JP2008224538A - Washer and autoanalyzer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To surely wash off dirt within a reaction vessel by positively forming a flow of a washing liquid along inner-wall side surfaces of the reaction vessel. <P>SOLUTION: This washer 20 is equipped with a nozzle part 21 comprising an injection nozzle 211, a suction nozzle 213 with its end situated vertically below an end of the injection nozzle 211, and a regulative member 215 fixed on an outer wall of the suction nozzle 213. The regulative member 215 is a plate-like body with its planar shape having a shape similar to a cross-sectional shape of the reaction vessel C, and is formed so that its outer diameter is slightly smaller than the inner diameter of the reaction vessel C. The regulative member 215 uniformly diffuses wash water injected from the injection nozzle 211 on the respective inner-wall side surfaces of the reaction vessel C while the wash water is let flow thereinto from a gap between the regulative member 215 and the side surfaces of the reaction vessel C. The wash water let flow thereinto is let flow along the side surfaces. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a cleaning device and an automatic analyzer including the cleaning device.

  2. Description of the Related Art Conventionally, there is known an automatic analyzer that analyzes a sample by dispensing a reagent and a sample into a reaction container and optically detecting a reaction that has occurred in the reaction container. Further, a cleaning device that is provided in this automatic analyzer and that cleans a reaction vessel that has been analyzed is known (see Patent Document 1). According to the technique of Patent Document 1, the reaction vessel used for the analysis can be washed each time and used repeatedly.

JP-A-62-2228951

  However, in the technique of Patent Document 1, the cleaning liquid is difficult to diffuse inside the reaction vessel. Therefore, it was not possible to form a flow of cleaning liquid sufficient to remove the dirt adhering to the inner wall side surface of the reaction vessel along the inner wall side surface of the reaction vessel. For this reason, there was a problem that the dirt adhering to the inner wall side surface of the reaction vessel could not be removed, and the inside of the reaction vessel could not be washed away sufficiently.

  The present invention has been made in view of the above-described conventional problems, and is capable of positively forming a flow of a cleaning liquid along the inner wall side surface of the reaction vessel and reliably washing dirt inside the reaction vessel. An object is to provide an apparatus and an automatic analyzer.

  In order to solve the above-described problems and achieve the object, a cleaning device according to the present invention is a cleaning device that cleans the inside of a container. An injection nozzle for injecting the liquid into the container, and a suction nozzle for sucking the liquid injected into the container by the injection nozzle from the front end, the front end being disposed inside the container vertically below the front end of the injection nozzle And a limiting member that is disposed between the tip of the injection nozzle and the tip of the suction nozzle and limits the flow of the liquid injected by the injection nozzle to a flow along the inner wall side surface of the container. It is characterized by.

  Further, the cleaning device according to the present invention controls the suction start timing by the suction nozzle and the injection start timing by the injection nozzle in the above invention, and suction by the suction nozzle is more effective than injection by the injection nozzle. It has a timing control means for starting first.

  The cleaning device according to the present invention is characterized in that, in the above-mentioned invention, the cleaning device has suction force control means for causing the suction nozzle to suck the liquid with a force more than the injection of the liquid by the injection nozzle.

  Moreover, the cleaning apparatus according to the present invention is characterized in that, in the above invention, the limiting member is disposed vertically above the liquid level of the liquid held inside the container before cleaning.

  In the cleaning device according to the present invention, in the above invention, the limiting member has a cross-sectional area smaller than a cross-sectional area of the internal space of the container, and a cross-sectional shape is similar to the cross-sectional shape of the internal space of the container. It is characterized by that.

  Moreover, the automatic analyzer according to the present invention is characterized by having the cleaning device having the above-described configuration.

  According to the present invention, the flow of the liquid that cleans the inside of the container injected from the injection nozzle into the container by the limiting member is limited to the flow along the inner wall side surface of the container, and the tip is perpendicular to the tip of the injection nozzle. The injected liquid can be sucked by the suction nozzle disposed below. Therefore, since the flow of the liquid along the inner wall side surface of the container can be positively formed, the dirt adhering to the inner wall side surface of the container can be sufficiently washed away, and the inner dirt can be reliably washed.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a schematic diagram showing a configuration of an automatic analyzer 1 according to the present embodiment. As shown in FIG. 1, the automatic analyzer 1 is an apparatus that automatically performs biochemical, immunological, or genetic analysis of a plurality of specimens. And a measuring mechanism 2 for optically measuring the reaction occurring in the dispensed reaction vessel C. The measurement mechanism 2 includes a sample transport mechanism 11, a sample dispensing mechanism 12, a reaction table 13, a reagent storage 14, a reading device 16, a reagent dispensing mechanism 17, a stirring device 18, and a measurement optical system 19. And a cleaning device 20.

  The sample transport mechanism 11 includes a plurality of sample racks 11b that hold a plurality of sample containers 11a containing samples such as blood and urine and sequentially transport them in the direction of the arrows in the figure. The sample in the sample container 11a that has been transported to a predetermined sample suction position on the sample transport mechanism 11 is dispensed by the sample dispensing mechanism 12 into the reaction container C that is arranged and transported on the reaction table 13.

  The sample dispensing mechanism 12 includes an arm 12a that freely moves up and down in the vertical direction and rotates around a vertical line passing through its base end as a central axis, and performs suction and discharge of the sample on the arm 12a. A probe is attached and configured. The sample dispensing mechanism 12 aspirates the sample from the sample container 11a that has been transported to the sample suction position on the sample transport mechanism 11 with the probe. Then, the arm 12a is rotated, and the sample is discharged into the reaction container C conveyed to the sample discharge position on the reaction table 13 to perform dispensing. The probe of the specimen dispensing mechanism 12 is flushed and washed in a washing tank (not shown) to which washing water is supplied after dispensing is completed.

  In the reaction table 13, a plurality of reaction containers C into which samples and reagents are dispensed are arranged. The reaction table 13 is configured to be rotatable about the center of the reaction table 13 as a rotation axis by a drive mechanism (not shown) under the control of the control unit 3. The reaction container C is transported to each of a discharge position, a stirring position, a photometric position, and a predetermined position below the cleaning device 20. The reaction table 13 is covered with a disk-shaped lid (not shown). In addition, a thermostat (not shown) is provided below the reaction table 13, and together with a cover that covers the inside, constitutes a heat insulating tank that keeps the internal temperature at a temperature of about body temperature.

  The reagent store 14 stores a plurality of reagent containers B each storing a predetermined reagent corresponding to the analysis item. The reagent storage 14 is configured to be rotatable about a rotation axis by a drive mechanism (not shown) under the control of the control unit 3, and transports a desired reagent container B to a predetermined reagent suction position. To do. The reagent store 14 is covered with a disk-shaped lid (not shown). In addition, a thermostat (not shown) is provided below the reagent cabinet 14, and together with a lid that covers the inside, configures a cold storage cabinet that keeps the reagents contained in each reagent container B in a constant temperature state. Thereby, evaporation and denaturation of the reagent can be suppressed.

  A reading device 16 is disposed on the outer peripheral side of the reagent storage 14. The reading device 16 is, for example, a barcode reader, and acquires reagent information by reading a barcode (not shown) attached to the reagent container B accommodated in the reagent storage 14. The barcode attached to the reagent container B is obtained by coding the reagent information related to the reagent contained in the reagent container B according to a predetermined standard. Examples of the reagent information include the reagent name, lot number, and valid Information such as the deadline is included as appropriate. Based on the reagent information acquired by the reading device 16, the reagent in the reagent container B is recognized and selected.

  The reagent dispensing mechanism 17 has the same operation and configuration as the sample dispensing mechanism 12, and includes an arm 17a to which a probe for aspirating and discharging the reagent is attached. The arm 17a freely moves up and down in the vertical direction and rotates around a vertical line passing through its proximal end as a central axis. The reagent dispensing mechanism 17 sucks the reagent in the reagent container B transported to the reagent suction position on the reagent storage 14 with the probe. Then, the arm 17a is rotated, and the reagent is discharged into the reaction container C transported to the reagent discharge position on the reaction table 13 to perform dispensing. The probe of the reagent dispensing mechanism 17 is flushed and washed in a washing tank (not shown) to which washing water is supplied after dispensing.

  The stirrer 18 stirs the sample and the reagent dispensed in the reaction vessel C transported to the stirring position with a stirring rod (not shown) to promote the reaction. After the stirring is completed, the stirring rod is washed and washed with a cleaning tank (not shown) to which cleaning water is supplied.

  The measurement optical system 19 irradiates the reaction container C transported to the photometry position with light, receives the light transmitted through the reaction liquid in the reaction container C, and measures the intensity. The measurement result by the measurement optical system 19 is output to the control unit 3 and analyzed by the analysis unit 31.

  The cleaning device 20 suctions and discharges the reaction solution in the reaction vessel C, with the reaction vessel C transported to a predetermined position below the device after measurement by the measurement optical system 19 being cleaned, The reaction container C is cleaned by supplying and sucking a cleaning liquid such as cleaning water. In the present embodiment, the cleaning device 20 is described as cleaning the inside of the reaction container C by supplying and sucking cleaning water. The reaction vessel C washed here is again dispensed with the sample by the probe of the sample dispensing mechanism 12 and used for analysis.

  Further, the automatic analyzer 1 includes a control unit 3 that controls each part of the measurement mechanism 2 and controls the overall operation of the apparatus. The control unit 3 is composed of a microcomputer having a built-in memory for holding various data necessary for the operation of the automatic analyzer 1 in addition to the analysis result, and is stored in a suitable place in the apparatus. It is shown outside the device for convenience. The control unit 3 is connected to the analysis unit 31 so that the measurement result by the photometric optical system 19 is appropriately output. The analysis unit 31 analyzes the component concentration of the specimen based on the measurement result by the photometric optical system 19 and outputs the analysis result to the control unit 3. In addition, the control unit 3 is configured to input an input unit 33 including an input device such as a keyboard and a mouse for inputting information necessary for analysis such as the number of samples and analysis items, and to output an analysis result and display a warning. Are connected to an output unit 35 including an output device such as a display or a printer.

  In the automatic analyzer 1 configured as described above, the sample dispensing mechanism 12 dispenses the sample in the sample container 11a to the plurality of reaction containers C that are sequentially transported on the reaction table 13, and the reagent dispensing mechanism 17 uses the reagent. Dispense the reagent in container B. Subsequently, after the stirrer 18 stirs and reacts the reagent and the sample in the reaction container C, the spectral intensity of the sample in a state in which the photometric optical system 19 has reacted is measured. And the analysis part 31 analyzes a measurement result, and the component analysis etc. of a sample are performed automatically. In addition, the cleaning device 20 cleans the reaction container C that has been measured by the photometric optical system 19, and a series of analysis operations are repeated continuously.

  Next, the cleaning device 20 will be described. FIG. 2 is a conceptual diagram illustrating the configuration of the cleaning device 20.

  As shown in FIG. 2, the cleaning device 20 includes an injection nozzle 211, a suction nozzle 213 whose tip is positioned vertically below the tip of the injection nozzle 211, and a limiting member 215 fixed to the outer wall of the suction nozzle 213. The nozzle part 21 comprised by is provided. The nozzles 211 and 213 constituting the nozzle portion 21 are fixed by a holder 217 and arranged above the reaction container C to be cleaned that is transported to a predetermined position on the reaction table 13. The injection nozzle 211 is connected to a cleaning water tank 223 storing cleaning water such as pure water by a water injection pipe 225 provided with a cleaning water injection pump 221, and the cleaning water is supplied into the reaction vessel C to be cleaned. inject. On the other hand, the suction nozzle 213 is connected to the waste liquid tank 231 and the waste liquid suction pump 233 that store the waste liquid by the waste liquid suction pipe 235, and sucks the liquid in the reaction container C. The liquid in the reaction container C sucked by the suction nozzle 213 is discarded from the waste liquid tank 231 to the outside.

  Further, the cleaning device 20 includes a nozzle drive unit 241 that moves the nozzle unit 21 up and down, and moves the nozzle unit 21 up and down relative to the inside of the reaction container C to be cleaned.

  FIG. 3A is a diagram illustrating a state in which the nozzle portion 21 is lowered, inserted into the reaction container C to be cleaned, and moved to the cleaning position. The state of is shown. FIG. 3B is a diagram illustrating the state in which the nozzle unit 21 is moved to the cleaning position from above. As shown in FIG. 3A, when the injection nozzle 211 is inserted into the reaction vessel C and moved to the cleaning position, the tip of the injection nozzle 211 is positioned slightly below the upper opening of the reaction vessel C. It is supposed to be. On the other hand, the suction nozzle 213 has a tip positioned near the bottom of the reaction vessel C.

  The limiting member 215 is arranged at a predetermined position between the tip of the injection nozzle 211 and the tip of the suction nozzle 213 so that the center thereof coincides with the center of the reaction vessel C. More specifically, in FIG. 3A, the liquid level of the reaction liquid held inside the reaction vessel C is indicated by a two-dot chain line, but when the nozzle portion 21 is moved to the cleaning position, the limiting member The arrangement position of 215 is arranged so as to be above the liquid level of the reaction liquid in the vertical direction. The limiting member 215 is a plate-like body whose planar shape is similar to the cross-sectional shape of the reaction vessel C, and is formed so that its outer diameter is slightly smaller than the inner diameter of the reaction vessel C. For example, as illustrated in FIG. 3B, the limiting member 215 has a square shape whose planar shape is the cross-sectional shape of the reaction vessel C. The limiting member 215 uniformly diffuses the cleaning water injected from the injection nozzle 211 to the inner wall side surfaces of the reaction vessel C and flows the cleaning water from the gap between the limiting member 215 and the inner wall side surface of the reaction vessel C. The wash water that has been introduced is circulated along the side surface of the inner wall.

  Then, as shown in FIG. 2, the control unit 3 controls the operation of each part of the washing water injection pump 221, the waste liquid suction pump 233, and the nozzle drive unit 241, thereby performing the washing operation of the reaction container C, and the reaction The inside of the container C is cleaned.

  FIG. 4 is a timing chart for explaining the flow of the operation of each part of the cleaning device 20, and shows the operation timing of the lowering and raising operations of the nozzle unit 21, the injection operation of the injection nozzle 211, and the suction operation of the suction nozzle 213. Yes. FIGS. 5A and 5B are diagrams for explaining the cleaning operation of the reaction vessel C. FIG.

  As shown in FIG. 4, the control unit 3 first controls the nozzle driving unit 241 and the waste liquid suction pump 233 to simultaneously start the lowering operation of the nozzle unit 21 and the suction operation of the suction nozzle 213 (t1). As a result, as shown in FIG. 5A, the nozzle unit 21 descends from the initial position while gradually sucking the reaction liquid held in the reaction container C by the suction nozzle 213 and gradually enters the reaction container C. Inserted and moved to cleaning position.

  When the nozzle unit 21 moves to the cleaning position, the control unit 3 controls the nozzle drive unit 241 to stop the lowering operation of the nozzle unit 21 and also controls the cleaning water injection pump 221 as shown in FIG. Then, the injection operation of the injection nozzle 211 is started (t2). Here, the injection input of the injection nozzle 211 is caused by the fact that a water film is formed over the entire inner wall side surface of the reaction vessel C below the limiting member 215 due to the cleaning water flowing from the gap between the limiting member 215 and the inner wall side surface of the reaction vessel C. It is set in advance based on the required amount of washing water so that it can be formed and the dirt adhering to the inner wall side surface of the reaction vessel C can flow down together with the washing water. The suction force of the suction nozzle 213 is set in advance to a predetermined value that is a predetermined amount larger than the injection input of the injection nozzle 211. The control unit 3 controls the injection operation by the injection nozzle 211 and the suction operation by the suction nozzle 213 based on the preset injection input and suction force.

  As a result, as shown in FIG. 5B, cleaning water is injected into the reaction vessel C from the injection nozzle 211. The washing water injected from the injection nozzle 211 is uniformly diffused to the inner wall side surfaces of the reaction vessel C by the limiting member 215 as indicated by arrows in FIG. 5B, and the limiting member 215 and the inner wall side surfaces of the reaction vessel C are diffused. It flows in through the gap. Then, the washing water flowing in from the gap becomes a water film over the entire inner wall side surface of the reaction vessel C, flows down along the inner wall side surface of the reaction vessel C, flows through the bottom surface of the reaction vessel C, and is sucked by the suction nozzle 213. Sucked.

  When the cleaning inside the reaction vessel C is completed by the above cleaning operation, as shown in FIG. 4, the control unit 3 controls the waste liquid suction pump 233 and the cleaning water injection pump 221 to perform the suction operation of the suction nozzle 213. In addition, the injection operation of the injection nozzle 211 is stopped and the nozzle drive unit 241 is controlled to start the operation of raising the nozzle unit 21 (t3). If the nozzle unit 21 has moved to the initial position above the reaction vessel C, the control unit 3 controls the nozzle drive unit 241 to stop the ascending operation of the nozzle unit 21 (t4).

  According to the embodiment described above, the wash water injected from the injection nozzle 211 is supplied to the reaction vessel C by the limiting member 215 disposed vertically above the liquid level of the reaction solution held in the reaction vessel C. Can be uniformly diffused on the side surface of each inner wall. Then, the cleaning water is allowed to flow from the gap between the limiting member 215 and the inner wall side surface of the reaction vessel C to limit the flow of the cleaning water to the flow along the inner wall side surface of the reaction vessel C, and the entire inner wall side surface below the limiting member 215. A water film can be formed. Furthermore, the suction force of the suction nozzle 213 is set larger than the injection input of the injection nozzle 211, and the flow of the cleaning water flowing down along the inner wall side surface can be positively formed. Therefore, the dirt adhering to the side surface of the inner wall of the reaction vessel C can be washed down sufficiently with the washing water, and the inside of the reaction vessel C can be reliably washed.

  Conventionally, a cleaning apparatus having an overflow nozzle for preventing overflow of cleaning water from the reaction vessel is known. According to the cleaning apparatus 20, the suction operation by the suction nozzle 213 is performed by the injection nozzle 211. Since the suction nozzle 213 is caused to suck with a force greater than the injection input by the injection nozzle 211, the overflow nozzle is not required. For this reason, since the cross-sectional area of the nozzle becomes small, it can be inserted into a small reaction vessel having a small cross-sectional area. Therefore, it is also possible to apply to an automatic analyzer using a small reaction vessel.

  In the above-described embodiment, the nozzle portion 21 including the limiting member 215 configured with a plate-like body having a shape similar to the cross-sectional shape of the reaction vessel C has been described. However, the present invention is not limited to this. Absent.

(Modification 1)
FIG. 6A is a diagram illustrating the configuration of the nozzle portion 21b according to the first modification, and is a view showing a state in which the nozzle portion 21b is inserted into the reaction vessel C to be cleaned and moved to the cleaning position. is there. FIG. 6B is a diagram illustrating the state in which the nozzle portion 21b is moved to the cleaning position from above. FIG. 7 is an enlarged view of the distal end portion of the suction nozzle 213b constituting the nozzle portion 21b.

  The nozzle portion 21b includes a pyramid-shaped limiting member 215b. When the nozzle portion 21b is moved to the cleaning position, the lower end portion of the limiting member 215b is more than the liquid level of the reaction liquid held inside the reaction vessel C. Is also arranged vertically upward and fixed to the suction nozzle 213b. More specifically, the limiting member 215b has a square shape whose planar shape is similar to the cross-sectional shape of the reaction vessel C, as shown in FIG. It is formed so as to be slightly smaller than the inner diameter. In this nozzle portion 21b, the washing water injected from the injection nozzle 211 is uniformly diffused to the side surfaces of the inner walls of the reaction vessel C by the limiting member 215b, as indicated by arrows in FIG. 6-1, and the limiting member 215b. And from the gap between the inner wall side surface of the reaction vessel C. Then, a water film is formed over the entire inner wall side surface of the reaction vessel C, flows down along the inner wall side surface of the reaction vessel C, flows through the bottom surface of the reaction vessel C, and is sucked by the suction nozzle 213b.

  Also, as shown in FIG. 7, a plurality of notches 219b are formed at the tip of the main suction nozzle 213b, and when the nozzle portion 21b is inserted into the reaction vessel C and moved to the washing position, This tip is in contact with the bottom of the reaction vessel C. According to this, the washing water that has flowed to the bottom of the reaction vessel C can be uniformly sucked from each direction.

  According to the first modification, the same effects as those of the above embodiment can be obtained. Further, since the upper surface of the limiting member 215b through which the cleaning water injected from the injection nozzle 211 flows is inclined downward, the flow of the cleaning water along each inner wall side surface of the reaction vessel C can be more positively formed. . Furthermore, the inclination of the upper surface of the limiting member 215b allows the washing water to be guided to the gap between the limiting member 215b and the inner wall side surface of the reaction vessel C without being scattered outside the reaction vessel C, and to flow from the gap.

(Modification 2)
FIG. 8 is a diagram illustrating the configuration of the nozzle portion 21c according to the second modification, and shows a state in which the nozzle portion 21c is inserted into the reaction vessel C to be cleaned and moved to the cleaning position. The nozzle portion 21c includes a prismatic limiting member 215c having a similar shape to the internal space of the reaction vessel C. When the nozzle portion 21c is moved to the cleaning position, the upper surface of the limiting member 215c is the reaction vessel C is disposed vertically above the liquid level of the reaction liquid held inside C and fixed to the suction nozzle 213. That is, the limiting member 215c has a cross-sectional shape similar to the cross-sectional shape of the reaction vessel C (the cross-sectional shape of the internal space of the reaction vessel C), and the vertical cross-section is a longitudinal section of the internal space of the reaction vessel C. It has a shape similar to the surface shape, and a passage for guiding the wash water to the bottom of the reaction vessel C is formed by the side wall of the limiting member 215 c and the inner wall of the reaction vessel C. In this nozzle portion 21c, the washing water injected from the injection nozzle 211 is uniformly diffused on the side of each inner wall of the reaction vessel C by the limiting member 215c as shown by the arrow in FIG. 8, and reacts with the limiting member 215c. It flows from the gap between the inner wall side surface of the container C. Then, it flows through a passage formed by a gap between the side wall of the limiting member 215 c and the inner wall side surface of the reaction vessel C, flows through the bottom surface of the reaction vessel C, and is sucked by the suction nozzle 213.

  According to the second modification, the wash water injected from the injection nozzle 211 can be reliably circulated along the inner wall side surface of the reaction vessel C. Therefore, the cleaning effect of the inner wall side surface of the reaction vessel C can be improved. In addition, since the suction nozzle 213 is covered by the limiting member 215c except for the tip portion, there is an effect that the outer wall of the suction nozzle 213 is hardly contaminated.

(Modification 3)
FIG. 9 is a diagram for explaining the configuration of the nozzle portion 21d according to the modified example 3, and shows a state where the nozzle portion 21d is inserted into the reaction vessel C to be cleaned and moved to the cleaning position. As shown in FIG. 9, the limiting member 215 d constituting the nozzle portion 21 d is a combination of the limiting member 215 b according to the first modification and the limiting member 215 c according to the second modification. In this nozzle portion 21d, the wash water injected from the injection nozzle 211 is uniformly diffused on the side of each inner wall of the reaction vessel C by the limiting member 215d as shown by the arrows in FIG. 9, and reacts with the limiting member 215d. It flows from the gap between the inner wall side surface of the container C. Then, it flows through a passage formed by the gap between the side wall of the limiting member 215 d and the inner wall side surface of the reaction vessel C, flows through the bottom surface of the reaction vessel C, and is sucked by the suction nozzle 213. Therefore, the same effects as those of Modification 1 and Modification 2 can be achieved.

  Further, in the above-described embodiment, in order to prevent the overflow of the washing water from the reaction vessel C, the suction operation start timing by the suction nozzle 213 and the injection operation start timing by the injection nozzle 211 are described as shown in FIG. However, it is also possible to start the suction operation and the supply operation at the same time. In this case, the suction force of the suction nozzle 213 at the initial stage of the operation is set to be sufficiently larger than the case where the operation is started with a time difference from the injection input of the injection nozzle 211.

  In the above-described embodiment, the case where the planar shape of the limiting member 215 is a square has been described. However, the present invention is not limited to this. 10-13 is a figure which shows the modification of the planar shape of a limitation member. For example, as shown in FIG. 10, when the cross-sectional shape of the reaction vessel C10 is a hexagonal shape, a hexagonal limiting member 215e whose plane shape is similar to the cross-sectional shape of the reaction vessel C10 is used. Also, as shown in FIG. 11, if the cross-sectional shape of the reaction vessel C20 is a rectangular shape such as a rectangle, a limiting member 215f having a rectangular shape similar to the cross-sectional shape of the reaction vessel C20 is used. As shown in FIG. 12, if the cross-sectional shape of the reaction vessel C30 is triangular, a limiting member 215g having a triangular shape similar to the cross-sectional shape of the reaction vessel C30 is used. Alternatively, as shown in FIG. 13, if the cross-sectional shape of the reaction vessel C40 is an octagonal shape, the limiting member 215h having an octagonal shape similar to the cross-sectional shape of the reaction vessel C40 is used.

  Further, in the above-described embodiment, the case where two reagent storages are provided in the automatic analyzer 1 has been described, but there may be one reagent storage.

It is a schematic diagram which shows the structure of an automatic analyzer. It is a conceptual diagram explaining the structure of a washing | cleaning apparatus. It is a figure which shows the state which moved the nozzle part to the washing | cleaning position. It is the figure which showed the state which moved the nozzle part to the washing | cleaning position from the upper side. It is a timing chart explaining the flow of operation of each part of a washing device. It is a figure explaining washing | cleaning operation | movement of a reaction container. It is a figure explaining washing | cleaning operation | movement of a reaction container. It is a figure which shows the state which moved the nozzle part which concerns on the modification 1 to the washing | cleaning position. It is the figure which showed the state which moved the nozzle part which concerns on the modification 1 to the washing | cleaning position from the upper side. It is the figure which expanded the front-end | tip part of the suction nozzle which comprises the nozzle part which concerns on the modification 1. FIG. It is a figure which shows the state which moved the nozzle part which concerns on the modification 2 to the washing | cleaning position. It is a figure which shows the state which moved the nozzle part which concerns on the modification 3 to the washing | cleaning position. It is a figure which shows the modification of the planar shape of a limiting member. It is a figure which shows the modification of the planar shape of a limiting member. It is a figure which shows the modification of the planar shape of a limiting member. It is a figure which shows the modification of the planar shape of a limiting member.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Automatic analyzer 2 Measuring mechanism 11 Specimen transport mechanism 12 Specimen dispensing mechanism 13 Reaction table 14 Reagent storage 16 Reading device 17 Reagent dispensing mechanism 18 Stirring device 19 Measuring optical system 20 Cleaning device 210 Nozzle part 211 Injection nozzle 213 Suction nozzle 215 Limiting member 217 Holder 221 Washing water injection pump 223 Washing water tank 225 Water injection pipe 231 Waste liquid tank 233 Waste liquid suction pump 235 Waste liquid suction pipe 241 Nozzle drive unit 3 Control unit C Reaction vessel

Claims (6)

In a cleaning device for cleaning the inside of a container,
An injection nozzle for injecting a liquid for cleaning the inside of the container from the tip into the container, the tip being disposed on the container upper part;
A suction nozzle that is disposed inside the container at a tip lower than the tip of the injection nozzle in the vertical direction and sucks the liquid injected into the container by the injection nozzle from the tip;
A limiting member that is disposed between the tip of the injection nozzle and the tip of the suction nozzle and limits the flow of the liquid injected by the injection nozzle to a flow along the inner wall side surface of the container;
A cleaning apparatus comprising:   A timing control means is provided for controlling a suction start timing by the suction nozzle and an injection start timing by the injection nozzle, and starting suction by the suction nozzle before injection by the injection nozzle. Item 2. The cleaning device according to Item 1.   The cleaning apparatus according to claim 1, further comprising a suction force control unit that causes the suction nozzle to suck the liquid with a force greater than the liquid injection input by the injection nozzle.   The cleaning device according to claim 1, wherein the limiting member is disposed vertically above the liquid level of the liquid held in the container before cleaning.   The cleaning device according to claim 1, wherein the limiting member has a cross-sectional area smaller than a cross-sectional area of the internal space of the container and a cross-sectional shape similar to the cross-sectional shape of the internal space of the container.   An automatic analyzer comprising the cleaning device according to any one of claims 1 to 5.

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