JPS6239727Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a slide rail comprising an outer rail and an inner rail that are telescopically and slidably combined with a ball retainer interposed therebetween.

Conventionally, as shown in FIGS. 1 to 4, an inner rail 2 similarly made of a long thin strip plate is attached to an outer rail 1 made of a long thin strip plate, for example, as a slide rail for an extractor or a document moving table of a copying machine, as shown in FIGS. Left and right outer ball guides 1a, 1a are formed by bending the left and right edges of the outer rail 1 in the longitudinal direction, and left and right outer ball guides 2a are formed by bending the left and right edges of the inner rail 2 in the longitudinal direction. , 2a facing inside and outside,
Further, a ball retainer 3 made of a plate material is interposed between the outer rail 1 and the inner rail 2, and the left and right two rows of balls 3a aligned and held on the left and right edges of the ball retainer 3 are connected to the left and right outer ball guides 1a. A known structure is such that the inner and outer rails 1 and 2 are interposed between the left and right inner ball guides 2a, respectively, so that the inner and outer rails 1 and 2 can extend and contract while the ball retainer 3 slides.

Due to the purpose of the above slide rail, one of the inner and outer rails 1 and 2 is attached to the fixed side (desk or copying machine main body side), and the other is attached to the movable side (extraction or document transfer table side) (5a and 5b in the figure are the inner and outer rails). In order to attach the rails 1 and 2 to the fixed side or the movable side, bolt mounting holes are shown that penetrate from the inner surface of the rail to the back side. A stopper mechanism is essential to prevent the outer rail 1 and the ball retainer 3 from being pulled out from the inner rail 2 when extended and slid in the direction, and to ensure that the extraction or original moving table is stopped at the quantitative advance position.

Conventionally, as shown in FIG. 2, when the outer rail 1 is extended (assuming that the inner rail 2 is fixed), this stopper mechanism has been used to raise the front end of the retainer 3 in the advancing direction to the inner surface of the front end of the inner rail 2. A mechanism is adopted in which the raised cut and raised piece 6 is touched and, at the same time, the cut and raised piece 4 that is projected toward the inner surface of the rear end of the outer rail is applied to the rear end of the same and stopped at a fixed position.

Therefore, as described above, the outer rail 1 and the inner rail 2
When the bolts 8 are inserted into the mounting holes 5a and 5b from the inner surface of the rail to the fixed side or the movable side, respectively, the bolt head protrudes toward the center of the inner surface of the inner and outer rails. In order to avoid interference between the head and the ball retainer 3, the center part of the retainer 3 is bent convexly (convex curved part 3b) so as to extend to the middle part between the inner surface of the inner rail and the inner surface of the outer rail, and the inner surface of each rail is bent. A bolt relief space is formed in between and is available for use.

And the cut-and-raised piece serving as the stopper, especially the narrower inner rail 2 held inside the outer rail 1.
As shown in FIGS. 1 and 3, the cut and raised piece 6 is raised up to a height where it comes into contact with the convex curved portion 3b due to the presence of the bolt relief convex curved portion 3b, and is subjected to the raised stopper. There is.

However, recently, when there is a cut-and-raised piece 6 raised from the inner rail 2 that touches the end of the ball retainer (because the cut-and-raised piece 6 has a considerable height as described above), the outer rail 1 passes above the cut and raised piece 6 (from the state shown in FIG. 1 to the extended state shown in FIG. 4), the end 1' of the outer rail 1 and the cut and raised piece 6 accidentally collide. It has been pointed out that there is a risk of so-called finger-jamming accidents, such as injuries caused by fingers being caught between the fingers, and there is an urgent need to provide a means to prevent such dangers.

For example, Utility Model Application No. 58-59054 was proposed with the intention of preventing the above-mentioned finger jamming, but in this device, the cut-and-raised piece 6 itself, which causes finger jamming accidents, was left standing as it was. By placing a padding 7 like a step on the side of the retainer 3, the height of the dangerous raised piece 6 can be reduced as much as possible.
Although the mechanism is such that the minimum protruding end sufficient to abut the end (the front end of the bolt relief convex curved portion 3b) remains on the padding 7, in such a mechanism, the padding 7 is nothing more than a padding after all. Therefore, there is an unavoidable danger that the cut-and-raised piece 6 may fall off and be exposed again due to repeated shocks and long-term use (if it is left in the rail with falling off, there is a risk that the rail function itself may be damaged). Furthermore, although the padding 7 is intended to alleviate the dangerous vertical rise, the actual height from the inner surface of the inner rail remains the same, so there is a risk of fingers being pinched between the top surface of the padding 7 and the outer rail 1. remains.

The present invention fundamentally changes the conventional stopper mechanism using cut and raised pieces 6 and ball retainer 3, which have to be at a dangerous height that can cause finger-jamming accidents. It is an object of the present invention to provide a slide rail which can achieve the purpose of prevention and also has a more effective stopper function.

The basic structure of the slide rail according to the present invention is the same as that explained in FIGS. 1 to 4, and examples thereof are shown in FIGS. 5 to 9. Note that the same parts as above are indicated by the same reference numerals.

In short, the slide rail that is the base of the present invention is made up of an outer rail 1, an inner rail 2, and a ball retainer 3, as described above, and the outer rail 1 is joined to the inner rail 2, and the outer rail 1 and the inner rail are connected to each other. A ball retainer 3 is interposed between the two, and each row of left and right balls 3a held on the left and right edges of the ball retainer 3 is connected to the left and right outer ball guides 1a of the outer rail 1 and the left and right outer ball guides 1a of the inner rail 2. They are respectively interposed between the inner ball guides 2a, and are configured to slide in the extension direction or contraction direction while the ball retainer 3 slides.

In the slide rail, the present invention provides a unique stopper mechanism for stopping rail extension at a fixed position, which is effective in preventing finger pinching accidents when the inner and outer rails 1 and 2 are extended as described above.

To explain in detail below, as shown in FIGS. 5 and 8, the center part of the ball retainer 3 is connected to the inner rail 2.
is bent from the inner surface side toward the inner surface side of the outer rail 3 to form a bolt relief convex curved portion 3b' extending approximately in the middle between the inner surface of the inner rail 2 and the inner surface of the outer rail 1;
Spaces for the bolts 8 to escape are formed between the convex curved portion 3b' and the inner surface of the inner rail 2, and between the convex curved portion 3b' and the inner surface of the outer rail 1. The structure is such that interference between the bolt head and the ball retainer 3 during installation is avoided.

Further, on the left and right sides of the bolt relief convex curved portion 3b', there are convex curved portions 3c for inner rail stoppers extending close to the inner surface of the inner rail 2, and outer rail stoppers extending close to the inner surface of the outer rail 1. The convex curved portion 3d for

In the above, the convex curved part 3 for the inner rail stopper
c is lowered to the side of the convex curved part 3b' for bolt escape, and the convex curved part 3d for the outer rail stopper is raised to the side of the convex curved part 3c for the inner rail stopper. Holding portions of the balls 3a are arranged alternately at the outermost edge.

Convex curved part 3d for outer rail stopper depending on implementation
may be arranged inside the convex curved portion 3c for the inner rail stopper.

The convex curved part 3b' for bolt relief, the convex curved part 3d for the outer rail stopper, and the convex curved part 3c for the inner rail stopper are all parallel to each other and extend in the rail sliding direction.

One end surface of the crown part of the convex curved part 3c for the inner rail stopper thus formed is made to face the cut and raised piece 6' for the retainer stopper cut and raised toward the inner surface side of the inner rail 2, and the outer rail A cut and raised piece 4' for a retainer stopper in which the other end surface of the top of the convex curved part 3d for the stopper is cut and raised toward the inner surface of the outer rail 1.
to confront.

Both the cut-and-raised piece 6' for the retainer stopper on the inner rail side and the cut-and-raised piece 4' for the retainer stopper on the outer rail side have a tip plate thickness surface 6a', which is a cutout surface, as shown in FIG. 4a′ respectively to each convex curved portion 3c,
Facing 3d. Moreover, the cut height H from the inner surface of the rail is kept within the range of the plate thickness of the tip plate thickness surfaces 6a' and 4a', and each convex curved portion 3 that can be brought close to the inner surface of the rail
c, 3d. As already mentioned, the stopper mechanism in the conventional slide rail is to raise the cut and raised piece 6 from the inner rail 2 to a considerably high position from the inner surface of the inner rail to form a ball retainer 3 extending between the inner and outer rails 1 and 2. It is brought into contact with the convex curved portion 3b. As a result, this is a factor that causes the finger-jamming accident.

As mentioned above, the conventional idea of leaving this dangerous cut-and-raised piece 6 as it is and trying to prevent finger pinching by using other means such as stuffing that is likely to come off does not provide a fundamental solution. , Such a method causes an increase in the number of parts and the number of assembly steps, which in turn causes an increase in costs.

In addition, since the above-mentioned conventional cut and raised piece 6 has a high lifting margin, if the tip receives severe repeated impact (repeated collision with the end face of the ball retainer), it often tilts or breaks due to damage from the root. arise.

The present invention fundamentally solves the problems faced by the above-mentioned conventional products and devices.

That is, as already explained, the stopper mechanism of the present invention does not have a protruding height that is dangerous enough to cause the cut and raised piece 6' from the inner rail 2 to catch a finger, and the stopper mechanism of the present invention does not have a dangerous protrusion height that would cause the cut and raised piece 6' from the inner rail 2 to catch the ball. Due to the presence of the retainer convex curved portion 3c, a very small amount of protrusion is sufficient, which is about the thickness of the retainer to abut against it.

Cut and raised piece 4' from outer rail 1 and convex curved part 3d
The same applies to

Therefore, the purpose of preventing finger jamming can be effectively achieved without the need for assembling other parts such as padding as in conventional devices, and the root cause of finger jamming accidents can be eliminated. In addition, since the cut and raised pieces 6' and 4' only have to have the necessary minimum protruding height, they will not be damaged even under severe use such as repeated bumps and impacts, and a robust stopper mechanism can be constructed. .

[Brief explanation of the drawing]

Figures 1 to 4 show a conventional slide rail, with Figure 1 being a perspective view of a part of the slide rail, Figure 2 being a rear view of the slide rail, and Figure 3
The figure is a cross-sectional view of the slide rail, FIG. 4 is a longitudinal cross-sectional view of the slide rail, FIGS. 5 to 9 show slide rails according to embodiments of the present invention, and FIG. 5 is an exploded perspective view of the slide rail. Fig. 6 is a perspective view showing a part of the slide rail, Fig. 7 is a vertical cross-sectional view of the slide rail, Fig. 8 is a cross-sectional view of the slide rail, and Fig. 9 is the tip of the cut and bent piece of the inner rail. FIG. 1... Outer rail, 1a... Left and right outer ball guide, 2... Inner rail, 2a... Left and right inner ball guide, 3... Ball retainer, 3a... Ball, 3b'... Bolt escape convex curved part, 3c... Convex curved part for inner rail stopper, 3d... Convex curved part for outer rail stopper, 4', 6'... Cut and raised pieces for retainer stopper, 5a, 5b... Mounting hole , 8
……bolt.

Claims (1)

[Scope of utility model registration request] The inner rail is joined to the outer rail made of a long thin strip plate, and the left and right edges of the inner rail are folded longitudinally inside the left and right outer ball guides formed by bending the left and right edges of the outer rail in the longitudinal direction of the rail. The curved left and right inner ball guides are opposed to each other, and a ball retainer made of a plate material is interposed between the outer rail and the inner rail, and each of the two rows of left and right balls held on the left and right edges of the ball retainer is inserted. Interposed between the left and right outer ball guides and the left and right inner ball guides, and with the slide of the ball retainer,
In the slide rail configured to obtain telescopic sliding of the inner and outer rails, a convex curved portion for bolt relief is formed in the center portion of the ball retainer and extends approximately in the middle between the inner surface of the inner rail and the inner surface of the outer rail, and A convex curved part for an inner rail stopper extending close to the inner surface of the inner rail on the left and right sides of the convex curved part for the bolt escape, and a convex curved part for an outer rail stopper extending close to the inner surface of the outer rail. one end face of the top of the convex curved portion for the inner rail stopper faces a cut and raised piece for the retainer stopper cut and raised toward the inner surface of the inner rail, and the convex portion for the outer rail stopper A slide rail characterized in that the other end surface of the top of the curved portion faces a cut and raised piece for a retainer stopper cut and raised on the inner surface of the outer rail.