EP2423410B1 - Building panel with improved locking means for detachable connection with building panels of the same kind - Google Patents

Description

• eine Sichtfläche,
• eine der Sichtfläche gegenüber liegende Basisfläche,
• zwei parallel zueinander liegende, profilierte erste Seitenflächen und zwei übrige, senkrecht zu den Seitenflächen verlaufende, ebenso zueinander parallele, profilierte zweite Seitenflächen, wobei alle Seitenflächen durch die Sichtfläche und Basisfläche begrenzt sind,
• wenigstens ein Paar von an den Seitenflächen des Baupaneels eingearbeiteten, zueinander kompatiblen und im Verlegezustand zusammenwirkenden Verriegelungsmitteln zur lösbaren Verbindung gleichartiger Baupaneele miteinander, wobei die an den Seitenflächen des Baupaneels befindlichen Verriegelungsmittel nach der Zusammenfügung mit gleichartigem Baupaneel eine formschlüssige Nut-Feder-Verbindung bilden,
  bei der das Verriegelungsmittel eine trapezförmige, sich in Richtung ihres Nutbodens verjüngende Nut umfasst, die eine im Wesentlichen parallel zur Sichtfläche verlaufende, erste (obere) Nutflanke, eine der ersten gegenüber liegende zweite (untere), geneigte Nutflanke aufweist, wobei die zweite Nutflanke über eine abgerundete Abstufung in eine gegenüber der besagten Nut abgesenkte, außerhalb des Verriegelungsmittels liegende Mulde übergeht, welche an einem über die Nut ragenden und in eine Lippe auslaufenden Schenkel angeordnet ist, wobei die Lippe durch eine plane Innenwand und eine freie, planparallel zur Basisfläche liegende Fläche begrenzt ist,
• und bei der das Verriegelungsmittel eine ebenso trapezförmige, in die Nut eingreifende Feder umfasst, die außerdem in einen auf die Basisfläche gerichteten, etwa halbrunden Vorsprung zur Unterbringung in der besagten Mulde übergeht, wobei der halbrunde Vorsprung sich an eine Aussparung anschließt, in die die Lippe eingreift.

The invention relates to a plate-shaped, rectangular building panel, comprising:

• a visible surface,
• one of the visible surface opposite base surface,
• two profiled first side surfaces lying parallel to one another and two remaining second side surfaces running perpendicular to the side surfaces and also parallel to one another, wherein all side surfaces are delimited by the visible surface and base surface,
• at least one pair of interlocking and interlocking locking means integral with each other on the side surfaces of the building panel for detachably connecting similar structural panels to each other, the interlocking means provided on the side surfaces of the building panel forming a positive tongue and groove joint when assembled with similar structural panels;
  in which the locking means comprises a trapezoidal groove tapering in the direction of its groove bottom, which has a first (upper) groove flank extending substantially parallel to the viewing surface, one of the first opposing second (lower) inclined flute, wherein the second groove flank merges via a rounded step into a recess, which is lowered relative to the said groove and lies outside the locking means, which recess is arranged on a leg protruding beyond the groove and terminating in a lip, wherein the lip is defined by a plane inner wall and a free, plane-parallel Base area lying surface is limited
• and wherein the locking means comprises an equally trapezoidal groove engaging spring which also transitions into a roughly semicircular projection directed towards the base surface for accommodation in said cavity, the semicircular projection joining a recess into which the lip intervenes.

A building panel, here: Floor panel, the type mentioned is from the EP 1585876 B1 the applicant known. The floor panels made according to the state of the art have proven themselves on the market well. The construction of the known floor panels ensures an unobstructed displacement in moisture-related dimensional changes in a direction perpendicular to the longitudinal side of the floor panel.

1. a) den Verriegelungsvorgang der beiden gleichartigen Kanäle zu erleichtern und
2. b) die Verschiebbarkeit der Paneele zueinander entlang ihrer Längsseiten zu reduzieren und gleichzeitig die Spannungen im Verbindungsbereich zu vermindern.

It will set the tasks,

1. a) facilitate the locking process of the two similar channels and
2. b) to reduce the displaceability of the panels to each other along their longitudinal sides and at the same time to reduce the stresses in the connection area.

• die Innenwand der Lippe einerseits bis zu einer der Mulde zugewandten und sich an die freie Fläche der Lippe anschließenden, gerundeten Gleitfläche und andererseits bis zu einer Muldenkante reicht,
• die Muldenkante den der Basisfläche nächst liegenden Bereich der Mulde begrenzt, von dem aus die Mulde von der Muldenkante ausgehend stetig bis zur abgerundeten Abstufung ansteigt,
• und bei welchem Baupaneel nach Einführung der Feder in die Nut der Vorsprung derart in der Mulde untergebracht ist, dass zwischen dem Vorsprung und einem Übergang der Innenwand zur Gleitfläche ein sich dem Nullwert annäherndes Spiel einstellt oder ein linearer Kontakt gebildet ist.

This object is achieved by a generic building panel according to the invention, in which

• the inner wall of the lip on the one hand to a trough facing and adjoining the free surface of the lip, rounded sliding surface and on the other hand reaches up to a trough edge,
• the trough edge delimits the region of the trough closest to the base surface, from which the trough rises steadily from the trough edge to the rounded step,
• and in which building panel after insertion of the spring into the groove, the projection is housed in the trough such that a zero-approaching clearance is established between the projection and a transition of the inner wall to the sliding surface or a linear contact is formed.

Thus, the technical effect is achieved that the locking process of two similar panels is facilitated and a reduction of the displaceability of the panels to each other along their longitudinal sides is achieved while reducing the internal stresses in the connection area.

In the following text, the term "building panel" is replaced by "floor panel"; However, the invention should also relate to wall or ceiling panels or furniture walls. As a floor panel is here understood a plate-shaped structure, which is characterized by a longitudinal side and a narrow side. The term "rounded sliding surface" can be understood as meaning a cylindrical sliding surface, but also a deviating geometric shape, for example a parabolic or elliptical shape.

The floor panels according to the invention may be made of wood, wood-based material, plastic or metal, in a solid, ie single-layered or multi-layered design. In addition, the floor panels can be made of solid wood or of so-called HDF laminate (high density fiberboard) or of MDF laminate (medium density fiberboard) or of other wood-based materials, including wood-material-plastic combinations.

The invention is particularly directed to versions made of wood. Hardwood floors are generally durable and resilient. Decisive feature of a wooden floor is the ability to absorb moisture and release it and as a result swell and dwindle. The wood material provides many positive features: air ionization, microclimate control indoors, protection against electrostatic charging and dusting. His antiallergic effect is known.

The inner wall of the lip may be arranged perpendicularly or obliquely relative to the base surface. Preferably, however, an oblique arrangement of the inner wall is selected, in which the inner wall is at an acute angle to a plane perpendicular to the base plane or at an obtuse angle (Complementwinkel) to the base surface.

The inner wall opposite gradation to the trough can be inside or outside a projection of the lateral groove on the base surface.

The slight play between the projection and the transition of the inner wall to the sliding surface basically occurs in a solid version of the floor panels made of solid wood. This is due to the fact that the running in the longitudinal direction of the floor panel wood fibers are subject to the greatest swelling in moisture. The game may have a value between 0.01 mm and 0.20 mm, preferably between 0.12 and 0.15 mm with a panel thickness of 14 mm.

In contrast, the linear contact - instead of the game - occurs in multi-layer, in the present case three-layer floor panels, because the dimensional increase is not the same, but different for all three layers. The summary measure increase in the case of moisture and temperature-related volume changes, the size of the massive floor panels is smaller. This refers to the earlier documents EP 1 585 876 B1 and DE 203 21 445 U1 the applicant, the disclosure of which is to be fully incorporated into the present invention.

The wood fibers of the upper and lower layers (wear layer and ground layer) are basically parallel, whereas those of the middle layer (core layer) are perpendicular to the longitudinal side of the floor panel. As a result, the swelling of the upper and lower layers occurs perpendicular to the longitudinal side, both in the plane of the plate and perpendicular to the plane of the plate.

The swelling of the core layer occurs perpendicular to the longitudinal side, but in a direction perpendicular to the base plane and parallel to the longitudinal side in the plane of the plate. The latter source direction has practically no influence on dimensional changes of the panel connection. The elongated fiber arrangement of the core layer with respect to the source direction of the useful and bottom layers effectively inhibits the swelling force of these two layers.

The shape of the lip cross-section is selected so that the height dimension of the lip, measured from the base surface, approximately corresponds to a height at which a transition of the gradation is to the groove flank.

The trough may be flat and / or arcuate. Preferably, the trough is divided into two part-circular regions, of which the area close to the inner wall has a radius which is equal to a radius of the sliding surface. The other area of the trough has a radius that exceeds the value of the other radii.

It is particularly advantageous that the contact surface of the projection with the trough or the transition point of the inner wall is limited to the sliding surface to the said linear contact. As a result, the mobility of the floor panels is significantly improved both during and after their installation.

It is advantageous that the stresses normally occurring at least on the long sides of the new panel construction and the possible concave bulges on the wear layer in the region of the abutting surfaces can be avoided or greatly limited.

• Amerikanischer Ahorn
• Amerikanischer Kirschbaum (black cherry)
• Amerikanischer Nussbaum
• Bambus hell
• Birke
• Birnbaum
• Bubinga
• Buche
• Cabreuva
• Cumaru
• Diamantholz (Guatambu)
• Doussie (afzelia superior)
• Eiche
• Erle
• Esche
• Eukalyptus
• Europäischer Ahorn (Bergahorn)
• Europäischer Kirschbaum
• Hevea
• Ipe
• Iroko
• Jatoba
• Kempas
• Lärche
• Mahagoni
• Merbau
• Mutenye
• Niangon
• Padouk
• Palisander
• Peroba
• Pitch Pine
• Red Pine
• Sucupira
• Tali-Missanda
• Teak
• Tigerwood
• Wenge (Panga-Panga)

For the floor panel according to the invention, inter alia, the following native, but also particularly resistant tropical wood species come into question:

• American maple
• American cherry tree (black cherry)
• American walnut
• Bamboo bright
• birch
• pear tree
• Bubinga
• beech
• Cabreuva
• Cumaru
• Diamond wood (Guatambu)
• Doussie (afzelia superior)
• Oak
• alder
• ash-tree
• eucalyptus
• European maple (sycamore maple)
• European cherry tree
• Hevea
• Ipe
• Iroko
• Jatoba
• Kempas
• larch
• mahogany
• Merbau
• Mutenye
• Niangon
• Padouk
• jacaranda
• peroba
• Pitch Pine
• Red pine
• sucupira
• Tali-Missanda
• teak
• Tiger Wood
• Wenge (Panga Panga)

Timbers from responsible and sustainable forestry are identified by the FSC (Forest Stewardship Council) seal and are preferred for implementation.

The Brinell hardness of the above listed species is between 43 N / mm ² (sycamore) and 90 N / mm ² (sucupir).

Finally, the invention also relates to a surface made of assembled building panels of the type mentioned above. The surface covering may be a floor, a wall or ceiling cladding, a facade cladding or a furniture wall.

Fig. 1

ein Fußbodenpaneel gemäß Erfindung, in einer Draufsicht auf seine Flachseite;

Fig. 2

einen Schnitt A-A gemäß Fig. 1;

Fig. 3

ein vergrößertes Detail der an der Längsseite verlaufenden und in Fig. 2 dargestellten Seitenfläche mit Nut, in einem Schnitt;

Fig. 4

ein vergrößertes Detail zweier mehrschichtigen Fußbodenpaneele im Bereich ihrer länglichen Seitenflächen nach der Zusammenfügung, in einem Schnitt;

Figuren 5 bis 7

jeweils ein vergrößertes Detail einer anderen Variante der in Fig. 3 dargestellten Seitenfläche mit Nut und zurückversetzter Abstufung zur Mulde, in einem Schnitt;

Fig. 8a

ein vergrößertes Detail zweier mehrschichtigen Fußbodenpaneele nach deren Zusammenfügung, in einem Schnitt;

Fig. 8b

ein vergrößertes Detail zweier massiven Fußbodenpaneele nach deren Zusammenfügung, in einem Schnitt;

Fig. 9

einen Schnitt B-B gemäß Fig. 1;

Figuren 10 und 11

vergrößertes Detail zweier mehrschichtigen Fußbodenpaneele im Bereich ihrer Schmalseiten vor und nach der Zusammenfügung, in einem Schnitt;

Fig. 12

die in Fig. 11 gezeigten Fußbodenpaneele während deren Verlegung, in einer perspektivischen Ansicht.

Embodiments of the invention are explained in more detail with reference to the drawing. The drawing and the details of the figures contain important information that will become apparent to those skilled in the art from the perspective of the drawings. The figures show:

Fig. 1

a floor panel according to the invention, in a plan view of its flat side;

Fig. 2

a section AA according to Fig. 1 ;

Fig. 3

an enlarged detail of the running on the longitudinal side and in Fig. 2 illustrated side surface with groove, in a section;

Fig. 4

an enlarged detail of two multilayer floor panels in the region of their elongated side surfaces after assembly, in a section;

FIGS. 5 to 7

each an enlarged detail of another variant of in Fig. 3 Side surface shown with groove and recessed gradation to the trough, in a section;

Fig. 8a

an enlarged detail of two multilayer floor panels after their assembly, in a section;

Fig. 8b

an enlarged detail of two massive floor panels after their assembly, in a section;

Fig. 9

a section BB according to Fig. 1 ;

FIGS. 10 and 11

enlarged detail of two multilayer floor panels in the area of their narrow sides before and after assembly, in a section;

Fig. 12

in the Fig. 11 shown floor panels during their installation, in a perspective view.

• Die "Sichtfläche", auch Trittfläche genannt, entspricht der sich nach der Verlegung ergebenden Oberseite der Fußbodenpaneele bzw. deren Nutzschicht;
• Die "Basisfläche" entspricht einer der Sichtfläche gegenüberliegenden Unterseite des Fußbodenpaneels;
• "Stoßfläche" bzw. "Stoß" bezieht sich in vorliegendem Fall auf zwei senkrecht zur Sicht- bzw. Basisfläche gerichtete, miteinander in Kontakt stehende Flächen der Seitenflächen, insbesondere der Nutzschicht;
• "Gegenpaneel" bezieht sich auf das Fußbodenpaneel, das mit dem anderen zusammenwirkt und sich durch denselben Aufbau auszeichnet. Im vorliegenden Fall sind die Gegenpaneele mit Bezugszeichen 100', 200' und 300' bezeichnet.
• "Seitenfläche" ist die durch die Sicht- und Basisflächen begrenzte und von deren Kanten ausgehende Fläche des Fußbodenpaneels.

For better understanding of the embodiments, the following terms are explained as used in connection with the drawings:

• The "visible surface", also called tread, corresponds to the resulting after laying top of the floor panels or their wear layer;
• The "base surface" corresponds to an underside of the floor panel opposite the visible surface;
• "Impact surface" or "impact" refers in the present case to two perpendicular to the visual or base surface directed, mutually contacting surfaces of the side surfaces, in particular the wear layer;
• "Counter panel" refers to the floor panel that interacts with the other and is characterized by the same construction. In the present case, the counter panels are designated by reference numerals 100 ', 200' and 300 '.
• "Side surface" is the surface of the floor panel bounded by the visible and base surfaces and extending from their edges.

Terms such as "top", "top", "bottom", "bottom", "bottom", "below", "above", "left", right "etc. refer to the floor panels laid on a horizontal surface, as these are also shown in the drawing.

Fig. 1 shows a rectangular floor panel 100, 100 'and 200, 200' in a schematic plan view of its visible surface 11. The floor panel 100, 100 'or 200, 200' has two mutually parallel side surfaces 1.1, 2.1 and two perpendicular to the side surface 1.1, 2.1 lying side surfaces 1.2, 2.2, wherein the side surfaces 1.1, 2.1 are arranged on the longitudinal sides and the remaining side surfaces 1.2, 2.2 on the narrow sides of the floor panel.

The details of the side surfaces 1.2, 2.2; 1.2, 2.2 are the Fig. 1 due to their schematic representation not removable. They will be dealt with by further figures of the present description. So includes the Fig. 1 two mutually different embodiments of the floor panels. The differences between the embodiments only affect the longitudinal sides of the floor panels.

The floor panel 100, 100 'is in FIGS. 2, 3 and 4 shown in more detail. Thus, the lying on the longitudinal sides side surfaces 1.1, 2.1 locking means 9; 19 on, the one in Fig. 4 form illustrated tongue and groove connection 40.

According to Fig. 2 the floor panel 100, 100 'consists of three layers, namely a lower bottom layer 7, an upper wear layer 5 with the visible surface 11 and a middle core layer 3. Furthermore, the shows Fig.2 a schematic arrangement of swelling directions QR1, QR2, QR3 and QR4.

The wood fiber of useful and soil layer 5; 7 run parallel to the longitudinal side of the floor panel (in Fig. 2 not visible). The source direction QR1 is indicated by arrows perpendicular to the longitudinal side. The source direction QR2 show directed perpendicular to the visual or base area arrows.

The core layer 3 schematically shows wood fibers 23 extending perpendicularly to the longitudinal side. The source direction perpendicular to the longitudinal side and the base surface 12 is shown by QR3. The obliquely extending source direction QR4 is indicated by obliquely shown arrows. The source direction QR4 corresponds to the course of the long side, ie parallel to the plate plane and is in Fig. 2 designated as point P.

The side surface 2.1 comprises, starting from the visible surface 11, an abutment surface 28.1, a groove 13 and a lower leg 4 protruding beyond the abutment surface 28.1 and ending with an upwardly pointing lip 8.

On the leg 4, a trough 10 can be seen, which connects on the one hand to an inner wall 21 of the lip 8 and on the other hand to a gently rounded step 17, which in turn merges into a lower, oblique groove flank 25 of the groove 13. A free, upper surface 44 of the lip 8 passes over a circular sliding surface 20 in the said inner wall 21 on. An upper, second groove flank 15 of the groove 13 lies parallel to the visible surface 11. The groove 13 thus has the shape of an orthogonal trapezium and therefore tapers in the direction of its groove bottom 14.

The locking means 19 comprises a trapezoidal spring 24 projecting beyond an abutment surface 28. 2, which in turn continues into a downward-pointing, semicircular projection 26. In assembled condition according to Fig. 4 However, the projection 26 is supported at a transition 18 of the inner wall 21 to the sliding surface 20 from such that there is a linear contact 41 is formed, which is formed in Fig. 4 can be seen as a point.

The impact surface 28.1 (see. Fig. 3 ) ends with a lower chamfer 45 in the region of the wear layer 5. The chamfer 45 leads to a rounding 46, which in turn adjoins the upper groove flank 15.

The Fig. 5 shows a floor panel 200 and 200 'in the region of its side surface 2.1, which differs from the first embodiment according to Figure 3 differs by arranging the gradation 17. The gradation 17 is placed in front of a plane E1, which is defined as a continuation of the impact surface 28.1 down. Furthermore, the Fig. 5 can be seen that the inner wall 21 is arranged obliquely opposite the base surface 12.

According to Fig. 6 the inner wall 21 is at an acute angle β to a plane E2, which is defined by the transition 18 of the sliding surface 20 to the inner wall 21 and parallel arrangement to the already described plane E1. The angle β is in the present case 18 °.

According to Fig. 6 For example, the lip 8 has a height dimension H1 which corresponds approximately to a height H2 on which a transition 31 of the step 17 to the groove flank 25 is arranged. Furthermore, the Fig. 6 to take a chamfer 22 or bevel on the abutment surface 28.1, which adjoins the upper groove flank 15.

The Fig. 7 shows the divided into two part-circular areas L1, L2 trough 10. The area L1 has a radius R2 which corresponds to a radius R1 of the sliding surface 20 and is smaller than a radius R3 of the larger region L2.

The assembled floor panels 200, 200 'are in Fig. 8a shown. The lip 8 is housed within a recess 27 of the Gegenpaneels, wherein the lower projection 26 of the spring 24 similar to the embodiment according to Fig. 4 forms with the trough 10, the game 29 and at the transition 18 of the inner wall 21 to the sliding surface 20, the linear contact 41. Furthermore, in a lowermost region 43 of the trough 10, a trough edge 42 is visible as a point. In particular, it is visible that the trough 10 despite partially circular areas L1, L2 (see. Fig. 7 ) steadily increases until gradation 17.

In Fig. 8b are solid floor panels 300, 300 'made of wood before and after the introduction of the spring 24 in the groove 13. With a dash-dotted line, the floor panel 300 is shown in its inclined position, in which the spring 24 slides with its lower beveled edge 47 over the gently rounded step 17. In this position, the lower projection 26 is still supported on an edge 48, which is formed by the upper surface 44 of the lip 8 and the sliding surface 20. If the spring 24 pushed deeper into the groove 13, and the round projection 26 slides over the sliding surface 20 and decreases in the direction of trough 10 in such a way until there the game play 29 is created. However, there is also another clearance 30 between the projection 26 and the transition 18 of the sliding surface 20 to the inner wall 21. The clearance 30 has a maximum value of 0.14 mm with a panel thickness of 14 mm.

The Fig. 9 shows the already described floor panel 100 or 100 '(also applies to the floor panel 200, 200') in section BB according to Fig. 1 , The three-layer floor panel 100 (100 ') has a further locking means 6 (left side of the figure) in the form of a arranged on the side surface 1.2, trapezoidal head piece 48 and an adjacent to the head piece 48, groove-shaped recess 49 which is bounded by a lip 51.

As the Fig. 10 shows, the head piece 48 has a plane-parallel to the base surface 12 extending trapezoidal base surface 35 and two adjoining the trapezoidal base surface, oblique side walls 36, 56. The outer side wall 36 of the head piece 48 merges into a step 38.2 of an abutment surface 64.2. The recess 49 has a perpendicular to the base surface 12 directed edge 65, which lies opposite the side wall 56 of the head piece 48.

Accordingly, the recess 49 has the shape of an orthogonal trapezoid whose bottom 67 is wider than a clear width 66 of the recess 49. In addition, the head piece 48 is chamfered on both sides (not shown) in its lowermost region in order to facilitate insertion into a groove 34 of the counter panel ).

The second side surface 2.2 (see right side of FIG Fig. 9 ) comprises a locking means 16 compatible with the locking means 6, which carries a locking arm 33 projecting over an abutment surface 64.1 of the floor panel, which terminates in the trapezoidal lip 51 projecting upwards.

The open groove 34 is milled out on the locking arm 33. The groove 34 has a groove bottom 39 arranged parallel to a base surface 12 of the floor panel and two groove flanks 52.1, 52.2 inclined in such a way that the groove 34 tapers upwards. This is followed by the groove flank 52.1 a gradation 38.1 of the abutting surface 64.1. The groove 34 is formed as a nearly isosceles trapezoid.

The two gradations 38.1, 38.2 are parallel to the base surface 12 of the floor panel and are slightly offset by the fact that the height dimension of the abutment surface 64.1 projects slightly beyond the height dimension of the abutment surface 64.2.

In assembled state (cf. Fig. 11 ) is a positive tongue and groove connection 50 (dovetail connection) is formed, in which the groove flanks 52.1, 52.2 press against the side walls 36, 56 of the head piece 48. However, between the two gradations 38.1, 38.2 a game 37 and between the trapezoidal base surface 35 and the groove bottom 39 another game 60th

The size of the game 37 as well as the second game 60 approximates to zero as the wood material swells.

The task of the two games 37 and 60 is to compensate for the dimensional changes of the laid floor panels. The gradations 38.1, 38.2 stabilize the resulting dovetail connection 32 perpendicular to the visible surface 11 and secure the abutment surfaces against the destructive pressure with moisture-related dimensional changes of the wood-based material. The dimensions of the game 37 and the game 60 are small and are in the present case between 0.1 mm and 0.2 mm.

The Fig. 12 shows a mounting of the massive floor panels 300, 300 'on the narrow side. When pivoting down of the floor panel 300 'about a pivot axis X, the head piece 48 is pressed into the groove 34 of the Gegenpaneels until it to form-fitting tongue and groove connection 50 (as in Fig. 11 ) comes. The pivot axis X extends parallel to the longitudinal side of the floor panels and is defined by their cooperating parts, namely by the lower semicircular projection 26 of a floor panel and the sliding surface 20 of the Gegenpaneels. The pivot axis X does not necessarily represent a straight line in the geometric Meaning, it can also be referred to as Schwenkachsenbereich.

LIST OF REFERENCE NUMBERS

1.1, 2.1

side surface

1.2, 2.2

side surface

3

core layer

4

leg

5

wear layer

6; 16

locking means

7

soil layer

8th

lip

9; 19

locking means

10

trough

11

viewing area

12

footprint

13

groove

14

groove bottom

15

flank

17

gradation

18

crossing

20

sliding surface

21

inner wall

22

bevel

23

wood fiber

24

feather

25

flank

26

Lead (by 24)

27

recess

28.1, 28.2

abutting face

29

game

30

game

31

crossing

32

dovetail joint

33

lock

34

Groove (v. 33)

35

Trapezoidal base area

36

Sidewall (by 48)

37

game

38.1, 38.2

gradation

39

Groove bottom (v. 34)

40

Tongue and groove

41

contact line

42

trough edge

43

Range (v. 10)

44

Area (v. 8)

45

bevel

46

rounding off

47

Edge (v. 24)

48

headpiece

49

recess

50

Tongue and groove

51

Lip (v. 33)

52.1, 52.2

flank

56

Sidewall (by 48)

60

game

64.1, 64.2

abutting face

65

flank

66

clear width

67

Soil (v. 49)

100, 100 '

Building panel (floor panel)

200; 200 '

Building panel (floor panel)

300; 300 '

Building panel (floor panel)

β

angle

E1

level

E2

level

H1, H2

height dimension

L1, L2

Area

P

Point (by QR4)

QR1, QR2

source direction

QR3, QR4

source direction

X

swivel axis

Claims (16)

1. Panel-shaped, rectangular construction panel (100; 200; 300), comprising:

   - a visible surface (11),

   - a base surface (12) opposite the visible surface (11),

   - two profiled first side surfaces (1.1, 2.1) which lie in parallel with each other, and two other profiled second side surfaces (1.2, 2.2) which also lie in parallel with each other and extend perpendicular to the side surfaces (1.1, 2.1), wherein all side surfaces (1.1, 2.1; 1.2, 2.2) are defined by the visible surface (11) and the base surface (12),

   - at least one pair of locking means (9, 19) which are incorporated in the side surfaces (1.2, 2.2) of the construction panel, are compatible with each other and co-operate in the laid condition, for releasable mutual connection of like construction panels,

   wherein the locking means (9, 19) located on the side surfaces (1.1, 2.1) of the construction panel create a positive-locking tongue and groove connection (40) when fitted together with a like construction panel,

   - in which one locking means (9) comprises a trapezoidal groove (13) which tapers in the direction of its groove bottom (14) and has a first groove flank (15), which extends substantially in parallel with the visible surface (11), and a second, inclined groove flank (25) opposite the first groove flank, wherein the second groove flank (25) merges via a rounded step (17) into a depression (10) which is lower than the said groove (13), lies outside the locking means (9) and is disposed on a limb (4) which protrudes beyond the groove (13) and runs out into a lip (8), wherein the lip (8) is defined by a planar inner wall (21) and a free surface (44) which is plane-parallel with the base surface (12),

   - and in which the other locking means (19) comprises a tongue (24) which is also trapezoidal and engages into the groove (13) and which additionally merges into an approximately semicircular projection (26) which is oriented toward the base surface (12) and is to be accommodated in the said depression (10), wherein the semicircular projection (26) adjoins a recess (27) into which the lip (8) engages,

   characterised in that:

   - the inner wall (21) of the lip (8) extends, on one hand, to a rounded slide surface (20) facing the depression (10) and adjoining the free surface (44) of the lip (8), and, on the other hand, to a depression edge (42),

   - the depression edge (42) defines the region (43) of the depression (10) which lies nearest to the base surface (12), from which region the depression (10), starting from the depression edge (42), rises steadily to the rounded step (17),

   - and, after the tongue (24) has been inserted into the groove (13), the projection (26) is accommodated in the depression (10) in such a way that there is clearance (30) approaching zero between the projection (26) and a transition (18) from the inner wall (21) to the slide surface (20), or a linear contact (41) is formed.
2. Construction panel as claimed in claim 1, characterised in that the inner wall (21) is disposed perpendicularly or obliquely with respect to the base surface (12).
3. Construction panel as claimed in claim 1, characterised in that the step (17) is located between the depression (10) and a plane (E1) which extends perpendicular to the visible surface (11) and is defined as a continuation of an abutment surface (28.1) of the construction panel.
4. Construction panel as claimed in claim 1 to 3, characterised in that the inner wall (21) is disposed at an acute angle (β) with respect to a plane (E2) which is defined by the transition (18) from the slide surface (20) to the inner wall (21) and parallel arrangement with respect to said plane (E1).
5. Construction panel as claimed in claim 4, characterised in that the angle (β) is between 1° and 45°, preferably between 16° and 20°, in a particularly preferred manner has an angular value of 18° with an angular tolerance of ± 0.5°.
6. Construction panel as claimed in claim 1, characterised in that the clearance (30) has a value between 0.01 mm and 0.20 mm.
7. Construction panel as claimed in claim 6, characterised in that the clearance (30) is a maximum of 0.14 mm.
8. Construction panel as claimed in claim 1 and 5, characterised in that the linear contact (41) occurs at the transition (18).
9. Construction panel as claimed in claim 1, characterised in that the lip (8) has a height dimension (H1) which approximately corresponds to a height (H2) at which a transition (31) from the step (17) to the groove flank (25) is located.
10. Construction panel as claimed in claim 1, characterised in that the depression (10) is divided into two partially circular regions (L1, L2), the region (L1) of which has a radius (R2) which equals a radius (R1) of the slide surface (20).
11. Construction panel as claimed in claim 10, characterised in that the region (L2) of the depression (10) has a radius (R3) which exceeds the value of the radius (R2).
12. Construction panel as claimed in any one of the preceding claims, characterised in that the construction panel is solid.
13. Construction panel as claimed in any one of the preceding claims, characterised in that the construction panel has multiple layers.
14. Construction panel as claimed in any one of the preceding claims, characterised in that the construction panel is a wall, ceiling, or floor panel.
15. Construction panel as claimed in any one of the preceding claims, characterised in that the construction panel is a furniture panel.
16. Surface covering consisting of construction panels as claimed in any one of claims 1 to 13, fitted together.

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