EP2206875B1 - Insect protection fabric - Google Patents

Abstract

The insect safety device has a mounting plate mountable before an opening and insect protection fabric (12), which has chaining yarn (16) and filling yarn (18) connected with one another in lattice-like manner. The chaining yarn and filling yarn runs in a separate thread level one above the other. An independent claim is also included for a method for production of an insect protection fabric for an insect safety device.

Description

The invention relates to an insect protection device for shielding openings such as windows or doors against the ingress of insects with a mountable in front of the opening holder and a held insect repellent fabric, which has lattice-like associated warp threads and weft threads. The invention further relates to a method for producing an insect protection fabric for such an insect protection device.

In such insect protection devices as inconspicuous optics (good visibility) and a high air flow rate should be maintained, at the same time the tissue openings must be so small that even small insects such as mosquitoes can not slip through. For this purpose, a plastic-coated fiberglass fabric in plain weave has prevailed on the market so far. A fiberglass thread ensures the stability and tear resistance of the fabric, while a plastic coating should enable the UV and weather protection, the coloring and the cross-point welding of the fabric. By this structure, a thread diameter of about 0.3 mm, however, can hardly be undershot. With a smaller diameter, the Function of the plastic coating impaired or the fiberglass thread too weak. Due to the plain weave, the weft threads pass alternately above and below the individual warp threads. The position of the threads thus changes from one stitch to the other from the right to the left side or top to the bottom of the fabric. The disadvantage here is the low resistance to displacement with larger grid openings. In the plain weave, the mutual normal force of the crossed threads is achieved only by the bending radii of the threads, so that with more open weaves or thinner threads, this force is always lower. This also complicates the handling of the fabric in the manufacturing process.

Another insect screen is off DE 10153248 A1 known.

Proceeding from this, the present invention seeks to further improve the known in the art insect protection devices and provide an improved insect protection fabric, which is inexpensive to produce, has a high dimensional stability and strength for the purpose and optically inconspicuous and permeable to air in the installed state.

To solve this problem, the combination of features specified in claim 1 and 14 is proposed. Advantageous embodiments and modifications of the invention will become apparent from the dependent claims.

The invention is based on the idea of achieving the different and sometimes conflicting requirements by means of a special leno-weave fabric. Accordingly, the invention proposes that the weft threads and the warp threads rest on one side and are connected to each other by binding threads, wherein the warp threads and weft threads are superimposed in each case a separate thread plane and extend in a straight line. By this layer structure with points of contact only on a consistent thread (half) page, a very accurate tissue with accurate thread layer of warp and weft can be displayed even at low thread thickness. By means of the binding thread, a high stability and in particular displacement resistance is achieved in comparison to the plain weave, whereby the further processing in subsequent production steps is facilitated or even made possible in the first place. Due to the stretched warp and weft layers, the fabric deforms only at higher tensile stresses compared to plain weave. The tear resistance increases significantly and it is achieved a significantly improved force-strain behavior. Possibly. For example, special effect areas may also comprise individual plain weave warp threads without, however, significantly altering the overall structure of the fabric.

In an advantageous embodiment, the holder is preferably formed by a profile spanning the insect protection fabric frame from profile sections. Alternatively, it is also possible that the holder by a the formed as a fabric web insect protection fabric laterally receiving guide is formed.

The unilateral Hauptfadenverkreuzung is thereby made possible that the weft threads and the warp threads each rest as a layer on each other, so that a fabric side is formed by the position of the weft threads and the other fabric side by the position of the warp threads. In this binding, it is possible for the warp threads and the weft threads to extend essentially in a straight line in separate thread planes and lie against one another only at their mutually facing inner sides or inner half sides in the intersection points, while the outer sides facing away from one another are looped around by the binding threads. By the binding thread, the mutual normal force of the other two largely bend-free thread systems is effected, so that a good dimensional stability is given regardless of the mesh size. The arrangement of the warp and weft threads in separate planes or layers also makes it possible to achieve high strength at low thread thickness.

Advantageously, the binding threads have a preferably smaller by about half the diameter than the warp and weft threads whose diameter can be reduced to a range of less than 0.2 mm, preferably about 0.1 mm.

A further advantageous embodiment provides that the fabric is solidified by cohesive connection means, in particular adhesives or welds in the region of the intersections, so that a sufficient strength is achieved even with open-mesh construction. The binding threads offer advantages in two respects, namely on the one hand a pre-consolidation of the fabric for the subsequent bonding process and on the other hand a collecting structure for the adhesive, which then preferably accumulates in the crossing region.

It is also favorable if the warp threads and weft threads are designed as monofilaments with preferably round cross-section. As a result, a higher precision in the thread layer and dimension is achieved compared to multifilaments. Round threads are easy to make and process because twisting in the longitudinal axis does not play any roles.

Advantageously, the warp threads and weft threads are made of plastic, in particular of a polyester material such as PET. Such threads are inexpensive to manufacture and also advantageous in that they are very tear-resistant and dimensionally stable in terms of temperature and humidity.

The warp threads and weft threads limit tissue openings, so that a good visibility and air permeability is ensured. For insect shielding, it is advantageous if the tissue openings have a clear width of 0.3 to 3 mm, preferably 0.8 to 1.2 mm in both directions. It should be noted that with thinner threads and the inside width can be reduced accordingly without the tissue is visually striking.

Particular advantages in use may also result from the fact that the fabric is designed in particular for producing strip effects or local reinforcements with varying thread strengths and / or thread densities and / or colors. In principle, it is also possible to produce strip effects by binding plain weave warp threads in specific areas. In this context, an improvement can also be achieved by fabric or thread coatings, for example, an antibacterial effect by silver coating.

In procedural terms, the object mentioned above is achieved in that the weft threads are placed on one side of the warp threads and connected by binding threads with the warp threads, so that the warp threads and weft threads are superimposed in each case a separate thread plane and the binding threads in Halbdreherbindung above the weft threads and below the warp threads are woven interlacing. As a result, the already mentioned for the device advantages for the process product can be achieved.

Fig. 1

eine als Spannrahmen mit einem Insektenschutz- gewebe versehene Insektenschutzvorrichtung zum Einsetzen in eine Fensteröffnung in perspekti- vischer Darstellung;

Fig. 2

einen Ausschnitt des aus drei Fadensystemen gebildeten Insektenschutzgewebes;

Fig. 3 bis 5

die Fadenbewegung der Bindefäden bei der Herstellung des Insektenschutzgewebes nach Fig. 2.

In the following the invention will be explained in more detail with reference to an embodiment shown schematically in the drawing. Show it

Fig. 1

an insect protection device provided as a tensioning frame with an insect protection fabric for insertion into a window opening in a perspective view;

Fig. 2

a section of the formed from three thread systems insect protection fabric;

Fig. 3 to 5

the thread movement of the binding threads in the production of the insect protection fabric after Fig. 2 ,

In the Fig. 1 illustrated insect protection device can be outside hook in front of a building window to prevent the ingress of insects, but without significantly affecting the view to the outside and the passage of air. The device comprises a clamping frame 10 composed at right angles of profile legs, a specially woven insect protection fabric 12 spanned therein and in the corner areas Details of such a mounting principle are for example from the DE 197 49 517 known.

The clamping frame 10 has a Kedernut for clamping the fabric 12 and can be connected by a peripheral seal (not shown) in the suspended state outside on a window frame of the window insect-tight, with a simple disassembly, for example, when not in use over the winter time is possible. Correspondingly adapted frame variants can also be used for other building openings, for example in front of doors or light shafts. Other uses arise from roller blind structures in which the insect protection fabric 12 is held in the form of a roll-up fabric web in lateral guide rails. Such an embodiment is for example from the DE 19639478 known. It is also conceivable to hang the insect protection fabric in lamellar tracks on a holder, for example in front of exterior doors. As a particularly simple holder and a tape or Velcro is conceivable.

As in Fig. 2 illustrated, the insect protection fabric 12 is formed of three thread systems. In the schematic diagram shown, the warp threads 16 form the underside of the fabric, while the weft threads 18 on one side or uniformly rest on one half side on the warp threads 16 and thus form the upper side of the fabric. As auxiliary threads for the fabric construction binding threads 20 are provided, which connect the warp and weft threads against each other.

The fabric 12 is based on a type of leno weave, wherein the warp threads 16 as a carrier chain in a lower thread plane and the weft threads 18 in an upper thread plane are substantially rectilinear and are wrapped on their outer sides facing away from the binding threads 20. Depending on the thread tension of the binding threads 20 and bending stiffness of the main threads results in a slight waviness in the warp and weft 16, 18, which is less than the thread thickness.

The warp threads 16 and weft threads 18 thus lie with their mutually facing inner sides or inner half sides at intersections 22 on each other, wherein the friction under the tensile force of the binding threads 20 a high sliding strength is already achieved without additional connecting means. In order to further improve the fabric strength, an adhesive can be applied and cured, for example, by spraying, dipping or foam impregnation. It is also conceivable to merge or weld the intersections 22. For example, thread systems with different melting temperatures could be used so that the main threads 16, 18 merge while the binding threads 20 do not merge. In principle, multicomponent yarns could also be used in which meltable threads or thermoplastics with different melting temperatures are already present in the yarn.

Suitably, the binding threads 20 are significantly thinner than the main threads 16, 18, so that a deformation largely acts only on the binding threads and the main threads remain in their rectangular lattice structure. For example, the binder thread diameter is less than 0.7 times, preferably about 0.5 times, the major thread diameter. Typical diameter values are 0.1 mm for the warp and weft threads 16, 18 and 0.05 mm for the binding threads 20. On the one hand to ensure the required insect impermeability and on the other hand, the light transmission is not unnecessarily limited, the tissue openings 24 should have a clear width of about 0 , 8 to 1.2 mm.

Preferably, the fabric 12 consists of monofilament threads 16, 18, 20, with a round cross-section. It is also conceivable to use square cross sections, for example to influence the reflection properties. As a low-cost thread material, plastics from the family of polyesters, in particular PET (polyethylene terephthalate) offers.

In general, the thread material should have a sufficient UV stability, for example by special stabilizers in the ground substance. In addition, it is advantageous if the material is dark or black colored, for example by addition of carbon black or pigment, so that the UV light is already absorbed in the outer thread layers and does not lead to a destruction of the molecule in the volume. A black color as well as a matte surface also leads to a reduction of disturbing reflections for the viewer.

The Fig. 3 to 5 illustrate the principal thread movement in the manufacture of the fabric 12 Fig. 3 the position of the warp yarns 16 during weaving forms the lower shed. A weft thread 18 is placed with its lower half side across the warp threads 16 and then fixed in the region of the crossing points by the binding threads 20. After the thread crossing of the binding threads 20 on the underside of the tissue, the next weft insertion ( Fig. 4 ), in which case the looping with the binding thread 20 takes place opposite to the previous weft thread 18. This process can be done according to Fig. 5 continue over the length of the warp threads 16, wherein the weft threads 18 are held at a mutual distance to keep free the mesh openings.

In principle, it is also possible that the different thread systems consist of different materials, and that certain areas of tissue are emphasized by varying the thread thicknesses or distances or by choosing varying colors. Not only does this have to serve for optical highlighting, but it can also provide reinforcement in high stress areas. This can be easily accomplished by the layer structure of the fabric in the described half-turn connection, especially when entering the weft threads.

Claims (15)

1. An insect protection device for shielding openings such as windows or doors against entry of insects, having a holder (10) which can be fitted in front of the opening and an insect protection mesh (12) which can be held thereon and has warp and weft threads (16, 18) linked together in the manner of a grid, the warp threads (16) and the weft threads (18) lying one on the other on one side and being linked together by binding threads (20), characterized in that the warp threads (16) and weft threads (18) lie one above the other in respectively separate thread planes and extend linearly.
2. The insect protection device according to claim 1, characterized in that the holder (10) is formed by a frame in which the insect protection mesh (12) is mounted and which is preferably made of profile sections.
3. The insect protection device according to claim 1, characterized in that the holder (10) is formed by a guide which laterally accommodates the insect protection mesh (12), which is in the form of a woven web.
4. The insect protection device according to any of claims 1 to 3, characterized in that the weft threads (18) and the warp threads (16) lie one on the other as a single layer in each case, and so one side of the mesh is formed by the layer of weft threads (18) and the other side of the mesh is formed by the layer of warp threads (16).
5. The insect protection device according to any of claims 1 to 4, characterized in that the warp threads (16) and the weft threads (18) form a rectangular grid structure in the insect protection mesh (12).
6. The insect protection device according to any of claims 1 to 5, characterized in that the warp threads (16) and weft threads (18) lie one on the other on their mutually facing insides at crossing points (22).
7. The insect protection device according to any of claims 1 to 6, characterized in that the warp threads (16) and weft threads (18) are looped around on their outsides, which face away from one another, by the binding threads (20).
8. The insect protection device according to any of claims 1 to 7, characterized in that the binding threads (20) have a diameter which is smaller, preferably by about half, than the warp and weft threads (16, 18).
9. The insect protection device according to any of claims 1 to 8, characterized in that the insect protection mesh (12) is consolidated by material bonding means, in particular adhesives or welds in the region of the crossing points (22).
10. The insect protection device according to any of claims 1 to 9, characterized in that the warp threads (16) and weft threads (18) are in the form of monofilaments having a preferably round cross section.
11. The insect protection device according to any of claims 1 to 10, characterized in that the warp threads (16) and weft threads (18) consist of plastic, in particular of a polyester material such as PET.
12. The insect protection device according to any of claims 1 to 11, characterized in that the warp threads (16) and the weft threads (18) define mesh openings (24), and in that the mesh openings (24) have a clear width of 0.3 to 3 mm, preferably 0.8 to 1.2 mm.
13. The insect protection device according to any of claims 1 to 12, characterized in that the insect protection mesh (12) is designed with varying thread thicknesses and/or thread densities and/or colors and/or with a mesh coating.
14. A method for producing an insect protection mesh (12) for an insect protection device according to any of the preceding claims, in which warp threads (16) and weft threads (18) are linked together in the manner of a grid, characterized in that linearly stretched weft threads (18) are laid on one side on top of the warp threads (16) and are linked to the warp threads (16) by binding threads (20), and so the warp threads (16) and weft threads (18) lie one above the other in respectively separate thread planes.
15. The method according to claim 14, characterized in that the binding threads (20) are woven intersecting above the weft threads (18) and below the warp threads (16).

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