Note : Les descriptions sont présentées dans la langue officielle dans laquelle elles ont été soumises.
CA 02369248 2002-O1-24
A FASTENING APPARATUS FOR INSECT PROTECTION SCREENS
AND/OR SOLAR SCREEN FABRICS
FIELD
The invention relates to a fastening apparatus for
insect protection screens, solar screen fabrics or the like
on openings, especially for windows or doors.
BACKGROUND
The protection from insects can occur within closed
rooms by means of chemical agents with the disadvantage of
health impairment and problems with environmental
protection and in a constructional manner by fly or
mosquito protection nets or screens. Particularly in
countries or regions with a relatively high share of
natural landscape, protection from insecas has a high
relevance in respect of health and economy under respective
climatic conditions.
The fastening of the fly screen to openings such as
windows or doors poses problems. Often, a fly protection
screen is fastened by nails on window or door frames. The
disadvantage is in this case that as a result of the
punctiform transmission of force, the fl.y screen will tear
under loads, nails can only be hammered into wood not into
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plastic frames and irreversible damage is caused after
extracting the nails.
From DE-OS 4128491 a mounting frame for receiving
sheeting and screens are known. Four pieces of squared
wood are cut in a mitred way at the ends, so that the same
can be added to a frame at the corners with the help of
mounting squares. The frame can then be fixed to a window
frame disposed underneath the same. The fly screen is
clamped between the angular part and the outer edge of the
frame and thus fastened. The disadvantage is that for
fixing the fly screen angular parts need to be screwed onto
each side of the frame and there is no tensioning of the
fly screen during the clamping and mounting process, so
that the same is not held in a taut manner. Moreover, the
pieces of squared wood are not resistant to weathering and
require a fair amount of work to be invested.
Accordingly, it is the object of the present invention
to provide a fastening apparatus that eliminates the
aforementioned disadvantages while offering at the same
time a simple constructional design.
This object is achieved by a fastening apparatus
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according to the features of claim 1: Preferable
embodiments are the subject matter of the sub-claims.
SUNR2ARY
The present fastening apparatus for insect protection
screens, solar screen fabrics or the like consists of two
profiled elements, namely an upper and a lower part which
are arranged in such a way that they ca:n be joined into a
frame-like fastening apparatus by a clamping process.
During the clamping process the fly screen or the
protective fabric is clamped between the two profiled
elements, which means that they are thus also fastened, and
additionally pulled in slightly to the outer side, so that
the screen, fabric or net is tensioned automatically. The
ends of the profiled element are cut in a mitred manner, so
that they can be joined into a blind frame. The lower part
is screwed or glued to the window or door frame or fastened
by means of hinges as a swivel frame. The upper part is
then clipped onto the same by the clamping process.
Preferably, the lower part is arranged in the cross
section as a U-profile, with the lower side being glued
fixedly to the window or door frame or being screwed on
with the help of bores in the lower side, namely the middle
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leg. The outer leg of the lower part is clearly larger
than the inner one and at the end of the outer leg a guide
rail is formed by two bridges rectangularly to the inner
side, with the lower bridge preferably being approximately
twice as long as the upper bridge. At the end of the inner
leg an enlargement is formed towards the inner side; so
that a snap-in recess is formed. The upper part is
arranged in the cross section as an L-shaped profile, with
the end of the leg facing the outer side being provided
with an offset towards the inner or lower leg. The end of
the second leg is provided with an enlargement facing the
inner side.
For producing a blind frame or for fastening a fly screen
or other fabric/screen, the lower parts, which are cut in a
mitred way, are joined into a rectangular (or triangular or
trapezoidal) frame and fixed on the window or door frame.
Then the fly screen is placed on the lower part and the
offset leg of the upper part is inserted into the guide
rail of the lower part. By exerting a force on the upper
part, the enlargement of the second leg of the upper part
latches into the recess of the inner leg of the lower part.
Simultaneously, the interposed fly screen is clamped and
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thus fastened. The fly screen is entrained outwardly by
the latching process and is thus tautly stretched. By
repeating this process at all four sides, the fly screen or
the fabric/screen can be fastened completely and stretched
completely evenly at the same time. All materials such as
aluminium and plastic which are also used in the
construction of windows for such profiles can be considered
as materials for the upper and lower parts.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention itself both as to organization and
method of operation, as well as additional objects and
advantages thereof, will become readily apparent from the
following detailed description when read in connection with
the accompanying drawings:
Fig. 1 shows a cross section of an upper part;
Fig. 2 shows a cross section of a lower part;
Fig. 3 shows a cross section through the fastening
apparatus on a window frame; and
Fig. 4 shows a view of a fastening apparatus as a blind
2 5 f rame .
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DETAILED DESCRIPTION
Fig. 1 shows the upper part 1 of the fastening
apparatus 12 in a cross-sectional view. It comprises an L-
shaped profile, with one end of the leg 17 comprising an
offset 3 facing towards the inner side and the other end of
the second leg 18 comprising an enlargement 4 facing
towards the outer side.
Fig. 2 shows the lower part 2 of the fastening
apparatus l2 in a cross-sectional view. It essentially
comprises a U-shaped profile. Bores for screws 14 are
provided on the middle leg 8 on the lower side. Two
bridges 5, 6 are disposed rectangularly at the end of the
outer leg 9, with the upper bridge being half as long as
the lower bridge 6. A kind of guide rail 7 is thus formed.
The leg 10, which is at the right-hand side in this case
and whose length is approximately one-third of the length
of the outer leg 9, is enlarged towards the inner side,
thus producing a recess 11 into which the enlargement 4 of
the upper part 1 engages during assembly.
Fig. 3 shows a cross-sectional view of the fastening
apparatus 12 for a protective screen, fabric or fly screen
15 which is shown in dotted lines and consists of an upper
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part 1 and a lower part 2. The lower part 2 is fixed at
first with the help of adhesive tapes or screws to window
frame 13 or is placed in holding parts provided thereon.
Thereafter the fly screen 15 is placed on lower part 2.
The offset leg 17 of the upper part 1 is pushed into the
guide rail 7 of the lower part 2, as is shown with the
broken line. As a result, the end of a leg 18 of the upper
part 1 rests on the end of the inner leg 10 of the lower
part 2 (dotted illustration). By applying a pressing force
19 on the upper part 1 the enlargement ~ of the leg 18
latches into the recess 11 of the inner leg 10, as a result
of which the upper part 1 and the lower part 2 are mutually
connected by bracing within the two components. The fly
screen 15 is also fastened by the pressing force between
the enlargement 4 and the recess 11. The relevant aspect
is that during the latching or snap-in process the fly
screen 15 is entrained by the enlargement 4, so that the
same is tensioned with bias in the frame. A fly screen or
protective screen/fabric can be clamped in a taut way by
repeating this process at all four sides of the fastening
apparatus 12 of the blind frame 20.
Fig. 4 shows a view of the fastening apparatus 12 as a
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rectangular blind frame 20 on a window frame 13. By using
corner connectors or mitred cuts 16 at the four ends of the
fastening apparatus 12, they can be joined into a
rectangular (or triangular or trapezoidal) blind frame 20.
The fly screen 15 is fixed completely at all four sides by
the four fastening apparatuses 12.
In summary, the present invention allows the simple
and cost-effective fastening of fabrics/protective screens
or fly screens by using materials known from the
construction of window and door frames, with the stretching
of the fabric/screen or fly screen being substantially
facilitated by the draw-in during the fastening. This
ensures taut clamping and helps to achieve low mounting
costs. Moreover, a stable construction is obtained which
can also be used as an ~~unsupported" insect protection
screen in the door area.
Accordingly, while this invention has been described
with reference to illustrative embodiments, this
description is not intended to be construed in a limiting
sense. Various modifications of the illustrative
embodiments, as well as other embodiments of the invention,
will be apparent to persons skilled in the art upon
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reference to this description. It is therefore
contemplated that the appended claims will cover any such
modifications or embodiments as fall within the scope of
the invention.
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