| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a frame attaching device for grand piano by which a frame is attached to a back assembly in the vertical direction with a high precision by a simple constitution. SOLUTION: Plural frame base setting holes 14 are formed in positions along the outer periphery of a back assembly 1 up to a prescribed height, and plural bolt holes 10 are formed in plural positions of a frame F corresponding to frame base setting holes 14, and plural frame bases 11 have a prescribed height larger than the depth of frame base setting holes 14 and have bolt holes 12 formed and are fitted to frame base setting holes 14 respectively and are fixed to a heap 2, and plural attaching screws 9 are inserted to bolt holes 10 and 12 from above with a frame F on frame bases 11 and are tightened to the heap 2 to fix the frame F.</p> |
