| 摘要 |
<p>PURPOSE:To prevent rear-end collision, when a traveling body is driven in reverse, by opening constant control contacts arranged on parallel connection paths in a section immediately following the section wherein the traveling body exists. CONSTITUTION:Traveling bodies 1A-1C are controlled corresponding to opening/closing of travel control contacts S1-S9 arranged between travel control trolley wires 2, 3, partitioned into sections A1-A9. A set relay KRiC connected with the travel control trolley wire 3 closes a travel control contact Si, a contact Sa(i+3) and a contact Sa(i+4) when it is excited. A reset relay KR(i+2)T opens the travel control contact Si and closes a contact Sb(i+2) when it is excited. The reset relay KR(i+2)T further opens the constant control contacts Sa(i+3), Sa(i+4) and the set relay KRiC further closes the constant control contacts Sa(i+3), Sa(i+4).</p> |
