EP2251859B1 - Noise absorbing panel - Google Patents

Noise absorbing panel Download PDF

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Publication number
EP2251859B1
EP2251859B1 EP20100004905 EP10004905A EP2251859B1 EP 2251859 B1 EP2251859 B1 EP 2251859B1 EP 20100004905 EP20100004905 EP 20100004905 EP 10004905 A EP10004905 A EP 10004905A EP 2251859 B1 EP2251859 B1 EP 2251859B1
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EP
European Patent Office
Prior art keywords
panel
grooves
sound
cutouts
visible
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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.)
Not-in-force
Application number
EP20100004905
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German (de)
French (fr)
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EP2251859A1 (en
Inventor
Michael Gilli
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HOLZ PICHLER SPA
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Holz Pichler SpA
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Publication of EP2251859A1 publication Critical patent/EP2251859A1/en
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Publication of EP2251859B1 publication Critical patent/EP2251859B1/en
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B1/84—Sound-absorbing elements
    • E04B1/86—Sound-absorbing elements slab-shaped
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B1/84—Sound-absorbing elements
    • E04B2001/8457—Solid slabs or blocks
    • E04B2001/8476—Solid slabs or blocks with acoustical cavities, with or without acoustical filling
    • E04B2001/848—Solid slabs or blocks with acoustical cavities, with or without acoustical filling the cavities opening onto the face of the element
    • E04B2001/849—Groove or slot type openings
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B1/84—Sound-absorbing elements
    • E04B2001/8457—Solid slabs or blocks
    • E04B2001/8476—Solid slabs or blocks with acoustical cavities, with or without acoustical filling
    • E04B2001/848—Solid slabs or blocks with acoustical cavities, with or without acoustical filling the cavities opening onto the face of the element
    • E04B2001/8495—Solid slabs or blocks with acoustical cavities, with or without acoustical filling the cavities opening onto the face of the element the openings going through from one face to the other face of the element

Definitions

  • the invention relates to a rectangular sound-absorbing panel which is made of a piece of solid wood, of composite wood of the type lamellar or glued wood or of a wood-derived material, which on the, in the mounted state, frontal visible panel surface recesses, such as. zueinender parallel longitudinal grooves and / or bores or recesses which are arranged according to the longitudinal axis of the panel, while provided on the opposite rear, not visible, surface, transverse grooves which extend to the longitudinal axis of the panel at an angle of approximately 90 ° or inclined, wherein the rear transverse grooves have such a depth that, in the areas of superposition with the frontal grooves, bores, recesses and / or bores, free passages are obtained.
  • the panel itself or the panel which is provided in a known manner on the non-visible surface with panels, mats or webs of sound-absorbing, or sound-insulating, material, in conjunction with identical or similar panels which a different aesthetics, determined by have the nature and arrangement of the visible grooves, recesses and / or holes, suitable for the creation of soundproofing panels.
  • FR 1.015.972 (Francine Gilbert ) are known simple or composite sound-absorbing panels which are provided with grooves, one on the visible front surface and the other on the back surface; the depth of said grooves is such that free passages are obtained at the overlapping points. Said grooves have a constant depth over their entire longitudinal extent and thus the cross section of the panel is in all areas, even in the field of attachment between the panels or the attachment to a support structure or support surface, uniform.
  • the absorption and dispersion effect of the panel is effective for sounds within a particular frequency while the effect on other frequencies is weaker or ineffective .
  • the Absorbtions bin, or dispersion effect, said panels is therefore the same for the entire extent of the panel.
  • the object of the described invention is to provide a sound absorbing panel in which it is possible to choose the design of the panels with respect to the objects to be solved and the circumstances by varying the determining parameters. This object is achieved in that the recesses on the visible surface have different shape from the recesses on the opposite surface.
  • the panel has uniform dimensions, shapes and thus also constant sound absorption over the entire extent; Furthermore, the panel does not provide an area with a more resistant and stable cross-section to use for connecting and / or anchoring the individual panels.
  • a decorative acoustic panel in which, be it on the front visible, the sound source facing surface, as well as on the rear surface, mutually parallel grooves are provided, the front grooves are arranged symmetrically to the rear. The remaining wall between each front and rear groove is penetrated by holes.
  • the front groove may be wavy, triangular or concave / convex with respect to the groove bottom.
  • the corrugated, triangular or concave / convex groove base of the front grooves causes, especially with inclined inclined to the groove direction panels, the connection area adjacent the panel, due to the varying groove depth, visually unfavorable.
  • the varying groove depth on the visible front panel surface further causes the connection to the adjacent panel and the relevant connector with this, hardly a uniform joint is feasible.
  • These panels have no thicker cross-section at the edge of the groove for a solid attachment to a mounting structure or to give greater dimensional stability to the panel, for example, the panel tends to be transverse to the course of the grooves even at low compression, according to the course of the cross-sectional reductions to arch.
  • passages between the front grooves and the rear grooves are made by drilling, so it must be carried out in the production, for example in wood, three operations with different tools.
  • the passages between the front and rear grooves made by the bores cause the sound not to reach the rear groove directly from the front groove, but reach it only after passing through holes of different lengths.
  • US 2008/0289901 A1 discloses a panel having the features of the preamble of claim 1.
  • the invention has as its object to provide a rectangular sound-absorbing panel panel of the type described above which is made of a single piece of solid wood, laminated wood of the type lamellar wood, laminated wood or a wood-derived material which is suitable to absorb sound within a wide frequency range, which has a stable shape to facilitate easy, safe and durable installation, the dimensional stability allows the mounting of the panels alone or in a known manner in combination with other panels, mats or sheets of sound-absorbing material.
  • the invention proposes that the front recesses which, when mounted panel, are visible and have the form of grooves, recesses and / or holes, have such aesthetic width, shape and arrangement that, in the assembly with identical A uniform design is created for panels, while the depth of the grooves, recesses and / or holes is different for acoustic reasons.
  • the recesses on the rear surface according to the invention always have the form of grooves which, to the longitudinal axis of the panel, 90 ° transverse or angled run, are parallel to each other and may have the same or different width and distances.
  • These recesses have much smaller depth, or missing (depth equal to 0), at least in the longitudinal edge regions of the panel, but possibly also in the transverse edge areas, in these areas of mutual connection of the panels, eg by means of plug connection and / or anchoring or attachment of the Panels on a supporting surface or structure to have a larger, more resistant and dimensionally stable cross-section.
  • the said rear transverse grooves may have the same or varying depth in the central region, for example with a circular arc groove bottom.
  • the combination of the front grooves and / or the holes with the rear grooves causes the free passages which are formed in the overlapping areas between the said recesses to be arranged in different planes and that, due to the reflective surfaces with different expansion and with different arrangement with respect on the visible surface of the panel, along with the different ones absorbent volumes disposed at the front and back of the free passageways produce a different dispersion and absorption effect to achieve good sound attenuation for a wide range of sound frequencies.
  • this acoustic effect can be further influenced by the fact that the front recesses, recesses and or bores, viewed in cross-section, are all or partially angled against one or the opposite longitudinal edge region, without precluding a V-shaped arrangement of two grooves, recesses or bores wherein the common opening thereof is visible on the visible surface of the panel like the opening of a simple groove, recess and / or bore.
  • the rear grooves on the non-visible surface of the panel can be performed by means of a saw blade or a disc milling machine which has a diameter such that the feed creates a groove whose groove bottom is circular arc-shaped, wherein the circular arc begins, for example, on one of the longitudinal edges of the panel and on the mutual longitudinal edge ends, without precluding that the adjustment of the saw blade or the disc milling machine in the direction of the panel may be such that in the region of the longitudinal edges, or only one of the longitudinal edges, the rear panel surface remains unaffected or that the groove has a depth which is lower than the plane is which contains the longitudinal edges.
  • the rear grooves may also have a groove bottom which extends in the two extreme longitudinal areas of the panel in a circular arc while it can be rectilinear horizontally, rectilinear or wavy in the central region by the cutting tool is moved straight across with constant depth of cut in the first case, in the second case the cutting tool is moved in a straight line with progressively increasing or decreasing depth of cut, and in the third case, the cutting depth is changed cyclically with respect to the transverse displacement of the tool.
  • a series of rear grooves or may all be provided on the back of the panel grooves, by means of a single shaft equipped with a plurality of mutually spaced, saw blades or disc milling performed, the width of the grooves by a single cut or by several consecutive cuts can be determined.
  • the invention further does not exclude that the width and / or the mutual distance of the rear grooves is different; in the case of grooves at an angle of 90 ° to the longitudinal axis of the panel, it may be possible to use the same cutting tool used to cut the panel, which is used to make the grooves, with a depth of cut greater than the thickness of the panel.
  • several cutting blades are mounted on the same shaft, there is a possibility that at the beginning and at the end of the row of blades for the grooves, one saw blade with a larger diameter is provided for cutting the panel to length.
  • the panel after execution of the rear grooves, advantageously in a single pass, the front grooves, recesses and holes, as well as the connectors on the longitudinal edges and the planing of the panel surfaces are performed.
  • the Fig. 1 shows a perspective view of a part of a sound-absorbing panel according to the invention with front grooves on the panel visible on mounted panel which have different depth and with rear grooves on the non-visible surface which have the shape of a circle segment.
  • the Fig. 2 shows the front view of the same in Fig. 1 shown sound-absorbing panel which is laterally connected by means of plug connection with an identical panel only partially shown.
  • the Fig. 2a shows in detail the front view of the extreme lateral region of the connector of a sound-absorbing panel according to the invention wherein a portion of the rear invisible surface near the rear longitudinal edges is uncut and the bottom of the rear grooves in the vicinity of the longitudinal edges of the panel parallel to the front longitudinal grooves runs in a circular arc and runs straight between these areas.
  • the Fig. 2b shows in front view the detail of the extreme lateral, parallel to the front longitudinal grooves, region of a sound-absorbing panel according to the invention, wherein the rear grooves, in the region of the front longitudinal grooves parallel longitudinal edges of the panel, have a certain depth.
  • the Fig. 3 shows a corner portion of a panel according to the invention which has parallel longitudinal grooves on the front and 45 ° at the rear angled transverse grooves.
  • the Fig. 4 shows a corner portion of a panel according to the invention which has holes on the front and transverse grooves on the back side, the latter forming an angle of 90 ° with the longitudinal side edges of the panel.
  • the Fig. 5 shows a corner portion of a panel according to the invention which has at the front holes in alternation with slots and on the back transverse grooves, the latter forming an angle of 45 ° with the longitudinal side edges of the panel.
  • the Fig. 6 shows a corner region of a panel according to the invention which is provided at the front with longitudinal grooves and with holes and at the back has transverse grooves which form 45 ° with the longitudinal edges of the panel.
  • Fig. 7 shows the cross section through a panel according to the invention which on the front longitudinal grooves which are inclined against one or the other longitudinal edge of the panel and which has a groove which branches in the interior of the panel in two V-shaped grooves which both with the rear transverse grooves have a circular arc ground connection.
  • the panel of solid wood of lamellar wood or of a wood-derived material, e.g. wood chips or wood fibers having a rectangular shape and a certain thickness is provided on the visible or front surface A with a series of grooves 2, recesses 2b and / or bores 9 which are arranged parallel to each other while on the rear surface B rear mutually parallel transverse grooves 1 which are arranged at an angle of 90 ° or inclined to the longitudinal axis of the panel; They have the shape of circle segments with their chord equal to the width of the rear surface B and the groove depth is greatest in the central region of the panel.
  • the depth of the front grooves 2, recesses 2b and / or holes 9 is dimensioned such that, in the areas of superposition of these with the rear grooves 1, free passages 2a arise.
  • connection between the longitudinal edges of the panels is made by means of a longitudinal spring 5 and a corresponding longitudinal groove 4.
  • the surfaces are at the said Plug connection formed so that in the region of this a groove is formed whose width corresponds to that of the front grooves 2; the said groove being formed by horizontally displacing the lateral surface 7 on the side of the visible surface A of the panel, opposite the corresponding surface 6 on the side of the rear surface B del panel, by the amount of the width of the grooves 2; On the side of the groove 4, however, lie the lateral surfaces 8 in a single vertical plane.
  • the rear grooves 1, in the region of the longitudinal edges 1a can have such a depth and shape that the edges 1a are not interrupted ( Fig. 1 . 2 ) that, in addition to the edge 1a, a certain area 1b of the rear face B of the panel 1 is not interrupted ( Fig. 2a ) or that one or both edges 1a through the depth of cut 1c ( Fig. 2b ) to be interrupted.
  • the cross section of the two portions 3, 3a of the longitudinal edge region of the panel 1 is always larger with respect to the cross sections of the portions 3b which are between the two front grooves 2, between the two rows of recesses 2b and / or between the two Rows of holes 9, near the respective longitudinal edges of the panel, extend.
  • the invention does not exclude that a plug-in connection is also provided on the end faces of the panel, or that the connection is produced by known connecting elements which are worked from the panel itself or as separate elements, such as e.g. Dowels to be attached.
  • the process for the manufacture of the panel according to the invention is relatively simple and practicable by means of known, widely used, maintenance-friendly, functionally reliable devices.
  • the basic method requires a circular saw or a disc milling machine for cutting the rear grooves 1 with linear automatic feed which, with respect to the axis of rotation of the saw blade or the disc cutter, regarding the depth of cut, is adjustable. It is not excluded that several saw blades or disc milling on a single Shaft are mounted so that at the same time several rear grooves 1 or all rear grooves 1 can be cut simultaneously.
  • the same single saw blade or the same disc milling machine according to the invention can also be used for cutting the panel parallel to the rear grooves 1.
  • a saw blade of larger diameter may be provided on the same shaft at the end and / or the beginning of the row of saw blades or disc milling, so that during the Cutting the grooves 1, the panel is cut to length.

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  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Building Environments (AREA)

Description

Die Erfindung bezieht sich auf ein rechteckiges schallabsorbierendes Paneel welches aus einem Stück Massivholz, aus Verbundholz von der Art Lamellenholz oder Leimholz oder aus einem vom Holz gewonnenen Werkstoff hergestellt ist, welches auf der, im montierten Zustand, frontalen sichtbaren Paneelfläche Aussnehmungen, wie z.B. zueinender parallele Längsrillen und/oder Bohrungen oder Aussparungen welche gemäß der Längsachse des Paneels angeordnet sind aufweist, während an der entgegengesetzten hinteren, nicht sichtbaren, Fläche, Querrillen vorgesehen sind welche zur Längsachse des Paneels in einem Winkel von ca. 90° oder geneigt verlaufen, wobei die hinteren quer verlaufenden Rillen eine derartige Tiefe aufweisen dass, in den Bereichen der Überlagerung mit den frontalen Rillen, Bohrungen, Aussparungen und/oder Bohrungen, freie Durchgänge erhalten werden. Erfindungsgemäß ist das Paneel selbst, oder das Paneel welches auf bekannte Art an der nicht sichtbaren Fläche mit Paneelen, Matten oder Bahnen aus schallabsorbierendem, bzw. schalldämmendem, Werkstoff ausgestattet ist, in Verbindung mit identischen oder mit gleichartigen Paneelen welche eine unterschiedliche Ästhetik, bestimmt durch die Art und die Anordnung der sichtbaren Rillen, Aussparungen und/oder Bohrungen aufweisen, für die Erstellung schalldämmender Verkleidungen geeignet.The invention relates to a rectangular sound-absorbing panel which is made of a piece of solid wood, of composite wood of the type lamellar or glued wood or of a wood-derived material, which on the, in the mounted state, frontal visible panel surface recesses, such as. zueinender parallel longitudinal grooves and / or bores or recesses which are arranged according to the longitudinal axis of the panel, while provided on the opposite rear, not visible, surface, transverse grooves which extend to the longitudinal axis of the panel at an angle of approximately 90 ° or inclined, wherein the rear transverse grooves have such a depth that, in the areas of superposition with the frontal grooves, bores, recesses and / or bores, free passages are obtained. According to the invention, the panel itself, or the panel which is provided in a known manner on the non-visible surface with panels, mats or webs of sound-absorbing, or sound-insulating, material, in conjunction with identical or similar panels which a different aesthetics, determined by have the nature and arrangement of the visible grooves, recesses and / or holes, suitable for the creation of soundproofing panels.

Aus der FR 1.015.972 (Francine Gilbert ) sind einfache oder zusammengesetzte schallabsorbierende Paneele bekannt welche mit Rillen versehen sind und zwar die einen an der sichtbaren vorderen Fläche und die anderen an der rückseitigen Fläche; die Tiefe der besagten Rillen ist derart dass an den Überlagerungspunkten freie Durchgänge erhalten werden. Die besagten Rillen haben über ihre gesamte Längserstreckung gleichbleibende Tiefe und somit ist der Querschnitt des Paneels in allen Bereichen, auch im Bereich der Befestigung zwischen den Paneelen oder der Befestigung an einer Trägerstruktur oder Trägerfläche, gleichförmig. Wegen der gleichförmigen Geometrie der, der Schallquelle ausgesetzten Fläche und wegen der eventuell unterschiedlichen Geometrie welche sich über das gesamte Paneel erstreckt, ist der Absorbtions- und Dispersionseffekt des Paneels für Töne innerhalb einer bestimmten Frequenz wirksam während der Effekt betreffend andere Frequenzen schwächer ist oder nicht wirkt. Der Absorbtionseffekt, bzw. Dispersionseffekt, der besagten Paneele ist also der selbe für die gesamte Ausdehnung des Paneels.From the FR 1.015.972 (Francine Gilbert ) are known simple or composite sound-absorbing panels which are provided with grooves, one on the visible front surface and the other on the back surface; the depth of said grooves is such that free passages are obtained at the overlapping points. Said grooves have a constant depth over their entire longitudinal extent and thus the cross section of the panel is in all areas, even in the field of attachment between the panels or the attachment to a support structure or support surface, uniform. Because of the uniform geometry of the area exposed to the sound source, and because of the possibly different geometry that extends across the entire panel, the absorption and dispersion effect of the panel is effective for sounds within a particular frequency while the effect on other frequencies is weaker or ineffective , The Absorbtionseffekt, or dispersion effect, said panels is therefore the same for the entire extent of the panel.

Aus der CH 683112 A5 (Fries Arthur ) ist ein Paneel bekannt welches an beiden Hauptflächen mit Ausnehmungen versehen ist welche in den Bereichen ihrer Überlagerung im Innern des Paneel unter sich kommunizieren. Diese Ausnehmungen haben an den zwei Flächen unterschiedliche Form, z.B. die Form von Rillen an der sichtbaren Fläche und von Bohrungen an der gegenüberliegenden Fläche. Die Aufgabe der beschriebenen Erfindung besteht in der Schaffung eines schallabsorbierenden Paneels bei welchem es möglich ist die Ausführung der Paneele in Bezug auf die zu lösenden Aufgaben und der Umstände zu wählen indem die bestimmenden Parameter variiert werden. Diese Aufgabe wird dadurch gelöst dass die Ausnehmungen an der sichtbaren Fläche unterschiedliche Form gegenüber den Ausnehmungen an der entgegengesetzten Fläche haben. Auch diese Aufgabe sieht vor dass, trotz der Möglichkeit auf verschiedene Art die Tiefe, die Längsmaße und die Form insbesondere der Ausnehmungen an der sichtbaren Fläche.zu verändern, das Paneel über die gesamte Erstreckung, gleichbleibende Maße, Formen und somit auch gleichbleibende Schallabsorbtion hat; weiters ist am Paneel nicht ein Bereich mit widerstandsfähigerem und stabilem Querschnitt vorgesehen um diesen für die Verbindung und/oder für die Verankerung der einzelnen Paneele zu nutzen.From the CH 683112 A5 (Fries Arthur ) is a panel is known which is provided on both major surfaces with recesses which communicate in the areas of their superposition inside the panel below. These recesses have different shapes on the two surfaces, eg the shape of grooves on the visible surface and of holes on the opposite surface. The object of the described invention is to provide a sound absorbing panel in which it is possible to choose the design of the panels with respect to the objects to be solved and the circumstances by varying the determining parameters. This object is achieved in that the recesses on the visible surface have different shape from the recesses on the opposite surface. This task also provides that, despite the possibility of varying the depth, the longitudinal dimensions and the shape, in particular of the recesses on the visible surface, in a variety of ways, the panel has uniform dimensions, shapes and thus also constant sound absorption over the entire extent; Furthermore, the panel does not provide an area with a more resistant and stable cross-section to use for connecting and / or anchoring the individual panels.

Aus der US 2007/0193175 ist ein dekorierendes Akustik-Paneel bekannt bei welchem, sei es an der vorderen sichtbaren, der Tonquelle zugewandten Fläche, als auch an der hinteren Fläche, zueinander parallele Rillen vorgesehen sind, dabei sind die vorderen Rillen symmetrisch zu den hinteren angeordnet. Die verbleibende Wand zwischen jeder vorderen und hinteren Rille wird von Bohrungen durchdrungen. Die vordere Rille kann, was den Rillengrund betrifft, wellenförmig, dreieckförmig oder konkav/konvex verlaufen. Diese Paneele weisen den Nachteil auf dass sie, wegen der Überlagerung jeder vorderen Rille mit jeder hinteren Rille, eine Reihe ausgeprägter Querschnittsverminderungen aufweisen welche durch die Bohrungen zusätzlich geschwächt werden. Diese Bereiche mit vermindertem Querschnitt erstrecken sich alle bis zum äußersten Rand des Paneels. Der wellenförmig, dreieckförmig oder konkav/konvex verlaufende Rillengrund der vorderen Rillen bewirkt dass, insbesondere bei zur Rillenrichtung geneigt zugeschnittenen Paneelen, der Anschlussbereich am anliegenden Paneel, wegen der variierenden Rillentiefe, optisch ungünstig auffällt. Die variierende Rillentiefe an der sichtbaren vorderen Paneelfläche bewirkt weiters, dass der Anschluss zum anliegenden Paneel und die betreffende Steckverbindung mit diesem, kaum als gleichmäßige Fuge realisierbar ist. Diese Paneele verfügen im Randbereich, quer zum Rillenverlauf über keinen stärkeren Querschnitt für eine solide Befestigung an einer Montagestruktur oder um dem Paneel eine größere Formstabilität zu verleihen, z.B. tendiert das Panel bereits bei geringer Druckbelastung quer zum Verlauf der Rillen sich, gemäß dem Verlauf der Querschnittsverminderungen, zu wölben. Bei diesen bekannten Paneelen werden Durchgänge zwischen den vorderen Rillen und den hinteren Rillen durch Bohrungen hergestellt, es müssen also bei der Herstellung z.B. in Holz, drei Arbeitsgänge mit unterschiedlichen Werkzeugen durchgeführt werden. Die durch die Bohrungen hergestellten Durchgänge zwischen den vorderen und den hinteren Rillen bewirken, dass der Schall nicht direkt von der vorderen Rille die hintere Rille erreicht, sondern dass er diese erst erreicht nachdem er Bohrungen unterschiedlicher Länge durchläuft.From the US 2007/0193175 a decorative acoustic panel is known in which, be it on the front visible, the sound source facing surface, as well as on the rear surface, mutually parallel grooves are provided, the front grooves are arranged symmetrically to the rear. The remaining wall between each front and rear groove is penetrated by holes. The front groove may be wavy, triangular or concave / convex with respect to the groove bottom. These panels have the disadvantage that, because of the superposition of each front groove with each rear groove, they have a series of pronounced cross-sectional reductions which are additionally weakened by the holes. These areas of reduced cross-section all extend to the very edge of the panel. The corrugated, triangular or concave / convex groove base of the front grooves causes, especially with inclined inclined to the groove direction panels, the connection area adjacent the panel, due to the varying groove depth, visually unfavorable. The varying groove depth on the visible front panel surface further causes the connection to the adjacent panel and the relevant connector with this, hardly a uniform joint is feasible. These panels have no thicker cross-section at the edge of the groove for a solid attachment to a mounting structure or to give greater dimensional stability to the panel, for example, the panel tends to be transverse to the course of the grooves even at low compression, according to the course of the cross-sectional reductions to arch. In these known panels passages between the front grooves and the rear grooves are made by drilling, so it must be carried out in the production, for example in wood, three operations with different tools. The passages between the front and rear grooves made by the bores cause the sound not to reach the rear groove directly from the front groove, but reach it only after passing through holes of different lengths.

US 2008/0289901 A1 offenbart ein Paneel, welches die Merkmale des Oberbegriffs des Anspruchs 1 besitzt. US 2008/0289901 A1 discloses a panel having the features of the preamble of claim 1.

Die Erfindung stellt sich die Aufgabe ein rechteckiges schallabsorbierendes Verkleidungs-Paneel der eingangs beschriebenen Art zu schaffen welches aus einem einzigen Stück Massivholz, Verbundholz von der Art Lamellenholz, Leimholz oder aus einem vom Holz gewonnenen Werkstoff hergestellt ist welches geeignet ist, Schall innerhalb eines breiten Frequenzbereiches zu absorbieren, welches eine stabile Form aufweist um eine leichte, sichere und dauerhafte Montage zu erleichtern, wobei die Formstabilität die Montage der Paneele allein oder auf bekannte Weise im Verbund mit anderen Paneelen, Matten oder Bahnen aus schallabsorbierendem Werkstoff ermöglicht.The invention has as its object to provide a rectangular sound-absorbing panel panel of the type described above which is made of a single piece of solid wood, laminated wood of the type lamellar wood, laminated wood or a wood-derived material which is suitable to absorb sound within a wide frequency range, which has a stable shape to facilitate easy, safe and durable installation, the dimensional stability allows the mounting of the panels alone or in a known manner in combination with other panels, mats or sheets of sound-absorbing material.

Zur Lösung dieser Aufgabe schlägt die Erfindung vor dass die vorderen Ausnehmungen welche, beim montierten Paneel, sichtbar sind und die Form von Rillen, von Aussparungen und/oder Bohrungen aufweisen, aus ästhetischen Gründen derartige Breite, Form und Anordnung haben dass, im Zusammenbau mit identischen Paneelen ein einheitliches Design entsteht während aus akustischen Gründen die Tiefe der Rillen, Aussparungen und/oder Bohrungen unterschiedlich ist. Die Ausnehmungen an der hinteren Fläche haben erfindungsgemäß immer die Form von Rillen welche, zur Längsachse des Paneels, 90° quer oder angewinkelt verlaufen, zueinander parallel sind und gleiche oder unterschiedliche Breite und Abstände aufweisen können. Diese Ausnehmungen haben wesentlich geringere Tiefe, bzw. fehlen (Tiefe gleich 0), mindestens in den Längsrandbereichen des Paneels, aber gegebenenfalls auch in den Querrandbereichen, um in diesen Bereichen der gegenseitigen Verbindung der Paneele, z.B. mittels Steckverbindung und/oder Verankerung oder Befestigung der Paneele an einer tragenden Oberfläche oder Struktur, einen größeren, widerstandsfähigeren und formstabileren Querschnitt aufzuweisen. Die besagten hinteren Querrillen können im mittleren Bereich gleichbleibende oder auch variierende Tiefe aufweisen, z.B. mit kreisbogenförmigem Rillengrund. Die Kombination der vorderen Rillen und/oder der Bohrungen mit den hinteren Rillen bewirkt, dass die freien Durchgänge welche in den Überlagerungsbereichen zwischen den besagten Ausnehmungen entstehen in unterschiedlichen Ebenen angeordnet sind und dass, wegen der reflektierenden Flächen mit unterschiedlicher Ausdehnung und mit unterschiedlicher Anordnung in Bezug auf die sichtbare Fläche des Paneels, zusammen mit den unterschiedlichen absorbierenden Volumen welche an der Vorderseite und an der Rückseite der freien Durchgänge angeordnet sind, einen unterschiedlichen Dispersions- und Absorbtionseffekt erzeugen um eine gute Schalldämpfung für einen breiten Bereich von Schallfrequenzen zu erreichen. Dieser akustische Effekt kann erfindungsgemäß weiter dadurch beeinflusst werden dass die vorderen Aussparungen, Ausnehmungen und oder die Bohrungen, im Querschnitt betrachtet, alle oder zum Teil gegen einen oder den gegenüberliegenden Längsrandbereich angewinkelt sind, ohne eine V-förmige Anordnung zweier Rillen, Ausnehmungen oder Bohrungen auszuschließen, wobei die gemeinsame Öffnung dieser an der sichtbaren Fläche des Paneels gleich wie die Öffnung einer einfachen Rille, Aussparung und/oder Bohrung sichtbar ist.To solve this problem, the invention proposes that the front recesses which, when mounted panel, are visible and have the form of grooves, recesses and / or holes, have such aesthetic width, shape and arrangement that, in the assembly with identical A uniform design is created for panels, while the depth of the grooves, recesses and / or holes is different for acoustic reasons. The recesses on the rear surface according to the invention always have the form of grooves which, to the longitudinal axis of the panel, 90 ° transverse or angled run, are parallel to each other and may have the same or different width and distances. These recesses have much smaller depth, or missing (depth equal to 0), at least in the longitudinal edge regions of the panel, but possibly also in the transverse edge areas, in these areas of mutual connection of the panels, eg by means of plug connection and / or anchoring or attachment of the Panels on a supporting surface or structure to have a larger, more resistant and dimensionally stable cross-section. The said rear transverse grooves may have the same or varying depth in the central region, for example with a circular arc groove bottom. The combination of the front grooves and / or the holes with the rear grooves causes the free passages which are formed in the overlapping areas between the said recesses to be arranged in different planes and that, due to the reflective surfaces with different expansion and with different arrangement with respect on the visible surface of the panel, along with the different ones absorbent volumes disposed at the front and back of the free passageways produce a different dispersion and absorption effect to achieve good sound attenuation for a wide range of sound frequencies. According to the invention, this acoustic effect can be further influenced by the fact that the front recesses, recesses and or bores, viewed in cross-section, are all or partially angled against one or the opposite longitudinal edge region, without precluding a V-shaped arrangement of two grooves, recesses or bores wherein the common opening thereof is visible on the visible surface of the panel like the opening of a simple groove, recess and / or bore.

Vorteilhafterweise können die hinteren Rillen an der nicht sichtbaren Fläche des Paneels mittels eines Sägeblattes oder einer Scheibenfräse ausgeführt werden welche einen derartigen Durchmesser hat dass durch den Vorschub eine Rille entsteht deren Rillenboden kreisbogenförmig ist wobei der Kreisbogen z.B. an einer der Längskanten des Paneels beginnt und an der gegenseitigen Längskante endet, ohne auszuschließen dass das Verstellen des Sägeblattes oder der Scheibenfräse in Richtung Paneel derart sein kann, dass im Bereich der Längskanten, oder nur einer der Längskanten, die hintere Paneelfläche unberarbeitet bleibt oder dass die Rille eine Tiefe hat welche tiefer als die Ebene ist welche die Längskanten enthält. Die hinteren Rillen können auch einen Rillenboden aufweisen welcher in den beiden extremen Längsbereichen des Paneels kreisbogenförmig verläuft während er im mittleren Bereich geradlinig horizontal, geradlinig geneigt oder wellenförmig verlaufen kann, indem im ersten Fall das Schneidwerkzeug geradlinig quer mit gleichbleibender Schnitttiefe bewegt wird, im zweiten Fall das Schneidwerkzeug geradlinig mit progressiv zunehmender oder abnehmender Schnitttiefe bewegt wird und im dritten Fall die Schnitttiefe zyklisch in Bezug auf die Querverschiebung des Werkzeuges verändert wird. Natürlich kann eine Reihe von hinteren Rillen, oder können alle an der Rückseite des Paneels vorgesehenen Rillen, mittels einer einzigen Welle bestückt mit mehreren, zueinander beabstandeten, Sägeblättern oder Scheibenfräsen durchgeführt werden, wobei die Breite der Rillen durch einen einzigen Schnitt oder durch mehrere aufeinanderfolgende Schnitte bestimmt werden kann. Die Erfindung schließt weiters nicht aus, dass die Breite und/oder der gegenseitige Abstand der hinteren Rillen unterschiedlich ist; im Falle von Rillen im Winkel von 90° zur Paneellängsachse, kann für das Ablängen des Paneels eventuell das selbe Schneidwerkzeug genutzt werden welches für die Ausführung der Rillen benutzt wird, wobei eine Schnitttiefe durchgeführt wird welche größer als die Paneelstärke ist. Im Falle dass mehrere Schneidklingen auf der selben Welle montiert sind besteht die Möglichkeit, dass am Anfang und am Ende der Reihe von Klingen für die Rillen je ein Sägeblatt mit größerem Durchmesser für das Ablängen des Paneels vorgesehen ist.Advantageously, the rear grooves on the non-visible surface of the panel can be performed by means of a saw blade or a disc milling machine which has a diameter such that the feed creates a groove whose groove bottom is circular arc-shaped, wherein the circular arc begins, for example, on one of the longitudinal edges of the panel and on the mutual longitudinal edge ends, without precluding that the adjustment of the saw blade or the disc milling machine in the direction of the panel may be such that in the region of the longitudinal edges, or only one of the longitudinal edges, the rear panel surface remains unaffected or that the groove has a depth which is lower than the plane is which contains the longitudinal edges. The rear grooves may also have a groove bottom which extends in the two extreme longitudinal areas of the panel in a circular arc while it can be rectilinear horizontally, rectilinear or wavy in the central region by the cutting tool is moved straight across with constant depth of cut in the first case, in the second case the cutting tool is moved in a straight line with progressively increasing or decreasing depth of cut, and in the third case, the cutting depth is changed cyclically with respect to the transverse displacement of the tool. Of course, a series of rear grooves, or may all be provided on the back of the panel grooves, by means of a single shaft equipped with a plurality of mutually spaced, saw blades or disc milling performed, the width of the grooves by a single cut or by several consecutive cuts can be determined. The invention further does not exclude that the width and / or the mutual distance of the rear grooves is different; in the case of grooves at an angle of 90 ° to the longitudinal axis of the panel, it may be possible to use the same cutting tool used to cut the panel, which is used to make the grooves, with a depth of cut greater than the thickness of the panel. In the case where several cutting blades are mounted on the same shaft, there is a possibility that at the beginning and at the end of the row of blades for the grooves, one saw blade with a larger diameter is provided for cutting the panel to length.

Vorzugsweise werden am Paneel, nach Ausführung der hinteren Rillen, vorteilhafterweise in einem einzigen Durchlauf, die vorderen Rillen, Aussparungen und Bohrungen, sowie auch die Steckverbindungen an den Längsrändern und das Hobeln der Paneelflächen durchgeführt.Preferably, the panel, after execution of the rear grooves, advantageously in a single pass, the front grooves, recesses and holes, as well as the connectors on the longitudinal edges and the planing of the panel surfaces are performed.

Die Erfindung wird anschließend anhand eines in den beigelegten Zeichnungen schematisch dargestellten Ausführungsbeispieles eines vorzuziehenden erfindungsgemäßen, schallabsorbierenden Paneels näher erklärt, dabei erfüllen die Zeichnungen rein erklärenden, nicht begrenzenden Zweck.The invention will be explained in more detail with reference to an embodiment of a preferred, sound-absorbing panel according to the invention schematically illustrated in the accompanying drawings, while the drawings meet purely explanatory, non-limiting purpose.

Die Fig. 1 zeigt in perspektivischer Darstellung einen Teil eines erfindungsgemäßen schallabsorbierenden Paneels mit vorderen Rillen an der bei montiertem Paneel sichtbaren Fläche welche unterschiedliche Tiefe aufweisen und mit hinteren Rillen an der nicht sichtbaren Fläche welche die Form eines Kreissegmentes aufweisen.The Fig. 1 shows a perspective view of a part of a sound-absorbing panel according to the invention with front grooves on the panel visible on mounted panel which have different depth and with rear grooves on the non-visible surface which have the shape of a circle segment.

Die Fig. 2 zeigt die Vorderansicht des selben in Fig. 1 gezeigten schallabsorbierenden Paneels welches seitlich mittels Steckverbindung mit einem identischen nur teilweise dargestellten Paneels verbunden ist.The Fig. 2 shows the front view of the same in Fig. 1 shown sound-absorbing panel which is laterally connected by means of plug connection with an identical panel only partially shown.

Die Fig. 2a zeigt im Detail die Vorderansicht des extremen seitlichen Bereiches der Steckverbindung eines erfindungsgemäßen schallabsorbierenden Paneels wobei ein Bereich der hinteren nicht sichtbaren Fläche nahe an den hinteren Längskanten unbeschnitten ist und der Boden der hinteren Rillen in der Nähe der, zu den vorderen Längsrillen parallelen, Längsrändern des Paneels kreisbogenförmig verläuft und zwischen diesen Bereichen geradlinig verläuft.The Fig. 2a shows in detail the front view of the extreme lateral region of the connector of a sound-absorbing panel according to the invention wherein a portion of the rear invisible surface near the rear longitudinal edges is uncut and the bottom of the rear grooves in the vicinity of the longitudinal edges of the panel parallel to the front longitudinal grooves runs in a circular arc and runs straight between these areas.

Die Fig. 2b zeigt in Vorderansicht das Detail des extremen seitlichen, zu den vorderen Längsrillen parallelen, Bereiches eines erfindungsgemäßen schallabsorbierenden Paneels, wobei die hinteren Rillen, im Bereich der zu den vorderen Längsrillen parallelen Längskanten des Paneels, eine gewisse Tiefe aufweisen.The Fig. 2b shows in front view the detail of the extreme lateral, parallel to the front longitudinal grooves, region of a sound-absorbing panel according to the invention, wherein the rear grooves, in the region of the front longitudinal grooves parallel longitudinal edges of the panel, have a certain depth.

Die Fig. 3 zeigt einen Eckbereich eines erfindungsgemäßen Paneels welches an der Vorderseite parallele Längsrillen und an der Rückseite 45° angewinkelte Querrillen aufweist.The Fig. 3 shows a corner portion of a panel according to the invention which has parallel longitudinal grooves on the front and 45 ° at the rear angled transverse grooves.

Die Fig. 4 zeigt einen Eckbereich eines erfindungsgemäßen Paneels welches an der Vorderseite Bohrungen und an der Rückseite Querrillen aufweist wobei letztere mit den Längsseitenkanten des Paneels einen Winkel von 90° bilden.The Fig. 4 shows a corner portion of a panel according to the invention which has holes on the front and transverse grooves on the back side, the latter forming an angle of 90 ° with the longitudinal side edges of the panel.

Die Fig. 5 zeigt einen Eckbereich eines erfindungsgemäßen Paneels welches an der Vorderseite Bohrungen in Abwechslung mit Schlitzen und an der Rückseite Querrillen aufweist, wobei letztere mit den Längsseitenkanten des Paneels einen Winkel von 45° bilden.The Fig. 5 shows a corner portion of a panel according to the invention which has at the front holes in alternation with slots and on the back transverse grooves, the latter forming an angle of 45 ° with the longitudinal side edges of the panel.

Die Fig. 6 zeigt einen Eckbereich eines erfindungsgemäßen Paneels welches an der Vorderseite mit Längsrillen und mit Bohrungen versehen ist und an der Rückseite Querrillen aufweist welche mit den Längskanten des Paneels 45° bilden.The Fig. 6 shows a corner region of a panel according to the invention which is provided at the front with longitudinal grooves and with holes and at the back has transverse grooves which form 45 ° with the longitudinal edges of the panel.

Die Fig. 7 zeigt den Querschnitt durch ein erfindungsgemäßes Panel welches an der Vorderseite Längsrillen aufweist welche gegen einen oder den anderen Längsrand des Paneels geneigt sind und welches eine Rille aufweist welche sich im Inneren des Paneels in zwei V.-förmig angeordnete Rillen verzweigt welche beide mit den hinteren Querrillen mit kreisbogenförmigem Boden Verbindung haben.The Fig. 7 shows the cross section through a panel according to the invention which on the front longitudinal grooves which are inclined against one or the other longitudinal edge of the panel and which has a groove which branches in the interior of the panel in two V-shaped grooves which both with the rear transverse grooves have a circular arc ground connection.

Das Paneel aus Massivholz aus Lamellenholz oder aus einem vom Holz gewonnenem Werkstoff, wie z.B. aus Holzspänen oder Holzfasern, welches rechteckige Form und eine gewisse Stärke hat, ist an der sichtbaren oder vorderen Fläche A mit einer Reihe von Rillen 2, von Aussparungen 2b und oder von Bohrungen 9 welche zueinander parallel angeordnet sind versehen während es an der hinteren Fläche B hintere zueinander parallele Querrillen 1 welche zur Längsachse des Panels in einem Winkel von 90° oder geneigt angeordnet sind, aufweist; dabei haben diese die Form von Kreissegmenten wobei deren Sehne gleich der Breite der hinteren Fläche B ist und die Rillentiefe im mittleren Bereich des Paneels am größten ist. Die Tiefe der vorderen Rillen 2, Aussparungen 2b und/oder Bohrungen 9 ist derart bemessen dass, in den Bereichen der Überlagerung dieser mit den hinteren Rillen 1, freie Durchgänge 2a entstehen.The panel of solid wood of lamellar wood or of a wood-derived material, e.g. wood chips or wood fibers having a rectangular shape and a certain thickness is provided on the visible or front surface A with a series of grooves 2, recesses 2b and / or bores 9 which are arranged parallel to each other while on the rear surface B rear mutually parallel transverse grooves 1 which are arranged at an angle of 90 ° or inclined to the longitudinal axis of the panel; They have the shape of circle segments with their chord equal to the width of the rear surface B and the groove depth is greatest in the central region of the panel. The depth of the front grooves 2, recesses 2b and / or holes 9 is dimensioned such that, in the areas of superposition of these with the rear grooves 1, free passages 2a arise.

Die Geometrie der vorderen Rillen 2, Aussparungen 2b und/oder Bohrungen 9 bilden, zusammen mit den hinteren Rillen 1, in den beiden Längsrandbereichen zwischen dem Längsrand des Paneels und der entsprechenden ersten Rille 2, der Reihe von Aussparungen 2b und/oder der Reihe von Bohrungen 9, größere Paneelportionen 3, 3a, während die Querschnitte der Portionen 3b zwischen den besagten ersten Rillen 2, der Reihe von Aussparungen 2 und/oder der Reihe von Bohrungen 9 kleiner sind weil im entsprechenden Bereich die hinteren Rillen 1 tiefer sind.The geometry of the front grooves 2, recesses 2b and / or holes 9, together with the rear grooves 1, in the two longitudinal edge regions between the longitudinal edge of the panel and the corresponding first groove 2, the row of recesses 2b and / or the series of Holes 9, larger panel portions 3, 3a, while the cross sections of the portions 3b between said first grooves 2, the row of recesses 2 and / or the series of holes 9 are smaller because in the corresponding area, the rear grooves 1 are deeper.

Bei den in den Zeichnungen dargestellten Beispielen wird die Verbindung zwischen den Längsrändern der Paneele mittels einer Längsfeder 5 und einer entsprechenden Längsnute 4 hergestellt. Vorteilhafterweise sind die Flächen an der besagten Steckverbindung so ausgebildet dass im Bereich dieser eine Rille entsteht deren Breite jener der vorderen Rillen 2 entspricht; wobei die besagte Rille dadurch entsteht dass die seitliche Fläche 7 auf der Seite der sichtbaren Fläche A des Paneels, gegenüber der entsprechenden Fläche 6 auf der Seite der der hinteren Fläche B del Paneels, horizontal um das Maß der Breite der Rillen 2 verschoben ist; Auf der Seite der Nute 4 hingegen liegen die seitlichen Flächen 8 in einer einzigen vertikalen Ebene.In the examples shown in the drawings, the connection between the longitudinal edges of the panels is made by means of a longitudinal spring 5 and a corresponding longitudinal groove 4. Advantageously, the surfaces are at the said Plug connection formed so that in the region of this a groove is formed whose width corresponds to that of the front grooves 2; the said groove being formed by horizontally displacing the lateral surface 7 on the side of the visible surface A of the panel, opposite the corresponding surface 6 on the side of the rear surface B del panel, by the amount of the width of the grooves 2; On the side of the groove 4, however, lie the lateral surfaces 8 in a single vertical plane.

Erfindungsgemäß können die hinteren Rillen 1, im Bereich der Längskanten 1a derartige Tiefe und Form haben, dass die Kanten 1a nicht unterbrochen werden (Fig. 1, 2), dass außer der Kante 1a auch ein bestimmter Bereich 1b der hinteren Fläche B des Paneels 1 nicht unterbrochen wird (Fig. 2a) oder dass eine oder beide Kanten 1a durch die Schnitttiefe 1c (Fig. 2b) unterbrochen werden. In allen drei Fällen ist der Querschnitt der beiden Portionen 3, 3a des Längsrandbereiches des Paneels 1 immer größer in Bezug zu den Querschnitten der Portionen 3b welche sich zwischen den zwei vordere Rillen 2, zwischen den zwei Reihen von Aussparungen 2b und/oder zwischen den zwei Reihen von Bohrungen 9, nahe den entsprechenden Längsrändern des Paneels, erstrecken.According to the invention, the rear grooves 1, in the region of the longitudinal edges 1a, can have such a depth and shape that the edges 1a are not interrupted ( Fig. 1 . 2 ) that, in addition to the edge 1a, a certain area 1b of the rear face B of the panel 1 is not interrupted ( Fig. 2a ) or that one or both edges 1a through the depth of cut 1c ( Fig. 2b ) to be interrupted. In all three cases, the cross section of the two portions 3, 3a of the longitudinal edge region of the panel 1 is always larger with respect to the cross sections of the portions 3b which are between the two front grooves 2, between the two rows of recesses 2b and / or between the two Rows of holes 9, near the respective longitudinal edges of the panel, extend.

Die Erfindung schließt nicht aus, dass auch an den Stirnseiten des Paneels eine Steckverbindung vorgesehen ist, bzw. dass die Verbindung durch bekannte Verbindungselemente hergestellt wird welche aus dem Paneel selbst gearbeitet werden oder als eigene Elemente, wie z.B. Dübel, angebracht werden.The invention does not exclude that a plug-in connection is also provided on the end faces of the panel, or that the connection is produced by known connecting elements which are worked from the panel itself or as separate elements, such as e.g. Dowels to be attached.

Das Verfahren für die Herstellung des erfindungsgemäßen Paneels ist relativ einfach und mittels bekannter, weit verbreiteter, wartungsfreundlicher, funktionszuverlässiger Vorrichtungen durchführbar. Das Basisverfahren erfordert eine Kreissäge oder eine Scheibenfräsmaschine für des Schneiden der hinteren Rillen 1 mit linearer automatischer Zustellung welche, in Bezug auf die Rotationsachse das Sägeblatt oder die Scheibenfräse, betreffend die Schnitttiefe, einstellbar ist. Es ist nicht ausgeschlossen, dass mehrere Sägeblätter oder Scheibenfräsen auf eine einzige Welle montiert sind so dass gleichzeitig mehrere hintere Rillen1 oder auch alle hinteren Rillen 1 gleichzeitig geschnitten werden können. Im Falle von hinteren Rillen 1 mit teilweise geradlinig, parallel zu den Flächen A und B, verlaufendem Rillenboden ist es notwendig dass das Paneel oder die Welle der Fräsmachine oder der Säge, während des Schneidvorganges, seitlich geradlinig verschoben wird; im Falle eines geneigten Rillenbodens muss während der seitlichen Verschiebung gleichzeitig, gemäß einem gewissen Verhältnis, eine Veränderung der Schnitttiefe stattfinden. Im Falle von hinteren Rillen 1 mit wellenförmigem Rillenboden muss während der seitlichen Verschiebung eine zyklische Veränderung der Schnitttiefe stattfinden.The process for the manufacture of the panel according to the invention is relatively simple and practicable by means of known, widely used, maintenance-friendly, functionally reliable devices. The basic method requires a circular saw or a disc milling machine for cutting the rear grooves 1 with linear automatic feed which, with respect to the axis of rotation of the saw blade or the disc cutter, regarding the depth of cut, is adjustable. It is not excluded that several saw blades or disc milling on a single Shaft are mounted so that at the same time several rear grooves 1 or all rear grooves 1 can be cut simultaneously. In the case of rear grooves 1 with groove bottom extending partly rectilinearly, parallel to the surfaces A and B, it is necessary that the panel or the shaft of the milling machine or the saw, during the cutting process, is displaced laterally in a straight line; in the case of an inclined groove bottom, a change in the cutting depth must take place simultaneously during the lateral displacement, according to a certain ratio. In the case of the rear grooves 1 with corrugated groove bottom, a cyclic change of the depth of cut must take place during the lateral displacement.

Das selbe einzelne Sägeblatt oder die selbe Scheibenfräse kann erfindungsgemäß auch für das, zu den hinteren Rillen 1 parallele, Ablängen des Paneels verwendet werden. Im Falle von mehreren auf eine Welle montierte Sägeblätter oder Scheibenfräsen um gleichzeitig alle hinteren Rillen 1 auszuführen, können an der selben Welle am Ende und/oder am Anfang der Reihe von Sägeblättern oder Scheibenfräsen, ein Sägeblatt mit größerem Durchmesser vorgesehen sein so dass, während des Schneidens der Rillen 1, das Paneel abgelängt wird.The same single saw blade or the same disc milling machine according to the invention can also be used for cutting the panel parallel to the rear grooves 1. In the case of several shaft-mounted saw blades or disc cutters for simultaneous execution of all the rear grooves 1, a saw blade of larger diameter may be provided on the same shaft at the end and / or the beginning of the row of saw blades or disc milling, so that during the Cutting the grooves 1, the panel is cut to length.

Claims (7)

  1. Sound-absorbing panel of rectangular shape, produced from solid wood, from lamellar wood or from a material obtained from wood, which has cutouts on the two main surfaces, specifically on the front surface (A), which is visible when the panel is mounted, and on the non-visible surface (B), which cutouts have the form of front grooves, recesses and/or bores which are arranged with respect to the rear cutouts in such a way that overlapping regions or crossover regions result and which have such a depth that free passages result at these overlaps and crossings, wherein the cutouts on the rear surface (B) have the form of transverse grooves (1) which form an angle of 90° with respect to the longitudinal axis of the panel or arc inclined, and these rear transverse grooves (1) have the smallest depth in the region of the longitudinal edges (1a) of the two mutually opposite borders of the panel, wherein the cutouts (2, 2b, 9) provided on the front surface (A) which faces the sound source are arranged parallel to one another and along the longitudinal axis of the panel, characterized in that the depth of these front cutouts (2, 2b, 9) on the front surface (A) is sufficient in order to obtain free passages (2a) in the region of each overlap or crossing, between the front cutouts (2, 2b, 9) and the rear cutouts (1), which passages are situated in different planes, corresponding to the depth ot the rear grooves (1).
  2. Sound-absorbing panel according to Claim 1, characterized in that the front cutouts (2, 2b, 9) define longitudinal portions (3, 3a, 3b) of the panel, wherein the cross section of the portions (3, 3a) at the two longitudinal borders is greater than the cross section of the portions (3b) of the panel between the two aforementioned portions (3, 3a) at the two longitudinal borders.
  3. Sound-absorbing panel according to Claim 1, characterized in that both the cutouts (2, 2b, 9) which are provided on the visible surface (A) and those (1) which are provided on the non-visible surface (B) can have an identical or different width, or an identical or different diameter and an identical or different mutual spacing.
  4. Sound-absorbing panel according to Claim 1, characterized in that the bottom of the grooves (1) which are provided on the non-visible surface (B) has, in its entire longitudinal extent, the form of the arc of a circle or of another curve line.
  5. Sound-absorbing panel according to Claim 1, characterized in that the bottom of the grooves (1) which are provided on the non-visible surface (B) extends in a curved shape in the region of the two longitudinal borders of the panel whereas, in the central region of the panel, it extends in a straight line and parallel to the main surface (A, B), in a straight line at an angle to one of the said main surfaces (A, B) or in a wavy line.
  6. Sound-absorbing panel according to Claim 1, characterized in that the depth extent of the front visible grooves (2) can be perpendicular to the visible surface (A) of the panel or angled in the direction of one of the longitudinal borders.
  7. Sound-absorbing panel according to Claim 1, characterized in that the front visible grooves (2) have a v-shaped (2c) cross section, wherein they are visible as a single groove from the outside.
EP20100004905 2009-05-13 2010-05-10 Noise absorbing panel Not-in-force EP2251859B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITBZ2009A000024A IT1393908B1 (en) 2009-05-13 2009-05-13 SOUND-ABSORBING PANEL

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EP2251859A1 EP2251859A1 (en) 2010-11-17
EP2251859B1 true EP2251859B1 (en) 2014-06-25

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EP20100004905 Not-in-force EP2251859B1 (en) 2009-05-13 2010-05-10 Noise absorbing panel

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EP (1) EP2251859B1 (en)
IT (1) IT1393908B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU207372U1 (en) * 2021-04-20 2021-10-25 Акционерное Общество "Казанский Гипронииавиапром" имени Б.И. Тихомирова Sound absorbing sandwich panel

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018132969A1 (en) * 2018-12-19 2020-06-25 Eichhorn Verwaltungs Gmbh Acoustic panel

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1015972A (en) * 1950-04-05 1952-10-29 Device and industrial products for absorbing sound
CH683112A5 (en) * 1991-03-20 1994-01-14 Arthur Fries A disc-shaped element, in particular for sound absorption systems, and sound absorber system.
US20070193175A1 (en) * 2006-02-21 2007-08-23 Ta-Chung Hao Structure of decoration acoustic board
US7721847B2 (en) * 2007-03-27 2010-05-25 9 Wood, Inc. Acoustic panel

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU207372U1 (en) * 2021-04-20 2021-10-25 Акционерное Общество "Казанский Гипронииавиапром" имени Б.И. Тихомирова Sound absorbing sandwich panel

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IT1393908B1 (en) 2012-05-17
EP2251859A1 (en) 2010-11-17
ITBZ20090024A1 (en) 2010-11-14

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