DE1604198C - Louvre for a fan blind - Google Patents

Description

3 4

Pin for holding the metal rod so long that the blind moves quickly to the position shown in FIG. 2

zubilden that the metal rod will take on the pin and without additional effort,

can slide forth, namely the pin then. In Fig. 3, the part of the blind is in the area of the

arranged so that the weight illustrates pivot axis 2 in its closed position. You can see that the

slides forward and thereby the closing pressure 5 metal rod 6 through two pins 19 in a box

compared to the position already mentioned, the somewhat shaped housing 20 of the blind is held. It

elevated. can also only be in this sectional view

In the drawing, an embodiment of the one pin 19 is act, and there are then several

Invention shown. In this illustration it shows cones lying one behind the other

Fig. 1 is a schematic side view with the io provided for holding the metal rod6, the

Plastic lamellae in the closed position, not only have to show a circular cross-section

F i g. 2 the same in the open position, sen, but also elongated or in any other

F i g. 3 a section of the previous Fi- shape can be formed. The housing 20 is

guren on a larger scale. closed by a lid 18, and the

In Fig. 1, the fan louvre with 1 and the 15 cover 18 penetrating pin 19 can with

The pivot axis of the same is denoted by 2, the cover being connected to the cover by means of hot air or the like

Metal rod 6 offset from the pivot axis 2 be welded, so that in an advantageous manner

is arranged so that results in the rivet-like connection illustrated here.

Closed position a distance c between the heavy Of course, the housing 20 can be made so large

point G of the metal rod 6 and the pivot axis 2 20 be that it receives the metal rod 6 straight. in the

arises: This creates a clockwise motion. 3 is each

ment M = c XG by the weight G of the metal but the housing 20 is kept so large that the

Stabeso formed that the closing pressure of the blind tallstabö on the pin 9 during the movement of the

reinforced. Blind 1 can slide back and forth. In the in F i g. 3

Nevertheless, the metal rod 6 is suitable; the metal rod 6 is in the closed position illustrated in FIG

Position the blind to form a counterweight, as then slide to the right to achieve the position shown in FIG. 1 already

F i g. 2, thereby increasing the weights on both sides of the axis 2 mentioned moment arm c , while he

are almost balanced. In Fig. 2 is namely to in the open position according to F i g. 2 will move down,

the pivot axis 2 is a clockwise moment that would be shown in FIG. 3 to the left, which means that the

by the weight Gl X b and a counterclockwise pivoting range effective lever arm a, see Fig. 2,

Moment a XG formed. Of course, G takes action on being enlarged a little when there is a bigger game

Center of gravity of the metal rod 6 . The weight of the between the pin 19 and the holes of the

Metal rod G can be chosen so that the at-rail 6 is provided.

the mentioned moments almost in equilibrium. In addition, the axes 2 can be interchangeable

are. It is true that the lever arm b is held between the one on 35 in order to prevent it from corrosion if necessary.

To replace the center of gravity adjacent weight G 1 and the fixed axles. The metal rod 6

Axis 2 is much larger than the lever arm a, but can be interchangeable, that is, before it is installed

this disproportion can be decided by the much higher 'how difficult the built-in

Weight of the metal rod 6 should be balanced, tallstab. In this way the weight of the

whose weight can also be changed to keep it variable, as is the case with the metal rod. After installation

thinks that it will adapt to the various requirements. it is usually necessary to replace the metal rod 6

The point here is that according to FIG. 1 of which may not be required. This results in the

Closing pressure is now increased and the air pressure is part of the fact that with completely identical execution of the yes-

of the fan must be able to dissolve it 1 different weights of the metal rods

lift, even if only for a brief moment, 45 can be installed.

1 sheet of drawings

Claims (8)

1 . The above-described lamella shows the great prior patent claims: Partly that 8 ^ overfs can be swiveled out into an almost horizontal position with a very low opening pressure. 1. Slat for a fan shutter, from 5 The invention is based on the object Flat material made, swivels around an axis to increase the closing pressure of the lamella without reducing the and to give up a smaller inflow called advantage above the axis. surface with an additional weight, According to the invention, this object is achieved during the inflow located under the axis that the metal insert in the form of a metal surface is larger and has a smaller rod relative to the pivot axis so offset in weight, the thin, made of plastic, is that in the closed position between the fabric-made lamella above the axis has a pivot axis and the metal rod has a torque pocket in which a stabilizing and increases the closing pressure. It is adversely metal insert is inserted, it is advantageous that in the open position the weights which at the same _time: below axis 15 are nearly balanced on both sides of the axis,
specifies, according to main patent 1295 785, that in this way the metal rod is used not only characterized in that the metal to stiffen the blind, as was already proposed by insert in the form of a metal rod (6) compared to the main patent, but if the pivot axis (2) is so offset, the closing pressure in the closed position is also increased between the 20 in the closed position (Fig. 1) by the same metal rod that is above the pivot axis (2) and the metal rod (6) In addition, it is also used as a weight rail to generate ■ torque (G X c) that almost increases the closing force of the blind in its open position. . so that only a very small amount of air 2. Device according to claim 1, characterized by current required to maintain this position indicates that 25 is in the open position (FIG. 2). In extreme cases, the metal rod can be so heavy the blinds the moments on both sides of the and the distance of the same from the axis so great, Axis (2) are almost balanced. that a complete weight compensation occurs. 3. Apparatus according to claim 1, characterized in this, of course, pre-characterizes this according to the invention, that the weight (G) of the metal still go a certain, albeit small, open rod (6) is changeable. 30 ventilation pressure of the fan required because the closing 4. Apparatus according to claim 1, characterized by pressure now compared to the embodiment according to indicates that the main patent is increased on the blind (1) pin (19). Arranged in a further configuration on which the metal rod (6) can, according to this idea, however, be in is slidable. its weight can be changed so that optional 5. Apparatus according to claim 4, characterized in that a cover (18) over the metal louvre, a larger or smaller metal rod per tallstab (6) is arranged, so that this is arranged in one as required can be built in.
Housing (20) lies. '' To attach the one used as a weight rail 6. Apparatus according to claim 4, characterized in that metal rods can advantageously pin indicates that the pins (19) are provided for the purpose of holding 40 onto which the metal rod can be pushed tion are deformed by hot air. is. In a further embodiment, a cover can be used 7. The device can be arranged according to one or more of the above the metal rail, so that this preceding claims, characterized in that it is in a box. It is particularly cheap draws that the axes (2) of the blind (1) from - to heat the cones with warm air, so that they are interchangeable. 45 according to the influence of the metal rod something like 8. Apparatus according to claim 4, characterized in that a rivet acts. In this way it is not possible indicates that the pin (19) is so long and that the lid is released again, and other means are arranged such that the metal rod (6) for fastening the lid to the blind are not required by the movement of the fan louvre (1). So this makes it a very easy one is moved. 5 ° and quick and safe closing of the lid achieved. The main patent provided that the metal rod represents a part embedded in the plastic. With the invention it is now possible to 55 metal rod retrospectively, d. i.e. after making the To assemble the blind and to load it through the cover The invention relates to a lamella for fastening. This is only one embodiment of the Fan blind that, made from flat material, required to make plastic slat that with different an axle swivels and weights can be fitted above the axle for various purposes smaller inflow area with an additional edge. has weight, while the one below the axis can further refine this idea Inflow area is larger and in relation to a small one also be provided that the axes of the blind neres weight, the thin ones made of art are designed to be interchangeable. Because it is necessary- fabric-made lamella above the axis one. borrowed in the event of a corrosive attack when the Has a pocket in which a stabilizing and moving blind works, for example in rooms where cor- heavy metal insert is inserted, which corrosion-producing vapors are sucked off, axles at the same time defines the underlying axis to be made of corrosion-resistant material. Main patent 1,295,785. It can also be beneficial to those already mentioned