Ceiling structure of building

Abstract

To guide heat in a lower floor chamber toward an upper floor chamber, and to effectively suppress transmission of sound between the upper floor chamber and the lower floor chamber.SOLUTION: A guiding chamber dividing part (a holding part side 5a3 and a lid body side 5c) is directly or indirectly attached to a floor surface material 3 so that the vibration generated in the floor surface material 3 is transmitted. A heat-guiding member 5 is provided with a fixed-end 5b1 fixed to the guiding chamber dividing part, a vibrating-end 5b2 positioned away from the fixed-end 5b1 and capable of vibrating with respect to the fixed-end in accordance with the vibration of the guiding chamber dividing part, and has a path extension 5b provided in the guiding chamber side S2 so as to extend a path connecting a through-hole 2b and the opening part 5d.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a ceiling structure for a building that guides heat from a lower floor room toward an upper floor room and effectively suppresses the transmission of sound between the upper and lower floor rooms. [Background technology]

[0002] BACKGROUND ART Conventionally, a building described in Patent Document 1, for example, is known as a configuration for ventilating a specific room and suppressing sound generated in the specific room from being transmitted to the outside of the specific room.

[0003] The building in Patent Document 1 includes a ceiling, an attic space above the ceiling, and a soundproof duct installed in the attic space. The ceiling has an air supply hole that connects the room to the attic space. The soundproof duct includes a soundproof component and a connecting pipe that connects the soundproof component to the air supply hole.

[0004] The sound-insulating component has a first open end connected to the connecting pipe and a second open end open to the ceiling space. The sound-insulating component also has a housing having the first open end and the second open end, and a partition plate provided on the housing so as to form a serpentine path that snakes along a direction from the first open end to the second open end.

[0005] Patent Document 1 also states that because the inner surface of the sound insulation path can be enlarged, more low-frequency components of the sound collide with this inner surface, improving the attenuation effect of the low-frequency components of the sound. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2008-150876 Summary of the Invention [Problem to be solved by the invention]

[0007] However, in the building described in Patent Document 1, although the serpentine path can prevent sound generated in a room under the ceiling from being transmitted into the attic space, sufficient consideration is not given to preventing sound from being transmitted from upper floor rooms located above the attic space to lower floor rooms.

[0008] The object of the present invention is to provide a ceiling structure for a building that can guide heat from within a lower floor toward an upper floor and effectively suppress the transmission of sound between the upper and lower floors. [Means for solving the problem]

[0009] In order to solve the above problems, the first invention is a ceiling structure of a building for guiding heat within a floor room toward an upper floor room and suppressing the transmission of sound between the upper floor room and a lower floor room, the ceiling structure comprising: a ceiling surface material facing the lower floor room; a floor surface material facing the upper floor room and provided above the ceiling surface material so as to form a ceiling space between the ceiling surface material and the floor surface material; an induction chamber partition section provided within the ceiling space and defining an induction chamber for guiding heat; a ceiling connection section connecting the induction chamber partition section and the ceiling surface material through a through hole that passes through the ceiling surface material in the vertical direction; and a heat induction member having an opening formed in the induction chamber partition to open the induction chamber, the induction chamber partition being attached directly or indirectly to the floor material so that vibrations generated in the floor material are transmitted, the heat induction member having a fixed end fixed to the induction chamber partition and a vibrating end located away from the fixed end and capable of vibrating relative to the fixed end in response to vibrations of the induction chamber partition, and at least one path extension provided in the induction chamber to extend the path connecting the through hole and the opening.

[0010] According to the first aspect of the present invention, heat in the lower floor room can be guided to the ceiling space through the heat guide member. Therefore, heat in the lower floor room can be guided to the upper floor room by thermal conduction in the floor material or by forming a passage in the floor material for passing heat.

[0011] Here, the heat induction member for inducing heat as described above has a path extension portion formed to extend the path connecting the through hole and the opening, thereby preventing sound generated in the lower floor from being transmitted to the attic space and the upper floor through the through hole and the opening.

[0012] Furthermore, the induction chamber partition is attached directly or indirectly to the floor material so that vibrations generated in the floor material are transmitted, and the above-mentioned path extension has a vibrating end that is allowed to vibrate relative to the induction chamber partition in response to vibrations of the induction chamber partition. As a result, the vibrating end vibrates in the opposite direction to vibrations (e.g., heavy floor impact noise) generated in the upper floor and transmitted to the induction chamber partition, thereby suppressing the transmission of vibrations in the upper floor to the lower floor.

[0013] In this way, in the first invention, the path extension section that suppresses the transmission of sound generated in the lower floor to the upper floor can also be used as a dynamic damper to reduce vibrations generated in the upper floor, thereby effectively suppressing not only the transmission of sound from the lower floor to the upper floor, but also the transmission of sound from the upper floor to the lower floor.

[0014] In the first invention, the path extension portion may have an elastic member and a sound-absorbing member fixed to the elastic member so as to cover the outer surface of the elastic member and having higher sound-absorbing performance than the elastic member (second invention).

[0015] According to the second aspect of the present invention, the elastic member is covered with a sound-absorbing member, which more effectively prevents sound generated in the lower floor room and guided into the induction chamber from being guided into the attic space through the opening.

[0016] In the first or second invention, the ceiling structure of the building may further include a support member that supports the floor material, and the induction chamber partition may be attached to the support member (third invention).

[0017] As an example of a configuration in which the induction chamber partition is indirectly attached to the floor material so that vibrations generated in the floor material are transmitted, a configuration in which the induction chamber partition is attached only to the ceiling surface material is conceivable. In this case, vibrations generated in the floor material are transmitted to the induction chamber partition through the support members that support the floor material, the connecting members that connect the support members to the ceiling surface material, and the ceiling surface material. However, in this configuration, because the ceiling surface material is used as a vibration transmission medium, it is difficult to increase the efficiency of suppressing the transmission of sound generated in the upper floor to the lower floor.

[0018] In contrast, according to the third invention, vibrations generated in the floor material are transmitted from the support member without passing through the ceiling material, thereby efficiently suppressing the transmission of sound from the upper floor to the lower floor.

[0019] The ceiling structure of any one of the first to third inventions of the building may further include an inserted member provided in the lower floor room and having an inserted portion that is inserted into the induction chamber through the through hole in response to vertical vibrations of the induction chamber partition, and a closing means provided in the induction chamber that forms an induction path for guiding heat between the path extension and is pressed by the inserted portion inserted into the induction chamber and comes into contact with the path extension when vibrations having an amplitude greater than or equal to a predetermined amplitude occur in the induction chamber partition, thereby closing the induction path (fourth invention).

[0020] According to the fourth invention, when vibrations having an amplitude greater than a predetermined amplitude are not occurring in the induction chamber partition, an induction path is maintained between the closing means and the path extension, so that, as described above, heat in the lower floor can be directed toward the upper floor and sound transmission between the upper and lower floors can be effectively suppressed.

[0021] On the other hand, when vibrations having an amplitude equal to or greater than a predetermined amplitude occur in the induction chamber partition, the induction path is closed by the closing means pressed by the inserted part inserted into the induction chamber. This makes it possible to prevent sound generated in the upper room from being guided to the lower room along the opening of the heat induction member and the induction path.

[0022] The ceiling structure of a building of the fourth invention may include two path extension portions, and the closing means may have one of the two path extension portions, and may close the guide path by pressing the inserted portion to bring the one path extension portion into contact with the other path extension portion (fifth invention).

[0023] According to the fifth invention, in a situation where vibrations having an amplitude greater than a predetermined amplitude are not occurring in the induction chamber partition, the two path extension sections can function as dynamic dampers, thereby more effectively suppressing the transmission of sound between the upper and lower floors.

[0024] On the other hand, when vibrations having an amplitude equal to or greater than a predetermined amplitude occur in the induction chamber section, one of the two path extensions can be used as a closing means.

[0025] The ceiling structure of the building of the fifth invention may further include a third path extension portion located away from the one path extension portion and the other path extension portion so that vibration of the vibrating end is allowed when vibration having an amplitude equal to or greater than the predetermined amplitude occurs in the induction chamber partition portion (sixth invention).

[0026] According to the sixth aspect of the present invention, even when one path extension portion and the other path extension portion are in contact with each other so as to close the guide path, i.e., when the vibration of the vibrating ends of these path extension portions is restricted, the vibration of the vibrating end of the third path extension portion is permitted, and therefore the function as a dynamic damper can be maintained even when the guide path is closed.

[0027] In the fourth invention, the closing means may have a displacement member attached to the induction chamber partition portion so as to be displaceable relative to the induction chamber partition portion so as to come into contact with the path extension portion in response to pressure from the inserted portion (seventh invention).

[0028] According to the seventh aspect of the present invention, when vibrations having an amplitude equal to or greater than a predetermined amplitude occur in the induction chamber dividing portion, the displacement member can be displaced to close the induction path. [Effects of the Invention]

[0029] According to the present invention, heat in the lower floor room can be guided toward the upper floor room, and sound transmission between the upper floor room and the lower floor room can be effectively suppressed. [Brief explanation of the drawings]

[0030] [Figure 1] 1 is a side cross-sectional view showing a ceiling structure of a building according to a first embodiment of the present invention. [Figure 2] 2 is a perspective view showing the ceiling structure of FIG. 1 in a partially exploded state with a portion thereof omitted. [Figure 3] 3 is a perspective view showing a part of the ceiling structure of FIG. 2 with the ceiling surface material and the cover omitted. [Figure 4] FIG. 6 is a side cross-sectional view showing a ceiling structure for a building according to a second embodiment of the present invention. [Figure 5] FIG. 5 is a view equivalent to FIG. 3 of the ceiling structure shown in FIG. 4. [Figure 6] FIG. 10 is a side cross-sectional view showing a ceiling structure for a building according to a third embodiment of the present invention. [Figure 7] FIG. 10 is a side cross-sectional view showing a ceiling structure for a building according to a fourth embodiment of the present invention. [Figure 8] FIG. 10 is a side cross-sectional view showing a ceiling structure for a building according to a fifth embodiment of the present invention. [Figure 9] FIG. 9 is a side cross-sectional view showing a state in which the guide path is closed in the ceiling structure of FIG. 8. [Figure 10] FIG. 10 is a side cross-sectional view showing a ceiling structure for a building according to a sixth embodiment of the present invention. [Figure 11] 11 is a side cross-sectional view showing a state in which the guide path is closed in the ceiling structure of FIG. 10. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0031] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The following describes embodiments of the present invention with reference to the accompanying drawings. Note that the following embodiments are examples that embody the present invention and are not intended to limit the technical scope of the present invention.

[0032] Fig. 1 is a side cross-sectional view showing a ceiling structure for a building according to a first embodiment of the present invention. Fig. 2 is a perspective view showing a part of the ceiling structure of Fig. 1, with a portion omitted and a portion exploded. Fig. 3 is a perspective view showing a part of the ceiling structure of Fig. 2, with a ceiling surface material and a cover omitted.

[0033] Referring to Figures 1 to 3, the ceiling structure 1 of a building in the first embodiment of the present invention is designed to guide heat in the lower floor DF toward the upper floor UF and to suppress the transmission of sound between the upper floor UF and the lower floor DF.

[0034] Specifically, the ceiling structure 1 comprises a plurality of ceiling surface materials 2 facing the lower floor DF, floor surface materials 3 facing the upper floor UF and provided above the ceiling surface materials 2 so as to form an attic space S1 between them, support members 4 supporting the floor material 3, and heat guide members 5 for directing heat in the lower floor DF into the attic space S1. Heat generated in the lower floor DF is guided to the attic space S1 by the heat guide members 5, and is then guided to the upper floor UF by thermal conduction through the floor material 3 or through vents 3a formed in the floor material 3. Note that if heat generated in the lower floor DF is guided to the upper floor UF by thermal conduction through the floor material 3, the vents 3a in the floor material 3 can be omitted.

[0035] The support member 4 has a pair of flanges 4a and a web 4b connecting the middle portions of the flanges 4a. The pair of flanges 4a are arranged vertically opposite each other and horizontally. The web 4b is arranged vertically and extends horizontally.

[0036] The floor surface material 3 is placed on the upper surface of the support member 4 (the upper surface of the flange 4a arranged thereon).

[0037] The ceiling panels 2 are suspended from the support member 4 via a suspension member (see suspension member 6 in FIGS. 6 and 7 ), not shown. Specifically, the ceiling panels 2 are suspended from the support member 4 by the suspension member 6, with their end faces horizontally butted together. As shown in FIG. 2 , mating grooves 2a are formed on opposing end faces of the ceiling panels 2 to mate with ceiling connectors 5a2 of the heat guide members 5, which will be described later. The mating grooves 2a are grooves that open toward the adjacent ceiling panel 2 and penetrate the ceiling panel 2 in the vertical direction. Specifically, the mating grooves 2a have a bottom surface 2a1 facing the adjacent ceiling panel 2 and a pair of opposing side surfaces 2a2 (one side surface 2a2 is shown in FIG. 2 ) that extend from both ends of the bottom surface 2a1 toward the adjacent ceiling panel 2. In this way, the ceiling panel 2 has through-holes 2b that penetrate the ceiling panel 2 in the vertical direction via the mating grooves 2a. In this embodiment, one through hole 2b is formed by two adjacent ceiling surface materials 2, but one through hole may be provided in one ceiling surface material 2, or one through hole may be provided by three or more ceiling surface materials 2. In the following explanation, the direction in which the two ceiling surface materials 2 are adjacent in Fig. 2 is defined as the left-right direction, and the direction in which the pair of side surfaces 2a2 face each other is defined as the front-rear direction.

[0038] 1 to 3, the heat guide member 5 has a pair of guide member bodies 5a facing each other in the left-right direction, a plurality of path extensions 5b protruding from one guide member body 5a toward the other guide member body 5a, and a pair of cover bodies 5c (only the front cover body 5c is shown in FIG. 2) attached to the front and rear end faces of the pair of guide member bodies 5a, respectively.

[0039] Since the pair of guide member bodies 5a each have a similar configuration (a symmetrical configuration), only the configuration of one of the guide member bodies 5a will be described, and the description of the other guide member body 5a will be omitted, except when explaining the relationship between the two guide member bodies 5a.

[0040] The guide member main body 5a has an attachment portion 5a1 attached to the lower flange 4a of the support member 4, a ceiling connection portion 5a2 connected to the ceiling surface material 2, and a holding portion 5a3 that holds multiple path extension portions 5b between the attachment portion 5a1 and the ceiling connection portion 5a2.

[0041] The mounting portion 5a1 has a receiving groove 5a1a that opens toward the left or right and extends in the front-rear direction to receive the end of the flange 4a of the support member 4. Specifically, the mounting portion 5a1 has a lower portion 5a1b that is positioned below the flange 4a, an upper portion 5a1c that is positioned above the flange 4a, and a determining portion 5a1d that connects the lower portion 5a1b and the upper portion 5a1c and determines the receiving depth of the flange 4a. The receiving groove 5a1a is defined by the lower portion 5a1b, the upper portion 5a1c, and the determining portion 5a1d. The upper portion 5a1c has multiple threaded holes 5a1c1 that penetrate the upper portion 5a1c in the vertical direction. Bolts B1 are threaded into the threaded holes 5a1c1 from above, thereby clamping the flange 4a between the lower surface of the bolt B1 and the lower portion 5a1b. As a result, the attached portion 5a1 is indirectly attached to the floor surface material 3 via the support member 4 so that vibrations generated in the floor surface material 3 are transmitted.

[0042] The ceiling connection portion 5a2 connects the guide member main body 5a to the ceiling surface material 2 so as to guide heat from the lower floor room DF to the guide chamber S2 (described below) while restricting the transfer of heat from the lower floor room DF to the ceiling space S1 through the through-hole 2b in the ceiling surface material 2. The ceiling connection portion 5a2 has a fitting groove 5a2a that opens in either the left-right direction and extends in the front-to-back direction to fit the end of the fitting groove 2a formed in the ceiling surface material 2. Specifically, the ceiling connection portion 5a2 has an upper arrangement portion 5a2b that is positioned above the ceiling surface material 2, a lower arrangement portion 5a2c that is positioned below the ceiling surface material 2, and a determination portion 5a2d that connects the upper arrangement portion 5a2b and the lower arrangement portion 5a2c and determines the fitting depth. The fitting groove 5a2a is defined by the upper arrangement portion 5a2b, the lower arrangement portion 5a2c, and the determination portion 5a2d. The ceiling surface material 2 is fitted into the fitting groove 5a2a until the bottom surface 2a1 of the fitting groove 2a of the ceiling surface material 2 abuts against the defining portion 5a2d. As a result, the front-to-rear opening of the gap S3 formed between the two adjacent defining portions 5a2d (see FIGS. 2 and 3) is closed by the side surfaces 2a2 of the two adjacent ceiling surface materials 2. This restricts the transfer of heat from the lower floor DF to the attic space S1 through the through-hole 2b of the ceiling surface material 2.

[0043] The holding portions 5a3 of both induction member bodies 5a and the pair of lid bodies 5c define an induction chamber S2 between them. That is, the pair of holding portions 5a3 and the pair of lid bodies 5c are provided in the ceiling space S1 and constitute an induction chamber partition that defines the induction chamber S2 for guiding heat. Specifically, the pair of holding portions 5a3 face each other in the left-right direction and extend in the front-to-rear direction. One of the pair of lid bodies 5c is fixed to the front end surfaces of the pair of holding portions 5a3 while straddling the front end surfaces of the pair of holding portions 5a3. The other of the pair of lid bodies 5c is fixed to the rear end surfaces of the pair of holding portions 5a3 while straddling the rear end surfaces of the pair of holding portions 5a3. This causes the front and rear openings in the space between the pair of induction member bodies 5a to be closed by the pair of lid bodies 5c, thereby defining the induction chamber S2 between the pair of induction member bodies 5a and the pair of lid bodies 5c. In this embodiment, the pair of lid bodies 5c are provided not only on the holding portion 5a3 but also on an area including the lower portion 5a1b of the mounting portion 5a1 and the upper portion 5a2b of the ceiling connection portion 5a2. Although the guide member main body 5a and the lid body 5c are separate members in the above description, the guide member main body 5a and the lid body 5c may be integrally configured. For example, each guide member main body 5a may have a segment of the lid body 5c separated by a separation line D1 indicated by a two-dot chain line in FIG. 2. In this case, the guide chamber S2 can be defined by arranging the pair of guide member main bodies 5a opposite each other and butting the tips of the segments of the lid body 5c together.

[0044] Furthermore, the heat guide member 5, which is composed of a pair of holding members 5a3 and a pair of lids 5c, has an opening 5d formed therein to open the induction chamber S2 into the ceiling space S1. Specifically, the opening 5d opens the induction chamber S2 upward between the pair of holding members 5a3 and the pair of lids 5c. Therefore, heat generated in the lower floor room DF is guided from the lower floor room DF into the induction chamber S2 through the through-hole 2b in the ceiling surface material 2, and then into the ceiling space S1 through the opening 5d and the passage hole 4a1 formed in the flange 4a of the support member 4. While the opening 5d is described as opening upward, an opening penetrating the holding member 5a3 in the left-right direction may also be formed. Furthermore, while the example of forming the passage hole 4a1 in the flange 4a has been described, the formation of the passage hole 4a1 is not essential; it is sufficient to form a ventilation gap between the flange 4a and the mounting portion 5a1. This allows for effective use of the induction path P1, which will be described later.

[0045] The multiple path extensions 5b are provided in the guide chamber S2 so as to extend the path connecting the through hole 2b and the opening 5d. That is, the multiple path extensions 5b are arranged so as to intersect with the shortest path connecting the through hole 2b and the opening 5d (a straight line extending in the vertical direction in this embodiment). Specifically, the multiple path extensions 5b are arranged vertically and extend in the front-to-rear direction, extending from one holding portion 5a3 to the other holding portion 5a3. The multiple path extensions 5b in the other holding portion 5a3 are arranged vertically and extend in the front-to-rear direction, extending from the other holding portion 5a3 to the one holding portion 5a3, so as to be positioned between the path extensions 5b adjacent to each other in the vertical direction. Due to this arrangement of the path extensions 5b, a guide path P1 having multiple turning points in the left-to-right direction is formed between the through hole 2b and the opening 5d.

[0046] Each path extension 5b also functions as a dynamic damper. Specifically, each path extension 5b includes a fixed end 5b1 fixed to the holding portion 5a3 (induction chamber partition), a vibrating end 5b2 positioned away from the fixed end 5b1, and an elastic intervening portion 5b3 interposed between the fixed end 5b1 and the vibrating end 5b2 and having elasticity that allows the vibrating end 5b2 to vibrate in response to the vibration of the holding portion 5a3. As a result, when the holding portion 5a3 vibrates due to vibrations transmitted via the support member 4 caused by sound (e.g., heavy floor impact sound) generated in the upper floor room UF, the vibrating end 5b2 vibrates in the opposite direction to the vibration, thereby reducing the vibrations generated in the upper floor room UF.

[0047] The specific configuration of each path extension portion 5b will be described below.

[0048] Each of the path extension portions 5b includes an elastic member 5b4 having a fixed end 5b1 and an elastic intervening portion 5b3, and a sound absorbing member 5b5 fixed to the elastic member 5b4 so as to cover the outer surface of the elastic member 5b4.

[0049] The elastic member 5b4 is a plate-shaped member that extends from one holding portion 5a3 toward the other holding portion 5a3 and in the front-rear direction. The elastic member 5b4 is formed of a viscoelastic material such as rubber to function as a dynamic damper as described above. While the configuration in which the elastic member 5b4 is fixed to the holding portion 5a3, i.e., the elastic member 5b4 has the fixed end 5b1, it is sufficient for the elastic member 5b4 to have at least the elastic interposition portion 5b3. Specifically, the elastic member 5b4 may be connected to the holding portion 5a3 via another member, in which case the other member has the fixed end.

[0050] The sound-absorbing member 5b5 is made of a material with higher sound-absorbing performance than the elastic member 5b4, such as a porous sound-absorbing material such as urethane foam. The sound-absorbing member 5b5 includes an upper covering portion 5b5a that covers the upper surface of the elastic member 5b4, a lower covering portion 5b5b that covers the lower surface of the elastic member 5b4, and end covering portions 5b5c that cover the left and right end surfaces of the elastic member 5b4. When the elastic member 5b4 is covered with the upper covering portion 5b5a, the lower covering portion 5b5b, and the end covering portion 5b5c, the path extension portion 5b has a cross-sectional shape of an isosceles triangle. In this embodiment, the sound-absorbing member 5b5 in the path extension portion 5b located at the top right includes only the lower covering portion 5b5b. The sound-absorbing member 5b5 in the path extension portion 5b located at the top left includes only the lower covering portion 5b5b and the end covering portion 5b5c. In the path extension portion 5b having the end surface covering portion 5b5c, the end surface covering portion 5b5c has the vibrating end, whereas in the path extension portion 5b not having the end surface covering portion 5b5c, the elastic member 5b4 has the vibrating end.

[0051] As described above, according to the first embodiment, heat in the lower room DF can be guided to the attic space S1 through the heat guide member 5. Therefore, heat in the lower room DF can be guided toward the upper room UF by heat conduction in the floor material 3 or by forming a passage in the floor material 3 for passing heat.

[0052] Here, the heat induction member 5 for inducing heat as described above has a path extension portion 5b formed to extend the path connecting the through hole 2b and the opening 5d, thereby preventing sound generated in the lower floor DF from being transmitted to the attic space S1 and the upper floor UF through the through hole 2b and the opening 5d.

[0053] Furthermore, the induction chamber partition (holding portion 5a3 and lid body 5c) is attached directly or indirectly to the floor material 3 so that vibrations generated in the floor material 3 are transmitted, and the above-mentioned path extension portion 5b has a vibrating end 5b2 that is allowed to vibrate relative to the induction chamber partition in response to vibrations of the induction chamber partition. As a result, the vibrating end 5b2 vibrates in the opposite direction to vibrations (e.g., heavy floor impact noise) generated in the upper floor room UF and transmitted to the induction chamber partition, thereby suppressing the transmission of vibrations in the upper floor room UF to the lower floor room DF.

[0054] In this way, in the first embodiment, the path extension 5b, which is used to suppress the transmission of sound generated in the lower floor DF to the upper floor UF, can also be used as a dynamic damper to reduce vibrations generated in the upper floor UF. This effectively suppresses not only the transmission of sound from the lower floor DF to the upper floor UF, but also the transmission of sound from the upper floor UF to the lower floor DF.

[0055] In the first embodiment, the elastic member 5b4 having the elastic interposition portion 5b3 is covered with the sound-absorbing member 5b5, which more effectively prevents the sound generated in the lower room DF and guided into the induction chamber from being guided into the attic space S1 through the opening 5d.

[0056] As a configuration in which the induction chamber partition (holding portion 5a3 and lid body 5c) is indirectly attached to the floor surface material 3 so that vibrations generated in the floor surface material 3 are transmitted, for example, a configuration in which the induction chamber partition is attached only to the ceiling surface material 2, as shown in Figure 7, is conceivable. In this case, vibrations generated in the floor surface material 3 are transmitted to the induction chamber partition through the support member 4A that supports the floor surface material 3, the connecting member (hanging member 6) that connects the support member 4A to the ceiling surface material 2, and the ceiling surface material 2. However, in this configuration, because the ceiling surface material 2 is included as a vibration transmission medium, it is difficult to increase the efficiency of suppressing the transmission of sound generated in the upper floor room UF to the lower floor room DF.

[0057] In contrast, according to the first embodiment, vibrations generated in the floor surface material 3 are transmitted from the support member 4 without passing through the ceiling surface material 2, thereby efficiently suppressing the transmission of sound from the upper floor room UF to the lower floor room DF.

[0058] Fig. 4 is a side cross-sectional view showing a ceiling structure for a building according to a second embodiment of the present invention, and Fig. 5 is a view equivalent to Fig. 3 of the ceiling structure shown in Fig. 4.

[0059] A ceiling structure 1A according to the second embodiment will be described below with reference to Figures 4 and 5. Note that the same components as those in the ceiling structure 1 of the first embodiment are given the same reference numerals, and descriptions thereof will be omitted.

[0060] The ceiling structure 1A has a support member 4A having a rectangular cross section, unlike the support member 4 of the first embodiment which has a flange 4a and a web 4b. The support member 4A is used as a beam in a wooden building, for example.

[0061] Furthermore, the ceiling structure 1A has a plurality of mounting portions 5Aa1 attached to the support member 4A instead of the mounting portion 5a1 of the first embodiment. The mounting portions 5Aa1 are attached to the left and right side surfaces of the support member 4A with the lower end of the support member 4A inserted between the retaining portions 5a3 (in the openings 5d). Specifically, each mounting portion 5Aa1 has a bolt 5Aa1a extending upward from the upper end surface of the retaining portion 5a3, a fastener 5Aa1b fixed to the side surface of the support member 4A, and a pair of nuts 5Aa1c threaded onto the bolt 5Aa1a. The fastener 5Aa1b has a fixed portion (reference numeral omitted) disposed along the side surface of the support member 4A and fixed to the side surface of the support member 4A, and an orthogonal portion (reference numeral omitted) extending in a direction perpendicular to the fixed portion (left and right direction). The bolt 5Aa1a extends upward from below the orthogonal portion through a through-hole that vertically penetrates the orthogonal portion. Then, with one nut 5Aa1c positioned below the orthogonal portion and the other nut 5Aa1c positioned above the orthogonal portion, the orthogonal portion is clamped by both nuts 5Aa1c, thereby attaching the attached portion 5Aa1 to the support member 4A.

[0062] FIG. 6 is a side cross-sectional view showing a ceiling structure for a building according to a third embodiment of the present invention.

[0063] A ceiling structure 1B according to the third embodiment will be described below with reference to Fig. 6. Note that the same components as those in the above-described embodiment are given the same reference numerals, and the description thereof will be omitted.

[0064] Unlike the above-described embodiments, the ceiling structure 1B has the heat guide member 5 attached directly to the floor material 3, rather than indirectly to the floor material 3 via the support members 4 and 4A. Also, unlike the above-described embodiments, the ceiling structure 1B has been described with the opening 5d that opens the induction chamber S2 within the attic space S1, but is not limited to opening within the induction chamber S2. As shown in the ceiling structure 1B, the opening 5d only needs to open the induction chamber S2 to an area in the attic space facing the floor material 3 in order to guide heat from within the lower floor room toward the upper floor room UF.

[0065] Specifically, ceiling structure 1B has a mounting portion 5Ba1 attached to floor material 3 instead of mounting portions 5a1 and 5Aa1. Mounting portion 5Ba1 extends from the upper end of holding portion 5a3 perpendicular to holding portion 5a3 along the underside of floor material 3 and in a direction away from the other mounting portion 5Ba1. Mounting portion 5Ba1 is attached to the underside of floor material 3 with screws B2 driven from below. This allows heat induction member 5 to be attached to floor material 3 in a state where opening 5d defined by a pair of holding portions 5a3 and a pair of lids 5c (not shown) opens induction chamber S2 to the area of ceiling space S1 facing floor material 3.

[0066] In the third embodiment, the ceiling surface material 2 is suspended from a support member 4A by a suspension member 6. The suspension member 6 includes a suspension bolt 6a attached to the side of the support member 4A, a plurality of siding supports 6b (one shown in FIG. 6) attached to the lower ends of the suspension bolts 6a, and a plurality of siding supports 6c (one shown in FIG. 6) attached to the underside of the siding supports 6b. The plurality of siding supports 6b are spaced apart in the left-right direction and extend in the front-to-back direction. The plurality of siding supports 6c are spaced apart in the front-to-back direction and extend in a direction perpendicular to the siding supports 6b (left-to-right direction). The ceiling surface material 2 is fixed to the underside of the siding supports 6c with screws or the like.

[0067] FIG. 7 is a side cross-sectional view showing a ceiling structure for a building according to a fourth embodiment of the present invention.

[0068] A ceiling structure 1C for a building according to the fourth embodiment will be described below with reference to Fig. 7. Note that the same components as those in the above embodiment will be given the same reference numerals, and the description thereof will be omitted.

[0069] Unlike the previous embodiment, the ceiling structure 1C includes a heat induction member 5C indirectly attached to the floor surface material via support members 4A, hanging members 6, and a ceiling surface material 2. The heat induction member 5C includes an extension portion 5a4 extending from the upper end of one holding portion 5a3 toward the other holding portion 5a3. The extension portion 5a4 constitutes a part of the induction chamber partition that partitions the induction chamber S2. An opening 5Cd is formed between adjacent extension portions 5a4, opening the induction chamber S2 to the attic space S1.

[0070] Fig. 8 is a side cross-sectional view showing a ceiling structure for a building according to a fifth embodiment of the present invention. Fig. 9 is a side cross-sectional view showing a state in which the guide path is closed in the ceiling structure of Fig. 8.

[0071] A ceiling structure 1D for a building according to the fifth embodiment will be described below with reference to Figures 8 and 9. Note that the same components as those in the above-described embodiments are given the same reference numerals, and description thereof will be omitted.

[0072] In addition to the above-described embodiment, the ceiling structure 1D further includes a floor material 7 for the lower floor DF, a plurality of studs (an example of an inserted member) 8 erected on the floor material 7, runners 9 for positioning the upper ends of the studs 8, and inner wall surface materials 10 provided on both side surfaces of the studs 8.

[0073] The multiple studs 8 are fixed to the floor material 7 while being spaced apart in the front-to-rear direction along the area where the through holes 2b are formed. Specifically, each stud 8 has a stud main body 8a extending from the floor material 7 to a position below the ceiling surface material 2, and an inserted portion 8b extending upward from the upper end surface of the stud main body 8a. The upper end of the inserted portion 8b is located within the through hole 2b.

[0074] The runner 9 extends in the front-to-rear direction and positions the upper end of the stud main body 8a in the left-to-right direction. Specifically, the runner 9 has a base 9a that faces the upper end surface of the stud main body 8a and a pair of side portions 9b that extend downward from the left and right ends of the base 9a. The base 9a is fixed to the ceiling surface material 2 and the guide member main body 5a (ceiling connection portion 5a2) with screws B3. The base 9a also has multiple insertion holes 9a1 (only one is shown in Figures 8 and 9) aligned in the front-to-rear direction, through which the inserted portions 8b of the studs 8 are inserted. The pair of side portions 9b are spaced apart in the left-to-right direction to receive the upper end of the stud main body 8a. Note that while a configuration including the runner 9 has been illustrated, the runner 9 can be omitted provided that multiple studs 8 are fixed to the floor material 7. Even in this case, the operation described below can be achieved.

[0075] Each interior wall surface material 10 is arranged along one of the left and right side surfaces of the stud body 8a and fixed to the stud body 8a with screws B4. When the interior wall surface material 10 is fixed to the stud body 8a, a gap S4 is formed between the interior wall surface material 10 and the stud body 8a, which allows the side portion 9b of the runner 9 to move up and down.

[0076] In this way, the stud 8 is provided in the lower floor room DF, and has an inserted portion 8b that is inserted into the induction chamber S2 through the through hole 2b in response to the vertical vibration of the induction chamber partitioning portion (the holding portion 5a3 and the lid body 5c). More specifically, in the first embodiment, the ceiling surface material 2, the heat induction member 5, and the runner 9 are assembled to the floor material 7, the stud 8, and the interior wall surface material 10 so as to be displaceable relative to the floor material 7, the stud 8, and the interior wall surface material 10 in the vertical direction in response to the vibration generated in the upper floor room UF. The stud 8 is provided in the lower floor room DF so as to be displaceable relative to the induction chamber partitioning portion in response to the vertical vibration of the induction chamber partitioning portion (the holding portion 5a3 and the lid body 5c), and has an inserted portion 8b that is inserted into the induction chamber S2 through the through hole 2b due to the relative displacement, as shown in FIG.

[0077] Furthermore, the ceiling structure 1D further includes a closing means 11 that forms an induction path P1 for guiding heat between the path extension portion 5b and the induction chamber S2, and that closes the induction path P1 when the inserted portion 8b inserted into the induction chamber S2 comes into contact with the path extension portion 5b when vibrations having an amplitude equal to or greater than a predetermined amplitude occur in the induction chamber partition. The closing means 11 is provided within the induction chamber S2.

[0078] Specifically, the closing means 11 is configured by the path extension portion 5b arranged at the bottom left in Figures 8 and 9. The closing means 11 contacts another path extension portion 5b (arranged at the bottom right) by elastic deformation of the elastic member 5b4 (elastic intervening portion) due to pressure from the inserted portion 8b, thereby closing the guide path P1.

[0079] Furthermore, the ceiling structure 1D is provided with a path extension 5b located at the bottom left and a plurality of path extensions 5b (third path extensions) located away from the path extension 5b located at the bottom right so that movement of the vibrating end 5b2 is permitted when vibrations having an amplitude equal to or greater than a predetermined amplitude occur in the induction chamber partition (holding portion 5a3 and lid body 5c). Note that the plurality of path extensions 5b corresponding to the third path extension are located above the path extension 5b located at the bottom left and the path extension 5b located at the bottom right, but the location of the third path extension is not limited to this.

[0080] The path extension portion 5b constituting the closing means 11 has a flat lower surface along the upper end surface of the inserted portion 8b to ensure a large contact area with the inserted portion 8b. Furthermore, the path extension portion 5b constituting the closing means 11 does not include the lower covering portion 5b5b to effectively elastically deform the elastic member 5b4 by the pressure of the inserted portion 8b.

[0081] According to the fifth embodiment, when vibrations having an amplitude greater than or equal to a predetermined amplitude are not generated in the induction chamber partition (holding portion 5a3 and lid body 5c), the induction path P1 is maintained between the closing means 11 and the path extension portion 5b, so that, as described above, heat in the lower floor room DF can be guided toward the upper floor room UF and sound transmission between the upper floor room UF and the lower floor room DF can be effectively suppressed.

[0082] On the other hand, when vibrations having an amplitude equal to or greater than a predetermined amplitude occur in the induction chamber partition (holding portion 5a3 and lid body 5c), the induction path P1 is closed by the closing means 11 pressed by the inserted portion 8b inserted into the induction chamber S2. As a result, when sound is generated in the upper floor room UF, it is possible to prevent the sound from being guided to the lower floor room DF along the opening 5d of the heat induction member 5 and the induction path P1.

[0083] Furthermore, according to the fifth embodiment, in a situation where vibrations having an amplitude greater than or equal to a predetermined amplitude are not occurring in the induction chamber partition (holding portion 5a3 and lid body 5c), the two path extension portions 5b can function as dynamic dampers, thereby more effectively suppressing the transmission of sound between the upper floor room UF and the lower floor room DF.

[0084] On the other hand, when vibrations having an amplitude equal to or greater than a predetermined amplitude occur in the induction chamber partition, one of the two path extensions 5b can be used as the closing means 11.

[0085] Furthermore, according to the fifth embodiment, even when one path extension portion 5b and the other path extension portion 5b are in contact with each other so as to close the guide path P1, that is, when the vibration of the vibrating ends 5b2 of these path extension portions 5b is restricted, the vibration of the vibrating end 5b2 of the other path extension portion 5b is permitted. Therefore, even when the guide path P1 is closed, the function as a dynamic damper can be maintained.

[0086] Fig. 10 is a side cross-sectional view showing a ceiling structure for a building according to a sixth embodiment of the present invention. Fig. 11 is a side cross-sectional view showing a state in which the guide path is closed in the ceiling structure of Fig. 10.

[0087] A ceiling structure 1E for a building according to the sixth embodiment will be described below with reference to Figures 10 and 11. Note that the same components as those in the above-described embodiments will be given the same reference numerals, and descriptions thereof will be omitted.

[0088] In the fifth embodiment, one of the path extensions 5b is also used as the closing means 11, but the ceiling structure 1E has a closing means 11E in addition to the path extensions 5b.

[0089] One of the two guide member bodies 5a in the ceiling structure 1E (the one on the right) is provided with multiple path extensions 5b as in the above-mentioned embodiment, while the other guide member body 5a (the one on the left) is provided with a closing means 11E instead of the path extensions 5b.

[0090] The closing means 11E is provided in the induction chamber S2. Specifically, the closing means 11E includes a base member 11E1 attached to the holding portion 5a3 of the induction member main body 5a so as to be movable in the up-down direction, and a plurality of sound-absorbing materials 11E2 attached to the base member 11Ea.

[0091] The base member 11E1 has a sliding portion 11E1a disposed along the surface of the holding portion 5a3 facing the induction chamber S2, and a contacted portion 11E1b extending from the lower end of the sliding portion 11E1a toward the induction chamber S2. The sliding portion 11E1a has an elongated hole 11E1a1 extending vertically and through which a support bolt B5 extending from the holding portion 5a3 into the induction chamber S2 is inserted. A nut N1 is threadedly engaged with the support bolt B5 to prevent the support bolt B5 from coming out of the elongated hole 11E1a1. With this configuration, the sliding portion 11E1a can slide vertically along the holding portion 5a3 within the range in which the support bolt B5 can move within the elongated hole 11E1a1. The contacted portion 11E1b extends from the lower end of the sliding portion 11E1a to a position facing the through-hole 2b. As a result, the contacted portion 11E1b comes into contact with the inserted portion 8b that has been inserted up to a predetermined height position.

[0092] The plurality of sound-absorbing materials 11E2 extend from the sliding portion 11E1a to positions between the adjacent path extension portions 5b so as to form a guide path P1 between the plurality of path extension portions 5b. The plurality of sound-absorbing materials 11E2 are also provided in the guide chamber S2 so as to come into contact with the path extension portions 5b when the contacted portions 11E1b are pressed by the inserted portion 8b inserted to a predetermined height position, thereby closing the guide path P1, as shown in FIG.

[0093] As described above, the base member 11E1 and the sound-absorbing material 11E2 constitute a displacement member attached to the induction chamber partition so as to be displaceable relative to the induction chamber partition portion (holding portion 5a3 and lid body 5c) so as to come into contact with the path extension portion 5b in response to pressure from the inserted portion 8b.

[0094] According to the sixth embodiment, when vibrations having an amplitude equal to or greater than a predetermined amplitude occur in the induction chamber dividing portion (holding portion 5a3 and lid body 5c), the displacement member can be displaced to close the induction path P1. [Explanation of symbols]

[0095] 1, 1A, 1B, 1C, 1D, 1E Ceiling structure 2 Ceiling surface materials 2b Through hole 3 Floor material 4, 4A Support member 5. 5C Heat induction material 5a2 Ceiling connection 5a3 Holding section (an example of an induction chamber partition section) 5b Route extension 5b1 fixed end 5b2 Vibration end 5b3 Elastic interposition part 5b4 Elastic member 5b5 Sound-absorbing materials 5c Lid (an example of an induction chamber partition) 5d, 5Cd opening 8 Stud (an example of an inserted component) 8b Inserted part 11, 11E Closing means DF lower floor room P1 Guidance route S1 Attic space S2 induction chamber UF Upper Floor Room

Claims

1. A ceiling structure of a building for guiding heat in a lower floor room to an upper floor room and suppressing sound transmission between the upper floor room and the lower floor room, A ceiling surface material facing the lower floor room; a floor surface material facing the upper floor room and provided above the ceiling surface material so as to form an attic space between the ceiling surface material and the floor surface material; a heat induction member including an induction chamber partition section provided in the ceiling space and partitioning an induction chamber for inducing heat, a ceiling connection section connecting the induction chamber partition section and the ceiling surface material through a through hole that passes through the ceiling surface material in the vertical direction, and an opening section formed in the induction chamber partition section so as to open the induction chamber to the ceiling space, the induction chamber partition is attached directly or indirectly to the floor surface material so that vibrations generated in the floor surface material are transmitted; A ceiling structure for a building, wherein the heat induction member has a fixed end fixed to the induction chamber partition and a vibrating end located away from the fixed end and capable of vibrating relative to the fixed end in response to vibration of the induction chamber partition, and has at least one path extension portion provided within the induction chamber to extend the path connecting the through hole and the opening.

2. The ceiling structure of a building as described in claim 1, wherein the path extension portion comprises an elastic member and a sound-absorbing member fixed to the elastic member so as to cover the outer surface of the elastic member and having higher sound-absorbing performance than the elastic member.

3. The ceiling structure of the building further includes a support member that supports the floor surface material, The ceiling structure for a building according to claim 1 or 2, wherein the induction chamber partition is attached to the support member.

4. The ceiling structure of a building according to claim 1 or 2 comprises: an insertion member provided in the lower room and having an insertion portion that is inserted into the induction chamber through the through hole in response to vertical vibration of the induction chamber partition; A ceiling structure for a building, further comprising a closing means provided in the induction chamber, which forms an induction path for guiding heat between the path extension portion and the induction chamber, and which is pressed by the inserted portion inserted into the induction chamber and comes into contact with the path extension portion when vibrations having an amplitude greater than a predetermined amplitude occur in the induction chamber partition, thereby closing the induction path.

5. The ceiling structure of a building according to claim 4 includes two of the path extension portions, The closing means has one of the two path extension portions, and by pressing the inserted portion, the one path extension portion is brought into contact with the other path extension portion, thereby closing the guide path.

6. The ceiling structure of a building described in claim 5 further comprises a third path extension located away from the one path extension and the other path extension so that vibration of the vibrating end is allowed when vibration having an amplitude equal to or greater than the predetermined amplitude occurs in the induction chamber compartment.

7. The ceiling structure of a building as described in claim 4, wherein the closing means has a displacement member attached to the induction chamber partition so as to be displaceable relative to the induction chamber partition so as to come into contact with the path extension portion in response to pressure from the inserted portion.

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