SE508165C2 - Device for joining of flooring material - Google Patents

Abstract

In an arrangement for interconnecting adjacent pieces (1, 2) of floor covering material, edge portions of the pieces facing one another in a joint are profiled such that the profilings include mutually facing surfaces (7, 8, 15, 16, 18, 19, 20) on both pieces. On or between these surfaces, there are provided interconnecting devices (9) for interconnecting adjacent pieces. The profilings have, besides the mutually facing surfaces (7, 8, 15, 16, 18, 19, 20), guide surfaces for form-locked guiding of the pieces (1, 2) in the vertical direction in relation to one another. The mutually facing surfaces (7, 8, 15, 16, 18, 19, 20) have loose fit or slight mutual spacing, while the guide surfaces have tighter mutual fit.

Description

15 20 25 30 35 ysos 165 2 material. Differences as small as 2 / l 00-part millimeters can be fully visible and fi ill-felt, which is why a floor with such tolerances is perceived as having a poor quality.

Seen against this background, the tolerance problems offered by the increases have led to difficult quality and appearance problems with regard to floors cohesive in this current way.

Another factor that must be taken into account is that a prolonged increase under compressive load could possibly lose its cohesive properties, since the individual brims could be permanently curved or deformed.

An additional problem that could possibly arise, of course depending on the type of adhesive used, is that hard pressed fl extensions would "melt together" into a non-re-openable joint, whereby at least one of the benefits of splicing by skulle increase would be lost.

PROBLEM STATEMENT The present invention thus has for its object to design the device initially indicated in such a way that the problems with prior art are eliminated. In particular, the invention intends to design the initially indicated construction in such a way that tolerance problems are avoided and in particular tolerance problems with regard to the position of mutually facing upper surfaces on pieces of floor covering. Furthermore, the invention intends to provide a device which prevents long-term effects in used cohesion means, such as permanent deformations or "fusion". Finally, the invention also intends to provide a device which can be manufactured easily and cheaply without significant extra costs.

TROUBLESHOOTING The object underlying the invention is achieved if the device initially indicated is characterized in that the profiles in addition to the surfaces arranged at the cohesion means also comprise guide surfaces which, for shape-bound control of the pieces in height relative to each other, have mutual closer fit. than the surfaces of the cohesive means. Further advantages are achieved according to the invention if the object of the invention is also characterized by one or more of the features according to claims 2-6.

COMPILATION OF DRAWING FIGURES The invention will now be described in more detail with reference to the accompanying drawings. These show: perspektiv g in perspective two facing edge portions of a floor covering, fig g 2 in a clean end view two opposite edge portions of a floor covering in a modified embodiment thereof, fi g 3 in a view corresponding to Fig. 2 another embodiment of up fi n- Fig. 4 in a view corresponding to Fig. 2 a further embodiment of the invention, and Fig. 5 a further modified embodiment of the invention in a view corresponding to Fig. 2.

PREFERRED EMBODIMENTS Fig. 1 shows in perspective in principle how the splicing of adjacent pieces of floor material is done according to the invention. However, the detailed design i_n_t_e is performed according to the invention. The description of fi g l is therefore given only to give a better understanding of the principles, which lie behind the invention.

In l g l, the reference numerals 1 and 2 refer to pieces of a floor material, which are intended to be joined or joined according to the principles that are relevant according to the invention. The pieces 1 and 2 are preferably of identical design, so that the piece 1 (on the left in the figure) has a left edge (not shown in the drawing) which is designed in the same way as the left edge shown in the piece 2 in the figure. Conversely, of course, the opposite is true, so that paragraph 2 has a right edge (not shown in the drawing), which corresponds to the right edge of paragraph 1 according to the figure. The end faces of paragraphs 1 and 2 may be cut as shown in the figure, but may also be profiled in the manner shown with respect to paragraphs 1 and 2. Assessment 4 Evaluate paragraphs 1 and 2 have a load-bearing, disc-shaped portion 3, which may consist of chipboard, MDF board, laminated wood, solid wood, etc. Furthermore, each piece has a wear layer 4, which preferably consists of a high-pressure laminate or gluing. On the underside, the pieces have barrier layers, which prevent the pieces from settling in the event of variations in moisture content and temperature.

Alternatively, the pieces 1 and 2 in their central region in height may have a core of the same material type as the supporting portion 3. On the upper side of this core a wear layer of a relatively thick wood veneer is arranged while on the underside a corresponding barrier layer is arranged.

In the embodiment with a hard pressure laminate in the wear layer 4, this hard pressure laminate along the edges 13 and 14 is cut perpendicular to the surface spread of the wear layer. Suitably also the underlying, transverse surfaces 11 and 12, respectively, are approximately perpendicular to the surface plane of the floor covering. The fact that the margins 13 and 14 can be regarded as perpendicular, sharp corners means that even the smallest deviation in height between these lines will be clearly visible on a laid floor and will also be curved. Differences as small as 0.02 mm may be sufficient to spoil the appearance of a floor.

In the embodiment with wear layer 4 consisting of relatively thick wood veneers, the problem is smaller, since these wood veneers cannot be cut with as sharp edges as high-pressure laminates. Instead, the veneer along the edges 13 and 14 usually has smaller bevels that can possibly hide minor inaccuracies in the positions of the upper surfaces of the pieces.

Irrespective of how the pieces 1 and 2 are built up of different layers, they have proliferations along their edge portions facing each other in a joint, which on one piece comprises a groove-shaped receiving outer surface 5, in which a corresponding strip-shaped projection 6 on the other piece is removable. Suitably, the reception space and the committee are roughly complementary to each other.

The profiling on the two paragraphs 1 and 2, both according to fi g 1 and in the embodiments according to other figures, further comprises in addition to the receiving space 5 and the projection 6 in the joined state of the paragraphs facing surfaces 7 and 8. On or between these surfaces the joining means of the pieces 1 and 2, which in the embodiment shown in Fig. 1 consist of joints 9. The flocculation functions as friction means, which greatly complicate or prevent displacement between the pieces 1 and 2 in parallel with their extension 10 15 20 25 30 35 508 165 5. plan. Preferably, the surfaces 7 and 8 with the joining means are approximately parallel to the plane of propagation of the pieces 1 and 2 so that one surface 7 is turned upwards and the other surface 8 is turned downwards. Optionally, only one of the surfaces 7 and 8 can be provided with the cohesion means or the friction means for interconnecting the adjacent pieces 1 and 2.

When applying the eller or fl extensions 9, the relevant surface 7 or 8 or both are provided with a band-like application of an adhesive 10, in which short pieces of fi bristles are attached. By exposing the fibers to an electrostatic field, they will charge and repel each other, so that before the adhesive has dried or hardened they will align in directions which are substantially perpendicular or at least transverse to the planes 7 and 8 of the surfaces. . Because the surface portions coated with the bends 9 are located substantially outside the surfaces which limit the receiving space 5 and the projection 6, no problems arise with regard to the electrostatic field.

On the other hand, a coating inside a groove of the kind which the receiving space 5 represents (so also the embodiment according to ñg 2) could possibly present problems.

Joining of paragraphs 1 and 2 is done as follows. The left-hand paragraph 1 in the figure is considered to be fixed on a surface and is therefore assumed to be part of an already laid floor covering. The right-hand paragraph 2 in the figure is inclined 15-30 ° relative to the paragraph 1 so that the curved or rounded edge of the projection 1 can slide over the 9 extension 9 towards the receiving space 5. When inserting the projection 6 into the receiving space, gradually turn the right-hand piece 2 until it abuts in the same plane as the left paragraph. During this combined firing and oscillation, the 9 increases 9 engage with each other as the movement continues. Full engagement occurs only when paragraphs 1 and 2 approach the fully assembled position in a common plane. In order to minimize or completely eliminate a possible gap between the edge lines 13 and 14 of the wear layers 4 and the underlying transverse surfaces 11 and 13, it may be appropriate to subject the right edge of the right piece 2 to gentle strokes during the final phase of the pieces joining.

Thus, in the fully extended position of the paragraphs 1 and 2 according to l g l, the two increments 9 will rest on each other and also transfer load from at least the right paragraph 2 to the left 1 in the vertical direction. Hereby it is easily understood that it is the thickness of the two increments 6 which determines the height tolerance of the two edges 13 and 14 relative to each other. In the same way, these tolerances will be affected by any gradual settlements or "fusion melts" of the increases 9 or the binder 10 included in the increases.

The embodiments according to Figures 4 and 5 are based on the same splicing technique as that described with reference to Fig. 1. However, the tolerance problems mentioned above have been eliminated.

In general, the invention can be described in such a way that the proliferations, which are arranged along opposite edges of the two pieces 1 and 2, in addition to the facing surfaces 7 and 8, which are thus provided with the cohesive means or the cohesive means, also comprise guide surfaces. for shape-bound control of the pieces 1 and 2 at least in height relative to each other.

In the embodiment according to fi g 4, the right-hand piece 2 is in principle identical to the right-hand piece 2 according to fi g 1. This means that the guide surfaces for shape-controlled control in height of the pieces relative to each other can be regarded as the top and bottom of the strip-shaped projection 6.

With regard to the left-hand section 1 in the embodiment according to fi g 4, the guide surfaces can correspondingly be regarded as the upper and lower limiting surfaces of the elongate groove 5.

The left-hand piece 1 in fi g 4 differs from the left-hand piece 1 in att g 1 in that the surface 15, which supports the bend 9, is no longer a continuation of the boundary surface 7 of the groove 5. The floating surface 15 is recessed below the surface 7 a distance which is sufficient, to ensure that the height fit between paragraphs 1 and 2 is guided through the guide surfaces of the projection 6 and the groove 5. The recess of the fling surface 15 is further so large that the flinging 9 and its adhesive are relieved from excessive pressure loading so that permanent deformations in the binder or fi brema are avoided while the binder layers are prevented from “melting together”. The depression of the contact surface 15 below the surface 7 must be experimentally tested, but can be expected to be in the range 0.1-0.6 mm. 10 15 20 25 30 35 508 165 7 i In the production of the profiling of the left-hand section layer 4, no additional work arises, since all surfaces in the profiling can be milled with one and the same milling cutter.

In Fig. 5, on the right-hand piece 2, a part of the material which limited the surface 8 and which was located on the underside of the projection 6 has been eliminated so that the surface 16, to which the extension 9 is attached, is at a higher level or before - for the original surface 8. This means, among other things, that the committee 6 has a slightly deformed profile. To ensure the guide surfaces for form-retained guidance, the left-hand piece 1 in fi g 5 has been given an elevated surface 17, which lies at a certain distance above the original level indicated by dashed lines and the reference 7 ”for the lower limiting surface of the groove 5.

In Fig. 5, reference numerals 7 and 8 show the position of the facing surfaces as they appeared in the embodiment according to Fig. 1. This means that the narrow part of the downwardly facing surface 8 on the right-hand piece 2 will also form a guide surface. for pre-bonded interaction with the surface 7 on the left paragraph 1.

In the embodiment according to ñg 5, the limiting surfaces limiting the groove 5 and in particular its elevated lower limiting surface 17 together with the remaining residue of the surface 7 will thus form the guide surfaces on the left piece 1. Correspondingly, the upper surface of the projection 6 and the part of l oclming surface 16, which refers to the projection 6 to form guide surfaces together with the remaining residue of the surface 8.

In the embodiment according to Fig. 2, a splice is meant, where the splice comprises groove and tongue and groove and the groove or grooves can be located one on each groove and tongue. The left paragraph 1 has an undefined tongue with the extension 9 on the underside, while the right paragraph 2 has the groove widened in an outer portion so that an extension surface 18 is formed there, which lies below the original contour line of the groove.

In this embodiment, the guide surfaces for form-fitting steering of the pieces 1 and 2 are formed by the upper side of the tongue 6 and its outer end area and its lower, free boundary surface, ie the part of the lower surface which is not coated with fl extension 9. Correspondingly, the guide surfaces on the right-hand part 2 of the upper and inner limiting surfaces of the groove 5 and the part of the lower limiting surface of the groove which remains since the bending surface 18 is produced. 10 15 20 25 508 res 8 In the embodiments according to fi g 2, the projections have double projections and grooves. In this embodiment, the two facing surfaces 7 and 8 are both modified in shape and tolerances, so that both have extension surfaces 19 and 20, respectively, which lie within the original surfaces 7 and 8, with respect to the left piece 1, over the surface 7 and, regarding the higher paragraph 2, below the surface 8.

In the embodiment according to fi g 3, it may be appropriate to divide the "retraction" of the fl surfaces 19 and 20 inside the facing surfaces 7 and 8, respectively, approximately equally on the two pieces 1 and 2.

ALTERNATIVE EMBODIMENT Above, the eller increase or fl increases - both single and double fl increases can be used in a joint - have been used as examples of cohesion means for cohesion of adjacent pieces 1 and 2. However, strip-like material pieces can also be considered as alternative cohesion means. attaching to relevant surfaces of the profiles of the pieces offers an increased friction between the pieces. Examples of such friction means may be strip-shaped strips of rubber, plastic or sponge rubber, which may abut against equal or similar friction means but which may also abut against roughened or raw surfaces of the wood material in an adjacent piece. Further examples of useful cohesive means are an adhesive coated surface, in which a friction-increasing material is attached, for example such as sand, plastic or rubber particles, etc. Furthermore, adhesive tapes or tape-shaped applications of adhesive can be used, which, if the pieces are to be separated , may not be permanently merged. In principle, any friction-increasing device on or between opposing surfaces of the two pieces could have the function of cohesive means.

Claims (6)

10 15 20 25 30 §508 165 9 PATENT REQUIREMENTS Device for joining adjacent pieces (1, 2) of floor covering material, wherein in an earthquake facing edge portions of the pieces are profiled so that the profiles comprise facing and interlocking surfaces (7, 8, 15-20) on the two pieces, wherein on or between some of these surfaces (15, 16, 18, 19, 20) cohesive means (9) are arranged for cohesion of adjacent pieces, characterized in that the projections in addition to those at the cohesive means (9) arranged surfaces (15, 16, 18, 19, 20) also comprise guide surfaces (7, 8, 17), which, for shape-bound control of the pieces (1, 2) in height relative to each other, have a more closely fitted mutual than the surfaces at the cohesion means (9). Device according to claim 1, characterized in that the surfaces (15, 16, 18, 19, 20) arranged at the cohesive means (9) have a loose fit or some mutual distance. Device according to any one of claims 1 or 2, characterized in that the cohesive means is a means for producing increased friction between the facing surfaces (15, 16, 18, 19, 20). Device according to any one of claims 1 or 2, characterized in that the cohesive means is a means for effecting adhesion between the facing surfaces (15, 16, 18, 19, 20). Device according to any one of claims 1 or 2, characterized in that the cohesive means is a means for effecting a mechanical engagement between the facing surfaces (15, 16, 18, 19, 20). Device according to any one of claims 1 or 2, characterized in that the cohesive means is an extension (9) on at least one of the facing surfaces (15, 16, 18, 19, 20).