| 摘要 |
PROBLEM TO BE SOLVED: To provide a Japanese drum capable of being reducing a production period, and adjusting tension of a sheet of the Japanese drum easily.SOLUTION: Provided is a Japanese drum D having drum surfaces on both ends of a trunk 1. The Japanese drum D comprises: sheet fixing rings; and a required number of rods 4 for tension adjustment, for adjusting a tension degree of the sheet 2. The sheet fixing rings have inner diameter larger than outer diameter of the end parts of the trunk 1 and the rods 4 for tension adjustment comprises female screw parts which are screwed together bolts for tension adjustment, and the rods are disposed between the sheet fixing rings. On outer peripheries of the sheet fixing rings, ring pipes 5 formed by forming a pipe into a ring-state are integrated and disposed respectively. |
