Floor underlayment

Abstract

To improve walking feeling and work stability in a floor substrate material arranged between a finishing material such as a flooring material and a base such as a concrete slab.SOLUTION: A floor substrate material is configured to be disposed between a finishing material and a base and to be disposed alongside another underfloor material. The floor substrate material comprises a floor base material and a support member. The floor base material is formed in a shape of a rectangular plate having a first long side, a second long side facing the first long side, and a first short side and a second short side respectively connecting ends of the first long side and the second long side on an outer periphery. Only four support members are provided on a lower surface of the floor base material and configured to support the floor base material. The only four support members are arranged such that each of first, second, third and fourth regions includes at least a portion of the support members.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to an underfloor material that is placed between a base such as a concrete slab and a finish material such as flooring. [Background technology]

[0002] For example, Patent Document 1 below discloses an underfloor material whose underside is supported by support legs arranged at multiple points along the periphery. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 03-197758 Summary of the Invention [Problem to be solved by the invention]

[0004] However, with the technology of Patent Document 1, the central portion of the underfloor material is prone to bending, which may impair the feeling of walking, which indicates the comfort of walking when a user walks on the floor, during installation, etc. Furthermore, when workers place the underfloor material on a base such as a slab, it is also necessary to improve the ease of the work, that is, the work stability.

[0005] One aspect of the present disclosure is to improve the walking comfort and working stability in a floor underlayment material that is placed between a finishing material such as flooring material and a base such as a concrete slab. [Means for solving the problem]

[0006] One aspect of the present disclosure is an underfloor material configured to be placed between a finish material and a base and to be arranged alongside other underfloor materials. The underfloor material includes a floor base material and a support member. The floor substrate is formed into a rectangular plate shape having a first long side, a second long side opposite the first long side, and a first short side and a second short side connecting the ends of the first long side and the second long side, respectively. Here, the rectangle is not limited to a rectangle in the strict sense, and it does not have to be a rectangle as long as it produces the same effect as above.

[0007] The four support members are provided on the underside of the floor substrate and are configured to support the floor substrate, and are arranged such that at least a portion of the support members is included in each of the first, second, third, and fourth regions.

[0008] With this configuration, the first to fourth regions are located near the periphery of the floor base material, ensuring work stability. Also, because the first to fourth regions are located closer to each other than in a configuration where they are located at the four corners, deflection of the floor base material can be suppressed, improving the walking feel.

[0009] In one embodiment of the present disclosure, the support member arranged in the second region may be referred to as the second support portion, and the support member arranged in the third region may be referred to as the third support portion, and the second support portion may be arranged closer to the first short side than H3 in the second region. The third support portion may be arranged closer to the second short side than H3 in the third region.

[0010] With this configuration, the second and third support parts are spaced apart by H3 so as not to overlap with H3, which prevents the second and third support parts from getting too close in the direction along the long side of the floor base material and optimizes the distance between the second and third support parts, resulting in an underfloor material that provides a better walking feel.

[0011] In one embodiment of the present disclosure, the support member arranged in the first region is referred to as the first support section, and the support member arranged in the fourth region is referred to as the fourth support section. The first support section may be arranged closer to the second long side than the third support section. The fourth support section may be arranged closer to the first long side than the second support section.

[0012] This configuration prevents the distance between the first support part and the fourth support part from becoming too long, and optimizes the distance between the first support part and the fourth support part, resulting in an underfloor material that provides a better walking feel.

[0013] In one aspect of the present disclosure, the support member may be constructed from a rubber-based material. With this configuration, the rubber material that makes up the support member damps vibrations, so that transmission of vibrations between the floor substrate and the base can be suppressed.

[0014] In one embodiment of the present disclosure, the contact area of ​​the support member with the floor substrate may be configured to be 1% or less. With this configuration, the cross-sectional area of ​​the support member through which vibrations are transmitted is extremely small, at less than 1% of the area of ​​the underside of the floor substrate, making it difficult for vibrations to be transmitted, thereby suppressing vibration transmission between the floor substrate and the base.

[0015] In one embodiment of the present disclosure, the support member may be configured to have an Asker A hardness HA of 40≦HA≦60 at 23°C. With this configuration, a support member that combines shape restoring properties and vibration absorption properties can be obtained. [Brief explanation of the drawings]

[0016] [Figure 1] FIG. [Figure 2] FIG. 2 is a six-view diagram of the underfloor material according to the embodiment. [Figure 3] FIG. 3 is a cross-sectional view taken along the line III-III in FIG. 2. [Figure 4] FIG. 10 is a rear view of the floor substrate showing the arrangement of the support members. [Figure 5] FIG. 2 is a plan view showing an example of the arrangement of a plurality of underfloor materials. [Figure 6] FIG. 10 is a rear view of the floor substrate showing an example of the placement of support members in the test. [Figure 7]FIG. 10 is a six-view diagram of a floor underlayment according to another embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0017] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. [1. Embodiment] [1-1.Configuration] The underfloor material 1 shown in the exploded perspective view of Fig. 1 is placed between a finishing material 90 and a base 94, for example, as shown in Fig. 3, and is used by being placed alongside other underfloor materials 1, as shown in Fig. 5. The finishing material 90 is a component placed on the surface of a floor in any building, such as an office, a home, or an exercise facility. The finishing material 90 can be, for example, wood-based flooring, cork board, tile, stone, tatami, carpet, resin sheet material, rubber sheet material, etc.

[0018] The base 94 is, for example, a part of the skeleton of a building, and is a portion that has a horizontal surface on which the underfloor material 1 is placed. The base 94 can be, for example, a concrete slab. 1, the underfloor material 1 includes a floor substrate 10 and four support members 30. The underfloor material 1 may also include sound-absorbing members 20. The support members 30 and the sound-absorbing members 20 are bonded to the floor substrate 10 with an adhesive, for example.

[0019] The floor substrate 10 is made by processing a wood-based material such as particle board into a rectangular shape. The hardness of the particle board is, for example, 18 to 24 N / mm 2 A material having a bending strength of 1000 kJ / cm2 (JIS A5908) can be used.

[0020] The floor base material 10 is configured so that the ratio of the lengths of the short side and long side of the rectangle is approximately 1:2, and as an example, the length of the short side is set to approximately 455 mm and the length of the long side is set to approximately 910 mm.

[0021] In this disclosure, the term "rectangle" does not necessarily mean a rectangle in the strict sense, and may refer to a shape other than a rectangle as long as it provides the same effect as described above. For example, the term "rectangle" includes shapes with portions cut out, shapes with holes inside the four sides, and shapes in which some sides are not parallel to the other sides but still appear roughly rectangular. Furthermore, in addition to particle board, structural plywood, laminated lumber, etc. can also be used for the floor substrate 10.

[0022] Each of the four support members 30 is provided on the underside of the floor substrate 10 to support the floor substrate 10. The underside refers to the surface of the floor substrate 10 that is vertically downward when the underfloor material 1 is in use. The support members 30 are made of a rubber-based material. For example, a combination of styrene-butadiene copolymer rubber and natural rubber can be used as the material for the support members 30. The support members 30 may be made of a single type of rubber-based material, or a combination of multiple types of rubber-based materials. The rubber-based material may also contain reinforcing materials such as fillers and additives such as antioxidants.

[0023] The underfloor material 1 of the present disclosure is characterized by the arrangement of four support members 30. In the present disclosure, the number of support members 30 is four because if there are too many support members 30, the total cross-sectional area of ​​the support members 30 increases, making it easier for sound and vibration to be transmitted through the support members 30. Also, if there are too few support members 30, the work stability decreases when arranging the underfloor materials 1 side by side, and the feeling of walking on them also becomes worse.

[0024] The working stability and walking feel will be described later. The cross-sectional area of ​​the support member 30 referred to here refers to the cross-sectional area of ​​the support member 30 in a cross section parallel to the horizontal plane. The four support members 30 are configured so that the contact area of ​​the support members 30 is 1% or less of the total area of ​​the underside of the floor substrate 10. Here, the contact area of ​​the support members 30 refers to the contact area between the support members 30 and the floor substrate 10. However, it may also refer to the contact area between the support members 30 and the base 94.

[0025] In this embodiment, the support member 30 is formed in a cylindrical shape, and therefore the cross-sectional area of ​​the support member 30 corresponds to the contact area of ​​the support member 30. In this embodiment, the support member 30 is formed in a cylindrical shape with a radius of 15 mm, for example, and in this case, the ratio of the contact area of ​​the support member 30 to the total area of ​​the underside of the floor substrate 10 is approximately 0.68%. The contact area of ​​the support member 30 can be made small enough to withstand the load during use.

[0026] Furthermore, the underfloor material 1 of the present disclosure is able to achieve both work stability and a comfortable walking feel by devising an arrangement of the four support members 30. Furthermore, at the work site where the underfloor material 1 is placed, the shape is adjusted by cutting the underfloor material 1 according to the size of the floor, but the underfloor material 1 of the present disclosure is devised such that three or more support members 30 tend to remain on the underfloor material 1 after cutting.

[0027] The support member 30 is configured so that its Asker A hardness HA is 40≦HA≦60 at 23° C. If the support member 30 is configured within this hardness range, it is believed that vibration of the floor base material 10 can be effectively suppressed.

[0028] The specific arrangement of the support members 30 in the underfloor material 1 will be described below. As shown in FIG. 4, the long sides of the outer periphery of the floor substrate 10 are referred to as a first long side 111 and a second long side 112. The second long side 112 is the side opposite the first long side 111. The short sides are referred to as a first short side 121 and a second short side 122. The first short side 121 and the second short side 122 are sides connecting the ends of the first long side 111 and the second long side 112, respectively. In other words, the floor substrate 10 is a rectangular plate-shaped member having a first long side 111, a second long side 112, a first short side 121, and a second short side 122.

[0029] In the floor base material 10, the five imaginary lines that divide the distance from the first long side 111 to the second long side 112 into six equal parts are designated W1, W2, W3, W4, and W5, in order from the first long side 111 side. Additionally, the five imaginary lines that divide the distance from the first short side 121 to the second short side 122 into six equal parts are designated H1, H2, H3, H4, and H5, in order from the first short side 121 side.

[0030] Furthermore, on the underside of the floor substrate 10, the area surrounded by the first short side 121, W1, H1, and W2 is defined as the first region 101, and the area surrounded by H2, W5, H3, and the second long side 112 is defined as the second region 102. In addition, the area surrounded by H3, the first long side 111, H4, and W1 is defined as the third region 103, and the area surrounded by H5, W4, the second short side 122, and W5 is defined as the fourth region 104.

[0031] The four support members 30 are arranged so that at least a portion of each support member 30 is included in each of the first region 101, the second region 102, the third region 103, and the fourth region 104. In other words, the four support members 30 may be arranged so that a portion of each extends beyond each of the regions 101 to 104. However, each support member 30 is arranged so that it does not extend beyond the edges of the floor substrate 10, i.e., the first long side 111, the second long side 112, the first short side 121, and the second short side 122.

[0032] 4, the support member 30 arranged in the first region 101 is referred to as the first support section 31, and the support member 30 arranged in the second region 102 is referred to as the second support section 32. Furthermore, the support member 30 arranged in the third region 103 is referred to as the third support section 33, and the support member 30 arranged in the fourth region 104 is referred to as the fourth support section 34.

[0033] The first support portion 31 is disposed closer to the second long side 112 than the third support portion 33. In other words, the first support portion 31 is disposed so that the distance from the first support portion 31 to the second long side 112 is shorter than the distance from the third support portion 33 to the second long side 112.

[0034] The second support portion 32 is disposed closer to the first short side 121 than the imaginary line H3 in the second region 102. In other words, the second support portion 32 is disposed on the first short side 121 side, avoiding the imaginary line H3, so that at least a portion of the second support portion 32 does not overlap with the imaginary line H3.

[0035] The third support portion 33 is disposed closer to the second short side 122 than the imaginary line H3 in the third region 103. In other words, the third support portion 33 is disposed on the second short side 122 side, avoiding the imaginary line H3, so that at least a portion of the third support portion 33 does not overlap with the imaginary line H3.

[0036] The fourth support portion 34 is disposed closer to the first long side 111 than the second support portion 32. In other words, the fourth support portion 34 is disposed so that the distance from the fourth support portion 34 to the first long side 111 is shorter than the distance from the second support portion 32 to the first long side 111.

[0037] In other words, the four support members 30 are arranged so as to be asymmetric. Specifically, the four support members 30 are arranged so as not to be line-symmetric. In particular, the four support members 30 are arranged so as not to be line-symmetric with respect to the imaginary line H3 that divides the first long side 111 and the second long side 112 at the center. Furthermore, the four support members 30 are arranged so as not to be line-symmetric with respect to the imaginary line W3 that divides the first short side 121 and the second short side 122 at the center.

[0038] Furthermore, in this embodiment, the four support members 30 are arranged so that the distances to adjacent other support members 30 are approximately equal. In other words, the second support portion 32 is arranged so that the distance to the first support portion 31, the distance to the third support portion 33, and the distance to the fourth support portion 34 are approximately equal. Furthermore, the third support portion 33 is arranged so that the distance to the first support portion 31, the distance to the second support portion 32, and the distance to the fourth support portion 34 are approximately equal. Note that the distances to adjacent other support members 30 do not need to be equal for the four support members 30, and they may be arranged in any manner.

[0039] The sound-absorbing member 20 is a member with a sound-absorbing function that is arranged to make it difficult for sound and vibrations generated in the floor substrate 10, the finishing material 90, or the space above the finishing material 90 to be transmitted to the base 94. The sound-absorbing member 20 also has the function of making it difficult for sound and vibrations transmitted from below the base 94 to be transmitted to the floor substrate 10 or the finishing material 90.

[0040] The sound absorbing member 20 is made of a fiber material such as glass wool, polyester fiber, etc. The sound absorbing member 20 is formed in the shape of a rectangle having roughly the same size as the floor base material 10 with a part cut out.

[0041] Specifically, as shown in Figures 1, 2 and 3, the sound-absorbing member 20 is configured by cutting out the four corners of a rectangle and four areas where the support members 30 are to be placed. As shown in Figure 5, connecting members 50 are placed at the four corners of the underfloor material 1, and the cutout areas at the four corners of the sound-absorbing member 20 are configured to match the shape of the outer periphery of the connecting members 50.

[0042] In other words, the sound-absorbing member 20 is arranged so as to cover almost the entire underside of the floor substrate 10 except for the areas where the support member 30 and the connecting member 50 are arranged. This configuration is intended to enhance the sound-absorbing effect.

[0043] The underfloor materials 1 are connected to other underfloor materials 1 using connecting members 50. The connecting members 50 are made of wood-based materials. For example, particle board, structural plywood, laminated lumber, etc. can be used for the connecting members 50. The corners of the four underfloor materials 1 are placed on the connecting members 50.

[0044] With the four corners of the underfloor material 1 placed on the connecting members 50, screws or the like are driven into the underfloor material 1 to connect and fix it to the connecting members 50. Then, as shown in Figure 3, a basing material 92 and a finishing material 90 are placed in this order on the underfloor material 1 to finish the floor. Note that the basing material 92 can be made of plywood, veneer, particle board, gypsum board, or the like.

[0045] [1-2. Test] Next, a test was conducted on the underfloor material 1 described above. In this test, the underfloor materials 1 were arranged vertically and horizontally as shown in Fig. 5, and the work stability during arrangement was evaluated in a state before the underfloor materials 1 were fixed to the connecting members 50. In addition, with the underfloor materials 1 and the basing material 92 and the finishing material 90 arranged on top of the underfloor materials 1, the walking stability was evaluated when an evaluator walked on multiple underfloor materials 1. The underfloor materials 1 were arranged in a row of four vertically and two horizontally, with the short sides 121, 122 aligned vertically.

[0046] The evaluation yielded the following results:

[0047] [Table 1]

[0048] In Comparative Examples A, B, and C, as shown in FIG. 6, four support members 30 are arranged in the same manner as in the underfloor material 1 of the embodiment, but the arrangement thereof is set differently. In Comparative Example A, the support members 30 are arranged at the four corners of the floor substrate 10. In Comparative Example B, the arrangement is similar to that of the support members 30 in the embodiment of this embodiment, but the support members 30 are closer to the short sides 121 and 122 than the support members 30 in the embodiment of this embodiment. In Comparative Example C, the support members 30 are closer to the center than in Comparative Example A.

[0049] The results of this test are based on relative evaluations made by the evaluators as follows:

[0050] [Table 2]

[0051] Here, work stability refers to the simplicity or ease of arranging the underfloor materials 1 side by side; for example, if the support members 30 are properly positioned and the underfloor materials 1 can be arranged with minimal tilt, wobble, or flapping, the work stability is evaluated as high. On the other hand, if force is required to keep the underfloor material 1 horizontal when placing it (if it tilts), the work stability is evaluated as low. Furthermore, if the position of the underfloor material 1 shifts significantly when walking on it (large wobble), or if the edge on the opposite side of the stepped area rises significantly (large flapping), the work stability is also evaluated as low.

[0052] Furthermore, the walking feel refers to the comfort of walking when a typical user walks on the floor (for example, on the underfloor material 1, the slat material 92, and the finishing material 90). For example, when a user walks on the floor, if there is a large difference in the amount of flexure between parts, the walking feel is evaluated as poor, and if there is a small difference in the amount of flexure, the walking feel is evaluated as good.

[0053] According to the test, the configuration of the present embodiment provided better results in terms of work stability and walking feel than the comparative examples A, B, and C. [1-3.Effects] According to the embodiment described above in detail, the following effects are achieved.

[0054] (1a) One aspect of the present disclosure is an underfloor material 1 that is arranged between a finishing material 90 and a base 94 and is configured to be arranged alongside other underfloor materials 1. The underfloor material 1 includes a floor substrate 10 and a support member 30.

[0055] The floor substrate 10 is formed in the shape of a rectangular plate having a first long side 111, a second long side 112, and a first short side 121 and a second short side 122 connecting the ends of the first long side 111 and the second long side 112, respectively, around the outer periphery of the underside on which the support member 30 is placed.

[0056] The four support members 30 are provided on the underside of the floor substrate 10 and are configured to support the floor substrate 10. The four support members 30 are arranged so that at least a portion of each support member 30 is included in each of the first region 101, the second region 102, the third region 103, and the fourth region 104.

[0057] This configuration ensures work stability by setting the first to fourth regions 101-104 near the periphery of the floor substrate 10. Furthermore, because the first to fourth regions 101-104 are set closer to each other than in a configuration where they are set at the four corners, deflection of the floor substrate 10 can be suppressed, improving the walking feel.

[0058] (1b) In one embodiment of the present disclosure, the second support portion 32 is disposed closer to the first short side 121 than the imaginary line H3 in the second region 102. The third support portion 33 is disposed closer to the second short side 122 than the imaginary line H3 in the third region 103.

[0059] With this configuration, the second support portion 32 and the third support portion 33 are positioned so as not to overlap the imaginary line H3, which prevents the second support portion 32 and the third support portion 33 from getting too close in the direction along the long side of the floor substrate 10, optimizing the distance between the second support portion 32 and the third support portion 33. As a result, the amount of deflection of the floor substrate 10 can be optimized. This results in an underfloor material 1 that provides a better walking feel.

[0060] (1c) In one embodiment of the present disclosure, the first support portion 31 is disposed closer to the second long side 112 than the third support portion 33. The fourth support portion 34 is disposed closer to the first long side 111 than the second support portion 32.

[0061] This configuration prevents the distance between the first support portion 31 and the fourth support portion 34 from becoming too long, and optimizes the distance between the first support portion 31 and the fourth support portion 34. This allows for the underfloor material 1 to provide a better walking feel.

[0062] (1d) In one embodiment of the present disclosure, the support member 30 is made of a rubber-based material. With this configuration, the rubber material that makes up the support member 30 damps vibrations, so that transmission of vibrations between the floor substrate 10 and the base 94 can be suppressed.

[0063] (1e) In one embodiment of the present disclosure, the contact area ratio of the support member 30 to the floor substrate 10 is configured to be 1% or less. With this configuration, the cross-sectional area of ​​the support member 30 through which vibrations are transmitted is extremely small, at less than 1% of the area of ​​the underside of the floor substrate 10, making it difficult for vibrations to be transmitted, thereby suppressing vibration transmission between the floor substrate 10 and the base 94.

[0064] (1f) In one embodiment of the present disclosure, the support member 30 is configured to have an Asker A hardness HA of 40≦HA≦60 at 23°C. This configuration allows the support member 30 to have both shape restoring properties and vibration absorbing properties. If HA is less than 40, the elastic force will be small and it will be difficult to ensure shape restoring properties. If HA is more than 60, it will be too hard and it will be difficult to suppress vibrations and noise during use.

[0065] 2. Other Embodiments Although the embodiments of the present disclosure have been described above, the present disclosure is not limited to the above-described embodiments and can be implemented in various modified forms.

[0066] (2a) In the above embodiment, the sound-absorbing member 20 is provided, but the sound-absorbing member 20 is not an essential component. For example, the underfloor material 2 shown in Fig. 7 may be configured without the sound-absorbing member 20. The underfloor material 2 includes a floor substrate 10 and four support members 30, similar to the underfloor material 1 of the embodiment. Even with this configuration, the same effect as in (1a) above can be obtained.

[0067] (2b) In the above embodiment, the Asker A hardness HA of the support member 30 is set to 40≦HA≦60. However, the Asker A hardness HA of the support member 30 may be smaller than 40 or larger than 60.

[0068] (2c) In the above embodiment, the contact area ratio of the support member 30 to the floor base material 10 is configured to be 1% or less, but the contact area ratio of the support member 30 to the floor base material 10 may be greater than 1%.

[0069] (2d) In the above embodiment, the support member 30 is made of a rubber-based material, but it may be made of a resin-based material, a wood-based material, a fiber-based material, or the like.

[0070] (2e) In the above embodiment, the first support portion 31 is disposed closer to the second long side 112 than the third support portion 33, but this configuration is not limited thereto. For example, the first support portion 31 may be disposed so that the distance from the first support portion 31 to the second long side 112 is equal to the distance from the third support portion 33 to the second long side 112. Furthermore, the third support portion 33 may be disposed closer to the second long side 112 than the first support portion 31.

[0071] (2f) In the above embodiment, the fourth support portion 34 is disposed closer to the first long side 111 than the second support portion 32, but this is not limited to the configuration. For example, the fourth support portion 34 may be disposed so that the distance from the second support portion 32 to the first long side 111 is equal to the distance from the fourth support portion 34 to the first long side 111, or the second support portion 32 may be disposed closer to the first long side 111 than the fourth support portion 34.

[0072] (2g) In the above embodiment, the second support portion 32 is disposed closer to the first short side 121 than the imaginary line H3 in the second region 102, and the third support portion 33 is disposed closer to the second short side 122 than the imaginary line H3 in the third region 103, but this configuration is not limiting. For example, the second support portion 32 may be disposed on the imaginary line H3, and the third support portion 33 may be disposed on the imaginary line H3.

[0073] (2h) In the above embodiment, a configuration in which the underfloor material 1 is connected and supported by the connecting members 50 is exemplified, but this configuration is not limited to this. The underfloor material 1 does not need to be connected and supported by the connecting members 50, and in this case, notches at the four corners of the sound-absorbing member 20 are not necessary.

[0074] (2i) In the above embodiment, the support member 30 is cylindrical in shape, but it may be a polygonal prism such as a square prism or a hexagonal prism.

[0075] (2j) In the above embodiment, the upper end of the floor substrate 10 shown in Figure 4 is illustrated as the first long side 111, the lower end as the second long side 112, the left end as the first short side 121, and the right end as the second short side 122, but this configuration is not limited to this. The lower end of the floor substrate 10 may be the first long side 111 and the upper end as the second long side 112, or the right end may be the first short side 121 and the left end as the second short side 122.

[0076] (2k) In the above embodiment, the support member 30 and the sound-absorbing member 20 are bonded to the floor substrate 10 with an adhesive, but this is not the only possible configuration. The support member 30 and the sound-absorbing member 20 may be bonded to the floor substrate 10 with adhesive tape or a pressure-sensitive adhesive, or may be joined with fasteners such as screws, nails, or clips (for example, fasteners that are mechanically placed using a tool).

[0077] (2l) Multiple functions of one component in the above embodiments may be realized by multiple components, or one function of one component may be realized by multiple components. Also, multiple functions of multiple components may be realized by one component, or one function realized by multiple components may be realized by one component. Also, part of the configuration of the above embodiments may be omitted. Also, at least part of the configuration of the above embodiments may be added to or substituted for the configuration of another of the above embodiments.

[0078] (2m) In addition to the above-described underfloor material 1, the present disclosure can also be realized in various forms, such as a system that includes the underfloor material 1 as a component. [Explanation of symbols]

[0079] 1, 2... underfloor material, 10... floor base material, 20... sound-absorbing material, 30... support member, 31... first support part, 32... second support part, 33... third support part, 34... fourth support part, 50... connecting member, 90... finishing material, 92... backing material, 94... base, 101... first region, 102... second region, 103... third region, 104... fourth region, 111... first long side, 112... second long side, 121... first short side, 122... second short side.

Claims

1. A floor underlayment configured to be placed between a finishing material and a base and to be placed alongside other floor underlayments, a floor substrate formed in the shape of a rectangular plate having a first long side, a second long side opposite the first long side, and a first short side and a second short side connecting the ends of the first long side and the second long side, respectively, on the periphery; and four support members provided on the underside of the floor substrate and configured to support the floor substrate; Five imaginary lines that divide the distance from the first long side to the second long side into six equal parts are designated W1, W2, W3, W4, and W5 in order from the first long side, and five imaginary lines that divide the distance from the first short side to the second short side into six equal parts are designated H1, H2, H3, H4, and H5 in order from the first short side, Furthermore, on the underside of the floor substrate, the area surrounded by the first short side, W1, H1, and W2 is defined as a first area, the area surrounded by H2, W5, H3, and the second long side is defined as a second area, the area surrounded by H3, the first long side, H4, and W1 is defined as a third area, and the area surrounded by H5, W4, the second short side, and W5 is defined as a fourth area. the four support members are arranged such that at least a portion of the support member is included in each of the first region, the second region, the third region, and the fourth region; A floor underlayment constructed as follows.

2. The floor underlayment according to claim 1, The support member disposed in the second region is referred to as a second support portion, and the support member disposed in the third region is referred to as a third support portion, the second support portion is disposed closer to the first short side than the H3 in the second region, the third support portion is disposed closer to the second short side than the H3 in the third region; A floor underlayment constructed as follows.

3. The floor underlayment material according to claim 1 or claim 2, the support member arranged in the first region is referred to as a first support portion, the support member arranged in the second region is referred to as a second support portion, the support member arranged in the third region is referred to as a third support portion, and the support member arranged in the fourth region is referred to as a fourth support portion, the first support portion is disposed closer to the second long side than the third support portion, The fourth support portion is disposed closer to the first long side than the second support portion. A floor underlayment constructed as follows.

4. The floor underlayment material according to any one of claims 1 to 3, The support member is made of a rubber-based material.

5. The floor underlayment material according to any one of claims 1 to 4, The contact area of ​​the support member with respect to the floor substrate is 1% or less. A floor underlayment constructed as follows.

6. The floor underlayment material according to any one of claims 1 to 5, The Asker A hardness HA of the support member is 40≦HA≦60 at 23°C. A floor underlayment constructed as follows.

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