| 摘要 |
PROBLEM TO BE SOLVED: To make correctable the falling attitude of a pipette tip accurately in a vertical state by retaining the pipette tip falling inside a guide pipe, to the lower end side of a guide pipe by a trap, and making the pipette tip fall by opening operation. SOLUTION: A trap is provided at the lower end part of a guide pipe 7, and a pipette tip A falling inside is once held by the lower end of the guide pipe 7. The upper end side free ends of working arms 81 crossing in a scissors shape are cross-journalled to a bracket 90 assembled to the guide pipe 7, respectively by fulcrum shafts 92, and a tip shaft of an in-and-out actuating rod 94 of a solenoid 93 is connected to a cross-overlap part by a connecting pin 95. The working arms 91 are thus actuated to open/close. In the case of not applying a current to the solenoid 93, a neck part of the pipette tip A is locked by jaws of locking pieces (y), (y) so as to be temporarily held. In the case of applying a current to the solenoid 93, the actuating rod 94 is pulled up, and the retaining pieces (y), (y) are opened to make the pipette tip A fall straightly into a tip hole of the tip rack below. |
