Classifications

• • E—FIXED CONSTRUCTIONS
  • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
  • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
  • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
  • E06B9/02—Shutters, movable grilles, or other safety closing devices, e.g. against burglary
  • E06B9/06—Shutters, movable grilles, or other safety closing devices, e.g. against burglary collapsible or foldable, e.g. of the bellows or lazy-tongs type
  • E06B9/0607—Shutters, movable grilles, or other safety closing devices, e.g. against burglary collapsible or foldable, e.g. of the bellows or lazy-tongs type comprising a plurality of similar rigid closing elements movable to a storage position
  • E06B9/0615—Shutters, movable grilles, or other safety closing devices, e.g. against burglary collapsible or foldable, e.g. of the bellows or lazy-tongs type comprising a plurality of similar rigid closing elements movable to a storage position characterised by the closing elements
  • E06B9/063—Bars or rods perpendicular to the closing direction
• • E—FIXED CONSTRUCTIONS
  • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
  • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
  • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
  • E06B9/02—Shutters, movable grilles, or other safety closing devices, e.g. against burglary
  • E06B9/06—Shutters, movable grilles, or other safety closing devices, e.g. against burglary collapsible or foldable, e.g. of the bellows or lazy-tongs type
  • E06B9/0607—Shutters, movable grilles, or other safety closing devices, e.g. against burglary collapsible or foldable, e.g. of the bellows or lazy-tongs type comprising a plurality of similar rigid closing elements movable to a storage position
  • E06B9/0646—Shutters, movable grilles, or other safety closing devices, e.g. against burglary collapsible or foldable, e.g. of the bellows or lazy-tongs type comprising a plurality of similar rigid closing elements movable to a storage position characterised by the relative arrangement of the closing elements in the stored position
  • E06B9/0669—Shutters, movable grilles, or other safety closing devices, e.g. against burglary collapsible or foldable, e.g. of the bellows or lazy-tongs type comprising a plurality of similar rigid closing elements movable to a storage position characterised by the relative arrangement of the closing elements in the stored position stored in a zig-zag arrangement

Definitions

• Object of the present invention is a new lifting system for a disappearing protection grille with folding packing, which allows to reduce the space taken in the box by the grille, after its lifting.
• the system object of the present invention can work without using chains, pinions, racks and bushings with different lengths or diameters, as it occurs in the current state of the art, and therefore it is advantageous in terms of costs, dimensions, weight and easiness of usage.
• various lifting systems for disappearing protection window frames At the state of the art there are known various lifting systems for disappearing protection window frames.
• the present invention relates to protection grilles comprising a series of parallel horizontal "bars", arranged at the same distance with respect to each other, each adjacent couple of bars being connected by one or more connecting rods hinged on the same bars, so that it is allowed the rotation of the connecting rods with respect to the bars, but not the axial displacement of the same.
• a protection grille as the one described is lifted back by winding it on a cylinder which, obviously, has an increasing diameter as the number of the meshes rolling thereon increases. Therefore, there are needed great boxes which force to reduce the height of the door or window protected by the grille, in addition to invade the inner space of the room.
• a second device known at the state of the art for example presented on the market by Sairam company, was proposed as an improvement in terms of reduction of the excessive dimensions caused by the lifting chain housing of the above cited patent.
• the end connecting rods have been modified by adding backwards projecting toothing which, by engaging one motorized pinion arranged in the upper portion, allow the grille to be lifted eliminating the use of the chain, which is substituted by the same toothed connecting rods.
• the connecting rods have the double function of guaranteeing the continuity of the grille and of allowing the same to be lifted.
• this embodiment leads to the need for extensions of different length at the ends of the grille bars, and so to arrange the guides which allow the packing on two different planes.
• Aim of the present invention is to provide a lifting device for disappearing protection grilles which solves the drawbacks linked to the embodiments known at the state of the art.
• the present invention provides a disappearing protection grille which, in comparison to the state of the art, allows to reduce costs, assembling times and dimensions, thus eliminating the use of complex mechanisms such for example chain dragging, the provision of guides arranged on different planes or the use of toothed connecting rods.
• the present invention provides a disappearing protection grille, whose ease of actuation allows the use of a manual control, which is useful in case of failure of the electric motorization, but also as a substitute of the latter at least for the -smallest grilles.
• the present invention provides a disappearing protection grille whose mechanism allows to solve the generally known drawbacks linked to the width of the disappearing grilles.
• the present invention achieves the prefixed aims since it is a lifting device for disappearing protection grilles comprising a grille made up of a series of parallel bars having bushings of equal length at the ends and constrained by connecting rods; guides at least partially shaped as concentric arcs to an axis, the final sections of said guides being arranged so that the packing of the protection grille is allowed; wheels shaped as equilateral polygon with even number of sides having recesses in each vertex at alternate distance from the centre which allow to engage the bushing relative to adjacent bars, characterized in that in the lifting step of the grille the shaped wheels constrain the bushing engaged in the recess arranged at major distance from the centre to engage the outer guide, while the next bushing, engaged in the recess arranged at minor distance from the centre is pushed by the dragging force exerted by the previous bushing and by the weight
• fig. 8 it is shown a tridimensional assembly view of the embodiment of figure 7. Referring to fig. 1 in which it is described the geometry of a preferred embodiment of the device, it is possible to highlight that this one comprises a guide (1) in which the grille (2) slides.
• Said grille (2) is provided with a series of parallel bars (4) connected by connecting rods (3) .
• the connecting rods (3) can rotate with respect to the bars (4) .
• the bars (4) are constrained so that they have to slide inside the guide (1), in which there are engaged the bushings (5) provided at both ends of each of said bars (4) .
• Said bushings (5) can be conveniently all of the same length.
• the lifting device comprises also a shaped wheel (10), whose geometric features according to a preferred embodiment are shown in figure 2, which shaped wheel is assembled so that it can rotate around an axis of rotation (24) parallel to the direction in which the bars (4) of the grille are arranged.
• the shaped wheel (10) is shaped as an equilateral polygon with even number of sides (4 sides in figure 2), and at each vertex has a recess (12, 13) apt to be engaged by the bushing (5) arranged at the end of each bar (4) .
• the geometry of the shaped wheel (10) is such that two adjacent recesses (12, 13) are always at such a distance that the bushings (5) of adjacent bars engage in sequence said recesses.
• the bars (4) can engage said recesses (24).
• Said recesses (12, 13) have also the feature, visible in fig.
• the bushing (5) enters and goes out from the recess in which it is housed, when the adjacent bushing is yet engaged, thanks to the shape of said grooves having jointing spokes (16) and (17) which determine the rotation of the entering bushing (51) around the axis of the engaged bushing (5) .
• each couple of recesses (12, 13) belonging to the adjacent vertexes of the polygon is arranged so that it is at different distance from the axis of rotation (24 ) .
• the bushings (5, 18) slide upwards on the guide (1) until they arrive to the upper portion of said guide, from which other two guides (6, 7) extend, which have at least a first section of circular shape.
• Said guides (6, 7) are arranged concentrically with respect to the centre of this first section of circular shaped guide.
• the centre of these circular guides corresponds to the axis of rotation (24). Referring to figure 1, (7) indicates the inner guide and (6) the outer guide.
• the arrangement of the axis of rotation (24), of the shaped wheel (10) and of the guides (1, 6, 7) is such that the bushings (5, 18) are introduced alternately in one of the two concentric guides (6, 7), thus allowing the disappearing closing shown in figs. 1, 4, 5 and 6 to be realized.
• the device functioning is better described in the following.
• the scheme of the forces acting on the bushing (5) in figure 3 is such that on the same it is provided a component directed inwards, which pushes the bushing (5) to engage the recess (13) correctly and so to enter the inner concentric guide (7) .
• a baffle (8) limits the bushing movement along the engaged path.
• said guides (6) and (7) extend at least for a circle arc (22) greater than 180°.
• the two guides (6) and (7) continue separated accompanying the bushings until the packing (11) which, as a whole, allows a very reduced and well lower depth than the one according to the state of the art.
• the final portion of the guides where the packing of the grille (11) occurs can be conveniently arranged vertically as it is shown in figure 1, horizontally as it is shown in figure 4 or according to what is best suited to the particular situation without departing from the scope of the present invention.
• This aspect represents a simplification and a space gain, while the task to shunt alternately the bushings on one or the other guide is carried out by the shaped wheels (10), which have also the task of the grille lifting.
• a motorized actuation can be arranged on the axis (24) connecting said shaped wheels (10) .
• a gear-motor can be introduced inside the tube connecting the shaped wheels (10), with further saving in terms of space and structural simplification with respect to the state of the art.
• Another advantage of the device according to the present invention is the possibility to use guides (1) which are not necessarily vertical.
• the device is in fact able to work perfectly also with inclined linear or curved profiled guides (for example having parable arc shape) .
• the invention can be organized as in fig. 5 or as in fig. 7.
• fig. 5 it is shown an embodiment of the device in which the winder (23) for the obscuring device is arranged behind the grille (2), under the shaped wheels (10) and before the vertical packing (11), which is conveniently backed to accommodate the roller shutter.
• the only variation with respect to the embodiment yet described is in the geometry of the final portion of the guides. In this case the engagement arc of the bushings for the lifting is greater than 180° but at least two bushings are always engaged.
• one of the guides for the bushings has a width greater than the one strictly needed to make the bushings slide, so that it is prevented that in the horizontal lifting or displacement, the small inclination of the connecting rods can cause an increase in friction up to their blocking.
• the guide (7) shown in fig. 1 and 4. In particular it is the inner side of the guide (7), which is distanced from the outer side, thus increasing the useful width for the connecting rods.
• the invention can be organized also with horizontal packing as it is shown in fig. 4, where the guides (6) and (7) extend in horizontal while the entering, selection and dragging system remains the same of the basic scheme of figs. 1, 2 and 3.
• the device according to the present invention admits also the possibility of a manual control, shown in fig. 4, which is also suitable for the other configurations of fig. 1 and fig. 5, and which is made up of a pulley (26) integral with the axis of rotation (24) on which a roller shutter belt or steel cable (27), which is provided with a crank organ (28), winds u .
• the device object of the present invention can comprise obscuring winding means, such for example a rolling gate or a roller shutter, configured to be conveniently wound without increasing the device dimensions.
• obscuring winding means such for example a rolling gate or a roller shutter
• the device comprises obscuring winding means which wind up around a rotating winder (23) arranged inside the region defined by the guides (1) in the front portion and by the end portion (11) in the rear portion of the guides of the grille.
• the winder for the obscuring winding means can rotate around the same axis (24), which is suitably provided with a shaft concentric to the one where there are keyed the shaped wheels (10) and is able to rotate independently of the same.
• To the obscuring means can be also associated electric movement means, which are positioned concentrically to the axis (24) or near the same. Using the mechanisms known at the state of the art, it is also possible that only one electric actuation means actuates, selectively, the grille or the obscuring means.

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• Engineering & Computer Science (AREA)
• Structural Engineering (AREA)
• Architecture (AREA)
• Civil Engineering (AREA)
• Accommodation For Nursing Or Treatment Tables (AREA)
• Packaging Of Machine Parts And Wound Products (AREA)
• Packages (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (1)

Family

ID=43976814

Family Applications (1)

Country Status (3)

Cited By (2)

Citations (4)

• 2011
  • 2011-03-10 IT IT000010A patent/ITBA20110010A1/it unknown
• 2012
  • 2012-03-09 WO PCT/IB2012/051132 patent/WO2012120483A1/en active Application Filing
  • 2012-03-09 EP EP12713784.2A patent/EP2683901B1/en not_active Not-in-force

Patent Citations (5)

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