To reduce the difference in height between when a pair of shells of a rope-type clamshell bucket are opened and when the pair of shells are closed.SOLUTION: A clamshell bucket includes a pair of shells rotated between a closed position and an opened position, a movable body rotationally connected to the pair of shells with a connection pin above an opening part of the pair of shells arranged in the closed position and moved vertically to open/close the pair of shells, a support body rotationally supporting the shells with support pins between the closed position and the opened position at each of a space on one side and a space on the other side while sandwiching a vertical surface passing the center of the connection pin, and sheaves each provided on the movable body and the support body around which a rope for vertically moving the movable body is wound. The support pins are provided at positions closer to the vertical surface side than outer end parts of the pair of shells in the orthogonal direction orthogonal to the vertical surface at each of the space on the one side and the space on the other side while the pair of shells are arranged at the closed position.SELECTED DRAWING: Figure 2
【課題】ロープ式のクラムシェルバケットの一対のシェルを開いた時と閉じた時の高さの差を小さくする。【解決手段】クラムシェルバケットは、閉位置と開位置との間で回動する一対のシェルと、閉位置に配置された一対のシェルの開口部の上方で、連結ピンによって一対のシェルが回動可能に連結され、上下方向に移動して、一対のシェルを開閉させる移動体と、連結ピンの中心を通る鉛直面を挟む一方側の空間と他方側の空間のそれぞれで、支持ピンによってシェルを閉位置と開位置との間で回動可能に支持する支持体と、移動体と支持体のそれぞれに設けられて、移動体を上下方向に移動させるロープが掛け回されるシーブとを備え、支持ピンは、一対のシェルが閉位置に配置された状態で、一方側の空間と他方側の空間のそれぞれで、鉛直面に直交する直交方向における一対のシェルの外端部よりも鉛直面側の位置に設けられる。【選択図】図2
CLAMSHELL BUCKET
クラムシェルバケット
2022-07-29
Patent
Electronic Resource
Japanese