Bed structure

Abstract

To appropriately improve cutoff performance of a floor impact sound having a frequency which is an indicator of a floor structure.SOLUTION: A floor structure 1 comprises: multiple floor beams 2 extending in an X-axis direction; multiple floor panels 3 supported by the respective floor beams 2 from a lower side in a state of being arranged adjacent to each other in a X axis direction, multiple vibration-proof materials 4 arranged between the floor beams 2 and the floor panels 3; and connection members 5 for connecting the multiple floor panels 3. The connection members 5 connect the multiple floor panels 3 by being fixed relative to each of the multiple floor panels 3 using fasteners 7 in a state of being arranged at positions apart in a Y-axis direction from the floor beams 2.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a floor structure including a floor beam and a plurality of floor panels provided on the floor beam. [Background technology]

[0002] A known floor structure for a building includes floor beams, a plurality of floor panels provided on the floor beams, and vibration-isolating materials (elastic members) provided between the floor beams and each floor panel (see, for example, Patent Document 1). In such a floor structure, the vibration-isolating materials elastically deform in response to vibrations of each floor panel, thereby suppressing the transmission of vibrations from each floor panel to the floor beams. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6428840 Summary of the Invention [Problem to be solved by the invention]

[0004] The vibration-damping material is adjusted to lower the resonance frequency of each floor panel, suppressing the propagation of vibrations to the floor beams due to impact forces in frequency bands higher than the resonance frequency of the floor structure, thereby improving the insulation performance of floor impact noise, which has a frequency that is an indicator of the floor structure.

[0005] However, in the floor structure described in Patent Document 1, multiple floor panels are mounted on floor beams via vibration-isolating materials in a state where rotation around the vertical axis and twisting relative to the horizontal plane of each floor panel are not sufficiently restricted. Therefore, in the floor structure described in Patent Document 1, there is a risk that when an impact is applied to each floor panel, each of the multiple floor panels will vibrate independently due to rotation and twisting.

[0006] When multiple floor panels vibrate individually, higher-order vibration modes of the floor structure occur, increasing the vibration in the index frequency band, which creates the problem of not being able to adequately improve the insulation performance of the floor impact noise having the index frequency of the floor structure.

[0007] The present invention has been made in view of the above circumstances, and its object is to precisely improve the blocking performance of floor impact noise having a frequency that is an indicator of floor structure. [Means for solving the problem]

[0008] A floor structure according to one aspect of the present invention includes a plurality of floor beams extending in a first horizontal direction and arranged at predetermined intervals in a second horizontal direction intersecting the first horizontal direction, and a plurality of floor beams extending in a first horizontal direction and arranged adjacent to each other in the first horizontal direction, the plurality of floor beams spanning between two adjacent floor beams and arranged adjacent to each other in the first horizontal direction. And they are in close contact with each other a plurality of floor panels supported from below by the floor beams in a first horizontal direction; a plurality of vibration-damping materials that suppress transmission of vibration from the plurality of floor panels to the floor beams by elastically deforming between the floor beams and the plurality of floor panels; and a plurality of floor panels arranged in the first horizontal direction, attached to the underside of each floor panel. directly and a connecting member that connects the plurality of floor panels in an abutting state. The connecting member is fixed to each of the plurality of floor panels by a fastener while being disposed at a position spaced apart from the floor beam in the second horizontal direction, thereby connecting the plurality of floor panels. By doing so, the plurality of floor panels are integrated. .

[0009] According to this floor structure, vibration-damping materials are provided between the floor beams and the multiple floor panels. Therefore, the vibration-damping materials elastically deform in response to the vibration of each floor panel, lowering the resonance frequency of the floor structure and suppressing the propagation of vibrations to the floor beams due to impact forces in frequency bands higher than the resonance frequency. This improves the floor structure's ability to block floor impact noise with frequencies that are indicative of the floor structure.

[0010] Here, to lower the resonant frequency of the floor panel and efficiently improve the floor impact noise insulation performance with a frequency that is an index for the floor structure, it is better to soften the vibration-damping material. However, if the vibration-damping material is compressed beyond the allowable value due to the floor panel's own weight and the load it receives, there is a risk that it will not be possible to improve the floor impact noise insulation performance with the index frequency. For this reason, it is necessary to set the softness of the vibration-damping material based on the load it receives and the allowable load of the vibration-damping material, which indicates the allowable value for that load.

[0011] When vibration-proofing materials are softened to a degree that the load they can withstand does not exceed the allowable load, if the softness exceeds a certain level, multiple floor panels will vibrate independently, rotating and twisting when an impact is applied to each panel. When multiple floor panels vibrate individually, higher-order vibration modes of the floor structure occur, and vibrations in a specific frequency band, which is an indicator of the floor impact sound insulation performance, become stronger.

[0012] Therefore, multiple floor panels are connected using connecting members fixed to each of the multiple floor panels with fasteners. The multiple floor panels can be integrated by connecting them using these connecting members. In this case, the connecting members connect the multiple floor panels at a position below each floor panel, away from the floor beams on which the vibration-damping material is provided. This allows the multiple floor panels to be integrated by connecting them using the connecting members while maintaining the vibration-damping effect of the vibration-damping material without inhibiting the elastic deformation of the vibration-damping material. By integrating the multiple floor panels using such connecting members, it is possible to suppress the multiple floor panels from vibrating individually with rotation and twisting. This makes it possible to accurately improve the insulation performance of floor impact noise having a frequency that is an indicator of the floor structure.

[0013] Furthermore, because the connecting members are disposed on the lower side of each floor panel, changes in floor level can be suppressed compared to when they are disposed on the upper side of each floor panel, and multiple floor panels can be integrated by connecting them with the connecting members. This makes it possible to minimize changes to the overall specifications of the floor structure, integrate multiple floor panels by connecting them from below with the connecting members, and accurately improve the insulation performance of floor impact noise having frequencies that are indicators of the floor structure.

[0014] In the above floor structure, the connecting member may include a pair of first connecting members extending in the first horizontal direction and connecting adjacent connecting areas inside the areas supported by the floor beams at one end and the other end of each of the plurality of floor panels in the second horizontal direction.

[0015] In this embodiment, one end and the other end of each of the multiple floor panels are connected by the first connecting member, so that the one end and the other end of each floor panel can be prevented from vibrating individually, thereby accurately improving the insulation performance of floor impact noise having a frequency that is an indicator of the floor structure.

[0016] In the above floor structure, the connecting member may further include a second connecting member extending in the first horizontal direction and connecting an intermediate portion between one end and the other end in the second horizontal direction of each of the plurality of floor panels.

[0017] In this configuration, one end and the other end of each of the multiple floor panels are connected by a first connecting member, and the intermediate portion between the one end and the other end is connected by a second connecting member. This allows the multiple floor panels to be more firmly integrated, more reliably preventing the multiple floor panels from vibrating individually with rotation or twisting. This makes it possible to more accurately improve the insulation performance of floor impact noise having a frequency that is an indicator of the floor structure.

[0018] The above floor structure may further include a restricting member that has a facing portion that is disposed below the floor beam and faces the floor beam in a plan view, and a fixing portion that extends from the facing portion in a direction away from the floor beam in the second horizontal direction and is fixed to the underside of the floor panel, and restricts upward movement of the floor panel relative to the floor beam. In this case, the fixing portion is fixed to the floor panel by the same fastener as the connecting member.

[0019] In this aspect, the fixing portion of the restricting member is fixed to the underside of the floor panel, and the opposing portion is disposed under the floor beam and faces the floor beam, thereby restricting upward movement of the floor panel relative to the floor beam. Also, because the fixing portion of the restricting member is fixed to the floor panel with the same fastener as the connecting member, there is no need to form separate fastening holes for the restricting member and the connecting member in the floor panel, for example.

[0020] In the above floor structure, the connecting member may have a portion that abuts against the restricting member so as to restrict rotation of the restricting member.

[0021] In this configuration, the connecting member has the function of restricting rotation of the restricting member, so that when the fastener is used to fasten the fixed portion of the restricting member to the floor panel, the restricting member can be prevented from rotating around the fastener, thereby improving workability when fastening the restricting member to the floor panel.

[0022] In the above floor structure, the connecting member may have a contact portion that contacts the lower surface of each of the plurality of floor panels, and an extension portion that extends downward from the contact portion.

[0023] In this aspect, the connecting member has a contact portion that contacts the underside of each floor panel and an extension portion that extends downward from the contact portion, thereby increasing the bending strength of the connecting member. This prevents the connecting member from deforming when suppressing the vibration of each of the floor panels, thereby improving the vibration suppression effect of the connecting member. [Effects of the Invention]

[0024] As described above, according to the present invention, it is possible to precisely improve the blocking performance of floor impact noise having frequencies that are indicators of floor structure. [Brief explanation of the drawings]

[0025] [Figure 1] FIG. 1 is a side cross-sectional view of a floor structure according to a first embodiment of the present invention. [Figure 2] FIG. 2 is a plan view of the floor structure of FIG. 1 as seen from below. [Figure 3] 10 is a graph showing the measurement results of heavy floor impact noise. [Figure 4] FIG. 10 is a plan view of a floor structure according to a second embodiment of the present invention, viewed from below. DETAILED DESCRIPTION OF THE INVENTION

[0026] A floor structure according to an embodiment of the present invention will be described below with reference to the drawings. Note that directional relationships will be described below using XYZ orthogonal coordinate axes. The X-axis direction is parallel to the horizontal plane, the Y-axis direction is perpendicular to the X-axis direction on the horizontal plane, and the Z-axis direction is an up-down direction perpendicular to both the X and Y directions. One side in the X-axis direction will be referred to as the "+X side," and the other side opposite the one side in the X-axis direction will be referred to as the "-X side." One side in the Y-axis direction will be referred to as the "+Y side," and the other side opposite the one side in the Y-axis direction will be referred to as the "-Y side." The upper side in the Z-axis direction will be referred to as the "+Z side," and the lower side opposite the one side in the Z-axis direction will be referred to as the "-Z side."

[0027] (First embodiment) A floor structure 1 according to a first embodiment is shown in Figures 1 and 2. The floor structure 1 is, for example, part of a steel-framed building, and constitutes the floor of one story (for example, the third floor). The floor structure 1 includes a plurality of floor beams 2, a plurality of vibration-proof materials 4 provided on the floor beams 2, a plurality of floor panels 3 provided on the floor beams 2 from above the vibration-proof materials 4, a connecting member 5 provided across each of the floor panels 3, and a plurality of restricting members 6 arranged corresponding to each of the floor panels 3.

[0028] The multiple floor beams 2 extend in the X-axis direction (first horizontal direction) and are arranged parallel to one another at predetermined intervals in the Y-axis direction (second horizontal direction). The floor beams 2 are, for example, made of H-beam steel with an H-shaped cross section. In this case, the floor beams 2 have a pair of flanges 21 and a web 22 connecting the flanges 21 to each other. The floor beams 2 are arranged so that the pair of flanges 21 extend in the X-axis direction with the pair of flanges 21 aligned in the Z-axis direction.

[0029] The floor panels 3 straddle two adjacent floor beams 2 and are supported from below (-Z side) by each floor beam 2 while being arranged adjacent to one another in the X-axis direction. The floor panels 3 are made of, for example, a floor slab, ALC (autoclaved lightweight aerated concrete), hollow extruded cement board, etc. In this embodiment, the floor panels 3 are made of hollow extruded cement board. In this case, the floor panels 3 have a hollow portion 31, which is filled with a sand-like inorganic material.

[0030] The floor panel 3 is a plate-like member having a rectangular planar shape. For example, the size of the floor panel 3 is 2000 mm in the longitudinal direction and 250 mm or 500 mm in the width direction. The floor panel 3 is spanned between two floor beams 2 with its longitudinal direction oriented in the Y-axis direction, its width direction oriented in the X-axis direction, and its thickness direction oriented in the Z-axis direction. In this state, the multiple floor panels 3 are provided on each floor beam 2 adjacent to each other in the X-axis direction along a horizontal plane. Specifically, with the upper surface 32 on one side of the thickness direction of each of the multiple floor panels 3 facing the +Z side and the lower surface 33 on the other side of the thickness direction facing the -Z side, a support region 341 of one end 34 in the Y-axis direction (longitudinal direction) is supported from the lower side (-Z side) by the flange 21 of the floor beam 2, and a support region 351 of the other end 35 in the Y-axis direction is supported from the lower side (-Z side) by the flange 21 of the floor beam 2.

[0031] Each of the multiple vibration-damping materials 4 is a member that can elastically deform in response to the relative movement of the floor panel 3 with respect to the floor beam 2. The vibration-damping materials 4 are made of, for example, synthetic resin such as polyurethane or rubber. Each of the multiple vibration-damping materials 4 elastically deforms between the floor beam 2 and the floor panel 3, thereby suppressing the transmission of vibration from the floor panel 3 to the floor beam 2.

[0032] The dimensions, hardness, placement position, and number of the vibration-damping materials 4 are set based on the load received by the vibration-damping materials 4 (i.e., the weight of the floor panel 3 placed on the vibration-damping materials 4 and the load received by the floor panel 3) so as to be able to accurately suppress the transmission of vibration from the floor panel 3 to the floor beams 2. Figure 2 shows an example in which the vibration-damping materials 4 are placed on the upper (+Z side) flange 21 of a pair of flanges 21 of the floor beam 2, at positions that correspond to the four corners of each floor panel 3 in a plan view.

[0033] The connecting member 5 connects multiple floor panels 3 lined up in the X-axis direction while abutting against the underside 33 of each floor panel 3. The connecting member 5 is disposed between two floor beams 2 adjacent to each other in the Y-axis direction, spaced apart inward from the floor beams 2 in the Y-axis direction, and is fixed to each of the multiple floor panels 3 from below (-Z side) with fastening bolts 7 (fasteners), thereby connecting the multiple floor panels 3. As shown in FIG. 1, the fastening bolts 7 are fastened to fastening nuts 311 disposed in the hollow portions 31 of the floor panels 3. The number of floor panels 3 connected by the connecting member 5 is not particularly limited as long as it is two or more. In FIG. 2, the connecting member 5 connects four floor panels 3 lined up in the X-axis direction.

[0034] As described above, in the floor structure 1 according to this embodiment, vibration-proofing materials 4 are provided between the floor beams 2 and the plurality of floor panels 3. Therefore, the vibration-proofing materials 4 elastically deform in response to the vibration of each floor panel 3, thereby lowering the resonance frequency of each floor panel 3 and suppressing the propagation of vibrations to the floor beams 2 and the ceiling below due to impact forces in a frequency band higher than the resonance frequency of the floor structure 1. This makes it possible to improve the insulation performance of floor impact sounds (hereinafter referred to as "heavy floor impact sounds") having an index frequency in the floor structure 1.

[0035] Here, in order to lower the resonance frequency of the floor panel 3 and efficiently improve the insulation performance of heavy floor impact noise, it is better to soften the vibration-proof material 4. However, if the vibration-proof material 4 is compressed beyond the allowable value due to the weight of the floor panel 3 and the load received by the floor panel 3, there is a risk that it will not be possible to improve the insulation performance of heavy floor impact noise. For this reason, it is necessary to set the softness of the vibration-proof material 4 based on the load received by the vibration-proof material 4 and the allowable load of the vibration-proof material 4, which indicates the allowable value of that load.

[0036] When the vibration-proofing material 4 is softened within a range in which the load it receives does not exceed the allowable load, if the softness exceeds a certain level, a phenomenon occurs in which each of the multiple floor panels 3 vibrates, rotating and twisting independently, when an impact is applied to each floor panel 3. When the multiple floor panels 3 vibrate individually, the vibration in a specific frequency band (63 Hz band with a center frequency of 63 Hz), which is an indicator of the floor structure 1's ability to block heavy floor impact sound, becomes large.

[0037] Therefore, the floor panels 3 are connected by connecting members 5 fixed to each of the floor panels 3 from the lower side (-Z side) with fastening bolts 7. The floor panels 3 can be integrated by connecting them with these connecting members 5. In this case, the connecting members 5 connect the floor panels 3 on the lower side of each floor panel 3 at a position separated from the floor beams 2 on which the vibration-damping materials 4 are provided. This allows the floor panels 3 to be integrated by connecting them with the connecting members 5 while maintaining the vibration-damping effect of the vibration-damping materials 4 without inhibiting the elastic deformation of the vibration-damping materials 4. By integrating the floor panels 3 with these connecting members 5, it is possible to suppress the floor panels 3 from vibrating individually with rotation and twisting. This allows the floor structure 1 to accurately improve its ability to block heavy floor impact noise.

[0038] The effect of integrating multiple floor panels 3 with connecting members 5 on the heavy-duty floor impact sound insulation performance will be explained with reference to the graph of heavy-duty floor impact sound measurement results shown in Figure 3. The solid curve D1 in Figure 3 shows the floor impact sound level characteristics of the floor structure 1 according to this embodiment, in which multiple floor panels 3 are connected with connecting members 5. On the other hand, the dashed-dotted curve D2 in Figure 3 shows the floor impact sound level characteristics of the floor structure according to the comparative example, in which multiple floor panels 3 are not connected. As is clear from Figure 3, the floor impact sound level in the 63 Hz band, whose center frequency is 63 Hz and which is an index of the heavy-duty floor impact sound insulation performance, is reduced by integrating multiple floor panels 3 with connecting members 5. This result shows that integrating multiple floor panels 3 with connecting members 5 improves the heavy-duty floor impact sound insulation performance of the floor structure 1.

[0039] In the floor structure 1, an underfloor material such as particle board is screwed onto each floor panel 3. In this case, each floor panel 3 is connected from above (+Z side) by the underfloor material, but this underfloor material alone is not enough to firmly integrate the multiple floor panels 3 to an extent that it is possible to improve the floor structure 1's ability to block out heavy floor impact noise.

[0040] Furthermore, in the floor structure 1 according to this embodiment, as already described, the connecting members 5 are arranged on the lower side (-Z side) of each floor panel 3, so that, compared to when connecting members are arranged on the upper side (+Z side) of each floor panel 3, it is possible to integrate multiple floor panels 3 by connecting them with the connecting members 5 while suppressing changes in floor level. This makes it possible to integrate multiple floor panels 3 by connecting them from the lower side with the connecting members 5 while minimizing changes to the overall specifications of the floor structure 1, and accurately improve the insulation performance of the floor structure 1 against heavy floor impact noise.

[0041] If connecting members are arranged above each floor panel 3, the connecting members will be separated in the area of ​​the pillars erected on the floor panels 3. In this case, the effect of the connecting members in integrating the multiple floor panels 3 will be reduced. In contrast, in the floor structure 1 according to this embodiment, the connecting members 5 are arranged below each floor panel 3, so it is possible to prevent the connecting members 5 from being separated by the pillars.

[0042] As shown in FIGS. 1 and 2, the connecting member 5 includes a pair of first connecting members 51 and a second connecting member 52.

[0043] The pair of first connecting members 51 are plate-shaped members extending in the X-axis direction. The pair of first connecting members 51 are made of, for example, a steel plate having a rectangular planar shape and a thickness of 4.5 mm. The width dimension of the pair of first connecting members 51 is set to, for example, 50 mm. The length dimension of the pair of first connecting members 51 in the longitudinal direction is set based on the width dimension of the floor panels 3 to be connected and the number of connected panels. For example, when connecting four floor panels 3 each having a width dimension of 500 mm, the length dimension of the pair of first connecting members 51 in the longitudinal direction is set to 1632 mm. The pair of first connecting members 51 are arranged so as to abut against the undersides 33 of the multiple floor panels 3 arranged in the X-axis direction, with their length direction oriented in the X-axis direction, their width direction oriented in the Y-axis direction, and their thickness direction oriented in the Z-axis direction.

[0044] The pair of first connecting members 51 connect adjacent connection regions 342, 352 on the inside of the support regions 341, 351 at one end 34 and the other end 35 in the Y-axis direction of each of the multiple floor panels 3. Specifically, one first connecting member 51 is fixed by a fastening bolt 7 in a state in which it abuts from below against the connection region 342 adjacent to the inside of the support region 341 at one end 34 in the Y-axis direction of each of the multiple floor panels 3. In this state, one first connecting member 51 connects the connection regions 342 at one end 34 of the multiple floor panels 3 at a position spaced from the floor beam 2 on the -Y side. The other first connecting member 51 is fixed by the fastening bolt 7 in a state in which it abuts from below against the connecting region 352 adjacent to the inside of the support region 351 at the other end 35 of each of the multiple floor panels 3 in the Y-axis direction, thereby connecting the connecting regions 352 at the other end 35 of the multiple floor panels 3. In this state, the other first connecting member 51 connects the connecting regions 352 at the other end 35 of the multiple floor panels 3 at a position spaced from the floor beam 2 on the +Y side.

[0045] The first connecting members 51 connect the one end 34 and the other end 35 of each of the floor panels 3, thereby preventing the one end 34 and the other end 35 of each floor panel 3 from vibrating individually. This effectively improves the insulation performance of the floor structure 1 against heavy floor impact noise.

[0046] The second connecting member 52 is a plate-like member that has the same shape and size as the pair of first connecting members 51 and extends in the X-axis direction. The second connecting member 52 connects the intermediate portions 36 of each of the multiple floor panels 3 between one end 34 and the other end 35 in the Y-axis direction. Specifically, the second connecting member 52 connects the intermediate portions 36 of the multiple floor panels 3 by being fixed with fastening bolts 7 while abutting against the intermediate portions 36 of each of the multiple floor panels 3 from below. In this state, the second connecting member 52 connects the intermediate portions 36 of the multiple floor panels 3 at positions spaced apart from the floor beams 2 in the Y-axis direction. Note that while FIGS. 1 and 2 show an example in which one second connecting member 52 is provided at the center in the Y-axis direction between one end 34 and the other end 35 of the multiple floor panels 3, two or more second connecting members 52 may be provided. When multiple second connecting members 52 are provided, the second connecting members 52 may be arranged so that they are lined up at equal intervals in the Y-axis direction between one end 34 and the other end 35 of the multiple floor panels 3. In this case, for example, the second connecting members 52 can be arranged at positions that divide the area between one end 34 and the other end 35 of the multiple floor panels 3 into three equal parts in the Y-axis direction.

[0047] In addition to the one end 34 and the other end 35 of each of the multiple floor panels 3 being connected by the first connecting member 51, the intermediate portion 36 between the one end 34 and the other end 35 is connected by the second connecting member 52. This allows the multiple floor panels 3 to be more firmly integrated, making it possible to more reliably prevent the multiple floor panels 3 from vibrating individually with rotation or twisting. This makes it possible to more accurately improve the insulation performance of the floor structure 1 against heavy floor impact noise.

[0048] 1 and 2, each of the pair of first connecting members 51 and second connecting members 52 has an abutment portion 53 that abuts against the underside 33 of each of the plurality of floor panels 3, and an extension portion 54 that extends downward from the abutment portion 53. The abutment portion 53 is formed in the shape of a rectangular flat plate extending in the X-axis direction. The abutment portion 53 has bolt insertion holes 531 through which fastening bolts 7 are inserted, at positions corresponding to each of the plurality of floor panels 3 lined up in the X-axis direction. The extension portion 54 extends in the X-axis direction along the abutment portion 53 and extends downward from the abutment portion 53. The pair of first connecting members 51 and second connecting members 52 configured as described above can be produced, for example, by bending a steel plate so that the cross-sectional shape is L-shaped.

[0049] The bending strength of each of the connecting members 51, 52 can be increased by configuring the pair of first connecting members 51 and second connecting members 52 to have a contact portion 53 that contacts the underside 33 of each floor panel 3 and an extension portion 54 that extends downward from the contact portion 53. This makes it possible to prevent the connecting members 51, 52 from deforming when suppressing the individual vibrations of the multiple floor panels 3, thereby improving the vibration suppression effect of each of the connecting members 51, 52.

[0050] 1 and 2, the floor structure 1 according to this embodiment is provided with a plurality of restricting members 6. The restricting members 6 are arranged corresponding to each of the floor panels 3 on the lower side (-Z side) of the plurality of floor panels 3, and are members for restricting the upward movement of each floor panel 3 relative to the floor beams 2.

[0051] The restricting member 6 is formed, for example, by a member generally referred to as a Z-clip. In a plan view seen from the Z-axis direction, the restricting member 6 has a facing portion 62 disposed below the flange 21 of the floor beam 2 and facing the flange 21 from below, a fixed portion 61 extending from the facing portion 62 along the Y-axis direction away from the floor beam 2 and fixed to the underside 33 of the floor panel 3 from below by a fastening bolt 7, and a connecting portion 63 connecting the fixed portion 61 and the facing portion 62. In the restricting member 6, the fastening bolt 7 is inserted into a bolt insertion hole 611 formed in the fixed portion 61, and the fixed portion 61 is fixed to the floor panel 3 by the fastening bolt 7. In this state, the facing portion 62 faces the flange 21 of the floor beam 2 from below, thereby restricting upward movement of the floor panel 3 relative to the floor beam 2. At this time, the multiple restricting members 6 are each fixed to the floor panel 3 at the fixing portion 61 by a pair of first connecting members 51 and the common fastening bolt 7.

[0052] In the floor structure 1, the fixing portion 61 of each regulating member 6 is fixed to the underside 33 of the floor panel 3, and the opposing portion 62 is disposed below the flange 21 of the floor beam 2 and faces the flange 21, thereby restricting upward movement of the floor panel 3 relative to the floor beam 2. Furthermore, because the fixing portion 61 of each regulating member 6 is fixed to the floor panel 3 by the same fastening bolt 7 as the first connecting member 51, it is not necessary, for example, to form separate fastening holes for the regulating member 6 and the first connecting member 51 in the floor panel 3.

[0053] Furthermore, when the restricting member 6 and the first connecting member 51 are fixed to the floor panel 3 with a common fastening bolt 7, the fastening bolt 7 is inserted with the bolt insertion hole 611 formed in the fixing portion 61 of the restricting member 6 overlapping the bolt insertion hole 531 formed in the abutting portion 53 of the first connecting member 51. In this state, the extension portion 54 of the first connecting member 51 extending downward from the abutting portion 53 is positioned adjacent to the end of the fixing portion 61 of the restricting member 6 opposite to the side to which the opposing portion 62 is connected. Therefore, the extension portion 54 of the first connecting member 51 is a portion that can abut against the fixing portion 61 of the restricting member 6 so as to restrict rotation of the restricting member 6 about the fastening bolt 7. In other words, the extension portion 54 of the first connecting member 51 has the function of restricting rotation of the restricting member 6. In this case, when the restricting member 6 is fixed to the floor panel 3 with the fastening bolt 7, the restricting member 6 can be prevented from rotating about the fastening bolt 7. This improves the workability when fixing the restricting member 6 to the floor panel 3.

[0054] (Second embodiment) A floor structure 1A according to the second embodiment is shown in Figure 4. Here, components that differ from those in the first embodiment will be described, and descriptions of other components will be omitted.

[0055] In the floor structure 1A according to the second embodiment, the configuration of the connecting members 5A is different from that of the first embodiment. In the floor structure 1 according to the first embodiment, the connecting members 5 that connect multiple floor panels 3 lined up in the X-axis direction are composed of first connecting members 51 and second connecting members 52 that extend in the X-axis direction. In contrast, in the floor structure 1A according to the second embodiment, the connecting members 5A that connect multiple floor panels 3 lined up in the X-axis direction are plate-shaped members that extend in the Y-axis direction.

[0056] The connecting member 5A is fixed to each floor panel 3 with fastening bolts 7 while abutting against the underside 33 of each floor panel 3 so as to cover from below the joint extending in the Y-axis direction between two floor panels 3 adjacent to each other in the X-axis direction. The connecting member 5A connects each floor panel 3 at a position spaced apart in the Y-axis direction from the floor beam 2 on which the vibration-damping material 4 is provided, on the underside of each floor panel 3. This allows the floor panels 3 to be integrated by the connection with the connecting member 5A while maintaining the vibration-damping effect of the vibration-damping material 4 without inhibiting the elastic deformation of the vibration-damping material 4. The integration of the floor panels 3 with the connecting member 5A in this way prevents each floor panel 3 from vibrating individually with rotation or twisting. This effectively improves the insulation performance of heavy floor impact noise in the floor structure 1A.

[0057] As shown in Figure 4, the connecting member 5A has a contact portion 5A1 that contacts the underside 33 of each floor panel 3 so as to cover the joints between each floor panel 3, and a first extension portion 5A2 and a second extension portion 5A3 that extend downward from the contact portion 5A1.

[0058] The contact portion 5A1 is formed in the shape of a rectangular flat plate extending in the Y-axis direction. The contact portion 5A1 is fixed to each floor panel 3 by a fastening bolt 7 in a state in which the contact portion 5A1 is in contact with the lower surface 33 of each floor panel 3.

[0059] The first extending portion 5A2 extends in the Y-axis direction along the edge of the contact portion 5A1 in the X-axis direction, and extends downward from the contact portion 5A1.

[0060] The second extending portions 5A3 extend downward from positions close to the fixing portion 61 of the restricting member 6 on one end 5A11 and the other end 5A12 in the Y-axis direction of the contact portion 5A1.

[0061] The bending strength of the connecting member 5A can be increased by configuring the connecting member 5A to have a contact portion 5A1 that contacts the underside 33 of each floor panel 3, and a first extending portion 5A2 and a second extending portion 5A3 that extend downward from the contact portion 5A1. This can prevent the connecting member 5A from deforming when suppressing the individual vibrations of each floor panel 3, thereby improving the vibration suppression effect of the connecting member 5A.

[0062] Furthermore, in the floor structure 1A, each of the multiple regulating members 6 is fixed to each floor panel 3 by a fastening bolt 7 that is shared with the connecting member 5A. In this case, the second extending portion 5A3 of the connecting member 5A extends downward from a position at the abutment portion 5A1 that is close to the fixing portion 61 of the regulating member 6. Therefore, the second extending portion 5A3 of the connecting member 5A has the function of restricting rotation of the regulating member 6 about the fastening bolt 7. In this case, when the regulating member 6 is fixed to the floor panel 3 by the fastening bolt 7, the regulating member 6 can be prevented from rotating about the fastening bolt 7. This improves the workability when fixing the regulating member 6 to the floor panel 3. [Explanation of symbols]

[0063] 1,1A floor structure 2 floor beams 3 Floor Panels 4 Vibration isolation material 5,5A Connecting member 51 First connecting member 52 Second connecting member 53 Contact part 54 Extension 6 Regulatory elements 61 Fixed part 62 Opposing part 7 Fastening bolts (fasteners) X 1st direction Y Second direction

Claims

1. a plurality of floor beams extending in a first horizontal direction and arranged at predetermined intervals in a second horizontal direction intersecting the first horizontal direction; a plurality of floor panels that straddle two adjacent floor beams, are arranged adjacent to each other in the first horizontal direction, and are supported by each floor beam from below in a state of close contact with each other; a plurality of vibration-damping materials that elastically deform between the floor beams and the plurality of floor panels to suppress transmission of vibrations from the plurality of floor panels to the floor beams; a connecting member that connects the plurality of floor panels arranged in the first horizontal direction in a state of direct contact with the underside of each floor panel, The connecting member is fixed to each of the plurality of floor panels by fasteners while positioned at a position spaced apart from the floor beam in the second horizontal direction, thereby connecting the plurality of floor panels and integrating the plurality of floor panels.

2. 2. The floor structure according to claim 1, wherein the connecting members include a pair of first connecting members extending in the first horizontal direction and connecting adjacent connecting regions inside the regions supported by the floor beams at one end and the other end of each of the plurality of floor panels in the second horizontal direction.

3. 3. The floor structure according to claim 2, wherein the connecting member further includes a second connecting member extending in the first horizontal direction and connecting an intermediate portion between one end and the other end of each of the plurality of floor panels in the second horizontal direction.

4. A plurality of floor beams extending in a first horizontal direction and arranged at predetermined intervals in a second horizontal direction intersecting the first horizontal direction; a plurality of floor panels that straddle two adjacent floor beams and are supported by the floor beams from below while being arranged adjacent to each other in the first horizontal direction; a plurality of vibration-damping materials that elastically deform between the floor beams and the plurality of floor panels to suppress transmission of vibrations from the plurality of floor panels to the floor beams; a connecting member that connects the plurality of floor panels arranged in the first horizontal direction while abutting against the underside of each floor panel; a restricting member having a facing portion disposed below the floor beam and facing the floor beam in a plan view, and a fixing portion extending from the facing portion in a direction away from the floor beam in the second horizontal direction and fixed to the underside of the floor panel, the restricting member restricting upward movement of the floor panel relative to the floor beam; the connecting member is fixed to each of the plurality of floor panels by a fastener while being disposed at a position spaced apart from the floor beam in the second horizontal direction, thereby connecting the plurality of floor panels; A floor structure, wherein the fixing portion is fixed to the floor panel by the fastener that is common to the connecting member.

5. The floor structure according to claim 4 , wherein the connecting member has a portion that abuts against the restricting member so as to restrict rotation of the restricting member.

6. The floor structure according to any one of claims 1 to 5, wherein the connecting member has a contact portion that contacts the underside of each of the plurality of floor panels and an extension portion that extends downward from the contact portion.

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