| 摘要 |
Disclosed is an earthquake-proof structure which is capable of securing the safety of a distribution board by uniformly reducing the shock and vibration transferred from the outside. The earthquake-proof structure includes a damper body, a lower damper washer part, a damper piston, an upper damper washer part and a damper cover. The damper body has a cylinder formed with a circular hollow and wings formed at both sides of the cylinder. The lower damper washer part includes a plurality of damper washers having a doughnut shape and is disposed in the cylinder. The damper piston is inserted into the hollow of the cylinder and includes a shaft member formed on an inner portion thereof with a thread, a step member formed between a lower end and a middle portion of the shaft member, and a hole formed on a bottom part of the damper body to pass through the lower damper washer part. The damper washer part includes a plurality of damper washers inserted into the hollow of the cylinder and having a doughnut shape and is disposed on the step member of the damper piston. The damper cover is disposed on the damper body, presses the upper damper washer part, and exposures the shaft member of the damper piston at a constant height through a central hole formed at a central portion thereof. |
