| 摘要 |
PURPOSE:To prevent the whole printer from falling down even when a main body base provided in an upper position is released to do maintenance work of the printer mechanisms provided in a lower position under the state that a plurality of printer mechanisms are vertically and continuously arranged and respective main body bases are openably connected in succession with hinge mechanisms. CONSTITUTION:An on-off cover 13 is pivotally connected to the outer edge part of the main body base 34 of a printer mechanism provided in the uppermost position with a hinge mechanism 28, and the main body base 34 is pivotally connected to the outer edge part of a lower main body base 33 under the condition that an upper hinge mechanism 28 is positioned inward a lower hinge mechanism 35 so as to make the outward movement of the center or gravity slight even when the main body base 34 is fully separated from the main body base 33 in order to ensure the maintainability of the lower printer mechanism 31. |
