| 摘要 |
PURPOSE:To prevent the abrasion and damage of a groove or a screw roll by stabilizing the feeding of a printing head, by reducing the area of a groove crossing point by forming the inner surface configurations of grooves provided to a lead screw into a V-shape. CONSTITUTION:Grooves 2 of a forward path 2a and a backward path 2b, each of which has a V-shape, that is, a shape wherein both inner wall surfaces are made tapered toward the bottom surface thereof from the opening upper end thereof, are spirally provided to the outer periphery of a lead screw 1 by drilling while a screw block 3, of which the outer shape is formed into a V-shape so as to correspond to the aforementioned grooves 2, is inlaid with the grooves 2 to constitute a printing head transfer apparatus. By rotating the aforementioned lead screw 1 of this apparatus to reciprocally move the aforementioned screw black 3, the abrasion and damage of the grooves and the screw block are prevented and the feeding of a printing head is made stable. |
