JP7737699B2 - Anti-vibration hanging devices and ceiling vibration-proof structures - Google Patents

Description

The present invention relates to vibration-isolating hangers and ceiling vibration-isolating structures.

An anti-vibration sling is a structure that includes an elastic body that allows appropriate elastic deformation between a member that engages with a beam and a member that is attached to the ceiling, base material, or frames that support both. Some types use rubber as the elastic body (see Patent Document 1), while others use spring bodies such as leaf springs (see Patent Document 2). These anti-vibration slings are designed solely to prevent vibrations caused by impact noise from the floor above from being transmitted to the ceiling, and are designed so that the transmitted vibrations are absorbed by the elastic body.

Japanese Utility Model Application Laid-Open Publication No. 5-57145 Japanese Patent Application Laid-Open No. 2000-87497

The above-mentioned vibration-isolating slings basically achieve the same effect, except for the difference between using rubber or springs as the elastic body, and their effective characteristics do not differ significantly. However, as mentioned above, the elastic body is placed between the member that engages with the beam and the member that supports the ceiling, etc., so when supported by the vibration-isolating sling, the ceiling, etc. is supported via the elastic body and is already under the action of an elastic force.

In this way, ceilings and other structures suspended via elastic bodies are more susceptible to shaking than structures suspended via non-elastic materials, and can easily vibrate due to vibrations other than those transmitted from above (such as noise from daily life in one's own room). Furthermore, because the elastic body of vibration-isolating suspension devices deforms due to the weight of the ceiling or other structure, the amount of deformation of the elastic body due to the weight of the ceiling or other structure must be taken into consideration beforehand when installing the ceiling or other structure to be supported.

The present invention was made in consideration of the above points, and its purpose is to provide an anti-vibration sling that normally maintains a stable support state as a non-elastic member, while providing vibration-damping effects in situations where the transmission of impact noise, etc. needs to be suppressed, and to provide a ceiling vibration-damping structure that uses this anti-vibration sling.

The present invention relates to a vibration-isolating sling that is used to suspend a ceiling, a base material, or both of these from frames that support the ceiling, a base material, or both while providing vibration-isolating performance. It comprises a main body that can be attached to and detached from a beam, a suspension bolt that is inserted through a portion of the main body, and a spring body that is attached to the main body and supports the suspension bolt while absorbing vibrations acting on the suspension bolt. The spring body is a leaf spring that has at least a bottom surface and an upper surface that are approximately parallel to each other and has a connecting portion in the middle, and is integrated with an approximately S-shaped cross section. The main body has a bottom surface for attaching the bottom surface of the leaf spring, and a spring body that is attached to and detached from the beam. The leaf spring has an insertion portion through which the hanging bolt passes at an appropriate location in the bottom of the main body, and a locking portion that locks onto the top surface of the leaf spring. The leaf spring has through holes in all of the top surface, bottom surface, and connecting portion to allow the hanging bolt to pass through, and the top surface is provided with a female thread for connecting to the hanging bolt. The leaf spring is attached in a state where it is appropriately compressed between the bottom surface of the main body and the locking portion. The hanging bolt is inserted through the insertion portion provided on the bottom of the main body and the through portion of the leaf spring, and is supported by the female thread.

With the vibration-isolating sling configured as described above, the suspension bolts that suspend the ceiling, base material, or frames supporting both are supported by female threads on the top surface of the leaf spring (spring body), and the entire leaf spring undergoes compressive deformation, providing vibration-isolating effects. This leaf spring is pre-compressed appropriately (pre-compressed) between the bottom of the main body and the locking portion, and is already deformed in accordance with this pre-compression. By pre-compressing the leaf spring, deformation of the leaf spring is suppressed when the ceiling, etc. (ceiling, base material, and frames) are supported by the suspension bolts. In other words, although the weight of the ceiling, etc., acts on the leaf spring via the suspension bolts, the leaf spring does not compress and deform at the limit of the pre-compression applied, providing stability similar to that achieved when supported by a non-elastic member.

In the vibration-isolating slings of each of the above configurations, the main body can be configured to include an insertion portion that allows the beam to be inserted, and a threaded portion for clamping the beam inserted into the insertion portion. This configuration allows for engagement with various beams (components of different dimensions).

In addition, in the vibration-damping hangers of each of the above configurations, the female thread portion provided on the top surface of the leaf spring can be formed by a pop nut that is attached to a through hole in the top surface. This means that when the spring body is made of a leaf spring, it is possible to form a female thread portion even in a thin-walled member, and the load acting on the hanging bolt can be sufficiently transmitted to the spring body.

On the other hand, the present invention, which relates to a ceiling vibration isolation structure, is a ceiling vibration isolation structure that uses any of the vibration isolation hangers of the configurations described above, characterized in that the main body is attached to the beam, the hanging bolt is threaded into a female thread provided on the upper surface of the leaf spring installed on the main body, the leaf spring is pre-compressed between the bottom surface of the main body and the locking portion, the frames are supported below the hanging bolt, and the ceiling or the base material, or both, are supported by the frames.

With the ceiling vibration-damping structure configured as described above, the main body is fixed in a state where it is engaged with the beams, and frames and ceilings are supported by suspension bolts suspended from this fixed main body. At this time, a compressive load is applied to the leaf springs attached to the main body by the suspension bolts, and the leaf springs elastically deform in response to this compressive load, thereby achieving a vibration-damping effect. At this time, a load equivalent to the weight of the frames and ceilings is applied to the leaf springs by pre-compression, so the leaf springs do not deform when supporting the frames and ceilings. However, when a load exceeding this, i.e., an external load due to vibration or the like, is applied, the leaf springs undergo compressive deformation, thereby achieving a vibration-damping effect.

With the vibration-damping sling of the present invention, by pre-compressing the leaf spring, when it is simply supporting a frame, ceiling, etc. (normally), the leaf spring is not in a state where it can elastically deform, and therefore acts as a stable supporting member as a non-elastic member. Furthermore, in situations where the transmission of impact noise, etc. needs to be suppressed, the leaf spring can deform beyond the pre-compressed state, thereby providing vibration-damping effects.

On the other hand, with the ceiling vibration isolation structure of the present invention, the ceiling is normally supported in a stable state, and when the transmission of impact noise, etc. needs to be suppressed, vibration can be isolated by the elastic deformation of the leaf spring. It is also expected that the degree of load acting on the suspension bolts under normal conditions will vary depending on the design of the ceiling structure, but the adjustment function of the pressure adjustment member makes it possible to adjust the pre-compression state as appropriate.

FIG. 1 is an explanatory diagram showing an outline of a ceiling vibration isolation structure. FIG. 1 is an exploded perspective view showing an embodiment of a vibration-isolating hanger. FIG. 3 is a longitudinal cross-sectional view of FIG. 2 . FIG. 1 is a perspective view showing an embodiment of a vibration-isolating hanger. 4A is a cross-sectional view taken along line VA-VA in FIG. 4, and FIG. 4B is a cross-sectional view taken along line VB-VB in FIG. FIG. 10 is an explanatory diagram showing the state of an embodiment of the vibration-isolating sling device during operation. FIG. 10 is an explanatory diagram showing the state of an embodiment of the vibration-isolating sling device during operation.

Embodiments of the present invention will be described below with reference to the drawings. Regarding the embodiments of the present invention, we will first provide an overview of the ceiling vibration isolation structure, and then explain the embodiments relating to the vibration isolation sling.

<Ceiling vibration isolation structure>
Figure 1 shows an outline of a ceiling vibration-isolation structure. As shown in this figure, a vibration-isolation sling 1 is attached to a beam A, and the figure illustrates an example in which it is attached to the flange portion of an H-shaped steel. This vibration-isolation sling 1 includes a leaf spring 2. A suspension bolt 3 inserted into a main body 10 of the vibration-isolation sling 1 is connected near its upper end to the top of the leaf spring 2 to support the suspension bolt 3. A load acting on the suspension bolt 3 acts from above on the leaf spring 2 in a state of compressing the leaf spring 2, and vibration is isolated by utilizing the compressive deformation (elastic deformation) of the leaf spring 2.

A hanger B is attached near the lower end of the hanging bolt 3, which supports a siding support (frame) C, which in turn supports a siding (frame) E via a clip D attached to the siding support C. This siding E is then used to install a surface material (ceiling or base material, or both (hereinafter sometimes referred to as the ceiling, etc.)) F.

Vibrations caused by impact noise and the like are transmitted to the ceiling, etc. F, via various transmission paths. When such vibrations are transmitted, the leaf springs 2 elastically deform to absorb the vibrations. Since impact noise is known to propagate through the ceiling space (ceiling recess), ceiling vibrations can occur even when the beams A are firmly installed. Furthermore, a suspended ceiling can also vibrate due to earthquakes, etc. For this reason, vibration-isolating hangers 1 are interposed between the beams A and the hanging bolts 3 to absorb vibrations while supporting the weight of the frames C, E and the ceiling, etc. F.

Note that the illustration shows only part of a ceiling vibration-isolation structure, with multiple long beams A arranged parallel to one another. Similarly, multiple joist supports C and joist E are also installed. Therefore, there are multiple locations where joist supports C are supported using vibration-isolation suspenders 1, and vibration-isolation suspenders 1 are used in all of these locations. Furthermore, the illustrated ceiling vibration-isolation structure is only one example of a ceiling structure that uses vibration-isolation suspenders 1; in some cases, joist E is directly supported near the bottom of the suspension bolts 3 without using hangers B or joist supports C. Furthermore, in some cases, either a base material or a ceiling is attached to the joist E, and in other cases, a base material is attached and then decorative panels are laminated on top of it as the ceiling material.

In this way, when various frames C, E and ceilings F are supported, vibrations generated in the ceilings F are absorbed by the leaf springs 2. The vibration-isolating sling 1 used here has pre-compressed leaf springs 2, as described below. Pre-compression involves compressively deforming the leaf springs in the direction in which a compressive load is applied. When a load within the range corresponding to the pre-compression load acts on the leaf spring, elastic deformation due to that load is suppressed. In other words, even when the weight of normal frames C, E and ceilings F acts on the leaf springs 2, the leaf springs 2 do not deform, preventing the suspension bolts 3 from descending. As a result, the installation state of the suspension bolts 3 remains unchanged before and after the installation of the frames C, E and ceilings F, eliminating the need for subsequent position adjustments. At the same time, the suspension bolt 3 suspended via the leaf spring 2 is not biased upward by the restoring force of the leaf spring 2, and can be considered as if it were installed using a non-elastic member in the installed state, eliminating the need for unstable installation work due to elastic deformation.

An embodiment of the vibration-isolating sling 1 that enables such pre-compression is described in detail below.

<Embodiments of Vibration-Isolating Hangers>
An outline of an embodiment of the vibration-isolating sling 1 is shown in Figures 2 to 5. Note that the figures show only the elements that make up the vibration-isolating sling 1, with Figure 2 being an exploded perspective view and Figure 3 being a longitudinal cross-sectional view of the exploded state. Also, Figure 4 is a perspective view of the entire assembly, Figure 5(a) is a cross-sectional view taken along line VA-VA in Figure 4, and Figure 5(b) is a cross-sectional view taken along line VB-VB in Figure 4. As shown in Figure 2, this embodiment is generally configured to include a main body 10, a leaf spring 2 attached to this main body 10, and a suspension bolt 3 inserted through the main body 10 and connected to the leaf spring 2.

The main body 10 has a bottom 11 for attaching the leaf spring 2, and an insertion portion 12 is provided on this bottom 11 to allow the suspension bolt 3 to be inserted. The main body 10 also allows a portion of the beam A (such as the flange portion of an H-beam) to be inserted into it, allowing the beam to be clamped and secured. To this end, the main body 10 has an insertion portion 13 formed by cutting out a portion, and a threaded portion 14 that can be attached to the bottom 11. The threaded portion 14 is threaded into a female thread 15 engraved on the bottom 11, and by raising its tip, it can come into contact with part of the beam. The beam is clamped by placing part of the beam between the inner end face of the insertion portion 13 and the tip of the threaded portion 14.

In this embodiment, a leaf spring 2 bent in a roughly S-shape is used as the spring body attached to the bottom 11 of the main body 10. Specifically, the leaf spring (spring body) 2 is composed of three flat areas: a lower surface 21 and an upper surface 22 arranged roughly parallel to each other, and a connecting portion 23 located between them, with curved areas 24 and 25 provided in the middle of the flat areas. By forming the leaf spring 2 in this roughly S-shape, the upper surface 22 and the lower surface 21 can maintain a parallel state when the leaf spring 2 as a whole is compressed and deformed.

The underside 21 of this leaf spring 2 is provided with fixing holes 26, 27, and can be fixed with rivets 28, 29 using rivet holes 16, 17 provided in the bottom 11 of the main body 10. This is to prevent the leaf spring 2 from moving when it undergoes repeated elastic deformation.

The lower surface portion 21, upper surface portion 22, and connecting portion 23 also have coaxial through-holes 41, 42, and 43, which function as insertion portions through which the suspension bolt 3 can be inserted vertically. A female thread is formed by a pop nut 4 installed in the through-hole 41 of the upper surface portion 22. As a result, by threading the suspension bolt 3 into the female thread (pop nut) 4, the suspension bolt 3 is supported on the upper surface of the leaf spring 2. The suspension bolt 3 is supported by threading into the female thread 4 so that the height of the suspension bolt 3 can be adjusted. By rotating the suspension bolt 3 to adjust its vertical position, the height of the aforementioned hanger B can be adjusted, and as a result, the joist E, ceiling F, etc. can be installed at a desired height.

Here, the main body 10 as a whole is configured with a bottom 11 and parallel wall surfaces 11a, 11b formed by bending both sides of the bottom 11, resulting in a roughly U-shaped cross section. In the area where the aforementioned leaf spring 2 is installed, the upper portions of the wall surfaces 11a, 11b are partially bent inward to form locking portions 5a, 5b. These locking portions 5a, 5b protrude inward and are roughly parallel to the bottom 11, so that when the leaf spring 2 is attached to the bottom 11, they can abut against its upper surface 22.

As shown in Figure 3, the distance H1 from the bottom 11 of the main body 10 to the locking portions 5a and 5b is set to the same height as the leaf spring 2 when it is elastically deformed by applying a predetermined compressive force to the leaf spring 2. In other words, the distance H1 from the bottom 11 to the locking portions 5a and 5b is narrower by h1 than the height H2 when the leaf spring 2 is not subjected to a compressive force (H1 = H2 - h1).

Therefore, when the leaf spring 2 is attached to the main body 10, as shown in Figure 4, the leaf spring 2 is already compressed and deformed in accordance with the gap formed between the bottom 11 and the locking portions 5a and 5b. This is called pre-compression, and is a state in which a predetermined compressive force has been applied in advance.

As shown in Figure 5, the lower surface 21 of the pre-compressed leaf spring 2 is riveted to the upper surface of the bottom 11 of the main body 10 by rivets 28, 29, and the entire surface is in close contact with the leaf spring, while the upper surface 22 is in contact with the lower surfaces of the locking portions 5a, 5b over an appropriate area. In this way, the lower surface 21 and upper surface 22 are both maintained in a substantially parallel state while in contact with the bottom 11 and locking portions 5a, 5b, respectively, thereby stabilizing the pre-compressed state described above.

The appropriate pressure for pre-compression at this time can be approximately the same as the total weight W of the components supporting the ceiling, etc. F mentioned above (slightly greater than the total weight). By assuming this level of pressure, when these components are attached, the leaf spring 2 will be installed on the main body 10 without undergoing compressive deformation. Therefore, during installation of the ceiling, etc. F, no compressive load exceeding the weight W will be applied (no vibration will be transmitted), so the pre-compressed leaf spring 2 will not deform, and the position of each component will be stable, just like in installation using non-elastic components.

<Operation mode>
Next, the operation of the above embodiment will be described with reference to Figures 5 to 7. First, because this embodiment is configured as described above, when a ceiling or the like is simply installed, the upper surface 22 of the leaf spring 2 remains locked by the locking portions 5a and 5b, as shown in Figure 5, and the leaf spring 2 does not undergo compressive deformation beyond this state. In this state, under normal conditions (when vibrations are not transmitted), only the weight W of the ceiling or the like acts on the suspension bolt 3, and the leaf spring 2 does not undergo compressive deformation.

In this normal state, when vibrations are transmitted, the ceiling or other object vibrates up and down, and the weight of the ceiling or other object is transmitted to the suspension bolt 3. If the vibrations of the ceiling or other object are directed upward, the load acting on the suspension bolt 3 is reduced, so the deformation of the leaf spring 2 remains within the pre-compressed range, and the suspension bolt 3 does not rise and remains unchanged from its normal state.

In contrast, as shown in Figure 6, when the ceiling or other object vibrates downward, the load (W + α) acting on the suspension bolt 3 increases, causing the suspension bolt 3 to be pulled downward with a strong force. As a result, the upper surface 22 of the leaf spring 2 is pressed downward (in the compression direction) via the female threaded portion (pop nut) 4 on which the suspension bolt 3 is supported.

At this time, the leaf spring 2, with its upper surface 22 pressed downward, contracts as a whole (changing the curvature of the curved region), undergoing compressive deformation. This compressive deformation causes the upper surface 22 of the leaf spring 2 to be released from the engagement by the engagement portions 5a and 5b and to drop below these engagement portions 5a and 5b, creating a gap h2 between them. Even with this compressive deformation, the upper surface 22 remains parallel to the lower surface 21. This is because the leaf spring 2 is configured in a roughly S-shape, allowing it to undergo compressive deformation by changing the curvature of the curved region.

When the downward pressure is released, the compressed and deformed leaf spring 2 rises again while the upper surface 22 moves in parallel, restoring it to its original, normal state where it is locked by the locking portions 5a and 5b. Because the weight (W + α) on the suspension bolt 3 is repeatedly exerted by vibrations from the ceiling, the lifted suspension bolt 3 descends again, compressing and deforming the leaf spring 2 as described above. However, the upward movement of the suspension bolt 3 does not exceed its return to its normal state as described above, and the load in the upward direction is absorbed by the beam material via the main body 10 of the vibration-proof suspension device 1. Therefore, the repeated lifting and lowering of the suspension bolt 3 as described above gradually converges.

Furthermore, because the vibrations that a ceiling or other object experiences are not constant, when the vibration is large, the vertical amplitude of the ceiling or other object (hanging bolt 3) will differ. Therefore, when the ceiling or other object rises or falls more than described above (Figure 6), as shown in Figure 7, the leaf spring 2 will be significantly compressed and deformed when the hanging bolt 3 is lowered, depending on the amplitude.

Even in such a case, the leaf spring 2 simply undergoes significant compressive deformation in response to the load (W + β) acting on the suspension bolt 3, and the gap h3 formed between the upper surface 22 and the locking portions 5a, 5b increases.

When the leaf spring 2 is significantly compressed and deformed, part of the female thread portion (pop nut) 4 on the top surface portion 22 approaches the connecting portion 23. However, as shown in Figure 7(b), by configuring the through hole 42 in this connecting portion 23 with an appropriate diameter, part of the pop nut 4 can be loosely inserted inside the through hole 42.

<Summary>
As described above, according to the above embodiment, the leaf spring 2 is attached to the main body 10 in a pre-compressed state, so that in a normal state, even if only the weight (W) of the ceiling or the like acts as a load on the hanging bolt 3, the leaf spring 2 does not elastically deform, and in this state, it is no different from a state constructed solely from inelastic material. Therefore, the leaf spring (spring body) 2 does not repeatedly elastically deform and cause the installation position on the ceiling or the like to become unstable.

On the other hand, when the ceiling or other object vibrates, a load (W + α or W + β) that exceeds the weight (W) of the ceiling or other object acts on the object, and the leaf spring 2 elastically deforms, absorbing and converging the vibration.

Although the embodiments and variations of the present invention have been described above, the present invention is not intended to be limited to these embodiments and variations. In other words, the elements exemplified as embodiments and variations may be further modified, or other elements may be added.

For example, in the above embodiment, the locking portions 5a, 5b are configured by bending portions of the wall portions 11a, 11b of the main body 10 inward, but the locking portions 5a, 5b may also be formed by fastening a separate member to the wall portions 11a, 11b by welding or the like.

Furthermore, while a pop nut was used for the female thread portion 4, it is not limited to this and any material that can support the suspension bolt 3 will do. In particular, when using a pop nut, the purpose is to make it possible to adjust the support state (installation height) of the suspension bolt 3 by rotating the suspension bolt 3, so a configuration in which the nut is welded to the upper surface portion 22 of the leaf spring 2 may also be used.

1. Vibration-proof sling 2. Leaf spring (spring body)
3 Hanging bolt 4 Female thread part (Pop nut)
5, 5a, 5b Engagement portion 10 Main body portion of vibration-isolating sling 11 Bottom portion 11a, 11b Wall portion of main body portion 12 Insertion portion 13 Engagement insertion portion 14 Screw portion (for engaging beam material)
15 Female screw (for securing beam material)
16, 17 Rivet holes 21 Lower surface portion of leaf spring 22 Upper surface portion of leaf spring 23 Leaf spring connecting portion 24, 25 Curved regions 26, 27 Fixing holes (for rivets)
28, 29 Rivets 41, 42, 43 Leaf spring through holes (leaf spring insertion portions)
W Normal load (weight of frames and ceiling, etc.)
α, β Additional load (load due to vibration)

Claims (4)

A vibration-isolating sling for suspending a ceiling, a base material, or a frame for supporting both of them while exerting vibration-isolating performance,
A main body that can be attached to and detached from a beam material;
a suspension bolt inserted through a portion of the main body;
a spring body attached to the main body portion, supporting the suspension bolt while absorbing vibrations acting on the suspension bolt;
The spring body is a flat spring having at least a lower surface portion and an upper surface portion that are substantially parallel to each other and an S-shaped cross section having a connecting portion in the middle,
the main body includes a bottom surface portion for mounting the lower surface portion of the leaf spring, an insertion portion through which the suspension bolt is inserted at an appropriate location on the bottom surface portion, and a locking portion for locking the upper surface portion of the leaf spring;
The leaf spring has through holes in the upper surface portion, the lower surface portion, and the connecting portion to allow the insertion of a suspension bolt, and the upper surface portion has a female screw portion for connecting to the suspension bolt. The leaf spring is compressed between the bottom surface portion of the main body and the locking portion , and is attached in a state that can be considered to be the same as if it were installed by a non-elastic member in an installed state .
The suspension bolt is inserted into an insertion portion provided on the bottom surface of the main body and a through portion of the leaf spring, and is supported by the female thread portion. An anti-vibration sling as described in claim 1, wherein the main body portion includes an insertion portion that allows the beam material to be inserted, and a threaded portion for clamping the beam inserted into the insertion portion. An anti-vibration sling according to claim 1 or 2, wherein the female thread provided on the upper surface of the leaf spring is formed by a pop nut that is attached to a through hole in the upper surface. A ceiling vibration isolation structure using the vibration isolation hanger according to any one of claims 1 to 3,
The main body portion is engaged with the beam material,
The suspension bolt is screwed into a female screw portion provided on an upper surface of the leaf spring installed in the main body portion,
The leaf spring is compressed between the bottom surface of the main body and the locking portion, and in an installed state, the leaf spring is in a state that can be regarded as being installed by a non-elastic member ,
The frames are supported at the lower part of the hanging bolts,
A ceiling vibration isolation structure characterized in that the ceiling, the base material, or both are supported by the frames.