JPH0521475Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a slide rail that is installed under the seat of an automobile and allows the seat to be moved in the front and rear directions.

[Prior Art] In order to easily adjust the position of the seat to the body shape of the passenger, a slide rail is provided on the seat of an automobile, so that the seat can be moved back and forth relative to the vehicle body. An example of this slide rail is shown in FIG.

This slide rail is the first slide rail fixed to the vehicle body.
A rail 100 and a second rail 2 fixed to the seat
00. The second rail 200 has a pair of guide grooves 201 formed by bending both widthwise edges downward at a substantially right angle and further bending the tip inward at a substantially right angle. and guide groove 2
01, the edges 101 on both sides of the first rail 100 are respectively disposed, and the steel ball 300 is disposed between the lower surface of the edge 101 and the edge of the second rail 200. In addition, the first rail 100 and the second rail 200
A spring roll 400 is arranged between.

With the slide rail configured as above,
The vertical load is absorbed by the elastic force of the spring roll 400, and due to the rolling and sliding of the steel ball 300 and the spring roll 400, the second rail 2
00 is movable relative to the first rail 100.

[Problems to be Solved by the Invention] The conventional slide rail described above is formed by press working from a rolled steel plate. Therefore, the dimensional accuracy is limited to ±0.2mm. Therefore, even if the elastic force of the spring roll is adjusted according to the load, if a particularly large load is applied, the first
The rail and the second rail may come into contact with each other. Therefore, if you try to slide it in that state, the first
Since the rail and the second rail undergo sliding motion, frictional resistance increases, and a large force is required to slide the rail, resulting in a large amount of wear.

In addition, if there is a distribution of load in the width direction (left and right direction) of the slide rail, the steel ball will roll on the side where the load is small, but on the side where the large load is applied, sliding will occur in the same way as above. There is also. In such a case, it becomes difficult to slide, and uneven wear occurs on the sliding portion, causing play. In order to prevent such problems, two slide rails are arranged on the left and right to distribute the load. However, since the number of parts increases, this is not preferable in terms of man-hours and costs.

The present invention was developed in view of these circumstances, and its technical objective is to eliminate any sliding contact between the first rail and the second rail.

[Means for Solving the Problems] The slide rail of the present invention includes a long first rail, a second rail having a pair of guide grooves for guiding both side edges of the first rail, and a first rail. A spring roll disposed between the second rail and the edge and the guide on the side where the edge is urged in a direction approaching the inner circumferential surface of the guide groove due to the compressive load acting on the first rail or the second rail. a first rolling member disposed between the inner circumferential surface of the groove; and a first rolling member disposed between the edge and the inner circumferential surface of the guide groove on the side opposite to the first rolling member with respect to the edge. Two rolling members, within a load range below a predetermined value, a gap is formed between the first rolling member and the edge or guide groove surface, and the load is mainly received by the spring roll, The present invention is characterized in that when the load exceeds a predetermined value, the load is received by the spring roll and the first rolling member.

A feature of the present invention is that rolling members are arranged on both the front and back sides of the edge of the first rail. As a result, the first rail and the second rail do not come into sliding contact and can always be slid by rolling even when a large load is applied. In addition, even if the load is distributed in the width direction, it can always be slid by rolling, so the frictional resistance is lower than in the past, and there is less wear, so it is possible to prevent rattling over a long period of time.

The first rail, second rail, and spring roll can be configured in the same manner as conventional ones. Further, the rolling member can be selected from shapes such as spherical, cylindrical, and cylindrical, but it is preferable to use steel balls that have no directionality of rolling. Furthermore, as for the material, the first rail and the second rail can be formed from rolled steel plate or the like by press working, etc., as in the past.
Spring rolls are usually formed from spring steel.
The elastic force is determined according to the load acting on the slide rail.

[Function] FIG. 1 shows a sectional view of a typical slide rail of the present invention, and the function of the present invention will be explained based on this FIG.

This slide rail consists of a long first rail 1
, a second rail 2 having a pair of guide grooves 20 for guiding both side edges 10 of the first rail, and a first rail 1.
and a spring roller 3 disposed between the first rail 1 and the second rail 2;
First rolling member 4b that can freely roll between the rails 2
and a second rolling member 4a, and a load is applied from the second rail 2 side, and the description will be made assuming that the second rail 2 side is upward.

In this slide rail, when a load within a predetermined range is applied, the spring roll 3 receives the load, and the second rolling member 4a disposed below the spring roll 3 and the edge 10 primarily rolls, causing the second rolling member 4a to roll. The first rail 1 and the second rail 2 slide. When a load larger than a predetermined value is applied, the spring roll 3 is elastically deformed and the second rail 2 comes into contact with the first rolling member 4b arranged above the edge 10. The load is received by the first rolling member 4b, and the spring roll 3 and the first rolling member 4b mainly roll, causing the first rail 1 and the second rail 2 to slide.

In addition, if the load in the width direction of the slide rail is distributed and an abnormally large force is applied to one side, the second rail 2 will tilt, and the upper first rolling member 4b will be affected by the load on the side where the large load is applied. On the opposite side, the lower second rolling member 4a receives the load and rolls. That is, the rolling members having a diagonal positional relationship in the cross section roll under the load, and the first rail 1 and the second rail 2 slide.

[Effects of the Invention] That is, according to the slide rail of the present invention, even when an abnormal load is applied, the slide rail always slides due to the rolling motion of the rolling member, so that the slide rail can be easily slid. Furthermore, since wear is prevented, the occurrence of backlash can be prevented for a long period of time. Furthermore, even if the load is distributed in the left-right direction, it slides by rolling, so there is no need to use two slide rails as in the conventional case, and only one slide rail is required. This allows the number of parts to be reduced and costs to be reduced.

[Example] Hereinafter, the present invention will be specifically explained using examples. For example, in an industrial vehicle such as a power shovel, the operator may look down at his/her feet to operate the vehicle, which requires the operator to slide the seat back and forth. At this time, it is desirable that the operation box in which the operation lever etc. are arranged is also slidable at the same time. Since the floor area of this operation box is generally small, it is desirable that only one slide rail is sufficient. In this embodiment, the present invention is applied to a slide rail for sliding such an operation box.

FIG. 2 shows a plan view of the slide rail of this embodiment, and FIGS. 3 to 6 show cross-sectional views of FIG. 2, respectively. This slide rail is roughly divided into a first rail 1 fixed to the vehicle body and a second rail 2 fixed to an operation box above the first rail 1.

Two roll guides 11 extending parallel to the longitudinal direction and having a U-shaped cross section are welded to the first rail 1 at a distance so as to open upward. Then, a spring roll 3 is placed inside this roll guide 11.
are arranged so that they can roll freely, two on each side. Further, the first rail 1 has a dish shape with both side edges 10 bent at a right angle, and a rim portion 12 is formed at the tip of the edge 10, which is further bent outward at a right angle. Further, the two roll guides 11 are partially provided with U-shaped ball holding portions 13 that protrude outward.

Both side edges of the second rail 2 are bent downward at right angles, and further, the tips of the edges are bent at right angles so as to face inward to form guide grooves 20 facing each other.

The rim portion 12 of the edge portion 10 of the first rail 1 is arranged to be located within the guide groove 20. A lower ball 4a (second rolling member) is disposed between the lower surface of the rim portion 12 and the inner circumferential surface of the guide groove 20 so as to be freely rolling. In addition, the upper surface of the rim portion 12 and the guide groove 2
An upper ball 4b (first rolling member) is disposed in the ball holding portion 13 between the inner circumferential surface of the upper ball 4b and the inner circumferential surface of the upper ball 4b (first rolling member). Note that while the lower ball 4a can move with respect to the first rail 1, the movement of the upper ball 4b is restricted by the ball holding portion 13.

Further, at the end of the first rail 1, the end 21 of the second rail 2 is caulked as shown in FIG. 6, and is close to the rim portion 12 with an accuracy of 0.2 mm±0.1 mm. This restricts the movement of the second rail 2 in the left-right direction and upward direction, and also prevents the lower ball 4a from falling off. Also roll guide 1
The end of rail 1 protrudes upward and is close to the second rail 2 as well. This restricts the downward movement of the second rail 2. The first roll 1 and the second roll 2, which are formed by press working from a rolled steel plate, have a dimensional accuracy of ±0.2 mm as a limit. Therefore, it is difficult to configure them so that they are close to each other as described above. Therefore, in this embodiment, the first rail 1 and the second rail 2 are brought close together as described above by machining such as caulking.

The first roll 1 is provided with a bolt 5 protruding downward for fixing it to the vehicle body, and the second rail 2 is provided with a bolt 6 for fixing it to the operation box.
is provided so as to protrude upward. Note that, as shown in FIG. 6, one side wall 11a of the roll guide 11 is made low in height to prevent it from coming into contact with the head of the bolt 6.

In the slide rail of this embodiment configured as described above, the first rail 1 is fixed to the vehicle body by bolts 5 and 6, and the second rail 2 is fixed to the bottom surface of the operation box. When the occupant moves the position of the operation box in the longitudinal direction, the second rail 2 moves and slides relative to the first rail 1 by releasing the locking device (not shown). At this time, there is usually a slight gap between the upper ball 4b and the second rail 2 due to dimensional errors and the elastic force of the spring roll 3, so the lower ball 4a mainly rolls and the second rail 2 slides. When a load larger than the elastic force of the spring roll 3 is applied, the second rail 2 comes into contact with the upper ball 4b, and the upper ball 4b mainly rolls and slides. Further, when different loads are applied in the left and right directions, the lower ball 4a and the upper ball 4b, which are in a diagonal positional relationship in the cross section, roll and slide.

That is, according to the slide rail of this embodiment,
It is easy to slide because it always slides due to the rolling of the ball, and a single rod can perform a sufficient function. Furthermore, since there is little wear, the occurrence of backlash can be prevented for a long period of time. Furthermore, the first rail 1 and the second rail 2
Since the movement of the second rail 2 in the vertical and horizontal directions is restricted by being partially close to the rail 2, rattling is prevented.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a typical slide rail of the present invention. Figures 2 to 6 relate to a slide rail according to an embodiment of the present invention, and Figure 2 is a plan view thereof;
Figure 3 is a cross-sectional view taken along the line A-A in Figure 2, Figure 4 is a cross-sectional view taken along the line B-B in Figure 2, Figure 5 is a cross-sectional view taken along the line CC in Figure 2, and Figure 6 is a cross-sectional view taken along the line C-C in Figure 2. FIG. 2 is a sectional view taken along line DD in FIG. 2; FIG. 7 is a perspective view of essential parts of a conventional slide rail. 1...First rail, 2...Second rail, 3...
Spring roll, 4a...second rolling member, 4b
...First rolling member, 10... Edge, 11... Roll guide, 12... Rim portion, 20... Guide groove.

Claims (1)

[Claims for Utility Model Registration] A long first rail, a second rail having a pair of guide grooves that guide both side edges of the first rail, and between the first rail and the second rail. a spring roll disposed on the first rail or the second rail; and a spring roll that is connected to the edge on the side where the edge is urged in a direction approaching the inner circumferential surface of the guide groove due to a compressive load acting on the first rail or the second rail. a first rolling member disposed between the inner circumferential surface of the guide groove; and between the edge and the inner circumferential surface of the guide groove on the opposite side of the first rolling member to the edge; and a second rolling member disposed at a predetermined value, and within a load range below a predetermined value, there is a gap between the first rolling member and the edge or the guide groove surface.
is formed, the load is mainly received by the spring roll, and when the load exceeds a predetermined value, the load is received by the spring roll and the first rolling member. rail.