Groove and tongue joint between two adjoining wooden panels.

The invention relates to a Tongue and groove between two adjacent wooden panels for paneling walls, ceilings or the like., With the panels each having a front surface and a rear surface.

Known tongue and groove connections of wood panels are usually such that the edge of one panel a groove constant width, measured in the thickness direction of the panel is incorporated and that the edge of the other panel, a spring constant thickness, measured in the thickness direction of the panel, protrudes. The width of the groove and the thickness of the spring correspond to each other so that a mutual fixing in two opposite directions is perpendicular to the rear surface of the panels during the engagement by pushing the tongue and groove for connecting the two panels. It has been found that with this type of tongue and groove, the insertion of the tongue sometimes causes difficulties in the groove and in that the narrow tongue and groove fit a free working of the panels at the joint, especially when shrinkage of the wood under dehydration, Disabled. In addition, the mounting of the panels on the grooved edge of the panel a supporting substructure made relatively cumbersome.

The invention has the object of making a tongue and groove between two adjacent wood paneling panels available, which leads to a substantially facilitate assembly of the panels and to improved relative movement behavior of the mounted panels.

To achieve this object, the tongue and groove is inventively designed, as specified in the characterizing part of claim 1.

By the back surface side projecting from the groove edge of a panel there is formed a projection behind the groove, which can be used for convenient attachment of fastening means, in particular during nailing or screwing or adhering to the substructure. The taper of the groove and / or the spring in conjunction with the play between the groove and the tongue, both at the beginning of the introduction of the groove results in the spring and in the completely collapsed condition to the fact that the neighboring strip with his pen particularly easy to can introduce groove of an already mounted panel, said existing in contracted state game offers at least in the spring root or Nutausmündung space for accommodating the end of a corresponding claw for attaching the panel to the substructure or the heads of other fasteners. At sufficiently large excess of the groove compared to the spring even is introducing at an initial angle of the straight-to-install panel relative to the corresponding neighboring strip, followed by a tipping movement followed in the mounting position possible. The spring slides easily play into the corresponding groove. All this also applies to panels that - as happens frequently in practice - not quite level are by warping. Said supernatant helps a lower guide surface during insertion of the tongue into the groove. Further movement of the panels relative to each other, for example by temperature fluctuations, or the work of the panels are facilitated in particular by changes in humidity. Finally, the spring and / or the rear surface side cheek are more stable because they have especially in the critical transition area to the rest of the panel has a greater thickness. The panels are made of a wooden material, in particular solid wood, which can be brushed on the exposed surface or front surface of the panel. It is usually to generally rectangular, often elongated, cladding panels. As a root spring that region of the spring is referred to, which is used in panels mounted in the region of the Nutausmündung the adjacent panel. This spring root is usually the rear end of the spring at the transition in the remaining panel thickness is normal, but can also be a piece of the described transition are removed, for example with a larger groove depth compared to spring height. That the width of the groove is continuously greater than the thickness of the spring at the corresponding point substantially boils in that the groove essentially over its entire depth from the Nutausmündung to the groove bottom a greater distance than the thickness of the spring at the appropriate place has, whereby the described game gives practically the entire groove depth or height of the spring. The contact surfaces formed by the rear surface parallel surfaces of the tongue and groove retain their position relative to the Paneelrückflächen or Unterkonstuktion even when relative displacements of adjacent panels. Due to the rear surface side installation of the panels to the substructure, the spring is on one side at least substantially in abutting contact with a groove wall, whereby in spite of said statistics a clean determining the relative position of adjacent panels are perpendicular to their rear surface. If one in the attachment of wooden panels working on the substructure with claws that grip the rückfächenseitige cheek, there is the further advantage that the claws on the tapered outwardly or inwardly become thicker cheek due to elastic and keep exactly. One can also claws before positioning of each wooden panel already connect it to the cheek, without that they would easily fall off, and then insert the wooden panel with its tongue into the groove of the adjacent panel and position to the substructure and fix it by means of the claws.

Preferred embodiments of the invention are specified in claims 2 and 3. FIG.

The Erfindugn further refers to the wooden panels per se, which are designed such that they allow the creation of tongue and groove connections type described above with respective neighboring panels, see. Claim 4.

The invention and further developments of the invention are explained in more detail below with reference to embodiments. Show it:<ul><li>1 shows in section the edges of two lining panels in a state of approach during assembly.</li><li>FIG. 2 in section, the edges of two in detail about different design trim panels in the fully assembled condition.</li></ul>

The right in Fig. 1 panel 2 has in its left-hand edge of a groove 4 which runs perpendicular to the drawing plane along the edge of the panel 2. The top in Fig. 1 wall or boundary surface 6 of the groove 4 is parallel to the rear face 8 and the front surface 10 of the panel. The semi-circular in cross-section groove base is 12, and the leftward Nutausmündung is designated 14th runs in Fig. 1 lower wall or boundary surface 16 of the groove 4 at an angle in the range of 8 ° to 15 ° inclined to the back surface 8 that the width w of the groove 4, measured perpendicular to the rear face 8 of the Nutausmündung 14 continuously decreases in direction towards the groove base 12th In Fig. 1 below the groove 4, that back surface side of the groove 4, the edge of the panel 2 protrudes more to the left than above the groove 4, so the front surface side of the groove 4. As a result, a projection 18 is formed. Above the groove 4 of the edge of the panel 2 for a piece of the panel height is perpendicular to the rear face 8 and the front surface 10 is followed by a first concave and then convex curvature for visually appealing, smooth transition into the front face 10th

The left in Fig. 1 panel 2 has at its right in FIG. 1, the edge of a spring 20 whose upper surface or boundary surface 22 is also parallel to the rear face 8 and the front side 10 of the panel 2. The lower surface or boundary surface 24 is substantially at the same angle as the lower boundary surface 16 of the groove 4 relative to the rear face 8 of the associated panel 2. The height of the spring 22, measured horizontally in Fig. 1, by the spring root 26 on the free spring end 28 is substantially equal to the level measured in FIG. 1, the depth of the groove 4 from the groove base 12 to the Nutausmündung 14 d the vertically in Fig. 1, that is perpendicular to the rear face 8 and the front surface 10, measured thickness of the spring 20, however, is less than the width W of the groove 4, whereby in this expression sites of the spring 20 and of the groove 4 compares with each other, each at the same distance from the groove bottom 12 and the free spring end 28 or from the Nutausmündung 14 and by the spring root 26th The upper limiting surface 6 of the groove 4 has the same distance from the back surface 8 of the right panel 2 such as the upper boundary surface 22 of the spring 20 of the left panel 2. Above the spring 20 is designed in the left panel 2 mirror image of the right panel second Below the spring 20 of the edge of the left panel bounces back further than 2 above the spring 20, according to the projection 18 on the right panel. 2

It can be seen that the left panel 2 can be inserted into the groove 4 of the right panel 2 with its spring 20, which remains in the pushed-together state between the lower limiting surfaces 16 and 22 match. One can also imagine immediately that this insertion due to the play, supported yet by the semicircular sectional rounding the free end of the spring 28 and serving as a bearing surface protrusion 18, exceptionally light of goes where initially even inserting the tongue 20 obliquely from above into the groove 4 is possible. If necessary, you can easily round off the right edge of the left panel 2 in addition to the transition to the rear surface or chamfer.

The panels 2 shown in FIG. 2 are just like the panels 2 of Fig. 1 designed with only instead of the concave-convex rounding at the transition from the edge to the front face 10 initially made a chamfer and then only a convex rounding of the bottom up has been. Fig. 2 shows the pushed-together state of the two panels 2. Between the edges of the two panels 2, a fastening claw 26 is seen to the left in the sectional view of FIG. 2, the shape of a horizontal, open to the right U with a lower horizontal extension leg by Has. The U of claw 26 engages the projection 18 from the top, left and bottom. The left panel 2 rests on the extended left lower leg of the claw 26. The claw 26 is slid from the left to the supernatant 18 and nailed with a nail 28 on the supporting substructure before attaching the left panel 2 by the left leg extension through , Alternatively, it is possible, instead of making the claw 26 a fastening the right panel 2 on the substructure by reacting through nailed from above before attaching the left panel 2 by the projection 18 with a nail at an angle. Since the edge of the right panel projecting further, this nailing is very easy. The upper, almost horizontal leg of the claw 26 takes 4th place in the open space between the spring 20 and the lower boundary surface 16 of the groove.

Since the rear surfaces 8 of the panels 2 are fixed to the substructure and the upper boundary surfaces 6 and 22 have an equal distance from the rear surfaces 8, in spite of the lower clearance between the spring 20 and the lower Nutbegrenzungsfläche is a determination of the relative position of the two panels 2 in direction given perpendicular to the back surfaces. 8 The spring 20 and the groove 4 are cut out of the material of the panels. 2 In the drawn design an oblique introduction of the left panel is possible at an angle of 45 °.

The supernatant 18 described has the further advantage that anywhere in the panel created by the panels 2 Durchblick openings are prevented by the joints between adjacent panels 2, there this supernatant 18 milled away where at the panel corner because of the transition to a provided with spring 20 edge is because either a spring 20 or a supernatant 18 everywhere cover the joints between adjacent panels 2, even when shrinkage of the wood of the panels 2 and thereby increasing joints. Such situation occurs in panels that are ausqebildet at two adjoining edges each provided with groove and on the other two adjoining edges each having spring.

The drawings are to scale the scale of 2: 1 for 19 mm thick panels. Because of the dimensions at the edges of the panels and the dimensions of the groove 4 and the spring 20 is expressly made to the drawing figures.

The springs and the grooves in the panel according to the invention can be concisely as wedge-shaped, possibly rounded end designated.

The drawn embodiments may be modified so that when a wedge-shaped spring 4, the groove 20 the surface 16 has parallel to the surface 6 at a distance from the Nutausmündung 14 or that in a wedge-shaped groove 20, the spring 4, the surface 24 has parallel to the surface 22nd