JP6486038B2 - Wooden flooring - Google Patents

Description

  The present invention relates to a wooden floor material in which an impact buffer is laminated on the back surface of a wooden base material.

  Conventionally, wood-based flooring has been laid directly on a concrete slab or on a discarded plywood laid on the concrete slab. When an impact load is applied to the surface of a wooden flooring material, the impact sound propagates from the front surface to the backside. Therefore, many wooden flooring materials have been proposed from the viewpoint of soundproofing against such impact sound. ing.

  For example, a wooden base material in which narrow concave grooves are formed at predetermined intervals on the back surface, and a wooden floor material in which an impact cushioning material such as a soft foamed resin is attached to the back surface side has been proposed (for example, , See Patent Document 1). According to this wooden flooring, when an impact load acts on the surface of the wooden flooring, the impact buffering material compresses and deforms to absorb the impact load and improve the soundproofing of the wooden flooring. Can do. Further, due to the presence of the narrow groove, the impact sound caused by the impact load can be absorbed in the groove.

  In addition to this, the sound-absorbing base material disposed between the wooden floor material and the floor base surface is laminated and integrated on the nonwoven fabric layer formed using resin fibers. A sound-absorbing base material provided with a resin sheet has been proposed (see, for example, Patent Document 2). The resin sheet is formed with a large number of protrusions that protrude toward the nonwoven fabric layer located below and fit into the nonwoven fabric layer. According to this sound absorbing base material, the sound generated on the surface of the wooden floor material is absorbed in innumerable fine spaces in the nonwoven fabric layer. When the protrusions of the resin sheet are fitted into the nonwoven fabric layer, the impact sound from the resin sheet surface can be further absorbed by the nonwoven fabric layer.

JP 2007-198084 A JP 2005-273274 A

  However, in the wood-based flooring shown in Patent Document 1, if the impact buffering material is further subjected to a soundproofing effect, the impact buffering material will be thickened. May be inhibited.

  On the other hand, if a sound absorbing base material is used as shown in Patent Document 2, the soundproofing property of the wooden floor material can be enhanced by the nonwoven fabric layer of the sound absorbing base material. However, since the resin sheet of the sound-absorbing base material and the wooden flooring are integrated with, for example, an adhesive, even if an impact load is applied to the wooden flooring, the wooden flooring is difficult to bend. Absorbing impact energy cannot be expected to improve soundproofing against impact sound.

  The present invention has been made in view of the above points, and the object of the present invention is to provide soundproofing against impact sound even if an impact load acts on the surface without impairing the stepping comfort of the flooring. The object is to provide a wooden flooring that can enhance the quality.

  As a result of repeated studies, the inventor, when an impact load is applied to the surface of the wooden floor material, due to both deformation of the shock buffer material and deformation (deformation) of the wooden base material, It was thought that if the impact energy could be absorbed, the soundproofing property against impact sound could be improved. At this time, if the amount of compressive deformation of the shock absorbing material is too large, the floor material surface sinks when the floor material surface is stepped on. We obtained new knowledge that if the wood base material can be bent after being restricted, the soundproofing property against the impact sound can be improved while ensuring the tread on the flooring surface.

  The present invention is based on this new knowledge. The wooden flooring according to the present invention includes a wooden base material, an impact cushioning material laminated on the back surface of the wooden base material, and the impact cushioning material. A flooring material comprising at least a sheet material laminated on the back surface, wherein the sheet material is formed with a plurality of protrusions projecting toward the shock-absorbing material side, and each protrusion is The sheet is embedded in the shock-absorbing material, and a buffer layer made of a part of the shock-absorbing material is formed between the tip of each projection and the back surface of the wooden base material. A material is laminated on the shock absorbing material.

  According to the present invention, when an impact load is applied to the surface of the wooden base material, the buffer layer of the impact buffer material is partially compressed and deformed so as to absorb the impact load. At this time, when the buffer layer reaches the compression limit, the impact load acting on the wooden floor material is supported at the tip of each projection, and therefore, the compression deformation of the shock buffer material is limited. In this state, even if an impact load is applied, the wood base is supported locally at the tip of the projecting portion spaced apart via the shock absorbing material. Can be bent.

  As a result, when an impact load is applied to the surface of the wooden base material, the buffer layer of the shock absorbing material may partially compress and deform to absorb the impact load, and the wooden base material may be bent. Therefore, it is possible to suppress the impact sound generated from the wooden base material.

  In addition, the load when stepping on the floor material surface is also supported at the tip of each projection, and further compression deformation of the shock absorbing material is limited, so the amount of subsidence of the wooden substrate is limited, and the wooden floor The tread feel of the material is secured.

  Furthermore, each protrusion is embedded in the shock-absorbing material, and no gap (space) is formed between the protrusions, or almost no gap (space) is formed, so that the load repeatedly acts. However, it is difficult for a phenomenon in which the protrusion further enters (is further embedded) toward the shock absorbing material. As a result, the shock absorbing material can ensure a stable compressive deformation with time.

  If the wooden base material can be deformed by bending, the state of the back surface of the wooden base material is not particularly limited, but more preferably, a plurality of concave grooves are formed on the back surface of the wooden base material. Has been.

  According to this aspect, when the load is applied to the wooden floor material, the wooden base material is easily bent by the concave groove formed on the back surface of the wooden base material. In particular, since the buffer layer of the shock absorbing material is compressed and deformed and supported by the protrusions, the wooden base material is more easily bent between the protrusions.

  Further, the shock absorbing material may be made of a foamed material such as foamed resin or foamed rubber as long as it can be restored to its original state after compressive deformation, that is, can be elastically deformed. However, more preferably, the shock absorbing material is made of a nonwoven fabric.

  According to this aspect, when the shock-absorbing material is made of, for example, continuous foamed resin or the like, these are shock-absorbing materials that are integrally molded. Although they affect each other so as not to be deformed, the impact cushioning material is made of a non-woven fabric, so that the non-woven fabric in the vicinity of each protrusion can be independently compressed and deformed. Thereby, the shock absorbing material in the vicinity of the protrusion can be more suitably compressed and deformed.

  Furthermore, as a preferred embodiment, among the plurality of concave grooves, the interval between the adjacent projections is narrower than the interval between the adjacent concave grooves. According to this aspect, since the protruding portion is always located between the concave grooves, excessive bending (deformation) of the portion of the wood-based substrate sandwiched between the concave grooves is suppressed. , Local subduction of the woody base material can be avoided.

  According to the present invention, even if an impact load acts on the surface without impairing the feeling of stepping on the flooring material, the soundproofing property against impact sound can be improved.

The typical exploded perspective view which looked at the wood type flooring concerning the embodiment of the present invention from the surface side. The elements on larger scale of the sheet | seat material shown in FIG. The schematic diagram for demonstrating the structure of the wooden type flooring shown in FIG. The typical disassembled perspective view seen from the back surface side of the wood type flooring which concerns on embodiment of this invention. (A) is a schematic cross-sectional view of a part of the wooden flooring shown in FIG. 1, (b) is a cross-sectional view of a state where an impact load is applied to the wooden flooring shown in (a), and (c). These are sectional drawings in the state where the further impact load acted on the wooden flooring shown in (b). The enlarged view of FIG.5 (c).

Embodiments according to the present invention will be described below with reference to the drawings.
FIG. 1 is a schematic exploded perspective view of a wooden floor material according to an embodiment of the present invention as viewed from the front side, FIG. 2 is a partially enlarged view of the sheet material shown in FIG. 1, and FIG. It is a schematic diagram for demonstrating the structure of the wooden type flooring shown in FIG. FIG. 4 is a schematic exploded perspective view seen from the back side of the wooden flooring according to the embodiment of the present invention, and FIG. 5A is a schematic diagram of a part of the wooden flooring shown in FIG. Sectional drawing, (b) is a sectional view of a state where an impact load is applied to the wooden flooring shown in (a), and (c) is a state where a further impacting load is applied to the wooden flooring shown in (b) FIG. 6 is an enlarged view of FIG. 5 (c).

  As shown in FIGS. 1 and 4, the wooden flooring 1 according to the present embodiment includes a wooden base 2, a pair of impact cushioning materials 3 and 3 laminated on the back surface 2 b of the wooden base 2, and At least a pair of sheet materials 4 and 4 laminated on the back surface 3b of each shock-absorbing material 3 are provided. In the present embodiment, a pair of backing materials 5 and 5 are further laminated on the back surface 4b of each sheet material 4, and the backing material 5 does not necessarily have to be laminated.

1. About the wooden base material 2 The wooden base material 2 is obtained by laminating the surface decorative material 21 and the wooden base material 22 by, for example, sticking or the like, and the surface decorative material 21 does not necessarily have to be laminated. For example, the surface decorative material 21 can include a veneer veneer, a decorative sheet, a saw board, a veneer, or the like. Instead of the surface decorative material 21, cosmetic printing on the surface of the wooden base material 22, for example, UV curable ink jet printing, gravure printing, or the like after an appropriate base treatment may be applied.

  Examples of the wood base material 22 include plywood, particle board (PB), wood fiber board (MDF, insulation board, hard board, etc.), oriented strand board, OSB, LVL, laminated wood, solid wood, and the like. These may be heat-treated or chemical-treated, or may be a wood composite base material in which two or more of these are laminated.

  As shown in FIGS. 1 and 3, a male part 23 and a female part 24 are formed on the periphery of the wooden base material 2 (specifically, the wooden base material 22). When laying the wooden floor material 1 on the floor base surface, a plurality of wooden floor materials 1 are connected by joining the male and female parts 23 and 24 of the adjacent wooden floor materials 1 and 1. be able to. Moreover, the thickness (apparent thickness) from the front surface 2a to the back surface 2b of the woody base material 2 is preferably 6 to 12 mm, more preferably 9 mm.

  Furthermore, in this embodiment, a plurality of concave grooves 25, 25,... Are formed on the back surface 2 b of the woody base material 2. The plurality of concave grooves 25, 25,... Are formed at equal intervals (equal pitch) along the short side direction and the long side direction of the woody base material 2. It is preferable that the pitch of the groove is 3 to 1000 mm, the groove width is 0.3 to 10 mm, and the depth is 1 to 10 mm. Thereby, when a load such as an impact load is applied to the surface of the wooden flooring 1 (that is, the surface 2a of the wooden base 2), the wooden base 2 can be suitably bent.

  In the present embodiment, the plurality of concave grooves 25, 25,... Are formed so that the concave grooves 25 along the longitudinal direction intersect with the concave grooves 25 along the short side direction. As long as it can be expected, a plurality of grooves may be formed along only one of the directions, and a plurality of grooves may be formed along the direction intersecting the short direction and the longitudinal direction. The width, depth, etc. of each groove may be different.

2. About the shock absorbing material 3 The shock absorbing material 3 is compressed so that it can be restored in the thickness direction when a load such as an impact load is applied to the surface of the wooden flooring 1 (that is, the surface 2a of the wooden base material 2). By deforming, this load is absorbed and the impact sound is reduced. Therefore, the shock absorbing material 3 is made of a material or structure that is more easily compressed and deformed than the woody base material 2 and the sheet material 4.

  In the present embodiment, the wooden base material is formed such that the two shock absorbing materials 3 and 3 cover the back surface 2b of the wooden base material 2 and a gap is formed between the two shock absorbing materials 3 and 3. The back surface 2b of the material 2 is laminated on the woody base material 2 via an adhesive, a pressure sensitive adhesive or the like. In the present embodiment, the two shock-absorbing materials 3 and 3 are used. However, the number of shock-absorbing materials is not limited as long as the shock-absorbing material can cover the back surface 2b of the wooden base material 2. Absent.

  The shock-absorbing material 3 is made of, for example, an open-cell foam material or a nonwoven fabric. When the shock absorbing material 3 is a foam material, for example, a synthetic resin foam material or a rubber foam material can be used. Examples of synthetic resin foam materials include polyethylene resin foam materials (for example, polyethylene resin foam materials, polyethylene vinyl alcohol resin foam materials, polyethylene vinyl acetate resin foam materials), polystyrene resin foam materials, urethane foam materials, and these resins. Examples thereof include resin foams containing more than one species. Examples of the rubber foam material include a synthetic rubber foam material and a natural rubber foam material.

  When the impact cushioning material 3 is a non-woven fabric, the raw material or main raw material of the non-woven fabric includes, for example, polyolefin resins such as polyethylene and polypropylene, polyester resins such as polyethylene terephthalate and polybutylene terephthalate, polyamide resins including nylon, Mention may be made of natural fibers such as cotton and wool. The thickness of the shock absorbing material 3 is preferably in the range of 2 to 7 mm.

3. About the sheet material 4 As shown in FIG. 1 and FIG. 2, in this embodiment, two sheet materials 4, 4 corresponding to the shape of the back surface 3 b of each impact buffer material 3 of the two impact buffer materials 3, 3, It is laminated | stacked on each shock-absorbing material 3 via the adhesive agent or the adhesive. In this embodiment, similarly to the two shock absorbing materials 3 and 3, the two sheet materials 4 and 4 are formed on the back surfaces 3b and 3b of the shock absorbing materials 3 and 3 so that a gap is formed between them. It is stuck. By providing such a gap, even if one of the sheet materials 4 is temporarily deformed when the shock absorbing material 3 is compressively deformed, the edge of one sheet material 4 and the other sheet material are sandwiched between the gaps. Since the edge of 4 does not contact, generation | occurrence | production of these contact sounds can be reduced.

  In this embodiment, the two sheet materials 4 and 4 are used. However, the number of the sheet materials 4 and 4 is limited as long as the two sheet materials 4 and 4 cover the back surfaces 3b and 3b of the impact buffer materials 3 and 3, respectively. (It may be 1 or 3 or more) and the contact sound between adjacent sheet materials may not be generated due to the condition of the floor surface to be laid, the selection of the material of the shock absorbing material and the sheet material, etc. For example, it is not always necessary to provide a gap between the sheet materials.

  Further, as shown in FIGS. 1 and 2, the sheet material 4 includes a sheet-like base portion 41 and a plurality of protrusions 42 that protrude toward the shock absorbing material 3 side on the surface of the base portion 41. ing. The protrusions 42 are hemispherical and are formed on the surface of the base part 41 at equal intervals. By making the protrusion 42 hemispherical, the tip of the protrusion 42 is hardly damaged, and the load such as an impact load acting on the wooden flooring 1 can be stabilized and the tip (close to point contact). Status). Thereby, the part of the wooden base material 2 between the projection parts 42 and 42 can be made easy to bend. If such an effect can be expected, in this embodiment, the shape of the protrusion 42 is hemispherical, but for example, a columnar shape, a cone shape, a pyramid shape, a truncated cone shape, a truncated pyramid shape, etc. There may be.

  Moreover, in this embodiment, as a preferable aspect, the space | interval S2 of the adjacent protrusion parts 42 and 42 is narrower than the space | interval S1 of the adjacent groove | channels 25 among several grooved grooves 25. As shown in FIG. Moreover, in this embodiment, the width W2 of the projection part 42 is larger than the width W1 of the ditch | groove 25 of the wood type base material 2 mentioned above as a preferable aspect.

  Further, as shown in FIG. 3 and FIG. 5A, each projection 42 is embedded in the shock absorbing material 3, and between the tip of each projection 42 and the back surface 2 b of the wooden base material 2. The sheet material 4 is laminated on the shock-absorbing material 3 so that a buffer layer 31 made of a part of the shock-absorbing material 3 is formed.

  Here, when the shock absorbing material 3 is a foamed material, for example, the sheet material 4 on which the protruding portion 42 is formed is prepared, and the protruding portion 42 is embedded in the shock absorbing material 3 by heat fusion or the like. Can do. On the other hand, when the shock-absorbing material 3 is a non-woven fabric, for example, the sheet material 4 on which the protrusions 42 are formed is prepared, and either the back surface 3b of the shock-absorbing material 3 that is a non-woven fabric or the front surface 4a of the sheet material 4 The protrusion 42 can be embedded in the shock-absorbing material 3 by applying an adhesive, a pressure-sensitive adhesive, or the like to one of them and applying pressure.

  Examples of the material of the sheet material 4 include polyolefin resins such as polyethylene, polypropylene, and polybutene, polyvinyl resins such as polyvinyl chloride, polystyrene, and polystyrene copolymer resins, and polyester resins such as polyethylene terephthalate, polybutylene terephthalate, polycarbonate, and polyarylate. Examples thereof include polyether resins such as resins, polyacetals, polyphenylene ethers, aromatic polysulfones, and polyether ketones, and polyamide resins such as nylon 6, nylon 6-6, nylon 11, and nylon 12. The thickness of the base part 41 is 0.5 mm as an example, and the height of the protrusion 42 at this time is preferably 1.5 mm, for example. That is, the height of the protruding portion 42 is larger than the thickness of the base portion 41.

4). About the backing material 5 The backing material 5 is adhered to the sheet material 4 via an adhesive or an adhesive so as to cover the back surface 4b of the sheet material 4. As shown in FIG. 1 and FIG. 4, in this embodiment, two backing materials 5, 5 corresponding to the shape of the back surface 4 b of each sheet material 4 of the two sheet materials 4, 4 are the back surfaces of each sheet material 4. 4b is laminated. The material of the backing material 5 may be paper, non-woven fabric, and fabric (felt, etc.), but furthermore, non-woven fabric, fabric (felt, etc.) to which resin is adhered, adhesive foam material, rubber, elastomer, A gel may be used.

5. Lamination Method (Manufacturing Method) When manufacturing the wooden flooring 1 according to the present embodiment, the wooden base material 2, the pair of impact cushioning materials 3, 3, the pair of sheet materials 4, 4, and the pair of The backing materials 5 and 5 can be laid on the floor foundation surface after being sequentially laminated with an adhesive or a pressure-sensitive adhesive. In addition, the backing material 5, the sheet material 4, and the shock absorbing material 3 are laminated in this order with an adhesive or an adhesive on almost the entire floor base surface, and then an appropriate (unit) wood base material 2 is sequentially applied with the adhesive or the adhesive. You may stick with an agent.

  As another method, for example, an impact buffer material, a sheet material, and a backing material are laminated, then the laminated body is cut into a desired shape, and then the laminated body is bonded to the back surface 2b of the wooden base material 2 After laminating with an adhesive or an adhesive, it may be fixed by adhering or adhering to the floor substrate surface, and after adhering or adhering the cut laminate to the floor substrate surface, the wooden substrate is placed on the laminate 2 may be laminated with an adhesive or a pressure-sensitive adhesive.

6). About the effect of the wood type flooring 1 According to this embodiment, as shown in FIG.5 (b), an impact load acts on the wood type flooring 1 (specifically, the surface 2a of the wood type base material 2). In doing so, the buffer layer 31 of the shock absorbing material 3 is compressed and deformed so as to be partially recoverable so as to absorb the shock load. At this time, when the buffer layer 31 reaches the compression limit, the impact load applied to the wooden flooring 1 is supported by the tip portions of the protrusions 42 and 42, so that the compression deformation of the impact buffer material 3 is limited. The In this state, as shown in FIG. 5 (c), when further impact load is applied, the wood base material 2 is separated from the tip portions of the projecting portions 42, 42 that are spaced apart via the shock absorbing material 3. Since it is supported, the wooden substrate 2 can be locally bent.

  In particular, in this embodiment, since the plurality of concave grooves 25, 25 are provided on the back surface 2b of the wooden base material 2, the wooden base material 2 is easily bent when a load is applied to the wooden floor material 1. Therefore, after the buffer layer 31 of the shock absorbing material 3 is compressed and deformed and reaches the compression limit, the woody base material 2 is more easily bent between the protrusions 42 and 42.

  As a result, when an impact load is applied to the surface 2a of the wooden base material 2, the buffer layer 31 of the shock absorbing material 3 is partially compressed and deformed so as to absorb the impact load. Since the material 2 can be bent, the impact sound generated from the woody base material 2 can be suppressed.

  In particular, in the present embodiment, the impact load acting on the wooden floor material 1 is received at the tip of each projection 42 (receives a load in a state close to point contact), so that the compression deformation of the impact buffer 3 is limited. However, the ease of bending of the woody base material 2 due to the impact load can be ensured. As a result, as described above, the sound generated from the woody base material 2 can be suppressed.

  Here, when foaming materials are used for the shock absorbing material 3, these are shock absorbing materials that are integrally formed, and therefore, as shown by the white arrows in FIG. The deformation of the shock absorbing material 3 affects each other so that it is difficult to deform each other. However, if the shock-absorbing material 3 is composed of a nonwoven fabric, the nonwoven fabric in the vicinity of each protrusion 42 can be independently compressed and deformed. Thereby, the shock absorbing material 3 in the vicinity of the protruding portion 42 can be more suitably compressed and deformed.

  Further, as shown in FIG. 5 (c), the shock absorbing material 3 is difficult to compress and deform from the state where the shock absorbing layer 31 of the shock absorbing material 3 is compressed and deformed to the compression limit (the compressive deformation of the shock absorbing material 3 is limited). ) As a result, even when a load is applied when the wooden flooring 1 is stepped on, the sinking amount of the surface 2a of the wooden base 2 with respect to the floor base surface is limited. Stepping comfort can be enhanced.

  In addition, since each protrusion 42 is embedded in the shock-absorbing material 3, no gap (space) is formed between the protrusions 42, 42, or almost no gap (space) is formed, Even if the load repeatedly acts, a phenomenon that the protrusion 42 further enters (further becomes embedded) toward the shock absorbing material 3 is unlikely to occur. As a result, the shock absorbing material 3 can ensure a stable compressive deformation with time.

  Moreover, in this embodiment, since the space | interval S2 of the adjacent projection parts 42 and 42 was narrowed rather than space | interval S1 of adjacent groove | channels 25 and 25 among several grooved grooves 25, the groove 25 , 25 is always located between the protrusions 42. Thereby, the excessive bending (deformation) of the part of the woody base material 2 sandwiched between the concave grooves 25, 25 can be suppressed, and the local sinking of the wooden base material 2 can be avoided. .

  Furthermore, in the present embodiment, the width W2 of the protrusion 42 is made larger than the width W1 of the concave groove 25 of the woody base material 2 described above. Thereby, the projection part 42 does not enter the concave groove 25, and the bending effect of the wooden base material 2 by the concave groove 25 can be expected with certainty.

  Although the embodiment of the present invention has been described in detail above, the specific configuration is not limited to this embodiment, and even if there is a design change within a scope not departing from the gist of the present invention, they are not limited to this embodiment. It is included in the invention.

  For example, in the present embodiment, as a preferred mode, a plurality of concave grooves are provided on the back surface of the wooden base material. However, the wooden base material is bent by an impact load, which can reduce the generation of impact sound. If there is, the concave groove may not be formed.

  Further, in the present embodiment, as a preferable aspect, among the plurality of concave grooves, the interval between the adjacent protrusions is narrower than the interval between the adjacent concave grooves, but the treading feeling of the wooden flooring is improved. If it is good, this relationship need not be satisfied. Furthermore, in the present embodiment, the width of the protruding portion is made larger than the width of the concave groove of the above-described wooden base material, but this relationship is satisfied as long as the wooden base material can be suitably bent. It does not have to be.

  1: wood floor material, 2: wood base material, 3: impact cushioning material, 21: surface decorative material, 23: male solid part, 24: female real part, 25: concave groove, 31: buffer layer, 4: Sheet material, 42: protrusion

Claims (2)

A wood-based flooring comprising at least a wood-based substrate, an impact buffer material laminated on the back surface of the wood-based substrate, and a sheet material laminated on the back surface of the impact buffer material,
The sheet material is formed with a plurality of protrusions protruding toward the shock absorbing material side,
The wooden base material and the shock absorbing material are laminated via an adhesive,
The impact cushioning material is freely compressible and deformable in the thickness direction,
The projections are embedded in the impact cushioning material so as to cover the impact cushioning material in the portion of the sheet material between the projections, and the tip of each projection and the wooden base material Ri Do from a portion of the impact cushioning material between the back, as the buffer layer compressive deformation is freely in the thickness direction are formed, the sheet material is laminated to the impact cushioning material,
A plurality of first grooves extending along one direction and a plurality of second grooves extending along one direction so as to intersect with the first groove are formed on the back surface of the wooden base material. And are formed,
A wooden flooring characterized in that the interval between the adjacent projections is narrower than the interval between adjacent first concave grooves and the interval between adjacent second concave grooves.   The woody flooring material according to claim 1, wherein the shock absorbing material is made of a nonwoven fabric.

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