| 摘要 |
PURPOSE:To enable fast accessing by preventing restriction on the direction and amount of turning of arms, by interposing a rotary connecting member in pipes imbedded in a horizontal arm and a bottom-up arm to preclude possible twisting of the pipes. CONSTITUTION:Pipes 52a-52c are imbedded into arms 50 at respective straight parts and the pies 52a and 52b and those 52b and 52c are connected together with respective universal joints 52d1 and 52d2, which are arranged at the squarely bent parts of the pipes and the pipes 52a-52c are supported rotatably with a bearing 51. The pipe 52a is connected to a nozzle 53 while the pipe 52c is led out from the bottom of a tilt arm 50b to be connected to a pump 43. Then, the arms 50 are turned in the direction B to get an access to a reagent tray or the like, but a force of twisting the pipes 52a-52c with the rotation of the arms 50 is escaped so as not to let the nozzle 53 and the pipes 52a-52c turn in the direction E and in the direction F thereby preventing the twisting of th pipes 52a-52c. |
