Buffer spring member for reducing floor impact noise, buffer assembly layer including the same, and architectural floor structure

Abstract

Disclosed therein are a cushioning spring member for reducing inter-floor noise, a cushioning assembly layer including the same, and a floor structure for construction. The disclosed cushioning spring member for reducing inter-floor noise is a cushioning spring member applied to a floor structure for construction and may include a lower plate portion, an upper plate portion spaced apart from the lower plate portion, a plurality of unit cells arranged to form a plurality of layers between the lower plate portion and the upper plate portion and having a honeycomb cell structure, and a vertical column portion extending in a vertical direction while interconnecting two unit cells adjacent vertically among the plurality of unit cells and extending to protrude into the interior of each of the two unit cells.

Description

Technology Field

[0001] The present invention relates to members and structures applied to buildings, and more specifically, to cushioning members and floor structures for buildings applied to buildings. Background Technology

[0002] Noise and vibration transmitted from upper floors to lower floors in multi-unit structures such as buildings or apartments are being raised as significant social issues, and the most major problem among these is floor impact noise, which is transmitted from the impact on the floor slabs of the upper floors through the ceilings of the lower floors.

[0003] The aforementioned floor impact sound can be classified into light impact sound, which is generated by a relatively light and hard impact, and, conversely, heavy impact sound, which is generated by a relatively heavy and soft impact. That is, it can be classified into light impact sound, which consists of high-frequency sounds generated by the falling of small objects, and heavy impact sound, which consists of low-frequency sounds generated by the falling of heavy objects, adult walking, or child running.

[0004] As a measure to reduce inter-floor noise, sound-absorbing or cushioning materials are recently installed on concrete slabs during construction to attenuate impact noise. However, existing sound-absorbing materials are structured to primarily prevent the transmission of light impact noise, which presents a problem as they are not suitable for Korea, where heavy impact noise is frequently generated. Furthermore, existing cushioning materials have limitations in reducing heavy impact noise because they have a high potential for amplification in the 63 Hz band, which determines the blocking performance of heavy impact noise. Although it is necessary to apply low-elasticity structures (materials) to effectively reduce heavy impact noise generated in the ondol layer, existing cushioning structures may find it difficult to satisfy these requirements and fail to effectively block heavy impact noise. The problem to be solved

[0005] The technical problem that the present invention aims to solve is to provide a buffer spring member capable of effectively reducing inter-floor noise in a building by applying a structure that mimics a natural ecological structure.

[0006] In addition, the technical problem that the present invention aims to solve is to provide a buffer assembly layer comprising the aforementioned buffer spring member.

[0007] In addition, the technical problem that the present invention aims to solve is to provide a floor structure for construction comprising the aforementioned buffer assembly layer.

[0008] The problems that the present invention aims to solve are not limited to those mentioned above, and other unmentioned problems will be clearly understood by those skilled in the art from the description below. means of solving the problem

[0009] According to embodiments of the present invention for achieving the above-mentioned objectives, a cushioning spring member applied to a floor structure for construction is provided, comprising: a lower plate portion; an upper plate portion spaced apart from the lower plate portion; a plurality of unit cells arranged to form a plurality of layers between the lower plate portion and the upper plate portion and having a honeycomb cell structure; and a vertical column portion extending in a vertical direction while interconnecting two unit cells adjacent vertically among the plurality of unit cells and extending to protrude into the interior of each of the two unit cells.

[0010] The above two vertically adjacent unit cells may include a first unit cell and a second unit cell spaced apart from the first unit cell, and the vertical column may be extended to interconnect the central part of the first unit cell and the central part of the second unit cell, and may include a first protrusion protruding into the interior of the first unit cell and a second protrusion protruding into the interior of the second unit cell.

[0011] The first protrusion may be spaced apart from the lower surface inside the first unit cell, and the second protrusion may be spaced apart from the upper surface inside the second unit cell.

[0012] The plurality of unit cells may further include a third unit cell laterally joined to the first unit cell and a fourth unit cell laterally joined to the second unit cell, and the third and fourth unit cells may be arranged adjacently vertically, and the third and fourth unit cells may be provided with a vertical column identical to the vertical column.

[0013] According to other embodiments of the present invention, a cushioning assembly layer applied to a floor structure for construction is provided, comprising: a cushioning material layer having a plurality of insertion grooves formed on at least the lower side; and a plurality of cushioning spring members disposed by being partially inserted into each of the plurality of insertion grooves; wherein the cushioning spring members include a lower plate portion; an upper plate portion spaced apart from the lower plate portion; a plurality of unit cells having a honeycomb cell structure disposed to form a plurality of layers between the lower plate portion and the upper plate portion; and a vertical column portion extending in a vertical direction while interconnecting two unit cells adjacent vertically among the plurality of unit cells, and extending to protrude into the interior of each of the two unit cells.

[0014] The above two vertically adjacent unit cells may include a first unit cell and a second unit cell spaced apart from the first unit cell, and the vertical column may be extended to interconnect the central part of the first unit cell and the central part of the second unit cell, and may include a first protrusion protruding into the interior of the first unit cell and a second protrusion protruding into the interior of the second unit cell.

[0015] The first protrusion may be spaced apart from the lower surface inside the first unit cell, and the second protrusion may be spaced apart from the upper surface inside the second unit cell.

[0016] The plurality of unit cells may further include a third unit cell laterally joined to the first unit cell and a fourth unit cell laterally joined to the second unit cell, and the third and fourth unit cells may be arranged adjacently vertically, and the third and fourth unit cells may be provided with a vertical column identical to the vertical column.

[0017] The two vertically adjacent unit cells can form a unit cell group, and the unit cell group can be arranged in multiple numbers, and the vertical column part can be provided for each of the multiple unit cell groups.

[0018] The above vertical column may have a vertical plate structure.

[0019] The plurality of unit cells may include a first unit cell adjacent to the lower plate and a second unit cell adjacent to the upper plate, and the first unit cell may be in contact with the lower plate or a first connecting part connecting the first unit cell and the lower plate may be further provided, and the second unit cell may be in contact with the upper plate or a second connecting part connecting the second unit cell and the upper plate may be further provided.

[0020] The above buffer layer may include a polymer-based material.

[0021] The above cushioning spring member may include a plastic material.

[0022] According to other embodiments of the present invention, a building floor structure is provided, comprising: a buffer assembly layer disposed on the base slab layer; and a concrete layer disposed on the buffer assembly layer. Effects of the invention

[0023] According to embodiments of the present invention, a cushioning spring member capable of effectively reducing inter-floor noise in a building and a cushioning assembly layer including the same can be realized by applying a structure that mimics a natural ecological structure. According to one embodiment, when a low-elasticity cushioning spring member is combined and applied to a cushioning material layer, the dynamic elastic modulus ( dynamic stiffness ) is approximately 4 MN / m 3 By lowering it to a lower level, noise transmitted by running or walking, which is a major cause of inter-floor noise, can be effectively reduced. In addition, according to one embodiment, by applying a vertical column member to increase the load resistance performance of the low-elasticity cushioning spring member, durability against various types of loads occurring during the use of the cushioning assembly layer can be improved, and the cushioning effect and inter-floor noise suppression effect can be further enhanced.

[0024] In addition, according to embodiments of the present invention, by applying the above-described cushioning assembly layer, a building floor structure having an excellent inter-floor noise reduction effect, including blocking / reducing heavy impact sound, can be realized.

[0025] However, the effects of the present invention are not limited to the above effects and can be extended in various ways without departing from the technical concept and scope of the present invention. Brief explanation of the drawing

[0026] FIG. 1 is a cross-sectional view showing a cushioning assembly layer that can be applied to a floor structure for construction, according to one embodiment of the present invention. FIG. 2 is a cross-sectional view showing a cushioning spring member that can be applied to a cushioning assembly layer according to one embodiment of the present invention. FIG. 3 is a perspective view illustrating an exemplary cushioning spring member that can be applied to a cushioning assembly layer according to one embodiment of the present invention. FIG. 4 is a cross-sectional view showing a cushioning spring member that can be applied to a cushioning assembly layer, according to another embodiment of the present invention. FIG. 5 is a cross-sectional view showing a cushioning spring member according to the first comparative example. FIG. 6 is a cross-sectional view showing a cushioning spring member according to the second comparative example. FIG. 7 is a photographic image showing a cushioning spring member according to an embodiment and comparative example of the present invention and a cushioning assembly layer applied thereto to a cushioning material layer. FIG. 8 is a photographic image showing a method of testing physical properties for a cushioning spring member and a cushioning assembly layer including the same, according to the embodiments and comparative examples described in FIG. 7. FIGS. 9 to 14 are drawings according to embodiments of the present invention, showing various dimensions and arrangements of insertion grooves that a cushioning layer to which a cushioning spring member can be applied may have. FIG. 15 is a plan view showing a cushioning layer to which a cushioning spring member can be applied, according to an embodiment of the present invention. FIG. 16 is a photographic image showing a cushioning spring member according to an embodiment of the present invention. FIG. 17 is a cross-sectional view showing a floor structure for construction including a cushioning assembly layer according to one embodiment of the present invention. Specific details for implementing the invention

[0027] Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings.

[0028] The embodiments of the present invention described below are provided to more clearly explain the present invention to those skilled in the art, and the scope of the present invention is not limited by the following embodiments, and the following embodiments may be modified in various other forms.

[0029] The terms used herein are for describing specific embodiments and are not intended to limit the invention. Terms used herein in the singular form may include plural forms unless the context clearly indicates otherwise. Additionally, the terms “comprise” and / or “comprising” used herein specify the presence of the mentioned features, steps, numbers, actions, components, elements, and / or groups thereof, and do not exclude the presence or addition of one or more other features, steps, numbers, actions, components, elements, and / or groups thereof. Furthermore, the term “connected” used herein means not only that components are directly connected, but also includes the concept of indirectly connecting components through the interposition of additional components between them.

[0030] Furthermore, when a component is described in this specification as being located "on" another component, this includes not only cases where a component is in contact with another component, but also cases where another component exists between the two components. The term "and / or" as used in this specification includes any one of the listed items and all combinations of one or more thereof. Additionally, terms of degree such as "about" and "substantially" as used in this specification are used to mean a range of numerical values ​​or degrees or approximate values, taking into account inherent manufacturing and material tolerances, and are used to prevent an infringer from unfairly exploiting the disclosures in which precise or absolute figures provided to aid in understanding this specification are mentioned.

[0031] Embodiments of the present invention will be described in detail below with reference to the attached drawings. The sizes or thicknesses of the areas or parts depicted in the attached drawings may be slightly exaggerated for the clarity of the specification and convenience of explanation. Throughout the detailed description, the same reference numerals indicate the same components.

[0032] FIG. 1 is a cross-sectional view showing a cushioning assembly layer (100) that can be applied to a floor structure for construction, according to one embodiment of the present invention.

[0033] Referring to FIG. 1, a cushioning assembly layer (100) according to an embodiment of the present invention may include a cushioning material layer (10) having a plurality of insertion grooves (G1) formed on at least the lower side, and a plurality of cushioning spring members (20) that are at least partially inserted and disposed in each of the plurality of insertion grooves (G1).

[0034] The buffer layer (10) may have a plate shape, for example. The buffer layer (10) may be a type of panel or board. The buffer layer (10) may include a polymer-based material or be formed from a polymer-based material. For example, the buffer layer (10) may include PF (phenolic foam) or EPS (expanded polystyrene) or be formed from PF or EPS. However, the material of the buffer layer (10) is not limited to PF or EPS, and various other polymer materials may be applied to the buffer layer (10).

[0035] The insertion groove (G1) may be formed to a predetermined depth on the lower side of the cushioning layer (10). A plurality of insertion grooves (G1) may be formed on the lower side of the cushioning layer (10) according to a predetermined rule (or generally randomly). The insertion groove (G1) may be described as a type of 'recess'.

[0036] The cushioning spring member (20) may be placed by being inserted at least partially into the insertion groove (G1). The cushioning spring member (20) may be elastically deformed and restored in the Z-axis direction, that is, in the vertical direction. The cushioning spring member (20) may be referred to as a 'cushioning spring core'. The cushioning spring member (20) may have a low-elasticity structure. Therefore, the cushioning spring member (20) may be referred to as a 'low-elasticity cushioning spring core'. The cushioning spring member (20) may include a plastic material or be formed from a plastic material. For example, the cushioning spring member (20) may be formed to include at least one of various plastic materials such as TPU (thermoplastic polyurethane), PU (polyurethane), PP (polypropylene), EVA (ethylene vinyl acetate), eTPU (engineered TPU), etc. The cushioning spring member (20) may be formed from or include an engineering plastic material such as eTPU. However, the material of the cushioning spring member (20) is not limited to TPU, PU, ​​PP, EVA, or eTPU, and various other plastic materials may be applied to the cushioning spring member (20).

[0037] FIG. 2 is a cross-sectional view showing a cushioning spring member (20A) that can be applied to a cushioning assembly layer according to one embodiment of the present invention.

[0038] Referring to FIG. 2, a cushioning spring member (20A) that can be applied to a cushioning assembly layer according to an embodiment of the present invention may include a lower plate portion (L10), an upper plate portion (L20) spaced apart from the lower plate portion (L10), and a plurality of unit cells (C10) disposed between the lower plate portion (L10) and the upper plate portion (L20). The plurality of unit cells (C10) may have a honeycomb cell structure and may be arranged to form a plurality of layers. The cushioning spring member (20A) may include a vertical column portion (V10) that extends in a vertical direction while interconnecting two vertically adjacent unit cells (C10) among the plurality of unit cells (C10). The vertical column portion (V10) may be extended to protrude into the interior of each of the vertically adjacent unit cells (C10). The vertical column portion (V10) may be referred to as a 'vertical extension portion' or a 'vertical support portion'.

[0039] According to one embodiment, the two vertically adjacent unit cells (C10) may include a first unit cell (C11) and a second unit cell (C12) spaced apart from the first unit cell (C11). A vertical column portion (V10) may be extended to interconnect the central portion of the first unit cell (C11) and the central portion of the second unit cell (C12), and may include a first protrusion (P1) protruding into the interior of the first unit cell (C11) and a second protrusion (P2) protruding into the interior of the second unit cell (C12). The first protrusion (P1) may have a length of, for example, about 10% or more and about 90% or less of the vertical length of the center of the interior space of the first unit cell (C11). In a more preferred example, the first protrusion (P1) may have a length of about 20% or more and about 80% or less of the vertical length of the center of the internal space of the first unit cell (C11). The second protrusion (P2) may have a length of, for example, about 10% or more and about 90% or less of the vertical length of the center of the internal space of the second unit cell (C12). In a more preferred example, the second protrusion (P2) may have a length of about 20% or more and about 80% or less of the vertical length of the center of the internal space of the second unit cell (C12).

[0040] According to one embodiment, the first protrusion (P1) may be spaced apart from the lower surface inside the first unit cell (C11). In the initial state where the cushioning spring member (20A) is not elastically deformed, the lower end of the first protrusion (P1) may be positioned spaced apart from the lower surface inside the first unit cell (C11). The second protrusion (P2) may be spaced apart from the upper surface inside the second unit cell (C12). In the initial state where the cushioning spring member (20A) is not elastically deformed, the upper end of the second protrusion (P2) may be positioned spaced apart from the upper surface inside the second unit cell (C12).

[0041] According to one embodiment, a plurality of unit cells (C10) may further include a third unit cell (C13) laterally connected to a first unit cell (C11) and a fourth unit cell (C14) laterally connected to a second unit cell (C12). The third and fourth unit cells (C13, C14) may be arranged adjacent to each other vertically. The third and fourth unit cells (C13, C14) may be arranged adjacently spaced apart from each other vertically. The third and fourth unit cells (C13, C14) may be provided with a vertical column portion (V10) identical (or substantially identical) to the vertical column portion (V10) described above.

[0042] According to one embodiment, two vertically adjacent unit cells may form a single 'unit cell group,' and the unit cell groups may be arranged in multiple numbers, and the vertical column portion (V10) described above may be provided for each of the multiple unit cell groups. In FIG. 2, the first and second unit cells (C11, C12) may form a single unit cell group, and the third and fourth unit cells (C13, C14) may form another unit cell group, and the vertical column portion (V10) may be provided for each of the unit cell groups. Although FIG. 2 illustrates a case where multiple unit cells (C10) are arranged in a 2×2 arrangement, the number and arrangement method of the multiple unit cells (C10) are not limited to this and may vary.

[0043] According to one embodiment, each of the plurality of unit cells (C10) may have a honeycomb cell structure extending in the Y-axis direction (horizontal direction) in the drawing. The plurality of unit cells (C10) may be arranged side by side. The honeycomb cell structure may have a column shape (horizontally arranged column) with a hexagonal cross-section and a hollow interior. According to one embodiment, the vertical column section (V10) may have a vertical plate structure. The vertical column section (V10) may have a plate structure extending parallel to the extension direction of the unit cells (C10), that is, the Y-axis direction. Both sides of the vertical column section (V10) may be parallel to the YZ plane. However, the structure / shape of the vertical column section (V10) is not limited to the foregoing and may vary depending on the case.

[0044] According to one embodiment, a plurality of unit cells (C10) may include a first unit cell (C11) adjacent to a lower plate (L10) and a second unit cell (C12) adjacent to an upper plate (L20). A first connecting part (N10) connecting the first unit cell (C11) and the lower plate (L10) may be further provided, and a second connecting part (N20) connecting the second unit cell (C12) and the upper plate (L20) may be further provided. The lower plate (L10) and the first unit cell (C11) may be spaced apart from each other, and a first connecting part (N10) connecting them may be disposed between them. The upper plate (L20) and the second unit cell (C12) may be spaced apart from each other, and a second connecting part (N20) connecting them may be disposed between them. The first and second connecting parts (N10, N20) may be applied in the same way to other unit cells. The first and second connecting parts (N10, N20) may be applied in the same way to the third and fourth unit cells (C13, C14). However, according to another embodiment of the present invention, the first and second connecting parts (N10, N20) may be omitted in the cushioning spring member (20A).

[0045] The cushioning spring member (20A) according to an embodiment of the present invention includes a plurality of unit cells (C10) having a honeycomb cell structure, so it can be said to have a structure that mimics a natural ecological structure. As a non-limiting example, the width, length, and height of the cushioning spring member (20A) may each be several tens of mm. The cushioning spring member (20A) may have a cubic shape or a similar three-dimensional shape in its overall form, but is not limited thereto. Due to its structural and material characteristics, the cushioning spring member (20A) may have spring-like elasticity and restoring force in the vertical direction. The cushioning spring member (20A) may have a low-elasticity structure and may exhibit an effect of reducing inter-floor noise in a building. In particular, it may exhibit an effect of effectively reducing heavy impact sound among inter-floor noise.

[0046] Additionally, the cushioning spring member (20A) can have improved resistance to vertical loads by including a vertical column section (V10). The vertical column section (V10) can serve to improve the relatively low resistance performance to loads possessed by the low-elasticity structure. The vertical column section (V10) can serve to support and sustain the cushioning spring member (20A) within a certain range when the cushioning spring member (20A) is pressed by an external force. Therefore, by including the vertical column section (V10), the cushioning spring member (20A) can have further improved cushioning performance and improved inter-floor noise insulation performance. Furthermore, the vertical column section (V10) can serve to improve the durability of the cushioning spring member (20A) against various types of loads that occur during the use of the cushioning spring member (20A).

[0047] FIG. 3 is a perspective view illustrating an exemplary cushioning spring member (20A) that can be applied to a cushioning assembly layer according to an embodiment of the present invention. The structure of the cushioning spring member (20A) of FIG. 3 may be the same as described in FIG. 2.

[0048] FIG. 4 is a cross-sectional view showing a cushioning spring member (20B) that can be applied to a cushioning assembly layer according to another embodiment of the present invention.

[0049] Referring to FIG. 4, the cushioning spring member (20B) according to the present embodiment may have a structure in which a portion of the cushioning spring member (20A) described in FIG. 2 is modified. In the cushioning spring member (20B) according to the present embodiment, the first unit cell (C11) may be in contact with the lower plate (L10), and the second unit cell (C12) may be in contact with the upper plate (L20). Additionally, the third unit cell (C13) may be in contact with the lower plate (L10), and the fourth unit cell (C14) may be in contact with the upper plate (L20). That is, the cushioning spring member (20B) may have a configuration in which the first and second connecting parts (N10, N20) are excluded from the cushioning spring member (20A) described in FIG. 2. The remaining configuration, excluding this part, may be the same as the cushioning spring member (20A) described in FIG. 2.

[0050] The cushioning spring members (20A, 20B) according to the embodiments described with reference to FIGS. 2 and 4 may be manufactured, for example, by a three-dimensional (3D) printer. However, this is merely exemplary, and the method of manufacturing the cushioning spring members (20A, 20B) may vary. The cushioning spring members (20A, 20B) may also be manufactured through a general molding method.

[0051] According to an embodiment of the present invention, a low-elasticity cushioning spring member can be implemented to effectively reduce heavy impact sound in a cushioning structure installed for reducing inter-floor noise in multi-unit housing, etc. Conventional cushioning structures used in the form of plates have a problem in that it is difficult to reduce noise in the 63Hz band, which determines inter-floor noise performance. The cushioning spring member proposed in the embodiment of the present invention is inspired by a honeycomb shape and can be used in a form combined with a plate-shaped cushioning material, and has a dynamic elastic modulus of approximately 4 MN / m² to effectively reduce low-frequency noise generated by impact sound. 3 It can be designed to be as follows, and may feature the ability to supplement / enhance durability and resistance by applying a vertical column section with an 'I'-shaped cross-section internally. Therefore, inter-floor noise insulation performance can be effectively improved by utilizing the cushioning spring member proposed in the embodiment of the present invention and the cushioning assembly layer applying it. In particular, heavy impact noise can be effectively reduced by increasing the noise reduction performance in the 63Hz band, which is a problem as a major cause of inter-floor noise. When the cushioning spring member proposed in the embodiment of the present invention is used in combination with a plate-shaped cushioning material, the dynamic elastic modulus is approximately 4 MN / m 3 By lowering it to this level, it can effectively reduce noise transmitted by running or walking, which is a major cause of inter-floor noise. Additionally, by applying vertical columns to enhance the relatively low load resistance performance inherent in the low-elasticity structure, durability against various types of loads can be supplemented.

[0052] FIG. 5 is a cross-sectional view showing a cushioning spring member (21) according to the first comparative example.

[0053] Referring to FIG. 5, the cushioning spring member (21) according to the first comparative example has a structure similar to the cushioning spring member (20A) according to the embodiment described in FIG. 2, but differs from the cushioning spring member (20A) in the structure of the vertical column portion (V15). In the cushioning spring member (21) according to the first comparative example, with respect to the first and second unit cells (C11, C12), the vertical column portion (V15) has a structure in which it extends only into the interior of the second unit cell (C12) and not into the interior of the first unit cell (C11). In addition, with respect to the third and fourth unit cells (C13, C14), the vertical column portion (V15) has a structure in which it extends only into the interior of the fourth unit cell (C14) and not into the interior of the third unit cell (C13). That is, the vertical column portion (V15) has a protrusion (P5) that protrudes into the interior of the unit cell (C12, C14) positioned at the top.

[0054] FIG. 6 is a cross-sectional view showing a cushioning spring member (22) according to the second comparative example.

[0055] Referring to FIG. 6, the cushioning spring member (22) according to the second comparative example has a structure similar to the cushioning spring member (20A) according to the embodiment described in FIG. 2, but does not have a vertical column section, and instead has an intermediate connecting section (M10) connecting two vertically adjacent unit cells. The intermediate connecting section (M10) does not extend into the unit cell (C10).

[0056] FIG. 7 is a photographic image showing a cushioning spring member according to an embodiment and comparative example of the present invention and a cushioning assembly layer applied thereto to a cushioning material layer.

[0057] Referring to FIG. 7, the cushioning spring member according to the embodiment may have a structure corresponding to the cushioning spring member (20A) described in FIG. 2. The cushioning spring member according to the first comparative example has the same structure as the cushioning spring member (21) described in FIG. 5. The cushioning spring member according to the second comparative example has the same structure as the cushioning spring member (22) described in FIG. 6. Here, the cushioning layer used was a PF (phenolic foam) board. However, the cushioning spring member according to the embodiment shown in FIG. 7 and the cushioning assembly layer including it may be exemplary samples.

[0058] FIG. 8 is a photographic image showing a method of testing physical properties for a cushioning spring member and a cushioning assembly layer including the same, according to the embodiments and comparative examples described in FIG. 7. Here, "W / PF" indicates a case where physical property testing is performed on a cushioning assembly layer in which the cushioning spring member is applied to a cushioning layer (PF board), and "W / O PF" indicates a case where physical property testing is performed on the cushioning spring member without a cushioning layer (PF board).

[0059] The results of the physical property tests in Fig. 8 are as shown in Tables 1 and 2 below.

[0060] < W / PF > Examples Comparative Example 1 Comparative Example 2 m 7.96 7.96 7.96 m' 199.00 199.00 199.00 fn 30.50 - 25.25 kd 7.31 0.00 5.01 damping ratio 17.62 12.94 18.45 loss factor 0.35 0.26 0.37

[0061] < W / O PF > Examples Comparative Example 1 Comparative Example 2 m 7.96 7.96 7.96 m' 199.00 199.00 199.00 fn 30.25 18.50 25.25 kd 7.19 2.69 5.01 damping ratio 18.45 15.83 20.45 loss factor 0.37 0.32 0.41

[0062] Table 1 shows the results for the "W / PF" test, and Table 2 shows the results for the "W / O PF" test. In Tables 1 and 2, m represents the weight (unit: kg) of the load plate (0.2m × 0.2m), and m' represents the size of the load plate as 1 m 2 Weight converted to (Unit: kg / m³) 2 ) and fn is the natural frequency (unit: Hz), and kd is the dynamic elastic modulus (unit: MN / m 3) and damping ratio is the damping ratio (unit: %) and loss factor is the loss factor.

[0063] FIGS. 9 to 14 are drawings according to an embodiment of the present invention, showing various dimensions and arrangements of insertion grooves that a cushioning layer to which a cushioning spring member can be applied may have. In FIGS. 9 to 14, drawing (A) is a plan view showing the lower surface of the cushioning layer, drawing (B) is a plan view showing the upper surface of the cushioning layer, and drawing (C) is a cross-sectional view of the cushioning layer. Through drawings (A) and (C), the depth and arrangement of a plurality of insertion grooves formed in the cushioning layer can be confirmed.

[0064] As illustrated in FIGS. 9 to 14, the cushioning layer may have various dimensions. Additionally, the depth of the insertion grooves formed in the cushioning layer may be adjusted in various ways. The arrangement of the multiple insertion grooves may also be varied. The dimensions of the cushioning layer, the arrangement of the insertion grooves, and the depth of the insertion grooves illustrated in FIGS. 9 to 14 are merely exemplary and may be varied as needed.

[0065] FIG. 15 is a plan view showing a cushioning layer to which a cushioning spring member can be applied, according to an embodiment of the present invention. In FIG. 15, (A) is a plan view showing the lower surface of the cushioning layer, and (B) is a plan view showing the upper surface of the cushioning layer. The shape of the cushioning layer and the arrangement of the insertion grooves shown in FIG. 15 are merely exemplary and can be varied in many ways.

[0066] FIG. 16 is a photographic image showing a cushioning spring member according to an embodiment of the present invention.

[0067] Referring to FIG. 16, the cushioning spring member according to the present embodiment may have a structure as described in FIG. 4. The cushioning spring member may be manufactured using a 3D printer.

[0068] FIG. 17 is a cross-sectional view showing a floor structure (500) for construction including a buffer assembly layer (100) according to one embodiment of the present invention.

[0069] Referring to FIG. 17, a floor structure for construction (hereinafter, floor structure) (500) according to an embodiment of the present invention may be provided on a foundation slab layer (1000). The foundation slab layer (1000) may be a concrete slab layer. A side wall portion (2000) of a building may be placed in contact with the end of the foundation slab layer (1000). The side wall portion (2000) may be a concrete wall. In practice, the foundation slab layer (1000) may be provided over a wide area to occupy a predetermined space, and the side wall portion (2000) may be placed to surround all four sides of the foundation slab layer (1000). Here, only a part of the foundation slab layer (1000), a part of the side wall portion (2000), and a part of the floor structure (500) are shown. The floor structure (500) may be a type of 'ondol layer structure'.

[0070] The floor structure (500) may include a cushioning assembly layer (100) disposed on a foundation slab layer (1000). The cushioning assembly layer (100) may have a configuration as described in FIG. 1. That is, the cushioning assembly layer (100) may be composed of a cushioning material layer (10) and a cushioning spring member (20). Reference may be made to the previously described content regarding the cushioning material layer (10), the cushioning spring member (20), and the cushioning assembly layer (100) including them. The floor structure (500) may include a concrete layer (200) disposed on the cushioning assembly layer (100). The concrete layer (200) may include, for example, a lightweight foamed concrete layer. Additionally, although not illustrated, the floor structure (500) may further include a finishing mortar layer disposed on the concrete layer (200). Furthermore, the configuration of the floor structure (500) may vary in various ways.

[0071] According to the embodiments of the present invention described above, by applying a structure that mimics a natural ecological structure, a cushioning spring member capable of effectively reducing inter-floor noise in a building and a cushioning assembly layer including the same can be realized. According to one embodiment, when a low-elasticity cushioning spring member is combined and applied to a cushioning material layer, the dynamic stiffness is approximately 4 MN / m 3 By lowering the level below a certain threshold, noise transmitted by running or walking, which is a major cause of inter-floor noise, can be effectively reduced. Furthermore, according to one embodiment, by applying a vertical column member to increase the load-resistant performance of the low-elasticity cushioning spring member, the durability against various types of loads occurring during the use of the cushioning assembly layer can be improved, and the cushioning effect and inter-floor noise suppression effect can be further enhanced. Additionally, according to embodiments of the present invention, by applying the above-mentioned cushioning assembly layer, a building floor structure having an excellent inter-floor noise reduction effect, including blocking / reducing heavy impact sound, can be realized.

[0072] This specification discloses preferred embodiments of the present invention. Although specific terms have been used, they are used merely in a general sense to facilitate the explanation of the technical content of the invention and to aid in understanding the invention, and are not intended to limit the scope of the invention. It is obvious to those skilled in the art that, in addition to the embodiments disclosed herein, other variations based on the technical concept of the present invention are possible. For example, those skilled in the art will understand that the cushioning spring member for reducing inter-floor noise, the cushioning assembly layer including the same, and the building floor structure according to the embodiments described with reference to FIGS. 1 to 4 and FIGS. 7 to 17 can be modified in various ways. Therefore, the scope of the invention should not be determined by the described embodiments but by the technical concept described in the claims. Explanation of the symbols

[0073] 10: Cushioning layer 20, 20A, 20B: Cushioning spring member C10, C11~C14: Unit cell G1: Insertion groove L10: Bottom plate L20: Top plate N10: 1st connection part N20: 2nd connection part P1: First protrusion P2: Second protrusion V10 : Vertical column section 200 : Concrete layer 500 : Building floor structure 1000 : Foundation slab layer 2000 : Sidewall

Claims

Claim 1 A cushioning spring member applied to a floor structure for construction, comprising: a lower plate portion; an upper plate portion spaced apart from the lower plate portion; a plurality of unit cells arranged to form a plurality of layers between the lower plate portion and the upper plate portion and having a honeycomb cell structure; and a vertical column portion extending in a vertical direction while interconnecting two vertically adjacent unit cells among the plurality of unit cells and extending to protrude into the interior of each of the two unit cells; wherein the two vertically adjacent unit cells include a first unit cell and a second unit cell spaced apart therefrom on the first unit cell, and the vertical column portion extends to interconnect the central portion of the first unit cell and the central portion of the second unit cell, and includes a first protrusion protruding into the interior of the first unit cell and a second protrusion protruding into the interior of the second unit cell, wherein the first protrusion is spaced apart from the lower surface of the interior of the first unit cell and the second protrusion is spaced apart from the upper surface of the interior of the second unit cell. Claim 2 delete Claim 3 delete Claim 4 A cushioning spring member according to claim 1, wherein the plurality of unit cells further include a third unit cell laterally joined to the first unit cell and a fourth unit cell laterally joined to the second unit cell, wherein the third and fourth unit cells are arranged adjacently vertically, and the third and fourth unit cells are provided with a vertical column identical to the vertical column. Claim 5 A cushioning assembly layer applied to a floor structure for construction, comprising: a cushioning material layer having a plurality of insertion grooves formed at least on the lower side; and a plurality of cushioning spring members disposed by being partially inserted into each of the plurality of insertion grooves; wherein the cushioning spring members comprise: a lower plate portion; an upper plate portion spaced apart from the lower plate portion; and a plurality of unit cells having a honeycomb cell structure, disposed to form a plurality of layers between the lower plate portion and the upper plate portion. A vertical column portion extending in a vertical direction while interconnecting two vertically adjacent unit cells among the plurality of unit cells, and extending to protrude into the interior of each of the two unit cells; wherein the two vertically adjacent unit cells include a first unit cell and a second unit cell spaced apart therefrom on the first unit cell, and the vertical column portion extends to interconnect the central portion of the first unit cell and the central portion of the second unit cell, and includes a first protrusion protruding into the interior of the first unit cell and a second protrusion protruding into the interior of the second unit cell, wherein the first protrusion is spaced apart from the lower surface of the interior of the first unit cell and the second protrusion is spaced apart from the upper surface of the interior of the second unit cell, and a cushioning assembly layer. Claim 6 delete Claim 7 delete Claim 8 In claim 5, the plurality of unit cells further include a third unit cell laterally joined to the first unit cell and a fourth unit cell laterally joined to the second unit cell, wherein the third and fourth unit cells are arranged adjacently vertically, and a buffer assembly layer having a vertical column identical to the vertical column for the third and fourth unit cells. Claim 9 In claim 5, the two vertically adjacent unit cells form a unit cell group, the unit cell groups are arranged in plurality, and the vertical column portion is provided for each of the plurality of unit cell groups, forming a buffer assembly layer. Claim 10 In claim 5, the vertical column portion is a buffer assembly layer having a vertical plate structure. Claim 11 A buffer assembly layer according to claim 5, wherein the plurality of unit cells includes a first unit cell adjacent to the lower plate and a second unit cell adjacent to the upper plate, wherein the first unit cell contacts the lower plate or is further provided with a first connecting part connecting the first unit cell and the lower plate, and the second unit cell contacts the upper plate or is further provided with a second connecting part connecting the second unit cell and the upper plate. Claim 12 In claim 5, the buffer layer is a buffer assembly layer comprising a polymer-based material. Claim 13 In claim 5, the cushioning spring member comprises a cushioning assembly layer including a plastic material. Claim 14 A building floor structure provided on a foundation slab layer, comprising: a buffer assembly layer described in any one of claims 5, 8 to 13 disposed on the foundation slab layer; and a concrete layer disposed on the buffer assembly layer.

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