Vibration proof hoisting tool and ceiling structure provided with the same

Abstract

To provide a vibration proof hoisting tool that can improve a vibration proof effect, and a ceiling structure provided with the same.SOLUTION: A vibration proof hoisting tool 1 comprises a part 3 to be mounted that is mounted to a structural skeleton 100, a partition part 4 to partition a predefined storage chamber 40, a hoisting bolt 7 that is mounted to be able to be relatively displaced against the part 3 to be mounted and where a ceiling substrate 200 is mounted, an elastic member 6 that is provided over the part 3 to be mounted and the hoisting bolt 7 so as to be elastically deformed in response to a relative displacement of the hoisting bolt 7 against the part 3 to be mounted, and a moving member 81 that is provided within the storage chamber 40 so as to be relatively displaced within a predefined moving range against the partition part 4 and to restrict the movement beyond the moving range by collision with the partition part 4.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to an anti-vibration hanger and a ceiling structure including the same.

Background Art

[0002] Anti-vibration hangers for attaching ceiling substrates to building structural frameworks have been conventionally known. For example, Patent Document 1 discloses an anti-vibration hanger capable of suppressing the transmission of vibrations caused by impact sounds or the like from upper floors to lower floors in a building.

[0003] This anti-vibration hanger includes a main body portion detachable from a beam member, a suspension bolt penetrating through a part of the main body portion, and a spring body that absorbs vibrations acting on the suspension bolt, and a ceiling substrate is attached to the suspension bolt.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, in the anti-vibration hanger disclosed in Patent Document 1, the anti-vibration effect for vibrations of a specific frequency may be low, and there is room for improvement in this regard.

[0006] An object of the present invention is to provide an anti-vibration hanger capable of improving the anti-vibration effect and a ceiling structure including the same.

Means for Solving the Problems

[0007] As a result of intensive studies to solve the above problems, the inventors of the present invention have found that the cause of the low vibration isolation effect of vibrations at a specific frequency is the resonance of the structural body itself to which the vibration isolation hanger is attached, and have shifted the resonance frequency of the structural body to the lower frequency side, and further, by adopting a structure of a vibration isolation hanger capable of reducing vibrations, it has been found that the vibration isolation effect can be improved, leading to the completion of the present invention. That is, the present invention relates to the following inventions.

[0008] The vibration isolation hanger according to the first aspect of the present invention is a vibration isolation hanger for attaching the ceiling base to the structural body so that the ceiling base is suspended below the structural body. This vibration isolation hanger includes a hanger body having a mounted portion to be mounted on the structural body, a hanging member that is attached to the hanger body so as to be relatively displaceable with respect to the mounted portion and to which the ceiling base is attached so that the ceiling base is suspended below the mounted portion, an elastic member provided on the hanger body across the mounted portion and the hanging member so as to elastically deform in response to the relative displacement of the hanging member with respect to the mounted portion, a partitioning portion provided on the hanger body or the hanging member that partitions a predetermined accommodation chamber, and a moving member provided in the accommodation chamber so as to be relatively displaceable within a predetermined movement range with respect to the partitioning portion and the movement beyond the movement range being restricted by a collision with the partitioning portion.

[0009] According to the first aspect, a so-called impact damper is constituted by the partitioning portion and the moving member provided in the accommodation chamber of the partitioning portion. Since the impact damper can attenuate the vibration of the vibration isolation hanger itself, the vibration isolation effect of the vibration isolation hanger can be improved. Further, when it was found that the cause of the low vibration isolation effect of vibrations at a specific frequency is the resonance of the structural body itself, by providing the moving member with respect to the partitioning portion, a load corresponding to the mass of the moving member can be applied to the structural body via the mounted portion, and the resonance frequency of the structural body can be shifted to the lower frequency side. Thereby, vibrations at a specific frequency can be effectively suppressed by the elastic member.

[0010] The anti-vibration suspension device according to the second aspect is the anti-vibration suspension device of the first aspect, and is provided in the accommodation chamber so as to be relatively displaceable within a predetermined separate movement range with respect to the partition portion and the moving member, and movement beyond the separate movement range is restricted by collision with the partition portion or the moving member. The anti-vibration suspension device further includes a separate moving member having a mass different from that of the moving member.

[0011] According to the second aspect, since the moving member and the separate moving member have different masses, the moving member and the separate moving member can be operated separately with respect to vibrations of two different frequencies. Thereby, vibrations in a wider frequency band can be reduced.

[0012] The anti-vibration suspension device according to the third aspect is the anti-vibration suspension device of the first or second aspect, wherein the partition portion and the moving member are provided at positions on the opposite side of the attachment member with respect to the suspension member in the suspension device main body.

[0013] According to the third aspect, since the moving member is disposed at a position farther from the structural body, the resonance frequency of the structural body can be more effectively shifted to the lower frequency side. Thereby, the anti-vibration effect of the anti-vibration suspension device can be effectively improved.

[0014] The anti-vibration suspension device according to the fourth aspect is the anti-vibration suspension device of the first to third aspects, wherein the elastic member is formed of a leaf spring, and the anti-vibration suspension device further includes a support portion that is fixed to the suspension device main body and supports the leaf spring in a state of point contact with the lower surface of the leaf spring from below.

[0015] According to the fourth aspect, by adopting a leaf spring as the elastic member, the load-bearing capacity is improved in the same shape as compared with the case of using a rubber material, so that cost reduction can be achieved by reducing the installation locations of the anti-vibration suspension devices. On the other hand, when a leaf spring is adopted, vibration transmission from the attachment portion to the leaf spring becomes a problem. However, by supporting the leaf spring in a point contact state at the support portion, vibration transmission from the attachment portion to the leaf spring can be suppressed.

[0016] The ceiling structure according to the fifth aspect includes a structural body having a web extending in the vertical direction and a flange extending from the lower end portion of the web in a direction orthogonal to the web, a vibration isolation hanger as described above attached to the structural body, and a ceiling base attached to the vibration isolation hanger. The attached portion is attached to the flange of the structural body, and the partitioning portion and the moving member are provided at a position horizontally separated from the web in the vibration isolation hanger.

[0017] According to the fifth aspect, the vibration of the flange with the web as a fulcrum can be effectively suppressed by the vibration isolation hanger.

[0018] The ceiling structure according to the sixth aspect is the ceiling structure according to the fifth aspect, wherein the hanger body has a shape extending from the attached portion along the extending direction in which the flange extends from the web, and the partitioning portion and the moving member are provided at the tip end portion in the extending direction in the hanger body.

[0019] According to the sixth aspect, the partitioning portion and the moving member can be provided at positions more susceptible to the influence of the vibration of the flange to effectively suppress the vibration.

Advantages of the Invention

[0020] As described above, according to the present invention, it is possible to provide a vibration isolation hanger capable of improving the vibration isolation effect and a ceiling structure including the same.

Brief Description of the Drawings

[0021]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Embodiments for Carrying Out the Invention

[0022] Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings. FIG. 1 is a cross-sectional view showing a main part of a ceiling structure to which the anti-vibration suspension tool 1 is applied.

[0023] The anti-vibration suspension tool 1 is a member for attaching the ceiling base 200 to the structural body 100 so that the ceiling base 200 is suspended below the structural body 100 in the ceiling structure of a building. The anti-vibration suspension tool 1 has a function of suppressing the transmission of vibrations caused by impact sounds and the like from the upper floor to the lower floor in a building. Prior to the description of the anti-vibration suspension tool 1, the ceiling structure to which the anti-vibration suspension tool 1 is applied will be described.

[0024] As shown in FIG. 1, the ceiling structure of a building is a structure in which the ceiling base 200 of the lower floor is suspended by the anti-vibration suspension tool 1 from the structural body 100 of the upper floor of the building.

[0025] The structural body 100 has the anti-vibration suspension tool 1 attached thereto. The structural body 100 includes a plurality of floor beams 101 and a plurality of floor panels 102 laid on these floor beams 101. The floor beam 101 is constituted by, for example, a steel H-shaped steel having an H-shaped cross-sectional shape. Specifically, the floor beam 101 has an upper flange 101a and a lower flange 101b that are arranged apart from each other in the vertical direction, and a web 101c that extends in the vertical direction and connects the respective flanges 101a, 101b to each other. The upper flange 101a extends in a direction orthogonal to the web 101c from the upper end portion of the web 101c. Similarly, the lower flange 101b extends in a direction orthogonal to the web 101c from the lower end portion of the web 101c.

[0026] The floor panel 102 is composed of, for example, a cement board having a hollow portion. Further, the floor panel 102 is fixed to the floor beam 101 by a fixing fitting 105 in a state of being placed on the upper flange 101a of the floor beam 101. Furthermore, on the floor panel 102, floor finishing materials 104 such as particle board 103 and flooring are sequentially laid.

[0027] The ceiling base 200 is attached to the vibration isolation hanger 1. The ceiling base 200 includes a plurality of soffit supports 201 that are suspended from the floor beam 101 via a plurality of vibration isolation hangers 1 and arranged substantially parallel to each other, and a plurality of soffits 202 that extend in a direction substantially orthogonal to the soffit supports 201 and are attached to the lower side of the soffit supports 201 and arranged substantially parallel to each other, and a ceiling board 203 made of gypsum board or the like screwed to the lower surface of the soffit 202. Note that a sound absorption material is appropriately provided on the upper side of the ceiling base 200.

[0028] The soffit support 201 is composed of, for example, a channel steel having a substantially U-shaped cross-sectional shape with an open portion facing sideways. Specifically, the soffit support 201 has an upper flange 201a and a lower flange 201b that are arranged apart from each other in the vertical direction, and a web 201c that connects one end portion along the longitudinal direction of each flange 201a, 201b.

[0029] The soffit 202 is composed of a steel cylindrical material having a substantially rectangular cross-sectional shape. The soffit 202 is attached to the lower surface of the soffit support 201 via a plurality of connectors 204 so as to straddle a plurality of soffit supports 201.

[0030] Next, the vibration isolation hanger 1 will be described in detail with reference to FIGS. 2 to 5 in addition to FIG. 1. FIG. 2 is a cross-sectional view of the vibration isolation hanger 1, and FIGS. 3 to 5 are perspective views of the vibration isolation hanger 1.

[0031] As described above, the vibration isolation hanger 1 is a member for attaching the ceiling base 200 to the structural body 100 so that the ceiling base 200 is suspended below the structural body 100 in the ceiling structure of a building. The vibration isolation hanger 1 includes a hanger main body 2, an elastic member 6, a suspension bolt 7, a moving member 81, and a separate moving member 82.

[0032] The hanger main body 2 constitutes the main body portion of the vibration isolation hanger 1 and is made of a metal material such as steel. The hanger main body 2 has a pair of side portions 21 and a bottom portion 22 that connects the lower ends of these side portions 21, and is formed in a substantially U-shaped with the open portion facing upward. At one longitudinal end of the pair of side portions 21, a protruding portion 211 protruding upward is formed. The hanger main body 2 has a mounting portion 3 located at one longitudinal end of the pair of side portions 21 where the protruding portion 211 is formed, a partitioning portion 4 located at the other longitudinal end, and a mounting portion 5 located between the mounting portion 3 and the partitioning portion 4.

[0033] In the hanger main body 2, the mounting portion 3 is a portion to be attached to the floor beam 101 of the structural body 100. The mounting portion 3 has a fitting groove 31 formed in the protruding portion 211 of the pair of side portions 21 and a fixing bolt 32 screwed into the bottom portion 22. The mounting portion 3 is attached to the floor beam 101 by pressing the tip of the fixing bolt 32 against the lower surface of the lower flange 101b with the lower flange 101b of the floor beam 101 fitted into the fitting groove 31. In the state where the mounting portion 3 is attached to the lower flange 101b of the floor beam 101, the hanger main body 2 has a shape extending from the mounting portion 3 along the extending direction in which the lower flange 101b extends from the web 101c of the floor beam 101. In this case, the longitudinal direction of the hanger main body 2 coincides with the extending direction in which the lower flange 101b extends from the web 101c in the floor beam 101.

[0034] In the lifting tool body 2, the partitioning portion 4 is a portion that partitions a predetermined accommodation chamber 40 for accommodating the later-described moving member 81 and another moving member 82. The partitioning portion 4 includes an end-side partitioning piece 41 and an other-end-side partitioning piece 42 provided so as to protrude upward from the bottom surface portion 22, and an upper partitioning plate 43 provided across between a pair of side surface portions 21 so as to face the bottom surface portion 22 from above. In the longitudinal direction of the lifting tool body 2, the end-side partitioning piece 41 defines one end position of the accommodation chamber 40, and the other-end-side partitioning piece 42 defines the other end position of the accommodation chamber 40. The upper partitioning plate 43 has a regulating portion 431 and a pair of engaging portions 432 disposed on both sides sandwiching the regulating portion 431, and is a plate body that defines the upper position of the accommodation chamber 40. The upper partitioning plate 43 is provided across between the pair of side surface portions 21 by engaging the pair of engaging portions 432 with engaging holes 40a formed in the pair of side surface portions 21 in a state where the regulating portion 431 is disposed so as to face the bottom surface portion 22 from above. The partitioning portion 4 partitions a space surrounded by the pair of side surface portions 21, the bottom surface portion 22, the end-side partitioning piece 41, the other-end-side partitioning piece 42, and the upper partitioning plate 43 as the accommodation chamber 40. Note that the partitioning portion 4 is not limited to being provided on the lifting tool body 2, and may be provided on the later-described suspension bolt 7. Specifically, the lifting tool body 2 is composed of a mounted portion 3 and a mounting portion 5, and may be provided on the suspension bolt 7 through a through hole (not shown) provided in the bottom surface portion 22 in a range that does not constitute the bottom surface of the accommodation chamber 40. In such a case, the partitioning portion 4 can be provided so as to be located on the axis of the suspension bolt 7, and of course, can also be provided at a position away from the axis of the suspension bolt 7.

[0035] In the suspension tool body 2, the mounting portion 5 is a portion where the elastic member 6 and the suspension bolt 7 described later are mounted. The mounting portion 5 has a through hole 51 formed in the bottom surface portion 22 and penetrating vertically, and a plurality of support portions 52 fixed to the bottom surface portion 22 so as to protrude upward from the bottom surface portion 22. The through hole 51 is formed to have a size through which the suspension bolt 7 can be inserted. The plurality of support portions 52 are fixed to the bottom surface portion 22 so as to surround the through hole 51 and have a tapered shape, for example, a curved surface shape, extending upward from the bottom surface portion 22. In the present embodiment, at least three, specifically four, support portions 52 are fixed to the bottom surface portion 22 so as to surround the through hole 51. The plurality of support portions 52 support the elastic member 6 from below in a state of being in point contact with the lower surface portion of the elastic member 6. In the mounting portion 5, the suspension bolt 7 is mounted in a state of being inserted through the through hole 51, and the elastic member 6 in a state of being penetrated by the suspension bolt 7 is mounted in a state of being in point contact with the plurality of support portions 52.

[0036] The suspension bolt 7 is attached to the mounting portion 5 so as to be relatively displaceable with respect to the attached portion 3, and is a suspension member to which the edge support 201 is attached so that the ceiling base 200 is suspended below the attached portion 3. The suspension bolt 7 is attached to the mounting portion 5 so as to penetrate the elastic member 6 and the bottom surface portion 22 in the vertical direction with a caulking nut 71 screwed to the upper end portion thereof. The caulking nut 71 abuts against the upper surface portion of the elastic member 6 in a state of being mounted on the mounting portion 5.

[0037] The lower end portion of the suspension bolt 7 penetrates the upper flange 201a of the edge support 201 in the vertical direction. A pair of upper and lower nuts 72 are screwed to the lower end portion of the suspension bolt 7. The edge support 201 is attached to the lower end portion of the suspension bolt 7 by sandwiching the upper flange 201a of the edge support 201 vertically with these nuts 72.

[0038] The elastic member 6 is mounted on the mounting portion 5 across the attached portion 3 and the suspension bolt 7 so as to elastically deform in accordance with the relative displacement of the suspension bolt 7 with respect to the attached portion 3 in order to suppress the vibration transmission from the attached portion 3 to the ceiling base 200. The elastic member 6 is mounted on the mounting portion 5 while the suspension bolt 7 passes therethrough and is supported from below by a plurality of support portions 52. The material of the elastic member 6 is not particularly limited as long as it can be elastically deformed, and can be realized by, for example, a rubber body composed of a rubber material, a leaf spring composed of a metal material such as a steel material, or the like. In the present embodiment, the elastic member 6 is composed of a leaf spring.

[0039] The elastic member 6 composed of a leaf spring has a substantially S-shaped cross-sectional shape, and a through-hole 61 for the suspension bolt 7 to pass through is formed. In a state where the elastic member 6 of the leaf spring is mounted on the mounting portion 5, a caulking nut 71 screwed to the upper end portion of the suspension bolt 7 inserted through the through-hole 61 abuts on the upper surface portion of the elastic member 6 from above, and the lower surface portion of the elastic member 6 is fixed to the bottom surface portion 22 by a rivet 62 in a state of being in point contact with a plurality of support portions 52.

[0040] By adopting a leaf spring as the elastic member 6, the load resistance with respect to the size of the elastic member is improved as compared with the case of using a rubber material, so that cost reduction can be achieved by reducing the installation locations of the vibration isolation hanger 1. On the other hand, although vibration transmission from the attached portion 3 to the elastic member 6 becomes a problem by adopting a leaf spring, vibration transmission from the attached portion 3 to the elastic member 6 can be suppressed by supporting the elastic member 6 in a point contact state at a plurality of support portions 52.

[0041] The moving member 81 is a weight made of a metallic material such as a steel material and has a predetermined mass. The moving member 81 is provided in the accommodation chamber 40 so as to be relatively displaceable within a predetermined movement range with respect to the partitioning portion 4 and the movement beyond the movement range is restricted by a collision with the partitioning portion 4. The moving member 81 is movably arranged on the bottom surface portion 22 in the accommodation chamber 40 of the partitioning portion 4 in a state where the upward protrusion from the accommodation chamber 40 is restricted by the restricting portion 431 of the upper partition plate 43, and the movement beyond the movement range is restricted by a collision with the pair of side surface portions 21, the one-end-side partitioning piece 41, and the other-end-side partitioning piece 42.

[0042] In the vibration isolator 1, a so-called impact damper is constituted by the partitioning portion 4 of the hanger body 2 and the moving member 81 provided in the accommodation chamber 40 of the partitioning portion 4. Since the vibration of the vibration isolator 1 itself can be attenuated by the impact damper, the vibration isolation effect of the vibration isolator 1 can be improved. Thereby, the performance of blocking the light floor impact sound by the vibration isolator 1 can be improved. Further, when it was investigated that the cause of the low vibration isolation effect of vibration at a specific frequency (for example, 250 Hz) in the conventional vibration isolator was the resonance of the structural frame 100 itself, by providing the moving member 81 with respect to the partitioning portion 4, a load corresponding to the mass of the moving member 81 can be applied to the structural frame 100 via the attached portion 3, and the resonance frequency of the structural frame 100 can be shifted to the lower frequency side. Thereby, the vibration at a specific frequency can be effectively suppressed by the elastic member 6.

[0043] In addition, in the present embodiment, a separate moving member 82 having a mass different from that of the moving member 81 is provided independently of the moving member 81 in the accommodation chamber 40 of the partitioning portion 4. The separate moving member 82 is displaceable relative to the partitioning portion 4 and the moving member 81 within a predetermined separate moving range, and is provided in the accommodation chamber 40 such that movement beyond the separate moving range is restricted by collision with the partitioning portion 4 or the moving member 81. The separate moving member 82 is disposed on the moving member 81 in the accommodation chamber 40 of the partitioning portion 4 in a state where the regulating portion 431 of the upper partition plate 43 restricts the upward protrusion from the accommodation chamber 40, and is movably arranged independently of the moving member 81. The movement beyond the separate moving range is restricted by collision with the pair of side surface portions 21, the one-end side partitioning piece 41, and the other-end side partitioning piece 42. By attaching a cushioning material 83 to the upper surface of the moving member 81, the generated sound when the moving member 81 and the separate moving member 82 collide with each other can be suppressed.

[0044] Since the moving member 81 and the separate moving member 82 have different masses, the moving member 81 and the separate moving member 82 can be operated separately with respect to vibrations of two different frequencies. Thereby, vibrations in a wider frequency band can be reduced.

[0045] In addition, in the vibration isolation hanger 1, the partitioning portion 4, the moving member 81 and the separate moving member 82 in the accommodation chamber 40 of the partitioning portion 4 are provided at a position on the opposite side of the mounting portion 3 across the suspension bolt 7 in the hanger body 2. In this case, since the moving member 81 and the separate moving member 82 are arranged at a position farther from the structural housing 100 to which the mounting portion 3 is attached, the resonance frequency of the structural housing 100 can be more effectively shifted to the low frequency side. Thereby, the vibration isolation effect of the vibration isolation hanger 1 can be effectively improved.

[0046] Also, when the anti-vibration hanger 1 is attached to the lower flange 101b of the floor beam 101 by the attached part 3, the partition part 4, the moving member 81 and the other moving member 82 in the accommodation chamber 40 of the partition part 4 are provided at the position farthest from the web 101c of the floor beam 101 in the horizontal direction in the anti-vibration hanger 1. Thereby, the vibration of the lower flange 101b with the web 101c as a fulcrum can be effectively suppressed by the anti-vibration hanger 1.

[0047] Also, the partition part 4, the moving member 81 and the other moving member 82 in the accommodation chamber 40 of the partition part 4 are provided at the other end in the longitudinal direction of the hanger body 2 that coincides with the extending direction in which the lower flange 101b extends from the web 101c of the floor beam 101. Thereby, the partition part 4, the moving member 81 and the other moving member 82 can be provided at a position more easily affected by the vibration of the lower flange 101b, and the vibration can be effectively suppressed.

Explanation of Reference Numerals

[0048] 1 Anti-vibration hanger 2 Hanger body 3 Attached part 4 Partition part 40 Accommodation chamber 5 Mounting part 6 Elastic member 7 Suspension bolt (suspension member) 81 Moving member 82 Other moving member 100 Structural frame 200 Ceiling base

Claims

1. An anti-vibration suspension tool for attaching a ceiling base to a structural body such that the ceiling base is suspended below the structural body, comprising: a suspension tool body having a portion to be attached to the structural body; a suspension member attached to the suspension tool body so as to be relatively displaceable with respect to the portion to be attached and having the ceiling base attached thereto so that the ceiling base is suspended below the portion to be attached; an elastic member provided on the suspension tool body across the portion to be attached and the suspension member so as to elastically deform in response to relative displacement of the suspension member with respect to the portion to be attached; a partitioning portion provided on the suspension tool body or the suspension member and partitioning a predetermined accommodation chamber; a moving member provided in the accommodation chamber and relatively displaceable within a predetermined moving range with respect to the partitioning portion, and the movement beyond the moving range being restricted by collision with the partitioning portion.

2. The anti-vibration suspension tool according to claim 1, further comprising a different moving member provided in the accommodation chamber, relatively displaceable within a predetermined different moving range with respect to the partitioning portion and the moving member, and the movement beyond the different moving range being restricted by collision with the partitioning portion or the moving member, and having a mass different from that of the moving member.

3. The anti-vibration suspension tool according to claim 1, wherein the partitioning portion and the moving member are provided at positions on the suspension tool body on the side opposite to the portion to be attached with the suspension member interposed therebetween.

4. The elastic member is formed of a leaf spring, and the anti-vibration suspension tool according to claim 1 further comprising a support portion fixed to the suspension tool body and supporting the leaf spring in a state of point contact with the lower surface of the leaf spring from below.

5. A ceiling structure, comprising: a structural body having a web extending in the vertical direction and a flange extending from the lower end portion of the web in a direction orthogonal to the web; the anti-vibration suspension tool according to any one of claims 1 to 4 attached to the structural body; a ceiling base attached to the anti-vibration suspension tool, wherein the portion to be attached is attached to the flange of the structural body, and the partitioning portion and the moving member are provided at positions horizontally separated from the web in the anti-vibration suspension tool.

6. The suspension tool body has a shape extending from the portion to be attached along the extending direction in which the flange extends from the web. The partition portion and the moving member are provided at the tip portion in the extending direction in the hanging tool main body, and the ceiling structure according to claim 5.

Images