U.S. patent application number 13/123730 was filed with the patent office on 2011-11-03 for net, in particular for a basket for pisciculture and a method and device for production thereof.
This patent application is currently assigned to GEOBRUGG AG. Invention is credited to Jurg Atz, Stephan Wartmann.
Application Number | 20110265729 13/123730 |
Document ID | / |
Family ID | 41510817 |
Filed Date | 2011-11-03 |
United States Patent
Application |
20110265729 |
Kind Code |
A1 |
Atz; Jurg ; et al. |
November 3, 2011 |
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.
Inventors: |
Atz; Jurg; (Zuckenried,
CH) ; Wartmann; Stephan; (Uttwill, CH) |
Assignee: |
GEOBRUGG AG
Romanshorn
CH
|
Family ID: |
41510817 |
Appl. No.: |
13/123730 |
Filed: |
October 22, 2009 |
PCT Filed: |
October 22, 2009 |
PCT NO: |
PCT/EP09/07558 |
371 Date: |
May 25, 2011 |
Current U.S.
Class: |
119/226 ; 140/7;
72/146 |
Current CPC
Class: |
Y02A 40/826 20180101;
Y02A 40/81 20180101; A01K 61/60 20170101; A01K 75/00 20130101; B21F
27/02 20130101; B21F 27/04 20130101 |
Class at
Publication: |
119/226 ; 140/7;
72/146 |
International
Class: |
A01K 63/00 20060101
A01K063/00; B21F 3/08 20060101 B21F003/08; B21F 27/00 20060101
B21F027/00 |
Foreign Application Data
Date |
Code |
Application Number |
Oct 28, 2008 |
CH |
01692/08 |
Claims
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.sup.2 to 2800 N/mm.sup.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.
Description
[0001] The invention relates to a net, in particular for a basket
for pisciculture, which may be placed in sea or fresh water, and a
method and device for production thereof.
[0002] It is known to use baskets made from nets for pisciculture
(see for example JP 2002 045084 or WO 96 13973). The net made of
plastic is generally knotted at the cross-over points, generally
has a rope diameter of approx. 2-8 mm, and must have relatively
small mesh openings of approx. 10-30 mm. Due to the correspondingly
large "material surface" there is a risk that animals and plants
such as e.g. algae, seaweed, moss, mussels, etc. will become
caught, held or will accumulate in these meshes, and this will have
a negative impact upon the penetrability of the net, and so upon
the pisciculture since the inflow of nutrients and the supply of
oxygen thus takes place unsatisfactorily.
[0003] EP-B-0 979 329 discloses a high-strength wire netting for
protection against is falling rocks or for securing a surface layer
of earth which is woven from high-strength steel wires bent in
spiral coils and has a three-dimensional structure. The wires bent
in spirals have a gradient angle and a length between two bends
which determine the shape and size of the meshes of the wire
netting.
[0004] The wire material is produced by a method in which the wire
is fed to a mandrel at the defined gradient angle and is bent in
the defined length around the mandrel by for example over approx.
180.degree., the wire having to be fed a number of times in its
longitudinal axis to the mandrel about the defined length and
having to be bent respectively around the mandrel. The method and
the device required for this purpose is relatively complicated and
correspondingly expensive.
[0005] The object underlying the present invention is to provide a
net of the type specified at the start and to propose a method for
inexpensive production of the latter with which the risk of
contamination and clogging of the net can be reduced.
[0006] This object is achieved according to the invention by a net
having the features of claim 1 and by a method according to claim
9.
[0007] Preferred further configurations of the net according to the
invention and of the method according to the invention, including
for other applications such as, for example, in architecture, form
the subject matter of the dependent claims.
[0008] The net according to the invention made of a wire material
which can be produced from individual spirally bent metal
longitudinal elements to form a cylindrical spatial spiral and
wherein the adjacent spirals are woven together, is simple and is
economical to produce. The longitudinal elements provided in
particular as wires are continuously bent to form the cylindrical
spatial spirals. Advantageously a number of wires or spirals can be
produced and woven together at the same time.
[0009] The wire material preferably made of stainless or
corrosion-resistant steel is substantially less prone to
contamination, clogging and the accumulation of animals and/or
plants such as algae, seaweed, moss, mussel types etc. than
conventional plastic nets or nets made of different materials which
are not correspondingly coated.
[0010] In this regard the use of wires made of copper-coated steel
can also be particularly advantageous for the wire material.
Different copper alloys and cladding coatings containing copper are
also suitable instead of the copper coating. Special repellent
plastic coatings are also suitable for preventing this clogging and
plant cover.
[0011] This type of net can also absorb dynamic forces and kinetic
energies, and so it can also be used for retarding processes in the
field of natural dangers, in safety technology, for shatter
protection and for further protective applications and protection
devices.
[0012] Due to corresponding weight reduction the preferred use of
high-strength wires with nominal strengths of approx. 1000
N/mm.sup.2-2800 N/mm.sup.2 enables significant application
advantages and material and cost savings, for example larger
baskets, and due to the smaller "material surface" less adhesive
surface for water animals and water plants, such as for example
algae, seaweed, moss, mussels etc.
[0013] In the following the invention will be described in greater
detail by means of the drawings. These show as follows:
[0014] FIG. 1 is a diagrammatic perspective view of a basket placed
in water with a net according to the invention,
[0015] FIG. 2 is a top view of a part of a net according to the
invention,
[0016] FIG. 3 is a side view of the part of the net according to
FIG. 2,
[0017] FIG. 4 is a side view of the part of the net according to
FIG. 2 wherein the wire material is pressed flat, and
[0018] FIG. 5 is a perspective view of a section of a device for
compressing spirally bent wires.
[0019] FIG. 1 shows a diagrammatically illustrated basket 10 which
is placed in water 16 here and is particularly intended for
pisciculture. The basket 10 is formed from a net 11 and is
preferably fixed to the sea bed 15 by attachment means 12, 13, and
said basket extends upwards to the surface of the water. Depending
on the depth of the water, currents, the tidal range and soil
characteristics there are also floating versions with different
types of attachment to the ground or the land and respective
combinations of the latter.
[0020] This basket 10 is rectangular in form here, but it can of
course also be of a different shape. The basket can be formed in
different shapes here, for example it can be round or square or
polygonal. For certain applications it is likewise advantageous if
the basket can also be closed at the bottom and/or at the top.
Depending on the incubation phase smaller baskets can also be
placed inside larger baskets, it being possible to provide
different mesh sizes.
[0021] In FIG. 2 and FIG. 3 a part of the net 11 intended for the
basket 10 is illustrated.
[0022] According to the invention the net is in the form of a mesh
1 which is made up of individual spirally bent metal wires 2, 3, 4,
5 as longitudinal elements. According to the invention the wires 2,
3, 4, 5 cut to a specific length are continuously bent into the
shape of cylinders (see in particular FIG. 3), the adjacent wires
2, 3; 3, 4; 4, 5; etc. being woven together. Advantageously a
number of wires can be bent at the same time and then be woven
together.
[0023] According to FIG. 2 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 or spirals are is bent are knotted to
form loops 2', 3', 4', 5'. The knotted ends in particular enable
economical force-fit connection to adjacent nets. Different types
of end loop connections of the wire ends of the individual spirals
(e.g. with press connections) can also be used instead of the
knots.
[0024] The flexible connection of individual wires 2, 3, 4, 5 makes
it possible to roll or fold up the wire material 1 for storage and
transportation.
[0025] The wires 2, 3, 4, 5 are preferably made of stainless steel
(for example inox) or of corrosion-resistant steel with which the
corrosion resistance is achieved by means of a suitable coating,
such as for example zinc/aluminum or copper alloys or by means of a
covering (for example plastic or cladding coatings). Combinations
of different coating methods are also possible. The net according
to the invention made of wire material is therefore substantially
less prone to contamination with, the accumulation of and clogging
with aquatic animals and plants such as for example algae, seaweed,
moss, mussels etc. than conventional nets made of plastic. In this
regard the use of wires made of copper-coated steel for the wire
material 1 is particularly advantageous.
[0026] Instead of the simple wire, ropes, cords or similar
materials can also be used to produce the net. When using ropes and
cords it is not necessary for all of the strands of the rope or
cord structure to be made of high-strength wires with nominal
strengths of 1000 N/mm.sup.2 to approx. 2800 N/mm.sup.2.
[0027] With the embodiment shown in FIGS. 2 and 3 the thickness of
the wire material 1 is defined by the diameter of the cylinder
shape. The net 11 allows relatively large elongations and
widenings. The production output when producing the net is high
particularly due to the continuous wire feed. Moreover, a number of
spirals can be produced and interwoven at the same time, and this
reduces production times by a multiple, and thus greatly reduces
production costs.
[0028] With a further possible embodiment of the net according to
the invention according to FIG. 4 the wire material 20 woven from
the wires 22, 23, 24, 25 bent into the cylindrical spatial spirals
are then further processed, for example pressed flat. With this net
which is less thick, flatter, but still three-dimensional in
comparison to the embodiment according to FIG. 2 and FIG. 3 less
wire is required for the same area. However, the net then allows
less elongation and widening, which can be essentially mechanically
or visually advantageous, however, depending on the type of
application.
[0029] Since the bent spirals spring back easily after being
pressed flat, this process must be implemented in stages over the
whole area of the net. With regard to the space required for
bending back the possibility of producing a number of spirals at
the same time is limited.
[0030] According to FIG. 5 a perspective view of a section of a
bending device 50 for pressing flat a spirally bent wire 2 is
provided. A partial device for producing the spirally bent wires is
not shown in any greater detail. The spirally bent wire 2 is
pre-produced here in an approximately cylindrical form.
[0031] The bending device 50 has stamps 52, 54 arranged in two rows
which can be moved in relation to one another laterally to the
longitudinal extension of the spiral wire 2 and are provided
respectively on the front face side with a guiding groove 52', 54'
centering the wire 2. These stamps 52, 54 which can be pushed to
and fro by a controllable drive are aligned in relation to one
another in two rows and are arranged a distance apart from one
another according to the gradient height h of the individual
spirals of the wire 2 so that they encompass to the side the spiral
wire 2 provided with a specific length with each spiral. In the
gripping position illustrated the stamps of the one row are spaced
apart from the other one such that the spiral wire 2 can be turned
into these guiding grooves 52', 54' of the stamps 52, 54. As the
wire 2 is turned in threading into the already compressed wire 3
advantageously takes place at the same time, by means of which the
net is produced in this way. In principle the stamps could however
then be pushed even further apart from one another, and the
pre-formed wire 2 could than be inserted. Starting from this
gripping position at least the stamps 52 or 54 of the is one row
are then moved in relation to the other stamps 54 or 52 by a
specific distance and here the spiral wire is compressed so 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.
[0032] There are provided above and below these stamps 52, 54
additional bending tools 55, 56 which can also be moved laterally
to the longitudinal extension of the spiral strands 2, 3 which are
arranged such that they produce bending back of the spiral wires 3
with the bends 3'' formed after the compression of the spiral wires
3. An optimal form of these wires 2, 3 is thus produced. The
bending tools 55, 56 serve, moreover, as a support for the spiral
wire 2 so that the latter can not be pressed away upwards or
downwards during the compression.
[0033] With this bending device 50 rational production allowing
different sizes of spiral wires is guaranteed within the framework
of the invention.
[0034] The net according to the invention in the form of a wire
material and which is produced from individual spiral (or in a
shape similar to a spiral) metal wires bent to form a cylindrical
(or in a shape similar to a cylinder) spatial spiral, and with
which the adjacent wires or spirals are interwoven, is simple and
economical to produce. The wires are continuously bent into the
cylindrical spatial spirals. Advantageously a number of wires or
spirals can be produced and be interwoven at the same time.
[0035] With at least some of the interwoven wires a substantially
straight longitudinal reinforcement element can be guided through
the linkage region of the two spiral interwoven wires by means of
which the meshes formed in diamond shapes are divided into
triangular meshes.
[0036] Instead of wires, other longitudinal elements such as for
example ropes or cords or a combination of the latter, or also
strips, pipes, metal sheets etc. can also be used.
* * * * *