WO2007020841A1

WO2007020841A1 - Floor-ceiling structure

Info

Publication number: WO2007020841A1
Application number: PCT/JP2006/315670
Authority: WO
Inventors: Yoshimitsu Murahashi; Hiroaki Kawakami; Kyoko Masuda; Kazuki Tsugihashi
Original assignee: Nippon Steel Corporation; Kabushiki Kaisha Kobe Seiko Sho
Priority date: 2005-08-12
Filing date: 2006-08-08
Publication date: 2007-02-22
Also published as: KR20080037706A; TWI322214B; CN101238258B; CN101238258A; TW200716833A

Abstract

A floor-ceiling structure between an upper story floor board and a lower story ceiling board, comprising a plurality of floor joists disposed in a specific direction in the state of being arranged roughly parallel with each other, side joists disposed at positions for holding the floor joists in the specific direction in the state of being arranged parallel with these floor joists, end joists which are disposed at positions for holding the floor joists in a direction crossing perpendicularly to the specific direction and to which the end parts of the side joists and the floor joists are fixed, and a ceiling beam for suspending the ceiling board disposed across the end joists so as to be roughly parallel with the side joists. At least one joist among a joist group formed of the side joists and the plurality of floor joists is supported by the wall of the upper story or the lower story, and the ceiling beam is installed only near the wall.

Description

Specification

Floor-ceiling structure

Technical field

[0001] The present invention relates to a floor-ceiling structure supported by a plurality of walls, and particularly relates to a structure excellent in soundproofing performance.

Background art

[0002] In recent years, in the construction of houses, instead of a floor structure in which floor frames are joined to a timber frame, a floor structure in which floor plates are joined to a frame made of a metal frame and beams (steel houses) Has been adopted. This steel house uses a frame made of metal profile and a frame made of beams, so it can improve earthquake resistance and durability.

[0003] In addition, when a floor structure having such a frame made of a metal shape frame and a beam material is used as a boundary floor at the boundary between upper and lower floors of an apartment house (hereinafter referred to as a floor-ceiling structure). ) Although this is an improvement over the conventional timber-framed floor structure, additional soundproofing measures may be required due to increased consumer demand. In particular, it is necessary to take countermeasures such as the impact sound (hereinafter referred to as the heavy floor impact sound) that occurs when people are flying or walking downstairs.

[0004] As a general method for reducing heavy floor impact sound, there are (1) a method for increasing the weight of the floor structure and (2) a method for increasing the bending rigidity of the floor structure. In addition, there are (3) a method of imparting vibration damping to the floor, etc. as a method of suppressing the uncomfortable feeling by attenuating the floor vibration after the impact force action quickly. Further, these methods (1), (2) and (3) can be used in combination.

[0005] In Patent Document 1, the number of parts is not increased, and the vibration of the heavy floor impact sound vibration mode on the floor is dispersed on the ceiling and does not hinder the piping in the space in the floor. Heavy weight floors are disclosed for ceiling structures and buildings that provide a ceiling structure and building with reduced impact noise.

[0006] In the ceiling structure and building described in Patent Document 1, the vibration of the heavy floor impact sound vibration mode on the floor is dispersed by the ceiling panel by the weight member attached to the edge of the ceiling panel, so that The weight floor impact sound will be reduced, and the weight member is attached to the edge of the ceiling panel. Therefore, the number of parts for attaching the weight member will not increase. Since the space in the section is not closed at all, there is an effect that the piping in the floor is not hindered. In addition, since the peripheral edge of the ceiling panel to which the weight member is attached is attached to the floor joist via the anti-vibration rubber, vibration distribution in the ceiling panel is made more effective, and the heavy floor impact sound by the weight member is achieved. If the reduction effect is further improved, a drought effect can be obtained.

[0007] Further, Patent Document 2 discloses that the floor impact sound can be reduced by suppressing the propagation of vibration from the upper floor to the lower floor for both light impact and heavy impact. A soundproof ceiling structure that can improve sound insulation in a frequency range is disclosed.

[0008] In the soundproof ceiling structure described in Patent Document 2, when vibration propagates from the ceiling base material to the ceiling material via the suspension, the vibration-proof material has a vibration damping action, and thus the ceiling generated by solid propagation. The effect that the vibration level of a material can be reduced significantly is acquired.

[0009] Further, Patent Document 3 discloses a ceiling hanger that can absorb vibrations in a wide frequency band.

[0010] In the ceiling hanger described in Patent Document 3, an upper mounting member that is attached to a beam behind the ceiling, and a lower attachment that extends downward from the side of the upper mounting member and supports the ceiling base at the lower end portion A ceiling suspension device including a damper member at a connecting portion between the upper mounting member and the lower mounting member, wherein the damper member includes a plurality of vibration isolating rubbers having different vibration absorption bands. Because it is equipped, it is possible to absorb vibrations in a wide frequency band.

[0011] However, in any structure of Patent Documents 1 to 3, a weight member is added, a fluid is sealed inside the elastic body, or vibration-proof rubbers having different hardnesses are stacked. Must be placed. Therefore, even if there is a slight increase in the number of parts or costs at one location, the increase in the number of parts and the cost will rapidly increase as the structure becomes larger.

Patent Document 1: Japanese Patent Laid-Open No. 2002-121856

Patent Document 2: JP-A-10-183849

Patent Document 3: Japanese Patent Laid-Open No. 2003-313987

Disclosure of the invention

[0012] The object of the present invention is to greatly reduce the floor impact sound over a wide frequency band, It also provides a floor-to-ceiling structure that does not require additional components and complex design.

In order to achieve the above object, the present invention is arranged in a specific direction in a state in which the floor-to-ceiling structure between the upper floor board and the lower floor ceiling board is arranged substantially parallel to each other. A plurality of floor joists, a side joist disposed in a position sandwiching the floor joists from the specific direction in a state of being arranged substantially parallel to the floor joists, and the floor joists from a direction orthogonal to the specific directions. An end joist which is disposed at a position between which the end of the side joist and the floor joist is fixed, and a ceiling beam for suspending the ceiling board, and the side joist straddling the end joist And at least one joist of the joist group composed of the side joists and the plurality of floor joists are supported by the walls of the upper and lower floors. The ceiling beam is provided only in the vicinity of the wall. is there.

Brief Description of Drawings

FIG. 1 is a perspective view showing an example of a floor-ceiling structure according to a first embodiment.

FIG. 2 is a plan view of the floor-ceiling structure of FIG.

FIG. 3 is a schematic perspective view showing details of a ceiling beam.

[FIG. 4] FIG. 4 (a) is a cross-sectional view showing the structure of a floor-ceiling structure, and FIG. 4 (b) is a diagram for explaining the behavior when a force is applied to the floor board.

[FIG. 5] FIG. 5 (a) is a schematic sectional view of the floor, and FIG. 5 (b) to FIG. 5 (e) are schematic diagrams showing the first to fourth order modes of the floor, respectively.

[FIG. 6] FIG. 6 (a) is a schematic sectional view of the floor, and FIG. 6 (b) to FIG. 6 (e) are schematic views showing the first to fourth order modes of the floor, respectively.

[Fig. 7] Fig. 7 (al), Fig. 7 (a2), Fig. 7 (bl), and Fig. 7 (b2) are schematic diagrams showing examples of wall arrangement.

[Fig. 8] Fig. 8 (al), Fig. 8 (a2), Fig. 8 (bl), and Fig. 8 (b2) are schematic diagrams showing examples of wall arrangement.

FIG. 9 (a) to FIG. 9 (d) are plan views showing other examples of the floor-ceiling structure.

FIG. 10 is a diagram showing vibration transmissibility in Examples 1 to 3 and Comparative Example 1.

[FIG. 11] FIG. 11 is a diagram showing the measurement results of heavy floor impact sound experiment. [FIG. 12] FIG. 12 is a diagram showing the results of a lightweight floor impact sound experiment measurement.

FIG. 13 (a) to FIG. 13 (c) are diagrams illustrating Examples 1 to 3, respectively, and FIG. 13 (d) is a diagram illustrating Comparative Example 1.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments according to the present invention will be described.

[0016] (First embodiment)

FIG. 1 is a perspective view showing an example of the floor-ceiling structure 100 according to the first embodiment, and FIG. 2 is a plan view of the floor-ceiling structure 100 of FIG.

[0017] The floor-ceiling structure 100 in FIGS. 1 and 2 is a structure between an upper floor board 50 and a lower floor ceiling board 60 (not shown). , Floor joist 20, ceiling beam 30, suspension member 31 (not shown), field edge receiver 32 (not shown), field edge 33 (not shown). The ceiling beam 30, the suspension member 31, the field edge receiver 32, and the field edge 33 constitute a ceiling support part for suspending the ceiling plate 60 from the edge joist 11.

As shown in FIGS. 1 and 2, in the floor-ceiling structure 100, a pair of end joists 11 arranged substantially parallel to each other and a pair of side joists arranged so as to be substantially orthogonal to the end joists 11 A rectangular frame is formed by connecting the end portions of 1 and 2, respectively. In the frame body, a plurality of floor joists 20 are arranged substantially parallel to the side joists 12, and both ends of the floor joists 20 are fixed to a pair of end joists 11, respectively. In other words, the pair of side joists 12 are arranged at positions sandwiching the floor joists 20 from the arrangement direction, and the pair of end joists 11 are arranged at positions sandwiching the floor joists 20 from the direction orthogonal to the arrangement directions. Has been. The floor board 50 is fixed by the pair of end joists 11 and side joists 12 and the plurality of floor joists 20.

In addition, as shown in FIG. 2, a plurality of ceiling beams 30 are arranged in the frame body substantially parallel to the pair of side joists 12 and the plurality of floor joists 20, and these ceiling beams 30. Both ends of each are fixed to a pair of end joists 11. Details of the number and arrangement of the ceiling beams 30 will be described later.

FIG. 3 is a schematic perspective view showing details of the ceiling beam 30. As shown in FIG. 3, the upper surface of the pair of end joists 11, the upper surfaces of the pair of side joists 12, and the upper surfaces of the plurality of floor joists 20 are almost the same height, and can support the floor board 50. Yes. End joist 11 opens inward The both ends of the side joist 12 and the floor joist 20 enter into the opening of the joist 11. The cross-sectional shape of the end joist 11 is not limited to a substantially U shape, and may be another shape such as an I shape. The ceiling beam 30 has a substantially U-shaped cross section. The cross-sectional shape of the ceiling beam 30 is not limited to a substantially U shape, and may be any shape such as a mouth shape or a Z shape.

As shown in FIG. 4A, a suspension member 31 is suspended from the ceiling beam 30, and the suspension member 31 extends downward from the ceiling beam 30. The material of the suspending member 31 is made of wood or metal. In particular, when the material is made of metal, it is also called a hanging hardware or a hanging bracket. A field edge 33 to which the ceiling plate 60 is fixed is attached to the lower part of the suspension member 31 via a field edge receiver 32. The field edge 32 is a rod-shaped member extending in a direction substantially perpendicular to the field edge 33. The field receiver 32 may be attached to a position above the lower end of the suspension member 31 or may be attached to the lower end of the suspension member 31 so as to protrude below the suspension member 31. .

The ceiling beam 30 is provided without protruding from the upper surfaces of the pair of end joists 11. And the suspension member 31 is also provided without protruding the upper surface force of the pair of end joists 11, and is provided protruding from the lower surface. That is, the ceiling beam 30 is provided so as not to contact the floor plate 50, and the ceiling plate 60 is attached to the ceiling beam 30 via the suspension member 31, the field edge receiver 32, and the field edge 33.

Next, a vibration transmission mechanism in the floor-ceiling structure 100 will be described. 4 (a) and 4 (b) are diagrams for explaining vibration transmission from the floor board 50. FIG. FIG. 4 (a) is a cross-sectional view showing the structure of the floor-ceiling structure 100, and FIG. 4 (b) is a diagram for explaining the behavior when a force F is applied to the floor board 50. FIG.

First, as shown in FIG. 4B, a force F is applied to the floor board 50. The vibration generated by this is transmitted to the end joist 11, side joist 12 and floor joist 20 as a solid propagation component. The vibration transmitted to the end joist 11 is transmitted to the ceiling beam 30, and the vibration transmitted to the side joists 12 and the plurality of floor joists 20 is transmitted to the ceiling beam 30 via the end joists 11. The vibration transmitted to the ceiling beam 30 is transmitted to the ceiling board 60 via the suspension member 31, the field edge receiver 32 and the field edge 33.

[0025] When a force F is applied to the floor board 50, at the same time, as the air propagation component (sound), Vibration is transmitted to the ceiling plate 60 via air in the floor-ceiling structure. In such a structure, the solid propagation component is more dominant than the air propagation component.

[0026] Next, the structure of the floor board 50, the frame body, and the floor joist 20 in the present embodiment (hereinafter, floor board 50, floor joist 20, frame body (end joist 11 and side joist 12) are collectively referred to as the floor 200. The general form of vibration in) will be explained. In the present embodiment, the occurrence of vibration modes in the longitudinal direction of the edge joist 11 of the floor 200 is significant, so only the vibration modes in one direction will be described.

FIG. 5 (a) to FIG. 5 (e) are schematic diagrams for explaining the vibration of a floor configured by arranging two floors 200a and 200b in the longitudinal direction of the end joists 11. Fig. 5 (a) is a schematic sectional view of the floor, Fig. 5 (b) shows the primary mode of the floor, Fig. 5 (c) shows the secondary mode of the floor, and Fig. 5 (d) shows the floor. Fig. 5 (e) shows the fourth-order mode of the floor. The upper part of the space partitioned by the floor 200a and the floor 20 Ob is the upper floor, and the lower part is the lower floor.

[0028] As shown in Fig. 5 (a), the two floors 200a and 200b are arranged in a state where the side joists 12 are in contact with each other. The floors 200a and 200b may be arranged such that a predetermined gap is formed between the side joists 12 so that the common joists 12 are used in common. It ’s all in one piece!

[0029] A wall 70 is provided vertically on the end of one end of the floor 200a (left side in FIG. 5A), and a wall 70 is provided on the upper surface of the center of the floor 200a. Specifically, the upper and lower walls 70 are connected to the side joists 12 on one end of the floor 200a, and the second wall 70 from the left on the upper floor is connected to the floor joists 20 in the center. Has been. In other words, the side joist 12 at one end is supported by the lower and upper floor walls 70, and the floor joist 20 at the center is supported by the upper floor wall 70.

[0030] Further, a wall 70 is provided up and down at the end of the other end side (right side in FIG. 5A) of the floor 200b, and a wall 70 is provided at the lower surface of the center part of the floor 200b. Specifically, the upper and lower walls 70 are connected to the side joists 12 on the other end of the floor 200a, and the second wall 70 from the right on the lower floor is connected to the floor joists 20 in the center. It is connected. In other words, the side joist 12 on the other end side is supported by the lower and upper floor walls 70, and the floor joist 20 at the center is supported by the lower floor wall 70. [0031] Hereinafter, for the sake of explanation, the distance from the wall 70 provided only on the upper floor of the floor 200a to the wall 70 provided only on the lower floor of the floor 200b is represented as a distance L.

[0032] When attention is paid to the floor 200a and the floor 200b shown in FIG. 5 (a), the position corresponding to the joist supported by the wall 70 in the frame body is a node of vibration. Accordingly, when the force F force applied to the floor plate 50 includes a frequency component that matches the primary natural frequency, the floor 200a and the floor 200b vibrate in the -order mode as shown in FIG. 5 (b). That is, the amplitude of the portion of the distance LZ2 from the wall 70 existing only on the upper floor is the maximum (antinode), and the amplitude of the portion close to the wall 70 is the minimum (node).

[0033] Further, when the force F force applied to the floor plate 50 includes a frequency component that coincides with the secondary natural frequency, the floor 200a and the floor 200b are in the secondary mode as shown in FIG. 5 (c). Vibrates with. In this case, the amplitudes at the distances L / 4 and 3L / 4 from the wall 70 existing only on the upper floor are maximized, and the amplitudes of the LZ2 portion and the portion close to the wall 70 are minimized.

[0034] Furthermore, when the force F force applied to the floor plate 50 includes a frequency component that matches the third natural frequency, the floor 200a and the floor 200b are in the third order mode as shown in Fig. 5 (d). Vibrate. In this case, the amplitude is minimized between the portions LZ3 and 2LZ3 from the wall 70 existing only on the upper floor and the portion close to the wall 70.

[0035] Further, when the force F force applied to the floor plate 50 includes a frequency component that coincides with the fourth-order natural frequency, the floor 200a and the floor 200b are in the fourth-order mode as shown in Fig. 5 (e). It will vibrate. In this case, the amplitude is minimized between the portion at a distance LZ4 from the wall 70 existing only on the upper floor and the portion close to the wall 70.

[0036] Therefore, in consideration of the vibration mode in the longitudinal direction of the edge joists 11 of the floors 200a and 200b, it is preferable to provide the ceiling beam 30 in a portion where the vibrations of the floors 200a and 200b are small.

[0037] Next, another example of the general vibration mode described in FIG. 5 will be described. 6 (a) to 6 (e) are schematic diagrams for explaining the vibration of the floor formed by arranging the two floors 200a and 200b in the longitudinal direction of the end joist 11. FIG.

[0038] Fig. 6 (a) is a schematic cross-sectional view of the floor, Fig. 6 (b) shows the primary mode of the floor joists 11 in the longitudinal direction, and Fig. 6 (c) shows the end of the floor. Fig. 6 (d) shows the second-order mode in the longitudinal direction of joist 11. Fig. 6 (e) shows the fourth mode in the longitudinal direction of edge joist 11 on the floor.

[0039] As shown in FIG. 6, walls 70 are provided above and below the end portion on one end side of the floor 200a and the end portion on the other end side of the floor 200b. A wall 70 is provided on the upper side of the floor 200b. That is, as described with reference to FIG. 5 (a), the side joist 12 on one end of the floor 200a and the side joist 12 on the other end of the floor 200b are supported by the wall 70 on the lower floor and the upper floor. At the same time, the floor joist 20 near one end of the floor 200 b is supported by the wall 70 on the upper floor.

[0040] In the following description, the distance from the left wall 70 to the upper wall 70 in the figure is L11, and the distance from the center wall 70 to the right wall 70 in the figure is L12. .

[0041] In the floor 200a and a part of the floor 200b within the distance L11, vibrations of the primary mode, the secondary mode, the tertiary mode, and the fourth mode occur in the floor 200a and the floor 200b, respectively, according to the applied force. However, in any of the first to fourth modes, the amplitude of the floor 200a is small when the distance from the wall 70 is within 1Z8 of L11. That is, on the left side of the wall 70 provided only on the upper floor, the vibration transmissibility is the lowest when the ceiling beam 30 is provided only in the portion close to the wall 70.

Similarly, a part of the floor 200b within the range of the distance L12 generates vibrations in the primary mode, the secondary mode, the tertiary mode, and the quaternary mode according to the applied force. However, in any of the first to fourth modes, the amplitude of the floor 200b is small within the range of 1/8 or less of the distance force from the wall 70. That is, it is shown that the vibration transmissibility is lowest when the ceiling beam 30 is provided only in the portion close to the wall 70 on the right side of the wall 70 provided only on the upper floor.

[0043] From the above, the ceiling beam 30 is placed on the left side of the wall 70 provided only on the upper floor, within the range from the wall 70 to 1Z8 below L11, and on the right side of the wall 70 provided only on the upper floor. By providing the wall 70 within the range of 1Z8 or less of L12, it is possible to reduce the vibration generated in the floors 200a and 200b from being transmitted to the ceiling board 60 by the solid propagation component.

[0044] In particular, when the ceiling beam 30 is provided within a range of 1/4 or less of the distance Ll l, L12 from the wall 70, the primary mode and secondary mode antinodes are not included. The vibration of the ceiling due to the mode and the secondary mode can be reduced, and the ceiling beam 30 is separated from the wall 70 by the distance L11, If it is set within the range of 1Z6 or less of L12, the antinodes of the primary mode, secondary mode and tertiary mode are not included, so the ceiling of the primary mode, secondary mode and tertiary mode Vibration can be reduced, and when the ceiling beam 30 is provided within the range of 1Z8 or less of the distance Ll l, L12 from the wall 70, the primary to fourth mode antinodes are not included. ~ The vibration of the ceiling caused by the 4th mode can be reduced.

Next, a specific example of the arrangement of the walls 70 will be described. FIG. 7 (al) to FIG. 7 (b2) and FIG. 8 (a 1) to FIG. 8 (b2) are schematic diagrams showing examples of the arrangement of the walls 70. FIG.

In FIG. 7 (al) and FIG. 7 (a2), a wall 70 is provided under the floor 200a, and in FIG. 7 (bl) and FIG. 7 (b2), the wall 70 is located above the contact portion of the floor 200a and the floor 200b. In Fig. 8 (al) and Fig. 8 (a2), walls 70 are provided above and below the contact portion between the floor 200a and the floor 200b, and Fig. 8 (bl) and Fig. 8 (b2) are the floor 200a and the floor 200b. A wall 70 is provided below the contact portion.

[0047] When the wall 70 is provided under the floor 200a as shown in Fig. 7 (al), the ceiling beam 30 is arranged in the vicinity of the wall 70 as shown in Fig. 7 (a2). Is preferred. That is, by providing the ceiling beam 30 near the vibration node of the floor 200a, the vibration transmitted to the ceiling plate 60 can be minimized.

[0048] In particular, in consideration of vibration from the primary mode to the fourth mode, the position where the ceiling beam 30 is arranged may be within a range of 1Z4 or less of the distance Lla (Lla ') from the wall 70. Preferably, the distance from the wall 70 is more preferably within 1Z6 or less of Lla (Lla,), and the distance from the wall 70 is preferably within 1Z8 or less of Lla (Lla '). The distance from the preferred wall 70 is close to 0.

As a result, the floor beam 200 has the smallest amplitude, and the ceiling beam 30 is disposed in the portion, so that the vibration of the floor can be prevented from being transmitted to the ceiling board 60.

[0050] Similarly, when the wall 70 is provided on the floor 200a as shown in Fig. 7 (bl) and Fig. 8 (al), as shown in Fig. 7 (b2) and Fig. 8 (a2), In particular, considering the vibration from the first mode to the fourth mode, it is preferable that the position of the ceiling beam 30 is 1Z4 with the distance from the wall 70 being Lib (Lib '), L2a (L2a'). The closer to the wall 70 from the wall 70, the better.

[0051] As a result, since the ceiling beam 30 is arranged in the portion where the amplitude of the floor 200 is the smallest, it is possible to suppress the vibration of the floor 200 from being transmitted to the ceiling plate 60. [0052] In addition, as shown in Fig. 8 (bl), when the wall 70 is provided under the floors 200a and 200b, as shown in Fig. 8 (b2), vibrations from the first mode to the fourth mode are particularly important. In consideration of the above, it is preferable that the ceiling beam 30 is disposed at a distance Z1 of L2b (L2b '), which is closer to the distance force from the wall 70, and is more preferable.

As a result, the floor 200 has the smallest amplitude, and the ceiling beam 30 is disposed in the portion, so that the vibration of the floor 200 can be suppressed from being transmitted to the ceiling plate 60.

Next, another example of the floor-ceiling structure 100 shown in FIG. 2 will be described. 9 (a) to 9 (d) are plan views showing other examples of the floor-ceiling structure 100. FIG.

[0055] In FIG. 9 (a), one end joist 11 is divided into two end joists 11a and l ib, and the end joists 11a and 1 lb are connected via auxiliary side joists 12a. Fig. 9 (b) shows a floor-to-ceiling structure 100a in which the side joist 12 and the end joist l ib are connected via an auxiliary side joist 12b and a plurality of anti-rollers 35 are provided in place. Fig. 9 (c) shows a floor-ceiling structure 100b in which the end joist 11 is divided into two end joists 1 la, l ib and the end joists 11a, l ib are connected via auxiliary side joists 12a One end joist 11 is divided into three end joists l ld to l If, and the end joists l ie and end joists l id, l lf are connected via auxiliary side joists 12c and 12d, Fig. 9 (d) shows one end joist 11 divided into three end joists l id ~: L lf and the end joist l ie. End joist l id, l lf is the auxiliary side Floor are connected via a thick 12c, 12d - shows a ceiling structure 100d. In these floor-ceiling structures 100a to 100d, the auxiliary side joists 12b are not provided, and the side joists 12 may be extended, or the auxiliary side joists 12a, 12c, 12d The floor joist 20 may be extended.

[0056] FIG. 9 (&) to FIG. 9 (as shown in (1), floor-to-ceiling structure 100 & to 100 (1 is not limited to a rectangular shape as shown in FIG. Even in these cases, the vibration transmitted to the ceiling can be reduced by providing the ceiling beam 30 only in the vicinity of the wall 70. It should be noted that a plurality of anti-rolling 35 In the present embodiment, this has the same function as the end joist 11.

[0057] When at least five floor joists 20 are arranged between the walls 70, the ceiling beam 30 is provided within the range from each wall 70 to the second floor joist 20. Prefer to be That's right. In this way, since the ceiling beam 30 is provided in the vicinity of the wall 70, the large amplitude of the floor board 50 is not transmitted to the ceiling board 60, and vibration can be reduced.

[0058] In the present embodiment, it is described that a wall exists over the entire length of the side joists 12 and floor joists 20, but the present invention is not limited to this, and a window or door in a building of a structure is not limited to this. The same effect can be obtained even if it exists in a part of the wall. Moreover, it is not limited to the wall, and may be supported by any other separate member, such as a pillar.

[0059] As described above, in the floor-ceiling structure according to the present invention, when force is applied to the floor 200 and vibration is generated, vibration is transmitted to the frame composed of the end joists 11 and the side joists 12. The Since one or more joists of the joist group composed of a pair of side joists 12 and a plurality of floor joists 20 are supported by the wall 70, the joists supported by the wall 70 in the frame body are supported. The vibration at the position corresponding to is reduced, and the vibration away from the position force is increased. Therefore, since the vibration of the ceiling beam 30 can be reduced by providing the ceiling beam 30 only in the vicinity of the wall 70, the vibration transmitted from the floor board 50 to the ceiling board 60 can be reduced. .

As a result, it is possible to reduce the impact noise in the frequency band with a simple structure. In particular, since the heavy floor impact sound contributes greatly to the solid propagation component, the heavy floor impact sound can be reduced by reducing the vibration of the ceiling beam 30.

[0061] <Example A>

(Examples 1 to 3)

In Examples 1-3, when the ceiling beam 30 is provided within the distance LZ4 from the wall 70 (see FIG. 13 (a)), the ceiling beam 30 is provided within the distance LZ6 from the wall 70. If the ceiling beam 30 is installed within the distance LZ8 from the wall 70 (see Fig. 13 (b)) (see Fig. 13 (c)), the vibration transfer rate from all floors to the ceiling A simulation was performed.

[0062] As a simulation condition, the vibration of the ceiling board when one point on the upper surface of the floor board was vibrated was calculated by the finite element method. As the excitation point, the excitation point that produced the largest heavy floor impact sound when the heavy floor impact sound was tested in the conventional structure based on JIS A1418 was selected. For the ceiling vibration, the sum of the vibration velocities at multiple points arranged almost evenly was used as the representative value. [0063] (Comparative Example 1)

As Comparative Example 1, a simulation was performed using the floor force of the conventional structure (see Fig. 13 (d)) with ceiling beams 30 on the entire floor-ceiling structure (see Fig. 13 (d)) and the transmissibility of vibration to the ceiling.

FIG. 10 is a diagram showing vibration transmissibility from the floor to the ceiling in Examples 1 to 3 and Comparative Example 1.

[0065] In Fig. 10, the vertical axis represents the vibration transmissibility (dB), and the horizontal axis represents the frequency (Hz). Here, the vibration transmissibility (dB) is a logarithm of the ceiling board vibration speed representative value divided by the floor board excitation point vibration speed.

[0066] <Evaluation>

As shown in Fig. 10, in the frequency band (50 Hz band (44.7 Hz to 56.2 Hz)) that generally determines the L class of heavy floor impact sound, Comparative Example 1, Example 1, Example 2, Example 3 It was confirmed that the vibration transmission rate was reduced in the order of. Therefore, it was confirmed that the reduction of the ceiling vibration increases in the order of the distance from the wall 70, LZ4, LZ6, LZ8.

[0067] <Example B>

Next, under the same conditions as in Example 3 and Comparative Example 1, heavy floor impact sound and light floor impact sound were measured based on JIS A1418.

FIG. 11 and FIG. 12 are diagrams showing measurement results of heavy floor impact sound and light floor impact sound.

[0069] The vertical axis in Fig. 11 represents the heavy floor impact sound level (5dBZgrid), the vertical axis in Fig. 12 represents the light floor impact sound level (5dBZgrid), and the horizontal axis in Figs. 11 and 12 represents the lZl octave band. Indicates the center frequency (Hz).

[0070] As shown in FIG. 11, Example 3 can confirm a reduction of about 5 dB in the heavy floor impact sound level in the frequency range of 63 Hz band or more and lk Hz band or less compared to Comparative Example 1. Came. In addition, a reduction of 10dB was achieved in the 2kHz and 4kHz bands.

On the other hand, as shown in FIG. 12, Example 3 can achieve a 3 dB reduction in light floor impact sound level in the 63 Hz and 125 Hz bands compared to Comparative Example 1, and the 250 Hz band. As a result, a reduction of 2 dB was confirmed within the range below the 4 kHz band.

[0072] In the floor-ceiling structure according to the present invention, the floor board 50 corresponds to the floor board, and the floor joist 20 corresponds to the floor joist. The side joist 12 corresponds to the side joist, the end joist 11 corresponds to the end joist, the ceiling beam 30 corresponds to the ceiling beam, the ceiling panel 60 corresponds to the ceiling panel, and the floor-ceiling structure 100 corresponds to the floor-ceiling structure, wall 70 corresponds to the wall, suspension member 31 corresponds to the suspension member, field edge 33 corresponds to the field edge, field edge receiver 32 corresponds to the field edge receiver .

[0073] In the embodiment, the ceiling beam 30 is provided only in the vicinity of the wall 70. For example, the ceiling beam 30, the suspension member 31, the field receiver 32, and the field Even if at least one of the edges 33 is not provided in a region other than the vicinity of the wall 70, vibration transmitted from the floor board 50 to the ceiling board 60 can be reduced.

For example, even if the ceiling beam 30 is provided in a region other than the vicinity of the wall 70, the suspension member 31 may not be provided in a region other than the vicinity of the wall 70. Alternatively, even if the ceiling beam 30 and the suspension member 31 are provided in an area other than the vicinity of the wall 70, the field edge receiver 32 or the field edge 33 must be provided in an area other than the vicinity of the wall 70.

[0075] Further, in an area other than the vicinity of the wall 70, at least one of the ceiling beam 30, the suspension member 31, the field edge 32, and the field edge 33 is not connected to the other, and one of them is The vibration transmitted from the floor board 50 to the ceiling board 60 can be reduced even if it can be independently displaced while being separated from the others. That is, only in the area near the wall 70, the ceiling beam 30, the suspension member 31, the field edge receiver 32, and the field edge 33 need only be connected.

In the above-described embodiments and modifications, the field edge receiver 32 can be omitted, and the field edge 33 may be directly attached to the suspension member 31.

[0077] As described above, the floor-to-ceiling structure according to the first invention is a floor-to-ceiling structure between the upper floor board and the lower floor ceiling board, and is arranged in a specific direction in a state of being substantially parallel to each other. A plurality of floor joists arranged, a side joist arranged at a position sandwiching the floor joists from the specific direction in a state of being arranged substantially parallel to the floor joists, and the floor joists orthogonal to the specific direction An end joist which is disposed at a position sandwiched from the direction and to which the end portions of the side joists and the floor joists are fixed, and a ceiling beam for suspending the ceiling board, and straddles the end joists A ceiling beam disposed substantially in parallel with the joist, and at least one joist group of the joists comprising the side joists and the plurality of floor joists is supported by the wall of the upper floor or the lower floor. The ceiling beam is provided only in the vicinity of the wall.

In the floor-to-ceiling structure according to the first invention, the floor joists are installed in the end joists and are substantially parallel to the side joists in the frame of the side joists and the end joists. In addition, a ceiling beam is installed in the end joist in a frame composed of the side joists and the end joists and is substantially parallel to the side joists. At least one joist group of side joists and floor joists is supported by the wall, and the ceiling beam is provided only near the wall.

[0079] Here, when a force is applied to the floor board and vibration is generated, the vibration is transmitted to a frame made of side joists and end joists. Since at least one joist of the joist group is supported by the wall, the vibration at the position corresponding to the joist supported by the wall in the frame body is reduced, and the vibration at the position where the position force is also increased. . Therefore, by providing the ceiling beam only in the vicinity of the wall, the vibration of the ceiling beam can be reduced, so that the vibration transmitted from the floor panel to the ceiling panel can be reduced.

As a result, it is possible to reduce the impact noise in the frequency band with a simple structure. In particular, heavy floor impact noise can be greatly reduced by reducing the vibration of the ceiling beam because the solid propagation component contributes more than the air propagation component in such a structure.

[0081] The joist group composed of the side joists and the plurality of floor joists are arranged at positions separated from the joists supported by the first wall of the upper floor or the lower floor and the first walls. The ceiling beam is provided in the vicinity of each wall in the region between the first wall and the second wall, which is supported by the second wall of the upper floor or the lower floor. It is preferable that the distance between the wall force and the ceiling beam in the vicinity thereof is 1Z4 or less of the distance between the first wall and the second wall.

[0082] In this case, each wall force has a distance to the ceiling beam in the vicinity of 1Z4 or less of the distance between the first wall and the second wall. In the case of vibration in primary mode or secondary mode, the ceiling beam is not placed on the vibration antinode (maximum amplitude portion), but is provided near the vibration node (minimum amplitude portion). Vibration transmitted from the ceiling to the ceiling can be reduced.

[0083] The joist group composed of the side joists and the plurality of floor joists is the upper floor or the lower floor joists. A floor joist supported by the first wall of the floor and a joist supported by the second wall of the upper floor or the lower floor disposed at a position spaced apart from the first wall. The beam is provided in the vicinity of each wall in the region between the first wall and the second wall, and the distance between the wall force and the ceiling beam in the vicinity thereof is determined by the first wall. The distance between the first wall and the second wall is preferably 1Z6 or less.

[0084] In this case, each wall force has a distance to the nearby ceiling beam of 1Z6 or less of the distance between the first wall and the second wall. In the case of vibration in the primary, secondary or tertiary mode, the ceiling beam is not placed on the vibration antinode (maximum amplitude portion), but is provided near the vibration node (minimum amplitude portion). Vibration transmitted from the ceiling to the ceiling can be reduced.

[0085] The joist group composed of the side joists and the plurality of floor joists are arranged at positions separated from the joists supported by the first wall of the upper floor or the lower floor and the first walls. The ceiling beam is provided in the vicinity of each wall in the region between the first wall and the second wall, which is supported by the second wall of the upper floor or the lower floor. It is preferable that the distance between the wall force and the ceiling beam in the vicinity thereof is 1Z8 or less of the distance between the first wall and the second wall.

[0086] In this case, each wall force has a distance to the ceiling beam in the vicinity of 1Z8 or less of the distance between the first wall and the second wall. In the case of vibration in the 1st to 4th modes, the ceiling beam is not placed on the vibration antinode (maximum amplitude part), but is provided near the vibration node (minimum amplitude part). The transmitted vibration can be reduced.

[0087] Between the first wall and the second wall, at least five floor joists are arranged, and the ceiling beam is within a range up to the second floor joists of each wall force. It is preferable that it is provided.

In this case, since the ceiling beam is provided at a position close to the wall, a large amplitude of the floor board is not transmitted to the ceiling board, and vibration can be reduced.

[0089] The floor-ceiling structure according to the second invention is a plurality of floor-to-ceiling structures arranged in a specific direction in a state of being substantially parallel to each other in the floor-to-ceiling structure between the upper floor board and the lower floor board. The floor joists and this A side joist disposed at a position sandwiching the floor joist from the specific direction in a state of being arranged substantially parallel to the floor joists, and a position sandwiching the floor joist from a direction orthogonal to the specific direction, An end joist to which end portions of the side joists and the floor joists are fixed, and a ceiling support portion for suspending the ceiling board from the end joists, and is configured by the side joists and the plurality of floor joists At least one joist in the joist group is supported by the wall of the upper floor or the lower floor, and the ceiling support portion is a ceiling beam disposed across the end joists and is suspended from the ceiling beam. A suspension member installed, a field receiver attached to the suspension member, and a field edge attached to the field receiver to which the ceiling plate is fixed, and in a region other than the vicinity of the wall, Of the ceiling beams, suspension members, field guards, field edges At least one is provided.

[0090] In the floor-ceiling structure according to the second aspect of the invention, the floor joists are installed in the end joists and are substantially parallel to the side joists in the frame having side joists and end joists. In addition, a ceiling support is installed on the end joist in a frame made up of side joists and end joists. At least one joist group composed of side joists and floor joists is supported by the wall, and the ceiling support section includes a ceiling beam, a suspension member, a field edge receiver, and a field edge, In areas other than the vicinity of the wall, at least one of the ceiling beams, suspension members, field edges, and field edges is not provided.

Here, when force is applied to the floor board and vibration is generated, the vibration is transmitted to the frame body including the side joists and the end joists. Because at least one joist in the joist group is supported by the wall

The vibration at the position corresponding to the joist supported by the wall in the frame body is reduced, and the vibration at a position away from the position force is increased. Therefore, by not providing at least one of the ceiling beam, the suspension member, the field receiver, and the field edge that constitute the ceiling support part in the area other than the vicinity of the wall, the floor panel force is also transmitted to the ceiling panel. Can be reduced. Therefore, it is possible to reduce impact noise in a wide frequency band with a simple structure. In particular, the heavy floor impact sound has a greater contribution of the solid propagation component than the air propagation component in such a structure, so at least one of the ceiling beam, the suspension member, the field receiver, and the field edge is present in the large amplitude part.

A great reduction effect can be obtained by reducing vibration without providing one.

[0092] The floor-ceiling structure according to the third aspect of the invention is a floor-ceiling structure between an upper floor board and a lower floor board, and is arranged in a specific direction in a state of being substantially parallel to each other. The floor joists and this A side joist disposed at a position sandwiching the floor joist from the specific direction in a state of being arranged substantially parallel to the floor joists, and a position sandwiching the floor joist from a direction orthogonal to the specific direction, An end joist to which end portions of the side joists and the floor joists are fixed, and a ceiling support portion for suspending the ceiling board from the end joists, and is configured by the side joists and the plurality of floor joists At least one joist in the joist group is supported by the wall of the upper floor or the lower floor, and the ceiling support portion is a ceiling beam disposed across the end joists and is suspended from the ceiling beam. A suspension member provided, a field receiver attached to the suspension member, and a field edge attached to the field receiver and to which the ceiling plate is fixed, and in a region other than the vicinity of the wall, A small number of ceiling beams, suspension members, field guards, field edges At least one is linked to the other!

[0093] In the floor-ceiling structure according to the third aspect of the invention, the floor joists are installed in the end joists and are substantially parallel to the side joists in the side joists and end joists. In addition, a ceiling support is installed on the end joist in a frame made up of side joists and end joists. At least one joist among the joists made of side joists and multiple floor joists is supported by the wall. The ceiling support section includes ceiling beams, suspension members, field edges, and field edges, and at least one of the ceiling beams, suspension members, field edges, and field edges in areas other than the vicinity of the wall. Not connected to

Here, when a force is applied to the floor board and vibration is generated, the vibration is transmitted to the frame composed of the side joists and the end joists. Since at least one joist of the joist group is supported by the wall, the vibration at the position corresponding to the joist supported by the wall in the frame body is reduced, and the vibration at the position where the position force is also increased. . Therefore, in areas other than the vicinity of the wall, the floor board force is reduced by not connecting at least one of the ceiling beam, the suspension member, the field receiver, and the field edge constituting the ceiling support part to the other. Vibration transmitted to the ceiling can be reduced. Therefore, it is possible to reduce impact noise in a wide frequency band with a simple structure. In particular, the heavy floor impact sound contributes more to the solid propagating component than the air propagating component in such a structure, so at least one of the ceiling beam, the suspension member, the field receiver, and the field edge in the large amplitude portion. A great reduction effect can be obtained by reducing vibration without connecting one to the other. [0095] The floor-ceiling structure according to the fourth invention is a plurality of floor-to-ceiling structures arranged in a specific direction in a state of being arranged substantially parallel to each other in the floor-to-ceiling structure between the upper floor board and the lower floor board. Floor joists, side joists arranged at positions sandwiching the floor joists from the specific direction in a state of being arranged substantially parallel to the floor joists, and the floor joists from the direction orthogonal to the specific directions An end joist disposed at a position, to which end portions of the side joists and the floor joists are fixed, and a ceiling support portion for suspending the ceiling plate from the end joists, the side joists and the plurality of the plural joists At least one joist in the joist group composed of floor joists is supported by the wall of the upper floor or the lower floor, and the ceiling support section includes a ceiling beam disposed across the end joists, and A suspension member suspended from the ceiling beam, and a front member attached to the suspension member And a ceiling joist for the ceiling board is fixed, in a region other than the vicinity of the wall, the ceiling beams, hanging member, and at least one is provided among the ceiling joist, Do, is intended.

[0096] In the floor-ceiling structure according to the fourth aspect of the present invention, the floor joist is installed in the end joist and substantially parallel to the side joist in a frame body having side joists and end joists. In addition, a ceiling support is installed on the end joist in a frame made up of side joists and end joists. At least one joist among the joists made of side joists and multiple floor joists is supported by the wall. The ceiling support portion includes a ceiling beam, a suspension member, and a field edge, and at least one of the ceiling beam, the suspension member, and the field edge is provided in a region other than the vicinity of the wall.

Here, when a force acts on the floor board and vibration is generated, the vibration is transmitted to the frame body including the side joists and the end joists. Because at least one joist in the joist group is supported by the wall

The vibration at the position corresponding to the joist supported by the wall in the frame body is reduced, and the vibration at a position away from the position force is increased. Therefore, by not providing at least one of the ceiling beam, the suspension member, and the field edge that constitute the ceiling support part in a region other than the vicinity of the wall, the floor plate force can also reduce the vibration transmitted to the ceiling plate. Can do. Therefore, it is possible to reduce impact noise in a wide frequency band with a simple structure. In particular, the heavy floor impact sound has a greater contribution of the solid propagation component than the air propagation component in such a structure, so do not provide at least one of the ceiling beam, the suspension member, or the field edge in a portion with a large amplitude. A significant reduction effect can be obtained by reducing vibration.

[0098] The floor-ceiling structure according to the fifth aspect of the invention is a floor-ceiling structure between an upper floor board and a lower floor board. In manufacturing, a plurality of floor joists arranged in a specific direction in a state of being arranged substantially parallel to each other, and arranged so as to sandwich the floor joists from the specific direction in a state of being arranged substantially in parallel with these floor joists. A side joist and an end joist which is disposed at a position sandwiching the floor joist from a direction orthogonal to the specific direction, and to which end portions of the side joist and the floor joist are fixed, and the ceiling board is suspended from the end joist. A ceiling support part for lowering, and at least one joist of the joist group composed of the side joists and the plurality of floor joists is supported by a wall of the upper floor or the lower floor, and the ceiling support The section includes a ceiling beam arranged across the joist, a suspension member suspended from the ceiling beam, and a field edge attached to the suspension member and to which the ceiling plate is fixed. , In the area other than the vicinity of the wall, the ceiling beam, At least one of the suspension members or field edges is connected to the other.

[0099] In the floor-ceiling structure according to the fifth aspect of the invention, the floor joists are installed in the end joists and are substantially parallel to the side joists in the frame of the side joists and end joists. In addition, a ceiling support is installed on the end joist in a frame made up of side joists and end joists. At least one joist group is composed of side joists and floor joists. In addition, the ceiling support part includes a ceiling beam, a suspension member, and a field edge, and at least one of the ceiling beam, the suspension member, and the field edge is not connected to the other in an area other than the vicinity of the wall.

[0100] Here, when force is applied to the floor board and vibration is generated, the vibration is transmitted to the frame composed of the side joists and the end joists. Since at least one joist of the joist group is supported by the wall, the vibration at the position corresponding to the joist supported by the wall in the frame body is reduced, and the vibration at the position where the position force is also increased. . Therefore, in areas other than the vicinity of the wall, the floor board force is reduced by not connecting at least one of the ceiling beam, the suspension member, the field receiver, and the field edge that constitute the ceiling support part to the other. Vibration transmitted to the ceiling plate can be reduced. Therefore, it is possible to reduce impact noise in a wide frequency band with a simple structure. In particular, heavy floor impact sound has a greater contribution of solid-propagating components than air-propagating components in such a structure, so at least one of ceiling beams, suspension members, and field edges is used in areas with large amplitudes. A great reduction effect can be obtained by reducing the vibration without connecting it to the others.

Claims

The scope of the claims

[1] In the floor-to-ceiling structure between the upper floor and the lower floor,

A plurality of floor joists arranged in a specific direction in a state of being arranged substantially parallel to each other, and side joists arranged in a position sandwiching the floor joists from the specific direction in a state of being arranged substantially in parallel with these floor joists, The floor joists are arranged at positions sandwiching the direction of the floor joists from the direction orthogonal to the specific direction, and the side joists and the end joists of the floor joists are fixed, and the ceiling beams for suspending the ceiling board. A ceiling beam disposed across the end joist and substantially parallel to the side joist,

At least one joist of the joist group composed of the side joists and the plurality of floor joists is supported by the wall of the upper floor or the lower floor,

The floor-ceiling structure characterized in that the ceiling beam is provided only in the vicinity of the wall.

[2] The joist group composed of the side joists and the plurality of floor joists are arranged at positions separated from the joists supported by the first wall of the upper floor or the lower floor and the first walls. The ceiling beam is provided in the vicinity of each wall in the region between the first wall and the second wall, which is supported by the second wall of the upper floor or the lower floor. And

The floor-ceiling according to claim 1, wherein the distance from each wall to the ceiling beam in the vicinity thereof is 1Z4 or less of the distance between the first wall and the second wall. Construction.

[3] The joist group composed of the side joists and the plurality of floor joists are arranged at positions separated from the joists supported by the first wall of the upper floor or the lower floor and the first walls. The ceiling beam is provided in the vicinity of each wall in the region between the first wall and the second wall, which is supported by the second wall of the upper floor or the lower floor. And

The floor-ceiling according to claim 1, wherein a distance from each wall to the ceiling beam in the vicinity thereof is 1Z6 or less of a distance between the first wall and the second wall. Construction.

[4] The joist group composed of the side joists and the plurality of floor joists are arranged at positions separated from the joists supported by the first wall of the upper floor or the lower floor and the first walls. The ceiling beam is provided in the vicinity of each wall in the region between the first wall and the second wall, which is supported by the second wall of the upper floor or the lower floor. And The floor-ceiling according to claim 1, wherein a distance from each wall to the ceiling beam in the vicinity thereof is 1Z8 or less of a distance between the first wall and the second wall. Construction.

[5] The joist group composed of the side joists and the plurality of floor joists are arranged at positions separated from the joists supported by the first wall of the upper floor or the lower floor and the first walls. The ceiling beam is provided in the vicinity of each wall in the region between the first wall and the second wall, which is supported by the second wall of the upper floor or the lower floor. And

At least five floor joists are arranged between the first wall and the second wall, and the ceiling beam is provided in a range from each wall to the second floor joists. The floor-ceiling structure according to claim 1, wherein the floor-ceiling structure is provided.

[6] In the floor-to-ceiling structure between the upper floor and the lower floor,

A plurality of floor joists arranged in a specific direction in a state of being arranged substantially parallel to each other, and side joists arranged in a position sandwiching the floor joists from the specific direction in a state of being arranged substantially in parallel with these floor joists, A floor joist disposed at a position sandwiching the floor joist from a direction orthogonal to the specific direction, and an end joist to which the end of the side joist and the floor joist is fixed, and a ceiling for suspending the ceiling board from the end joist A support portion,

The ceiling support section includes a ceiling beam disposed across the end joists, a suspension member suspended from the ceiling beam, a field receiver attached to the suspension member, and a connection to the field receiver. And has a field edge to which the ceiling board is fixed,

A floor-ceiling structure characterized in that at least one of the ceiling beam, suspension member, field edge receiver, and field edge is not provided in an area other than the vicinity of the wall.

[7] In the floor-to-ceiling structure between the upper floor and the lower floor,

A plurality of floor joists arranged in a specific direction in a state of being arranged substantially parallel to each other, and side joists arranged in a position sandwiching the floor joists from the specific direction in a state of being arranged substantially in parallel with these floor joists, A floor joist disposed at a position sandwiching the floor joist from a direction orthogonal to the specific direction, and an end joist to which the end of the side joist and the floor joist is fixed, and a ceiling for suspending the ceiling board from the end joist A support portion, At least one joist of the joist group composed of the side joists and the plurality of floor joists is supported by the wall of the upper floor or the lower floor,

In a region other than the vicinity of the wall, the floor-ceiling structure is characterized in that at least one of the ceiling beam, the suspension member, the field edge receiver, and the field edge is connected to the other.

[8] In the floor-to-ceiling structure between the upper floorboard and the lower floorboard,

The ceiling support section includes a ceiling beam arranged across the end joists, a suspension member suspended from the ceiling beam, a field edge attached to the suspension member and to which the ceiling plate is fixed; Have

The floor-ceiling structure is characterized in that at least one of the ceiling beam, the suspension member, and the field edge is not provided in an area other than the vicinity of the wall.

[9] In the floor-to-ceiling structure between the upper floor and the lower floor,

At least one joist of the joist group composed of the side joists and the plurality of floor joists is supported by the wall of the upper floor or the lower floor, The ceiling support portion includes a ceiling beam disposed across the end joists, a suspension member suspended from the ceiling beam, a field edge attached to the suspension member and to which the ceiling plate is fixed; Have

In a region other than the vicinity of the wall, at least one of the ceiling beam, the suspension member, and the field edge is connected to the other, and the floor-ceiling structure is characterized in that.