| 摘要 |
PROBLEM TO BE SOLVED: To provide a rotary excavating tool for a vertical tool, capable of excavating a cylindrical vertical hole by manually operated pressing rotation without collapsing an excavated wall surface and performing scooping and discharging of waste soil as a series of rotary operations.SOLUTION: In a manually operated cylindrical rotary excavating tool, vertical recessed excavating plates f are circularly arranged at tips of connection arms C radially extending in an umbrella-shape, respectively, with respective recessed faces facing a main shaft e, other ends of the connection arms being movably accumulated at upper and lower supports A, K of the rotary main shaft e, and the circularly arranged excavating plates f are interlocked and rotated following the pressing rotary operation to the main shaft e. A fixed frame B having a fixing lock pin in a bottom part is covered by a triangular composition feature of the connection arms C radially extending from the central support A to enable a circle diameter of excavation to be stepwise adjusted, the tips of the excavating plates f are converged in the inside direction to facilitate pressing capturing of waste soil by approach between the lower supports A, K following release of a fixing function due to a lifting reverse operation of the main shaft e, and work from excavation to waste soil discharge is performed by a series of minor manual rotary operations. |
