DE1886099U - WINDING DEVICE, IN PARTICULAR FOR A PROJECTION WALL. - Google Patents

Description

Winding device, especially for projection walls.

The "price increase" relates to a winding device for winding a rollable track, in particular a projection screen, a map or the like., With a spring shaft 'to take the train.

üs is already known, roll-up projection screens, for example from canvas odj% 'l., ^ it to a spring shaft provided, through the project wall in the manner of a hollos unwound and by the spring tension of the spring shaft can be rewound automatically. It is common to encapsulate the spring shaft, either in a square one Box or in a slotted tube, which is provided at its ends with bearing caps for mounting the spring shaft ends is. When winding and unwinding the projection screen remains the slotted tube at rest, while the spring shaft is rotated in the tube, so that depending on the Dreinrichtung the Projection screen is unwound or rolled up. It will the projection screen through the relatively narrow one Slot of the pipe baw. executed.

A winding device designed in this way for projection walls is disadvantageous in several respects because of the design of the slotted tube. 2in times is through the slotted tube increases the cost of manufacturing the winding device due to the cost of materials. Furthermore is

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the assembly of the spring shaft in the slotted tube is proportionate awkward * Finally still occurs in the Use the compartment part on that when winding up or unwinding the projection screen at one of the through the slot slides along the edges formed in the pipe and is therefore exposed to considerable wear and tear « This constant sliding along the track on the Schli'tzkanten is particularly disadvantageous when using the ". Winding device for maps or otherwise printed Rails, as the pressure is removed as a result of the mechanical stress caused by the edges with frequent use will.

The! Inflation suggests a winding device at which the spring shaft is rotatably mounted in a bracket, which in the area of the wound web is at a distance of of the spring shaft, G-eiaäss an embodiment of the The hiring consists of a metal rail, ■. preferably a tube with flattened and angled .oehenkelii, in which the leather shaft by means of pegs in corresponding Openings - is supported.

In the case of the winder according to the hiring The previously common slotted tube has been replaced by the simple bracket. This hanger is easy to manufacture and easy to assemble. unwound web with the bracket practically not at all in contact so that no "wear effect" occurs. In this context, the design of the bracket as a tubular rail is particularly advantageous, since this shape of the bracket is not sharp. Edges result through which could damage the wound or unwound web.

In the rolled up state, the web is bz? «R. the projection screen according to another suggestion of the innovation ^

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a locking device attached to the end of the track, for example in the form of a rail running across the width, whose cross-section is larger than the distance between the bracket and spring shaft, held in such a way that the under tension standing spring of the spring shaft is not completely relaxed. :

An advantageous embodiment of the inflation is in shown in the drawings.

Show it:

Fig.l: an embodiment of the new winding device in a longitudinal view,

Fig. 2: the winding device according to Fig. 1 in

Cross-section with the web completely wound up, ".

3 'shows the winding device according to FIG. 1 in a side view.

The winding device according to the! Price increase is particularly advantageous for projection screens, for example made of canvas _? suitable for large maps and the like. But it is also possible to use the device for any other type of rollable film or web.

The web to be wound up, for example a projection screen 1, is wound onto or unwound from a spring shaft 2. The spring shaft 2 can be designed in the usual way. At the ends of the spring shaft 2 pins 3 and 4 are provided with which the shaft is mounted in a bracket. ! G-emäss inflation ^ / is this holder from a bracket of the 5y with angled "'- legs 6, 7 and includes the spring shaft 2, wherein the pin ^' Iind% each in correspondingly formed recesses 8 (Figure 3) The pins are advantageously of different cross-sections, namely in such a way that the pin 3 facing the spring mechanism of the shaft is non-rotatable, for example, by means of an angular cross-section ^ is supported in the tendon 6,

while the other pin 4-, for example of circular cross-section, is rotatably mounted in the shank 7.

Ss is particularly advantageous to design the bracket 5 as a drill, as can be seen from Fig.2. This tube is led along at a distance from the spring shaft 2, each flattened and angled at the ends so that the legs 6 and 7 are formed. Due to the distance between the bracket and / or the Eohres from the shaft, a trouble-free Unwind the projection screen from "the YiTeIIe guaranteed.

For use, the winding device is expediently attached to the bracket 5 in a stationary manner with a suitable hanger 9. The projection screen 1 can then be pulled out. be, for example with a corresponding handle 10 at the lower, free end of the projection screen. The extension and retraction takes place in the manner of a roller blind. ~ ^:

When rolled up, the free end of the projection screen becomes through a running across the entire width, for example, circular rail 11 held. The diameter this rail 11 is. accordingly selected so that sliding through between the bracket 5 and the spring shaft 2 is prevented (Fig. 2). This allows the spring mechanism the device does not expire.

Claims (5)

1 *) Winding gate device for winding a rollable track, -. in particular a projection screen, a map, etc. ", with a spring shaft for receiving the web, characterized in that the spring shaft (2) is rotatable in a bracket (5) is mounted, which is at a distance from the spring shaft (5) in the area of the wound web (l). 2.) Device according to claim 1, characterized in that the bracket made of a metal rail, preferably a tube, with flattened and angled thighs. (6,7) exists, in which the liYelle (2) by means of pins (3, 4) in corresponding Openings (8) is stored. 3.) Door direction according to claim 1 and 2, characterized in that that the bracket (5) is provided with a suspension device (9). . . - 4.) Gate direction according to one of the preceding claims, characterized characterized in that the free band of the web (1.) is provided with a lock, e.g. a rail (ll) running across the width, the cross-section of which is larger than the distance between the bracket (5) and the leather shaft - (2) «" .. Bremen, the September 5, 1963 1 ' ¹ Ur the applicant: - Applicant:. Company Karl H.Blocker Bremen Altenwall 17/18