Ceiling and partition wall construction

Abstract

To provide a fitting structure of a ceiling and a partition wall that can sufficiently exhibit a vibration suppression effect of the ceiling expected from a dynamic damper and can effectively reduce a floor impact sound transmitted to the ceiling, by ensuring a free vibration of the ceiling and its structural members, on fitting of the ceiling and the partition wall where the partition wall is erected below the ceiling.SOLUTION: There is provided a fitting structure 80A of a ceiling 10 including a ceiling backing material 11 and ceiling surface materials 15, 16 fixed to its undersurface, and a partition wall 60 erected below the ceiling 10. A surface facing a ceiling space of the ceiling 10 is mounted with dynamic dampers 20. The partition wall 60 penetrates the ceiling 10 suspended through a suspending jig 40 from a beam 30.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a fitting structure for a ceiling and partition walls.

Background Art

[0002] The floor impact sound from the upper floor of a building is transmitted downward to the ceiling of the lower floor through the vibration of the upper floor, and the ceiling of the lower floor is excited and radiated to the lower floor. Note that this floor impact sound includes heavy floor impact sound and lightweight floor impact sound.

[0003] In order to reduce the floor impact sound from the upper floor, a dynamic damper may be installed on the surface of the ceiling facing the ceiling space. The dynamic damper includes a mass body (weight) and an elastic body (spring), and is installed on the ceiling in a state tuned to the natural frequency of the entire ceiling, the ceiling base material or the ceiling surface material constituting the ceiling. By vibrating the dynamic damper instead of the ceiling, the vibration of each component of the ceiling can be suppressed.

[0004] By the way, when a partition wall is erected below the ceiling and a part of the ceiling is supported from below by the partition wall, due to the restraint by the partition wall, it becomes difficult for the free vibration of the ceiling and its components to occur when the floor impact sound acts on the ceiling. In this case, the vibration frequency of the ceiling and its components generally increases compared to the natural frequency during free vibration, and the vibration frequency of the tuned dynamic damper deviates from the vibration frequency of the ceiling and its components, leading to a reduction in the vibration suppression effect of the ceiling by the dynamic damper.

[0005] From the above, in the fitting of the ceiling and partition walls where a partition wall is erected below the ceiling, a fitting structure for the ceiling and partition walls is desired in which the free vibration of the ceiling and its components is ensured, and the vibration suppression effect of the ceiling expected from the dynamic damper is fully exhibited.

[0006] Here, Patent Document 1 proposes a building ceiling structure that can suppress floor impact noise. Specifically, the system comprises multiple first furring strip supports (3) suspended from floor beam members (1) of the upper floors of the building via vibration-damping hangers (2) for reducing lightweight floor impact sound, multiple second furring strip supports (4) arranged substantially parallel to the first furring strip supports (3) without being suspended from the floor beam members (1), multiple furring strips (5) attached substantially perpendicular to the first and second furring strip supports (3)(4), and ceiling boards (8) attached to the underside of these furring strips (5). Dynamic dampers (30) for reducing heavy floor impact sound are pre-installed only in the second furring strip supports (4) of the first and second furring strip supports (3)(4), and several types of second furring strip supports (4) of different lengths are selectively combined and arranged according to the shape and size of the ceiling surface. [Prior art documents] [Patent Documents]

[0007] [Patent Document 1] Japanese Patent Publication No. 2012-12829 [Overview of the project] [Problems that the invention aims to solve]

[0008] The building ceiling structure described in Patent Document 1 does not assume restraint by partition walls erected below the ceiling. As a result, a portion of the ceiling is restrained from below by the partition walls, making it difficult for the ceiling and its components to vibrate freely. Consequently, it is difficult to prevent a reduction in the vibration suppression effect of the dynamic damper on the ceiling.

[0009] The present invention has been made in view of the above problems, and aims to provide a ceiling-partition wall fitting structure that, in a ceiling-partition wall fitting where a partition wall is erected below the ceiling, can fully exert the vibration suppression effect of the ceiling expected from a dynamic damper, thereby effectively reducing floor impact sound transmitted to the ceiling, by ensuring the free vibration of the ceiling and its constituent members. [Means for solving the problem]

[0010] To achieve the above objective, one embodiment of the ceiling and partition wall fitting structure according to the present invention is: A fitting structure for a ceiling having a ceiling base material and a ceiling surface material fixed to its underside, and a partition wall erected below the ceiling, A dynamic damper is installed on the surface of the aforementioned ceiling facing the ceiling space. The partition wall is characterized by penetrating the ceiling, which is suspended from the beam via a suspension jig.

[0011] According to this embodiment, by having a so-called partition wall-dominant configuration in which a partition wall penetrates a ceiling that is suspended from a beam via a suspension jig, the ceiling is no longer constrained from below by the partition wall, and the free vibration of the ceiling and its components can be guaranteed. As a result, the discrepancy between the vibration frequency of the dynamic damper, which is tuned to the natural frequency of the entire ceiling and its components (ceiling substrate material or ceiling surface material, etc.), and the vibration suppression effect of the dynamic damper on the ceiling can be fully exerted, and floor impact sound transmitted to the ceiling can be effectively reduced.

[0012] The upper end of the partition wall that penetrates the ceiling is fixed to, for example, a beam in the ceiling space, and the end of the ceiling on the partition wall side is suspended via a suspension jig fixed to this beam, thereby maintaining a stable position between the upper end of the partition wall and the end of the ceiling, which are separated from each other. Here, there can be a form with no gap between the end of the partition wall and the end of the ceiling, or a form with a clearance of, for example, a few millimeters, but a small clearance is preferable because it allows for complete separation of the two.

[0013] Furthermore, another embodiment of the ceiling and partition wall fitting structure according to the present invention is: A fitting structure for a ceiling having a ceiling base material and a ceiling surface material fixed to its underside, and a partition wall erected below the ceiling, A dynamic damper is installed on the surface of the aforementioned ceiling facing the ceiling space. An upper runner, which has a U-shape in cross-section, is installed on the aforementioned ceiling surface material, and comprises an upper piece and hanging pieces extending downward from the left and right ends of the upper piece. The partition wall is characterized in that it is fixed to the hanging piece while having a clearance between it and the upper piece.

[0014] According to this embodiment, in a so-called ceiling-dominant configuration in which a partition wall is fixed to an upper runner installed on the ceiling surface, the partition wall is fixed to the hanging piece constituting the upper runner with a clearance between it and the upper piece constituting the upper runner. As a result, even though it is a ceiling-dominant configuration, the ceiling is not constrained from below by the partition wall, and the free vibration of the ceiling and its components can be guaranteed. This eliminates the discrepancy between the vibration frequency of the dynamic damper, which is tuned to the natural frequency of the entire ceiling and its components, and the vibration suppression effect of the dynamic damper on the ceiling can be fully exerted, making it possible to effectively reduce floor impact sound transmitted to the ceiling.

[0015] Even though there is a clearance between the upper piece of the upper runner, which is fixed to the ceiling, and the upper end of the partition wall, the partition wall is fixed to the hanging piece of the upper runner, so that the ceiling is not pushed up (restrained) by the partition wall below, and the stable position above the partition wall can be maintained. Here, the clearance between the upper end of the partition wall and the upper piece of the upper runner can be set to a few millimeters to about 10-20 millimeters.

[0016] Furthermore, in another embodiment of the ceiling and partition wall fitting structure according to the present invention, The aforementioned partition wall is equipped with studs and partition panels, The stud is arranged inside the upper runner, and partition panels are arranged outside the left and right hanging pieces, respectively. The stud and the partition panel are both fixed to the hanging piece while maintaining the clearance between them and the upper piece.

[0017] According to this embodiment, both the studs and the partition panels constituting the partition wall are fixed to the hanging pieces constituting the upper runner, with a clearance between them and the upper pieces constituting the upper runner fixed to the ceiling. This allows for a stable upward position of both the studs and the partition panels, even though there is a clearance between the upper pieces constituting the upper runner fixed to the ceiling and the upper end of the partition wall.

[0018] Furthermore, in another embodiment of the ceiling and partition wall fitting structure according to the present invention, The area of ​​the ceiling on the exterior wall side is suspended from the beam via a suspension jig. The end face of the ceiling on the exterior wall side is characterized in that it abuts against the inner surface of the exterior wall.

[0019] According to this embodiment, the area of ​​the ceiling on the exterior wall side is suspended from the beam via a suspension jig, and the end face of the ceiling on the exterior wall side is in contact with the inner surface of the exterior wall. As a result, the ceiling is not constrained by either the partition wall or the exterior wall, and the free vibration of the ceiling and its constituent members can be more effectively guaranteed.

Advantages of the Invention

[0020] As can be understood from the above description, according to the fitting structure of the ceiling and partition wall of the present invention, by ensuring the free vibration of the ceiling and its components, the vibration suppression effect of the ceiling expected of the dynamic damper can be fully exerted, and the floor impact sound propagated to the ceiling can be effectively reduced.

Brief Description of the Drawings

[0021] [Figure 1] It is a longitudinal sectional view of an example of the fitting structure of the ceiling and partition wall according to the first embodiment. [Figure 2] It is a longitudinal sectional view of an example of the fitting structure of the ceiling and outer wall. [Figure 3] It is a longitudinal sectional view of an example of the fitting structure of the ceiling and partition wall according to the second embodiment.

Modes for Carrying Out the Invention

[0022] Hereinafter, the fitting structure of the ceiling and partition wall according to each embodiment will be described with reference to the accompanying drawings. In the present specification and drawings, substantially the same components may be denoted by the same reference numerals, and redundant descriptions may be omitted.

[0023] [Fitting Structure of Ceiling and Partition Wall According to the First Embodiment] First, referring to FIG. 1, an example of the fitting structure of the ceiling and partition wall according to the first embodiment will be described. Here, FIG. 1 is a longitudinal sectional view of an example of the fitting structure of the ceiling and partition wall according to the first embodiment.

[0024] The fitting structure 80 of the ceiling and partition wall is a so-called ceiling-over partition fitting structure in which the partition wall 60 is attached below the horizontally extending ceiling 10.

[0025] The ceiling 10 has a ceiling base material 11 (ceiling base panel frame) and two ceiling surface materials

[0026] The ceiling base material 11 is composed of a plurality of furring strips 12 made of lightweight steel channel steel with lips, and a plurality of furring strip supports 13 similarly made of lightweight steel channel steel. The plurality of furring strips 12 are arranged at predetermined intervals so that their longitudinal directions are parallel to each other, and the plurality of furring strip supports 13 are arranged at predetermined intervals so that their longitudinal directions are perpendicular to the furring strips 12 and parallel to each other, and are fixed to the furring strips with fixing means such as screws (not shown). The ceiling base panel frame 11 may be assembled in a factory and transported to the site for installation, or it may be assembled on site. Here, the ceiling base material 11 may be a lightweight steel ceiling base material, or it may be a wooden ceiling base material formed by assembling wooden battens in a grid pattern.

[0027] Both ceiling panels 15 and 16 are made of gypsum board or the like, and the ceiling 10 (ceiling panel) is formed by attaching the ceiling panels 15 and 16 to the ceiling base material 11 with self-drilling tapping screws or the like. The ceiling panels may be made of a single panel, but having two panels improves the sound insulation performance of the ceiling. A cloth (not shown) is further attached to the underside of the ceiling panels 16, and sound insulation material 36 such as rock wool is placed on-site above the ceiling base material 11.

[0028] The floor beam 30 is made of H-shaped steel, and a fire-resistant covering material 35 is placed around the floor beam 30. A lifting jig 40 is fixed to the end of the lower flange 31 of the floor beam 80.

[0029] The suspension jig 40 has a gripping piece 41a that is L-shaped in side view and a gripping piece 41b that is roughly Z-shaped in side view, a leaf spring 42 (vibration damping means) fixed to the gripping piece 41b, a suspension bolt 43 fixed to the leaf spring 42, and a support member 44 hanging down from the suspension bolt 43, and each component is made of metal material (metal plate, steel bolt, etc.).

[0030] The suspension jig 40 is fixed to the lower flange 31 by gripping the end of the lower flange 31 with two gripping pieces 41a and 41b, and the ceiling 10 is suspended and fixed to the floor beam 30 via the suspension jig 40 by the support member 44 supporting the joist support 13 of the ceiling base material 11.

[0031] Multiple dynamic dampers 20 are installed on the upper surface (the surface facing the ceiling space) of the ceiling panel 15. Each dynamic damper 20 is formed from a metal mass 21 and a synthetic rubber elastic body 22 that elastically supports the mass 21. The dynamic dampers 20 are tuned to vibrate in sync with the vibrations of the ceiling 10 and its constituent components, the ceiling base material 11, and the ceiling panels 15 and 16.

[0032] An upper runner 51 is fixed to the lower surface of the ceiling panel 16 by fastening means such as screws (not shown), and a lower runner 52 is similarly fixed to the floor 55, such as a base, at a position corresponding to the upper runner 51, using screws or the like. The upper runner 51 and the lower runner 52 are formed, for example, from channel steel with a U-shaped cross-section.

[0033] The partition wall 60 has steel studs 61 and partition panels 62 arranged on both sides thereof. The studs 61 are arranged inside the upper runner 51 and lower runner 52, and the partition panels 62 are arranged on both outer surfaces of the upper runner 51 and lower runner 52. Both the studs 61 and the partition panels 62 are fixed to the upper runner 51 and lower runner 52 with screws or the like. Here, the partition panels 62 are made of gypsum board or the like.

[0034] The upper runner 51 has an upper piece 51a and two hanging pieces 51b on its left and right sides, and the lower runner 52 has substantially the same configuration.

[0035] The stud 61 is fixed to the hanging piece 51b with its upper end having a clearance C1 of height t1 between it and the upper piece 51a of the upper runner 51. On the other hand, the partition panel 62 is fixed to the hanging piece 51b with its upper end having a clearance C2 of height t2 between it and the lower surface of the ceiling panel 16 (a cross fabric, not shown, attached to it).

[0036] Here, height t1 is set to a range of a few millimeters to over ten millimeters, for example, 10 mm, and height t2 is set to a range of a few millimeters, for example, 2 mm, so as not to come into contact with the cross.

[0037] According to the fitting structure 80, in a so-called ceiling-dominant configuration in which the partition wall 60 is fixed to the upper runner 51 installed on the ceiling surface material 16, the partition wall 60 is fixed to the hanging piece 51b of the upper runner 51 with clearances C1 and C2 between it and the upper piece 51a of the upper runner 51. As a result, even though it is a ceiling-dominant configuration, the ceiling 10 is not constrained from below by the partition wall 60. This makes it possible to guarantee free vibration in the vertical direction X1 of the ceiling 10 and its constituent members, the ceiling base material 11 and the ceiling surface materials 15 and 16.

[0038] By ensuring the free vibration of the ceiling 10, the discrepancy between the vibration frequency of the dynamic damper 20, which is tuned to the natural frequency of the ceiling 10 and its constituent members, and the vibration frequency of the dynamic damper 20 can be fully exerted, thereby effectively reducing floor impact sound transmitted to the ceiling 10.

[0039] Next, with reference to Figure 2, an example of a ceiling and exterior wall fitting structure will be described. Here, Figure 2 is a longitudinal cross-sectional view of an example of a ceiling and exterior wall fitting structure.

[0040] The ceiling and exterior wall fitting structure 90 shown in the diagram is a fitting structure in which the ceiling 10 is fixed via a suspension jig 45 from the floor joist 30A between the lower floor (e.g., the first floor) and the upper floor (e.g., the second floor).

[0041] The lower floor exterior wall panel 70A, as an example, comprises an exterior wall surface material 71 (exterior cladding), an insulation board 72 such as polystyrene foam, an insulation board 73 such as glass wool, an exterior wall frame 74, and a filling insulation material 75 such as glass wool that is filled inside the exterior wall frame 74. On the other hand, the upper floor exterior wall panel 70B has a similar configuration to the lower floor exterior wall panel 70A, and Figure 2 shows the exterior wall surface material 71 and insulation boards 72 and 73. These configurations of exterior wall panels 70A and 70B are examples, and various forms exist.

[0042] A portion of the lower flange 31 of the H-shaped steel forming the girders 30A overlaps with the exterior wall frame 74, a hanging jig 45 is fixed to the other part of the lower flange 31, and a base metal fitting 14 that constitutes the ceiling base material 11 is fixed to the hanging jig 45.

[0043] A horizontal batten 76 is attached to the interior side near the upper end of the exterior wall frame 74 of the lower floor's exterior wall panel 70A, and an L-shaped base metal fitting 37 is attached to the interior side of the horizontal batten 76 in an inverted L-shape. An interior wall surface material 78, such as reinforced gypsum board, is placed on the interior side of this base metal fitting 37, and the interior wall surface material 78 is fixed to the horizontal batten 76 by fastening means such as screws (not shown). In this specification, the interior wall surface material 78 is also included as part of the components of the exterior wall.

[0044] In the illustrated example of the fitting structure 90, the base metal fittings 14 constituting the ceiling base material 11 are fixed to the suspension jig 45 which is fixed to the beam 30A, and the end faces 15a and 16a of the two ceiling surface materials 15 and 16 abut against the upper part of the interior side surface of the interior wall surface material 78, resulting in a so-called interior wall-dominant configuration. In this illustrated example, in order to enhance fire resistance and sound insulation performance, a fire-resistant covering material 35 made of rock wool or the like is filled around the beam 30A, and a sound-insulating material 36 made of rock wool or the like is filled above the ceiling base material 11.

[0045] In the fitting structure 90 shown in Figure 2, the end faces 15a and 16a of the two ceiling panels 15 and 16 are in contact with the interior side surface of the interior wall panel 78. In other words, the two ceiling panels 15 and 16 are not supported from below by the interior wall panel 78. This ensures that the ceiling 10 and its constituent members, the ceiling base material 11 and the ceiling panels 15 and 16, are not supported from below in the X2 direction, which is the vertical direction.

[0046] In this way, by ensuring free vibration in the area of ​​the ceiling 10 and its constituent members on the exterior wall side, and in combination with the interior fitting structure 80 shown in Figure 1, free vibration can be guaranteed throughout the entire ceiling 10. As a result, the vibration suppression effect of the dynamic damper 20 can be fully exerted throughout the entire ceiling 10, and floor impact sound transmitted throughout the entire ceiling 10 can be effectively reduced.

[0047] [Construction of the ceiling and partition wall according to the second embodiment] Next, with reference to Figure 3, an example of the ceiling and partition wall fitting structure according to the second embodiment will be described. Here, Figure 3 is a vertical cross-sectional view of an example of the ceiling and partition wall fitting structure according to the second embodiment.

[0048] The ceiling and partition wall fitting structure 80A differs from fitting structure 80 in that the partition wall 60 penetrates the horizontally extending ceiling 10, in what is known as a partition wall-dominant fitting structure.

[0049] A suspension jig 46 is fixed to the lower flange 31 of the floor beam 30, and an upper runner 51 is fixed to the suspension jig 46. The stud 61 is fixed to the hanging piece 51b with a clearance C1 between its upper end and the upper piece 51a of the upper runner 51. On the other hand, the partition panel 62 is fixed to the hanging piece 51b with a clearance C2 between its upper end and the suspension jig 46. Furthermore, a clearance C3 is provided between the end face 10a of the ceiling 10 and the partition panel 62. Here, the clearance C3 is set to a width of several millimeters (for example, 2 mm), which is about the same as the clearance C2.

[0050] The ceiling 10 is not shown in the diagram, but for example, similar to Figure 1, it is supported by a suspension jig 40 fixed to the lower flange 31 of the floor beam 30 and hangs down from the floor beam 30 via the suspension jig 40.

[0051] According to the fitting structure 80A, in a so-called partition wall-dominant configuration in which the partition wall 60 penetrates the ceiling 10, the partition wall 60 has clearances C1 and C2 between it and the upper piece 51a and the suspension jig 46 that make up the upper runner 51, and also has a clearance C3 between it and the ceiling 10, and is fixed to the hanging piece 51b that makes up the upper runner 51. As a result, the ceiling 10 is not restrained by the partition wall 60 from below, and the free vibration in the vertical direction X1 of the ceiling 10 and its constituent members, the ceiling base material 11 and the ceiling surface materials 15 and 16, can be guaranteed. This eliminates the discrepancy between the vibration frequency of the dynamic damper 20, which is tuned to the natural frequency of the ceiling 10 and its constituent members, and the vibration suppression effect of the dynamic damper 20 on the ceiling 10 can be fully exerted, making it possible to effectively reduce floor impact sound transmitted to the ceiling 10.

[0052] In this case, even in the fitting structure 80A, by further applying the fitting structure 90 shown in Figure 2 to the exterior wall side of the ceiling 10, free vibration can be guaranteed throughout the entire ceiling 10, the vibration suppression effect of the dynamic damper 20 can be fully exerted throughout the entire ceiling 10, and floor impact sound transmitted throughout the entire ceiling 10 can be effectively reduced.

[0053] [Floor impact sound measurement test and results] The inventors set up three rooms, Room A, Room B, and Room C, and conducted an experiment to verify the combined effect of dynamic dampers in a conventional ceiling structure where the ceiling is constrained from below by a partition wall (comparative example) and in an example structure where the ceiling is not constrained by a partition wall, as shown in Figure 1 or Figure 3. In this experiment, the ceiling structure on the exterior wall side differed from the structure shown in Figure 2, and was a ceiling-dominant structure where the ceiling was constrained from below by the interior wall material. The experimental results are shown in Table 1 below.

[0054] [Table 1]

[0055] Table 1 demonstrates that in all three rooms—Room A, Room B, and Room C—releasing the constraints imposed by the partition walls in the ceiling can enhance the vibration reduction effect provided by the dynamic dampers.

[0056] Furthermore, it can be assumed that vibration reduction effects tend to be more easily accumulated in small rooms that are more susceptible to the effects of constraints imposed by exterior walls and partition walls.

[0057] Furthermore, other embodiments may be used in which other components are combined with the configurations listed in the above embodiments, and the present invention is not limited in any way to the configurations shown herein. In this regard, modifications can be made without departing from the spirit of the present invention, and can be appropriately determined according to the application form. [Explanation of symbols]

[0058] 10: Ceiling 10a: End face 11: Ceiling underlayment material (ceiling underlayment panel frame) 12: veranda 13: Ceiling joist support 14: Base metal fittings 15: First surface material (ceiling surface material) 15a: End face 16: Second surface material (ceiling surface material) 16a: End face 20: Dynamic damper 21:Mass body 22: Elastic body 30: Beam (floor beam) 30A: Beam (girder beam) 31: Lower flange 35: Fireproof covering material 36: Soundproofing material 37: Base metal fittings 40: Lifting jig 41a: Grip piece 41b: Grip piece 42: Leaf spring 43: Suspension bolt 44: Support material 45: Lifting jig 46: Lifting jig 51: Upper Runner 51a: Upper piece 51b: Hanging piece 52: Lower runner 55: Floor 60: Partition wall 61: Stud 62: Partitioning material 70: Exterior wall panels (exterior walls) 71: Exterior wall material 72,73: Insulation board 74: Exterior wall frame 75: Filling insulation 76: Horizontal battens (wall base material) 78: Interior wall surface material 80,80A: Ceiling and partition wall fitting structure (fitting structure) 90: The fitting structure of the ceiling and exterior wall (interior wall surface material)

Claims

1. A fitting structure for a ceiling having a ceiling base material and a ceiling surface material fixed to its underside, and a partition wall erected below the ceiling, A dynamic damper is installed on the surface of the aforementioned ceiling facing the ceiling space. The partition wall penetrates the ceiling, which is suspended from the beam via a suspension jig. The area of ​​the ceiling on the exterior wall side is suspended from the beam via a suspension jig. A ceiling and partition wall fitting structure characterized in that the end face of the ceiling on the exterior wall side is in contact with the inner surface of the exterior wall.

2. A fitting structure for a ceiling having a ceiling base material and a ceiling surface material fixed to its underside, and a partition wall erected below the ceiling, A dynamic damper is installed on the surface of the aforementioned ceiling facing the ceiling space. An upper runner, which has a U-shape in cross-section, is installed on the aforementioned ceiling surface material, and comprises an upper piece and hanging pieces extending downward from the left and right ends of the upper piece. The partition wall is fixed to the hanging piece with a clearance between it and the upper piece. The area of ​​the ceiling on the exterior wall side is suspended from the beam via a suspension jig. A ceiling and partition wall fitting structure characterized in that the end face of the ceiling on the exterior wall side is in contact with the inner surface of the exterior wall.

3. The aforementioned partition wall is equipped with studs and partition panels, The stud is arranged inside the upper runner, and partition panels are arranged outside the left and right hanging pieces, respectively. The ceiling and partition wall fitting structure according to claim 2, characterized in that both the stud and the partition surface material are fixed to the hanging piece while having the clearance between them and the upper piece.

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