JP2012092513A - Wood floor material for floor heating, and floor heating unit using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wood floor material for floor heating, which allows a floor surface to have sufficient scratch resistance with a wood fiber plate and reduces upward warpage of an edge in the vicinity of a tongue portion.SOLUTION: A wood floor material 1A for floor heating comprises at least: a wood base material 10 which has a tongue portion 15 at a circumference 10c and a plurality of pipe accommodation grooves 13 to accommodate a hot water pipe 20 at a rear surface 10b; and a wood fiber plate 30 which is attached to a surface 10a of the wood base material 10. An accommodation groove portion 13a constituting a part of the pipe accommodation grooves 13 is formed in the vicinity of the tongue portion, along the tongue portion. The wood fiber plate 30 is divided at a position corresponding to the center 13c of the groove width 13b of the accommodation groove portion 13a, along a longitudinal direction L of the accommodation groove portion 13a.

Description

  The present invention relates to a wooden flooring, and more particularly to a wooden flooring suitable for floor heating having a pipe housing groove for housing a hot water pipe.

  2. Description of the Related Art Conventionally, a wooden floor material in which a surface decorative material such as a veneer, a decorative synthetic resin sheet, and decorative paper is attached to the surface of a wooden base material is known. As the woody base material, a Lauan type plywood base material, a kneaded base material in which a single layer of a core layer part is a softwood single plate and a single layer of a front and back layer is a hardwood single plate are used. In such wood-based flooring, the specific gravity of the plywood base material is as small as 0.4 to 0.6, so if you drop an object on the floor surface during floor construction or floor use, In some cases, dents were formed on the surface of the material. Further, when a chair or cabinet with a caster is moved, a dent may occur.

  In order to improve it, a wood fiber board having a high specific gravity (about 0.6 to 1.2) is pasted between the wood base material and the surface decorative material compared to the wood base material. Wooden flooring made of wood is known. Thereby, the caster resistance and the dent resistance are improved. However, wood fiber boards such as MDF have poor dimensional stability against moisture changes compared to plywood, which is a base material, and large shrinkage occurs when dried compared to wood base materials. As a result, the wooden flooring may be warped.

  In view of such a point, a wood-based flooring in which a large number of slits reaching the surface of a wood-based base material is formed on a wood fiber board has been proposed (see, for example, Patent Document 1). According to this wood-based flooring, the wood fiber board is divided into a large number of independent wood fiber pieces by the slits, so that each wood fiber piece can take an independent behavior. As a result, it is possible to reliably suppress warping of the wooden floor material due to the dimensional change of the wooden fiberboard.

JP 2007-313874 A

  By the way, as a floor heating unit, a hot water type floor heating unit that heats a floor by passing hot water through a hot water pipe is conventionally known. Is used.

  Specifically, as shown in FIGS. 8A and 8B, the floor heating unit 9 includes a hot water pipe unit 2 connected to a heat source 25 and a wooden floor material 6 laid on the floor. At least. The hot water pipe unit 2 includes a metal base sheet 21 having a rectangular shape in plan view, a long hot water pipe 22 formed in a plurality of rows of pipe patterns thereon, and an upper cover 23 covering these. ing. Furthermore, the wooden flooring 6 is obtained by sequentially laminating a wooden base 61, a wooden fiber board 62, and a surface decorative material 63, and the back surface covers the hot water pipe 22 accommodated in the upper cover 23. As described above, a pipe receiving groove 65 is formed along the pattern.

  Here, when the wooden flooring 6 having the pipe housing groove 65 is used, the portion 62a of the wood fiber board 62 arranged immediately above the pipe housing groove 65 has moisture from the back side compared to the other portions. This phenomenon becomes remarkable when the hot water is passed through the hot water pipe 22 easily. Thereby, the wood fiber of this part 62a shrink | contracts more compared with another part. Further, the thickness of the portion of the wood-based substrate 61 where the pipe accommodation groove 65 is formed is thinner than the thickness of the other portions, so that the vicinity of the pipe accommodation groove 65 is caused by the contraction of the wood fiber board 62. Easy to deform.

  In particular, as shown in FIG. 9, when contraction occurs in the direction of the arrow in the figure in the portion 62a of the wood fiber board 62 immediately above the housing groove 65a in the vicinity of the male real part 67a and the female real part 67b, the wood system is caused by the contraction. The end of the floor material in the vicinity of the male part 67a and the female part 67b of the base material 61 warps up. However, as in Patent Document 1, for example, when a plurality of slits are simply provided in a wood fiber board, it is possible to suppress the overall warping of the flooring material, but sufficiently suppress the warping of the end near the real part. I can't.

  The present invention has been made in view of such problems, and the object of the present invention is to ensure the scratch resistance performance of the floor surface by the wood fiber board and to suppress the warping of the end near the real part. It is to provide a wooden flooring for floor heating that can be used.

  As a result of intensive studies, the inventors have grasped the relationship between the direction of the shrinkage of the wood fiber and the strength of the wood floor material in order to suppress the warpage in the vicinity of the real part of the wood floor material. It was found that it is important to control the shrinkage of the wood fiber board at a more optimal position and suppress the shrinkage.

  The present invention is based on this new knowledge, and the wood floor material for floor heating according to the first invention has a plurality of pipe housings in which a real part is formed at the periphery and a hot water pipe is housed on the back surface. A wood-based base material in which grooves are formed, and a wood fiber board attached to the surface of the wood-based base material, and a part of the pipe housing grooves in the vicinity of the real part A wood floor material for floor heating formed along the real part, wherein the wood fiber board is located at the center of the groove width of the housing groove and along the groove longitudinal direction of the housing groove In the above, it is divided.

  When floor heating is performed using the wooden flooring for floor heating according to the first invention, in the housing groove formed near the real part and along the real part, the wood of the woody base material in the vicinity thereof and Moisture of the wood fiber board is easily removed. Thereby, the wood fiber of this part wood fiber board will shrink | contract greatly compared with another part.

  Therefore, according to the first invention, the wood fiber board is divided at the center of the groove width of the housing groove and along the groove longitudinal direction of the housing groove. The wood fiber board located in the center and the wood fiber board located in the vicinity of the actual part contract independently from each other across the center. That is, the wood fiberboard located in the center contracts toward the center across the division position, and the fibers of the wood fiberboard located near the real part contract toward the end side (real part side).

  As a result, it is possible to suppress warping of the end portion in the vicinity of the real part of the wooden floor material. Furthermore, since the wood fiber board is stuck on the surface of the wood base material, the scratch resistance of the floor surface can be ensured.

  As a more preferable aspect according to the first invention, the wood-based base material includes a width direction veneer in the fiber direction along the groove width direction and a length direction veneer in the fiber direction along the groove length direction. It is a plywood laminated so as to have a plurality of layers, and the thickness of the single plate in the width direction from the bottom of the accommodation groove to the surface of the wood base is from the bottom of the accommodation groove to the surface of the wood base. It is thicker than the thickness of the longitudinal single plate.

  Since the single-plate fibers are arranged along the groove width direction (in the same direction as the groove width direction) in the width direction single plate constituting the wooden base material of this aspect, when drying the wooden base material, The shrinkage of the wood in the groove width direction is smaller than the shrinkage of the wood in the groove longitudinal direction. On the other hand, since the single plate fibers are arranged along the longitudinal direction of the groove (in the same direction) in the longitudinal direction single plate constituting the wooden base material, the drying of the wooden base material is performed in the longitudinal direction of the groove. The shrinkage of the wood is larger than the shrinkage of the wood in the groove width direction.

  Therefore, the total thickness of the single veneer in the width direction is the total thickness of the single veneer in the longitudinal direction in the portion where the floor material is thin due to the formation of the accommodating groove, that is, the portion from the bottom of the accommodating groove to the surface of the wood base. The contraction of the wood fiber board in the groove width direction can be suppressed by the width direction single plate. Thereby, the curvature of the edge part near a real part can be suppressed further.

  In addition, the wooden flooring for floor heating according to the second invention is a wood-based base material in which a real part is formed at the periphery and a plurality of pipe-accommodating grooves for accommodating hot water pipes are formed on the back surface, A wood-based buffer plate attached to the surface of the wood-based base material, and a part of the pipe housing groove is formed along the real part in the vicinity of the real part. A wooden flooring for floor heating, wherein the wooden buffer plate is disposed so as to be adjacent to the wooden fiberboard disposed in the center of the surface of the wooden substrate, A wood veneer having a specific gravity higher than that of the wood base material, the wood veneer being positioned along the longitudinal direction of the accommodation groove and covering the accommodation groove from the periphery in the groove width direction The fiber direction of the wood veneer is in the groove longitudinal direction of the housing groove And, characterized in that it intersects.

  When floor heating is performed using the wooden flooring for floor heating according to the second aspect of the invention, moisture is easily removed from the housing groove, as in the first aspect of the invention. Therefore, according to the second invention, the fiber direction of the wood veneer intersects the groove longitudinal direction of the housing groove, so the dimensional change of the wood veneer in the groove width direction with respect to moisture change is Small compared to dimensional change of wood fiberboard (high dimensional stability).

  Thereby, even if moisture easily escapes in the housing groove, the wood veneer extends along the groove longitudinal direction of the housing groove and from the periphery to the position covering the housing groove in the groove width direction. Since they are arranged, there is almost no dimensional change of the wood veneer just above the housing groove in the groove width direction.

  As a result, since there is almost no dimensional change in the groove width direction in the vicinity of the housing groove, it is possible to suppress warping of the end portion in the vicinity of the real part of the wooden flooring. In addition, a wood-based cushioning board consisting of a wood veneer with a specific gravity higher than that of the wood-based substrate and a wood fiberboard is attached to the surface of the wood-based substrate, ensuring the scratch resistance of the floor surface. can do.

  As a more preferred embodiment according to the second aspect of the invention, the wood-based base material includes a width direction single plate in the fiber direction along the groove width direction and a length direction single plate in the fiber direction along the groove length direction. It is a plywood laminated so as to be a plurality of layers, and the thickness of the width direction single plate from the bottom of the accommodation groove to the surface of the wood base is combined with the thickness of the wood single plate, the thickness of the accommodation groove It is thicker than the thickness of the longitudinal veneer from the bottom to the surface of the woody base material.

  The shrinkage of the wood of the width direction veneer and the wood veneer constituting the woody base material of this embodiment is smaller than the shrinkage of the wood of the groove longitudinal direction veneer. Therefore, in the portion having a small thickness due to the formation of the housing groove, i.e., the portion from the bottom of the housing groove to the surface of the wooden base material, the total thickness of the width direction veneer and the thickness of the wood veneer, Since it is thicker than the total thickness of the longitudinal direction single board, shrinkage | contraction of the wood fiber board of a groove width direction can be suppressed by the width direction single board and a wood single board. Thereby, the curvature of the edge part near a real part can be suppressed further.

  In the first and second inventions, the “thickness of the width direction single plate from the bottom of the housing groove to the surface of the wood base” refers to the width direction from the bottom of the housing groove to the surface of the wood base. When there are a plurality of single plates, these are the total thickness (total thickness), and the same applies to the case of a single plate in the longitudinal direction.

  As a still more preferable form of the first and second inventions, the wooden base material is a rectangular base material having a long side and a short side, and the housing groove is formed along the short side direction. ing. According to this aspect, when the accommodation groove portion is formed along the short side direction, the short side end portion is likely to warp due to the contraction of the wood fiber board as compared with the case where the accommodation groove portion is formed along the long side direction. Therefore, it is possible to suppress the warping more effectively. Furthermore, a warm water pipe can be accommodated in the pipe accommodation groove | channel of the wood type floor material mentioned above, and it can be set as a floor heating unit.

  According to the wood floor material for floor heating according to the present invention, it is possible to ensure the scratch resistance performance of the floor surface and to suppress warping of the end portion near the real part during floor heating.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic diagram explaining an example of the floor heating system which concerns on embodiment of 1st invention, (a) is a perspective view of a floor heating system, (b) is a wood type base in the state which abbreviate | omitted the surface cosmetics. The disassembled perspective view which showed the arrangement | positioning relationship between a material and a wood fiber board. The typical perspective view of the wooden type flooring containing the cross section which follows the AA line of FIG.1 (b). The figure for demonstrating the state of the real part vicinity of the wood type flooring in the floor heating system shown in FIG. It is a typical perspective view of the wooden flooring of the floor heating system which concerns on embodiment of 2nd invention, and is a typical perspective view equivalent to FIG. 2 of 1st invention. The figure for demonstrating the state of the real part vicinity of the wood type flooring in the floor heating system shown in FIG. The disassembled perspective view which showed the arrangement | positioning relationship between a wood type base material and a wood fiber board in the state which abbreviate | omitted the surface cosmetics which concern on another aspect. It is typical sectional drawing of the wooden type flooring which concerns on Examples 1-3 and Comparative Examples 1 and 2, (a) is sectional drawing of the wooden type flooring concerning Example 1, (b) is an Example. 2 is a cross-sectional view of a wooden flooring according to Example 3, (c) is a cross-sectional view of a wooden flooring according to Example 3, (d) is a cross-sectional view of a wooden flooring according to Comparative Example 1, (e) These are sectional drawings of the wooden type flooring which concerns on the comparative example 2. FIG. It is a schematic diagram explaining an example of the floor heating system which concerns on the past, (a) is a perspective view of a floor heating system, (b) is sectional drawing which follows a BB line. The figure for demonstrating the state of the real part vicinity of the wood type flooring in the floor heating system shown in FIG.

Hereinafter, the present invention will be described based on some embodiments.
Drawing 1 is a mimetic diagram explaining an example of a floor heating system concerning an embodiment of the 1st invention, (a) is a perspective view of a floor heating system, and (b) is in the state where surface cosmetics were omitted. It is the disassembled perspective view which showed the arrangement | positioning relationship between a wood type base material and a wood fiber board. FIG. 2 is a schematic perspective view of the wooden flooring including a cross section taken along the line AA in FIG. 1B, and FIG. 3 is an illustration of the wooden flooring in the floor heating system shown in FIG. It is a figure for demonstrating the state of a part vicinity.

  As shown in FIG. 1, the floor heating system 100 according to this embodiment includes at least a hot water pipe unit 2 and a wooden flooring 1 </ b> A laid on the hot water pipe unit 2. The hot water pipe unit 2 has the same structure as that shown in FIG. More specifically, the hot water pipe unit 2 includes a base material sheet 21 made of metal such as aluminum placed on the floor base surface. The base sheet 21 has a rectangular shape in plan view, and a long hot water pipe 22 formed in a pipe pattern having a plurality of rows of linear portions 22a and U-turn portions 22b on both ends thereof is substantially the entire surface. Placed over. An upper cover 23 having the same size as the base material sheet 21 and having a pipe housing part 23a is placed so as to cover the hot water pipe 22 and the hot water pipe 22 is housed in the pipe housing part 23a. The whole of the sheet 21 and the upper cover 23 is integrated by adhesively laminating at least four portions around the upper cover 23 using an appropriate adhesive. Further, the hot water pipe 22 of the hot water pipe unit 2 forms a closed hot water circulation channel with a heat source 25 such as a boiler, and a hot water circulation system for a floor heating floor is constructed.

  The hot water pipe unit 2 is laid with a plurality of wood floor materials 1A for floor heating. The wooden base material 10 constituting each wooden floor material 1A is a rectangular base material having long sides and short sides, and a male real part 15a and a female real part 15b are formed on the peripheral edge 10c. Yes. By engaging the male real part 15a and the female real part 15b, the wooden floor materials can be connected to each other.

Further, the wood fiber board 30 and the surface decorative material 40 are sequentially attached to the surface 10a of the wood substrate 10 by, for example, a vinyl acetate adhesive. The wooden base material 10 is, for example, a normal plywood made of broad-leaved trees or conifers, and Lauan plywood is used in this embodiment. Moreover, as a wood fiber board, MDF is used and a hard fiber board etc. may be sufficient. The thickness of the wood fiber board MDF is about 0.3 to 6.0 mm, and the density is about 0.6 to 1.2 g / cm ³ . Furthermore, as the surface decorative material 40, for example, a veneer made of oak, birch, beech, teak, etc., preferably a veneer having a thickness of about 0.2 to 1.0 mm, a synthetic synthetic resin sheet, a metal sheet, For example, a decorative paper such as a thin paper printed with a decorative grain.

  On the other hand, a plurality of pipe housing grooves 13 along the pattern are formed on the back surface of each wooden base material 10 so as to cover the hot water pipe 22 housed in the pipe housing portion 23a from above. In the pipe housing groove 13, a housing groove 13a is formed in the vicinity of the male part 15a and female part 15b in the short side direction along the male part 15a and female part 15b in the short side direction.

  As shown in FIGS. 1B and 2, the wood fiber board 30 includes a center 13 c (position along the center line) of the groove width 13 b of the housing groove 13 a and a groove longitudinal direction L of the housing groove 13 a. Are divided into a central wood fiber piece 31 and a pair of end wood fiber pieces 32. The groove longitudinal direction L and the short side direction are the same direction, and the groove width direction W and the long side direction are the same direction.

  As a method for dividing the wood fiber board, for example, a wood base material 10 and a wood fiber board are pasted, and from the surface decorative material side, laser processing, water jet processing, ultrasonic cutter, By cutting with a conventionally known processing means such as an end mill (router), a saw (round saw, etc.), a knife blade, a Thomson blade, etc., the wood fiber board 30 is made to have a central wood fiber piece 31 and a pair of ends. It may be divided into partial wood fiber pieces 32. Alternatively, the central wood fiber piece 31 and the pair of end wood fiber pieces 32 may be individually manufactured and adhered to the surface of the wood base 10.

  Furthermore, as shown in FIG. 2, the wood-based substrate 10 is made of the aforementioned Lauan plywood, specifically, the width direction single plates 11 b and 11 d in the fiber direction along the groove width direction W, and the groove longitudinal direction. The longitudinal direction single plate 11a, 11c, 11e of the fiber direction along L consists of the plywood laminated | stacked alternately so that it might become multiple layers. In the present embodiment, a 5-ply plywood is used, but the number of plies is not particularly limited.

  Moreover, the thickness t2 of the width direction single plate 11b from the bottom part 13f of the accommodation groove part 13a to the surface 10a of the wood type base material 10 is the longitudinal direction single plate from the bottom part 13f of the accommodation groove part 13a to the surface 10a of the wood type base material 10. It is thicker than the thickness t1 of 11a.

  Then, the wooden floor 1A is laid on the hot water pipe unit 2, and the hot water is passed through the hot water pipe 22 to perform floor heating. At this time, in the pipe housing groove 13 including the housing groove portion 13a, the moisture of the wood of the woody base material 10 in the vicinity thereof and the wood fiber of the wood fiber board 30 is easily removed.

  Therefore, in the present embodiment, the wood fiber board 30 is placed at the center 13c of the groove width 13b of the housing groove 13a and at the position along the groove longitudinal direction L of the housing groove 13a, and the central wood fiber piece 31 and the pair of end portions. Since the wood fiber piece 32 is divided, the wood fiber of the central wood fiber piece 31 and the wood fiber of the end wood fiber piece 32 are contracted independently across the center 13c of the groove width 13b. Become. As a result, it is possible to suppress the warping of the end near the real part. Furthermore, since the wooden fiber board 30 is stuck on the surface of the wooden base material, the scratch resistance of the floor surface can be ensured.

  Further, since the single plate fibers are arranged along the groove width direction W in the width direction single plate 11b, the shrinkage of the wood in the groove width direction W is reduced in the groove longitudinal direction L when the wooden base material 10 is dried. Small compared to the shrinkage of wood. Accordingly, the thickness t2 of the width direction veneer 11b is the longitudinal direction in the thin portion of the flooring 1A due to the formation of the accommodation groove portion 13a, that is, the portion from the bottom 13f of the accommodation groove portion 13a to the surface of the woody base material 10. Since it is thicker than the thickness t1 of the veneer 11a, the shrinkage of the wood fiber board 30 in the groove width direction W can be suppressed by the width direction veneer 11b. Thereby, the curvature of the edge part near a real part can be suppressed further.

  FIG. 4 is a schematic perspective view of a wooden floor material of a floor heating system according to an embodiment of the second invention, which is a schematic perspective view corresponding to FIG. 2 of the first invention, and FIG. It is a figure for demonstrating the state of the real part vicinity of the wood type flooring in the floor heating system shown in FIG. FIG. 6 is an exploded perspective view showing an arrangement relationship between the wood-based base material and the wood fiber board in a state where the surface decorative material according to another aspect is omitted.

  In this embodiment, the embodiment shown in FIG. 1 is different from the embodiment shown in FIG. 1 only in the structure of the wood fiber board (wood buffer board) of the wood floor material, and the other apparatus configuration is the same. Accordingly, only the wooden flooring will be described, and the other components will be denoted by the same reference numerals and detailed description thereof will be omitted.

  As shown in FIG.4 and FIG.5, the wooden flooring 1B which concerns on this embodiment is a rectangular-shaped base material which consists of a long side and a short side similarly to the wooden flooring 1A mentioned above, The periphery Are formed with a male real part 15a and a female real part 15b. A wooden buffer plate 30A and a surface decorative material 40 are sequentially attached to the surface 10a of the wooden substrate 10 by, for example, a vinyl acetate adhesive.

  On the other hand, a plurality of pipe housing grooves 13 along the pattern are formed on the back surface 10b of each woody base material 10 so as to cover the hot water pipe 22 housed in the pipe housing portion 23a from above. In the pipe housing groove 13, a housing groove 13a is formed in the vicinity of the male part 15a and female part 15b in the short side direction along the male part 15a and female part 15b in the short side direction.

  The wood buffer plate 30 </ b> A includes a wood fiber plate 33 disposed at the center of the surface 10 a of the wood substrate 10, and a wood single plate 34 disposed so as to be adjacent to the wood fiber plate 33. The wood fiber board 33 is made of the same material as described above. The specific gravity of the wood veneer 34 is about 0.6 to 1.2, which is a material higher than the specific gravity (0.4 to 0.6) of the wood base 10. Examples of the wood veneer 34 include hardwood and the like, and hardwood such as birch, beech, oak, zelkova, mahogany, teak, apiton, capol, and the like.

  Such wood veneer 34 is arranged from the peripheral edge 10c to the position P covering the accommodation groove 13a along the groove longitudinal direction L of the accommodation groove 13a and in the groove width direction W. The fiber direction of the wood veneer 34 is orthogonal to the groove longitudinal direction L of the housing groove 13a. In the present embodiment, the fiber direction of the wood veneer 34 is orthogonal to the groove longitudinal direction L of the housing groove portion 13a. However, if the contraction with respect to moisture change in the groove width direction W can be suppressed, a predetermined value may be used. At this angle, the fiber direction of the wood veneer 34 may intersect the groove longitudinal direction L of the housing groove 13a.

  Further, the wood-based base material 10 includes width direction single plates 11b and 11d in the fiber direction along the groove width direction W, and length direction single plates 11a, 11c and 11e in the fiber direction along the groove length direction L. A plywood laminated to form a plurality of layers (a plurality of plies). In the present embodiment, a 5-ply plywood is used, but the number of plies is not particularly limited.

  The total thickness t3 + t5, which is the sum of the thickness t5 of the width direction single plate 11b and the thickness t3 of the wood single plate 34 from the bottom portion 13f of the storage groove portion 13a to the surface 10a of the woody base material 10, is It is thicker than the thickness t4 of the longitudinal single plate 11a up to the surface 10a of the woody base material 10.

  According to the present embodiment, the fiber direction of the wood veneer 34 is orthogonal to the groove longitudinal direction L of the housing groove 13a, so the dimensional change of the wood veneer W in the groove width direction W with respect to moisture change is It is smaller than the dimensional change of the wood fiber board 33. Thereby, even if it becomes easy for moisture to escape in the accommodation groove portion 13a, the wood veneer 34 is disposed along the groove longitudinal direction L of the accommodation groove portion 13a and from the peripheral edge 10c in the groove width direction W. Since it arrange | positions to the position which covers 13a, there is almost no dimensional change of the wood veneer just above the accommodation groove part in the groove width direction W.

  As a result, since there is almost no dimensional change in the groove width direction W from the bottom portion 13f of the housing groove portion 13a to the surface of the wood base material 10, it is possible to suppress the warping of the end portion near the real part of the wood floor material 1B. it can. Furthermore, the floor surface of the wood base material 10 is attached to the surface of the wood base material 10 because the wood buffer plate 30A composed of the wood veneer 34 having a specific gravity higher than that of the wood base material 10 and the wood fiber board 33 is attached. Can be ensured.

  Further, since the single plate fibers of the width direction single plate 11b and the wood single plate 34 are arranged along the groove width direction W, the shrinkage of the wood in the groove width direction W does not occur when the wooden base material 10 is dried. The shrinkage of the wood in the groove longitudinal direction L is small. Therefore, in the portion having a small thickness due to the formation of the accommodation groove portion 13a, that is, the portion from the bottom 13f of the accommodation groove portion 13a to the surface of the wood base material 10, the total thickness of the width direction veneer 11b and the wood veneer 34 is combined. Since the thickness t3 + t5 is thicker than the thickness t4 of the longitudinal direction single plate 11a, shrinkage of the wood fiber board 30 in the groove width direction W can be suppressed by the width direction single plate 11b and the wood single plate 34. Thereby, the curvature of the edge part near a real part can be suppressed further.

  Moreover, in this embodiment, although the lauan plywood was used for the wood type base material 10 which comprises the wood type flooring 1B, for example, as shown in FIG. A wood fiber board 33 is arranged on a molded body 10A integrally formed with a wood veneer and a wood base material, and a surface decorative material (not shown) is further laminated to form a wood base. It is good also as flooring 1C.

The woody flooring of the first and second inventions will be described below according to examples.
[Example 1]
Example 1 below is an example of a wooden flooring according to the first invention, and a wooden flooring was produced and evaluated according to the following procedures (1) to (7).
(1) A 945 mm × 1840 mm × 11.0 mm (thickness) lauan plywood was prepared as a wood-based substrate. Specifically, as shown in FIG. 7 (a), from the surface of the wood base material, along the longitudinal direction single plates 11a, 11c, 11e in the fiber direction along the groove longitudinal direction L, and along the groove width direction W. 5 ply lauan plywood in which the width direction single plates 11b and 11d in the fiber direction are alternately laminated, and the single plate having a thickness of 0.4 mm, 3.2 mm × 3 layers, and 1.0 mm in order from the surface. Are laminated.
(2) MDF with 945 mm × 1840 mm × 1.0 mm (thickness) and specific gravity of 0.85 was prepared.

(3) The lauan plywood and MDF as a wood fiber board were bonded together with a vinyl acetate adhesive. The adhesive was applied to the side of the plywood at an amount of 16 g / scale angle, MDF was placed, a pressure of 8 kg / cm ² was applied, and pressing was performed with a cold press for 60 minutes.
(4) After curing the laminated base material obtained in (3) for one day, the position to be the center 13c of the groove width of the accommodation groove 13a before grooving (specifically, the position at a distance d37.875 mm from the end) And MDF was divided | segmented into the center wood fiber piece 31 and a pair of edge part wood fiber piece 32 in the position along the groove longitudinal direction of the accommodation groove part 13a. A cut was made with a blade whose depth of cut was fixed at 1.0 mm, and then polishing was performed until the MDF had a thickness of 0.6 mm. A knife having a thickness of 0.4 mm was used. When dividing the MDF, a laser processing machine may be used to set the laser processing conditions to, for example, a processing speed of 2000 mm / min, an output of 60 W, a frequency of 300 Hz, and air as an assist gas.

(5) Three rows of 1 × 6 scale, 0.3 mm thick oak veneers were attached to the laminated base material obtained after the MDF division obtained in (4). The adhesive used was a urea resin + vinyl acetate mixed adhesive, which was applied to the surface of the MDF at an amount of 8 g / angle, put a veneer, and pressed for 1 minute at a pressure of 8 kg / cm ² and 120 ° C hot press. did.
(6) The flooring (floor base plate) obtained in (5) was divided into three parts, and actual processing was performed on the periphery thereof, and colored wiping coating, undercoat coating, and transparent topcoat coating were performed. Furthermore, groove processing was performed so that a pipe receiving groove having a groove width w of 15 mm, a depth of 7.7 mm, and a bottom portion of R3.0 mm was formed with the position at a distance d of 37.875 mm from the end as the center of the groove width. A wood floor was used. In addition, in the portion from the bottom of the housing groove to the surface of the wooden base material, the thickness of the width direction single plate is 2.9 mm, the thickness of the longitudinal direction single plate is 0.4 mm, and the thickness of the width direction single plate is It is thicker than the thickness of the longitudinal single plate.
(7) The wooden flooring obtained in (6) was assembled in a hot water pipe unit, floor heating was performed under predetermined conditions, and the warpage of the end of the wooden flooring was measured. The results are shown in Table 1.

[Example 2]
In the same manner as in Example 1, a wooden flooring was produced and evaluated. The difference from Example 1 is (1) the structure of the woody base material. Specifically, as shown in FIG. 7 (b), from the surface of the wood base material, the longitudinal single plates 11a, 11c, 11e, 11g in the fiber direction along the groove longitudinal direction L, and the groove width direction W 7-ply lauan plywood in which the width direction single plates 11b and 11d in the fiber direction are alternately laminated, and in order from the surface, have a thickness of 0.63 mm, 19.5 mm × 5 layers, 0.62 mm A single plate is laminated. Therefore, due to the groove processing of the storage groove portion, the total thickness (total thickness) of the width direction single plate is 1.35 mm and the total thickness of the longitudinal direction single plate (total thickness) in the portion from the bottom portion of the storage groove portion to the surface of the wooden base material ( The total thickness) is 1.95 mm, and the total thickness of the width direction single plate is smaller than the total thickness of the longitudinal direction single plate. Table 1 shows the measurement results of the warpage of the end of the wooden flooring.

[Example 3]
Example 3 below is an example of a wooden flooring according to the second invention. The difference from Example 1 is that in (2), 945 mm × 1666.5 mm × 1.0 mm (thickness) , MDF 34 having a specific gravity of 0.85 and a pair of hardwood veneers (cover material) 33 of 945 mm × 86.75 mm × 1.0 mm (thickness) are prepared. It is the point which stuck together to Lauan plywood. In addition, in the part from the bottom part 13f of the accommodation groove part 13a to the surface of the woody base material 10, the total thickness of the combined thickness of the width direction veneer and the wood veneer 34 is 3.5 mm, and the thickness of the longitudinal direction veneer is It is 0.4 mm, and the total thickness of the combined thickness of the width direction veneer and the wood veneer 34 is larger than the thickness of the longitudinal direction veneer. Table 1 shows the measurement results of the warpage of the end of the wooden flooring.

[Comparative Example 1]
In the same manner as in Example 1, a wooden flooring was produced and evaluated. The difference from the first embodiment is that an MDF 62 that does not divide the MDF is used. Table 1 shows the measurement results of the warpage of the end of the wooden flooring.
[Comparative Example 2]
In the same manner as in Example 2, a wooden flooring was produced and evaluated. The difference from the second embodiment is that an MDF 62 that does not divide the MDF is used. Table 1 shows the measurement results of the warpage of the end of the wooden flooring.

[Results and discussion]
In the order of Example 3, Example 1, Example 2, Comparative Example 1, and Comparative Example 2, the warpage of the end portion was reduced. The warp at the end of the wooden flooring in Example 3 was small because a hardwood veneer was placed immediately above the accommodation groove, and the wood in the vicinity of the accommodation groove was MDF against moisture change. This is considered to be because it was hardly affected by the shrinkage (shrinkage in the arrow direction in FIG. 7C).

  In addition, in the case of Examples 1 and 2, the amount of warpage of Examples 1 and 2 was smaller than that of Comparative Examples 1 and 2, with the center of the groove width of the housing groove part sandwiched, The central wood fiber piece 31 and the end wood fiber piece 32 are individually shrunk (shrinkage in the direction of the arrows in FIGS. 7A and 7B), and in the case of Comparative Examples 1 and 2, it is directed toward the center of the groove width. This is considered to be due to contraction (contraction in the direction of the arrow in FIGS. 7D and 7E).

  Furthermore, in Example 2, since the thickness of the single sheet in the width direction is larger than the thickness of the single sheet in the longitudinal direction, the amount of warpage in Example 2 is considered to be smaller than that in Example 1. In Examples 1 and 2, compared to Example 3, the thickness of the MDF could be adjusted easily and accurately in the polishing step (6) described above.

  Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments, and various designs can be made without departing from the spirit of the present invention described in the claims. It can be changed.

  For example, in the present embodiment, the wooden floor material for warm water type floor heating is illustrated, but the present invention is not limited to this, and may be, for example, a wooden floor material for electric floor heating. .

  1A, 1B: Wooden flooring, 2: Hot water pipe unit, 10: Wooden base material, 11a, 11c, 11d: Longitudinal veneer, 11b, 11d: Width veneer, 13: Pipe receiving groove, 13a: Housing groove, 15a: male solid part, 15b: female real part, 21: base sheet, 22: hot water pipe, 23: upper cover, 30: wood fiber board, 30A: wood buffer board, 31: central wood fiber piece 32: End wood fiber piece, L: groove longitudinal direction, W: groove width direction

Claims (6)

A wooden base material in which a real part is formed at the periphery and a plurality of pipe-receiving grooves for receiving hot water pipes are formed on the back surface, and a wooden fiber board attached to the surface of the wooden base material. At least a part of the pipe housing groove in the pipe housing groove is a wood floor material for floor heating formed along the real part in the vicinity of the real part,
The wood-based flooring for floor heating, wherein the wood fiber board is divided at the center of the groove width of the housing groove and at a position along the groove longitudinal direction of the housing groove. The wood-based substrate is a plywood laminated such that a width direction single plate in the fiber direction along the groove width direction and a length direction single plate in the fiber direction along the groove length direction become a plurality of layers. ,
The thickness of the width direction veneer from the bottom of the housing groove to the surface of the woody base material is thicker than the thickness of the longitudinal veneer from the bottom of the housing groove to the surface of the woody base material The wooden flooring for floor heating according to claim 1, wherein the floor heating material is a floor heating material. A wooden base material in which a plurality of pipe-accommodating grooves for storing hot water pipes are formed on the back surface, and a wooden buffer plate attached to the surface of the wooden base material, with a real part formed on the periphery, A part of the pipe housing groove is a wood floor material for floor heating formed along the real part in the vicinity of the real part,
The wood buffer plate includes a wood fiber board disposed at the center of the surface of the wood base material, and a wood unit having a specific gravity higher than that of the wood base material disposed adjacent to the wood fiber board. A board,
The wood veneer is disposed along the longitudinal direction of the accommodation groove and from the periphery to the position covering the accommodation groove in the groove width direction.
The wood floor material for floor heating, wherein the fiber direction of the wood veneer intersects the longitudinal direction of the housing groove. The wood-based substrate is a plywood laminated such that a width direction single plate in the fiber direction along the groove width direction and a length direction single plate in the fiber direction along the groove length direction become a plurality of layers. ,
The thickness of the width direction veneer from the bottom of the housing groove to the surface of the wood base and the thickness of the wood veneer are the thickness from the bottom of the housing groove to the surface of the wood base. The wood-based flooring material for floor heating according to claim 3, wherein the flooring material is thicker than the thickness of the longitudinal single plate.   The said wood-type base material is a rectangular-shaped base material which consists of a long side and a short side, and the said accommodating groove part is formed along the short side direction. Wooden flooring for floor heating described in 1.   A floor heating unit comprising at least the wooden flooring for floor heating according to any one of claims 1 to 5 and a hot water pipe accommodated in a pipe housing groove of the wooden flooring for floor heating.

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