JP3451484B2 - Flooring blocks - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flooring block for floor finishing, which is laid directly or indirectly on a building floor.

[0002]

2. Description of the Related Art In recent years, floors finished by laying flooring blocks on concrete slabs have been widely used in buildings for various purposes such as offices, houses, shops, schools and the like. As shown in FIG. 4, this flooring block usually has a plurality of surface plates 11, 11, ...
The back surface material 12 is adhered and laminated on the back surface of 11 ,. Here, each front plate 11 is a plywood obtained by laminating and laminating a plurality of thin single plates so that the fiber directions are alternately orthogonal to each other, and the backing material 12 is a soft foam plastic sheet.

[0003]

However, such conventional flooring blocks have the following problems. (1) Since a large amount of adhesive is used for the surface plate 11 to bond a plurality of single plates, a large amount of harmful substances such as formaldehyde are released indoors, causing sick house syndrome. Especially when using floor heating in hot and humid seasons from June to September and in winter, F1
Even in a new house using plywood building materials with specifications, the indoor formaldehyde concentration standard set by the Ministry of Health and Welfare will be greatly exceeded, which will have a serious adverse effect on the human body.

(2) Since the plywood obtained by laminating thin veneers is the surface plate 11, the durability as a floor finishing material is poor, and after several years, numerous small cracks are generated in the surface plate 11. I will end up.

(3) Since the plywood obtained by laminating thin single plates serves as the surface plate 11, it lacks the warmth and taste appealing to the five senses as a floor finishing material.

(4) Since a plurality of surface plates 11, 11, ... Are directly bonded and fixed to each other, they lack flexibility for expansion and contraction due to changes in water content and temperature. That is, since the expansion and contraction of each surface plate 11 is restricted by the other adjacent surface plate 11, the surface plate 11 is cracked or warped.

(5) When a flooring block is used as a finishing material for an OA floor, it is necessary to form notches or holes for electric wiring in the flooring block each time due to frequent changes in office layout. , Requires time and effort for construction.

The present invention has been made in view of the above circumstances, and its purpose is to have no adverse effect on the human body, have high durability, have a good taste, and cause cracks or warpage on the surface plate. The point is to propose a flooring block that can handle frequent office layout changes without doing so.

[0009]

The invention according to claim 1 is
A surface layer formed by horizontally arranging a plurality of surface plates made of solid wood based material with a gap between each other, and a back surface layer made of a foamed plastic sheet laminated on the back surface of the surface layer,
E Bei and a connecting member for connecting the plurality of surface plates, wherein
The connecting material is made of plywood or solid wood,
Arranged in a direction orthogonal to the fiber direction of each surface plate,
The flooring block is characterized in that it penetrates each surface plate and is firmly fixed to them.

Since such a flooring block uses a solid wood-based material as the surface plate constituting the surface layer instead of the conventional plywood, it does not emit harmful substances indoors, has high durability and is delicious. Further, the plurality of surface plates constituting the surface layer are not directly fixed to each other by adhesion, but the respective surface plates are arranged horizontally with a gap therebetween and then indirectly connected by a connecting member. For,
Even if each surface plate expands or contracts due to a change in water content or a change in temperature, the surface plates do not interfere with each other, and the surface plate is not cracked or warped. As with the conventional flooring block, it has a back layer made of a foamed plastic sheet, so its internal air bubbles and elasticity provide high soundproof performance, good walking feeling, and safety at the time of falling, so that standing work for a long time can be achieved. Even if you do not feel tired legs.

According to a second aspect of the present invention, the flooring block according to the first aspect is characterized in that cutouts or holes for electric wiring are formed so as to penetrate in the thickness direction.

In such a flooring block, since notches and holes for electric wiring are formed in advance in the thickness direction, it is necessary to newly provide notches and holes for electric wiring every time the office layout is changed. It is especially suitable as a finishing material for OA floors.

The invention according to claim 3 is the flooring block according to claim 1 or 2, characterized in that a plurality of grooves are formed on the back surface of the front plate.

Since such a flooring block has a large number of air layers formed between the front surface layer and the back surface layer by a plurality of grooves formed on the back surface of the front surface plate, it exhibits higher soundproofing performance. In addition, the efficiency of heat retention during floor heating is high.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the description, the same elements will be denoted by the same reference symbols, without redundant description.

1. Overall Configuration FIGS. 1 (a) and 1 (b) are a partially broken front perspective view and a partially broken back perspective view showing an embodiment of a flooring block according to the present invention. Flooring block 1 shown in FIG.
Has a two-layer cross-sectional structure of the front surface layer 2 and the back surface layer 3,
The surface layer 2 is formed by horizontally arranging surface plates 2a, 2a, ... Made of solid teak plates as a solid wooden material with a gap between them, and the back surface layer 3 is made of a foamed polyurethane sheet as a foamed plastic sheet. Further, the surface layer 2 penetrates through the surface plates 2a, 2a, ...
Are built in, and the surface plates 2a, 2a, ... Are fixed to the connecting members 4, 4 ,. Further, a notch 5 for electric wiring having a semicircular shape in plan view is formed at a predetermined position of the flooring block 1 so as to penetrate therethrough in the thickness direction. The flooring block 1 is laid directly on the concrete slab 7 as shown in FIG. 2, or as a finishing material for a double floor (OA floor) as shown in FIG. 3, that is, it is erected on the concrete slab 7. It is laid on the floor panel 9 supported by the supporting legs 8, 8 ,.

2. Composition of each part (1) Surface layer The solid teak plate that constitutes the surface plate 2a of the surface layer 2 is made by processing teak, which is a high-grade wood species, into a solid plate material. Not only does it give a feeling, but it also excels in heat insulation. Further, unlike plywood, which has a life of about several years as a floor surface material, the floor surface material having a life of 100 years or more is excellent in durability and contributes to resource saving.
Moreover, unlike plywood, solid teak does not emit harmful substances such as formaldehyde indoors, making it suitable for nature and health consciousness in recent years.

The wood removal of the surface plate 2a is a wood-cutting operation in which the longitudinal direction is the fiber direction (the trunk axis direction of the wood) and the short direction is the grain direction (the radial direction of the annual rings of the wood). The surface layer 2 is formed by arranging 3 to 15 surface plates 2a in the lateral direction while leaving a slight gap therebetween, and in this case, arranging four surface plates 2a. The plane shape of the entire surface layer 2 is 250 to 1 on one side.
It is desirable to have a square shape of 000 (mm), and it is particularly desirable to set the length of one side to 499.2 to 499.8 (mm). The floor dimension of a flooring block for a general OA floor is 500 (mm) x 500 (mm), but when the office layout is changed, the flooring block 1 is attached to the floor surface ( Concrete slab 7 in Figure 2 and floor panel 9 in Figure 3)
This is because it is convenient to set a slightly shorter plane size in consideration of removal from the. Adjacent surface plate 2
The distance between a and 2a is preferably set to 0.3 to 0.8 (mm). If it is smaller than 0.3 (mm), each surface plate 2
This is because when a is swollen, the surface plates 2a interfere with each other and the flooring block 1 is warped, and if it is larger than 0.8 (mm), the gap becomes too conspicuous.

The surface plate 2a preferably has a thickness of 7 to 15 (mm). If it is thinner than 7 (mm), the load bearing performance is small, and if it is thicker than 15 (mm), it is difficult for heat to be transferred to the floor surface when a floor heating system is adopted.

As shown in FIG. 1, vertical grooves 6, 6, ... Are formed on the back surface of the front plate 2a to form a large number of air layers, so that the flooring block 1 has a high soundproof performance. . Furthermore, when a floor heating system in which a heat source is arranged on the back surface of the flooring block 1 is adopted, the heat retaining efficiency is improved by this air layer.

The depth of the vertical groove 6 is preferably 1/10 to 2/10 of the thickness of the surface plate 2a. The grain strength of wood is 1/10 to 1/15 of the fiber strength.
To a small extent (anisotropy of wood strength), increasing the depth of the flutes 6 will further reduce the strength in the small grain direction, and even considering soundproofing performance and heat retention efficiency. This is because it is not preferable in terms of strength. In addition, the expansion / contraction rate of wood in the grain direction and the grain direction is 10% of that in the fiber direction.
~ 20 times (anisotropy of wood expansion and contraction rate), vertical groove 6
Also plays a role of preventing the surface plate 2a from warping in a concave shape in the direction of the grain.

Further, a plurality of lateral grooves (not shown) orthogonal to the vertical grooves 6 may be formed on the back surface of the front plate 2a. The depth of this lateral groove is 3/10 to 9/10 of the thickness of the surface plate 2a.
Is desirable. Due to the anisotropy of the wood strength described above, there is no problem in strength even if the depth of the transverse groove is made larger than that of the longitudinal groove 6, but rather the volume of the air layer is increased by increasing the depth of the transverse groove, and the flooring This is because the soundproofing performance and heat retention efficiency of the block 1 are improved. The vertical groove 6
Since the formation of the horizontal groove and the lateral groove gives flexibility to the surface layer 2, unevenness of the floor base surface (for example, unevenness on the surface of the concrete slab 7 in FIG. 2 or between the floor panels 9 and 9 in FIG. 3). It not only enhances the ability to follow a step, etc.) but also gives a good walking feeling and enhances safety in the event of a fall. The vertical groove 6 and the horizontal groove may or may not be provided so as to pass through the connecting member 4.

For both the vertical groove 6 and the horizontal groove,
The groove width is 0.5 to 3.0 (mm), and the interval between the grooves is 5 to
It is desirable to set it to 30 (mm). This is to prevent the surface plate 2a from cracking due to stress concentration.

It is desirable that the plane shape of the surface layer 2 is designed so that the flooring block 1 can be easily removed when the office layout is changed.
When it is not necessary to remove the flooring block 1, a fitting concave portion or a fitting convex portion may be formed on the side surface of the surface layer 2 for fitting with the adjacent flooring block 1 without a gap (not shown). ).

The surface plate 2a is not limited to the solid teak plate, and it goes without saying that a solid plate of other wood species can be used as the surface plate. Further, the forms of the vertical grooves 4 and the horizontal grooves formed on the back surface of the surface plate 2a are not limited to those shown here, and appropriate modifications can be made.

(2) Back surface layer The foamed polyurethane sheet constituting the back surface layer 3 serves as a cushioning material that softly receives the impact applied to the front surface layer 2 when it is stepped on and prevents a great load on the foot. In addition, it plays a role as a soundproof material for reducing a light weight floor impact sound generated by a spoon falling on the surface plate 2a, and the step load applied to the surface layer 2 is dispersed and transmitted to the concrete slab 7 and the floor panel 9. It also serves as a land adjustment material.

If the back surface layer 3 is too soft, the amount of depression during walking will be too large to give a bad walking feeling and the furniture will be shaken. Therefore, the expansion ratio of the foamed polyurethane sheet is 25 times or less. It is desirable to do.

The thickness of the foamed polyurethane sheet constituting the backing material 3 is preferably 1 to 10 (mm). 1
If it is thinner than (mm), it hardly shows its effect as a cushioning material, soundproofing material, and unevenness adjusting material, and if it is thicker than 10 (mm), the amount of depression when walking is too large and the walking feeling is bad, and the furniture is This is because there are inconveniences such as shaking.

The material of the back surface layer is not limited to the foamed polyurethane sheet, and instead of this, a foamed plastic sheet such as a foamed polypropylene sheet, a foamed polyethylene sheet, or a foamed polystyrene sheet can be used. Any material may be used as long as it exerts an effect as a material, a soundproofing material, and an unsteady material.

Further, since the velcro tapes 3a are provided at predetermined positions on the back surface of the back surface layer 3, here in the vicinity of the four corners,
As shown in FIGS. 2 and 3, if the corresponding Velcro tapes 7a and 9a are provided on the floor base surface, the flooring block 1 can be easily removed or attached from the floor base surface when the office layout is changed. be able to.

(3) Connecting material As shown in FIG. 1, the connecting materials 4, 4, ...
is a member arranged so as to penetrate the back side of a, 2a, ... With a predetermined thickness, and is made of plywood or solid wood. The connecting members 4 are arranged in a direction orthogonal to the fiber direction of the front surface plates 2a, 2a, ..., And 3 to 15, three in this case, are arranged at predetermined intervals in the fiber direction of the respective front surface plates 2a, 2a ,. Has been. The length of the connecting member 4 is about the same as the side length of the flooring block 1, the width is 15 to 50 (mm), and the thickness is 2 to 10.
It is desirable to set it to about (mm). The connecting member 4
If the strength is too high, the flexibility of the flooring block 1 is impaired, and the ability to follow the unevenness of the floor surface is reduced, and if the strength is too low, cracks may occur when the flooring block 1 is attached or removed. become.

The surface plates 2a, 2a, ... Are not directly adhered and fixed to each other, but are fixed to the connecting members 4, 4 ,.
The structure a does not interfere with the other surface plate 2a even when it expands or contracts due to changes in water content or temperature, and has a structure capable of preventing cracks or warpage of the surface plate 2a. In addition, flooring block 1
It is desirable that the surface plate 2a and the connecting member 4 be firmly fixed by an air tacker or the like after applying an adhesive in order to prevent the change in the outer dimensions of the device and the prevention of the floor squeal.

Although the connecting material 4 is embedded in the surface layer 2 here, the connecting material 4 may be incorporated in the back surface layer 3 or may be embedded in both the surface layer 2 and the back surface layer 3. It may have been done. In addition, the material, shape, number, arrangement form, etc. of the connecting members 4 are not limited to those shown here, and may be implemented with appropriate modifications.

(4) Cutout 5 for electric wiring The cutout 5 for electric wiring is here the flooring block 1.
It is a semicircular cutout centered on the midpoint of one side, and is joined with the cutout 5 for electric wiring of another flooring block 1,
One electric wiring hole that matches the electric wiring hole provided in the floor panel 9 is formed. In particular, by preparing the same number of square-shaped flooring blocks 1, 1, ... Where the cutouts 5 for electric wiring are different by 90 °, the flooring blocks 1 are arranged in a checkered pattern as shown in FIGS. 2 and 3. , 1,… can be laid out side by side. However, the present invention is not limited to this, and a polygonal cutout may be used instead of the semicircular cutout, and an electric wiring hole independently formed at an appropriate position of one flooring block 1. May be provided, and the notch 5 for electric wiring or the hole for electric wiring may not be provided at all. However, when the cutout 5 for electric wiring and the hole for electric wiring are provided, a semicircular cutout having a radius of 45 to 50 (mm) should be provided at a position shown in the figure from an aesthetic and practical viewpoint. Is desirable. Needless to say, it is desirable to provide the notch or the hole at a position where the connecting member 4 is not largely damaged. In addition, the shape, position, size, etc. of the cutouts 5 for electric wiring and the holes for electric wiring are not particularly limited, and appropriate modifications are made.

3. To remove the flooring blocks 1, 1, ... laid on the other floor base surface, for example, as shown in FIG.
If the suction plate 10 sucks the surface plate 2a of the flooring block 1 and lifts it as it is, the flooring block 1 can be easily removed from the floor base surface and can be reused.

[0036]

<Example 1> The flooring block 1 was placed in an artificial drying device having a temperature of 57 to 62 (° C) and a relative humidity of 42 to 51 (%) for 72 hours, and the flooring block 1 was exposed to changes in water content and temperature. The dimensional change and the degree of warpage were measured. Further, a flooring block A in which four solid teak plates which are exactly the same as the flooring block 1 were directly fixed to each other with an adhesive was prepared, and the measurement results under the same conditions were compared.
In addition, in both the flooring block 1 and the flooring block A, the thickness of the back surface layer 3 is 10 (mm) and 5
(Mm) and two types were tested, and the average value was adopted as the measurement result. The measurement results are shown in Table 1.

[0037]

[Table 1]

As can be seen from the table, since the flooring block A has shrunk by 5.4 (mm) in the direction of the grain, the gap between the flooring blocks A and A is too conspicuous when laid on the floor base surface. The flooring block 1 shrinks only 0.5 (mm) in the grain direction, and the gap between the flooring blocks 1 and 1 does not matter when laid on the floor surface. That is, in the flooring block 1, unlike the flooring block A, the surface plates 2a, 2a forming the surface layer 2 are not directly bonded and fixed to each other, but the surface plates 2a, 2a ,. Since they are horizontally arranged and indirectly connected by the connecting members 4, 4, ... Having a small expansion / contraction rate, even if each surface plate 2a expands / contracts, the influence does not reach the entire flooring block 1, It has been demonstrated to have extremely high dimensional stability.

Further, the flooring block A was originally warped 2.3 (mm) in a concave shape in the grain direction, and further 4.5 (mm) was warped after artificial drying, which made it unusable. In contrast, flooring block 1
There was no warp in the grain direction before and after artificial drying. That is, the vertical grooves 6, 6, ... Bored on the back surface of the surface plate 2a are
It was confirmed that the flooring block 1 plays a role of preventing warping in a concave shape in the direction of the grain.

<Example 2> Based on a formaldehyde emission test in JAS "Agricultural Standards for Flooring",
When the emission amount of formaldehyde of the flooring block 1 used in Example 1 was measured using a spectrophotometer UV-2500PC (manufactured by Shimadzu Corporation), the emission amount of formaldehyde was 0 (mg / L). It was Considering that if the emission amount of formaldehyde is 0.5 (mg / L) or less, the F1 notation that the emission amount of formaldehyde is the smallest in the JAS standard is taken into consideration, the flooring block 1 is extremely harmless to the human body. I understand.

<Example 3> Based on JIS A 6519, the hardness value of the flooring block 1 used in Example 1 was measured. According to the same standard, for example, the hardness of the floor of the gymnasium is preferably 100 G or less from the viewpoint of safety,
The hardness value of the flooring block 1 is about 96G,
The flooring block 1 softly absorbs the initial impact,
It was confirmed that the structure is safe to ensure the safety of the elderly and children when they fall.

[0042]

As described above, according to the first aspect of the present invention, it is possible to realize a flooring block in which harmful substances are not diffused indoors, have high durability, and have a good taste. Further, even if each surface plate expands or contracts due to a change in water content or a change in temperature, the surface plates do not interfere with each other, and the surface plate is not cracked or warped.

According to the second aspect of the present invention, it is not necessary to form notches or holes for electric wiring each time the office layout is changed, and a flooring block particularly suitable as a finishing material for an OA floor is realized. can do.

Further, according to the invention of claim 3, since a plurality of air holes are formed between the front surface layer and the back surface layer by the plurality of grooves formed on the back surface of the front surface plate, it is possible to increase the height. In addition to exhibiting soundproofing performance, it also increases the heat retention efficiency during floor heating.

[Brief description of drawings]

FIG. 1A is a partially cutaway front perspective view showing an embodiment of a flooring block according to the present invention, and FIG. 1B is a cutaway rear perspective view of the same portion.

FIG. 2 is a perspective view showing a laid state of the flooring block of FIG.

FIG. 3 is a perspective view showing another laid state and a detached state of the flooring block of FIG. 1.

FIG. 4A is a front perspective view showing a conventional flooring block, and FIG. 4B is a rear perspective view of the same.

[Explanation of symbols]

1… Flooring block 2 ... Surface layer 2a ... Surface plate 3 ... Back layer 3a ... Velcro 4 ... Connecting material 5… Notch for electrical wiring 6 ... Vertical groove 7… Concrete slab 7a ... Velcro 8 ... Support legs 9… Floor panel 9a ... Velcro 10 ... sucker 11 ... Surface plate 12… Back material

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Narumi Usui 3-15-7 Nishishinjuku, Shinjuku-ku, Tokyo MH building, 2nd floor, Myanmar Teak Sales Co., Ltd. (56) Reference JP 5-25914 (JP, A) JP 11-280247 (JP, A) JP 6-330610 (JP, A) Registered utility model 3068323 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) E04F 15/04 601

Claims (3)

(57) [Claims] 1. A surface layer in which a plurality of surface plates made of solid wood is arranged horizontally with a gap between each other, and a back layer made of a foamed plastic sheet laminated on the back surface of the surface layer, sheets of a connecting member for connecting the surface plate, Bei example, said coupling member is a made of plywood or solid plate,
Arranged in a direction orthogonal to the fiber direction of each surface plate,
It penetrates through each of the surface plates and is firmly fixed to them.
That, flooring blocks, characterized in that. 2. The flooring block according to claim 1, wherein notches or holes for electric wiring are formed so as to penetrate therethrough in the thickness direction. 3. The flooring block according to claim 1 or 2, wherein a plurality of grooves are formed on the back surface of the front plate.