EP2540950B1 - A roller shutter - Google Patents
A roller shutter Download PDFInfo
- Publication number
- EP2540950B1 EP2540950B1 EP12004286.6A EP12004286A EP2540950B1 EP 2540950 B1 EP2540950 B1 EP 2540950B1 EP 12004286 A EP12004286 A EP 12004286A EP 2540950 B1 EP2540950 B1 EP 2540950B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- couplers
- cylindrical
- elongated
- laths
- recesses
- 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
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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
- E06B9/02—Shutters, movable grilles, or other safety closing devices, e.g. against burglary
- E06B9/08—Roll-type closures
- E06B9/11—Roller shutters
- E06B9/15—Roller shutters with closing members formed of slats or the like
-
- 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
- E06B9/08—Roll-type closures
- E06B9/11—Roller shutters
- E06B9/15—Roller shutters with closing members formed of slats or the like
- E06B2009/1533—Slat connections
- E06B2009/155—Slats connected by separate elements
- E06B2009/1555—Flexible elements, e.g. tapes, strips, cords or chains
Definitions
- the present invention relates to a roller shutter, in particular for covering window and/or doors openings, comprising side guides, in which a shutter comprising a number of elongated, profiled laths is slidably disposed.
- roller shutters are known from the state of art that comprise rigid, profiled laths hinged together along their longitudinal edges directly (an appropriate projection at the first longitudinal edge of the profile of the lath cooperates with an appropriate recess at the second longitudinal edge of the profile of the neighbouring lath) or by means of elastic, elongated couplers made of a homogenous, usually elastomeric material and disposed in elongated, usually of the same shape, recesses at the edges of the laths. While the shutter is rolled in and out it is usually subjected to tensile forces acting perpendicularly to the longitudinal axes of the laths.
- Rollers having shutters with laths connected with each other directly are prone to wear due to friction between cooperating laths during rolling a shutter in and out. Furthermore, an action of these friction forces requires a higher force in order to roll a shutter in or out. Rollers of this kind are also noisier in operation.
- rollers having shutters with laths connected with each other by elastic couplers are prone to fall apart since tensile forces acting on the couplers lead to their deformation, and in turn to slide the coupling parts thereof out of elongated recesses at the edges of laths. Furthermore, due to the friction between an elastomeric coupler and a rigid recess of a lath, sliding such couplers inside the recesses may impede assembling the roller.
- UK patent specification GB 2 113 749 A filed January 7, 1982 discloses a roller shutter assembly comprising at least three elongated laths, hinged together along their longitudinal edges, and resilient loading means which urge the shutter towards an opening position, so that each hinge is subjected to a tensile load which tends to separate the two laths it hinges together.
- Each hinge comprises an elongated strip of resilient material having enlarged formations along its longitudinal edges, the enlarged formations of each strip being received and retained within longitudinally extending recesses which are formed by respective longitudinal edges of the laths that are hinged together by that strip.
- Each recess has a longitudinally extending mouth through which the strip extends, the mouth being narrower than both the interior of the recess and the enlarged formation along the longitudinal edge of the strip that is located therein, and the mass of the resilient material of that formation and the configuration of that formation being such that it cannot be squeezed through the mouth during normal usage of the shutter.
- the roller shutter of such a construction blocks rotation of a lath with respect to the strip, which lead to the strip deformation while the shutter is rolled in or out.
- the invention provides a roller shutter, in particular for covering window and/or doors openings, comprising side guides, in which a shutter is slidably disposed, said shutter comprising a number of elongated, profiled laths connected together by means of elastic, elongated couplers, wherein laths are provided at their elongated edges with cylindrical, elongated recesses with mouths, the width of which is smaller than diameter of the recesses, and said elongated couplers comprise cylindrical, elongated parts, disposed in cylindrical recesses of the laths they connect, and elongated connecting parts the width of which is smaller than the diameter of the cylindrical part and smaller than the width of the mouth.
- said cylindrical parts of the couplers are made of material having the Shore hardness exceeding by at least 50° ShA the Shore hardness of said connecting parts of the couplers, and said couplers are formed in a coextrusion process.
- shapes of the cylindrical parts of the couplers reduce friction while the shutter is rolled over the rolling shaft and the couplers may rotate in a certain range in the recess of the laths.
- said cylindrical parts of the couplers are formed from thermoplastic elastomer (TPE), preferably from thermoplastic polyamide elastomer (TPA), and more preferably from Tefabloc® elastomer, such as "Tefabloc® TO .. 138", and said connecting parts of the couplers are formed from thermoplastic elastomer (TPE), preferably from TPV elastomer, and more preferably from SantopreneTM material, such as "SantopreneTM 111-45".
- TPE thermoplastic elastomer
- TPE thermoplastic polyamide elastomer
- Tefabloc® elastomer such as "Tefabloc® TO .. 138”
- TPE thermoplastic elastomer
- SantopreneTM material such as "SantopreneTM 111-45".
- the ratio of the width of the mouth to the diameter of the cylindrical recesses is in the range of 0.3 to 0.7, while the ratio of the width of the elongated coupling part to the width of the mouth of the cylindrical recesses is in the range of 0.5 to 0.8.
- Cylindrical parts of the elastic couplers may also be additionally reinforced with cores embodied in the material of the couplers during coextrusion of the couplers.
- a roller shutter 1 shown in Fig. 1 and Fig. 2 comprises a case 2 attached to two side guides 31 connected with a cross beam 32.
- a shutter 4 is slidably disposed in side guides 31 and may be rolled over a shaft 21 rotationally disposed inside the case 2 and driven by an electric drive system (not shown).
- Side guides 31 have elongated channels inside of which the edges of the shutter 4 slide while the roller is being rolled in or out.
- the shutter 4 comprises a number of profiled laths 41 connected together by means of elastic, elongated couplers 42 disposed in recesses of the laths 41.
- Laths 41 have a form of substantially rectangular plates made of aluminium and bend archwise to the outside of the shutter. At the inside (or with reference to the drawing - at the bottom) side of the roller shutter, elongated edges of the laths 41 are provided with cylindrical elongated recesses 412 with elongated mouths 413.
- Each coupler 42 is a uniform, coextruded element and comprises an elongated flat connecting part 421 joined with two elongated cylindrical parts 422.
- diameters (d) of the cylindrical parts 422 of the couplers 42 are close to diameters (D) of the cylindrical recesses 412 of the laths 41 which enables to slide the parts 422 inside the recesses 412 in order to connect adjoining laths 41.
- the width (S) of the mouth 413 of the recesses 412 is at the same time smaller than the diameter (D) of the cylindrical recesses 412, in order to improve durability of connection with elastic couplers 42 while the shutter 4 is subjected to tensile forces acting perpendicularly to the longitudinal axes of the laths 41.
- Width (s) of the connecting part 421 is at the same time slightly smaller than the width (S) of the mouth 413, so that cylindrical parts 422 of the couplers 42 may rotate (in a certain range) in recesses 412 of the laths 41 with no deformation of the connecting parts 421, as shown in Fig. 4a and Fig. 4b .
- the connecting parts 421 of the couplers 42 are formed from “SantopreneTM 111-45" elastomer, and cylindrical parts 422 of the couplers 42 are formed from thermoplastic elastomer "Tefabloc® TO .. 138".
- a single extrusion head has been used having a shape corresponding to the shape of the profile of the coupler, to which the materials have been delivered from three extruders, where external extruders delivered elastomer for cylindrical fragments 422, while internal extruder delivered elastomer for connecting part 421, leading to mixing these elastomers at the boundaries of their distributions.
- Hardness of connecting parts 421 in a Shore scale amounts about 45° ShA (Shore Durometer Type A), while hardness of the cylindrical parts 422 of the couplers 42 amounts about 90° ShA (about 40° ShD for Shore durometer Type D).
- Fig. 4 illustrates a cross-section of the shutter 4 for three axial positions between adjoining laths 41l and 41 r, wherein local coordinate systems 51 and 52 have been assigned to elements that rotate during rolling the shutter 4 (laths 41 and cylindrical parts 422).
- the shutter 4 is in an unrolled position, so that coordinate systems 51l, 52l, 52r and 51 r are parallel to each other.
- Fig. 4b illustrates a situation, in which the lath 41 r has been rotated with respect to the lath 41l until the bottom surface of the connecting part 421 abutted on the bottom edges of the mouths 413 of the cylindrical recesses 412 of the laths 41l and 41 r. In this position the connecting part 421 has not yet been deformed. As shown, each cylindrical part 422l and 422r is rotated by some angle ⁇ , wherein the angle of rotation of the lath 41 r with respect to the lath 41l is obviously a sum of these rotations and amounts 2 ⁇ ( ⁇ + ⁇ ).
- Fig. 5 illustrates another embodiment of the roller shutter according to the present invention, where profiles of the laths 41 a are wider and cylindrical parts 422a of the couplers 42a are additionally reinforced with steel cores 423 that have been embodied in the material (Tefabloc® TO 138) of the couplers 42a during coextrusion thereof.
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Operating, Guiding And Securing Of Roll- Type Closing Members (AREA)
Description
- The present invention relates to a roller shutter, in particular for covering window and/or doors openings, comprising side guides, in which a shutter comprising a number of elongated, profiled laths is slidably disposed.
- Various roller shutters are known from the state of art that comprise rigid, profiled laths hinged together along their longitudinal edges directly (an appropriate projection at the first longitudinal edge of the profile of the lath cooperates with an appropriate recess at the second longitudinal edge of the profile of the neighbouring lath) or by means of elastic, elongated couplers made of a homogenous, usually elastomeric material and disposed in elongated, usually of the same shape, recesses at the edges of the laths. While the shutter is rolled in and out it is usually subjected to tensile forces acting perpendicularly to the longitudinal axes of the laths.
- Rollers having shutters with laths connected with each other directly are prone to wear due to friction between cooperating laths during rolling a shutter in and out. Furthermore, an action of these friction forces requires a higher force in order to roll a shutter in or out. Rollers of this kind are also noisier in operation.
- On the other hand, rollers having shutters with laths connected with each other by elastic couplers are prone to fall apart since tensile forces acting on the couplers lead to their deformation, and in turn to slide the coupling parts thereof out of elongated recesses at the edges of laths. Furthermore, due to the friction between an elastomeric coupler and a rigid recess of a lath, sliding such couplers inside the recesses may impede assembling the roller.
- In order to solve the first of the aforementioned problems,
UK patent specification GB 2 113 749 A filed January 7, 1982 - Each hinge comprises an elongated strip of resilient material having enlarged formations along its longitudinal edges, the enlarged formations of each strip being received and retained within longitudinally extending recesses which are formed by respective longitudinal edges of the laths that are hinged together by that strip. Each recess has a longitudinally extending mouth through which the strip extends, the mouth being narrower than both the interior of the recess and the enlarged formation along the longitudinal edge of the strip that is located therein, and the mass of the resilient material of that formation and the configuration of that formation being such that it cannot be squeezed through the mouth during normal usage of the shutter. However, the roller shutter of such a construction blocks rotation of a lath with respect to the strip, which lead to the strip deformation while the shutter is rolled in or out.
- Known improvement of this construction involves making the recesses in the laths of the shutter in a cylindrical shape. Such cylindrical recesses cooperating with cylindrical edge parts of elastic couplers provides an additional degree of freedom of a hinged connection between a lath and a coupler that may therefore, to a certain extent, rotate before undergoing deformation.
- It has been an object of the present invention to provide a roller alleviating the aforementioned drawbacks, which would feature improved functional properties and durability and which would be easier to assembly.
- The invention provides a roller shutter, in particular for covering window and/or doors openings, comprising side guides, in which a shutter is slidably disposed, said shutter comprising a number of elongated, profiled laths connected together by means of elastic, elongated couplers, wherein laths are provided at their elongated edges with cylindrical, elongated recesses with mouths, the width of which is smaller than diameter of the recesses, and said elongated couplers comprise cylindrical, elongated parts, disposed in cylindrical recesses of the laths they connect, and elongated connecting parts the width of which is smaller than the diameter of the cylindrical part and smaller than the width of the mouth. According to the invention said cylindrical parts of the couplers are made of material having the Shore hardness exceeding by at least 50° ShA the Shore hardness of said connecting parts of the couplers, and said couplers are formed in a coextrusion process.
- Provision of a coextruded coupler in which cylindrical parts are harder than connecting parts limits deformation of the cylindrical parts in recesses of the laths while the shutter undergoes tensile forces. Therefore durability of the shutter is increased as compared to shutters known form the state of art made of only one type of elastic material.
- Furthermore, harder cylindrical parts of the coupler are easier to slide inside and along the recesses of the laths. This sliding movement is also easier due to increased longitudinal stiffness of the coupler.
- Furthermore, shapes of the cylindrical parts of the couplers reduce friction while the shutter is rolled over the rolling shaft and the couplers may rotate in a certain range in the recess of the laths.
- Preferably said cylindrical parts of the couplers are formed from thermoplastic elastomer (TPE), preferably from thermoplastic polyamide elastomer (TPA), and more preferably from Tefabloc® elastomer, such as "Tefabloc® TO .. 138", and said connecting parts of the couplers are formed from thermoplastic elastomer (TPE), preferably from TPV elastomer, and more preferably from Santoprene™ material, such as "Santoprene™ 111-45".
- Preferably the ratio of the width of the mouth to the diameter of the cylindrical recesses is in the range of 0.3 to 0.7, while the ratio of the width of the elongated coupling part to the width of the mouth of the cylindrical recesses is in the range of 0.5 to 0.8.
- Cylindrical parts of the elastic couplers may also be additionally reinforced with cores embodied in the material of the couplers during coextrusion of the couplers.
- The invention is presented below in exemplary embodiment and in connection with the attached drawings on which:
-
Fig. 1 is a schematic perspective view of a roller shutter according to the present invention configured to serve as a roof roller shutter; -
Fig. 2 is a cross-sectional view of the roller shutter along the line A-A ofFig. 1 , -
Fig. 3 is a cross-sectional, perspective view of the shutter shown inFig. 1 , -
Fig. 4 illustrates the shutter of the roller shutter in three distinct axial positions between adjoining laths of the shutter, and -
Fig. 5 shows another embodiment of a shutter of a roller shutter according to the invention. - A
roller shutter 1 shown inFig. 1 and Fig. 2 comprises acase 2 attached to twoside guides 31 connected with across beam 32. Ashutter 4 is slidably disposed inside guides 31 and may be rolled over ashaft 21 rotationally disposed inside thecase 2 and driven by an electric drive system (not shown).Side guides 31 have elongated channels inside of which the edges of theshutter 4 slide while the roller is being rolled in or out. Theshutter 4 comprises a number of profiledlaths 41 connected together by means of elastic,elongated couplers 42 disposed in recesses of thelaths 41. - Details of construction of the
shutter 4 are shown inFig. 3 .Laths 41 have a form of substantially rectangular plates made of aluminium and bend archwise to the outside of the shutter. At the inside (or with reference to the drawing - at the bottom) side of the roller shutter, elongated edges of thelaths 41 are provided with cylindricalelongated recesses 412 withelongated mouths 413. -
Laths 41 are connected together by means ofelongated couplers 42. Eachcoupler 42 is a uniform, coextruded element and comprises an elongated flat connectingpart 421 joined with two elongatedcylindrical parts 422. - As shown in
Fig. 3 , diameters (d) of thecylindrical parts 422 of thecouplers 42 are close to diameters (D) of thecylindrical recesses 412 of thelaths 41 which enables to slide theparts 422 inside therecesses 412 in order to connect adjoininglaths 41. The width (S) of themouth 413 of therecesses 412 is at the same time smaller than the diameter (D) of thecylindrical recesses 412, in order to improve durability of connection withelastic couplers 42 while theshutter 4 is subjected to tensile forces acting perpendicularly to the longitudinal axes of thelaths 41. Width (s) of the connectingpart 421 is at the same time slightly smaller than the width (S) of themouth 413, so thatcylindrical parts 422 of thecouplers 42 may rotate (in a certain range) inrecesses 412 of thelaths 41 with no deformation of the connectingparts 421, as shown inFig. 4a and Fig. 4b . - In order to further improve durability of connection of the
shutter 4, the connectingparts 421 of thecouplers 42 are formed from "Santoprene™ 111-45" elastomer, andcylindrical parts 422 of thecouplers 42 are formed from thermoplastic elastomer "Tefabloc® TO .. 138". To manufacturecouplers 42 in a coextrusion process, a single extrusion head has been used having a shape corresponding to the shape of the profile of the coupler, to which the materials have been delivered from three extruders, where external extruders delivered elastomer forcylindrical fragments 422, while internal extruder delivered elastomer for connectingpart 421, leading to mixing these elastomers at the boundaries of their distributions. - Hardness of connecting
parts 421 in a Shore scale amounts about 45° ShA (Shore Durometer Type A), while hardness of thecylindrical parts 422 of thecouplers 42 amounts about 90° ShA (about 40° ShD for Shore durometer Type D). -
Fig. 4 illustrates a cross-section of theshutter 4 for three axial positions betweenadjoining laths 41l and 41 r, wherein local coordinate systems 51 and 52 have been assigned to elements that rotate during rolling the shutter 4 (laths 41 and cylindrical parts 422). - As shown in
Fig. 4a , theshutter 4 is in an unrolled position, so thatcoordinate systems -
Fig. 4b illustrates a situation, in which thelath 41 r has been rotated with respect to the lath 41l until the bottom surface of the connectingpart 421 abutted on the bottom edges of themouths 413 of thecylindrical recesses 412 of thelaths 41l and 41 r. In this position the connectingpart 421 has not yet been deformed. As shown, eachcylindrical part 422l and 422r is rotated by some angle α, wherein the angle of rotation of thelath 41 r with respect to the lath 41l is obviously a sum of these rotations and amounts 2α (α + α). - As illustrated in
Fig 4c , further rotation of thelath 41 r leads to an elastic deformation of the connectingpart 421 that enables further rotation of thelath 41 r by some angle ß. Therefore, the total angle of rotation of thelath 41 r amounts 2α + ß. -
Fig. 5 illustrates another embodiment of the roller shutter according to the present invention, where profiles of thelaths 41 a are wider andcylindrical parts 422a of thecouplers 42a are additionally reinforced withsteel cores 423 that have been embodied in the material (Tefabloc® TO 138) of thecouplers 42a during coextrusion thereof. - The above embodiments of the present invention are merely exemplary. The figures are not necessarily to scale, and some features may be exaggerated or minimized.
Claims (5)
- A roller shutter (1), in particular for covering window and/or doors openings, comprising side guides (31), in which a shutter (4) is slidably disposed, said shutter (4) comprising a number of elongated, profiled substantially rigid laths (41) connected together by means of elastic, elongated couplers (42), wherein laths (41) are provided at their elongated edges with cylindrical, elongated recesses (412) with mouths (413), the width (S) of which is smaller than diameter (D) of the recesses (412), and said elongated couplers (42) comprise cylindrical, elongated parts (422), disposed in cylindrical recesses (412) of the laths (41) they connect, and elongated connecting parts (421) the width (s) of which is smaller than diameter (d) of the cylindrical part (422) and smaller than the width (S) of the mouth (413), characterised in that said cylindrical parts (422) of the couplers (42) are made of material having the Shore hardness exceeding by at least 50° ShA the Shore hardness of said connecting parts (421) of the couplers (42), and said couplers (42) are formed in a coextrusion process, and the cylindrical parts (422) of the couplers (42) may rotate in a certain range in recesses (412) of the laths (41) before deformation of said connecting parts (421).
- The roller shutter according to Claim 1, characterised in that said cylindrical parts (422) of the couplers (42) are formed from thermoplastic elastomer (TPE), preferably from thermoplastic polyamide elastomer (TPA), and more preferably from Tefabloc® elastomer, such as "Tefabloc® TO .. 138", and said connecting parts (421) of the couplers (42) are formed from thermoplastic elastomer (TPE), preferably from TPV elastomer, and more preferably from Santoprene™ material, such as "Santoprene™ 111-45".
- The roller shutter according to Claim 1 or 2, characterised in that the ratio of the width (S) of the mouth (413) to the diameter (D) of the cylindrical recesses (412) is in the range of 0.3 to 0.7.
- The roller shutter according to Claim 1 or 2 or 3, characterised in that the ratio of the width (s) of the elongated coupling part (421) to the width (S) of the mouth (413) of the cylindrical recesses (412) is in the range of 0.5 to 0.8.
- The roller shutter according to Claim 1 or 2 or 3 or 4, characterised in that the cylindrical parts (422a) of the elastic couplers (42a) are additionally reinforced with cores (423) embodied in the material of the couplers (42a) during coextrusion of the couplers (42a).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL395446A PL226047B1 (en) | 2011-06-27 | 2011-06-27 | Roll-up blind |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2540950A1 EP2540950A1 (en) | 2013-01-02 |
EP2540950B1 true EP2540950B1 (en) | 2016-08-24 |
Family
ID=46317099
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12004286.6A Active EP2540950B1 (en) | 2011-06-27 | 2012-06-05 | A roller shutter |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP2540950B1 (en) |
PL (1) | PL226047B1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110513021A (en) * | 2019-10-04 | 2019-11-29 | 天长市金铝消防设备有限公司 | A kind of curtain plate of rolling screen door |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2113749B (en) | 1982-01-07 | 1985-09-11 | Angus Sacol Ladders Ltd | Roller shutter |
DE19653842A1 (en) * | 1996-12-21 | 1998-06-25 | Giovanni Miranda | Roll shutter and manufacturing process |
GB2321489B (en) * | 1997-01-28 | 2001-08-22 | Mark Richard Curtis | A weatherproof roller shutter for roofs |
DE10327537B3 (en) * | 2003-06-18 | 2005-03-10 | Hennig Holding Gmbh | Articulated track, in particular for machine tools |
DE102006028487B8 (en) * | 2006-06-21 | 2008-06-26 | Inoutic / Deceuninck Gmbh | Roller curtain |
-
2011
- 2011-06-27 PL PL395446A patent/PL226047B1/en unknown
-
2012
- 2012-06-05 EP EP12004286.6A patent/EP2540950B1/en active Active
Also Published As
Publication number | Publication date |
---|---|
EP2540950A1 (en) | 2013-01-02 |
PL226047B1 (en) | 2017-06-30 |
PL395446A1 (en) | 2013-01-07 |
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