| 摘要 |
PURPOSE: A sap apparatus is provided to enable a user to actively cope with a blocking phenomenon by detecting blocking of an outlet part of a sap tube. CONSTITUTION: A sap apparatus comprises a main body(10), a door(20), an operation member(62), an elastic member, a displacement detector(65), and a controller. The operation member is installed to face a closed door around an outlet of a sap tube and moves to one side of outlet of the sap tube when moving forward. The elastic member gives the elastic force so that the operation member can approach the outlet of the sap tube. The displacement detector detects whether the operation member retreats or not. The controller determines whether the sap tube is blocked or not according to the detection result from the displacement detector.
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