EA004339B1 - Grooved laths and self-catching tabs for forming floors and method for machining said laths - Google Patents

Abstract

1. Laths (1,1') with grooved longitudinal edges capable of being interlocked in order to form a floor, comprising on a longitudinal edge, called right-hand profile, a groove (3) and on the opposite edge, called left-hand profile, a protuberance (19) matching in shape said groove (3), said groove being machined and comprising an indentation (5) on the side of the groove opposite the lateral edge of the lath and parallel bevels (7, 9) oriented toward the edge of said lath and arranged approximately at 45 degrees relative to the sides of the groove, which co-operate during assembly with the protuberance (19) of the left-hand profile of the adjacent lath in the use position, characterised in that said protuberance (19) can be inserted at an angle of about 45 degrees into the groove (3) by means of the bevels (7, 9), by simple downwards pressure and without undue deformation, thus bringing the two successive laths in a same plane. 2. Laths according to claim 1, characterised in that the left-hand and right-hand profiles of the laths are extending upwards of the area comprising said groove (3) in the shape of an interlocking in complementary steps, ending in a flat joint without gaps between the top surfaces.

Description

Subject of invention

The present invention relates to planks, and more specifically, to both the planks themselves and to plates or panels with longitudinal edges on which grooves and protrusions are made, which can be easily connected to a lock to obtain a floor, panel sheathing, etc.

Prior art

A variety of devices and structures are known that make it easy to lay floor elements by snapping the corresponding lateral edges of individual elements in the form of planks or plates of various origins (from solid or laminated wood, from synthetic materials, etc.).

As examples, the constructions that meet the above definition, described in the following documents, can be given.

The document ^ 000/20705 refers to the use of a separate connecting element.

The document ^ 000/20706 also describes a connecting element having deformable lips.

EP-0 843 763-A describes a design in which interacting connecting elements are located at the edge level on opposite sides of the planks, characterized by the presence of built-in mechanical locking means.

Patent Application No. 19933343.2 describes spring elements included in a groove of an adjacent plate.

These documents also refer to other devices of a similar type. One of the features of various known constructions without additional connecting elements is that the locking occurs as a result of simultaneous advance and rotation, which leads to mechanical locking.

So, in the document ΌΕ-ϋ-7928703 describes a system similar to the design proposed here, with the difference that it requires a rotational movement, which allows the fastening of two complementary strips relative to each other. Therefore, simply joining into a groove at an angle of about 45 °, as proposed in accordance with the invention, is not possible there.

OBJECTS OF THE INVENTION

The aim of the present invention is, in particular, to improve existing methods of assembly, and more specifically, to simplify the profiles of grooves and protrusions of the strips, which is achieved, in particular, by reducing the amount of necessary machining operations while ensuring simplicity of laying and obtaining reliable locking.

The subject of the invention is, in particular, the configuration of the profiles, which provides a direct connection to the lock by successive introduction under pressure of one bar into another without rotational movement.

To facilitate the mechanical locking of the side edges of the individual planks, easier access for various tools is provided.

The purpose of the invention is achieved mainly due to the simultaneous processing of both opposite edges (ribs) for a smaller number of passes and so that at least some of the passes can be easily performed in semi-continuous mode, without the need for a significant change in the position of woodworking tools. In particular, the aim is to preserve for most operations the perpendicular position of the instruments with respect to the surface of the planks.

Features of the invention

The essence of the invention lies in the fact that on the edge of the plank there is a groove essentially perpendicular to the surfaces of the plank with bevels at an angle of 45 °, and in the process of bonding, this groove interacts with the counterpart in the form of a protrusion located on the opposite edge of the adjacent slats.

Other details and additional features of the invention will emerge from consideration of the following description of a preferred embodiment with reference to the accompanying drawings and in accordance with the claims.

Brief Description of the Drawings

In FIG. 1 is a cross-sectional view of bonded edge to edge of two successive planks.

In FIG. Figures 2, 3, and 4 show the right-side profile of the bar subjected to three successive machining operations (passes).

In FIG. 5 and 6 show two consecutive passes when processing the left-side profile of the bar.

In FIG. 2-6, the shape and planes of the inset of the tools are indicated by thick lines, and the workpiece is indicated by the usual solid lines, which corresponds to the final configuration, which must be obtained after performing individual passes in relation to this profile.

The shape of the part being machined for a particular passage is complemented by dashed lines.

In the drawings, the planks are conventionally depicted in a position that corresponds to their installation during floor formation. The edge (rib), available on one side, is conventionally referred to as the right-side profile, and the second edge (edge) - as the left-side profile.

These profiles are formed, that is, machined so that the right-side profile of one of the planks can include the left-side profile of the next plank as a result of normal snap-in.

DETAILED DESCRIPTION OF THE INVENTION

The main feature of this invention is that the machining operations are performed in such a way that the bar that should be included in the previous, already laid bar, could be installed in a plane parallel to the adjacent bar, and could be inserted without excessive deformation under pressure directed under an angle of approximately 45 ° downward, as a result of which the stacked plank will be installed in the same plane and at the same level with the previously laid plank.

This is possible due to the fact that the first side of the strip 1 shown in FIG. 2-4 in the form of a right-handed profile, has, when viewed from the bottom up, an upward groove 3, which is perpendicular to the surfaces of the strip 1, and has on its side opposite the lateral edge of the strip, a recess 5 ending in a chamfer 7, which is located relative to the side edge at an angle of approximately 45 °. On the opposite side of the groove 3, a chamfer 9 is made parallel to the chamfer 7.

Chamfer 9 extends to the edge of the edge in the form of a flat surface 11.

The above-mentioned recess 5 is made in the body of the plank and has a continuation (upward) after the chamfer 7 in the form of a cutout 12, which is made almost at a right angle, but, in turn, has a small recess 13. For the upper part considered, other outlines.

The opposite profile, called left-handed, which is shown in relation to the strip adjacent to the strip depicted in FIG. 1, is made as a reciprocal part with respect to the construction described above, while it has a protrusion 19 included in the groove 3.

In FIG. Figures 2-6 show the shape of the tools 21, 23, 25, 27, and 29 used for individual passes when processing right and left profiles.

It should be borne in mind that, although the working position of the tools is shown taking into account the direction of laying the plank when forming the floor, it is obvious that during the machining operations other positions of these tools can be set, provided that the workpiece must be placed appropriately image in relation to the tool itself.

It should also be noted that, with the exception of the operation shown in FIG. 4, the tools are located during processing at a right angle relative to the upper and lower planes of the strips.

In FIG. Figure 4 shows the only operation in which the tool is positioned at an angle of approximately 45 ° relative to the planes of the planks.

We also point out that the number of operations is reduced, the shape of the tools is relatively simple, and individual processing steps can be performed on traditional machines such as copy-milling.

It goes without saying that processing can be carried out simultaneously on both edges of the bar blank.

The scope of the invention naturally encompasses additional finishing operations, such as deburring, varnishing, etc.

Due to the presence of chamfers 7 and 9, it is possible to introduce the protrusion 19 of the left-side profile of the stacked strip, setting it in a plane parallel to the right-side profile of the previous strip, while the installation is carried out in a fairly simple way under the action of an angle directed at an angle of about 45 °.

As can be seen from the drawings, if the left-side profile of the strip 1 'is responsive to the right-side profile of the previous strip 1, then it is necessary to leave some clearance (see Fig. 1), which will facilitate the connection in the groove. Corresponding fillets are provided that provide the opportunity to freely enter the protrusion into the groove in the position when the stacked bar is at an angle of about 45 ° relative to the previous one, and then the possibility of connecting them to the lock.

Claims (2)

CLAIM 1 23—, 3 9 FIG. 3 1. Plank (1, 1 ') with longitudinal grooved edges, made with the possibility of connection with the formation of the floor, having on the longitudinal edge, called the right-hand profile, a groove (3), and on the opposite edge, called the left-hand profile, protrusion (19), having a shape that is reciprocal with respect to said groove (3), wherein said groove is machined and has a recess (5) on the side opposite the lateral edge of the strip, as well as parallel chamfers (7, 9) directed toward the edge of said strip and located at an angle of approximately 45 ° relative to the lateral edge, which during installation interact with the protrusion (19) of the left-side profile of the adjacent strip, characterized in that the chamfers (7, 9) provide the ability to enter the specified protrusion (19) at an angle of about 45 ° into the groove ( 3) by simply pressing down and without excessive deformation, as a result of which two successive planks are installed in the same plane. Right side profile 2. The bar according to claim 1, characterized in that its left-side and right-side profiles are made in the form of a continuation upward of a zone including said groove (3), forming a lock by complementary steps, ending in a flat, without a gap, junction of the upper surfaces.