| 摘要 |
PURPOSE: An anchor for bedrock is provided to prevent a cement structure from sagging and to easily fix the anchor to bedrock even if the surface of the bedrock is uneven. CONSTITUTION: An anchor for bedrock is composed as follows. A shaft rod(10) with an adjusting bolt unit(10a), a working surface unit(10b), and a hanging protrusion is formed. A fixture(16) with an adjusting nut hole(16a) is assembled in the adjusting bolt unit. Multiple expanded wings(20) with rear saw-teeth units(22) are formed in the fixture. When the shaft rod is rotated, the expanded wings connected to the fixture are expanded.
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