| 摘要 |
PURPOSE:To eliminate the need for a fitting reference member and a guide member by molding the mounting guide rail for a drum rack unit part integrally with a main frame body. CONSTITUTION:The main frame body 10 is molded out of a synthetic resin material which has good heat resistance and high mechanical strength so that is front panel 11, rear panel 12, and bottom plate 13 are united by connecting both panels by the bottom plate. The insertion hole 11b for a drum rack unit part 30 is bored in the panel 11 almost at its center part and three guide holes 11c, 11c, and 11e as the fitting reference means for the unit part 30 to the frame body 10 are provided nearby the insertion hole 11b. Guide pins 32 and 32 of a flange part 31 are fitted in the guide holes 11c and 11c to insert the unit part 30 into the frame body 10 at the correct position. Further, the inward position is controlled by the abutting between a couple of right and left drum surfaces 11d formed on the front surface of the panel 11 and the reverse surface of the flange part 31 to make mechanical and electric connections properly. Thus, a reference surface adapted to the fitting installation of component members is provided to the frame body 10 to eliminate the need for many relay parts and guide parts. |
