JP5824445B2 - Floor structure - Google Patents

Description

The present invention relates to a floor structure .

  In a house, the floor material on the upper floor vibrates and the ceiling material on the lower floor vibrates, resulting in noise in the room on the lower floor. Therefore, in order to reduce the floor vibration of the upper floor, for example, JP-A-2001-49781 (Patent Document 1) and JP-A-2010-230031 (Patent Document 2) describe a damper device.

JP 2001-49781 A JP 2010-230031 A

  Patent Document 1 describes that a damper device is attached to a structural material such as joists. A structural material is a framework for building a building. If the damper device is attached to the structural material, the structural material itself is less likely to vibrate, and thus the vibration of the flooring cannot be sufficiently suppressed.

  In addition, as in Patent Document 2, when the damper device is directly attached to the floor material, the floor material needs a holding strength enough to fix the damper device. However, since the flooring material does not have sufficient holding strength, it is not easy to attach the damper device directly to the flooring material in order to increase the mass of the mass member of the damper device particularly in order to enhance the vibration suppressing effect.

This invention is made | formed in view of such a situation, and it aims at providing the floor structure which can improve the vibration suppression effect of a flooring .

The floor structure according to this means includes a structural frame in which a plurality of horizontal structural members are connected, a floor material fixed to the upper surface of the structural frame, and a horizontal direction from the horizontal structural body in a region surrounded by the structural frame. attached to the floor member in a state spaced, and auxiliary fixing member which is formed by solid material not constituting the framework of a highly rigid than flooring and building, attached to the auxiliary fixing member, to suppress the vibration of the flooring A leaf spring type damper device.

Here, the structural material is a framework for constructing a building, and the non-structural material is a member that is not a framework. The leaf spring type damper device is not directly attached to the floor material, but is attached to an auxiliary fixing material which is a non-structural material and has higher rigidity than the floor material. Therefore, even if the floor material does not have sufficient holding strength, the leaf spring type damper device can be reliably fixed to the auxiliary fixing material. Moreover, even when the mass of the mass member of the leaf spring type damper device is increased, the damper device can be reliably fixed. Further, the auxiliary fixing material, which is a non-structural material, vibrates integrally with the floor material unlike structural materials such as beams and joists. Then, the surface vibration of the flooring can be reliably reduced by attaching the leaf spring type damper device to the auxiliary fixing member that vibrates with the flooring instead of the structural material such as joist which does not vibrate together with the flooring.
Further, the auxiliary fixing material is attached to the floor material in a state of being separated from the horizontal structure material in the horizontal direction. Thereby, the auxiliary fixing material vibrates integrally with the floor material independently of the horizontal structure material. Therefore, it is possible to reliably reduce the surface vibration of the flooring material caused by the leaf spring type damper device.
Further, the auxiliary fixing material is formed of a solid material. That is, the auxiliary fixing material is not a laminated material but a solid material. As a result, when the damper device is attached to the auxiliary fixing material, the force for holding the damper device by the auxiliary fixing material can be sufficiently increased. Therefore, the vibration suppressing effect can be stably exhibited.
The leaf spring type damper device includes first and second leaf spring type damper devices having different vibration suppression frequencies, and the plurality of first leaf spring type damper devices are staggered with respect to the flooring material. The plurality of second leaf spring type damper devices are arranged in a staggered pattern at a position where the first leaf spring type damper device is not arranged with respect to the flooring. The second leaf spring type damper device is arranged in a lattice shape.
Since the frequency bands of the two types of leaf spring damper devices are different, vibrations in a wide frequency band can be effectively suppressed. Furthermore, by arranging in a staggered pattern, it is possible to exhibit vibration suppression effects in a wide frequency band evenly and evenly on the flooring.

In addition, the floor structure includes a plurality of floor materials fixed to the upper surface of the structural frame and arranged with their edges butted against each other, and the auxiliary fixing material connects the butted portions of the plurality of floor materials. May be. In this way, by connecting the plurality of floor materials to be abutted by the auxiliary fixing material, the plurality of floor materials vibrates as an integral surface material. That is, the vibration mode of each flooring is the same without causing a shift in the butted portion of each flooring. Therefore, the vibrations of the plurality of floor members connected by the auxiliary fixing material are reliably reduced by the leaf spring type damper device attached to the auxiliary fixing material.

Moreover, an auxiliary | assistant fixing material is not restricted to the case where the butt | matching part of a some flooring is connected as mentioned above, You may be made as follows. That is, the floor structure includes a plurality of floor materials that are fixed to the upper surface of the structural frame and are arranged with their edges butting each other, and the auxiliary fixing material is located at a position where the butted portions of the plurality of floor materials are removed. Yes, it may be attached to a single flooring. In this case, the construction becomes easy and the vibration suppressing effect on the individual floor material is surely exhibited.

  In addition, in the above, the auxiliary fixing material may be formed in a flat plate shape, and may be attached to the floor material so as to overlap each other in the thickness direction of the floor material and the auxiliary fixing material. Here, the flat shape means a thin and flat shape. That is, in the state where the auxiliary fixing material is attached to the floor material, the thickness of the auxiliary fixing material in the height direction is shorter than the length in the horizontal direction. Therefore, the auxiliary fixing material has a shape that is easily surface-vibrated with respect to the vibration in the vertical direction. By attaching the leaf spring type damper device to the auxiliary fixing member having such a shape, the surface vibration of the flooring can be reliably reduced.

In particular, the floor material may include at least a structural plate material , and the auxiliary fixing material may be attached to the structural plate material . When a structural plate is used as an attachment target of a damper device, there is a possibility that sufficient holding force cannot be exhibited. On the other hand, a damper apparatus can be reliably hold | maintained by making the auxiliary | assistant fixing material which is a solid material into the attachment object of a damper apparatus.

Further, flooring, and the underfloor member Ru structural plate der attached to the structure frame, a first gypsum board arranged to overlap the upper surface side of the underfloor member, superimposed on the upper surface of the first plasterboard And a second gypsum board having a lower density per unit volume than the first gypsum board. When the density per unit volume of the second gypsum board is smaller than that of the first gypsum board, the rigidity in the bending direction of the first gypsum board is higher than that of the second gypsum board. Thereby, the floor base material, the first gypsum board, and the auxiliary fixing material function as an integral face material. As a result, a high vibration suppression effect can be exhibited by the damper device. In addition, the fact that the density per unit volume of the second gypsum board is smaller than that of the first gypsum board means that the second gypsum board is softer than the second gypsum board. Thereby, lightweight impact performance can be improved by arranging a relatively soft second gypsum board on the upper surface side.

  Further, the flooring material, auxiliary fixing material and leaf spring type damper device form a unit fixed in advance in a factory different from the construction site, and the unit is transported from the factory to the construction site and fixed to the building. You may make it do. The damper device has a considerable mass. For this reason, it is not easy to position and fix the back surface of the flooring with high accuracy at the construction site. Therefore, the damper device can be positioned and fixed with high accuracy by unitizing some of the members. As a result, a desired vibration suppressing effect can be reliably exhibited.

In addition, in the region surrounded by the structural frame, there are a plurality of abutting portions of a plurality of floor materials, and the floor structure is attached to each of a plurality of auxiliary fixing materials and a plurality of auxiliary fixing materials respectively connecting all the abutting portions. And a plurality of leaf spring type damper devices. By connecting all the abutting portions with a plurality of auxiliary fixing materials, the flooring material surrounded by the structural frame is integrally connected, and the surface vibration is integrally performed. By installing the leaf spring type damper device for such an integral flooring, the integral flooring surrounded by the structural frame is reduced as a whole. And a vibration reduction effect can be heightened by attaching a leaf | plate spring type damper apparatus to each of a some auxiliary | assistant fixing material.

It is a top view which shows the some flooring material in the floor-ceiling structure of 1st embodiment of this invention. It is a top view of the floor-ceiling structure of a state except the flooring of a first embodiment. FIG. 3 is a sectional view taken along line III-III in FIG. 2. FIG. 4 is an enlarged view of a portion IV in FIG. 3. (A) It is an enlarged view of the vibration proof hanging tree shown in FIG. (B) is a longitudinal cross-sectional view of (a). FIG. 6 is a cross-sectional view taken along the line VI-VI in FIG. 2. It is a top view which shows a structural frame and a leaf | plate spring type damper apparatus among the floor-to-ceiling structures of FIG. It is a top view which shows a structure frame, a ceiling joister, and a vibration-proof hanging tree among the floor-to-ceiling structures of FIG. It is a perspective view which shows a structure frame, an auxiliary | assistant fixing material, and a leaf | plate spring type damper apparatus among the floor-ceiling structures of FIG. (A) It is a front view of the leaf | plate spring type damper apparatus applied to the floor-ceiling structure of FIG. (B) It is a bottom view of a leaf | plate spring type damper apparatus. (C) is a right side view of the leaf spring type damper device. In 2nd embodiment of this invention, it is a top view of the floor-ceiling structure of a state except a flooring. It is XII-XII sectional drawing of FIG. It is an enlarged view of the XIII part of FIG. It is XIV-XIV sectional drawing of FIG. It is a top view which shows a structure frame and a leaf | plate spring type damper apparatus among the floor-to-ceiling structures of FIG. It is a perspective view which shows a structure frame, an auxiliary | assistant fixing material, and a leaf | plate spring type damper apparatus among the floor-ceiling structures of FIG. In the third embodiment of the present invention, it is a floor-to-ceiling structure when viewed from the back side of the flooring, and is a state in which the ceilinging material, the ceiling joist support, the anti-vibration hanging tree, and the anti-vibration joist support are removed. is there. In the fourth embodiment of the present invention, it is a floor-to-ceiling structure when viewed from the back surface side of the flooring material, excluding the ceiling material, the ceiling joist support, the anti-vibration hanging tree, the anti-vibration joist support and the auxiliary fixing material. It is a figure of a state.

<First embodiment>
The floor-ceiling structure of the first embodiment will be described with reference to FIGS. The floor-to-ceiling structure of this embodiment is a structure that constitutes an upper floor and a lower floor. Moreover, the floor-to-ceiling structure of the present embodiment is a structure when the present invention is applied to a 2 × 4 construction method. As shown in FIG. 1, the arrangement of the structural plywood 11 as a base material for a plurality of flooring materials will be described. FIG. 1 shows a room between eight square tatami mats. Six structural plywoods 11 having a size between 1 and 0.5 and four structural plywoods 11 having a size between 0.5 and 0.5 are used. At this time, the respective structural plywoods 11 are arranged with their edges facing each other. Here, the structural plywood 11 is a structural plywood defined by the Japanese Agricultural Standards (JAS), and has a thickness of 15 mm, for example.

  Next, as shown in FIGS. 2 to 6, the floor-to-ceiling structure connects a plurality of horizontal structural members 21 and 22. The floor material 10 is fixed to the upper surface of the horizontal structural members 21 and 22. Therefore, the horizontal frame structural member 21 of the outer frame is connected in a square frame shape. Inside the horizontal frame structural member 21 of the outer frame, seven horizontal structural members 22 are arranged in parallel with each other at equal intervals, and both ends thereof are connected to the horizontal frame structural member 21 of the outer frame. In this manner, eight rectangular structural frames 100 are formed by the horizontal structural members 21 and 22. One structural frame 100 is surrounded by a broken line in FIG.

  Here, the horizontal structural members 21 and 22 use 2 × 4 (two-by-four) structural members, and are referred to as beams, floor joists, and the like, for example. Here, the structural material is a member that becomes a framework for constructing a building. The horizontal structural members 21 and 22 are made of solid materials. Further, the horizontal structural members 21 and 22 are connected so that the height in the vertical direction in FIG. 4 is larger than the width in the horizontal direction in FIG. 4 in the cross-sectional shape orthogonal to the longitudinal direction. Has been. That is, the horizontal structural members 21 and 22 have a large cross-sectional secondary moment with respect to the horizontal axis (difficulty in bending when receiving a load in the vertical direction), and a cross-sectional secondary moment with respect to the vertical axis (when receiving a load in the horizontal direction). Bending difficulty) decreases.

  Further, as can be seen from FIG. 1 and FIG. 2 together, the horizontal frame structural members 21 and 22 of the outer frame are in the vertical direction of FIG. 1 among the abutting portions of the structural plywood 11 of the plurality of flooring materials 10. Connect the parts. However, among the abutting portions of the structural plywood 11 of the plurality of flooring materials 10, the abutting portions in the horizontal direction in FIG. 1 are not connected by the horizontal structural members 21 and 22. Therefore, in the regions surrounded by the respective structural frames 100, there are portions of the butted portions of the structural plywood 11 of the plurality of flooring materials 10 that are not connected by the horizontal structural members 21 and 22.

  The butted portions of the structural plywood 11 of the plurality of flooring materials 10 that are not connected by the horizontal structural members 21 and 22 are connected by the auxiliary fixing material 30. In particular, the auxiliary fixing material 30 connects the butt portions of all the floor materials 10 existing in the region surrounded by the structural frame 100. These auxiliary fixing materials 30 are non-structural materials and are formed with higher rigidity than the structural plywood 11. The non-structural material means a member that is not a structural material, and is a member that is not a framework for constructing a building.

  Specifically, the auxiliary fixing material 30 is formed in a flat plate shape thicker than the structural plywood 11. Here, the auxiliary fixing material 30 is a two-by-four material, that is, a solid material. Moreover, the thickness of the auxiliary fixing material 30 is larger than the thickness of the structural plywood 11. The auxiliary fixing material 30 is attached to the structural plywood so as to overlap each other in the thickness direction of the structural plywood 11 and the auxiliary fixing material 30.

  Here, the flat shape means a thin and flat shape. That is, in the state where the auxiliary fixing material 30 is attached to the structural plywood 11, the thickness of the auxiliary fixing material 30 in the height direction is shorter than the length in the horizontal direction. Therefore, the auxiliary fixing material 30 that is a non-structural material is different from the horizontal structural materials 21 and 22 that are structural materials, and has a shape that easily undergoes surface vibration against vibration in the vertical direction together with the floor material 10. As described above, in the state where the plurality of structural plywoods 11 are connected by the auxiliary fixing material 30, the structural plywood 11 in the region surrounded by the structural frame body 100 is in a state of surface vibration integrally.

  Further, as shown in FIG. 4, the auxiliary fixing member 30 is attached to the structural plywood 11 in a state slightly separated from the horizontal structural members 21 and 22. Also from this point, it is clear that the auxiliary fixing material 30 is a non-structural material.

  Further, as shown in FIG. 4, the flooring 10 is formed by adhering a structural plywood 11, a first gypsum board 12, a second gypsum board 13, and a plywood 14 as base materials in order from the bottom. The structural plywood 11 is a 15 mm structural plywood (JAS). The first gypsum board 12 is bonded to the upper surface of the structural plywood 11 and “normal hard gypsum board (GB-R-H) (JIS A 6901: 2005)” having a thickness of 12.5 mm is applied. The second gypsum board 13 is bonded to the upper surface of the first gypsum board 12 and “gypsum board (GB-R) (JIS A 6901: 2005)” having a thickness of 12.5 mm is applied.

Here, the mass per unit area of a normal hard gypsum board (GB-RH) having a thickness of 12.5 mm is 12.5 to 18.1 kg / m ² . Further, the bending fracture load (width direction) of the normal hard gypsum board (GB-RH) is 250 N or more. Moreover, the mass per unit area of the gypsum board (GB-RH) having a thickness of 12.5 mm is 7.5 to 11.3 kg / m ² . Further, the bending fracture load (width direction) of the gypsum board (GB-R) is 180 N or more. And the bending fracture load (width direction) of ordinary hard gypsum board (GB-RH) is larger than that of gypsum board (GB-R).

  Here, a gypsum board having a high density per unit volume has a higher bending fracture load than a gypsum board having a low density per unit volume. The density per unit volume of the first gypsum board 12 is larger than the density per unit volume of the second gypsum board 13. That is, the rigidity of the first gypsum board 12 in the bending direction is higher than that of the second gypsum board 13. Furthermore, the second gypsum board 13 is softer than the first gypsum board 12.

  Leaf spring type damper devices 40 are respectively attached to the lower surfaces of all the auxiliary fixing members 30. Here, the leaf spring type damper device 40 is formed, for example, as shown in FIGS. 10 (a) to 10 (c). For example, a leaf spring type damper device described in Japanese Patent Application Laid-Open No. 2010-230031 is applied. In addition, it is not restricted to this leaf | plate spring type damper apparatus, The leaf | plate spring type damper apparatus of another structure is also applicable.

  As shown in FIGS. 10A to 10C, the leaf spring type damper device 40 includes a mass member 41, a leaf spring portion 42, and a viscoelastic body 43. The mass member 41 is formed in a columnar shape, for example. The leaf spring portion 42 fixes the mass member 41 on the distal end side and fixes the proximal end side to the auxiliary fixing member 30. At this time, the leaf spring portion 42 is fixed to the auxiliary fixing member 30 so that the mass member 41 can move relative to the auxiliary fixing member 30 in the vertical vibration direction. Further, the base end side of the leaf spring portion 42 is fixed to the end side in the longitudinal direction of the auxiliary fixing member 30.

  The viscoelastic body 43 is attached to the side opposite to the mass member 41, that is, on the auxiliary fixing member 30 side in the distal end side of the leaf spring portion 42. When the mass member 41 vibrates, the viscoelastic body 43 may always keep a contact state with the auxiliary fixing member 30, or may repeat the contact state and the separated state. In the latter case, the viscoelastic body 43 acts to hit the auxiliary fixing material 30. In the present embodiment, the leaf spring type damper device 40 including the viscoelastic body 43 has been described as an example, but a damper device not including the viscoelastic body 43 can also be applied.

  Furthermore, the ceiling material 50 is arrange | positioned through the clearance gap under the horizontal structure materials 21 and 22, as shown in FIG.3 and FIG.4. As shown in FIGS. 4 and 8, the ceiling member 50 is supported by the horizontal structural member 21 by a ceiling joist support 61 and a vibration-proof hanging tree 62. Specifically, four ceiling joist supports 61 are fixed to the horizontal frame structure member 21 of the outer frame via vibration-proof metal fittings 63 (shown in FIGS. 2 and 8). The ceiling joist support 61 and the ceiling member 50 are connected in a vibration-proof manner by three vibration-proof hanging trees 62 attached to the ceiling. As shown in FIG. 2 and FIG. 8, the vibration isolator 63 is arranged at both ends of the ceiling joist 61. In FIG. 2, the anti-vibration suspension tree 62 is provided at a portion (12 locations) where the ceiling joist support 61 and the auxiliary fixing member 30 intersect. As shown in FIGS. 5A and 5B, the anti-vibration hanging tree 62 includes a metal fitting 62a fixed to the ceiling joist support 61, a metal fitting 62b fixed to a field edge of the ceiling 50 or a field edge support, And an anti-vibration rubber 62c sandwiched between the vertical directions of the metal fittings. The anti-vibration suspension tree 62 is not limited to the above configuration as long as the anti-vibration suspension tree 62 has a vibration-proof performance by the anti-vibration rubber 62c.

  As described above, the leaf spring type damper device 40 is not directly attached to the structural plywood 11 that is the base material of the floor material 10, but is an auxiliary fixing material that is a non-structural material and has higher rigidity than the floor material 10. 30 is attached. Therefore, even if the floor material 10 does not have sufficient holding strength, the leaf spring type damper device 40 can be reliably fixed to the auxiliary fixing material 30. Moreover, even when the mass of the mass member 41 of the leaf spring type damper device 40 is increased, the damper device 40 can be reliably fixed.

  Further, the auxiliary fixing material 30 that is a non-structural material vibrates with the floor material 10 integrally, unlike structural materials such as beams and joists. Then, by attaching the leaf spring type damper device to the auxiliary fixing material 30 that does not vibrate together with the flooring material 10 but to the auxiliary fixing material 30 that vibrates with the flooring material 10, the surface vibration of the flooring material 10 is ensured. Can be reduced.

  In particular, the auxiliary fixing material 30 is formed in a flat plate shape and is attached to the floor material 10 so as to overlap each other in the thickness direction of the floor material 10 and the auxiliary fixing material 30. That is, in the state where the auxiliary fixing material 30 is attached to the floor material 10, the thickness in the height direction of the auxiliary fixing material 30 is shorter than the length in the horizontal direction. Therefore, the auxiliary fixing member 30 has a shape that is likely to undergo surface vibration with respect to vibration in the vertical direction. By attaching the leaf spring type damper device 40 to the auxiliary fixing member 30 having such a shape, the surface vibration of the flooring 10 can be reliably reduced.

  Furthermore, the auxiliary fixing member 30 is attached to the flooring 10 in a state of being separated from the horizontal structure members 21 and 22. As a result, the auxiliary fixing member 30 performs surface vibration integrally with the flooring material 10 independently of the horizontal structural members 21 and 22. Therefore, the surface vibration of the flooring 10 due to the leaf spring type damper device 40 can be reliably reduced.

  The auxiliary fixing member 30 is made of a solid material, not a laminated material. Thereby, when the leaf | plate spring type damper apparatus 40 is attached to the auxiliary | assistant fixing material 30, the force holding the damper apparatus 40 by the auxiliary | assistant fixing material 30 can fully be made high. In particular, as compared with the case where the leaf spring type damper device 40 is attached to the structural plywood 11 of the flooring 10, the holding force by the solid auxiliary fixing material 30 is extremely high. Therefore, the leaf spring type damper device 40 can be reliably held by using the auxiliary fixing member 30 as the attachment target of the plate spring type damper device 40. As a result, the vibration suppressing effect can be exhibited stably.

  Further, the auxiliary fixing material 30 connects the abutting portions of the plurality of structural plywoods 11. In this way, by connecting the plurality of structural plywoods 11 to be abutted by the auxiliary fixing material 30, the plurality of structural plywoods 11 undergo surface vibration as an integral face material. That is, the vibration mode of each structural plywood 11 is the same without causing a shift in the abutting portion of each structural plywood 11. Therefore, the vibration of the plurality of structural plywoods 11 connected by the auxiliary fixing material 30 is reliably reduced by the leaf spring type damper device 40 attached to the auxiliary fixing material 30.

  Further, in the region surrounded by the structural frame 100, the plurality of auxiliary fixing members 30 respectively connect all the butted portions of the plurality of structural plywoods 11. And the leaf | plate spring type damper apparatus 40 is attached to all the auxiliary fixing materials 30, respectively. By connecting all the abutting portions with the plurality of auxiliary fixing members 30, the structural plywood 11 surrounded by the structural frame body 100 is integrally connected, and the surface vibration is integrally performed. By installing the leaf spring type damper device 40 on such an integral face material, the integral flooring 10 surrounded by the structural frame 100 is reduced in vibration as a whole. And the vibration reduction effect can be heightened by attaching the leaf | plate spring type damper apparatus 40 to each of the some auxiliary | assistant fixing material 30. FIG.

  Moreover, the relatively hard first gypsum board 12 was arranged on the lower side, and the relatively soft second gypsum board 13 was arranged on the upper side. By disposing the relatively hard first gypsum board 12 on the lower side, the first gypsum board 12, the structural plywood 11 and the auxiliary fixing material 30 function as an integral face material. As a result, a high vibration suppressing effect can be exhibited by the leaf spring type damper device 40. A relatively soft second gypsum board 13 was placed on the upper side. Thereby, since the lightweight impact reduction effect by the 2nd gypsum board 13 can be exhibited, lightweight impact performance can be improved.

  Further, the ceiling material 50 is supported by the ceiling joist support 61 via the vibration-proof hanging tree 62. Further, the ceiling joist support 61 is supported by the horizontal structural members 21 and 22 through the vibration-proof metal receiving piece 63. As described above, the vibration of the ceiling member 50 can be reduced as a function of the anti-vibration hanging tree 62 and the anti-vibration receiver 63 itself. Furthermore, the vibration of the flooring 10 can be more effectively reduced from being propagated to the ceiling member 50 by providing the above-described leaf spring type damper device 40 with the vibration-proof hanging tree 62 and the vibration-proof metal fitting 63. The anti-vibration hanging tree 62 can reliably reduce the vibration of the ceiling material 50.

  In addition to the above embodiment, the base end side of the leaf spring portion 42 of the leaf spring type damper device 40 may be attached to a portion that can be an antinode of the vibration mode of the flooring 10 surrounded by the structural frame body 100. Good. In this case, when the flooring 10 surrounded by the structural frame 100 vibrates, the mass member 41 of the leaf spring type damper device 40 can vibrate greatly, and as a result, the vibration of the flooring 10 can be reduced.

<Second embodiment>
The ceiling floor structure of 2nd embodiment is demonstrated with reference to FIGS. The floor-to-ceiling structure of this embodiment is a structure when the present invention is applied to a conventional shaft assembling method. Therefore, the type and arrangement of the horizontally-structured material are different from the above embodiment. Hereafter, the part different from the said embodiment is demonstrated. In the present embodiment, the same or corresponding components as those in the above embodiment are denoted by the same reference numerals.

  Three horizontal structural members 22 are arranged at equal intervals in parallel to each other inside the horizontal structural member 21 of the outer frame. In this way, the four structural frames 100 are formed by the horizontal structural members 21 and 22. That is, the width of one structural frame 100 becomes larger than the above.

  Therefore, in the region surrounded by one structural frame body 100, two leaf spring type damper devices 40 are attached to each auxiliary fixing member 30. At this time, the two leaf spring type damper devices 40 are arranged so that the base ends face each other. That is, the base end side of these leaf spring type damper devices 40 is fixed to a portion of the floor material 10 in the region surrounded by the structural frame body 100 that can become an antinode of the vibration mode. In addition, the ceiling joist support 61 is disposed between two leaf spring type damper devices 40 that are disposed with their base ends facing each other. Even when applied to the conventional construction method, the same effects as when applied to the 2 × 4 construction method are exhibited.

<Third embodiment>
Next, the ceiling floor structure of the third embodiment will be described with reference to FIG. In the above embodiment, the abutting portions of the plurality of structural plywoods 11 are connected by the auxiliary fixing material 30, and the leaf spring damper device 40 is attached to the auxiliary fixing material 30. In this embodiment, the auxiliary fixing material 30 is a position where the butted portion of the structural plywood 11 is removed, and is attached to the single structural plywood 11. Then, the leaf spring type damper device 40 is attached to each auxiliary fixing member 30.
Also in this case, since the auxiliary fixing material 30 may be attached to the single structural plywood 11, the construction becomes easy. Moreover, the vibration suppression effect with respect to the separate structural plywood 11 can be exhibited reliably.

<Fourth embodiment>
The ceiling floor structure of the fourth embodiment will be described with reference to FIG. FIG. 18 is a view in which the auxiliary fixing material 30 is removed for easy understanding with respect to FIG. 17. Here, in the said embodiment, all the leaf | plate spring type damper apparatuses 40 make the frequency of vibration suppression object the same. That is, in the above, the leaf spring type damper device 40 is formed by the same structure.

  In contrast, in the present embodiment, two types of leaf spring damper devices 40a and 40b having different vibration suppression frequencies are used. For example, the frequency of one leaf spring damper device 40a is 50 Hz, and the frequency of the other leaf spring damper device 40b is 55 Hz. Then, as shown in FIG. 18, two types of leaf spring type damper devices 40 a and 40 b are arranged in a staggered pattern with respect to the flooring 10.

  Since the frequency bands of the two types of leaf spring damper devices 40a and 40b are different, vibrations in a wide frequency band can be effectively suppressed. Furthermore, the vibration suppression effect in a wide frequency band can be exhibited evenly on the flooring 10 by arranging in a staggered pattern.

<Fifth embodiment>
The structural plywood 11, the auxiliary fixing material 30, and the leaf spring type damper device 40 of the floor material 10 form a unit fixed in advance in a factory different from the construction site. For example, in the configuration shown in the first embodiment, the plurality of structural plywoods 11, the one or more auxiliary fixing members 30, and the one or more leaf spring damper devices 40 are unitized. Further, the horizontal structural members 21 and 22 may be unitized together with the above. And the unit formed in the factory is conveyed from a factory to a construction site, and is fixed to a building.

  Here, the leaf spring type damper device 40 has a considerable mass. Therefore, in the construction site, it is not easy to position and fix the leaf spring type damper device 40 to the back surface of the flooring 10 with high accuracy. Therefore, by forming a part of the members including the leaf spring damper device 40 as a unit, the leaf spring damper device 40 can be positioned and fixed with respect to the floor material 10 and the auxiliary fixing material 30 with high accuracy. . As a result, a desired vibration suppressing effect can be reliably exhibited.

10: floor material, 11: structural plywood, 12: first gypsum board, 13: second gypsum board, 21, 22: horizontal structure material, 30: auxiliary fixing material, 40, 40a, 40b: leaf spring damper Device: 50: ceiling material, 61: ceiling joister, 62: anti-vibration hanging tree, 63: anti-vibration metal object, 100: structural frame

Claims (9)

A structural frame connecting a plurality of horizontal structural members;
A flooring fixed to the upper surface of the structural frame;
It is attached to the flooring in a state of being horizontally separated from the horizontal structure in a region surrounded by the structural frame, and is formed of a solid material that is higher in rigidity than the flooring and does not constitute a building framework. Auxiliary fixing material,
A leaf spring type damper device attached to the auxiliary fixing material and suppressing vibration of the floor material;
With floor structure . The leaf spring type damper device includes first and second leaf spring type damper devices having different vibration suppression frequencies,
A plurality of the first leaf spring type damper devices are arranged in a staggered pattern with respect to the floor material ,
A plurality of the second leaf spring type damper devices are arranged in a staggered pattern at a position where the first plate spring type damper device is not arranged with respect to the flooring material,
A plurality of said first, second plate spring damper device, Ru are arranged in a grid pattern, the floor structure of claim 1. The floor structure includes a plurality of flooring materials that are fixed to the upper surface of the structural frame body and arranged to face each other.
The floor structure according to claim 1 or 2 , wherein the auxiliary fixing member connects butted portions of the plurality of floor members. The floor structure includes a plurality of flooring materials that are fixed to the upper surface of the structural frame body and arranged to face each other.
The floor structure according to claim 1 or 2 , wherein the auxiliary fixing material is located at a position where a butt portion of the plurality of floor materials is removed, and is attached to a single floor material. The floor structure according to any one of claims 1 to 4 , wherein the auxiliary fixing material is formed in a flat plate shape, and is attached to the floor material in an overlapping manner in the thickness direction of the floor material and the auxiliary fixing material.   The flooring includes at least a structural plate,
  The floor structure according to any one of claims 1 to 5, wherein the auxiliary fixing member is attached to the structural plate member. The flooring is
And the underfloor member Ru said structural plate der attached to the structural frame,
A first gypsum board placed on the upper surface side of the floor base material;
A second gypsum board having a lower density per unit volume than the first gypsum board;
The floor structure of claim 6 comprising: The flooring material, the auxiliary fixing material and the leaf spring type damper device form a unit fixed in advance in a factory different from the construction site,
The floor structure according to any one of claims 1 to 7 , wherein the unit is transported from the factory to a construction site and fixed to a building. In the region surrounded by the structural frame, there are a plurality of butted portions of the plurality of flooring materials,
The floor structure comprises a plurality of the auxiliary fixing member for connecting all of the abutting portions, respectively, and a plurality of the plate spring damper unit mounted to each of the plurality of auxiliary fixing member, the, according to claim 3 bed Structure .

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