| 摘要 |
<p>PURPOSE:To provide a tachograph for work management capable of recording nine kinds of working sections to a maximum by using two recording needles by which three kinds of recording of recording width of a thick line, a middle line and a thin line can be performed respectively. CONSTITUTION:A control means 13 operates a recording needle driving mechanism 11a, and plots the thick line, the middle line and the thin line, respectively on the two recording needles 113U, 113D on a chart sheet 2 by combination decided in advance in accordance with inputted working sections. The recording needle driving mechanism is provided with a cam member 112, a rotary driving source 111 consisting of first to third coils 111b1, 111b2, and 111b3, and a magnet rotor 111c. The magnet rotor and a cam interlocked with it can turn reciprocatively within a range of + or -45 or 90 deg. by selective conduction to the first to third coils.</p> |
