| 摘要 |
PROBLEM TO BE SOLVED: To provide a balance door which can be opened easily by giving a pulling operation to the main body of door. SOLUTION: At the tip portion of upper and lower arm member 8 of which the middle portion in the width direction of the door main body 10 is an oscillating member, which oscillates about the base end portion as the center, and a guided member provided at the guide member extending in the width direction of the balance door main body 10, the connecting portion H is deviated by E from the central portion in the thickness direction of the door main body 10 and, when the door main body 10 is pulled, an oscillating force is created in the arm member 8 around the base end portion as a center.
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