JPH0511781Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a telescoping slide rail that serves as a medium when two members are slidably assembled.

BACKGROUND ART Conventionally, slide rails in which a plurality of slides formed of metal strips are slidably fitted together in an extendable manner have been used in desk extractors, copying machine document transfer tables, and the like. In this slide rail, a slide guide formed by bending on both sides of the inner slide in the longitudinal direction is slidably fitted with the inner side of a slide guide formed by bending on both sides of the outer slide in the longitudinal direction via a ball retainer, etc. A slide guide bent on both sides of the inner slide in the longitudinal direction is slidably fitted inside the slide guide of the inner slide via another ball retainer or the like so as to be extendable and retractable.

When forming the slide guide for the above-mentioned middle slide, the applicant has developed the middle slide 2 as shown in FIG.
The left and right ears are raised up and further folded inward to form a slide guide 21 with a two-piece structure, and an outer slide 1 made of a metal strip plate is attached to the outer surface of the left and right slide guide 21 via a first ball retainer 4.
An inner slide made of a metal strip is extendably and retractably slid together on the inner surface of the left and right slide guides 21 via a second ball retainer. As shown in FIGS. 6 and 7, a stopper pin 6 is attached to the end of the 21.
is installed horizontally to act as a stopper when the ball retainer is extended.

Problems to be Solved by the Invention In the above slide rail, the slide guide 21 of the middle slide 2 has a folded structure, and its inner and outer surfaces are used as sliding surfaces for the ball retainer of the outer slide 1 and the inner slide. This has the advantage of reducing the bulk of the slide rail as a whole, but on the other hand, when the stopper pin 6 is repeatedly subjected to impact, the pin 6 becomes loosened, shifts its position in the axial direction, and collides with the slide guide.
This causes a problem in that the inner surface of the slide guide is damaged and the smooth sliding of each slide is hindered.

Means for Solving the Problems The present invention solves the above problems by raising the left and right ears in the longitudinal direction of the middle slide, and then folding the end parts of the left and right slide guides, which have a two-layered structure, to the outside or inside. The ball retainer is cut and bent to form a stopper when the first ball retainer or the second ball retainer is extended, which is composed of a raised piece and a folded piece.

Function In the present invention, the left and right slide guides of the middle slide have a two-layered structure as described above, and by cutting the ends of the left and right slide guides each having a two-layered structure outwardly or inwardly, the first ball retainer or the second ball retainer A stopper is formed when the ball retainer is extended.

One end of the first ball retainer or the second ball retainer collides with an extension stopper made of a two-layered structure of the above-mentioned inner slide, and the other end is touched by a normal cut-out piece or the like provided at the end of the outer slide or inner slide. The stoppers impact and the maximum extension stroke is set. The present invention relates to improving the stopper when the middle slide is extended.

The extension stopper of the above-mentioned middle slide is integrally formed by cutting and raising a slide guide with a two-layered structure, and problems such as the above-mentioned stopper pin loosening or misalignment due to repeated impacts, which impede the smoothness of sliding. It is possible to effectively solve this problem and form a stable stopper with no fear of deformation due to impact strength.

Embodiments Embodiments of the present invention will be described below with reference to FIGS. 1 to 5.

1 is an outer slide made of a metal strip, 2 is an inner slide, 3 is an inner slide, and 4 is an outer slide 1.
5 indicates a first ball retainer interposed between the inner slide 2 and the inner slide 2, and 5 indicates a second ball retainer interposed between the inner slide 2 and the inner slide 3.

The left and right ears of the outer slide 1 are raised in the longitudinal direction to form left and right outer slide guides 11, and the left and right ears in the longitudinal direction of the inner slide 2 are similarly raised, and the tips thereof are folded inward to form a two-layered structure. Left and right middle slide guides 21 are formed, and the middle slide 2 is joined to the inside of the outer slide 1 to connect the inner surface of the outer slide guide 11 and the middle slide guide 21.
the outer surface of the rising strip 21a of
The first ball retainers 4a and 4b, which hold the balls 42, are interposed between the opposing sides to form a sliding mechanism so that they are mutually expandable and retractable. Above rising strip 2
a forms an outer middle slide guide.

Further, the left and right ears in the longitudinal direction of the inner slide 3 are raised to form an inner slide guide 31, and the inner slide 3 is fitted inside the middle slide 2 to form an inner surface of the folded strip 21b of the middle slide guide 21. With the outer surfaces of the inner slide guides 31 facing each other,
A sliding mechanism is formed by interposing the second ball retainers 5a and 5b that hold the balls 52 between the opposing surfaces, so that they are mutually expandable and retractable. Above folded strip 2
1b forms an inner middle slide guide.

The above ball retainers 4a and 4b, 5a and 5b
As shown in the figure, the balls 42, 52 are attached to the bars 41, 51.
The left and right ball retainers are separated from each other.

In the above slide rail, the end portions of the two-layered left and right slide guides 21 of the middle slide 2 are cut outward or inward to form a stopper 7 during extension. The extension stopper 7 has a two-piece structure made up of an outer section 7a cut and raised from the rising strip 21a of the slide guide 21 and an inner section 7b cut and raised from the folded strip 21b. The connecting portion 7c is made to protrude to the outside or inside of the middle slide 2 and serves as a contact portion with the first or second ball retainer 4a, 4b, 5a, 5b. In the illustrated embodiment, a typical example is shown in which the stopper 7 during extension is made to protrude to the outside of the middle slide guide 21 to form the stopper of the first ball retainer.

The extension stopper 7 partially cuts and raises the heads of the rising strip 21a and the folded strip 21b so as to connect the tips of the inner section 7b and the folded strip 21b to each other. . 7d indicates the base material joining portion.

An extension stopper 7 made of a two-layer structure of the inner slide 2 collides with one end of the first ball retainer 4a, 4b or the second ball retainer 5a, 5b, and the outer slide 1 or the inner slide 2 with the other end.
Stoppers 8 and 9 made of ordinary cut-and-raised pieces provided at the ends of the two abut against each other, and the maximum extension stroke is set.

As mentioned above, the drawing shows that the extension stopper 7 made of the above-mentioned two-ply structure facing outward is formed at one end of the inner slide 2, and the stopper 7' is formed at the other end by a cut-out piece from a normal base part, etc. An example is shown below. Of course, the stoppers at both ends may have the same structure as the stopper 7 during extension.

The present invention makes it possible to form the extension stopper 7 on the slide guide 21 having the two-piece structure by the method shown in FIG. 5.

As shown in FIG. 1A, the middle slide 2 is installed in the long groove of the lower mold 10a, and when the upper mold 10b descends, the core 10d is elastically supported by the spring 10c in the upper mold 11.
presses down the upper surface of the base portion of the middle slide 2, and presses it down with the elastic force of the spring 10c to prevent harmful deformation during molding, and also
d The cutting blades 10e provided on the left and right sides cut into the head of the middle slide guide 21 having the above-mentioned two-layered structure,
The pressurizing part 10f connected to the outside of the cutting blade 10e compresses and deforms the connecting part 7c, and the cutting blade 10e cuts and compresses the tip side of the inner cut 7b, thereby forming the stopper 7 during expansion. do.

In this way, the middle slide guide 21 of the middle slide 2 has a two-layered structure, and while enjoying the advantage of reducing the bulk of the slide rail by using its inner and outer surfaces as guide surfaces for the ball retainer, this two-layered inner slide guide can be used. An extension stopper 7 made of a cut-and-raised piece is provided to set the maximum extension stroke with the outer slide 1 or the inner slide 3.

In the above embodiment, the extension stopper 7 is formed at the end of the middle slide guide, particularly at the end.

Effects of the Invention As explained above, according to the present invention, the left and right slide guides of the middle slide have a two-layer structure as described above, and by cutting the ends of the left and right slide guides having the two-layer structure outward or inward. , a stopper is formed when the first ball retainer or the second ball retainer is extended, and the above-mentioned middle slide guide has a two-layered structure, and the inner and outer surfaces thereof are used as guide surfaces for the ball retainer, while enjoying the advantage of reducing the bulk of the slide rail. By cutting and raising this inner slide guide, an extension stopper with excellent impact resistance can be formed.

The extension stopper of the above-mentioned middle slide is integrally formed by cutting and raising a slide guide with a two-layered structure, and problems such as the above-mentioned stopper pin loosening or misalignment due to repeated impacts, which impede the smoothness of sliding. This effectively solves the problem and provides a stable stopper that is free from deformation due to impact strength.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view of a slide rail showing an embodiment of the present invention, Fig. 2 is a cross-sectional view of the slide rail, Fig. 3 is a side view showing the slide rail in its maximum extended state, and Fig. 4 The figure is a front view showing the stopper when the middle slide is extended.
C is a cross-sectional view of a molding die illustrating step by step the processing method of cutting and molding the stopper during elongation;
The figure is a cross-sectional view showing a stopper when the inner slide is extended in comparison with the present invention, and FIG. 7 is a side view of the slide rail when the inner slide is omitted and shown when it is extended. 1...Outer slide, 2...Inner slide, 21...
... Middle slide guide, 21a ... Standing strip,
21b...Folding strip, 3...Inner slide, 4
a, 4b...first ball retainer, 5a, 5b
...Second ball retainer, 7...Stopper during extension, 7a...Outer section, 7b...Inner section.

Claims (1)

[Scope of utility model registration request] The left and right ears in the longitudinal direction of the inner slide made of metal strips are raised up, and the ends of the left and right raised parts are folded back inward to form left and right slide guides with a two-layered structure, and a first groove is formed on the outer surface of the left and right slide guides. An outer slide made of a metal strip is telescopically slid together through a ball retainer, and an inner slide made of a metal strip is telescopically slid onto the inner surfaces of the left and right slide guides via a second ball retainer. In the slide rail, the ends of the two-layered left and right slide guides are cut outward or inward to form a stopper when the first ball retainer or the second ball retainer is extended, which consists of a raised piece and a folded piece. A slide rail characterized by: