JPH09177374A - Restoration equipment for preliminary tensile force provision type for seismic insulator of detached house - Google Patents

Abstract

PROBLEM TO BE SOLVED: To control a preliminary tensile force and a restoring force by a construction wherein an outer tube with which one end of a tensil-e spring is engaged and an inner tube wherein a rod piercing the respective centers of a coned disk spring, a hook, etc. is fixed to the front end are fitted by shaking and the other end of the tensile spring is engaged with the hook. SOLUTION: A tensile spring 8 is provided between a hook 9 fitted to the end of an outer tube 6 and a hook 13, and a head 3 fitted to the end of an inner tube 1 and the end part of the outer tube 6 are brought into contact with a stopper 11. When a house is shaken and the tensile spring 8 stretches, the head 3 of the inner tube 7 pushes out the hook 13 through the intermediary of the stopper 11 and a coned disk spring 12. The tensile spring 8 being made to stretch, subsequently, a force of contraction acts as a force of restoration on a spherical bearing 1 in the direction of contraction through the intermediary of the head 3 and a rod 10. According to this constitution, the equipment suppresses shaking in a parallel direction and produces an appropriate damping effect, by providing it oppositely between the ground and a ground sill of the house. By changing a preliminary tensile length of the tensile spring 8, besides, it is possible to change a damping force, to make the equipment small in size and to dispose it in a narrow space.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a detached seismic seismic device which starts to operate when the shaking of a building exceeds a predetermined magnitude when an earthquake occurs and operates so as to restore the building to its original position. It is a pre-tension type restoration device.

[0002]

2. Description of the Related Art Conventionally, various seismic isolation devices have been proposed which start to operate when a building shakes and operate so as to restore the building to its original position. For example, JP-A-7-71109 describes a horizontal spring mechanism in which a cylinder and a plunger are slidably incorporated and a coil spring is wound around the outer circumference of the cylinder. However, this mechanism has a problem in that the cylinder and the tie rod are impacted when they are stretched by an external force and then contracted by the force of a tension spring, and the chain or wire is attached to the front end of the plunger, and the anchor is attached to the rear end of the tie rod. , There is a problem that requires many parts. Further, Japanese Patent Publication No. 58-36145 describes a restoring mechanism having a pretension by arranging a tension spring around the pedestal. This device occupies a large area because it requires the pedestal and a tension spring to be placed around it to cover it. Furthermore, JP-A-56-703
No. 59 proposes a seismic isolation device in which pre-compressed springs are attached so as to face each other around a pedestal. This device is problematic in that it requires a lot of coil springs and space because the pre-compression springs are placed opposite.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a pretension introduction type restoration device which has a small impact when a tension spring expands and contracts, is easy to install even in a narrow space, and has a small size. To do.

[0004]

The structure of the present invention for solving the above-mentioned problems is a pretension introduction type restoration device for a house isolation device as set forth in the appended claims. In summary, a tension spring is wound around the outer surface of the outer cylinder, one end of which is locked at one end of the outer cylinder, and an inner cylinder is secured to the front end by a rod that passes through the centers of the disc spring, stopper, and hook. It is a pretensioning type restoring device for a house isolation device in which the other end of the tension spring is locked to the hook so as to be slidable. The disc spring, the stopper and the hook are slid on the front end of the rod, and one end of the spring is locked by the hook provided on one end of the outer cylinder and the hook slid on the front end of the rod. However, the pretension type restoration device for a detached seismic isolation device has a cover provided between the front end of the rod and the hook provided at one end of the outer cylinder.

[0005]

By virtue of having the above-mentioned structure, the device of the present invention has a vibration damping effect because the force acting on the spring does not exceed its pre-tension until it reaches a certain magnitude against shaking such as an earthquake. If there is no vibration, and the tremor exceeds its magnitude, seismic control is exerted. Even if an external force for rocking a building is applied by strong wind, it does not rock until its magnitude exceeds the pre-tension.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail with reference to the drawings. FIGS. 1 to 3 are explanatory views of a pretensioning-type restoring device of the present invention. 1 shows the restoring device in a normal state, FIG. 2 shows the tension spring of the device of FIG. 1 in an expanded state, and FIG. 3 shows the tension spring of the device of FIG. 1 in a contracted state. This restoring device is provided with an outer cylinder 6 and an inner cylinder 7 at the center, a hook 9 having a spherical bearing 14 is provided at one end of the outer cylinder 6, and the outer cylinder 6 is provided at one end of the inner cylinder 7. Is provided with a head 3 which is large enough to fit inside, and a rod 10 is provided on the head 3, and a stopper 11, a disc spring 12 and a hook 13 are slidably fitted to the rod 10. The stopper 11 is pressed toward the outer cylinder end by the hook 13 via the disc spring 12. Rod 10
At the other end, there is a hook 15 and a spherical bearing 1.

A tension spring 8 is provided between a hook 9 provided at one end of the outer cylinder 6 and a hook 13 slidably fitted to the rod 10 so as to provide an appropriate pre-pulling force. Has been adjusted. A stretchable cover 2 is provided between the hook 9 and the hook 15, and covers the entire tension spring. The operation of this pre-tension spring will be described. In the normal state, as shown in FIG. 1, the end of the head 3 and the end of the outer cylinder 6 provided at one end of the inner cylinder are in contact with the stopper 11. As shown in FIG. 2, the head 3 of the inner cylinder 7 pushes out the hook 13 through the stopper 11 and the disc spring 12 in the state where the building starts to swing and the pre-tension spring extends, so that one end is fixed to the hook 13. The tension spring 8 is stretched. As a result, the force of contraction of the tension spring 8 acts as a restoring force (trigger function) in the direction of contracting the spherical bearing 1 via the head 3 and the rod 10 at one end of the inner cylinder 7. As shown in FIG. 3, when the pre-tension spring is contracted from the normal state, the inner cylinder 7 is submerged in the outer cylinder 6, and the head 3 at the end of the pre-tension spring is also separated from the stopper 11 and submerged in the outer cylinder 6. It will be in the state of doing. In this state, since the stopper 11 remains at the end of the outer cylinder 6, no force acts on the head 3 of the inner cylinder 7, and therefore no force is exerted on the spherical bearing 1 at the end of the rod 10. Does not work.

[0008] As a set of two of these devices,
By installing them so as to face each other with the base of the rocking building, rocking in a direction parallel to this device can be suppressed. Therefore, by installing this device in the required direction in the required number of sets, it is possible to exert an appropriate vibration control function (trigger function). Also,
The seismic damping force can be changed by changing the pre-tension length of the tension spring 8.

[0009]

As described above, since the device of the present invention has the trigger function, the pretension and the restoring force can be easily controlled. Further, since the spherical bearing is used, it has a restoring force in a direction other than the horizontal movement in the longitudinal direction of the device. Further, because of the small number of parts and small size in the structure of the device, it can be arranged in a narrow place.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a specific example (normal state) of a restoration device of the present invention.

FIG. 2 is an explanatory view of a state where a tension spring of the device of FIG. 1 is expanded.

FIG. 3 is an explanatory view of a state in which the tension spring of the device of FIG. 1 is contracted.

[Explanation of symbols]

 1 spherical bearing 2 cover 3 head 4 elastic body such as disc spring or compression coil spring 5 friction material 6 outer cylinder 7 inner cylinder 8 tension spring 9 hook 10 rod 11 stopper 12 disc spring 13 hook 14 spherical bearing 15 hook

Front page continuation (72) Inventor Toshio Omi 3-5-3 Tatsumi, Koto-ku, Tokyo Mitsubishi Steel Mfg. Co., Ltd. Sound and Vibration Department (72) Inventor Akira Matsuda 3-5-3 Tatsumi, Koto-ku, Tokyo Mitsubishi Steel (72) Inventor, Daisuke Yaguchi 3-5-3 Tatsumi, Koto-ku, Tokyo Mitsubishi Steel Mfg. Co., Ltd.

Claims (4)

[Claims] 1. An outer cylinder in which one end of a tension spring wound around the outer periphery is locked and an inner cylinder in which a rod penetrating the center of each of a disc spring, a stopper and a hook is fixed to the front end are slidably incorporated. A pretension introduction type restoration device for a house isolation device, characterized in that the other end of the tension spring is locked to the hook. 2. The detached seismic isolation device according to claim 1, wherein the disc spring, the rod stopper and the hook slide on the front end of the rod when the inner cylinder contracts with respect to the outer cylinder. Pre-tension introduction type restoration device. 3. A spherical bearing and a hook are provided at the rear end of the outer cylinder, one end of a spring is locked to the hook, and a spherical bearing is provided at the front end of the rod. The pretension introduction type restoration device for a detached surface seismic device according to claim 1 or 2, wherein the other end of the spring is locked. 4. The pretensioning die for a detached surface seismic device according to claim 1, further comprising a cover that covers from a hook of a spring in the outer cylinder to a hook provided at a front end of the rod. Restoration device.