Earthquake-proof latch mechanism

An earthquake-proof latch mechanism which engages with a reception portion provided on a door body when vibration occurs so that the earthquake-proof latch mechanism can lock and prevent the door body from opening, the earthquake-proof latch mechanism comprising:

• a case body;
• a hook member which is swingably supported in the case body;
• and
• a pendulum member which is vibratably suspended and supported in the case body;
• wherein:
• the hook member includes a hook on one side of a swinging shaft and a pendulum engagement portion on another side of the swinging shaft, the hook engaging with the reception portion, a through hole being formed in the pendulum engagement portion;
• the pendulum member is disposed to penetrate the through hole, and a peripheral surface of the pendulum member facing the through hole is formed into a tapered shape;
• and
• the peripheral surface pushes up an inner periphery of the through hole to swing the hook member when the pendulum member vibrates.