Ceiling structure and method for constructing the ceiling structure

Abstract

To provide a ceiling structure capable of suppressing deterioration of vibration reduction performance and improving workability, and a method for constructing the ceiling structure.SOLUTION: A ceiling structure includes: a pair of edge joists arranged along both ends of a ceiling; a plurality of ceiling joists extending in a longitudinal direction of the edge joists and arranged between the pair of edge joists so as to be spaced apart from each other; a plurality of ceiling damping materials laid between the pair of ceiling joists so as to straddle the plurality of edge joists; and a plurality of film materials including a first film material for supporting an end part of the ceiling damping materials located between the edge joist and the ceiling joist adjacent to the edge joist, and a second film material for supporting the end part of the ceiling damping material located between the adjacent joists. A method for constructing the ceiling structure includes the steps of: supporting, with the first film material, the end part of the ceiling damping material located between the pair of edge joists and the ceiling joist adjacent to the edge joist; and supporting, with the second film material, the end part of the ceiling damping material located between the adjacent joists.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present invention relates to a ceiling structure provided with a ceiling vibration-damping material, and a method for constructing the ceiling structure. [Background technology]

[0002] There are ceiling structures in which ceiling vibration-damping materials are laid on ceiling base materials and ceiling boards (for example, Patent Documents 1 to 3). A ceiling structure having a ceiling base material and a ceiling board is generally called a double ceiling. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2015-148108 A [Patent Document 2] JP 2020-070641 A [Patent Document 3] JP 2017-227062 A Summary of the Invention [Problem to be solved by the invention]

[0004] Generally, there are two methods for constructing a ceiling structure equipped with ceiling vibration-damping materials:

[0005] The first construction method is to install the ceiling base material, attach some of the ceiling boards to the ceiling base material, lay the ceiling vibration-damping material on the attached ceiling boards, and repeat the process of attaching the ceiling boards and laying the ceiling vibration-damping material. However, since the ceiling board construction work is interrupted every time the ceiling vibration-damping material is laid, there is a problem that the efficiency of the construction work is reduced compared to a general double ceiling without the ceiling vibration-damping material.

[0006] The second construction method is a method in which, after constructing the ceiling base material, a ceiling vibration-damping material is laid across multiple rafters of the ceiling base material, and the ceiling board is attached after the ceiling vibration-damping material is laid on all the rafters. The second construction method is realized by lengthening the ceiling vibration-damping material as in Patent Document 1 and Patent Document 2, but there is a limit to lengthening the ceiling vibration-damping material so that one sheet of ceiling vibration-damping material can be used for a general room size. Therefore, in the second construction method, it is common to lay multiple ceiling vibration-damping materials across multiple rafters as in Patent Document 1 and Patent Document 2. In the second construction method, the ceiling board is attached after all the ceiling vibration-damping materials are laid, so there is no problem that the construction work of the ceiling board is interrupted every time the ceiling vibration-damping material is laid, as in the first construction method.

[0007] However, in the case of the second construction method, when all the ceiling damping materials are laid, the ends on both sides of each ceiling damping material hang down beyond the lower end of the rafters, so that the position of the ceiling damping material may be shifted when attaching the ceiling board, and the ceiling damping material may be laid unevenly. If the ceiling damping material is laid unevenly, the ceiling damping material does not come into contact with the ceiling board and is in a floating state, so the vibration damping effect of the ceiling damping material does not work on the ceiling board, and the vibration reduction performance of the ceiling structure is reduced. In addition, if the ends on both sides of the ceiling damping material in a hanging state are sandwiched between the rafters and the ceiling board, a step will occur in the ceiling board due to the gap between the rafters and the ceiling board. Therefore, in the second construction method, there is a problem that the construction is reduced compared to a general double ceiling without a ceiling damping material.

[0008] The present invention has been made to solve the above-mentioned problems, and aims to provide a ceiling structure that is capable of suppressing a decrease in vibration reduction performance and improving workability, and a construction method for said ceiling structure. [Means for solving the problem]

[0009] The ceiling structure of the present invention comprises a pair of edge strips arranged along both ends of the ceiling, a plurality of strips extending in the longitudinal direction of the edge strips and spaced apart between the pair of edge strips, a plurality of ceiling damping materials laid across the plurality of strips between the pair of edge strips, a first membrane material supporting the ends of the ceiling damping materials located between the edge strips and the strips adjacent to the edge strips, and a second membrane material supporting the ends of the ceiling damping materials located between the adjacent strips. According to the present invention, by supporting the ends of the ceiling damping materials with the membrane material, the ends of the ceiling damping materials can be positioned so as not to hang down from the lower ends of the edge strips or strips, and therefore, the ceiling damping materials can be prevented from being laid unevenly when attaching the ceiling board. In addition, by supporting the ends of the ceiling vibration-damping material with a membrane material, the ends of the ceiling vibration-damping material can be positioned so that they do not hang downward from the lower end of the rafter or the ceiling board, thereby preventing the ends of the ceiling vibration-damping material from becoming pinched between the rafter and the ceiling board.

[0010] In one aspect of the present invention, the plurality of membrane materials include a third membrane material that connects the ceiling damping material and the rafters on which the vicinity of the center of gravity of the ceiling damping material is laid. According to one aspect of the present invention, since the position close to the center of gravity of the ceiling damping material is temporarily fixed to the rafters, the ceiling damping material can be positioned while being stably laid on the rafters.

[0011] In one aspect of the present invention, the first membrane material, the second membrane material, and the third membrane material are foldable tapes, and the foldable tapes are arranged on the ceiling vibration damping material. According to one aspect of the present invention, cutting or pasting of temporary tapes or the like on site can be omitted.

[0012] In one aspect of the present invention, the plurality of membrane materials are thin film sheets connected between the edge siding and the siding adjacent to the edge siding, and between adjacent sidings. According to one aspect of the present invention, the end of the ceiling vibration damping material can be positioned so as not to hang down from the edge siding or the lower end of the siding.

[0013] The method for constructing a ceiling structure of the present invention is a method for constructing a ceiling structure having a pair of edge strips arranged along both ends of the ceiling, a plurality of strips extending in the longitudinal direction of the pair of edge strips and spaced apart between the pair of edge strips, and a plurality of ceiling damping materials sequentially laid across the strips in one direction between the pair of edge strips, and includes a step of supporting the end of the ceiling damping material located between the pair of edge strips and the strip adjacent to the edge strip with a first membrane material, and a step of supporting the end of the ceiling damping material located between the adjacent strips with a second membrane material. According to the present invention, by supporting the end of the ceiling damping material with a membrane material, the end of the ceiling damping material can be positioned so that it does not hang down from the lower end of the edge strip or strip, and therefore, it is possible to prevent the ceiling damping material from being laid unevenly when attaching a ceiling board. In addition, by supporting the ends of the ceiling vibration-damping material with a membrane material, the ends of the ceiling vibration-damping material can be positioned so that they do not hang downward from the lower end of the rafter or the ceiling board, thereby preventing the ends of the ceiling vibration-damping material from becoming pinched between the rafter and the ceiling board. Effect of the Invention

[0014] According to the present invention, it is possible to provide a ceiling structure that is capable of suppressing a decrease in vibration reduction performance and improving workability, and a method for constructing the ceiling structure. [Brief description of the drawings]

[0015] [Figure 1] FIG. 1 is a schematic diagram illustrating edge members and rafters in a ceiling structure according to an embodiment of the present invention, where (a) is a side view and (b) is a plan view. [Diagram 2] FIG. 2 is a schematic diagram illustrating a ceiling vibration-damping material in a ceiling structure according to an embodiment of the present invention, where (a) is an oblique view of a ceiling vibration-damping material having nine bags, and (b) is an oblique view of a ceiling vibration-damping material having three bags. [Diagram 3]FIG. 3 is a plan view showing an example of the arrangement of membrane materials in a ceiling structure according to an embodiment of the present invention, where (a) is an example of the arrangement in a ceiling vibration-damping material having nine bags, and (b) to (d) are other examples of the arrangement in a ceiling vibration-damping material having nine bags. [Figure 4] FIG. 4 is a plan view showing an example of the arrangement of a membrane material in a ceiling structure according to an embodiment of the present invention, where (a) is an example of the arrangement in a ceiling vibration-damping material having three bags, and (b) is another example of the arrangement in a ceiling vibration-damping material having three bags. [Diagram 5] FIG. 5 is a schematic diagram showing an example of a membrane material in a ceiling structure according to an embodiment of the present invention. [Figure 6] FIG. 6 is a schematic diagram showing an example of a method for constructing a ceiling structure according to an embodiment of the present invention. [Figure 7] FIG. 7 is a schematic diagram showing another example of the method for constructing a ceiling structure according to an embodiment of the present invention. [Figure 8] FIG. 8 is a schematic diagram showing a modified example of a ceiling structure according to an embodiment of the present invention, where (a) is a side view and (b) is a plan view. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] A ceiling structure 1 according to an embodiment will be described with reference to Fig. 1. In the following drawings, identical components or parts, or components or parts having the same functions, are given the same reference numerals or the reference numerals are omitted. In principle, the vertical and lateral positional relationships of each component of the ceiling structure 1 are the positional relationships when each component is installed in a usable state.

[0017] As shown in FIG. 1, the ceiling structure 1 includes a pair of edge girders 2 and a girder 3 disposed between the pair of edge girders 2. The pair of edge girders 2 and the girders 3 are rod-shaped members to which a ceiling board (not shown) that forms the design surface of the ceiling is attached. Although not shown, the edge girders 2 and the girders 3 are supported by girders at their upper surfaces, and are hung from a ceiling beam or the like directly by a hanging bar or a hanging bolt, or indirectly through the girders by a hanging bar or a hanging bolt. The edge girders 2 and the girders 3, the girders, and the hanging bar or the hanging bolt form the ceiling base material of the ceiling structure 1. The edge girders 2 and the girders 3 may be supported by fitting both ends of the edge girders 2 and the girders 3 in the longitudinal direction into liners (not shown) provided on the wall. In this case, the girders and the hanging bar or the hanging bolt may be omitted.

[0018] The edge siding 2 is arranged along both ends of the ceiling, i.e., along the walls of the building. The pair of edge siding 2 extends in the same direction. The siding 3 extends in the longitudinal direction of the pair of edge siding 2 and is arranged at a distance between the pair of edge siding 2. The number of siding 3 can be multiple as shown in FIG. 1, and can be any number depending on the conditions of the building on site, such as the interior dimensions. The pair of edge siding 2 and siding 3 can be arranged approximately parallel to each other. In the present invention, the pair of sidings arranged on the outermost sides along both ends of the ceiling is referred to as "edge siding" to distinguish it from the other sidings.

[0019] The installation pitch between the edge joists 2 and the joists 3 adjacent to the edge joists 2, and between adjacent joists 3, can be any interval depending on the type of ceiling board, the room dimensions, the location of the equipment in the ceiling, and other conditions of the building at the site. For example, if the ceiling board is gypsum board, the installation pitch can be 303 mm, 364 mm, or 455 mm, taking into account the longitudinal dimension of a typical gypsum board, which is 1,820 mm. The installation pitches may be the same or different.

[0020] The material of the border 2 and the joist 3 is not limited, and may be wood such as red pine, or steel such as stainless steel. The cross-sectional shape of the border 2 and the joist 3 is not limited to the substantially square rectangular shape as shown in Fig. 1(a), and may be a flattened rectangular shape in the case of wood, or an H-shaped, L-shaped, I-shaped, U-shaped, or other cross-sectional shape in the case of steel.

[0021] Next, the ceiling vibration-damping material 4 in the ceiling structure 1 according to the embodiment of the present invention will be described with reference to Fig. 2 and Fig. 3. As will be described later, a plurality of ceiling vibration-damping materials 4 are installed across a plurality of rafters 3 shown in Fig. 1.

[0022] As shown in Fig. 2, the ceiling damping material 4 has a plurality of bags 40. The plurality of bags 40 are connected in a belt shape via a plurality of bent portions 41. Since the ceiling damping material 4 has a plurality of bent portions 41, the bendability of the ceiling damping material 4 can be ensured, and therefore the workability of the ceiling damping material 4 can be improved.

[0023] The plurality of bags 40 connected in a belt-like shape via the bent portions 41 have ears 42 formed around them. The bent portions 41 and the ears 42 are formed by bonding the first sheet 4a and the second sheet 4b together with an adhesive or the like. The inside of the bag 40 is formed as a space surrounded by the first sheet 4a, the second sheet 4b, the bent portions 41, and the ears 42.

[0024] The first sheet 4a and the second sheet 4b may be made of the same material or different materials. When the first sheet 4a and the second sheet 4b are made of the same material, the first sheet 4a and the second sheet 4b may be made of a resin such as polyethylene, but this is not limited thereto. When the first sheet 4a and the second sheet 4b are made of different materials, the first sheet 4a may be made of a nonwoven fabric made of polyester, and the second sheet 4b may be made of a resin such as polyester, but this is not limited thereto. By forming the first sheet 4a as a nonwoven fabric, the breathability of the ceiling damping material 4 can be improved. When the first sheet 4a is formed as a nonwoven fabric, a material having moisture absorption and deodorization properties is enclosed in the bag body 40, and the ceiling damping material 4 is laid so that the first sheet 4a faces the upper side of the ceiling, thereby preventing environmental deterioration of the ceiling due to moisture and odor.

[0025] A sound-insulating material or a sound-absorbing material is enclosed in the internal space of each bag body 40. The material of the sound-insulating material or the sound-absorbing material can be selected from any material depending on the environment in which the ceiling vibration-damping material 4 is installed. The material of the sound-insulating material or the sound-absorbing material is not limited, but can be zeolite, perlite, charcoal, sand, natural glass foam, or a mixture of two or more of them. The shape of the sound-insulating material or the sound-absorbing material can be selected from any shape, provided that the flexibility of the bag body 40 can be ensured and the sound-insulating material does not leak from the bag body 40. For example, the shape of the sound-insulating material may be spherical, columnar, pellet-shaped, sheet-shaped, flake-shaped, granular, powder-shaped, etc. The sound-insulating material may also be formed by crushing an aggregate of the above-mentioned sound-insulating material to any size.

[0026] A suitable filling material for each bag 40 is, for example, zeolite granules. Zeolite is a non-combustible material containing porous crystalline aluminosilicate. Zeolite is a porous material and has high moisture absorption and deodorizing properties. The zeolite granules enclosed in the bag 40 have sound absorption properties in which sound is attenuated by repeatedly reflecting before passing through, and fine granules in particular have high sound absorption properties. Therefore, by adopting zeolite as a sound insulation material or sound absorption material, it is possible to improve the earthquake resistance performance of the ceiling and prevent environmental deterioration of the ceiling due to moisture and odor. In addition, since zeolite is non-combustible, safety from fire can be ensured. In addition, by making zeolite into granules, the flexibility of the bag 40 can be ensured.

[0027] 2(a) shows the ceiling damping material 4 having nine bags 40, and FIG. 2(b) shows the ceiling damping material 4 having three bags 40, but the number of bags 40 can be any number depending on the conditions of the building at the site, such as the room dimensions or the arrangement of equipment in the ceiling. Also, the number of bags 40 may be one as long as the flexibility of the bag 40 can be ensured.

[0028] As shown in Figs. 3 and 4, a plurality of membrane materials 5 are arranged on the ceiling damping material 4. The plurality of membrane materials 5 are support members for supporting the ceiling damping material 4 laid across a plurality of rafters 3 (see Fig. 1). The plurality of membrane materials 5 are arranged on the first sheet 4a and the second sheet 4b shown in Fig. 2, which are in contact with the plurality of rafters 3. If the plurality of membrane materials 5 are arranged on the ceiling damping material 4 before the construction of the ceiling damping material 4, the work of cutting or pasting temporary tape or the like on site can be omitted, so that the workability of the ceiling damping material 4 can be improved. In addition, by using the membrane material 5 as the support member, the ceiling damping material 4 can be supported regardless of whether the rafters 3 are made of wood or steel, or regardless of the cross-sectional shape of the rafters 3, so that the adaptability to the situation of the building on site can be improved. In particular, in the case of a conventional ceiling structure in which the support member and the rafters 3 are both made of metal, there was a possibility that a collision sound called metal touch would occur due to contact or friction between the support member and the rafters 3 caused by vibration or the like. However, if the support member is made of a membrane material 5, no collision sounds will be generated due to contact or friction with the furring strips 3, regardless of whether the material of the furring strips 3 is wood or steel, thereby preventing noise from coming from the ceiling.

[0029] A first membrane material 50 is disposed on the ceiling damping material 4 as the membrane material 5. The first membrane material 50 supports the end 42a of the ceiling damping material 4, which is located between the siding 2 and the siding 3 adjacent to the siding 2 (see FIG. 1). Here, the end 42a of the ceiling damping material 4 is defined as a pair of regions including the peripheral edge portions of the ear portions 42 of the ceiling damping material 4 that face in the same direction as the longitudinal direction of the bent portions 41.

[0030] By supporting the end 42a of the ceiling damping material 4 with the first membrane material 50, the end 42a of the ceiling damping material 4 can be positioned so that it does not hang down from the lower end (see FIG. 1) of the joist 2 or joist 3, thereby preventing the ceiling damping material 4 from being unevenly laid when attaching the ceiling board (not shown). Therefore, by supporting the end 42a of the ceiling damping material 4 with the first membrane material 50, it is possible to prevent a decrease in the vibration reduction performance of the ceiling structure 1.

[0031] Furthermore, by supporting the end 42a of the ceiling damping material 4 with the first membrane material 50, the end 42a of the ceiling damping material 4 can be positioned so that it does not hang down from the lower end of the rafter 2 or rafter 3 (see FIG. 1), preventing the end 42a of the ceiling damping material 4 from being pinched between the rafter 3 and the ceiling board (not shown). Therefore, by supporting the end 42a of the ceiling damping material 4 with the first membrane material 50, the workability of the ceiling structure 1 can be improved.

[0032] In the ceiling damping material 4 of FIG. 3 and FIG. 4, the first membrane material 50 is formed as a first tape 50a. The first tape 50a is a construction support tape that connects the ceiling damping material 4 and the edge 2 (see FIG. 1). The first tape 50a is arranged on the ceiling damping material 4 and is formed so as to extend to one of a pair of ends 42a of the ceiling damping material 4. The arrangement position 50a1 of the first tape 50a on the ceiling damping material 4 is determined in consideration of the interval between the edge 2 and the edge 3 adjacent to the edge 2 (see FIG. 1), and the shape of the bag body 40 of the ceiling damping material 4, etc. The first tape 50a is formed to have an effective length that can at least span the edge 2 and the edge 3 adjacent to the ceiling damping material 4, taking into consideration the arrangement position 50a1 of the first tape 50a, etc. By making the first tape 50a the effective length, the end 42a of the ceiling damping material 4 can be supported by the first tape 50a so that the end 42a of the ceiling damping material 4 does not hang downward from the lower ends of the joists 2 and 3. Therefore, by making the first tape 50a the effective length, the ceiling damping material 4 can be reliably brought into contact with the ceiling board (not shown), so that the vibration reduction performance of the ceiling damping material 4 can be maintained.

[0033] 3 and 4 show the ceiling damping material 4 with one or two first tapes 50a arranged thereon, but the number of first tapes 50a can be any number depending on the dimensions of the ceiling damping material 4 or the number of bags 40. For example, if the dimensions of the ceiling damping material 4 in the longitudinal direction of the bent portion 41 are larger than those shown in Figs. 3 and 4, the number of first tapes 50a may be three or more. Furthermore, since the first tape 50a only needs to be attached to the ceiling damping material 4 and the edging 2 (see Fig. 1), as long as the first tape 50a has adhesive at both ends in the extending direction, it does not need to have adhesive at other positions.

[0034] A second membrane material 51 can be disposed on the ceiling vibration-damping material 4 as the membrane material 5. The second membrane material 51 supports the end portion 42a of the ceiling vibration-damping material 4 located between the adjacent joists 3 shown in FIG. 1 (see FIG. 1).

[0035] By supporting the end 42a of the ceiling damping material 4 with the second membrane material 51, the end 42a of the ceiling damping material 4 can be positioned so that it does not hang down from the lower end (see FIG. 1) of the joist 2 or joist 3, thereby preventing the ceiling damping material 4 from being unevenly laid when attaching the ceiling board (not shown). Therefore, by supporting the end 42a of the ceiling damping material 4 with the second membrane material 51, it is possible to prevent a decrease in the vibration reduction performance of the ceiling structure 1.

[0036] Furthermore, by supporting the end 42a of the ceiling damping material 4 with the second membrane material 51, the end 42a of the ceiling damping material 4 can be positioned so that it does not hang down from the lower end (see FIG. 1) of the rafter 2 or the rafter 3, thereby preventing the end 42a of the ceiling damping material 4 from being pinched between the rafter 3 and the ceiling board (not shown). Supporting the end 42a of the ceiling damping material 4 with the second membrane material 51 can improve the workability of the ceiling structure 1.

[0037] In the ceiling damping material 4 of FIG. 3 and FIG. 4, the second membrane material 51 is formed as a second tape 51a. The second tape 51a is a connecting tape that connects the end 42a of the ceiling damping material 4 to the end 42a of another adjacent ceiling damping material 4 to form a joint. The second tape 51a is arranged on the ceiling damping material 4 and is formed so as to extend toward the other one of the pair of ends 42a of the ceiling damping material 4 in the opposite direction to the extension direction of the first tape 50a. The arrangement position 51a1 of the second tape 51a on the ceiling damping material 4 is determined in consideration of the interval between the adjacent joists 3 (see FIG. 1) and the shape of the bag body 40 of the ceiling damping material 4. The second tape 51a is formed to have a length that can connect the ends 42a of the adjacent ceiling damping materials 4, taking into consideration the arrangement position 51a1 of the second tape 51a, etc. By using the second tape 51a, the position of the ceiling damping material 4 can be adjusted by treating the connected multiple ceiling damping materials 4 in the same way as a single ceiling damping material 4, so that the ceiling damping material 4 can be reliably brought into contact with a ceiling board (not shown). Therefore, by using the second tape 51a, the workability of the ceiling damping material 4 can be improved, and the vibration reduction performance of the ceiling damping material 4 can be maintained.

[0038] 3 and 4 show the ceiling damping material 4 in which two second tapes 51a are arranged, but the number of second tapes 51a can be any number depending on the dimensions of the ceiling damping material 4 or the number of bags 40. For example, when the dimensions of the ceiling damping material 4 in the longitudinal direction of the bent portion 41 are larger than those in FIGS. 3 and 4, the number of first tapes 50a may be three or more, and when the dimensions are smaller than those in FIGS. 3 and 4, only one may be used. In addition, since the second tape 51a only needs to be attached to each of the adjacent ceiling damping materials 4, as long as the second tape 51a has adhesive at both ends in the extending direction, it does not need to have adhesive at other positions.

[0039] The ceiling damping material 4 can be provided with a third membrane material 52 as the membrane material 5. In the ceiling damping material 4 of FIG. 3(a) and FIG. 3(b), the third membrane material 52 is formed as a third tape 52a. The third tape 52a is a temporary fixing tape that connects the ceiling damping material 4 and the joist 3 (see FIG. 1) on which the vicinity of the center of gravity of the ceiling damping material 4 is laid. The third tape 52a is arranged on the ceiling damping material 4 and is formed so as to extend to the vicinity of the center of gravity of the ceiling damping material 4. Here, the vicinity of the center of gravity of the ceiling damping material 4 includes not only the position of the center of gravity of the ceiling damping material 4 in the alignment direction of the multiple joists 3 shown in FIG. 1, but also the position of the ceiling damping material 4 on the upper part of the joist 3 that is closest to the center of gravity position. By connecting the ceiling damping material 4 and the joist 3 on which the vicinity of the center of gravity of the ceiling damping material 4 is laid with the first tape 50a, the position close to the center of gravity of the ceiling damping material 4 is temporarily fixed to the joist 3. Therefore, the ceiling vibration-damping material 4 can be positioned while it is stably laid on the joist 3, thereby improving the ease of installation of the ceiling vibration-damping material 4.

[0040] The position 52a1 of the third tape 52a in the ceiling damping material 4 is determined in consideration of the positions of the first tape 50a and the second tape 51a, the position of the center of gravity of the ceiling damping material 4, and the shape of the bag body 40 of the ceiling damping material 4. The direction in which the third tape 52a extends may be substantially the same as the direction in which the first tape 50a extends, as shown in Fig. 3(a) and Fig. 3(b), or may be substantially the same as the direction in which the second tape 51a extends. The third tape 52a is formed to a length that allows the ceiling damping material 4 to be connected to the joist 3 (see Fig. 1) in which the vicinity of the center of gravity of the ceiling damping material 4 is laid, taking into consideration the position 52a1 of the third tape 52a, etc.

[0041] In addition, in FIG. 3(a) and FIG. 3(b), the ceiling vibration-damping material 4 in which one or two third tapes 52a are arranged is shown, but the number of the third tapes 52a can be any number depending on the dimensions of the ceiling vibration-damping material 4 or the number of the bags 40. For example, if the dimensions of the ceiling vibration-damping material 4 in the longitudinal direction of the bent portion 41 are larger than those in FIG. 3(a) and FIG. 3(b), the number of the third tapes 52a may be three or more. Also, as shown in FIG. 3(c), FIG. 3(d), FIG. 4(a), and FIG. 4(b), the third tape 52a can be omitted. Also, since the third tape 52a only needs to be attached to the ceiling vibration-damping material 4 and the joist 3, as long as it has an adhesive at both ends in the direction in which the third tape 52a extends, it does not need to have an adhesive at other positions.

[0042] The first tape 50a, the second tape 51a, and the third tape 52a may be foldable scalable tapes such as Nitofold (registered trademark) manufactured by Nitoms, Inc. Next, an example of the structure of the foldable tape 54 will be described with reference to FIG.

[0043] Although not shown, the foldable tape 54 is provided, for example, in the form of a tape roll. If the tape roll has perforations, the foldable tape 54 is obtained by cutting the tape at the perforations and peeling it off from the tape roll. Note that the foldable tape 54 is not limited to being provided as a tape roll, and may be in the form of a sticker in which multiple foldable tapes 54 are removably attached to a release paper or release film.

[0044] The foldable tape 54 is formed in a state where the base material portion 54a is folded multiple times in the direction shown by the dotted arrow in FIG. 5. The base material portion 54a is provided with a first attachment portion 54b and a second attachment portion 54c. The first attachment portion 54b and the second attachment portion 54c are respectively arranged at both ends of the base material portion 54a when the base material portion 54a is in a stretched state. The first attachment portion 54b and the second attachment portion 54c contain an adhesive. When the base material portion 54a is in a folded state, the foldable tape 54 is attached to the arrangement positions 50a1, 51a1, and 52a1 shown in FIG. 3 and FIG. 4 via the first attachment portion 54b.

[0045] When the base material portion 54a is folded, the second attachment portion 54c is maintained in a state of being peelably attached to the first portion 54a1 of the base material portion 54a. Therefore, the foldable tape 54 is suitable for placement on the ceiling damping material 4 before the installation of the ceiling damping material 4 (see Figs. 3 and 4). If the foldable tape 54 is placed on the ceiling damping material 4 before the installation of the ceiling damping material 4, the work of cutting or attaching temporary tape or the like on-site can be omitted, and therefore the workability of the ceiling damping material 4 can be improved.

[0046] The material of the base material 54a is not limited, but may be a polyester resin such as polyethylene terephthalate, or vinyl chloride.

[0047] The type of adhesive is not limited, but may be a rubber-based, acrylic-based, silicone-based, or urethane-based adhesive.

[0048] In addition, a release agent is applied to the first portion 54a1 of the base material portion 54a, which faces the second attachment portion 54c in the folded state. The type of release agent is not limited, but it can be a silicone-based, long-chain alkyl-based, fluorine-based, or molybdenum sulfide-based release agent. By applying a release agent to the first portion 54a1 of the base material portion 54a, the base material portion 54a can be maintained in a folded state when not in use, and the first attachment portion 54b can be easily peeled off from the base material portion 54a when in use, allowing the base material portion 54a to be stretched. In addition, since no adhesive remains on the first portion 54a1 to which the release agent is applied, it is possible to avoid a decrease in workability due to the ceiling vibration damping material 4 or the hands of the construction worker adhering to the first portion 54a1 of the base material portion 54a during construction work of the ceiling vibration damping material 4 (see Figures 3 and 4).

[0049] In addition, in the folded state, a temporary adhesive is applied to one or both of the second portions 54a2 of the base material portion 54a, which face each other when the base material portion 54a does not have the second attachment portion 54c. The type of temporary adhesive is not limited, but it can be a polyolefin-based or styrene-based temporary adhesive. By applying a temporary adhesive to the second portion 54a2 of the base material portion 54a, the base material portion 54a can be maintained in a folded state when not in use, and when in use, the temporarily attached second portion of the base material portion 54a can be easily peeled off and the base material portion 54a can be stretched. In addition, since the second portion 54a2 to which the temporary adhesive is applied does not have an adhesive, it is possible to prevent the hands of the construction worker from sticking to the second portion 54a2 of the base material portion 54a during the construction work of the ceiling vibration damping material 4 (see Figures 3 and 4) and the workability from being reduced.

[0050] For the above reasons, by using the foldable tape 54 as the first tape 50a, the second tape 51a, and the third tape 52a, the workability of the ceiling vibration-damping material 4 (see Figures 3 and 4) can be improved.

[0051] In Fig. 5, the number of times that the base material 54a is folded is three, but this is not limited thereto. If the number of times that the base material 54a is folded is an odd number of times, the second attachment portion 54c faces the first portion 54a1 of the base material 54a in the folded state, and therefore a release paper for the second attachment portion 54c is not required. Therefore, it is preferable that the number of times that the base material 54a is folded is an odd number of times, and if it is an odd number of times, no release paper waste is generated on-site, which can contribute to reducing waste.

[0052] Although not shown in Fig. 5, a gripping portion not coated with adhesive may be provided at the end of the base material portion 54a where the second attachment portion 54c is provided. By providing a gripping portion on the base material portion 54a, the base material portion 54a can be easily stretched without adhesive sticking to the hands when stretching the base material portion 54a manually, thereby improving the workability of the ceiling vibration damping material 4 (see Figs. 3 and 4).

[0053] Next, a construction method for the ceiling structure 1 according to the embodiment will be described with reference to Fig. 6. In Fig. 6, an example is shown in which a plurality of ceiling damping materials 4, each having nine bags 40, are installed.

[0054] As shown in Fig. 6, the ceiling damping material 4 is laid in one direction between a pair of edge joists 2, straddling a plurality of joists 3. The ceiling damping material 4 is laid so that the bent portion 41 of the ceiling damping material 4 is approximately parallel to the longitudinal direction of the joists 3.

[0055] In step (a), the ceiling damping material 4 is laid across multiple joists 3, and the vicinity of the center of gravity of the ceiling damping material 4 is connected to the joists 3 to be laid. Step (a) is realized by stretching the third tape 52a arranged on the ceiling damping material 4, and attaching the tip of the third tape 52a to the joists 3 to be laid near the center of gravity of the ceiling damping material 4. By step (a), the ceiling damping material 4 is temporarily fixed to the joists 3 to be laid near the center of gravity of the ceiling damping material 4, and the reference position of the ceiling damping material 4 can be determined.

[0056] For example, if the third tape 52a is not placed on the ceiling damping material 4, the construction worker will temporarily fix it on site. If the site is a large room or the like and multiple construction workers are laying the ceiling damping material 4, if the construction workers temporarily fix it on site, the reference position of the ceiling damping material 4 may not be determined consistently depending on the intention of the construction worker or the situation on site. In step (a), since the third tape 52a is placed on the ceiling damping material 4 before the construction of the ceiling damping material 4, the position of the joist 3 close to the reference position of the ceiling damping material 4 can be easily determined based on the placement position. Therefore, according to step (a), the tip of the third tape 52a can be easily temporarily fixed to the joist 3 where the vicinity of the center of gravity of the ceiling damping material 4 is laid, and the ceiling damping material 4 can be stably laid. It should be noted that step (a) can be omitted. Examples of cases in which step (a) can be omitted include when the installation pitch between the rafters 3 is narrower than that shown in Figure 6, or when the ceiling vibration-damping material 4 can be stably installed across four or more rafters 3.

[0057] In step (b), end 42a of ceiling damping material 4 located between joist 2 and joist 3 adjacent to joist 2 is supported on the upper surface of first tape 50a. Step (b) is realized by stretching first tape 50a arranged on ceiling damping material 4 and attaching the tip of first tape 50a to joist 2.

[0058] The first tape 50a extends from the ceiling damping material 4 in contact with the lower end of the rafter 3 adjacent to the rafter 2 and the lower end of the rafter 2, and is connected to the rafter 2. When the first tape 50a is connected to the rafter 2, the end 42a of the ceiling damping material 4 is supported by the first tape 50a between the rafter 2 and the rafter 3 adjacent to the rafter 2. The end 42a of the ceiling damping material 4 supported by the first tape 50a is positioned at the lower end of the rafter 3 adjacent to the rafter 2 and the lower end of the rafter 2. Therefore, since the end 42a of the ceiling damping material 4 can be positioned so as not to hang down from the lower end of the rafter 2 or the rafter 3, it is possible to prevent the ceiling damping material 4 from being laid unevenly when attaching the ceiling board (not shown). Therefore, by supporting the end 42a of the ceiling damping material 4 with the first membrane material 50, it is possible to prevent a decrease in the vibration reduction performance of the ceiling structure 1.

[0059] Furthermore, by supporting the end 42a of the ceiling damping material 4 with the first tape 50a, the end 42a of the ceiling damping material 4 can be positioned so that it does not hang down from the lower end of the rafter 2 or rafter 3, and therefore it is possible to prevent the end 42a of the ceiling damping material 4 from being pinched between the rafter 3 and the ceiling board (not shown). Therefore, by supporting the end 42a of the ceiling damping material 4 with the first membrane material 50, the workability of the ceiling structure 1 can be improved.

[0060] Furthermore, when a construction worker applies the tape during on-site work, the application position is likely to vary, which may cause variation in the contact between the ceiling damping material 4 and the ceiling board (not shown), which may affect the vibration reduction performance. In step (b), the first tape 50a is placed on the ceiling damping material 4 before the ceiling damping material 4 is applied, so that the position of the first tape 50a can be strictly controlled and applied at the manufacturing plant for the ceiling damping material 4. Therefore, by placing the first tape 50a on the ceiling damping material 4 before the ceiling damping material 4 is applied, stable vibration reduction performance can be achieved.

[0061] In step (b), the end 42a of the ceiling damping material 4 is supported by the first tape 50a at a position where it is not laid on the edge joist 2, but since other structures such as walls are close to the edge joist 2, large vibrations are less likely to occur near the edge joist 2 compared to the vicinity of the edge joist 3. Therefore, the end 42a of the ceiling damping material 4 may or may not be laid on the edge joist 2.

[0062] Next, in step (c), new ceiling vibration-damping materials 4 are laid on the multiple joists 3 at positions adjacent to the ceiling vibration-damping materials 4 that have already been laid.

[0063] Next, in step (d), the end 42a of the ceiling damping material 4 located between the adjacent joists 3 is supported by the second tape 51a. Step (d) is realized by stretching the second tape 51a arranged on the ceiling damping material 4 on the edge joist 2 side, and attaching the tip of the second tape 51a to the ceiling damping material 4 laid in step (c).

[0064] In step (d), adjacent ceiling damping materials 4 are connected with the second tape 51a, so that the connected multiple ceiling damping materials 4 can be treated as a single ceiling damping material 4 and the position of the ceiling damping material 4 can be adjusted. By adjusting the position of the ceiling damping material 4, the end 42a of the ceiling damping material 4 can be positioned so that it does not hang down from the lower end of the joist 2 or the joist 3. Therefore, it is possible to prevent the ceiling damping material 4 from being unevenly laid when attaching the ceiling board (not shown), and to prevent a decrease in the vibration reduction performance of the ceiling structure 1.

[0065] In step (d), the end 42a of the ceiling vibration-damping material 4 can be positioned so as not to hang down from the lower end of the rafter 3. This prevents the end 42a of the ceiling vibration-damping material 4 from being pinched between the rafter 3 and the ceiling board (not shown), improving the ease of construction of the ceiling structure 1.

[0066] Furthermore, in step (d), since the second tape 51a is placed on the ceiling vibration-damping material 4 before the installation of the ceiling vibration-damping material 4, the work of cutting or pasting the second tape 51a on-site can be omitted, thereby improving the ease of installation of the ceiling vibration-damping material 4.

[0067] Thereafter, the above-mentioned steps (c) and (d) are repeated until the ceiling damping material 4 is laid on all of the joists 3. If necessary, step (a) may be performed between steps (c) and (d) or after step (d), and the ceiling damping material 4 may be connected to the joists 3 on which the vicinity of the center of gravity of the ceiling damping material 4 is laid by the third tape 52a.

[0068] Although not shown, after the ceiling damping material 4 has been laid on all the joists 3, step (b) is finally performed again, and the first tape 50a arranged on the ceiling damping material 4 is stretched and the tip of the first tape 50a is affixed to the edge joist 2. As a result, the end 42a of the ceiling damping material 4 located between the edge joist 2 and the joist 3 adjacent to the edge joist 2 is supported on the upper surface of the first tape 50a, and the same effect as the initial step (b) is obtained.

[0069] Next, another example of the construction method of the ceiling structure 1 according to the embodiment will be described with reference to Fig. 7. Fig. 7 shows an example of laying a plurality of ceiling vibration-damping materials 4 each having three bags 40. The construction method of Fig. 7 is the same as that of Fig. 6 except that in step (a) of Fig. 7, the third tape 52a does not connect the joist 3, on which the vicinity of the center of gravity of the ceiling vibration-damping material 4 is laid, to the ceiling vibration-damping material 4, as in step (a) of Fig. 6, and therefore a description of the overlapping parts will be omitted.

[0070] In step (a), the ceiling damping material 4 is laid across the joist 3. Next, in step (b), the end 42a of the ceiling damping material 4 located between the joist 2 and the joist 3 adjacent to the joist 2 is supported on the upper surface of the first tape 50a. In step (b), the first tape 50a extends from the ceiling damping material 4 in a state of contacting the lower end of the joist 3 adjacent to the joist 2 and the lower end of the joist 2, and is connected to the joist 2. When the first tape 50a is connected to the joist 2, the end 42a of the ceiling damping material 4 is supported by the first tape 50a between the joist 2 and the joist 3 adjacent to the joist 2, and the position near the center of gravity of the ceiling damping material 4 is adjusted so as to be laid on the joist 3. Therefore, in the construction method of Figure 7, the number of bag bodies 40 is small, and when the first tape 50a is connected to the border joist 2, the position near the center of gravity of the ceiling vibration-damping material 4 is adjusted so that it is laid on the joist 3 adjacent to the border joist 2, so that the third tape 52a in Figure 6 can be omitted.

[0071] In step (c), new ceiling damping material 4 is laid on a plurality of joists 3 at a position adjacent to the already laid ceiling damping material 4. In step (d), end 42a of ceiling damping material 4 located between adjacent joists 3 is supported by second tape 51a. Thereafter, the above-mentioned steps (c) and (d) are repeated until ceiling damping material 4 is laid on all joists 3. Although not shown, after ceiling damping material 4 is laid on all joists, finally, step (b) is performed again.

[0072] According to the installation method of Figure 7, the end 42a of the ceiling vibration-damping material 4 can be positioned so that it does not hang downward from the lower end of the joist 2 or joist 3, thereby achieving the same effect as the installation method of Figure 6.

[0073] In addition, even when using a ceiling damping material 4 having a different number of bags 40 from the examples in Fig. 6 and Fig. 7, the ceiling damping material 4 can be installed using the same installation method as described above. In addition, in the above-mentioned installation method, if necessary, the ceiling damping material 4 can be cut at the bent portion 41 shown in Fig. 2 to reduce the number of bags 40, thereby adjusting the length of the ceiling damping material 4.

[0074] In addition, by repeating the above-mentioned construction method multiple times, it is possible to lay multiple ceiling vibration-damping materials 4 in the longitudinal direction of the joist 3.

[0075] 6 and 7, the first tape 50a, the second tape 51a, and the third tape 52a may be left in place on the ceiling damping material 4, or may be peeled off as necessary. The first tape 50a that is not connected to the joist 2 may be used to connect adjacent ceiling damping materials 4 together to support the function of the second tape 51a, as shown by the dashed line in step (d) of FIG.

[0076] Next, a modified example of the ceiling structure 1 according to the embodiment will be described with reference to Fig. 8. In the following description, the configuration other than the membrane material 5 is the same as the configuration of the ceiling structure 1 described above, and therefore the description will be omitted.

[0077] In the above-described embodiment, multiple membrane materials 5 are arranged on the ceiling vibration-damping material 4 before the ceiling vibration-damping material 4 is installed. However, there are cases where multiple membrane materials 5 cannot be arranged directly on the ceiling vibration-damping material 4 or where it is difficult to arrange them due to reasons such as low strength of the first sheet 4a or second sheet 4b (see FIG. 2) of the ceiling vibration-damping material 4. According to this modified example, even when multiple membrane materials 5 cannot be arranged directly on the ceiling vibration-damping material 4 or where it is difficult to arrange them, the same effect as the above-described embodiment can be obtained.

[0078] In the ceiling structure 1 of FIG. 8, the membrane material 5 includes a thin film sheet 55. The thin film sheet 55 is connected between the edge joist 2 and the edge joist 3 adjacent to the edge joist 2, and supports the end 42a of the ceiling vibration-damping material 4. The thin film sheet 55 is connected between the adjacent edge joists 3, and supports the end 42a of the ceiling vibration-damping material 4. In FIG. 8, the longitudinal width of the thin film sheet 55 is a length that covers all of the end 42a of the two ceiling vibration-damping materials 4, but is not limited thereto, and can be any width within a range that can support the end 42a of the ceiling vibration-damping material 4. The thickness of the thin film sheet 55 is not limited, but can be, for example, 15 to 75 μm. The material of the thin film sheet 55 may be any material that does not affect the vibration-damping performance, and is selected in consideration of surface strength, cold resistance, impact resistance, piercing strength, and the like. The material of the thin film sheet 55 is not limited, but may be a polyethylene resin or a composite nylon film of polyethylene terephthalate (PET), nylon 6 (polyamide 6: PA6), and polyethylene.

[0079] The thin film sheet 55 is fixed to the lower end of the edge joist 2 and the lower end of the joist 3 adjacent to the edge joist 2 using an adhesive. The thin film sheet 55 is also fixed to the lower ends of the adjacent joists 3 using an adhesive. The type of adhesive is not limited, but may be a rubber-based, acrylic-based, silicone-based, or urethane-based adhesive.

[0080] As in this modified example, by connecting the thin film sheet 55 between the edge joists 2 and the joists 3 adjacent to the edge joists 2, and between adjacent joists 3, the ends 42a of all of the ceiling damping materials 4 laid on the multiple joists 3 are supported by the thin film sheet 55. By supporting the ends 42a of the ceiling damping materials 4 with the thin film sheet 55, the ends 42a of the ceiling damping materials 4 can be positioned so that they do not hang down from the lower ends of the edge joists 2 or joists 3, and therefore it is possible to prevent the ceiling damping materials 4 from being laid unevenly when attaching the ceiling board (not shown).

[0081] In addition, since the end 42a of the ceiling vibration-damping material 4 is supported by the thin film sheet 55, the end 42a of the ceiling vibration-damping material 4 can be positioned so that it does not hang down from the lower end of the joist 2 or the joist 3, thereby preventing the end 42a of the ceiling vibration-damping material 4 from being pinched between the joist 3 and the ceiling board (not shown).

[0082] Therefore, this modification also provides the same effects as the above-described embodiment.

[0083] Next, a method for constructing the ceiling structure 1 using the thin film sheet 55 in this modified example will be described. As in the above-described embodiment, in this modified example, the ceiling vibration-damping material 4 is laid in one direction between a pair of edge joists 2, straddling a plurality of joists 3. In the following, explanations of parts that overlap with the above-described embodiment will be omitted.

[0084] First, the ceiling vibration-damping material 4 is laid across one or more joists 3, a thin film sheet 55 is connected between the edge joist 2 and the joist 3 adjacent to the edge joist 2, and the end 42a of the ceiling vibration-damping material 4 located between the edge joist 2 and the joist 3 adjacent to the edge joist 2 is supported by the thin film sheet 55.

[0085] Next, new ceiling damping materials 4 are laid on the multiple joists 3 at positions adjacent to the already laid ceiling damping materials 4, and the thin film sheet 55 is connected between the adjacent joists 3, and the ends 42a of the two ceiling damping materials 4 located between the adjacent joists 3 are supported by the thin film sheet 55. After that, the process is repeated until the ceiling damping materials 4 are laid on all the joists 3.

[0086] After the ceiling vibration-damping material 4 has been laid on all of the rafters 3, a thin film sheet 55 is finally connected between the edge rafters 2 and the rafters 3 adjacent to the edge rafters 2, and the end 42a of the ceiling vibration-damping material 4 located between the edge rafters 2 and the rafters 3 adjacent to the edge rafters 2 is supported by the thin film sheet 55.

[0087] Furthermore, by repeating the construction method of this modified example multiple times, it is also possible to lay multiple ceiling vibration-damping materials 4 in the longitudinal direction of the rafters 3.

[0088] According to the construction method of this modification, the end 42a of the ceiling damping material 4 can be positioned so as not to hang down from the lower end of the rafter 2 or rafter 3, so that the same effect as the construction method of the above-mentioned embodiment can be obtained. Also, by increasing the width of the thin film sheet 55 in the longitudinal direction of the rafter 3, multiple ceiling damping materials 4 can be laid side by side in the longitudinal direction of the rafter 3, so that construction efficiency can be greatly improved. [Explanation of symbols]

[0089] 1 ceiling structure, 2 edge frame, 3 edge frame, 4 ceiling vibration-damping material, 4a first sheet, 4b second sheet, 5 membrane material, 40 bag body, 41 bending portion, 42 ear portion, 42a end portion, 50 first membrane material, 50a first tape, 50a1 arrangement position, 51 second membrane material, 51a second tape, 51a1 arrangement position, 52 third membrane material, 52a third tape, 52a1 arrangement position, 54 foldable tape, 54a base material portion, 54a1 first portion, 54a2 second portion, 54b first attachment portion, 54c second attachment portion, 55 thin film sheet.

Claims

1. A pair of joists are arranged along both ends of the ceiling; A plurality of sills extending in a longitudinal direction of the edge sill and spaced apart between the pair of edge sills; A plurality of ceiling vibration-damping materials are laid across the plurality of rafters between the pair of rafters; A plurality of membrane materials including a first membrane material that supports an end of the ceiling vibration-damping material located between the edge siding and the siding adjacent to the edge siding, and a second membrane material that supports an end of the ceiling vibration-damping material located between adjacent sidings; Equipped Ceiling structure.

2. The plurality of membrane materials include A third membrane material that connects the ceiling vibration-damping material and the joist on which the vicinity of the center of gravity of the ceiling vibration-damping material is laid. Includes The ceiling structure according to claim 1.

3. The first membrane material, the second membrane material, and the third membrane material are foldable tapes, and the foldable tapes are disposed on the ceiling vibration damping material. The ceiling structure according to claim 2.

4. The plurality of membrane materials are thin film sheets connected between the edge siding and the siding adjacent to the edge siding, and between adjacent sidings. The ceiling structure according to claim 1.

5. A method for constructing a ceiling structure having a pair of edge strips arranged along both ends of a ceiling, a plurality of edge strips extending in the longitudinal direction of the pair of edge strips and spaced apart between the pair of edge strips, and a plurality of ceiling vibration-damping materials sequentially laid across the plurality of edge strips in one direction between the pair of edge strips, A step of supporting an end portion of the ceiling vibration-damping material located between the pair of edge sills and the edge sill adjacent to the edge sill with a first membrane material; supporting an end portion of the ceiling vibration-damping material located between adjacent ones of the rafters with a second membrane material; Includes How to construct ceiling structures.

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