DEVICE ABLE TO KEEP EDGES OF BLINDS, IN PARTICULAR MOSQUITO-NETS, IN ADHESION WITH RELEVANT FRAMES

Abstract: A device able to keep edges of blinds, in particular mosquito-­ nets, in adhesion with relevant frames is disclosed; said device comprising: a supporting element (1) for a stopping lever (2) of a blind (3); said supporting element (1) being able to be engaged on a front wall (4) of a channel (13) of a frame (5); said lever (2) being able to be moved within a first and a second stopping posi­ tion (A,B) and vice-versa; a longitudinal strip of a material having a high friction coefficient is housed in a groove (12) of said profile (13); said lever (2) having an arched end (24) able to cooperate with said longitudinal strip to stop a first and a second edge (6,7) of said blind (3) on said frame (5).

Description: The invention is related to a device able to keep edges of blinds, in particular mosquito-nets, in adhesion with relevant frames to prevent said edges from detaching for gustes or similar causes. At present the edges of said blinds are inserted into longitudinal guide grooves made in frames applied to window ports or the like. These solutions entail, as more grave disadvantage, possible detachings of said edges from said grooves; these detachings, due to gusts or similar causes, void the scope of the presence of said blinds on the ports encircled by said frames. A device able to keep edges of blinds in adhesion with relevant frames in accordance with the preamble of Claim 1 is known from US - A - 2 084 847. This device includes: a supporting element adapted to be fixed on a front wall of a channel of a frame; one pair of the frames being able to house a blind; the frame being formed by at least one pair of the channels; the supporting element being able to support an egaging element for the edges of the blind on an inner surface of the channel. The manoeuvre to move the engaging element from an engaging position to a release position is obtained by operating a tie rod to rotate the supporting element. This tie rod is supported by the frame of the screen and is fitted with stopping elements to stop it in said positions. The stopping elements are provided with devices for the adjustment of the distance between the stopping elements of the tie rod and the supporting element in order to solve problems of assembly and of use of the device; this is a part of a complicated and expensive structure fixed to the frame. US - A - 1 751 950 refers to a mechanism for clamping the side edges of a rolling screen when extended to its operative position in order to ensure tight closing of the window to which the screen is applied, at the same time preventing possible bulging or distorsion of the screen, due to the wind pressure or to other causes. The clamping mechanism shall operate effectively and automatically upon the screen attaining its fully extended position. The mechanism is a part of a structure fixed to the frame; in addition, it shows egaging elements for the edges of the screen, whose manoeuvre is difficult and which cause damage to the same edges. The invention is intended to remedy these disadvantages of the prior art. The invention as it is charachterized by the claims, solves the problem of how to realize a device, able to keep edges of blinds, in particular mosquito nets, in adhesion with relevant frames. By using a device according to the present invention, the following results are achieved: the edges of said blinds do not excape from said guide groove under the thrust of forces due, for example, to gusts. The advantages achieved by using a device according to the present invention consist essentially in the fact that it is possible to shelter said window ports from the entrance of insects, in any ambient condition or state of the atmosphere; it is further possible to prevent said edges from being worn by the exit of the blind from said guide grooves. The device is distinguished by the fact that it has a long working life. The invention is described in detail below by referring to the attached drawings which represent a not restrictive embodiment in which: Fig.1 is an exploded perspective view of an assembly configuration of the device according to the present invention. Figs. 2, 3, 4 and 5 show constructive details of the device according to the present invention. The figures show a device, able to keep edges of blinds, in particular mosquito-nets, in adhesion with relevant frames including essentially a supporting element 1 for a stopping lever 2 of a blind 3 having lateral edges 6 and 7; said supporting element 1 being adapted to be engaged on a front wall 4 of a channel 13 of frames 5; each of said frames 5 is provided with a longitudinal groove 12 adapted to house said lateral edges 6 and 7. Said supporting element 1 is fitted with a first and a second hooking structure 8 and 9 located at a first and at a second end 10 and 11 of said element 1, respectively; said hooking structures 8 and 9 permitting slidable engagement of said element 1 on a front wall 4 of a channel 13, by hooking on edges 14 and 15, protruding from a front wall 4 of a frame 5, respectively. Inside the longitudinal groove 12, said channel 13 is provided with opposite moldings 16 and 17 developing along the whole length of said channel 13. On each of said moldings 16 or 17 adheres a longitudinal strip, not shown, made with a material having a high friction coefficient and toward which a face of one of said edge 6 or 7 is disposed so that each edge 6 or 7 is located between two of said strips. To obtain a suitable support for the blind 3 it is necessary to use two frames 5. Said lever 2 is equipped with a shaft 18 supported by two holes 19a, 19b made in said supporting element 1; said lever 2 rotates about said shaft 18 within a first stopping position A and a second position B and vice-versa. Said positions A and B being defined by the insertion of two ends 20a and 20b of a pin 21, included in said lever 2, in a first pair of holes 22a and 22b and in a second pair of holes 23a and 23b, respectively; said first pair of holes 22a and 22b and said second pair of holes 23a and 23b being made in said supporting element 1. Said lever 2 is fitted also with a first lever arm 24 and with a second lever arm 25; said first arm 24 being able to permit movements from said first position A to said second position B and vice-versa. Said second arm 25 is provided with an end 26, preferably arched, cooperating with said longitudinal strip to fix said first or second edge 6 and 7, with respect to said frame 5 when said lever 2 is in said position A. This is only one of the possible embodiments of the invention which may be varied without modify its essence. In particular, in one preferred embodiment of the invention, only one strip is located in said molding 17 to engage edge 6 or 7 from the opposite port on which said arched end 26 acts. In one embodiment, not shown, said device consists of a supporting element adapted to be engaged on said channel 4 of said frame 5 by fixing means; said supporting element being able to house a rod fitted with a first end able to cooperate with said longitudinal strip to fix said edge 6 (or 7) with respect to said frame 5 under the action of a spring. Said rod is integral with a piston housed in said supporting element to guide said rod within said supporting element; a first end of said spring biasing said piston to move said rod toward said longitudinal strip. A hole being made in said wall 4 to allow insertion of said rod in said frame 5. Said supporting element is also provided with a wall on which a second end of said spring biases; said wall having a hole allowing an operating element for said piston to exit from said supporting element. In a further embodiment, not shown, said longitudinal strips are missed out. Therefore said stopping means for said edges cooperates directly with an inner wall of said channel to engage said edges on said frame.

Claims: Device able to keep edges of blinds, in particular mosquito nets, in adhesion with relevant frames, including: a supporting element (1) fitted with fixing means (8,9) to fix said supporting element (1) on a front wall (4) of a channel (13) of a frame (5); one pair of said frames (5) housing a blind (3) and in particular a first and a second edge (6,7) of said blind (13), said frame (5) being formed by at least one pair of said channels (13); an engaging element (2) for said edges (6,7) of said blind (3) on an inner surface (17) of said channel (13), said engaging element (2) being supported by said supporting element (1), characterized by the fact that said supporting element (1) supports a stopping lever (2) for said blind (3), said lever (2) being fitted with a shaft (18) and a first lever arm (24); two holes (19a,19b) being provided in said supporting element (1) to support said shaft (18) and said first lever arm (24) moving said lever (2) from a first stopping position (A) to a second position (B) and vice-versa; said positions (A,B) being defined by the insertion of two ends (20a,20b) of a pin (21), included in said lever (2), in a first pair of holes (22a,22b) and in a second pair of holes (23a,23b), respectively, said first and second pair of holes (22a,22b, 23a,23b) being made in said supporting element (1); said lever (2) being further provided with a second lever arm (25) having an arched end (26) engaging said first or said second edge (6,7) to stop said first or said second edge (6,7) with respect to the surface of a molding (17) internal to said frame (5) when said lever is in said stopping position (A). Device as in claim 1, characterized by the fact that said arched end (26) cooperates with a longitudinal strip of a material having a high friction coefficient to stop said first or said second edge (6,7) with respect to said surface of said molding (17), said strip being adherent to said molding (17). Device as in claim 1, characterized by the fact that said supporting element (1) comprises structures (8,9) for slidably engaging said supporting element (1) on said channel (13). Device as in claim 3, characterized by the fact that said structures (8,9) are U-shaped and are provided at a first and a second end (10,11) of said supporting element (1), respectively. Device as in claim 1, characterized by the fact that said supporting element (1) supports a rod having a first end which engages said edges (6,7) with respect to said frame (5); said supporting element housing a spring biasing said rod toward said surface of said molding (17) and a piston which guides said rod inside said supporting element (1), said piston being integral with said rod; a hole being made in said channel (13) for introduction of said rod in said frame (5), said supporting element (1) having a wall on which a second end of said spring biases and in which a hole is made to permit an operating element for said piston to exit from said stopping element. Device as in claim 5, characterized by the fact that said first end of said rod cooperates with said longitudinal strip to engage said edges (6,7) with respect to said frame (5).

Inventors: PICCIONI, TOMASO
Applicants: SUNCOVER S.R.L.
Application year: 1988
Main classification: E06B9
IPC codes: E06B9