A specialized mechanical device for unloading coal, ore, and other goods at ports and harbors. There are various types, such as those using cranes and chain conveyors. They are broadly divided into fixed and traveling types, and depending on the type of trolley, they are divided into four types: rope trolley type, man trolley type, swivel trolley type, and those with a retractable crane. They range from small-scale types that unload cargo from small vessels such as barges, to large-capacity types that unload cargo from main ships and ships dedicated to transporting ore. In addition to being used at general wharves, they are also widely used at spinning factories, chemical plants, gas plants, thermal power plants, steelworks, etc. [Hidetaro Nakayama] Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend |
港湾などで石炭、鉱石、その他の品物を陸揚げするための専用機械装置。クレーンによるもの、チェーンコンベヤーによるものなど種々の方式がある。固定式と走行式に大別され、トロリーの形式によって、ロープトロリー式、マントロリー式、旋回トロリー式、引き込みクレーン付きの4種に分けられる。艀(はしけ)のような小船から荷揚げする小規模のものから、本船や鉱石運搬専用船から陸揚げする大容量のものまである。一般の埠頭(ふとう)で使用されるほか、紡績工場、化学工場、ガス工場、火力発電所、製鉄所などで広く使用されている。 [中山秀太郎] 出典 小学館 日本大百科全書(ニッポニカ)日本大百科全書(ニッポニカ)について 情報 | 凡例 |
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