Panel

Abstract

The invention relates to a panel (1, 2, 3, 4) with a panel core (9), a panel top (7), a panel bottom (8), and with a first pair of edges and a second pair of edges, wherein the first pair of edges is provided with a groove profile (5) on one panel edge (N) and a complementary spring profile (6) on the opposite panel edge (F), which can be locked by a pivoting movement (S) and then interact in such a positive-locking manner that, in the locked state, a vertical locking effect can be achieved and a movement apart of locked panels (1, 2, 3, 4) in the plane of the panels (horizontally) is counteracted, wherein the second pair of edges is provided on its opposite panel edges with complementary hook profiles, namely a receiving hook (10, 56, 62, 69, 74) and a locking hook (11, 57, 63, 68, 75), wherein the locking hook (11, 57, 63, 68,75) can be joined by a joining movement in a plane perpendicular to the panel plane simultaneously by means of the pivoting movement (S) for the first pair of edges with the receiving hook (10, 56, 62, 69, 74), provided that the receiving hook (10, 56, 62) is provided with a retaining groove (12, 58, 64) or the locking hook (68, 75) is provided with a retaining groove (71, 77) for a separate locking element (70, 76) with which a vertical locking effect can be achieved, wherein a buttress surface (10a) is arranged substantially orthogonally on the receiving hook (10, 56, 62, 69, 74) relative to the upper surface of the panel (7), and that a counter-buttress surface (11d) is arranged on the locking hook (11, 57, 63, 68, 75) relative to the The upper surface of the panel (7) is arranged substantially orthogonally, such that at the second pair of edges at a lower end of the counter-surface (11d) of the locking hook (11, 57, 63, 68, 75) or at a lower end of the impact surface (10a) of the receiving hook (10, 56, 62, 69,74) at least one sealing lug (51) is provided which extends parallel to the respective panel edge (M, U) over the entire length of the counter-surface (11d) or the buttress surface (10a).

Description

[0001] The invention relates to a panel with a panel core, a panel top side, a panel bottom side, and a first pair of edges and a second pair of edges, wherein the first pair of edges is provided with a groove profile on one panel edge and a complementary tongue profile on the opposite panel edge, which can be locked by a pivoting movement and then interact in such a form-fitting manner that, in the locked state, a vertical locking effect can be achieved and a movement apart of locked panels in the plane of the panels (horizontally) is counteracted, wherein the second pair of edges is provided on its opposite panel edges with complementary hook profiles, namely a receiving hook and a locking hook, wherein the locking hook can be joined to the receiving hook by a joining movement in a plane perpendicular to the panel plane, simultaneously by means of the pivoting movement for the first pair of edges,with the proviso that the receiving hook is provided with a retaining groove for a separate locking element with which a vertical locking effect can be achieved.

[0002] A generic panel is known from EP 1 415 056 B1. It comprises a first pair of edges with a tongue-and-groove profile and a second pair of edges with hook profiles. This allows the known panel to be locked to the groove profile of the panels of a previous row of panels by means of a pivoting movement on an edge with a tongue profile. A major advantage is that, by means of the aforementioned pivoting movement, one of the edges with a hook profile is also locked simultaneously. The separate locking element engages automatically. The locking function of the locking element is automatically triggered by the aforementioned pivoting movement on the first pair of edges of the panel.

[0003] This type of installation is also known as fold-down installation or the suitable panel as a fold-down panel.

[0004] Such panels are connected to one another in rows, resulting in transverse joints between the panels within a row of panels. In addition, longitudinal joints form between the rows of panels in a covering surface formed in this way. It is desirable that the longitudinal and transverse joints of such a covering surface should have a certain degree of impermeability to water. In practice, it has unfortunately been found that water can penetrate into joints and, in some places, flow from the top of the panel through the joint to the underside of the panel. Water penetrating or flowing in this way can lead to the formation of mold, which can spread hidden beneath a covering surface. It has been shown that moisture can penetrate or flow through the transverse edges and the intersection points of the transverse and longitudinal edges in particular.

[0005] The invention is based on the object of proposing a panel which has an improved design of at least the

[0006] Profiles of the second pair of edges to better counteract the passage of water at the joints.

[0007] According to the invention, the object is achieved in that an abutment surface is arranged on the receiving hook substantially orthogonally relative to the panel top side, in that a counter-abutment surface is arranged on the locking hook substantially orthogonally relative to the panel top side, in that on the second pair of edges at a lower end of the counter-abutment surface of the locking hook or at a lower end of the abutment surface of the receiving hook a sealing nose is provided, which extends parallel to the respective panel edge over the entire length of the counter-abutment surface or the abutment surface.

[0008] The sealing nose protrudes at the panel edge in a distal direction from the abutment surface of the receiving hook or in a distal direction from the counter-abutment surface of the locking hook. The cross-section of the sealing nose expediently has an outer contour composed of rounded and / or curved sections. A distal end of the curved or rounded sealing nose has an inflection point, or an inflection point tangent. The inflection point tangent is arranged relative to the panel top side at an angle between ≥ 30° and ≤ 90°, preferably ≥ 45° and ≤ 90°, in particular ≥ 60° and ≤ 90°. The inflection point tangent is preferably applied at the inflection point distally furthest from the panel core.

[0009] The proposed panel is equipped with a sealing measure that is physically located in the area below the recessed joint and above the point of action for the vertical locking effect. This is the sealing nose provided on the counter-butt surface, which, when locked, creates a sealing effect together with the butt surface. Sealing can be achieved by pressing the sealing nose against the butt surface and / or, in the presence of moisture, by swelling the sealing nose, because then, at the very latest, the swelling process causes it to expand and come into sealing contact with the butt surface.

[0010] A further measure that contributes to sealing can be achieved if at least one of the edge pairs has an edge break on its two complementary panel edges, which forms a recessed joint when two of these panels are joined together.

[0011] Advantageously, the edge refractions of at least one of the edge pairs of the complementary panel edges are each provided with a larger edge refraction and a smaller edge refraction, wherein in the joined state the larger edge refraction is covered by the smaller edge refraction.

[0012] The cross-section of the retaining groove for the separate locking element can be easily retained and a known locking element can be used. Suitable locking elements are known, for example, from EP 1 415 056 B1, WO 2011 / 087425 A1, US 9,347,469 B2, or US 7,866,110 B2. Reference is hereby made to the design examples for separate locking elements and their arrangement on a panel, as defined in the aforementioned publications, and this technical teaching is incorporated herein. The separate locking element for the complementary hook profiles can optionally be provided as a component of the panel. It is then preferably pre-assembled in the retaining groove of the receiving hook.

[0013] The proposed panel has a rectangular basic shape. At one of the four corners of the panel, the tongue profile of the first pair of edges meets the receiving hook of the second pair of edges. These two different shapes of the panel edges intersect at this corner, creating an overlap zone of the different profile shapes, resulting in a complex three-dimensional shape. The complex shape arises from the fact that the receiving hook must have the retaining groove for the locking element, and this retaining groove therefore intersects with the tongue profile of the adjacent panel edge of this corner. To create the retaining groove, material from the panel core must be removed, for example, by milling. The milling of the retaining groove runs through the tongue profile at one end (transition zone) and machines part of the panel core that formed the tongue. Part of the material of the tongue profile is therefore machined and removed.A gap is created at the top of the spring in this transition zone, through which no water is allowed to penetrate. Therefore, the proposed design follows the technical approach of providing suitable measures above the top of the spring that effectively prevent water from penetrating down to the level of the top of the spring. It has been shown that this approach achieves better watertightness against passing water.

[0014] The complementary hook profiles of the second pair of edges, namely the upwardly open receiving hook and the downwardly open locking hook, advantageously have retaining surfaces integrally provided on both sides of the panel core, by means of which the locking effect can be achieved, preventing the panels from moving apart within the panel plane in a direction perpendicular to the locked panel edges. The locking effect in the vertical direction perpendicular to the panel top is particularly user-friendly and easily achieved using the separate locking element.

[0015] Advantageously, the carrier board underlying a panel according to the invention comprises a fiber material, such as a high-density fiber material (HDF) or a medium-density fiber material (MDF), an OSB (oriented strand board) or a wood-plastic composite material (WPC). It can also be provided that the panel has a decoration, whereby this decoration is formed either by applying a pre-printed decorative layer to a carrier board or by directly printing the carrier board with such a decoration. In this case, direct printing also includes printing on a printing substrate previously applied to a carrier board. It can also be provided that the panel consists of solid wood or is formed entirely from a wood-based material. Advantageously, such a fiber material can absorb water or liquid upon contact with moisture, which leads to swelling.Such swelling leads to an improved seal in the area of the sealing nose or the abutting surface and the counter-abutting surface. In a further embodiment of the invention, the carrier plate underlying a panel according to the invention comprises a plastic material, such as a polypropylene (PP), polyethylene (PE), polyethylene terephthalate (PET), an acrylonitrile-butadiene-styrene copolymer (ABS), a polyvinyl chloride (PVC), a polycarbonate (PC), a polyamide (PA), a polyether ketone (PEK), polyetheretherketone (PEEK), mixtures or copolymers thereof, or a plastic composite material made of one or more of these plastics with a fiber and / or mineral filler.

[0016] Furthermore, an improvement in the tightness can be achieved by providing a projection on the panel edge with the smaller edge refraction, on the upper side of which at least a part of the smaller edge refraction extends, and by providing an undercut counter surface for the covered part of the larger edge refraction on an underside of the projection.

[0017] It is expedient that the smaller edge refraction of the first edge pair is arranged on the groove profile and the larger edge refraction on the tongue profile and that the smaller edge refraction of the second edge pair is arranged on the locking hook and the larger edge refraction on the receiving hook.

[0018] Furthermore, it is helpful to improve sealing if the abutment surface on the receiving hook is arranged orthogonally relative to the panel top side below the large edge break, with the counter-abutment surface provided on the locking hook being inclined relative to the orthogonal on the panel top side by an angle in the range of 1°-5°, and if the cross-section of the locking hook has an oversize in the inclined area of the counter-abutment surface, so that, in the locked state, a pressure can be exerted between the counter-abutment surface and the abutment surface. The term "oversize" refers to the ratio of the two joinable panel edges. Based on a theoretical nominal dimension of both panel edges, "oversize" means that, based on the nominal dimension, there is more material at either the abutment surface and / or the counter-abutment surface, so that the surface of the abutment surface and / or the surface of the counter-abutment surface protrudes distally further than the nominal dimension.In practice, the maximum oversize can be a few hundredths to a few tenths of a millimeter, which in practice achieves the desired pressure between the butt and counter-butt surfaces of the joined panel edges. This desired pressure is best achieved in the upper area of the butt and counter-butt surfaces and can be... z.B. extend over half the height of the impact surface or counter-impact surface.

[0019] In this way, three measures are possible that prevent water from penetrating the joint or flowing through to the underside of the panel. First, the overlap of the large edge break with the small edge break acts as a seal. Below, the excess of the counter-joint surface creates pressure against the joint surface, which creates a seal.

[0020] At the bottom is the sealing nose, which seals together with the butt surface when locked.

[0021] An advantageous further development provides that the pressure between the counter-impact surface and the impact surface is greater at the upper end of the impact surface and decreases towards the lower end of the impact surface.

[0022] The benefit can be further improved if the sealing nose is arranged at the lower end of the pressure between the counter abutment surface and the abutment surface, with which an increased pressure against the abutment surface can be generated in the locked state.

[0023] For a closed joint, it is useful if the separate locking element has a locking means with which it can be automatically locked into a locking recess in the complementary panel edge.

[0024] An alternative provides that the retaining groove for the separate locking element has parallel groove walls.

[0025] It is advisable for the groove walls of the retaining groove to be at a constant distance from one another.

[0026] It is also helpful if the retaining groove, or rather the groove walls of the retaining groove, are arranged at an angle relative to the top of the panel.

[0027] Furthermore, it is useful if the free opening of the inclined retaining groove is directed upwards, i.e. towards the top of the panel.

[0028] The invention is illustrated below by way of example in a drawing and described in detail using several embodiments.

[0029] They show: Fig. 1 shows a schematic representation of several panels according to the invention in a composite, Fig. 2 shows an example of a cross section through a first pair of edges of a panel according to the invention in the locked state, Fig. 3 shows a cross section through the second pair of edges of the panel according to the invention in the locked state, Fig. 4 shows a perspective representation of two panel pieces with the panel edges according to Fig. 2 in the locked state and with the spring profile according to Fig. 1 , Fig. 5 a perspective view of two panel pieces in the locked state with an alternative separate locking element, Fig. 6 an alternative cross section through a first pair of edges of a panel according to the invention in the locked state, Fig. 7 an alternative cross section through the second pair of edges of the panel according to the invention in the locked state, Fig. 8 a further example of a cross section through a second pair of edges of the panel according to the invention in the locked state, Fig. 9 another example of a cross section through the second pair of edges of the panel according to the invention in the locked state, Fig. 10 a last example of a cross section through the second pair of edges of the panel according to the invention in the locked state, Fig. 11 an enlarged section according to XI in Fig. 10 .

[0030] In Fig. 1 Four identical panels 1, 2, 3 and 4 according to the invention are shown schematically in sections, joined together to form a covering surface. The covering surface can be used for a building wall, ceiling or floor. Each of the panels according to the invention has four panel edges F, M, N and U as well as four corners K1, K2, K3 and K4. As can be seen in the following figures, the panel has a panel top side 7, a panel bottom side 8 and a panel core 9. The panel has two pairs of edges. A first pair of edges is shown by way of example in Fig. 2 and comprises the panel edges N and F, whereby the panel edge N has a groove profile 5 and the panel edge F has a tongue profile 6. A second pair of edges is in Fig. 3 shown and comprises the panel edges M and U, which are designed as hook profiles. The panel edge M is designed as a receiving hook 10 and the panel edge U as a locking hook 11. The receiving hook 10 is provided with a retaining groove 12 for a separate locking element 13. The locking element 13 is mounted and used in such a way that it locks in the vertical direction (vertical locking element). The locking hook 11 can be connected to the receiving hook 10 by means of a joining movement in a vertical plane downwards. If a vertical locking element 13 is used, the vertically acting locking takes place automatically, as shown below with reference to Fig. 3 is described in detail.

[0031] Due to the two different pairs of edges, the proposed panel is suitable for locking by pivoting movement (fold-down). The pivoting movement is in Fig. 1 This is indicated by panel 4, which is shown in dashed lines in an inclined starting position 4'. Panel 4 is moved downwards from its starting position 4' in the direction of the pivot arrow S by a single downward pivoting movement around its panel edge F as the axis of rotation. In doing so, it locks with the groove profile 5 of panels 1 and 2 of a previous panel row P1. At the same time, the panel edge U of panel 4 is locked with the panel edge M of panel 3, which is located in the same panel row P2.

[0032] According to Fig. 1 At a corner K1 of panel 4, the panel edge F (first edge pair) meets the panel edge U (second edge pair). This corner K1 proves to be particularly critical for the sealing of the covering surface against water penetration. At the critical corner K1, the tongue profile 6 of the panel edge F meets the locking hook 11 of the panel edge U. The cross-sections of the tongue profile 6 and the locking hook 11 spatially overlap, creating a complex spatial shape at corner K1.

[0033] In conjunction with other identical panels 1 and 3, the relevant corner K1 of panel 4 is located in an area marked IV. This area forms a T-joint composed of a longitudinal joint (panel edges F / N) and a transverse joint (panel edges M / U). A view of this T-joint in the direction of arrow IV is shown below using Fig. 4 explained in detail.

[0034] Based on Fig. 2 The first pair of edges of the panel according to the invention is shown in cross-section. The viewing direction corresponds to that shown in Fig. 1 The panel edges F and N of panels 1 and 4 are in Fig. 2 as opposed to, as in Fig. 1 indicated by the section line II - II. The panel edge F is designed with a tongue profile and the panel edge N with a complementary groove profile. These complementary panel edges F / N can be shown in sections in a locked state, as if the panel were split into two parts. This form of representation is intended to facilitate the understanding of the functionality and interaction of the complementary panel edges. A starting position 4' of the panel edge F indicates a pivoting movement S. Of course, several panels of the type according to the invention can be locked together in the same way to obtain a covering surface for a building wall, a floor, or a ceiling. Therefore, the Figuren 2 und 3 can also be understood as two panels, each shown in sections.

[0035] The panel edge M designed as a receiving hook 10 and the panel edge U designed as a locking hook 11 of the second edge pair are in Fig. 3 shown in cross-section, also in the assembled and locked state. The viewing direction corresponds to that shown in Fig. 1 marked section line III - III.

[0036] On the second pair of edges, the locking hook 11 of the panel edge M has an edge break in the form of a larger bevel 36 on the panel top side 7, and the receiving hook 10 of the panel edge U is provided with a smaller bevel 37.

[0037] The smaller bevel 37 extends over a distal projection 38, which is arranged distally on the locking hook 11. An underside of the projection forms a counter surface 39, which, in the locked state, covers part of the larger bevel 36 and is in contact with this part, thus creating a first seal against water ingress. The two bevels form a V-shaped joint 40 in the locked state.

[0038] The receiving hook 10 and the locking hook 11 lock the joined panel edges M / U in both the vertical and horizontal directions. For the vertical locking effect, in this embodiment, a separate locking element 13 (vertical locking element) can be inserted into the designated retaining groove 12 of the receiving hook 10. A locking recess 11a is provided on the locking hook, into which the locking element 13 can engage. The locking recess has a sloping lower groove wall 11b and a sloping upper groove wall 11c.

[0039] The retaining groove 12 provided in the receiving hook 10 for the locking element 13 is provided with a flat lower groove wall 12a, an upper groove wall 12b, and a groove base 12c. The upper groove wall 12b has a step 12d arranged such that a narrower part of the retaining groove 12 is formed toward the groove base 12c and a wider area is formed toward the open side of the retaining groove 12.

[0040] The design of the retaining groove 12 with the step 12d is adapted to the known locking element 13, whose cross section in Fig. 3 is shown by way of example. In the illustrated hatched locking element 13, a latching means 13a is designed in the form of a downwardly projecting locking tab 13b, which protrudes from the retaining groove 12. Furthermore, the locking element 13 comprises a holding means 13c, which faces the groove base 12c of the retaining groove 12, and a shoulder 13d, on which the step 12d of the upper groove wall is supported. Suitable locking elements are known, for example, from the following publications: EP 1 415 056 B1, WO 2011 / 087425 A1, and US 2014 / 0366476 A1.

[0041] For the horizontal locking effect, Fig. 3 The receiving hook 10 of the panel edge M is provided distally with a hook edge 41 that protrudes toward the panel top side 7, as well as with a receiving recess 42 that is open toward the panel top side 7. The locking hook 11 of the panel edge U has a locking shoulder 43 that protrudes toward the panel bottom side 8 and a downwardly open locking recess 44. The locking shoulder 43 fits into the receiving recess 42 of the receiving hook 10 and interacts with it.

[0042] The receiving hook 10 has a holding surface 45 on the hook edge 41, which is directed towards the panel core 9. Similarly, a holding surface 46 is provided on the locking hook 11, which is also directed towards the panel core 9. This holding surface 46, together with the holding surface 45 on the hook edge 41, forms an undercut and thus provides a locking effect against the panels 3 and 4 moving apart within the panel plane in a direction perpendicular to the locked panel edges M / U (horizontal).

[0043] In the present example, the locking heel 43 has a distal heel surface 48 on a heel underside 47, which touches a bottom 49 of the receiving recess 42, as well as a proximal recess 50, which extends laterally to the holding surface 46 of the locking heel 43. The recess 50 facilitates a good contact of the holding surfaces 45 / 46 of the hook edge 41 and the locking heel 43.

[0044] Within the locking mechanism according to Fig. 3 Pairs of contact surfaces can also be seen, with each surface of the locking hook 11 being in contact with an associated surface of the complementary receiving hook 10. From top to bottom through the locking mechanism, this begins with a first contact surface pairing, which is formed by the counter surface 39 of the projection 38 of the locking hook and the covered part of the larger bevel 36 arranged on the receiving hook 10.

[0045] The next contact surface pairing is formed by an abutment surface 10a and a counter-abutment surface 11d. The abutment surface 10a is provided on the receiving hook 10 with the panel edge M below the large bevel 36 and the counter-abutment surface 11d is provided on the locking hook 11 of the panel edge N below the small bevel 37. The abutment surface 10a is arranged vertically relative to the panel top side 7 and the counter-abutment surface 11d is inclined by an angle of 3° relative to the orthogonal on the panel top side 7. In this case, an excess of material is provided on an upper part of the counter-abutment surface 11d, which in Fig. 3 is shown in dashed lines as oversize E2. In the locked state, the oversize E2 leads to a pressure between the contact surface pairing of abutting surface 10a and counter-abutting surface 11d, specifically in the upper half of this contact surface pairing. This pressure also creates a seal.

[0046] The third contact surface pairing consists of the abutment surface 10a of the receiving hook 10 and a sealing nose 51 provided at the lower end of the counter abutment surface 11d. The sealing nose 51 extends parallel to the panel edge U over the entire length of the counter abutment surface 11d. The sealing nose 51 protrudes from the counter abutment surface 11d with an excess length, so that in the locked state, it rests against the abutment surface 10a with a certain pressure, providing additional sealing there.

[0047] Fig. 4 shows an isometric view of two connected panels 3 and 4. The representation corresponds to the viewing direction IV, as in Fig. 1 In the foreground of Fig. 4 the tongue profiles F of panels 3 and 4 can be seen. In the rear perspective, the panel edge M of panel 3 and the panel edge U of panel 4.The panel edge M is secured with the receiving hook 10 and the panel edge U with the locking hook 11 according to Fig. 3 provided.

[0048] Furthermore, in Fig. 4 the critical corner K1 of panel 3 is noted, where the receiving hook 10 including the retaining groove 12 provided for the locking element 13 (panel edge M) meets the tongue profile (panel edge F). The perspective of the Fig. 4 shows that the retaining groove 12 runs through the spring profile and emerges at the spring tip. In the area where the retaining groove 12 traverses the spring profile, a portion of the top surface of the spring is also removed. This creates a gap in the top surface of the spring.

[0049] The complementary panel 4 features a locking recess 11a into which the locking element 13 can be automatically engaged. The locking recess 11a also extends through the spring profile on panel 4 and ends as an open cross-section at the spring tip.

[0050] The locking hook 11 (panel edge U) of the panel 4 also includes the downwardly open locking recess 44, which Fig. 3 shown in cross-section. The locking recess 44 also runs transversely through the tongue profile of panel 4 and protrudes in the lower region of the tongue profile. The open cross-section of the locking recess 44 protrudes below the tongue tip.

[0051] Fig. 5 shows a perspective view of two panel pieces of an alternative embodiment of the panel. It differs from Fig. 4 because it is designed for an alternative locking element 52. For this locking element 52, a retaining groove 53 with a rectangular cross-section is provided on the receiving hook 10, into which the locking element 52 can be pre-assembled. The retaining groove 53 has an upper groove wall 54, which is arranged at a distance R2 from the panel top 7. Likewise, a locking contour is provided on the locking hook 11, which is designed as a locking groove 55 and whose cross-section is adapted accordingly so that the locking element 52 can be automatically locked there. Fig. 5 The proposed retaining groove 53 is designed for the use of an arcuate locking element 52, as known from US 2014 / 0366476 A1 (Fig. 3b), or for a locking element known from the same document with rearward resilient bristles (Fig. 6a or 6b) which are supported on the groove base of the retaining groove 53. It is important that the upper side of the tongue of the tongue profile of the panel edge F is arranged at a higher level than the upper groove wall 54 of the retaining groove 53 of the receiving hook 10. The tongue profile of the panel edge F meets the receiving hook 10 at the critical corner K1 of the panel 3. The retaining groove 53 runs through the tongue profile in the area of the corner K1, so that the material of the tongue profile is removed.

[0052] However, the tongue top is not removed. A distance R1 is provided between the panel top 7 and the tongue top, which is greater than the distance R2 between the upper groove wall 54 of the retaining groove 53 and the panel top. 7.

[0053] Fig. 6 shows an alternative cross-section through a first pair of edges of a panel according to the invention in the locked state. The panel has a panel edge F with a tongue profile and a panel edge N with a groove profile.

[0054] The two panel edges F and N are positively locked by the illustrated shape of the complementary panel edges, both in the vertical and horizontal directions.

[0055] Fig. 7 shows an alternative cross-section through the second pair of edges of the panel according to the invention in the locked state. This example comprises a receiving hook 56 on a panel edge M and a locking hook 57 on a panel edge U. A retaining groove 58 for a locking element 59 is provided in the receiving hook. The retaining groove 58 has parallel groove walls that are spaced a constant distance apart.

[0056] The locking hook 57 has a contour 60 into which the locking element 59 can automatically engage during a joining movement. The retaining groove 58 for the locking element 59 is arranged essentially parallel to the panel top side 7. A sealing lug 51 is provided on the locking hook 57, which contacts the receiving hook 56. The contact occurs directly above and close to the retaining groove 58 of the receiving hook 56.

[0057] Fig. 8 shows another example of a second edge pair. Again, a receiving hook 62 is provided on a panel edge M and a locking hook 63 is provided on panel edge U.

[0058] The receiving hook 62 comprises a retaining groove 64 for a locking element 65, wherein the retaining groove 64 has parallel groove walls that are at a constant distance from each other. The locking hook has a contour 66 in which the locking element 65 can automatically engage during a joining movement. In contrast to, for example, the Fig. 7 Here, the retaining groove 64 in the receiving hook 62 is arranged at an angle relative to the panel top side 7. The free opening of the inclined retaining groove 64 is directed upwards toward the panel top side. A sealing lug 51 is provided on the locking hook 63, which contacts the receiving hook 62. The contact occurs directly above and close to the retaining groove 64 of the receiving hook 62.

[0059] Fig. 9 shows another example of a cross-section through the second pair of edges of the panel according to the invention in the locked state. This example also has a receiving hook 68 on a panel edge M and a locking hook 69 on panel edge U, which can be automatically locked in the vertical direction by means of a locking element 70. In this example, however, a holding groove 71 for the locking element 70 is provided on the locking hook 69 and the receiving hook 68 has a contour 72 into which the locking element 70 can automatically snap into place. Here, a sealing lug 51 is provided on the receiving hook 69 and the sealing lug 51 touches the locking hook 68. The contact takes place directly above and close to the holding groove 71 of the locking hook 68.

[0060] Fig. 10 shows a final example of a cross-section through the second pair of edges. This example again has a receiving hook 74 and a locking hook 75, which can be automatically locked in the vertical direction by means of a locking element 76. As in Fig. 9 In this example, a retaining groove 77 is also provided for the locking element 76 on the locking hook 75. The retaining groove 77 has parallel groove walls that are at a constant distance from one another.

[0061] The receiving hook 74 has a contour 78 into which the locking element 76 can automatically engage. Here, a sealing lug 51 is also provided on the receiving hook 74, and the sealing lug 51 contacts the locking hook 75. The contact occurs directly above and close to the retaining groove 77 of the locking hook 75.

[0062] Fig. 11 concerns the Fig. 10 section marked XI. Fig. 11 enlarges it on the one hand and also shows, for the sake of simplicity, only one of two hook profiles, namely the receiving hook 74. The locking element is also shown for the sake of simplicity in Fig. 11 omitted. The sealing nose 51 can be seen, which protrudes at this panel edge in a distal direction from the abutting surface of the receiving hook 74. The cross-section of the sealing nose 51 expediently has an outer contour composed of rounded and curved sections. The distal end of the sealing nose 51 has an inflection point, or rather an inflection point tangent. T. The turning point tangent T is located at the turning point distally at the maximum distance from the panel core and, in this example, is arranged at an angle of 90° relative to the panel top side 7. Bezugszeichenliste

[0063] 1 Panel 2 Panel 3 Panel 4 Panel 4' Starting position 6 Tongue profile 7 Panel top 8 Panel bottom 9 Panel core 10 Retaining hook 10a Butt surface 11 Locking hook 11a Recess 11b Lower groove wall 11c Upper groove wall 12 Holding groove 12a Lower groove wall 12b Upper groove wall 12c Groove base 12d Step 13 Locking element 13a Latching means 13b Latching tab 13c Holding means 13d Shoulder 36Larger bevel 37Smaller bevel 38Protrusion 39Counter surface 40V-groove 41Hook edge 42Receiving recess 43Locking shoulder 44Locking recess 45Holding surface (hook edge) 46Holding surface (locking hook) 47Underside of heel 48Distal heel surface 49Bottom 50Recess 51Sealing nose 52Locking element 53Holding groove 54Upper groove wall 55Locking groove 56Receiving hook 57Locking hook 58Holding groove 59Locking element 60Contour 62Receiving hook 63Locking hook 64Holding groove 65Locking element 66Contour 68Receiving hook 69Locking hook 70Locking element 71Holding groove 72Contour 74Receiving hook 75Locking hook 76Locking element 77Holding groove 78Contour DAxtension E1Oversize E2Oversize FPanel edge (tongue) HHeight K1Corner K2Corner K3Corner K4Corner LPanel edge (groove) MPanel edge (receiving hook) P1Panel row P2Panel row UPanel edge (locking hook) SPivoting movement

Claims

1. Panel (1, 2, 3, 4) with a panel core (9), a panel top side (7), a panel bottom side (8) and with a first pair of edges and a second pair of edges, wherein the first pair of edges is provided with a groove profile (5) on one panel edge (N) and a complementary tongue profile (6) on the opposite panel edge (F), which can be locked by a pivoting movement (S) and then interact in a form-fitting manner such that, in the locked state, a vertical locking effect can be achieved and a movement apart of locked panels (1, 2, 3, 4) in the plane of the panels (horizontally) is counteracted, wherein the second pair of edges is provided with complementary hook profiles on its opposite panel edges, namely a receiving hook (10, 56, 62, 69, 74) and a locking hook (11, 57, 63, 68, 75), whereby the locking hook (11, 57, 63, 68,75) can be joined to the receiving hook (10, 56, 62, 69, 74) by a joining movement in a plane perpendicular to the panel plane, simultaneously by means of the pivoting movement (S) for the first pair of edges, with the proviso that the receiving hook (10, 56, 62) is provided with a holding groove (12, 58, 64) or the locking hook (68, 75) is provided with a holding groove (71, 77) for a separate locking element (70, 76), with which a vertical locking effect can be achieved, , characterized in thaton the receiving hook (10, 56, 62, 69, 74) an abutment surface (10a) is arranged substantially orthogonally relative to the panel top side (7), that on the locking hook (11, 57, 63, 68, 75) a counter-abutment surface (11d) is arranged substantially orthogonally relative to the panel top side (7), that on the second pair of edges at a lower end of the counter-abutment surface (11d) of the locking hook (11, 57, 63, 68, 75) or at a lower end of the abutment surface (10a) of the receiving hook (10, 56, 62, 69, 74) at least one sealing nose (51) is provided, which extends parallel to the respective panel edge (M, U) over the entire length of the counter-abutment surface (11d) or the abutment surface (10a).

2. Panel according to claim 1, characterized in that at least one of the edge pairs has an edge break (16, 17, 36, 37) on its two complementary panel edges (F, N, M, U), which forms a recessed joint (18, 40) when two of these panels (1, 2, 3, 4) are joined together.

3. Panel according to claim 2, characterized in that the edge refractions (16, 17, 36, 37) of at least one of the edge pairs of the complementary panel edges (F, N, M, U) are each provided with a larger edge refraction (16, 36) and a smaller edge refraction (17, 37) and that in the joined state the larger edge refraction (16, 36) is covered by the smaller edge refraction (17, 37).

4. Panel according to claim 3, characterized in that on that panel edge (N, U) with the smaller edge refraction (17, 37) a projection (14a, 38) is provided, on the upper side of which at least a part of the smaller edge refraction (17, 37) extends, and that on an underside of the projection (14a, 38) an undercut counter surface (14b, 39) for the covered part of the larger edge refraction (16, 36) is provided.

5. Panel according to claim 3 or 4, characterized in thatthe smaller edge refraction (17) of the first edge pair is arranged on the groove profile (N) and the larger edge refraction (16) on the tongue profile (F) and that the smaller edge refraction (37) of the second edge pair is arranged on the locking hook (11, 57, 63, 68, 75) and the larger edge refraction (36) on the receiving hook (10, 56, 62, 69, 74).

6. Panel according to one of claims 1 to 5, characterized in that on the second pair of edges, the counter-abutment surface (11d) or the abutment surface (10a) is inclined relative to the orthogonal on the panel top side (7) by an angle in the range of 1°-5°, that the cross-section of the locking hook (11, 57, 63, 68, 75) in the inclined region of the counter-abutment surface (11d) or the abutment surface has an excess (E2) so that in the locked state a pressure can be brought about between the counter-abutment surfaces and the abutment surfaces (10a).

7. Panel according to claim 6, characterized in thatthe pressure between the counter-abutment surface (11d) and the abutment surface (10a) is greater at the upper end of the abutment surface (10a) and decreases towards the lower end of the abutment surface (10a).

8. Panel according to claim 6 or 7, characterized in that at the lower end of the pressure between the counter-abutment surface (11d) and the abutment surface (10a) the sealing nose (51) is arranged, with which in the locked state an increased pressure against the abutment surface (10a) can be generated.

9. Panel according to one of claims 1 to 8, characterized in that the separate locking element (13, 59, 65, 70, 76) has a latching means (13a) with which it can be latched into a latching recess (11a) of the complementary panel edge (M).

10. Panel according to one of claims 1 to 8, characterized in that the retaining groove (12, 58, 64, 77) for the separate locking element (59, 65, 76) has parallel groove walls.

Images