JPS6316549B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vibration-isolated building. When installing equipment that generates large vibrations, such as vibrating screens, compressors, crushers, etc., the machine foundation is usually constructed separately from the structure of the building; This also occurs when it is installed on a superstructure. In this case, the equipment that generates vibrations transmits large vibrations to the surrounding ground through the foundation of the upper structure of the multi-story building.
Not only do so-called vibration disturbances occur to the surrounding area, but the multi-story building itself also suffers from various inconveniences due to the vibration. The inventors of the present application have conducted research and research to prevent vibrations when equipment that generates large vibrations as described above is installed on a machine foundation that is disconnected from the structure of the building.
Patent Application No. 1982-22132 (Patent No.
No. 1050411). The present invention is a result obtained by further advancing the above-mentioned research and experiments, and is a vibration-proof building in which equipment that generates large mechanically forced steady vibrations is installed in the structure of a multi-story building. The resulting vibration vibrates the upper structure of the building, which is an elastic body, and the vibration is transmitted to the surrounding ground via the foundation. A weight and an elastic support such as a steel rod or a coil spring are fixed at a proper place in the structure of the above-mentioned multi-story building, and the weight is fixed at a proper place on the elastic support and the elastic support is fixed at a proper place on the structure. By installing one or more pseudo-resonators configured so that the vibration of the weight is extremely small in attenuation and synchronized with the above-mentioned steady-state vibration, it is possible to reduce the vibration to a very noticeable level, as in the case of the vibration-isolated mechanical foundation described above. This provides a great anti-vibration effect.

The vibration-proof building of the present invention will be explained below with reference to embodiments shown in FIGS. 1 to 3. The machine 1, which is a crusher, is installed on the second floor slab of a three-story structure, and the false resonator 2 is mounted on a foundation 3, which is part of the structure of the building. Thus, in the above-mentioned false resonator 2, elastic supports 4 made of two parallel H-steel rods are bridged and fixed perpendicularly to the protruding parts of the left and right foundations 3, respectively, and the elastic supports 4 are
A weight 6 is fixed on a composite elastic support 5 of two H-steel rods further fixed to both ends of the left side, which has an extremely small amount of attenuation of the vibration of the weight.
The two pseudo resonators 2 on the right are formed. Furthermore, the second
In the figure, these false resonators 2, 2 are arranged side by side on the foundation, making a total of four.

In the example shown in this drawing, the elastic support 4 made of H steel rod has a length of 11,260 mm, a width of 350 mm, a height of 400 mm,
The elastic support 5 made of H steel rod has a width of 300 mm and a height of 300 mm.
Weight 6 is approximately 4.5 tons, and the rotation speed of machine 1 is 695 r.pm.
In the experimental measurement, as shown in the graph of Fig. 4, the protrusion length l of the weight 6 from the base 3 was 1450.
At the position of mm, the amount of vibration Vo in the foundation of the multi-story building is
is around 0.8mm/sec, but the maximum vibration isolation effect is 0.02mm/sec. Note that V shown in this graph represents the measured value of the amount of vibration at the foundation when the position of the protruding length l of the weight 6 from the foundation 3 was changed in the range of 1230 mm to 1630 mm.

As shown in the above embodiment, a weight 6 is fixed to an elastic support made of an H steel rod at the foundation of a multi-story building structure in which equipment that generates large mechanically forced steady vibrations is installed. By installing the false resonator 2, which has an extremely small amount of attenuation of the vibration of the weight and is tuned to the above-mentioned steady vibration, the vibration of the foundation of the structure can be effectively reduced. This can effectively prevent the generated vibrations from being transmitted to the surrounding ground. Furthermore, in the pseudo resonator 2 described above, instead of the steel rod of the embodiment that supports the weight 6, it is also possible to use a coil spring that can support the weight with a small amount of attenuation of vibration. Next, the attachment of the false resonator to the structure is not limited to the basis of this embodiment, but in some cases it may be attached to an appropriate position on the upper structure, and furthermore, it can be used for vibration isolation of the structure itself. is also helpful.

[Brief explanation of the drawing]

Fig. 1 is a front view showing one embodiment of the vibration-proof structure of the present invention, Fig. 2 is a top view of the main parts thereof, Fig. 3 is a longitudinal cross-sectional view taken along line XX of the previous figure, and Fig. 4 is an experiment. FIG. 1... Machine that is crusher, 2... False resonator, 3
...Foundation of multi-story building, 4...Elastic support made of H steel rod, 5...Elastic support made of H steel rod, 6... Weight.

Claims (1)

[Claims] 1. At appropriate locations in the structure of a multi-story building in which equipment that generates large mechanically forced steady vibrations is installed, elastic supports such as weights, steel rods, and coil springs are installed.
A pseudo-resonator is constructed by fixing a weight at a proper position on an elastic support and fixing the elastic support at a proper position on a structure so that the vibration of the weight has an extremely small amount of attenuation and is tuned to the above-mentioned steady vibration. A vibration-proof building characterized by having one or more vibration-proof structures installed.