PT1349994E - Flooring system comprising a plurality of mechanically joinable floorboards - Google Patents

Flooring system comprising a plurality of mechanically joinable floorboards Download PDF

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Publication number
PT1349994E
PT1349994E PT02729615T PT02729615T PT1349994E PT 1349994 E PT1349994 E PT 1349994E PT 02729615 T PT02729615 T PT 02729615T PT 02729615 T PT02729615 T PT 02729615T PT 1349994 E PT1349994 E PT 1349994E
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PT
Portugal
Prior art keywords
tongue
plane
surface
characterized
joint
Prior art date
Application number
PT02729615T
Other languages
Portuguese (pt)
Inventor
Darko Pervan
Original Assignee
Valinge Aluminium Ab
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
Priority to SE0100101A priority Critical patent/SE519768C2/en
Priority to SE0100100A priority patent/SE523823C2/en
Application filed by Valinge Aluminium Ab filed Critical Valinge Aluminium Ab
Publication of PT1349994E publication Critical patent/PT1349994E/en
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=26655372&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=PT1349994(E) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.

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Classifications

    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04FFINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F15/00Flooring
    • E04F15/02Flooring or floor layers composed of a number of similar elements
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04FFINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F15/00Flooring
    • E04F15/02Flooring or floor layers composed of a number of similar elements
    • E04F15/04Flooring or floor layers composed of a number of similar elements only of wood or with a top layer of wood, e.g. with wooden or metal connecting members
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04FFINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F2201/00Joining sheets or plates or panels
    • E04F2201/01Joining sheets, plates or panels with edges in abutting relationship
    • E04F2201/0107Joining sheets, plates or panels with edges in abutting relationship by moving the sheets, plates or panels substantially in their own plane, perpendicular to the abutting edges
    • E04F2201/0115Joining sheets, plates or panels with edges in abutting relationship by moving the sheets, plates or panels substantially in their own plane, perpendicular to the abutting edges with snap action of the edge connectors
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04FFINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F2201/00Joining sheets or plates or panels
    • E04F2201/01Joining sheets, plates or panels with edges in abutting relationship
    • E04F2201/0153Joining sheets, plates or panels with edges in abutting relationship by rotating the sheets, plates or panels around an axis which is parallel to the abutting edges, possibly combined with a sliding movement
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04FFINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F2201/00Joining sheets or plates or panels
    • E04F2201/02Non-undercut connections, e.g. tongue and groove connections
    • E04F2201/023Non-undercut connections, e.g. tongue and groove connections with a continuous tongue or groove
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04FFINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F2201/00Joining sheets or plates or panels
    • E04F2201/02Non-undercut connections, e.g. tongue and groove connections
    • E04F2201/025Non-undercut connections, e.g. tongue and groove connections with tongue and grooves alternating transversally in the direction of the thickness of the panel, e.g. multiple tongue and grooves oriented parallel to each other
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04FFINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F2201/00Joining sheets or plates or panels
    • E04F2201/04Other details of tongues or grooves
    • E04F2201/041Tongues or grooves with slits or cuts for expansion or flexibility
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04FFINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F2201/00Joining sheets or plates or panels
    • E04F2201/04Other details of tongues or grooves
    • E04F2201/042Other details of tongues or grooves with grooves positioned on the rear-side of the panel
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04FFINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F2201/00Joining sheets or plates or panels
    • E04F2201/05Separate connectors or inserts, e.g. pegs, pins, keys or strips
    • E04F2201/0517U- or C-shaped brackets and clamps

Description

1

DESCRIPTION

" PAVING SYSTEM COMPREHENDING A PLURALITY OF PAVING PLATES THAT MAY BE PRESENT IN A MECHANICAL MODE " The present invention relates to a flooring system which allows mechanical joining of the floorboards.

TECHNICAL FIELD The present invention is especially suitable for floorboards which are based on wood material and which normally have a core of wood and are intended to be mechanically joined. The following description of the technique according to the prior art practices and the objects and features of the present invention will thus be directed to this field of application and, above all, to rectangular parquet flooring which are joined along the length of its longer side as well as along the shorter side. The present invention is particularly suitable for floating floors, that is, floors which can move relative to the base. It should be emphasized, however, that the present invention can be used in all types of rigid flooring, such as homogeneous wooden flooring, wood flooring with a lamellar core or a particleboard core, wood veneer surface and a wood fiber core, thin laminate flooring, floors with a plastic core and the like. The present invention can of course also be used in other types of flooring which can be prepared with cutting tools, such as wood chipboard or chipboard flooring. Even if this is not preferred, floorboards may, after installation, be fastened to the base.

Technical Background of the Invention

Mechanical joints have assumed a huge market share in the short term, mainly due to their superior settling properties, joint resistance and joint quality. Even if the pavement according to WO 9426999 as described in more detail below and the pavement marketed under the Alloc® brand have great advantages compared to the traditional glued pavements, however, further improvements are desirable .

Mechanical joints systems are very practical for joining not only laminate flooring but also wood flooring and composite flooring. Such floorboards may consist of a large number of different materials on the surface, the core and the back side. As will be described below, these materials may be included in the different parts of the joint system, such as a strip, a closure member and a tongue. A solution involving an integral strip which is formed according to, for example, WO 9426999 or WO 9747834 and providing the horizontal joint, and also involves a tongue which provides the vertical joint, results in However, costs in the form of wastage of material associated with the formation of the mechanical seal through the mechanical working of the plate material. 3

For optimal operation, for example a parquet flooring having a thickness of 15 mm should have a strip having a width that is approximately equal to the floor thickness, i.e. approximately 15 mm. With a tongue of about 3 mm, the amount of waste will be 18 mm. The floor plate has a normal width of about 200 mm. Thus, the amount of waste material will be about 9%. In general, the cost of waste material will be high if floorboards consist of expensive materials, if they are thick or if their size is reduced, so that the number of meters of joint per square meter is high.

Of course the amount of waste material can be reduced if a strip is used which is in the form of a separately manufactured aluminum strip which is already attached to the floorboard in the factory. Additionally, the aluminum strip may in many applications result in a better and cheaper system of joints than a formed and formed strip from the core. However, the aluminum strip is disadvantageous since the investment cost may be considerable and a large rebuild of the plant may be required in order to convert a traditional production line so that the floor boards with such a mechanical seal system can be produced. An advantage of the aluminum strip according to the prior art is, however, that the initial shape of the floorboards does not have to be changed.

When a strip produced by working the pavement material of is involved the opposite happens. Thus, the shape of the floorboards must be adjusted so that there is enough material to form the strip and the tongue. For laminate flooring it is often necessary to also change the width of the used decorative paper. All these adjustments and changes also require costly modifications of production equipment and large product adaptations.

In addition to the previous problems related to the undesirable waste material and to the costs of producing and adapting the product, the strip has drawbacks in that it is sensitive to damage during transport and installation.

In conclusion, there is a great need to provide a mechanical seal at a lower cost of production while at the same time the aim is to maintain the present excellent properties associated with placement, assembly, quality of joints and with strength . With the solutions according to the prior art it is not possible to obtain a low cost without also having to decrease the standards of resistance and / or the positioning function. An object of the present invention is thus to indicate solutions which aim to reduce cost while the strength and functionalities are maintained. The invention has its commencement with known floorboards having a core, an anterior side, a back side and opposing joint flange portions, one of which is formed as a tongue groove defined by upper flanges and lower and having a lower end and the other is formed as a tongue with an upwardly oriented portion at its free outer end. The tongue groove has a shape of a lower groove with an aperture, with an inner portion and an inner closure surface. At least portions of the lower collar are formed constituting a single piece with the floor plate core and the tongue has a locking surface which is designed to act in conjunction with the internal locking surface in the groove of the tongue of a plate of adjacent flooring when two of said floorboards are mechanically joined so that their front sides are located in the same plane of surface (HP) and are in a plane of the joint (VP) oriented perpendicular to the it. This technique is disclosed, inter alia, in WO 9627721, DE-A-1212275 and JP 3169967, which will be discussed in more detail below.

Prior to this, however, the general art concerning floorboards and mechanical closure systems for floorboards will be described as antecedents of the present invention.

Description of Prior Art

In order to make it easier to understand and describe the present invention, as well as the problems preceding the invention, there follows a description of both the basic construction and the operation of the floorboards according to WO 9426999 and WO 9966151, referring to Figs. 1-10 of the accompanying drawings. In applicable parts, the following prior art disclosure also applies to the embodiments of the present invention as described below. 6

FIGS. 3a and 3b show a floor plate 1 according to WO 9426999 from an upper perspective and a lower perspective, respectively. The plate 1 is rectangular with an upper side 2, a lower side 3, two opposing long sides with joined flange portions 4a and 4b, and two short opposing sides with joint flange portions 5a and 5b.

The long side edge flange portions 4a, 4b, as well as the short side flange joint flange portions 5a, 5b may be mechanically joined without glue in a direction D2 in Fig. 1c, so that they are in a joined plane VP (marked in Fig. 2c) so as to present, in its settled state, its upper sides in a common surface plane HP (marked in Fig. 2c).

In the illustrated embodiment, which is an example of floor boards according to WO 9426999 (Figs 1-3 of the accompanying drawings), the plate 1 has a factory-assembled strip 6 extending along the entire long side 4a and which is made of a flexible and resilient aluminum foil. The strip 6 extends outwardly past the joint plane VP in the joint lip portion 4a. The strip 6 may be clamped mechanically in accordance with the illustrated embodiment or else by glue or otherwise. As mentioned in the abovementioned documents, it is possible to use as material intended for a strip that is attached to the floorboard in the factory, as well as other strip materials such as a sheet of another material, aluminum or plastic sections. Also and as indicated in WO 9426999 and as described and illustrated in WO 9966151, the strip 76 may instead be fully formed by the plate 1, for example, by appropriately working the plate core 1. The present invention may be used for floorboards in which a strip or at least a portion thereof is fully formed with the core, and the invention solves special problems existing in the joining, separation and production of such plates of pavement. The core of the floorboard need not be, but is preferably made of a uniform material. The strip is, however, integrated with the board, that is, it must be formed in the board or be assembled in the factory.

In known embodiments according to the previously mentioned documents WO 9426999 and WO 9966151, the width of the strip 6 may be about 30 mm and the thickness of about 0.5 mm.

A similar but smaller strip 6 'is disposed along a short side 5a of the plate 1. The portion of the strip 6 which projects beyond the plane of the joint VP is formed with a closure element 8 which extends over the entire length of the strip 6. The closure element 8 has in its lower part an operative closure surface 10 which faces the plane of the joint VP and has a height of, for example, 0.5 mm . During settling, this catch surface 10 acts simultaneously with a catch groove 14 which is formed in the lower side 3 of the seam edge portion 4b of the opposite long side of an adjacent plate 1 '. The strip 6 'along the short side has a corresponding locking element 8', and the short-side joint flange portion 5b has a corresponding locking groove 14 '. The edge of the locking grooves 14, 14 'which faces the opposite direction of the plane of the joint flange VP forms an operative locking surface 10' for acting simultaneously with the operative locking surface 10 of the locking member.

For the mechanical connection of the long sides as well as the short sides also in the vertical direction (direction D1 in Fig. 1c), the plate 1 is also along its long side (portion of the joint flange 4a) and its short side ( portion of the joint flange 5a) formed with a laterally open recess or with a tongue groove 16. This is defined in the upward direction through an upper collar in the portion of the joint flange 4a, 5a and downwardly by the respective strips 6, 6 '. In the opposing edge portions 4b, 5b there is an open recess 18 defining a locking tongue 20 which acts in conjunction with the recess or with the tongue groove 16 (see Fig. 2a).

FIGS. 1c '' illustrate as two long sides 4a, 4b of such plates 1, 1 'on a U-base which can be joined with others by tilting downwards through pivoting about a center C near the intersection between the surface plane HP and the plane of the PV joint, while the plates are maintained essentially in contact with one another.

FIGS. 2a-2c illustrate how the short sides 5a, 5b of the plates 1, 1 'can be joined to one another by a snap action. The long sides 4a, 4b can be joined by means of both processes, whereas the joining of the short sides 5a, 5b - after laying the first row of floor plates - is usually effected simply by a snap action after the long sides 4a, 4b have been first joined.

When a new plate 1 'and a pre-set plate 1 are to be joined along the portions 4a, 4b of its long lateral edge according to Figs. the portion 4b of the long side edge of the new plate 1 'is pressed against the long side edge portion 4a of the plate 1 previously set in accordance with FIG. 1a, so that the locking tongue 20 is inserted into the recess or tongue groove 16. The plate 1 'is then inclined downwardly toward the floor covering U according to Fig. 1b. The latch tongue 20 enters completely into the recess or tongue groove 16 while at the same time the latch 8 of the strip 6 engages within the catch groove 14. During this downward inclination, the top portion 9 of the closure element 8 may be operative and effect the guide of the new plate 1 'towards the plate 1 which had been previously laid.

In their joined position according to Fig. 1c, the plates 1, 1 'are certainly closed in the direction D1 as well as the direction D2 along the long side edge portions 4a, 4b, but the plates 1, 1 'may be displaced relative to one another in the longitudinal direction of the joint along its long sides (i.e., from direction D3).

FIGS. 2a-2c illustrate how the portions 5a and 5b of the short side edges of the plates 1, 1 'can be mechanically joined in the direction D1 and in the direction D2 by moving the plate 1' essentially in the horizontal direction, in particular, be effected after the long side of the new plate 1 'has been joined through the inward slope according to Figs. la-c, with a plate 1 previously seated in an adjacent row. In the first step in Fig. 2a, the bevelled surfaces of the recess 16 and the tongue 20 close cooperate so that the strip 6 'is pushed down as a direct consequence of the joining of the small side edge portions 5a, 5b. During the final coupling, the strip 6 'engages when the catch member 8' enters the catch groove 14 'so that the operative closure surfaces 10, 10' of the catch member 8 'and the catch groove 14 'to fit together.

By repeating the operations illustrated in Figs. la-c and 2a-c, the entire floor can be laid without glue and along the edge joints. Accordingly, floors according to the prior art and of the aforementioned type may be mechanically joined and are generally inclined downwards on the long side and the short sides when the long side has been closed, others by horizontal displacement of the new plates 1 'along the long side of the previously laid plate 1 (direction D3). The plates 1, 1 'can, without damaging the gasket, be withdrawn again in the reverse order and then seated again. Parts of these seating principles are still applicable in association with the present invention.

In order to function optimally and to allow easy settling and re-collecting, the prior art plates must, after being joined, along their long sides, be able to take a position where there is a possibility of a small gap between the operative closure surface 10 of the closure element and the operative closure surface 10 'of the closure groove 14. However, there is no need for any gap in the underside joint between the plates in the closure plane VP joint near the top side of the plates (i.e., in the HP surface plane). In order to assume such a position it may be necessary to press one plate against the other. A more detailed description of this clearance may be found in WO 9426999. Such a clearance may be on the order of 0.01-0.05 mm between the operative closure surfaces 10, 10 'when pressing the long sides of adjacent plates one against the other. This clearance facilitates the entry of the catch element 8 into the catch groove 14, 14 'and the outlet thereof. However, as mentioned, there is no need for any gap at the joint between the plates, where the surface plane HP and the plane of the joint VP intersect at an upper side of the floor plates. The joined system allows movement along the joint flange in the closed position after the joining of an optional side. Thus, the seating can take place in many different ways which are all variants of three basic processes: - Long side inclination and short side fitting. - Long side fitting - short side fitting. - Inclination of the short side, inclination upwards of the two plates, displacement of the new plate along the edge of the short side of the anterior plate and finally the downward slope of both plates. 12 The most common and safest settling process is one in which the long side is first sloped down and secured against another floor plate. Thereafter a displacement of the closed position takes place towards the short side of a third floor plate so that the short side fitting can take place. The seating can be done on one side, the long side and the short side, being fitted with the other plate. Thereafter a displacement in the closed position takes place until the other side engages with a third plate. These two processes require the engagement of at least one side. However, the nesting can take place without there being a nesting action. The third alternative is that the short side of a first plate slopes inwardly first toward the short side of a second plate, which is already joined at its long side with a third plate. After this connection, the first and second plates are slightly inclined upwards. The first plate is moved in the upwardly inclined position along its short side until the upper gasket edges of the first and third plates are in contact with each other, whereupon the two plates are inclined downwardly together. The floor plate described above and its closure system have been very successful in the market for laminate floorings having a thickness of about 7 mm and an aluminum strip 6 having a thickness of about 0.6 mm. Likewise, commercial variants of floorboards according to WO 9966151 shown in Figs. 4a and 4b have been successful. However, it has been found that this technique is not particularly suitable for floorboards which are made from a wood and fiber based material, in particular for solid wood material or for laminated wood material bonded to to form parquet floors. One reason why this known technique is not suitable for this type of products is the large amount of waste material that takes place as a result of working the edge portions so as to form a tongue groove with the required depth.

Another known design for magnetic closure systems for plates is shown in GB-A-1430423 and in Figs. 5a-5b of the accompanying drawings. This system is basically a tongue and groove joint having an additional locking hook on an elongate collar on one side of the tongue groove and having a corresponding locking collar formed on the top side of the tongue. The system requires considerable elasticity of the collar having the hook, and disassembly can not be performed without destroying the edges of the plate joints. A tight fit makes fabrication difficult and the joint geometry causes a lot of material waste. WO 9747834 discloses floor boards with different types of mechanical closure systems. Locking systems which are designed to fasten the long sides of the plates (Figs 2-4, 11 and 22-25 of the document) are designed to be assembled and disassembled by a connecting and tilting movement, while most of which are intended to engage the short sides of the plates (Figs 5-10) are designed so as to be connected to one another by being pushed outwardly to translate one another to be connected by means of a socket pressure, but these locking systems on the short sides of the plates can not be disassembled without being destroyed or in any case without being damaged.

Aliquots of the plates which are disclosed in WO 9747834 and which have been designed to be bonded and disassembled either by snapping or snapping together (Figures 2-4 in WO 9747834 and Figures 14a- and in the accompanying drawings) have a groove in their border and a strip which projects down the groove and extends beyond a plane of the joint in which the upper sides of the two joined plates meet. The strip is designed to act simultaneously with a complementary portion formed on the opposing edge of the plate, so that two similar plates can be joined. A common feature of these floorboards is that the upper tongue side of the plates and the corresponding upper furrow surface of the groove are flat and parallel with the upper side or surface of the floor plates. The connection of the plates so as to prevent them from separating in the transverse direction of the plane of the joint is obtained exclusively by means of locking surfaces on the one hand on the lower surface of the tongue and on the other hand on the upper surface of the lower collar or the strip below of the groove. These closure systems also suffer from the drawback of requiring a portion of strip extending beyond the plane of the joint, which causes a waste of material also in the joint edge portion where the groove is formed.

For the mechanical connection of the different types of slabs, in particular floor slabs, there are many suggestions in which the amount of waste of material is very low and in which the production can take place effectively using also wood-fiber materials and wood-based plaques. Accordingly, WO 9627721 (Figs 5a-b) of the accompanying drawings) and JP 3169967 (Figs 7a-b of the accompanying drawings) show two types of engaging joints which produce a reduced amount but which have the drawback of not allowing easy disassembly of the floors. Additionally, in these systems it is not possible to use high closing angles in order to reduce the risk of disassembly. Additionally, the geometry of the joint is disadvantageous with respect to engagement, which requires a considerable degree of deformation of the material, and with respect to the manufacturing tolerances where large surface portions must be suitably adjusted relative to each other. These large surface portions which are in contact with one another also make it difficult to move the floor plates relative to one another when in the closed position.

Another known system is disclosed in DE-A-1212275 and shown in Figs. 8a-b in the accompanying drawings. The known system is suitable for sports decks of plastic material and can not be fabricated by means of large disc-shaped cutting tools for the formation of the pointed lower groove. Additionally, this system can not be disassembled without the material having such a high elasticity that the upper and lower flanges around the lower groove can be greatly deformed while being pulled. This joint type 16 is based on wood-based materials if high quality joints are desired. FR-A-2675174 discloses a mechanical seal system for tiles having complementary formed oppositely disposed edge portions, in which use is made of separate spring tips which are mounted remote from one another and which are formed so as to secure a collar in the edge portion of an adjacent tile. The joint system is not designed to be disassembled by hinging, which is obvious from Fig. 10a and, in particular, Fig. 10b of the accompanying drawings.

A further system is disclosed in DE 20001225U1, where the yield of the lower collar is verified. However, this construction according to the prior art is very sensitive and has major drawbacks because the lower collar has been weakened by the closure groove.

Further, DE 19925248 discloses a system with an upwardly facing closure member.

As is evident from the foregoing, systems according to the prior art have both disadvantages and advantages. However, no closure system is suitably adapted for the rational production of floor slabs with a system which is optimum with regard to the technique of production, material waste, settling and withdrawal and which can still be used for floorings which are intended to have high quality, resistance and that work in their settled state. 17

It is an object of the present invention to satisfy this need and provide such an optimum pavement forming system. Other objects of the present invention are apparent from the foregoing as well as from the following description. Document DE 199 25 248 A discloses a floor forming system having a tongue and groove joint, wherein the tongue has an upwardly oriented portion disposed at a distance from the free outer end of the tongue. EP-A-1 223 265, which has been presented before, but published after, the date of submission of the present document, discloses a floor forming system having a tongue and groove joint, wherein the tongue has a upwardly directed portion disposed at a distance from the free outer end of the tongue. EP 1 045 083 A1 discloses a floor forming system having the features of the preamble of claim 1, comprising a plurality of floorboards, each having a tongue and groove joint intended for mechanical attachment of the floorboard with identical identical floorboards. However, if formed from a wood-based material, when subjected to moisture, the floor plates of this floor system will suffer from the elevation of their upper edge portions due to the swelling of the floor material, which result a less appealing pavement.

Summary of the Invention 18

A floor panel and an openable closure system comprise a lower groove on one of the long sides of the floorboard and a tongue projecting on the opposing long side of the floorboard. The lower groove has a corresponding upwardly facing inner latching surface remote from its tip. The tongue and the lower groove are formed so as to be placed side by side by means of a snap action. Preferred embodiments are also removable by a tilting movement having its center near the intersection between the surface planes and the common joint plane of two adjacent floorboards. The lower cut in the tongue groove of such a closure system can be produced by means of disc-shaped cutting tools whose rotating shafts are inclined relative to one another so as to first form an inner part of the portion with the lower cut of the groove and then a catch surface positioned closer to the opening of the groove. The characteristic of the flooring system is, however, indicated in the independent claim. The dependent claims define particularly preferred embodiments in accordance with the present invention. Other advantages and features of the invention are also apparent from the following description.

Prior to the description of specific and preferred embodiments of the present invention with reference to the accompanying drawings, the basic concept of the invention and the strength and function requirements will be described. The invention is applicable to rectangular floorboards having a first pair of parallel sides and a second pair 19 of parallel sides. In order to simplify the description, the first pair is hereinafter referred to as indicating the long sides and the second pair as referencing the short sides. It should be noted, however, that the invention may also be applied to square shaped plates.

High Quality Board

Because of the high quality of the joint, it is intended to design a tight and tight fit in the closed position between the floor plates in both the vertical and horizontal directions. It shall be possible to join the floorboards without very large visible intervals or without differences in level between the edges of the joint in the unloaded state and in the normal state loaded. On a high quality floor the joint intervals and level differences shall not exceed 0,2 and 0,1 mm respectively.

Tilt Up Around the Board Edge

In general terms, it should be possible to tilt the side away from a floorboard upwards so that the floorboards can be loosened. As the plates in the initial position are joined by tight flanged joints, this upward slope also has to be able to take place with the upper edge joints in contact with each other and with rotation at the joint edge. This possibility of upward slope is very important not only when replacing the floor panels or when changing a floor. Many decks are placed to be enjoyed or are improperly placed near doors, corners, etc. during installation. It is a major drawback if the floor can not be easily removed without the joint system being damaged. It is not always the case that a plate that can be tilted in can be tilted up again. In relation to the downward slope, a slight bending of the strip downwards usually takes place whereby the catch element is bent backwards and downwards and opens. If the joint system is not formed with adequate angles and radii, the plate may, after seating, be immobilized in such a way that lifting it is not possible. The short side may, after the long side joint has been opened through the upward slope, usually be drawn outwardly along the joint edge, but it is advantageous if the short side can also be opened through the upward slope. This is especially advantageous when the plates are long, for example having 2.4 m, which makes pulling the short sides difficult to pull. The upward slope must take place with great safety without the plates being trapped and being pinched together so as to cause the risk of the catch system being damaged.

Fitting

It should be possible to fasten the short sides of the floorboards through horizontal fitting. This requires that the parts of the joint system be flexible and bend. Even if the inclination into the long sides is much easier and faster than the socket, it is advantageous if the long side can also be engaged since certain seating operations, for example next to 21 doors, require the plates to be joined horizontally. In the case of a seal that can be engaged, there is a risk of an increase in joint if the joint geometry is inadequate.

Cost of Material on the Long and Short Sides

If the floor plate has, for example 1.2 x 0.2 m, every square meter of pavement surface will have about six times more long side joints than short side joints. A large amount of waste of material and expensive material from the joints is of less importance on the short side than on the long side.

Horizontal Resistance

In order to achieve a high resistance, the closure element should, as a rule, have a high closing angle so that the closure element does not disengage. The locking element must be high and wide so that it will not break when subjected to a high tensile strength when the floor shrinks during the winter as a result of the reduced relative humidity at this time of year. This also applies to the material that is closest to the closing groove in the other plate. The short side joint should have a higher strength than the long side joint because the tensile load during winter retraction is distributed over a smaller extent of joint along the short side than along the long side.

Vertical Strength 22

It shall be possible to maintain flat plates when they are subjected to vertical loads. Additionally, movement in the joint should be avoided since surfaces which are subjected to pressure and move relative to one another, for example the edges of the upper joints, can cause cracking.

Travel Capacity

In order to be able to secure all four sides it should be possible for a newly settled plate to be moved in the closed position along a pre-set plate. This should take place using a reasonable amount of force, for example through a joint thrust, using a hammer and a pack, without the edges of the joints being damaged and without the joint system having to be formed with a visible gap in the joint. horizontal and vertical direction. The displacement capacity is more important on the long side than on the short side because the friction is considerably higher there as a result of a larger joint.

Production

It should be possible to produce the joint system in a rational manner using large cutting tools having extremely high accuracy and capacity.

Measurement

Good functionality, good tolerance and production quality require that the joint profile can be continuously measured and verified. Critical parts in a mechanical seal system shall be designed in such a way that production and measurement are facilitated. It should be possible to produce them with tolerances of the order of a few thousandths of a millimeter, and it should therefore be possible to measure them with great accuracy, for example in a so-called profile projector. If the joint system is produced with linear cutting machines, the joint system shall, with the exception of certain production tolerances, have the same profile along the entire edge portion. In this way, the joint system can be measured very accurately by cutting some samples by sawing them from the floorboards and measuring them on the profile projector or a measuring microscope. However, rational production requires that the joint system can also be measured quickly and easily without destructive methods, for example using gauges. This becomes easier if certain critical parts of the locking system are as small as possible.

Long-Side and Short-Side Optimization

In order for a flooring board to be optimally fabricated at a minimum cost, the long and short sides must be optimized having regard to their different properties according to the above. For example, the long side should be optimized for downward slope, positioning and travelability, while the short side should be optimized for fit and high strength. An optimally designed floor plate should therefore have different joint systems on the long and short sides. 24

Possibility of Transverse Movement of the Board Edge

Floor boards made from wood and floor boards in general containing wood fiber will swell and shrink depending on changes in relative humidity. Swelling and shrinkage usually begin from above and the surface layers may thus move more than the core, i.e., the part from which the joint system is formed. In order to prevent the edges of the upper joint from being raised or crushed in the case of a high degree of swelling, or that there are intervals in the joints when the drying takes place, the joint system shall be constructed in such a way as to allow the movement compensate for swelling and shrinkage. The invention is based on a first understanding that when using suitable production processes, essentially through the use of machines and tools whose diameter exceeds significantly the thickness of the plate, it is possible to rationally form configurations with greater accuracy wood-based boards, and wood-based boards based on plastic materials, and this type of drawing can be done in a tongue groove remote from the joint plane. The shape of the joint system must therefore be adapted to rational production, which must be possible with very small tolerances. However, such an adaptation can not take place at the expense of other important properties of the floor plate and the closure system. The invention is further based on a second principle which is based on the knowledge of the requirements which must be satisfied by a mechanical joint system in order to ensure operation under optimum conditions. This principle has made it possible to meet these requirements in a manner hitherto unknown by a combination of a) design of the joint system with, for example, angles rays, clearances, specific free surfaces and relationships between different parts of the system, and b) the optimum utilization of the properties of the core material, such as compression, elongation, bending, tensile strength and compressive strength. The invention is further based on a third principle that it is possible to provide a joint system with a lower cost of production while its functionalities and strength can be maintained or even in some cases improved by a combination of manufacturing techniques , design of the joint, choice of materials and optimization of the long and short sides. The invention is based on a fourth principle that the joint system, the manufacturing technique and the measuring technique have to be developed and adjusted in such a way that the most important parts requiring smaller tolerances should, as far as possible, be in very small number and are designed to allow measurement and verification in continuous production.

According to the present invention there is provided a flooring system having the features of claim 1.

The floorboards may have on two sides a separable mechanical joint system, which is of a known type and which can be moved sideways in the closed position and secured by tilting inwardly around joint edges or through horizontal engagement. The floorboards have, on the other two sides, a locking system. The floor plates can also have a locking system on all four sides.

At least two opposing sides of the flooring plate thus have a joint system comprising a tongue and a tongue groove defined by upper and lower flanges, wherein the tongue at its outer and upper portions has an upwardly facing portion and that the groove of tongue that is in its inner part and superior has a cut inferior. The upwardly facing portion of the tongue and the lower cutout of the tongue groove in the upper collar have locking surfaces that act against each other and prevent horizontal separation in a direction D2 in the direction transverse to the plane of the joint. The tongue and groove of the tongue also have support surfaces which act with each other and which prevent vertical separation in a direction D 1 parallel to the plane of the joint. Such support surfaces are at least at the lower part of the tongue and at the lower edge of the tongue groove. In the upper part, the locking surfaces acting together can serve as upper support surfaces but the upper tongue groove and the tongue may preferably also have separate upper support surfaces. The tongue, tongue groove, closure member, and bottom cut are designed so that they can be made using tools having a larger diameter than the thickness of the floorboard. The tongue may, with its upwardly facing portion, be inserted into the tongue groove and has a lower cut for horizontal engagement, the lower collar being curved such that the upwardly directed portion of the tongue may be inserted in the lower cut . The lower collar is smaller than the upper collar, which facilitates the possibility of forming a lower cut with a locking surface which has a relatively high inclination with respect to the plane of the plate surface and which thereby provides a high horizontal locking force, which can be combined with a flexible lower collar. The floorboard may have two edge portions with a joint system in which the tongue with its upwardly facing portion can be inserted both into the tongue groove and into its lower cut through a docking function and can be detached of the tongue groove by an upward slope while at the same time the plates are held in contact with each other through their upper joint edges.

Alternatively or additionally, the tongue may be made flexible so as to facilitate such engagement on the short side after the long sides of the floorboard have been joined. The floor plate may have two edge portions with a joint system in which the tongue, when the plate is being secured in an upwardly inclined position, which can be engaged in the groove of the tongue and then is inclined to down through a pivoting movement around the upper joint edge. The lower collar is smaller than the upper collar so as to allow a greater degree of freedom when conceiving the lower cut of the upper collar and in particular its closure surface. The present invention further describes the basic principles which must be satisfied for a tongue and groove joint which is intended to be engaged with a minimum bending of the joint components and with the floor plate planes essentially at the same level. The present disclosure further describes how the properties of the materials can be used in order to achieve high strength and low cost in combination with the fit.

Several aspects will now be described in more detail with reference to the accompanying drawings which illustrate different embodiments. The parts of the plate which are equivalent to those of the plate according to the prior art shown in Figs. 1-2 have always received the same reference numbers.

Brief Description of Drawings

FIGS. 1a-c illustrate in a three-step process a downwardly inclined process for the mechanical connection of the long sides of the floorboards according to WO 9426999. 29 29 Figs. 2a-c Figs. 3a-b Figs. 4a - b Figs. 5a - b Figs. 6a - b Figs. 7a-b Figs. 8a-b Figs. 9a-b Figs. 10a-b Figs. 11a-b

FIGS. 12a-c illustrate in three stages a locking process for the mechanical joining of the short sides of the floor plates in accordance with WO 9426999. They illustrate a floor plate according to WO 9426999 viewed from an upper and lower plane, respectively. illustrate two different embodiments of floorboards in accordance with WO 9966151. These illustrate floorboards according to GB 1430423. They illustrate mechanical fastening systems for the long side and the short side of the boards of floor according to WO 9627721. Illustrate a mechanical closure system according to JP 3169967. They illustrate floor boards according to DE-A-1212275. illustrate a plug joint according to WO 9747834. They illustrate a plug joint according to the document FR 2675174. Schematically illustrate two parallel joint lip portions of a first preferred embodiment of a flooring board according to the present invention. illustrate the fit of a variation of the present invention. 30 30 Figs. 13a - c Fig. 14 Fig. 15 Figs. 16a-c Figs. 17a-c Fig. 18 Fig. 19 Figs. Fig. 22a - and Fig. 23a - and illustrate a downwardly and upwardly inclined process using the invention, illustrates the embodiment of a variant adapted for the production of the present invention, illustrates this variant of the invention for illustrating the withdrawal inclined upwards while using the bending and compression in the joint material, illustrates examples of a floor plate according to the invention. illustrate how the joint system should be designed to make joining easier. illustrates the engagement in an inclined position, illustrates the short side closure through engagement. illustrates the engagement of the short side side outer and inner corner portion, illustrates a joint system in accordance with the present invention using a flexible tongue. illustrates in detail the engagement of the short side outer corner portion using an embodiment in accordance with the present invention. illustrates in detail the engagement of the short side inner corner portion using an embodiment in accordance with the present invention.

Detailed Description of Preferred Embodiments 31

A first preferred embodiment of a floor plate 1, 1 'which is provided with a mechanical closure system will now be described with reference to Figs. 11a and 11b. In order to make understanding easier, the joint system is schematically illustrated. It should be noted that better functionality can be achieved with other embodiments which will be described below.

FIGS. 11a, 11b schematically illustrate a section through a joint between a long side edge portion 4a of a plate 1 and a long side edge portion 4b of another plate 1 '.

The upper sides of the plates are essentially positioned in a common plane of plane HP and the tops of the joint edge portions 4a, 4b engage with each other in a vertical vertical plane VP. The mechanical locking system results in the immobilization of the plates relative to each other both in the vertical direction D1 and in the horizontal direction D2 which extends in the direction perpendicular to the plane of the joint VP. During laying of a floor with overlapping rows of plates, a plate 1 'may, however, be disposed along the other plate 1 in a direction D3 (see Fig. 19) along the plane of the gasket VP. Such displacement may for example be used to provide connection of floorboards which are positioned in the same row.

In order to provide the joining of the two flange portions perpendicular to the vertical plane VP and parallel to the horizontal plane HP, the edges of the floor plate have, in a known manner, a tongue groove 352 in a flange portion 4a of the plate of pavement within the plane VP of the joint, and a tongue 38 formed in the other joint edge portion 4b and projecting beyond the plane of the joint VP.

In this embodiment the board 1 has a core or a core 30 made of wood which supports a wood surface layer 32 on its front side and an equilibrium layer 34 on its rear side. The plate 1 is rectangular and also has a second mechanical locking system on the two parallel short sides. In some embodiments, this second closure system may have the same design as the long side closure system, but the closure system on the short sides may also have a different design in accordance with the present invention or according to a preferred embodiment. previously known mechanical closure system.

As an illustrative non-limiting example, the floorboard may be parquet with a thickness of 15 mm, a length of 2.4 m and a width of 0.2 m. The invention may, however, also be used for parquet boards or for boards of a different size. The core 30 may be one layer type and consist of narrow blocks of wood of an inexpensive type. The surface layer 32 may have a thickness of 3-4 mm and consist of a type of hardwood and be varnished. The back-side balance layer 34 may consist of a layer of wood plywood having a thickness of 2 mm. In some cases it may be advantageous to use different types of wood materials in different parts of the wood board so that optimal properties are obtained within the individual parts of the floorboard.

As mentioned above, the boards and floor of the flooring system according to the present invention comprise a tongue groove 36 in a joint edge portion 4a of the floorboard, and a tongue 38 in the opposite joint edge portion 4b of the floor plate. The tongue groove 36 is defined by upper and lower flanges 39, 40 and is in the form of a lower groove with an aperture between the two flanges 39, 40.

The different portions of the tongue groove 36 are best illustrated in Fig. 11b. The tongue groove is formed in the core or core 30 and extends from the edge of the floorboard. Above the tongue groove is a top edge portion or joint flange surface 41 extending to the surface plane HP. Within the opening of the tongue groove there is a surface 43 which fits over or serves as a support which in this case is parallel to the plane of the HP surface. This engaging or support surface passes to an inclined catch surface 43 having a catch angle A relative to the horizontal plane HP. Within the closure surface there is a surface portion 46 forming the upper bead portion of the lower cut portion 35 of the tongue groove. The tongue groove further has a lower end 48 which extends downwardly to the lower collar 40. On the top side of this collar there is an engaging or support surface 50. The outer end of the lower collar has a gasket flange surface 52 which is positioned remote from the plane of the gasket VP. The language format is also best seen in Fig. 11b. The tongue is made of a core or core material 30 and extends beyond the plane of the gasket VP when this gasket portion 4b is mechanically attached to the gasket portion 4a of a gasket plate adjacent floor. The joint flange portion 4b further has an upper edge portion or a joint flange surface 61 which extends along the plane of the joint VP to the base of the tongue 38. The upper side of the base of the tongue has an upper surface 64 which in this case extends to an inclined catch surface 65 of a portion 8 facing upwardly adjacent the tip of the tongue. The catch surface 65 passes into a guide surface portion 66 which terminates in an upper surface 67 of the portion 8 sloped upwardly of the tongue. Thereafter the surface 67 follows a bevelled region that may serve as a guide surface 68. This extends to the tip 69 of the tongue. At the lower end of the tip 69 there is another guide surface 70 which extends obliquely downwardly to the lower edge of the tongue and the engaging or support surface 71. The support surface 71 is intended to act together with the support surface 50 of the lower collar when two of said floorboards are mechanically joined so that their upper sides are positioned in the same plane of surface HP and are in a perpendicular oriented plane of VP joint in relation thereto, so that the upper edge surface of the gasket 41, 61 of the plates engages therebetween. The tongue has a lower joint flange surface 72 which extends down to the underside. 35

In this embodiment there is the engaging or support surface 43, 64 in the groove of the tongue and tongue, respectively, which in the closed state engages with each other and which act in conjunction with the lower support surfaces 50, 71 on the lower collar and the tongue, respectively, so as to provide the closure in the direction D1 perpendicular to the surface plane HP. In other embodiments which will be described below, use is made of the closure surfaces 45, 65 as well as locking surfaces intended to be fastened together in the direction D2 parallel to the surface plane HP and as support surfaces to counteract movements in the direction D1 perpendicular to the plane of the surface. In the embodiment according to Figs. 11a, 2b, the locking surfaces 45, 65 and the engaging surfaces 43, 64 act together as upper support surfaces of the system.

As can be seen in the drawing, the tongue 38 extends beyond the plane of the joint VP and has an upwardly directed portion 8 at its free outer end or tip 69. The tongue further has a catch surface 65 which is formed of so as to act in conjunction with the inner locking surface 45 in the tongue groove 36 of an adjacent floorboard when two of such floorboards are mechanically joined so that their front sides are positioned in the same plane of surface HP and are in a VP joint plane oriented in the direction perpendicular thereto.

As is evident from Fig. 11b, the tongue 38 has a surface portion 52 between the closure surface 51 and the plane of the gasket VP. When two plates are joined, the surface portion 52 engages the surface portion 45 of the upper collar 8. In order to make it easier to insert the tongue into the lower groove through the downward slope or the groove, the tongue may, as shown in Figs. 11a, 11b have a bevelled area 66 located between catch surface 65 and surface portion 57. Additionally, a bevelled zone 68 may be positioned between surface portion 57 and tongue tip 69. The bevelled portion 66 may serve as an orientation portion having a lower tilt angle relative to the plane of the surface than the tilt angle α of the catch surfaces 43, 51. The tongue support surface 71 is in this embodiment essentially parallel to the flat surface HP. The tongue has a bevelled portion 70 between the support surface and the tongue collar 69.

According to the invention the lower collar 40 has a support surface 50 for acting in conjunction with the corresponding support surface 71 of the tongue 36. In this embodiment the support surface is positioned remote from the lower end of a groove of language. When two floorboards are joined to one another there is an engagement between the support surfaces 50, 71 and between the engaging or support surface 43 of the upper collar 39 and the corresponding engaging or supporting surface 64 of the tongue. In this way the fixing of the flats in the direction Dl perpendicular to the surface plane HP is obtained. 37

Preferably, at least the major portion of the inner portion 47 of the lower groove viewed in parallel with the surface plane HP is located furthest from the plane of the gasket VP than the outer end or tip 69 of the tongue 36 By this design the manufacture is much simpler and the movement of one floorboard relative to the other along the plane of the joint is simplified.

Another important feature of the flooring boards of the flooring system according to the present invention is that all the portions of the lower collar portions 40 which are connected to the core 30, viewed from the point C, wherein the surface plane HP and the plane of the VP joint intersect, they are located outside of an LP2 plane. This plane is located furthest from said point C than a locking plane LP1 lying in parallel with a plane LP2 that is tangent to the locking surfaces 45, 65 acting simultaneously on the groove with the lower cut 36 and with the tongue 38, where these locking surfaces are more inclined with respect to the HP surface plane. Due to this design the lower groove may, as will be described in more detail below, be made using large disk-shaped rotary tools so as to make the edge portions of the floor plates.

Another important feature is that the lower collar 40 is resilient and smaller than the upper collar 39. This allows production of the lower cut using large rotating tools which can be configured at a relatively large angle to the horizontal plane so that the closure surface 65 can be made at a wide closing angle A. The large closure angle significantly reduces the downward component which occurs associated with the tension load. This means that the joint system will have a high strength even though the lower collar is resilient and has, as such, a limited ability to counteract a descending member. This results in optimization for obtaining a high closing force in combination with the lower snap-in strength. The high resistance to fit makes the fit difficult and increases the risk of damage to the joint edges of the flooring boards. The inventor has found that most of the materials used in floorboards can be rendered sufficiently resilient when formed with flanges of suitable thickness and length that can function in the preferred joint system and provide sufficient closure force.

FIGS. 12a-c illustrate how the engagement of two floorboards is achieved by folding the lower collar 40. As is evident from Fig. 12b, the engagement is effected with a minimum bowing of the lower collar and with the surface planes of the floorboards essentially at the same level. This will reduce the risk of cracks.

FIGS. 13a-c illustrate that the closure system according to Figs. 12a-c can also be used for the upward slope and downward slope associated with the lifting and the seating. The upper and lower flanges 39, 40 and the tongue 38 are formed so as to permit the separation of two floorboards mechanically joined one of the floor panels 39 being hinged upwardly relative to one another around a hinge center near the intersection C between the surface plane HP and a joint plane VP so that the tongue of this floorboard pivots out of the lower groove of the other floorboard. The plug joint can be used on both the long side and the short side of the floorboards. Fig. 14 and Fig. 15 illustrate, however, a variant of the present invention which is above all suitable for fitting along the short side of a floor plate which is made of a relatively hard material, such as a hard type of wood or a hard fiber board.

In this embodiment, the groove of the tongue is essentially deeper than is necessary to accommodate the tongue. In this way, a greater bending capability of the lower collar 40 can be obtained. In addition, the closure system has a long tongue with a thick closure element 8. The closure surfaces 45, 65 are also substantially inclined. The dashed line indicates the snapping motion. The design according to Figs. 14 and 15 allows separation through the upward slope of one plate and the slight curving down of the lower collar 40 of the other plate. However, in other more preferred forms of the present invention, no downward bending of the lower collar is required when separating the floorboards. 40

In the closed position it is possible to move the floor plates in the longitudinal direction of the joint. Thus, the separation of, for example, the short sides can take place by pulling out in the longitudinal direction of the joint after separation of the long sides through, for example, the upward slope.

In order to make it easier to manufacture, incline inwardly, incline upward, notch and moveability in the closed position and in order to minimize the risk of cracking, all surfaces that are not so as to form a joint with tight joint edges and the vertical and horizontal joint must be formed so as not to be in contact with each other in the closed position and preferably also during closing and during opening. This allows manufacture without requiring very high tolerances in these joint portions and reduces friction in lateral displacement along the joint edge. Examples of surfaces or portions of the joint system that should not be in contact with each other in the closed position are 46-67, 48-69, 50-70 and 52-72. The joint system according to the shape of preferred embodiment may consist of various combinations of materials. The upper collar 39 may be made of a harder and harder top surface layer 32 and a softer lower part forming part of the core 30. The lower collar 40 may consist of the same softer upper portion 30 and also a soft portion lower portion 34 which may be of another type of wood. The directions of the fibers in the three types of wood may vary. This can be used to provide a joining system which resorts to the use of these properties of the materials. The closure element is thus in accordance with the invention positioned closest to the hard and rigid upper part, which is thus flexibly and compressible in a limited manner while the engaging function is formed in the lowermost portion soft and flexible. It should be noted that the joint system may also be made of a homogeneous flooring plate.

FIGS. 16a-c show an example of a flooring board according to the present invention. This embodiment specifically shows that the long side and short side joint systems are designed differently. On the short side the locking system is optimized for engagement by a high locking angle, a deep tongue groove and an upper collar of smaller size than the lower collar while at the same time the locking surfaces closure feature a low height to reduce the requirement for bending down. On the long side, the joint system is adjusted to make the connection / lifting through angular displacements.

Additionally, the joint system may consist of different materials and material combinations 30a, 30b and 30c. It is also possible to select different materials on long and short sides. For example, the groove portion 36 of the short sides may consist of a harder and more flexible wooden material than, for example, the tongue portion 38 which may be hard and rigid and have other properties than those of the core on the side long. On the short side with the tongue groove 36 it is possible, for example, to choose a type of wood 30b which is more flexible than the type of wood 30c of the other short side where the tongue is formed. This is especially convenient in parquet floors with a lamellar core when the upper and lower sides consist of different types of wood and the core consists of glued blocks. This construction gives great possibilities to vary the composition of the materials in order to optimize the functionalities, the resistance and the costs of production. It is also possible to vary the material along the length of one side. Thus, for example, blocks that are positioned between the two short sides may be of different types of wood or materials so that some may be selected relative to their contribution to suitable properties having to do with improving the settlement, resistance, etc. Different properties may be achieved with different fiber orientations on the long side and the short side, and plastic materials may be used on the short sides and, for example, on different parts of the long side. If the floorboard or parts of its core consist of, for example, multi-layer woodboard, these layers may be selected such that the upper edge, tongue and bottom collar both on the long side and the short side may all have parts with different composition of the materials, orientation of the fibers etc., which may impart different properties with respect to strength, bending ability, ability to be machined, etc.

FIGS. 17a-c illustrate the basic principle of how the lower part of the tongue is to be designed relative to the lower collar 40 so as to facilitate a horizontal fit 43 in a lower cut joint system or with a catch groove 8 in a collar upper stiffener 39 and a flexible lower collar 40. In this embodiment the upper collar 39 is significantly stiffer, among other reasons as a result of the fact that it may be thicker or may consist of harder and stiffer materials. The lower collar 40 may be thinner and softer and the essential curling will thus in conjunction with the engagement take place in the lower collar 40. The engagement can be significantly facilitated among other reasons by the maximum curving of the lower collar 40 which is limited as far as possible. Fig. 17a shows how the bending of the lower collar 40 will increase to a maximum bending level B1 which is characterized in that the tongue 38 is inserted so deeply into the groove 36 of the tongue that the guide parts in contact with each other. When the tongue 38 is further inserted the lower collar 40 will be folded back until the engagement is completed and the catch member 8 is fully inserted into its final position in the lower cut 35. The lower part and the front portion 49 of the tongue 38 should be designed so as not to bend down the lower collar 40 which, instead, should be forced downwardly by the lower support surface 50. This tongue portion 49 should have a shape that either touches or is moved away from the level maximum curvature of the lower collar 40 when this lower collar 40 folds along the outside of the lower engaging surface 50 of the tongue 38. If the tongue 38 has a shape which overlies the lower collar 40 indicated by the line a the curvature B2 according to Fig. 17b may be significantly higher. This may result in high friction associated with engagement and a risk of the joint being damaged. Fig. 17c illustrates that the maximum curl can be limited by the tongue groove 36 and the tongue 38 can be designed so that there is a space S4 between the lower part and the outside 49 of the tongue and the lower collar 40. upper ridge is rendered stiffer and the lower ridge is rendered more flexible, which reduces the risk of the ridge rising on the upper side of the floor laid as the floor shrinks and swells depending on the relative humidity of the air indoors. The greater rigidity of the upper collar in combination with the arrangement of the closure surfaces also makes it impossible for the gasket to support greater separation forces in the transverse direction of the gasket. Lowering the lower edge contributes to minimize the risk of edge edging. The horizontal fitting is usually used in association with the short side fitting after the long side closure. When fitting the long side it is also possible to engage the joint system with a plate in a position which depicts a slightly upward angle. This slightly upwardly inclined position is shown in Fig. 18. Only a small degree of curvature B3 of the lower collar 40 is required so that the guide part 66 of the closure member comes into contact with the guide portion 44 of the lower collar 40. locking groove so that the catch member can then, through the downward slope, be inserted into the lower cut 35.

FIGS. 19 and 20 further disclose a problem which can be encountered with respect to the two short sides of two plates 2a and 2b which are already joined at their long sides with another first plate 1. When the floor plate 2a is to be connected to the floor plate 2b by a snap action, the inner corner portions 91 and 92 which are closest to the long side of the first plate 1 are positioned in the same plane. This is due to the fact that the two plates 2a and 2b on their respective long sides are attached to the same floor plate 1. According to Fig. 20b, which illustrates the cut C3-C4, the tongue 38 can not be inserted in the inside the tongue groove 39 to begin curving down the lower collar 40. In the outer corner portions 93, 94 on the other long side, in the cut C3-C4 shown in Fig. 20a, the tongue 38 can be inserted into the groove of the tongue 36 so as to initiate bending down the lower collar 40 by the plate 2b which is automatically depressed and inclined upwards corresponding to the height of the closure element 8. The inventor has discovered then that there may be problems associated with the engagement of the inner corner portions in the lateral movement in the same plane when the tongue is formed with an upwardly oriented portion at its tip and is intended to be inserted into a tongue groove with a lower cut. These problems can cause a high resistance to fit and a risk of cracks in the joint system. The problem can be solved by a suitable joint design and with a choice of materials which allow deformation of the material and bending in a plurality of joint portions.

When fitting with a specially designed joints system, the following is observed. In lateral displacement, the external tongue guide portions 42, 68 and the lower collar act together and push the upwardly oriented portion or tongue locking element 8 under the outer portion of the upper collar 39. The tongue fold- and the top edge bends upwards. This is indicated by arrows in Fig. 20b. The comer portion 92 in FIG. 19 is pressed upwardly by the lower collar 40 on the long side of the plate 2b being folded and the comer portion 91 being pressed down by the upper collar on the long side of the collar which plate 2a is to be folded upwards. The joint system may be constructed so that the sum of these four deformations is so great that the catch member can slide along the upper collar and fit into the lower cut 35. It is known that it should be possible for the collar tongue 36 to widen with the socket. However, it is not known that it may be an advantage if the tongue, which should normally be rigid, should also be designed so as to be able to fold in conjunction with the socket.

One such embodiment is shown in Fig. 21. A groove or like shape 63 is made in the upper and inner part of the tongue within the vertical plane VP. The full extent PB of the tongue from its inner part to its outer part may be extended and may, for example, be made greater than half the thickness T of the floor.

FIGS. 22 and 23 illustrate how the parts of the joint system bend in association with the engagement in the inner corner portion 91, 92 (Fig. 19) and the outer corner portion 93, 94 (Fig. of pavement 2a and 2b. In order to make fabrication easier, it is only necessary that the thin collar and tongue be folded. In practical terms, of course, all parts which are subjected to pressure will be compressed and folded to a varying extent depending on their thickness, their folding ability, the composition of the materials, etc. Fig. 22a shows the outer corner portion 93, 94 and Fig. 23a illustrates the inner corner portion 91, 92. These two Figures illustrate the position when the edges of the plates come into contact with each other. The joint system is designed so that even in this position the outermost tip of the tongue 38 is located inside the outer portion of the lower collar 40. When the plates are pushed further towards each other the tongue 38 will, in the inner corner 91, 92 presses the plate 2b upwardly according to Figs. 22b, 23b. The tongue will bend downwardly and the plate 2b in the outer corner portion 93, 94 will slope upwards. 23c shows that the tongue 38 in the inner corner 91, 92 will fold downwardly. In the outer corner 93, 94 according to fig. 22c, the tongue 38 folds upwardly and the lower collar 40 folds down. According to Figs. 22d, 23d, this curving continues as the plates are further pushed towards one another, and now also the lower collar 40 folds in the inner corner 91, 92 according to Fig. 23d. FIGS. 22d, 23e illustrate the engaged position. Accordingly, the engagement can be significantly facilitated if the tongue 38 is also flexible and if the outside of the tongue 38 is positioned inside the outer portion of the lower collar 40 when the tongue and the groove come into contact with each other when the tongue plates are positioned in the same plane in connection with the recess which takes place after the closure of the floor plate along its two other sides.

There may be several variants within the scope of the present invention. The inventor has manufactured and evaluated a large number of variants in which the different parts of the joint system have been manufactured with different widths, lengths, thicknesses, angles and radii of a plurality of different plate material and homogeneous plastic and wood panels. All gasket systems were tested in an upside down position and with the grooves and inclinations of the grooves and tongue plates relative to one another and with different combinations of the systems described herein and also of the systems according to the techniques the long side and the short side. Closing systems have been manufactured in which the closure surfaces are also surfaces engaging the upper portion when the tongue and groove have had a plurality of closure elements and locking grooves, and wherein the also the collar and the lower part of the tongue have been formed with horizontal closure means in the form of a closure element and a closure groove.

Lisbon, November 5, 2007

Claims (62)

  1. A flooring system comprising a plurality of identical floorboards, which can be mechanically joined to a joint plane (VP), wherein said floorboards have a core (30), a floor a front side 2, a rear side 34 and opposing joint flange portions 4a, 4b, between which one is formed as a tongue groove 36 which is defined by upper flanges 39, and lower portion 40 and has a lower end 48 and the other is formed as a tongue 38 with a upwardly directed portion 8 at its free outer end 69, tongue groove 36 (VP) having the shape of a lower groove (36) with an aperture in an inner portion (35) and an inner catch surface (45), and at least portions of the lower collar (40) which is formed in conjunction with the floor plate core (30), and the tongue (38) has a locking surface (65) which is formed to react with the inner catch surface (45) in the tongue groove (36) of the adjacent floorboard when two of these floorboards are mechanically joined so that their sides (2) are positioned in the same plane of surface (HP) and are in the plane of the joint (VP) directed perpendicular thereto, wherein the inner locking surface (45) of the tongue groove is formed in the upper collar (39) within the lower cut-off portion (35) of the tongue groove to act in conjunction with the corresponding tongue closure surface (65), wherein said locking surface is formed in the upwardly facing portion (8) of the tongue so as to counteract the separation of the two plates mechanically joined in a direction (D2) perpendicular to the plane of the joint (VP), wherein the lower collar (40) has a support surface (50) for acting in together with a surface (71) of sup said support surfaces being intended to act together so as to counteract the relative displacement of the two plates mechanically joined in a direction (D1) perpendicular to the plane of the surface (HP), wherein all the parts of the lower collar portions (40) which are connected with the core (30) seen from the point (C) in which the surface plane (HP) and the joint plane (VP) intersect, which are located on the outside of a plane (LP2) which is positioned farthest from said plane than a closing plane (LP1) which are parallel therewith and which is tangent to the locking surfaces (45, 65) acting together the groove tongue and tongue in which they are more inclined to the plane of the surface (HP) in which the bearing surfaces (50, 71) acting together the lower collar and the tongue, viewed in parallel with the surface plane (HP) is found are positioned at a distance from, and closer to, the joint plane (VP) than the free outer end (69) of the tongue, characterized by all portions of the lower collar portions (40) that are attached to the core (30) are shorter than the upper collar (39) and end away from the plane of the joint (VP), in that the lower collar (40) is flexible, in that the upper collar (39) is stiffer than the lower collar (40), and (3) in that the upper and lower flanges of the joint flange portions (4a, 4b) are formed so as to permit the connection of a floor plate to a new floor plate by pushing together in an essentially parallel movement with the planar surface (HP) of the floor plate set to engage the parts of the closure system together during folding down of the lower collar (40) of the tongue groove.
  2. A flooring system as claimed in claim 1, characterized in that the tongue (38) is flexible.
  3. A flooring system as claimed in claim 1 or claim 2, characterized in that the joint flange portions (4a, 4b) are designed to allow the connection of a laid floor plate with a new (38) and the lower flange (40) are folded against each other by the surface of the floor plates.
  4. A flooring system as claimed in any one of claims 1-3, characterized in that the upper and lower edges of the joint edges (4a, 4b) are designed to permit the separation of the two floor plates mechanically joined through the hinge up one of the floor plates to the other around a center of articulation (C) near an intersection point between the surface plane (HP) and the plane of the joint (VP) in order to separate the tongue (38) from the other floor plate of the tongue groove (36) of the other floor plate.
  5. A flooring system according to claim 4, characterized in that the upper and lower edges of the joint edges (4a, 4b) are designed so as to permit the separation of the two floorboards mechanically joined through the (C) near a point of intersection between the surface plane (HP) and the plane of the joint (VP) in order to separate the joint (38) of the other floor plate of the tongue groove (36) of the other floor plate during folding down the lower collar.
  6. A flooring system as claimed in any one of the preceding claims, characterized in that at least the major part of the lower end (48) of the tongue groove, viewed in parallel with the surface plane (HP) (VP) than the outer end (69) of the tongue.
  7. A flooring system as claimed in any one of the preceding claims, characterized in that the support surface (71, 50) of the tongue (38) and the lower collar (40), which are designed to act together , are configured at a smaller angle to the surface plane (HP) than is the case with the locking surfaces (45, 65) of the upper collar (39) and the tongue (38). 5
  8. A flooring system as claimed in any one of the preceding claims, characterized in that the locking surfaces (45, 65) are configured essentially at the same angle with respect to the plane of the surface (HP) as a tangent relative to a circular arc which is tangent to the locking surfaces (45, 65) engaging one another at a point closest to the bottom (48) of the lower groove and having its center at the point (C) where surface plane (HP) and joint plane (VP) intersect.
  9. A flooring system as claimed in any one of claims 1-7, characterized in that the locking surfaces (45, 65) are configured at an angle greater to the surface plane (HP) than a tangent to a circular arc which is tangent to the locking surfaces (45, 65) engaging with one another at a point closest to the bottom (48) of the lower groove and having its center at the point where the surface plane (HP) and the joint plane (VP) intersect.
  10. A flooring system as claimed in any one of the preceding claims, characterized in that the upper edge (39) and the tongue (38) have contact surfaces (43, 64) which in their closed state act together with the other and which are positioned within an area between the plane of the joint (VP) and the tongue closure surfaces (45, 65) and the upper collar, the closure surfaces of which in the closed state together act as the others.
  11. A flooring system as claimed in claim 10, characterized in that the contact surfaces (43, 64) are seen from the locking surfaces that act together (45, 65) of the tongue and the upper collar , being inclined up and out of the joint plane (VP).
  12. A flooring system as claimed in claim 10, characterized in that the contact surfaces (43, 64) are substantially parallel to the surface plane.
  13. A flooring system as claimed in claim 10, claim 11 or claim 12, characterized in that the contact surfaces (43, 64) are essentially planar.
  14. A flooring system as claimed in any one of the preceding claims, characterized in that the lower groove (36) and the tongue (38) are of such a design that the outer end (69) of the tongue is positioned remote from the (36) along essentially the total distance of the locking surfaces (45, 65) of the upper collar (39) and the tongue (38) whose locking surfaces engage each other in such a way as to cause the surfaces of the collar (50, 71) of the lower collar and the tongue.
  15. A flooring system as claimed in claim 14, characterized in that a surface portion of the outer end (69) of the tongue, which is in contact with a surface portion of the lower groove (36) having a smaller extent seen in the vertical plane than the locking surfaces (45, 65) when two of such plates are mechanically joined. 7
  16. A flooring system as claimed in any one of the preceding claims, characterized in that the edge portions (4a, 4b) with their tongue (38) and the groove of the tongue (36), respectively, are so that when the floor panels are joined there is a contact surface between the edge portions (4a, 4b) along not more than 30% of the surface of the edge portion which supports the tongue (38) measured from an upper side (2) of the floorboard to its underside (34).
  17. A flooring system as claimed in any one of the preceding claims, characterized in that surfaces (71, 50) acting at the same time as the tongue (38) and the lower collar (40) are configured by describing an angle of at least 10 ° relative to the flat surface (HP).
  18. A flooring system as claimed in claim 17, characterized in that the tongue support surfaces (71, 50) and the lower collar are arranged at an angle of at most 30 ° to the flat surface (HP) .
  19. A flooring system as claimed in claim 18, characterized in that the simultaneously supporting tongue supporting surfaces (71, 50) and the lower collar are arranged at an angle of at most 20 ° to the surface flat (HP).
  20. A flooring system as claimed in any one of the preceding claims, characterized in that at least parts of the lower edge and tongue support surfaces (50, 71) are positioned a greater distance from the plane of the joint (VP) than the inclined fastening surfaces (45, 65) of the upper collar and the tongue.
  21. A flooring system as claimed in any one of the preceding claims, characterized in that the lower groove (36) and the tongue (38) are designed so as to provide a floor plate which is connected in a manner with a floor plate similar to being moved in a direction (D3) along the plane of the joint (VP).
  22. A flooring system as claimed in any one of the preceding claims, characterized in that the tongue (38) and the lower cut-off groove (36) are designed so as to permit the separation of one plate from the other by hinging plate relative to the other while maintaining contact between the plates at a point (C) of the gasket flange portions of the plates proximate the intersection between the surface plane (HP) and the plane of the gasket (VP).
  23. A flooring system as claimed in claim 22, characterized in that the tongue (38) and the lower groove (36) are designed to permit the separation of the plates through the hinge of one of the plates relative to the while at the same time the contact between the plates is maintained at a point in the plate joint edges (4a, 4b) at the intersection between the surface plane (HP) and the joint plane (VP) without there being a essential contact between the side of the tongue 9 which is facing away from the surface plane (HP) and the lower collar (40).
  24. A flooring system as claimed in any one of the preceding claims, characterized in that the distance between the closure plane (LP2) and the plane (LP1) parallel thereto, on the outside of which all the portions of the portions are located at least 10% of the thickness (T) of the floor plate.
  25. A flooring system as claimed in any one of the preceding claims, characterized in that the locking surfaces (45, 65) of the upper collar and the tongue form an angle to the flat surface (HP) of less than 90 ° more of at least 20 °.
  26. A flooring system as claimed in claim 25, characterized in that the locking surfaces (45, 65) of the upper collar and the tongue form an angle to the plane of the surface (HP) of at least 30ø.
  27. A flooring system as claimed in any one of the preceding claims, characterized in that the surfaces (71, 50) acting at the same time as the tongue and the lower collar are directed at an angle to the plane of the which is equal to or less than a tangent to a circular arc which is tangent to the support surfaces engaging one another at a point closest to the bottom groove 48 and having its center at point (C) where the surface plane (HP) and the joint plane (VP) interact, seen in cross-section through the plate. 10
  28. A flooring system as claimed in claim 27, characterized in that the support surfaces (71, 50) acting at the same time as the tongue and the lower collar are configured to be at a greater angle relative to the plane of the surface (HP) than a tangent to a circular arc which is tangent to the support surfaces engaging one another at a point closest to the bottom groove (48) and having its center at the point where the surface plane ( HP) and the joint plane (VP) intersect.
  29. A flooring system as claimed in any one of the preceding claims, characterized in that the surfaces (71, 50) acting at the same time as the tongue and the lower collar which are designed to act together are configured with a lower angle relative to the plane of the surface (HP) than the locking surfaces acting together (45, 65) of the upper collar and the tongue.
  30. A flooring system as claimed in claim 29, characterized in that the support surfaces (71, 50) of the tongue and the lower collar, which are designed to act at the same time, are inclined in the same direction but with a lower angle to the plane of the surface (HP) than the locking surfaces (45, 65) acting at the same time as the upper collar and the tongue.
  31. A flooring system as claimed in any one of claims 27-30, characterized in that the support surfaces (50, 71) form an upper angle of at least 20ø with respect to the plane of the surface (HP) of the than the support surfaces (45, 65).
  32. A flooring system as claimed in claim 31, characterized in that the support surfaces (50, 71) form an upper angle by at least 20ø with respect to the plane of the surface (HP) than the closure surfaces ( 45, 65).
  33. A flooring system as claimed in any one of the preceding claims, characterized in that the locking surfaces (45, 65) of the upper collar and the tongue are essentially flat inside of at least the portions of the surface which are sealed. intended to act at the same time with each other when two of such plates are joined.
  34. A flooring system as claimed in claim 33, characterized in that the tongue (38) has a guide surface (68) which is positioned outside the tongue closure surface (65), viewed from the (PV) and having a lower angle with respect to the surface plane (HP) than this catch surface (65).
  35. A flooring system as claimed in any one of the preceding claims, characterized in that the upper collar (39) has a guide surface (42) which is positioned closer to the opening of the tongue groove than the surface (45) of the upper collar and having an angle lower than the plane of the surface (HP) than the closure surface of the upper collar. 12
  36. A flooring system as claimed in any one of the preceding claims, characterized in that at least portions of the lower edge and tongue support surfaces (50, 71) are positioned a greater distance from the plane of the joint ( VP) than the sloping surfaces (45, 65) of the upper collar and the tongue.
  37. A flooring system as claimed in any one of the preceding claims, characterized in that the closure surface (65) of the tongue is arranged at a distance of at least 0.1 times the thickness (T) of the plate from the tip (69) of the tongue.
  38. A flooring system as claimed in any one of the preceding claims, characterized in that the vertical extent of the locking surfaces (45, 65) in action with each other is less than half the vertical extent of the lower cut (35). ) seen from the joint plane (VP) and parallel to the surface plane (HP).
  39. A flooring system as claimed in any one of the preceding claims, characterized in that the locking surfaces (45, 65) seen in vertical cross-section through the floor plate have an extension which is at most 10% of the thickness (T) of the floor plate.
  40. A flooring system as claimed in any one of the preceding claims, characterized in that the length of the tongue (38) seen in a plane 13 perpendicularly spaced apart from the plane of the joint (VP) is at least 0.3 times thickness (T) of the plate.
  41. A flooring system as claimed in any one of the preceding claims, characterized in that the tongue portion (4b) which supports the tongue and / or the portion of the joint flange (4a) supporting the groove of the tongue The tongue has a recess 63 which is positioned above the tongue 38 and ends away from the surface plane HP.
  42. A flooring system as claimed in any one of the preceding claims, characterized in that the lower groove (36) in cross-section has an outer opening portion which narrows inwardly into the shape of a funnel.
  43. A flooring system as claimed in claim 42, characterized in that the upper edge has a bevelled portion (42) at its outer edge positioned furthest from the plane of the surface (HP).
  44. A flooring system as claimed in any one of the preceding claims, characterized in that the tongue, shown in cross-section, has a tapering tip.
  45. A flooring system as claimed in any one of the preceding claims, characterized in that the tongue, in cross-section, has a forked tip with an upper tongue portion and a lower tongue portion. 14
  46. A flooring system as claimed in claim 45, characterized in that the upper and lower tongue portions are made of different materials with different material properties.
  47. A flooring system as claimed in any one of the preceding claims, characterized in that the tongue groove (36) and the tongue (38) form an integral part of the floorboard.
  48. A flooring system as claimed in any one of the preceding claims, characterized in that the upper collar (39) is thicker than the lower collar (40).
  49. A flooring system as claimed in any one of the preceding claims, characterized in that the minimum thickness of the upper collar (39) adjacent the lower cut (35) is greater than the maximum thickness of the adjacent lower collar (40) to the support surface (50).
  50. A flooring system as claimed in any one of the preceding claims, characterized in that the extension of the support surfaces is at most 15% of the thickness (T) of the floorboard.
  51. A flooring system as claimed in any one of the preceding claims, characterized in that the vertical extent of the tongue groove between the upper (39) and lower (40) edges, measured in parallel with the plane of the joint (VP ) and at the outer end of the support surface (50) is at least 30% of the thickness (T) of the floorboard.
  52. A flooring system as claimed in any one of the preceding claims, characterized in that the depth of tongue groove (36) measured from the plane of the joint (VP) is at least 2% greater than the corresponding extent of the tongue (38).
  53. A flooring system as claimed in any one of the preceding claims, characterized in that the tongue (38) has other material properties than the upper (3) or lower (40) edge.
  54. A flooring system as claimed in any one of the preceding claims, characterized in that the upper (39) and lower (40) edges are made of materials having different properties.
  55. A flooring system as claimed in any one of the preceding claims, characterized in that the closure system further comprises a second mechanical closure which is formed by a closure groove which is formed in the underside of the joint edge portion (4b) supporting the tongue (38) and extending in parallel with the plane of the joint (VP), and a locking strip (6) which is completely secured to the portion (4a) of the joint edge of the plate under the groove 36 and extends along substantially the entire length of the portion of the joint flange and has a catch member 8 projecting from the strip and that when the two said plates are mechanically joined, is received in the closing groove (14) of the adjacent plate (2). 16
  56. A flooring system as claimed in claim 55, characterized in that the locking strip (6) extends beyond the plane of the joint.
  57. A flooring system as claimed in any one of the preceding claims, characterized in that it is formed on a board having a core (30) of material made of wood and fiber.
  58. A flooring system as claimed in claim 57, characterized in that it is formed in a plate having a core (30) made of wood.
  59. A flooring system as claimed in any one of the preceding claims, characterized in that the floorboards are quadrangular with sides (4a, 4b, 5a, 5b) which are parallel in pairs.
  60. A flooring system as claimed in claim 59, characterized by having mechanical locking systems in all of its four lateral edge portions.
  61. A flooring system as claimed in claim 59 or 60, characterized in that the joint edge portion (4b) with the tongue and / or the joint edge portion (4a) with the tongue groove in a pair of parallel joint edge portions have been formed with other material properties than the joint edge portion (4b) with the tongue and / or the joint flange (4a) with the tongue groove or another pair of parallel joint flange portions. 17
  62. A flooring board for providing a flooring system according to any one of the preceding claims, by mechanically joining the flooring board with other similar floorboards in a joint plane (VP), between said floor panel (30), a front side (2), a rear side (34) and opposing joint flange portions (4a, 4b) ) between which one is formed as a tongue groove (36) which is defined by upper (39) and lower (40) flanges and has a lower end (48) and the other is formed as a tongue (38). ) with an upwardly directed portion (8) at its free outer end (69), the tongue groove (36) seen from the plane of the joint (VP), having the shape of a lower groove (36) with an aperture in an inner portion (35) and an inner locking surface (45), and less portions of the lower collar (40) which is formed in conjunction with the floorboard core (30), and the tongue (38) has a catch surface (65) which is formed to react with the closure surface (45) in the tongue groove (36) of the adjacent floorboard when two of these floorboards are mechanically joined so that their front sides (2) are positioned in the same plane of surface (HP) and are in the plane of the joint (VP) directed perpendicular thereto, wherein the inner locking surface (45) of the tongue groove is formed in the upper collar (39) within the lower cutting portion (35) of the groove of the tongue to act in conjunction with the corresponding tongue closure surface (65), wherein said locking surface is formed in the upwardly directed portion (8) of the tongue so as to counteract the separation of the two plates joined from one another in one direction (D2) p (VP), wherein the lower collar (40) has a support surface (50) for acting in conjunction with a corresponding support surface (71) on the tongue, said support surfaces being intended to act together to counteract the relative displacement of the two plates mechanically joined in a direction (D1) perpendicular to the plane of the surface (HP), wherein all the portions of the lower collar portions (40) which are connected with the (30) viewed from the point (C) in which the surface plane (HP) and the joint plane (VP) intersect, which are located on the outside of a plane (LP2) which is positioned further away of said plane than a closing plane (LP1) which are parallel therewith and which is tangent to the locking surfaces (45, 65) acting together the tongue and tongue groove in which they are more inclined relative to the plane surface plane (HP) and the support surfaces (50, 71) acting in conjunction with the lower collar and the tongue, viewed in parallel with the surface plane (HP) are positioned at a distance from and closest to the joint plane (VP ) than the free outer end 69 of the tongue, characterized in that all portions of the lower collar portions (40) which are attached to the core (30) are shorter than the upper collar (39) and end away from the collar (VP), in that the lower collar (40) is flexible, in that the upper collar (39) is stiffer than the lower collar (40), and that the upper and lower edges of the joint edge portions (4a, 4b) are formed so as to permit the connection of a laid floorboard with a new floorboard by pushing together in a substantially parallel movement with the flat surface (HP) of the floorboard set to engage the other parts of the locking system during folding down the lower collar (40) of the tongue groove. Lisbon, November 5, 2007
PT02729615T 2001-01-12 2002-01-14 Flooring system comprising a plurality of mechanically joinable floorboards PT1349994E (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SE0100101A SE519768C2 (en) 2001-01-12 2001-01-12 Locking system for mechanical joining of floorboards has a uppercut groove and a projecting tongue which snap together
SE0100100A SE523823C2 (en) 2001-01-12 2001-01-12 Locking system for mechanical joining of floorboards has a uppercut groove and a projecting tongue which snap together

Publications (1)

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PT1349994E true PT1349994E (en) 2007-11-16

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PT02729615T PT1349994E (en) 2001-01-12 2002-01-14 Flooring system comprising a plurality of mechanically joinable floorboards
PT02729616T PT1349995E (en) 2001-01-12 2002-01-14 Flooring system comprising a plurality of mechanically joinable floorboards

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KR (3) KR20090028647A (en)
CN (2) CN1233914C (en)
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AU (2) AU2002219750C1 (en)
BR (2) BR0206564A (en)
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CY (1) CY1108037T1 (en)
CZ (2) CZ305227B6 (en)
DE (2) DE60221788T2 (en)
DK (2) DK1349994T3 (en)
ES (3) ES2299570T5 (en)
HU (2) HU229924B1 (en)
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