Patent ID: 9126443
Filing Date: 2015-09-08
Classification: B41J,Y10T

Abstract:
1. A liquid jetting apparatus configured to jet a liquid, comprising: a liquid jetting head configured to jet the liquid; a carriage configured to carry the liquid jetting head and to move in a predetermined scanning direction; a plurality of pulleys arranged on a predetermined first plane parallel to the scanning direction, each having an axis extending perpendicular to the first plane, and including at least a first pulley and a second pulley which is arranged to be separated from the first pulley in the scanning direction such that at least one of two external common tangents with the first pulley and the second pulley is parallel to the scanning direction; an endless belt put around the plurality of pulleys to make contact with a circumference of each of the first pulley and the second pulley and, connected to the carriage at a portion of the endless belt positioned on the external common tangent parallel to the scanning direction, which is one of the two external common tangents with the first pulley and the second pulley; a pulley holder having a fixing portion, holding a tension adjusting pulley which is included in the plurality of pulleys and which adjusts a tension applied to the belt, and configured to be movable along the first plane together with the tension adjusting pulley; two plates configured to sandwich the fixing portion therebetween; and a fastening member configured to fix the fixing portion to the two plates, wherein the two plates are configured not to move relative to each other in a direction parallel to a second plane which is perpendicular to a stacking direction of the two plates and the fixing portion; and the fixing portion is fixed to the two plates in a state that the pulley holder is arranged at a position at which a predetermined tension is applied to the belt; wherein the two plates are constructed of: a first plate in which a sliding surface, which is parallel to the scanning direction and guides the carriage in the scanning direction by sliding the carriage thereon, is provided and to which axes of another pulleys other than the tension adjusting pulley among the plurality of pulleys are fixed; and a second plate having a displacement amount, with respect to a force acting in a direction perpendicular to the second plane, which is greater than that of the first plate, and the second plate is curved toward the first plate due to a fastening force of the fastening member, such that the second plate is displaced in the direction perpendicular to the second plane with respect to the sliding surface and the axes of the another pulleys.