JPH0752422Y2 - Slide rail device - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slide rail device for smoothly sliding a drawer of a desk, a locker or the like, or a drawer of electronic equipment, and more particularly to drawing a plurality of rails in a predetermined order. In addition, the present invention relates to a slide rail device that can be stored.

[0002]

2. Description of the Related Art As a conventional example of this type of slide rail device, the one described in Japanese Utility Model Publication No. 3-2008 is known. This slide rail device includes a rail holding member (corresponding to the first rail of the present invention), an outer member (corresponding to the second rail of the present invention) supported by the rail holding member so as to be slidable forward and backward, It has an inner member (corresponding to the third rail of the present invention) supported so as to be slidable forward and backward with respect to the outer member. Further, a rotatable lock lever is provided at the rear end of the outer member.

The lock lever has a locking portion which is engageable with and disengageable from a locking hole formed in a substantially middle portion of the rail holding member, and an engaging state between the locking hole and the locking portion as the inner member moves backward. An engagement releasing guide portion for releasing the inner member, a rail advancing stopper portion for preventing the inner member from advancing by hitting the rear end of the inner member when trying to advance the inner member in the disengaged state, The lock lever has a rail reverse stopper that prevents the inner member from moving backward when the rear end of the member hits.The lock lever is always rotated by a spring in the direction in which the locking portion engages with the locking hole. Energized to move.

[0004]

In the slide rail device, a spring for rotating the lock lever in the engaging direction is an essential component.

Therefore, the present invention eliminates the need for the above spring,
It is an object of the present invention to provide a slide rail device capable of reducing the number of parts and omitting the mounting work thereof.

[0006]

To achieve the above object, in a slide rail device according to the present invention, a second rail is supported so as to be slidable forward and backward with respect to a first rail.
A third rail is supported so as to be able to slide forward and backward with respect to the rail, and a stopper portion is provided at a rear end portion of the second rail to prevent the rearward movement of the third rail by hitting the rear end of the third rail. In the case where a rotatable lock lever is provided at the rear end portion of the two rails, the lock lever has a locking portion that is engageable with and disengageable from a locked portion formed on the front end side of the first rail, An attempt was made to advance the third rail in a disengaged state, and an engagement release guide portion that releases the engagement between the locked portion and the engagement portion by hitting the rear end portion of the third rail that moves backward. It is characterized by having a stopper and a guide portion which sometimes prevent the third rail from advancing by hitting the rear end of the third rail and generate a force to rotate the lock lever in the engaging direction. In addition, in order to suppress the movement of the lock lever,
A disc spring is installed on the rotation shaft of the lock lever, or a minute concavo-convex fitting part for lightly positioning and holding the lock lever at the engagement position and the engagement release position is provided on the lock lever and the second rail. Good.

[0007]

In the slide rail device having the above construction, the first rail is fixed to the main body side such as a desk and the third rail is fixed to the movable portion side such as the drawer. In this device,
The third rail is pulled out from the state in which the second rail is accommodated in the first rail and the third rail is accommodated in the second rail, that is, the drawer is accommodated in the desk. Then, the rear end of the third rail hits the stopper / guide portion of the lock lever provided on the second rail, and the third rail cannot move forward on the second rail. Therefore, by pulling out the third rail, the second rail that can move freely
The rail slides first and the second rail advances with the third rail. At this time, at the same time, due to the action of the stopper / guide portion, a force that rotates in the engagement direction acts on the lock lever.

Then, the second rail slides forward on the first rail and reaches a position where the locking portion of the lock lever on the second rail and the locked portion of the first rail can engage with each other. At this stage, the lock lever is actually rotated by the action of the above-mentioned turning force, and the lock lever-side locking portion engages with the locked portion on the first rail side to move the second rail relative to the first rail. The rail is fixed. At the same time, the lock lever is in the engaged state, and the forward blocking effect of the stopper / guide portion is released,
The third rail can move forward. Then, by further pulling out the third rail, the third rail slides on the second rail and moves forward.

On the contrary, when the extended rail is to be stored, the third rail is pushed to move the third rail backward relative to the second rail. At this time, the second rail does not move because the locking portion of the lock lever is engaged with the locked portion of the first rail. And the third
The rear end of the rail hits the stopper portion at the rear end of the second rail, so that the third rail is prevented from moving backward relative to the second rail. At the same time, the rear end portion of the third rail moving backward hits the engagement release guide portion of the lock lever, and the lock lever rotates in the engagement release direction to release the engagement between the locking portion and the locked portion. The two rails can be moved backward on the first rail. Then, by further pushing in the third rail, the second rail slides on the first rail together with the third rail and moves backward.

Thus, when pulling out, the second rail first slides on the first rail, and then the third rail slides on the second rail. Further, when storing, the third rail first slides on the second rail, and then the second rail slides on the first rail. Be sure to pull out and store in this order. Therefore, the load is applied in a predetermined state, and the sliding operation is smoothly performed.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 2 shows an outline of the entire configuration of the slide rail device of the embodiment. This slide rail device includes a first rail 10 fixed to the body side of a desk or the like, and a first rail 1
Second rail 2 supported so that it can slide forward and backward with respect to 0
0, and a third rail 30 supported on the second rail 20 so as to be slidable forward and backward. A movable part such as a drawer is fixed to the third rail 30.

The first rail 10, the second rail 20, and the third rail 30 have substantially equal lengths, and are constructed as shown in FIG. 3 and are combined with each other. That is, the first rail 10 is configured as an outer rail having a C-shaped cross section. The second rail 20 is configured as an integral part of an outer rail 21 having the same shape as the first rail 10 and an inner rail 22 having a U-shaped cross section that is integrally fixed to the back surface of the outer rail 21. Furthermore, the third rail 30
Is configured as an inner rail having the same shape as the inner rail 22 of the second rail 20.

An inner rail 22 provided on the rear surface of the second rail 20 is slidably held in the first rail 10 through a plurality of balls 40 in the longitudinal direction. In addition, the outer rail 2 on the front surface side of the second rail 20
In the inside of 1, the third rail 30 also has a plurality of balls 40.
It is held so as to be slidable in the longitudinal direction via. Thereby, the three rails 10, 20, 30 are combined with each other. Ball 40 arranged between each rail that serves as an outer rail and an inner rail.
Are held by retainers 50 and 51, respectively. Each retainer 50, 51 has a stepped portion 50a, 5 formed by bending the widthwise central portion toward the inner rail in a U-shape.
1a is formed.

Further, as shown in FIG. 2, the rear end of the third rail 30 comes into contact with the rear end of the second rail 20, so that the third
A stopper portion 23 that prevents the rail 30 from moving backward is provided, and a rotatable lock lever 60 is provided. Further, the front end of the second rail 20 is engaged with a leaf spring 31 provided on the rear end side of the third rail 30 in the same manner as in the conventional case, and defines the forward limit of the third rail 30 and the second rail 20 and the second rail 20. Three
A stopper portion 24 that locks the rail 30 is provided.

Next, the structure of the main part will be described with reference to FIGS. Since this slide rail device is used in an upright position as shown in FIG. 4, the upper side of the figure is also referred to as “upper side” and the lower side of the figure is directly referred to as “lower side” in FIG. Call. Of course, the installation posture and the attachment form are not limited to this, and it can be used upside down. However, for convenience sake, the description will be made by distinguishing the upper and lower sides.

As shown in FIG. 1, at the rear end of the second rail 20, a metal plate, which is a raw material, is bent at a right angle to stand up, so that the stopper portion 2 for preventing the backward movement of the third rail is produced.
3 is formed. Further, a square notch window 25 is formed on the slightly front side thereof. Then, a lock lever 60 formed of a metal plate is provided slightly in front of the cutout window 25.
Is attached by a shaft 61 so as to be swingable in the width direction of the second rail 20. In this case, the shaft 61 is located substantially at the center of the second rail 20 in the width direction.

The lock lever 60 has a structure in which a forearm 62 extends forward (rightward in the drawing) and a rear arm 63 extends rearward (left in the drawing) around a shaft 61. Rear arm 6
The upper half portion of 3 extends over the cutout window 25, and an engaging portion 63a that projects from the cutout window 25 to the first rail 10 side behind the cutout window 25 is formed on the upper edge thereof. This locking portion 63a
4, the upper edge of the rear arm 63 is formed by bending the upper edge of the rear arm at a right angle to the back side, and the upper edge of the cutout window 25 defines the upper rotation limit of the rear arm 63. There is.

The engaging portion 63a of the second rail 20 is in the state shown in FIG. 1A (when the rear arm 63 is in the posture parallel to the second rail 20 (in the disengaged state)). The rear retainer 50 is positioned parallel to the upper side of the step 50a. As shown in FIG. 4, the projecting end of the locking portion 63a projects from the step 50a toward the first rail 10 side. A notch 52 described later is formed at a predetermined position in the longitudinal direction of the step portion 50a of the retainer 50, and at a place other than the notch 52, the locking portion 63a hits the step portion 50a, so that the lock lever 60 is released. Is restricted from rotating in the engaging direction. Also, where there is a notch 52,
The locking portion 63a of the lock lever 60 can enter the notch 52 and move to the engagement position.

On the other hand, at an appropriate position on the front end side of the first rail 10, a locked portion 11 that engages with the locking portion 63a is provided as shown in FIG. 1 (b). This locked portion 11
Is configured as a protrusion protruding toward the second rail 20 side,
Press a part of the material of the first rail 10 to the second rail 20.
It is formed by driving to the side. Locked part 11
The punching edge on the front end side functions as an actual locked portion, and here, in the arrow (a) direction (engagement direction) of FIG.
When the locking portion 63a of the lock lever 60 that has been rotated to abut, the locking portion 63a and the locked portion 11 are brought into an engaged state.

The locked portion 11 is normally hidden in the space on the back side of the step 50a of the retainer 50, but when the position of the notch 52 formed in the step 50a coincides,
It is exposed from the notch 52. Then, at that position, the locking portion 63a of the lock lever 60 enters into the notch 52 to engage with the locking portion 63a, and the second rail 2
0 is fixed to the first rail 10.

A third rail 3 bent to have a U-shaped cross section
The rear end of 0 is open, and when the lock lever 60 takes a predetermined posture, it can pass through the lock lever 60. The rear end of the third rail 30 is formed in a V-shape by narrowing its upper and lower side edges inward. The third rail 30 is prevented from moving backward when the rear end portion 32 formed in the V shape hits the stopper portion 23 formed at the rear end of the second rail 20.

At the lower edge of the rear arm 63 of the lock lever 60,
As shown in FIG. 1C, the engagement release for rotating the lock lever 60 in the arrow (B) direction (disengagement direction) by hitting the rear end portion 32 of the third rail 30 moving backward. A guide portion 63b is formed. The disengagement guide portion 63b is composed of an inclined edge that is downwardly inclined from the front side (shaft 61 side) to the rear end side (left side in the drawing).

Further, when the third rail 30 is advanced to the lower edge of the forearm 62 of the lock lever 60 in a state where the lock lever 60 is in the disengaged position as shown in FIG. 1A. In addition, the third rail 30 comes into contact with the inner surface of the V-shaped rear end portion of the third rail 30 to prevent the third rail 30 from advancing, and the lock lever 60 is locked by the arrow (a) in FIG. 1 (b). Guide part 6 that also serves as a stopper that generates a force to rotate in the mating direction
2a is formed. This stopper / guide portion 62a
Is composed of an inclined edge that is downwardly inclined from the rear side (shaft 61 side) toward the front end side (right side in the drawing).

Next, the operation of the slide rail device having the above construction will be described in detail with reference to FIGS. 1 (a) to 1 (d). In this slide rail device, the first rail 10 is fixed to the main body side such as a desk, and the third rail 30 is fixed to the movable portion side such as a drawer.

In this device, the second rail is attached to the first rail 10.
The rail 20 is accommodated, and the second rail 20 and the third rail 30 are accommodated.
The third rail 30 is pulled out from the state in which is stored, that is, the state in which the drawer is stored in the desk. Then, as shown in FIG. 1A, the C-shaped rear end portion 32 of the third rail 30 has the lock lever 60 provided on the second rail 20.
The third rail 30 cannot move forward on the second rail 20 by hitting the stopper / guide portion 62a. Therefore, by pulling out the third rail 30, the freely movable second rail 20 slides first, and the second rail 20 advances together with the third rail 30.
At this time, at the same time, the rear end portion 32 of the third rail 30 comes into contact with the stopper / guide portion 62a, so that the lock lever 60 is acted on in the engaging direction indicated by the arrow (a).

Then, on the first rail 10, the second rail 2
0 slides and moves forward, and the locking portion 63a of the lock lever 60 on the second rail 20 and the locked portion 1 of the first rail 10
1 has reached a position where it can be engaged, that is, FIG.
When the state shown in (b) is reached, the lock lever 60 actually rotates in the direction of the arrow (a) by the action of the above-mentioned turning force, and the locking portion 63a on the lock lever 60 side is notched in the retainer 50. The second rail 20 is engaged with the locked portion 11 on the first rail 10 side via the second rail 52,
Is fixed. At the same time, the lock lever 60 is rotated to the engagement position, whereby the forward movement blocking action of the stopper / guide portion 62a is released, and the third rail 30 can move forward. Then, by further pulling out the third rail 30, the third rail 30 slides on the second rail 20 and advances, and the leaf spring 31 shown in FIG. 2 engages with the advance stopper 24 at the front end of the second rail 20. By doing so, the forward movement is stopped.

On the contrary, when the extended rail is to be housed, the third rail 30 is pushed to move the third rail 30 backward relative to the second rail 20.
At this time, in the second rail 20, as shown in FIG.
It does not move because it is engaged with the locked portion 11 of. Then, the rear end portion 32 of the third rail 30 is connected to the second rail 20.
By hitting the stopper portion 23 at the rear end, the third rail 30 is prevented from moving backward with respect to the second rail 20.

Prior to this, as shown in FIG. 1 (c), the rear end portion 32 of the third rail 30 moving backward hits the engagement release guide portion 62a of the lock lever 60, whereby the lock lever 60 is moved to the position shown in FIG. By turning in the engagement releasing direction indicated by the middle arrow (B), the engagement between the locking portion 63a and the locked portion 11 is released,
The second rail 20 is in a state of being able to move backward on the first rail 10. Then, by further pushing in the third rail 30, the second rail 20 is moved to the third rail 30 as shown in FIG.
Along with the rail 30, it slides on the first rail 10 and moves backward.

As described above, when pulling out, the second rail 20 first slides on the first rail 10, and then the third rail 30 slides on the second rail 20 to move forward. On the other hand, when storing, first the third rail 3
0 slides on the second rail 20, and then the second rail 20 slides on the first rail 10 to move backward. Be sure to pull out and store in this order. Therefore, loads are always applied to the rails 10, 20, and 30 in a fixed order, the sliding operation is smoothly performed, and the durability is improved.

Further, in this slide rail device, since the spring for urging the lock lever 60 in the engaging direction is not used, the number of parts can be reduced and the labor for mounting the spring can be saved.

Since no spring is used, the lock lever 6 may be moved when the lock lever 60 may move freely.
It is also possible to install a disc spring on the rotary shaft 60 of 0 and to press around the lock lever 60 by the frictional force generated by the axial force of the disc spring.

If it is desired to prevent the rotation more reliably, as shown in FIG. 5, the tip of the lock lever 60 and the second
Fine concavo-convex fitting portions Pa and Pb may be formed on the facing surface of the rail 20 so that the lock lever 60 can be pressed around with a light force. In this case, two recesses or protrusions on the side of the second rail 20 are provided correspondingly when the lock lever 60 is in the engagement position and in the engagement release position.

[0033]

As described above, in the slide rail device of the present invention, the force for turning the lock lever in the engaging direction is generated by the stopper / guide portion that blocks the forward movement of the third rail. It is not necessary to urge the lock lever with a spring in the engaging direction, and this spring can be omitted. Therefore, it is possible to reduce the number of parts and omit the labor for attaching the spring.

[Brief description of drawings]

FIG. 1 is a diagram sequentially showing a configuration of a main part and an operation state thereof according to an embodiment of the present invention.

FIG. 2 is a schematic diagram of the overall configuration of a slide rail device according to an embodiment of the present invention.

FIG. 3 is a sectional view taken along the line III-III of FIG.

FIG. 4 is a sectional view taken along the line IV-IV of FIG.

FIG. 5 is a diagram showing a modified example of the same embodiment.

[Explanation of symbols]

 10 ... 1st rail 11 ... Engagement part 20 ... 2nd rail 23 ... Stopper part 30 ... 3rd rail 60 ... Lock lever 61 ... Shaft 62 ... Forearm 62a ... Stopper and guide part 63 ... Rear arm 63a ... Engagement part 63b ... Engagement release guide

Claims (3)

[Scope of utility model registration request] 1. A second rail is supported so as to be slidable forward and backward with respect to a first rail, a third rail is supported so as to be slidable forward and backward with respect to a second rail, and a third rail is provided at a rear end portion of the second rail. In the slide rail device, a stopper portion is provided which prevents the rearward movement of the third rail by hitting the rear end of the rail, and a rotatable lock lever is provided at the rear end portion of the second rail. Is engaged with and disengaged from the engaged portion formed on the front end side of the first rail, and the rear end portion of the third rail that travels in reverse makes contact with the engaged portion and the engaging portion. The engagement release guide portion for releasing the engagement and the rear end of the third rail when the third rail is moved forward in the disengaged state, the forward movement of the third rail is prevented and the lock lever And a guide part that generates the force to turn the Slide rail device characterized in that it comprises a. 2. The slide rail device according to claim 1, wherein a coned disc spring for suppressing the floating motion of the lock lever is provided on the pivot shaft of the lock lever. 3. The slide rail according to claim 1, wherein the lock lever and the second rail are provided with a fine concavo-convex fitting portion for lightly positioning and holding the lock lever at an engagement position and an engagement release position. apparatus.