JPH0319776Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a rail device used for drawers of desks, cabinets, etc.

(Prior Art) Conventionally, as shown in FIGS. 4 to 8, as a rail device used for, for example, a desk drawer (hereinafter explained using this example), a rail device on both sides in the width direction of rail boards 11, 21 (hereinafter explained using this example) is used. The outer and inner rails 1, 2, each having a roughly U-shaped cross-section, have projecting edges 12, 22 integrally connected to each other (referred to as upper and lower sides according to the directionality of the figure). A rail device is known in which the balls 4 are fitted in a relatively slidable manner with a plurality of balls 4 held by a plastic retainer 3 interposed therebetween.

In this rail device, a stopper structure that has a function to prevent the drawer from coming off and allows the outer and inner rails 1 and 2 to be easily separated when the drawer is removed is disclosed in Japanese Utility Model Application No. 60-8653. A device using a retainer 3 as shown is known. This stopper structure will be explained with reference to FIGS. 4 to 8.

The retainer 3 has ball holding edges 3 on both upper and lower sides.
1, 31, a convex part 32 in the center, this convex part 32
and inner rail guide grooves 33, 33 are provided between the ball holding edges 31, 31 on both sides, respectively,
A plurality of balls 4 are rotatably held on both side ball holding edges 31, 31, respectively. The slide stroke of this retainer 3 is regulated to a constant level by protrusions 13 and 14 provided at both front and rear (longitudinal) ends of the outer rail board 11.

The retainer 3 includes one end of the convex portion 32 (hereinafter referred to as
This is called the front end and the other end is called the rear end) with a protrusion 3
4 and the pressing portion 35 are integrally continuous with each other and protrude toward the front of the retainer. This protrusion 36
are notches 37 provided on both upper and lower sides of the protrusion 34.
The upper and lower sides are separated from the convex surface portion 32, and the retainer is elastically swingable in the thickness direction of the retainer using the base end as a fulcrum. In this way, by the pressing operation of the pressing part 35, the protrusion piece 36 is moved to the protrusion 3 as shown in FIG.
4 protrudes from the retainer convex surface portion 32 toward the inner rail side (hereinafter, this position is referred to as the stopper action position), as shown in FIG.
is configured so that it can be swung to a position where it is flush with the convex surface portion 32 (hereinafter, this position will be referred to as the stopper release position).

On the other hand, the inner rail 2 has a stopper 23 on the front end of the rail board 21 that can be engaged with the protrusion 34 of the projecting piece 36 on the inner surface of the outer rail (the rail board 21).
The inner surface of 1 (hereinafter the same) is bent.

In this configuration, for example, when the outer rail 1 is attached as a movable rail to the drawer and the inner rail 2 is attached as a fixed rail to the desk body, at the end of the stroke in the direction of drawing out the drawer, the retainer 3
The rear end surface contacts the rear protrusion 14 of the outer rail 1, and the stopper 23 of the inner rail 2 engages with the protrusion 34 of the protrusion piece 36 of the retainer 3. This prevents the outer rail 1 from moving further forward, and prevents the drawer from coming off.

When you want to remove the drawer from the desk body, at the end of the stroke in the drawer direction,
The protruding piece 36 of the retainer 3 is pushed inward (toward the inner surface of the outer rail board 21) by the pressing portion 35. This causes the entire protrusion 36 to swing from the stopper action position shown in FIG. 6 to the stopper release position shown in FIG. In both cases, the outer rail 1 is pulled out from the inner rail 2.

Conventionally, in such a stopper structure, due to a manufacturing error of the retainer 3, the protrusion 36 becomes warped toward the outer rail 1 as shown by the solid line in FIG.
This may cause the stopper to fail, or conversely, the protrusion 36 may come too close to the inner surface of the inner rail 2, as shown by the imaginary line in FIG. This has caused troubles such as the stopper being stuck at the tip of the portion 35 and the position where the stopper action is performed (the stroke end position in the drawing direction) being out of alignment. In this way, the stopper operation becomes uncertain, and the dimensions of the retainer 3 must be strictly controlled in order to avoid the above-mentioned troubles.

(Purpose of the invention) Therefore, the present invention provides a rail device such as a drawer that can reliably perform the intended stopper operation and does not require strict dimensional control like conventional devices.

(Structure of the invention) Both outer and inner rails have projecting edges on both sides in the width direction, a retainer fitted to the outer rail so as to be able to slide with a constant stroke, and a plurality of rails held on both sides of the retainer in the width direction. In a rail device such as a drawer, the outer and inner rails are fitted so as to be slidable relative to each other with the ball interposed between the projecting edges of each other. A stopper is provided at one end of the rail that protrudes toward the inner surface of the outer rail,
On the other hand, a convex portion protruding toward the inner surface of the inner rail is provided at the center portion in the width direction of the retainer, and
At one end of this convex surface, a protrusion that can be engaged with the stopper at one stroke end of the retainer and a pressing part that can be operated to swing in a direction in which the protrusion leaves the stopper are integrally continuous. are integrally provided so as to be able to swing elastically in the thickness direction of the retainer, and the projecting piece is formed as a whole with an inclination in the direction in which the pressing part is elastically pressed against the distal end surface of the stopper, and the pressing part A distal end portion is provided with a distal end inclined portion that is inclined toward the inner surface of the outer rail, and the distal end thereof is located closer to the inner surface of the outer rail than the distal end surface of the stopper.

(Embodiment) An embodiment of the present invention is shown in FIGS. 1 to 3. In this embodiment, the same parts as those of the conventional apparatus shown in FIGS. 4 to 8 are denoted by the same reference numerals, and repeated explanation thereof will be omitted.

The basic structure of the retainer 5 is the same as the retainer 3 of the conventional device, with ball holding edges 51 and 5 on both upper and lower sides.
1. A convex part 52 is provided in the center, and inner rail guide grooves 53, 53 are provided between this convex part 52 and the ball holding edges 51, 51 on both sides, respectively, and a protrusion 54 and a pressing part are provided at the front end of the convex part 52. A projecting piece 56 integrally continuous with the portion 55 is provided to protrude toward the front of the retainer. Further, the protrusion 56 is connected to the rail thickness by the upper and lower notches 57 between the stopper action position where the protrusion 54 can be engaged with the stopper 23 of the inner rail 2 and the stopper release position where the protrusion 54 is detached from the stopper 23. The structure is also similar to the conventional retainer 3 in that it is configured to be elastically swingable in the direction.

The protruding piece 56 of the retainer 5 is arranged so that the pressing part 55 is elastically pressed against the distal end surface of the stopper 23.
As a whole, it is formed to be inclined toward the inner rail inner surface (inner surface of the rail board 21) side. The inclination angle θ ₁ of the entire protruding piece does not need to be particularly strictly defined, and the point is that the elastic crimping state between the stopper tip surface and the pressing part 55 is maintained until the stopper 23 reaches the projection 54 from the front end of the pressing part 55. Retained, Stoppa 23
It is only necessary to obtain an inclined state in which the engagement margin S of the protrusion 54 is sufficiently secured.

However, if the stopper 23 remains as it is, the protrusion 54
This means that the tip of the pressing portion 55 will be locked before the end of the pressing portion 55. Therefore, a tip inclined portion 55a is formed at the tip of the pressing portion 55 so as to be inclined toward the inner surface of the outer rail, which is opposite to the direction of inclination of the entire projecting piece 56. The inclination angle θ ₂ and the length dimension of this tip inclined portion 55a are not particularly limited, and the tip of this tip inclined portion 55a is
3 (the stopper 23 does not engage with the tip of the tip inclined portion 55a), and the stopper 23 does not get caught on the tip inclined portion 55a and protrudes. Any material may be used as long as it satisfies the two conditions of being able to move toward the 54 side without difficulty. Therefore, in an extreme case, the tip of the inclined portion 55a may come into contact with the inner surface of the outer rail. Even in this case, when the pressing portion 55 is pressed, the inclined portion 55a is elastically deformed so as to come into close contact with the inner surface of the outer rail, so that the above-described stopper release operation when removing the drawer can be performed without any problem.

(Effect of the invention) As described above, the present invention has the advantage that the protrusion 56 of the retainer 5
By tilting the entire part toward the inner surface of the inner rail, a sufficient engagement S between the stopper 23 and the protrusion 54 is ensured, and the tip of the pressing part 55 is tilted in the opposite direction to the direction of inclination of the entire protrusion. By doing so, the stopper 23 is prevented from being locked on the tip of the pressing part, so that the desired locking action (stopper action) between the stopper 23 and the protrusion 54 is always reliably achieved. . In addition, in terms of manufacturing, it is only necessary to incline the entire projecting piece 56 and the tip of the pressing part in opposite directions within the range that satisfies the above-mentioned conditions, which requires strict dimensional control as in the case of conventional devices. Since this eliminates the need for forming the retainer 5, manufacturing of the rail device becomes easy.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a retainer in a rail device according to an embodiment of the present invention, Fig. 2 is a partially enlarged cross-sectional view of the rail device, and Fig. 3 is a further enlarged view of a part of Fig. 2. , FIG. 4 is an exploded perspective view showing the conventional rail device, FIG. 5 is an enlarged vertical cross-sectional view of the same, FIG. 6 is a cross-sectional view showing the same stopper in the operating state, and FIG. 7 is a cross-sectional view showing the same stopper in the released state. FIG. 8 is a partially enlarged view for explaining the problems of the conventional rail device. 1... Outer rail, 11... Projection, 2...
Inner rail, 21...projection, 23...stopper, 4...ball, 5...retainer, 52...convex surface of retainer, 54...protrusion, 55...pressing part, 55a...tip inclined part , 56... protrusion.

Claims (1)

[Scope of utility model registration request] It includes both outer and inner rails having projecting edges on both sides in the width direction, a retainer fitted to the outer rail so as to be able to slide with a constant stroke, and a plurality of balls held on both sides of the retainer in the width direction. In a rail device such as a drawer in which both the outer and inner rails are fitted to be slidable relative to each other with the ball interposed between the protruding edges, one end of the inner rail is provided. A stopper is provided that protrudes from the inner surface of the outer rail,
On the other hand, a convex portion protruding toward the inner surface of the inner rail is provided at the center portion in the width direction of the retainer, and
a protrusion that can be engaged with the stopper at one stroke end of the retainer at one end of the convex surface;
A protrusion piece is integrally provided with a pressing part that can be pivoted in a direction in which the protrusion leaves the stopper, and is elastically swingable in the thickness direction of the retainer. The entire pressing part is inclined in the direction in which the pressing part elastically presses against the tip surface of the stopper, and the tip of the pressing part is provided with a tip inclined part that is inclined toward the inner surface of the outer rail. A rail device such as a drawer, characterized in that it is located closer to the inner surface of the outer rail than the outer rail.