EP1799951A1

EP1799951A1 - Louvered roller blind body and method for production thereof

Info

Publication number: EP1799951A1
Application number: EP05793145A
Authority: EP
Inventors: Peter Bichler
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-10-04
Filing date: 2005-10-04
Publication date: 2007-06-27
Also published as: WO2006037594A1; DE202005010548U1

Abstract

The invention relates to a louvered roller blind, comprising bodies (4), each with a bar (12), provided with at least one window (18) and a slat (9), with a first (10, 13) and a second hook (5, 6) in cross-section. The first hooks (10, 13) of the bar (12) and the slat (9) together form a hinge, permitting a relative pivoting movement of the bar (12) and slat (9), from a closed position in which the slat (9) covers the window (18) and an open position in which the slat (9) opens the window (18). The second hook (5) of the slat (9) forms a hinge with the second hook (6) of the bar (12) of an identical second body (4). The four hooks (5, 6, 10, 13) are each curved in the same direction.

Description

Venetian blinds, link and manufacturing process therefor

The present invention relates to a shutter which can be louvered or a member for such a roller shutter, several of which can be joined together to form a roller shutter shell and a production method for such a member or shutter.

In the currently widespread roller shutter constructions, the links are one-piece rods made of plastic or metal, which are provided at their longitudinal edges with intermeshing bar-shaped elongated hooks. The interlocking hooks each form a hinge, which causes a certain Schwenkbewegungs¬ freedom of the rods with respect to each other and so ermög¬ light to wind the rods coupled to save space on a winding core, which usually in a housing ober¬ half a window, the Roller shutter is assigned, is arranged.

The conventional roller shutters with one-piece bars are poorly suited to partially obscure a room. Although it is possible to partially shut off the window surface by the shutter is only partially lowered, but can still incident directly through the remaining area of the window sunlight. The lower edge of the roller shutter casts a sharp shadow in the interior of the room, which can be extremely annoying, especially if it falls on the worktop of a desk. In order to create usable lighting conditions for working on such a desk, it may be necessary to lower the roller shutter entirely and to use artificial lighting.

When the roller shutter is completely lowered, effective ventilation of the room through the window is no longer possible.

In order to remedy these problems, there have been proposed louvered roller shutters whose members have elements which are pivotable for the controlled more or less wide release of light or air passage openings of the roller shutter. Many such Venetian blinds use Seilzug- or link chain constructions, which are guided parallel to the lowered roller shutter and each attack on the movable Elemen¬ th, so that this regardless of how far the Roll¬ is lowered, by operating the cable or the Link chains can be swiveled. As an example among many, EP 0 189 091 B1 may be mentioned here.

This type of louvered roller shutters generally has a complicated structure that makes them both costly and prone to failure.

A much simpler construction of a roller blind which can be louvered is proposed in US Pat. No. 3,642,050. This roller shutter uses members according to the preamble of claim 1, with a provided with at least one window rod and a blade, each having a first and a second hook in cross-section, wherein the first hook of the rod and the blade ge together form a hinge pivotal movement of rod and sipe against each other between a closed position in which the sipe covers the window, and an open position in which the sipe releases the window, and the second hook of the sipe is arranged with the second hook of the rod of an identical second member to form a hinge, which corresponds in function to the hinges described above between the one-piece members or bars of non-louvable shutters.

A problem with this shutter, however, is that it offers significantly worse protection against burglary than a non-adjustable shutter. It is possible to load the lower edge of the lamella at the lowered roller shutter and to pivot the lamella up by force, so that the first hooks bend and the hinge formed by them breaks down. The rods which are no longer interconnected can then be bent with little effort and torn out of their guides. In extreme cases, just one storm can be enough to dissolve the roller shutter composite and scatter the individual parts.

From DE 1 237 289 a roller shutter is known in which between two roller shutter bars respectively intermediate members are provided, which are hingedly connected to two rods. The roller shutter bars and intermediate links each delimit slots which, when the roller shutter armor is not supported at its lower end, are closed by a blade of a bar adjacent to the slot. When the roller shutter is completely lowered and its lower end is supported at a lower edge of the window, the rods pivot so that the fins clear the slots. Also, this roller shutter provides only insufficient protection against burglary, since the width of the intermediate links and thus also of the joints between them and the bars is low and therefore no excessively large forces are required in order to protect the area. bend and separate the roller shutter bars and intermediate links von¬ each other.

The object of the present invention is to provide a link for a roller blind which can be shuttered or which forms a robust composite which is resistant to storms and offers effective protection against burglary.

The object is achieved in that, in a roller shutter member according to the preamble of claim 1, the two first and the two second hooks all have the same direction of curvature. While, in the case of counter-curved hooks according to US Pat. No. 3,642,050, the engagement between the first hook loosens when the louvres pivot and only the engagement of the second hooks with one another deepens, the engagement of the two hinges in the case of the louver of the present invention increases when the louvres pivot that it is very difficult to tear apart the pairs of hooks by exerting force on the lamella, be it by a burglar or a storm.

Preferably, the rod of the roller shutter member is a Hohlpro¬ fil, in particular of plastic, whereas the lamella can be formed as a simple, cavity-free profile.

The hollow profile of the rod preferably has at least one, more preferably at least two longitudinal walls which divide the inner cavity of the profile into two or more chambers and thus improve the bending stiffness of the hollow profile. At least one of these longitudinal walls should run without interruption past the window, so that the window does not form a weak point of the bending stiffness.

Such a cross-sectional configuration of the rod is in particular expedient if this is shaped by extrusion or extrusion.

A convenient alternative is to make the rod from a band of rigid material, e.g. an aluminum sheet, roll-ready.

When such a roll-formed bar has two walls, a weather-side and a building-side, the windows are preferably formed in depressions formed in at least one of the walls. It is particularly preferred that the recesses touch the respective other wall, so that the inner cavity of the rod is sealed. The contacting recesses may also, when secured together, stiffen the rod. An attachment can be easily achieved by a in The foamed synthetic resin filled in the cavity comes about.

Another alternative is that the rod is single-walled roll¬ shaped. This alternative, which is particularly suitable for small-sized roller shutters, makes the production of the windows particularly easy.

The slat of the roller shutter member may be extruded or roll formed from a tape. In the latter case, preferably one of the hooks of the lamella is double-walled. The window preferably has at least one edge region aligned with one of the longitudinal walls. The alignment reduces the likelihood that environmental dirt will stick to the window and give the roller shutter such an unsightly appearance. In order to avoid mechanical weak points at corners of the window and thus to improve the durability and load-bearing capacity of the bar, the corners of the window are preferably rounded off.

In the window, an insect screen can advantageously be attached.

In the case of a rod which has a plurality of windows, a continuous strand of the insect screen preferably covers the windows in order to simplify production.

The bar and lamella are preferably designed such that they assume the closed position under a tensile force acting on the second hooks and the open position under a compressive force acting on the second hooks.

The tank of a roller shutter according to the invention has at least one two-part member with rod and lamella, as described above on.

In such a roller shutter, the axes of the first hinge formed by the first hooks of the two-part link and the second hinges formed by the second hooks of the two-part link and respective adjacent links are preferably arranged such that they span a triangle, wherein the axis of the first hinge is further toward an outside of the roller shutter than the axes of the second hinges. This arrangement ensures that when the tank is lowered, the lamella opens automatically when the two-piece member is subjected to pressure by overlying limbs.

Preferably, the shell of the roller shutter has at least one one-piece member, the outline of which is the same in cross-section as that of the two-part link in the closed position.

The cross section of the one-piece member can be modeled on any known, space-saving roll-up cross-section. The members according to the invention can then be combined as desired with one-piece links of corresponding cross-section in a roller shutter panel, the space required for the wound roller blind being the same as in a non-ventilatable roller shutter consisting of only the single-part members.

For winding, the shell of a roller shutter is usually suspended from a rotatable hub. In the case of the roller shutter according to the invention, the limbs of the tank closest to the winding core are preferably one-piece links. This saves weight and costs compared with a tank consisting only of two-part links, without adversely affecting the utility value, because even when the roller shutter shell is completely lowered, its links adjacent to the winding core generally do not leave the roller shutter box.

The longitudinal ends of the members of a lowered roller shutter armor are conventionally guided in a groove. Preferably, in the open position, the lamella strikes against two mutually opposite flanks of the groove. This stop defines, on the one hand, a maximum pivoting of the lamella in the open position; on the other hand, it causes wedging of the lamella in the groove when an unauthorized attempt is made to push up the lowered roller shutter shell.

In order to enable a large swivel angle of the slat, the longitudinal end of each slat guided in the groove is preferably narrower than a middle section covering the window. According to a preferred further development, a groove shaped complementary to the second hook of the lamella is formed on the rod adjacent to its second hook, against which the second lug of the lamella bears flatly in the open position. A large contact thus achieved between the hook of the lamella and the bar of the overlying member riding on it gives the roller shutter a high stability and load capacity in the open position.

In order to further improve the stability of the shutter in the open position, it can be provided that the distance between an edge of the contact surface formed between the throat and hook and a point in the cross section of the blade, on which meet the two hooks and a swing wing, smaller than one third of the length of the hook. Generally, the torque is to which the said second hook of the lamella is exposed, the smaller the closer the edge of the contact surface lies at the point, and correspondingly less is the risk of unintentional bending of the lamella. In order to stabilize the lamella in the open position, it is further appropriate that the first hook of the lamella has an angled end portion whose radius of curvature is greater than its distance from the axis of the hinge formed by the first hook, and that in the open position abuts flat on a flank of this lamella associated rod.

In order to be able to stably support a weight force transmitted by the slat lying in the open position, the said flank of the rod preferably has a course rising toward the side of the rod hidden from the pivoting blade in the closed position.

According to another modification, the lamella is preferably made so wide that it completely covers the rod in the closed position. This is thus no longer visible from the outer side of the roller shutter, so that it is possible, in particular, to make the rod and the lamella different

To manufacture materials. In particular, the lamella can be made of metal, in particular of aluminum, while the rod, whose hollow cross-section of metal is generally to be formed aufwen¬ dig, can be made of plastic simply and inexpensively. Moreover, such a construction is very durable since the plastic, which is endangered by UV radiation, is protected from direct solar radiation by the metal of the lamella.

Further features and advantages of the invention will become apparent from the following description of exemplary embodiments with reference to the attached figures Be¬. Show it:

Figure 1 is a schematic view of a window of a building which is equipped with a roller shutter according to a first embodiment of the invention. 2 shows a section through members of the roller shutter of Figure 1 in a not completely lowered state ..;

3 shows a section through the same members in the fully he¬ lowered state.

4 shows a perspective partial view of the rod of a roller shutter member according to the invention;

5 shows a perspective view of the lamella of the roller shutter member; 6 is a perspective view of a modified Ausges¬ taltung the blade,

FIG. 7 roller shutter members with the lamella according to FIG. 6 in completely lowered state; FIG. FIG. 8 shows a section analogous to FIG. 2 through links of a roller shutter according to a further development of the invention; FIG.

9 shows a section analogous to FIG. 3 through the roller shutter according to further development;

FIG. 10 shows a section analogous to FIG. 2 according to a modified embodiment; FIG.

11 a rod with fly screen;

12 shows a schematic view of a window of a building which is equipped with a roller shutter according to a second embodiment of the invention; FIG. 13 shows a section through members of the roller shutter from FIG. 12 in a state which has not been completely lowered; FIG.

FIG. 14 shows a section through the links of FIG. 13 in the completely lowered state; FIG.

FIG. 15 shows a section through a roll-formed roller shutter member; FIG. 16 is a perspective view of the rod of the rollgeform¬ th roller shutter member.

Fig. 17 is a schematic view of a structure for roll forming the rod of Fig. 16;

FIG. 18 shows a schematic section through a left-rolling shutter; FIG.

FIG. 19 is an enlarged detail of the roller shutter of FIG. 18 in a not fully lowered condition; FIG.

FIG. 20 shows the same detail in the completely lowered state; FIG. Fig. 21 is a detail enlarged again;

FIG. 22 shows a variant of the detail from FIG. 21; FIG.

Fig. 23 is a schematic section through a left-rolling

Blinds, -

Fig. 24 is an enlarged detail of the shutter of Fig. 23 in a state of being not fully lowered; and

Fig. 25 the same detail in the fully lowered state Zu¬.

Fig. 1 is a schematic view of a roller shutter according to the invention mounted in a window of a building. A sunk in the building wall and not visible from the outside Rollladen¬ box 1 is shown in dashed lines. In the roller shutter box 1 there is a winding core 2 of cylindrical or polygonal cross-section, which is rotatable in order to complete the winding in the figure. winding down the roller shutters shown in the lowered position and pulling them into the roller shutter box.

The roller shutter shell consists of a multiplicity of links 3, 4. The links 3, which each form an upper or lower end of the shell, are known per se, made of plastic or aluminum extruded hollow profile rods. As an alternative (not shown in the figure) are also from Aluminium¬ sheet cut and bent into a hollow body and foamed for the purpose of stiffening rods into consideration. As in the cross-section of Figs. 2 and 3, the links 3 have at their upper and lower edges hooks 5, 6, which extend in the form of webs over the entire length of the links 3 and which in the illustration of FIG. 2 respectively extend from their base 7 to their towards the free end 8 have a clockwise curvature. The number of contiguous members 3, which form the upper end of the roller shutter, is chosen so that when completely lowered tank, as shown in Fig. 1, one of the members 3 protrudes from the shutter box 1.

Two-membered links 4 adjoin this last one-piece link 3, the structure of which can likewise be seen from FIG. 2. Each two-part member 4 comprises a lamella 9 with an upper hook 5, which extends bar-shaped over the entire length of the lamella 9 and its cross-section of the Ha¬ kens 5 of the one-piece member 3 is simulated, a lower hook 10, which also web-shaped and is curved in a clockwise direction, and a pivoting wing 11 which projects far beyond the lower hook 10 down. A rod 12 of the two-part member 4 has an upper hook 13, which engages the hook 10 of the La¬ melle 9, a lower hook 6, whose cross-section is replicated to that of the hook 6 of the one-piece member 3, and between the hooks 13, 6 a body in the form of a hollow profile, which is divided by longitudinal walls 14 into a plurality of chambers 15, here four pieces. Vertical lines 16 indicate the legs of a U-profile 17, which is attached to both sides of the window opening, to guide the links 3, 4 vertically.

Fig. 2 shows the configuration of the members 3, 4 with not completely lowered tank. The lowermost member is not supported, and the hooks 5, 6, 10, 13 are each subjected to tensile load. The axes of the hinges formed by the interlocking hooks 5, 6 and 10, 13 each span an elongated triangle, which is drawn on one of the links 4 as a dash-dotted outline. As a result of this arrangement of the axes, the force acting on the links 4 is achieved Train each of the pivoting wing 11 held pressed against the body of the rod 12, and formed in each rod 12 windows 18 (see Fig. 1) are covered by the pivoting wing 11 which fits tightly against the outside of the rod 12. When the roller shutter armor is seated with its lower edge on the window sill 19, the tensile load of the Glie¬ 4 reverses into a compressive load. As can be seen in Fig. 3, the members 4 give this pressure by pivoting rod 12 and blade 9 against each other, wherein the pivoting wing 11 spreads from the rod and the window 18 is free. In this position, the roller shutter allows effective ventilation of the room darkened by it, and also indirect light can penetrate through the windows 18. Direct sunlight, on the other hand, can pass through the roller shutters only when the sun's position is extremely low.

4 is a partial perspective view of a bar 12. A plurality of windows 18 are milled or stamped into the bar 12, with upper and lower longitudinal edges 20 of the windows 18 each flush with one of the longitudinal walls 14. The corners of the windows 18 are rounded to avoid that mechanical stresses to which the rod 12 is exposed lead to strong material stresses at the corners, which could damage the material of the rod 12.

FIG. 5 shows a first embodiment of the lamella 9 in a perspective analogous to the perspective of FIG. 4. From the swing wing 11, a recess 21 is cut out at one end of the blade 9, whose extension in the longitudinal direction of the blade 9 corresponds approximately to the depth of the groove of the U-profile 17, in which this longitudinal end dips. When the roller shutter in the configuration shown in Fig. 3 with maximum splayed

Swing wings 11 is located, the longitudinal edge 22 of the Ausspa¬ tion 21 on the inside of one of the legs 16 of the U-profile 17, and the adjacent hooks 6 press against each of the opposite leg 16. If unauthorized attempt is made to move the roller shutter, block the slats 9 wedging in the U-profile 17. If an attempt is made to pull up a pivoting wing 11 beyond the stop position of FIG. 4, this can only lead to breaking of the pivoting wing at the level of the longitudinal edge 22, but not to separate the interlocking hooks from each other. The closed composite of the roller shutter remains intact.

6 shows a second embodiment of the lamella 9, in which the pivoting wing 11 at the level of the in the U-profile 17 thaw. end of the long end is completely cut away. Here is no

Longitudinal edge 22 more present, which abut on the U-profile 17 and thus limit the pivoting movement freedom of the blade could te. As can be seen in FIG. 7, in this embodiment, a stop position is defined by the fact that the rod 12 with its outer side 23 or its hook 6 presses against the legs 16 of the U-profile 17 which lie opposite one another.

FIGS. 8 and 9 each show sections through a roller shutter according to a further developed embodiment of the invention. The mode of operation of this embodiment is essentially the same as in the previously described embodiments. Differences lie in details of the cross sections of the interlocking hooks 5, 6, 10, 13 of the bars 12 and lamellae 9. While in the embodiment of FIG. 3, the hook 5 of the lamella 9 and the hook 6 of the bar 12 sitting above it in the In the embodiment of FIGS. 8 and 9, in the open position, the outside of the hook 5 fits snugly against a groove-shaped cut substantially at two points, namely at the tip of the hook 5 and an outer lower edge of the Sta¬ bes 12 Contact surface 31 at the lower end of Sta¬ bes 12 at. As shown in FIG. 9, the hook 5 of the blade is thereby blocked in its rotation, even before its top abuts against the hook 6 of the rod 12 from above. The part of the hook 5 which bears on the contact surface 31 in a form-fitting manner can not be bent under the weight of the roller shutter members which bear on it in the open state. A bending would be possible at most in an extremely short, at the connection point 32 between the hooks 5, 10 and the pivoting wing 11 adjacent portion of the hook 5, which does not bear directly on the rod 12. However, since this section is very short and the contact surface 31 extends practically to above the connection point 32, the risk of bending even with a low material thickness of the lamella 9 can be made very low.

The hook 10 of the lamella 9 terminates in a not or at most weakly curved end section 34, which in the open position of FIG. 9 lies flat against a sloping flank 35 of the bar 12 lying underneath and thus stabilizes the tilting position of the lamella 9 ,

While in the embodiments considered above, a stop for the lamella in the open position is defined only at the longitudinal ends of the roller shutter members and there is the risk of uneven opening due to torsion of the lamellae, the cross section of FIGS. 8 and 9 ensures a above the entire length of the roller shutter members the same opening position, so that functional shutters can be made ge¬ wide width.

The modification shown in FIG. 10 differs from that of FIG. 8 in that the pivoting wing 11 of the plate 9 is extended down to the outer edge 36 of the contact surface 31. Below the lower edge of each pivoting wing 11, therefore, nothing more of the lying behind the pivoting blade 12 is to be seen, but it immediately follows the next slat 9 at. The lamellae 9 thus form on the weather side of the roller shutter a closed scale surface, which protects the behind hidden rods 12 from the weather and in particular from direct sunlight. While the lamellae 9 can be made of a light-resistant and weather-resistant metal, in particular of aluminum, the demands on the resistance of the material of the rods 12 are relatively low, so that the choice of usable materials can be increased and costs can be saved.

A further advantage of the use of a light-reflecting metal for the lamella 9 is that in the open position of the lamellae light is efficiently directed into the interior of a room by multiple reflection on the outer and inner sides of the pivoting vanes 11, so that Without artificial lighting, a bright, diffuse illumination of the room is achieved, but direct solar radiation is prevented.

FIG. 11 is a perspective view, analogous to FIG. 4, of a rod 12 in which a fly screen 24 is embedded in a wide groove on the outside 23.

The groove extends beyond the edges of the windows 18 in all directions, so that the fly screen substantially filling the width of the groove can be fastened to the window 18 over its entire circumference, e.g. by welding or adhesive.

When closed, the fly screen between rod 12 and blade 9 is enclosed and not visible from the outside.

An alternative embodiment not shown is the fly screen on the inside of the rod 12, the windows 18 arranged to cover. FIG. 12 shows a perspective view, similar to FIG. 1, of a building window 25 with a prefabricated shutters guided in U-profiles 17 according to a second embodiment of the invention. The roller shutter box 1 is not in the building Dewand admitted, but prefixed, so that the Krümmungs¬ direction, with the roller shutter is wound up in the box 1, is another than in the case of Fig. 1. The members of such, also referred to as a left roller blinds have a generally concave curvature on its weather side, in contrast to the reference to FIGS. 1 to 11 described Rechtsrol¬ learning that are convex on the weather side.

FIG. 13 shows a section similar to FIG. 2 through two links of the left-hand scooter, a one-piece link 27 and a two-part link 28, which is composed of a hollow profile rod 29 and a lamella 30 articulated thereto. The rod 29 is provided analogously to the windows 18 of the rod 12 with windows not shown in the FIGURE. A pivoting leaf of the blade 30 covers the windows on the concave outer side of the rod 29, as long as the roller shutter shell does not rest on the window sill of the building window 25.

14 shows the same roller shutter members 27, 28 in a configuration in which the roller shutter armor rests on the window board and the two-part member 28 carries the weight of the one-piece member 27. In this case, the blade 30 is pivoted counterclockwise into a stop position in which an edge corresponding to the edge 22 from FIG. 5 strikes the U-profile 32 leading the roller shutter rods from the inside.

As in the embodiments of Figs. 1 to 11, all the hooks 5, 6, 10, 13, which respectively form hinges between the single-member 27 and the lamella 30 or between the lamella 30 and the rod 29, have the same direction of curvature, namely from the base to the tip of the hook in each case counterclockwise in FIGS. 13 and 14, according to the pivoting direction of the blade 30 when opening.

A further embodiment of the roller shutter member according to the invention is explained with reference to FIGS. 15, 16. Fig. 15 shows a cross section through the roller shutter member with lamella 9 and rod 12, and Fig. 16 is a perspective view of the rod 12. The lamella 9 is of the same type as in any one of

Fig. 2 to 10 is shown and therefore will not be explained in detail. The rod 12 is roll formed from an endless aluminum strip to a hollow profile. A weather-side wall 37 and a building-side wall 38 are at the level of the lower hook 6 of the rod 12 integral with one another. At the height of the upper hook 13 is the weather side

Wall 37 form-fit around the building-side wall 38 gebör- delt to create a strong connection between the two. In the walls 37, 38 in each case opposite, mutually contacting depressions 39 are formed, and in the Ver¬ recesses 39, the windows 18 are punched out. 16 shows a structure for producing the rod 12 of FIG. 16. The starting material used is a flat aluminum strip 40. This passes through a pair of rollers 41, 42, of which the lower 42 has four pairs of elongated strips on its circumference th projections 43 carries. The upper roller 41 is provided with to the jumps 43 complementary, not visible in the figure troughs. The rollers 41, 42 thus emboss two parallel rows of the depressions 39 in the band 40. Subsequently, the belt passes through a structure of a rotating in the plane of the drawing plate 44 and two mirror images of each other with respect to the plane of the drawing arranged rollers 45, between the two

Rows of depressions 39 form a longitudinal fold 46. A donut tip 47 injects an expanding foam material, e.g. a polyurethane resin, in the groove formed by the longitudinally folded band 40. Thereafter, the belt 40 passes through a roll former assembly which provides the belt with the cross-sectional configuration shown in FIG. Such a structure is known in the field of manufacturing aluminum roller shutter members and is therefore not shown in the figure and will not be described in further detail. The depth of the recesses 39 is selected such that during roll forming the walls 37, 38 are under elastic tension and the depressions 39 of one wall exert pressure on those of the other. Thus foamed resin material in the case of roll forming is removed from the wall Displaced region between mutually opposite recesses 39, possibly up to a thin residual layer with ei¬ ner thickness of fractions of a millimeter, which keeps the bottoms of the recesses 39 glued together.

At the exit of the .Rollform structure a punch, not shown, is arranged, the holes 18 in the contacting bottoms of the recesses 39 punched. Placing the punch at the last position in the manufacturing arrangement ensures that that the window openings formed in the two walls 37, 38 are always exactly aligned with each other.

The composition, processing temperature, etc. of the resin dispensed from the dispensing syringe 47 are adjusted so that the expansion process comes to completion only after complete passage through the rollform assembly. This ensures that no foam emerges from the profile during roll forming itself. Since the edges of the recesses 39 of the walls 37, 38 press gegen¬ each other, no foam on them, even if at the time of punching the window 18 of the expansion process should not be completed.

18 shows a schematic section through members of a left-rolling shutter, guided in a U-profile 17. The uppermost member shown is a one-piece member 27, members 28 hanging therefrom are constructed in two parts. FIG. 19 shows an area highlighted in FIG. 18 by a circle in an enlarged section. The member 27 and the rod 29 of the second member 28 are each roll-formed from a sheet-metal strip and filled with an expanded resin material 48. The upper hook 13 of the rod 29 ends in a bead 49 of a circular sector-shaped cross-section. This bead 49 engages positively in a groove of the slat 30 realized as an extruded profile. In the configuration shown in Fig. 19, in which the blind is suspended freely, the sash of the sipe 30 bears against the concave weather side of the bar 29, and a substantially planar top 50 of the bar and a straight flank 51 of the sipe 30 span one Angle up.

In the configuration of Fig. 20, the roller shutter rests on a sill, and each member carries the weight of overlying members. In this configuration, the blade 30 is tilted up to a stop which is defined by contact between the upper side 50 and the flank 51.

FIG. 21 shows a greatly enlarged section through the hook 13 and surrounding areas of the lamella 30. As can be seen, the metal strip 40, from which the rod 29 is made, extends uninterruptedly from the weather side to the building side via the hook 13 time. In this embodiment, a Bond between the longitudinal edges of the belt 40 preferably in

Height of the lower hook 6 (see Fig. 18) is formed.

An upper hook 13 according to another embodiment is shown in section in FIG. 22; Here, edges of the building-side wall 38 and the weather-side wall 37 are cylindrically wound together and around each other to form the bead 49. Thus, a solid form-fitting cohesion of the edges is guaranteed.

FIG. 23 shows a section similar to FIG. 18 through a roller shutter according to a further embodiment of the invention. This roller shutter is left-winding. Unlike the embodiments considered above, its members are single-walled. Both the rod 29 and the blade 30 of two-part Glie¬ countries 28 of the shutter are roll-formed from an aluminum strip, wherein in the case of the rod of the two longitudinal edges of the belt one to an upper hook 13 and the other to a lower hook 6 curved is. As can be seen in particular in the detail enlargements of FIGS. 24 and 25, which show interlocking hooks 5, 6, 10, 13 in the freely suspended state or in the state of the shutters supported on a window sill, in the case of lamellae. Ie 30 a longitudinal edge curved to form the upper hook 5 of the lamella, while the lower hook 10 of the lamella 30 is formed in a central region of the lamella-forming metal strip.

In the suspended configuration of FIG. 24, the pivoting blade of the blade 30 rests against the concave weather side of the beam 29, and a substantially planar upper side 50 of the rod and a rectilinear flank 51 of the blade 30 clamp a winch. In the supported configuration of FIG. 25, the blade 30 is tilted to a stop which is defined by contact between the top 50 and the flank 51.

Claims

Patentansprüchβ

1. member (4, 28) for a roller blind with a blind with at least one window (18, 30) provided rod (12, 29) and a lamella (9, 30), each in cross section a first (10, 13) and a second hook (5, 6), wherein the first hooks (10, 13) of the rod (12, 29) and the lamina (9, 30) together form a hinge which permits pivotal movement of the rod (12, 12). 29) and lamellae (9, 30) against each other between a closed position, in which the lamella (9, 30) covers the window (18), and an open position, in which the lamella (9, 30) the window ( 18), the second hook (5) of the blade (9, 30) is adapted to form a hinge with the second hook (6) of the rod (12, 29) of an identical second member (4) , characterized in that the four hooks (5, 6, 10, 13) each have the same direction of curvature.

Second member according to claim 1, characterized in that the rod (12, 29) is a hollow profile.

3. member according to claim 2, characterized in that the

Hollow profile has at least one two inner chambers (15) vonein¬ other longitudinal wall (14), and that the longitudinal wall (14) extends continuously along the window (18).

4. Member according to one of claims 2 to 3, characterized marked, that the rod (12, 29) is extruded or extruded.

5. member according to claim 2, characterized in that the rod

(12) is roll formed from a tape.

6. Member according to claim 5, characterized in that the rod (12) has a weather-side and a building-side wall auf¬ and that the windows are formed in recesses formed in at least one of the walls.

7. member according to claim 6, characterized in that the Ver¬ depressions touch the other wall.

8. Member according to one of claims 3 to 7, characterized gekennzeich¬ net, that the window (18) has a with the longitudinal wall (14) aligned edge region (20).

9. Member according to claim 1, characterized in that the rod is single-walled roll-formed.

10. Member according to one of the preceding claims, characterized ge indicates that the lamella is roll-formed from a strip, and that one of the hooks of the lamella is double-walled.

11. Member according to one of the preceding claims, characterized ge indicates that the window (18) has rounded corners auf¬.

12. A member according to one of the preceding claims, character- ized in that on the window (18) an insect screen

(24) is attached.

13. Member according to claim 12, characterized in that the rod (12) has a plurality of windows (18) and that a continuous strand of the insect screen (24) covers the windows (18).

14. Member according to one of the preceding claims, characterized ge indicates that rod (12, 29) and blade (9, 30) under a force acting on the second hook (5, 6) pulling force the closed position and under one on the second Hook (5, 6) acting pressure force occupy the open position.

15. Member according to one of the preceding claims, characterized ge indicates that on the rod (12) adjacent to the second hook (6) complementary to the second hook (5) of the Lamel¬ le (9) formed throat (31) is formed to which the second hook (5) of the lamella (9) abuts flat in the open position.

16. A member according to claim 15, characterized in that in cross-section of the lamella (9) whose two hooks (10, 5) and a pivoting wing (11) at a point (32) meet, and that the distance of a said point (32) adjacent edge of the contact surface between the throat (31) and hook (5) is less than one third of the length of the hook (5).

17. Member according to one of the preceding claims, characterized ge indicates that the first hook (10) of the lamella (9) has an angled end portion (34) whose Krüm¬ mungsradius is greater than its distance from the axis of the first hook (10, 13) formed hinge, and that in the open position, the end portion (34) flat against a flank (35) of the rod (12).

18. A member according to claim 17, characterized in that the flank (35) rises to one of the lamella (9) in the closed position geschlosse¬ NEN side of the rod (12) out.

19. Member according to one of the preceding claims, characterized ge indicates that in the closed position, the blade (9) completely covers the rod (12).

20. roller shutter, characterized in that its armature wenigs¬ least comprises a two-part member (4, 28) according to one of vorherge¬ existing claims.

21. Roller shutter according to claim 20, characterized in that the

Axes of the first hinge formed by the first hooks (10, 13) of the two-part member (4, 28) and the second hooks (5, 6) of the two-part member (4, 28) and respectively adjacent members (3, 4, 27) formed zwei¬ hinges span a triangle, and that the axis of the first hinge further to an outer side of the Rollla¬ denpanzers out than the axes of the second hinges.

Roller blind according to claim 20 or 21, characterized in that its shell comprises at least one integral member (3, 27), and that the outline of the one-piece member (3) is the same in cross-section as that of the two-part member (4, 28). in the closed position.

23. Roller shutter according to claim 22, characterized in that the tank is suspended from a winding core (2), and that the winding core (2) next adjacent members of the tank are integral members (3, 27).

24. Roller shutter according to one of claims 20 to 23 characterized gekenn¬ characterized in that in the developed state of the tank least one longitudinal end of the links (3, 4, 27, 28) is guided in a groove, and that in the open position Slat (9, 30) abuts against two opposite flanks (16) of the groove.

25. Roller shutter according to claim 24, characterized in that the guided in the groove longitudinal end of each blade (9, 30) is narrower than a window (18) covering the middle portion thereof.

26. A method for producing a roller shutter member, in particular according to claim 1 with the steps: - forming depressions in a band;

Forming a longitudinal fold in the band and folding the band along the longitudinal fold,

Assembly of the longitudinal edges of the band.

27. The method according to claim 26, characterized in that in the recesses windows (18) are cut out.

28. The method according to claim 26 or 27, characterized in that before the joining of the longitudinal edges an expandieren¬ the foam material is applied to the tape.