Vibration-isolating floor structure

Abstract

To provide a vibration-isolating floor structure as a dry double floor, which is excellent in vibration-isolating performance and can easily cope with the change of wiring of a power supply or the like.SOLUTION: A vibration-isolating floor structure 1 provided on a floor frame 2 comprises a vibration-isolating material 3 provided on the floor frame, a joist 4 provided on the vibration-isolating material and extending in the horizontal direction, and a floor panel 5S provided on the joist, the floor panel is provided with an upper panel 51 and a lower panel 52 which are provided so as to overlap each other, and openings 51h, 52h are formed in the upper panel and the lower panel, respectively, and it is possible to select at any time which of a first surface 52f and a second surface 52g facing opposite sides is to be installed toward the upper panel, when the lower panel is installed so that the first surface faces the upper panel, the openings of the upper panel and the lower panel communicate in the vertical direction, and when the lower panel is installed so that the second surface faces the upper panel, the opening of the upper panel is closed by the lower panel.SELECTED DRAWING: Figure 8

Description

[Technical Field]

[0001] The present invention relates to a vibration-isolating floor structure. [Background technology]

[0002] Generally, in the floor structure of buildings used as offices, in order to improve vibration isolation performance, wet or dry floating floors are often constructed by pouring and hardening concrete or installing gypsum boards on top of cushioning materials such as rock wool or glass wool laid on top of the floor slab. Against the backdrop of efforts to reduce the amount of concrete used to reduce carbon dioxide emissions and to revitalize forestry, the use of more wooden components in office building structures is becoming more common. Furthermore, constructing wet or dry floating floors requires a great deal of effort and cost. For this reason, instead of the wet or dry floating floors described above, a dry double floor structure, often used in condominiums and other buildings, is being considered. This structure involves supporting a floor made of wood or other materials on a floating slab with support legs. However, if a dry double floor is used instead of a wet or dry floating floor, the vibration isolation performance may be reduced.

[0003] In response to this, Patent Document 1 discloses a unit panel with a thin section formed with a concave back surface, and a vibration-isolating floor structure using said unit panel. The upper parts of the joists placed on the floor slab are inserted and abut against the thin section of the unit panel. Vibration-isolating material is placed below the joists. Patent Document 1 states that this configuration can improve floor impact sound insulation.

[0004] Incidentally, in offices, the layout of the room may be changed to accommodate organizational restructuring within the company or to improve work efficiency. Changing the layout of the room involves changing the power supply and internal network wiring. When making such wiring changes, in the configuration of Patent Document 1, for example, if wiring installed under the floor is to be pulled to a new location within the room, a new opening must be created in the unit panel. Furthermore, when removing unnecessary wiring from within the room, the opening that was formed in the unit panel to allow the wiring to pass from under the floor into the room must be blocked in some way. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Publication No. 2023-104623 Summary of the Invention [Problem to be solved by the invention]

[0006] The problem that the present invention aims to solve is to provide a vibration-proof floor structure as a dry double floor that has excellent vibration-proofing performance and can easily accommodate changes to wiring such as power supplies. [Means for solving the problem]

[0007] In order to solve the above problems, the present invention employs the following means. In other words, the vibration-isolating floor structure of the present invention is a vibration-isolating floor structure that is installed on a floor frame, and comprises: vibration-isolating material installed on the floor frame; joists that are installed on the vibration-isolating material and extending horizontally; and a plurality of floor panels installed on the joists, wherein at least some of the plurality of floor panels comprise upper and lower panels that are installed on top of each other, and an opening is formed in each of the upper and lower panels, and it is possible to select at any time which of the first and second surfaces of the lower panel that face opposite each other will face the upper panel, and when the lower panel is installed so that the first surface faces the upper panel, the openings of the upper and lower panels are connected in the vertical direction, and when the lower panel is installed so that the second surface faces the upper panel, the opening of the upper panel is blocked by the lower panel. In the above-described configuration, vibration-isolating materials are provided on the floor frame, joists are provided on the vibration-isolating materials, and floor panels are further provided on the joists, thereby forming a vibration-isolating floor structure as a dry double floor. As described above, vibration-isolating materials are provided on the floor frame. Furthermore, at least some of the floor panels have multiple upper and lower panels, each of which is made up of multiple overlapping plate materials, thereby providing a configuration with effective weight for suppressing floor impact noise. In this way, excellent vibration-isolating performance can be achieved. Furthermore, in the above-described vibration-isolated floor structure, openings are formed in the upper and lower panels of at least some of the floor panels. In this configuration, when the lower panel is installed so that its first surface faces the upper panel, the openings of the upper and lower panels are vertically connected, and the opening of the upper panel is not blocked by the lower panel. This allows wiring for power, networks, etc. to be routed through these openings from the underside of the floor panel, i.e., under the floor, to the upper side of the floor panel, i.e., the interior space. If there is no need to route wiring from under the floor to the interior space, the lower panel can be installed so that its second surface, opposite to the first surface, faces the upper panel, and the opening of the upper panel can be blocked by the lower panel. In at least some of these floor panels, it is possible to select whether the lower panel is installed with its first surface or second surface facing the upper panel, and thus it is possible to select at any time whether the opening of the upper panel is unblocked or blocked by the lower panel, as described above. Therefore, if it becomes necessary to change the power supply or internal network wiring due to a change in the layout of the room, for example, this can be easily accommodated by appropriately selecting whether the opening in the upper panel is unblocked or blocked. In this way, it is possible to provide a vibration-proof floor structure as a dry double floor that has excellent vibration-proofing performance and can easily accommodate changes to wiring such as power sources.

[0008] In one aspect of the present invention, when the lower panel is installed so that the second surface faces the upper panel, a protrusion formed to protrude from the second surface fits into the opening in the upper panel from below, thereby blocking the opening in the upper panel. According to this configuration, in at least some of the floor panels in which openings are formed in the upper and lower panels, when the lower panel is installed so that the second surface faces the upper panel, the protrusion formed to protrude from the second surface fits into the opening in the upper panel from below. This causes the opening in the upper panel to be blocked by the protrusion, making it possible to prevent pedestrians from falling over due to their feet getting caught in the opening in the upper panel.

[0009] In one aspect of the present invention, among the plurality of floor panels, the other floor panels other than at least some of the floor panels also have the upper panel and the lower panel that are stacked on top of each other, and when the plurality of floor panels are arranged side by side, a spacer is provided between the upper panels of adjacent floor panels, thereby suppressing relative movement between the floor panels in the horizontal direction. According to this configuration, the floor panels other than at least some of the floor panels having openings formed in the upper and lower panels also have upper and lower panels that are stacked on top of each other, and by providing interposing materials between the upper panels of these multiple floor panels, including at least some of the floor panels and the other floor panels, relative horizontal movement between the floor panels is suppressed. Therefore, when making the floor panels unable to move horizontally, there is no need to fix them to the joists, and the floor panels can be easily attached and detached when changing wiring, etc. This makes it easy to switch between a state in which the openings in the upper and lower panels are not blocked by the lower panel and a state in which they are blocked, for example, by removing at least some of the floor panels having openings formed in the upper and lower panels.

[0010] In one aspect of the present invention, each of the upper panel and the lower panel is made of wood, and the upper panel and the lower panel are joined together by wood screws. With this configuration, for example, when removing at least some of the floor panels having openings formed in the upper and lower panels and switching the opening in the upper panel between a state where it is not blocked by the lower panel and a state where it is blocked, the lower panel can be easily released from and re-attached to the upper panel.

[0011] In one aspect of the present invention, a plurality of the joists are arranged in rows with their axial direction aligned in a first direction extending in a horizontal plane, and the rows of the joists are arranged in a plurality of rows spaced apart in a second direction perpendicular to the first direction in the horizontal plane, and adjacent joists in the first direction are spaced apart from each other, and the plurality of joists are arranged so that the spaces formed between adjacent joists in the first direction are staggered when viewed in a plan view. According to this configuration, by arranging a plurality of joists in a row in the first direction, the axial length of each joist can be shortened. This makes it easy to transport and handle the joists during construction, facilitating construction. Furthermore, when wiring is required to span the row of joists under the floor, it can be easily done by passing the wiring through the space formed between adjacent joists in the first direction. In particular, by arranging the spaces between adjacent joists in a staggered pattern in a plan view, the spaces between adjacent joists in the first direction are dispersed rather than concentrated locally, which improves the degree of freedom when wiring through the spaces between the joists. Furthermore, if the support points that support multiple floor panels on the floor frame via multiple joists and vibration-damping materials were aligned in a straight line in a plan view, vibrations could be amplified if the antinodes of a vibration mode that occur when the floor is vibrated by walking or jogging coincide with the support points. In contrast, in the above configuration, the spaces formed between adjacent joists in the first direction are arranged in a staggered pattern in a plan view, so that the support points are dispersed rather than concentrated locally. This makes it less likely that the multiple support points will coincide with the antinodes of the vibration mode, thereby suppressing vibration amplification.

[0012] In one aspect of the present invention, among the plurality of floor panels, the other floor panels other than at least some of the floor panels also have the upper panel and the lower panel stacked on top of each other, and in each of the plurality of floor panels, the upper panel is formed to a size such that, when placed on the joist, the end edges located opposite each other in the second direction are positioned on the joist in the adjacent row in the second direction, and the lower panel is formed so that its length in the second direction is smaller than that of the upper panel and is joined to the upper panel, and when the plurality of floor panels are arranged in the second direction so that the upper panels are close to each other, a gap greater than or equal to the width of the joist is formed between the lower panels of adjacent floor panels, and the joist is accommodated in the gap. According to this configuration, the other floor panels other than at least some of the floor panels having openings formed in the upper and lower panels also have upper and lower panels that are stacked on top of each other, and in each of the multiple floor panels including at least some of the floor panels and the other floor panels, the upper and lower panels are formed small so that they are approximately the same size as the spacing between the joists in the second direction. This makes it easy to transport the floor panels and to remove at least some of the floor panels having openings formed in the upper and lower panels to switch between a state in which the opening in the upper panel is not blocked by the lower panel and a state in which it is blocked. Furthermore, because the joists are housed between the lower panels, the edges of the lower panels butt against the joists from the sides, preventing the floor panels from moving relative to the joists. This eliminates the need to fasten the floor panels to the joists, making construction easier. [Effects of the Invention]

[0013] According to the present invention, it is possible to provide a vibration-proof floor structure as a dry double floor that has excellent vibration-proofing performance and can easily accommodate changes to wiring such as power supplies. [Brief explanation of the drawings]

[0014] [Figure 1] 1 is a plan view showing the configuration of an anti-vibration floor structure according to an embodiment of the present invention. [Figure 2] FIG. 2 is a cross-sectional view of FIG. [Figure 3] FIG. 2 is a plan view showing an example of the arrangement of joists in the vibration-isolation floor structure of FIG. 1. [Figure 4] FIG. 2 is a plan view showing a floor panel of the vibration-isolating floor structure of FIG. 1. [Figure 5] FIG. 2 is a cross-sectional view taken along the line II-II in FIG. [Figure 6] FIG. 2 is a diagram of a floor panel having an opening formed therein in the vibration-isolating floor structure of FIG. 1, seen from above, showing the state in which the opening in the upper panel and the opening in the lower panel are connected. [Figure 7] FIG. 7 is a view of the floor panel of FIG. 6 as seen from below. [Figure 8] FIG. 7 is a cross-sectional view taken along the line III-III in FIG. 6. [Figure 9] FIG. 7 is a cross-sectional view taken along the line IV-IV in FIG. 6. [Figure 10] 2 is a diagram of a floor panel having an opening formed therein in the vibration-isolating floor structure of FIG. 1, seen from above, showing the state in which the protrusion of the lower panel is fitted into the opening of the upper panel. FIG. [Figure 11] FIG. 11 is a view of the floor panel of FIG. 10 as seen from below. [Figure 12] FIG. 11 is a cross-sectional view taken along the arrows VV in FIG. [Figure 13] FIG. 11 is a cross-sectional view taken along the line VI-VI in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0015] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, with reference to the accompanying drawings, an embodiment for carrying out a vibration-isolating floor structure according to the present invention will be described based on the drawings. A plan view showing the configuration of a vibration-isolating floor structure according to an embodiment of the present invention is shown in Figure 1. In Figure 1, some of the floor panels (the lower ones in Figure 1) have been removed to reveal the floor joists and floor framework. Figure 2 is a cross-sectional view taken along line II of Figure 1. As shown in Figure 1, the vibration-isolating floor structure 1 is installed on a floor frame 2 of a building. The floor frame 2 forms the floor of each floor of the building and is made of, for example, a concrete slab. The vibration-isolating floor structure 1 includes vibration-isolating materials 3 (see Figure 2), joists 4, and a plurality of floor panels 5. The vibration-isolating material 3 is provided on the floor framework 2. The vibration-isolating material 3 is interposed between the floor framework 2 and joists 4, which will be described later. The vibration-isolating material 3 suppresses the propagation of vibration from the floor panels 5 and joists 4 to the floor framework 2. For example, the vibration-isolating material 3 can be made of rubber-based materials such as special foamed urethane, vibration-isolating rubber sheets, glass wool, leaf springs, etc. In this embodiment, the vibration-isolating material 3 is made of special foamed urethane. There are no limitations on the material of the vibration-isolating material 3, as long as it can obtain the required vibration-damping characteristics.

[0016] The joists 4 are provided on the vibration-proofing material 3. In this embodiment, a plurality of joists 4 are arranged. FIG. 3 is a plan view showing an example of the arrangement of joists in the vibration-isolating floor structure of FIG. The joists 4 are provided to extend in the horizontal direction. As shown in FIG. 3, in this embodiment, each of the plurality of joists 4 is provided so that its axial direction, which is the direction in which the joists 4 extend, is aligned with a first direction D1 extending in a horizontal plane. Each joist 4 is made of wood. The joists 4 are made of, for example, Kruin wood (specific gravity 0.8 kg / m 3 It is preferable to use wood with a high specific gravity, such as laminated wood or LVL (Laminated Veneer Lumber). The plurality of joists 4 are arranged in series to form a row along the first direction D1. A plurality of rows 4L each consisting of a plurality of joists 4 arranged in series along the first direction D1 are arranged at intervals in a second direction D2 that is perpendicular to the first direction D1 in a horizontal plane.

[0017] In each row 4L, adjacent joists 4 in the first direction D1 are spaced apart from each other. In each row 4L, a space S having a predetermined dimension in the first direction D1 is formed between adjacent joists 4 in the first direction D1. Rows 4L adjacent to each other in the second direction D2 are arranged such that the positions of the spaces S differ from each other in the first direction D1. Specifically, of the rows 4L adjacent to each other in the second direction D2, the space S in one row 4L is arranged to correspond to the axial middle portion of each joist 4 constituting the other row 4L in the first direction D1. In this way, the spaces S of the multiple joists 4 arranged across the multiple rows 4L are arranged in a staggered pattern when viewed in plan. Vibration-damping materials 3 are arranged below both axial ends of each joist 4 arranged in this manner. That is, each joist 4 is supported from below by a pair of vibration-damping materials 3 arranged at both ends in the extension direction. The vibration-damping materials 3 may be arranged, for example, at the center in the axial direction, in addition to both axial ends of the joists 4. In this way, since the space S is arranged in a staggered manner when viewed from above, the vibration-damping materials 3 supporting each joist 4 are also arranged in a staggered manner when viewed from above.

[0018] A plurality of floor panels 5 are provided on the joists 4. Each floor panel 5 is formed in a rectangular shape when viewed from above. In this embodiment, each floor panel 5 is formed in a square shape when viewed from above. Each floor panel 5 may also be formed in a rectangular shape when viewed from above. Fig. 4 is a plan view showing a floor panel of the vibration-isolating floor structure of Fig. 1. Fig. 5 is a cross-sectional view taken along the line II-II of Fig. 4. As shown in FIGS. 2, 4 and 5, each floor panel 5 includes an upper panel 51 and a lower panel 52 that are stacked on top of each other.

[0019] In this embodiment, the multiple floor panels 5 include at least some floor panels 5S having openings 51h, 52h formed therein, which will be described in detail later as wiring floor panels 5S, and other (normal) floor panels 5 having no openings 51h, 52h formed therein. Each of these at least some floor panels 5S having openings 51h, 52h formed therein and the other floor panels 5 has a common configuration including an upper panel 51 and a lower panel 52 that are stacked on top of each other. Furthermore, in at least some of the floor panels 5S and the other floor panels 5, the area, thickness, and material of the upper panel 51 and the lower panel 52 are the same when viewed in a plan view. Therefore, in the following, the upper panel 51 and the lower panel 52 will be described using other (normal) floor panels 5 in which the openings 51h, 52h are not formed, and then at least some of the floor panels 5S in which the openings 51h, 52h are formed will be described. Note that in the following description, when simply referring to floor panel 5, this also includes at least some of the floor panels 5S in which the openings 51h, 52h are formed. Each of the upper panel 51 and the lower panel 52 is made of wood. More specifically, the upper panel 51 and the lower panel 52 are made of, for example, particle board.

[0020] The upper panel 51 is placed on the joists 4. The upper panel 51 is formed to a size such that, when placed on the joists 4, the end sides 51s positioned opposite each other in the second direction D2 are positioned on the joists 4 of the adjacent row 4L in the second direction D2. The lower panel 52 is provided along the lower surface of the upper panel 51. The lower panel 52 is joined to the upper panel 51. The upper panel 51 and the lower panel 52 are detachably joined together by, for example, wood screws 58. The lower panel 52 is formed so that the length in the second direction D2 is smaller than that of the upper panel 51. The lower panel 52 is formed so that the length in the first direction D1 is equal to that of the upper panel 51. The lower panel 52 may be formed so that the length in the first direction D1 is smaller than that of the upper panel 51. As shown in Figures 2 and 4, the lower panel 52 is disposed between the joists 4 of adjacent rows 4L in the second direction D2. As shown in Figure 2, when a plurality of floor panels 5 are arranged in the second direction D2 such that the upper panels 51 are close to each other, a gap greater than or equal to the width of the joist 4 is formed between the lower panels 52 of adjacent floor panels 5, and the joist 4 is accommodated in this gap. Ends 52s of the lower panels 52 located on opposite sides in the second direction D2 abut from the sides against the joists 4 of adjacent rows 4L in the second direction D2, thereby preventing the floor panels 5 from shifting in position in the second direction D2.

[0021] The multiple floor panels 5 as described above divide the space within the building above the floor structure 2 into an interior space UI above the floor panels 5 and an underfloor space DI below the floor panels 5. The underfloor DI is provided with wiring 100 for a power supply, an internal network, and the like.

[0022] Next, at least a part of the floor panel 5S in which the openings 51h and 52h are formed will be described. 1, at least some of the floor panels 5S among the plurality of floor panels 5 have openings 51h and 52h formed in the upper panel 51 and the lower panel 52, respectively. Note that all of the plurality of floor panels 5 may be floor panels 5S having the openings 51h and 52h. Fig. 6 is a view from above of a floor panel having an opening formed therein in the vibration-isolated floor structure of Fig. 1, showing a state in which the opening of the upper panel is connected to the opening of the lower panel. Fig. 7 is a view from below of the floor panel of Fig. 6. Fig. 8 is a cross-sectional view taken along the line III-III in Fig. 6. Fig. 9 is a cross-sectional view taken along the line IV-IV in Fig. 6. In the floor panel 5S as shown in Figures 6 to 9, the openings 51h, 52h are provided to pass the wiring 100 between the underside of the floor panel 5S, i.e., the underfloor DI, and the upper side, i.e., the interior space UI. Therefore, for ease of explanation, at least some of the floor panels 5S in which the openings 51h, 52h are formed will hereinafter be referred to as wiring floor panels 5S as appropriate.

[0023] As shown in Figures 6 to 9, an opening 51h is formed in the upper panel 51 of the wiring floor panel 5S, penetrating it from top to bottom. The opening 51h is, for example, rectangular in plan view. The opening 51h is not limited to a rectangular shape in plan view, and may be a polygonal shape other than a rectangle, a circle, or the like. The opening 51h is formed in a position offset to one side in the first direction D1 with respect to the center of the upper panel 51 in the first direction D1.

[0024] In the wiring floor panel 5S, it is possible to select at any time which of the first surface 52f and the second surface 52g, which face opposite each other, of the lower panel 52 to be installed facing the upper panel 51. By appropriately attaching and detaching the wood screws 58 that join the upper panel 51 and the lower panel 52, the lower panel 52 can be switched between a state in which the lower panel 52 is installed so that the first surface 52f faces the upper panel 51, as shown in Figures 6 to 9, and a state in which the lower panel 52 is installed so that the second surface 52g faces the upper panel 51, as will be described later (see Figures 12 and 13).

[0025] In the wiring floor panel 5S, an opening 52h is formed in the lower panel 52. The opening 52h is formed by penetrating the lower panel 52 from top to bottom. The opening 52h has the same shape and size in a plan view as the opening 51h. In this embodiment, the opening 52h is rectangular in a plan view. The opening 52h is formed at a position that communicates with the opening 51h of the upper panel 51 in the vertical direction when the lower panel 52 is installed so that the first surface 52f faces the upper panel 51 and abuts against the upper panel 51. The lower panel 52 has a protrusion 55. The protrusion 55 is provided on a second surface 52g of the lower panel 52. The protrusion 55 protrudes from the second surface 52g in the direction opposite to the first surface 52f. The protrusion 55 has the same shape and size in a plan view as the openings 51h, 52h. As shown in FIG. 9 , the protrusion 55 has the same thickness t and protrusion height h as the upper panel 51. The protrusion 55 is provided at a position symmetrical to the opening 52h in the first direction D1, across the center of the lower panel 52 in the first direction D1. In this way, when the lower panel 52 is installed with its first surface 52f facing the upper panel 51 so that the openings 51h, 52h of the upper panel 51 and the lower panel 52 are connected to each other, a portion of the wiring 100 provided in the underfloor DI, i.e., below the floor panel 5, can be pulled out above the floor panel 5, i.e., into the interior space UI, through the openings 51h, 52h.

[0026] Fig. 10 is a view from above of a floor panel with an opening formed in the vibration-isolating floor structure of Fig. 1, showing a state in which the protrusion of the lower panel is fitted into the opening of the upper panel. Fig. 11 is a view from below of the floor panel of Fig. 10. Fig. 12 is a cross-sectional view taken along the arrows VV in Fig. 10. Fig. 13 is a cross-sectional view taken along the arrows VI-VI in Fig. 10. 10 to 13, when the lower panel 52 is installed in the wiring floor panel 5S so that the second surface 52g faces the upper panel 51 and abuts against the upper panel 51, the lower panel 52 is turned upside down in the first direction D1 from the state shown in FIGS. 6 to 9 where the lower panel 52 is installed so that the first surface 52f faces the upper panel 51. As a result, the protrusion 55 of the lower panel 52 fits into the opening 51h of the upper panel 51 from below, and the opening 51h of the upper panel 51 is blocked by the lower panel 52 (the protrusion 55). In this way, by installing the lower panel 52 with the second surface 52g facing the upper panel 51 so that the protrusion 55 fits into the opening 51h of the upper panel 51, the openings 51h and 52h can be blocked when there is no need to pull the wiring 100 provided in the underfloor DI, i.e., below the floor panel 5, above the floor panel 5, i.e., into the interior space UI.

[0027] When changing from a state in which the lower panel 52 is installed so that the first surface 52f faces the upper panel 51 to a state in which the lower panel 52 is installed so that the second surface 52g faces the upper panel 51, the wood screws 58 are removed, the lower panel 52 is removed from the upper panel 51, the lower panel 52 is turned upside down in the first direction D1, and the lower panel 52 is installed so that the second surface 52g faces the upper panel 51 so that the protrusion 55 fits into the opening 51h of the upper panel 51, and then the lower panel 52 is again joined to the upper panel 51 using the wood screws 58. Similarly, when changing from a state in which the lower panel 52 is installed so that the second surface 52g faces the upper panel 51 to a state in which the lower panel 52 is installed so that the first surface 52f faces the upper panel 51, the wood screws 58 are removed, the lower panel 52 is removed from the upper panel 51, the lower panel 52 is turned over in the first direction D1, and the lower panel 52 is installed so that the first surface 52f faces the upper panel 51 so that the openings 51h, 52h of the upper panel 51 and the lower panel 52 are connected to each other, and then the lower panel 52 is again joined to the upper panel 51 with the wood screws 58.

[0028] As shown in Fig. 1, when a plurality of floor panels 5 are arranged side by side, an interposing material 8 is provided between the upper panels 51 of adjacent floor panels 5. For example, when the upper panel 51 of a certain floor panel 5 is arranged so as to be adjacent to the upper panel 51 of another floor panel 5 in only one of the first direction D1 or the second direction D2 at a corner of the upper panel 51, an interposing material 8A that is T-shaped in plan view is provided at the portion where the corners of these upper panels 51 butt together so as to cover both corners of these two upper panels 51 from the sides. Furthermore, for example, when the upper panel 51 of a certain floor panel 5 is arranged adjacent to the upper panel 51 of another floor panel 5 in each of the first direction D1, the second direction D2, and the diagonal direction at the corner of the upper panel 51, a cross-shaped intervening material 8B is provided in the area where the corners of these upper panels 51 butt together so as to cover all of the corners of these four upper panels 51 from the sides. As shown in FIG. 2, the interposing material 8 is provided on the joist 4. A friction material having a certain or higher coefficient of friction, such as a rubber-based material, can be used as the interposing material 8. The interposing material 8 is sandwiched between the outer peripheral end faces of adjacent upper panels 51. The interposing material 8 can suppress relative displacement between the floor panels 5 in the direction in which the floor panels 5 are adjacent to each other in the horizontal plane and in the direction perpendicular to the direction in which the floor panels 5 are adjacent to each other in the horizontal plane, due to the frictional force generated between the interposing material 8 and the outer peripheral end face of the adjacent upper panel 51, and the frictional force generated between the lower end of the interposing material 8 and the upper surface of the joist 4, etc.

[0029] Furthermore, a finishing material 7 such as tile carpet, flooring, or the like is laid on top of the plurality of floor panels 5. When openings 51h, 52h of upper panel 51 and lower panel 52 are connected to each other and wiring 100 is passed through openings 51h, 52h as shown in Figures 8 and 9, it is preferable to appropriately provide cuts, slits, or the like in portions of finishing material 7 near openings 51h, 52h to pass wiring 100 inserted through openings 51h, 52h into the indoor space UI.

[0030] The vibration-isolating floor structure 1 as described above is a vibration-isolating floor structure 1 provided on a floor skeleton 2, and includes vibration-isolating materials 3 provided on the floor skeleton 2, joists 4 provided on the vibration-isolating materials 3 and extending in the horizontal direction (first direction D1), and a plurality of floor panels 5 provided on the joists 4, and at least a portion of the plurality of floor panels 5 (wiring floor panels 5S) includes an upper panel 51 and a lower panel 52 provided on top of each other, and the upper panel 51 and the lower panel 52 each have an opening 51h, 52h is formed, and it is possible to select at any time whether the lower panel 52 will be installed with its first surface 52f or its second surface 52g, which face opposite each other, facing the upper panel 51. When the lower panel 52 is installed so that its first surface 52f faces the upper panel 51, the openings 51h, 52h of the upper panel 51 and the lower panel 52 are connected in the vertical direction, and when the lower panel 52 is installed so that its second surface 52g faces the upper panel 51, the opening 51h of the upper panel 51 is blocked by the lower panel 52. In the above-described configuration, vibration-isolating materials 3 are provided on the floor framework 2, joists 4 are provided on the vibration-isolating materials 3, and floor panels 5 are further provided on the joists 4, thereby forming a vibration-isolating floor structure 1 as a dry double floor. As described above, the vibration-isolating materials 3 are provided on the floor framework 2. Furthermore, the floor panel 5S is made up of multiple plates, an upper panel 51 and a lower panel 52, which are stacked on top of each other, thereby providing a configuration with an effective weight for suppressing floor impact noise. In this way, excellent vibration-isolating performance can be achieved. Furthermore, in the above-described vibration-isolated floor structure 1, openings 51h and 52h are formed in the upper panel 51 and the lower panel 52 of at least some of the floor panels 5S, respectively. In this configuration, when the lower panel 52 is installed so that the first surface 52f faces the upper panel 51, the openings 51h and 52h of the upper panel 51 and the lower panel 52 communicate in the vertical direction, and the opening 51h of the upper panel 51 is not blocked by the lower panel 52. For this reason, wiring 100 for power supply, networks, etc. can be passed through these openings 51h and 52h from the underside of the floor panel 5S, i.e., the underfloor DI, to the upper side of the floor panel 5S, i.e., the indoor space UI. When there is no need to run the wiring 100 from the underfloor DI to the interior space UI, the lower panel 52 can be installed so that the second surface 52g opposite to the first surface 52f faces the upper panel 51, and the opening 51h of the upper panel 51 is blocked by the lower panel 52. In at least some of the floor panels 5S, it is possible to select at any time whether the lower panel 52 is installed with the first surface 52f or the second surface 52g facing the upper panel 51, and the above-mentioned state in which the opening 51h of the upper panel 51 is blocked by the lower panel 52 can be selected at any time. Therefore, when it becomes necessary to change the wiring 100 for the power supply or the internal network due to a change in the interior layout, for example, this can be easily accommodated by appropriately selecting whether the opening 51h of the upper panel 51 is blocked or not. In this way, it is possible to provide a vibration-proof floor structure 1 as a dry double floor that has excellent vibration-proofing performance and can easily accommodate changes to the wiring 100 for the power supply, etc.

[0031] Furthermore, when the lower panel 52 is installed so that the second surface 52g faces the upper panel 51, the protrusion 55 formed to protrude from the second surface 52g fits into the opening 51h of the upper panel 51 from below, thereby blocking the opening 51h of the upper panel 51. According to this configuration, in at least some of the floor panels 5S (wiring floor panels 5S) in which the openings 51h, 52h are formed in the upper panel 51 and the lower panel 52, when the lower panel 52 is installed so that the second surface 52g faces the upper panel 51, the protrusion 55 formed to protrude from the second surface 52g fits from below into the opening 51h of the upper panel 51. As a result, the opening 51h of the upper panel 51 is blocked by the protrusion 55, making it possible to prevent pedestrians from tripping over the opening 51h of the upper panel 51, etc.

[0032] Furthermore, among the multiple floor panels 5, the other floor panels 5, other than at least some of the floor panels 5S (wiring floor panels 5S), also have upper panels 51 and lower panels 52 that are stacked on top of each other, and when multiple floor panels 5 (including wiring floor panels 5S) are arranged side by side, interposing material 8 is provided between the upper panels 51 of adjacent floor panels 5, thereby suppressing relative movement between the floor panels 5 in the horizontal direction. According to this configuration, the floor panels 5 other than at least some of the floor panels 5S having openings 51h, 52h formed in the upper panel 51 and the lower panel 52 also have upper panels 51 and lower panels 52 stacked on top of each other, and by providing interposition material 8 between the upper panels 51 of the multiple floor panels 5 including at least some of the floor panels 5S and the other floor panels 5, relative movement in the horizontal direction between the floor panels 5 is suppressed. Therefore, when making the floor panels 5 immovable in the horizontal direction, it is no longer necessary to fix them to the joists 4, and the floor panels 5 can be easily attached and detached during wiring change work, etc. This makes it easy to switch between a state in which the opening 51h of the upper panel 51 is not blocked by the lower panel 52 and a state in which it is blocked, for example, by removing at least some of the floor panels 5S having openings 51h, 52h formed in the upper panel 51 and the lower panel 52.

[0033] The upper panel 51 and the lower panel 52 are each made of wood, and are joined together by wood screws 58 . With this configuration, for example, when removing at least a portion of the floor panel 5S (wiring floor panel 5S) having openings 51h and 52h formed in the upper panel 51 and the lower panel 52, and switching the opening 51h in the upper panel 51 between a state in which it is not blocked by the lower panel 52 and a state in which it is blocked, the lower panel 52 can be easily released from and re-joined to the upper panel 51.

[0034] In addition, a plurality of joists 4 are arranged in rows with their axial direction along a first direction D1 extending in a horizontal plane, and the rows of joists 4 are arranged at intervals in a second direction D2 perpendicular to the first direction D1 in the horizontal plane, with adjacent joists 4 spaced apart in the first direction D1, and the plurality of joists 4 are arranged so that the spaces S formed between adjacent joists 4 in the first direction D1 are staggered when viewed in a plane. According to this configuration, by arranging a plurality of joists 4 in a row in the first direction D1, the axial length of each joist 4 can be shortened. This makes it easy to transport and handle the joists 4 during construction, facilitating construction. Furthermore, when wiring 100 needs to be run across the row 4L of joists 4 under the floor DI, as shown in FIG. 1, the wiring 100 can be easily run by passing it through the space S formed between adjacent joists 4 in the first direction D1. In particular, by arranging the spaces S formed between adjacent joists 4 in the first direction D1 in a staggered pattern when viewed in plan, the spaces S formed between adjacent joists 4 in the first direction D1 are not locally concentrated but are dispersed. This improves the degree of freedom when routing the wiring 100 through the spaces S formed between the joists 4. Furthermore, if the support points that support the multiple floor panels 5 on the floor frame 2 via the multiple joists 4 and vibration-damping materials 3 were aligned in a straight line in a plan view, vibrations could be amplified if the antinodes of a vibration mode that occur when the floor is vibrated by walking or jogging coincide with the support points. In contrast, in the above configuration, the spaces S formed between adjacent joists 4 in the first direction D1 are arranged in a staggered pattern in a plan view, so that the support points are not locally concentrated but are dispersed. This makes it less likely that the multiple support points will coincide with the antinodes of the vibration mode, thereby suppressing vibration amplification.

[0035] Furthermore, among the multiple floor panels 5, the other floor panels 5, other than at least some of the floor panels 5S (wiring floor panels 5S), also have upper panels 51 and lower panels 52 stacked on top of each other, and in each of the multiple floor panels 5 (including the wiring floor panels 5S), the upper panel 51 is formed to a size such that, when placed on top of the joists 4, the end edges 51s located opposite each other in the second direction D2 are positioned on top of the joists 4 in the adjacent row 4L in the second direction D2, and the lower panel 52 is formed to have a length in the second direction D2 that is shorter than that of the upper panel 51 and is joined to the upper panel 51, and when the multiple floor panels 5 are placed side by side in the second direction D2 so that the upper panels 51 are close to each other, a gap greater than or equal to the width of the joists 4 is formed between the lower panels 52 of adjacent floor panels 5, and the joists 4 are accommodated in the gap. According to this configuration, the floor panels 5 other than at least some of the floor panels 5S in which the openings 51h, 52h are formed in the upper panel 51 and the lower panel 52 also have the upper panel 51 and the lower panel 52 stacked on top of each other, and in each of the multiple floor panels 5 including at least some of the floor panels 5S and the other floor panels 5, the upper panel 51 and the lower panel 52 are formed small so that the size is approximately the same as the spacing between the joists 4 in the second direction D2. This makes it easy to transport the floor panels 5 and to remove at least some of the floor panels 5S in which the openings 51h, 52h are formed in the upper panel 51 and the lower panel 52, thereby easily switching between a state in which the opening 51h of the upper panel 51 is unblocked and a state in which it is blocked by the lower panel 52. Furthermore, because the joists 4 are housed between the lower panels 52, the ends 52s of the lower panels 52 abut against the joists 4 from the sides, thereby preventing the floor panels 5 from moving relative to the joists 4. This eliminates the need to fix the floor panels 5 to the joists 4, making construction easier.

[0036] The vibration-isolating floor structure of the present invention is not limited to the above-described embodiment explained with reference to the drawings, and various modifications are possible within the technical scope. For example, in the above embodiment, the opening 52h and the protrusion 55 of the lower panel 52 are arranged symmetrically with respect to the center of the lower panel 52 in the first direction D1, but this is not limited to this. The opening 52h and the protrusion 55 of the lower panel 52 may be arranged symmetrically with respect to the center of the lower panel 52 in the second direction D2. In this case, when the orientation of the first surface 52f and the second surface 52g of the lower panel 52 is reversed and the lower panel 52 is installed facing the upper panel 51, the lower panel 52 is turned upside down in the second direction D2. Furthermore, in the above embodiment, the protrusion 55 is provided on the lower panel 52, and when the lower panel 52 is installed so that the second surface 52g faces the upper panel 51, the protrusion 55 fits into the opening 51h of the upper panel 51 from below. However, this is not limited to this. For example, the lower panel 52 may be configured without the protrusion 55. When the lower panel 52 is installed so that the second surface 52g faces the upper panel 51, the second surface 52g of the lower panel 52 closes the opening 51h of the upper panel 51 from below. In this case, a closing member that closes the opening 51h of the upper panel 51 may be fitted into the opening 51h from above.

[0037] In the above embodiment, the floor panel 5 is configured by stacking the upper panel 51 and the lower panel 52, but it may also be configured by stacking three or more panels. When configuring the wiring floor panel 5S by stacking three or more panels, openings will be provided in all of the stacked panels as appropriate. Furthermore, in floor panels 5 other than the wiring floor panel 5S, there is no need to detachably join the lower panel 52 to the upper panel 51. Therefore, in floor panels 5 other than the wiring floor panel 5S, the lower panel 52 may be fixed to the upper panel 51 with nails, adhesive, or the like, instead of wood screws. In addition, the configurations given in the above embodiments can be selected or changed as appropriate without departing from the spirit of the present invention. [Explanation of symbols]

[0038] 1 Anti-vibration floor structure 51s edge 2 Floor frame 52 Lower panel 3 Vibration isolation material 52f 1st surface 4 Joist 52g Second Surface 4L row 52h opening 5 Floor panel 55 Protrusion 5S Wiring floor panel (at least part of the floor panel) 58 Wood screws 8, 8A, 8B Intermediate material D1 1st direction 51 Upper panel D2 Second direction 51h Opening S space

Claims

1. A vibration-isolating floor structure provided on a floor frame, a vibration-isolating material provided on the floor structure; A joist provided on the vibration-proof material and extending horizontally; A plurality of floor panels provided on the floor joists; Equipped with At least some of the floor panels include an upper panel and a lower panel that are stacked on top of each other, and openings are formed in the upper panel and the lower panel, respectively. The lower panel can be configured to have either a first surface or a second surface facing in opposite directions facing the upper panel, and the first surface or the second surface facing in opposite directions facing the upper panel can be selected at any time. When the lower panel is installed so that the first surface faces the upper panel, the openings of the upper panel and the lower panel communicate with each other in the vertical direction, When the lower panel is installed so that the second surface faces the upper panel, the opening of the upper panel is closed by the lower panel. A vibration-proof floor structure characterized by:

2. When the lower panel is installed so that the second surface faces the upper panel, a protrusion formed to protrude from the second surface fits into the opening of the upper panel from below, thereby closing the opening of the upper panel.

2. The vibration-isolating floor structure according to claim 1.

3. Among the plurality of floor panels, the other floor panels other than the at least some of the floor panels also include the upper panel and the lower panel provided on top of each other, When a plurality of floor panels are arranged side by side, a spacer is provided between the upper panels of adjacent floor panels, thereby suppressing relative movement between the floor panels in the horizontal direction.

3. The vibration-isolating floor structure according to claim 1 or 2.

4. each of the upper panel and the lower panel is made of wood; The upper panel and the lower panel are joined together with wood screws.

3. The vibration-isolating floor structure according to claim 1 or 2.

5. The plurality of joists are arranged in rows with their axial direction along a first direction extending in a horizontal plane, and the rows of joists are arranged at intervals in a second direction perpendicular to the first direction in the horizontal plane, The joists adjacent to each other in the first direction are spaced apart from each other, and the joists are arranged so that spaces formed between the joists adjacent to each other in the first direction are arranged in a staggered pattern when viewed in a plan view.

3. The vibration-isolating floor structure according to claim 1 or 2.

6. Among the plurality of floor panels, the other floor panels other than the at least some of the floor panels also include the upper panel and the lower panel provided on top of each other, In each of the plurality of floor panels, The upper panel is formed to a size such that, when the upper panel is installed on the joist, end sides located opposite each other in the second direction are located on the joists of the row adjacent in the second direction, the lower panel is formed to have a length in the second direction smaller than that of the upper panel and is joined to the upper panel; When the plurality of floor panels are arranged in the second direction so that the upper panels are adjacent to each other, a gap equal to or greater than the width of the joist is formed between the lower panels of adjacent floor panels, and the joist is accommodated in the gap.

6. The vibration-isolating floor structure according to claim 5.

Images