JPH09150406A - Wooden flooring material and manufacture of wooden plate for flooring material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a wooden plate, which has a stable sound-insulating properties and is hard to develop disagreeable stamping sound due to the distruction of the upside portions of grooves of a wooden plate during walking, the recessive warping of the wooden plate and the representation of the beads due to the bending of the upside portions of the grooves in accompany with the recessive warping. SOLUTION: At the manufacturing of a wooden plate 2 for flooring material, which is composed of an upper plate 2A and a lower plate 2B bonded to each other and has plurality of grooves 4 opened to the rear face of the wooden plate, after a plurality of upper groove 4a are produced by grooving in the upper part of the lower plate 2B, the upper plate 2A and the lower plate 2B are bonded to each other. Next, by grooving the near underside portions of the upper grooves 4a in the lower plate 2B, lowering grooves 4b continuous with the upper grooves 4a are formed so as to form a plurality of grooves 4 having the same depth as the thickness of the lower plate 2B in the wooden plate 2. After that, a wooden flooring material 1 is composed of the wooden plate 2 and a cushioning member 6 bonded beneath the wooden plate 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wooden floor material, particularly to a wooden floor material having a sound insulation property and a method for manufacturing a wooden board used for the wooden floor material.

In this specification, "sound insulation" means floor impact sound insulation performance.

[0003]

2. Description of the Related Art FIG. 1 shows a wooden floor material having sound insulation properties.
As shown in 0, a wooden board (22) having a plurality of grooves (24) opened on the back surface, and a vibration damping sheet material, a sound insulation sheet material, a cushioning sheet material, etc. arranged under the wooden board (22). A material including a soundproof member (6) is widely known. In addition, the surface of the wooden board (22) is usually covered with a decorative layer such as by sticking or painting a wooden veneer.
(3) is formed.

Here, the wood board (22) of the wood flooring (21) is obtained by forming a plurality of grooves (24) opened on the back surface by subjecting a lower part of a single plate such as plywood to a groove cutting process. It is manufactured, and the groove (24) is deeply formed in order to impart flexibility to the wooden board (22) so that the wooden board (22) is easily adapted to the floor base and to improve sound insulation. Not a few. For example,
As disclosed in Japanese Unexamined Patent Publication No. 6-336814, when the wood board is made of 5-ply plywood, a groove having a depth that reaches the second-layer veneer from the top is usually formed.

Further, as shown in FIG. 11, the wood board (32) is composed of an upper board (32A) and a lower board (32B), and a groove (34) having an opening on the back surface is formed in the lower board (32B). , Upper plate (32A) and lower plate (32B)
Soundproof member such as elastic sheet material or cushioning sheet material between
A wooden floor material (31) in which (33) is interposed is also conventionally known. This wood flooring (31) consists of a soundproof member (33) and a lower plate (32
The groove (34) of B) and the soundproofing member (6) have a triple soundproofing function, and thus have excellent sound insulation.

[0006] Then, the wood board (32) of this wood flooring (31)
After joining the upper plate (32A) and the lower plate (32B) to each other with the soundproof member (33) interposed, the lower part of the lower plate (32B) was grooved and opened on the back surface. It is manufactured by forming a plurality of grooves (34).

[0007]

However, among the above-mentioned conventional wooden floor materials, the wooden floor material (21) shown in FIG. 10 has the following three problems. That is, FIG.
In the case of the wooden floor material (21) shown in 0, the groove (2
Since the upper part of 4) was considerably thinner than the part without the groove (24), the bending strength of that part was not sufficient. Therefore, when a person walks on the constructed flooring (21) and a local load is applied, the upper part of the groove (24) of the wooden board (22) is damaged, and an unpleasant sound (below) , "Treading").

Moreover, in the case of the above-mentioned wooden floor material (21), a wooden board
It was not uncommon for (22) to have a valley warp. The cause of such valley warp is that the water content distribution of the wood board (22) varies, the balance of the wood board (22) is impaired due to the formation of multiple deep grooves (24), It is conceivable that the decorative layer (3) formed on the surface of the board (22) impairs the balance between the top and bottom of the wooden board (22). Then, when the warp occurs in the wooden board (22) as described above, it is difficult to join the wooden board (22) and the soundproofing member (6) or to perform the adhesive construction of the wooden floor material (21) to the floor base. There was a problem. Also,
The warped wood floor material (21) is not only difficult to construct, but also has a problem that a part of it is peeled off from the floor base after the construction and floats.

The wood board (22) immediately after the formation of a plurality of deep grooves (24) momentarily shows a tendency to warp, but the deep grooves (24)
Since the rigidity is weakened by (24), it may become flat when placed on a flat surface due to its own weight, and the upper part of the groove (24) with insufficient bending strength is the length of the groove (24). Sometimes it was bent along the direction. Also, when joining the warped wood board (22) to the soundproofing member (6), and further when bonding the warped wood floor material (21) to the floor base, the wood board ( The upper part of the groove (24) of 22) may be bent along the length direction of the groove (24). In these cases, a bent strip appeared on the surface of the wooden floor material (21), which was not aesthetically pleasing.

On the other hand, in the case of the wooden floor material (31) shown in FIG.
Regarding the above-mentioned problems of valley warping and the problem of the appearance of the ridges of the bent portion, a soundproof member should be placed between the upper plate (32A) and the lower plate (32B).
Something has been resolved by the inclusion of (33). However, the depth of the groove (34) is slightly shallower than the thickness of the lower plate (32B), and the upper and lower plates (32B) are both highly elastic.
Since it is sandwiched between two soundproof members (33) (6), when a person walks on the constructed wooden floor material (31), a lower plate with less bending strength.
There was a problem that the upper part of the groove (34) of (32B) was damaged, and squealing was generated as in the case of the wooden floor material (21).

Further, in the wood flooring materials (21, 31) shown in FIGS. 10 and 11, grooves (2) are formed in these wood boards (22, 32).
4,34) was formed by using a circular saw to form a groove, but the difference in diameter of the circular saw due to the degree of polishing,
Vibration of circular saw during processing, vibration of wood board (22, 32) during transportation,
Due to variations in the thickness of the wooden boards (22, 32), etc., the grooves (24,
There was a problem in that the sound insulation was not stable as a result of variations in the depth of 34). Further, if the grooves (24, 34) are shallow, the flexibility of the wooden boards (22, 32) is reduced, and the wooden boards (22, 32) are less compatible with the floor substrate. Furthermore, in the wood flooring (31) shown in FIG. 11, when the groove (34) reaches the upper plate (32A), squealing, valley warp of the wood board, and the upper part of the groove due to the valley warp The strips are exposed due to bending.

The present invention has been made in view of the above-mentioned problems, and prevents unpleasant squealing due to the destruction of the upper portion of the groove of the wood board, the warp of the wood board, and the warp of the wood board during walking. It is an object of the present invention to provide a wood flooring material which has stable sound insulation while preventing the strips from being exposed due to the bending of the upper part of the groove.

[0013]

In order to achieve the above object, a method for manufacturing a wooden board for flooring according to claim 1 of the present invention comprises an upper plate and a lower plate joined to each other. In producing a wood board having a plurality of grooves opened on the back surface, the upper plate of the lower plate is subjected to grooving to form a plurality of upper grooves, and then the upper plate and the lower plate are joined, and then By forming a lower groove that is continuous with the upper groove by subjecting the lower plate to substantially lower part of the upper groove, a groove cutting process is performed.
It is characterized in that a plurality of grooves having the same depth as the thickness of the lower plate are formed in the wood board.

According to a second aspect of the present invention, there is provided a method for manufacturing a wooden board for a flooring material, which comprises an upper board and a lower board joined to each other through a soundproof member and has a plurality of grooves opened on the back surface. In manufacturing the plate, the upper part of the lower plate is subjected to grooving to form a plurality of upper grooves, and then the upper plate and the lower plate are joined via a soundproof member, and then the upper part of the lower plate is joined. It is characterized in that a plurality of grooves having the same depth as the thickness of the lower plate are formed on the wood board by forming a lower groove that is continuous with the upper groove by performing a grooving process on a substantially lower portion of the groove.

According to each of the above methods, it is possible to surely form a plurality of grooves having the same depth as the thickness of the lower plate on the wooden board for flooring material.

The wood floor material according to claim 3 of the present invention comprises a wood board manufactured by the method according to claim 1 or 2, and a soundproof member arranged below the wood board. .

According to the above-mentioned wooden floor material, since the plurality of grooves having the same depth as the thickness of the lower plate are formed in the wooden board, the groove depth of the wooden board does not vary. Sound insulation is stable. In addition, in the upper part of each groove in the wood board, there is an upper board different from the lower board in which the groove is formed,
The bending strength of the same part is improved as compared with the case where a deep groove is formed in a single wood plate. Therefore, since the bending strength as a wooden board can depend on the upper board, a plurality of grooves having the same depth as the thickness of the lower board can be formed in the wooden board as described above, and as a result, the constructed wooden floor Since there is no place where a person may walk on the material and damage it, stagnation is reliably prevented. In addition, since the lower plate of the wooden board is divided by the groove, the flexibility of the wooden board is improved, and the wooden board is well adapted to the floor base. Furthermore, there is no concern that grooves will be formed in the upper plate, and therefore, the upper plate does not lose its balance as a plate, so warping is less likely to occur, which in turn causes warping of the wooden board and even the wooden flooring. In addition, it is less likely to occur, and it is difficult for the strip to be exposed due to the bending of the upper part of the groove due to the warp.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of the present invention will be described with reference to FIGS.

FIG. 2 shows a first embodiment of a wood flooring material according to the present invention, in which the wood flooring material (1) comprises an upper plate (2A) and a lower plate (2B) joined together. And a cushioning member (6) joined below the wooden board (2) and having a plurality of lateral grooves (4) opened on the back surface. A sheet material (7) is interposed between the upper plate (2A) and the lower plate (2B). However, this sheet material (7) is not always necessary.
The lower plate (2B) of the wooden board (2) is formed with a plurality of upper vertical grooves (5) which are open to the upper surface and extend in the length direction thereof.
The depth of the lateral groove (4) matches the thickness of the lower plate (2B), and a step is provided in the middle of the groove so that the groove width above the step is narrower than the groove width below the step. ing. A decorative layer (3) is formed on the surface of the upper plate (2A).

Examples of the material of the upper plate (2A) include plywood, medium-quality fiberboard (MDF), particle board, hard board, etc. In consideration of the ease of makeup and joining processing on the surface and bending strength. Then, plywood or medium fiberboard is preferably used. In the case of plywood, 3 ply or more is preferable. The plywood may be of an even-numbered ply in addition to the usual ply of odd-numbered plies, and in that case, even if the fiber directions of the veneers of the respective layers are alternately orthogonal to each other, some of the plies of adjacent layers may be The fiber directions of the single plates may be parallel to each other. In addition, the upper plate (2A) is composed of upper and lower two layers, and, for example, a high-density soft sheet or a low-foam sheet having a foaming ratio of 1.5 to 6 times is interposed between both layers. It may be one. The thickness of the upper plate (2A) is preferably 1.5
~ 7.5 mm range, more preferably 2.4 ~ 5.5 mm
Is set in the range. From the standpoint of sound insulation, the thinner the upper plate (2A), the better, but if the thickness is less than 1.5 mm, the bending strength will be insufficient and the upper part of the groove (4,5) will be used when a person walks. On the other hand, if the thickness exceeds 7.5 mm, the rigidity of the flooring material becomes too high, and the sound insulation may decrease.

The lower plate (2B) is appropriately selected from the materials for the upper plate (2A), but it is easy to process grooves and joints and has a good work finish, and is superior to the case of particle board or hard board. Plywood or a medium-quality fiberboard that provides a strong joint is preferably used. The plywood may be a softwood plywood or a lauan plywood, which has many defects such as cracks and voids and cannot be usually used as a makeup base plywood. In addition, on the periphery of many defective particle boards and softwood plywood,
It is also possible to use a plywood or a medium quality fibreboard, which is easy to process, has a good finished joint, and has relatively high strength. The thickness of the lower plate (2B) is the same as the thickness of the upper plate (2A) and the wooden floor material (1).
2.5-1 as determined in relation to overall thickness
A range of 5 mm is suitable. Probably because the groove (4) with the same depth as the thickness is formed in the lower plate (2B), if the thickness of the lower plate (2B) is in the above range, sound insulation will be provided as long as other conditions are matched. It turned out to be almost unchanged. However, from the viewpoint of processing for joining, it is preferable to set the thickness of the lower plate (2B) so that the total thickness of the upper plate (2A) and the lower plate (2B) is 5 mm or more. . When the upper plate (2A) and the lower plate (2B) are both plywood, the fiber direction of the front plate of the upper plate (2A) and the fiber direction of the front plate of the lower plate (2B) are parallel to each other. Or they may intersect. Further, as described above, when the fiber directions of the front veneer of the upper plate (2A) and the lower plate (2B) intersect with each other, the fiber direction of the front veneer of the upper plate (2A) is a wood flooring ( When it is arranged to be substantially orthogonal to the lengthwise direction of 1), the flexibility of the wooden flooring material (1) is further improved, and thereby the wooden flooring material becomes even more comfortable.

The decorative layer (3) is made of wood veneer, sawn board, cork, pattern-printed paper, synthetic resin sheet, etc. as the top plate (2A).
It is formed by sticking or painting on the surface of. The upper plate (2A) is made of plywood, and the decorative layer
If (3) is made of wood veneer, a thin sheet of non-woven fabric, paper, cloth, etc. may be interposed between them to prevent the wood veneer from getting scratched. You may make it adhere | attach so that a fiber direction may mutually orthogonally cross.

In the wood flooring (1) of FIG. 2, the wood board (2) has a lateral groove (4) which is open to the back surface and whose depth is equal to the thickness of the lower board (2B). But
In addition to the horizontal groove (4) or instead of the horizontal groove (4), a vertical groove which is opened on the back surface and whose depth is equal to the thickness of the lower plate (2B) is formed on the wood plate (2). May be. The groove width is
It is preferably 0.7 mm or more in the narrowest portion. If the groove width is less than 0.7 mm, it is necessary to increase the number of grooves in order to maintain sound insulation, and it is necessary to thin the cutting edge of the cutting tool, which causes the cutting tool during rotary cutting. This is because the lateral runout of the blade becomes large and it becomes difficult to control the grooved state and the blade. The space between adjacent grooves is preferably 5 to 50 mm, more preferably 8 to 3 mm.
It is made 0 mm. From the standpoint of sound insulation and ease of fitting to the floor base, the narrower the gap between the grooves, the better, but if it is less than 5 mm, the strength of the wood board (2) will be insufficient, while 50 mm
If it exceeds, the effect of sound insulation cannot be said to be sufficient, and sound insulation class L
This is because it becomes difficult to achieve the level of -45 or L-50. The intervals between the grooves do not necessarily have to be equal,
The interval may be changed appropriately. If the surface of the decorative layer (3) is grooved, in order to prevent damage to the upper plate (2A), the groove of the decorative layer (3) and the groove (4, 4, It is preferable that 5) does not match. Groove occupying the lower plate (2B) surface
The area ratio of (4,5) is preferably 5 to 30%, more preferably 9 to 22%. If it is less than 5%, the effect of sound insulation due to the presence of grooves will not be sufficiently exerted, while if it exceeds 30%, the strength of the wood board (2) will be insufficient.

It is preferable that the sheet material (7) has a good balance with the decorative layer (3) on the surface of the wooden floor material (1) and can resist the warp movement of the upper plate (2A). For example, paper, non-woven fabric, synthetic resin-impregnated paper, and synthetic resin layers made of thermoplastic resins such as polyethylene, polypropylene, polyvinyl chloride, vinylidene chloride, ethylene vinyl acetate copolymer, etc. may have the same or different types on both sides. A three-layer sheet formed by arranging paper, non-woven fabric, etc., a wood veneer, etc. can be mentioned. The thickness of the sheet material (7) is preferably in the range of 35 μm to 0.4 mm. If it is less than 35 μm, it is not balanced with the decorative layer (3), while if it exceeds 0.4 mm, there is no great difference in the effect of preventing valley warp, which is not preferable from the viewpoint of manufacturing cost, and there is a risk of delamination. Because. When the decorative layer (3) is made of wood veneer, the tensile strength of the sheet material (7) (JIS
・ According to P8113) is preferably 4 per 15 mm width.
It is required to be not less than kgf, more preferably not less than 5 kgf. However, when a wood veneer is used for the sheet material (7), since it has the same properties as the decorative layer (3), it is not always necessary to satisfy the above tensile strength.

Although not shown, the same type or different types of paper, non-woven fabric, etc. are arranged on the back surface of the lower plate (2B) of the wooden board (2) on both sides of a moisture-proof resin layer such as polyethylene. You may make it stick the moisture-proof 3 layer sheet | seat formed in this way. Due to the presence of such a sheet material, it is possible to prevent moisture absorption from the back surface of the lower plate (2B) during the manufacturing process, and thus to prevent the warp of the wood plate (2) due to moisture absorption.

As the soundproof member (6), known materials having a soundproof function such as a vibration damping sheet material, a sound insulating sheet material, and a cushioning sheet material can be used alone or in combination of a plurality of materials. The following may be mentioned as examples. Examples of the vibration damping sheet material include rubber such as synthetic rubber and natural rubber, synthetic resin such as polyvinyl chloride and polyurethane, a mixture of synthetic resin and synthetic rubber,
Alternatively, a material obtained by mixing a high specific gravity substance such as a metal powder such as lead powder or iron powder or a granular material such as barium sulfate into these materials can be used. Examples of the sound-insulating sheet material include a sheet-like material obtained by mixing iron powder, steel slag, or the like into asphalt or a mixture of asphalt and synthetic resin or synthetic rubber. Examples of the cushioning sheet material include foam and fiber materials. Examples of the foam include foams made of synthetic resins such as polyethylene, polypropylene, polyvinyl chloride, and polyurethane, natural rubber, synthetic rubber, and a combination of several kinds of these, and the expansion ratio is It is usually 10 to 50 times. Also, a combination of several kinds of foams having different materials, foaming ratios, and foaming forms (closed cells, open cells) may be used. Examples of the fibrous substance include insulation boards, glass fibers, non-woven fabrics such as polyester, nylon (trademark) and polypropylene, felts, carpets, etc., but these materials have a water repellent such as asphalt pitch and elasticity even after curing. What is impregnated with the synthetic resin such as the urethane resin may be used.
Regarding glass fiber and non-woven fabric, there is a problem that the adhesive completely penetrates when it is bonded to the wood board (2) and the buffering property is impaired. Therefore, when used alone, the thickness is 4 mm or more, When used in combination with other materials, the thickness is preferably 1 mm or more. A high specific gravity (1.0 or more) soft sheet made of a material such as vinyl chloride-based, synthetic rubber-based, or asphalt-based mixed with metal powder such as iron or lead, or inorganic powder such as calcium carbonate or barium sulfate. Alternatively, a low foam sheet or a non-foam sheet having an expansion ratio of 5 times or less may be used in combination with the above materials. In addition, in order to prevent deterioration of the cushioning property of the cushioning sheet material due to the penetration of the adhesive when adhering to the floor base, wood veneer, nonwoven fabric, polyolefin resin sheet such as polyethylene and polypropylene, vinyl chloride resin sheet, synthetic Alternatively, a natural rubber sheet or the like may be attached to the lower surface of the cushioning sheet material, or may be interposed between the cushioning sheet material and the floor substrate, or has flexibility such as polyethylene, polypropylene, or vinyl chloride resin. Thickness 10
A resin sheet of ˜100 μm may be interposed below half the thickness of the cushioning sheet material. Soundproofing material
The shape of (6) may be a flat plate shape or a shape having a large number of irregularities formed on at least one of the upper surface and the lower surface. The thickness of the soundproof member (6) is 3 to
10 mm is common.

Next, an example of a method for manufacturing the above wood floor material (1) will be described with reference to FIG.

First, a plurality of upper lateral grooves (4a) and upper longitudinal grooves (5) are subjected to grooving using a circular saw at a plurality of positions in the width direction and the length direction of the upper portion of the lower plate (2B). Are formed (see FIG. 1 (a)).

Next, after bonding the sheet material (7) to the back surface of the upper plate (2A), the front surface of the lower plate (2B) is bonded to the back surface of this sheet material (7), and the wood board (2) Are formed (see FIG. 1 (b)).
Of course, the bonding may be performed in the reverse order. Here, the adhesion may be either cold pressure or hot pressure, or high frequency, and can be arbitrarily selected.

Then, the decorative layer (3) is formed on the surface of the wooden board (2), and the peripheral portion of the wooden board (2) is subjected to a joining process, and further, if necessary, colored and painted. (Fig. 1
(c)). The formation of the decorative layer (3) and the joining process may be performed before the step of adhering the wood board (2) and the soundproofing member (6) described later.

Next, the lower side portion of the upper lateral groove (4a) of the lower plate (2B) is subjected to grooving using a circular saw, and the upper lateral groove (4a).
Lower lateral groove (4b) that is wider than the upper lateral groove (4a) and is wider than the upper lateral groove (4a).
To form a plurality of lateral grooves (4) having the same depth as the thickness of the lower plate (2B) on the wood plate (2) (Fig. 1 (c)).
reference). Incidentally, the lower lateral groove (4b) does not necessarily have to be formed in the lower part of all the upper lateral grooves (4a) in the lower plate (2B), and is formed only in the lower part of a part of the upper lateral groove (4a). In other words, that is, some upper lateral grooves (4a) may be left. In addition to the lower part of the upper lateral groove (4a), the lower lateral groove (4
b) may be formed. In this case, the upper lateral groove (4
No lower lateral grooves (4b) should be formed in the lower part of a). If such a lower lateral groove (4b) is formed, there is a factor of stomping due to the remaining part between the groove (4b) and the upper lateral groove (4a) being destroyed by the load during walking. It is possible that The lower plate
The lower part of the upper vertical groove (5) of (2B) is also subjected to the same grooving processing as above to form a lower vertical groove that is continuous with the upper vertical groove (5). A plurality of vertical grooves having the same depth as the thickness of the wood board (2) may be formed in the wood board (2).

3 to 5 show modifications of the lateral groove (4). That is, the lateral groove (4) of the wood board (2) is, as shown in FIGS. 3 (a) and 3 (b), the width center of the lower board (2B) approximately at the lower side of the upper lateral groove (4a). Is the upper lateral groove (4a) of the lower plate (2B)
It may be formed by grooving so as to form a lower lateral groove (5b) slightly displaced from the center of the width of the groove, or the lateral groove (4) shown in FIG. 1 and FIGS. 3 (a) and 3 (b). Lateral groove shown in
(4) and may be mixed. As shown in FIGS. 4 (a) and 4 (b), the width of the upper lateral groove (4a) is made wider than that shown in FIG. 3, and the width of the upper lateral groove (4a) below the lower plate (2B) is reduced. Groove processing is performed on the side part so as to form a lower lateral groove (4b) whose width center is narrower than the upper lateral groove (4a) and whose width center coincides with or slightly deviates from the width center of the upper lateral groove (4a). You may form by this. Furthermore, FIG.
As shown in (a) and (b), the width of the upper lateral groove (4a) is the same as that of the upper lateral groove (4a) and the width center of the upper lateral groove (4a) is almost in the lower part of the upper lateral groove (4a) in the lower plate (2B). It may be formed by performing a grooving process so as to form the lower lateral groove (4b) which coincides with the width center or is slightly displaced. In short, the lower lateral plate (2B) is formed by the upper lateral groove (4a) and the lower lateral groove (4b) continuing.
The width and depth of the upper lateral groove (4a) and the lower lateral groove (4b) are not particularly limited as long as the groove (4) having the same depth as the thickness of the above is formed in the wood board (2). The width centers of the grooves (4a) (4b) may be aligned with each other or may be displaced from each other, and further, the shapes of the grooves (4) formed by the upper and lower grooves (4a) (4b) are all the same. They may exist or different ones may be mixed.

Finally, the back surface of the wood board (2) and the front surface of the soundproof member (6) are bonded (see FIG. 1 (d)). Thus, the wooden floor material (1) is obtained.

Construction of the wooden floor material (1) is carried out, for example, by applying a construction adhesive such as an epoxy resin to the floor base or the back surface of the wooden floor material (1), and then applying the wooden floor material (1) under the floor. It is done by laying it down on the ground. Incidentally, at this time, the joints between the adjacent wooden floor materials (1) may be partially or wholly adhered with a construction adhesive.

Further, according to the wood flooring material (1), the plurality of lateral grooves (4) formed in the wood board (2) may cause variations in these depths based on the groove cutting accuracy. Since there is no sound insulation, there is no place where a person may walk on the constructed wooden floor material (1) and there is no risk of damage, and therefore stagnation is reliably prevented. In addition, in the upper part of each groove (4,5) in the wood board (2), there is an upper board (2A) different from the lower board (2A) in which the grooves (4,5) are formed. The bending strength of the same part is improved as compared with the case where a deep groove is formed in a single wood plate. Moreover, since the lower plate (2B) of the wooden board (2) is divided by the lateral groove (4),
The flexibility of the wooden board (2) is improved, and the wooden board (2) is well adapted to the floor base. In addition, mistakenly insert the groove (4,
5) There is no concern that the upper plate (2A) is formed
Since the balance as a board is not impaired, warpage is less likely to occur, which in turn reduces the occurrence of warpage on the wood board (2) and further on the wood flooring (1), and also the groove (4, The effect that it is difficult for the stripes to be exposed due to the bending of the upper part of 5).

In the above wooden floor material (1), the wooden board (2) and the soundproofing member (6) are bonded to each other, and then these are bonded to the floor base. The wood board (2) and the soundproofing member (6) may be adhered to each other after first adhering to the floor base. In addition, wood flooring (1)
It is also possible to construct with only (2) and to bond the wood board (2) directly to the floor base.

FIGS. 6 and 7 show a second embodiment of the present invention. The illustrated wooden floor material (11) is the wooden floor material (shown in FIGS. 1 to 5 except for the following points). It has the same structure as 1) and exhibits substantially the same operational effects as the wooden floor material (1). That is, as shown in FIG. 7, the upper plate (2A) of the wooden floor material (11)
A soundproof member (8) is interposed between the lower plate (2B) and the lower plate (2B). As the soundproof member (8), the same material as the soundproof member (6) arranged under the wooden board (2) can be exemplified, and like the soundproof member (6), a material having a soundproof function can be used. They can be used alone or in combination of two or more.
Further, although having the same type of functions such as vibration damping, sound insulation, and cushioning, several kinds of sheet materials different in at least one of material, shape, specific gravity and the like may be used in combination. Further, it may be the same as or different from the soundproof member (6). The thickness of the soundproof member (8) is usually about 0.
4 to 3.0 mm, preferably about 0.5 to
It is 2.5 mm.

When the soundproofing member (8) is made of foam only, it is preferable to use one having an expansion ratio of 20 times or less. This is because if the foaming ratio exceeds 20 times, the feeling of ups and downs during walking becomes too large. Also, as long as the thickness of the soundproof member (8) is within the above range, if the expansion ratio is 20 times or less, there is no great difference in sound insulation performance. However, when the soundproof member (8) is formed by combining the foam and the vibration damping sheet material or the sound insulation sheet material, the thickness occupied by the foam is smaller than that of the foam alone.
The expansion ratio of the foam may exceed 20 times.

In addition, in this wooden floorboard (11), the upper board
The above-mentioned sheet material (7) may be interposed between (2A) and the soundproof member (8) (see FIG. 8). Since the sheet material (7) and the decorative layer (3) on the surface of the wooden floorboard (11) are balanced, the wooden board before being joined with the soundproofing member (6)
(2) Furthermore, the wooden flooring material (11) formed by joining the wooden board 829 and the soundproofing member (6) is warped, and the warp is particularly unlikely to occur.

This wood floor material (11) consists of an upper plate (2A) and a lower plate (2B).
Due to the soundproof member (8) interposed between the wooden floor material and the wooden floor material (1), the wooden floor material (1) is superior in sound insulation.

FIG. 6 shows an example of a method for producing the wooden flooring material (11), which is the same as the method for producing the wooden flooring material (1) except for the following points, and is almost the same as the method. Produce the effect of.
That is, as shown in FIG. 6 (b), a plurality of upper lateral grooves (4a) are previously formed.
And the lower plate (2B) with the upper vertical groove (5) formed (Fig. 6 (a)
After the soundproof member (8) is bonded to the surface of the soundproof member (8) by adhesion or the like, the upper plate (2A) is bonded to the surface of the soundproof member (8) by bonding or the like to form the wood board (2). Of course, the joining may be performed in the reverse order of the above. Here, the adhesion may be either cold pressure or hot pressure, and
A high frequency wave may be used and can be arbitrarily selected.

[0042]

EXAMPLES Next, examples of the present invention will be described together with comparative examples (FIG. 2, FIG. 7, FIG. 8, FIG. 9, FIG. 10 and FIG. 1).
1).

Example 1 The wood flooring material (1) of this example comprises an upper plate (2A) made of 3-ply plywood 2.5 mm thick and a softwood 3 made of 8.5 mm thick.
The lower plate (2B) made of ply plywood and the heat-resistant polyethylene sheet on both sides of which the paper is heat-sealed and the tensile strength (according to JIS P8113) is 15 mm in width.
Sheet material consisting of a three-layer sheet having a weight of 5.5 kgf
A wood board (2) obtained by adhesively bonding to each other with (7) interposed, an upper synthetic resin foam having a thickness of 2.0 mm formed by continuous foaming at a foaming ratio of 45 times, and a foaming ratio of 30.
It is composed of a lower synthetic resin foam with a thickness of 2.5 mm formed by independent foaming and a soundproof member (6) adhered to the back surface of the wooden board (2), and its width is 145 mm,
The length is 909 mm (see FIG. 2). The surface of the wooden board (2) has a thickness of 0.2 with urethane resin coating on the surface.
A 5 mm oak veneer is adhered to form a decorative layer (3). The wood board (2) extends in the width direction of the wood board (2) and has an upper width of 1.5 mm and a lower width of 3.0 mm.
And, the stepped lateral grooves (4) whose depth corresponds to the thickness of the lower plate (2B) are formed at intervals of about 12 mm in the longitudinal direction of the wooden plate (2). Also, on the lower plate (2B) of the wooden board (2),
An upper vertical groove (5) with a width of 1.5 mm and a depth of 3.8 mm that extends in the lengthwise direction has an opening of approximately 1 in the widthwise direction of the wood board (2).
It is formed at intervals of 6 mm. The periphery of the wooden board (2) is subjected to actual processing (not shown). Then, the wooden floor material (1) is applied to the floor base by the bonding method. Here, the lateral groove (4) of the wood board (2) has a width of 1.5 mm and a depth of 4.5 m above the lower board (2B) before being joined to the upper board (2A).
After forming the upper lateral groove (4a) of m with a circular saw, the upper plate (2A) and the lower plate (2B) are joined, and then the lower side of the upper lateral groove (4a) in the lower plate (2B). Width 3.0 mm, depth 5.
It is formed by performing a grooving process with a circular saw so as to form a lower lateral groove (4b) whose width center is 0 mm and whose width center coincides with the width center of the upper lateral groove (4a).

Example 2 In the wood floor material of this example, the sheet material (7) is not interposed between the upper plate (2A) and the lower plate (2B), and the lower plate (2B) is thick. 5.5 mm thick lauan 5-ply plywood, wood board
The depth of the upper lateral groove (4a) forming the lateral groove (4) of (2) is 2.9.
mm, the depth of the lower lateral groove (4b) is also 3.8 mm, and the depth of the upper vertical groove (5) of the lower plate (2) is 2.9 m.
m, width 3.0 mm, depth 3.8 mm in the lower part of the upper flute (5) in the lower plate (2B), and the width center thereof coincides with the width center of the upper flute (5). By performing a grooving process with a circular saw so as to form a lower vertical groove like that, a vertical groove opening on the back surface and having a depth equal to the thickness of the lower plate (2B) is formed on the wooden board. Except for the points, the same as Example 1 (not shown).

Example 3 The wood floor material (11) of this example is a natural rubber foam having a foaming ratio of 2.5 times and a thickness of 0.6 mm between the upper plate (2A) and the lower plate (2B). A sound insulating member (8) is interposed, and the sound insulating member (6) has an upper synthetic resin foam of 3.0 mm in thickness formed by continuous foaming with a foaming ratio of 30 times and a foaming ratio of 3
Example 2 is the same as Example 2 except that the lower synthetic resin foam has a thickness of 1.0 mm and is formed by independent expansion at 0 times (see FIG. 7).

Example 4 The wooden flooring material (11) of this example is the upper plate (2A) and the soundproofing member (8).
Sheet material (3) consisting of a heat-resistant polyethylene sheet with heat-sealed paper on both sides and a tensile strength (according to JIS P8113) of 5.5 kgf per 15 mm width (7) The third embodiment is the same as the third embodiment except that is included (see FIG. 8).

Comparative Example 1 The wood flooring material (41) of Comparative Example 1 was grooved with a circular saw on the lower plate (2B) after the transverse groove (4) of the wooden plate (2) was joined to the upper plate (2A). It is the same as Example 1 except that it is formed by processing and that the upper vertical groove (5) is not formed in the lower plate (2) (see FIG. 9). Here, the lateral groove (4) is formed by setting a circular saw so that the width thereof is 2.7 mm and the depth thereof is 8.0 mm. Regarding the depth of each lateral groove (4), Many of them were according to the set values, but 7.5 mm
Some of them have reached the upper plate (2A) with 8.8 mm, and dimensional errors occurred in the range of 1.3 mm.

Comparative Example 2 The wood flooring material of this comparative example is a circular floor plate (2B) after the horizontal grooves (4) and vertical grooves (not shown) of the wood plate (2) are joined to the upper plate (2A). The second embodiment is the same as the second embodiment (not shown) except that the grooves are formed by sawing. here,
The transverse grooves (4) have a width of 2.0 mm and a depth of 5.0 m.
It was formed by setting a circular saw so as to be m, and the depth of each lateral groove (4) was often the same as the set value, but it was 4.5 mm or 5.7 mm and the upper plate. (2A)
In some cases, the dimensional error occurred in the range of 1.2 mm. The flutes are formed by setting a circular saw so that the width of these flutes is 2.5 mm and the depth thereof is 5.0 mm. Regarding the depth of each flute,
Although many of them were according to the set values, some were 4.5 mm and some were as large as 5.7 mm up to the upper plate (2A), resulting in a dimensional error in the range of 1.2 mm.

Comparative Example 3 In the wood flooring material (21) of this comparative example, the wood board (22) had a thickness of 9.0.
mm lauan 5-ply plywood, horizontal grooves (24) and vertical grooves of the wood board (22) are formed by grooving from the back side of the wood board (22) with a circular saw. The same as Example 2 except for (see FIG. 10). Here, the lateral groove (24) has a width of 2.7 mm and a depth of 6.0 mm.
It was formed by setting a circular saw so that the depth of each lateral groove (24) was often the same as the set value, but there are also 5.5 mm and 6.5 mm. , 1.0 mm, resulting in dimensional error. The flutes are formed by setting a circular saw so that these widths are 2.7 mm and the depth is 6.0 mm, and the depth of each flute is as set. However, there were some types with 5.5 mm and some with 6.5 mm, which resulted in a dimensional error in the range of 1.0 mm.

Comparative Example 4 In the wood flooring material (31) of this comparative example, the upper plate (32) is provided with the horizontal groove (34) and the vertical groove (not shown) of the wooden board (32) through the soundproof member (33).
It is the same as Example 3 except that the lower plate (2B) after being joined with A) is formed by grooving with a circular saw (see FIG. 11). The dimensional error of the lateral groove (34) and the vertical groove was almost the same as in Comparative Example 2.

The following results were obtained by observing and measuring the sound insulation, the presence / absence of squeaking, the presence / absence of valley warpage, and the surface condition of each of the above-mentioned Examples and Comparative Examples.

First, regarding sound insulation, 36 pieces of each floor material are arranged and fixed on a concrete slab having a thickness of 150 mm,
When a light impact sound test was conducted at three locations in accordance with JIS A1418, sound insulation grades L-44 to L-45 were obtained for Examples 1 and 2, and sound insulation grades L-39 to L were made for Examples 3 and 4. A measurement result of -40 level was obtained. On the other hand, the sound insulation grades L-44 to L-48 levels were obtained for Comparative Examples 1 to 3, and the sound insulation grade L-40 to L-43 levels were obtained for Comparative Example 4. As is clear from the above measurement results, it can be seen that the variation in the example is smaller than that in the comparative example, and stable sound insulation is obtained.

When walking on each wooden floor material (1,11,21,31,41) after construction, only lateral grooves (4) were found in Comparative Examples 1 to 4.
A squealing noise was generated due to the destruction of the upper part of the.

Wooden board in a state before being bonded to the soundproof member (6)
Regarding (2, 24), the presence or absence of a valley warp in the length direction was observed. As for Examples 1 to 4, most of them did not have a valley warp, and a few showed a slight valley warp. However, in Comparative Examples 1 to 4, there were more valleys than in the Examples. Also wood board
Wood flooring (1,11,21,31,4) with soundproofing material (6) bonded to (2)
In the state of 1), the same tendency as above was observed, but there was no problem in construction.

Observation of the surface of each wooden floor material (1, 11, 21, 31, 41) after construction revealed that in Comparative Examples 1, 2 and 4, the upper plate (2A, 32A) was reached. A strip formed by bending the upper part of the lateral groove (4, 34), for Comparative Example 3, each lateral groove
Strips due to the bending of the upper part of (24) appeared on the surface, respectively, but in Examples 1 to 4, such strips were not seen.

[0056]

According to the method of manufacturing a wooden board for flooring of the present invention, a plurality of grooves having the same depth as the thickness of the lower board can be surely formed in the wooden board.

Further, according to the wood flooring material of the present invention, since the plurality of grooves having the same depth as the thickness of the lower plate are formed in the wood board, the depth of the grooves of the wood board varies. Sound insulation is stable. Also, since the upper part of each groove in the wood board is different from the lower board in which the groove is formed, compared to the case where a deep groove is formed in the single wood board, Bending strength is improved. Therefore, since the bending strength as a wooden board can depend on the upper board, a plurality of grooves having the same depth as the thickness of the lower board can be formed in the wooden board as described above, and as a result, the constructed wooden floor Since there is no place where a person may walk on the material and damage it, stagnation is reliably prevented. In addition, since the lower plate of the wooden board is divided by the groove, the flexibility of the wooden board is improved, and the wooden board is well adapted to the floor base. Furthermore, there is no concern that grooves will be formed in the upper plate, and therefore, the upper plate does not lose its balance as a plate, so warping is less likely to occur, which in turn causes warping of the wooden board and even the wooden flooring. In addition, it is less likely to occur, and it is difficult for the strip to be exposed due to the bending of the upper part of the groove due to the warp.

[Brief description of the drawings]

FIG. 1 is a manufacturing process diagram of a wooden flooring material showing a first embodiment of the present invention.

FIG. 2 is a partially enlarged vertical sectional view of a wooden flooring material showing the first embodiment of the present invention.

FIG. 3 is a partially enlarged vertical sectional view showing a modified example of the groove of the wooden board.

FIG. 4 is a partially enlarged vertical sectional view showing a modified example of the groove of the wooden board.

FIG. 5 is a partially enlarged vertical sectional view showing a modified example of the groove of the wooden board.

FIG. 6 is a manufacturing process diagram of a wooden flooring material showing a second embodiment of the present invention.

FIG. 7 is a partially enlarged vertical sectional view of a wood flooring material showing a second embodiment of the present invention.

FIG. 8 is a partially enlarged vertical cross-sectional view of a wooden flooring material showing a modified example of the second embodiment of the present invention.

FIG. 9 is a partially enlarged vertical sectional view showing a wood flooring material of Comparative Example 1.

FIG. 10 is a partially enlarged vertical sectional view showing a conventional wooden floor material.

FIG. 11 is a partially enlarged vertical sectional view showing another conventional wooden floor material.

[Explanation of symbols] (1,11)… Wooden flooring (2)… Wooden board for flooring (2A)… Upper panel (2B)… Lower panel (4)… Horizontal groove (4a)… Upper lateral groove (4b)… Lower lateral groove (6)… Soundproofing member (8)… Soundproofing member

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location E04F 15/18 602 8702-2E E04F 15/18 602E

Claims (3)

[Claims] 1. When manufacturing a wood board for flooring, which comprises an upper plate and a lower plate joined to each other and has a plurality of grooves opened on the back surface, a plurality of grooves are formed on the upper part of the lower plate by grooving. After forming the upper groove, joining the upper plate and the lower plate, and then performing a grooving process on almost the lower part of the upper groove in the lower plate to form a lower groove continuous with the upper groove. According to the method, a plurality of grooves having the same depth as the thickness of the lower plate are formed in the wooden board, and the method for manufacturing a wooden board for flooring is characterized. 2. When manufacturing a wood board for flooring, which comprises an upper plate and a lower plate joined to each other via a soundproof member and has a plurality of grooves opened on the back surface, a groove cutting process is performed on the upper part of the lower plate. To form a plurality of upper grooves,
By joining the upper plate and the lower plate via the soundproofing member, and then performing a grooving process on a substantially lower portion of the upper groove in the lower plate to form a lower groove continuous with the upper groove, A method for manufacturing a wooden board for flooring, characterized in that a plurality of grooves having the same depth as the thickness are formed in the wooden board. 3. A wood flooring material comprising a wood board manufactured by the method according to claim 1 and a soundproof member arranged below the wood board.