JPH02167959A - Response control holder - Google Patents

Abstract

PURPOSE:To promote flexibility of design and execution by providing bearing sections capable of horizontally moving a holder on a foundation, coil springs for the restoration of position and triggers, and an oscillation absorption damper independently each other. CONSTITUTION:A holder 2 is provided on bearing ball receiving plates 4 through bearing balls 3 so that it is capable of horizontally moving. After that, coil springs 5 bound to ropes 6 are bound to stoppers 7 provided to a foundation 1 and stoppers 8 of the holder 2. The rigidity of the coil spring 5 is so specified that the natural period around the holder 2 is longer than the natural period of earthquake wave, and the trigger initial tensile force is given to the coil spring 5. In addition, a moving member 11 vertically provided from the holder 2 is inserted in viscous fluid 10 in a container 9 provided on the foundation 1, and an oscillation energy absorption damper is formed. According to the constitution, each independent member can be placed in accordance with shapes of the holder, and can be designed and executed freely.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention is applicable to computer rooms, floors of art exhibition rooms,
This relates to seismic isolation frames that are applied to the floors of detached houses.

(Prior art) Conventionally, as a seismic isolation floor construction method, Japanese Patent Application Laid-open No. 86265/1983 discloses a method that uses bearing balls for each fulcrum member of the floor structure, which has minimal resistance during horizontal movement and supports only vertical loads. A damper acting section is provided between the floor structure and the fixed bed system, and is provided with a position restoring function against horizontal movement of the same floor structure, a trigger function during movement, and a damping function. A construction method has been proposed in which a

(Problem to be solved by the invention) However, in the conventional seismic isolation method, the position restoring function, trigger function, and damping function of the floor structure are integrated as a spring damper device, so the structure of the spring damper device is complicated. Therefore, it takes time and effort to manufacture the device and install it on a fixed floor, which increases costs.

Furthermore, depending on the planar shape and area of the target floor, the position restoring mechanism using the spring and the damping mechanism using the damper cannot be placed independently in the most desirable position, which reduces the degree of freedom in design and construction. few.

In view of the problems of the prior art, the present invention provides 112g
The purpose of this is to provide a seismic isolation frame that is simple in structure, has a large degree of freedom in design and construction, and is highly economical.

(Means for solving problem m1) In order to achieve the above object, the seismic isolation frame according to the present invention has the following features:
A movable support part of the pedestal is configured to allow the pedestal to move horizontally on the base and support only vertical loads, and a movable support part of the pedestal is interposed between the pedestal and the base, and has a position restoring function and a trigger of the pedestal. A coil spring device having a function and a vibration energy absorbing damper of the pedestal installed between the pedestal and the base are three types of devices installed independently from each other. The pedestal is installed.

(Function) According to the present invention, as described above, (i) the pedestal on the base is stopped against external force so that the resistance during horizontal movement is minimized, and the horizontal movement and restoration of the pedestal is prevented; (11) a coil spring device interposed between the base and the pedestal having a restoring function and a trigger function for the pedestal; (iii) the base; By configuring the three devices, the vibration energy absorbing damper of the same pedestal and the vibration energy absorbing damper of the pedestal installed between the pedestals, to be arranged independently from each other, each device can be used without being influenced by other devices. According to the planar shape and area of the floor, they can be installed in the most desirable position and in the required number.

(Example) The present invention will be explained below with reference to the drawings.

Figures 1 and 2 show an embodiment of the present invention, in which (1) is a base such as a fixed bed, and (2) is a frame on which various equipment and other loads are loaded. body is shown. The bearing ball (
3) is mounted, and the bearing ball (3) is supported in a movable manner on a horizontal bearing ball receiving plate (4) fixed to the upper surface of the base (1), and The movable support part of the pedestal is constituted by the hair ring ball (3), and the support part supports only the vertical load, so that the pedestal can move freely in the horizontal direction, and the resistance to movement σ is minimized. It has become.

(5) is a coil spring, a cable (6) is connected to one end of the coil spring, and this coil spring (5) with cable is arranged in a keyaki shape,
The free end of the coil spring (5) was anchored to a stop (7) disposed on the base i (1), and the free end of the cable (6) was disposed on the frame (2). It is tethered to a stopper (8).

In addition, the free end of the coil spring (5) is attached to the stopper (8) on the frame (2) side, and the free end of the cable (6) is attached to the stopper (8) on the frame (2) side! It may be connected to the stopper (7) on the (1) side.

The rigidity of the coil spring (5) is set so that the natural period determined from the same rigidity and the weight of the upper frame (2) and its 41 parts is longer than the natural period of the input seismic wave. It is possible to reduce the seismic force applied to the loaded object. Further, the coil spring (5) is given an initial tension that performs a trigger function.

Further, a cylindrical container (9) is installed on the base (1), and a movable member (11 ) is inserted to form a vibration energy absorbing damper.

Since the illustrated embodiment is configured as described above, when the external force acting on the pedestal (2) is below a certain limit, the trigger function of the coil spring (5) causes the pedestal (2) and the base (1) to No relative displacement occurs between them.

If the external force acting on the pedestal (2) exceeds a certain limit and causes a relative displacement between the pedestal (2) and the base (1), the coil with the cable (6) disposed in the impaction Spring (5)
Among them, the coil spring (5) with the cable (6) in the compression direction
) does not work when the cable (6) is bent, and only the coil spring (5) with the cable (6) in the tension direction works effectively, so the coil spring (5) functions as a tension member. , and the initial tension imparted to the coil spring (5), the trigger function of the cabled coil spring operates as designed.

In this way, when a relative displacement occurs between the pedestal (2) and the base 1 (1), the hair ring pole (3) mounted on the pedestal (2) will move 7. Hair ring ball catch plate (4) on %1 (1)
), the pedestal (2) generates only minimal resistance and smoothly moves horizontally.

Along with this, the movable member (11
) is a viscous fluid (10) contained in the same cylindrical container (9).
As it moves inside, it creates viscous resistance, which absorbs vibrational energy.

Since the vibration energy absorbing damper is circular, it acts equally in the horizontal 360° direction.

When the external force acting on the pedestal (2) is removed, the pedestal (2) returns to its previous position by the coil spring (5).

FIG. 3 shows an embodiment in which the present invention is applied to the floor of an L-shaped building, in which the movable support, coil spring device, and vibration energy absorbing damper are placed at appropriate positions in accordance with the building's planar shape. can be set.

(Effects of the Invention) According to the present invention, as described above, the movable support portion of the pedestal is configured to be able to move the pedestal horizontally on the base and support only the vertical load, and The structure of each device is simplified by making three types of devices independent from each other: a coil spring device that has the function of restoring the position of the pedestal and a trigger function, and a damper that absorbs the vibration energy of the pedestal. As a result, manufacturing and installation become easier, and costs can be reduced.

Also, since the three types of devices are independent in this way,
Regardless of the arrangement or quantity of other devices,
The required number of panels can be used in the most desirable arrangement according to the planar shape and area of the target floor, and therefore there are fewer space restrictions, greater freedom in design and construction, and improved longitudinal uniformity.

The invention of claim 2 provides a bearing ball mounted on the lower surface of the pedestal; The movable support portion of the pedestal is constituted by the horizontal hair-ring ball support plate installed on the base, so that the pedestal can be smoothly moved in the horizontal direction.

The invention of claim 3 connects a cable to one end of the coil spring,
By locking the ends of the coil spring and the cable to the pedestal and 11, the coil spring functions as a tension member;
The trigger function is activated as designed by the initial tension applied to the coil spring.

The invention according to claim 4 is characterized in that the vibration energy absorbing damper is constructed by inserting a movable member vertically provided from the pedestal into a viscous fluid contained in a cylindrical container erected on the base. In addition to absorbing the vibration energy of
The vibration energy is applied evenly in the 60° direction.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway plan view of an embodiment of a seismic isolation frame according to the present invention, FIG. 2 is a side view thereof, and FIG. 3 is a plan view showing another embodiment of the present invention. It is a diagram. (11 base, (2) - frame, (3) bearing pole, (4) bearing ball receiving plate, (5) coil spring, (6) cable, (7) - stopper, (8) stopper, ( 9) Cylindrical container,
(10) - viscous fluid, (11) - one moving member. Agent: Patent attorney: Shige Okamoto (2 persons)

Claims (4)

[Claims] (1) A movable support part of the pedestal which is configured to allow the pedestal to move horizontally on the base and support only vertical loads, and a movable support part of the pedestal which is interposed between the pedestal and the base and which restores the position of the pedestal. A coil spring device having a function and a trigger function, and a damper for absorbing vibration energy of the pedestal installed between the pedestal and the base, which are three types of devices arranged independently from each other. A seismic isolation pedestal, characterized in that the pedestal is installed on a base. (2) The seismic isolation pedestal according to claim 1, wherein the movable support portion of the pedestal comprises a bearing ball mounted on the lower surface of the pedestal and a horizontal bearing ball support plate installed on the base. (3) The seismic isolation according to claim 1, wherein the coil spring device has a cable connected to one end of the coil spring, and each end of the cable and the coil spring is latched to the pedestal and the base. Device. (4) The vibration energy absorbing damper includes a cylindrical container containing a viscous fluid installed on the base, and a movable member suspended from the pedestal and inserted into the viscous fluid in the container. The seismic isolation device according to claim 1.