| 摘要 |
The present invention relates to a trolley bar comprising a shoe in contact with a pantagraph shoe of an overhead crane, and a steel frame installed at the lower part of the shoe and supporting the shoe, which is characterized by comprising side bars combined with the side of the trolley bar, and of which the upper surface is located on the same line as the upper surface of the shoe, to increase the contact surface in contact with the phantagraph shoe. According to the present invention, the side bars are installed at both sides of the trolley bar respectively, to increase the contact area in contact wiwth the pantagraph shoe of the overhead crane, to prevent the abnormal wear of the pantagraph shoe and have an effect of preventing copper string. |
