JP3538448B2 - Decorative flooring - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a decorative flooring material which can be suitably used, for example, for finishing a floor of a floor heating system.

[0002]

2. Description of the Related Art Conventionally, as a decorative flooring used for floor finishing, a decorative veneer on a plywood is most commonly used. It is customary to lay and construct by a so-called glue nail combination method in which an adhesive and a nail are used together and fixed to the floor substrate.

On the other hand, in recent years, houses and the like to which a floor heating system is applied have been increasing in order to improve the livability. Generally, as shown in FIG. 7A, the floor heating system includes a floor heating panel (2) in which a metal panel (2b) is provided on a heat radiating panel (2a), and a floor base (plywood) or the like. 1) is fixed on the floor heating panel (2) by screwing, and on this floor heating panel (2), a decorative floor material (3) composed of a plywood substrate (3a) and a decorative material (3b) is laid and constructed as described above. is there.

[0004] In such a floor heating system, since the upper layer of the floor heating panel (2) is constituted by the metal panel (2b), it is difficult to perform nailing work, and the radiating panel (2) of the floor heating panel (2) is difficult. Since a radiator such as a hot water pipe or a planar heating element is arranged in 2a), the nailing location of the floor heating panel (2) is restricted and nails cannot be driven as desired, and the decorative flooring (3) is not used. ) Is desirably applied on the floor heating panel (2) using only an adhesive.

[0005]

However, since the above-mentioned conventional decorative flooring (3) is poor in flexibility, unevenness is formed in the floor heating panel (2) or the flooring itself is not provided. If the warp is formed, there is a problem that it is difficult to fit the decorative floor material (3) onto the floor heating panel (2) without difficulty and the construction cannot be performed smoothly.

Further, the decorative flooring (3) contracts by releasing moisture when heated by the heating operation of the floor heating panel (2), and expands by absorbing moisture when cooled by stopping the heating operation. On the other hand, contrary to the floor material (3), the floor heating panel (2) expands when heated by the heating operation and contracts when cooled by stopping the heating operation. That is, since the floor heating panel (2) and the decorative flooring (3) behave in opposition to heating and cooling, for example, during a heating operation, the flooring contracts and the floor heating panel (2) expands. In addition, the gap between the adjacent floor materials (3) becomes large, and the aesthetic appearance is impaired. Furthermore, when the metal panel (2b) of the floor heating panel (2) is about to thermally expand, if the movement of the metal panel (2b) on the upper surface side is restricted by the contraction of the floor material (3), FIG. ), The metal panel (2b)
Ends of the heat-dissipating panel (2a) are peeled off and lifted up,
This causes the floor material (3) to be lifted up, thereby deteriorating the aesthetic appearance, increasing the amount of sinking when walking on the floor, making it impossible to obtain a comfortable walking feeling, and causing unpleasant tapping noise. Was.

On the other hand, when the heating operation is stopped, the floor material (3) expands and the floor heating panel (2) contracts, thereby causing deformation such as warpage and causing the floor material (3) to be moved to the floor heating panel (2). As described above, there arises a problem that the aesthetic appearance is impaired and a comfortable walking feeling cannot be obtained.

When the thermal expansion of the floor heating panel (2) is considerably large, as shown in FIG. 7 (c), the adjacent floor heating panels are strongly pressed against each other and the end of the floor heating panel (2) is pressed. The portion rises upward, and the floor material (3) peels off from the floor heating panel (2) and is lifted by being pushed by the portion, which causes a problem that the aesthetic appearance is impaired.

Further, the above-mentioned conventional decorative flooring (3) is not limited to the case where it is applied to a floor heating system, and also in a case where an electric carpet or the like is laid on the flooring surface or the like, the heating operation and the stop thereof are performed. When repeated, the decorative flooring (3) expands and contracts each time, and the stress at that time causes fine cracks or the like on the decorative veneer on the flooring surface, which impairs the aesthetic appearance or is harmful to the aesthetic appearance. There is also a problem that deformation such as warpage occurs.

The present invention solves the above-mentioned problems of the prior art, and can be easily fitted to a floor base such as a floor heating panel without causing harmful deformation such as warpage and can be bonded without nailing. It can be easily constructed using only the agent, and even when applied to floor heating systems, etc., no cracks are formed on the surface or large gaps are formed between adjacent floor materials, and swelling etc. occurs at the center and end of the floor material. Good aesthetics are obtained,
Moreover, it is an object of the present invention to provide a decorative flooring material that can provide a comfortable walking feeling without generating unpleasant treading sounds.

[0011]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above object, and an example of the decorative flooring of the present invention will be described with reference to the drawings. The floor material (F) is a surface base material (3
1) a surface material (30) made of a decorative material (32) provided on the upper surface thereof, provided on a base plate (10) via an intermediate layer (20) made of an elastic material; A plurality of grooves (11) are formed at least on the lower surface side of the base plate (10), and the surface material (30) is formed of a plurality of divided pieces (3).
3) a boundary portion between the divided pieces (33).
And the groove (11) does not overlap on a line in plan view.
It is configured as follows.

The flooring (F) has a gross portion (60) formed on two adjacent sides, and a female ridge portion that can be fitted to the gross portion (60) on the remaining two sides. (70) is formed.

When this floor material is applied to a floor heating panel (50) laid on a floor base (55), for example, as shown in FIG. ) Is applied to the floor heating panel (50) using an adhesive, and then 2
The floor material (F) after the first sheet is already a floor heating panel (50)
This is performed by fitting male and female to the tongue of the floor material (F) constructed in the above, and bonding and fixing the floor heating panel (50) in the same manner as described above.

At the time of this construction, since the floor material (F) has a groove (11) on the lower surface side of the base plate (10),
The flooring itself has sufficient flexibility, and the floor heating panel (5
0) can be smoothly applied, so that the construction using only the adhesive can be performed smoothly.

Further, the base plate (10) is formed with a groove (11) and an elastic intermediate layer (20) is provided thereon, so that the base plate constituent piece divided by the groove (11) can be placed on the floor. The metal panel (5) moves by following the thermal expansion of the metal panel (51) of the heating panel (50).
1) The movement of the metal panel (51) is not restricted, and the end of the metal panel (51) does not peel off from the heat radiating panel (52) as in the conventional example of FIG. Can be obtained.

Further, since a hard medium fiberboard excellent in surface smoothness and homogeneity is used as the surface base material (31), the surface can be finished well,
Even if the surface substrate (31) or the like expands and contracts due to repeated cold, it is possible to prevent the formation of cracks in the decorative material (32),
From this point, a good appearance can be obtained. Furthermore, sufficient scratch resistance is obtained, and the floor material surface is hardly damaged, and for example, formation of heel mark scratches can be prevented.

Further, the surface material (30) is composed of a plurality of divided pieces (3).
3), when the floor material (F) is heated when the floor material (F) is laid on the floor heating panel (50) as shown in FIG. Each of the divided pieces (33) contracts individually. For this reason, the change in the position of the end portion of the surface material due to the shrinkage becomes small, and it is possible to reliably prevent a large gap from being formed between the adjacent floor materials, and to obtain a good appearance. Furthermore, since each of the divided pieces (33) is individually deformed such as a warp, a large warp is not formed synergistically, and the bonding work can be performed more smoothly, and the occurrence of floating after the work is prevented. As a result, a good walking feeling and good appearance can be obtained.

Further, since an elastic material is used as the intermediate layer (20) interposed between the base plate (10) and the surface material (30), the floor material (F) is used as the floor heating panel (50). 4 (b), the ends of the floor heating panels (50) strongly press against each other due to thermal expansion and float upward, and are further pushed by the base plate (10) as shown in FIG.
Even if the surface of the floor material rises upward, the intermediate layer (20) elastically contracts, so that the smoothness of the floor material surface is secured,
Good aesthetics can be obtained.

Further, the difference in the contraction rate and expansion rate between the base plate (10) and the surface material (30) is absorbed by the elastic expansion and contraction of the intermediate layer (20). Deformation such as warp that is harmful to aesthetic appearance can be prevented.

Hereinafter, the structure of the flooring material of the present invention will be described in more detail.

As the base plate (10), a plywood, a reconstituted material, a laminated wood, a wood material such as a solid wood, or a combination of a plurality of these can be suitably used.

As the plywood for the base plate, Lauan plywood,
It can be preferably used one made of softwood plywood, etc., and is a tropical hardwood like Lauan, but the material is too hard or too soft to be rotary-cut, and has a rough surface, warpage, Tree species (Othe
Plywood consisting of (r Member) can also be used. In addition, in Lauan plywood, it is not limited to high-grade plywood, but is composed of plywood that is not used as a base material for flooring materials, that is, it has warpage, twist, wavy, or has poor surface quality, Things can also be used.

Examples of the reconstructed material for the base plate include a particle board (PB), a medium fiber board (MDF), a wafer board (WB), an oriented strand board (OSB), and a hard board (HB). can do. If the reconstructed material is used as the base plate (10) in this manner, the use of high-grade wood such as high-grade Rawan timber can be reduced correspondingly, and the depletion of natural wood resources can be dealt with.

The thickness of the base plate (10) is preferably set to 5 mm or more, and more preferably, the lower limit is set to 6 mm or more, and the upper limit is set to 12 mm or less. Furthermore, inside the base plate,
A reinforcing material may be arranged as necessary to increase the strength.

The base plate (10) may be joined in the length direction or the width direction. The joining method is not particularly limited. For example, a butt joint method, a scarf joint method, a phase joint method, a finger joint method, a real joint method, a phase joint actual peel joint method, and a joint part. A joining method such as a V-joint method having a V-shaped cross section can be suitably used.

The groove (1) formed on the lower surface side of the base plate (10)
Regarding 1), both the groove (11) parallel to the floor and the groove (11) orthogonal to the floor material, as shown in the drawing, are formed regardless of whether the groove is formed so as to be parallel or perpendicular to the length direction of the floor material. By forming it, it may be formed in a lattice shape, may be formed in an oblique direction with respect to the length direction of the floor material, or may be formed in an oblique lattice shape. Further, the groove (11) does not necessarily need to be formed in a linear shape, but may be formed in a wave shape, an arc shape, or a step shape. Further, as shown in FIG.
May be formed on the upper surface side of the base plate (10) together with the lower surface side of the base plate (10).

The shape of the groove (11) is not limited either. For example, as shown in FIG.
(U-shape) or U-shape.

The width of the groove (11) is 0.5 mm or more and 5 m
m or less, preferably the lower limit is 1 mm
As described above, the upper limit is preferably set to 3 mm or less. The flooring groove width is less than 0.5 mm, can not impart sufficient flexibility to the flooring itself, heating panel (50) only by an adhesive or the like becomes difficult to adapt comfortably to, favored not properly.
On the other hand, if the groove width exceeds 5 mm, sufficient strength cannot be obtained in the floor material itself, and the floor material may be inadvertently broken, which is not preferable.

The distance between adjacent grooves (11) is 10
mm and 200 mm or less
The lower limit is 30 mm or more, and the upper limit is 100 mm or less.under
More preferably, the lower limit is 40 mm or more, and the upper limit is 7
It is better to set it to 0 mm or less. Groove spacing is less than 10mm
With no flooring, sufficient strength can be obtained.LaNot preferred
No. If the groove spacing exceeds 200 mm,
It is not preferable because a high flexibility cannot be obtained.

Further, as shown in FIG.
Is formed on the upper surface side of the base plate (10), the groove interval (L) may be set in the same manner as described above.

The intervals between the grooves (11) are not always required to be equal, and may be set at random.
When the groove interval is set at random, a groove interval less than 10 mm or a groove interval exceeding 200 mm may be included.

When the depth of the groove (11) is formed only on the lower surface side of the base plate (10), it is preferable that the depth is set to a depth reaching the intermediate layer (20). And further flexibility can be provided. FIG.
As shown in (a), when the groove (11) is formed on both the lower surface and the upper surface of the base plate (10), the depth of the groove (11) on the lower surface and the groove (11) on the upper surface are determined. By setting the dimension obtained by adding the depth of the base plate to the thickness of the base plate (10) or more, good flexibility can be provided.

The method of forming the groove (11) is not particularly limited. For example, even if the groove (11) is formed by forming a groove on the base plate (10), a plurality of base plate constituent pieces are arranged with a gap provided. May be formed.

The intermediate layer (20) must be made of an elastic material. For example, in addition to a rubber or a synthetic resin foam, a soft elastic material having a rubber hardness of 25 degrees or less according to JIS K6301 A type hardness tester. And the like, specifically, those made of polyvinyl chloride, ethylene vinyl acetate, urethane, synthetic rubber, natural rubber, etc., and in addition to these, those made of nonwoven fabric, insulation board, and the like can be preferably used. .

An inorganic material such as calcium carbonate, clay or silica may be mixed into the elastic material for forming the intermediate layer in order to improve the adhesiveness, heat resistance and machinability. In addition to metal powders such as lead, iron, and aluminum, metal monofilaments, carbon powders, and the like may be mixed in order to improve the quality.

The thickness of the intermediate layer (20) is preferably set to 0.5 mm or more and 5.0 mm or less, and more preferably, the lower limit is set to 1.0 mm or more and the upper limit is set to 3.0 mm or less. Is good. As described above, the floor heating panel (5) has a thickness of the intermediate layer (20) of less than 0.5 mm.
When 0) rises due to thermal expansion, the rise cannot be sufficiently absorbed, and the surface of the flooring material may rise to impair the appearance and the like, which is not preferable. Also,
If it exceeds 5.0 mm, the amount of sinking when walking on the floor becomes large, and a good walking feeling may not be obtained, which is not preferable.

When the intermediate layer (20) is made of a moisture-proof material such as a water-impermeable material, in the flooring product, the moisture sucked up along the groove (11) is reduced by the surface material (3).
0) can be prevented from penetrating, warping, cosmetic material (32)
Can be prevented from being adversely affected by moisture absorption, such as contamination of the surface and delamination.

Even when a moisture-absorbing material is used to form the intermediate layer (20), moisture-absorbing materials such as sticking a moisture-proof sheet or applying a moisture-proof paint to the material. By performing the processing, the above effects can be obtained.

The surface material (30) comprises: a surface substrate (31);
And a decorative material (32) attached to the upper surface thereof.

Among them, a medium fiberboard (MDF) must be used as the surface base material (31), and the thickness is 2.
Those having a diameter of 0 mm to 12.0 mm can be suitably used. If the thickness is less than 2.0 mm, the strength becomes weak, which is not preferable. On the other hand, if it exceeds 12.0 mm, sufficient flexibility cannot be obtained, it becomes difficult to adjust to a floor base such as a floor heating panel, and it becomes difficult to lay construction work using only an adhesive.

As the decorative material (32), a wooden decorative veneer,
A well-known thing such as a pattern printing paper on which a wood pattern and an abstract pattern are printed, a resin sheet, and the like can be used.
It is also possible to apply a known coating treatment to the upper surface of the surface base material (31), and form the decorative material (32) with the coating layer.

In order to balance with the decorative material (32), a sheet material such as a wooden veneer, a nonwoven fabric, a paper, a resin sheet, or a composite sheet thereof is provided on the lower surface side of the surface substrate (31). May be attached.

Further, in the present invention, the surface material (30)
Is composed of a plurality of divided pieces (33). The smaller the size of each divided piece (33), the better. Specifically, it is preferable to use one having a length dimension of about 1350 mm or less, preferably about 1000 mm or less, and more preferably about 600 mm or less. In this case, as described above, due to heating during the heating operation, each of the divided pieces (33) contracts individually, and the amount of contraction increases as the size of the divided piece (33) increases. Therefore, when the interval between adjacent divided pieces (33) is set to 2.0 mm to 1.5 mm, the length of the divided pieces (33) is set to 1350 mm to
It is good to set to 1000 mm, and when setting the interval between the divided pieces (33) to 1.5 mm to 1.0 mm, it is good to set the length of the divided piece (33) to 1000 mm to 700 mm. When the interval between the divided pieces (33) is set to 1.0 mm or less, the length of the divided piece (33) is set to 700 mm.
mm or less.

If the length of the divided piece (33) exceeds 1350 mm, it is difficult to disperse the shrinkage of the entire surface material over the entire area, and a large gap may be formed between the adjacent floor materials at the time of laying. In addition, a large warp is formed on the entire flooring material, and the bonding work cannot be performed smoothly.

In general, the floor material has an irregular pattern, so that the size of the divided piece (33) in the width direction is 60 mm to 10 mm.
About 0mm, length dimension is 150mm ~ 1350m
m. As described above, since the width dimension is considerably smaller than the length dimension, the amount of expansion and contraction in the width direction and the amount of deformation such as warpage are very small as compared with those in the length direction.
No problem occurs due to warpage in the width direction or the like. Therefore, the effect of the present invention can be sufficiently obtained even if the dimension in the width direction of the divided piece (33) is not particularly defined.

[0046] In the present invention, the boundary portion between the divided pieces (33), a groove (11) formed in the base plate (10) that make up so as not to overlap on a line in a plan view. That is, if they overlap on a line, the load may be unintentionally broken at the overlapping portion when a load or the like is applied, which is not preferable.

The method of forming the surface material (30) is not particularly limited. For example, a plurality of divided pieces (33) are prepared in advance, and the divided pieces (33) are attached to the intermediate layer (2).
Even if the surface material (30) is formed by sticking to the intermediate layer (20), it is cut into a plurality of divided pieces (33) using a pressing blade or the like. May be formed. When the surface material (30) is cut with a pushing blade or the like, the intermediate layer (20) may be slightly cut in some cases, but even in such a case, there is no particular problem in the present invention.

In the surface material (30), the adjacent divided pieces (33) may be in contact with each other or may not be in contact with each other. You may make it do. For example, as shown in FIG. 6 (a), even if it is configured such that adjacent divided pieces (33) are in surface contact with each other and the contact surface is arranged perpendicular to the floor material surface direction. As shown in FIG. 6B, the contact surface may be arranged vertically, and a chamfered portion (33a) may be formed at the upper end corner of the divided piece. Further, even if the contact surface is arranged obliquely to the floor material surface direction as shown in FIG. 6C, the contact surface is arranged obliquely as shown in FIG. 6D. And a chamfered portion (33a) may be formed at the upper end corner of the divided piece. Further, as shown in FIG.
3) A contact portion between the members may be configured to have a shape of “C” in a side view, or a chamfered portion (33a) may be formed at a corner of the upper end of the divided piece.

As shown in FIGS. 6 ( c ) to 6 (e), when the contact portions between adjacent divided pieces (33) are arranged obliquely or the like, each divided (3
Even if 3) shrinks and the adjacent divided pieces (33) are separated from each other, the intermediate layer (20) is not seen from the upper side of the flooring material, which is aesthetically advantageous.

The perimeter of the flooring (F) is subjected to a joining process such as a real fruit, a phased fruit, a rough fruit, a chipped portion, etc., so that a gross part (60) and a female porcelain part are provided. Floor material joints such as (70) are formed. There is no particular limitation on the formation position of the floor material joint, and it may be formed on the base plate (10), on the surface material (30), or on both. Good. Further, the shape of the tongues (60) and (70) is not particularly limited, and may be formed in any shape.

The surface material (30) and the intermediate layer (2)
The floor material upper layer made of the above (0) and the base plate (10) are stuck so as to be slightly displaced in the width direction and the length direction of the floor material, that is, so-called “shifting” is performed to join the floor material around the floor material. A part may be formed.

When the tongue portions (60) and (70) are joined, the contact portion between the floor materials at the surface material (30) is, as shown in FIGS. 6 (b), 6 (d), and 6 (e), a chamfered portion (61) is formed. Is also good.

As shown in FIGS. 6 (b) to 6 (e), in the case where the joints between the adjacent floor materials are arranged in an oblique direction or the like, the floor material (F) is Even if the floor material contracts and separates adjacent floor materials, the tongue portion (6
0) (70) and the like are not seen, which is aesthetically advantageous.

Incidentally, the decorative flooring material of the present invention can be suitably used for floor finishing of a floor heating system, but the use is not limited, and it can be used for floor finishing other than the floor heating system. it can.

[0055]

EXAMPLES Examples of the present invention, comparative examples and reference examples for deriving the effects thereof will be described below.

<Example 1> As a base plate, 1.7 on the lower surface side, substantially parallel to the floor material width direction.
A Rawan plywood plate having a plurality of grooves each having a width of 55 mm and formed at intervals of 55 mm is used. The intermediate layer provided on the base plate has a foaming ratio of 12 times and a thickness of 1.000 mixed with calcium carbonate. The surface material provided on the intermediate layer is made of a 5 mm polyethylene foam, and the surface material is 2.7
A decorative material consisting of a decorative veneer with a thickness of 0.3 mm was applied to a medium fiberboard (surface base material) with a thickness of 0.3 mm, and the surface material constituting plate was subjected to a coating treatment and divided into a plurality of pieces (dimensions of divided pieces). Is 75mm in width
(The length is 150 mm to 900 mm) to prepare a decorative flooring material having a thickness of 13 mm, a width of 300 mm, and a length of 1800 mm. At this time, as shown in FIG. 6B, the contact portions between the adjacent divided pieces (33) and the contact portions between the surface materials (30) between the adjacent floor materials are configured to be vertical surfaces. At the same time, chamfered portions (33a) and (61) are formed at the upper end portions of both contact portions.

On the other hand, a floor heating panel consisting of a hot water hard panel (thickness: 11.5 mm, length: 1700 mm, width: 850 mm) in which a copper pipe for hot water is embedded in a particle board and aluminum plated steel sheets are adhered on both sides, The decorative floor material was laid on the floor heating panel by screws, and the one-part urethane-modified adhesive was bonded to the backside of the floor heating panel.

At the time of this construction, the floor material had sufficient flexibility, could be easily adapted to the floor heating panel, and the construction could be performed easily. In addition, although the floor material was swollen by absorbing the solvent in the adhesive on the lower surface, the solvent was absorbed by the grooves, so that the floor material did not deform harmfully, such as warpage.

Next, for the decorative floor material on the floor heating panel,
A floor heating test was performed. That is, curing for 7 days (leaving)
After that, by passing hot water of 80 ° C. through the steel pipe of the floor heating panel, the surface of the floor material was set to 30 ° C. for 60 hours continuously, and then the hot water was stopped for 24 hours to cool down.
The floor material surface was set to 30 ° C. again for 60 hours by passing hot water again.

As a result, the flooring material was slightly warped and the end portions were swelled, but they did not impair the aesthetic appearance. Furthermore, no lifting due to peeling was observed,
No trampling sound was generated when walking on the floor.

The gap between adjacent floor materials during drying shrinkage and the space between divided pieces in the same floor material are 0.1 mm in the width direction and 0.2 mm in the length direction between the surface materials. １．０1.0 mm (average 0.65 mm), but this was not enough to impair the aesthetic appearance.

On the other hand, the above-mentioned floor material was applied to the above-mentioned floor heating panel together with glue nails, and the same test was carried out. As a result, the same good results as above were obtained.

Further, 150 mm × 150 mm
mm test piece was cut out, and the test piece was subjected to a repeated cold test. That is, the test piece was heated in an atmosphere at 80 ° C. for 2 hours, then cooled at −20 ° C. for 2 hours, and this was repeated as one cycle, followed by eight cycles.
The number of cracks on the surface was measured. As a result, the number of cracks was two.

<Example 2> A surface material was formed in the same manner as in Example (1) above, except that the surface material was constituted by a plurality of divided pieces having a width of 75 mm and a length of 150 mm to 600 mm arranged in an irregular pattern. By
A decorative flooring material having a thickness of 13 mm, a width of 150 mm, and a length of 900 mm was produced.

The decorative floor material was bonded to the floor heating panel in the same manner as described above by applying an adhesive to the back side and the floor material joint.

At the time of this construction, since the flooring material had sufficient flexibility and was small in size, it could be carried out more easily than the construction work of the above-mentioned embodiment (1).

Subsequently, the floor material was subjected to the same floor heating test as described above. As a result, the floor material showed almost no problems such as warpage, swelling at the end, and floating due to peeling, and the flooring caused by walking No sound was produced.

Further, the gap between adjacent floor materials during drying shrinkage and the gap between divided pieces in the same floor material are 0.2 mm to 0.5 mm in the length direction between the surface materials.
mm (average 0.38 mm), but not so much as to impair the aesthetic appearance.

Further, the floor material of the present embodiment was applied to the above floor heating panel together with glue nails, and a similar test was carried out.
Good results were obtained as above.

Further, a test piece was cut out from this floor material and subjected to repeated cold and heat tests as described above. As a result, two cracks were found.

<Embodiment 3> As shown in FIG. 6 (d), the contact portions between the adjacent divided pieces (33) and the contact portions between the surface materials (30) between the adjacent floor materials are defined as inclined surfaces. In addition, a decorative flooring material having the same configuration as in Example (2) above was produced except that chamfered portions (33a) and (61) were formed at the upper end portions of both contact portions.

The decorative floor material was coated with an adhesive only on the back side (not applied to the joint portion of the floor material) and bonded to the floor heating panel in the same manner as described above.

The construction work at this time is as described in the above embodiment (2).
Similarly, it was easy to do.

Further, when a floor heating test similar to that described above was conducted, the floor material showed almost no problems such as warpage, swelling of edges, and floating due to peeling.
No squealing noise was produced by walking.

Further, the gap between adjacent floor materials during drying shrinkage and the gap between divided pieces in the same floor material are 0.3 mm to 0.7 mm in the length direction between the surface materials.
mm (average 0.5 mm), but hardly noticeable, and did not impair the aesthetic appearance.

Further, the floor material of this example was applied to the above-mentioned floor heating panel in combination with glue nails, and a similar test was carried out. As a result, similar good results were obtained.

Further, a test piece was cut from the floor material,
When the cold repetition test was performed in the same manner as described above, two cracks were found.

<Comparative Example 1> A decorative veneer having a thickness of 0.3 mm was stuck on a 12 mm-thick Lauan plywood and subjected to a coating treatment to give a thickness of 12.3 m.
m, a decorative flooring material having a width of 300 mm and a length of 1800 mm were produced.

An attempt was made to apply this decorative floor material to the same floor heating panel as described above using only an adhesive, but the floor material was slightly warped and could not be adapted to the floor heating panel, and could not be applied. Was. For this reason, nailing was used in combination.

At the time of this construction, the floor material has insufficient flexibility, and it is difficult to adapt the floor material to the floor heating panel, and it is difficult to join the floor materials with the floor material, which makes workability difficult. Was.

Subsequently, the floor material was subjected to the same floor heating test as described above. As a result, a swelling of about 0.5 mm and unevenness of about 1.5 mm were observed at the joint end, and the appearance was poor. Met. Further, between the floor materials, 1.
A large gap of 3 mm was formed, and the appearance was very impaired. When walking on the swell, an unpleasant treading sound was generated.

On the other hand, a test piece was cut out from this floor material,
When a cold repeated test was performed in the same manner as described above, 51 cracks were found.

<Comparative Example 2> The floor material dimensions were as follows: thickness 12.3, width 150 mm, length 900
A decorative flooring was produced in the same manner as in Comparative Example (1), except that the thickness was changed to mm.

When this floor material was applied to the same floor heating panel as above, the same as in Comparative Example (1),
It could not be constructed with only adhesive, and had to use nailing together.

At the time of this construction, the flooring material was smaller in size than that of the comparative example (1), and the workability was better than that.
Workability was difficult. Further, even with nailing, the warpage could not be reliably corrected, and there was unevenness of about 0.5 mm.

Subsequently, the floor material was subjected to the same floor heating test as described above. As a result, an unevenness of about 1.5 mm was recognized, which impaired the appearance.

Further, a test piece was cut out from the floor material,
When a cold repeated test was performed in the same manner as described above, 51 cracks were found.

Reference Example 1 The above embodiment (1) except that the surface material was not divided.
By configuring in the same manner as described above, a decorative flooring material was produced.

When this floor material was applied to the same floor heating panel as above using only an adhesive, it could be smoothly carried out as in Example (1).

Subsequently, a floor heating test similar to the above was performed on this floor material. As a result, a large gap of 2.0 mm was formed between adjacent floor materials, and a further 0.4 mm to 0.6 mm
A degree of unevenness was formed, and the appearance was impaired.

In the cold repetition test, two cracks were found.

Reference Example 2 The above embodiment (2) except that the surface material was not divided.
In the same manner as in the above, a decorative floor material was produced.

When this floor material was applied to the same floor heating panel as described above with only an adhesive, the operation could be performed smoothly as in Example (2).

Further, the floor material was subjected to the same floor heating test as described above. As a result, a large gap of 1.1 mm was formed between the adjacent floor materials, and a further 0.3 mm to 0.5 mm
A degree of unevenness (swelling) was also formed, impairing the appearance.

In the cold repetition test, two cracks were found.

<Evaluation> As is clear from the present embodiment, the decorative flooring materials according to the first to third embodiments related to the present invention can be easily applied to the floor heating panel, and can be used for the floor heating test and the like. Therefore, no problem occurs, and the device can be suitably used for a floor heating system. On the other hand, the decorative flooring materials of Comparative Examples 1 and 2, which are not related to the present invention, are difficult to apply to the floor heating panel,
It is unsuitable for a floor heating system because a defect occurs in a floor heating test and the like. The decorative flooring materials of Reference Examples 1 and 2 are easy to construct, but have a defect in a floor heating test and the like. This is unsuitable for floor heating systems.

[0097]

As described above, according to the decorative flooring material of the present invention, the surface material made of the medium fiberboard and the surface material made of the decorative material are placed on the base plate via the intermediate layer made of the elastic material. Since a plurality of grooves are formed on at least the lower surface side of the base plate, sufficient flexibility is imparted to the floor material itself,
It fits comfortably into the floor base of a heating panel or the like, and the construction using only the adhesive can be performed smoothly. Furthermore, since the base plate is formed with a groove and an elastic intermediate layer is provided thereon, the base plate constituent pieces divided by the groove move respectively following the expansion of the metal panel of the floor heating panel. Due to this, the movement of the upper side of the metal panel is not restricted,
The end of the metal panel does not peel off from the heat radiating panel and rises, so that a good aesthetic appearance can be obtained, and an unpleasant treading noise does not occur and a comfortable walking feeling can be obtained.

Further, since the surface material is composed of a plurality of divided pieces, when heated by a floor heating panel or the like, each of the divided pieces contracts individually, so that the positional change of the end portion of the surface material becomes small. Therefore, a large gap is not formed between the adjacent flooring materials, and a good appearance can be obtained. Further, since each of the divided pieces is individually deformed such as a warp, a large warp is not synergistically formed. In addition, the construction work can be performed more smoothly, and after the construction, the occurrence of lifting can be prevented, so that a better walking feeling and a better appearance can be obtained.

Further, since a hard medium fiberboard excellent in surface smoothness and homogeneity is used as a surface substrate,
The surface can be satisfactorily finished and the occurrence of cracks can be prevented, so that a better appearance can be obtained.

Further, since an elastic material is used as an intermediate layer interposed between the base plate and the surface material, for example, when applied to a floor heating panel, the ends of the floor heating panel are caused to expand by thermal expansion. Even if it pushes strongly and lifts up, and even if it is pushed further, and the base plate lifts up, the middle layer elastically contracts, ensuring the smoothness of the floor material surface, and from this point also good aesthetics Can be secured. In addition, the difference between the contraction and the expansion coefficient between the base plate and the surface material is absorbed by the elastic expansion and contraction of the intermediate layer, so that it is possible to prevent the deformation such as warpage that is harmful at the time of construction or aesthetically.

[Brief description of the drawings]

FIG. 1 is a perspective view of a decorative flooring as an example of the present invention when viewed from the upper surface side.

FIG. 2 is a perspective view when the decorative floor material of the above example is viewed from the lower surface side.

3A is a sectional view taken along the line IIIa-IIIa of FIG. 1, and FIG. 3B is a sectional view taken along the line IIIb-IIIb.

FIG. 4 is a cross-sectional view showing a state where the decorative floor material of the above example is applied.

FIG. 5 is a cross-sectional view showing a modification of the groove in the decorative flooring material of the present invention.

FIG. 6 is a cross-sectional view showing a modified example of a split piece joint and a floor material joint in a floor material of the present invention.

FIG. 7 is a cross-sectional view showing a state in which a conventional floor material is installed.

[Explanation of symbols]

10 ... Base plate 11 ... groove 20 ... Intermediate layer 30 ... surface material 31 ... Surface substrate 32 ... Cosmetic material 33… Split pieces F ... decorative flooring

   ────────────────────────────────────────────────── ─── Continuation of front page       (56) References JP-A-63-107649 (JP, A)                 JP-A-3-233072 (JP, A)                 JP-A-61-85608 (JP, A)                 Actual opening Hei 5-42492 (JP, U)

Claims (2)

(57) [Claims] 1. A decorative flooring material provided on a base plate via an intermediate layer made of an elastic material, wherein the surface material made of a medium fiberboard and the decorative material provided on the upper surface thereof are provided. A plurality of grooves are formed on at least the lower surface side of the base plate, and the surface material is constituted by a plurality of divided pieces , and the boundary between the divided pieces and the grooves overlap on a line in plan view.
A decorative flooring material characterized in that it is configured so as not to fit together. 2. The decorative flooring according to claim 1, wherein a size corresponding to a length direction of the flooring of the divided piece is set to 1350 mm or less.