PROBLEM TO BE SOLVED: To solve the problems, wherein a conventional working truck requires transferring operation to need labor and time and to cause cost increase when changing the rails from one to another by preparing an another working truck and transferring the load to the truck because the change is lateral motion.SOLUTION: The working truck is constituted as follows. Front and rear wheels 4 and 5 for traveling on the rails 3 are installed, and right and left transferring wheels 6a, 6b, 6c and 6d are installed in the lower part of the working truck 1 between the front wheels 4 and the rear wheels 5 in the intermediate position in the right and left direction. The right and left transferring wheels are installed so as to be lifted and lowered between an upper position and a lower position for grounding and traveling, and a rail-detector 7 is constituted by arranging a detecting part 7a thereof at a position lower than the right and left transferring wheels and higher than the lower end parts of the front and rear wheels 4 and 5, and at a position at the front side or the rear side of the right and left transferring wheels.COPYRIGHT: (C)2009,JPO&INPIT【課題】従来の作業台車は、一つのレールから他のレールに移る場合、横移動のために別の台車を用意して乗せ替えて移動させるため、移し替える作業が必要で労力と手数を要し、コスト高となる課題があった。【解決手段】この発明は、作業台車(1)の下部に、レール(3)上を走行する前・後輪(4)(5)を設け、該前輪(4)と後輪(5)の間で、左右の中間位置に、左右移動車輪(6a)(6b)(6c)(6d)を設け、該左右移動車輪は、上方位置と接地・走行する下方位置との間を昇降可能に設け、レール検出器(7)は、その検出部(7a)を、前記左右移動車輪より低い位置で、前記前・後輪(4)(5)の下端部より高い位置にあって、しかも、前記左右移動車輪より前側、又は後ろ側に配置して構成した作業台車としている。【選択図】 図1
