The road surface you scratch and undo collimating mark of scratching undoing depth of the device

摘要

(57) Abstract Objective The scratching ho where the road surface you scratch and undo and is provided on left and right of the deviceCollimating mark of comb depth, alone worker both easily visualizationThat try it is possible. Constitution The virtual path which possesses the base 6a which the road surface imagines substantiallySurface configuration component 6, the component 4c which moves with side cover 3 as one unitIt is provided in lower part. The bar 7 which possesses the graduation and peak 1Possesses 0a concatenates with the plumb bob 10 which with flexibility body 11 the body which,Becoming machine casing 2 as one unit, depending upon the component 8 which outer fitting is done in bar 7 motionIt is provided on top of ku component 9. As for base 6a, side coverAttendant upon the ascent and descent of 3, from worker it is on opposite side of this deviceIt goes up and down inside the range of visual possible height. At the time scratching to undo,If scratching undoing depth is containment according to set value, the plumb bobContact with the destal 10a and base 6a exactly and it is too deep, yesScratch body 11 deflects and it is too shallow, peak 10a and base 6aIt leaves.