| 摘要 |
PROBLEM TO BE SOLVED: To secure desired strength, without requiring a reinforcing member for a connecting part of an upper plate and a bottom plate, in an excavation bucket of dividedly forming a bottom part of the upper plate and the bottom plate. SOLUTION: The bottom part is formed of the upper plate 2 for fixing a pair of brackets 3 connected to an arm and the bottom plate 20 welded to this upper plate 2. The bottom plate 20 is welded to the upper plate 2 by arranging a predetermined superposing margin R. The bottom plate 20 is welded to the outside of the upper plate 2. The bottom plate 20 has a recess part 20a for storing respective end parts of the brackets 3. A welding part 21 is formed for fixing the upper plate 2 and the bottom plate 20 including welding in this recess part 20a. COPYRIGHT: (C)2006,JPO&NCIPI
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