2. Description of the Related Art In vehicles and the like, seats are mounted so as to be movable in the front and rear directions relative to the floor via slide rails.

In this slide rail, one in which a slider made of a resin material or the like having good sliding properties is used as a sliding member is widely used. Conventionally, slide rails using this type of slider are
For example, there is one disclosed in "Utility Model Publication No. 55-13152".

In other words, this slide rail has an upper rail fixed to the seat that has a U-shaped lower part, a resin slide block attached to the tip, and this slide block is tightly fitted into the lower rail fixed to the vehicle floor side. It is constructed by inserting it into the

[Problem that the invention attempts to solve]

However, in this conventional slide rail, the slide block is inserted in surface contact with the lower rail, so the sliding resistance is large, and the clearance due to dimensional errors between the upper rail and the lower rail causes rattling, abnormal noise, etc. The problem was that smooth sliding was not possible.

The present invention has been made in view of these points, and an object of the present invention is to provide a slide rail that allows smooth sliding by devising the shape of the slider.

[Means for solving problems]

In order to achieve the above-mentioned object, the present invention forms the lower part of the movable rail 3 connected to the seat side to have a U-shaped cross section, and the upper slider 10 and the lower slider 11 are disposed above and below the lower flange portion 3a. are arranged, respectively, and the movable side rail 3 is slidably inserted in the front-back direction through the upper and lower sliders 10 and 11 into the rectangular cylindrical fixed side rail 4 fixed to the floor surface side. In the slide rail, the upper slider 10 is made of a material with required elasticity, and has spherical convex portions 14a and 14b on its upper and lower surfaces.
are formed alternately in the upper and lower directions, arc-shaped protrusions 16a and 16b are formed on both sides, and slit parts 17a and 17b are formed inside the arc-shaped protrusions 16a and 16b. .

[Effect]

By forming the upper slider 10 in this way, when the upper slider 10 is inserted between the movable rail 3 and the fixed rail 4, the spherical convex portions 14a and 14b are formed alternately in the upper and lower directions.
are elastically deformed to undulate in the vertical direction by being pressed, and the arcuate convex portions 16a and 16b are
is deformed so as to be pushed inward by crushing the slit portions 17a and 17b. By elastically deforming the upper slider 10 in this way, the play between the movable rail 3 and the fixed rail 4 is absorbed, and the movable rail 3 slides smoothly against the fixed rail 4. .

〔Example〕

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

In the figure, 1 is a slide rail, and this slide rail 1 consists of a movable side rail 3 extending downward from the side surface of the cushion frame 2 of the seat, and a fixed side rail 4 fixed to the floor side. The movable side rail 3 is formed into a U-shaped cross section with the lower part opening outward, and embossments 5a and 5b are formed at the front and rear ends of the lower flange portion 3a at the tip thereof, respectively. On the other hand, the fixed side rail 4 is formed into a rectangular tube shape with a gap 6 along the inner edge of the top surface portion 4a, and has leg pieces 7a and 7b integrally formed at the front and rear sides, and at the rear of the bottom surface portion 4b. An emboss 8 projecting upward is formed at the end, and a through hole 9 is bored at the front end.

An upper slider 10 and a lower slider 11 are fitted between the movable rail 3 and the fixed rail 4, and the movable rail 3 is moved forward and backward relative to the fixed rail 4 via the sliders 10 and 11. Assembled so that it can slide. Reference numeral 12 denotes a locking device that locks the movable side rail 3 with respect to the fixed side rail 4 at an arbitrary position, and although a detailed explanation thereof will be omitted, the locking device 12 is connected to this by operating the operating lever 12a. The member is an engaging portion 13 formed on the inner end flange portion 4c of the stationary side rail 4.
When the lock is engaged with the lock, the lock is effected.

The upper slider 10 is made of a resin material having the required elasticity, and has support surfaces 10a and 10b at the front and rear.
0b are connected by a narrower connecting arm 10c, and the front and rear support surfaces 10a
Convex portions 14a and 14b, each having a spherical tip, are formed on the upper and lower surfaces of the upper and lower surfaces of the spherical convex portions 14a and 14b, which are aligned laterally and spaced apart from each other at a predetermined interval in the front-rear direction. They are arranged alternately. These upper and lower spherical convex portions 14a and 1
The thickness a ₁ of the upper slider 10 including 4b is the height a ₂ of the slider insertion portion between the lower flange portion 3a of the movable rail 3 and the upper surface portion 4a of the fixed rail 4.
It is made slightly larger.

Also, the front and rear support surfaces 1 of this upper slider 10
The inner ends of 0a and 10b slightly protrude upward to form raised edges 15.

Furthermore, arc-shaped protrusions 16a and 16b are formed on both side edge surfaces of the front and rear support surfaces 10a and 10b of the upper slider 10, respectively, at predetermined intervals in the front and rear, and these arc-shaped protrusions 16a and 1
Slit portions 17a and 17b are formed in correspondence with each other inside 6b. Upper slider 1 including arcuate convex portions 16a and 16b on both sides
The width b ₁ of 0 is formed to be slightly larger than the width b ₂ of the slider insertion portion between the movable rail 3 and the fixed rail 4 described above.

On the other hand, the lower slider 11 is the upper slider 1.
0, it is made of a resin material, and has a raised edge 18 on its inner edge, a protruding edge 19 on its outer edge, and horizontal long holes 20a and 20b on its front and rear ends. are drilled in these elongated holes 20a and 20b, respectively, and the diameter is equal to that of the lower slider 1.
Rollers 21a and 21b whose thickness is slightly larger than that of 1
are rotatably fitted to each other.

Further, so that these sliders 10 and 11 are engaged in the longitudinal direction, a protrusion 22 is provided on the lower surface of the outer edge of the front and rear support surfaces 10a and 10b of the upper slider 10, and a protrusion 22 is provided on the protrusion edge 19 of the lower slider 11. Recesses 23 are formed corresponding to the projections 22, respectively.

Then, the upper slider 10 and lower slider 11 formed as described above are attached to the lower flange portion 3a of the movable rail 3, the upper slider 10 is attached to the upper surface, and the lower slider 11 is attached from the lower surface to the side surface of the upright portion. The convex part 22 and the concave part 23 are fitted and joined on the outer edge sides which are in contact with each other and are opposite to each other,
The movable side rail 3 with both sliders 10 and 11 attached in this way is attached to the fixed side rail 4, and the spacer 6
The rising part of the movable side rail 3 and both sliders 10
and 11 from the front so that the raised edges 15 and 18 of the sliders 1 and 11 correspond to each other.
0 and 11 are located inside the fixed side rail 4, the movable side rail 3 is assembled to the fixed side rail 4 by inserting a convex pin 9a into the through hole 9 at the front end and caulking it.

Through this fitting, the rollers 21a and 21b fitted to the lower slider 11 move to the movable rail 3.
The lower surface of the lower flange portion 3a and the bottom surface portion 4b of the fixed side rail 4 are in rolling contact, and the movable side rail 3 is supported by these rollers 21a and 21b. The upper slider 10 is elastically deformed so as to undulate in the vertical direction by pressing the spherical convex portions 14a and 14b formed vertically alternately (see FIG. 4), and the arcuate convex portion 16a. and 16b are deformed so that the slit parts 17a and 17b are crushed and pushed inward (see Fig. 5), and are press-fitted between the lower flange part 3a of the movable rail 3 and the upper surface part 4a of the fixed rail 4. It is inserted into the shape.

The upper slider 10 inserted in the deformed state between the movable rail 3 and the fixed rail 4 in this way is
The amount of elastic deformation changes depending on the clearance due to the dimensional error between both rails 3 and 4, that is, when the dimensional error between both rails 3 and 4 is large, the elastic deformation is large, and when it is small, the elastic deformation is small. This absorbs the play between both rails 3 and 4, and therefore the movable rail 3 can slide smoothly with respect to the fixed rail 4 without any play or abnormal noise.

In addition, the upper slider 10 is adjusted according to the clearance between the movable side rail 3 and the fixed side rail 4.
is elastically deformed, the lower slider 1
It is sufficient to use only one type of rollers 21a and 21b of the same size for the rollers 21a and 21b fitted in the roller 1. That is, in the assembly process, one is selected from among various types of rollers with different sizes according to the size of the clearance due to manufacturing variations. Since it is not necessary to select each time, the efficiency of assembly work is improved and it is also effective in reducing costs.

Further, the upper slider 10 has a spherical convex portion 14.
a and 14b and the arcuate convex portions 16a and 16b are fitted into the movable side rail 3 and the fixed side rail 4 with a small contact area, that is, in a point contact state, so there is little sliding resistance, and therefore the movable side The rail 3 slides more smoothly on the fixed rail 4, and due to the variation in diameter of the rollers 21a and 21b fitted to the lower slider 11, the distance between the movable rail 3 and the fixed rail 4 is reduced. Even if the slider insertion portion is abnormally pinched, the upper slider 10 is reliably inserted and operates normally by sliding the movable rail 3 against the fixed rail 4 several times.

Further, since the slider 10 has a simple structure, it is possible to provide a slide rail with stable performance at low cost.

In the above embodiments, only one slide rail is shown, but it goes without saying that the other side of the seat is also provided with a slide rail of the same configuration symmetrically.

Further, in this embodiment, the upper slider 10 is engaged with the lower slider 11 so that they slide together, but the present invention is not limited to this, and the two may be fitted and inserted separately.

[Effect of idea]

As described above, in the slide rail of the present invention, the upper slider is formed of a material having the required elasticity,
By forming protrusions alternately on the upper and lower surfaces, protrusions on both sides, and slits inside the protrusions, this upper slider can be moved between the movable rail and the fixed rail. When inserted into the rail, elastic deformation occurs and the clearance due to dimensional error between both rails is absorbed, so the movable rail slides smoothly against the fixed rail without rattling or abnormal noise. In addition, the upper slider is inserted between the movable rail and the fixed rail with point contact at the upper and lower convex portions and on both sides, so there is little sliding resistance, so the movable rail slides more smoothly against the fixed rail. The practical effects are great, such as being able to slide on the surface.

[Brief explanation of the drawing]

Figure 1 is a vertical cross-sectional view of the slide rail of the present invention.
Figure 2 is the same, side view, Figure 3 is the same, exploded perspective view,
Figure 4 is a partially cutaway side view of the main part, Figure 5 is a partially cutaway plan view of the main part, Figure 6 is a partially cutaway side view of the upper slider, and Figure 7 is a partially cutaway side view of the upper slider. same,
FIG. In the figure, 3 is the movable side rail, 4 is the fixed side rail,
10 is the upper slider, 11 is the lower slider,
14a and 14b are spherical convex portions, 16a and 16b are arcuate convex portions, and 17a and 17b are slit portions.

Claims (1)

[Scope of utility model registration request] The lower part of the movable side rail connected to the seat is formed into a U-shaped cross section, and sliders are arranged on the upper and lower surfaces of the lower flange portion, respectively, and the movable side rail is connected to the floor side through the upper and lower sliders. In this slide rail, the upper slider is made of a material having the required elasticity, and the upper slider is made of a material having the required elasticity. A slide rail characterized in that convex portions are formed alternately, convex portions are formed on both side surfaces, and slit portions are formed inside each of the convex portions.