DE19705572C2 - Sun protection device with ventilation - Google Patents

Description

The invention relates to a sun protection device for In installation outdoors or in uncovered rooms with a generally vertically erected mast on which vertical distance from the installation area radially foldable Shield arms, the flat elements for shielding Son wear rays, as well as a ventilation device are seen, the shield arms being part of the Ventila tion device and ro around the longitudinal axis of the mast animals.  

Such a sun protection device is known from the DE-OS 23 36 665.

Umbrella-shaped sunshades that protect people should protect against excessive sunlight, are proven to be in antiquity and possibly also been used long before. Still are in the recent times have always been improvements in such Parasols have been made. For example, is off DE 40 33 104 A1 a parasol known axially un below the screen element around the mast of the sun umbrella rotatable fan, which is mounted in the th state of the screen element from the bell-shaped Radially completely covered screen. The ventilation device has large fan blades, which has a large airflow even at low speed below the screen.

Another significant improvement to the usual sun schirms is described in EP 0 365 572 B1: the parasol is opened or closed using a solar drive be closed.

Another improvement is known from US 5,273,062, after which below the umbrella area of the parasol around the Mast around a radio is provided that is either battery should be operated or operated via solar cells, which are attached to the outside of the screen. Moreover contains the known sun protection device axially un Ventila rotating below the screen around the mast gate.

In contrast, the object of the present invention is that Handling a sun protection device at the beginning named way of improving.

According to the invention this object is achieved in that the Umbrella arms with increasing rotational speed after the Centrifugal governor principle can fold up. Be reversed the shield arms con fold in so that any position ent neither controlled nor automatic, for example by Use of a light sensor can be regulated.

If the sun protection device is not used, the Wind attack area is minimized by collapsing who the. The sun protection device is therefore in bad Weather especially protected from storms. Besides, it can also in operation continuously or step by step on fold down the shade arms and reduce the shadow effect be adjusted to actual needs.

An embodiment of the invention is particularly preferred appropriate sun protection device in which the ventilation device required to rotate the shield arms Obtains energy from photovoltaic elements. Such Sun protection device is self-sufficient and sunless depending on external energy supply. When Be cloud when no sun rays to power the Solar drives are available is also a function the ventilation device is not required.

The photovoltaic elements are conveniently located in the Arranged near the location of the sun protection device be possible around the power lines to the sun protection device  as short as possible. A further version is particularly compact extension of this embodiment, in which the photovoltaic Elements on the top of the flat elements for ab shielding from sun rays are arranged.

In a particularly preferred embodiment, it is preseeded hen that the shield arms when exceeding a certain Rotational speed in a rigid, fully extended Snap into position from which they also with decreasing rota speed does not automatically move in the direction again fold onto the mast.

In particular, several latchable intermediate positions can also be used be provided from which by increasing the rotation speed the next, extended position the umbrella arms or the end position can be reached. Should the umbrella arms to end the sun protection and ventila operation, the respective Ra most unlocked by an appropriate actuator become. As a result, the sun protection according to the invention directional stability.

The flat elements to shield the sun's rays can in a very preferred embodiment of the inventions Sun protection device according to the invention also as a buoyancy device Constructive aerodynamic surfaces are designed as on are known from the initially cited DE-OS 23 36 665 is. This creates when the flat elements rotate, which at the same time is a relative movement against the surrounding one Air causes a buoyancy towards the  Umbrella tip, which an opening process of the umbrella arms un supports.

In a development of the embodiment, the An Setting angle of the aerodynamic surfaces compared to the opposite air can be varied. This can increase the buoyancy increase or decrease.

A further development is technically particularly easy to carry out The angle of attack of the aerodynamic surfaces by changing the setting angle of these surfaces relatively is variable to the mast. The shield arms, which the aerodynamic surfaces only carry around their length axis can be rotated by a desired angle.

In a very particularly preferred embodiment of the The sunshade device according to the invention are the shield arms itself made flat, so the flat elements for Shielding sun rays into the screen, so to speak Marme integrated, so that no separate flat elements must be attached to the shield arms. Reduce this the manufacturing effort and increases the compactness and Construction stability.

In an alternative embodiment, the umbrella is attached men flexible, flag-like, flat elements on the edges consolidates. This allows easy folding or folding and unproblematic behavior of the sunshade Reach direction in stronger winds.

In a further, alternative embodiment, between the shield arms flat membranes with passage slides zen excited. This allows the total weight of the inventions  considerably reduce the sun protection device according to the invention, what also the folding or folding of the umbrella arms he relieved.

Another, preferred embodiment of the invention provides before that the shield arms vertically ver in the axial direction sets and are arranged "on gap". With that one can particularly concentrated airflow below the screen as well as more shading with a simple folding reach mechanism.

In a further advantageous embodiment, the Shield arms curved, preferably in a vertical plane. This results in an increased stability of the construction on.

An embodiment of the invention is also preferred he sun protection device, in which the umbrella arms are tangled tial attack on the mast, which in turn creates a good loading shading effect and an increased ventilation effect simple folding mechanism can be achieved.

An embodiment is particularly preferred in which the Shield arms in a locked position against the mast are braced, resulting in a high stability of the overall construction tion even in stormy weather.

Further advantages of the invention result from the Be writing and drawing. Likewise, the above mentioned and invented the features further invented in accordance with the invention individually for themselves or for several in be arbitrary combinations are used. The shown and The embodiments described are not intended to be final  Understand enumeration, but rather have exemplary th character for the description of the invention. The Erfin dung is shown in the drawing and is based on Exemplary embodiments explained in more detail. Show it:

Fig. 1a shows an embodiment of the sun protection device according to the invention schematically from the side, namely left in the closed and right in the open state;

Fig. 1b shows the embodiment of Figure 1a from above in ge open state.

2a shows an embodiment in the manner of a Greek windmill schematically from the side.

Fig. 2b the embodiment of Fig. 2a from above;

FIG. 3a shows an embodiment with aerodynamically make th surface elements in a folded to stand from the side;

3b shows the embodiment of Figure 3a in the extended state from the top..;

FIG. 4a is a schematic side view of a sun protection installation with rigid projecting Schirmar men and flag-like flat elements;

FIG. 4b is a top view of the sun protection device according to Figure 4a from above.

Figure 5a is a schematic side view of a collapsible embodiment, the left and right in the open in the closed state.

FIG. 5b shows a top view of the opened left embodiment from FIG. 5a; FIG.

5c is a top plan view of the closed right embodiment of FIG. 5a.

Fig. 6a is a schematic side view of a Ausfüh approximate shape with hinged umbrella arms, namely left in the open and right in the closed state;

Figure 6b is a plan view from above on the open left embodiment of Fig. 6a.

Figure 6c is a top plan view of the closed right embodiment of Fig. 6a.

Fig. 7a is a schematic side view of one embodiment of having vertically staggered and offset azimuthally staggered screen arms;

7b is a schematic plan view from above of the embodiment according to Fig. 7a.

8a shows an embodiment with tangentially acting on the mast, foldable umbrella arms and photo voltaic elements for supplying energy in a schematic side view.

8b is a plan view from above of the embodiment of Figure 8a in the open state..;

Figure 8c is a plan view from above of the embodiment of Figure 8a in a closed state..;

Figure 9a shows a further embodiment with tangentially acting on the mast umbrella arms in schematic side view.

. Fig. 9b, the embodiment of Figure 9a in a top plan view in the open condition; and

Fig. 9c the embodiment of Fig. 9a in a top view from above in the closed state.

In the embodiment shown in Fig. 1 is an inventive sun protection device 11 for installation outdoors or in uncovered rooms on the left half of the picture in the closed and on the right half in the open state in a schematic side view Darge. For size comparison, a schematic male was also drawn in on the left half of the picture in addition to the sun protection device 11 , which male is supposed to represent a body size of approximately 1.5 to 2 m.

On a vertically erected mast 12 is located at the upper end with a vertical distance from the installation surface a number of radially projecting, in the present Ausfüh approximately example in a vertical plane down ge curved shield arms 13 , each carrying flat elements 14 for shielding against sun rays. As can be seen in the plan view of FIG. 1b, 13 through-slots 15 are provided between the flat elements 14 , which consist, for example, of fabric or plastic webs, and a front edge of the shield arms.

When rotating the shield arms 13 with the flat elements 14 about the longitudinal axis of the mast 12 , this creates a ventilation effect in such a way that the area below the sun protection device 11 area is cooled by a draft with a vertical component from above.

When in Figs. 2a and 2b illustrated embodiment, shield lower arms 23 a and in the axial direction vertical to offset upper shield arms 23 b are provided, are clamped between de NEN membrane-like surface elements 24. Inter mediate the planar elements 24 are each provided obliquely from top to bottom through slots 25 are provided. When the shield arms 23 a, 23 b rotate with the flat elements 24 around the mast 22 , a ventilation effect occurs below the sun protection device 21 . The shield construction shows similarities to Greek wind turbines.

Again, the Fig. 3a and 3b illustrate another exporting approximate shape represents, in which the sun protection device me 31 radially protruding from the mast 32 and partially collapsible Schirmar 33 has, on which planar elements 34 are fixed. In this embodiment, the flat elements 34 serving to shield the sun rays are designed as drive-generating aerodynamic surfaces. By changing the setting angle of the aerodynamic surfaces with respect to the common connection plane 38 with the mast 32 , which can be done by simply rotating the flat elements 34 about the respective axis of the umbrella arm 33 , the setting angle of the aerodynamic surfaces and thus the lift effect is large Limits variable.

The buoyancy effect due to the aerodynamic surfaces can be exploited, for example, in that a screen that can be opened further according to the centrifugal governor principle with increasing rotation speed requires no or only significantly lower forces to raise the umbrella arms. To secure and mechanically stabilize the screen, the screen arms 33 can then snap into a rigid, fully extended position when a certain rotational speed is exceeded, from which they do not retract automatically towards the mast 32 even when the rotational speed is reduced. In order to fold the screen, unlocking must then be carried out manually or by remote control.

A particularly simple, rigid construction is shown in FIGS. 4a and 4b: here the shield arms 43 project radially from the mast 42 of the sun protection device 41 . For mechanical security against wind influences, the rigid umbrella arms 43 are additionally clamped via wires 47 to a rotatable rod 46 relative to the mast 42 , which extends in extension of the mast 42 . The flat elements 44 for shielding against sun rays are designed in this exemplary embodiment and are hanging on one side on the respective shield arm 43 , while the other edges hang loosely or flutter to the rear during rotation in the wind and thus provide shade below the sun protection device 41 .

The embodiment shown in FIGS . 5a to 5c of a sun protection device 51 according to the invention can be folded in opposition to the construction shown in FIGS . 4a and 4b. In the left half of Fig. 5a, the shield arms 53 with the attached flag-like flat elements 54 are folded radially away from the mast 52 , while the right half of the image shows the screen in a closed Seitenan view. Accordingly, Fig. 5b is a plan view from above of the open sun protection device in the left half of Fig. 5a, while Fig. 5c is a plan view from above of the open sun protection device 51 accordingly the right half of Fig. 5a represents.

The embodiment shown in FIGS. 6a to 6c of a sun protection device 61 differs from the previous two embodiments in that the umbrella arms 63 run from an approximately parallel to the mast 62 , the closed shape downwards and radially away from the mast 62 . In the fully open position, a latching of the shield arms 63 is provided, the shield arms 63 then being clamped to a rotatable rod 66 by means of wires 67 . As flat elements 64 are in turn flag-like fabric or plastic sheets seen before, which are attached to the edge of the respective umbrella arms 63 be.

The embodiment of a sun protection device 71 shown in FIGS. 7a and 7b differs from the above-described embodiments in particular also in that the shield arms 73 a, 73 b themselves are made flat, so that additional flat elements for shielding sun rays are not required . In order to keep the individu elle area of the individual umbrella arm 73 a, 73 b as small as possible, the umbrella arms are vertically offset in the axial direction and arranged "on gap". As a result, the upper umbrella arms 73 a cover part of the gaps between the lower umbrella arms 73 b, providing shade.

The sun protection device 71 is in turn designed to be foldable. In Fig. 7a, the shield arms 73 a 'and 73 b' can be seen in the folded-down position, while with the reference numerals 73 a, 73 b the shield arms in the open position are indicated radially from the mast 72 .

Figs. 8a to 8c show a sun inventive protection device 81, are arranged in the photovol taische in use upwardly directed surfaces of the flat elements 84 elements 88, from which the energy for rotation of the shield arms 83 all around the mast 82 around or can be partially obtained. While FIG. 8b shows a top view of the sun protection device 81 in the rotating operating state, the rest position is shown in FIG. 8c with the umbrella arms 83 ′ bent and hanging parallel to the mast 82 . In Fig. 8a are indicated at de positions, the umbrella arm is provided in the horizontal operating position with the reference number 83 and in the hanging rest position with the reference numeral 83 '.

A further embodiment is finally shown in FIGS. 9a to 9c, which represent a sun protection device 91 , in which, like the sun protection device 81, those parts of the shield arms 93 which carry the flat elements 94 are in the rotating operating state ( FIG. 9b ) engage tangentially on mast 92 . The idle state with hanging umbrella arms 93 'is shown in FIG. 9c in a top view from above.

Claims (13)

1. Sun protection device for installation outdoors or in non-roofed rooms with a generally vertically erected mast, on which with vertical stand from the installation area radially foldable umbrella arms that carry flat elements for shielding from sun rays, and a ventilation device are provided, the shield arms are part of the ventilation device and can rotate about the longitudinal axis of the mast, characterized in that the shield arms ( 13 ; 33 ; 53 ; 73 a, 73 b; 83 '; 93 ') with increasing rotational speed according to the centrifugal governor principle can fold up. 2. Sun protection device according to claim 1, characterized in that the ventilation device receives the energy required for rotation of the shield arms ( 83 ) from photovoltaic elements ( 88 ). 3. Sun protection device according to claim 2, characterized in that the photovoltaic elements ( 88 ) on the top of the flat elements ( 84 ) are arranged for shielding from sun rays. 4. Sun protection device according to one of the preceding claims, characterized in that the umbrella arms ( 13 ; 33 ; 53 ; 73 a, 73 b; 83 ; 93 ) snap into a rigid, fully extended position when they exceed a certain rotational speed, from which they also If the rotation speed decreases, do not fold back towards the mast ( 12 ; 32 ; 52 ; 72 ; 82 ; 92 ) by itself. 5. Sun protection device according to one of the preceding claims, characterized in that the flat elements ( 14 ; 34 ; 84 ; 94 ) for shielding sun rays are designed as lift-generating aerodynamic surfaces. 6. Sun protection device according to claim 5, characterized ge indicates that the angle of attack of the aerodynamic Areas is variable. 7. Sun protection device according to claim 6, characterized ge indicates that the angle of attack by change the setting angle of the aerodynamic surfaces varii is noticeable. 8. Sun protection device according to one of the preceding claims, characterized in that the shield arms ( 73 a, 73 b, 73 a ', 73 b') are themselves flat. 9. Sun protection device according to one of claims 1 to 7, characterized in that on the umbrella arms ( 43 ; 53 ; 63 ) flexible, flag-like flat elements ( 44 ; 54 ; 64 ) are attached at the edge. 10. Sun protection device according to one of claims 1 to 7, characterized in that between the shield arms ( 12 ; 23 a, 23 b) flat membranes with passage slots ( 15 ; 25 ) are stretched. 11. Sun protection device according to one of the preceding claims, characterized in that the shield arms ( 23 a, 23 b; 73 a, 73 b) vertically in the axial direction and are arranged "on gap". 12. Sun protection device according to one of the preceding claims, characterized in that the shield arms ( 13 ) are preferably curved in a vertical plane. 13. Sun protection device according to one of the preceding claims, characterized in that the shield arms ( 83 ; 93 ) engage tangentially on the mast ( 82 ; 92 ).