EP0426046A2 - Insectprotection-roller grill - Google Patents

Abstract

The insect-protection roller grill includes a grating type insect protection grill, which is wound onto a winding shaft which can be arranged in a conventional roller shutter box. Fixed at the lower end of the insect-protection grill is a guide strip which is taken up in a lead weight strip. The guide strip extends beyond the weight strip at both axial ends and engages in side guide rails in which it is guided when the insect-protection grill is wound up and down. The weight of the lead strip causes smooth winding down of the insect-protection grill from the winding shaft when the latter is released. The weight strip is permanently tensioned in the wound-down state, so that it cannot be torn out of the side guide rails even by gusts of wind. The roller grill is economical to obtain and assemble, so simple to handle that it can be operated both by children and adults, and prevents the penetration of insects virtually completely, so that the use of "insecticides" in living areas can be avoided. <IMAGE>

Description

The invention relates to an insect protection roller grille device for insect-tight, air-permeable covering of a window or door opening, with a flexible, preferably mesh-like insect protection grille which is guided in lateral guide rails attached to the outside of the opening and can be wound onto a winding shaft which is rotatably mounted above the opening, which for this purpose can be rotated about its axis by means of an actuating device and locked in the respective rotational position, and with a strip which is attached to the lower end of the insect screen.

Such insect protection roller grille devices are known in a variety of embodiments. In the so-called spring roller blinds, the winding shaft is connected to a torsion spring which is tensioned when the insect screen is unwound, so that the insects protective grid can be rewound by spring force. A disadvantage of the spring roller blinds is that they have to be locked in the unwound position, which can be done, for example, by a bar fastened at the lower end of the insect screen latching into a holder attached to the window ledge. Before the insect screen can be rewound in such a spring roller blind, it is necessary to release the locking of the screen, which is cumbersome and can also be dangerous if this is carried out by children and the elderly or the elderly, who are responsible for this Have to lean the window. Another disadvantage of spring roller blinds is that after a relatively short period of use, the spring force of the torsion spring diminishes, so that the unwound insect screen is no longer sufficiently tensioned to ensure perfect covering of a window or door opening, and the automatic return effect is impaired. In addition, it is difficult to attach the bar attached to the lower end of the insect screen on the window ledge or the door sill so that an insect-proof covering of the building opening is also ensured in this area.

There are also known insect protection roller grille devices in which the insect protection grille is pulled up and rolled up manually by means of a pull belt or a pull cord which is unwound from a pull roller connected to the winding shaft and optionally wound onto a counter roller. If the insect screen from a There is thin gauze, the weight of which is extremely low, and the insect screen for insect-tight covering of the building opening sits in side guides in which friction and holding forces act on the insect screen, it is necessary to unwind the insect screen from the winding shaft, for example, at one of the pull cord attached to the bottom bar of the insect screen to unwind the screen by hand, as is the case with spring blinds. Accordingly, the handling of these rolling grille devices is cumbersome, even if it is not absolutely necessary to lock the lower bar in the closed position. Another disadvantage of this type of roller shutter curtain that can be wound up is that the insect screen is hardly tensioned due to its low weight in the unwound state, so that special precautions must be taken to prevent the thin gauze from being exposed to wind ( Draft!) Or gusts of wind can be torn out of the side guide rails. Nevertheless, it will be unavoidable that the gauze, which is hardly stretched in the longitudinal direction of the insect screen, flutters during abrupt wind loads, which is extremely undesirable and affects its durability.

All previously known insect protection roller grille devices have in common that they are cumbersome to handle and only ensure a highly insect-proof cover of a window or door opening if this requires complex sealing measures for the the edges and the lower edge of the insect screen are met.

The present invention has for its object to further develop an insect screen rolling grille device of the type mentioned that it is easy to use and ensures a practically completely insect-proof cover of a window or door opening. This insect-tight cover should also be ensured when the insect screen is subjected to strong and abrupt wind loads. In addition, the rolling grille device should have such a structure that it can be accommodated in a conventional, possibly already installed, roller shutter box.

This object is achieved by the features specified in the characterizing part of patent claim 1. Advantageous embodiments of the invention are characterized in the subclaims.

In the insect screen rolling grate device according to the invention, the bar attached to the lower end of the insect screen is a weight bar which has such a weight that the insect screen automatically unwinds smoothly after the winding shaft is released. The weight is of such a size that both the forces counteracting the rotary movement of the winding shaft, which result in particular from the rotatable mounting of the winding shaft on both sides, and the frictional forces in the lateral guide rails are overcome, so that the insect screen is in principle unwound so smoothly, like this is the case with a roller shutter curtain. This is also the case if the insect screen consists of a thin gauze, the weight of which is negligibly small, so that the weight of the gauze can practically not support the unwinding process.

The weight bar stretches the insect screen evenly across its entire width, so that it is kept completely smooth during the unwinding process, which means that the frictional forces acting on the lateral edge areas of the insect screen from the guide rails, which counteract the unwinding process, are minimized.

The strong tension in the insect screen has the consequence that even strong and jerky wind loads cannot lead to the lateral edge areas of the insect screen emerging from the side guide rails. The tensioned insect screen also withstands the wind loads without fluttering, which not only avoids annoying noises, but also extends the useful life of the generally thin, mesh-like gauze. This also applies in the event that, for example, a perforated metal foil is used instead of a mesh-like fabric, which is also within the scope of the present invention.

The weight bar also achieves the effect that the insect screen is wound tightly onto the winding shaft, so that a tight winding with a very small diameter is created. So he can Insect protection roller grille device according to the invention can be easily accommodated in a conventional roller shutter box, which can also be retrofitted with the insect protection roller grille device, since the winding shaft to be accommodated in the roller shutter box takes up very little space even when the insect screen grille is fully wound up.

The device according to the invention is just as easy and convenient to use as a conventional roller shutter and thereby ensures practically completely insect-tight covering of a building opening.

It is proposed with particular advantage that the weight bar consists of lead. Lead has such a large specific weight that the weight bar, while ensuring smooth unwindability, can have dimensions such that the insect screen roller grille device according to the invention can be used in addition to an existing roller shutter curtain. It must be taken into account here that the guide rails of the insect screen are to be arranged on the inside, ie the side facing the window or door of any existing guide rails of the roller shutter curtain and that there is generally only a space between these guide rails of the roller shutter curtain and the window frame or door frame about 1 cm remains. As a result, the width of the weight bar is generally limited to a maximum of 10 mm, so that the weight bar is only given an acceptable height in practice if it is made of a material which is as heavy as lead. To ensure a sufficiently smooth ab winding process should - as the applicant's experiments have shown - the weight of the weight bar be at least 1 kg / m, which is achieved when using lead by a bar that has a height of approx. 25 mm with a width of 10 mm.

It is proposed with great advantage that the lower end of the insect screen is attached to a guide bar, which in turn is attached to the weight bar and is preferably received in a groove of the weight bar and protrudes over the weight bar at both axial ends. This measure contributes significantly to the fact that the insect screen is held securely in the guide bars even when strong wind forces are applied, since the guide bar, in contrast to the weight bar, extends over the entire width of the insect screen and thus the weight of the weight bar is completely uniform on the insect screen and thus also transfers to the lateral edge areas. The weight bar is namely somewhat shorter than the clear distance between the side guide rails, which ensures the free movement of the weight bar, while the protruding ends of the guide bar engage with the corresponding lateral edge areas of the insect screen in the guide rails.

The insect screen can be easily attached to the guide bar, which is preferably a flat bar, by winding the lower end region of the insect screen, for example, around the guide bar and gluing it to it.

The guide bar preferably has a thickness of about 1 mm and a height of about 12 mm, which ensures a uniform transmission of the weight of the weight bar to the insect screen over the entire width and ensures a completely tilt-free guidance of the protruding ends of the guide bar in the side guide rails . Since the lateral edge areas of the insect screen, which engage in the side guide rails, are taut, a smooth movement of the insect screen including the lateral end areas of the guide bar counteracts only very little friction.

The guide rails should be closed in cross-section except for a slot for receiving the guide bar in order to prevent insects from entering. In a preferred embodiment of the invention, the slot has a width of approximately 1.3 mm, as a result of which the bar, which is preferably 1 mm thick, is guided smoothly and yet there is hardly any possibility that insects will enter the guide list through the slot.

The smooth guidance in the slot is promoted in that, according to a further proposal of the invention, the slot is delimited by two parallel webs, the free ends of which are each bent away from the slot. Thus, the insect screen, the side edges of which preferably extend beyond the ends of the two parallel webs, cannot catch or get caught on the marginal edges of the webs, as a result of which the unwinding and winding process would be blocked and which would tear the thin gauze.

The free ends of the webs are preferably bent approximately in a U-shape, as a result of which insects which may have penetrated into the interior of the guide rail are additionally made more difficult to penetrate through the window or door opening.

According to a further proposal of the invention, the webs should extend approximately over half the width of the guide rail, while the guide rail and the insect screen attached to it should extend approximately to the opposite inner walls of the guide rails. As a result, the friction between the webs and the guide bar is limited when the guide bar is guided smoothly, while the width of the guide bar does not allow lateral displacement, which could otherwise lead to a one-sided exit from a guide rail.

To fasten the guide rail, which is closed on the slot slot side, to the window or door reveal, it is proposed either to form it in one piece with a guide rail for a roller shutter curtain or to provide it with an outwardly facing flange which, for fastening the guide rail, has an adjacent guide rail for one Roll-under armor can reach under.

According to a further aspect of the invention, an elastically deformable cover is arranged on the underside of the weight bar, which cover is closed Condition of the insect screen is applied to the underside of the opening in order to produce the desired insect-proof cover in this area. At the same time, this elastic, deformable cover achieves the effect that the tension in the insect screen is maintained, since the weight bar is only slightly elastically supported and can therefore maintain the tension in the insect screen.

In a preferred embodiment, the resilient cover is attached to the underside of a cover strip, which is preferably made of plastic, which can snap onto the weight strip and clamp the insect screen between its resilient webs. This not only covers the unsightly lead bar, but also largely prevents water from entering the area of the weight bar and guide bar.

It is particularly advantageously proposed that the deformable cover is a bristle strip which has a large number of deformable bristles which can adapt to all unevenness in the underside of the opening, so that a completely insect-tight closure is ensured here. Although the bristles are easily bendable, they always endeavor to stand upright, as a result of which even irregular depressions in a contact surface are sealed against the penetration of insects. This effect would not be achievable with a continuous, deformable bar, since there is a slight gap in the support area can remain if there are unevenness. Because of the large number of its individual bristles, the bristle strip is very resistant and practically indestructible, especially when it is made of plastic in a preferred manner.

According to the invention, the cover strip serves as a stop to prevent the insect screen from completely entering the roller shutter box. This can be a conventional, conventional roller shutter box.

According to the invention it is therefore provided in a preferred embodiment that the weight bar consists entirely or partially of lead and that its weight is at least 1 kg / m. With this weight, all occurring frictional forces in the side guide rails are overcome, so that the insect screen automatically unwinds completely smooth and is also kept so tight during the unwinding process that the frictional forces acting on the lateral edge areas from the guide rails are minimized. Due to the strong tension in the insect screen, even strong wind loads cannot lead to the lateral edge areas emerging from the guide rails. Any flutter of the net-like gauze is excluded.

In addition, the considerable weight causes the insect screen to be wound tightly onto the associated winding shaft, so that a tight winding with a very small diameter is produced. So that can the winding shaft can be retrofitted into an existing roller shutter box, since the small space required for this is available in the conventional roller shutter boxes.

Due to the special material, the required weight can be achieved with a bar that is only about 25 mm high with a width of 10 mm. This makes it possible to install the insect screen roller grille device according to the invention in addition to an existing roller shutter armor, since the weight bar can be accommodated in the generally very small space between the roller shutter armor and the window or between the guide rails of the roller shutter armor and the window block. This usable space is only about 1 cm, which is maintained by the weight bar provided according to the invention.

According to the invention it is further provided that the lower end of the insect screen is fastened to a guide bar which is received in the weight bar and projects on both sides thereof, the weight bar being somewhat shorter than the clear distance between the side guide rails. In a preferred embodiment, the guide bar has a flat profile with a thickness of about 1 mm and engages with its ends on both sides in the guide rail, the guide slot of which in this preferred embodiment is about 1.3 mm wide. This ensures the insect-tight lateral connection of the gauze to the guide rails, since this is for guiding the Arrangement provided in the guide grooves of the side rail flat profile has such a small thickness that there is no longer enough space between the gauze and the groove walls in which the insects can enter. The weight bar nevertheless transfers its weight across the entire width of the guide bar to the gauze, so that its edges are also stretched.

In order to perfect protection against insects, it is provided in a preferred embodiment that an elastically deformable bristle strip is arranged below the weight bar, which, when the insect screen is closed, lies tightly against the underside of the opening, for example on the window ledge and thereby compensates for all unevenness .

• Fig. 1 einen Schnitt durch einen herkömmlichen Rolladenkasten, in den eine Wickelwelle für ein Insektenschutzgitter eingebaut ist;
• Fig. 2 eine perspektivische Ansicht eines Fensters, das sowohl mit einem herkömmlichen Rolladen als auch mit der erfindungsgemäßen Insekten­schutz-Rollgittervorrichtung versehen ist, von der Innenseite des Raumes aus gesehen;
• Fig. 3 einen rein schematischen Vertikalschnitt durch eine Ausführungsform einer Gewichts­leiste der erfindungsgemäßen Insekten­schutz-Rollgittervorrichtung;
• Fig. 4 einen rein schematischen Horizontalschnitt durch eine Ausführungsform einer seitlichen Führungsschiene und die Gewichtsleiste gemäß Fig. 3 und
• Fig. 5 einen rein schematischen Vertikalschnitt durch eine Ausführungsform einer Abdeck­leiste.

According to the invention, a practically completely insect-proof covering of a window or door opening is guaranteed, which is the case even with strong and abrupt wind loads. The device can be retrofitted behind an existing roller shutter curtain, since it has only a minimal overall width. It has a robust structure so that it is fully functional over a long period of use. In addition, the device has a relatively simple structure, so that it is inexpensive to manufacture and install.

• 1 shows a section through a conventional roller shutter box, in which a winding shaft for an insect screen is installed.
• Figure 2 is a perspective view of a window, which is provided both with a conventional roller shutter and with the insect screen roller grille device according to the invention, seen from the inside of the room.
• 3 shows a purely schematic vertical section through an embodiment of a weight bar of the insect protection roller grille device according to the invention;
• Fig. 4 is a purely schematic horizontal section through an embodiment of a side guide rail and the weight bar according to Fig. 3 and
• Fig. 5 is a purely schematic vertical section through an embodiment of a cover strip.

FIG. 1 shows a conventional roller shutter box 1, in which a winding shaft of large diameter 2 for a roller shutter armor 3 is arranged. Below the winding shaft 2, there is sufficient space in the conventional roller shutter box 1 for arranging a further winding shaft 4 for an insect screen 5 which is made of gauze and is therefore very thin. The winding shaft 4 has a very small diameter because the gauze 5 is wound tightly. The two winding shafts are designed and supported in a conventional manner, and there is no need to go into further details here.

FIG. 2 shows a window which is equipped with the arrangement according to FIG. 1. To actuate the roller shutter curtain 3, a belt 6 is provided, which is wound up in a conventional manner on a pulling roller, not shown, which is connected to the winding shaft 2. Correspondingly, a belt 7 is arranged to actuate the insect screen 5, which is wound up in a corresponding manner on a pulling roller, also not shown, which is connected to the winding shaft 4.

From Figure 2 it can be seen that the insect screen 5 is arranged between the roller shutter 3 and the window, so that the side guide rails of the insect screen 5 are attached between the guide rails for the roller shutter 3 and the window frame.

Reference is now made to FIG. 3, which shows a vertical section through the lower end region of the insect screen 5. The lower edge area of the insect screen 5 is wound around a cross-sectionally rectangular guide strip 8 and firmly glued to it. The guide bar 8 sits in a groove 9 of a weight bar 10 made of lead, which in turn is surrounded by a plastic cover bar 11 which is snapped onto the weight bar. Here lay the two side Spring arms 12 of the cover strip 11 firmly on the gauze 5.

On the underside of the cover strip 11 there is a schematically indicated bristle piece 13 which, in the unwound state of the insect screen 5, lies against the window parapet, the bristles being deformable in such a way that the weight of the weight bar 10 continues to tension the insect screen 5.

FIG. 4 shows a horizontal section through a lateral guide rail 14 which has a slot 15 for the entry of an end section of the guide bar 8 projecting beyond the weight bar 10 and the associated edge area of the gauze 5. The slot 15 is delimited by two parallel webs 16, the head ends 17 of which are bent in a U-shape.

The weight bar 10 ends at a slight distance in front of the guide bar 14, while the guide bar 8 extends almost to the inner wall 18 of the guide bar 14.

A lateral flange 19 is formed on the guide bar 14 and engages under a conventional guide rail 20 for the roller shutter curtain 3. The U-shaped guide rail 20 and the flange 19 can be fastened in a conventional manner by means of screws 21.

Figure 5 shows a schematic vertical section through the cover strip 11, on which the lower bristle piece 13 is formed with very elastic bristles.

The spring arms 12 snap together in the installed position above the weight bar 10 and clamp the gauze 5 firmly between them, so that the entry of water is largely prevented.

Claims (10)

1. Insect screen rolling grille device for insect-tight, air-permeable covering of a window or door opening, with a flexible, preferably mesh-like insect screen, which is guided in the side guide rails attached to the outside of the opening and can be wound onto a winding shaft rotatably mounted above the opening, for this purpose is rotatable about its axis by means of an actuating device and can be locked in the respective rotational position, and with a strip which is attached to the lower end of the insect screen,
characterized by
that the bar is a weight bar (10) with such a weight that the insect screen (5) automatically unwinds after the winding shaft (4) is released, that the lower end of the insect screen (5) is attached to a guide bar (8) which the weight bar (10) is attached and which projects over the weight bar (10) at both axial ends, that the weight bar (10) is somewhat shorter than the clear distance between the side guide rails (14) and the projecting ends of the guide bar (8 ) engage in the guide rails (14), and that the guide rails (14) are closed in cross section except for a slot (15) for receiving the guide bar (8). 2. Device according to claim 1,
characterized in that the weight bar (10) consists entirely or partially of lead. 3. Device according to claim 1 or 2,
characterized in that the weight of the weight bar (10) is at least 1 kg / m. 4. Device according to one of claims 1 to 3,
characterized in that the guide bar (8) has a flat profile with a thickness of approximately 1 mm and a height of approximately 12 mm. 5. Device according to one of claims 1 to 4,
characterized in that the slot (15) of the guide rail (14) has a width of approximately 1.3 mm. 6. Device according to one of claims 1 to 5,
characterized in that the slot (15) of the guide rail (14) delimits two parallel webs (16), the free ends (17) of which are each bent away from the slot (15) and bent approximately in a U-shape. 7. Device according to one of claims 1 to 6,
characterized in that the guide rail (14) on the side opposite the slot (15) has an outwardly facing flange (19) which engages under an adjacent guide rail (20) for a roller shutter curtain (3) for fastening the guide rail (14). 8. Device according to one of claims 1 to 7,
characterized in that an elastically deformable cover (13) is arranged below the weight bar (10), which lies against the underside of the opening when the insect screen (5) is closed. 9. The device according to claim 8,
characterized in that the resilient cover (13) is attached to the underside of the cover strip (11), which snaps onto the weight strip (10) and clamps the insect screen (5) between its resilient webs (12). 10. The device according to claim 8 or 9,
characterized in that the deformable cover consists of a bristle strip (13).

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