WO2020208919A1 - 自動分析装置 - Google Patents

自動分析装置 Download PDF

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Publication number
WO2020208919A1
WO2020208919A1 PCT/JP2020/004541 JP2020004541W WO2020208919A1 WO 2020208919 A1 WO2020208919 A1 WO 2020208919A1 JP 2020004541 W JP2020004541 W JP 2020004541W WO 2020208919 A1 WO2020208919 A1 WO 2020208919A1
Authority
WO
WIPO (PCT)
Prior art keywords
case
cover
lock
interlock unit
housing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2020/004541
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
元 末成
山下　太一郎
大草　武徳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi High Tech Corp
Original Assignee
Hitachi High Technologies Corp
Hitachi High Tech Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi High Technologies Corp, Hitachi High Tech Corp filed Critical Hitachi High Technologies Corp
Priority to EP20788215.0A priority Critical patent/EP3955005B1/en
Priority to CN202080027530.9A priority patent/CN113661394B/zh
Priority to US17/599,002 priority patent/US12392788B2/en
Priority to JP2021513494A priority patent/JP7138783B2/ja
Publication of WO2020208919A1 publication Critical patent/WO2020208919A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N35/00—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
    • B01L3/50—Containers for the purpose of retaining a material to be analysed, e.g. test tubes
    • B01L3/505—Flexible containers without fluid transport within
    • B01L3/5055—Hinged, e.g. opposable surfaces
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B47/00—Operating or controlling locks or other fastening devices by electric or magnetic means
    • E05B47/0001—Operating or controlling locks or other fastening devices by electric or magnetic means with electric actuators; Constructional features thereof
    • E05B47/0002—Operating or controlling locks or other fastening devices by electric or magnetic means with electric actuators; Constructional features thereof with electromagnets
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B47/00—Operating or controlling locks or other fastening devices by electric or magnetic means
    • E05B47/02—Movement of the bolt by electromagnetic means; Adaptation of locks, latches, or parts thereof, for movement of the bolt by electromagnetic means
    • E05B47/023—Movement of the bolt by electromagnetic means; Adaptation of locks, latches, or parts thereof, for movement of the bolt by electromagnetic means the bolt moving pivotally or rotatively
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B65/00—Locks or fastenings for special use
    • E05B65/006—Locks or fastenings for special use for covers or panels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2200/00—Solutions for specific problems relating to chemical or physical laboratory apparatus
    • B01L2200/14—Process control and prevention of errors
    • B01L2200/141—Preventing contamination, tampering
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2300/00—Additional constructional details
    • B01L2300/04—Closures and closing means
    • B01L2300/041—Connecting closures to device or container
    • B01L2300/043—Hinged closures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2300/00—Additional constructional details
    • B01L2300/06—Auxiliary integrated devices, integrated components
    • B01L2300/0609—Holders integrated in container to position an object
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2300/00—Additional constructional details
    • B01L2300/06—Auxiliary integrated devices, integrated components
    • B01L2300/0627—Sensor or part of a sensor is integrated
    • B01L2300/0663—Whole sensors
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B47/00—Operating or controlling locks or other fastening devices by electric or magnetic means
    • E05B47/0001—Operating or controlling locks or other fastening devices by electric or magnetic means with electric actuators; Constructional features thereof
    • E05B2047/0014—Constructional features of actuators or power transmissions therefor
    • E05B2047/0018—Details of actuator transmissions
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B47/00—Operating or controlling locks or other fastening devices by electric or magnetic means
    • E05B47/0001—Operating or controlling locks or other fastening devices by electric or magnetic means with electric actuators; Constructional features thereof
    • E05B2047/0014—Constructional features of actuators or power transmissions therefor
    • E05B2047/0018—Details of actuator transmissions
    • E05B2047/002—Geared transmissions
    • E05B2047/0021—Geared sectors or fan-shaped gears
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B47/00—Operating or controlling locks or other fastening devices by electric or magnetic means
    • E05B2047/0072—Operation
    • E05B2047/0076—Current to lock only, i.e. "fail-safe"
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N35/00—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
    • G01N2035/00178—Special arrangements of analysers
    • G01N2035/00306—Housings, cabinets, control panels (details)
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N35/00—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
    • G01N2035/00178—Special arrangements of analysers
    • G01N2035/00306—Housings, cabinets, control panels (details)
    • G01N2035/00316—Detecting door closure

Definitions

  • the automatic analyzer is a device that automatically analyzes blood and other biological samples and outputs the results, and is an indispensable device in hospitals and medical testing facilities. These automatic analyzers are required to perform a wider variety of inspections in a shorter time.
  • an openable and closable safety cover equipped with an interlock mechanism is provided on the upper part of the work surface where the analysis work is performed, and the safety cover opens while the device is being driven to operate the device. Lock it so that it does not stop and delay the inspection.
  • the interlock mechanism is released so that the safety cover can be opened and closed, and the operator can open and close the work surface with the safety cover open. Access above to enable various tasks.
  • Patent Document 1 describes a sample processing device for processing a sample, which is provided with an operation mechanism and operates the operation mechanism to execute a sample processing operation.
  • the control unit includes a main body of the processing device, a cover that covers at least one operation mechanism, a lock mechanism that locks the cover to prohibit opening of the cover, and a control unit that controls the lock mechanism. Is the first mode in which the cover is not unlocked until the lock release instruction is received from the user after the sample processing operation by the operation mechanism is completed, and the sample processing operation by the operation mechanism is completed. Later, there is disclosed a sample processing device configured to be able to set a second mode for automatically unlocking the cover.
  • the present invention has been made in view of the above, and an object of the present invention is to provide an automatic analyzer capable of improving maintainability by facilitating access to an interlock unit.
  • the present application includes a plurality of means for solving the above problems.
  • the present application covers a housing accommodating an analyzer for analyzing a sample and an upper surface of the housing, which is an upper surface of a work surface.
  • a cover provided so as to be rotatable in the vertical direction between the closed position and the open position around a support shaft provided on one rear side of the upper surface of the housing, and the housing.
  • An automatic analyzer provided in front of the upper surface and provided with an interlock unit capable of prohibiting rotation of the cover from the closed position to the open position, wherein the interlock unit is the front in the closed position of the cover.
  • FIG. 5A is a cross-sectional view taken along the line AA in FIG. 5A. It is a perspective view which shows the unlocked state of an interlock unit. It is a perspective view which shows the unlocked state of an interlock unit.
  • FIG. 5A is a cross-sectional view taken along the line AA showing the locked state of the interlock unit in FIG. 5A. It is a perspective view which shows the locked state of an interlock unit.
  • FIG. 8 is a cross-sectional view taken along the line BB in FIG.
  • FIG. 8 is a cross-sectional view taken along the line CC in FIG.
  • It is an exploded perspective view which shows the structure of an interlock unit. It is a side view which shows the locked state of an interlock unit. It is a rear view of the locked state of an interlock unit.
  • FIG. 5A is a cross-sectional view taken along the line AA showing the locked state of the interlock unit in FIG. FIG.
  • FIG. 5A of the unlocked state of the interlock unit which concerns on 3rd Embodiment It is a perspective view which shows the unlocked state of an interlock unit.
  • FIG. 5 is a cross-sectional view taken along the line AA of the locked state of the interlock unit. It is a perspective view which shows the locked state of an interlock unit. It is a top view of the interlock unit which concerns on 4th Embodiment.
  • FIG. 5 is a sectional view taken along line AA in FIG. 5A of the interlock unit according to the fourth embodiment. It is a perspective view of the interlock unit which concerns on 5th Embodiment. It is sectional drawing of the interlock unit which concerns on 6th Embodiment. It is a block diagram which shows the schematic structure of the automatic analyzer. It is a flowchart which shows the operation of an interlock unit.
  • FIG. 1 is a plan view showing the overall configuration of an automatic analyzer including a reagent disk. Further, FIG. 2 is a perspective view of the automatic analyzer with the safety cover open, and FIG. 3 is a left side view.
  • the upper direction is the upper side (upper)
  • the lower direction is the lower side (lower side)
  • the side accessed by the operator of the automatic analyzer 1 is the front side (front) and the opposite side. Is defined as the rear (rear)
  • the right direction when the automatic analyzer 1 is viewed from the front is defined as the right side (right)
  • the left direction is defined as the left side (left).
  • the automatic analyzer 1 includes a reagent disk (reagent container holder) 2, a safety cover 4, a sample transporting means 5, a sample dispensing means 6, a chip rack 7, a transporting means 8, and an incubator 9.
  • the housing 21 covers the front plate 56, the left and right side plates 57, the back plate 58, and the upper surface, that is, the work surface 22 around a highly rigid housing frame 55 in which steel plates are joined by means such as welding or riveting. It has a substantially rectangular parallelepiped shape, and houses a sample transporting means 5, a cleaning means 17, a reagent cold storage 24, a substrate, a flow path, etc. (not shown) inside.
  • the front plate 56, the left and right side plates 57, and the back plate 58 are configured to be removable during maintenance work.
  • the interlock is provided separately from the lock mechanism specified in ISO, etc., which restricts the opening and closing of the safety cover for the purpose of ensuring safety, and the analysis operation is performed when the operator accidentally opens the safety cover. Is provided to prevent the work from being temporarily stopped, resulting in a delay in the entire work.
  • the door open / close detection 202 is connected to a power supply (not shown), and when the safety cover 4 is closed, the power supply is connected to enable the automatic analyzer 1 to operate, and when the safety cover 4 is opened, the power supply is turned off. Stop the automatic analyzer 1.
  • the chip rack 7 is configured to be detachable from the automatic analyzer 1, and is arranged on the upper surface of the automatic analyzer 1 by an operator with a plurality of sample dispensing chips 10 and a plurality of reaction vessels 14 placed therein.
  • the sample dispensing tip buffer 11 is a buffer on which the sample dispensing tip 10 gripped by the conveying means 8 is temporarily placed.
  • the sample dispensing chip buffer 11 is configured so that a plurality of sample dispensing chips 10 can be placed.
  • the reagent disk 2 forms a slot for holding a plurality of reagent containers 3 radially along the circumferential direction.
  • the reagent disc 2 is configured to be rotatable around a central axis extending in the vertical axis direction, and by rotating the reagent disc 2, each reagent container 3 is moved to a predetermined position. For example, by rotating the reagent disk 2, the reagent container 3 containing the target reagent can be moved to the reagent dispensing position 15a.
  • the reagent container 3 may contain magnetic particles for stirring the reagent.
  • the stirring means 16 is provided above the reagent dispensing position 15a and includes a magnetic particle stirring arm that can rotate around a central axis extending in the vertical axis direction. At the lower end of the magnetic particle stirring arm, for example, a paddle-shaped or spiral magnetic particle stirring means is provided.
  • the magnetic particle stirring arm stirs the reagent by lowering and rotating the magnetic particle stirring means in the reagent containing the magnetic particles. In order to prevent precipitation of magnetic particles in the reagent, the magnetic particle stirring arm stirs the reagent immediately before the reagent is dispensed by the reagent dispensing probe 15. After stirring, the magnetic particle stirring arm moves to the cleaning means 17 containing the cleaning liquid, and the magnetic particle stirring means is rotated for cleaning.
  • the reaction vessel 14 into which the predetermined reagent and the sample 5a are dispensed is controlled to a predetermined temperature by the incubator 9, and the reaction is promoted for a predetermined time.
  • the reagent and the reaction solution of the sample 5a are supplied from the reaction vessel 14 to the detection unit 19 by the reaction solution dispensing probe 18, and the physical properties thereof are detected by the detection unit 19. Examples of physical properties include, but are not limited to, the amount of light emitted, the amount of scattered light, the amount of transmitted light, the current value, and the voltage value.
  • the detection unit 19 may perform analysis while holding the reaction solution in the reaction vessel 14.
  • a host computer 200 is connected to the automatic analyzer 1, and a series of operations of the above configuration of the automatic analyzer 1 is controlled by the host computer 200.
  • the automatic analyzer 1 can efficiently analyze a plurality of samples with respect to a plurality of analysis items by combining or repeating the above operations.
  • FIG. 3 the state in which the safety cover 4 is closed is shown by a solid line, and the state in which the safety cover 4 is opened is shown by a alternate long and short dash line.
  • the front side of the safety cover 4 is provided with a handle portion 27 which is a recess into which a finger is inserted when the safety cover 4 is opened from the closed position.
  • the lock receiving means 25 is provided so as to come into contact with the rear surface of the handle portion 27 and extend rearward.
  • the front side height H1 of the safety cover 4 has a sufficient height, and it is desirable that there are no partial protrusions or the like downward from the front side of the safety cover 4, or there are protrusions. Even if it is, it is desirable that the outer shape is smooth.
  • the handle portion 27 and the lock receiving means 25 are provided close to the substantially central portion in the left-right direction of the safety cover 4.
  • the lock receiving means 25 is displaced to the left or right with respect to the handle portion 27, the force of the hand trying to open the safety cover 4 and the reaction from the lock receiving means 25 trying to lock. Since a moment is generated by the force, the safety cover 4 tends to rise on the side of the handle portion 27 while being twisted, and there is a problem that the amount of lift on the side surface of the safety cover 4 on the side close to the handle portion 27 increases.
  • FIG. 4 is a perspective view showing a state in which the interlock unit is attached to the frame.
  • the interlock unit 26 includes a case 47 made of a substantially rectangular parallelepiped made of resin, a lock lever 35 which is an acting member provided on the upper surface of the case, and a solenoid 41 which is a driving means provided on the lower surface of the case 47. It is provided with a drive connecting means (drive connecting member) that operates by connecting the plunger of the solenoid 41 and the lock lever 35. The details will be described later.
  • the front plate 56 forming the front surface of the housing 21 is detachably provided during maintenance work such as periodic inspection, and in FIG. 4, the front plate 56 is removed, and the housing 21 Indicates a state in which the front surface of the is opened as a front opening.
  • the interlock unit 26 is provided immediately after the front plate 56, and is provided from the front via the mounting bracket 59 with respect to the housing frame 55 constituting the housing 21 via the screw holes 105 by the mounting screws 61. It is configured to be screwed and fixed.
  • the interlock unit 26 is attached from the lower side of the work surface 22 through the work surface opening 22a provided on the work surface 22, and the upper surface is exposed from the work surface 22 so as to be substantially the same surface as the work surface 22. Positioned and fixed.
  • the mounting bracket 59 has a substantially U-shape that is symmetrical in the top view, and a mounting groove 60 that is a vertically long slit in which the upper end is opened in the center of the left and right and the lower end is connected to the left and right in the front view.
  • the unit mounting surfaces 93 are provided on the left and right sides of the mounting groove 60 facing the front surface.
  • the left-right width of the mounting groove 60 is larger than the case width of the interlock unit 26, and the interlock unit 26 can be arranged in the mounting groove 60 and screwed from the front by the mounting screw 61.
  • the height of the mounting screw 61 is lower than the work surface 22, and if the front plate 56 of the housing 21 is removed, the height of the mounting screw 61 is arranged so that it can be directly viewed from the front through the front opening. It is easy to put on and take off and has good maintainability. Therefore, it is easy to install and remove, and has good assembly and maintainability.
  • the interlock unit 26 is formed to be long in the vertical direction and short in the front-rear direction, even when the safety cover 4 is closed, the front plate 56 is removed from the front. If the mounting screw 61 is removed by the driver 62, the interlock unit 26 can be easily removed downward from the front opening. Therefore, even if the safety cover 4 cannot be opened in the locked state due to a failure or the like, the interlock unit 26 can be easily removed, so that maintainability is good.
  • the suitable arrangement of the interlock unit 26, the mounting bracket 59, and the frame will be described later.
  • the receiving means 25 protrudes rearward.
  • the downwardly facing surface of the pair of lock receiving means 25 is an obtuse surface formed so as to taper toward the tip of the lock receiving means 25 in a side view, and the left end and the right end of the pair of lock receiving means 25.
  • the lock receiving means 25 is an inclined surface that is tapered so that the lock receiving means 25 becomes thinner toward the tip in a plan view, and the ridgeline on the side surface of the lock receiving means 25 has an obtuse angle to form a smooth shape.
  • the upper surface of the lock receiving means 25 is an inclined surface whose height increases as the distance from the front surface of the safety cover 4 increases, and ⁇ 1, which is the angle formed by the vertical surface and the upper surface of the lock receiving means 25, is an acute angle smaller than 90 °.
  • the lock receiving means 25 is suitable, for example, if it is molded from POM (polyacetal) resin, because a smooth shape can be easily created.
  • the plunger 42, the connecting plate 40, the first gear 32, the second gear 38, and the pull spring 45, which are the drive connecting means 53, are arranged in the case 47.
  • the left side case 47a, the right side case 47b, and the upper surface case 47c can be integrally molded with, for example, ABS resin, and even a complicated shape can be realized at low cost, which is preferable.
  • the first support shaft 31 is integrally molded with, for example, ABS (acrylonitrile butadiene styrene) resin together with the left side case 47a, and is provided so as to extend parallel to the front surface 23 of the safety cover toward the right side case 47b, and the first support shaft 31 is provided.
  • the tip of the is fitted to the first support bearing portion 63, which is a recess provided in the right case 47b.
  • the right case 47b may also be molded of ABS resin in the same manner as the left case 47a.
  • the first gear 32 is rotatably supported around the first support shaft 31 via the first gear shaft hole 90.
  • the teeth of the first gear 32 are provided around the first gear shaft hole 90 in a range of approximately 90 °.
  • a support rod 33 that is integrally molded with the first gear 32 and extends rearward, and the tip of the support rod 33 is convex in the left-right direction in parallel with the first support shaft 31 with the support rod 33 in between.
  • the pair of lock portions 34 is formed, and the pair of lock portions 34 and the support portion 33 form a lock lever 35 having a substantially T-shape.
  • the lock lever 35 is molded of, for example, POM resin, and the lock portion 34 has a flat upper surface and a tapered shape that becomes thinner toward the lower side when viewed from the left and right when unlocked, and the lower side is smooth in a semi-cylindrical shape. It has a substantially semi-cylindrical cross section.
  • the pair of lock portions 34 have a rectangular shape extending in the left-right direction with R provided at the corners when viewed from the upper surface, and the lower half has a hemispherical smooth shape.
  • the joint portion between the support portion 33 and the pair of lock portions 34 is smoothly connected in an R shape to prevent damage due to stress concentration. That is, the lock lever 35 is an example of an acting member that acts to lock the safety cover 4 with respect to the lock receiving means 25.
  • Cylindrical portion 48 From the gear tooth tip on the lower surface side of the first gear 32 to the support portion 33 is a cylindrical portion 48 having no teeth, which is equal to the tooth tip circle of the first gear 32.
  • the lock lever 35 is arranged so as to face the front-rear direction in parallel with the work surface 22 when the lock is released.
  • the upper surface of the upper surface case 47c is provided on substantially the same surface as the work surface 22, and is provided with a recess for accommodating the lock lever 35 when the lock is released. That is, the left-right width of the upper surface case 47c is larger than the width of the recess for accommodating the lock lever 35.
  • the upper surface of the lock lever 35 is flat and is flush with the upper surface of the upper surface case 47c. Further, the upper surface of the upper surface case 47c may be provided with a pair of left and right covering portions 36 having a partial columnar shape, which are gentle protrusions that cover the first support shaft 31 with the lock lever 35 interposed therebetween.
  • Lock portion 34 The lateral spacing between the pair of lock receiving means 25 in the left-right direction is larger than the width in the left-right direction of the support portion 33, and the support portion 33 is configured to be able to enter between the pair of lock portions 34.
  • the total width of the pair of lock portions 34 in the left-right direction is larger than the width of the tip portions of the pair of lock receiving means 25 in the left-right direction, and the left lock portion 34 can be engaged with the left lock receiving means 25 and is on the right side.
  • the lock portion 34 of the above is configured to be engaged with the lock receiving means 25 on the right side.
  • Second gear 38 The second support shaft 37 is integrated with the left side case 47a and is provided so as to extend toward the right side case 47b in parallel with the first support shaft 31, and the tip of the second support shaft 37 is a recess provided in the right side case 47b. It is fitted to the second support bearing portion 64.
  • the second gear 38 is formed of, for example, POM resin, is rotatably supported around the second support shaft 37, and meshes with the first gear 32 to rotate. The number of teeth of the second gear 38 is provided within a range in which the first gear 32 can be rotated by 90 ° to 90 ° or more to stand up.
  • Solenoid 41 The second gear 38 is provided with a connecting shaft 39 parallel to the second supporting shaft 37, and one end of the connecting plate 40 is rotatably supported by the connecting shaft 39.
  • the other end of the connecting plate 40 is rotatably supported by a drive pin 43 provided at one end of a cylindrical plunger 42 of a solenoid 41 which is an electromagnetic actuator.
  • the plunger 42 is supported so as to be movable in the longitudinal direction with respect to the solenoid 41.
  • the solenoid 41 When the solenoid 41 is energized from a power supply device (not shown), the plunger 42 is sucked so as to be close to the solenoid 41, and when the energization is released, the suction force is applied. It is a configuration to be released.
  • the plunger 42 can be moved in the vertical direction, and a hole through which the drive pin 43, which will be described later, penetrates is provided in the left-right direction near the upper end of the plunger 42.
  • a first spring hooking portion 44 is provided at one end of the second gear 38, and one end of the pull spring 45 is hooked.
  • the other end of the pull spring 45 is hung on a second spring hook portion 46 provided integrally with the left side case 47a, and the spring force of the pull spring 45 is a direction in which the plunger 42 is pulled out from the solenoid 41 via the second gear 38. It acts as a return spring when the energization of the solenoid 41 is released.
  • the plunger 42, the connecting plate 40, the first gear 32, the second gear 38, and the pull spring 45 are drives for transmitting a driving force between the solenoid 41 and the lock lever 35 when driving the lock lever 35.
  • the connecting means 53 is configured.
  • the mounting seat 67a and the mounting seat 67b are approximately the same as the first support shaft 31 in the front-rear direction when viewed from the left and right, or slightly forward of the first support shaft 31, that is, the lock receiving means 25 provided on the safety cover 4. It is provided in the immediate vicinity of.
  • the strength of the mounting seats 67a and 67b is ensured by the reinforcing ribs 68.
  • the left side case 47a and the right side case 47b have an enlarged width in the vicinity of the upper surface facing the upper surface case 47c to form the upper surface case mounting portion 69, and a step 70a is provided between the side wall portions 65a and 65b. .. Further, a step 70b is provided between the solenoid mounting portion 66 and the side wall portions 65a and 65b.
  • the right case 47b is provided with so-called snap-fit claws 71 for fitting to the left case 47a, for example, at two locations, a front surface and a rear surface.
  • the left case 47a is provided with a receiving portion 72 corresponding to the snap-fit claw 71.
  • the upper surface case 47c is provided with two snap-fit claws 73 on the left and right for fitting to the right side case 47b and the left side case 47a, and the right side case 47b and the left side case 47a correspond to the respective snap-fit claws 73.
  • the receiving portion 74 is provided and is fixed to each other by a snap fit.
  • a female screw (not shown) is provided in the left case 47a, a screw hole is provided at a corresponding position in the right case 47b, and one or a plurality of screws are inserted. It may be configured to fasten the right side case 47b and the left side case 47a to each other.
  • Top case 47c, top cover 76 The upper surface case 47c is provided with a through hole 75 for passing the lock portion 34 protruding to the left and right of the lock lever 35 at the time of assembly between the first support shaft 31 and the front surface of the upper surface case 47c.
  • the through hole 75 can be closed from above, and the 76 is fixed to the upper case 47c from the inside by the snap-fit claw 77.
  • the front end of the upper surface case 47c is located in front of the front edge of the through hole 75, and the rear end of the upper surface case 47c is located behind the rear edge of the recess 49 in which the lock lever 35 is housed. It has a rectangular shape.
  • the outer circumference of the upper surface cover 76 is extended downward, and in the cross section in the left-right direction, it is configured to cover the upper surface case mounting portion 69 provided near the upper ends of the left side case 47a and the right side case 47b from the outside.
  • the upper surface case mounting portion 69 of the left side case 47a and the right side case 47b functions as a case opening prevention portion 91 that prevents deformation that spreads in the left-right direction.
  • Rib 47d around the case The upper surface of the upper surface case 47c is attached so as to pass through from below the work surface opening 22a opened to the work surface 22 so as to be substantially the same surface as the work surface opening 22a.
  • a rib 47d around the case which is a rib protruding around the upper surface case 47c in a plan view, is provided slightly below the upper surface of the upper surface case 47c.
  • the case peripheral rib 47d is located slightly below the work surface 22, and the outer circumference of the case peripheral rib 47d is larger than the work surface opening 22a, and the interlock unit 26 is attached.
  • the gap formed between the upper surface case 47c and the work surface opening 22a is closed in a plan view to prevent the intrusion of liquid or foreign matter.
  • the connecting plate 40 has a substantially H-shape that is symmetrical when viewed from the front, and is molded of, for example, POM resin.
  • a drive pin hole 78 is bored in the lower end in the left-right direction, and a drive pin hole 78 is formed in the upper end.
  • a connecting shaft hole 79 is bored in parallel with the drive pin hole 78.
  • the drive pin hole 78 at one end has a gap having a width slightly larger than the diameter of the plunger 42, and the connecting plate 40 is connected to the plunger 42 by sandwiching the plunger 42 inside the gap and penetrating the drive pin 43.
  • the shaft is oscillatingly supported.
  • the connecting shaft hole 79 at the other end is rotatably fitted to the connecting shaft 39, which is a protrusion provided on the second gear 38 by a so-called snap fit.
  • a slope 80 may be formed so as to open outward from the connecting shaft hole 79.
  • a slope facing the slope 80 may be formed at the tip of the connecting shaft 39.
  • Second gear 38, water shield rib 82 The second gear 38 is rotatably supported by fitting the second gear shaft hole 81 into the second support shaft 37.
  • a thin plate portion cylindrical water repellent rib 82 larger than the tooth width in the left-right direction is concentric with the second gear 38. It is provided integrally in a shape and is extended so as to be close to the inner wall surface of each of the left side case 47a and the right side case 47b.
  • the rear end side of the water repellent rib 82 has a shape extended downward, and is configured so that the liquid dropped on the upper surface of the water repellent rib 82 can flow through.
  • the rear end of the water repellent rib 82 is located behind the plunger 42 of the solenoid 41 and the connecting plate 40, and serves as the first water repellent rib end 83.
  • the front end of the water repellent rib 82 on the opposite side of the first water repellent rib end 83 is the second water repellent rib end 84.
  • first case rib 85 and the second case rib 86 which are concentrically with the water repellent rib 82 and are partially arcuate and convex inward, are formed. It is provided.
  • the inner circumference of the first case rib 85 is larger than the outer circumference of the water repellent rib 82 of the second gear 38, and is arranged with a gap of, for example, about 1 mm.
  • the outer circumference of the second case rib 86 is smaller than the inner circumference of the water repellent rib 82 of the second gear 38, and is arranged with a gap of, for example, about 1 mm.
  • the first case rib 85 and the second case rib 86 are provided so as not to come into contact with the second gear 38, and the tips of the first case rib 85 and the second case rib 86 are the left and right side surfaces of the second gear 38. And, for example, they are arranged with a gap of about 1 mm. That is, the first case rib 85, the second case rib 86, the water repellent rib 82, and the left and right side surfaces of the second gear 38 have a so-called labyrinth structure having an intricate cross-sectional shape. Since the first case rib 85, the second case rib 86, and the water repellent rib 82 are concentric circles, the labyrinth structure is maintained even if the second gear 38 rotates. The labyrinth structure prevents the liquid from passing between the first case rib 85 or the second case rib 86 and the water repellent rib 82.
  • Gutter 87 The rear surface of the second case rib 86 extends vertically downward along the plunger 42 behind the plunger 42 and the connecting plate 40 of the solenoid 41. The vicinity of the lower end of the second case rib 86 is seamlessly extended from the inner wall of the left case 47a to the inner wall of the right case 47b, and the lower surface is inclined so as to gradually decrease from the inner wall of the right case 47b to the inner wall of the left case 47a.
  • the gutter 87 is a face. The portion of the inner wall of the left case 47a in contact with the gutter 87 is opened to form the first drainage port 88.
  • Third case rib 89, second drain port 92 A third case rib 89 is provided on the side opposite to the gutter 87 with respect to the plunger 42 of the solenoid 41 and on the lower side of the second support shaft 37.
  • the third case rib 89 is integrally planted with the left side case 47a, and its lower end is in contact with the lower surfaces of the left side case 47a and the right side case 47b. After extending vertically upward from the lower end, it is bent in a direction close to the connecting plate 40, inclined to the vicinity of the lower part of the second support shaft 37, and extended to the third case rib end 106.
  • a second drainage port 92 is opened between the third case rib 89 and the front surfaces of the left side case 47a and the right side case 47b.
  • Case 47 By using the left case 47a, the right case 47b, and the upper case 47c as resin molded parts, the first case rib 85, the second case rib 86, the third case rib 89, the gutter 87, etc. Since the liquid guide means and the drain ports 88 and 92 can be appropriately arranged together with the case, there is an effect that the number of parts can be reduced and a simple configuration can be realized.
  • FIG. 8 is a sectional view taken along line AA showing the locked state of the interlock unit in FIG. 5A.
  • the tips of the first support shaft 31, the second support shaft 37, and the first spring hooking portion 44 are fitted into the corresponding recesses provided in the right case 47b.
  • the first support shaft 31, the second support shaft 37, and the first spring hooking portion 44 are not cantilevered but double-sided beams. Therefore, it is possible to reduce the stress generated when an external force is applied and realize a highly reliable interlock unit.
  • the upper surface case 47c is sandwiched between the upper surface case mounting portion 69 which is the widening portion of the upper surface of the left side case 47a and the right side case 47b from above. Install.
  • the through hole 75 is closed with the top cover 76.
  • the top cover 76 is joined by a pair of snap-fit claws 77 provided on the left and right sides and protruding outward by a so-called snap-fit from the inside of the through hole 75.
  • a motor When a motor is used as the drive source, it can be decelerated by a gear or the like to increase the torque and drive against frictional resistance, but when a solenoid is used, the operating stroke of the solenoid is Since it is small, it is generally used without deceleration, so it is desirable to reduce the drive load as much as possible. Therefore, a watertight member cannot be used, and a gap is required between the rotating member and the fixing member so as not to interfere with the operation.
  • the lock lever 35 and the first gear 32 are integrally rotatably configured around the first support shaft 31, the upper case 47c or the upper cover 76 is connected so as not to hinder the rotation.
  • a gap of about 0.2 to 0.5 mm is provided between the gaps so as to cause play. Therefore, if a liquid such as a reagent liquid is accidentally spilled in the vicinity of the lock lever 35, the liquid may enter the case through the gap.
  • the liquid that has entered the case passes through, for example, the tooth surface or side surface of the first gear 32, passes through the tooth surface or side surface of the second gear 38, and reaches the upper surface of the water repellent rib 82.
  • the upper surface of the water repellent rib 82 has a cylindrical shape and the left and right side surfaces have a labyrinth structure that makes it difficult for liquid to pass through, the liquid on the upper surface of the water repellent rib 82 is along the water repellent rib 82. It flows toward the rear first water shield rib end 83 or the front second water shield rib end 84.
  • FIG. 19 is a sectional view taken along the line AA of the interlock unit in FIG. 5A, showing a drainage route of the liquid that has entered the case. As shown by an arrow in FIG. 19, the liquid that has flowed backward from the upper surface of the water repellent rib 82 toward the first water repellent rib end 83 is dropped into the gutter 87 from the first water repellent rib end 83. A first liquid guide that is drained from the first drain port 88 to the outside of the case is provided.
  • a second liquid guide that is drained from the second drain port 92 to the outside of the case is provided.
  • the drainage rib 82, the drainage rib 82, the labyrinth structure provided with the first case rib 85 and the second case rib 86, the gutter 87, and the third case rib 89 described above are liquid guides. It has the effect of draining the liquid that has entered the inside of the case from the first drainage port 88 or the second drainage port 92 to the outside of the case 47 to prevent the liquid from flowing into the solenoid 41.
  • FIG. 5A is a top view showing an unlocked state of the interlock unit according to the first embodiment
  • FIG. 5B is a sectional view taken along line AA in FIG. 5A
  • FIG. 6 is a perspective view showing an unlocked state of the interlock unit
  • FIG. 7 is a perspective view.
  • the solenoid 41 is de-energized
  • the second gear 38 is rotated clockwise in FIG. 5B by the spring force of the pull spring 45
  • the plunger 42 is the connecting plate 40. It is in a state of being pulled out to the maximum from the solenoid 41 via.
  • the first gear 32 rotates counterclockwise in FIG.
  • the recess 49 has a T-shape when viewed from the upper surface so that the T-shaped lock lever 35 can be stored, and has a gap of, for example, about 1 mm from the periphery of the outer shape of the lock lever 35 so as not to interfere with the outer circumference of the lock lever 35. It is formed one size larger.
  • the lock portion 34 does not act on the lock receiving means 25 provided on the safety cover 4, so that it is in the unlocked state, and the user can freely open and close the safety cover 4.
  • FIG. 8 is a sectional view taken along line AA showing the locked state of the interlock unit in FIG. 5A
  • FIG. 9 is a perspective view showing the locked state of the interlock unit.
  • 10 is a sectional view taken along line BB in FIG. 8
  • FIG. 11 is a sectional view taken along line CC in FIG.
  • the states shown in FIGS. 8 to 11 indicate the locked state of the safety cover 4.
  • the plunger 42 is sucked by a force exceeding the spring force of the pull spring 45 by energizing the solenoid 41, and the connecting plate 40 and the connecting shaft 39 are brought close to the solenoid 41 via the drive pin 43.
  • the second gear 38 is rotated counterclockwise in FIG. 8 by moving in the direction of Since the first gear 32 meshes with the second gear 38, it rotates clockwise, and the support portion 33 and the lock portion 34 stand up from the work surface 22 and are behind the handle portion 27 of the safety cover 4.
  • the lock receiving base 30 abuts and stops.
  • EMI ElectroMagneticInterference
  • EMS ElectroMagnetic Susceptibility
  • FIG. 13 is a side view showing the locked state of the interlock unit.
  • the mounting bracket 59 is also located directly below the lock receiving means 25. .. Therefore, when the user applies an upward external force to open the locked safety cover 4, the external force is applied to the left side case 47a and the right side case from the lock portion 34 meshing with the lock receiving means 25 via the first support shaft 31. It is transmitted to 47b, and further transmitted to the mounting bracket 59 via the mounting seats 67a and 67b.
  • the left side case 47a and the right side case 47b are made of resin. Since it is made of plastic, it bends in the direction of opening each other as shown in FIG. Then, the tip of the first support shaft 31 is disengaged from the fitting of the recess, and the first support shaft 31 becomes a cantilever form, and the bending that occurs at the base of the first support shaft 31 is compared with the form of the double-sided beam. The stress becomes large and there is a risk of breakage.
  • the upper surface case 47c is configured to cover the upper surfaces of the left side case 47a and the right side case 47b, and the cross-sectional shape of the upper surface case 47c has a gap wider than the left and right widths of the left side case 47a and the right side case 47b.
  • a U-shaped case opening prevention portion 91 having a large size and an open lower surface was provided. That is, since the case opening prevention portion 91 is configured to be fitted from the outside so as to prevent the upper surfaces of the left side case 47a and the right side case 47b from being deformed in the left-right outer direction, even if an upward load is applied to the lock lever 35.
  • 15 and 16 are cross-sectional views taken along the line AA in the locked state of the locking means 26 of the safety cover 4, and are partially enlarged views in the vicinity of the lock lever portion.
  • the reaction force generated when the user tries to open the safety cover 4 in the locked state is the lock portion 34. Since the lock receiving means 25 works in a direction of attracting each other and approaching each other, the engagement between the lock portion 34 and the lock receiving means 25 is further strengthened, and the locked state can be reliably maintained.
  • FIG. 16 shows a case where, for example, the voltage applied to the solenoid 41 drops and the lock lever 35 does not rotate to the upright state shown in FIG. 15 but rotates to an angle ⁇ 2 smaller than a right angle. ..
  • the protrusion 51 abuts on the semi-cylindrical portion on the rear surface side of the lock portion 34, and the reaction force when the safety cover 4 is opened becomes the direction of the perpendicular line with respect to the contact surface, which is the first support. It acts in a direction separated from the shaft 31 by a radius R to generate a moment in a direction in which the lock lever 35 is close to the lock receiving base 30. Therefore, the lock lever 35 does not come off and can maintain the locked state.
  • the lock lever 35 has a substantially L-shaped shape in which the lock portion 34 is extended from the support portion 33 to one side, or a pair of lock portions 34 are extended from the support portion 33 to both sides. It constitutes a lock lever 35 having a substantially T-shape. The actions and effects of the substantially L-shaped shape and the substantially T-shaped shape will be described with reference to FIGS. 17A and 17B.
  • FIG. 17A shows a state in which the reaction force F when the safety cover 4 is to be opened is applied to the substantially L-shaped lock lever 35 in which the lock portion 34 protrudes only to the left from the support portion 33. Shown. Since the reaction force F is applied only to the left lock portion 34, a bending moment M that bends the lock lever 35 to the right is generated, and the lock lever 35 bends to the right and tries to move to the right, so that the lock portion 34 And the lock receiving means 25 are easily disengaged. Further, since the bending stress due to the bending moment M is generated in the support portion 33 in addition to the tensile stress due to the reaction force F, the stress generated in the lock lever 35 becomes large.
  • FIG. 17B shows a state in which a reaction force F when the safety cover 4 is opened is applied to the lock lever 35 having a substantially T-shape in the present embodiment.
  • the tensile force due to the reaction force F is dominant in the support portion 33, and the bending moment is small. Therefore, even if the reaction force F is the same, the stress generated in the lock lever 35 is smaller than that of the lock lever 35 having a substantially L-shape shown in FIG. 17A, and a more reliable automatic analyzer can be provided. effective.
  • FIGS. 18A and 18B are schematic views showing a state in which the safety cover 4 is fully shifted to the left with the interlock actuated, and an upward external force is applied to open the safety cover 4.
  • L1 is the inner width of the lock receiving means 25.
  • L2 is the width of the straight portion of the side of the lower surface of the lock portion 34 that comes into contact with the lock receiving means 25, and indicates the width of the straight portion of the tip of the lock portion 34 up to the front of the R portion.
  • the difference between FIGS. 18A and 18B is that in FIG.
  • L2 is small because the tip R of the lock portion 34 is large, while the width L1 of the lock receiving means 25 is large, indicating the relationship L1> L2. ..
  • L2 is large because the tip R'of the lock portion 34 is small, while the width L1 of the lock receiving means 25 is small, showing the relationship of L1 ⁇ L2.
  • FIG. 20 is a cross-sectional view taken along the line AA of the locked state of the safety cover locking means, which is a partially enlarged view of the vicinity of the lock lever portion, in which the operator moves forward to the handle portion 27 of the safety cover 4. It shows a state in which the safety cover 4 is bent and moved forward by applying a force toward. Since the lock receiving means 25 also moves forward together with the safety cover 4, it is desirable that the lock portion 34 further rotates by an angle ⁇ 3 so that the lock portion 34 moves forward rather than in the upright state of the lock lever 35, and the safety cover 4 bends. Even in this state, the lock portion 34 and the lock receiving means 25 are securely engaged.
  • the interlock unit 26 is arranged at the center of the front surface of the safety cover. Therefore, when the interlock unit 26 acts to lock the safety cover, the central portion is moved. Since it is locked, the main body cover is not easily deformed and bent even when a force in the opening direction is applied to the left and right sides of the safety cover, and a gap is hard to open between the main body and the lower end of the main body cover.
  • the lock receiving means 25 is configured to protrude rearward from the inside of the safety cover 4, and the lock lever 35 is rotated from the work surface 22 to the front surface of the safety cover 4 from the inside to the front to act on the lock receiving means 25. Since the lock receiving means 25 is configured to be locked, the amount of protrusion of the lock receiving means 25 can be reduced to reduce the size, and the lock receiving means 25 can have a smooth shape that is not a hook shape or a brim shape.
  • the lock receiving means 25 is arranged in contact with the rear of the handle portion 27, when the operator applies a force in the opening direction to the handle portion 27 during locking, the opening operation of the safety cover 4 is surely hindered. Suitable.
  • the lock lever 35 is configured to be on the same surface as the working surface 22, so that when the safety cover 4 is opened, the working surface 22 does not have a hook shape or a brim shape. Since the claw portion of the lock lever does not protrude, it does not interfere with cleaning the work surface 22 with a cleaning tool such as a cloth or a brush.
  • the recess for accommodating the lock lever 35 of the top cover 76 is bottomed to prevent liquids and foreign substances from falling from the recess.
  • FIG. 21 is a cross-sectional view showing an operation when the abnormally locked state of the interlock unit is released.
  • the lock lever 35 is formed through the gap between the lower surface 94 of the handle portion and the work surface 22.
  • the release piece 95 can be inserted from the front until it touches.
  • the lock lever 35 is rotated rearward around the first support shaft 31 via the release piece 95, and the lock portion 34 is moved from the lock receiving means 25. Since it can be separated, the safety cover 4 can be opened in that state.
  • the lock lever 35 can be unlocked even if the interlock unit 26 breaks down and does not operate in the locked state without having a special mechanical unlocking mechanism.
  • the safety cover 4 Prior to repairing or replacing the failed interlock unit 26, the safety cover 4 can be opened to replace the reagent or take out the sample.
  • the liquid that has entered the case through the gap around the lock lever 35 flows backward along the upper surface of the water repellent rib 82, drops from the water repellent rib end 97 onto the fourth case rib 98, and drains. The water is drained from 99 to the outside of the case 47.
  • the hall IC 100 for detecting magnetism is provided in contact with the lower surface of the upper surface cover 76, and the safety cover 4 is the lower surface of the handle portion of the safety cover 4. This is a point where the magnet 101 is provided at a position facing the hall IC 100 when it is closed.
  • the hall IC 100 detects magnetism and sends a signal, and when the safety cover 4 is opened, the magnet 101 is separated and the hall IC 100 does not detect magnetism, so that the signal is interrupted.
  • the opening / closing detection of the safety cover 4 can be built in the interlock unit 26, it is not necessary to separately provide an opening / closing detection element, and the wiring from the hall IC 100 and the wiring from the solenoid 41 are combined into one connector 54. Since it can be summarized in, the configuration becomes simple and the reliability can be further improved.
  • the lock receiving means 25 is not the back surface of the handle portion 27 of the safety cover 4, but the rear side of the lower front portion 102 of the safety cover in which the front surface of the handle portion 27 is extended downward. It is a point provided facing the.
  • the lock lever 35 is arranged below the work surface 22, and the lock portion 34 is provided between the work surface 22 and the front plate 56 of the housing 21 facing the lock receiving means 25. It projects from the front opening of the step portion 103 toward the rear surface of the lower front portion 102 of the safety cover and acts on the lock receiving means 25 to lock the safety cover 4.
  • the liquid that has entered from the periphery of the lock lever 35 flows forward along the upper surface of the drainage rib 96 provided on the connecting plate 40, and is planted from the inner front surface of the case 47 and the bottom surface of the case. Drops between the case rib 104 and the case rib 104, and is discharged from the drain port 99.
  • FIG. 31 is a block diagram showing a configuration of a part related to the driving operation of the interlock unit in the present embodiment.
  • a drive signal is sent from the host computer 200 that controls the overall operation of the automatic analyzer 1 to the driver 201 that drives the solenoid 41, power is supplied to the driver 201, and the solenoid 41 is based on the drive signal from the host computer 200.
  • the door open / close detection 202 is connected to the power supply 203 to supply power when the safety cover 4 is closed and shut off when the safety cover 4 is open.
  • the display means 204 can display the operating state of the automatic analyzer 1 or display an alarm when an abnormality is detected to notify the operator.
  • FIG. 32 is a flowchart showing the operation of the interlock unit according to the present embodiment.
  • step S101 determines whether or not the safety cover 4 is closed (step S102), and the determination is made. If the result is NO, the determination in step S102 is repeated until the determination result becomes YES.
  • step S102 determines whether the closure of the safety cover 4 is closed. If the determination result in step S102 is YES, that is, when the safety cover 4 is closed, the closure of the safety cover 4 is confirmed (step S103), the solenoid 41 is energized, and the safety cover 4 is closed. Lock (cover lock) (step S104).
  • the automatic analyzer 1 is operated to analyze the sample (step S105), and when the analysis is completed, the stop switch is operated to start the stop process (step S106).
  • step S107 It is determined whether or not the operation stop of each part of the automatic analyzer 1 has stopped (step S107). If the determination result is NO, the process of step S107 is repeated until the determination result becomes YES.
  • step S108 the energization of the solenoid 41 is cut off (step S108), and the process ends.
  • the solenoid 41 lock is released, the safety cover 4 can be opened and closed, so that samples and reagents can be taken out, replaced, and supplied.
  • the lock lever 35 is arranged so as to face the front-rear direction in parallel with the work surface 22 when the lock is released, and is locked on the upper surface case 47c provided on substantially the same surface as the work surface 22.
  • a recess for accommodating the lock lever 35 is provided when the lock lever 35 is released, and the upper surface of the lock lever 35 is flat and has a smooth shape so as to be flush with the work surface 22. Therefore, when the safety cover 4 is opened in the unlocked state, there is no protrusion from the work surface 22, and the operator opens the safety cover 4 to clean or replace various operating mechanism groups 29, clean the work surface 22, and use the reagent container.
  • an easy-to-use automatic analyzer can be provided because it does not get in the way when the work surface 22 is replaced and the cleaning tool such as a cloth or a brush does not get caught when cleaning the work surface 22.
  • the lock receiving means 25 provided so as to protrude from the rear surface of the safety cover 4 or the front side of the handle portion 27 has a smooth shape rather than a hook shape, so that a cleaning tool such as a cloth or a brush can be used. Since it does not get caught, it has the effect of providing an easy-to-use automatic analyzer.
  • the lock lever 35 has a substantially T-shape in which the lock portions 34 protrude from the support portion 33 on both the left and right sides, the reaction force F generated in the lock lever 35 when the safety cover 4 is opened is the support. Since the lock lever 35 is applied substantially symmetrically to the portion 33, no force is generated to move the lock lever 35 in either the left or right direction, and the lock lever 35 operates stably. Further, since the support portion 33 is configured such that the tensile stress is dominant and the bending moment is small, there is an effect that the stress is small and the automatic analyzer 1 with high reliability can be provided.
  • the safety cover 4 is opened in a state of being shifted to the left and right. Even when an upward external force is applied, the lock is not released, and there is an effect that the automatic analyzer 1 with high reliability can be provided.
  • the lock portion 34 is configured to rotate further by an angle ⁇ 3 so as to move forward from the upright state of the lock lever 35, the lock portion 34 and the lock receiving means 25 can be used even when the safety cover 4 is bent. There is an effect that it is possible to provide a highly reliable automatic analyzer 1 capable of reliably closing the safety cover 4 in a locked state.
  • the recess 49 provided in the upper surface case 47c for accommodating the lock portion 34 is bottomed to prevent liquids and foreign substances from falling from the recess 49, the structure is simple and highly reliable automatic analysis is performed. It has the effect of being able to provide the device.
  • lock lever 35 and the drive connecting means 53 are an interlock unit 26 covered with a case 47 made of a resin molded product, it is easy to assemble and replace each unit, and the structure is simple. It has the effect of being able to provide a highly reliable automatic analyzer.
  • a lock lever 35 which is an acting member is rotatably provided on the upper surface of the case 47 of the interlock unit 26, and a solenoid 41 which is an actuator is provided on the lower surface of the case 47, and a driving force is provided between the acting member and the actuator. Since the acting member, the drive connecting means 53, and the actuator are arranged in a vertical row, the projected area when viewed from above can be reduced, and the housing 21 can be downsized. Since the configuration is suitable and the dimensions in the front-rear direction can be reduced, there is an effect that the interlock unit 26 can be arranged in the rear portion near the front plate 56 of the housing 21 along the front plate 56.
  • the solenoid 41 which is an electromagnetic driving means, is provided below the case 47 by exposing it to the outside air, heat dissipation is better than when the solenoid 41 is arranged in the case, and even if the solenoid 41 is continuously energized. Since it does not overheat, a highly reliable interlock unit can be realized.
  • the case 47 includes a left side case 47a, a right side case 47b, and an upper surface case 47c, each of which is molded of resin, and the rotary support shafts 31 and 37 of the gear and the spring hook portion 44 are integrally molded with the case. ..
  • the first gear 32 and the lock lever 35 are integrated and the second gear 38 and the water repellent rib 82 are integrally molded, there is an effect that the number of parts can be reduced and the configuration can be inexpensive.
  • the left side case is also applied when the lock lever 35 receives an upward load.
  • the release piece 95 is inserted into the gap between the lower side of the safety cover 4 and the work surface 22 and the lock lever 35 is pushed from the front.
  • the lock lever 35 can be rotated backward to release the lock, and the safety cover 4 can be opened. Therefore, even if the interlock unit fails, the abnormal lock can be easily released, so that an easy-to-use automatic analyzer can be provided.
  • the interlock unit 26 is configured to be screwed to the mounting bracket 59 attached to the housing frame 55 from the front, it is easy to attach / detach and has good assembleability / maintainability. Furthermore, even if the lock lever 35 is stuck and does not return, it is configured so that it can be attached and detached via the front opening generated on the front surface when the front plate 56 of the housing is removed. Since the interlock unit 26 can be removed from the front and the lower part by removing the above, the unit can be replaced in a short time, and the maintainability is good.
  • the drive source connected to the drive connecting means 53 is the solenoid 41
  • the drive source is not limited to the solenoid, and may be a motor such as a stepping motor, a DC motor, or an AC motor, and further.
  • a reduction means such as a spur gear or a worm gear may be further provided between the motor and the lock lever.
  • an actuator operated by compressed air or hydraulic pressure may be used as a power source.
  • lock lever 35 that rotates around the axis in the left-right direction
  • the present invention is not limited to such a lock lever, and is projected and retracted in the up-down direction, the left-right direction, or the front-back direction. It may be a linear motion member that repeats the above steps, or it may be a rotary member that rotates around a rotation axis in the vertical direction.
  • the unit mounting surface 93 of the mounting bracket 59 and the mounting seat 67 of the interlock unit 26 are extended in the vertical direction, and the mounting screw 61 is described as being detached from the front in the horizontal direction.
  • the unit mounting surface 93 and the mounting seat 67 are not limited, and may be configured such that the upper end is inclined so as to be rearward from the lower end, and the screwdriver can be inserted from diagonally above to attach / detach the screw. ..
  • the solenoid 41 which is a driving means, is arranged below the lock lever 35, which is an acting member, and the interlock unit 26 is arranged vertically by the driving connecting means (driving connecting member) 53.
  • driving connecting means driving connecting member 53.
  • the case where the lock lever 35 and the solenoid 41 are connected to each other and the lock lever 35 is driven by the solenoid 41 has been described as an example, but the present invention is not limited to this, and the solenoid 41 is arranged behind the lock lever 35 to drive the lock lever 35.
  • the present invention can also be applied when an interlock unit connected by the connecting means 53 is used.
  • reagent container loading port 21 ... Housing, 22 ... Work surface, 22a ... Work surface opening, 23 ... Safety cover front surface, 24 ... Safety cover front side, 25 ... Lock receiving means, 26 ... Locking means (interlock unit), 27 ... Handle part, 28 ... Cover support shaft, 29 ...
  • Various operation mechanism groups 30 ... Lock receiving base, 31 ... First support shaft, 32 ... First gear, 33 ... Support part 33, 34 ... Lock part, 35 ... Lock lever, 36 ... cover part, 37 ... second support shaft, 38 ... second gear, 39 ... connecting shaft, 40 ... connecting plate, 41 ... solenoid, 42 ... plunger, 43 ... drive pin, 44 ... first spring hooking part , 45 ... Pull spring, 46 ...
  • Second spring hook 47 ... Case, 47a ... Left case, 47b ... Right case, 47c ... Top case, 47d ... Case peripheral ribs, 48 ... Cylindrical part, 49 ... Recess, 50 ... bottom surface, 51 ... protrusion, 52 ... lock lever cover, 53 ... drive connecting means, 54 ... connector, 55 ... housing frame, 56 ... front plate, 57 ... side plate, 58 ... back plate, 59 ... mounting bracket, 60 ... Mounting groove, 61 ... Mounting screw, 62 ... Driver, 63 ... First support bearing part, 64 ... Second support shaft support part, 65, 65a, 65b ... Side wall part, 66 ...

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CN113661394A (zh) 2021-11-16
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JP7138783B2 (ja) 2022-09-16
CN113661394B (zh) 2024-06-18
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US12392788B2 (en) 2025-08-19
US20220178955A1 (en) 2022-06-09

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