JP2023151828A - Soundproof floor material for reforming - Google Patents

Abstract

To propose a soundproof floor material that is a thin plate-like hard material having an uneven surface and is mainly stuck onto a flooring material in reforming.SOLUTION: A soundproof floor material for reforming comprises: a floor material body 2 that is a hard material having an uneven surface; and a skin sheet 3 stuck to an upper surface of the floor material body. In the floor material body, concave bands 5 having different widths are formed in parallel to each other at predetermined intervals on its front side 4, and concave bands 8 having different widths are formed in parallel to each other so as to cross the front side concave bands 5 on its rear side 7. Thus, inside the floor material body 2, a number of concave bands 5, 8 of air layers into which impact sounds from above enter are arranged in a crosswise manner, and impact sounds can be absorbed.SELECTED DRAWING: Figure 2

Description

The present invention relates to a soundproof flooring material that is a thin plate-like hard material having an uneven surface and is mainly attached to flooring materials during renovation.

In houses such as condominiums, flooring materials are usually laid on the floors of Western-style rooms, and painted plywood, MDF, particle board, resin boards, or laminated decorative sheet materials are used as the flooring materials, and even foamed polyurethane and other materials are used. A soft layer may be laminated. Flooring materials are required to have high impact resistance due to their multilayer structure, as well as sound insulation and sound absorption properties for floor impact noise.

For example, JP 2018-54833, JP 2020-535330, and JP 2021-95737 disclose a porous material layer, a fiber layer, a glass fiber layer, a PE foam layer, This is a multi-layered flooring material consisting of a thermoplastic resin layer, a soft layer, a core layer, a PVC layer, a primer layer, a plywood layer, etc. Due to this multilayer structure, the total thickness is 30 to 100 mm in JP 2018-54833, 8 to 12 mm in JP 2021-95737, and relatively thick PE foam layer in JP 2020-535330. Even excluding the primer layer, the thickness reaches approximately 4 mm or more.

JP 2018-54833 Publication Japanese Patent Application Publication No. 2020-535330 JP2021-95737A Japanese Patent Application Publication No. 2014-211064

The flooring materials disclosed in Japanese Patent Application Publication No. 2018-54833 etc. are thick to improve sound insulation, and although they can be installed in newly built homes, they are not suitable for pasting on top of flooring materials for home renovations. It's too thick to be of any use. On the other hand, Japanese Patent Application Publication No. 2014-211064 relates to a flooring material for renovation, and sets the total thickness of the flooring material to 5 to 10 mm, keeping the total thickness of the flooring material considerably thin.

In JP 2014-211064, even if the total thickness of the flooring material is 5 to 10 mm, the thickness of the soft layer is 2 to 4 mm and the thickness of the hard layer is 3 to 7 mm, and the surface decorative sheet and If there are three adhesive layers and referring to the examples, it can be estimated that the total thickness actually reaches around 7 mm. As a result, even though the flooring material disclosed in Japanese Patent Application Laid-open No. 2014-211064 can be attached to some flooring materials for renovation purposes, it is often too thick to be installed. I can't.

If the total thickness of the flooring material is around 4 mm, it can be attached on top of the flooring material as a flooring material for renovation. Currently, sheet-like polyurethane foam, PVC, or thin plywood are mainly used as flooring materials for renovations, and although these have some impact resistance and load capacity, they do not have sound insulation or sound absorption properties. It has little effect on sound insulation and sound absorption, and may reduce sound insulation and sound absorption properties.

The present invention was proposed in order to improve the above-mentioned problems with current flooring materials for renovations, and is a soundproofing soundproofing material for renovations that can effectively absorb impact noise from above even if it has a thin plate-like structure. The purpose is to provide flooring materials. Another object of the present invention is to provide a soundproof flooring material that has a thin plate-like structure with a thickness of less than 4 mm, so it does not feel uncomfortable even when attached to existing flooring materials, and is lightweight and easy to transport. Another object of the present invention is to provide a soundproof flooring material that is relatively inexpensive because the flooring material body is made of a single hard material having an uneven surface.

The soundproof flooring material according to the present invention includes a flooring material body made of a hard material having an uneven surface, and a skin sheet attached to the upper surface of the flooring material body. By forming concave bands having different widths in parallel at predetermined intervals on the front side of the main body of the flooring material, a large number of surface bands of a predetermined width are present in parallel at intervals. By forming concave bands having different widths in parallel on the back side so as to intersect with the concave bands on the front side, a large number of back side band parts having a predetermined width are present in parallel at intervals. In the soundproof flooring material of the present invention, impact sound can be absorbed by having a large number of concave bands of air layers arranged in a crosswise manner inside the flooring material body into which impact sound from above enters.

In the soundproof flooring material according to the present invention, concave bands having different widths are formed parallel to each other at a predetermined interval on the front side of the flooring main body, so that the surface band portions having a predetermined width are arranged at a predetermined interval. A large number of shallow grooves may exist in parallel, and shallow grooves having different widths may be provided on the plane of each surface band. On the back side of this floor material main body, by forming parallel concave bands having different widths so as to intersect with the concave bands on the front side, a large number of back side band parts of a predetermined width exist in parallel at intervals, and each Shallow grooves with different widths may be provided in the plane of the back band. This soundproof flooring material can absorb impact sound by having a large number of concave bands and shallow grooves of the air layer intersectingly arranged in parallel inside the flooring material body into which impact sound from above enters.

In the soundproof flooring material according to the present invention, the flooring material body is made of a thin plate material such as hard plastic, metal, or wood with a thickness of 2.5 to 3.5 mm, and the skin sheet has a thickness of 1 mm or less. and preferable. Further, the width of the concave bands on the front and back sides of the flooring body is preferably 8 to 15 mm, and the width of the shallow grooves is preferably 3 to 6 mm, and the widths of the concave bands and shallow grooves are different in the lateral direction sequentially or randomly. . Furthermore, in the flooring main body, the parallel front side bands and the parallel back side bands are arranged orthogonally, and each set of four rectangular plane single layer parts is almost evenly distributed over the entire surface. Even if the main body is pressed from above, it will not partially bend.

When the soundproof flooring material according to the present invention is applied to an existing flooring material for renovation, it can effectively absorb impact noise from above even if it has a thin plate-like structure. In the soundproof flooring material of the present invention, the flooring material body has shallow uneven surfaces on the front and back surfaces, and when the skin sheet is adhered onto the flooring material body and then attached to the flooring material, a sealed concave band with both ends open is formed. By arranging them in a crisscross pattern, many air layers with different volumes are formed, and the presence of these air layers causes impact sound to be reflected and refracted, making it possible to absorb noise in a wide range of wavelengths. In addition, by providing shallow grooves with different widths on the planes of each surface band on the front and back surfaces of the flooring body, more sealed concave bands with both ends open are arranged in a crosswise manner, making noise in a wide range of wavelengths more effective. can be absorbed.

The soundproof flooring material according to the present invention has a thin plate-like structure with a total thickness of about 4 mm, so even if it is pasted on existing flooring materials, it will not feel uncomfortable after installation, and is suitable for renovation of condominiums and the like. The soundproof flooring material of the present invention has a thin plate-like structure, so it is lightweight, and when a large number of sheets are stacked, it is easy to transport and store.

In the soundproof flooring material according to the present invention, the main body of the flooring material can be manufactured continuously by plastic injection molding or the like, and continuous manufacturing is possible even when the length and width reach around 1000 m. Since this flooring body is a thin unit made of hard plastic, metal, or wood, the amount of material used to manufacture it is small, so it is inexpensive. Therefore, the soundproof flooring of the present invention can be manufactured much more quickly and at a lower cost than conventional multilayer flooring.

1 is a partial side view showing an example of a soundproof flooring material according to the present invention. FIG. 2 is a partial perspective view showing a floor material body used in the soundproof floor material of FIG. 1. FIG. FIG. 2 is a partial plan view showing a floor material body used in the soundproof floor material of FIG. 1. FIG. 1 is a vibration graph of excitation transmitted sound showing the soundproof flooring material of the present invention together with conventional flooring materials for renovation. 1 is a vibration graph of fall impact sound showing the soundproof flooring material of the present invention together with conventional flooring materials for renovation.

As shown in FIGS. 1 and 2, the soundproof flooring material 1 according to the present invention consists of a flooring material body 2 made of a hard material having an uneven surface, and a skin sheet 3 attached to the upper surface of the flooring material body. . On the flat flooring main body 2, concave bands 5 having different widths are formed in parallel at a predetermined interval on the front side 4 thereof, so that a large number of surface band parts 6 of a predetermined width are formed in parallel at a predetermined interval. exist. Further, as shown in FIG. 3, on the back side 7 of the flooring main body 2, another concave band 8 having a different width is formed in parallel to intersect with the concave band 5 on the front side. A large number of sections 10 are arranged in parallel at intervals.

The soundproof flooring material 1 having a thickness of around 4 mm is suitable as a flooring material for renovation. The floor material body 2 is made of ABS resin, acrylic resin, hard thermoplastic plastic such as polycarbonate or high-density polyethylene resin, or hard thermoplastic resin such as phenolic resin or unsaturated polyester resin, with a thickness of 2.5 to 3.5 mm. Hardenable plastics, metal plates such as aluminum or stainless steel plates, thin wood sheets, etc. can be used. The plastic of the floor material body 2 may be filled with glass fiber, talc, wood powder, etc. to make it highly hard. Further, the skin sheet 3 is a sheet having a thickness of 1 mm or less, and may be provided with a pattern that imparts design to the surface of the sheet, a surface protective layer that imparts scratch resistance to the surface, and the like. The material for the skin sheet 3 is determined depending on the environment in which the soundproof flooring material 1 is installed, and flame-retardant plastic or metal plates are used in high-temperature usage environments, and hard polyolefins are used if cost is important.

Concave bands 5 or 8 having different widths are formed in parallel at a predetermined interval on the front side 4 and back side 7 of the flooring main body 2, so that the interval between each two concave bands can be adjusted to form an individual surface band. 6 or the back band portion 10. Unlike the widths of the concave bands 5 and 8, which increase and decrease individually, the widths of the front side band part 6 and the back side band part 10 may be the same or may be different individually, and the widths are 5 to 5. It is sufficient if the distance is kept within a range of about 15 mm.

Each concave band 5, 8 typically has an arbitrary cross-sectional shape, such as a rectangular shape, a shallow V-shape, or a curved shape, with a depth of about 1 mm or less. The width of each concave band 5, 8 is within the range of 8 to 15 mm, and the width varies in the lateral direction sequentially or randomly. The concave bands 5 and 8 are arranged so that there are approximately the same number of concave bands 5 and 8 on the entire surface of the soundproof flooring material 1, each having a width within the range of 8 to 15 mm and differing in millimeter units. If the width of the concave bands 5, 8 is less than 8 mm, it will be difficult to absorb high frequency noise, and if it exceeds 15 mm, even low frequency noise will not be absorbed.

As shown in FIG. 3, in the floor material body 2, the front side concave band 5 and the back side concave band 8 are arranged to intersect with each other, so that the parallel front side band part 6 and the parallel back side band part 10 intersect. Although the intersecting angle of the front side band part 6 and the back side band part 10 is arbitrary, it is preferable to arrange them perpendicularly to facilitate the production of the flooring main body 2.

The planes of the front side band part 6 and the back side band part 10 may be flat, or they may have round holes, square holes, short and long grooves, cross grooves, S-shaped meandering grooves, etc. Shallow grooves 12 of different widths, 14 is preferable because the sound absorption effect increases to some extent, and furthermore, it is easy to process the floor material body 2. The shallow grooves 12, 14 usually have an arbitrary cross-sectional shape, such as a rectangle or a V-shape, with a depth of about 1 mm or less, and are preferably located at the lateral center of the band portions 6, 10 as shown. The width of each of the shallow grooves 12, 14 is within the range of 3 to 6 mm, and they are arranged so as to have a single width or to be dispersed as appropriate over the entire surface of the soundproof flooring material 1 within the range of 3 to 6 mm. If the width of the shallow grooves 12, 14 is less than 3 mm, no complementary sound absorption effect will be produced, and if the width exceeds 6 mm, almost no sound absorption effect will be produced.

Since there is no space in the height direction of the floor material body 2 in the area where the front side band part 6 and the back side band part 10 intersect, except for the shallow grooves 12 and 14, this part is referred to as a single layer part 16. . As is clear from FIG. 3, the single layer portions 16 have a rectangular plane, and are distributed almost evenly over the entire surface of the floor material body 2 in groups of four. The floor material main body 2 has high load resistance due to the presence of a set of four single layer parts 16 distributed over the entire surface, and does not partially bend even if it is strongly pressed from above.

In the soundproof flooring material 1, the flooring material body 2 has shallow uneven surfaces on the front and back surfaces as shown, and the skin sheet 3 is adhered onto the flooring material body. When the soundproof flooring material 1 is pasted on a known flooring material 18 (FIG. 1), many air layers of different volumes are formed by the sealing concave bands 5 and 8 on the front and back sides being arranged in a crosswise manner with both ends open. The presence of these air layers causes impact sound to be reflected and refracted, and noise in a wide range of wavelengths can be absorbed. In addition, by providing shallow grooves with different widths on the planes of each surface band on the front and back surfaces of this flooring body, more sealed concave bands with both ends open are arranged in a crosswise manner, which further reduces noise over a wide range of wavelengths. Can be absorbed effectively.

Regarding the soundproof flooring material 1, the amount of reduction in the floor impact sound level of lightweight floor impact sound (LL) was measured at the Building Research Institute, and this measurement method is a simple measurement method using a tapping machine according to JIS-A1418. The soundproof floor material 1 used in the measurement is made of acrylic resin and has the same shape as in Example 1. The soundproof flooring material 1 was placed on a flooring material laid on a concrete floor, and compared with a wooden top floor and PVC tiles placed in the same manner, and also compared with the flooring material alone. The measurement results are shown in Table 1.

Since the soundproof flooring material 1 is aimed at being a flooring material for renovation, the flooring material is placed on top of the flooring material without being removed, as in actual use. With conventional flooring materials such as wooden clad floors and PVC tiles, measurements of lightweight floor impact sound (LL) are obtained in which the floor impact sound is almost unchanged when attached to the flooring material. Regarding the floor impact sound level reduction amounts in Table 1, the LL values of all flooring materials are approximately 50 at the octave band center frequency, which is almost the same. As for the soundproof flooring material 1, since it was simply placed on the flooring material without being adhered to it, it vibrated due to the impact during the measurement, and the measured value deteriorated by several dB.

Next, regarding the soundproof flooring material 1, the amount of floor impact sound level reduction of heavy floor impact sound (LH) was measured at the Building Research Institute, and this measurement method is a simple measurement method using tires according to JISA1418. The soundproof floor material 1 used in the measurement is made of acrylic resin and has the same shape as in Example 1. The soundproof flooring material 1 is placed on a flooring material laid on a concrete floor, and compared with a similarly placed wooden top floor or PVC tile, and further compared with the flooring material alone. The measurement results are shown in Table 2.

The soundproof flooring material 1 is simply placed on top of the flooring material without removing it, as in actual use. With conventional flooring materials such as wooden clad floors and PVC tiles, measurements of heavy floor impact sound (LH) are obtained in which the floor impact sound is almost the same when attached to the flooring material. According to the floor impact sound level reduction amount shown in Table 2, the LH value of the soundproof flooring material 1 is improved from about 60 to 55 at the octave band center frequency. Since the soundproof flooring material 1 was simply placed on the flooring material without being adhered to it, it vibrated due to the impact during measurement, deteriorating the measured value by several dB.

The soundproof flooring material 1 has an overall thickness of approximately 4 mm, so it is unnoticeable even when pasted on top of existing flooring materials, and it is easy to adhere to the flooring material, causing less discomfort after installation, making it suitable for condominiums and detached houses. It is suitable as a product for renovation such as. Even though the soundproof flooring material 1 has a thin plate-like structure with a total thickness of around 4 mm, it can effectively absorb impact sound from above.Because it has a thin plate-like structure, it is lightweight, and it is easy to transport and store when stacked in large numbers. is also easy.

The soundproof flooring material 1 can be manufactured continuously with the main flooring material body 2 by plastic injection molding or cutting the front and back sides of thin plate materials, and continuous manufacturing is possible even when the length and width reach around 1000 m. Since this flooring body is a thin unit made of hard plastic, metal, or wood, the amount of material used to manufacture it is small, so it is inexpensive.

Next, the present invention will be explained based on examples, but the present invention is not limited to the examples. In the flat soundproof flooring material 1, an ABS resin sheet with a thickness of 3 mm is used as the material for the flooring material body 2. In FIG. 1, the skin sheet 3 is a plastic sheet with a thickness of 1 mm, a wood pattern is applied to the surface of the sheet to give it a design, and the sheet is adhered onto the floor material body 2.

The flooring main body 2 has a large number of parallel surface band parts 6 by forming a large number of concave bands 5 in parallel at predetermined intervals on the front side 4 thereof. As shown in FIG. 3, a large number of parallel concave bands 8 are formed on the back side 7 of the flooring main body 2, so that a large number of back side band parts 10 are provided in parallel. The concave strip 5 on the front side 4 and the concave strip 8 on the back side 7 intersect at right angles.

The width of each front band 6 and back band 10 is 10 mm, and the concave bands 5 and 8 have a rectangular cross-sectional shape with a depth of about 1 mm. 2 and 3, the width of the concave band 5a is 8 mm, the width of the concave band 5b is 9 mm, the width of the concave band 5c is 10 mm, the width of the concave band 5d is 11 mm, the width of the concave band 5e is 12 mm, and the width of the concave band 5e is 12 mm. After 15mm, return to 8mm. The width of the concave band 8a is 8 mm, the width of the concave band 8b is 9 mm, the width of the concave band 8c is 10 mm, the width of the concave band 8d is 11 mm, the width of the concave band 8e is 12 mm, and after the width of 15 mm, the width is returned to 8 mm. .

The widths of the flat surface band portion 6 and the back surface band portion 10 are all 10 mm. Shallow grooves 12 and 14 extending in the vertical direction are provided on the upper surfaces of the front side band part 6 and the back side band part 10 at the centers in the lateral direction. Both shallow grooves 12 and 14 have a width of 5 mm and a depth of 1 mm. The shallow grooves 12 and 14 are arranged with a single width over the entire surface of the soundproof flooring material 1.

The ability of the soundproof flooring material 1 of Example 1 to absorb noise from above is shown by measuring the transmitted transmitted sound, which is light impact sound. In this experiment, a flooring material was laid on a concrete floor (floor slab) with a thickness of 120 mm on the second floor, and the soundproof flooring material 1 was adhered to the upper surface of the flooring material. Next, a tapping machine was placed on the soundproof flooring material 1, and the noise at each frequency was measured with a low-frequency sound meter installed on the first floor.

For comparison, noise was also reduced when known renovation materials (polyurethane foam sheet and hard surface sheet) were laid and glued on top of the flooring material on a concrete floor, and when only the flooring material was used without laying anything. It was measured. The results of these measurements are shown in FIG.

The soundproof flooring material 1 of Example 1 has a lower noise level at 100 to 315 Hz and 800 Hz in terms of excitation transmitted sound, and the known reform material has a lower noise level at 1000 to 2500 Hzd than when a known renovation material is installed. . Judging by the overall noise level, the soundproof flooring material 1 of Example 1 has a noise level about 3.5 dB (55.77-52.47 dB) lower than that of known renovation materials. Further, the soundproof flooring material 1 of Example 1 has a noise level lower by approximately 0.3 dB (53.01-52.47 dB) than the case of only flooring material.

As a result, in the case of known renovation materials, the noise level of the excited transmitted sound is slightly higher than that of the flooring material alone, whereas the soundproof flooring material 1 of Example 1 has a noise level that is almost equal to or slightly lower than that of the flooring material alone. . Therefore, it can be determined that the soundproof flooring material 1 of Example 1 has a certain degree of impact transmission sound reduction effect, since the noise level is lower than that of the known renovation material.

The soundproof flooring material of Example 2 uses the same material as that of Example 1 and has almost the same structure. Shallow grooves 12 and 14 extending in the vertical direction are provided on the upper surfaces of the front side band part 6 and the back side band part 10 at the centers in the lateral direction. Both shallow grooves 12 and 14 have a width of 3 mm and a depth of 1 mm. The shallow grooves 12 and 14 are arranged with a single width over the entire surface of the soundproof flooring material 1.

The ability of the soundproof flooring material of Example 2 to absorb noise from above is shown by measuring the sound transmitted by falling, which is weight impact sound. In this experiment, a flooring material was laid on a 120 mm thick concrete floor (floor slab) on the second floor, and a soundproof flooring material was adhered to the top surface of the flooring material. Next, a light tire was dropped from 1 m above the soundproof flooring, and the noise at each frequency was measured using a low-frequency sound meter installed on the first floor.

For comparison, we will compare the cases where known renovation materials (polyurethane foam sheet and hard surface sheet) are laid and glued on top of the flooring material on the concrete floor, the case where only the flooring material is used without laying anything, and the case where the flooring material is placed on the flooring material on the concrete floor. The noise was measured using only the floor slab, excluding the timber. The results of these measurements are shown in FIG.

The soundproof flooring material of Example 2 has a lower noise level at 100 to 2000 Hz and 800 Hz in terms of falling transmitted sound than when a known renovation material is installed. Judging by the overall noise level, the soundproof flooring material of Example 2 has a noise level about 2 dB (67.14-65.12 dB) lower than that of known renovation materials. In addition, the soundproof flooring material of Example 2 has a noise level of about 2.2 dB (67.29-65.12 dB) compared to the case of only the slab, and about 1.1 dB (66.19-65.12 dB) compared to the case of only the flooring material. The level is low.

As a result, the soundproof flooring material of Example 2 has a lower noise level in all frequency ranges than the flooring material alone, and the overall noise level is about 1 dB lower. Therefore, it can be determined that the soundproof flooring material of Example 2 has a certain degree of impact transmission sound reduction effect, since the noise level is lower than that of the known renovation material.

1 Soundproof floor material 2 Floor material main body 3 Outer skin sheet 5 Concave band on the front side 6 Surface band section 8 Concave band on the back side 10 Back side band section
12 Shallow groove on the front side 14 Concave band on the back side

Claims (5)

The flooring main body is made of a hard material having an uneven surface, and a skin sheet is attached to the upper surface of the flooring main body. By forming them parallel to each other, a large number of surface bands of a predetermined width are present in parallel at intervals, and on the back side, concave bands having different widths are formed in parallel by intersecting the concave bands on the front side. As a result, a large number of back bands of a predetermined width exist in parallel at intervals, and a large number of concave bands of air layers that allow impact sounds from above to enter inside the flooring main body are arranged in a crosswise manner, thereby suppressing impact noise. Soundproof flooring for renovation that can absorb sound. The flooring body includes a hard material having an uneven surface and a skin sheet attached to the upper surface of the flooring body, and the flooring body is provided with concave bands having different widths at predetermined intervals on the front side thereof. By forming the surface strips in parallel with each other, a large number of surface strips of a predetermined width exist in parallel at intervals, and shallow grooves with different widths are provided on the plane of each surface strip, and on the back side, there are By forming parallel concave bands having different widths by intersecting the concave bands, a large number of back side bands of a predetermined width are present in parallel at intervals, and shallow grooves of different widths are formed in the plane of each back side band. A soundproof flooring material for remodeling that can absorb impact sound by providing a large number of concave bands and shallow grooves of the air layer arranged crosswise in the inside of the flooring material body, into which impact sound from above enters. 2. The soundproof flooring material according to claim 1, wherein the flooring material body is made of a thin sheet material of hard plastic, metal, or wood with a thickness of 2.5 to 3.5 mm, and the skin sheet has a thickness of 1 mm or less. The widths of the concave bands on the front and back sides of the flooring body are within the range of 8 to 15 mm, and the widths of the shallow grooves are within the range of 3 to 6 mm, and the widths of the concave bands and the shallow grooves vary laterally sequentially or randomly. The soundproof flooring material according to claim 1. In the flooring body, the parallel front side bands and the parallel back side bands are arranged orthogonally, and a set of four rectangular flat single layer parts are almost evenly distributed over the entire surface, so that the flooring body is The soundproof flooring material according to claim 1, which does not partially bend even when pressed from above.

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