JP2020180545A - Floor impact sound reduction floor, floor impact sound reduction sheet, and floor impact sound reduction mat - Google Patents

Abstract

To provide a floor impact sound reduction floor, a floor impact sound reduction sheet, and a floor impact sound reduction mat, which can reduce heavy floor impact sound.SOLUTION: The present invention relates to: a floor impact sound reduction floor that has a cushion layer composed of multiple pieces of cushioning materials placed on an existing floor, one or more sheet layers composed of a long sheet, and an adhesion layer for adhering the cushion layer and the sheet layer; a floor impact sound reduction sheet that has a cushion, a sheet, and an adhesive layer for adhering the cushion and the sheet; and a floor impact sound reduction mat that encloses the floor impact sound reduction sheet.SELECTED DRAWING: Figure 1

Description

The present invention relates to a floor impact noise reduction floor capable of reducing floor impact noise, particularly heavy floor impact noise, a floor impact noise reduction sheet, and a floor impact noise reduction mat.

In an apartment house, it is required to suppress the floor impact sound transmitted from the upper floor to the lower floor. The floor impact sound includes a lightweight floor impact sound and a heavy floor impact sound, and the lightweight floor impact sound can be reduced by laying a cushioning finishing material such as a carpet on the floor. On the other hand, heavy floor impact noise is difficult to reduce even if a finishing material is laid on the floor. This is because the heavy floor impact sound is mainly determined by the thickness of the concrete floor. Therefore, in order to suppress heavy floor impact noise, it is important to plan a thick concrete floor when designing the building. Since it is not possible to change the concrete floor in an already constructed apartment building, if it is necessary to improve the heavy floor impact noise after the concrete floor is constructed, a vibration-proof floating floor will be installed on the concrete floor. Although there are methods, anti-vibration floating floors are very expensive and have a large mass, so reinforcement work may be required. Furthermore, it is difficult to carry out construction work to change the floor finishing material in the residential environment where the residents are already living.

As a simple countermeasure against floor impact noise that can be taken even after starting to live, there is a method of laying a commercially available children's play mat on the finished floor (see Patent Document 1). However, although most commercially available play mats are effective against lightweight floor impact noise, they cannot reduce heavy floor impact noise. Mats using foam materials that have the effect of reducing heavy floor impact noise are also commercially available, but mats using such foam materials have a soft surface, so if they receive a large impact load due to human jumping, etc., There is a problem that the sagging occurs and the reduction performance of the heavy floor impact noise is lowered.

By the way, some children with intellectual disabilities and developmental disabilities perform jumping actions on a daily basis, but as they grow up, the excitation force at the time of impact increases. In the case of such a household with children, it is often the case that a mat made of foam material is laid over the entire room, and if the performance deteriorates, it is necessary to replace the room, which imposes a heavy financial burden. Further, most of such foam materials have a surface of red, blue, yellow, light blue, pink or the like, and the design is lower than that of a finished floor such as a flooring material.

JP-A-2002-276135

An object of the present invention is to provide a floor impact noise reduction floor, a floor impact noise reduction sheet, and a floor impact noise reduction mat capable of reducing heavy floor impact noise.

The means for solving the problem of the present invention is as follows.
1. 1. It is characterized by having a cushion layer made of a plurality of cushioning materials laid on an existing floor, one or more sheet layers made of a long sheet, and an adhesive layer for adhering the cushion layer and the sheet layer. Floor impact noise reduction floor.
2. The cushion layer is a laminate of foam sheets. Floor impact noise reduction floor described in.
3. 3. When the tensile strength of the sheet layer is measured using a dumbbell-shaped No. 2 test piece specified in JIS K6251, the smaller value of breaking elongation or yield elongation is 2 mm or more, and the elongation is smaller. 1. The tensile strength at the time of breaking or yielding is 80 N or more. Or 2. Floor impact noise reduction floor described in.
4. A floor impact noise reducing sheet having a cushion, a sheet, and an adhesive layer for adhering the cushion and the sheet.
5.2 or more 4. The floor impact noise reduction sheet according to the above and a cover sheet containing the floor impact noise reduction sheet.
The cover sheet includes two or more bag-shaped portions capable of containing the floor impact noise reducing sheet one by one, and a connecting portion for connecting the bag-shaped portions.
A floor impact noise reduction mat characterized in that it can be folded around the connecting portion.

The floor impact noise reduction floor, floor impact noise reduction sheet, and floor impact noise reduction mat (hereinafter, also simply referred to as simply reduced floor, reduction sheet, and reduction mat, respectively) of the present invention can reduce heavy floor impact noise.
The reduced floor of the present invention can be easily installed in an existing building. Since the reduced floor of the present invention can be installed in a short time, the burden on the resident is small at the time of installation.
The reduced floor of the present invention in which the cushion layer is a laminated body of foam sheets can further reduce heavy floor impact noise. Since the reduced floor of the present invention is hard to settle, the frequency of replacement can be suppressed. When the tensile strength is measured using the dumbbell-shaped No. 2 test piece specified in JIS K6251, the value of the smaller breaking elongation or yield elongation is 2 mm or more, and the breaking or yielding of the smaller elongation. In the reduced floor of the present invention using a sheet layer having a tensile strength of 80 N or more, the sheet layer is not easily deformed and is excellent in repairability after deformation, so that it is very difficult to settle. The reduced floor of the present invention in which the sheet layer includes a printing layer is excellent in design.
Since the reduction sheet and the reduction mat of the present invention are easy to install and accommodate, they can be installed only when and where they are needed and can be accommodated when a visitor or the like.

A partial cross-sectional perspective view of a floor impact noise reducing floor according to the first embodiment of the present invention. A partial cross-sectional perspective view of a floor impact noise reducing floor according to a second embodiment of the present invention. The schematic diagram of the cover sheet which is one Embodiment used for the floor impact sound reduction mat of this invention. The figure which shows the relationship between the tensile force and the displacement amount in Experiment 2. The figure which shows the relationship between the number of times of repeated loading and the height decrease rate in Experiment 3.

"Floor impact noise reduction floor"
The floor impact noise reduction floor of the present invention will be described with reference to embodiments.
FIG. 1 shows a partial cross-sectional perspective view of a floor impact noise reducing floor according to the first embodiment of the present invention.
The floor impact noise reducing floor 1 according to the first embodiment includes a cushion layer 2 made of nine cushioning materials 21 laid on the existing floor, a one-layer sheet layer 3 made of two long sheets 31 and the like. It has an adhesive layer (not shown) that adheres the cushion layer 2 and the sheet layer 3.

-Cushion layer In the reduced floor of the present invention, the cushion layer is a cushion layer in which a plurality of cushioning materials are laid on the existing floor. As for the laid cushion material, adjacent cushion materials can be fixed to each other with an adhesive tape, an adhesive or the like. In the floor impact noise reducing floor 1 of the first embodiment, the cushion material 21 is made of a laminated body of foam sheets.
The material of the cushion material used in the present invention is not particularly limited as long as it absorbs impact and softens floor impact noise, but for example, a foam is preferable. The foam has excellent impact noise reduction performance and repairability against deformation. As the foam, polyethylene foam, polyurethane foam, polystyrene foam and the like can be used, and among these, polyethylene foam is preferable because it has an excellent balance between impact noise reduction performance and strength and is inexpensive.

In the floor impact noise reducing floor of the present invention, the cushion material may be a single layer or a laminated body, but the cushion material is preferably a laminated body. The cushioning material made of a laminated body is excellent in reducing floor impact noise as compared with a single-layer cushioning material having the same total thickness and material. Further, in the cushion material made of the laminated body, the frequency band for reducing the impact sound and the reduction performance can be adjusted by adjusting the elasticity, thickness and the like of each layer.

The thicker the cushion material, the better the effect of reducing the heavy floor impact sound (63 Hz), but the thicker the cushion material, the heavier the weight, the easier it is to settle, and the greater the step between the cushion material and the part where the reduced floor is not laid, making it difficult to live. It is preferable that the thickness is 20 mm or more and 100 mm or less, and more preferably 40 mm or more and 80 mm or less. When the cushioning material is made of a laminated body, the thickness of one layer is preferably 5 mm or more and 10 mm or less, and the thickness of each layer may be the same or different.

-Sheet layer In the reduced floor of the present invention, one or more sheet layers are made of long sheets, and the lowest sheet layer is bonded to a plurality of cushioning materials. By attaching the long sheet to a plurality of cushion materials, it is possible to prevent the cushion materials from shifting. In the reduced floor 1 according to the first embodiment, the long sheet 31 has one layer, the width is 1.5 times that of the cushion material 21, the length is three times that of the cushion material 21, and the cushion material 21 is 4. It has an area equivalent to 5 sheets and is attached to 6 cushion materials 21.
The sheet layer can be used without particularly limiting the material used for the surface material of the floor, and for example, vinyl chloride, polypropylene, ethylene-polyvinyl alcohol copolymer and the like can be used. In addition, these sheets can contain fiber materials such as glass fiber and polymer fiber. Vinyl chloride is most commonly used as the floor surface material. Further, when the sheet layer is the uppermost surface, it is preferable that the sheet layer is printed with wood grain or the like.

Since the seat layer is less deformable than the cushion layer, the amount of deformation of the cushion layer can be reduced by adhering the sheet layer to the surface of the cushion layer. Further, the deformed sheet layer has a self-repairing property of returning to the original shape, but the cushion layer adhered to the sheet layer can also return to the original shape as the shape of the sheet layer is repaired. The floor is hard to settle.

Here, the long sheet used for construction purposes is generally one having a width of about 1.8 m. Since the long sheet is narrower than the size of the room, in order to install the reduced floor of the present invention in a wide area, as shown in FIG. 1, the width direction of the long sheet is increased by adhesive, welding, or the like. You need to join the ends. Since the seams between long sheets are inferior in strength to the seamless parts, the seams may be peeled off or cut when a child jumps on the seams and a large force is applied.

FIG. 2 shows a partial cross-sectional perspective view of the floor impact noise reducing floor according to the second embodiment of the present invention.
The floor impact noise reducing floor 10 according to the second embodiment has a sheet layer 3-2 on the sheet layer 3, and the long sheet 31-2 constituting the sheet layer 3-2 is a long sheet 31. It has the same configuration as the reduced floor 1 according to the first embodiment, except that the floors and the floors are laminated so as to be orthogonal to each other in the longitudinal direction.

As shown in the second embodiment, by laminating two or more sheet layers so that the longitudinal directions of the long sheets constituting each sheet layer are different, it is possible to prevent the seams from being broken. .. Alternatively, even if the longitudinal directions are the same, the seams can be prevented from being broken by laminating them so that the seams do not overlap. When laminating so that the seams do not overlap with each other in the same longitudinal direction, the seams of the upper and lower sheet layers are preferably separated by 5 cm or more in the horizontal direction, and more preferably 10 cm or more. When laminating two or more sheet layers, it is necessary to use a sheet containing a fiber material as at least one of the long sheets constituting the lower sheet layer from the viewpoint of preventing breakage of the seam of the outermost sheet layer. preferable.
In the reduced floor of the present invention, the number of sheet layers may be one or more, but when a plurality of sheet layers are provided, two layers are preferable from the viewpoint of workability. If the width of the long sheet is sufficient so that the reduced floor of the present invention is installed in a corridor, a part of a room, or the like, one sheet layer is sufficient.

In the reduced floor of the present invention, at least one of the sheet layers has a smaller value of breaking elongation or yield elongation when the tensile strength is measured using a dumbbell-shaped No. 2 test piece specified in JIS K6251. It is preferable that the tensile strength at the time of breaking or yielding is 80 N or more, whichever has the smaller elongation. If the smaller value of the breaking elongation or the yield elongation is less than 2 mm, the sheet layer is likely to be torn during deformation or wrinkled without returning while being stretched. Further, if the tensile stress at the time of 2 mm extension is less than 80 N, the repairing force is insufficient and the cushion layer tends to be worn out. The smaller value of the breaking elongation or the yield elongation is more preferably 3 mm or more, and further preferably 5 mm or more. Further, the value of the tensile stress at the time of extension of 2 mm is more preferably 100 N or more, and further preferably 120 N or more.

-Adhesive layer The adhesive layer is for adhering the cushion layer and the sheet layer. When having two or more sheet layers, the layers of each sheet are also adhered. As the adhesive layer, one that can firmly bond the cushion layer and the sheet layer can be used without particular limitation, and a pressure-sensitive adhesive, a heat-sensitive adhesive, an adhesive, a double-sided adhesive tape, etc. should be used. Can be done. At this time, it is preferable that the adhesive surface of the sheet layer has fine irregularities such as embossing because the adhesive force is increased. Further, the adhesive layer may be provided as long as it can uniformly bond the cushion layer and the sheet layer, and may be provided not only on the entire surface but also in a pattern in which dots and lines are combined. When provided in a pattern, the adhesive area is preferably 50% or more, more preferably 60% or more of the entire surface.

Since the floor impact noise reduction floor of the present invention is lightweight in both the cushion material and the seat layer, it is not necessary to reinforce the skeleton structure when laying it. The floor impact noise reduction floor of the present invention can be laid only by laying a plurality of cushioning materials on the existing floor to form a cushion layer, and attaching a long sheet to the cushion layer to form a sheet layer. No special equipment is required for laying, and it can be laid by a small number of people in a short time. When the floor impact noise reduction floor of the present invention is laid in a dwelling after living, the resident does not need to move for a short period of time. Both the cushion material and the long sheet can be carried in manually. The cushion material and long sheet are made of soft material and are not easily scratched even if they hit a wall or furniture during loading.

"Floor impact noise reduction sheet"
The floor impact noise reducing sheet of the present invention has a cushion, a sheet, and an adhesive layer for adhering the cushion to the sheet.
The floor impact noise reduction sheet of the present invention corresponds to the size of one cushion material of the floor impact noise reduction floor of the present invention described above, and each material of the floor impact noise reduction floor is used as a cushion, a sheet, and an adhesive layer. The equivalent of can be used.

"Floor impact noise reduction mat"
By including two or more of the above-mentioned floor impact noise reduction sheets in a cover sheet provided with a bag-shaped portion capable of containing the floor impact noise reduction sheet one by one and a connecting portion connecting the bag-shaped portions, the floor impact is included. It can be a sound reduction mat.
FIG. 3 shows a schematic view of a cover sheet according to an embodiment. The cover sheet 4 shown in FIG. 2 includes three bag-shaped portions 41 and two connecting portions 42 for connecting the bag-shaped portions 41, and can be folded around the connecting portion 42 as an axis. Since the cover sheet 4 shown in FIG. 2 is provided with connecting portions 42 so as to alternate vertically, it can be folded like a folding screen. In the present invention, the number of bag-shaped portions of the cover sheet is not particularly limited, but it is preferably 2 or more and 4 or less from the viewpoint of handleability.

Experiment 1: Heavy floor impact noise reduction experiment "Example 1"
A commercially available sheet 1 (made of vinyl chloride: 2 mm thick) was adhered to a laminated polyethylene mat (40 mm thick) made of a laminated polyethylene foam having a thickness of 5 mm with an acrylic adhesive to obtain a test piece.
"Example 2"
Specimens were obtained in the same manner as in Example 1 except that the thickness of the laminated polyethylene mat was 50 mm.
"Example 3"
Specimens were obtained in the same manner as in Example 1 except that the thickness of the laminated polyethylene mat was 80 mm.

"Comparative Example 1"
Only the laminated polyethylene mat of Example 1 was used as a test body.
"Comparative Example 2"
Only a single polyethylene mat with a thickness of 40 mm that was not laminated was used as a test piece.

"Comparative Example 3"
A test body was obtained in the same manner as in Example 1 except that the sheet 1 was a commercially available sheet 2 (made of vinyl chloride: thickness 0.8 mm).
"Comparative Example 4"
A test body was obtained in the same manner as in Example 1 except that the sheet 1 was a commercially available sheet 3 (made of vinyl chloride: thickness 2.3 mm).

Weight floor impact sound level under conditions where each test piece is laid and not laid on a concrete floor is measured by JIS A1418-2: 2000 using an impact source (tire) having impact force characteristics (1). However, the amount of reduction in heavy floor impact noise was determined from these differences. In addition, the change in the shape of the test piece before and after the test was visually confirmed. Table 1 shows the results of 50 Hz to 80 Hz, which are important for heavy floor impact noise, among the results for each 1/3 octave band.

-Results From Examples 1 to 3, it was confirmed that thickening the cushion layer improves the performance of reducing heavy floor impact noise. In addition, in Examples 1 to 3, no change was observed in the shape of the test body before and after the test.
From Comparative Examples 1 and 2, it was confirmed that the cushion layer having a laminated body was superior in the performance of reducing heavy floor impact noise. In Comparative Examples 1 and 2, the test body (cushion layer only) after the test had a dent.
Example 1 and Comparative Example 3 had almost the same heavy floor impact noise reduction performance. However, in the test body of Comparative Example 3, deformation was observed in the sheet layer after the test.
In the test body of Comparative Example 4, the sheet layer was torn only by hitting it once with the impact source, and the heavy floor impact sound could not be measured.

Experiment 2: Tensile test The tensile strength of the sheets 1 to 3 used in Experiment 1 and another commercially available sheet 4 (made of vinyl chloride: thickness 2 mm) was measured. The measurement is performed by using a table-top precision universal testing machine (manufactured by Shimadzu Corporation, device name Autograph AGS-X 5kN) to cut out a dumbbell-shaped No. 2 sheet specified in JIS K6251 at a tensile speed of 100 mm /. It was pulled in min and the tensile strength against elongation was measured. The measurement results are shown in Table 2 and FIG.

-Results The sheet 2 has a large displacement with respect to the tensile force. Therefore, it is considered that the deformation occurred in Experiment 1.
The sheet 3 had a yield elongation of 1.2 mm and a tensile strength at the time of yield of 68.1 N. It is probable that the sheet 3 was torn in Experiment 1 because the yield elongation was small.
The sheet 4 is stronger than the sheet 1 and can be expected to be as hard to deform as the sheet 1.

Experiment 3: Settlement test "Comparative Example 5"
Only the laminated polyethylene mat of Example 2 was used as a test body.
"Comparative Example 6"
A test piece was obtained in the same manner as in Example 2 except that the laminated polyethylene mat and the sheet 1 were not adhered.

Repeated compression residual strain was determined according to JIS K6400-4. Specifically, a force of 500 N is repeatedly applied to a test piece having a plane size of 500 mm × 500 mm by a pressurizer having a diameter of 100 mm 60 times per minute, and the height (thickness) at the loading point is set with respect to that before loading. The degree of decrease was measured. Further, the test bodies obtained in Example 2 and Comparative Example 3 were also measured in the same manner. The results are shown in FIG.

-Results It was confirmed that the height of Example 2 of the present invention is less likely to decrease and the height is less likely to settle even when a repeated load is applied, as compared with Comparative Examples 3, 5 and 6. In particular, from Example 2 and Comparative Example 6, it was confirmed that by adhering the seat layer and the cushion layer, the height is less likely to decrease, that is, it is less likely to settle.

1,10 Floor impact noise reduction Floor 2 Cushion layer 21 Cushion material 3,3-2 Seat layer 31,31-2 Long sheet

4 Cover sheet 41 Bag-shaped part 42 Connecting part

Claims (5)

It is characterized by having a cushion layer made of a plurality of cushioning materials laid on an existing floor, one or more sheet layers made of a long sheet, and an adhesive layer for adhering the cushion layer and the sheet layer. Floor impact noise reduction floor. The floor impact noise reducing floor according to claim 1, wherein the cushion layer is a laminated body of foam sheets. When the tensile strength of the sheet layer is measured using a dumbbell-shaped No. 2 test piece specified in JIS K6251, the smaller value of breaking elongation or yield elongation is 2 mm or more, and the elongation is smaller. The floor impact noise reducing floor according to claim 1 or 2, wherein the tensile strength at the time of breaking or yielding is 80 N or more. A floor impact noise reducing sheet having a cushion, a sheet, and an adhesive layer for adhering the cushion and the sheet. It has two or more floor impact sound reduction sheets according to claim 4 and a cover sheet containing the floor impact sound reduction sheet.
The cover sheet includes two or more bag-shaped portions capable of containing the floor impact noise reducing sheet one by one, and a connecting portion for connecting the bag-shaped portions.
A floor impact noise reduction mat characterized in that it can be folded around the connecting portion.