JPH0230991Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a telescoping slide rail used when two structural members are slidably provided.
The present invention relates to a slide rail in which a plurality of slides can be expanded and contracted in the longitudinal direction using a ball retainer as a sliding medium that can separate a plurality of slides into left and right sides.

This type of slide rail is composed of two or more slides, and conventional slide rails are made of metal, as shown in Figures 1 and 2 (a set of three slides is illustrated). The second slide 2 is joined to the first slide 1 made of a long and thin plate, and
The third slide 3 is attached to the second slide 2, and the left and right sides of the second slide 2 are placed inside the left and right outer ball guides 4 formed by bending the left and right edges of the first slide 1 in the longitudinal direction. The left and right inner ball guides 5 formed by bending the edges in the longitudinal direction are opposed to each other, and inside the upper left and right outer ball guides 6 formed by bending the edges in the longitudinal direction on the upper part of the left and right inner ball guides 5, The left and right inner ball guides 7 formed by bending the left and right edges of the third slide 3 in the longitudinal direction are opposed to each other, and a pair of left and right inner ball guides 4 and 5 separated laterally are arranged to face each other. A pair of second ball retainers 9 separated left and right are interposed between the upper left and right outer ball guides 6 and the left and right inner ball guides 7, respectively, and the ball retainers 8, 9 is used as a sliding medium to allow each of the slides 1, 2, and 3 to expand and contract with respect to each other in the longitudinal direction.

And the above first slide 1 and second slide 2
The setting of the maximum extension stroke is based on the pair of left and right rail stoppers 10 provided at the left ends of the left and right outer ball guides 4 of the first slide 1 and the right ends of the left and right inner ball guides 5 of the second slide 2. The extension of the first slide 1 and the second slide 2 is prevented by abutting against both ends of each ball retainer 8 between a pair of left and right shaped rail stoppers 11 provided in the section. Each ball retainer 8 also has the function of a stopper for preventing the extension of both slides 1 and 2 (see FIG. 2).

Further, the maximum extension strokes of the second slide 2 and the third slide 3 are set in the same way as above, and the rail stopper 12 provided at the left end of the upper left and right outer ball guides 6 and the left and right inner ball guides 7 are set. The extension of the second slide 2 and the third slide 3 is prevented by abutting against both ends of each second ball retainer 9 between the rail stopper 13 provided at the right end, and the second slide 2 and the third slide 3 are prevented from extending. The second ball retainer 9 also has the function of a stopper for preventing the extension of both the slides 2 and 3.

In the above-mentioned conventional slide rail, when the slides 1, 2, and 3 are extended, a compressive load F accompanied by a strong impact is applied to the ends of the ball retainers 8 and 9.
is loaded, and the slides 1, 2, and 3 repeatedly expand and contract, causing the ball retainers 8 and 9 to become clogged, and the ball retaining holes to be deformed, making it difficult for the balls to roll. , 3 may not be able to extend and retract smoothly, resulting in problems such as loss of its function as a sliding medium.

This invention relates to an improvement of a slide rail using a pair of separated ball retainers as described above, and allows both ball retainers to elongate without applying any compressive load. Utilizing this structure, a stopper mechanism is formed at the center of the first and second slides where both ball retainers form an interval, and the maximum extension stroke can be appropriately set. To provide a slide rail capable of properly holding a ball retainer itself while solving the problem and fully exhibiting its function as a slide mechanism component.

Hereinafter, a specific embodiment of this invention will be described in detail based on the drawings from FIG. 3 onwards. Note that the following description will be made using a slide rail configured with three slides as a representative example, similar to the above.

A first slide 14 made of a metal elongated plate is fitted with a second slide 15 similarly made of a elongated plate so as to be expandable and retractable in the longitudinal direction, and the left and right edges of the first slide 14 are folded in the longitudinal direction. Left and right inner ball guides 17 formed by bending the left and right edges of the second slide 15 in the longitudinal direction are opposed to the inner sides of the left and right outer ball guides 16 formed by bending, and the left and right inner ball guides 17 are formed by bending the left and right edges of the second slide 15 in the longitudinal direction. A pair of left and right ball retainers 18, as shown in FIG. 4, are interposed between the ball guide 17 and the ball retainers 17, respectively.
The structure is such that the first slide 14 and the second slide 15 can mutually expand and contract by using this as a medium.

As shown in the figure, the ball retainer 18 has a shape in which ribs 18a are provided on the upper and lower sides of an elongated cylindrical ball holding rod 18b, and a plurality of ball holding holes 1 are provided at intervals along the length of the ball holding rod 18b.
8c holds a ball 18d, respectively.

Further, a third slide 19 similarly made of an elongated plate is fitted to the second slide 15 so as to be expandable and contractible in its longitudinal direction, and an upper left and right upper stage is formed by bending the upper stage of the left and right inner ball guides 17 in the longitudinal direction. A third slide 19 is installed inside the outer ball guide 20.
The left and right inner ball guides 21 formed by bending the left and right edges in the longitudinal direction are opposed to each other. A second ball retainer 22 is interposed respectively, and the second slide 15 and the third slide 19 are configured to mutually expand and contract by using this as a medium.

The above-mentioned first slide 1 is thus made expandable and retractable.
4, the first slide 1 is
4. A rail stopper 23 made of a shaped piece that sets the maximum extension stroke of the second slide 15 is cut and raised toward the second slide 15, and also extends from the center of the second slide 15 in the lateral direction. It is made of a shaped piece that is bent in a convex manner in a direction away from the first slide 14 in the longitudinal direction to form a protruding strip 24, and that engages with the rail stopper 23 on the protruding strip 24 to prevent it from elongating. A rail stopper 25 is cut and raised toward the first slide 14. As a result of the above, the rail stoppers 23 and 25 are both located in the region passing between the first ball retainers 18.

Further, a rail stopper 26 for setting the maximum extension stroke between the second and third slides 15 and 19 is provided on the protruding portion 24 to prevent the third slide 19 from moving.
Correspondingly, a rail stopper 27 that engages with the rail stopper 26 is cut and raised toward the second slide 15 at the center portion of the third slide 19 in the lateral direction. ing. As a result of the above, both the rail stoppers 26 and 27 are arranged between the second ball retainers 22.

As a result of the above, the first slide 14 and the second slide 15 are engaged with the rail stoppers 23 and 25 in a state where their respective ends are joined, and the mutual extension of the slides 14 and 15 is prevented. Similarly, the second slide 15 and the third slide 19 are engaged with the rail stoppers 26 and 27 in a state where their respective ends are joined, and the mutual extension of the slides 15 and 19 is prevented. Ru.

This invention has the above-mentioned structure, and also provides a pair of left and right first retaining pieces 28 at the ends of the left and right outer ball guides 16 that form the partial joint portion of the first slide 14 and the second slide 15. A pair of left and right second retaining pieces 29 are provided at the ends of the left and right inner ball guides 17. Similarly, a pair of left and right third retaining pieces 30 are provided at the ends of the upper left and right outer ball guides 20 that form the partial joint portion of the second slide 15 and the third slide 19, and A pair of left and right fourth retaining pieces 31 are provided at the ends. Furthermore, the first retaining piece 28
The ball retainer 18 is interposed between the ball retainer 18 and the second retaining piece 29 with a play gap 32 (see FIG. 7), and the engagement between the rail stoppers 23 and 25 is achieved under the play space. The configuration is such that the maximum extension strokes of the first slide 14 and the second slide 15 are set. Similarly, the second ball retainer 22 is interposed between the third retaining piece 30 and the fourth retaining piece 31 with a play gap 32, and the rail stopper 26 and the rail stop After the engagement with the par 27 is achieved, the second slide 1
5 and the maximum extension stroke of the third slide 19 is set.

Each of the above rail stoppers 23, 25, 26, 2
The protruding positions of each of the ball retainers 18 and 7 are not limited to the above-described embodiment;
The rail stopper 23, 2 under the above-mentioned freeway
As long as the engagement of 5 is achieved, the first slide 14
The above-mentioned position may be an appropriate position of the partial joint portion when the second slide 15 is extended, and as long as the second ball retainer 22 is engaged with the rail stoppers 26 and 27 under the above-mentioned loose fitting. The above-mentioned partial joining portion may be in an appropriate position when the second slide 15 and the third slide 19 are extended.

In addition, each of the above rail stoppers 23, 25, 2
6, 27, each of the above slides 14, 15, 19
extends and each rail stopper 23, 25,
In order to reduce the impact when 26 and 27 engage, a cushioning material 33 made of an elastic material such as rubber is attached to either one of them.

With the above configuration, the maximum extension stroke of the first slide 14 and the second slide 15 is the same as the rail stopper 23 provided on the first slide 14 between the left and right ball retainers 18. rail stopper 2
5, which is provided at the center of the slide utilizing the separation space of the ball retainer 18, and is set by engagement with the first and second ball retainers 18.
The retainer 18 is ensured to be loose between the retaining pieces, and the retainer 18 is also properly held between the retaining pieces without falling off.

Similarly, the maximum extension stroke of the second slide 15 and the third slide 19 is that the second slide 1
Same as the rail stopper 26 provided in the third
It is set by engagement with a rail stopper 27 provided on the slide 19, and has the same effect as described above.

That is, the extension of the slide rail according to this invention is achieved by utilizing the separation interval of the ball retainer and using the rail stoppers 23 and 2 provided on the slide itself.
5 mutual engagement and said rail stopper 26 and 2
7. While being prevented by mutual engagement, the ball retainer 18 connects the first retaining pieces 28 provided on the left and right outer ball guides 16 of the first slide 14 and the left and right inner ball guides 17 of the second slide 15.
It is loosely installed between the second retaining pieces 29 provided on the holder and is held in such a way that it cannot be removed. Similarly, the second ball retainer 22 includes a third retaining piece 30 provided on the upper left and right outer ball guides 20 of the second slide 15 and a fourth retaining piece 31 provided on the left and right inner ball guides 21 of the third slide 19. It is held loosely in between and cannot be removed.

As a result, both the ball retainers 18,
Reference numeral 22 denotes the retaining pieces 28, 29, 3, even when the slides 14, 15, 19 are mutually extended.
It is not compressed to 0.31 and the expansion stroke setting purpose is achieved.

In the above explanation, this invention has been explained with respect to a slide rail composed of three slides, but depending on the implementation, for example, the first and second two slides 14 without using the third slide 19, 15
It may also be a slide rail configured with.

As described above, this invention uses a pair of separated ball retainers, and utilizes the structure in which both ball retainers are separated, so that the maximum Each rail stopper is provided to set the extension stroke, and each slide is prevented from extending each other by mutual engagement of each rail stopper,
In addition, the ball retainer, which is the sliding medium of each slide, is held between the retaining pieces of each slide without falling off and is inserted with a play gap, and the engagement of each rail stopper is effected under the play. Because of this structure, the ball retainer is not compressed even when the slides extend each other, and unlike conventional ball retainers, there is no strong impact on the ends when the slides extend each other. No compressive load is applied, and there is no risk of the ball retainer becoming clogged or the ball holding hole deforming, which will worsen the rolling of the balls, and it will continue to perform its function as a sliding medium. The mutual expansion and contraction of each slide is performed smoothly, the maximum extension stroke of each slide can be appropriately set, and no harsh noise is generated. Furthermore, since the ball retainer has no risk of compressive deformation as described above, it is also possible to use synthetic resin for the ball holding member of the ball retainer as in the embodiment.

[Brief explanation of the drawing]

Figures 1 and 2 show a conventional slide rail. Figure 1 is a plan view of the slide rail,
The figure is an enlarged plan view showing the interposed part of the ball retainer in the same slide rail. 3 to 7 show an embodiment of the slide rail according to this invention, FIG. 3 is a plan view of the slide rail, FIG. 4 is a perspective view showing a part of the ball retainer, and FIG. 5 is a plan view of the slide rail. 4 is a sectional view taken along the - line in FIG. 4, FIG. 6 is an enlarged sectional view taken along the - line in FIG. 3 when the slide rail is in a contracted state, and FIG. FIG. 14...First slide, 15...Second slide, 16...Right and left outer ball guides, 17...Right and left inner ball guides, 18...Ball retainer, 19...Third slide, 20...Upper left and right outer balls Guide, 21...Left and right inner ball guide, 22...Second ball retainer, 23,2
5, 26, 27...Rail stopper, 28...
First retaining piece, 29...Second retaining piece, 30...Third
Retaining piece, 31... Fourth retaining piece, 32... Play gap.

Claims (1)

[Scope of utility model registration request] The second slide is attached to a first slide made of a long thin strip plate, and the left and right edges of the second slide are placed inside the left and right outer ball guides formed by bending the left and right edges of the first slide in the longitudinal direction. Left and right inner ball guides formed by bending the left and right parts in the longitudinal direction are opposed to each other, and a pair of left and right ball retainers separated from each other is interposed between the left and right outer ball guides and the left and right inner ball guides, respectively. In the slide rail in which the first slide and the second slide are freely extendable and retractable in the longitudinal direction while the retainer slides, a central portion in the lateral direction of the first slide and the second slide that passes between both the ball retainers. are provided with rail stoppers consisting of cut-and-raised pieces that engage with each other to set the maximum extension stroke, and when the two slides are partially engaged at their ends, the two rail stoppers are engaged. The extension of the slide is prevented, and a pair of left and right first retaining pieces are provided at the ends of the left and right outer ball guides forming the partial joint portion, and a pair of left and right first retaining pieces are provided at the ends of the left and right inner ball guides. Two retaining pieces are provided, each of the ball retainers is interposed between each of the first retaining pieces and the second retaining piece with a play gap, and both of the rail stoppers are engaged under the loose fit. A slide rail that is characterized by the ability to