| 摘要 |
PROBLEM TO BE SOLVED: To reduce a manufacturing cost of a chassis, and to easily and accurately assemble a keyboard device by dividedly constituting the chassis of plural chassis, and mutually connecting the plural chassis by a connecting member. SOLUTION: A chassis 2 is dividedly constituted of eight chassis in total of intermediate chassis of central six pieces, the lowest sound part chassis and the highest sound part chassis, and is supported on a shelf board 5. The eight chassis 2 are mutually connected by fixed four connecting bars 13, and are constituted of a rear connecting bar 13a, first/second intermediate connecting bars 13b, 13c and a front connecting bar 13d in order from the rear side. A reinforcing rib 26 is fixed to the four connecting bars 13 for connecting the chassis 2, and is constituted of a rib main body extending in the longitudinal direction and the four horizontal installing parts formed in the rib main body. Rotatably installed 88 keys 3 and a hammer 4 are respectively provided in the rear end part and the central part of the chassis 2. |
