EP3048237B1 - Lamellar blind - Google Patents

Description

The invention relates to an external blind according to the preamble of claim 1.

An external venetian blind of the generic type has a curtain which can be pulled up and drained off the building opening and which usually has perforated curtain strips which are penetrated by a number of elevator tapes, which in turn engage with a lower curtain strip in order to be able to raise or lower the curtain. Further, for the blinds of the draped Behanglamellen between an exposure position and a shading position on the longitudinal sides of the slats attacking turning tapes are provided. This poses the problem that the lamella stack forming when the curtain is raised or lowered can easily tip over, for example because of a gust of wind or because the curtain lamellae do not come to rest exactly on one another.

In order to achieve a better shading of the building opening in a Venetian blind of this type, according to the German utility model DE 296 13 220 U1 It has already been proposed to attach to the lamellar profile of Behanglamelle as a passage for the elevator belts number perforations, and serving to guide the Behanglamelle in lateral guide rails, projecting from the slat transverse guide pins with a smaller distance in slat transverse direction to one of the longitudinal sides of the slat profile on the slat profile as to the other long side.

As a result, the adjoining Behanglamellen come to lie in shading directly to each other, because the elevator belts are completely guided behind the closed lamellar front by the lamellar profiles, so that light gaps between adjacent Behanglamellen can be avoided or at least reduced. When mounting the But here the problem of instability of the lamella stack is a particular concern for Behangs, because the elevator belts do not attack the center of mass of the lamella stack on the end bar.

The US patent application US 2010/0212846 A1 shows a vertical awning with an attached at the bottom of the awning end rod. The end bar has a guide head which is guided in a guide groove of a side guide rail and for this purpose carries two guide rollers spaced from each other in Führungsnutrichtung.

The German Utility Model DE 20 2009 001 795 U1 is a Venetian blind with Behanglamellen and a lower end fin or end bar to take, where there is shown in the Behangendleiste a side plug-in end cap. The end cap has a guide body which has a guide head arranged in the interior of the guide groove and a neck section projecting into the guide groove and carrying the guide head. The neck portion is longitudinally extending in Führungsnutrichtung.

The German patent application DE 40 02 571 A1 discloses a Venetian blind with a guide pin on the Behangendleiste, which has a pointed at the bottom, upstanding rectangular profile through which the bottom rail or end bar is always held in a horizontal position. This makes it possible to stabilize the lamella stack against tipping, since the lower end bar on which the stack builds up, can not tip over.

On this basis, the invention is therefore based on the object to provide a Venetian blind with improvement in mounting and draining the curtain.

This object is achieved with the features of claim 1.

According to the guide rails each have a guide groove for the End bar on the one hand and in the direction transverse to the curtain next to another guide for the guided Behanglamellen on the other hand, so that the end bar on the one hand and the guided Behanglamellen on the other hand are each guided in their own guide. The guide groove for the Behanglamellen can be formed for example by a realized as a clip insert plastic profile, the clip insert can be clipped into an associated opening on the guide rail profile. However, it would also be conceivable to provide both guide grooves on one of a carrier profile removable Führungsnutprofil or only one edge of the opening for the clip profile, whereas the other edge may be formed to the carrier profile.

Because the end bar are guided in at least one of the two guide rails unverschwenkbar or tip over. For this purpose, guided in this guide rail guide body of the end strip according to the invention have a longitudinally of the guide or in Führungsnutrichtung longitudinally extended guide head, which is accommodated in the guide and prevents its longitudinal extension pivoting of the end bar. Alternatively, the guided in this guide rail guide body of the end bar also have two recorded in the associated guide groove, in Führungsnutrichtung widely spaced guide heads, which has the same effect. Of course, advantageously on both sides of the hanging same guide body attached to the end bar, which, as described above, formed and guided in their associated guide grooves.

The guide body of Behanglamellen, however, can be performed with much more play in the other two, their associated guide grooves, which can be made for the task of the Behanglamellen from a correspondingly favorable material such as plastic, and / or with high manufacturing tolerances if separate guide grooves are provided for the guide heads of the Behanglamellen on the one hand and the end bar on the other.

This also makes it possible that the curtain is not made unnecessarily difficult because the Behanglamellen need not have as elaborately designed guide body as the end bar. Simple, attached to the transverse sides of the lamella profiles guide pin with or without an overhanging guide head sufficient.

"Unschwenkbar led" means in this context only to a degree pivotal, which is due to manufacturing tolerances, the fundamental functions of securing the end bar against pivoting but guaranteed, so not necessarily absolutely absolutely swiveling. By "elongated guide head of the end bar" is meant in this context that the guide head in Führungsnutrichtung is longer than normal in the normal direction to the curtain, preferably more than twice as long.

The lower end bar can be made lighter than conventional, because the stability giving the stack weight is replaced by the tip-resistant guide the end bar. However, the lower end bar is still advantageous heavier than one of the Behanglamellen.

Since the end strip should be secured by its guide heads in the two associated guide against pivoting, but also against a wind offset in the transverse direction to the curtain, it is advantageous if the recorded in the associated guide grooves guide heads of the two attached to the end bar guide body with relatively small Distance from the side edges of the two guide grooves are arranged. Preferably, the guide heads are even on the side edges of the associated guide grooves, of course, a small game can be provided.

The resulting friction and noise caused thereby can be effectively reduced when the guide body of the end bar each have the two recorded in the associated guide groove, spaced in Führungsnutrichtung guide heads and this Guide heads are each formed as rotatably received on the guide body rollers, which roll in the associated guide groove.

It is also advantageous in terms of a further improved stabilization of the position of the end bar, when the guide bodies of the end bar associated guide grooves each have one of the end bar facing, undercut opening, which is penetrated by the respective guide body, wherein the guide body thereby have overhanging guide heads which prevent withdrawal from the associated, undercut guide groove.

In order to thread the problem occurring during assembly or disassembly of the curtain, the guide heads of the end bar in the associated guide grooves, and to be able to remove it again, to give a mounting-friendly solution, it is also advantageous if the guide rails each have a building-fixed carrier profile and a detachable fastened thereto Führungsnutprofil having the serving for guiding the end bar guide groove. During assembly or disassembly of the blind, the guide groove profile can then simply be removed from the carrier profile in order to thread the end strip with its guide bodies into the guide grooves of the two guide groove profiles or to remove them therefrom.

The offset of the bolt of Behanglamellen (the approach of the guide pin) to the bolt or attachment of the guide body on the end bar advantageously corresponds to the distance between the guide grooves on the two guide rails. In this way, it is ensured that the Behanglamellen put on the end bar congruent when mounting the end bar and at the same time allows the guide body of the Behanglamellen in one, the guide body of the end bar in the other guide groove of the two guide rails engage and an up or To blinds the Behanglamellen on the only to the Behanglamellen and not attacking on the end bar turning tapes remains possible.

In terms of a further improved shadowing or light-tightness of the Venetian blind, the two arranged on both sides of the blind guide rails according to the invention each have an advantageous L-shaped cross-sectional shape and stand with a on the inside of the building facing side of the Behanglamellen L-legs in lamella longitudinal direction inside over the transverse sides of the Behanglamellen or the lamellar profiles over. This results in a light trap for the light passing through the side of the curtain, which prevents the collapse of direct sunlight, and only allows a little diffused light to penetrate there. It would be within the scope of the invention, of course, other cross-sectional shapes for the guide rails conceivable, for example, the curtain facing, open U, as long as the leg on the building inside over the Behanglamellen. Likewise, it would be conceivable to stay with the L-shape of the guide rail cross-sections, but to provide the outside of the curtain over the legs of the guide rail profiles projecting beyond the ends of the curtain slat. However, if the projecting leg of the guide rail is located on the side of the curtain facing the building interior, this results in an architectically desirable, improved visual appearance of the facade of the building.

The light-tightness on the two sides of the curtain can thereby by an off-center bolting the Behanglamellen analogous to the utility model DE 296 3 220 U1 can be improved when the guide body or guide pins on the projecting L-limbs of the guide rail facing side of Behanglamelle. Because the closed curtain is then close to the protruding L-leg, so that the width of the gap, can penetrate through the light is minimized. By off-center bolting and the light-tightness between the closed Behanglamellen is improved, the parent measures the function of such a blinds make it possible in the first place.

Off-center bolting the Behanglamellen means that the Behanglamellen each have a spaced between two parallel longitudinal sides with a predetermined contour extending slat profile, on the narrow sides of the two guide body are fastened with bolt portions whose axis of rotation to the one longitudinal side of the respective Behanglamelle has a smaller distance as the other longitudinal side, preferably less than half the distance to the other longitudinal side, for example, less than one-fifth as large or even less than a seventh, and particularly preferably adjacent to the adjacent longitudinal side is arranged, and wherein the guide body on the the L-leg of the guide rails facing side of the Behanglamellen be.

It would be conceivable to suspend the end bar in the region of their guide body on the elevator belts, so that they extend next to the Behanglamelle and must not penetrate the Behanglamellen. It would also be conceivable to pass the elevator belts on the side facing the building interior to the Behanglamellen.

However, a better stabilization of the curtain against wind loads is achieved if the Behanglamellen have perforations through which the elevator belts are passed, especially if the elevator belts are designed as wind-stable steel cables or the like. In this case, it is of course advantageous if the perforations are located on the axis of rotation of the guide body of the Behanglamellen. This means that the lamellar profiles are advantageously penetrated in each case by a number of perforations serving as a passage for the number of elevator belts, wherein the number of elevator belts passes through the Behanglamellen at their perforations and wherein the perforations each Behanglamelle on an imaginary, extending in the longitudinal direction lamella through the bolt portions of the two guide body Line are arranged.

The fact that the two guide body each Behanglamelle are attached to the lamellar profile of Behanglamelle with different distance to the two longitudinal edges of the lamella, is also achieved that the Behanglamellen penetrating elevator belts are not visible from the outside when the curtain is closed when the perforations and the Guide body of the Behanglamellen are arranged closer to the inside of the building facing longitudinal edge than the outwardly directed longitudinal edge of the lamellar profile. This results in an additional burglar alarm. In addition, the elevator belts then no longer have to be passed between the Behanglamellen with closed curtain, which means that the Behanglamellen no longer pinch the elevator belts and thereby wear over time and what is particularly advantageous means that the Behanglamellen lie directly behind each other when the curtain is closed can, so that there is an additional improved shading.

Advantageous for the rigidity of the Behanglamellen is when the lamellar profiles each have at least one edge beading on one of its longitudinal sides. In addition, at such a edge curling and the turning tapes are attached, such as over the edge beading shot turning tape holder or attached to the edge flanging or injected Klippselemente where the associated turning tape can be clipped with attached to the turning tape Gegenklippselementen.

In order to achieve a secure closing of the gap between the Behanglamellen in the closed drapery are advantageously provided at the lower in the Behangzustand lower longitudinal edges of the lamellar profiles each edge beading there for the next lower Behanglamelle out (so in horizontal position of the Behanglamellen down) and in the Shading position at the next lower curtain lamella connects.

A particularly pleasing appearance of the curtain in the shading position results when the lamellar profiles of the Behanglamellen two under a preferably obtuse angle over a trough adjoining profile legs and the provided on the lower longitudinal edge edge beading comes to rest in the shading position or closed position of the curtain in the trough or recess of the next lower Behanglamelle, the perforations, if present, then on shorter, preferably arranged on the inside of the building facing side of the fin profile profile legs are formed.

The trough can then compensate for the supernatant of the lower edge flange relative to the longer profile leg located in the shade position Behang, so that forms the visual appearance of a closed front from the outside, without the lamellae would survive at their edge flanges on this front. For this purpose, the long or longer profile limb of the lamellar profiles extending between the trough and the lower edge flanging in the shade position is advantageously straight, the trough or the troughs of the individual curtain lamellae having a depth starting from the plane defined by the straight long profile limb corresponds to the supernatant in the shading position lower edge flange over this level, so that in the shading position, the long profile legs of the Behanglamellen form a vertical plane. The longer profile leg can also be slightly curved for manufacturing reasons, but still be almost straight. Slightly curved means that the radius of curvature with respect to the slat width is large, for example 500 mm.

However, it would also be conceivable to make the long profile legs wave-shaped, so that the appearance of a closed wavefront results from the outside on account of the depression compensating the projection of the lower edge beading.

In the following an advantageous embodiment of the invention is explained in more detail, which is illustrated in the accompanying drawings.

Figur 1

in perspektivischer Teilansicht eine Führungsschiene mit einem abgelassenen Behang mit aufjalousierten Lamellen eines Raffstores gemäß einer vorteilhaften Ausführungsform der Erfindung;

Figur 2

Einzelheit II in Figur 1;

Figur 3

eine horizontale Teilschnittansicht durch eine Führungsschiene des in Figur 1 gezeigten Raffstores mit Blickrichtung nach unten;

Figur 3a

eine der Figur 3 entsprechende Ansicht einer weiteren Ausführungsform eines erfindungsgemäßen Raffstores;

Figur 4

eine perspektivische Teilansicht einer Endleiste des in Figur 1 gezeigten Raffstores;

Figur 5

eine Seitenansicht eines Ausschnitts des Behangs des in Figur 1 gezeigten Raffstores in Verschattungsstellung;

Figur 6

eine der Figur 5 entsprechende Ansicht bei in Belichtungsstellung befindlichem Behang;

Figur 7

eine perspektivische Teilansicht einer Führungsschiene mit teilweise abgelassenem Behang des in Figur 1 gezeigten Raffstores;

Figuren 8 und 9 den Figuren 5 und 6

entsprechende Ansichten eines Behangs gemäß einer alternativen Ausführungsform der Erfindung, bei dem als Windsicherung zusätzliche Stahlseile gespannt sind;

Figur 10

eine schematische Vertikalschnittansicht durch den Behang und die Aufhängung desselben an der Wickelwelle Entlang Linie X in Fig. 1, welche durch ein Aufzugsband des Raffstores verläuft;

Figur 11

eine vertikale Schnittansicht entlang Linie XI in Figur 1, welche durch ein Wendeband verläuft; und

Figur 12

eine der Fig. 11 entsprechende Schnittansicht bei geschlossenem Behang.

Show it:

FIG. 1

in a perspective partial view of a guide rail with a draped curtain with floated slats of a Venetian blind according to an advantageous embodiment of the invention;

FIG. 2

Detail II in FIG. 1 ;

FIG. 3

a horizontal partial sectional view through a guide rail of in FIG. 1 Venetian blinds facing downward;

FIG. 3a

one of the FIG. 3 corresponding view of another embodiment of a Venetian blind according to the invention;

FIG. 4

a partial perspective view of an end bar of the FIG. 1 external blinds shown;

FIG. 5

a side view of a section of the blind of the in FIG. 1 external blinds in shading position;

FIG. 6

one of the FIG. 5 corresponding view in Behichtstellung in exposure position;

FIG. 7

a partial perspective view of a guide rail with partially draped curtain of in FIG. 1 external blinds shown;

FIGS. 8 and 9 show FIGS. 5 and 6

corresponding views of a curtain according to an alternative embodiment of the invention, in which are stretched as wind protection additional steel cables;

FIG. 10

a schematic vertical sectional view through the curtain and the suspension of the same on the winding shaft along line X in Fig. 1 . which passes through an elevator band of the Venetian blind;

FIG. 11

a vertical sectional view taken along line XI in FIG. 1 which passes through a turning band; and

FIG. 12

one of the Fig. 11 corresponding sectional view with closed curtain.

First, reference is made to the FIG. 1 which shows a Venetian blind consisting of Behanglamellen 1 and a lower end bar 4 and is guided to its two sides in each case in a guide rail 6, wherein the FIG. 1 only one of these two guide rails 6 can be seen. How the particular FIG. 2 It should be noted that detail II FIG. 1 shows in an enlarged scale, while lift belts 3 are connected to the lower end bar 4, via which the end bar 4 can be raised and lowered, which thereby entrains the Behanglamellen 1, as well as from the FIG. 7 emerges showing the curtain in partially worn position, with 5 Behanglamellen 1 rest on the end bar, and the upper two Behanglamellen 1 are in shading position.

How to continue from the synopsis of Figures 1 and 2 detects, turning tapes 2 are attached to the side edges of the Behanglamellen 1 to the Behanglamellen 1 between the in FIG. 1 shown exposure position of the blind and the in FIG. 7 to pivot shown shading position. It goes out in particular from FIG. 2 shows that the turning tapes 2 are not attached to the lower end bar 4, but only on the Behanglamellen. 1

For in the embodiment shown, the lower end bar 4 does not jalous, but should also remain in its horizontal position when closing the curtain. For this purpose, the lower end strip on each of its two narrow sides in each case a particularly clear the FIG. 4 to be taken leadership body 7. Of the Guide body 7 in this case has an L-shaped base body, whose one leg is inserted with a rectangular cross-section in a corresponding rectangular chamber of the end bar 4 and the other leg extends in Führungsnutrichtung, ie in the example shown in the vertical direction and two guide rollers 17 formed as rollers , The two guide heads 17 are spaced apart in Führungsnutrichtung in this way.

As FIG. 3 shows, the two guide heads 17 are guided with relatively little play in one of the lower end bar 4 associated guide groove 15 of the side guide rail 6 and can roll due to their rotatable mounting on the main body of the guide body 7 at the two edges of the guide groove 15. As a result, at the same time an undesirable displacement of the end bar 4 in the transverse direction to the curtain, such as wind loads or the like, and also an undesirable pivoting of the end bar 4 effectively prevented. This is particularly advantageous because the elevator belts 3 do not attack on the weighted center line of the lower end bar 4 and the entire contracted laminated core on the lower end bar 4, but added to the inside of the building. Nevertheless, due to the pivot-proof guidance of the end strip 4 in the guide rail 6, a tilting of the lamella stack during winding (lifting) / discharging is effectively prevented.

Again FIG. 3 can also be seen, while attached to the end bar 4 guide body 7 and attached to the Behanglamellen 1 guide body 8 are guided in separate guide grooves 15, 16, wherein the guide bodies 8 of the Behanglamellen 1 associated guide 16 laterally on the inside of the building side facing the arranged on the end bar 4 guide body 7 associated guide groove 15 is arranged.

The guide rail 6 is thereby screwed by a cross-sectionally approximately L-shaped support body 18 and a thereto, the Endleistenführungskörpern associated guide groove 15 forming Führungsnutprofil 20 formed. The guide groove profile 20 can be removed for threading the roller-shaped guide heads 17 in the guide groove 15. The guide rail 6 further has a curtain facing the opening, in which a guide groove 16 for the Behanglamellenführungskörper 8 forming Kunststoffinlet 9 is clipped.

On the inside of the building facing side of the guide rail 6 protrudes a leg 14 of the L-shaped carrier profile 18 in the direction of the other guide rail 6, ie in lamellae longitudinal direction inwards to allow a better Abdunklung on the side edges of the curtain in that a direct Light incident through gap between the guide rail 6 and the guide rail 6 facing side of the curtain is prevented. Due to the fact that the pivot axis of the Behanglamellen 1 when shuttering as below with reference to the FIGS. 5 and 6 explained, was moved to the protruding leg 14, also the remaining passage gap for diffused light between the inside of the building facing side of the curtain and the leg 14 of the guide rail 6 is narrowed, so that the incident on the sides of the closed curtain light amount is further reduced.

In the FIG. 3 are the turning and elevator belts omitted. However, it can be seen a perforation or passage opening 11 for one of the elevator belts 3, which is located near the inner longitudinal edge of Behanglamelle 1 on the pivot axis of the attached to the Behanglamelle 1 guide body 8. At the longitudinal edges of the Behanglamellen 1, like the FIGS. 5 and 6 show, are carried out as edge flanges 9, while Klippselemente 13 are injected into the Randbördelungen 9, in which Gegenklippselemente 12 are clipped, which in turn are attached to the turning belts 2.

The FIGS. 5 and 6 show the Behanglamellen 1 of the curtain in the shading position on the one hand and in exposure position on the other. The Behanglamellen each have a lamellar profile 5 with a short leg 5b and a long or opposite the short leg longer leg 5a, which are at an obtuse angle to each other and enclose a depression or trough 10 from both sides. In this case, the recess 10 opens in the exposure position ( Fig. 6 ) upward, whereas the lamellar profile 5 is concave downwards in the exposure position. The short leg 5b is located on the inside of the building facing side of the curtain and on the one hand the perforations 11 and on the other hand, the guide body 8, in a directly adjacent to the local edge flange 9 area.

Be the Behanglamellen 1 from the in FIG. 6 shown exposure points in the in FIG. 5 shown shading position pivoted by actuation of the turning tapes 2, so so the entire length of the long leg 5a plus that of the trough 10 can be used to shadow the building opening, whereas the short profile leg 5b carries the passages 11 for the elevator belts 3 and the guide body 8 and together the elevator belts 3 is covered in the closed state from the outside by the closed curtain. In this case, by the recess 10 and the therein in the shading position ( Fig. 5 ) recorded, lower edge flange 9 of the next upper Behanglamelle 1 also prevents the passage of direct light and creates a privacy especially against obliquely coming below views when the Behanglamellen 1 not completely close, so even in the shading position, a small gap between each Behanglamellen remains. Because the lower edge flange 9 of the next upper curtain blade 1, seen from obliquely below the visible edge at the transition from the long profile limb to the depression, stands in the way of a glimpse of light or view from diagonally below in the path.

Thus, when looking from the outside on the closed external blind not only the image of a visually appealing, smooth front, but it is also achieved that the holes 11, could fall through the light inside the building, are covered, so that already results in an improved shading. This effect is further enhanced by the fact that the slats 1 can directly abut each other, without the elevator belts would have to be passed between the slats, which automatically leads to a - albeit small - gap.

Again FIG. 10 can be seen, the curtain can be suspended by means of conventional reversing gear 30 to the winding shaft 29. The reversing gear 30 are inserted into a cross-sectionally approximately U-shaped head strip 31 and each have a reel 35 to which the respective elevator belt 3 is wound up and unwound, and with which the respective reversing gear 29 to the executed here with square cross-section Winding shaft 29 is pushed. On the head strip, an adapter 32 is clipped, which carries a deflection in the form of two guide rollers 33 in order to direct the elevator belt 3 in the plane of the holes 11.

How to do that FIGS. 11 and 12 removes the adapter 32 also carries two pulleys 34 in order to direct the turning belt 2 located on the side facing the building interior in the desired vertical plane. The two turning tapes 2 of the reversing gear 30 shown are each connected via a reversible cord 2a, 2b on a turning body 36, the co-rotating via a slip clutch with the reel 35 detachable or decoupled from it to the Behanglamellen 1 after reaching the deflated position of the curtain to pivot.

Advantageous modifications and modifications of the embodiments shown are possible without departing from the scope of the invention.

So could now, like the FIGS. 8 and 9 show, additional relatively thick but wind-stable steel cables are stretched as a windbreak, since the necessary passages are in geschlosssenem curtain behind the closed lamellar front and therefore no light pass.

However, it would also be conceivable to guide the elevator belts next to the curtain, that is not through the Behanglamelle through, which then would not have to be correspondingly perforated, unless for the Stahlseilwindsicherung.

Claims (15)

1. Venetian blind comprising a blind consisting of blind slats (1) which is raisable and lowerable by means of a certain number of pull up cords (3), and a lower bottom rail (4), with the number of pull up cords (3) acting on said bottom rail (4), further comprising another certain number of reversal cords (2) acting on at least one of the two longitudinal sides of the curtain slats (1), by which the curtain slats (1), at least when the curtain is lowered, are tiltable between an opened position, where the curtain slats (1) are spaced from each other, and a closed position where the curtain slats (1) are in contact with each other, and further comprising a guide rail (6) on one side of the curtain or on either side of the curtain, with a guide element (7, 8) being attached to one narrow side of the bottom rail (4) or each of both narrow sides of the bottom rail (4) and at least part of the curtain slats (1), such guide element (7, 8) protruding to the outside and extending into a guide groove of the associated guide rail (6) in order to guide the bottom rail (4) and the curtain slats (1), with the bottom rail (4) being guided in one or both guide rails (6) for which end each guide element (7) of the bottom bar (4) comprises a guide head received in the associated guide groove and extending longitudinally in the direction of the guide groove and/or at least two guide heads (17) received in the associated guide groove (15) and spaced in the direction of the guide groove, characterized in that each of the guide rails (6) comprises a guide groove (15) for the bottom rail (4) on the one side and beside in the direction transverse to the curtain another guide groove (16) for the guided curtain slats (1) on the other side, so that the bottom rail (4) on the one side and the guided curtain slats (1) on the other side are guided in individual guide grooves each (15, 16).
2. Venetian blind in accordance with claim 1, characterized in that each of the two guide elements (7) of the bottom rail (4) comprises the two guide heads (17) received in the associated guide groove (15) and spaced in the direction of the guide groove, said guide heads (17) being designed as rollers rotatably received on the guide element (7) which roll in the associated guide groove (15).
3. Venetian blind in accordance with claim 1 or 2, characterized in that each of the guide rails (6) comprises a carrier profile (18) attachable to the building and a guide groove profile (20) detachably fastened thereon with a guide groove (15) for the purpose of guiding the bottom rail (4), with each of the guide grooves (15) serving to guide the bottom rail (4) comprising an undercut opening facing the curtain, which is reached through by the associated guide element of the bottom rail (4), with the section of the guide element received in the guide groove (15) projecting behind the undercut opening.
4. Venetian blind in accordance with any of the preceding claims, characterized in that the curtain slats (1) exhibiting a slats profile (5) extending between two parallel longitudinal sides with a defined outline spaced in the transverse direction (Q) of the slats, on which narrow sides of the slats profile (5) the two guiding elements (8) are attached by means of pin sections whose distance in the transverse direction of the slats (Q) to the one longitudinal side of the respective curtain slat (1) is smaller than the distance to the other longitudinal side.
5. Venetian blind in accordance with claim 4, characterized in that the distance between the pin sections in the direction transverse to the slats (Q) and the one longitudinal side of the respective curtain slat (1) is less than half the distance than the distance between said pin sections and the other longitudinal side.
6. Venetian blind in accordance with claim 5, characterized in that the distance between the pin sections in the direction transverse to the slats (Q) and the one longitudinal side of the respective curtain slat (1) is less than one fifth as large or even less than one seventh as large than the distance to the other longitudinal side.
7. Venetian blind in accordance with claim 4, 5 or 6, characterized in that the pin sections are arranged adjacent to the bordering longitudinal side of the respective curtain slat (1).
8. Venetian blind in accordance with any of the preceding claims, characterized in that the guide rails (6) arranged on either side of the curtain protrude with a leg (14) in the direction longitudinal to the slats towards the inside over the transverse sides of the curtain slats (1).
9. Venetian blind in accordance with claim 8, characterized in that the leg (14) with which the guide rails (6) arranged on either side of the curtain protrude in the direction longitudinal to the slats towards the inside over the transverse sides of the curtain slats (1) is arranged on the side of the curtain slats (1) facing the inside of the building.
10. Venetian blind in accordance with claim 8 or 9, characterized in that the guide elements (8) are located on the side of the curtain slat (1) facing the L-leg(14).
11. Venetian blind in accordance with any of the preceding claims, characterized in that each of the slat profiles (5) is perforated by a certain number of holes (11) serving as reach through holes for the number of pull up cords (3), with the number of pull up cords (3) reaching through the curtain slats (1) at their holes (11), and with the holes (11) of the curtain slats (1) being arranged along an imaginary line running through the pin sections of both guide elements (8) in the direction of the slats.
12. Venetian blind in accordance with any of the claims 1 to 10, characterized in that the number of pull up cords (3) extends beside the curtain slats without reaching through the curtain slats.
13. Venetian blind in accordance with any of the preceding claims, characterized in that the bottom rail (4) is not or at least not tiltably connected with the reversal cords (2).
14. Venetian blind in accordance with any of the preceding claims, characterized in that each slat profile (5) of the curtain slats (1) comprises two profile legs (5a, 5b) disposed adjacent to each other below a preferably obtuse angle over a hollow (10), and further a rim flange (9) at least on the bottom longitudinal sides in the closed position, with the holes (11) being designed on the short profile leg (5b) which is arranged each on the side facing the inside of the building, and with the rim flange (9) provided on the bottom longitudinal side of the slat profiles (5) lying in the hollow of the next lower curtain slat (1) in closed position, and with the curtain slats (1) preferably also on the upper longitudinal sides of the slat profiles (5) in closed position possessing a rim flange (9) directly adjacent to the holes (6), and preferably with clip elements (13) being attached to the rim flange (9) by means of an incorporated clip, such clip elements (13) serving to fasten counter clip elements (12) which in turn are attached to the reversal cords (2).
15. Venetian blind in accordance with claim 14, characterized in that the long profile leg (5a) of the curtain slats (1) extending between the hollow (10) and the bottom rim flange (9) in closed position is straight or near straight, and the straight or near straight long profile legs (5a) of the curtain slats (1) starting from the hollow (10) form a vertical or near vertical plane.

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