JP2016055084A - Braking device of slide rail - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a braking device of a slide rail, the device that eliminates looseness without almost affecting a sliding force, and brakes the sliding speed of an inner member just before a maximum extended state of the slide rail, concerning the braking device of the slide rail.SOLUTION: In a slide rail having an elastic abutment member, an outer member has both folding edges formed of a deformation guide surface continuing in a ball sliding surface and a substrate inner surface. The elastic abutment member is configured such that a detachment prevention part is pressed against the deformation guide surface from the ball sliding surface, while an inner member is attached. At the same time, an elastic abutment substrate is elastically deformed in a curve state to the substrate side of the outer member, and imparts a spring force in the direction where the inner member is always spaced apart from the outer member. Accordingly, it can be curved more greatly in the maximum extended state of the slide rail rather than the shortest reduced state of the slide rail.SELECTED DRAWING: Figure 6

Description

The present invention is a slide in which the sliding of the inner member is braked before the slide rail reaches the maximum extension state, while the sliding of the outer member and the inner member is smooth, but there is no backlash between them. The present invention relates to a rail brake device.

Conventionally, in order to smoothly slide the slide rail (to reduce the sliding force), the diameter of the ball provided between the outer member and the inner member is reduced to reduce the fitting force between the outer member and the inner member. Was.
For this reason, a gap is formed between the sliding surface of the outer member and the inner member and the ball, and thus rattling occurs between the inner member and the outer member. (The state shown in FIG. 8)

In the state where the inner member and the outer member overlap (the shortest contracted state where the inner member is housed in the outer member), the slide rail has a ball portion (a retainer portion that rotatably holds a plurality of balls) as the outer member. And it is located in the center part of the front-back direction of an inner member.
Next, when the inner member is pulled out in front of the outer member, the ball part is also moved forward by one half of the inner member moving distance. In the maximum extended state where the inner member is pulled out most, the ball part is moved to the outer member. It is located between the tip part of the inner member and the rear end part of the inner member.

That is, the backlash (separation dimension) between the outer member and the inner member at the position where the ball portion is located is only the gap dimension between the sliding surface of the outer member and the inner member and the ball.

However, when the inner member is being pulled out, the position where the ball portion is located becomes the backlash reference point (the center of rotation of the backlash), so the ball portion is located even at the fixed point location of the inner member. The backlash (separation dimension) which arises between an outer member and an inner member becomes large as it leaves | separates from a location.
In other words, in the maximum extension state of the slide rail, the backlash (separation dimension) between the front end portion of the inner member and the front end portion of the outer member is maximized, and the rear end portion of the inner member and the front end portion of the outer member (the ball is positioned). The backlash (separation dimension) is minimized.

In order to eliminate this rattling, there is a problem that if the ball diameter is increased to increase the fitting force, the sliding force becomes heavy.
In addition, while maintaining a light sliding force with the ball diameter kept small, the sliding surface of the tip of the outer member in the pull-out direction is subjected to a drawing process to strongly adjust the fitting force only at the tip. However, the above process requires adjustment of the sled rails one by one, and the work requires a high level of skill. was there.

In order to solve the above-described rattling problem, the applicant, in a slide rail including at least one outer member and an inner member that is slidable on the outer member, separates the inner member from the outer member in the thickness direction of the slide rail. The slide rail which provided the elastic contact member which gives an elastic force to an inner member in the direction to carry out in the edge part of the outer member of the direction where an inner member is pulled out was proposed. (See Patent Document 1)
In this case, although the rattling problem is solved, since the sliding force remains light, the stopper of the outer member and the stopper of the inner member collide when the slide rail stops at the maximum extension state. Another problem arises that a large impact shock occurs.
In order to solve this problem, a new member such as a buffer member may be attached to both stoppers. In this case, however, there is a problem that the number of parts increases and the cost increases.

Japanese Patent No. 5280746

In view of the above problems, the present invention prevents rattling by simply attaching to a slide rail having a weak fitting force and a light sliding force, hardly affecting the sliding force, and the slide rail is in a maximum extended state. By braking the sliding speed of the inner member in front, the impact impact at the maximum extension of the slide rail is eliminated, the number of parts is not increased, the production efficiency is excellent, the structure is simple, and it is manufactured at low cost An object of the present invention is to provide a slide rail brake device that can be used.

In order to solve the above problems, the present invention is configured as the first means, wherein the outer member is slidable through at least one outer member and a plurality of balls rotatably held by the retainer. The end of the outer member in the direction in which the inner member is pulled out, the elastic contact member that always elastically contacts the inner member in the thickness direction of the slide rail composed of the inner member in the direction away from the outer member. In the slide rail provided on the outer member, the outer member is formed by bending the substrate and both ends of the substrate in an inward arc shape, and forming a ball sliding surface, a ball sliding surface, and a deformation guide surface continuous to the substrate inner surface on the inner surface. And the elastic contact member includes an elastic contact substrate that elastically contacts the inner member, and an outer member. -It is formed integrally with a synthetic resin material from a fixed part that prevents movement in the sliding direction in conjunction with a part of it and a falling prevention part that prevents falling off in directions other than the sliding direction. When not installed, the drop-off prevention part fits into the ball sliding surface. When the inner member is installed, the end of the bent edge of the inner member is elastically pressed against the elastic contact board to prevent it from falling off. The elastic contact substrate is elastically deformed in a curved state toward the substrate side of the outer member at the same time as the portion is pressed from the ball sliding surface to the deformation guide surface, and the elastic force is applied in the direction in which the inner member is always separated from the outer member. In this way, the slide rail can be bent more greatly in the maximum extended state of the slide rail than in the shortest contracted state of the slide rail.

In order to solve the above-mentioned problem, the present invention is configured as the second means. In addition to the first means, the elastic contact substrate is formed to have a thickness larger than a continuous portion with the drop-off preventing portion. .

According to the first means of the present invention, the inner member pulls out the elastic contact member that always elastically contacts the inner member in the direction in which the inner member is separated from the outer member in the thickness direction of the slide rail. Since the inner member is provided at the end of the outer member in the direction to be pressed, the inner member is pressed outwardly in the thickness direction of the outer member via the ball, and the sliding surface of the inner member and the sliding surface of the outer member Then, there is no gap between the balls and no rattling occurs. Even if the size or weight of the moving body attached to the inner member is different, the inner member is only elastically in contact with the elastic contact member, so that an unnecessary frictional resistance does not occur, and the inner member Does not affect the sliding force of members.

In addition, since the elastic contact member is integrally formed of a synthetic resin material from the elastic contact substrate, the fixed portion, and the drop-off preventing portion, the production efficiency is high, and the installation is only one time and inexpensive. It can be manufactured with little frictional resistance and does not generate frictional contact noise.
The outer member is bent in a manner that the substrate and both end portions of the substrate are bent inwardly in a circular arc shape, and a ball sliding surface is formed on the inner surface, and a deformation guide surface is formed continuously on the ball sliding surface and the substrate inner surface. The drop-off preventing portion of the elastic contact member having an edge fits the ball sliding surface in a state where the inner member is not attached, so that the attachment is easy.

When the inner member is mounted, the end of the bent edge of the inner member is elastically pressed against the elastic contact substrate, and the drop-off prevention part is pressed against the deformation guide surface from the ball sliding surface. The elastic contact substrate is elastically deformed in a curved state on the substrate side of the outer member, and the inner member is always separated from the outer member. It will be in the state which gave impulsive force in the direction to do. And, since the slide rail is in the maximum stretched state, the backlash of the inner member and the tip of the outer member (where the ball is located) are the smallest (spacing dimension) from the shortest contracted state of the slide rail. Before the maximum extension state of the slide rail, the elastic force of the elastic contact substrate against the inner member approaches the maximum, so that the sliding speed of the inner member is inevitably applied, and the slide rail reaches the maximum extension state. When stopping, there is no big impact.

According to the second means of the present invention, the elastic contact substrate is formed to be thicker than the continuous portion with the drop-off preventing portion, so that when it is elastically deformed to a large curved state (the maximum of the slide rail). Elongated state), it has a larger impact force and can further exert a braking effect.

Main part exploded perspective view of the present invention Perspective view of the outer member tip before mounting of the elastic contact member Perspective view of the distal end portion of the outer member after the elastic contact member is attached Front view of main parts of outer member and inner member before inner member installed Front view of the main part of the slide rail at the time of the shortest contraction after the inner member is installed Front view of the main part of the slide rail when the slide rail is fully extended Cross-sectional view of the main part of the rear end of the inner member when the slide rail is fully extended Front view of main parts of conventional slide rail

The direction in which the inner member is separated from the outer member in the thickness direction of the slide rail comprising at least one outer member and the inner member slidable on the outer member via a plurality of balls rotatably held by the retainer. In addition, in the slide rail in which the elastic contact member that always elastically contacts the inner member is provided at the end of the outer member in the direction in which the inner member is pulled out, the outer member includes the substrate and both ends of the substrate. It is bent in the direction of a circular arc, has a ball sliding surface on the inner surface, and a double-folded edge formed with a deformation guiding surface continuous to the ball sliding surface and the substrate inner surface, and the elastic contact member is elastic to the inner member Elastic abutting substrate that comes into contact with the body, a fixing portion that prevents movement in the sliding direction in cooperation with a part of the outer member, and a sliding method When the inner member is not attached, the drop-off prevention part is fitted to the ball sliding surface and the inner member is attached. In this state, the end of the bent edge of the inner member is elastically pressed against the elastic contact substrate, and the drop-off prevention portion is pressed against the deformation guide surface from the ball sliding surface. It is elastically deformed in a curved state on the board side of the inner member, giving an elastic force in the direction in which the inner member is always away from the outer member, and can be bent more greatly in the maximum extension state of the slide rail than in the shortest reduction state of the slide rail The elastic contact substrate is formed to have a thickness larger than that of the connection portion with the drop-off preventing portion.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
1 to 3, reference numeral 100 denotes a slide rail. The slide rail 100 is connected to the outer member 1 via an outer member 1 and a plurality of balls 4 that are rotatably held by the retainer 2. The inner member 3 is slidably mounted on the inner member 3 and the elastic contact member 5 is provided at the end of the outer member 1 in the direction in which the inner member 3 is pulled out.

The outer member 1 is formed by bending the substrate 11 and the left and right end portions of the substrate 11 upward and inwardly in a circular arc shape, the left and right ball sliding surfaces 121 and 121 on the inner surface, and the direction extending upward from the left and right end portions of the substrate 11. The left and right bent edges 12, 12 formed with left and right deformation guide surfaces 122, 122 that are continuous with the ball sliding surfaces 121, 121 are formed in a substantially C-shaped cross-section upward.
Then, the retainer rear end stopper 13 is formed by projecting a part of the substrate 11 upward and located slightly in the rear in the center portion of the inner member 3 in the sliding direction. Inverted L-shaped retainer front end stoppers 14 and 14 are formed with a predetermined gap therebetween and projecting the substrate 11 upward and facing each other. The outer member rear end stopper 17 is formed by bending the outer member.
A predetermined gap between the retainer front end stoppers 14 and 14 serves as a fitting portion 15 of the elastic contact member 5.
Reference numerals 16... Denote connection holes for connecting the outer member 1 to a fixed side (not shown).

As shown in FIGS. 4 to 5, the retainer 2 includes L-shaped left and right ball holding protrusions 22 and 22 that hold a plurality of balls 4... The strips 22 and 22 are connected to each other, are formed in a downward U-shape, and are formed to have a length of about one-fourth of the outer member 1 from the substrate 21 protruding upward.

The inner member 3 is substantially the same length as the outer member 1, and the left and right foldings in which the substrate 31 and the left and right ends of the substrate 31 are bent downward and in an outward arc shape, and a ball sliding surface 321 is formed on the outer surface. The curved edges 32, 32 are formed in a substantially C shape with the cross section downward.
An inner member rear end stopper 311 is formed at the rear end portion of the substrate 31 in the sliding direction of the inner member 3 so as to protrude downward and come into contact with the rear end surface of the substrate 21 of the retainer 2.
Reference numerals 35... Denote connection holes with a moving body (not shown) connected to the inner member 3.

The outer member 1, the retainer 2 that rotatably holds a plurality of balls 4, and the inner member 3 are configured as described above, and the inner member 3 is mounted from the rear end of the outer member 1 to a predetermined range. Then slide as follows.
The rear end of the retainer 2 is in contact with the retainer rear end stopper 13 in the shortest contracted state where the inner member 3 and the outer member 1 overlap each other vertically.
The retainer 2 from which the inner member 3 is pulled out from this state moves a half of the sliding distance of the inner member 3 through the balls 4... And the front end of the retainer 2 eventually becomes the retainer. The inner member rear end stopper 311 of the inner member 3 comes into contact with the front end stopper 14 and simultaneously comes into contact with the rear end of the retainer 2, so that the sliding of the inner member 3 stops, and the slide rail 100 is in the maximum extended state.

Next, when the inner member 3 is housed from the maximum extended state, the retainer 2 is half the sliding distance of the inner member 3 via the balls 4. As a result, the rear end of the retainer 2 comes into contact with the retainer rear end stopper 13, and at the same time, the inner member rear end stopper 311 of the inner member 3 collides with the inner surface of the outer member rear end stopper 17. The shortest reduction state is achieved.

The sliding of the slide rail 100 is performed as described above. In particular, the ball 4 provided between the outer member 1 and the inner member 3 in order to smoothly slide the slide rail 100 (to reduce the sliding force). If the outer member 1 is used by connecting the outer member 1 to the fixed side of a machine tool or automobile, etc. When the abutting member 5 is not attached (shown in FIG. 8), the inner member 3 also vibrates between the sliding surfaces 321 and 321 and the outer peripheral surface of the ball 4... (Indicated by the two-dot chain line in FIG. 8), the moving body connected to the inner member 3 was also rattling.
In particular, the position where the ball 4 is located serves as a fulcrum, and the backlash of the inner member 3 where the ball 4 is not located is large.

Next, in order to prevent the rattling, the elastic contact member 5 attached to the end of the outer member 1 in the pull-out direction of the inner member 3 is separated from the substrate 11 of the outer member 1 by a predetermined distance in the thickness direction of the slide rail 100. And a fixing portion 52 that is fitted into the fitting portion 15 between the retainer front end stoppers 14, 14 provided on the outer member 1, and prevents the movement in the sliding direction together with the elastic contact substrate 51. The elastic contact substrate 51 is connected to both left and right ends, and is elastically fitted to the ball sliding surfaces 121 and 121 of the bent edges 12 and 12 of the outer member 1 to prevent falling off in directions other than the sliding direction. At the same time, when the inner member 3 is mounted, the slide rail is changed by elastically shifting the elastic contact substrate 51 and the outer member 1 so that the dimension between the substrate 11 becomes smaller. It consists of left and right drop-off prevention parts 53 and 53 that apply elastic force to the elastic contact substrate 51 to urge the inner member 3 in the direction away from the outer member 1 in the thickness direction of 00, and is integrally molded with a synthetic resin material Has been. The thickness of the elastic contact substrate 51 is formed to be larger than the thickness of the left and right continuous portions 54 and 54 with the left and right drop-off prevention portions 53 and 53.

The left and right drop-off prevention portions 53 and 53 are formed on the ball sliding surfaces 121 and 121 of the outer member 1 in the initial attachment state to the outer member 1 (the state shown in FIG. 4 where the inner member 3 is not attached). The outer member 1 has a close outer peripheral surface, and the right and left drop-off prevention portions 53 and 53 and the left and right drop-off prevention portions 53 and 53 are closely fitted to the ball sliding surfaces 121 and 121 and the substrate 11 of the outer member 1 at a predetermined interval. And an elastic contact substrate 51 that is spaced apart and has a substantially upward C-shape.

The fixing portion 52 is a fitting leg portion 521 that is fitted into the fitting portion 15 between the retainer front end stoppers 14 and 14 of the outer member 1, and the retainer front end stoppers 14 and 14 are in a state in which the fitting leg portion 521 is fitted into the fitting portion 15. The positioning portion 522 is in contact with the storage side.
And the positioning part 522 is formed in the magnitude | size which can be inserted in the board | substrate 21 of the retainer 2, and contact | abuts a part of storage side end surface of the retainer front-end stoppers 14 and 14, and when the slide rail 100 is extended maximum, The front end portion of the substrate 21 of the retainer 2 is externally fitted to the positioning portion 522 and comes into contact with the retainer front end stoppers 14 and 14.

The elastic contact member 5 is configured as described above. From the state shown in FIG. 2, the ball sliding of the left and right bent edges 12, 12 of the outer member 1 is performed at the position where the insertion leg portion 521 is inserted into the insertion portion 15. The drop-off prevention portions 53 and 53 are tightly fitted to the inner surfaces of the surfaces 121 and 121, and at the same time, the fitting legs 521 are fitted into the fitting portions 15 and the positioning portions 522 are brought into contact with the storage side of the retainer front end stoppers 14 and 14.
In other words, the elastic contact substrate 51 and the positioning portion 522 hold the retainer front end stoppers 14 and 14 from the drawer side and the storage side, and the elastic contact member 5 is prevented from moving in the sliding direction.
The drop prevention portions 53 and 53 are closely fitted to the inwardly arcuate ball sliding surfaces 121 and 121, so that they do not deviate in the thickness direction of the slide rail 100. (State shown in FIGS. 3 and 4)

In this state, the elastic contact substrate 51 and the substrate 11 of the outer member 1 have a predetermined interval in the thickness direction of the slide rail 100, but when the inner member 3 is mounted (from the rear end of the outer member 1 to the inner member). When the tip of the member 3 is mounted), the lower edge of the left and right bent edges 32, 32 of the inner member 3 pushes down the elastic contact substrate 51.

When the elastic contact substrate 51 is pushed down by the left and right bent edges 32, 32 of the inner member 3, the drop-off prevention parts 53, 53 are pressed from the ball sliding surfaces 121, 121 to the deformation guide surfaces 122, 122. .
At this time, since the drop-off prevention parts 53 and 53 are pressed against the deformation guide surfaces 122 and 122 from the ball sliding surfaces 121 and 121, the linear distance between the drop-off prevention parts 53 and 53 is inevitably shortened, and the drop-off prevention part is dropped off. By reducing the linear distance between the prevention parts, the elastic contact substrate 51 is pushed from both the left and right ends by the drop-off prevention parts 53 and 53.
Therefore, the elastic contact substrate 51 is elastically deformed into a curved state on the substrate side 11 of the outer member.
Then, the elastic contact substrate 51 is elastically deformed in a curved state toward the substrate side 11 of the outer member, whereby an elastic force in a direction in which the inner member 3 is always separated from the outer member 1 is generated on the elastic contact substrate 51. .

Thus, the elastic contact substrate 51 is elastically deformed in a curved state on the substrate side 11 of the outer member, and an elastic force is generated in a direction in which the inner member 3 is always separated from the outer member 1. Is pushed up so that the lower side of the ball sliding surfaces 321 and 321 and the outer peripheral surface of the ball 4 are in close contact with each other (the state shown in FIG. 5).

Then, the rear end portion of the substrate 11 of the outer member 1 is bent upward to form the outer member rear end stopper 17 to complete the slide rail 100.

Next, in a state where the outer member 1 of the slide rail 100 is connected to the fixed side and the inner member 3 is connected to the moving body (the state shown in FIG. 7), the weight of the moving body or the width of the moving body (vertical use) The inner member 3 shifts in a direction in which the substrate 31 approaches the substrate 11 of the outer member 1 depending on the width of the movable body disposed between the left and right slide rails 100, and ends of the bent edges 32, 32. The elastic contact substrate 51 is pushed toward the substrate 11 side of the outer member 1, so that the drop prevention portions 53 and 53 are further pressed from the ball sliding surfaces 121 and 121 to the deformation guide surfaces 122 and 122, and the elastic contact substrate 51. Is even more curved.
That is, since the inner member 3 is always urged by a resilient force in the direction of the thickness of the slide rail 100 in the direction away from the outer member, the inner member 3 is prevented from rattling between the outer member 1 and the inner member 3. Since the elastic contact substrate 51 is only in elastic contact with the lower edge of the bent edges 32, 32, the sliding force is hardly affected.

  Then, in the maximum extended state of the slide rail 100 from the shortest contracted state of the slide rail 100, the backlash between the rear end portion of the inner member 3 and the front end portion of the outer member 1 (where the balls 4. Since the elastic force of the elastic contact substrate 51 against the inner member 3 approaches the maximum before the slide rail 100 reaches the maximum extension state, the sliding speed of the inner member 3 is inevitably braked. Therefore, when the slide rail 100 stops in the maximum extended state, a large impact does not occur.

Since the slide rail 100 of the present invention configured as described above does not generate a large impact when stopped in the maximum extended state, it can be used not only as a part for an automobile, If used on a rail, the contents of the drawer will not pop out due to the impact when the drawer is fully opened, making it easy to use.

DESCRIPTION OF SYMBOLS 1 Outer member 11 Board | substrate 12, 12 Left and right bending edge 121, 121 Ball sliding surface 14, 14 Retainer front end stopper 15 Insertion part 100 Slide rail 2 Retainer 3 Inner member 31 Board | substrate 32, 32 Left and right bending edge 321,321 Ball sliding surface 4 Ball 5 Elastic contact member 51 Elastic contact substrate 52 Fixed portion 521 Inserting leg portion 522 Positioning portion 53, 53 Left and right dropout prevention portions 54, 54 Left and right continuous portions

Claims (2)

The direction in which the inner member is separated from the outer member in the thickness direction of the slide rail comprising at least one outer member and the inner member slidable on the outer member via a plurality of balls rotatably held by the retainer. In addition, in the slide rail in which the elastic contact member that always elastically contacts the inner member is provided at the end of the outer member in the direction in which the inner member is pulled out, the outer member includes the substrate and both ends of the substrate. It is bent in the direction of a circular arc, has a ball sliding surface on the inner surface, and a double-folded edge formed with a deformation guiding surface continuous to the ball sliding surface and the substrate inner surface, and the elastic contact member is elastic to the inner member Elastic abutting substrate that comes into contact with the body, a fixing portion that prevents movement in the sliding direction in cooperation with a part of the outer member, and a sliding method When the inner member is not attached, the drop-off prevention part is fitted to the ball sliding surface and the inner member is attached. In this state, the end of the bent edge of the inner member is elastically pressed against the elastic contact substrate, and the drop-off prevention portion is pressed against the deformation guide surface from the ball sliding surface. It is elastically deformed in a curved state on the board side of the inner member, giving an elastic force in the direction in which the inner member is always away from the outer member, and can be bent more greatly in the maximum extension state of the slide rail than in the shortest reduction state of the slide rail A slide rail brake device characterized by that. 2. The slide rail brake device according to claim 1, wherein the elastic contact substrate is formed to have a thickness larger than a portion where the elastic contact substrate is continuously provided with the drop-off prevention unit.

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