| 摘要 |
An improvement is made effectively in the strength of a baseball or softball bat constructed by joining a ball-hitting member and a grip member formed of a Fiberglass Reinforced Plastic (FRP) material and a metal material, respectively. In the baseball or softball bat constructed by joining a metal ball-hitting member and an FRP grip member, a joining end region of the grip member has an adhering piece bonded to one of an inner peripheral surface and an outer peripheral surface of a joined end region of the ball-hitting member, and a contact piece for contacting the other of the inner peripheral surface and the outer peripheral surface of the joined end region of the ball-hitting member when the adhering piece is in a bonded state.
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