JP5454797B2 - Vibration suppression and sound insulation device for underfloor structure support - Google Patents

Description

  The present invention relates to an innovative vibration damping and sound insulation device that supports an underfloor structure on a floor slab (concrete slab) of a concrete frame and has improved vibration damping performance, sound insulation performance, and walking performance.

  Conventionally, an underfloor structure, for example, in a building having a concrete beam structure with a regular beam structure, a plurality of bundles are set on the floor slab, and a large pull is anchored to the frame edge, and a joist is placed on the large pull. Since the floor plate body is integrally connected, such as by laying the floor plate on the joist, the vibration applied to the floor plate body is increased from the joist, the large pull and the bundle through the floor slab, etc. It is transmitted as large vibration and noise to the living space of the house, especially downstairs. For this reason, it is necessary for the underfloor structure to take measures against vibration suppression and sound insulation against the vibration and noise.

  In such a background, in order to reduce vibration and noise transmitted from the floor plate body to other living spaces through the underfloor structure, development of a vibration-damping and sound-insulating underfloor structure with various improvements has been advanced.

  As described in the following patent document, the contents of the development are appropriately spaced between the floor slab and the floor plate body, inside the under floor structure, between the under floor structure and the floor plate body, and the like. However, if you try to improve vibration control performance, sound insulation performance and walking performance by simply adopting them, floor slab to floor plate body As a result of the significant increase in height and weight, the floor slab must be designed to be scaled up. On the other hand, the space above the floor is not affected by the underfloor structure, and is accompanied by a restriction that requires a space having a required height for living. For these reasons, it is extremely difficult to reduce the cost of the floor slab and the underfloor structure. Furthermore, from the viewpoint of promoting the extension of the life of the building and environmental measures, under the present situation where the regulation of remodeling of the building, the suspension work of the floor slab concrete in the building and the disposal of the scraps are strictly regulated, Renovation to a sound-insulating floor structure is extremely difficult in consideration of making use of the existing floor slab and securing an indispensable space on the floor.

Patent No. 4219653 “Floor Renovation Method for Buildings with Laying Flooring on Bundles” Outline: Bundled stones, wooden large-drawing material, joist material, scraping material, and flooring material were sequentially laid on the floor slab. The floor repair method for the underfloor structure reuses boulders, large draws, and joists, places height adjusters and cushions on the stones, and lays down and floors on the joists. Floor repair method. Patent No. 2646469 gazette “Floor structure of apartment houses, gymnasiums, office buildings, classrooms, etc. of RC-structured condominiums” Overview: A hydrolysis buffer material is provided between a floor base such as a concrete slab and a floor assembly. A floor structure in which a flooring material, a finishing material with a ventilation means, a finishing material, and a baseboard are provided to distribute air under the floor and indoors. No. 2719550, “Floor Structure of Concrete Buildings” Outline: A concrete building in which a plastic foam is bonded onto a concrete slab, and a lower surface void-type floor base material, a breathable material, and a floor finishing material are sequentially stretched thereon. The floor structure of things. Japanese Patent Laid-Open No. 2001-263420 “Anti-Vibration Legs and Anti-Vibration Unit Legs” Outline: An anti-vibration leg 8 is made of a metal having an elastic base and a threaded screw portion of a support at least on the upper side. It is composed of a rod-like leg, and a recess is formed on the elastic pedestal so that the lower end of the rod-like leg can be rotatably inserted from above, while the lower end of the leg is fitted on the upper surface of the elastic pedestal. Anti-vibration legs in which a flange body to be seated is provided continuously, and a locking portion for a tool for rotating the rod-shaped leg body is formed at the flange body or the rod-shaped leg portion at the top of the flange body and the upper end of the rod-shaped leg body. Body and anti-vibration unit legs. JP 2001-81891 A "Sound-insulating floor structure on floor slab" Outline: Horizontal frame part that divides each floor and projects a reverse beam integrally, a vertical frame part, and on the reverse beam, In a building in which a floor frame is constructed, a floor plate is laid on the floor frame, an above-floor space is formed on the floor plate, and an under-floor space is formed below the floor plate, the overhang is fitted through an elastic buffer. A sound insulating floor structure in which a hardware to be worn is supported by a pair of standing guide pieces, and a gap is formed between the edge of the large pull and the vertical frame portion. JP 2000-110331 A "Construction Method for Flooring" Outline: In a flooring construction method in which a plurality of flooring materials are bonded and laid on a floor base, both sides of a synthetic resin foam having a thickness of 0.4 to 1.0 mm Adhesive tape is applied to the floor substrate at intervals of 100 to 350 mm, the adhesive is applied thicker than the double-sided adhesive tape on the floor substrate located at the joint between the floor material and the floor material, and the floor material is laid on the floor material. Construction method. Japanese Patent Application Laid-Open No. 8-4185 "Floor Structure of Building" Outline: A large pull is installed between reverse beams protruding on a horizontal frame, and a flooring is supported on the large pull through a joist. The floor structure of the building has a gap between the end of the large pull and the end of the flooring and the inverted large beam, and the large pull is an elastically deformable Σ-shaped steel that improves sound insulation.

  In the present invention, the floor slab and the underfloor structure are vibration-insulated and engaged, and the low-height and easy-to-assemble light weight and robust underfloor structure improves vibration damping performance, sound insulation performance, and walking performance, Moreover, in new buildings, the floor slab thickness can be reduced to the minimum required for structural performance without making the floor slab into a complex cross-section structure, and the cost can be greatly reduced. The present invention provides an innovative vibration control and sound insulation device that can utilize an existing floor slab and secure an indispensable space on the floor.

  A vibration damping and sound insulation device according to the present invention is a vibration damping and sound insulation device that supports an underfloor structure on a floor slab, and a leg that supports a large pull beam constituting the underfloor structure, and the leg. A pedestal that supports the lower end of the pedestal, and an elastic buffer interposed between the pedestal and the floor slab, and the elastic buffer is connected to the pedestal and the floor through a vertical through-hole provided in the pedestal. It is the structure formed from the elastic resin with which it filled between slabs.

Specifically, the vibration damping and sound insulation device of the present invention can be implemented as follows. That is,
(1) The pedestal is a π-type pedestal having an upward convex portion in the center, the leg is supported upward by the convex portion of the π-type pedestal, and the through hole is formed on the π-type pedestal. It can be provided on the blades on both sides of the convex part.
(2) The leg comprises a bolt that penetrates the bottom plate at an intermediate position between both ends in the length direction of the large beam, and a pair of upper and lower nuts that are screwed into the bolt and sandwich the bottom plate. By adjusting the height of the pair of upper and lower nuts, the position of the pedestal with respect to the large pull beam can be adjusted up and down.
(3) The pedestal can be arranged in the horizontal direction perpendicular to the length direction of the large beam so that the wing plate portions on both sides of the convex portion protrude from the left and right sides of the large beam.
(4) When the large pull beam has a hollow rectangular cross section, air flow holes are provided on the side surface at appropriate intervals in the length direction, and the large pull beam is directly above the leg in the side view of the large pull beam. Can be provided with the air circulation hole.

  By supporting the underfloor structure on the floor slab using the vibration damping and sound insulation device of the present invention, the vibration suppression performance, sound insulation performance and walking performance of the underfloor structure supporting the floorboard body are remarkably increased. In new buildings, the floor slabs can be made thinner and the cost can be significantly reduced. In renovated buildings, the existing floor slabs can be utilized and necessary ground space can be secured. be able to.

FIG. 1 is a partially cutaway perspective view showing an embodiment of the present invention. FIG. 2A is a longitudinal side view of the large drawing beam viewed from the lateral side, and FIG. 2B is an enlarged view of a portion A in FIG. 2A. FIG. 3 is a front view of the large pull beam viewed from the end face side, showing the both-end vibration damping and sound insulation apparatus. FIG. 4 is a longitudinal front view of the large pull beam at the sub beam connecting position, showing the intermediate vibration damping and sound insulating device. 5A to 5E are longitudinal sectional front views showing various cross-sectional structures of the large pull beam.

  The first embodiment of the present invention will be described in detail with reference to FIGS. 1 to 5. The underfloor structure 1 of this embodiment is disposed between a floor slab 2 and a floor plate body 3. A plurality of large beam 4, a plurality of sub-beams 5, an upper vibration isolation connection portion 6, and a lower vibration isolation connection portion 7 are configured. The large draw beam 4 is arranged parallel to each other on the floor slab 1, and the sub beam 5 connects adjacent large draw beams 4, and is arranged parallel to each other in a direction orthogonal to the large draw beam 4. .

  The large pull beam 4 is made of a hollow building material made of metal and having a substantially rectangular cross-sectional shape, and a plurality of air flow holes 8 are notched on the side surface thereof. A cutout portion 9 for joining to the sub beam 5 is provided in an inverted L shape from the side surface to the upper surface. The large draw beam 4 is arranged so that both ends thereof are positioned on the beam portion 10 supporting the floor slab 1. The large pull beam 4 is not limited to the hollow rectangular cross section, but the large pull beam 4A having a grooved cross section with a lip shown in FIG. 5A, the large pull beam 4B having a groove shape with no lip shown in FIG. 5B, and FIG. H-shaped cross-section large drawing beam 4C shown in FIG. 5D, a modified hollow rectangular cross-section large drawing beam 4D shown in FIG. 5D, and a Σ-shaped cross-section large drawing beam 4E shown in FIG. Various cross-sectional shapes can be used.

  The sub beam 5 may not need to be arranged depending on the arrangement interval of the large pull beam 4, the strength of the floor plate body 3, the load distribution on the upper surface of the floor plate body 3, or the like. The sub beam 5 employed in this embodiment is a metal building material having a U-shaped cross section with a lower open shape, which is disposed in parallel with each other between the upper portions of the side surfaces of the large pull beam 4, and has both ends in the length direction. A pair of left and right downward hooks 11 are integrally formed. In addition to the U-shaped cross section of the illustrated embodiment, the sub beam 5 has a lip-shaped groove-shaped cross section, a lip-free groove-shaped cross section, a Σ-shaped cross section, an H-shaped cross section, and the center of both side plates. Various cross-sectional shapes such as a deformed hollow rectangular cross-section with a recess and a Y-shaped cross-section can be used.

  The large pull beam 4 and the sub beam 5 are connected to the notch 9 of the large pull beam 4 by inserting the hook 11 of the sub beam 5 from above and detachably fitting. Any appropriate joining means can be employed. In the underfloor structure 1 of this embodiment, since the sub beam 5 can be detachably connected to the large pull beam 4 within a range of the height by a simple construction method, the height of the underfloor structure 1 is Therefore, the underfloor structure 1 can be suppressed to be within the height range of the large pull beam 4 and has a low overall height and a light weight. For this reason, it is possible to reduce the weight of the floor slab 2 in the new construction, and to significantly reduce the construction cost of the floor slab 2, and in the renovation construction, the ground slab 2 can be constructed while maintaining the current status. This is an excellent effect.

  The floor plate body 3 is laid on the upper surface of the large pull beam 4 via an elastic buffer body 12 constituting the upper vibration isolation connecting portion 6. The floor board 3 is composed of a wooden particle board (floor panels such as various veneer plywoods and chip compression bodies) 13 and a flooring material 14 such as a solid wood board and a decorative plywood disposed thereon. The elastic buffer body 12 is made of a synthetic resin rubber having pressure resistance and vibration resistance, and is adhesively bonded to the upper surface of the large pull beam 4 on its flat lower surface, and the floor plate body 3 is mounted on the flat upper surface by adhesive bonding. I support it. Due to the presence of the upper vibration insulation connecting portion 6 made of the elastic buffer body 12, the workability of the floor board body 3 is improved and the floor board body 3 is placed and supported on the large pull beam 4 (underfloor structure 1) in a non-interfering manner. As a result, it is possible to improve vibration control and walking.

  The lower vibration isolation connecting portion 7 includes a both-end vibration damping / sound isolating device 15 and an intermediate vibration damping / sound isolating device 16 disposed between each large pull beam 2 and the floor slab 1. The both-end vibration damping / sound insulation device 15 is disposed at both ends in the length direction of the large pull beam 2, and includes an inverted π type beam mounting seat 17, a pair of left and right π type pedestals 18a and 18b, and each π type. Legs 19a and 19b erected on the bases 18a and 18b, an elastic buffer 20 interposed between the beam mounting seat 17 and the bottom surface of the large pull beam 2, and each of the π-type bases 18a and 18b. It is comprised from the elastic buffer bodies 21a and 21b interposed between the floor slabs 1. FIG. According to the both-end vibration damping / sound insulation device 15, the end of the large pulling beam 2 is fitted into the central recess of the upper opening of the beam mounting seat 17 via the elastic buffer 20, and the elastic buffer is formed on the lower surface. A pair of left and right π-type pedestals 18a and 18b to which 21a and 21b are bonded are installed on the floor slab 1, and a pair of upper and lower nuts 22a and 22b screwed to the legs 19a and 19b of the π-type pedestals 18a and 18b. The beam mounting seat 17 is supported by sandwiching both blade portions of the beam mounting seat 17 between them. The beam mounting seat to be supported is adjusted by adjusting the height of the pair of upper and lower nuts 22a and 22b. The height on the floor slab 1 of 17 (the end of the large pull beam 2) can be adjusted. In this way, by adjusting the support heights at both ends of the large pull beam 2 by the both-end vibration damping and sound insulation device 15, all the large pull beams 2 can be supported horizontally according to a predetermined level.

  Each leg 19a, 19b is made up of a bolt penetrating upward into a central convex portion of the lower release of the π-type pedestals 18a, 18b, and bolt heads 23a, 23b fitted into the central convex portion The center protrusions of the π-type bases 18a and 18b are sandwiched by the presser nuts 24a and 24b screwed into the bolts, and the bolts are fixed to the π-type bases 18a and 18b, thereby constituting the leg bodies 19a and 19b. . Further, when the support height of the large pull beam 2 is high, or when a heavy object is placed on the floor plate body 3, as shown in FIGS. 3 and 5, a pair of left and right π-type pedestals 18a, 18b is connected and integrated by the connecting member 25, so that the buckling strength can be increased by using the both-end vibration damping and sound insulation device 15 as a rectangular frame structure instead of a portal structure.

  According to the both-end vibration damping / sound insulation device 15 having the above-described configuration, vibrations such as left and right and up and down from the large pull beam 4 are caused by the elastic buffer 20, the beam mounting seat 17, the pair of legs 19a and 19b, and the π-type pedestal 18a. , 18b and elastic shock absorbers 21a, 21b are sequentially absorbed through the floor slab 2 and are absorbed and buffered, and the load load transmitted from the floor slab 2 to the beam portion 10 is greatly reduced. The pedestal 17 is an inverted π-type hardware, and both wing plate portions are supported by the legs 19a and 19b, and the pedestals that support the legs 19a and 19b are π-type pedestals 18a and 18b. Since the leg 19a, 19b is supported by the central convex portion, the both ends damping / sound insulation device 15 as a whole exhibits an excellent elastic cushion function for the large pull beam 4.

  The intermediate vibration damping / sound isolating device 16 is disposed at predetermined intervals between both ends in the length direction of the large pull beam 4, and stands vertically on the π-type pedestal 26 and the central convex portion of the π-type pedestal 26. The leg 27 is provided, and an elastic buffer 28 interposed between the slats on both sides of the central convex portion of the π-type pedestal 26 and the floor slab 2. The leg 27 is formed of a bolt, and the bolt is passed through the central convex portion of the lower release of the π-type pedestal 26 upward, and is screwed into the bolt head 29 and the bolt which are fitted in the central convex portion. A leg 27 is configured by sandwiching the central convex portion of the π-type pedestal 26 between the pressed nut 30 and fixing the bolt to the π-type pedestal 26. Then, the leg 27 is passed through the bottom plate of the large beam 4 upward, and the bottom plate of the large beam 4 is sandwiched between a pair of upper and lower nuts 31 and 32 screwed into the leg 27. The intermediate damping / sound isolating device 16 is located below the large pulling beam 4 so that the blades on both sides of the central convex portion of the π-type pedestal 26 project to the left and right sides of the large pulling beam 4 as shown in the figure. The mold pedestal 26 is attached in a state in which the mold pedestal 26 is laterally oriented perpendicular to the length direction of the large pull beam 4. The elastic buffer 28 is inserted into the gap between the blade plates of the π-type pedestal 26 and the floor slab 2 from the through holes 33 provided in the blade portions on both sides of the central convex portion of the π-type pedestal 26. It is formed by filling the elastic resin using the elastic resin filler 34.

  The intermediate vibration damping / sound insulation device 16 adjusts the fastening height of the nuts 31, 32 to adjust the support height of the intermediate portion of the large pull beam 4, and the load load applied to the both ends vibration damping / sound insulation device 15. In addition, the horizontal and vertical vibrations of the large beam 4 can be absorbed and buffered to suppress the propagation of noise and vibration to the floor slab 2, and the large beam 4 can be prevented from bending.

  The air circulation hole 8 provided on the side surface of the large draw beam 4 forms an air flow passage in the direction crossing the large draw beam 4 in the underfloor structure 1, and at the same time, equipment piping, an air port for air conditioning, etc. However, when the intermediate vibration damping and sound insulation device 16 having the above-described structure is attached to the large pull beam 4 having a rectangular hollow cross section, as shown in FIG. The air circulation hole 8 and the intermediate vibration suppression / sound insulation device 16 can be arranged so that the air circulation hole 8 is positioned directly above the intermediate vibration suppression / sound insulation device 16.

The effects of the configuration according to the above embodiment are listed as follows.
○ A low floor of about 138mm can be realized despite the double floor.
○ Sound transmission can be reduced by eliminating the bundle of vibration transmission media.
○ Without relying on floor slab thickness for sound insulation performance, it is possible to prevent the increase in slab thickness, which is not necessary in terms of structure, and to reduce the weight of the entire building.
○ If the floor slab is reduced to 135mm, the building construction cost can be reduced in the pillars, beams, foundations, etc. of the building. 8-30% reduction can be achieved in comparison with.
○ Equipment costs can be reduced by eliminating the need for installation of equipment wiring and piping into the housing.
○ Equipment wiring and piping can be exposed, maintenance can be performed easily, labor, time and cost can be reduced, and the cost burden can be greatly reduced.
○ Since the idea of separating the housing from the residential floor can easily cope with changes in maintenance and living environment, it is in common with the idea of SI housing itself promoted by the Ministry of Land, Infrastructure, Transport and Tourism. Life).
○ From the above, a highly durable housing that can be realized will enable long and safe use of the building, greatly contributing to the reduction of life cycle costs.

  The vibration damping and sound insulation device for supporting a floor structure according to the present invention enhances the vibration damping performance, sound insulation performance, and walking performance of a floor having a double beam structure in a building having a floor slab having a regular beam structure. It can be used as a means.

DESCRIPTION OF SYMBOLS 1 Underfloor structure 2 Floor slab 3 Floor plate body 4,4A-4E Large draw beam 5 Sub beam 6 Upper vibration insulation connection part 7 Lower vibration insulation connection part 8 Air flow hole 9 Notch part for sub beam connection 10 Beam part 11 Hook 12 , 20, 21a, 21b, 28 Elastic shock absorber 13 Particle board 14 Flooring material 15 Both-end vibration damping / sound insulation device 16 Intermediate vibration damping / sound insulation device 17 Reverse π-type beam mounting seats 18a, 18b, 26 π-type pedestal 19a , 19b, 27 Legs 22a, 22b, 31, 32 Nuts 23a, 23b, 29 Bolt heads 24a, 24b, 30 Presser nuts 25 Connecting material 33 Through hole 34 Elastic resin filler

Claims (5)

A vibration damping and sound insulation device for supporting an underfloor structure on a floor slab, a leg that supports a large beam constituting the underfloor structure, a pedestal that supports a lower end of the leg, and the pedestal An elastic buffer interposed between the floor slab, and the elastic buffer is formed of an elastic resin filled between the base and the floor slab through a vertical through hole provided in the base. A vibration-suppressing and sound-insulating device for supporting under-floor structures . The pedestal is a π-type pedestal having an upward convex portion in the center, the leg is supported upward by the convex portion of the π-type pedestal, and the through hole is a convex portion of the π-type pedestal. The vibration suppression and sound insulation device for supporting an underfloor structure according to claim 1, wherein the vibration suppression and sound insulation device is provided on each of the blade portions on both sides . The said pedestal is arrange | positioned in the horizontal direction orthogonal to a large drawing beam length direction so that the wing | blade part of the convex part both sides may protrude on both the right and left sides of a large drawing beam. Vibration suppression and sound insulation device for underfloor structure support. The leg is composed of a bolt that penetrates the bottom plate at an intermediate position between both ends in the length direction of the large pull beam, and a pair of upper and lower nuts that are screwed into the bolt and sandwich the bottom plate. The vibration damping and sound insulating device for supporting an underfloor structure according to any one of claims 1 to 3, wherein the position of the pedestal with respect to the large beam can be adjusted up and down by adjusting the height of the nut. The large draw beam has a hollow rectangular cross section, and air flow holes are provided on the side surfaces thereof at appropriate intervals in the length direction. The vibration suppression and sound insulation device for supporting an underfloor structure according to any one of claims 1 to 4, wherein an air circulation hole is disposed.

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