EP3636872B1 - Geweberollo - Google Patents

Geweberollo Download PDF

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Publication number
EP3636872B1
EP3636872B1 EP19202076.6A EP19202076A EP3636872B1 EP 3636872 B1 EP3636872 B1 EP 3636872B1 EP 19202076 A EP19202076 A EP 19202076A EP 3636872 B1 EP3636872 B1 EP 3636872B1
Authority
EP
European Patent Office
Prior art keywords
retention element
blind
section
fabric
interference position
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP19202076.6A
Other languages
English (en)
French (fr)
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EP3636872A1 (de
Inventor
Moreno FRANCALANCI
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Palagina SRL
Original Assignee
Palagina SRL
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Publication date
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Publication of EP3636872A1 publication Critical patent/EP3636872A1/de
Application granted granted Critical
Publication of EP3636872B1 publication Critical patent/EP3636872B1/de
Active legal-status Critical Current
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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
    • E06B9/24—Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; Slat blinds
    • E06B9/40—Roller blinds
    • E06B9/42—Parts or details of roller blinds, e.g. suspension devices, blind boxes
    • 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
    • E06B9/56—Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor
    • E06B9/80—Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling
    • E06B9/82—Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling automatic
    • E06B9/86—Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling automatic against unauthorised opening
    • 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
    • E06B9/56—Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor
    • E06B9/80—Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling
    • E06B2009/801—Locking arrangements
    • E06B2009/804—Locking arrangements acting directly on the shutter
    • 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
    • E06B9/56—Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor
    • E06B9/80—Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling
    • E06B2009/801—Locking arrangements
    • E06B2009/805—Locking arrangements located on or in the guides

Definitions

  • the present invention regards a fabric roller blind according to the preamble of the independent claim number 1.
  • the present fabric roller blind is intended to be advantageously employed for adjustably closing provided openings of building walls particular of windows, of doors, of French windows, of skylights and similar windows/doors/shutters.
  • the blind, object of the present invention is therefore inserted in the industrial field of production of windows/doors/shutters, or also in the field of production of fabrics for protecting from the sun, in the field of mosquito netting or similar applications.
  • Blinds for closing openings of windows/doors/shutters are known on the market, and are provided with a rolling-shutter box which is fixed to a building wall or to a ceiling above the opening to be closed and houses a roller therein on which a flexible fabric is susceptible of being wound and unwound.
  • the fabric usually has rectangular shape and is provided with an upper edge fixed to the roller and with a lower edge fixed to a bottom bar aimed to stretch the fabric itself.
  • the blind comprises two lateral guideways vertically arranged along the corresponding sides of the opening and with which the bottom bar is slidably constrained.
  • the bottom bar comprises an aluminum section closed at the lateral ends by two lateral terminations slidably coupled to the respective lateral guideways.
  • Each lateral guideway is obtained with a corresponding aluminum profile with rectangular section, internally hollow and provided with an internal side (facing the internal side of the other lateral guideway) on which a longitudinal slit is made in which the corresponding lateral termination of the bottom bar is slidably inserted.
  • each lateral guideway is longitudinally extended between an upper end, fixed to the rolling-shutter box, and a lower end closed by a base terminal fixed to the floor at the lower edge of the opening.
  • the roller of the blind is actuatable, typically by a motor, to rotate in order to move the fabric between a collected position, in which the fabric is wound around the roller with the bottom bar arranged in abutment against the rolling-shutter box, and an extended position, in which the fabric is unwound from the roller to close the opening and the bottom bar is arranged at the base terminals placed at the lower ends of the lateral guideways.
  • blinds are known on the market that are provided with a locking mechanism adapted to automatically lock the bottom bar to the base terminals when the fabric is brought into the extended position, and to unlock the bottom bar from the base terminals when it is necessary to re-wind the fabric around the roller in order to bring the fabric into the collected position.
  • One example of such locking mechanism of known type comprises a pair of coupling levers mounted on the corresponding lateral terminations of the bottom bar and intended to slide within the respective lateral guideways during the movement of the bottom bar.
  • Each coupling lever is hinged by means of a central pin to the corresponding lateral termination in a manner such to be able to idly rotate with respect to a rotation axis parallel to the bottom bar.
  • each lateral guideway is internally provided with a shaped retention seat, in which the corresponding coupling lever is susceptible of being locked when the bottom bar is brought to the base terminal itself.
  • a first drawback of the blind of known type described briefly above is due to the fact that it requires arranging specific lateral guideways of increased width in order to allow the coupling levers to rotate within the base terminals of the guideways themselves, with consequent increases of the blind production costs.
  • the coupling levers must have relatively large sizes since, when the bottom bar is locked to the base terminal, such levers must sustain the traction force exerted by the motor which pulls the bottom bar upward, with consequent further need to employ lateral guideways of increased size.
  • this blind of known type comprises two sliders, each of which slidably constrained to the bottom bar and provided with an engagement portion slidably engaged with the corresponding lateral guideway and with a separate guide portion.
  • two locking elements are provided, each of which fixed to the respective lateral guideway and provided with a shaped channel within which the guide portion of the corresponding slider is slidably inserted when the fabric is in the extended position.
  • the bottom bar is actuated by the motor of the blind to slide downward until it reaches the locking elements, at which the guide portion of each slider enters into the shaped channel of the corresponding locking element through an inlet opening of the channel and slides within the latter up to reaching a first lower end stop portion of the shaped channel itself. Then, the motor drives the bottom bar to ascend until the guide portion of each slider reaches an abutment portion of the corresponding shaped channel, which stops the ascending of the bottom bar so as to lock the fabric in the extended position.
  • the motor In order to bring the fabric back into the collected position, the motor actuates the bottom bar to descend in a manner such that the guide portion of each slider slides in the shaped channel of the corresponding locking element up to reaching a second lower end stop of the shaped channel. Then, the motor drives the bottom bar to ascend in a manner such to carry the guide portion of the slider towards an outlet end of the shaped channel, so as to release the slider from the corresponding locking element, allowing the bottom bar to continue the ascent towards the rolling-shutter box of the blind.
  • a first drawback is tied to the fact that the motor which moves the fabric, and thus the bottom bar, is technologically complex and, consequently, quite costly since it must be set with multiple internal end stops which allow the guide element to slide within the shaped channel of the locking element, in particular in order to lock the motor at the first lower end stop portion, at the abutment portion and at the second end stop portion of the shaped channel.
  • a second drawback is due to the fact that the vertical distance between the abutment portion and the first lower end stop portion of the shaped channel of the locking element is relatively large and, consequently, when the fabric is in the extended position the bottom bar is spaced from the base of the opening by a relatively wide slit, which is closed by fixing a very thick balloon-like seal to the bottom bar, which among other things deteriorates the appearance of the blind.
  • a further drawback is due to the fact that, if one couples the locking element to only one of the lateral terminations of the bottom bar, in the subsequent movement attempts of the latter one releases the locking element on the lateral termination that was previously coupled and one couples the locking element on the other lateral termination that was not coupled before. This implies that often the user tries to couple the locking element that he/she did not couple by pressing the bottom bar downward with his/her foot, and this can irreversibly damage the locking mechanism of the blind by breaking, for example, the guide element of the slider.
  • each locking element comprises a shaped lever, which is provided with a coupling portion and is actuatable by the corresponding lateral termination of the bottom bar to engage and disengage its own coupling portion with/from the lateral termination itself. Also this solution is susceptible of operating and structural optimizations.
  • the problem underlying the present invention is to provide a fabric roller blind which is structurally simple and inexpensive to produce, in particular without requiring the use of complex and costly motors.
  • Another object of the present invention is to provide a fabric roller blind which prevents the formation of wide slits between the bottom bar and the base of the opening when the fabric is unwound, in particular avoiding the need to employ bulky closure seals on the bottom bar itself.
  • Another object of the present invention is to provide a fabric roller blind which considerably reduces the risk of breakage or damage, in particular in the case of jamming of the locking mechanism.
  • Another object of the present invention is to provide a fabric roller blind which is entirely efficient functionally and entirely reliable in operation.
  • reference number 1 indicates the fabric roller blind, object of the present invention.
  • the blind is operatively employable for adjustably closing an opening A of a window/door/shutter, for example of a window, of a door or of a French window, made in a load-bearing element such as the wall of a building or the load-bearing structure of any one building.
  • the blind 1 comprises a support frame 2 intended to be fixed to the load-bearing element, in which the opening A is obtained, and preferably comprising a rolling-shutter box 3 intended to be positioned above the opening A itself.
  • the rolling-shutter box 3 comprises a hollow tubular body, in particular obtained with an aluminum extrusion, which is extended with substantially horizontal axis between two opposite ends closed by two lateral caps in particular made of plastic material.
  • the blind 1 also comprises a take-up roller 4 rotatably constrained to the support frame 2, advantageously housed within the rolling-shutter box 3, and provided with a substantially horizontal rotation axis X.
  • a flexible fabric 5 is susceptible of being wound and unwound, which preferably passes through a lower slit of the rolling-shutter box 3.
  • the fabric 5 can be intended for attaining a darkening screen, e.g. in substitution of a rolling shutter, a brise-soleil screen for filtering sunlight or in the form of a mesh for making mosquito netting.
  • the fabric 5 has a preferably rectangular form and is provided, in a manner per se known to the man skilled in the art, with an upper edge fixed to the take-up roller and with a lower edge fixed to a bottom bar 6 arranged parallel to the take-up roller 4 and aimed to stretch the fabric 5.
  • the blind 1 also comprises two lateral guideways 7 extended parallel to one another and side-by-side each other, and between which the fabric 5 is susceptible of sliding following its winding and unwinding around the take-up roller 4.
  • each lateral guideway 7 is longitudinally extended according to a respective first extension direction Y, preferably vertical and substantially orthogonal to the rotation axis X of the take-up roller 4, between an upper end 8 thereof, arranged preferably at the rolling-shutter box 3, and an opposite lower end 9 intended to be arranged at the lower edge of the opening A, for example on a floor or on a window sill.
  • the two lateral guideways 7 are intended to be arranged along corresponding sides of the opening A and to be fixed to the load-bearing element (in which the opening A itself is made) for example by means of anchorage screws.
  • each lateral guideway 7 is preferably obtained by means of extruded metal sections, in particular made of aluminum, and is provided with a cross section with substantially "C" form.
  • each lateral guideway 7 is provided with an open side 10, arranged facing the open side 10 of the other lateral guideway 7, and on which a longitudinal slit 11 is made in which the bottom bar 6 is slidably constrained.
  • the bottom bar 6 of the blind 1, fixed to the lower edge of the fabric 5, is longitudinally extended along a second extension direction Z parallel to the rotation axis X of the take-up roller 4, between two lateral terminations 14 thereof that are slidably engaged with the respective lateral guideways 7.
  • the bottom bar 6 is internally hollow and preferably comprises a metallic section 6', e.g. made of extruded aluminum.
  • the lateral terminations 14 of the bottom bar 6 are preferably made of plastic material, they are placed to laterally close the metallic section 6' of the bottom bar 6 and they are fixed to the latter by means of connection screws, for example.
  • each lateral termination 14 of the bottom bar 6 is provided with an enlarged base portion 12, preferably fixed to the metallic section 6', and a connection portion 13 extended projectingly from the base portion 12 towards the corresponding lateral guideway 7 and slidably inserted in the longitudinal slit 11 of the latter.
  • the blind 1 also comprises movement means (not illustrated in the enclosed figures) mechanically connected to the take-up roller 4 and adapted to rotate the latter in order to move the fabric 5 between a collected position, in which the fabric 5 is wound around the take-up roller 4, and an extended position, in which the fabric 5 is unwound from the take-up roller 4 to at least partially close the opening A.
  • movement means (not illustrated in the enclosed figures) mechanically connected to the take-up roller 4 and adapted to rotate the latter in order to move the fabric 5 between a collected position, in which the fabric 5 is wound around the take-up roller 4, and an extended position, in which the fabric 5 is unwound from the take-up roller 4 to at least partially close the opening A.
  • the bottom bar 6 when the fabric 5 is in the collected position, the bottom bar 6 is preferably placed in abutment against the rolling-shutter box 3 and, when the fabric 5 is in the extended position, the bottom bar 6 is placed at the lower ends 9 of the lateral guideways 7 with the fabric 5 unwound to substantially totally close the opening A.
  • the fabric 5 is therefore completely guided in its winding and unwinding following the rotation of the take-up roller 4, with its lateral edges engaged in rails placed within the lateral guideways 7, and with the lower edge fixed to the bottom bar 6 in turn engaged in the lateral guideways 7 themselves.
  • the bottom bar 6, during the movement of the fabric 5, keeps the fabric 5 itself extended and it is moved, remaining horizontal, with its lateral terminations 14 engaged with the lateral guideways 7.
  • the aforesaid movement means comprise, in a per se entirely conventional manner, a motor (not illustrated) housed inside the take-up roller 4 advantageously at an end thereof.
  • a motor not illustrated
  • the movement means can also be of manual type, and for example obtained by means of an articulated drive rod, the motorized embodiment must be be intended as advantageous and absolutely preferable.
  • the blind 1 comprises two engagement elements 15 mounted on the bottom bar 6, each positioned at a respective lateral termination 14 of the bottom bar 6 itself.
  • each engagement element 15 comprises a slider 16 slidably constrained to the bottom bar 6 and movable according to the aforesaid second extension direction Z of the latter.
  • each slider 16 is slidably inserted in a through hole 17 of the corresponding lateral termination 14 of the bottom bar 6.
  • each slider 16 has elongated form extended along the second extension direction Z between a rear end, preferably arranged within the bottom bar 6, and a front end inserted in the longitudinal slit 11 of the corresponding lateral guideway 7.
  • the blind 1 comprises two locking elements 18, each of which is fixed to the corresponding lateral guideway 7 preferably in proximity to the lower end 9 of the latter, and is arranged for constraining the corresponding engagement element 15 when the fabric 5 is in extended position.
  • each locking element 18 comprises a support body 19 fixed to the corresponding lateral guideway 7 and preferably arranged within the latter.
  • Each locking element 18 also comprises a retention element 20 constrained to the corresponding support body 19 by means of a rotational-translation connection which allows one such retention element 20 to execute an operating rotational-translation travel between a non-interference position (illustrated in figure 8 ) and an interference position (illustrated in figure 9 ) in which the retention element 20 engages the engagement element 15 in order to retain the lateral termination 14 of the bottom bar 6 constrained to the corresponding locking element 18.
  • the support body 19 is provided with a cam guide profile 21, which is shaped in a manner such to guide the aforesaid operating rotational-translation travel of the retention element 20.
  • the latter comprises a follower portion 22 engaged with the guide profile 21 of the support body 19 and susceptible of following such guide profile 21 in a manner such to define the aforesaid operating rotational-translation travel of the retention element 20.
  • the follower portion 22 of the retention element 20 is configured in a manner such to be engaged, during the aforesaid operating travel, with specific sections of the guide profile 21 which cause at least one movement of the follower portion 22 (and hence of the retention element 20) having at least one rotation component and at least one translation component.
  • the retention element 20 also comprises an actuation portion 23 which, when the retention element 20 is in the non-interference position, is susceptible of interfering against the engagement element 15 (during the descent of the bottom bar 6) in order to force the retention element 20 to be moved towards the interference position according to the aforesaid operating rotational-translation travel.
  • the retention element 20 comprises a coupling portion 24 which, when the retention element 20 itself is in interference position, acts in abutment against the corresponding engagement element 15 in order to constrain the bottom bar 6 to the locking element 18 so as to maintain the fabric 5 taut in the extended position.
  • the retention element 20 of each locking element 18 comprises a rigid material body (e.g. plastic) which is shaped substantially with "C" form with two arms that define the aforesaid actuation 23 and coupling 24 portions.
  • the retention element 20 is preferably provided with two lateral faces 25 (parallel to the lying plane of the blind 1) from which two corresponding aforesaid follower portions 22 are projectingly extended.
  • the coupling portion 24 of the retention element 20 comprises an internal side 24', which abuts, preferably from above, against the engagement element 15 when the retention element 20 is in interference position, and an external side 24" directed opposite the internal side 24'.
  • the engagement element 15 is provided with an upper portion 50 against which the coupling portion 24 (in particular with its internal side 24') of the retention element 20 acts in abutment in interference position, so as to push the bottom bar 6 downward in order to retain the latter and maintain the fabric 5 taut in extended position.
  • each locking element 18 is advantageously provided with a seat 26 in which the corresponding retention element 20 is housed.
  • the support body 19 is provided with two lateral walls 27 (parallel to the lying plane of the blind 1) between which the aforesaid seat 26 is delimited.
  • each lateral wall 27 is provided with a corresponding aforesaid guide profile 21, with which the corresponding follower portion 22 of the retention element 20 is engaged.
  • the two lateral walls 27 are extended from a front side 19A of the support body 19, placed at the open side 10 of the corresponding lateral guideway 7, to an opposite rear side 19B preferably fixed to the bottom of the lateral guideway 7 itself.
  • the lateral walls 27 have, at the front side 19A, a longitudinal opening 28 in order to allow the passage of the engagement element 15 of the corresponding lateral termination 14, and, on the opposite rear side 19B they are connected to each other by a rear wall 29 suitably provided with a rear opening at the seat 26.
  • the support body 19 comprises two half-shells 19', 19", each of which defining a corresponding lateral wall 27 and a corresponding rear wall portion 29, at which they are connected together (e.g. by means of a connection screw).
  • the support body 19 is provided with a shaped path 30, along which the engagement element 15 slides when it encounters the locking element 18.
  • the engagement element 15 is provided with at least one guide portion 31 which is susceptible of being slidably engaged with the shaped path 30 of the support body 19.
  • the shaped path 30 is obtained with two tracks made on the internal faces of the two lateral walls 27 of the support body 19 and the guide portion 31 of the engagement element 15 is provided with two ends (extended in opposite directions) intended to be inserted in such tracks when the engagement element 15 encounters the locking element 18.
  • the guide portion 31 of the engagement element 15 is fixed to the slider 16 of the latter and for example comprises a rod-like body which is extended transversely to the second extension direction Z of the bottom bar 6 and transversely to the first extension direction Y of the lateral guideways 7.
  • the shaped path 30 is provided with an inlet section 32 provided with an introduction portion 33 adapted to intercept the guide portion 31 of the engagement element 15 following the descent movement of the bottom bar 6.
  • the shaped path 30 is also provided with a first tilted section 34 which is extended towards the rear side 19B of the support body 19, in a manner such to guide the guide portion 31 (and the corresponding slider 16) to slide along the second extension direction Z away from the center of the blind 1 (as indicated in the embodiment of figures 10a, 10b ).
  • the retention element 20 when the retention element 20 is in the non-interference position, its actuation portion 23 intercepts the shaped path 30 of the support body 19, in a manner such to intercept the engagement element 15, which consequently moves the actuation portion 23 in order to cause the operating travel of the retention element 20 from the non-interference position to the interference position (as illustrated in the embodiment of figures 11a, 11b ).
  • the coupling portion 24 of the retention element 20 In the non-interference position, the coupling portion 24 of the retention element 20 is outside the shaped path 30 so as to not obstruct the movement of the engagement element 15 and, hence, of the bottom bar 6, downward.
  • the coupling portion 24 of the retention element 20 intercepts the shaped path 30 in order to act on the engagement element 15, while preferably the actuation portion 23 is outside the shaped path 30.
  • the guide profile 21 of the support body 19 comprises a rotation section 35 provided at least with a curved segment and configured for causing at least one rotation (and in particular a rotation-translation) of the follower portion 22.
  • such rotation is caused by the action of the engagement element 15 against the actuation portion 23 of the retention element 20 during the descent of the bottom bar 6.
  • the coupling portion 24 of the retention element 20 is moved, up to intercepting the shaped path 30 of the support body 19 and abuts, in particular from above, against the engagement element 15.
  • the guide profile 21 of the support body 19 is provided with a translation section 36, which is extended (preferably starting from the rotation section 35) linearly according to a slide direction having at least one component parallel to the first extension direction Y of the lateral guideway 7 and, in particular, parallel to the latter.
  • Such translation section 36 guides the follower portion 22 of the retention element 20 to execute a translation movement along the aforesaid slide direction, in particular parallel to the first extension direction Y of the lateral guideway 7.
  • the aforesaid translation movement of the retention element 20 occurs after the rotation movement (caused by the rotation section 35 of the guide profile 21) and is directed downward, in a manner such that the coupling portion 24 of the retention element 20 acts on the engagement element 15 by pushing it downward, so as to lock the bottom bar 6 and maintain the fabric 5 taut (as in the embodiment of figures 13a, 13b ).
  • the translation section 36 of the guide profile 21 is placed at a height lower than the rotation section 35.
  • the follower portion 22 of the retention element 20 has elongated form (preferably rectilinear) between a first and a second end 22A, 22B, in particular rounded, connected by two sides 22C, preferably parallel to each other.
  • the rotation section 35 of the guide profile 21 of the support body 19 is extended, starting from the rear side 19B of the support body 19, with a first concave segment 37 directed downward, and then with a second concave segment 38 (having at least one curved portion) placed at a greater height and deeper than the first concave segment 37.
  • the rotation section 35 continues downward with a convex segment 39, preferably curved, and hence with a third concave segment 40 directed towards the rear side 19B of the support body 19.
  • a fourth concave segment 41 is provided, not as deep as the third 40, placed at a lower height than the latter and directed in part upward and in part towards the rear side 19B of the support body 19.
  • the translation section 36 of the guide profile 21 is extended, which is extended downward (preferably vertically) to a terminal portion 42 placed at the rear side 19B of the support body 19 and directed towards the first concave segment 37 of the rotation section 35.
  • each locking element 18 comprises tensioning means 43 acting against the corresponding retention element 20 in order to force, at least in the interference position, its coupling portion 24 against the engagement element 15, in particular with a force directed downward so as to maintain the fabric 5 of the blind 1 under tension when it is in extended position.
  • the tensioning means 43 comprise at least one elastic element 44 mechanically connected to the retention element 20 and loaded for moving the latter, at least in an actuation section TA of the operating travel of the retention element 20, towards the interference position.
  • the tensioning means 43 comprise two elastic elements 44, each passing along the corresponding lateral face 25 of the retention element 20.
  • each elastic element 44 for example obtained with a spring, comprises a first end 44' constrained to the retention element 20 and a second end 44" constrained to the support body 19.
  • the elastic element 44 is configured for exerting an elastic force FE on the retention element 20 at a specific point of application PA of the retention element 20, defined for example by a first point of constraint in which the first end 44' of the elastic element 44 is constrained to the retention element 20.
  • the point of application PA of the elastic force FE exerted by the elastic element 44 is moved between a positioning section TP, in which the elastic force FE is adapted to move the retention element 20 towards the non-interference position (as illustrated in the embodiment of figure 8 ), and the aforesaid actuation section TA of the operating travel, in which the elastic force FE is adapted to move the retention element 20 towards the interference position (as illustrated in the embodiment of figure 9 ).
  • the aforesaid elastic force FE determines a first moment on the retention element 20 able to rotate the latter towards the non-interference position, while when the point of application PA of the elastic force FE is in the actuation section of the operating travel, the elastic force FE determines a second moment on the retention element 20 (with sense opposite the first) able to rotate the retention element 20 towards the interference position.
  • the follower portion 22 of the retention element 20 when the follower portion 22 of the retention element 20 is engaged with the rotation section 35 of the guide profile 21, the follower portion 22 abuts against the rotation section 35 in at least one instantaneous engagement point, around which the rotary component of the movement of the retention element 20 occurs instant by instant.
  • engagement point of the rotation section 35 is susceptible of changing during the movement of the follower portion 22 on the guide profile 21.
  • the point of application PA of the elastic force FE exerted by the elastic element 44 is moved from one side to the other side of the aforesaid engagement point, in which such sides are defined by a line parallel to the first extension direction Y (in particular vertical) and passing through the engagement point.
  • the point of application PA is on a first side of the engagement point (in particular directed towards the rear side 19B of the support body 19) in a manner such that the elastic force FE determines the aforesaid first moment able to rotate the retention element 20 in a first rotation sense R1 towards the interference position.
  • the point of application PA is on a second side of said engagement point (in particular directed towards the front side 19A of the support body 19), opposite the first side, in a manner such that the elastic force FE determines the second moment able to rotate the retention element 20 in a second rotation sense R2, opposite the aforesaid first rotation sense R1, towards the non-interference position.
  • the corresponding arm of the elastic force FE is extended on such first side, determining the first moment which pushes the retention element 20 to rotate in the first rotation sense R1.
  • the corresponding arm of the elastic force FE is extended on such second side, determining the second moment which pushes the retention element 20 to rotate in the second rotation sense R2.
  • the point of passage between the positioning section TP and the actuation section TA of the operating travel is identified by the point of the operating travel vertically aligned with the instantaneous engagement point of the follower portion 22 on the guide profile 21.
  • the retention element 20 of each locking element 18 comprises an abutment portion 45 which, when the retention element 20 is in the non-interference position, is in abutment against an abutment portion 46 of the support body 19, so as to stop the retention element 20 in such position, in particular by blocking a further advancement thereof in the second rotation sense R2.
  • the support body 19 is provided with a guide track 48 which is extended starting from the abutment portion 46 and in which the constraining portion 45 is slidably inserted in order to allow the movement of the retention element 20 between the non-interference position and the interference position.
  • guide track 48 comprises a rectilinear section, parallel to the first extension direction Y of the corresponding lateral guideway 7, and a connection section, preferably curved, placed to connect between the abutment portion 46 and the aforesaid rectilinear section.
  • the first end 22A of the follower portion 22 abuts against the third concave segment 40 of the rotation section 35 of the guide profile 21.
  • the point of application PA of the retention element 20 is on the first side (on the left in the embodiment of figures 10a, 10b ) of the instantaneous engagement point of the first end 22A of the follower portion 22 on the rotation section 35 of the guide profile 21, in a manner such to force the retention element 20 to remain in the non-interference position (in particular pushing it in the second rotation sense R2 in abutment against the abutment portion 46 of the support body 19).
  • the engagement element 15 Following the descent of the bottom bar 6 downward (in order to unwind the fabric 5), the engagement element 15 enters into the shaped path 30 of the support body 19 and is guided (through its guide portion 31) to pass between the coupling portion 24 (without interfering with the latter) and the actuation portion 23 of the retention element 20 up to encountering such actuation portion 23.
  • the abutment of the engagement element 15 against the actuation portion 23 of the retention element 20 rotates the latter in the first rotation sense R1 (clockwise in figures 11a, 11b ), whose movement is guided by the sliding of the first end 22A of the follower portion 22 on the third concave segment 40 of the rotation section 35 of the guide profile 21 and by the abutment of the side 22C of the follower portion 22 against the convex segment 39 of the rotation section 35.
  • the action of the engagement element 15 determines a moment on the retention element 20 which overcomes the first moment determined by the elastic element 44, in a manner such to move the point of application PA from the positioning section TP of the operating travel to the actuation section TA, in which the elastic force FE, acting downward, drives the retention element 20 towards the interference position and downward.
  • the point of application PA is moved from the positioning section TP of the operating travel to the actuation section TP, passing from the first side (on the left in the enclosed figures) to the second side (on the right in the enclosed figures) of the instantaneous engagement point of the follower portion 22 on the guide profile 21. Consequently, the second moment generated by the elastic force FE also forces the retention element 20 to rotate in the first rotation sense R1 and subsequently downward as described hereinbelow.
  • the follower portion 22 of the retention element 20 enters into the translation section 36 of the guide profile 21 and slides with a side 22C thereof along such translation section 36 in a manner such to guide the translation movement of the retention element 20 downward, preferably parallel to the first extension direction Y of the lateral guideways 7.
  • the retention element 20 reaches the interference position, in which, following the force exerted by the elastic elements 44, it pushes the engagement element 15 (and hence the bottom bar 6) downward, maintaining the fabric 5 under tension in the extended position.
  • the support body 19 is provided with an end stop portion 52 which receives the retention element 20 (and in particular its coupling portion 24) in abutment, being opposed to the action of the elastic elements 44, in a manner such to block the descent of the retention element 20 in the interference position.
  • the engagement of the bottom bar 6 (in accordance with that described above) under tension can be obtained by setting a single end stop of the motor (which actuates the take-up roller 4) at a position in which the engagement element 15 intercepts the actuation portion 23 of the retention element 20, bringing the latter into the interference position.
  • the bottom bar 6 is pulled downward by the retention element 20, it is possible to maintain the bottom bar 6 very close to the base of the opening A, preventing the formation of wide slits and allowing the use of balloon-like gaskets of thin thickness on the bottom bar 6 itself.
  • the bottom bar 6 is actuated to be moved upward and, by acting in abutment against the actuation portion 24 of the retention element 20, it pushes the latter upward up to bringing the second end 22B of the follower portion 22 of the retention element 20 in abutment against the first concave segment 37 of the rotation section 35 of the guide profile 21 of the support body 19, as illustrated in the embodiment of figure 14 .
  • the engagement element 15 rotates the retention element 20 in the second rotation sense R2 (counter-clockwise in the embodiment of figure 15 ), moving the follower portion 22 up to bringing the first end 22A thereof in abutment against the third concave segment 40 of the rotation section 35 of the guide profile 21.
  • the ascending engagement element 15 rotates the retention element 20 in the second rotation sense R2 up to returning the point of application PA into the positioning section TP of the operating travel.
  • the elastic element 44 determines the first moment which forces the retention element 20 to rotate for an extra-travel of rotation in the second rotation sense R2 towards the non-interference position, in particular up to bringing the abutment portion 45 of the retention element 20 against the abutment portion 46 of the support body 19.
  • the upper portion 50 of the engagement element 15 is on the front part provided with a flared section 50' which, abutting against the internal side 24' of the coupling portion 24 of the retention element 20, causes the rotation of the latter and simultaneously allows the re-ascending of the engagement element 15 along the first tilted section 34 of the shaped path 30.
  • the external side 24" of the coupling portion 24 in particular directed towards the front side 19A of the support body 19, delimits a bypass section 49 in the shaped path 30 of width such to be traversed by the engagement element 15 in order to allow the latter to be positioned below the coupling portion 24 of the retention element 20.
  • the aforesaid bypass channel 49 allows a user to force the descent of the bottom bar 6 up to bringing the engagement element 15 below the coupling portion 24 of the retention element 20, without risking damage of any component of the blind 1.
  • the user by acting for example with a foot on the bottom bar 6, can push the engagement element 15 to continue to descend along the shaped path 30 of the support body 19, passing through the bypass section 49, as illustrated in figures 17b-17d .
  • the shaped path 30 is provided, below the aforesaid bypass section 49, with a second tilted section 51 which is extended towards the rear side 19B of the support body 19 in a manner so as to guide the guide portion 31 (and the corresponding slider 16) of the engagement element 15 to slide along the second extension direction Z in order to bring the latter below the coupling portion 24 of the retention element 20.

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Operating, Guiding And Securing Of Roll- Type Closing Members (AREA)
  • Blinds (AREA)
  • Tents Or Canopies (AREA)

Claims (10)

  1. Geweberollo (1), das Folgendes umfasst:
    - einen Tragrahmen (2), der dazu bestimmt ist, an einem lasttragenden Element mit einer darin eingerichteten Öffnung (A) befestigt zu werden;
    - eine Aufnahmerolle (4), die drehbar an dem genannten Tragrahmen (2) befestigt ist, im Wesentlichen eine horizontal Drehachse (X) aufweist und dazu bestimmt ist, über der genannten Öffnung (A) positioniert zu werden;
    - zwei seitliche Führungen (7), die parallel zu einander und nebeneinander entlang entsprechender erster Verlaufsrichtungen (Y) im Wesentlichen orthogonal zu der Drehachse (X) der genannten Aufnahmerolle (4) verlaufen und dazu bestimmt sind, entlang entsprechender Seiten der genannten Öffnung (A) angeordnet zu werden;
    - ein Gewebe (5), das zwischen einer an der genannten Aufnahmerolle (4) befestigten oberen Kante und einer unteren Kante verläuft und geeignet ist, zwischen den genannten seitlichen Führungen (7) zu gleiten;
    - eine untere Stange (6), die an der unteren Kante des genannten Gewebes (5) befestigt ist und entlang einer zweiten Verlaufsrichtung (Z) parallel zu der Drehachse (X) der genannten Aufnahmerolle (4) zwischen zwei seitlichen Enden (14) derselben verläuft, die sich mit den entsprechenden seitlichen Führungen (7) gleitend im Eingriff befinden;
    - Bewegungsmittel, die mechanisch mit der genannten Aufnahmerolle (4) verbunden und geeignet sind, die genannte Aufnahmerolle (4) zu drehen, um das genannte Gewebe (5) zwischen einer Ausgangsposition, in der das genannte Gewebe (5) um die genannte Aufnahmerolle (4) gewickelt ist, und einer ausgebreiteten Position, in der das genannte Gewebe (5) mindestens teilweise von der genannten Aufnahmerolle (4) abgewickelt und zwischen den beiden seitlichen Führungen (7) ausgebreitet ist, um die genannte Öffnung (A) zumindest teilweise zu überdecken, zu bewegen;
    - zwei Eingriffselemente (15), die auf der genannten unteren Stange (6) montiert und beide an dem entsprechenden seitlichen Ende (14) positioniert sind;
    - zwei Verriegelungselemente (18), von denen jedes an einer entsprechenden genannten seitlichen Führung (7) befestigt und so angeordnet ist, dass es ein entsprechendes genanntes Eingriffselement (15) befestigt, wenn das genannte Gewebe (5) sich in der genannten ausgebreiteten Position befindet;
    wobei jedes der genannten Verriegelungselemente (18) Folgendes umfasst:
    - einen Stützkörper (19);
    - ein Rückhalteelement (20), das an dem genannten Stützkörper (19) zwischen einer nicht-interferierenden Position und einer interferierenden Position beweglich befestigt ist, und einen Kupplungsabschnitt (24) umfasst, der, wenn das genannte Rückhalteelement (20) sich in der genannten interferierenden Position befindet, anschlagend gegen das genannte Eingriffselement (15) wirkt, um das entsprechende seitliche Ende (14) der genannten unteren Stange (6) an dem genannten Verriegelungselement (18) zu befestigen;
    wobei das genannte Geweberollo (1) dadurch gekennzeichnet ist, dass:
    - der genannte Stützkörper (19) mit einem Nockenführungsprofil (21) ausgestattet ist;
    - das genannte Rückhalteelement (20) Folgendes umfasst:
    - einen Nockenstößelabschnitt (22), der sich in dem genannten Nockenführungsprofil (21) im Eingriff befindet, der mindestens einen operativen Drehverschiebungsarbeitshub des genannten Rückhalteelements (20) zwischen der genannten nicht-interferierenden Position und der genannten interferierenden Position definiert;
    - einen Betätigungsabschnitt (23), der, wenn das genannte Rückhalteelement (20) sich in der genannten nicht-interferierenden Position befindet, geeignet ist, mit dem genannten Eingriffselement (15) zu interferieren, um das genannte Rückhalteelement (20) zu zwingen, sich entsprechend des genannten Drehverschiebungsarbeitshubs in Richtung der genannten interferierenden Position zu bewegen.
  2. Geweberollo (1) nach Anspruch 1, dadurch gekennzeichnet, dass jedes der genannten Verriegelungselemente (18) gegen das genannte Rückhalteelement wirkende Spannmittel (43) umfasst, um, zumindest in der genannten interferierenden Position, den genannten Kupplungsabschnitt (24) gegen das genannte Eingriffselement (15) zu treiben.
  3. Geweberollo (1) nach Anspruch 2, dadurch gekennzeichnet, dass die genannten Spannmittel (43) mindestens ein mechanisch mit dem genannten Rückhalteelement (20) verbundenes Federelement (44) umfassen, das gespannt ist, um mindestens in einem Betätigungsabschnitt (TA) des genannten Arbeitshubs das genannte Rückhalteelement (20) in Richtung der genannten interferierenden Position zu bewegen.
  4. Geweberollo (1) nach Anspruch 3, dadurch gekennzeichnet, dass das genannte mindestens eine Federelement (44) darauf ausgelegt ist, auf das genannte Rückhalteelement (20) eine Federkraft (FE) an einem Applikationspunkt (PA) des genannten Rückhalteelements (20) auszuüben und dieser Applikationspunkt (PA) beweglich ist und dem genannten Arbeitshub zwischen dem genannten Betätigungsabschnitt (TA) des genannten Arbeitshubs, in der die genannte Federkraft (FE) in der Lage ist, das genannte Rückhalteelement (20) in Richtung der genannten interferierenden Position zu bewegen, und einem Positionierungsabschnitt (TP) des genannten Arbeitshubs, in dem die Federkraft (FE) in der Lage ist, das genannte Rückhalteelement (20) in Richtung der nicht-interferierenden Position zu bewegen, bewegt werden kann.
  5. Geweberollo (1) nach einem beliebigen der vorangegangenen Ansprüche, dadurch gekennzeichnet, dass das genannte Nockenführungsprofil (21) Folgendes umfasst:
    - einen Drehabschnitt (35), der mindestens mit einem gekrümmten Segment ausgestattet und darauf ausgelegt ist, mindestens eine Drehung des genannten Nockenstößelabschnitts (22) herbeizuführen;
    - einen Versetzungsabschnitt (36), der linear gemäß einer Gleitrichtung verläuft, die mindestens eine Komponente parallel zu der genannten ersten Verlaufsrichtung (Y) aufweist, um mindestens ein Gleiten des genannten Nockenstößelabschnitts (22) entlang der genannten Gleitrichtung herbeizuführen.
  6. Geweberollo (1) nach den Ansprüchen 4 und 5, dadurch gekennzeichnet, dass der genannte Nockenstößelabschnitt (22) geeignet ist, mit dem Drehabschnitt (35) des genannten Nockenführungsprofils (21) in mindestens einem momentanen Eingriffspunkt des genannten Drehabschnitts (35) in Eingriff gebracht zu werden; wobei der genannte Applikationspunkt (PA) in dem genannten Antriebsabschnitt (TA) an einer ersten Seite des genannten momentanen Eingriffspunkts positioniert ist, so dass die genannte Federkraft (FE) ein erstes Moment bedingt, das geeignet ist, das genannte Rückhalteelement (20) in einer ersten Drehrichtung (R1) in Richtung der genannten interferierenden Position zu drehen;
    wobei der genannte Applikationspunkt (PA) in dem genannten Positionierungsabschnitt (TP) an einer zweiten Seite des genannten momentanen Eingriffspunkts gegenüber der ersten Seite positioniert ist, so dass die genannte Federkraft (FE) ein zweites Moment bedingt, das geeignet ist, das genannte Rückhalteelement (20) in einer zweiten Drehrichtung (R2) entgegengesetzt zu der ersten Drehrichtung (R1) in Richtung der genannten nicht-interferierenden Position zu drehen;
  7. Geweberollo (1) nach Anspruch 5 oder 6, dadurch gekennzeichnet, dass der genannte Verschiebungsabschnitt (36) auf einer geringeren Höhe als der genannte Drehabschnitt (35) platziert ist.
  8. Geweberollo (1) nach einem beliebigen der vorangegangenen Ansprüche 5 bis 7, dadurch gekennzeichnet, dass die Gleitrichtung des genannten Verschiebungsabschnitts (36) im Wesentlichen parallel zu der ersten Verlaufsrichtung (Y) ist.
  9. Geweberollo (1) nach einem beliebigen der vorangegangenen Ansprüche, dadurch gekennzeichnet, dass das genannte Eingriffselement (15) mit einem oberen Teil (50) ausgestattet ist, gegen den der Kupplungsabschnitt (24) des genannten Rückhalteelements (20) in der genannten interferierenden Position anschlägt, um die genannte untere Stange (6) nach unten zu drücken.
  10. Geweberollo (1) nach einem beliebigen der vorangegangenen Ansprüche, dadurch gekennzeichnet, dass der genannte Stützkörper (19) mit einer profilierten Bahn (30) ausgestattet ist, in der das genannte Eingriffselement (15) geeignet ist, zu verlaufen;
    wobei der Kupplungsabschnitt (24) des genannten Rückhalteelements (20) mit einer Außenseite (24") ausgestattet ist, die in der genannten interferierenden Position einen Umgehungsabschnitt (49) der genannten profilierten Bahn (30) begrenzt, der es durch seine Breite gestattet, von dem genannten Eingriffselement (15) überquert zu werden, um es dem genannten Eingriffselement (15) zu gestatten, unter dem Kupplungsabschnitt (24) des genannten Rückhalteelements (20) positioniert zu werden.
EP19202076.6A 2018-10-08 2019-10-08 Geweberollo Active EP3636872B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102018000009261A IT201800009261A1 (it) 2018-10-08 2018-10-08 Tenda con telo avvolgibile

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Publication Number Publication Date
EP3636872A1 EP3636872A1 (de) 2020-04-15
EP3636872B1 true EP3636872B1 (de) 2021-09-01

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EP (1) EP3636872B1 (de)
IT (1) IT201800009261A1 (de)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3000958B1 (de) * 2014-09-24 2017-05-17 Palagina S.r.l. Stoffrollo
ITUB20156296A1 (it) * 2015-12-04 2017-06-04 Gibus Spa Tenda ad avvolgimento

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IT201800009261A1 (it) 2020-04-08
EP3636872A1 (de) 2020-04-15

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