DE1701390U - PARALLEL GUIDE FOR SLIDING SCHOOL WALL BOARDS. - Google Patents

Description

PA.182988-Z53.55

P HO "H" I X-Engineer Operations TSI. Former construction officer Bruno

Baumann, Duisburg-Meiderich ^ eumühlerstr.lJO

Utility model registration ~

_: "Parallel guidance for movable -. ■" ■■ bare school turns afein "

Sign Β / Βο Duisburg-Meiderich, March 21, 1955

File number

With school blackboards that can be moved in the tertiary direction it has been found to be disadvantageous that the writing surfaces either tilt diagonally, are difficult to move, or knock in the guides. The ^ ssr disadvantage occurs entirely especially in those constructions in which the writing surfaces individually or in groups one behind the other in side guides and doing so Gede to be balanced by counterweights that each writing surface can be adjusted independently of the other. This board construction is often used in chemical rooms with extraction shafts behind the writing surface or with projection areas located behind the writing surfaces used. Attempts have been made to remedy this problem in the most varied of ways. So were continuous Gear drives, angle guides, boom suspensions etc. used, However, in addition to high production costs, they have a number of other disadvantages.

The new construction according to the invention is in several Specimens subjected to a longer practical test and, according to the unanimous judgment of the experts, has proven itself to be the best. It consists of the writing surface 1, (or stick-on screen and the like) the walk in the two pylons 2. These pylons 2 can have special guide shafts for the counterweights in their interior 5 have. The guide rails 3, in which the roller sets 4- run, are attached to their inside. The counterweights 5 balance the weight of the writing surface 1 via the deflection roller 6.

the

The connection between the roller sets 4 and the writing surface 1 is made by the setting disk 7. This single setting disk 7 can be inserted into a slot in the roller set 4, which enables simple assembly of the writing surface 1. The support cable 8 runs invisibly in the guide rail 3 »which can expediently be disguised by a simple profile strip for a better appearance. The rollers 9 of the roller sets 4 are hemispherical in such a way that they engage in the corresponding pre-machined running surfaces of the guide rail and, through a snug fit in the guide rail 3 and shaping of the rollers 9, result in well-bearing running surfaces. The same running surfaces are also present in the rear part of the guide rail 3, so that the rollers 9 also run in the same way in the rear part of the guide rail 3 when the writing surface 1 is shifted sideways by a very small amount of play between the rollers 9 and the guide rail 3 as in the front part. This means that the M- uno roller sets are guided absolutely securely. so that the writing surface 1 guaranteed. Since the writing surface 1 can be equipped with etching at all four corners or even more frequently with rollers, precise guidance of the writing surface 1 between the pylons 2 is guaranteed

It has been found to be advantageous if the rollers 9 are made of plastics, e.g. rotating or pressing rollers made of nylon, Perlon, To manufacture synthetic resin products, etc. Doing this is handy prevents noise. Continue to assign roles when using appropriate materials made of the aforementioned substances, there is hardly any wear. It has also proven to be turned out to be advantageous, the rollers 9 as well as the pulley 6 run on ball bearings, for example. permit. As a result, it is now possible with the construction according to the invention that Writing surfaces are easy to move despite precise guidance. When the roller sets 4- at their exit the guide rail 3 with noise-reducing substances e.g. Leather, PVC foils or the like are clad is practically every annoying G-noise that occurs with longer operation should be possible.

In addition to the special advantage outlined above, what has been said so far has been particularly welcomed that

the

Claims (1)

PÄ.1S2983-25.3.55 the cross-sections of the pylons, especially with regard to can be kept much lower on the depth, what as well as. the lack of upper "" cladding turns out to be has turned out to be very beneficial. Protection claims: 1. Parallel guidance for movable school boards thereby .Identified that specially shaped sets of rollers 4 in guide rails matched to these roller sets run so that with the slightest play perpendicular to the running axis of the rollers, they are the same in both directions ■ have a good and firm running surface. 2. .Parallel guidance for moving blackboards to Claim 1 characterized in that the rollers 9. the roller sets 4 made of plastics such as nylon or PVC material exist. 5. Parallel guidance for shifting school boards according to Claim 1 and 2, characterized in that the connection between the roller sets 4 and the writing surfaces 1 is carried out by means of an adjusting disk 7.