Draft mechanism having roller pairs connected to draft ratio controlled motors by timing belts
AssigneeMurata Kikai Kabushiki Kaisha
InventorsYutaka Ueda, Hideshi Mori, Manzo Tanaka
Life of this patent
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Abstract
A draft mechanism for use on a spinning machine includes a series of roller pairs each including a bottom roller and a top roller. The roller pairs are connected to output shafts of motors through the use of timing belts. The motors are electrically controlled according to the draft ratios. Roller gauge adjusting shafts are meshed with bearing portions of the top and bottom rollers. '
Claims12
A draft mechanism having a series of roller pairs each comprising a bottom roller and a top roller, wherein said roller pairs have respective bottom rollers separately connected to the output shafts of motors through respective timing belts, and said draft mechanism comprises a motor controller having a memory device for storing rotational speeds of the individual motors beforehand and adapted to control the respective motors according to signals supplied from said memory device.
A draft mechanism comprising:
- first and second roller pairs, each roller pair having a bottom roller and a top roller;
- first and second roller drive devices;
- a first flexible connector connecting the first roller drive device to at least one of the top and bottom rollers of the first roller pair;
- a second flexible connector connecting the second roller drive device to at least one of the top and bottom rollers of the second roller pair;
- control means, having a memory device for storing information corresponding to rotational speeds of the first and second roller drive devices, for controlling the first and second roller drive devices according to information stored by the memory device, wherein the first and second flexible connectors comprise first and second belts, respectively.
A draft mechanism comprising:
- first and second roller pairs, each roller pair having a bottom roller and a top roller;
- first and second roller drive devices;
- a first flexible connector connecting the first roller drive device to at least one of the top and bottom rollers of the first roller pair;
- a second flexible connector connecting the second roller drive device to at least one of the top and bottom rollers of the second roller pairs;
- control means, having a memory device for storing information corresponding to rotational speeds of the first and second roller drive devices, for controlling the first and second roller drive devices according to information stored by the memory device;
- and
- adjusting means for adjusting the relative distance between the first roller pair and the second roller pair.
A draft mechanism comprising:
- first and second roller pairs, each roller pair having a bottom roller and a top roller;
- first and second roller drive devices;
- a first flexible connector connecting the first roller drive device to at least one of the top and bottom rollers of the first roller pair;
- a second flexible connector connecting the second roller drive device to at least one of the top and bottom rollers of the second roller pair;
- control means, having a memory device for storing information corresponding to rotational speeds of the first and second roller drive devices, for controlling the first and second roller drive devices according to information stored by the memory device, wherein each of the top and bottom rollers of the first and second roller pairs have a roller shaft provided with a bearing portion, the draft mechanism further comprising:
- a first roller gauge adjusting shaft meshed with the bearing portions of the top rollers of the first and second roller pairs;
- a second roller gauge adjusting shaft meshed with the bearing portions of the bottom rollers of the first and second roller pairs;
- and
- first and second knobs connected to the first and second roller gauge adjusting shafts, respectively, for selectively rotating the first and second roller gauge adjusting shafts to move the bearing portions along the length of the roller gauge adjusting shafts.
A draft mechanism comprising:
- first and second roller pairs, each roller pair having a bottom roller and a top roller;
- first and second roller drive devices;
- a first belt connecting the first roller drive device to at least one of the top and bottom rollers of the first roller pair;
- a second belt connecting the second roller drive device to at least one of the top and bottom rollers of the second roller pair;
- and
- adjusting means for adjusting the relative distance between the first roller pair and the second roller pair.
Dependencies are inferred from the claim text.