JPS6239209Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is an anti-vibration suspension system that facilitates the work of suspending ceiling base members, etc. at construction sites and exhibits excellent anti-vibration effects in the configuration of anti-vibration ceilings. It's about structure.

Conventionally, for ceiling construction, for example, a hanging bolt is screwed into an insert buried in a ceiling slab made of concrete, etc., a hanger is fixed to it, a field fence is hung from this hanger, and a field fence is attached to this with a clip. The ceiling base member is formed by fixing the bar,
The ceiling is constructed by attaching plasterboard and finishing materials to this, or by attaching noncombustible boards directly to the ceiling base material.

When applying a hanging type vibration isolator to prevent vibrations caused by external force to a ceiling base member made of lightweight steel frame etc. as mentioned above, it is necessary to use hanging bolts as shown in Figure 3-a and b as a conventional example. The box hanger is divided into two parts, an upper part and a lower part, and a vibration-proof rubber and a box hanger are combined, and the hanger is supported by a hanging bolt below the box hanger in the same manner as described above, and a frame support is hung therefrom.

The conventional anti-vibration rubber (abbreviation RVI) is shown in Figure 1-
Round shape as shown in plan and elevation of a and b, 1
2 is a metal plate, 2 is a rubber-like elastic material, and 3 is a hanger receiving metal plate, the center hole of which is bent to protrude by the thickness of the strip plate of the box hanger. These metal plates 1 and 3 and the rubber-like elastic material 2 are integrally molded during vulcanization molding, and an insertion hole 4 for a suspension bolt is provided in the center. As shown in the plan view and cross-sectional view taken along the line 2-a and 2-b in FIG. It was formed.

The above-mentioned conventional anti-vibration rubber RVI and box hanger 5 are as shown in the elevational views of Fig. 3-a and b.
Fig. 3-a shows that the upper insertion hole 5b of the box hanger 5 is inserted into the upper hanging bolt 6 screwed into the insert of the ceiling slab, and the box hanger 5 is supported with a nut 7. An example of a combination is shown in which a lower suspension bolt 8 is inserted, and the suspension bolt 8 is supported by a nut 9 on a metal plate 1 made of anti-vibration rubber.

Figure 3-b shows an example in which two anti-vibration rubber RVIs are in contact with the top and bottom of the box hanger 5. In this case, the box hanger 5 and the anti-vibration rubber RVI are inserted into the upper suspension bolt 6, and the anti-vibration rubber RVI is inserted with the nut 7. Support the vibration rubber and the box hanger, place the vibration isolation rubber RVI on the inside lower part of the box hanger 5 as in the case of Fig. 3-a, insert the lower hanging bolt 8, and tighten the nut 9.
A ceiling vibration-proof hanging structure is formed by combining the lower hanging bolts 8 so as to be supported on the vibration-proof rubber metal plate 1. Therefore, the box hanger 5 is only supported by the nut 7 and can freely move upward along the upper hanging bolt 6. Further, the lower suspension bolt 8 can also be freely moved upward.

In the conventional hanging anti-vibration rubber as described above, the anti-vibration rubber and the box hanger 5 are not combined, so the box hanger and the anti-vibration rubber are inserted into the hanging bolt on-site and assembled by screwing the nut into the bolt. The installation work at the site is complicated, and the box hanger is in an unstable condition because it is only supported by the nut 7 and is not fixed.In addition, the lower hanging bolt 8 is attached to the ceiling base material when installing the ceiling. Even when attaching edge supports, etc., the lower suspension bolts were not fixed and could move freely, making the work difficult and requiring a considerable amount of time to assemble.

Furthermore, the vibration isolating rubber used has a structure in which the lower suspension bolt 8 is supported by a nut 9 on a general vibration isolating rubber metal plate 1 sandwiched between the upper and lower metal plates 1 and 3. It goes without saying that the structure is insufficient to obtain a sufficient vibration-proofing effect.

In addition to the above, a suspension vibration-proof ceiling structure is disclosed in Utility Model Application Publication No. 123111/1983, which is a conventional shear type with a soft spring constant and is widely used for vibration-proof support of lightweight machinery and equipment. The method has been used for ceiling support, which not only has long-term stability problems but is also weight-inefficient.

Therefore, the inventors developed a new suspension structure with the aim of solving the defects of the conventional hanging vibration-proof rubber and creating a ceiling vibration-proof suspension structure that can provide a stable and sufficient vibration-proofing effect over a long period of time. It was devised.

Next, aspects of this invention will be explained based on exemplary drawings.

FIG. 4 is an elevational view, partially in cross section, of the ceiling vibration-proof hanging structure of this invention.

Figures 5-a and 5-b show a plan view and a cross-sectional view of the upper vibration-isolating rubber used in this invention, and Figures 6-a and 6-b show a plan view and a cross-sectional view of the lower vibration-isolating rubber used in this invention.

The upper vibration isolating rubber 10 in FIG.
0a has a fitting recess 10b into which the lower vibration isolating rubber is fitted, a suspension bolt insertion hole 10c above the fitting recess 10b, and an upper metal plate (or plastic plate) 10d.
is integrally bonded during vulcanization molding of the rubber-like elastic body, and the fitting recess 10b has an enlarged inner side with a triangular cross section.

The lower vibration isolating rubber 11 in FIG.
1a has a fitting recess 10b for upper vibration isolating rubber.
A fitting protrusion 11b is formed to fit with the rubber-like elastic body, a hanging bolt insertion hole 11c is formed in the center, and a metal plate (or plastic plate) 11d is attached to the lower surface of the rubber-like elastic body during vulcanization molding. The fitting protrusion 11b has a shape in which the outer diameter of the fitting protrusion is increased to have a triangular cross section.

In addition, the combination of the above-mentioned vibration isolating rubbers is made by fitting the fitting recess 10b of the upper vibration isolating rubber 10 and the fitting protrusion 11b of the lower vibration isolating rubber 11 so that the triangular enlarged portions mesh with each other to form one piece. The combination vibration isolating rubber is formed, and the relative plane part Rf in this combination
In other words, on the flat surface of the hanger 12 that the upper flat surface 12a comes into contact with, a fiber reinforcing material covered with a rubber-like elastic body is pasted or a fiber reinforcing material is applied to the vibration-proofing material as long as it does not significantly impair the vibration-proofing properties. They may be integrally bonded during rubber vulcanization molding.

In this case, when the hanger 12 is fastened and fixed between the vibration isolating rubber on the upper surface and the lower surface, a more suitable supporting state can be obtained.

FIG. 7 shows an example of a hanger for hanging from the ceiling, and various modifications of the L-type system and the LG-type system can generally be used. In short, the hanger is sandwiched between the rubber-like elastic bodies of the upper anti-vibration rubber and the lower anti-vibration rubber, and has the feature of exhibiting a high degree of vibration absorption.

This hanger 12 has an upper flat part 12 held between an upper vibration isolating rubber 10 and a lower vibration isolating rubber 11 .
It is formed of a hanging part 12c extending downward at right angles from a and a grip part 12d for receiving a channel steel, and an insertion hole 12b into which a hanging bolt 15 is inserted is provided in the center of the upper flat part 12a.

In addition, this idea is based on the upper flat part of the hanger.
Relative plane part Rf between the top anti-vibration rubber and the bottom anti-vibration rubber
The other shape of the hanger can be modified as appropriate depending on the condition of the ceiling base member.

The ceiling vibration-proof hanging structure of this invention, which is composed of the above-mentioned parts, is as illustrated in the front view of FIG. 4, and as shown in the front view of FIG .
b, insert the insertion hole 12b of the upper flat part 12a of the hanger 12 , and insert the fitting protrusion 11b into the fitting recess 10b of the upper vibration isolating rubber 10.The combination vibration isolating rubber is embedded in the ceiling slab CS. It is inserted into a hanging bolt 15 screwed into an insert 14 and fixed at a required height with nuts 16 and 17.

An example is shown in which a frame support 13 of a ceiling base member is suspended from the grip portion 12d of the hanger 12 having the vibration-proof hanging structure constructed in this way.

As described above, in the ceiling vibration-proof suspension structure of this invention, the top-side vibration-proof rubber, bottom-side vibration-proof rubber, and hanger are preassembled and transported to the construction site, and then screwed into the insert buried in the ceiling slab. hanging bolt 15 into which the nut 16 is screwed
Not only is it extremely easy to install, it also eliminates the need for box hangers as in the past, making it highly economical.

In addition, the hanger is set in a stable fixed state by fastening between the anti-vibration rubber on the upper and lower surfaces, so the instability of the conventional example is eliminated, and the hanger can be used as a ceiling support for ceiling base members. When installing it, there is no unstable element such as wobbling, and the installation work is extremely easy.

Furthermore, the important feature of this invention's hanger fixing and vibration-proofing performance is that it eliminates any component parts that restrict the degree of freedom of vibration absorption, and uses the central part of a single combination vibration-proofing rubber for hanger hanging on the ceiling. The upper flat part of the hanger is supported by the upper part which has an enlarged triangular cross-section inside the fitting recess;
The outer diameter of the mating protrusion is increased to have a triangular cross-sectional shape, and the lower surface part is mated and tightened to ensure a strong fixation and high vibration absorption performance due to special operation. It is.

In the conventional type, the flat parts of separate anti-vibration rubbers were stacked on top of each other, so when the rubber was tightened, stress was attenuated in the outer circumferential direction due to the flow of the rubber in the planar outer circumferential direction. However, the structure of this invention described above has the disadvantage that the triangular enlarged part of the fitting recess with a triangular cross section and the fitting protrusion with a triangular cross section is engaged with each other. Since they form one combined vibration isolating rubber, the angle of the increased triangular cross section of the internal fitting protrusion decreases by tightening and compression. Internally, the clamping action is performed to press the outer periphery of the fixed part of the hanger, so it maintains strong fixation for a long time without loosening, and has the ability to completely absorb even the slightest vibration. It is. In other words, since the hanger is sandwiched between the vibration-isolating rubber elastic materials, all vibrations from the upper ceiling slab and from the lower interior ceiling are directly blocked from propagating through the rubber-like elastic materials. , which exhibits extremely excellent vibration absorption characteristics.

[Brief explanation of the drawing]

Figure 1-a is a plan view of a conventional anti-vibration rubber;
Figure 2-b is an elevational view, Figure 2-a is a plan view of the conventional box hanger, Figure 2-b is a cross-sectional view taken along the line 1-2 of the same box hanger, and Figures 3-a and b.
is an elevational view of a conventional combination structure using a box hanger consisting of an upper hanging bolt, lower hanging bolt, and anti-vibration rubber, and Fig. 4 shows a partial cross-section of the ceiling vibration-proof hanging structure of this invention. Elevation, Figure 5-a
is a plan view of the upper vibration isolating rubber, FIG. 5-b is a sectional view thereof, FIG. 6-a is a plan view of the lower vibration isolating rubber, FIG. is a perspective view showing an example of a hanger, 10 ...Top vibration isolating rubber, 10b...Fitting recess,
11 ... Bottom vibration isolating rubber, 11b... Fitting protrusion,
Rf...Relative plane part, 12a...Upper plane part of the hanger, 15...Hanging bolt, 16, 17...Nut, CS...Ceiling slab.

Claims (1)

[Scope of utility model registration request] A piece of combination vibration isolating rubber with only the top and bottom surfaces glued to a metal plate is divided into an upper surface portion having a fitting recess and a lower surface portion having a fitting protrusion, and the inside of the fitting recess has a triangular cross section. The outer diameter of the fitting protrusion is increased to have a triangular cross section, and the upper flat part of the hanger for hanging from the ceiling is held between the relative flat parts of the combination vibration isolating rubber, and the fitting protrusion is fitted into the fitting recess. A vibration-proof hanging structure for a ceiling in which a combination vibration-proofing rubber whose triangular enlarged part is fitted with a mating protrusion is inserted into a hanging bolt from a ceiling slab, and then tightened and fixed with a nut.