| 摘要 |
PURPOSE: A stopper rod is to provide an improved device of stably attaching a stopper rod to a lifting and lowering mechanism. CONSTITUTION: An improved device of attaching a stopper rod to a lifting and lowering mechanism comprises a first sleeve, a connecting rod and a second sleeve. The first sleeve is molded in-situation in the stopper rod body to lie coaxially with the stopper rod body in an annular recess surrounding and coterminous with the bore, and has a pair of circumferential-spaced inwardly-directed, arcuate flanges. The connecting rod is of diameter to fit into the stopper rod bore and of length to extend outside the stopper rod. The connecting rod passes through the first sleeve when the sleeve is in position in the stopper rod, and has a pair of circumferential-spaced, arcuate shoulders of size to pass through the spaces between the flanges of the first sleeve. The second sleeve is of external diameter to fit in the bore of the stopper rod and has at one end a pair of circumferential-spaced, arcuate, axially-extending projections having an internal radius sufficient to accommodate the connecting rod through the second sleeve and being of a size to fit into the spaces between the flanges of the first sleeve.
|
