JPH041357A - Earthquake-proof floor structure - Google Patents

Abstract

PURPOSE:To improve earthquake-proofness by providing the opposed sections of an earthquake-proof floor supported on a floor through an earthquake-proof device and a tie-in floor closing a clearance formed to a wall with anti-friction means reducing friction by contacts at the time of relative displacement. CONSTITUTION:An earthquake-proof floor 1, on which equipments 7 such as a computer are put, is installed onto a floor 2 through earthquake-proof devices 3. A tie-in floor 6 closing the clearance 5 of the earthquake-proof floor 1 and a wall 4 is fixed to the wall 4. The gap 8 of the opposed sections of the earthquake-proof floor 1 and the tie-in floor 6 is provided with an anti-friction means by a bearing and an anti-friction layer, etc. by the coating of a Teflon resin. Friction by contacts at the time of relative displacement is reduced. Accordingly, earthquake-proofness at the time of an earthquake, etc. can be improved.

Description

[Detailed description of the invention] [Purpose of the invention] (Industrial application field) The present invention relates to a seismic isolation floor structure.

(Prior Art) FIG. 11A is a partially cutaway front view showing the overall configuration of an example of a conventional seismic isolation floor structure, and FIG. 11B is an enlarged cross-sectional view showing the joint floor portion thereof. A seismic isolation floor 1 is supported on a building floor 2 by a seismic isolation device 3.

Although the illustrated seismic isolation device 3 has a spring structure, it may have any other structure using, for example, laminated rubber as a vibration absorbing medium. A clearance 5 is provided, and this clearance is closed by a joining floor 6. Note that 7 in FIG. 1 indicates seismically isolated equipment, such as a computer, installed on the seismically isolated floor 1. - The seismic isolation device 3 is composed of a spring or other vibration absorbing medium with low rigidity and a damper, and reduces the acceleration due to vibrations input from the building to the seismically isolated equipment 7 during an earthquake. It has the function of greatly improving the earthquake resistance of.

On the other hand, since the seismic isolation device 3 uses a weakly rigid spring or the like as a vibration absorbing medium, it is inevitable that the relative displacement of the seismic isolation floor 1 supported by it during an earthquake will increase. Therefore, a clearance 5 is set between the building wall surface 4 and the end of the seismic isolation floor 1, and in the event of an earthquake, the seismic isolation floor 1
can move freely within the range of clearance 5.

Further, the clearance 5 is blocked by a holding floor 6 to prevent personnel, articles, etc. from falling into the clearance 5.

Therefore, the end of the seismic isolation floor 1 and the end of the joining floor 6 are overlapped, and there is a space between them so that the friction between them does not interfere with the seismic isolation function of the seismic isolation floor 1. A slight gap 8 is provided in order to achieve this.

(Problems to be Solved by the Invention) The gap 8 is normally designed to be maintained both during normal times and during earthquakes. However, if equipment that is not subject to seismic isolation is placed near the end of the connecting floor 6, the connecting floor 6 may bend due to the weight of the equipment. If the deflection occurs, there is a possibility that the connecting floor 6 and the base isolation floor 1 will come into contact in normal times, and the connecting floor 6 and the base isolation floor 1 will come into contact when the base isolation floor 1 is moved due to an earthquake.

Furthermore, even when vertical earthquake motion acts, there is a risk of contact between the two methods.

If the contact between the two occurs as described above, the seismic isolation floor 1 will behave differently than designed due to the friction between the two during an earthquake, and the functions required of the seismic isolation floor will not be maintained.

The present invention has been made based on the above circumstances, and is a seismic isolation system that can maintain the required functions even if the seismic isolation floor and the joint floor come into contact for some reason. The purpose is to provide a floor structure.

[Structure of the Invention] (Means for Solving the Problem) The seismic isolation floor structure of the present invention includes a seismic isolation floor supported on a building floor via a seismic isolation device, and a seismic isolation floor fixed to a building wall. and a connecting floor that closes the clearance between building walls, wherein the seismic isolation floor and the connecting floor have anti-friction means that can reduce friction between the opposing parts when the opposing parts are displaced relative to each other. It is characterized by having the following.

(Function) In the seismic isolation floor structure of the present invention having the above configuration, if a force acts in a direction that reduces the gap between the seismic isolation floor and the joining floor due to some cause and contact occurs between the two. In this case, since the contact between them is made through the friction reducing means, the resistance due to friction against the relative displacement is weak. Therefore, even if contact occurs between the two as described above, the seismic isolation floor structure of the present invention exhibits the expected behavior and does not lose its function as a seismic isolation floor structure.

(Embodiment) The same parts as in FIGS. 11A and 11B are given the same reference numerals. FIG. 1 is a partially cutaway front view showing the overall configuration of the first embodiment of the present invention, and FIG. 2A 2 is an enlarged cross-sectional view showing the joining floor portion of the embodiment, and FIG. 2B is a previous view taken along the line B--B. In this embodiment, a bearing 9 is installed on the lower surface near the end of the connecting floor 6, and a steel plate 9 is installed on the upper surface of the area where the bearing 9 at the end of the seismic isolation floor 1 is expected to move during an earthquake. A bearing receiver 10 is installed.

As shown in FIG. 3A, the bearing 9 and the bearing receiver 10 are not in contact with each other during normal times, but are brought into contact during an earthquake.

In the embodiment with the above configuration, if no force is applied in the direction of contraction as shown in FIG. As shown by the arrow 11 in the diagram, it behaves in the same way as a conventional seismic isolation floor and performs the function of the seismic isolation floor 1. 8 A force that reduces the gap 8 due to vertical seismic motion during an earthquake or some other cause When activated, the bearing 9 comes into contact with the bearing receiver 10, as shown in FIG. 3C. In this case, since the bearings 9 can roll with very low friction, the seismic isolation floor 1 can be displaced relative to the joining floor 6 with almost no friction, and the seismic isolation floor 1 It can function as designed.

FIG. 4 is a sectional view of a main part of a modification of the first embodiment. In this modification, the bearing 9 and the bearing receiver 10 are in contact even during normal times. In this modification, even if no force is applied in the direction of reducing the gap 8, the bearing 9 and the bearing receiver 10
However, since the bearings can roll with extremely low friction, the relative displacement between the seismic isolation floor 1 and the joining floor 6 is not hindered in any way.

FIG. 5 is a sectional view of a main part of a second embodiment of the present invention. In this figure, the bearing 9 is attached to the upper surface of the end of the seismic isolation floor l, and the bearing receiver 10 is installed to the lower surface of the joining floor 6. It is clear that this embodiment also provides the same functions and effects as those of the previous embodiment.

FIG. 6 is a sectional view of a main part of a modification of the second embodiment. In this modification, the bearing receiver 10 is
A stopper 12 made of a high damping material is provided at the opening R# of the recess 14 in contact with the bottom surface of the recess 14 provided on the lower surface of the recess 14 . In this modification, the stopper 12 limits the relative displacement between the seismic isolation floor 1 and the joining floor 6 when earthquake motion is large.

FIG. 7 is a cross-sectional view of the main part of the third embodiment of the present invention, and FIG. 8 is a cross-sectional view of the main part of a modification thereof. In the third embodiment, the bearing receiver 10 of the first embodiment is omitted,
In this modification, the bearing receiver 10 of the second embodiment is omitted.

In these embodiments and modifications, the bearing receiver 10 in the first and second embodiments is omitted;
Savings in materials, design, and fabrication, albeit with a slight increase in friction over those embodiments.

Construction and installation can be streamlined.

FIG. 9 is a sectional view of a main part of a fourth embodiment of the present invention. In this embodiment, instead of the bearing 9 and the bearing support 10 of the first embodiment, the upper surface of the joining floor 6 and the upper surface of the seismic isolation floor 1 are provided in a range where sliding is expected due to relative displacement thereof, for example. Anti-friction layer 13.1 with Teflon resin coating etc.
There are 3. Although a slight increase in friction is seen in this example as well, the use of the 5 anti-friction layer 13.13 saves material! The rationalization of the two plans, production, construction, and installation is remarkable.

FIG. 10 is a sectional view of a main part of a fifth embodiment of the present invention.

In this embodiment, the seismic isolation floor 1 is arranged above the joining floor 6, and its end portion is located in the middle of the joining floor 6. The bearing 9 is attached to the bottom surface of the end of the seismic isolation floor 1,
The bearing receiver 10 is installed on the upper surface of the joining floor 6.

In this embodiment, the seismically isolated equipment can be placed up to the vicinity of the end of the seismic isolation floor 1, and the dead space on the seismic isolation floor 1 can be made small.

Note that the present invention is not limited to the above embodiments. That is, in each of the above embodiments and modifications, friction reduction by bearing transfer and friction reduction by sliding between friction layers are employed as friction reduction means, but any other appropriate friction reduction means may be employed. I can do it.

[Effects of the Invention] As is clear from the above, in the seismic isolation floor structure of the present invention, even if there is contact between the seismic isolation floor and the joining floor, the friction at this contact portion is extremely small, and the contact causes The behavior of the seismic floor will not differ from the behavior assumed at the time of design, and the function as a seismic isolation floor structure will not be lost due to the contact. Therefore, 1. Improve the seismic resistance of seismically isolated equipment such as electronic computers. It is very effective.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway front view showing the overall configuration of the first embodiment of the present invention, FIG. BB arrow view, Figure 3 A~
FIG. 3C is a cross-sectional view for explaining the operation of the embodiment, FIG. 4 is a cross-sectional view of a main part of a modification of the first embodiment, and FIG. 5 is a main part of a second embodiment of the present invention. 6 is a sectional view of a main part of a modification of the second embodiment, FIG. 7 is a sectional view of a main part of a third embodiment of the present invention, and FIG. 8 is a main part of a modification thereof. A cross-sectional view, FIG. 9 is a cross-sectional view of the main part of the fourth embodiment of the present invention, and FIG.
The figure is a sectional view of the main part of the fifth embodiment of the present invention, FIG. 11A is a partially cutaway front view showing the overall configuration of an example of a conventional seismic isolation floor structure, and FIG. 11B is the joining floor part thereof. FIG. 2 is an enlarged cross-sectional view. 1... Seismic isolation floor 2... Building floor surface 3.
...Seismic isolation device 4...Building wall surface 5...
・・・・Clearance 6・・・・Composition floor 7・・・
... Seismically isolated equipment 8 ... Gap 9 ...
・Bearing 10...Bearing receiver 14・
...Concave portion 12...Stopper 13...Anti-friction layer

Claims (1)

[Claims] In a structure having a seismic isolation floor supported on a building floor via a seismic isolation device, and a joining floor fixed to a building wall and closing the clearance between the seismic isolation floor and the building wall, the seismic isolation floor, the seismic isolation 1. A seismic isolation floor structure, characterized in that opposing parts of a mating floor are provided with friction reducing means capable of reducing friction between the opposing parts when the opposing parts are displaced relative to each other.