| 摘要 |
<p>PROBLEM TO BE SOLVED: To smoothly perform shape change of a crawler while maintaining required tension of a crawler belt with a simple configuration.SOLUTION: When a leaf spring 34 is attached to a movable arm 26 and the leaf spring 34 is pressed against a crawler belt 30 by rotation of a movable arm 26, the leaf spring 34 receives reaction force from the crawler belt 30 to be elastically deformed. Thus, excessive circumference length of the crawler belt 30 by the rotation of the movable arm 26 can be suppressed. Therefore, huge increase of tension of the crawler belt 30 by the rotation of the movable arm 26 can be prevented, so that change of the tension of the crawler belt 30 can be suppressed. As a result, by a simple configuration that is attachment of the leaf spring 34, shape change of a crawler 14 can be smoothly performed while maintaining required tension of the crawler belt 30.</p> |
