Sheet material conveying apparatus
AssigneeToyota Boshoku Kabushiki Kaisha
InventorsDaisuke Hiraoka, Masayuki Shirata
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Abstract
A conveying apparatus includes a first roller that is rotational to convey a nonwoven fabric and a second roller that is rotational to convey the nonwoven fabric and is located on the trailing side of the first roller with respect to the conveying direction of the nonwoven fabric. The conveying apparatus includes a noncontact sensor and a controller. The noncontact sensor detects the distance from the nonwoven fabric at a position between the first roller and the second roller. The controller uses the distance detected by the sensor to compute the slack amount of the nonwoven fabric and controls the rotation speed of the second roller, thereby reducing the difference between the computed slack amount and a predetermined target value.
Claims11
A conveying apparatus for conveying a sheet material in a conveying direction, the apparatus comprising:
- a first roller that is rotational to convey the sheet material;
- a second roller that is rotational to convey the sheet material and is located on a trailing side of the first roller with respect to the conveying direction of the sheet material;
- a noncontact sensor that detects a distance from the sheet material at a position between the first roller and the second roller;
- and
- a controller that computes a slack amount of the sheet material using the distance detected by the sensor and controls at least one of a rotation speed of the first roller and a rotation speed of the second roller such that a difference between the computed slack amount and a predetermined target value is reduced, wherein
- the predetermined target value is a function of a distance between the first roller and the second roller, a weight of the sheet material, a tension acting on the sheet material between the first roller and the second roller, and a gravitational acceleration.
Dependencies are inferred from the claim text.