Abstract:
A sample analyzer comprising: a sample dispenser for dispensing a sample into a reaction container; a sample transporter for sequentially transports a plurality of reaction containers along a transporting path; a processing station including a plurality of processing sections and a transferring section that transfers a reaction container between the sample transporter and the processing sections; and a controller is disclosed. The sample dispenser sequentially dispenses samples at intervals. The controller alternates the interval when problem occurred at any of the processing sections.

Description:
RELATED APPLICATIONS 
     This application claims priority under 35 U.S.C. §119 to Japanese Patent Application No. 2010-229947 filed on Oct. 12, 2010, the entire content of which is hereby incorporated by reference. 
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to a sample analyzer which automatically analyzes a sample such as blood or urine. 
     2. Description of the Related Art 
     In the past, there have been known sample analyzers such as immunoassay apparatuses, biochemical analyzers, blood cell counters, blood coagulation measuring apparatuses, in-urine physical component analyzers and urine qualitative analyzers. 
     An automatic analyzer disclosed in JP laid-open patent application publication H03-183955 is provided with a reaction table which includes a plurality of reaction containers containing specimens (samples) and reagents and is rotated with a predetermined rotation characteristic by a rotation driving section, a specimen dispenser which dispenses a specimen in a reaction container, a reagent dispenser which dispenses a reagent in a reaction container in which a specimen has been dispensed, a stirring section which stirs a specimen and a reagent in a reaction container, a photometric section which measures the concentration of a specimen in a reaction container, and a controller which controls operations of the sections. 
     The automatic analyzer disclosed in H03-183955 is configured as follows. The controller detects a problem and determines which one of the specimen dispenser, the reagent dispenser, and the stirring section relates to the content of the problem. When it is determined that the content of the problem relates to any of the above-described sections, mechanisms other than the reaction table and the section relating to the photometry are stopped, and the operations of the reaction table and the photometric section are continued. Therefore, when a problem occurs, a specimen which has already been stirred is subjected to the photometry and data thereof is obtained. 
     However, in the automatic analyzer disclosed in the above-described Patent Document 1, when a problem occurs in a part of the apparatus, it is impossible to newly dispense and process a sample continuously. 
     SUMMARY OF THE INVENTION 
     A first aspect of the present invention is A sample analyzer comprising: a sample dispenser for dispensing a sample into a reaction container; a sample transporter for sequentially transports a plurality of reaction containers along a transporting path; a processing station including a plurality of processing sections and a transferring section that transfers a reaction container between the sample transporter and the processing sections; and a controller for executing a sample processing operation for a sample, the sample processing operation including: (i) dispensing, by the sample dispenser, the sample into a reaction container; (ii) transporting, by the sample transporter, the dispensed reaction container along the transporting path; (iii) transferring, by the transferring section, the transported reaction container from the sample transporter to any of the processing sections; (iv) carrying out, by the processing section, a process on the sample in the reaction container; and (v) transferring, by the transferring section, the reaction container from the processing section to the sample transporter after completing the process, wherein the controller sequentially initiates the sample processing operations for a plurality of samples at predetermined intervals while continuing the sample processing operation for the other sample, when the controller determines that a problem occurs at any of the processing sections, the controller alternates the interval to continue the sample processing operation by using the processing section other than the processing section where the problem occurred. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a perspective view showing the configuration of a sample analyzer according to an embodiment; 
         FIG. 2  is a plan view showing the configuration of the sample analyzer according to the embodiment; 
         FIG. 3  is a block diagram showing a part of the configuration of a measuring unit; 
         FIG. 4  is a block diagram showing the configuration of a controller of the measuring unit; 
         FIG. 5  is a plan view showing the schematic configuration of a primary B/F separating section; 
         FIG. 6  is a flowchart showing the procedures of the sample analysis of the sample analyzer according to the embodiment; 
         FIG. 7  is a flowchart showing the procedures of a primary B/F separation process; 
         FIG. 8  is a flowchart showing the procedures of a measurement control process; 
         FIG. 9  is a timing chart partially showing an example of a sample measurement schedule; 
         FIG. 10  is a flowchart showing the procedures of a scheduling process; and 
         FIG. 11  is a timing chart partially showing another example of the sample measurement schedule. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Hereinafter, preferred embodiments of the invention will be described with reference to the drawings. 
     [Configuration of Sample Analyzer] 
       FIG. 1  is a perspective view showing the configuration of a sample analyzer according this embodiment, and  FIG. 2  is a plan view of the sample analyzer. A sample analyzer  1  according to this embodiment is an immunoassay apparatus for examining various items such as hepatitis B, hepatitis C, a tumor marker and a thyroid hormone using a sample such as blood. In this sample analyzer  1 , a sample such as blood which is a measurement target and a buffer solution (R 1  reagent) are mixed, and to this mixed liquid, magnetic particles (R 2  reagent) are added which carry a capture antibody which is able to be bound to an antigen included in the sample. The capture antibody and the antigen are bound to each other, and then the magnetic particles are drawn to a magnet (not shown) of a primary B/F (bound free) separating section  11  (see  FIGS. 1 and 2 ) to remove the free antigen. In addition, a labeled antibody (R 3  reagent) is added, and the antigen to which the magnetic particles are bound and the labeled antibody are bound to each other. Then, the bound magnetic particles are drawn to a magnet (not shown) of a secondary B/F separating section  12  to remove the free labeled antibody. Furthermore, a dispersion liquid (R 4  reagent) and a luminescent substrate (R 5  reagent) which emits light in the course of the reaction with the labeled antibody are added, and then the amount of luminescence caused by the reaction of the labeled antibody and the luminescent substrate is measured. Through such a process, the antigen included in the sample which is bound to the labeled antibody is quantitatively measured. 
     As shown in  FIGS. 1 and 2 , this sample analyzer  1  is provided with a measuring unit  2 , a sample transport unit (sampler)  3  which is disposed adjacent to the measuring unit  2 , and an information processing unit  4  which is formed of a personal computer (PC) electrically connected to the measuring unit  2 . 
       FIG. 3  is a block diagram showing a part of the configuration of the measuring unit  2 . The measuring unit  2  is configured to have a sample dispensing arm  5 , an R 1  reagent dispensing arm  6 , an R 2  reagent dispensing arm  7 , an R 3  reagent dispensing arm  8 , a reaction section  9 , a cuvette supply section  10 , the primary B/F separating section  11 , the secondary B/F separating section  12 , a pipette tip supply section  13 , a detecting section  14 , an R 4 /R 5  reagent supply section  15 , a reagent installation section  16 , a discarding section  17 , and a catcher  18 . In addition, as shown in  FIG. 3 , the mechanisms (various dispensing arms, reaction section  9 , reagent installation section  16  and the like) in the measuring unit  2  are controlled by a controller  2   a  provided in the measuring unit  2 . In addition, the sample transport unit  3  is also configured to be controlled by the controller  2   a.    
       FIG. 4  is a block diagram showing the configuration of the controller  2   a  of the measuring unit  2 . As shown in  FIG. 4 , the controller  2   a  is configured to mainly have a CPU  2   b , a ROM  2   c , a RAM  2   d , and a communication interface  2   e . The CPU  2   b  can execute a computer program which is stored in the ROM  2   c  and a computer program which is read out to the RAM  2   d . The ROM  2   c  stores a computer program to be executed in the CPU  2   b , data which is used in the execution of the computer program, and the like. The RAM  2   d  is used in the readout of a computer program which is stored in the ROM  2   c . In addition, the RAM  2   d  is used as a work area of the CPU  2   b  when these computer programs are executed. The communication interface  2   e  is connected to the information processing unit  4  and has a function of transmitting optical information (data of the amount of luminescence caused by the reaction of the labeled antibody and the luminescent substrate) of a sample to the information processing unit  4  and receiving a signal from a controller of the information processing unit  4 . In addition, the communication interface  2   e  has a function of transmitting a command from the CPU  2   b  to drive the sections of the sample transport unit  3  and the measuring unit  2 . 
     The sample transport unit  3  is configured to be able to transport a rack in which a plurality of test tubes containing a sample is placed. In addition, the sample transport unit  3  is configured to transport a test tube containing a sample to a position  1   a  (see  FIG. 2 ) at which the sample is suctioned by the sample dispensing arm  5 . 
     The information processing unit  4  is formed of a computer which is configured to mainly have the controller (not shown) provided with a CPU, a ROM, a RAM, a hard disk and the like, a display section  4   b , and a keyboard  4   c . The information processing unit  4  receives from a user an input of a measurement order, a measurement start instruction, a reagent replacement instruction and the like, and outputs an operation instruction to the measuring unit  2  and the sample transport unit  3  in accordance with the input. In addition, the information processing unit  4  has a function of analyzing measurement data which is obtained by measuring a sample by the measuring unit  2  to obtain a sample analysis result and outputting the analysis result to the display section  4   b.    
     Hereinafter, the configuration of the measuring unit  2  will be described in detail. 
     The cuvette supply section  10  is configured to be able to store a plurality of cuvettes and has a function of sequentially supplying the cuvettes one by one to a table  1   b  in which a sample is dispensed by the sample dispensing arm  5 . In the measuring unit  2 , the mechanisms repeat the same operation for each of continuous turns which are divided at predetermined time intervals (for example, 9 seconds) to perform the sample measurement. The above-described cuvette supply section  10  also supplies one cuvette in one turn, and this is continuously performed to sequentially supply cuvettes one by one. The sample dispensing table  1   b  has a plurality of annular holes in which a cuvette can be held. The sample dispensing table  1   b  receives a supplied cuvette at a cuvette receiving position. The sample dispensing table  1   b  is rotated by a predetermined angle in a counterclockwise direction, and thus an empty cuvette received at the cuvette receiving position is transferred to a position at which a reagent is dispensed by the R 1  reagent dispensing arm  6  and transferred to a position at which a sample dispensed by the sample dispensing arm  5 . The rotation of this sample dispensing table  1   b  by a predetermined angle is performed once in one turn. Accordingly, on the sample dispensing table  1   b , receiving a cuvette (provision of cuvette), dispensing an R 1  reagent in an empty reaction container, and dispensing a sample in the reaction container containing the R 1  reagent dispensed therein are simultaneously performed in parallel. 
     The R 1  reagent dispensing arm  6  is configured to suction an R 1  reagent installed in the reagent installation section  16  and dispense (emit) the suctioned R 1  reagent in a cuvette placed in the sample dispensing table  1   b . In addition, a pipette  6   a  for suctioning and emitting an R 1  reagent is attached to the R 1  reagent dispensing arm  6  as shown in  FIG. 2 . Such an R 1  reagent dispensing arm  6  performs the suction of an R 1  reagent and the dispensing in a cuvette once in one turn. 
     The pipette tip supply section  13  has a function of transporting a plurality of entering pipette tips (not shown) one by one to a position at which a tip is mounted by the sample dispensing arm  5 . A pipette tip is attached to a pipette tip end of the sample dispensing arm  5  at the tip mounting position. Such a pipette tip supply section  13  supplies one pipette tip in one turn. 
     The sample dispensing arm  5  has a function of suctioning a sample in a test tube which is transported to the sample suction position  1   a  by the sample transport unit  3  after the mounting of a pipette tip at the tip mounting position, and dispensing (emitting) the sample in a cuvette in which an R 1  reagent is dispensed by the R 1  reagent dispensing arm  6  at the sample dispensing position. Such a sample dispensing arm  5  performs the suction of one sample and the dispensing in a cuvette in one turn. A catcher  1   c  for transferring a cuvette is provided adjacent to the sample dispensing position. The catcher  1   c  grips a cuvette in which a sample is dispensed on the sample dispensing table  1   b , takes the cuvette from a hole of the sample dispensing table  1   b , and inserts the cuvette in a hole (cuvette installation section  9   a ) of the reaction section  9 . In this manner, the cuvette in which the sample is dispensed is transferred to the reaction section  9  from the sample dispensing table  1   b  by the catcher  1   c.    
     The R 2  reagent dispensing arm  7  has a function of suctioning an R 2  reagent installed in the reagent installation section  16 . In addition, the R 2  reagent dispensing arm  7  is configured to dispense (emit) the suctioned R 2  reagent in a cuvette containing an R 1  reagent and a sample. In addition, a pipette  7   a  for suctioning and emitting an R 2  reagent is attached to the R 2  reagent dispensing arm  7  as shown in  FIG. 2 . Such an R 2  reagent dispensing arm  7  performs the suction of an R 2  reagent and the dispensing in a cuvette once in one turn. 
     As shown in  FIGS. 1 and 2 , the reaction section  9  is formed in a hollow circular shape so as to surround the reagent installation section  16  having a circular shape in plan view. In addition, the reaction section  9  has a plurality of cuvette installation sections  9   a  which are disposed at predetermined intervals along the external form, and the cuvette installation sections  9   a  are formed in a concave shape in the circular shape so that a cuvette can be inserted therethrough. In addition, the reaction section  9  has a function of heating a cuvette set in a cuvette installation section  9   a  to about 42° C. That is, the reagent which is contained in the cuvette is heated to about 42° C. in the reaction section  9 . Accordingly, the reaction of the sample and the various reagents in the cuvette is promoted. In addition, the reaction section  9  is configured to be rotatable in a clockwise direction (direction of the arrow A 1 ) and has a function of moving a cuvette set in the cuvette installation section  9   a  to the respective processing positions at which various processes (dispensing of the reagent and the like) are performed. Such a reaction section  9  turns in the A 1  direction by an angle between two adjacent cuvette installation sections  9   a  in one turn. Since this is continuously performed, the reaction section  9  turns intermittently. 
     The primary B/F separating section  11  is provided to separate (B/F separation) the free antigen and magnetic particles from the specimen in a cuvette.  FIG. 5  is a plan view showing the schematic configuration of the primary B/F separating section  11 . As shown in  FIG. 5 , the primary B/F separating section  11  is provided with a holding section  11   a  which holds a cuvette, a catcher  11   b  which grips and transfers a cuvette held in the reaction section  9  to the holding section  11   a , and a stirring section  11   c  which stirs a cuvette. The holding section  11   a  is provided with four holding holes  110   a ,  110   b ,  110   c , and  110   d  for holding a cuvette which are arranged in a row. The holding section  11   a  is configured to be horizontally movable in a direction (X 1  and X 2  directions in the drawing) perpendicular to the arrangement direction of the holding holes  110   a ,  110   b ,  110   c , and  110   d  by a motor (not shown). In addition, the catcher  11   b  is configured to be oscillable in the horizontal direction and movable in the vertical direction. When a cuvette held in the reaction section  9  reaches a pickup position  9 A, the catcher  11   b  grips and moves the cuvette upward to take the cuvette from the cuvette installation section  9   a  of the reaction section  9 . Furthermore, the catcher  11   b  turns to transfer the gripped cuvette to a position above the empty one of the holding holes  110   a ,  110   b ,  110   c , and  110   d , and is moved downward to insert the cuvette in the holding hole. Thereafter, the catcher  11   b  turns in a direction separating from the cuvette and releases the engagement with the cuvette. In this manner, the cuvette is transferred to the holding section  11   a  from the reaction section  9 . 
     The holding section  11   a  moves in the X 1  direction while holding the cuvette. The stirring section  11   c  is provided on the side of the X 1  direction of the holding section  11   a . In the stirring section  11   c , four stirring mechanisms  111   a ,  111   b ,  111   c , and  111   d  are arranged in parallel. The respective stirring mechanisms  111   a ,  111   b ,  111   c , and  111   d  are configured to be able to grip a cuvette by interposing the cuvette. The stirring mechanisms  111   a ,  111   b ,  111   c , and  111   d  correspond to the holding holes  110   a ,  110   b ,  110   c , and  110   d , respectively, and by moving the holding section  11   a  in the X 1  direction, a cuvette which is held in the holding hole  110   a  is gripped by the stirring mechanism  111   a , a cuvette which is held in the holding hole  110   b  is gripped by the stirring mechanism  111   b , a cuvette which is held in the holding hole  110   c  is gripped by the stirring mechanism  111   c , and a cuvette which is held in the holding hole  110   d  is gripped by the stirring mechanism  111   d . In addition, the stirring section  11   c  is movable in the vertical direction by the power of the motor (not shown). The stirring section  11   c  is moved upward in a state in which the stirring mechanisms  111   a ,  111   b ,  111   c , and  111   d  grip the cuvettes which are stored in the holding holes  110   a ,  110   b ,  110   c , and  110   d , respectively, and thus the cuvettes are taken from the holding holes  110   a ,  110   b ,  110   c , and  110   d . The stirring mechanisms  111   a ,  111   b ,  111   c , and  111   d  are provided with eccentric motors  112   a ,  112   b ,  112   c , and  112   d , respectively (see  FIG. 3 ). The eccentric motors  112   a ,  112   b ,  112   c , and  112   d  are driven in a state in which the cuvettes taken from the holding holes  110   a ,  110   b ,  110   c , and  110   d  are gripped by the stirring mechanisms  111   a ,  111   b ,  11   c , and  111   d . Accordingly, the stirring mechanisms  111   a ,  111   b ,  111   c , and  111   d  vibrate with the cuvettes, and the sample, the R 1  reagent and the R 2  reagent are stirred in the cuvette. 
     After the stirring of the liquids in the cuvettes, the stirring section  11   c  is moved downward and the cuvettes which are gripped by the stirring mechanisms  111   a ,  111   b ,  111   c , and  111   d , respectively, are inserted again in the holding holes  110   a ,  110   b ,  110   c , and  110   d . After the insertion of the cuvettes, the holding section  11   a  moves in the X 2  direction to the position shown in  FIG. 5 . 
     In the state shown in  FIG. 5 , four pipettes which can move in the vertical direction are disposed above the holding holes  110   a ,  110   b ,  110   c , and  110   d , respectively (not shown). These four pipettes are moved downward to be inserted in the cuvettes which are held in the holding holes  110   a ,  110   b ,  110   c , and  110   d , respectively. Magnets (not shown) are attached to inner walls of the holding holes  110   a ,  110   b ,  110   c , and  110   d , respectively, to be disposed one by one on a side surface of each cuvette. The magnetic particles in each cuvette are suctioned (collection of magnetism) by the magnet and only the liquid in the cuvette is suctioned by the pipette. In addition, each pipette is configured to emit a cleaning liquid into the cuvette. The cleaning liquid enters the cuvette and then the holding section  11   a  moves again in the X 1  direction. The cuvettes are lifted by the stirring mechanisms  111   a ,  111   b ,  111   c , and  111   d , the liquids and the magnetic particles in the cuvettes are stirred, and then the cuvettes are set in the holding section  11   a . Again, the magnetic particles (and the antigen and the capture antibody bound to the magnetic particles) are collected and the liquids in the cuvettes are suctioned by the pipettes. The free antigen is removed from the cuvette by repeating such an operation plural times. 
     When the holding section  11   a  moves in the X 2  direction, the cuvette (that is, the cuvette which is initially transferred to the holding section  11   a  from the reaction section  9  among the cuvettes held in the holding holes  110   a ,  110   b ,  110   c , and  110   d ) in which a primary B/F separation process of removing the free antigen has ended is gripped by the catcher  11   b  and then lifted in that state to be taken from the holding hole. Furthermore, the catcher  11   b  turns to transport the gripped cuvette up to above the cuvette installation section  9   a  which is positioned at a return position  9 B of the reaction section  9  and is moved downward to insert the cuvette in the cuvette installation section  9   a . Then, the catcher  11   b  turns in a direction separating from the cuvette and releases the engagement with the cuvette. In this manner, the cuvette is transferred to the reaction section  9  from the holding section  11   a.    
     Such a primary B/F separating section  11  executes the transfer of one cuvette to the holding section  11   a  from the reaction section  9  in one turn, the stirring of liquids and magnetic particles in the cuvettes held in the holding section  11   a , the removal of the liquids in the cuvettes, and the transfer of one cuvette to the reaction section  9  from the holding section  11   a . Each of the holding holes  110   a ,  110   b ,  110   c , and  110   d  correspond to a port for stirring the liquid and the magnetic particles in the cuvette and removing the unnecessary component in the cuvette (primary B/F separation process). In greater detail, the holding hole  110   a  corresponds to a first port, the holding hole  110   b  corresponds to a second port, the holding hole  110   c  corresponds to a third port, and the holding hole  110   d  corresponds to a fourth port. In the creation of a schedule to be described later, a port is assigned for each cuvette, and in the assigned port, the primary B/F separation process is performed with regard to each cuvette. That is, new cuvettes are fed into the holding section  11   a  one by one in one turn, the stirring of the liquid and the magnetic particles and the suction of the liquid by the pipette are performed with respect to one cuvette in the primary B/F separating section  11  during total four turns, and the cuvettes are discharged one by one in one turn from the holding section  11   a . In addition, a cuvette which is transported to the primary B/F separating section  11  is held in an assigned one of the holding holes (ports)  110   a ,  110   b ,  110   c , and  110   d , and is not moved to another holding hole (port) during the four turns in which the cuvette is installed in the primary B/F separating section  11 . That is, one cuvette corresponds to one of the stirring mechanisms  111   a ,  111   b ,  111   c , and  111   d , and the liquid and the magnetic particles in the cuvette are stirred by the stirring mechanism during the four turns. 
     As shown in  FIG. 3 , each of the holding section  11   a , the catcher  11   b , and the stirring section  11   c  of the primary B/F separating section  11  is connected to the controller  2   a  and controlled by the controller  2   a . In addition, the eccentric motors  112   a ,  112   b ,  112   c , and  112   d  which are provided in the respective stirring mechanisms  111   a ,  111   b ,  111   c , and  111   d  of the stirring section  11   c  are connected to the controller  2   a  via driving circuits  113   a ,  113   b ,  113   c , and  113   d , respectively. The driving circuits  113   a ,  113   b ,  113   c , and  113   d  are provided with a switch (not shown) to switch the connection/disconnection between a constant-voltage power supply (not shown) and the eccentric motors  112   a ,  112   b ,  112   c , and  112   d . The controller  2   a  controls ON/OFF of the switches to switch the operation/stop of the eccentric motors  112   a ,  112   b ,  112   c , and  112   d . In addition, the driving circuits  113   a ,  113   b ,  113   c , and  113   d  are provided with disconnection detecting circuits  114   a ,  114   b ,  114   c , and  114   d  for detecting the disconnection of the eccentric motors  112   a ,  112   b ,  112   c , and  112   d , respectively. Each of these disconnection detecting circuits  114   a ,  114   b ,  114   c , and  114   d  has a resistance for disconnection detection which is provided between the constant-voltage power supply and the eccentric motor, and the value of a current flowing to this resistance is output to the controller  2   a . The controller  2   a  receives an output signal of each of the disconnection detecting circuits  114   a ,  114   b ,  114   c , and  114   d  and compares the respective current values with a predetermined reference value. During the driving of the eccentric motors  112   a ,  112   b ,  112   c , and  112   d , a current equal to or greater than the reference value flows to the resistances for disconnection detection, but when disconnection occurs at any of the eccentric motors  112   a ,  112   b ,  112   c , and  112   d , no current flows to the resistance which is connected to the eccentric motor with the disconnection. The controller  2   a  determines that disconnection has occurred when a current value of the resistance for disconnection detection is less than the reference value. 
     The R 3  reagent dispensing arm  8  has a function of suctioning an R 3  reagent installed in the reagent installation section  16 . In addition, the R 3  reagent dispensing arm  8  is configured to, when a cuvette containing a specimen after the B/F separation by the primary B/F separating section  11  is transferred to the reaction section  9  from the primary B/F separating section  11 , dispense (emit) a suctioned R 3  reagent in the cuvette. In addition, as shown in  FIG. 2 , a pipette  8   a  for suctioning and emitting an R 3  reagent is attached to the R 3  reagent dispensing arm  8 . Such an R 3  reagent dispensing arm  8  performs the suction of an R 3  reagent and the dispensing in a cuvette once in one turn. 
     The secondary B/F separating section  12  is configured to transfer a cuvette containing a reagent after the B/F separation by the primary B/F separating section  11  and an R 3  reagent to the secondary B/F separating section  12  from the reaction section  9  by a catcher (not shown), and then to separate the free R 3  reagent (unnecessary component) and the magnetic particles from the specimen in the cuvette. Since the configuration of this secondary B/F separating section  12  is the same as the configuration of the primary B/F separating section  11 , a description thereof will be omitted. 
     The R 4 /R 5  reagent supply section  15  is configured to sequentially dispense an R 4  reagent and an R 5  reagent in a cuvette containing a specimen after the B/F separation by the secondary B/F separating section  12  by a tube (not shown). Such an R 4 /R 5  reagent supply section  15  dispenses an R 4  reagent in one cuvette in one turn and dispenses an R 5  reagent in the cuvette at next one turn. 
     The detecting section  14  is provided to measure the amount of an antigen included in a sample by acquiring the light which is generated during the course of the reaction of a luminescent substrate with a labeled antibody bound to the antigen of the sample which is subjected to a predetermined process by a photo multiplier tube. Such a detecting section  14  measures the amount of the antigen with respect to one sample in one turn. 
     The discarding section  17  is provided with a hole through which a cuvette subjected to the detection by the detecting section enters, and a discarding bag (not shown) containing an entering cuvette. 
     The catcher  18  picks up a cuvette which is positioned at a predetermined pickup position in the reaction section  9  and transfers the cuvette to the detecting section  14 . Furthermore, the catcher  18  picks up a cuvette subjected to the detection by the detecting section and enters the cuvette to the discarding section  17 . 
     [Operation of Sample Analyzer] 
     Next, the operation of the sample analyzer  1  according to this embodiment will be described. 
     &lt;Procedures of Analysis for Each Sample&gt; 
     First, the procedures of the sample analysis will be described. The procedures of the sample analysis of the sample analyzer  1  according to this embodiment do not differ depending on measurement items (hepatitis B, hepatitis C, tumor marker, thyroid hormone and the like) of a sample and all the analyses are performed in accordance with certain procedures. 
       FIG. 6  is a flowchart showing the procedures of the sample analysis of the sample analyzer according to this embodiment. First, by the sample transport unit  3 , a rack in which a plurality of test tubes containing a sample is placed is transported and a test tube containing a sample is positioned at the sample suction position  1   a  (Step S 101 ). In addition to this, one cuvette is supplied from the cuvette supply section  10  (Step S 102 ). This cuvette is placed in the sample dispensing table  1   b  and is positioned at the R 1  reagent dispensing position due to the rotation of the sample dispensing table  1   b  in a counterclockwise direction, and thus an R 1  reagent is dispensed in the cuvette by the R 1  reagent dispensing arm  6  (Step S 103 ). Then, the sample dispensing table  1   b  rotates and the cuvette containing the R 1  reagent dispensed therein is positioned at the sample dispensing position. 
     A pipette tip is supplied from the pipette tip supply section  13  and mounted on the sample dispensing arm  5 . Then, the sample dispensing arm  5  suctions a sample from a test tube positioned at the sample suction position  1   a  and dispenses the sample in the cuvette positioned at the sample dispensing position (Step S 104 ). 
     The cuvette in which the R 1  reagent and the sample are dispensed is transferred to one cuvette installation section  9   a  of the reaction section  9  from the sample dispensing table  1   b  and is transported to an R 2  reagent dispensing position due to the turning of the reaction section  9  in the A 1  direction (Step S 105 ). At this time, since the reaction section  9  turns by a predetermined angle in one turn, the cuvette reaches the R 2  reagent dispensing position for a predetermined R 1  reagent reaction time. When the cuvette reaches the R 2  reagent dispensing position, an R 2  reagent is dispensed in the cuvette by the R 2  reagent dispensing arm  7  (Step S 106 ). When the dispensing of the R 2  reagent ends, the reaction section  9  further turns in the A 1  direction, and thus the cuvette is transported to the above-described pickup position  9 A (Step S 107 ). The cuvette which reaches the pickup position  9 A is transferred to the primary B/F separating section  11  by the catcher  11   b , and the sample which is contained in the cuvette is subjected to the primary B/F separation (Step S 108 ). 
     The cuvette in which the primary B/F separation has ended is transferred to the cuvette installation section  9   a  at the above-described return position  9 B of the reaction section  9  by the catcher  11   b , and is transported to an R 3  reagent dispensing position due to the turning of the reaction section  9  in the A 1  direction (Step S 109 ). When the cuvette reaches the R 3  reagent dispensing position, the R 3  reagent dispensing arm  8  dispenses an R 3  reagent in the cuvette (Step S 110 ). When the dispensing of the R 3  reagent ends, by the reaction section  9  further turning in the A 1  direction, the cuvette is transported to a cuvette pickup position  9 C for the secondary B/F separation (Step S 111 ). The cuvette which reaches the pickup position  9 C is transferred to the secondary B/F separating section  12  by the catcher of the secondary B/F separating section  12 , and the sample which is contained in the cuvette is subjected to the secondary B/F separation (Step S 112 ). 
     The cuvette in which the secondary B/F separation has ended is transferred to the cuvette installation section  9   a  at a predetermined return position  9 D of the reaction section  9  by the catcher of the secondary B/F separating section  12 . Then, the cuvette is transported to a cuvette pickup position for R 4 /R 5  reagent supply due to the turning of the reaction section  9  in the A 1  direction (Step S 113 ). When the cuvette reaches the cuvette pickup position, the cuvette is transferred to the R 4 /R 5  reagent supply section  15  by a catcher (not shown), an R 4  reagent is dispensed therein (Step S 114 ), and further an R 5  reagent is dispensed therein (Step S 115 ). 
     When the dispensing of the R 4 /R 5  reagents ends, the cuvette is transferred to the cuvette installation section  9   a  at the predetermined position in the reaction section  9  from the R 4 /R 5  reagent supply section  15 , and due to the further turning of the reaction section  9  in the A 1  direction, the cuvette is transported to a predetermined pickup position for a predetermined reaction time (Step S 116 ). When the cuvette reaches the pickup position, the cuvette is picked up from the reaction section  9  by the catcher  18  and transferred to the detecting section  14 . The amount of the antigen in the sample is measured by the detecting section  14  (Step S 117 ). The measurement result is transmitted to the information processing unit  4  from the measuring unit  2 , and the information processing unit  4  analyzes the measurement data to generate the sample analysis result. Such a sample analysis result is recorded on the hard disk of the information processing unit  4 . When the detecting process ends, the catcher  18  picks up the cuvette from the detecting section  14  and sets the cuvette in an installation section (not shown). The liquid in the cuvette set in the installation section is suctioned by a drain nozzle (not shown), and the catcher  18  picks up the reaction container from the installation section and enters the reaction container to the discarding section  17  to perform a discarding process (Step S 118 ). In this manner, the sample analysis ends. 
     In this manner, the sample analyzer  1  analyzes the sample by transporting one cuvette (sample) by the reaction section  9  and sequentially processes the sample during the transport. In addition, a plurality of samples are sequentially suctioned for each turn and processed in parallel by delaying the analysis (measurement) start timing. 
     &lt;Primary B/F Separation Process&gt; 
     Next, a process of controlling the primary B/F separating section  11  by the controller  2   a  (primary B/F separation process) will be described in detail. The CPU  2   b  of the controller  2   a  repeatedly executes the primary B/F separation process to be described as follows.  FIG. 7  is a flowchart showing the procedures of the primary B/F separation process. In the primary B/F separation process, first, the CPU  2   b  determines whether a sample (cuvette) which is a target of the primary B/F separation process has reached the pickup position  9 A of the reaction section  9  (Step S 201 ). When the sample does not reach the pickup position  9 A (NO in Step S 201 ), the CPU  2   b  ends the process. 
     In Step S 201 , when the sample reaches the pickup position  9 A (YES in Step S 201 ), the CPU  2   b  controls the catcher  11   b  to transfer the cuvette positioned at the pickup position  9 A to a port which is assigned in advance in the creation of a schedule to be described later (Step S 202 ). That is, in the schedule the cuvette which is assigned to the first port is transferred to the first port, the cuvette which is assigned to the second port is transferred to the second port, the cuvette which is assigned to the third port is transferred to the third port, and the cuvette which is assigned to the fourth port is transferred to the fourth port. 
     Next, the CPU  2   b  moves the holding section  11   a  in the X 1  direction (see  FIG. 5 ) and grips the cuvettes set in the respective ports by the stirring mechanisms  111   a ,  111   b ,  111   c , and  111   d . Then, the CPU  2   b  lifts the stirring mechanisms  111   a ,  111   b ,  111   c , and  111   d  and executes the collection of magnetism of the magnetic particles in the cuvette and the antigen and the capture antibody bound to the magnetic particles, the suction of the unnecessary component, and the cleaning (Step S 203 ). Furthermore, the CPU  2   b  drives the eccentric motors  112   a ,  112   b ,  112   c , and  112   d  to stir the liquid and the magnetic particles in the cuvette (Step S 204 ). 
     Next, the CPU  2   b  determines whether disconnection has occurred at any of the eccentric motors  112   a ,  112   b ,  112   c , and  112   d  (Step S 205 ). When no disconnection occurs at any of the eccentric motors (NO in Step S 205 ), the CPU  2   b  determines whether the primary B/F separation operation (the collection of magnetism of the magnetic particles in the cuvette and the antigen and the capture antibody bound to the magnetic particles, the suction of the unnecessary component, the cleaning, and the stirring) has been executed a predetermined number of times (Step S 206 ). When the primary B/F separation operation is not executed the predetermined number of times (NO in Step S 206 ), the process returns to Step S 203  and the primary B/F separation operation is executed again. When the primary B/F separation operation is executed the predetermined number of times (YES in Step S 206 ), the CPU  2   b  controls the catcher  11   b  and transfers the cuvette, which is initially transferred to the holding section  11   a  from the reaction section  9  among the cuvettes held in the holding section  11   a , to the return position  9 B of the reaction section  9  by the catcher  11   b  (Step S 207 ), and ends the process. 
     On the other hand, when it is determined that disconnection has occurred at any of the eccentric motors  112   a ,  112   b ,  112   c , and  112   d  in Step S 205  (YES in Step S 205 ), the schedule of the cuvette (test) which is assigned to the port where the disconnection of the eccentric motor occurred is made to be an error (Step S 208 ). The CPU  2   b  discards the cuvette which is made to be the error in the schedule without executing the processes (dispensing of reagents, primary B/F separation, secondary B/F separation, detecting process) after it is made to be the error. For example, a cuvette which is made to be an error before reaching the primary B/F separating section passes the pickup position  9 A of the primary B/F separating section  11  without being transferred to the primary B/F separating section  11 . In addition, at the position at which a reagent is dispensed by the R 3  reagent dispensing arm  8 , no R 3  reagent is dispensed and the cuvette passes the reagent dispensing position. Furthermore, the cuvette passes the pickup position  9 C of the secondary B/F separating section  12  without being transferred to the secondary B/F separating section  12 . In addition, no R 4  reagent and R 5  reagent are dispensed and the cuvette passes the respective reagent dispensing positions and reaches a pickup position in the detecting section  14 . The cuvette which reaches the pickup position in the detecting section  14  is picked up by the catcher  18  and set in the installation section (not shown) without being transferred to the detecting section  14 . The liquid in the cuvette set in the installation section is suctioned by the drain nozzle (not shown). Then, the cuvette is transferred to the discarding section  17  by the catcher  18  to be discarded. 
     Next, the CPU  2   b  sets the port where the disconnection of the eccentric motor occurred to be unusable (Step S 209 ). This process is performed by storing the information of the unusable port in the RAM  2   d  of the controller  2   a . Furthermore, the CPU  2   b  determines whether there is a usable port, that is, whether all of the first to fourth ports are unusable (Step S 210 ). When there is a usable port in Step S 210  (YES in Step S 210 ), the CPU  2   b  ends the process as is. On the other hand, when there is no usable port (NO in Step S 210 ), the CPU  2   b  stops the processes before the primary B/F separation, that is, the transport of a rack, the supply of a cuvette, the dispensing of an R 1  reagent, the dispensing of a sample, the dispensing of an R 2  reagent, and the primary B/F separation (Step S 211 ), and ends the process. As a result, even when all of the ports are unusable, the processes after the primary B/F separation, that is, the dispensing of an R 3  reagent, the secondary B/F separation process, the dispensing of an R 4  reagent and an R 5  reagent and the detecting process continue. Accordingly, until it is determined that all of the ports of the primary B/F separating section are unusable, a sample in which the primary B/F separation has ended can be analyzed and the waste of a sample is prevented. 
     &lt;Creation of Schedule&gt; 
     Prior to the execution of the sample analysis, a measurement order is registered in the sample analyzer  1 . Sample measurement items are designated by this measurement order. In the sample analyzer  1 , a measurement order can be registered by a user, and a measurement order can also be received from a server device (not shown). That is, when a user registers a measurement order, the user operates the keyboard  4   c  of the information processing unit  4 , and thus the measurement order is input to the sample analyzer  1 . When a measurement order is received from a server device, the user registers a measurement order in the server device in advance. In this embodiment, the measurement order means that one or plural measurement items are designated for each of the samples and the sample analyzer  1  is instructed to measure the designated measurement items. Accordingly, one measurement order is input for one sample, and one or plural measurement items are included in one measurement order. 
     When a measurement order is registered by a user or a server device, the registered measurement order is stored on the hard disk of the information processing unit  4 . In addition, the information processing unit  4  transmits the registered measurement order to the measuring unit  2 . The CPU  2   b  of the controller  2   a  stores the received measurement order in the RAM  2   d.    
     The measurement order can be registered before or after the information processing unit  4  receives a measurement start instruction from a user. When a user gives a measurement start instruction to the information processing unit  4 , a command for starting a sample measurement operation is output to the measuring unit  2  from the information processing unit  4 . When receiving this command, the CPU  2   b  starts a measurement control process to be described as follows. 
       FIG. 8  is a flowchart showing the procedures of the measurement control process of the controller  2   a . First, the CPU  2   b  determines whether a measurement order (new measurement order) related to an unexecuted sample measurement is stored in the RAM  2   d  (Step S 301 ). When the new measurement order is not stored in the RAM  2   d  (NO in Step S 301 ), the CPU  2   b  ends the process. On the other hand, when the new measurement order is stored in the RAM  2   d  (YES in Step S 301 ), the CPU  2   b  executes a scheduling process to create a sample measurement schedule (Step S 302 ). The scheduling process will be described later in detail. 
     Next, the CPU  2   b  controls the mechanisms of the measuring unit  2  and the sample transport unit  3  and starts the sample measurement (Step S 303 ). Accordingly, each sample is measured in accordance with the above-described sample analysis procedures. 
     The CPU  2   b  determines whether the sample measurement is executed (Step S 304 ). In some cases, a new measurement order is registered during the sample measurement. Accordingly, when the sample measurement is executed (YES in Step S 304 ), the CPU  2   b  determines again whether a new measurement order is stored in the RAM  2   d  (Step S 305 ). When the new measurement order is stored in the RAM  2   d  (YES in Step S 305 ), the CPU  2   b  executes the scheduling process again on the basis of the added new measurement order (Step S 306 ), and returns the process to Step S 304 . On the other hand, in Step S 305 , when no new measurement order is stored in the RAM  2   d  (NO in Step S 305 ), the CPU  2   b  returns the process to Step S 304  as is. In addition, in Step S 304 , when the sample measurement is not executed (NO in Step S 304 ), the CPU  2   b  ends the process. 
     Next, the creation of a sample measurement schedule will be described in detail. In the scheduling process, a sample measurement schedule is created on the basis of the measurement order.  FIG. 9  is a timing chart partially showing an example of a sample measurement schedule. As shown in  FIG. 9 , the sample measurement schedule is created by assigning operations to be executed for each of continuous turns which are divided at predetermined time intervals (for example, 9 seconds). In the example of  FIG. 9 , with regard to Sample No.  1 , an instruction is made to measure measurement items a and b. In the measurement (test) of the measurement item a in Sample No.  1 , the supply of a cuvette in the first turn, the dispensing of an R 1  reagent in the second turn, the dispensing of a sample (process of suctioning the sample from a test tube and dispensing the sample in the cuvette) in the third turn, the transport of the cuvette in the fourth to sixth turns, the dispensing of an R 2  reagent in the seventh turn, the transport of the cuvette in the eighth and ninth turns, the primary B/F separation in the first port in the 10th to 13th turns, the transport of the cuvette in the 14th turn, the dispensing of an R 3  reagent in the 15th turn, the transport of the cuvette in the 16th and 17th turns, the secondary B/F separation in the first port in the 18th to 21st turns, the transport of the cuvette in the 22nd turn, the dispensing of an R 4  reagent in the 23rd turn, the dispensing of an R 5  reagent in the 24th turn, the transport of the cuvette in the 25th and 26th turns, the photometry (measurement of the antigen amount) in the 27th turn, and the discarding of the cuvette in the 28th turn are planned. In addition, in the test of the measurement item b in Sample No.  1 , the supply of a cuvette is planned in the second turn, and subsequently, the same processes as in the test of the measurement item a are continuously planned in the same procedures. That is, with regard to the test of the measurement item b of Sample No.  1 , the same schedule as that of the test of the measurement item a is due to be delayed by one turn. 
     In addition, with regard to Sample No.  2 , an instruction is made to measure the measurement a. With regard to Sample No.  3 , an instruction is made to test a measurement item c, and with regard to Sample No.  4 , an instruction is made to test the measurement items a, b, and c. Similarly, instructions are made to test the measurement item c with regard to Sample No.  5 , test the measurement item b with regard to Sample Nos.  6  and  7 , test the measurement items a and c with regard to Sample No.  8 , test the measurement a with regard to Sample No.  9 , test the measurement item c with regard to Sample No.  10 , test the measurement item b with regard to Sample Nos.  11  and  12 , and test the measurement item c with regard to Sample No.  13 . The schedule is created for each test and each of the schedules has the same processes as those in the test of the sample measurement a of Sample No.  1  in the same sequence. In addition, the schedules of these tests are created so that the respective tests are delayed by one turn. 
     The scheduling process of creating a schedule of the above-described sample measurement by the controller  2   a  will be described as follows.  FIG. 10  is a flowchart showing the procedures of the scheduling process. In the scheduling process, first, the CPU  2   b  performs the initial setting of the number of turns and the port number (Step S 401 ). In this process, in the case of an initial scheduling process after the start-up of the measuring unit  2 , 1 is set (selected) as the number of turns and 1 is set (selected) as the port number as initial values. In addition, when the second and subsequent scheduling processes are started, the initial values of the number of turns and the port number are not used, but the next number of turns and the next port number of the number of turns and the port number, which are finally selected in the previous scheduling process, are selected. That is, when the number of turns and the port number which are finally selected in the previous scheduling process are “10” and “2”, respectively, “11” and “3” are selected as the number of turns and the port number, respectively, in the execution of initial Step S 401  of the next scheduling process. In addition, the port number is any one of 1 to 4, and Port Nos.  1  to  4  are repeatedly used. That is, when the port number in the previous scheduling process is “4”, the next port number is set to “1”. 
     Next, the CPU  2   b  selects one, for which the schedule is not created, of the measurement items (test) which are included in the new measurement order stored in the RAM  2   d  (Step S 402 ). 
     Next, the CPU  2   b  determines whether there is at least one usable port with regard to each of the primary B/F separating section  11  and the secondary B/F separating section  12  (that is, whether all of the ports are set to be unusable (Step S 403 ). When there is at least one usable port with regard to each of the primary B/F separating section  11  and the secondary B/F separating section  12  (YES in Step S 403 ), the CPU  2   b  determines whether there is a reagent to be used in the selected test (Step S 404 ). When there is a reagent to be used in the selected test (YES in Step S 404 ), it is determined whether the port of a selected number is usable (Step S 405 ). When the port of a selected number is usable (YES in Step S 405 ), the CPU  2   b  creates a schedule of the test so as to start the processes of the test at the selected number of turns, and stores the schedule in the RAM  2   d  (Step S 406 ). 
     Next, the CPU  2   b  determines whether the schedules have been created with regard to all of the tests of the new measurement order stored in the RAM  2   d  (Step S 407 ). Here, when there is a test of which the schedule is not yet created (NO in Step S 407 ), the CPU  2   b  selects the next number of turns and the next port number (Step S 408 ), and advances the process to Step S 402 . On the other hand, when the schedules have been created with regard to all of the tests of the new measurement order (YES in Step S 407 ), the CPU  2   b  returns the process to the call address of the scheduling process in the main routine (measurement control process). In this manner, the processes of Steps S 402  to S 408  are repeated and thus the schedule is created as shown in  FIG. 9 . 
     In Step S 403 , when all of the ports are set to be unusable with regard to any of the primary B/F separating section  11  and the secondary B/F separating section  12  (NO in Step S 403 ), the CPU  2   b  makes all of the tests of the new measurement order be errors (Step S 409 ), and returns the process to the call address of the scheduling process in the main routine (measurement control process). Accordingly, the creation of a new schedule is stopped, and the suction and the dispending of a new sample by the sample dispensing arm are stopped. 
     In addition, in Step S 404 , when there is no reagent to be used in the selected test (NO in Step S 404 ), the CPU  2   b  makes the selected test be an error (Step S 410 ), and determines whether the schedules have been created with regard to all of the tests of the new measurement order stored in the RAM  2   d  (Step S 411 ). Here, when there is a test of which the schedule is not yet created (NO in Step S 411 ), the CPU  2   b  advances the process to Step S 402  as is. On the other hand, when the schedules have been created with regard to all of the tests of the new measurement order (YES in Step S 411 ), the CPU  2   b  returns the process to the call address of the scheduling process in the main routine (measurement control process). 
     In addition, in Step S 405 , when the port of a selected number is unusable (NO in Step S 405 ), the CPU  2   b  selects the next number of turns and the next port number (Step S 412 ), and returns the process to Step S 405 . Accordingly, the ports of the primary B/F separation and the secondary B/F separation are assigned while avoiding the unusable port. 
       FIG. 11  is a timing chart partially showing another example of the sample measurement schedule.  FIG. 11  shows a schedule when the second port of the primary B/F separating section  11  is unusable at the 13th turn in the creation of the schedule shown in  FIG. 9 . At the time when a problem is detected in the second port of the primary B/F separating section  11 , the schedules of the test of the measurement item b of Sample No.  1 , the test of the measurement item b of Sample No.  4 , and the test of the measurement item b of Sample No.  7  are created already as a schedule with the assigned port number “ 2 ”. In addition, at the time when the problem is detected, the primary B/F separation is not completed with regard to these all of the tests. Accordingly, the processes to be executed are not executed after the detection of a problem in these tests. The canceled processes are shown in black in the drawing. 
     In addition, as shown in  FIG. 9 , when no problem occurs at the second port of the primary B/F separating section  11 , a schedule which starts at the turn number “ 14 ” is created with regard to the test of the measurement item c of Sample No.  10 . However, as shown in  FIG. 11 , when a problem occurs at the second port of the primary B/F separating section  11 , a schedule which is delayed by one turn and starts at the turn number “ 15 ” is created with regard to the test of the measurement item c of Sample No.  10 , and “ 3 ” is assigned as the port number of the primary B/F separating section  11 . When the schedule which starts at the turn “ 14 ” is made, the primary B/F separation process of this test is started at the turn  23 , but none of the remaining ports where no problem occurs are available at the turn  23 . Meanwhile, by delaying the turn as described above, the start turn of the primary B/F separation process is the turn  24 . At the turn  24 , the primary B/F separation process of the third port is completed at the last turn  23 , and thus it is possible to start the primary B/F separation process without stopping the cyclic operation of the sample analyzer  1 . 
     Similarly as in the above description, when no problem occurs at the second port of the primary B/F separating section  11 , a schedule which is delayed by one turn and starts at the turn number “ 19 ” is created, not a schedule which starts at the turn number “ 18 ”, with respect to a test of the measurement item c with regard to Sample No.  13 . In addition, in this schedule, “ 3 ” is assigned as the port number of the primary B/F separation section  11 . 
     In this manner, when a problem occurs at the second port of the primary B/F separating section  11 , the timing of the sample dispensing is delayed to make a schedule in which the unusable second port is avoided and the port of the primary B/F separating section  11  is assigned, and thus it is possible to continue the measurement of the sample by using the first, third and fourth ports where no problem occurs. 
     The sample analyzer  1  of this embodiment dispenses a sample in cuvettes at a predetermined cycle, holds the plurality of cuvettes in the reaction section  9 , and operates periodically the sections such as the reaction section  9  and the primary B/F separating section  11  to react the sample and reagents for a predetermined reaction time. In the case in which a problem occurs at any of the four ports of the primary B/F separating section  11 , when a sample is dispensed at the same cycle as that before the occurrence of the problem, the primary B/F separation process should be performed only with the remaining ports where no problem occurs and there is a shortage of ports to perform the primary B/F separation process of all of the samples, whereby it is necessary to wait for the in-use ports to be available. When waiting for the port to be available, there is a need to stop the cyclic operation of the reaction section  9 , and in accordance with the cuvette, the reaction time becomes longer than a predetermined time. In this embodiment, the sample dispensing timing is alternated in order to continue the sample processing by using the remaining ports where no problem occurs, and thus there is no need to wait for the port where no problem occurs to be available and it is possible to continue the sample processing with regard to a cuvette during the reaction in the apparatus without affecting the predetermined reaction time. 
     In the example shown in  FIG. 11 , the sample dispensing is paused once at turn  16  and is then performed at the three continuous turns  17  to  19 . The sample dispensing is paused again at the turn  20  and is performed at the continuous three turns. In this manner, when a problem occurs at only one of the four ports, a series of operations are repeated in which the sample dispensing is paused for only one turn and is then performed continuously for three turns. Here, when a problem occurs at two ports which are continuously used (ports  1  and  2 , ports  2  and  3 , ports  3  and  4 , or ports  4  and  1 ) among the four ports, a series of operations are repeated in which the sample dispensing is paused at the continuous two turns and is then performed at the continuous two turns. In this manner, the sample is dispensed for each turn in a state in which no problem occurs, but when a problem occurs at plural ports which are continuously used, the pause of the sample dispensing at the turn number corresponding to the number of the ports where the problem occurred and the sample dispensing at the turn number corresponding to the number of the ports where no problem occurs are repeatedly performed. 
     As described above, when no problem occurs in any of the ports of the primary B/F separating section  11 , the sample dispensing operation which is performed continuously the same four times as the number of the ports is set to one cycle, and this cycle is repeated. When a problem occurs at one port, one operation is paused among the four sample dispensing operations. In addition, when a problem occurs at two ports, two operations are paused among the four sample dispensing operations, and when a problem occurs at three ports, three operations are paused among the four sample dispensing operations. That is, the sample is dispensed four times in one cycle when no problem occurs, and thus when a problem occurs, the operations of the same number as the number of ports where the problem occurred are paused among the four sample dispensing operations of the same number as the number of the ports. In this manner, it is possible to continue the sample processing without affecting the predetermined reaction time. 
     Although not shown in  FIG. 11 , the port number  2  of the secondary B/F separating section  12  is used in the secondary B/F separation of Sample No.  11 , the port number  3  of the secondary B/F separating section  12  is used in the secondary B/F separation of Sample No.  12 , and the port number  4  of the secondary B/F separating section  12  is used in the secondary B/F separation of Sample No.  13 . That is, with regard to a test in which the port number of the secondary B/F separating section  12  is already assigned at the time of the occurrence of a problem at the turn  13 , the port number which is already assigned is used to continue the measurement. With regard to a test in which the port number of the secondary B/F separating section  12  is assigned after the occurrence of a problem at the turn  13 , there is no need for the port number of the secondary B/F separating section  12  to be assigned corresponding to the port number of the primary B/F separating section  11 , and thus with regard to these tests, the port number of the secondary B/F separating section  12  is sequentially assigned among 1 to 4. 
     Due to the above-described configuration, the invention is advantageous in the following case. Assuming that a problem occurs at the port number  2  of the primary B/F separating section  11  and a problem occurs at the port number  3  of the secondary B/F separating section  12 , when it is necessary to assign the same port number to the respective primary B/F separating section  11  and secondary B/F separating section  12 , only two combinations, that is a combination of the port number  1  of the primary B/F separating section  11  and the port number  1  of the secondary B/F separating section  12  and a combination of the port number  4  of the primary B/F separating section  11  and the port number  4  of the secondary B/F separating section  12  remain. That is, the port number  3  of the primary B/F separating section  11  and the port number  2  of the secondary B/F separating section  12  are not used even when no problem occurs therein. Accordingly, the processing performance of each of the B/F separating sections is reduced to only ¾, but the entire processing performance is reduced to ½. Meanwhile, when it is permitted to assign different port numbers to the respective primary B/F separating section  11  and secondary B/F separating section  12 , it is possible to use all of the three ports, where no problem occurs, of the B/F separating sections. As a result, the processing performance can be kept to ¾ and a reduction in the processing performance can be minimized. 
     Due to the above-described configuration, even when a problem occurs at any stirring mechanism of the primary B/F separating section  11  and the secondary B/F separating section  12 , a mixture in a reaction container can be stirred by using a stirring mechanism other than the stirring mechanism where the problem occurred. Accordingly, even after the occurrence of the above-described problem, a new sample can be dispensed and the sample can be continuously analyzed. In addition, due to the configuration in which with regard to the respective ports, the same B/F separation process is executed by being delayed by one turn in the primary B/F separating section  11  and the secondary B/F separating section  12 , the controller  2   a  may execute a control program for executing the B/F separation process by being delayed by one turn with regard to the respective ports, and the structure of the control program for the primary B/F separating section  11  and the secondary B/F separating section  12  can be simplified. Furthermore, in the case in which any port of the primary B/F separating section  11  or the secondary B/F separating section  12  is made to be unusable due to a problem, two turns are simply delayed and the above-described control program is executed when avoiding the unusable port, whereby there is no need to separately provide a control program for when a problem occurs, and the program development man-hours and costs can be suppressed. Furthermore, according to the above-described configuration, a cuvette other than a cuvette which is due to be processed in a stirring mechanism where a problem occurred among cuvettes disposed at the upper stream side than the B/F separating section where a problem occurred can be stirred in accordance with the plan, and thus the measurement can be continued. Accordingly, in comparison to the conventional technique in which all of cuvettes disposed at the upper stream side than the B/F separating section where a problem occurred are discarded, a waste of sample and reagent when a problem occurs at the B/F separating section can be significantly reduced. 
     (Other Embodiments) 
     In the above-described embodiments, the configuration has been described in which the controller  2   a  of the measuring unit  2  controls the mechanisms in the measuring unit  2 , but the invention is not limited thereto. A configuration may be provided in which the information processing unit  4  of the sample analyzer  1  may perform a process of controlling the above-described mechanisms. 
     In addition, in the above-described embodiments, the configuration has been described in which when a problem occurs at a port of the primary B/F separating section  11  or the secondary B/F separating section  12 , the processing steps to be executed after the occurrence of the problem are stopped with regard to a test having a schedule in which the port is already assigned at the time of the detection of the problem, but the invention is not limited thereto. A configuration may be provided in which when a problem is detected, schedules are created again so as not to use a port where the problem occurred with regard to a plurality of tests including a test having a schedule in which the port is already assigned, and the sample measurement is executed according to the newly created schedules. 
     In addition, in the above-described embodiments, the configuration has been described in which in the primary B/F separating section  11  (secondary B/F separating section  12 ), the plurality of stirring mechanisms  111   a ,  111   b ,  111   c , and  111   d  performing the same process (stirring) are provided to execute a stirring process by the stirring mechanisms where no problem occurs when a problem occurs at some of the stirring mechanisms, but the invention is not limited thereto. A configuration may be provided in which when mechanisms other than the stirring mechanisms, for example, a plurality of R 1  reagent dispensing arms are provided and no problem occurs in any of the R 1  reagent dispensing arms, a process of dispensing an R 1  reagent in one cuvette by one R 1  reagent dispensing arm and a process of dispensing an R 1  reagent in another cuvette by another R 1  reagent dispensing arm are executed in a duplicate manner, and when a problem occurs at one R 1  reagent dispensing arm, another dispensing arm executes the subsequent R 1  reagent dispensing process. 
     In addition, in the above-described embodiments, the configuration has been shown in which a cuvette in which an R 1  reagent and a sample are dispensed is transferred to the reaction section, but the invention is not limited thereto. For example, a configuration may be provided in which an empty cuvette is set in the reaction section and an R 1  reagent and a sample are dispensed therein. 
     In addition, in the above-described embodiments, the configuration has been described in which the sample analyzer  1  is set as an immunoassay apparatus, but the invention is not limited thereto. The sample analyzer may be set as a sample analyzer other than an immunoassay apparatus, such as a blood cell counter, a blood coagulation measuring apparatus, a biochemical analyzer, an in-urine physical component analyzer or a urine qualitative analyzer. However, the sample analyzer is preferably set as a biochemical analyzer or a blood coagulation measuring apparatus which is a sample analyzer having a configuration in which a cuvette is transported by a transporter having a rotation table shape and processes such as the dispensing of a sample and the dispensing of a reagent are executed at a plurality of places on a path on which transporting is carried out by the transporter. 
     In addition, in the above-described embodiments, the example has been shown in which the R 2  reagent dispensing arm  7  has a function of dispensing an R 2  reagent and the R 3  reagent dispensing arm has a function of dispensing an R 3  reagent. However, one multifunctional unit having a function of dispensing an R 2  reagent and an R 3  reagent may be provided.