JPH10901A - Base-isolated caster - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a furniture or a television table with base-isolated equipment by replacing their casters, with base-isolated ones. SOLUTION: When a wheel (1) of a caster rotates because of rectilinear movement of a floor caused by a rocking earthquake, a dextrorse spring (2) becomes tight so that the wheel (1) slowly stops. Owing to this operation, articles mounting on the wheel can escape convulsions. The construction of the caster is such that the articles can escape convulsions owing to a vertical shock absorbing spring (7) against a wagging earthquake. With this contrivance, as for a television set mounting on a table with the caster, 500GAL can be reduced by the caster down to 98GAL, thereby insuring safety.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[Industrial applications] By changing the casters used for furniture and TV stand to these seismic isolation casters, the furniture and TV stand are equipped with seismic isolation equipment.

[0002]

2. Description of the Related Art Until now, products of the same application have not been found.

[0003]

It is dangerous that furniture and a TV stand runaway or fall on the floor during an earthquake. By installing this seismic isolation caster, furniture and TV stand are seismically isolated and safe.

[0004]

SUMMARY OF THE INVENTION Wheels (1) against rolls
Right-handed for straight ahead (2) Left-handed for reverse (3)
, And a vertical buffer spring (7) for pitching.

[0005]

[Function] By the action of each spring at the time of an earthquake, shocks can be buffered, and the furniture and TV stand of the main body can be stopped to protect life safely.

[0006]

[Example] As for the prototypes, the springs (2) and (3) were each 20 kg, the upper and lower shock-absorbing springs (7) were 30 kg, and the wheels were 40 mm in diameter. The test was conducted with the seismic test bench set to 500 GAL.

[0007]

As a result of the experiment, with respect to the test table 500GAL,
The TV above the seismic isolation base was seismically isolated by 98 GAL, demonstrating that it was safe.

[Brief description of the drawings]

[Figure 1] Overall configuration of seismic isolation casters

[Explanation of symbols]

 1 wheel 2 right-handed helical 3 left-handed helical 4 free, fixed switching hardware 5 free, fixed switching lever 6 wheel shaft 7 up / down buffer spring 8 shaft 9 bearing 10 fixed screw 11 fixed window 12 decorative case 13 mounting vault nut 14 for rotation bearing

Claims (1)

[Claims] (1) In the case of a rolling earthquake, the wheel (1) rotates in response to the straight running force and the right-handed helical beam (2) is tightened. With this operation, the wheel (1) stops slowly, damping the roll and becomes a seismic isolation, and is a seismic isolation caster of a structure that is seismically isolated by a vertical shock absorbing spring (7) against a pitching earthquake.