| 摘要 |
PURPOSE:To vary power at the compressor side according to working air quantity by varying a contact position at the compressor side where a belt is wound and the motor side automatically. CONSTITUTION:A signal of pressure value in a receiver tank 13 is constituted so as to be inputted into a controller 22. Drive regulating means 4, 7 are operated by this input signal, varying each interval between pulley pieces 2, 3 and pulley pieces 5, 6, and thus they are constituted so as to be enabled to width size commensurate to the detecting pressure value. Consequently, when much air quantity is required, rotational speed at the side of a compressor 9 is made higher, and at the time of unloading and using little air quantity or the like, the rotational speed at the side of the compressor 9 is reducible. |
