| 摘要 |
A vertical conveyor comprising an upstanding support including spaced-apart, horizontally spaced, vertically disposed side frame members. A platform for supporting the object to be conveyed is positioned between the frame members and is vertically movable thereon from a lowermost position to an uppermost position. A first elongated power cylinder is mounted on the support adjacent one of the frame members and is substantially vertically disposed. A piston is positioned within the first power cylinder and has cables secured thereto which extend outwardly from opposite ends of the cylinder. The cables are connected to the upper and lower portions of the platform so that downward movement of the piston in the first power cylinder will cause the platform to be vertically moved upwardly and so that upward movement of the piston in the first power cylinder will cause the platform to be vertically moved downwardly. A first limit switch is mounted on the support and is engaged by the object when the object has been placed on the platform while the platform is in its lowermost position. Actuation of the first limit switch causes the first power cylinder to be actuated so that the platform is raised from the said lowermost position to the said uppermost position. A horizontally disposed second power cylinder is mounted on the support adjacent the upper end thereof and has a push-off rod movably mounted therein which is movable from a retracted position to an extended position. The push-off rod pushes the object on the platform onto a discharge conveyor when the platform has been raised to its uppermost position. A second limit switch is mounted on the support and is closed when the platform reaches its uppermost position to actuate the second power cylinder so that the object is pushed from the platform onto the discharge conveyor. A third limit switch is positioned on the discharge conveyor and is closed by the object as the object passes thereover so that the push-off rod of the second power cylinder is retracted. The object then engages a fourth limit switch which causes the first power cylinder to be reversed so that the platform is lowered to its lowermost position so as to be able to receive another object thereon for the next cycle.
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