| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce the number of parts used, form a hone switch mechanism at low cost, and improve fitting accuracy of a hone plate. SOLUTION: A pair of guide receiving parts 21, 21 on both sides are integrally-formed on a boss plate 9. A hone plate 31 is integrally-formed into a frame shape. A pair of guide parts 37, 37 on both sides are protrudingly- formed on the front side. The respective guide parts 37 are engaged with the respective guide receiving parts 21 through an insulated front spacer 32 to be supported so as to move vertically. The rear part of the hone plate 31 is supported so as to move vertically with a shoulder bolt 35 through an insulated rear spacer 33.</p> |
