Automatic analyzer

• US 7,771,656 B2
• Filed: 01/23/2001
• Issued: 08/10/2010
• Est. Priority Date: 01/23/2001
• Status: Expired due to Term

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Shibuya, Takeshi, Uchida, Hiroyasu, Kambara, Katsuhiro
• Primary Examiner(s): Warden; Jill
• Assistant Examiner(s): TURK, NEIL N
• Application Number:
  US10/466,839
• Publication Number:
  US 20040057872A1
• Time in Patent Office: 3,486 Days
• Field of Search: 422/63, 422/64, 422/65, 436/47, 435/287.3
• US Class Current: 422/64
• CPC Class Codes: G01N 2035/0443 for reagents
• CPC Class Codes: G01N 2035/0455 Coaxial carousels
• CPC Class Codes: G01N 35/025 having a carousel or turntable for reaction cells or cuvettes
• CPC Class Codes: G01N 35/1002 Reagent dispensers
• CPC Class Codes: G01N 35/109 with two horizontal degrees of freedom

Abstract

A reagent dispensing mechanism (15), first and second dispensing-mechanism transfer means (26, 27), and a second reagent vessel (reagent cassette) carrying-in/out mechanism (24), which are constructed by employing an XY-mechanism, are arranged so as to travel above a reagent table (25) to carry in/out a reagent cassette (22). As compared with the case where the reagent cassette carrying-in/out mechanism (24) is installed radially of the reagent table (25), the area of an automatic analyzer in the horizontal direction can be reduced and a reagent vessel (16) can be moved to a predetermined position in a shorter time by combining the rotation of the reagent table (25) with the movement of the XY-mechanism. Further, as compared the case of dispensing reagents from reagent vessels in a matrix pattern by using the reagent dispensing/transferring mechanism, the travel distance of the transferring mechanism can be shortened and so can be the travel time. Thus, an analyzer adaptable as a machine of high processing capability with a shorter cycle time can be constructed.

Claims

1. An automatic analyzer comprising:

a rotatable reagent table on which a plurality of reagent vessels, each holding a reagent, are held, said reagent table including a plurality of annular reagent vessel holders holding said reagent vessels;

an annular reaction table positioned adjacent said rotatable reagent table and holding a plurality of reaction vessels;

a first reagent vessel carrying-in/out mechanism for lifting up one of said reagent vessels positioned at a reagent vessel movement standby position adjacent said one reagent table and for lowering said reagent vessel to a reagent vessel loading position;

a reagent dispensing mechanism for sucking a reagent in from said one reagent vessel and for ejecting the reagent to one of said reaction vessels, said reagent dispensing mechanism being directly mechanically connected to said first reagent vessel carrying-in/out mechanism;

first and second transfer means directly mechanically connected to each other for moving said reagent dispensing mechanism and said first reagent carrying-in/out mechanism in X and Y directions in a horizontal plane through a space above said reagent table;

a control system for controlling operations of said rotatable reagent table, said reagent dispensing mechanism, said first and second transfer means and said first reagent vessel carrying-in/out mechanism; and

a photometer for measuring an absorbance of a solution of a reagent and a sample mixed in said one reaction vessel.

2. The automatic analyzer according to claim 1 further comprising,

a second reagent vessel carrying-in/out mechanism for carrying a reagent vessel placed in a particular position to the reagent vessel movement standby position;

a bar code reader for reading specific information of a reagent indicated on the reagent vessel carried by said second reagent vessel carrying mechanism; and

an information storage section for storing the specific information of the reagent read by said bar code reader;

wherein said control system instructs the carrying-in of the reagent vessel from the reagent vessel movement standby position to the reagent vessel loading position and to said first reagent vessel carrying-in/out mechanism and said first and second transfer means in accordance with the specific information of the reagent.

3. An automatic analyzer according to claim 1, further comprising a display section for displaying movement information of a reagent vessel when the reagent vessel is loaded onto or unloaded from said rotatable reagent table.

4. The automatic analyzer according to claim 1, wherein said annular reagent vessel holders include an inner peripheral side annular reagent vessel holder and a second, separate outer peripheral side annular reagent vessel holder positioned outside of and surrounding said inner peripheral side annular reagent vessel holder, and wherein said control system controls the operation of loading a reagent vessel onto said reagent table such that a reagent vessel is loaded into a vacant area in one of said annular reagent vessel holders on the inner peripheral side annular reagent vessel holder with a priority over a vacant area in said outer peripheral side annular reagent vessel holder.

5. The automatic analyzer according to claim 1, further comprising another reagent dispensing mechanism and wherein said annular reaction table is rotated under control of said control system, and both reagent dispensing mechanisms are controlled such that reagents to be added at different times are added to a reaction vessel during the same period in a rotation cycle in which said annular reaction table is stopped.