Ceiling Hanger

Abstract

To provide a ceiling hanger capable of improving sound insulation by reducing propagation of the noise generated on an upper floor to a lower floor ceiling.SOLUTION: A ceiling hanger 1 includes a floor side fixing part 2 fixed to the floor side of an upper floor, a ceiling support part 3 supporting a lower floor ceiling structure, a first vibration isolation part 4 provided in the floor side fixing part and suppressing vibration propagation from the floor side, and a second vibration isolation part 341 provided in the ceiling support part and suppressing vibration propagation to the lower floor ceiling structure. The vibration isolating characteristic of the first vibration isolation part 4 is different from the vibration isolating characteristic of the second vibration isolation part 341.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a ceiling suspension device that can reduce the transmission of noise generated on an upper floor to the ceiling of a lower floor. [Background technology]

[0002] Patent Document 1 discloses a ceiling hanging fixture including a main body, a beam screw, a joist screw, a joist nut, and an anti-vibration rubber member. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2018-119326 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, the above-mentioned ceiling hanging fitting can only exert vibration-damping (sound-proofing) performance by means of the above-mentioned vibration-proof rubber member.

[0005] The present invention provides a ceiling suspension device that can improve soundproofing by reducing the propagation of noise generated on an upper floor to the ceiling of a lower floor. [Means for solving the problem]

[0006] The ceiling suspension device of the present invention comprises a floor side fixing part which is fixed to the floor side of the upper floor, A ceiling support portion that supports a lower floor ceiling structure; A first vibration isolation part provided on the floor side fixed part to suppress vibration propagation from the floor side; A second vibration isolation section having vibration isolation characteristics different from those of the first vibration isolation section and provided on the ceiling support section to suppress vibration propagation to the lower floor ceiling structure; The present invention is characterized by comprising:

[0007] With the above configuration, vibrations from the upper floor are suppressed by the first vibration isolation part attached to the floor-side fixed part, and further, vibrations propagating through the ceiling hanger are prevented from propagating to the lower floor ceiling structure by the second vibration isolation part. Furthermore, the difference in vibration isolation characteristics between the first vibration isolation part and the second vibration isolation part makes it possible to suppress noise over a wide frequency range.

[0008] The first vibration-isolating part may be made of a vibration-isolating plate that contacts a member that constitutes the floor side. This makes it possible to obtain a structure that blocks vibration propagation from the floor side to the ceiling hanger itself.

[0009] The first vibration isolation part may be disposed so as to sandwich the horizontally disposed plate-shaped part constituting the floor side from above and below. With this, the floor-side fixing part can be fixed to the floor side of the upper floor via the first vibration isolation part.

[0010] The second vibration-isolating section may be made of a curved plate having two or more plate sections whose spacing varies in the vertical direction, which makes it easy to obtain vibration-isolating characteristics in the second vibration-isolating section that are different from those in the first vibration-isolating section.

[0011] The second vibration-isolating portion may be included in a base material support portion to which a base material receiving member that supports a ceiling base material is fixed. This allows the use of a base material receiving member that does not have vibration-isolating properties.

[0012] Alternatively, the second vibration-isolating portion may be provided in a foundation material receiving member that supports the ceiling foundation material, which reduces the number of parts in the ceiling hanger. Effect of the Invention

[0013] The present invention has the effect of improving the ability to suppress the propagation of noise generated on an upper floor to the ceiling of a lower floor. [Brief description of the drawings]

[0014] [Figure 1]1 is a plan view, a front view, and a side view of a ceiling suspension device according to an embodiment. [Diagram 2] FIG. 2 is a perspective view of the ceiling suspension device according to the embodiment. [Diagram 3] FIG. 2 is a perspective view of the ceiling suspension device according to the embodiment. [Figure 4] This graph shows, in dotted lines, the vibration damping characteristics of a suspension device having a structure that does not have either the first or second vibration-isolating section, compared to the ceiling suspension device structure of Figure 1, and in solid lines, the vibration damping characteristics of a suspension device having a structure that does not have the first vibration-isolating section, but only the second vibration-isolating section, compared to the ceiling suspension device structure of Figure 1. [Diagram 5] This is a graph showing, with a dotted line, the vibration damping characteristics of a hanger having a structure that does not have either the first or second vibration-isolating part, compared to the ceiling hanger structure in Figure 1, and with a solid line, the vibration damping characteristics of a hanger having a structure that does not have the second vibration-isolating part and has only the first vibration-isolating part, compared to the ceiling hanger structure in Figure 1, where (A) shows the range from 1 Hz to 100 Hz, and (B) shows the range from 100 Hz to 1000 Hz. [Figure 6] FIG. 6 is an explanatory diagram showing a floor-ceiling simulated structure when the vibration damping characteristics of FIG. 4 and FIG. 5 were measured. [Figure 7] This is a graph showing the floor impact sound insulation performance of the ceiling hanger in Figure 1 (with leaf spring rubber), the floor impact sound insulation performance of a hanger with a structure (with leaf spring) that does not have a first vibration-isolating part but has a second vibration-isolating part compared to the structure of the ceiling hanger in Figure 1, and the floor impact sound insulation performance of a hanger with a structure (without leaf spring) that does not have either the first or second vibration-isolating part compared to the structure of the ceiling hanger in Figure 1. [Figure 8] FIG. 13 is a perspective view showing a modified example of the ceiling suspension device of the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] An embodiment according to one aspect of the present invention will be described below with reference to the accompanying drawings. As shown in Figures 1, 2 and 3, a ceiling suspension device (metal fitting) 1 of the embodiment includes a floor-side fixing part 2 and a ceiling support part 3. The floor-side fixing part 2 is fixed to the floor side of the upper floor, and the ceiling support part 3 supports the ceiling structure of the lower floor.

[0016] The floor side fixed part 2 comprises a support main body part 21, a sliding clamping plate 22 that slides vertically relative to the support main body part 21, and a fixing operation member 23 that moves the sliding clamping plate 22 vertically relative to the support main body part 21.

[0017] The support body 21 is composed of a first horizontal section 211, a vertical section 212 extending upward from the first horizontal section 211, and a second horizontal section 213 extending horizontally from an upper portion of the vertical section 212 in the opposite direction to the first horizontal section 211. The first horizontal section 211, the vertical section 212, and the second horizontal section 213 are reinforced by rising ribs formed by bending both edges thereof.

[0018] A vertical through hole is formed in the first horizontal portion 211 at a location closer to the vertical portion 212 than its tip, and a bolt which is the fixing operation member 23 is inserted into this through hole with its head facing down.

[0019] A guide hole 212a that is long in the vertical direction is formed in the vertical portion 212. A caulking pin 212b having a body that fits into the guide hole 212a and a head that is wider than the guide hole 212a is slidably positioned in the guide hole 212a.

[0020] The second horizontal portion 213 has a through hole formed in the vertical direction.

[0021] Moreover, the slide clamp plate 22 has a horizontal portion 221 and a vertical portion 222 extending upward from the horizontal portion 221. The horizontal portion 221 and the vertical portion 222 are reinforced by rising ribs formed by bending both edges of the horizontal portion 221 and the vertical portion 222. The rising ribs are located inside the rising ribs of the support body 21.

[0022] A through hole is formed in the horizontal portion 221 in the vertical direction, and a nut 221a having a screw hole aligned with this through hole is fixed to the upper surface of the horizontal portion 221. The tip side of the fixing operation member 23 is screwed into the nut 221a.

[0023] The crimping pin 212b is fixed to the rear side of the vertical portion 222. The crimping pin 212b is guided by the guide hole 212a, so that the slide clamp plate 22 moves in the vertical direction without coming off the support body portion 21.

[0024] A first vibration-isolating part 4 for suppressing vibration propagation from the floor side is attached to the upper surface of the first horizontal part 211 and the lower surface of the horizontal part 221. In this embodiment, the first vibration-isolating part 4 is made of a vibration-isolating plate. The height of the vibration-isolating plate attached to the upper surface of the first horizontal part 211 is made higher than the height of the rising rib part. As the vibration-isolating plate, an elastic plate such as a rubber plate, a silicon plate, or a foamed resin plate is used. In this embodiment, a rubber plate is used as the vibration-isolating plate, and this rubber plate is a rubber molded product whose main raw material is, for example, ethylene propylene rubber.

[0025] The ceiling support part 3 comprises a hanging bolt 31 inserted into the through hole of the second horizontal part 213, a lower nut 32 and an upper wing nut 33 for fixing the hanging bolt 31 to the second horizontal part 213, a base material support part 34, and a nut 35 for fixing the base material support part 34 to the hanging bolt 31.

[0026] A base material support member 9 that supports a light-gauge steel frame joist support 7, which is a ceiling base material, is fixed to the base material support portion 34 with screws 36. In addition, a second vibration isolation portion 341 that suppresses vibration propagation to the ceiling structure on the lower floor is formed on the upper portion of the base material support portion 34.

[0027] The second vibration isolating part 341 is made of a leaf spring (a bent plate having a semicircular bent part) having two upper and lower plate parts 341a and 341b whose interval changes in the vertical direction. The plate parts 341a and 341b are made of, for example, SUS301, have a plate thickness of 0.9 mm, and a spring constant of 1.7×10 5N / m. A through hole through which the bolt of the hanging bolt 31 is inserted is formed in the upper plate portion 341a, and the thin head of the hanging bolt 31 is located between the two plate portions 341a and 341b. A through hole through which the head of the hanging bolt 31 can be inserted is formed in the lower plate portion 341b, and the hanging bolt 31 can be attached after bending the plate portions 341a and 341b. Since the head of the hanging bolt 31 does not contact the plate portion 341b, the head does not interfere with the vibration of the plate portion 341b (shock absorption by the bending portion between the plate portions 341a and 341b). The base material support portion 34 is fixed to the hanging bolt 31 by the head of the hanging bolt 31 and a nut 35. In addition, the base material receiving member 9 (rafter receiving 7) is not located below the downward extension line of the center of the hanging bolt 31, but is located away from the downward extension line in a direction away from the bending point between the plate portions 341a, 341b.

[0028] This ceiling hanger 1 can be attached to the horizontally arranged plate-like portion constituting the floor side, for example, the lower flange portion of an H-shaped steel. In this attachment work, the fixing operation member 23 is rotated to sandwich the lower flange portion from above and below between the first horizontal portion 211 of the support main body 21 and the horizontal portion 221 of the slide clamping plate 22. As a result, the ceiling hanger 1 is fixed to the lower flange portion with the first vibration isolation portion 4 interposed between the first horizontal portion 211 and the lower flange portion, and between the horizontal portion 221 and the lower flange portion, respectively.

[0029] Furthermore, the height position of the hanging bolt 31 is adjusted, and this hanging bolt 31 is fixed to the second horizontal part 213 of the support body part 21. Then, the furring strip support 7 is supported by the base material support member 9. A furring strip (not shown) is attached to the furring strip support 7.

[0030] With the above configuration, vibrations from the floor side of the upper floor are suppressed by the first vibration isolation part 4 attached to the floor-side fixed part 2, and further, vibrations propagating through the ceiling hanger 1 are prevented from propagating to the joist support 7 by the second vibration isolation part 341. And, because the vibration isolation characteristics of the first vibration isolation part 4 and the second vibration isolation part 341 are different, it becomes possible to suppress noise over a wide frequency range.

[0031] In this embodiment, the first vibration-isolating part 4 is made of a rubber plate and the second vibration-isolating part 341 is made of a leaf spring, so that it is easy to make the vibration-isolating characteristics of the first vibration-isolating part 4 and the vibration-isolating characteristics of the second vibration-isolating part 341 different.

[0032] FIG. 4 is a graph showing, with a dotted line, the vibration damping characteristics (amount of damping at each vibration frequency) of a suspension device that has a structure that does not have either the first vibration-isolating part 4 (rubber plate) or the second vibration-isolating part 341 (leaf spring) compared to the structure of the ceiling suspension device 1, and with a solid line, the vibration damping characteristics (amount of damping at each vibration frequency) of a suspension device that has a structure that does not have the first vibration-isolating part 4 (rubber plate) but only the second vibration-isolating part 341 (leaf spring) compared to the structure of the ceiling suspension device 1, showing the range from 1 Hz to 100 Hz.

[0033] According to this graph, the structure having the second vibration isolation portion 341 (leaf spring) exhibited an average damping effect of 20 dB or more in the one octave band range of 63 Hz.

[0034] FIG. 5 is a graph showing, with a dotted line, the vibration damping characteristics (amount of damping at each vibration frequency) of a suspension device having a structure that does not have either the first vibration-isolating part 4 (rubber plate) or the second vibration-isolating part 341 (leaf spring) compared to the structure of the ceiling suspension device 1, and with a solid line, the vibration damping characteristics (amount of damping at each vibration frequency) of a suspension device having a structure that does not have the second vibration-isolating part 341 (leaf spring) and only the first vibration-isolating part 4 (rubber plate), with FIG. 5(A) showing the range from 1 Hz to 100 Hz, and FIG. 5(B) showing the range from 100 Hz to 1000 Hz.

[0035] As can be seen from these graphs, the structure with the first vibration-isolating part 4 showed a large vibration-isolating effect in the one-octave band range of 31.5 Hz, which is effective in improving hearing. Also, for the mid-range, a slight effect was seen in the one-octave band range of 125 Hz and the one-octave band range of 500 Hz.

[0036] FIG. 6 is an explanatory diagram showing the floor-ceiling simulation structure when the vibration damping characteristics were measured. The floor side of this floor-ceiling simulation structure is composed of two beams 501 made of H-shaped steel and a concrete floor slab 502 placed on these beams 501. The lower floor ceiling structure in the floor-ceiling simulation structure is composed of two joists 504, a joist support 503 that supports the joists 504, and a weight 505 suspended from the two joists 504. The joist supports 503 are fixed to the lower flanges of each beam 501 by four ceiling hangers 1. A vibration generator 506 is placed on the floor slab 502, and vibration sensors (not shown) are attached to the joist support 503 and the lower flange. The height of the beam 501 made of H-shaped steel is 250 mm. In addition, in the test without the rubber plate, the ceiling hanger 1 was used without the first vibration isolation part 4 (rubber plate). In the test without the leaf spring, the base material support part 34 of the ceiling hanger 1 was replaced with a base material support part without the second vibration isolating part 341. The arrangement pitch of the ceiling hangers was 910 mm. The weight 505 was the converted value of the arrangement pitch of the ceiling hanger 1, 910 mm.

[0037] FIG. 7 is a graph showing the floor impact sound insulation performance (floor impact sound level at each octave band center frequency) of the ceiling hanger 1 (with leaf spring and rubber), the floor impact sound insulation performance of a hanger with a structure (with leaf spring) that does not have the first vibration isolating part 4 (rubber plate) but has the second vibration isolating part 341 compared to the structure of the ceiling hanger 1, and the floor impact sound insulation performance of a hanger with a structure (without leaf spring) that does not have either the first vibration isolating part 4 or the second vibration isolating part 341 compared to the structure of the ceiling hanger 1. The floor impact sound insulation performance of the ceiling hanger 1 (with leaf spring and rubber) is shown by a solid line, the floor impact sound insulation performance of the structure with leaf spring is shown by a dotted line, and the floor impact sound insulation performance of the structure without leaf spring is shown by a dashed line. The conditions (floor and ceiling structure) for measuring the floor impact sound insulation performance of FIG. 7 are outlined below. In addition, an underground reverberation room is installed below the floor and ceiling structure.

[0038] (1) Height of H-shaped steel beam: 250 mm (2) Length of the small beam: 2,730 mm (The small beam is connected to both ends of the small beam in the longitudinal direction in an orthogonal arrangement with the large beam, and the large beam is fixed to the support base.) (3) Beam pitch: 910-1820-910mm (4 beams) (4) Ceiling suspension fixture placement pitch → Orthogonal to the small beams: 910-1820-910mm (Ceiling suspension fixtures are attached to both the left and right sides of the bottom flanges of the two central small beams of the four small beams. The two end small beams are fixed to the support base.) → Parallel to the beam: 910mm

[0039] As can be seen from the graph of floor impact sound insulation performance in Figure 7 above, a structure (with leaf springs) having the second vibration isolating part 341 exhibits a relatively large sound insulation effect of about 2.5 dB in the 63 Hz band. And, a ceiling hanger 1 having both the first vibration isolating part 4 and the second vibration isolating part 341 exhibits a shared noise attenuation by the first vibration isolating part 4 and the second vibration isolating part 341 in different frequency ranges, and an effect of suppressing noise is observed over a wide frequency range.

[0040] 7 above does not measure the floor impact sound insulation performance of a suspension device with a structure in which there is only a rubber plate that has the first vibration isolation part 4 and no second vibration isolation part 341 in relation to the structure of the ceiling suspension device 1, but compared to the noise attenuation caused by the single installation of the first vibration isolation part 4 and the second vibration isolation part 341, with the ceiling suspension device 1, a synergistic noise attenuation performance can be expected by providing both. Also, it is possible to conduct further experiments to find the optimum frequency range for the noise attenuation sharing between the first vibration isolation part 4 and the second vibration isolation part 341.

[0041] In the above embodiment, the second vibration-isolating portion 341 is formed in the base material support portion 34 to which the base material receiving member 9 that supports the joist support 7, which is the ceiling base material, is fixed, so a base material receiving member 9 that does not have vibration-isolating properties can be used. On the other hand, as shown in Fig. 8, a base material receiving member 9A in which a base material receiving portion is integrated into the base material support portion 34 having the second vibration-isolating portion 341 can be used. This allows the number of parts in the ceiling hanger 1 to be reduced.

[0042] In the above embodiment, the first vibration-isolating part 4 is made of a vibration-isolating plate that contacts the member that constitutes the floor side, and therefore the structure blocks vibration propagation from the floor side to the ceiling hanger 1 itself. The first vibration-isolating part 4 is configured to sandwich the flange part of the H-shaped steel that constitutes the floor side from above and below, and therefore the floor-side fixing part 2 can be fixed to the floor side of the upper floor via the first vibration-isolating part 4. The first vibration-isolating part is not limited to a structure in which it contacts the member that constitutes the floor side. For example, a cylindrical vibration-isolating rubber may be provided as the first vibration-isolating part between the upper wing nut 33 and the second horizontal part 213, and vibrations transmitted through the second horizontal part 213 may be attenuated by the vibration-isolating rubber and propagated to the hanging bolt 31. A non-vibration-isolating plate material attached to the vibration-isolating plate may be configured to contact the member that constitutes the floor side.

[0043] In the above embodiment, the base material support part 34 is fixed to the hanging bolt 31 by the head of the hanging bolt 31 and the nut 35, but the fixing is not limited to this. For example, the hanging bolt 31 may be a double-ended bolt without a head, and a through hole for passing the double-ended bolt through may be formed in the two plate parts 341a and 341b, and the second vibration-proof part 341 may be sandwiched between a nut screwed to the lower side of the double-ended bolt and the nut 35. Alternatively, the lower end of the double-ended bolt may be welded and fixed to the upper plate part 341a. In the above embodiment, the second vibration-proof part 341 is a leaf spring having two upper and lower plate parts 341a and 341b whose interval changes in the vertical direction, but it may be made of three or more upper and lower plate parts whose interval changes in the vertical direction.

[0044] Although the embodiment of the present invention has been described above with reference to the drawings, the present invention is not limited to the illustrated embodiment. Various modifications and variations can be made to the illustrated embodiment within the same scope as the present invention or within an equivalent scope. [Explanation of symbols]

[0045] 1: Ceiling hanger 2: Floor side fixing part 3: Ceiling support 4: First vibration isolation section 7: Ceiling support (ceiling underlayment) 9: Base material support member 9A: Base material receiving member 21: Support main body part 22: Slide clamp plate 23: Fixed operating member 31: Hanging bolt 32: Lower nut 33: Upper wing nut 34: Base material support part 35: Nut 36: Bis 211: 1st horizontal part 212: Vertical section 212a: Guide hole 212b: rivet pin 213: 2nd horizontal part 221:Horizontal part 221a : Nut 222: Vertical section 341: Second vibration isolation section 341a: Plate part 341b: Plate part 501: Beam 502: Floor slab 503: No-en 504: No-bori 505: Weight 506: Vibration generator

Claims

1. A floor side fixing part that is fixed to the floor side of the upper floor; A ceiling support portion that supports a lower floor ceiling structure; A first vibration isolation part provided on the floor side fixed part to suppress vibration propagation from the floor side; A second vibration isolation section, the vibration isolation characteristics of which are different from those of the first vibration isolation section and which is provided on the ceiling support section to suppress vibration propagation to the lower floor ceiling structure; Equipped with A ceiling hanger characterized in that the first vibration-isolating portion is made of a vibration-isolating plate that contacts a member that constitutes the floor side.

2. A floor side fixing part that is fixed to the floor side of the upper floor; A ceiling support portion that supports a lower floor ceiling structure; A first vibration isolation part provided on the floor side fixed part to suppress vibration propagation from the floor side; A second vibration isolation section, the vibration isolation characteristics of which are different from those of the first vibration isolation section and which is provided on the ceiling support section to suppress vibration propagation to the lower floor ceiling structure; Equipped with A ceiling suspension device characterized in that the first vibration isolation portion is arranged so as to sandwich the horizontally arranged plate-shaped portion that constitutes the floor side from above and below.

3. A floor side fixing part that is fixed to the floor side of the upper floor; A ceiling support portion that supports a lower floor ceiling structure; A first vibration isolation part provided on the floor side fixed part to suppress vibration propagation from the floor side; A second vibration isolation section having vibration isolation characteristics different from those of the first vibration isolation section and provided on the ceiling support section to suppress vibration propagation to the lower floor ceiling structure; Equipped with A ceiling suspension device characterized in that the second vibration-isolating portion is made of a curved plate having two or more plate portions whose spacing varies in the vertical direction.

4. A ceiling hanger as described in any one of claims 1 to 3, characterized in that the second vibration-isolating section is provided in a base material support section to which a base material receiving member that supports a ceiling base material is fixed.

5. 4. The ceiling hanger according to claim 1, wherein the second vibration-isolating portion is provided in a base material receiving member that supports the ceiling base material.

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