Analyzing apparatus in which liquid can be stirred and analyzing method thereof

• US 5,104,807 A
• Filed: 02/16/1989
• Issued: 04/14/1992
• Est. Priority Date: 02/19/1988
• Status: Expired due to Fees

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Mitsumaki, Hiroshi, Takahata, Fujiya
• Primary Examiner(s): KRATZ, PETER F
• Application Number:
  US07/311,272
• Time in Patent Office: 1,153 Days
• Field of Search: 422/63, 422/64, 422/65, 422/67, 422/72, 422/102, 436/45, 436/47, 366/208, 366/218, 366/219, 366/287, 366/288, 494/19
• US Class Current: 436/47
• CPC Class Codes: B01F 29/10 with receptacles rotated about two different axes, e.g. receptacles having planetary motion
• CPC Class Codes: B01F 29/40362 having parallel axes
• CPC Class Codes: B01F 29/40365 arranged for planetary motion
• CPC Class Codes: G01N 2035/00524 Mixing by agitating sample carrier
• CPC Class Codes: G01N 35/02 using a plurality of sample containers moved by a conveyor system past one or more treatment or analysis stations G01N35/0098 and G01N35/0099 take precedence
• CPC Class Codes: G01N 35/025 having a carousel or turntable for reaction cells or cuvettes
• CPC Class Codes: G01N 35/026 having blocks or racks of reaction cells or cuvettes
• CPC Class Codes: Y10T 436/113332 with conveyance of sample along a test line in a container or rack

Abstract

An analyzing apparatus includes a turntable, and a plurality of reaction containers which are arranged on the turntable. This turntable is intermittently rotated so that the train of reaction containers is alternately in a conveyed state and a stopped state. The outer walls of part of the reaction containers in the train of reaction containers are in contact with a fixedly provided friction flange, while the remaining reaction containers in the train of reaction containers is not in contact with the friction flange. Since the reaction containers located in an area where they make contact with the friction flange are conveyed while they are contacting with the friction flange as the turntable is rotated, the motion of the turntable is transmitted to the reaction containers, and the reaction containers are thereby rotated on their own axes so as to allow the reaction liquid in the containers to be stirred. The rotation of the reaction containers on their own axes is stopped when they reach an area where they do not make contact with the friction flange. After the rotation of the reaction liquid in the reaction containers has been substantially stopped, the light measurement of the reaction liquid is performed using a photometer.

Claims

1. An apparatus for analyzing the contents of a plurality of containers, each of said containers having an axis of rotation and an outer periphery, comprising:

means for holding said plurality of containers for accommodating a liquid to be stirred therein about said axis of rotation;

fixed container rotating and non-rotating areas;

drive means for driving said means for holding to move said plurality of containers through said container rotating and non-rotating areas;

transmitting means for transmitting motion of said means for holding caused by said drive means to a rotational force acting on said containers, said transmitting means including fixed flange means in said container rotating area for frictionally engaging said plurality of containers to cause each of said containers to rotate on its said axis in said container rotating area; and

a photometer for irradiating each of said plurality of containers with a light beam in said non-rotating area.

2. An analyzing apparatus according to claim 1, wherein said containers are made of a transparent material, and the outer periphery of each of said containers has irregularities that engage said flange means.

3. An analyzing apparatus according to claim 1, wherein said drive means is a pulse motor for driving said means for holding intermittently.

4. An analyzing apparatus according to claim 1, wherein said flange means engages a plurality of said containers simultaneously.

5. An analyzing apparatus according to claim 1, wherein said flange means has a plurality of surfaces that engage said containers, and wherein said surfaces are alternately disposed on opposite sides of said containers.

6. An analyzing apparatus according to claim 1, further comprising means for controlling said photometer for beginning an irradiating of said containers ten seconds after movement of said containers stops.

7. An analyzing apparatus according to claim 1, further comprising means for controlling said photometer for beginning an irradiating of said containers within two seconds after movement of said containers stops.

8. An analyzing apparatus according to claim 1, wherein said containers have vein shaped fins on an interior portion thereof for stirring.

9. An analyzing apparatus according to claim 2, wherein said containers have vein shaped fins on an interior portion thereof for stirring.

10. An analyzing apparatus according to claim 1, wherein said drive means drives said plurality of containers in only one direction.

11. An analyzing apparatus according to claim 10, wherein said drive means is a pulse motor that intermittently drives said holding means.

12. An analyzing apparatus according to claim 1, wherein said holding means holds said plurality of containers in alignment and said drive means drives said holding means to move said plurality of containers along a circular path.

13. An analyzing apparatus according to claim 1, wherein said holding means holds said plurality of containers in alignment and said drive means drives said holding means to move said plurality of containers along a straight path having opposite sides.

14. An analyzing apparatus according to claim 12, wherein said fixed flange means is arcuate and has a face engaging said plurality of containers along a portion of said circular path.

15. An analyzing apparatus according to claim 14, wherein said flange means is positioned outside said circular path and extends for greater than one-half of said circular path.

16. An analyzing apparatus according to claim 13, wherein said fixed flange means is positioned to engage said containers along one of the sides of the straight path.

17. An analyzing apparatus according to claim 13, wherein said fixed flange means is positioned to alternately engage said containers on both sides of said straight path so that said containers rotate in opposite directions.

18. An analyzing apparatus according to claim 1, wherein said holding means is driven in rotation by said drive means to move said containers in a circular path, and wherein said fixed flange means is an arcuate flange positioned to engage said containers along a portion of said circular path.

19. An analyzing apparatus according to claim 18, wherein said holding means comprises upper and lower discs, said upper disc having through holes with bearings for receiving said containers therein, and said bottom disc having concave portions aligned with said through holes for supporting a bottom portion of said containers.

20. An analyzing apparatus according to claim 18, wherein said flange is positioned outside said circular path.

21. An apparatus for analyzing the contents of a plurality of containers, each container having an outer periphery, comprising:

means for holding a plurality of containers, each of said containers accommodating a liquid therein to be stirred about an axis of rotation of said containers;

means for driving said means for holding to move said containers in a path through fixed rotating and non-rotating areas;

fixed flange means in said container rotating area for frictionally engaging said containers, said holding means supporting said containers for rotation about said container axes, and said driving means being further for driving said containers into engagement with said fixed flange means to rotate said containers about said axes, respectively; and

means for irradiating each of said containers in said non-rotating area.

22. An analyzing apparatus according to claim 21, wherein said holding means holds said containers in a circular array, and wherein said fixed flange means is an arcuate flange positioned to engage said containers as said containers move through said container rotating area.

23. A method for analyzing a plurality of containers, each having an axis of rotation, comprising the steps of:

holding said plurality of containers for accommodating a liquid to be stirred therein about said axis of rotation;

driving said plurality of containers through fixed container rotating and non-rotating areas;

transmitting motion of said plurality of containers caused by said driving to a rotational force acting on said containers by driving said containers into engagement with a fixed flange in said container rotating area to cause each of said containers to rotate on its own said axis in said container rotating area; and

irradiating each of said plurality of containers with a light beam in said non-rotating area.

24. An analyzing apparatus according to claim 23, further comprising the step of ejecting at least one of a sample and a reagent into a container located at a predetermined position while the conveyance of said containers is stopped.