JP4306644B2 - Building ceiling structure - Google Patents

Description

  The present invention relates to a ceiling structure of a building such as a house or an apartment.

  Conventionally, as a measure for reducing the propagation of heavy floor impact sound from the upper floor to the lower floor of a house or the like, for example, a method of increasing the weight of the floor material of the upper floor or the ceiling material of the lower floor has been adopted. In this case, a great deal of weight is added. In RC houses, it is possible to increase the weight of flooring and ceiling materials without much trouble by changing the structure of pillars and beams. And in wooden houses, securing a structure that supports heavy flooring and ceiling materials often limits the freedom of design plans.

  For this reason, particularly in lightweight steel-framed prefabricated houses and wooden houses, a vibration isolation mechanism such as a vibration isolation rubber is interposed between the floor material and the floor beam of the upper floor, for example, in Patent Document 1 and Patent Document 2 As disclosed, by incorporating an anti-vibration mechanism such as anti-vibration rubber on the vibration transmission path in the ceiling support material that supports the ceiling plate of the lower floor, the heavy floor impact sound is reduced. .

JP 2001-107503 A Japanese Patent Application Laid-Open No. 11-1000093

  However, when anti-vibration rubber or the like is interposed between the floor material and the floor beam, the floor material easily shakes, walking vibration increases, and the habitability of the upper floor tends to decrease, and some countermeasures have been taken. Necessary. Furthermore, in addition to such walking vibration countermeasures, it is also necessary to consider floor subsidence countermeasures and creep countermeasures.

  In addition, when incorporating anti-vibration rubber etc. on the vibration transmission path in the ceiling base material, not only the design change of the ceiling base material is involved, but also the adjustment for reducing heavy floor impact sound becomes complicated, and adjustment However, there is a problem that the floor impact sound is easily transmitted if not enough.

  Therefore, the present invention eliminates the above-mentioned problems, does not deteriorate the feeling of walking, and does not give a great weight to the structure or does not involve a significant design change. An object is to provide a ceiling structure of a building that can reduce sound efficiently.

In order to solve the above-described problems, the ceiling structure of a building according to the present invention includes a dynamic damper 3 that is formed by combining a mass body 30 and an elastic body 31 with a ceiling base material 2 attached to a floor beam 1 of an upper floor. Is mounted such that the mass body 30 is elastically supported by the elastic body 31 .

Specifically, the ceiling base material 2 includes a field receiver 4 supported by being suspended from the floor beam 1 and a field receiver 4 not supported by being suspended from the floor beam 1. .. and a plurality of field edges 5 arranged in parallel to each other, and a plurality of field edges 5 arranged so as to be orthogonal to each other. The dynamic dampers 3 are attached to the plurality of field edge receivers 4 in the vicinity of the intersections of the receivers 4 ... and the plurality of field edges 5 ....

  Further, the field edge receiver 4 includes a pair of upper and lower flanges 6 and 7 and a web 8 that connects one end portions along the longitudinal direction of the flanges 6 and 7. The dynamic dampers 3 are mounted in a state of projecting in the horizontal direction. Further, the dynamic damper 3... Is integrally attached to the field edge receiver 4 in advance.

Furthermore, the distance between the plurality of field edges 4 and the distance between the plurality of field edges 5 is set to 300 to 500 mm.

  In the ceiling structure of the present invention, the dynamic damper provided on the ceiling base material does not deteriorate the feeling of walking on the floor of the upper floor, and the building structure as when raising the weight of the flooring or ceiling material. On the other hand, it is possible to reduce the heavy floor impact sound that propagates from the upper floor to the lower floor without giving much weight.

  In addition, the dynamic damper is mounted on the ceiling base material so that the mass body is elastically supported by the elastic body, and the mass body vibrates in response to the impact generated in the upper floor, so that it propagates to the lower floor. Because it is designed to reduce the heavy floor impact sound, it is not necessary to incorporate it into the vibration transmission path in the ceiling base material as in the conventional case, and thus it is simple without significant design change of the ceiling base material. It is possible to take measures to reduce the heavy floor impact sound only by adjustment.

  In addition, in a ceiling base material in which a plurality of field receivers and a plurality of field edges are assembled in a lattice shape, a dynamic damper is attached to the field receiver, thereby reducing the effect of reducing the heavy floor impact sound by the dynamic damper. It can be used efficiently throughout. In addition, the field edge receiver generally has higher rigidity than the field edge, and can stably mount the dynamic damper.

  In addition, by mounting the dynamic damper on the edge receiving web in a state of extending in the horizontal direction, the dynamic damper is prevented from protruding in the vertical direction from the ceiling base material, and piping and heat insulation in the underfloor space It is possible not to get in the way of construction. Furthermore, by using a field edge receiver with a dynamic damper attached in advance, it is possible to eliminate the installation work of the dynamic damper on-site and to reduce the weight floor impact sound by simply installing the field edge receiver on-site. Can be easily applied.

  In addition, by providing multiple dynamic dampers near the intersections of the field edge and the field edge, the dynamic dampers are evenly distributed over the entire ceiling, and the weight of the upper floor is Even if floor impact sounds are generated, these heavy floor impact sounds can be effectively reduced.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
As shown in FIGS. 1 to 3, the ceiling structure according to one embodiment of the present invention includes a plurality of dynamic dampers 3... On a ceiling base material 2 attached to a floor beam 1 made of H-shaped steel on an upper floor. Installed to reduce the propagation of heavy floor impact sound from upper floors to lower floors.

  The ceiling base material 2 includes a plurality of field ledges 4 arranged in parallel with each other, and a plurality of field ledges 5 arranged in parallel with each other so as to be orthogonal to the field edge receptacles 4. Are assembled in a grid pattern. As shown in FIG. 6, the field edge receivers 4... Are arranged on the same plane with an interval L1 of, for example, 300 to 500 mm, specifically about 330 mm. Similarly, the field edges 5 are also arranged on the same plane with a space L2 of, for example, 300 to 500 mm, specifically about 330 mm, below the field edge receivers 4. Note that a ceiling board 40 made of a plaster board is pasted between the lower surfaces of the field edges 5.

  The field edge receiver 4 is made of channel steel arranged so that the opening portion is directed to the side, and a pair of upper and lower flanges 6 and 7 and a web 8 that connects one end portions of the flanges 6 and 7 along the longitudinal direction thereof. And. A plurality of bolt insertion holes 9 and 10 are formed in the upper flange 6 and the web 8 at intervals in the longitudinal direction (see FIG. 5).

  And several of the field edge receivers 4... Are suspended and supported by suspension tools 11 attached to the floor beams 1. That is, several field edge receivers 4 that are not suspended and supported by the floor beam 1 are supported between the field edge supports 4 that are suspended and supported by the floor beam 1. The strength required for constructing the dynamic damper 3 in the ceiling base material 2 is secured. With the above structure, the overall rigidity of the ceiling base material 2 is improved, the effects of the dynamic dampers 3... Are spread throughout, and the mounting pitch of the dynamic dampers 3. .. can be placed. As shown in FIG. 2, the hanging tool 11 includes an engagement fitting 13 that engages with the lower flange 12 of the floor beam 1 and a suspension bolt 14 that is suspended from the engagement fitting 13. The lower end of 14 is inserted into the bolt insertion hole 9 of the upper flange 6 of the field receiver 4 and fixed by nuts 15 and 15.

  The field edge 5 is made of a steel tubular material having a substantially square cross section, and locking grooves 17 and 17 are formed in the side pieces 16 and 16 along the longitudinal direction thereof.

  These field edges 5... Are supported by a plurality of field edge supports 20 attached to the field edge receivers 4. As shown in FIGS. 2 and 4, the field edge support 20 includes a top surface 21 and a pair of side surfaces 22, 22 extending downward from a side edge of the top surface 21. Is formed. A pair of engaging pieces 23, 23 are formed on the upper surface portion 21 of the field edge support 20, and a pair of locking claws 24, 24 are formed on the side surface portions 22, 22, respectively.

  Then, by engaging the engagement pieces 23, 23 of the field edge support 20 with the lower flange 7 of the field edge receiver 4, the field edge support 20 is attached to the lower flange 7 of the field edge receiver 4. The upper part of the field edge 5 is inserted between the side surface parts 22 and 22 of the field edge support 20, and the locking claws 24 and 24 of the field edge support 20 are engaged with the locking grooves 17 and 17 of the field edge 5. By doing so, the field edge 5 is supported by the field edge support tool 20. Note that such support by the field edge support 20... Is provided at each intersection between the field edge receiver 4 and the field edge 5.

  In addition, a plurality of dynamic dampers 3 are mounted on the field edge receiver 4 in the vicinity of each intersection between the field edge receiver 4 and the field edge 5.

  As shown in FIGS. 2 and 5, the dynamic damper 3 includes a mass body 30 and an elastic body 31. The mass body 30 is formed of a substantially rectangular parallelepiped metal weight, and a screw hole 32 is formed on one side surface thereof. The elastic body 31 is configured by interposing an anti-vibration rubber 34 between a pair of plates 33 and 33, and a connecting bolt 35 is penetrated through the center of the plates 33 and 33 and the anti-vibration rubber 34. Then, the elastic body 31 and the mass body 30 are integrally assembled by screwing one end portion of the connecting bolt 35 of the elastic body 31 into the screw hole 32 of the mass body 30 and tightening.

  The dynamic damper 3 configured as described above has the other end portion of the connection bolt 35 of the elastic body 31 inserted into the bolt insertion hole 10 of the web 8 of the field receiver 4, and the other of the connection bolt 35. By tightening a nut 36 screwed into the end portion, the nut 8 is attached to the web 8 of the field receiver 4 having high rigidity.

  In this attached state, the dynamic damper 3 projects horizontally from the web 8 of the field receiver 4 along the field edge 5, and the mass body 30 is elastically supported by the elastic body 31. . The dynamic damper 3 is disposed so as to be within the height dimension of the web 8 of the field edge receiver 4 as shown in FIG. 2 and within the width dimension of the field edge 5 as shown in FIG. ing.

  In actual construction, a plurality of dynamic dampers 3 are integrally attached to each of the field edge receivers 4 in a factory or the like in advance, and the field edge receivers 4. As shown in FIG. 6, the dynamic dampers 3... Are uniformly distributed over the entire ceiling, simply by constructing the ceiling base material 2 by combining the.

  In such a ceiling structure, the resonance frequency of each of the dynamic dampers 3 is tuned to, for example, around 45 Hz, and heavy floor impact sound generated on the upper floor is transmitted from the floor beam 1 to the ceiling base material 2. As a result, the mass bodies 30 of the dynamic dampers 3 vibrate in the vertical direction, and the propagation of heavy floor impact sound to the lower floor is effectively reduced. It should be noted that the resonance frequency of each dynamic damper 3... Is not limited to being tuned to around 45 Hz, but may be appropriately tuned according to a frequency that requires a separate measure.

  The present invention is not limited to the above embodiment, and it is needless to say that many modifications and changes can be made to the above embodiment within the scope of the present invention.

It is a perspective view of the ceiling structure of the building concerning one embodiment of this invention. It is the longitudinal cross-sectional view similarly. It is the same top view. It is a disassembled perspective view of the ceiling base material similarly. It is a disassembled perspective view of a dynamic damper. It is a figure which shows arrangement | positioning of a dynamic damper.

Explanation of symbols

  1 .... floor beam, 2 .... ceiling base material, 3 .... dynamic damper, 4 .... field edge receiver, 5 .... field edge, 6, 7, ... flange, 8 .... web, 30 ... mass body, 31 .. Elastic body

Claims (4)

A dynamic damper (3), which is a combination of a mass body (30) and an elastic body (31), is attached to the ceiling base material (2) attached to the floor beam (1) of the upper floor. 31) A ceiling structure of a building mounted so as to elastically support the mass body (30) by 31) , wherein the ceiling base material (2) is suspended and supported by the floor beam (1). And a plurality of field receivers (4) arranged in parallel with each other, and a field receiver (4) that is not supported by being suspended from the floor beam (1). .. A plurality of field edges (5) arranged so as to be orthogonal to the plurality of field edges (4), a plurality of field edges (4), and a plurality of field edges (5)・ Installing the dynamic dampers (3) to the plurality of field receivers (4) in the vicinity of each intersection with Ceiling structure of the building, characterized in that was. The field edge receiver (4) includes a pair of upper and lower flanges (6) and (7), and a web (8) for connecting one end portions along the longitudinal direction of the flanges (6) and (7). The building ceiling structure according to claim 1 , wherein the dynamic dampers (3) are mounted on a web (8) of a field ledge (4) in a state of extending horizontally. The ceiling structure of a building according to claim 1 or 2 , wherein the dynamic damper (3) is integrally mounted in advance on the field edge receiver (4). The building ceiling structure according to any one of claims 1 to 3, wherein an interval between the plurality of field edges (4), and a distance between the plurality of field edges (5) are 300 to 500 mm. .