| 摘要 |
PROBLEM TO BE SOLVED: To provide a door draw gear which can always maintain a door in a positively closed state, prevents dust or rainwater from blowing indoors due to wind, can be easily incorporated in a rail member in a junk room or a storage, and can be easily restored to normal condition even if it undergoes abnormal condition. SOLUTION: The door draw gear has a minimum contractible force even when the door is closed, and further stores a contractible force when door opening operation is carried out. Then, engagement between the door and the door draw gear is released at a predetermined location, and therefore the draw gear maintains its contractible force. When door closing operation is carried out, the door engages with the draw gear again, and the door is drawn by the contractible force stored in the draw gear.
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