JP6063144B2 - Wooden flooring and its manufacturing method - Google Patents

Description

  The present invention relates to a wooden floor for a building and a method for producing the same.

  For flooring used in detached houses, condominiums and other buildings, in addition to solid flooring made of solid wood, the surface of a wooden substrate made of plywood, MDF, etc., or these wooden substrates are laminated There is a decorative flooring material in which a decorative board of name wood is attached to the surface of a wooden base material (hereinafter, a laminated wooden base material is also simply referred to as a “woody base material”).

  The decorative flooring material uses plywood, which has less expansion and contraction due to moisture than solid wood, as the base material, and various coatings are applied to the surface to prevent moisture from entering the interior. It has come to be used in many construction sites because it is easy to handle with little warpage in the usage environment after construction.

  The decorative board has a thickness of about 0.2 to 0.6 mm (usually such a decorative board is referred to as a “thin board”) and a thickness of about 0.7 to 3.0 mm (usually this Such a decorative plate is called a “thick plate”.) A thin plate is manufactured by cutting a block laminated body obtained by combining and adhering a plurality of decorative material blocks with a slicer. A decorative board manufactured by such a manufacturing method is called a veneer. On the other hand, as a thick plate, in addition to a veneer, a relatively thick one is often manufactured by cutting wood with a band saw or the like. A decorative board manufactured by such a manufacturing method is called a ground board.

  The decorative flooring material using a thin plate has various advantages such as low shape change caused by moisture, so-called veneer, high production efficiency, and easy selection of parts without defects such as joints. .

  On the other hand, solid flooring that is excellent in texture as wood is being reviewed, although there are some defects, reflecting recent changes in consumer preferences regarding housing. However, as described above, solid flooring also has a demerit that the shape change caused by moisture is large. Against this background, there is an increasing demand for thick-plate decorative flooring materials that have the same wood texture as solid wood. However, the thick plate is not as good as the solid flooring, but has a demerit that the shape change caused by moisture is larger than that of the thin plate.

  As a method for preventing such a change in shape, in Patent Document 1, two types of floor materials, a pressed shape and a receiving shape, are combined with a solid wooden floor material or a wooden floor material using a thick plate, and the pressed shape is screwed. The invention which prevents the curvature of the whole flooring by doing is disclosed.

  Further, Patent Documents 2 and 3 disclose an invention in which a groove is formed on the surface of a wooden base material, and a thick plate is attached to the top thereof to reduce the valley warp of the flooring.

JP2007-239343 JP-A-8-144485 JP2004-197357

  In the wooden floor material disclosed in Patent Document 1, not only two types of members are required and the manufacturing cost increases, but also the pressing member and the lid portion of the screw stopper also cause the design properties to deteriorate.

  In the flooring materials disclosed in Patent Documents 2 and 3, since the groove is formed on the decorative board side of the base material, there is a possibility that irregularities appear on the flooring surface.

  An object of the present invention is to solve such problems of the prior art, and an object thereof is to propose a wooden flooring which has less warping and has good design and economy, and a method for producing the same.

  The present inventor has studied a wooden flooring that can reduce warpage even when a thick plate is used as a decorative material, and a method for manufacturing the same, and as a result of earnest research, the following knowledge has been obtained.

  (A) As a manufacturing method of the decorative sticking flooring material, when roughly classified, (a) a plurality of decorative material blocks are bonded to produce a block laminated body, and a decorative board having a predetermined thickness is produced from the block laminated body. , A method of affixing this to a base material and press-bonding, and (b) producing a unit decorative board of a predetermined thickness from a decorative material block, arranging the unit decorative board as designed, and attaching them with tape There is a method in which a decorative board is produced by pasting together, and this is pasted on a base material, followed by pressure bonding. In the gap between the unit decorative boards, the adhesive used for the production of the block laminate in the method (a) above, and the adhesive used for bonding the decorative board and the substrate in the method (b) above. Each exists. The unit decorative plates are fixed to each other by these adhesives, and the decorative plate as a whole is affected by moisture in the air, which causes warping in the case of a decorative material using thick plates.

  (B) In order to reduce the warp of the decorative board using the thick board, it is necessary to divide the unit decorative boards and disperse the stress. Here, a groove having a cross-sectional V shape, R shape, or the like is often provided between the bonded unit decorative plates from the viewpoint of practicality and design. For this reason, it can be considered that the unit decorative plates are separated from each other by the groove. However, it is extremely difficult to accurately insert the groove up to the boundary between the decorative plate and the base material.

  (C) Here, in order to ensure the division of the unit decorative board, as shown in FIG. 1, when the groove 30 is provided so as to reach the wooden base material 3, the cross section of the plywood used for the wooden base material 3 is exposed. However, the design properties are significantly deteriorated.

  (D) Therefore, as shown in FIG. 2, after forming the groove 30 between the unit decorative plates within the range of the thickness of the decorative plate on the surface side of the decorative plate 2 using the thick plate, the wood from the bottom of the groove By forming a thin cut groove 30a (hereinafter referred to as "dividing groove") so as to reach the base material 3, the decorative board 2 is completely divided and at the same time a wood texture close to a solid material unique to the decorative board 2. Can be maintained.

  (E) As shown in FIG. 3, the groove | channel (groove | channel which has a parting groove | channel) 31 which concerns on this invention provided between each unit decorative board is the recessed part 32 of the junction location of flooring materials at the time of constructing flooring material. Since they are similar to each other, the flooring material appears to have a unit decorative board attached separately, and therefore has an advantage of excellent design as a whole flooring.

The present invention has been made based on such findings, and the gist of the method for manufacturing the wood flooring shown in wood flooring shown in the following (1) to (3) and (4) and (5) To do.

(1) A flooring in which a decorative board composed of a plurality of unit decorative boards made of a veneer or a ground board having a thickness of 1.0 mm or more and a wooden base material are pasted, and the surface side between the unit decorative boards A wooden flooring characterized by comprising a groove formed within a thickness range of the decorative board, wherein the unit decorative boards are divided by a dividing groove at a part or all of the groove bottoms. .

  (2) The wooden flooring according to (1), wherein the dividing groove has a maximum width of 0.1 to 1.0 mm.

  (3) The wooden flooring according to (1) or (2), wherein a depth of the dividing groove in the decorative plate portion corresponds to 10 to 40% of the decorative plate thickness.

(4) A step of attaching a decorative board and a wooden substrate, each of which is formed by arranging a plurality of unit decorative boards having a thickness of 1.0 mm or more, a step of forming a groove from the surface side between the unit decorative boards, A method for producing a wooden floor material, comprising: forming a dividing groove in a part or all of the groove bottoms and dividing the unit decorative plates.
(5) performing simultaneously the process of forming a groove from the surface side between unit decorative boards, and the process of forming a dividing groove in the groove bottom part of all or a part of the groove, and dividing unit decorative boards. (4) A method for producing a wooden floor material as described above.

  According to the present invention, even a flooring using a decorative board having a thickness of 1.0 mm or more can reduce warpage due to moisture, and has a wood texture equivalent to that of a solid material, A flooring excellent in properties can be obtained.

It is sectional drawing which shows an example at the time of dividing unit decorative boards by V groove. It is sectional drawing which shows an example at the time of dividing unit decorative boards with the V-groove which has a dividing groove. It is a perspective view of this invention flooring which shows the recessed part of the groove | channel concerning this invention, and the joining location of flooring. It is sectional drawing which shows an example of the groove shape which combined the straight line and the curve. It is sectional drawing which shows an example of the groove shape which combined the straight line and the curve which have a dividing groove.

1. Floor material FIGS. 4 and 5 are sectional views of an example of the floor material of the present invention. FIG. 4 shows a cross section of a floor material in which a groove having no dividing groove is formed, and FIG. 5 shows a cross section of the floor material in which a groove having a dividing groove is formed. As the flooring 1, a laminate having a decorative board 2 and a wooden substrate 3 attached thereto is used. The decorative board 2 is formed by arranging a plurality of unit decorative boards having a thickness of 1.0 mm or more. The decorative board 2 is preferably 1.5 mm or more and more preferably 2.0 mm or more from the viewpoint of improving the wood texture. On the other hand, from the viewpoint of economy, it is preferably 5 mm or less, and more preferably less than 3 mm. Although there is no restriction | limiting in particular about the thickness of the wooden base material 3, For example, the thing of thickness 10mm can be used. Moreover, it is good to use the thickness as the whole flooring which combined the decorative board 2 and the wooden base material 3, for example, 12 or 15 mm. Although there is no restriction | limiting in particular about the magnitude | size of a flooring, For example, the thing of width 145, 150, 300, 303mm and length 909, 1818mm can be used.

2. Between the groove unit decorative plates, both vertical grooves and horizontal grooves may be provided on the surface side, or one of them may be provided. Although there is no restriction | limiting in particular about the cross-sectional shape of the groove | channel 30, For example, it can be set as the groove | channel shape normally employ | adopted as a flooring material, such as the shape which combined R curve, V groove, or a curve and a straight line. 4 and 5 show an example of a groove shape in which a straight line and a curve are combined. 4 and 5, the portions 21 and 23 are straight and the portion 22 is a curved line. Moreover, the depth of the groove | channel shown by 11 part of FIG. 4 and 5 is good to set it as the depth corresponded to 60 to 90% of decorative board thickness. If it is less than 60%, the groove is shallow and only a design similar to that obtained when a thin plate is used can be obtained, and it is difficult to obtain the merit of using a thick plate. On the other hand, if it exceeds 90%, the groove becomes deep, and the width of the groove becomes too large along with it, so that the design property may be deteriorated. A more preferred lower limit is 70%.

  Part or all of the groove 30 has a dividing groove 30a that divides the unit decorative plates at the groove bottom. The part or all of the groove means part or all of the longitudinal groove and / or part or all of the lateral groove. Although there is no restriction | limiting in particular about the cross-sectional shape of the parting groove | channel 30a, For example, it can be set as cross-sectional shapes, such as a rectangle, trapezoid, V shape, U shape, R shape, or the shape which combined the straight line and the curve. FIG. 5 shows a dividing groove having a rectangular cross-sectional shape. The maximum width of the dividing groove indicated by 13 in FIG. 5 is preferably 0.1 to 1.0 mm. If it is less than 0.1 mm, the groove width is insufficient, and it is difficult to obtain the effect of preventing warpage due to division. On the other hand, if it exceeds 1.0 mm, the dividing groove becomes conspicuous, and the design property may be deteriorated. A preferable upper limit is 0.5 mm. Moreover, the depth in the decorative board part of the parting groove | channel shown by 12 of FIG. 5 is good to set it as the depth corresponded to 10 to 40% of decorative board thickness. If it is less than 10%, it is necessary to increase the width of the groove itself, and the design is deteriorated. If it exceeds 40%, the depth of the groove itself becomes shallow, and only the same degree of design as that obtained when a thin plate is used can be obtained. There is a fear. A more preferred upper limit is 30%.

3. Manufacturing method Hereinafter, the manufacturing method of the wooden flooring which concerns on this invention is illustrated, However, It is not limited to this manufacturing method.

  First, a decorative board formed by arranging a plurality of unit decorative boards having a thickness of 1.0 mm or more and a wooden substrate are attached. There is no particular limitation on the method. For example, (a) a method in which a plurality of decorative material blocks are bonded together to produce a block laminate, a decorative board having a predetermined thickness is produced from the block laminate by a slicer, etc., and this is attached to a substrate, followed by pressure bonding And (b) a unit decorative board having a predetermined thickness is prepared from a decorative material block by a slicer, etc., and the unit decorative board is arranged so as to correspond to the decorative layer, and then bonded with a tape to prepare a decorative board. There is a method of sticking to a base material and crimping. A known apparatus can be used for cutting wood, and in addition to a slicer, a cutting machine such as a band saw or a circular saw may be used.

  Next, the decorative board manufactured by the above-mentioned process is affixed on a wooden base material. Although there is no restriction | limiting in particular about the sticking method, It is preferable to carry out using synthetic resin type adhesives, such as a phenol resin type, a melamine resin type, an epoxy resin type, a vinyl acetate resin type, an acrylic resin type, a polyurethane resin type. Thereafter, a groove is formed between the unit decorative plates on the surface side by cutting. Both vertical grooves and horizontal grooves may be formed, or one of them may be formed.

  Subsequently, a dividing groove is formed in a part or all of the groove bottoms to divide the unit decorative plates. The dividing grooves can be formed in part or all of the longitudinal grooves and / or part or all of the lateral grooves. At this time, it is necessary for the dividing groove to reach the wood substrate with some margin so as to completely divide the unit decorative board. Although there is no restriction | limiting in particular in the formation method of a parting groove | channel, For example, it can form with a circular saw or a pressing die.

  The dividing groove may be formed at the bottom of the groove after forming the groove as described above, or may be formed simultaneously with the groove.

  According to the present invention, even if it is a flooring using a decorative board having a thickness of 1.0 mm or more, warpage due to moisture can be reduced. Furthermore, it is possible to obtain a flooring material having a wood texture equivalent to that of a solid material and excellent in design. Therefore, the wood floor material of the present invention is optimal for use as an interior material of a building.

1. Flooring material2. Decorative plate 3. Wood substrate 11. Groove depth 12. 12. Depth of the cut groove on the decorative plate part Maximum width of dividing groove 21. Linear part of the groove 22. Curved portion of groove 23. Linear part of the groove 30. Groove 30a. Dividing groove 31. A groove having a dividing groove 32. Concavity at the joint between floor materials

Claims (5)

A flooring in which a decorative board composed of a plurality of unit decorative boards made of veneer or sawing board having a thickness of 1.0 mm or more and a wooden base material are attached to each other, and the makeup is applied between the unit decorative boards from the surface side. A wooden flooring comprising a groove formed within a thickness range of a board, wherein the unit decorative boards are divided by a dividing groove at a part or all of the groove bottom.   The wooden flooring according to claim 1, wherein the maximum width of the dividing groove is 0.1 to 1.0 mm.   The wood flooring according to claim 1 or 2, wherein a depth of the dividing groove in the decorative plate portion corresponds to 10 to 40% of the decorative plate thickness.   A step of attaching a decorative board and a wooden base material, each of which is formed by arranging a plurality of unit decorative boards having a thickness of 1.0 mm or more, a step of forming a groove from the surface side between the unit decorative boards, and a part of the groove or A method for producing a wooden floor material, comprising: forming a dividing groove in all groove bottoms and dividing the unit decorative plates.   A step of forming a groove from the surface side between the unit decorative plates and a step of dividing the unit decorative plates by forming a dividing groove in a part or all of the groove bottoms are performed at the same time. The manufacturing method of the wooden flooring of Claim 4.