Net, In Particular for a Basket for Pisciculture and a Method and Device for Production Thereof

Abstract

A net ( 11 ) is particularly suitable for a basket for pisciculture, which may be placed in sea or fresh water ( 16 ). The net ( 11 ) is made of a wire material ( 1 ), producible from individual spiral or similarly bent longitudinal elements, wherein adjacent threads ( 2, 3, 4, 5 ) are woven together. Said net is simple and economical to produce.

1 . A net, in particular for a basket for pisciculture, which may be placed in sea or fresh water, characterised in that the net is made of a mesh ( 1 ) which can be produced from individual spirally or similarly bent longitudinal elements, the adjacent longitudinal elements, such as wires ( 2 ,  3 ;  3 ,  4 ;  4 ,  5 ) respectively being interwoven. 
     
     
         2 . The net according to  claim 1 , characterised in that the longitudinal elements are made of the metal wires ( 2 ,  3 ,  4 ,  5 ) and/or of ropes and/or cords which are made of corrosion-resistant, stainless or corrosion protection-coated steel. 
     
     
         3 . The net according to  claim 2 , characterised in that the wires ( 2 ,  3 ,  4 ,  5 ) are made of steel which is coated with copper or copper alloys. 
     
     
         4 . The net according to  claim 1 , characterised in that the wire material ( 1 ) which is initially produced in a spiral or similar form can be compressed to form a flatter, yet still three-dimensional wire material. 
     
     
         5 . The net according to  claim 1   4 , characterised in that the wires ( 2 ,  3 ,  4 ,  5 ) are connected to one another flexibly in pairs at their ends, for which purpose the ends of the interwoven wires are knotted to form loops ( 2 ′,  3 ′,  4 ′,  5 ′). 
     
     
         6 . The net according to  claim 1 , characterised in that the wires ( 2 ,  3 ,  4 ,  5 ) and/or the ropes and/or the cords are made of high-strength steel, in particular with a nominal strength of 1000 N/mm 2  to 2800 N/mm 2    
     
     
         7 . The net according to  claim 1 , characterised in that with at least some of the interwoven longitudinal elements a substantially straight longitudinal reinforcement element is guided through the linkage region of the two spiral interwoven longitudinal elements by means of which the meshes formed in diamond shapes are divided into triangular or triangle-like meshes. 
     
     
         8 . The net according to  claim 1 , characterised in that the net can be used in the field of protection and safety, for example for retarding processes in the field of natural dangers, as a cover in safety technology, for shatter protection and/or similar, or in architecture. 
     
     
         9 . A method for producing a net according to  claim 1 , characterised in that individual longitudinal elements are continuously bent to form a cylinder shape or similar, the adjacent longitudinal elements such as wires ( 2 ,  3 ;  3 ,  4 ;  4 ,  5 ) being interwoven. 
     
     
         10 . The method according to  claim 9 , characterised in that a number of screw-shaped spirals are produced from the longitudinal elements and are interwoven at the same time. 
     
     
         11 . The method according to  claim 9  or  10 , characterised in that the spiral wires cut to a specific length are bent or knotted to form loops ( 2 ′,  3 ′,  4 ′,  5 ′) with their ends of the interwoven wires ( 2 ,  3 ;  3 ,  4 ;  4 ,  5 ) in order to connect the wires to one another flexibly in pairs. 
     
     
         12 . The method according to  claim 9 , characterised in that the wire material ( 1 ) woven from the wires ( 2 ,  3 ,  4 ,  5 ) bent into the cylindrical spatial spirals is pressed flat. 
     
     
         13 . A device for implementing the method according to  claim 9 , characterised in that a partial device for producing spirally bent wires ( 2 ,  3 ) and a separate bending device ( 50 ) for pressing the spirally bent wires ( 2 ,  3 ) flat are provided. 
     
     
         14 . The device according to  claim 13 , characterised in that the bending device ( 50 ) compresses the spirally bent wires ( 2 ,  3 ) such that with the individual spirals almost straight wire sections ( 3 ′) are respectively produced, and that the net composed from the latter has a mattress-like structure. 
     
     
         15 . The device according to  claim 13 , characterised in that the bending device ( 50 ) has stamps ( 52 ,  54 ) arranged in rows which can be moved in relation to one another laterally to the longitudinal extension of the spiral wires ( 2 ,  3 ) and are provided respectively on the front face side with a guiding groove ( 52 ′,  54 ′) centering the wire, the stamps ( 52 ,  54 ) being arranged a distance apart from one another according to the gradient height (h) of the individual spirals, and lifted a predetermined amount from a gripping position, in which a spiral wire can be turned or inserted into these guiding grooves of the stamps, into a bending position in which the spiral wire ( 2 ,  3 ) is compressed. 
     
     
         16 . The device according to  claim 13 , characterised in that additional bending tools ( 55 ,  56 ) are provided which can also be moved laterally to the longitudinal extension of the spiral wires ( 2 ,  3 ) which are arranged such that when moved they produce bending back of the spiral wires with the bends ( 3 ″) formed after the compression of the spiral wires.