Expandable drum including adjustable stops for setting drum circumference
AssigneeSumitomo Rubber Industries, Ltd.
InventorKenichi Masuda
Life of this patent
Estimating the term…
Abstract
Apparatus for forming an annular product features in such arrangement that, around a drum shaft sheathing over a main shaft, tapering structures each having axial slidability are provided, and in response to a slide move of the tapering structure, drum segments are each radially expanded or retracted. A stopper for controlling a slide move of the tapering structure is provided and an axial position of the stopper is regulated by a motor through a ball screw mechanism disposed in the main shaft. Thereby, settings and changes of a circumferential length of the drum which determines the length of the annular product are easily made and can be made with great certainty.
Claims10
An apparatus for forming an annular product comprising:
- a sleeve main shaft which is fixed and nonrotatable;
- a drum shaft on the main shaft, the drum shaft being sheathed over the main shaft and being rotatable relative to the main shaft, the drum shaft having one shaft end adjacent to one end of the main shaft;
- a pair of supporting flanges fixed on an outer face of the one end of the drum shaft, a predetermined axial space being provided between the flanges;
- a tapering structure mounted in the predetermined space between the pair of supporting flanges, the tapering structure being mounted on the drum shaft and being axially slidable thereon;
- a plurality of segment supporters, each interiorly supporting a drum segment and being engaged with an outer face of the tapering structure and with inner faces of both of the flanges of the pair of supporting flanges, the segment supporters being radially movable for expanding and retracting;
- first drive means mounted on the drum shaft for moving the tapering structure axially to cause radial movement of the segment supporters and drum segments;
- a stopper mounted on the one end of the drum shaft, the stopper being axially movable, the tapering structure abutting the stopper to stop axial movement of the tapering structure in a first direction;
- a plurality of rods extending from the stopper and terminating beyond the one end of the main shaft;
- a stopper flange fixed to the ends of the plurality of rods extending beyond the one end of the main shaft;
- an adjusting rod fitted on a generally central portion of the stopper flange, the stopper flange being rotatable about the adjusting rod, the adjusting rod extending from the sleeve main shaft and being movable axially relative thereto;
- and
- second drive means mounted on an end of the sleeve main shaft opposite to said one end for moving the adjusting rod axially relative to the sleeve main shaft.
Dependencies are inferred from the claim text.