公开(公告)号：US06286696B1

公开(公告)日：2001-09-11

申请号：US09479171

申请日：2000-01-07

申请人： Eric Brian Van Gorp ,  Myron Glickman ,  Daniel Brian Zakula, Sr. ,  James Baty

发明人： Eric Brian Van Gorp ,  Myron Glickman ,  Daniel Brian Zakula, Sr. ,  James Baty

IPC分类号： B60P300

CPC分类号： B66C13/00 ,  B66C19/007

摘要： A gantry crane including a lifting grappler is provided with a hoist locking mechanism to prevent undesired downward drifting of the grappler, especially during periods when the crane is parked and not in operation. The hoist locking device can selectively secure the grappler in a raised position, maintaining a maximum clearance under the raised grappler. The crane includes a hoist line, such as a chain or cable, that suspendably supports the weight of the grappler, and a hoist actuator for moving the hoist line, thereby lifting or lowering the grappler. In an embodiment, the hoist locking device is selectively operable to secure the hoist line in a predetermined position, preventing the grappler from lowering. For example, an embodiment of the hoist locking device includes a hook-shaped latch member movably mounted to the frame for engagement with a catch member fixed relative to the hoist line. The catch member may, for example, be a projection from a clevis mounted to the hoist actuator. A latching actuator is provided for driving the hook between engaged and disengaged positions.

摘要翻译： 包括提升抓斗的龙门起重机设置有提升锁定机构，以防止卡车的不期望的向下漂移，特别是在起重机停放并且不在操作期间。 起重机锁定装置可以将抓斗选择性地固定在升高的位置，在升起的抓斗下保持最大的间隙。 起重机包括吊挂绳索，例如链条或缆索，其悬挂地支撑抓斗的重量，以及用于移动提升绳的升降机致动器，从而提升或降低抓斗。 在一个实施例中，起重机锁定装置可选择性地操作以将提升线固定在预定位置，防止抓斗下降。 例如，提升锁定装置的一个实施例包括可移动地安装到框架上的钩形闩锁构件，用于与相对于提升线固定的卡扣构件接合。 捕捉构件可以例如是从安装到提升致动器的U形夹的突起。 提供一个闭锁致动器用于在接合位置和脱离位置之间驱动钩子。