| 摘要 |
PROBLEM TO BE SOLVED: To provide a cover plate, which enables a groove part to be formed on a body part in any shape by easy processing and can improve fatigue strength of a welding root part.SOLUTION: A cover plate 1 according to this invention is installed on a reinforcement surface 5a of one surface or both surfaces of a main member 5 and has a body part 2, which is formed into substantially tabular shape and attached by welding on the reinforcement surface 5a of the main member 5, and a groove part 3, which is formed by cutting out a rear side A of the body part 2 facing the reinforcement surface 5a of the main member 5. The groove part 3 has a predetermined residual plate thickness a at a groove bottom 30 of a front side B of the body part 2. The groove is formed along a side 22 on a short side of the body part 2 at a position separated by a predetermined separating distance d from the side 22 on the short side of the body part 2.SELECTED DRAWING: Figure 4 |
