FR2917114A1 - ACOUSTIC BLADE ROLLING SHUTTER. - Google Patents

Abstract

Roller shutter for closing an opening (100), comprising: - an apron (1), formed of longitudinal blades (L) articulated laterally to each other along their longitudinal edges, able to be displaced substantially parallel to the opening , and comprising a longitudinal end blade (L '), - an upper protective casing (2), able to contain the apron (1), and comprising a longitudinal lower passage slot (3) shaped to pass successively said longitudinal blades (L) during the movement (D) of the deck (1), - a winding shaft (4) in the protective box (2), around which the deck (1) can be wound, - means for driving the winding shaft (4) in rotation and to operate the apron (1) between a wound position in which it is wound around the winding shaft (4) and in which the blade of end (L ') of the apron (1) is in the vicinity of the long slot passing thimble (3), and an extended position in which it closes the opening and in which the end blade (L ') of the apron (1) is opposite the protective box (2) in the opening (100), - the end blade (L ') and the longitudinal passage slot (3) of the protective box (2) being shaped so that the end blade (L') closes the longitudinal slot of passage (3) of the protective box (2) when the shutter is in the wound position.

Description

The present invention relates to roller shutters such as

  those used in buildings to close openings such as windows or doors. A roller shutter usually includes:

  - A deck, formed of longitudinal blades articulated laterally to each other along their longitudinal edges, adapted to be displaced substantially parallel to the opening, and having a longitudinal end plate generally forming the free lower edge of the deck,

  a protective box, able to contain the apron, and comprising a slot

  longitudinally shaped passage to pass successively said longitudinal blades during the movement of the deck, the protective box generally forming the upper edge of the opening,

  a winding shaft, housed in the protective casing, and around which the apron can be wound,

  - Drive means for rotating the winding shaft, so as to operate the deck between a wound position in which it is wound around the winding shaft and wherein the end blade of the deck is in the vicinity of the longitudinal slot passage, along the upper edge of the opening, and an extended position in which the apron closes

  the opening and in which the end blade of the apron is opposite the protective box in the opening, along the lower edge of the opening.

  In the usual way, the longitudinal blades of a roll shutter apron are made of polyvinyl chloride.

  In known rolling shutters, in the wound position, the blade

  end of the deck is in the vicinity of the longitudinal slot passage. This end blade does not close the longitudinal slot of passage, but leaves a ventilation passage between the outside and the inside of the building. This ventilation is useful for sanitizing the building, and the protective box itself is generally used as a ventilation passage.

  However, this passage of ventilation is also an entry through which insects frequently enter the protective box. Once inside, the insects are trapped and can hardly stand out. Being sheltered, they make their nest, like bees for example. It is then necessary to open the box of protection to rid it of its "inhabitants".

  In addition, the insects inside the protective box produce audible and rapidly harmful sound waves. These sound waves are also trapped in the protective box and resonate. 41FDEP.doc 2 The protection box then becomes a sound box naturally amplifying the sound waves. More deleteriously, the ventilation passage allows the transmission of noise between the inside and the outside of the building and vice versa.

  In order to reduce this nuisance, it has been thought to cover the inner walls of the protective box with sound insulating materials.

  However, this solution is still insufficient.

  A problem proposed by the present invention is to design a shutter designed to reduce the transmission of noise.

  Another object of the invention is to design such a shutter which ensures both the non-transmission of phonic noise and ventilation useful for the sanitation of a building.

  To achieve these and other objects, the invention provides a shutter for closing an opening, comprising:

  - A deck, formed of longitudinal blades articulated laterally to each other along their longitudinal edges, adapted to be displaced substantially parallel to the opening, and having a longitudinal end plate generally forming the free lower edge of the deck,

  a protective box, able to contain the apron, and comprising a slot

  longitudinal passage shaped to pass successively said longitudinal blades during the movement of the deck, the box generally forming the upper edge of the opening,

  a winding shaft, housed in the protective casing, and around which the apron can be wound,

  - Drive means for rotating the winding shaft, so as to operate the deck between a wound position in which it is wound around the winding shaft and wherein the end blade of the deck is in the vicinity of the longitudinal slot passage, along the upper edge of the opening, and an extended position in which the apron closes

  the opening and in which the end blade of the apron is opposite the protective box in the opening, along the lower edge of the opening,

  and in which the end blade and the longitudinal passage slot of the protective box are shaped so that the end plate closes the longitudinal passage slot of the protective box when the apron is in position

wound.

  The shutter thus designed prevents noise from being transmitted from the inside to the outside of the building and vice versa. In addition, such a simple design offers the advantage that a roller shutter already installed to close an opening can be easily modified by simply replacing the existing shutter end blade with a blade. end capable of ensuring the closure of the longitudinal slot passage. This modification

  is therefore cheaper, there is indeed no obligation to change the entire roller shutter.

  Advantageously, it can be provided that the end plate comprises a closing portion whose thickness is greater than the width of the longitudinal passage slot and whose two opposite faces abut against

  the respective lips of the longitudinal slot passage in rolled position of the apron.

  The desired obturation of the longitudinal slot passage is thus naturally.

  For example, the end blade can be shaped like a wedge

  inverted, the end blade penetrating partially into the protective box through the longitudinal slot passage to abut against the respective lips of the longitudinal slot passage in rolled position of the deck.

  We can also give the end blade any other shape that allows this automatic mechanical shutter.

  Preferably, it can be provided that the closure portion comprises two transverse shutter facets, respectively disposed on one and the other of the opposite faces of the end plate, and bearing against the lips of the slot longitudinal passage of rolled position of the apron.

  These transverse shutter facets facilitate the realization of a

  sealing shutter which ensures a good sound insulation.

  It can advantageously be provided that the transverse shutter facets are substantially coplanar and perpendicular to the average plane of the deck.

  Thus, the closing of the longitudinal slot passage will be done naturally.

  The transverse facets of closure can also be given different dimensions to fulfill other functions.

  Thus, the same end blade having at least one oversize transverse facet can be used to seal the longitudinal slot

  passage of several types of protective box having different dimensions. It can be advantageously provided that the end plate is in one piece.

  The one-piece profile of the end blade is easy to manufacture, and this configuration limits the problems of detachment, deformation or other

  degradations of the transverse shutter facets. For example, this reduces the risk of user-induced degradation that would force the rolling shutter to continue rolling past the wound position.

  Advantageously, it is possible to provide a seal interposed between each of the opposite faces of the end plate and the corresponding lips of the longitudinal passage slot.

  The seal seals the sealing of the longitudinal slot passage.

  Thus, it improves further the sealing of the shutter, and the sound insulation.

  According to a first embodiment, it is possible for the seals to be carried by the end plate.

  According to a second embodiment, it can be provided that the seals are on the lips of the longitudinal slot passage.

  These two embodiments make it possible to ensure effective closure of the longitudinal passage slot.

  It can be expected that these seals are resilient and can be partially crushed so that the seal is better.

  To further ensure the ventilation useful for the sanitation of a building, it is advantageous to provide a bypass ventilation passage 25 of the protective box.

  Thus, the ventilation of a building is ensured permanently, even when the longitudinal slot passage of the protective box is closed by the end blade.

  Advantageously, a ventilation passage 30 may be provided comprising a baffled structure which opposes a sound transmission.

  Noise can not spread in the ventilation passage and

  is stopped by successive quibbles.

  Advantageously, it can be provided that the end plate is made of aluminum, in order to confer on it an increased mechanical strength allowing it to

  35 to withstand significant mechanical stresses at the end of winding of the deck, while other blades of the deck, less stressed can be plastic. Other objects, features and advantages of the present invention will be apparent from the following description of particular embodiments, in connection with the accompanying figures, in which: FIG. 1 is a cross sectional view of a protective box with rolling shutter in the wound position according to a first configuration of the prior art; - Figure 2 is a cross-sectional view of a protective box with rolling shutter wound position according to a second configuration of the prior art; - Figure 3 is a cross-sectional view of a protective box with rolling shutter in the wound position according to a first embodiment of the invention, in a first configuration; FIG. 4 is a cross-sectional view of a protective box with rolling shutter in the wound position according to the embodiment of the invention of FIG. 3, in a second configuration; - Figure 5 is a cross-sectional view of a protective box with rolling shutter wound position according to a second embodiment of the invention, in the first configuration; and FIG. 6 is a cross-sectional view of the roller shutter of FIG. 4 in a configuration which provides bypass ventilation. Figures 1 to 6 illustrate in cross section a protective box 2 with a shutter 1 in the wound position in embodiments of the prior art and in embodiments of the invention. Certain structural elements are common to the prior art and the present invention. They will be described in more detail below with the description of Figures 1 and 2. Figures 1 and 2 illustrate two configurations of the prior art, in which a roller shutter comprises an apron 1, and is formed of longitudinal blades L The longitudinal blades L are articulated laterally to each other along their longitudinal edges. In addition, the apron 1 comprises a longitudinal end blade L '. The longitudinal end blade L 'is of substantially oblong section and has two opposite faces F1 and F2. It has a thickness E of about 10 mm.

  The apron 1 is intended to be wound around a winding shaft 4, located in a protective box 2. The protective box 2 is a generally parallelepipedal structure limited in particular by an upper wall 2a, a lower wall 2b, an inner wall 2c and an outer wall 2d. A cellular material 2e internally covers in particular the inner wall 2c, for

  provide essentially thermal insulation.

  The protective casing 2 comprises, in its bottom wall 2b, a longitudinal passage slot 3 delimited by two lips 3a and 3b so as to pass successively through said longitudinal strips L during their displacement illustrated by the double arrow D. This longitudinal slot of passage 3

  has a width L1 of about 14 mm.

  The protective box 2 is placed along the upper edge of an opening 100 of a building, in a rebate 101 of the upper wall 102 which, with the lower wall 103, defines the opening 100. The shutter is used to seal selectively the opening 100.

  When using the rolling shutter, the user controls, manually or electrically, drive means such as a crank winch, a belt winch, an electric motor, for rotating the winding shaft. 4 so as to wind the apron 1 around the winding shaft 4, located in the protective casing 2, or to unwind it for

  adjust the shutter of the aperture 100.

  In the closed position, the apron 1 completely closes the opening 100, and is located on a medium plane A-A.

  In wound position, the end blade L 'of the apron 1 is located in the vicinity of the longitudinal passage slot 3, so that the face F1 of the

  end plate L 'is located opposite the lip 3a and the face F2 of the end plate L' is located opposite the lip 3b.

  The thickness E of the end plate L 'being smaller than the width of the longitudinal passage slot 3, all kinds of waves and insects can be introduced into the protective box 2 by passing between the blade end of the

and the lips 3a and 3b.

  The sound waves are thus transmitted from the interior Y of the building to the outside X of the building and vice versa.

  FIG. 2 illustrates a second configuration of the prior art, in which is added to the device of FIG. 1 an internal covering 9 of the box

  protection 2. This internal cover 9 is intended to dampen the sound waves entering the protective box, to prevent their transmission between the interior and exterior of the building. 4IFDIiP.doc 7 This inner cover 9 covers a portion of the inner wall 2c of the protective box 2 which is oriented towards the interior of the building, a portion of the upper wall 2a and a portion of the bottom wall 2b of the protective box 2. This internal cover 9 does not ensure sufficient damping of sound waves.

  Figures 3 to 6 illustrate embodiments according to the present invention. The structural elements identified by the same numerical references as those of FIGS. 1 and 2 are common to the invention and to the state of the art, and are therefore not described again.

  Figures 3 and 4 illustrate a rolling shutter according to first and second configurations of a first embodiment of the present invention.

  In FIGS. 3 and 4, the end blade L 'comprises two opposite lateral wings 5a and 5b whose upper faces define two transverse shutter facets 5c and 5d respectively disposed on one and the other of the main faces. opposite F1 and F2 of the end plate L '. The two transverse shutter facets 5c and 5d are substantially coplanar and perpendicular to the average plane A-A of the deck 1.

  These two transverse facets 5c and 5d constitute a closure portion of thickness E which is greater than the width L1 of the longitudinal passage slot 3. Thanks to these dimensions, the two transverse facets 5c and 5d therefore constitute a simple mechanical stop. winding the apron 1.

  In the wound position of the apron 1, the two transverse shutter facets 5c and 5d bear against the lips 3a and 3b of the longitudinal passage slot 3.

  In order to increase the sealing of the protective casing 2, a seal 6 is interposed between each of the opposite faces F1 and F2 of the end plate L 'and the corresponding lips 3a and 3b of the longitudinal passage slot. 3.

  The presence of the seals 6 makes it possible to gain another 5 dB of weakening of the acoustic waves transmitted, and thus to move to a better class, according to the classification acutherme of the Scientific and Technical Center of the Building.

  In the embodiments illustrated in FIGS. 3 to 6, the seals

  Sealing members 6 are hollow half-cylinder shaped profiles made of elastomer. With such a conformation, the seals 6 have a large capacity of elastic crushing. This allows them, in particular, to adapt to the defects of construction of buildings in spite of these, to ensure a good watertightness.

  These seals 6 may have a diameter substantially equal to half the length of the smallest cross-section facet 5c or 5d, or half the thickness of the end plate L '.

  The acoustic seal provided by such joints 6 hollow half-cylinder is excellent, probably because they constitute a double wall forming two successive barriers that the sound waves must cross.

  In the first embodiment illustrated in FIGS. 3 and 4, the end blade L 'carries a seal 6 on each of the two transverse facets 5c and 5d.

  Each seal 6 is for example glued by its flat diametrical face on one of the transverse facets 5c and 5d.

  In the configuration shown in FIG. 4, there is the internal covering 9 of FIG.

  FIG. 5 illustrates a second embodiment of the invention, according to which a seal 6 is provided on each of the lips 3a and 3b of the longitudinal passage slot 3, and oriented to bear against the transverse facets

  Corresponding 5c or 5d in the wound position of the apron 1.

  In this embodiment, each seal 6 comprises a fixing blade 6a engaged in an undercut groove 30 of one of the lips 3a and 3b of the longitudinal passage slot 3.

  FIG. 6 illustrates the device of FIG. 4 to which a ventilation passage 7 has been added as a bypass of the protective box 2.

  To prevent the ventilation passage from being a kind of conduit through which sound waves could be transmitted, the ventilation passage 7 comprises a baffled structure 8a, 8b, 8c to oppose a sound transmission.

  Acoustic tests were carried out on the shutters of FIGS. 1 to 4. During these tests, the attenuation of the sound waves transmitted between the outside and the inside of the building was measured. The results are summarized in the table: Prior Art (FIG. 1) 41 dB Prior art (FIG. 2) 46 dB Invention (FIG. 3) 51 dB Invention (FIG. 4) 54 dB 41FDEP.doc 9 Thus, by comparing the results shutters of Figures 1 and 3, that the invention allows in this case to substantially weaken the transmitted waves, and can earn 10 dB.

  By comparing the results of the shutters of FIGS. 2 and 4, the invention also makes it possible to gain 8 dB in this case.

  The human ear can perceive differences of about 3 dB. The noise is therefore significantly reduced thanks to the invention.

  The present invention is not limited to the embodiments which have been explicitly described, but includes the various variants and generalizations thereof within the scope of the claims below.

Claims (5)

  1 - Roller shutter for closing an opening (100), comprising: - an apron (1), formed of longitudinal blades (L) articulated laterally to each other along their longitudinal edges, able to be moved substantially parallel to the opening (100), and having a longitudinal end plate (L ') generally forming the free lower edge of the deck (1), - a protective box (2), able to contain the deck (1), and comprising a longitudinal slot passage (3) shaped to pass successively said longitudinal blades (L) during the movement (D) of the apron (1), the box generally forming the upper edge of the opening (100), - a shaft d winding (4), housed in the protective box (2), and around which the apron (1) can be wound, - driving means for rotating the winding shaft (4), so as to Maneuvering the apron (1) between a wound position in it is wound around the winding shaft (4) and in which the end blade (L ') of the apron (1) is in the vicinity of the longitudinal passage slot (3), along the upper edge of the opening (100), and an extended position in which the apron (1) closes the opening (100) and in which the end blade (L ') of the apron (1) is opposite the housing protection device (2) in the opening, along the lower edge of the opening (100), characterized in that the end plate (L ') and the longitudinal passage slot (3) of the protective box ( 2) are shaped so that the end plate (L ') closes the longitudinal slot passage (3) of the protective box (2) when the apron (1) is in the wound position. 2 - roller shutter according to claim 1, characterized in that the end plate (L ') comprises a closing portion whose thickness (E) is greater than the width (L1) of the longitudinal slot ( 3) and whose two opposite faces (F1, F2) abut against the respective lips (3a, 3b) of the longitudinal slot passage (3) in the wound position of the apron (1). 3 - rolling shutter according to claim 2, characterized in that the closure portion comprises two transverse shutter facets (5c, 5d), respectively disposed on one and the other of the opposite faces (F1, F2) of the end blade (L '), and bearing against the lips (3a, 3b) of the longitudinal passage slot (3) in the wound position of the apron (1). 4 - rolling shutter according to claim 3, characterized in that the transverse shutter facets (5c, 5d) are substantially coplanar and perpendicular to the mean plane (A-A) of the deck (1). 5 - roller shutter according to any one of claims 2 to 4, characterized in that a seal (6) is interposed between each of the opposite faces (F1, F2) of the blade of end (L ') and the corresponding lips (3a, 3b) of the longitudinal passage slot (3). 5 6 - rolling shutter according to claim 5, characterized in that the seals (6) are carried by the end plate (L '). 7 - roller shutter according to claim 5, characterized in that the seals (6) are on the lips (3a, 3b) of the longitudinal slot passage (3). 10 8 - roller shutter according to any one of claims 5 to 7, characterized in that the seals (6) are hollow elastomeric half-cylinder shaped profiles. 9 - rolling shutter according to any one of claims 1 to 8, characterized in that the end plate (L ') is monobloc. Roller shutter according to any one of claims 1 to 9, characterized in that a ventilation passage (7) is provided as a by-pass of the protective box (2). 11 - rolling shutter according to claim 10, characterized in that the ventilation passage (7) comprises a baffled structure (8a, 8b, 8c) to oppose a sound transmission. 12 - rolling shutter according to any one of claims 1 to 11, characterized in that the end plate (L ') is aluminum.