JPS6239726Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a telescopic slide rail used for a copying machine's original moving table, extraction, etc., and particularly to the structure of an inner slide that is a sliding medium of the slide rail.

Conventionally, a first rail 1 and a second rail 2, which are made of channel-shaped metal elongated strips, are joined together facing each other, and a ball retainer 3 is interposed between both rails 1 and 2, and a ball retainer 3 is inserted between the left and right edges of the first rail 1 and the second rail 2. Each row of the held balls 3a is interposed between an outer ball guide 1a formed by raising the first rail 1 left and right and an inner ball guide 2a formed by raising the second rail 2 left and right. Ball 3 in ball retainer 3
A telescopic slide rail in which the first and second rails 1 and 2 are expanded and contracted through the rolling of the rails a is well known.

The ball retainer 3 has balls 3a held on a ball holding plate 3b made of a metal plate.
Normally, while the balls 3a of the ball retainer 3 function as rolling means, the first rail retaining protrusion 7 cut and raised toward the inner surface of the first rail is applied to one end surface of the holding plate 3b of the ball retainer 3, and the retainer and others Both rails 1 and 2 are provided with a mechanism in which a second rail fixing protrusion 6 cut and raised toward the inner surface of the second rail is applied to the end surface.
It also has a stopper function to prevent the elongation of the material.

That is, as shown in FIG. 2, the first rail 1 and the second rail 2 overlap each other at least by the length of the retainer 3, and the first rail stopper protrusion 7 and the second rail stopper protrusion 6 overlap. The entire length of the holding plate 3b of the ball retainer 3 is sandwiched between them, and each rail 1, 2 requires an extra length equal to the length of the retainer 3 in advance, that is, taking into account the overlapping margin at the end of the rail. It is said that In addition, in the ball retainer 3, the head of the bolt 8 that attaches one of the first rail 1 and the second rail 2 to the moving side and the other to the stationary side protrudes into the inner surface of the rail, so the center part of the ball retaining plate 3b is attached to the bolt head. The bending process is performed in the middle of the gap between the first and second rails 1 and 2 so as not to interfere with the parts, and if edge bending process for the ball holding part etc. is added, the entire bending process will be complicated.

Furthermore, since the ball holding plate 3b is bent in the above-mentioned form for the above-mentioned reason, the rail-stopping protrusions 6 and 7 that inevitably protrude toward the inner surface of the rail, especially the second rail that fits inside the first rail, The protruding piece 6 is required to be raised to a height exceeding about half the distance between the opposing rails 1 and 2, and this has been viewed as a major cause of finger-picking accidents in recent years.

Furthermore, if the first rail 1 and the second rail 2 are made of metal plates, and the ball retainer 3 is also made of a metal plate, the rail-stopping protrusions 6 and 7 will move against the ball retaining plate 3b with considerable force. Since it collides with the end face, it also has the disadvantage of producing an unpleasant metallic sound due to the impact.

The present invention solves the mechanical problems of the conventional products described above, and also achieves structural simplification, cost reduction, etc.

Embodiments of the present invention are shown from FIG. 2 onwards, and FIGS. 3 to 8 show the first embodiment, FIG. 9 the second embodiment, and FIG. 10 the third embodiment.

In the present invention, unlike the conventional slide rail which is configured to obtain expansion and contraction using a rolling means such as the ball retainer as a medium, the present invention achieves the expansion and contraction through a sliding medium that utilizes surface-to-surface sliding. It is assumed that

In each embodiment, medium slides 10A, 10B, and 10C are provided as the sliding medium.

Both the first rail 11 and the second rail 12 are made of metal elongated strips, and the rails 11 and 12 are joined together so as to be expandable and contractible in the longitudinal direction, and the first rail 1
1 and the second rail 12, the middle slide 10A,
10B and 10C are interposed, and the middle slide 10A,
10B and 10C are used as sliding media to achieve the above expansion and contraction.

The middle slides 10A, 10B and 10C have rail sliding portions for allowing the first and second rails 11 and 12 to slide and expand and contract.

Slide 10 in Figure 3 and Figures 6 to 8
A has protruding rails 13 on both sides thereof that extend in the rail longitudinal direction and have an arc-shaped outer surface, and the protruding rails 13 are formed by rising both side edges of the first rail 11 to form an inward bending slide in the rail longitudinal direction. An L-shaped grooved rail 15 that is held in place by the guide 14 and slidably engages with the first rail 11, is open on the inner side of the projecting rail 13 on the surface facing the second rail 12, and penetrates in the longitudinal direction of the rail. An L-shaped outward bending sliding guide 16 formed by further bending the raised ends of both side edges of the second rail 12 outward is slid into the groove rail 15.
A sliding fit with the rail 12 is obtained.

Between the left and right sliding parts of the middle slide 10A that has been slid together as described above, one end is open on the surface facing the first rail 10, and the other end is a stop in the forward direction in the longitudinal direction of the rail, which is blocked from passing. A groove 17 is formed.

Similarly, a reverse one-stop groove in the longitudinal direction of the rail is open at the other end and blocked from passage at one end on the surface opposite to the surface on which the forward one-way stop groove 17 is formed, that is, the surface facing the second rail 12. form 18. A partition wall 19 forming the bottom wall of both grooves is formed between the forward direction single stop groove 18 and the reverse direction single stop groove 17, and both grooves 17 and 18 extend in parallel with the partition wall 19 as a boundary.

Further, the groove side wall 20 in the longitudinal direction of the rail which defines each stop groove 17, 18 together with the partition wall 19 is connected to both grooves 17, 18.
The groove rails 15 are opened to the outer side of the groove side wall 20 on the second rail 12 side, and the second
The rail 12 is inserted into the L-shaped groove rail 15 while holding the outer surface of the groove side wall 20 with the raised portion of the L-shaped sliding guide 16, and the inner surface of the raised portion of the L-shaped sliding guide 16 and the groove side wall are inserted into the L-shaped groove rail 15. The configuration is such that a sliding fit is obtained at the contact area 21 with the outer surface of the holder 20. In this case, a sufficient gap 22 is formed so that the end face of the sliding guide 16 does not come into contact with the end face of the groove rail 15.

A bolt insertion hole 38 is provided through the partition wall 19 in which each of the stop grooves 17 and 18 extends, which corresponds to the bolt hole provided at the end of the first and second rails 11 and 12 when the rails are extended. .

As described above, the stop grooves 17 and 18 which open in opposite directions are formed in the middle slide 10, and as shown in FIG. Positive direction single stop groove 1
A first rail stopper 23 is loosely fitted into the groove from an open opening at one end thereof and engages with a first rail stopper 34 at the other end of the groove.

Similarly, when the rail is extended, a second rail retaining member 35 is loosely fitted into the reverse direction one-way retaining groove 18 from the other end on the inner surface of the end portion of the second rail 12, and is located at one end of the same groove.
A second rail stopper 24 that engages with the rail is provided.

Protrusions 23' and 24' may be provided in combination with the above-mentioned protrusions 23 and 24 to collide with the slide end surface during rail contraction. The inner slide 10A having the above-mentioned structure can be made into an integrally molded product of synthetic resin.

FIG. 9 shows another example of the structure of a middle slide 10B and a slide rail to which this is applied. That is, the middle slide 10B has a pair of protruding tracks 25 on both sides thereof, which extend in the longitudinal direction of the rail and have arcuate outer surfaces.
The projecting track 25 is held by an inwardly bent sliding guide 26 in the longitudinal direction of the rail formed by rising both side edges of the first rail 11 to achieve a sliding engagement with the first rail 11. It has another pair of protruding tracks 27 in line with the protruding tracks 25, and the protruding tracks 27
This figure shows a structure in which the slide guides 28 are bent inward in the longitudinal direction of the rail and formed by rising up both edges of the second rail 12 to achieve a sliding engagement with the second rail 12.

In addition to the above-mentioned sliding structure, a second stopper groove 29 in the forward direction is formed on the surface facing the first rail 11 in the same manner as described above.
A reverse stop groove 30 is formed on the surface facing the rail 12. The first rail stop 32 and the second rail stop 33 at the end of each stop groove 29, 30 are formed by punching out or cutting out from the partition wall 31 as shown.

On the other hand, when the middle slide 10A is integrally molded from synthetic resin, the first and second rail stops 34 and 35 at the end of the one-way stop groove can be formed from resin-molded walls. In addition, the middle slide 10A or 10B is formed from an extruded aluminum product, cut to a predetermined length, and as shown in FIG. A telescopic slide rail 10C is presented in which this is used as the first and second rail stops 36 and 37. Of course, the configurations described for the telescopic slide rails 10A, 10B, and 10C can be used in combination with each other according to the gist of the invention.

Conventionally, slide rails using ball retainers have had the rail stops of the first and second rails abut against the end of the ball holding plate of the retainer to act as a stopper during extension, which has caused various problems. As already mentioned.

In the present invention, the rail stoppers 23 and 24 are a stopper mechanism that passes through both stop grooves 17, 18, 29, and 30 and collides with the first and second rail stops 32 and 37 at the back thereof to stop the extension. By freely setting the height of each rail stop from the rail stop protrusion 23,2
4 can be set to the minimum necessary height, and a design that eliminates the cause of finger jamming accidents can be easily made. On this occasion,
As the first rail 11 and the second rail 12 are extended, the heads of the bolts for attaching both rails can be released without any problem due to the presence of the two stopper grooves 17, 18, 29, and 30.

While obtaining the above effects, the structure of the inner slide can be simplified, and it can be easily manufactured as a molded product. For example, by using a resin molded product, impact noise (metallic sound) caused by collision with the first and second rails 11 and 12 can be greatly reduced.

Furthermore, in the present invention, as a stopper mechanism when the first rail 11 and the second rail 12 are extended, each rail stop protrusion 23, 2 is provided at the groove end extending in opposite directions.
Since it is a mechanism that obtains a collision with 4, the middle slide 1
0A, 10B, and 10C can function as a stopper mechanism while contributing to a part of the extension stroke. In other words, the first rail 11, the second rail
It is possible to design the length of the rail 12 to be shortened by that amount. However, in the above condition, rail 1
It is optional to make 1 and 12 longer so that they overlap each other.

In addition, whether the middle slides 10A, 10B, and 10C are made of aluminum or synthetic resin, they contribute to weight reduction, simplify the structure, and have the advantage of being extremely easy to assemble, which in turn can reduce costs. .

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view showing a representative example of a conventional telescopic slide rail, Fig. 2 is a longitudinal sectional view thereof, Fig. 3 is a sectional view showing an embodiment of the telescopic slide rail according to the present invention, and Fig. 4A. The figure is a vertical cross-sectional view showing the rail in a contracted state, Figure B is a vertical cross-sectional view showing the rail in an extended state, Figure 5 is a perspective view of the inner slide of the rail as a sliding medium, and Figure 6 is a plan view of the same. , FIG. 7 is a longitudinal sectional view of the same, FIG. 8 is a front view of the same, FIG. 9 is a front view showing an end face of a telescopic slide rail showing another example of the present invention, and FIG. 10 is a still another example. It is a longitudinal cross-sectional view of a telescopic slide rail. 10A, 10B, 10C...Medium slide, 11
...First rail, 12...Second rail, 13,2
5, 27...Protruded rail, 14,26,28...Inward bending sliding guide, 15...Groove rail, 16...Outward bending sliding guide, 17,29...Forward one-way stop groove, 1
8, 30...Reverse direction one-way stop groove, 23...First rail stopper, 24...Second rail stopper, 32,3
4, 36...First rail stop, 33, 35, 37
...Second rail stop.

Claims (1)

[Claims for Utility Model Registration] (1) A first rail and a second rail made of elongated strips are joined together so as to be expandable and contractible in the longitudinal direction, and an intermediate slide is interposed between the first rail and the second rail,
In the telescopic slide rail in which the above-mentioned expansion and contraction is achieved by using the middle slide as a sliding medium, a vertical rail in the longitudinal direction of the rail is open at one end and blocked from passing at the other end on the surface of the middle slide facing the inner surface of the first rail. A directional stop groove is formed, and a reverse stop groove in the longitudinal direction of the rail is formed on the other surface facing the second rail and is open at the other end and blocked from passage at one end, and on the other side of the first rail. A first rail stopper is provided on the inner surface of the second rail, and the first rail stopper is provided on the inner surface of the second rail, and the first rail stopper is loosely engaged from one end into the forward one-way stop groove and engages with the other end of the groove when the rail is extended. A telescopic slide rail characterized in that a second rail stop protrusion is provided which is loosely fitted into the opposite direction one-way stop groove from the other end and engages with one end of the groove. (2) The telescopic slide according to claim 1 of the utility model registration claim, characterized in that the inner slide having the one-way stop groove in the forward direction and the one-way stop groove in the reverse direction is made of an integrally molded product of synthetic resin. rail. (3) Utility Model Registration The telescopic slide rail according to claim 1, characterized in that the inner slide having the one-way stop groove and the other-way stop groove is made of aluminum or an alloy thereof.