JP3481732B2 - Automatic analyzer - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention dispenses a test sample or a reagent into a reaction cell by a probe provided on a spindle that moves up and down and rotates through a dispensing arm, and measures the test sample. The present invention relates to an automatic analyzer that measures the component amounts of items.

[0002]

2. Description of the Related Art In an automatic analyzer, a dispensing arm that rotates and moves up and down when a sample (sample) is dispensed from a sample container to a reaction cell or when a reagent is dispensed from a reagent container to a reaction cell. Dispensing probe fixed to is used.

First, the dispensing arm is rotated so that the dispensing probe is located on the opening of the sample container or on the opening of the reagent container, and when this rotation is completed, the dispensing arm is lowered to dispense. The tip of the injection probe is immersed in the sample or reagent in the sample container, and the sample or reagent is sucked into the dispensing probe by a suction operation by a vacuum pump or the like.

Here, when the dispensing arm is raised and the dispensing probe is pulled out from the sample container or the reagent container, the dispensing arm is rotated so that the dispensing probe is located above the opening of the reaction cell, When this rotation is completed, the dispensing probe descends, the tip of the dispensing probe enters the reaction cell,
Dispense a predetermined amount of sample or reagent into the reaction cell.

When this dispensing is completed, the dispensing arm rises and the dispensing probe comes out of the reaction cell. Since the tip of the dispensing probe is immersed in the specimen or the reagent, the specimen or the reagent adheres to the tip portion of the dispensing probe.
Therefore, when the tip of the dispensing probe is immersed in the sample or reagent and then the dispensing arm is raised or rotated, the sample or reagent attached to the tip of the dispensing probe is scattered depending on the operating state of the dispensing arm. There is a risk of

When the sample or reagent attached to the tip of such a dispensing probe scatters, and the scattered solution mixes into other reaction cells, sample containers, and reagent containers, contamination (contamination) occurs and dispensing is performed. The accuracy decreases.

Therefore, in the conventional automatic analyzer, (1) the operation speed of the dispensing arm is slowed down as a whole. (2) Use a motor with low torque ripple. For example, the 2-phase stepping motor is changed to a 5-phase stepping motor. (3) Install a damper to absorb the impact of rotation on the opposite shaft to which the dispensing arm of the dual shaft output type stepping motor is not connected. (4) Reduce the number of start-up pulses of the stepping motor. That is, the starting acceleration of the stepping motor is reduced. (5) Change gear drive to belt drive. Various scattering measures such as are taken. In addition, Japanese Patent Laid-Open No. 3-
Japanese Patent No. 261841 describes a case in which a repulsive rubber and a leaf spring inside the gear are used to prevent scattering.

[0008]

However, none of the above-mentioned scattering prevention measures in the conventional automatic analyzers has a low scattering prevention effect and the scattering prevention effect against vibrations when the dispensing arm is driven at high speed. Limited, inspection (measurement)
There was a problem that it could not cope with high speed processing of.

Further, in the scattering prevention measure disclosed in Japanese Unexamined Patent Publication No. 3-261841, since a repulsive rubber and a leaf spring embedded in the gear are incorporated, the structure becomes complicated, which hinders downsizing of the automatic analyzer. there were. Further, the gear having the repulsive rubber and the leaf spring incorporated therein has a problem that the effect is small against the impact in the axial direction.

Therefore, according to the present invention, it is possible to prevent the scattering of the sample or the reagent that occurs when the dispensing arm is driven and at the moment when the dispensing arm is stopped. It is an object of the present invention to provide an automatic analyzer that can be designed.

[0011]

According to a first aspect of the present invention, a test sample or reagent is dispensed to a reaction cell by a probe provided on a vertically movable and rotating spindle through a dispensing arm. In the automatic analyzer for analyzing the reaction liquid in the reaction cell, a rotary drive source, a conversion mechanism for converting the rotary motion of the rotary drive source into vertical motion, and a buffer for the vertical motion part of the conversion mechanism. And a transmission mechanism for transmitting vertical movement to the support shaft.
In a second aspect of the present invention, a test sample or a reagent is dispensed into a reaction cell by a probe provided via a dispensing arm on a spindle that moves up and down and rotates, and the reaction solution in the reaction cell is dispensed. The automatic analyzer for analysis includes a vertical movement mechanism for vertically moving the support shaft, and the vertical movement portion of the vertical movement mechanism and the support shaft are connected via a buffer. According to a third aspect of the present invention, a test sample or a reagent is dispensed into a reaction cell by a probe provided on a spindle that moves up and down and rotates through a dispensing arm, and the reaction solution in the reaction cell is dispensed. In an automatic analyzer for analysis, a rotation mechanism that rotates the support shaft, and a rotation transmission unit that connects the rotation mechanism and the support shaft and transmits the rotation of the rotation mechanism to the support shaft. The rotation transmitting portion is formed of a cushioning body, and the cushioning body sandwiches the rotation portion of the rotation mechanism from above and below, and the cushioning body prevents positional displacement in the rotation direction. It is characterized in that it has a protrusion for.

[0012]

[0013]

[0014]

[0015]

[0016]

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a perspective view showing a schematic configuration of an automatic analyzer to which the present invention is applied. The disk-shaped reaction disk 1 in which a plurality of reaction cells are arranged on the circumference performs an intermittent rotation operation in which the reaction disk 1 rotates by a predetermined angle and stops in a certain fixed cycle. A disk-shaped sample disk 2 in which a sample cup (or a blood collection tube, not shown) in which a sample (test sample) is stored is set in a circular shape is arranged at a predetermined interval in the vicinity of the reaction disk 1. Has been done. A reagent container 3 in which reagent bottles containing a plurality of reagents that respectively react with various components of a sample are set in a circular shape is overlapped with the reaction disk 1 on the circumference, and a shape in which the portion is cut ( C shape).

The sample disc 2 is rotated by a predetermined designation control so that a sample cup (a blood collection tube) as a designated container set on the sample disc 2 is positioned at a predetermined position.

A sample arm 4 is arranged between the reaction disk 1 and the sample disk 2, and a sampling probe is attached to the tip thereof. The sample arm 4 has its sampling probe positioned on a sample cup set at a predetermined position of the sample disk 2, and the sample in the sample cup is
A predetermined amount of (test sample) is sucked, and when the suction is completed, the sample is rotated to position the sampling probe on the sample dispensing position of the reaction disk 1 and set at the sample dispensing position. A predetermined amount of the sample is dispensed into an existing reaction cell.

Further, the sample arm 4 positions the sampling probe on the supernatant dispensing position of the reaction disk 1 and sucks the supernatant of the reaction cell set at the supernatant dispensing position, When suction is completed, it will rotate,
The sampling probe is positioned above the sample dispensing position, and the supernatant is dispensed into the reaction cell set at the sample dispensing position.

A reagent dispensing arm 5 is arranged at the center of the circumference of the reagent container 3 in which the reagent bottle is set, and a reagent dispensing probe is attached to the tip thereof. The reagent dispensing arm 5 positions the reagent dispensing probe on a designated reagent bottle of the reagent storage 3, sucks a predetermined amount of the reagent in the reagent bottle, and rotates when the suction is completed. Then, the reagent dispensing probe is positioned on the reagent dispensing position of the reaction disk 1, and the reagent is dispensed into the reaction cell set at the dispensing position by a preset amount.

In the vicinity of the outer periphery of the reaction disk 1, a stirring arm 6 having a stirrer attached to the tip is arranged, and the stirring arm 6 is inside the reaction cell in which the stirring position of the reaction disk 1 is set. The sample of 1 is agitated by an agitator.

Further, a cleaning unit 7 is arranged near the outer circumference of the reaction disk 1, and a cleaning probe, a drying probe, etc. are attached to the cleaning unit 7. The cleaning unit 7 is configured to perform cleaning or drying with respect to each reaction cell set at the cleaning position of the reaction disk 1 by a cleaning probe or a drying probe.

A photometric section 8 is provided at one location on the reaction disk 1. The photometric unit 8 includes a light emitting unit,
The reaction cell set at the photometric position of the reaction disk 1 is irradiated with light from the light emitting portion, the amount of transmitted light is measured, and the amount of change of the sample in the reaction cell due to the reagent is measured. There is. Based on this measured amount of change, sample component analysis (quantitative analysis / qualitative analysis) can be performed. The reaction disk 1 has a constant temperature bath (constant temperature water bath) structure for keeping the temperature of the reaction cell at a preset temperature.

FIG. 2 is a perspective view showing a basic schematic configuration of the sample arm 4 and the reagent dispensing arm 5. Dispensing arm (sample arm or reagent dispensing arm)
A probe (sample probe or reagent dispensing probe) 12 is fixed to the tip of 11 perpendicularly to the axial direction of the dispensing arm 11. The end of the dispensing arm 11 is fixedly supported on the upper end of a spline shaft 13 provided perpendicularly to the axial direction of the dispensing arm 11.

A rotating mechanism 14 is fixed substantially in the middle of the spline shaft 13, and a pulley 15 (hereinafter referred to as a spline-side pulley 15) is concentrically provided on the rotating mechanism 14. This spline side pulley 15
And fixed to the frame (not shown) of the automatic analyzer,
Stepping motor 16 that constitutes the drive source of the rotating mechanism
A belt 18 (hereinafter referred to as a rotation belt 18) is hung between a pulley 17 (hereinafter referred to as a motor side pulley 17) fixed to a rotation shaft of a rotation stepping motor 16 (hereinafter referred to as a rotation belt 18). The spline-side pulley 15 is rotated in association with the rotation of the motor-side pulley 17.

The lower end of the spline shaft 13 is a block 1
A ball screw 20 has a nut 21 fixed to the block 19. Further, a rotation shaft of a stepping motor 22 (hereinafter, referred to as a vertical movement stepping motor 22) fixed to a frame (not shown) of the automatic analyzer is directly connected to the ball screw 20, so that the ball screw 20 rotates. By doing so, the nut 21 moves up and down, and accordingly, the block 19 moves up and down.

FIG. 3 is a cross-sectional view showing the detailed construction of a conversion mechanism for converting the rotational movement of the spline shaft 13, the block 19, the ball screw 20, and the nut 21 into a linear movement. The spline shaft 13 is rotatably supported by the block 19 via a pair of bearings 31 and 32.

On the other hand, the main body of the nut 21 is passed through a through hole 19-1 formed in the block 19, and the nut 2
The anti-vibration rubber members 33 and 34 sandwiching the flange 21-1 of No. 1 from above and below are sandwiched by the stop plate 35 with screws and nuts,
The block 19 is fixed to the nut 21.

In the first embodiment having such a structure, when the dispensing arm 11 is moved up and down, the vertical movement (rotation) of the stepping motor 22 for vertical movement is started, rotation is accelerated and decelerated, and rotation is stopped. Axial impact (vibration
) Is generated, and this impact is caused by the ball screw 20 and the nut 21.
Be transmitted to. However, since the flange 21-1 of the nut 21 and the block 19 (stop plate 35) are fixed via the anti-vibration rubber members 33, 34, the impact is absorbed by the anti-vibration rubber members 33, 34. The impact transmitted to the block 19 is small.

Therefore, in the mechanism connected from the block 19 to the spline shaft 13, the dispensing arm 11 and the probe 12, the impact (vibration) caused by the driving of the vertical movement stepping motor 22 causes the vibration-proof rubber member 33, It is made smaller by 34, and the vibration of the tip of the probe 12 is prevented.

As described above, according to the first embodiment, the flange 21-1 of the nut 21 for converting the rotation of the ball screw 20 into the vertical movement is sandwiched by the anti-vibration rubber members 33 and 34 from the vertical direction, and the anti-vibration is performed. By fixing the block 19 that rotatably supports the spline shaft to which the dispensing arm 11 is fixed via the rubber members 33 and 34, the ball screw 2
0 and the impact generated on the nut 21 against the vibration-damping rubber members 33, 3
4, the shock transmitted to the dispensing arm 11 can be reduced.

As a result, it is possible to prevent the scattering of the sample or the reagent that occurs at the moment when the dispensing arm 11 is driven up and down and when it is stopped. In addition, the anti-vibration rubber member 33,
Since a simple structure with only 34 is provided, it does not hinder the downsizing of the device, and the acceleration change at the time of vertical movement start / stop of the dispensing arm 11 is smooth, so that the dispensing arm 11 The average speed can be increased, and high-speed inspection processing can be achieved.

A second embodiment of the present invention will be described with reference to FIG. The difference between the second embodiment and the above-described first embodiment is that, as shown in FIG.
A plurality of compression springs 41, 42, 4 instead of the vibration-proof rubber members 33, 34 for fixing the nut 21 and the block 19 with the flange 21-1 of the nut 21 interposed therebetween.
3, 44, ... Are used. Since other configurations are almost the same, the same reference numerals are given to the same members and the description thereof will be omitted.

In the second embodiment having such a structure, when the dispensing arm 11 is moved up and down, the nuts are generated when the stepping motor 22 for vertical movement starts rotating, when accelerating and decelerating the rotation, and when stopping the rotation. Vertical direction transmitted to 21
The impact (vibration) of (rotation axis direction) is caused by the compression springs 41, 4
The impact that is absorbed by 2, 43, 44, ... And is transmitted to the block 19 is small. As described above, according to the second embodiment, it is possible to obtain the same effect as that of the first embodiment described above.

A third embodiment of the present invention will be described with reference to FIG. In the first embodiment described above, the rotary motion of the stepping motor 22 for vertical movement is controlled by the ball screw 2.
The vertical movement (linear movement) is converted by using the 0 and the nut 21, whereas in the third embodiment, the rotary movement of the vertical movement stepping motor 22 is vertically moved by using a pulley and a belt. It is converted into movement. Since other configurations are almost the same, the same reference numerals are given to the same members and the description thereof will be omitted.

FIG. 5 is a view showing the structure of the vertical movement mechanism of the spline shaft 13. The spline shaft 13 is 1
The block 51 is rotatably supported by the block 51 through a pair of bearings 31 and 32. The block 51 is vertically sandwiched by ring-shaped anti-vibration rubber members 52 and 53, and the anti-vibration rubber members 52 and 53 are further sandwiched by an upper stop plate 54 and a lower stop plate 55 with screws and nuts.

The upper stop plate 54 and the lower stop plate 55 are formed integrally with the mounting plate 56, and the mounting plate 56 is used for the belt 5
7 (hereinafter, referred to as a vertical movement belt 57). For example, the mounting plate 56 is composed of two plate-shaped members, and one plate-shaped member is an integral member with the upper stop plate 54,
The other plate-shaped member is an integral member with the lower stop plate 55. When the vertical movement belt 57 is sandwiched between these plate-like members and the plate-like member is fastened and fixed with screws or the like, the mounting plate 56 is fixed to the vertical movement belt 57.

Although not shown, the vertical movement belt 57 is formed endlessly and is stretched between two rotatably provided pulleys. The rotary shaft of the vertical stepping motor 22 is connected to the rotary shaft of one of the two pulleys.

In the third embodiment having such a structure, when the dispensing arm 11 is moved up and down, the stepping motor 22 for vertical movement is rotated at the time of starting the rotation, accelerating and decelerating, and stopping the rotation. The shock (vibration) in the vertical direction (rotational axis direction) transmitted to the mounting plate 56, the upper stop plate 54, and the lower stop plate 55 via the motion belt 57 is
The impact absorbed by 2, 53 and transmitted to the block 51 and the spline shaft 13 is reduced. As described above, according to the third embodiment, it is possible to obtain the same effect as that of the first embodiment described above.

A fourth embodiment of the present invention will be described with reference to FIG. Note that the difference between the fourth embodiment and the first to third embodiments described above is the structure of the rotating mechanism 14, and since the other configurations are almost the same, the same member is used. Are denoted by the same reference numerals and the description thereof will be omitted.

FIG. 6 (b) is a sectional view showing the rotating mechanism 14, and FIG. 6 (a) is a sectional view taken along the line AA of FIG. 6 (b). A spline outer cylinder 61 is fixed to the spline shaft 13, and a key 6 is attached to the spline outer cylinder 61.
2 (hereinafter referred to as the spline side key 62) is fixed. A holder 63 is provided outside the spline outer cylinder 61.
Is installed. The holder 63 has a groove for accommodating the spline side key 62 and an opening for accommodating three keys 64 (hereinafter, referred to as a connecting key 64). The connecting key 64
As shown in FIG. 6 (c), the metal plates 64-2, 6 are provided on both sides of the plate member 64-1 formed of vibration-proof rubber in the rotation direction.
It has a three-layer structure sandwiched by 4-3.

A spline pulley 15 is fixed to the outside of the holder 63 and the connecting key 64.
That is, the portion of the connecting key 64 projecting from the holder 63 is accommodated in the groove formed inside the spline pulley 15, and the spline outer cylinder 61 is vertically disc-shaped from the vibration isolating rubber member 65. , 66, and the anti-vibration rubber members 65, 66 are vertically sandwiched by the bottom portion of the inner surface of the spline pulley 15 and the stop plate 67. The stop plate 67 is fixed to the spline-side pulley 15 with a screw.

The lower portion of the spline-side pulley 15 is 1
The base member 70 is axially supported by a pair of bearings 68 and 69, and the rotating stepping motor 16 is fixed to the base member 70.

In the fourth embodiment having such a structure, when the dispensing arm 11 is rotated, when the rotation stepping motor 16 starts rotating, when the rotation acceleration / deceleration is performed,
When the rotation is stopped, a shock (vibration) is generated in the rotating direction, and this shock is transmitted to the motor side pulley 17, the rotating belt 18 and the spline side pulley 15.

However, since the turning force of the spline-side pulley 15 is transmitted to the spline outer cylinder 61 via the spline-side key 62, the holder 63, the connecting key 64 and the vibration-proof rubber members 65 and 66, The impact is absorbed by the connecting key 64 and the anti-vibration rubber members 65 and 66, and the impact transmitted to the spline outer cylinder 61 is reduced.
The anti-vibration rubber members 65 and 66 absorb the impact of rotation by generating a twist.

Therefore, in the mechanism in which the spline outer cylinder 61 is connected to the spline shaft 13, the dispensing arm 11 and the probe 12, an impact (vibration) due to the driving of the rotating stepping motor 16 causes the connecting key 64. Also, the vibration damping rubber members 65 and 66 reduce the size of the vibration damping rubber members 65 and 66 to prevent vibration of the tip of the probe 12.

As described above, according to the fourth embodiment, the spline side pulley 15 and the spline outer cylinder 61 for transmitting the turning force generated by the turning stepping motor 16 to the spline shaft 13 are connected by the connecting key 64. The spline outer cylinder 61 is connected from above and below and the vibration-proof rubber member 6 is connected.
5 and 66, and the spline-side pulley 15 is fixed via the anti-vibration rubber members 65 and 66, so that the impact generated on the spline-side pulley 15 is absorbed by the connecting key 64 and the anti-vibration rubber members 65 and 66. Thus, the impact transmitted to the dispensing arm 11 can be reduced.

As a result, it is possible to prevent the scattering of the sample or the reagent that occurs when the dispensing arm 11 is driven to rotate and when the rotation is stopped. Further, since the structure can be made simple by only providing the connecting key 64 and the anti-vibration rubber members 65 and 66, it does not hinder the downsizing of the device, and also when the dispensing arm 11 starts rotating and stops. Since the change in acceleration is smoothed, the average speed of the dispensing arm 11 can be increased, and high-speed processing of inspection can be achieved.

A fifth embodiment of the present invention will be described with reference to FIG. The difference between the fifth embodiment and the fourth embodiment described above is the method of connecting the spline-side pulley 15 and the spline outer cylinder 61. That is, in the fifth embodiment, by improving the vibration damping rubber members 65 and 66 in the fourth embodiment, the vibration damping rubber members 65 and 66 and the connecting key 64 in the fourth embodiment are improved. While the rotational force was transmitted by and, the rotational force is transmitted only by the anti-vibration rubber member. The same members are designated by the same reference numerals and the description thereof will be omitted.

FIG. 7 (b) is a sectional view showing the rotating mechanism 14, and FIG. 7 (a) is a sectional view taken along line BB of FIG. 7 (b). A holder 81 is attached to the outside of the spline outer cylinder 61. A groove for accommodating the spline side key 62 is formed in the holder 81.

The spline side pulley 15 is fixed to the outside of the holder 81. That is, the lower end surface of the spline outer cylinder 61 is sandwiched by a disk-shaped lower vibration isolating rubber member 82, and the upper end surface thereof is sandwiched by a disk-shaped upper vibration isolating rubber member 83 having three protrusions. The rubber members 82 and 83 are vertically sandwiched between the bottom portion of the inner surface of the spline pulley 15 and the stop plate 67. The stop plate 67 is fixed to the spline-side pulley 15 with a screw.

Projections are formed on the lower surface of the upper anti-vibration rubber member 83 at intervals of approximately 120 °. The holder 81 and the spline pulley 15 are fitted with the projections. A groove is formed.

The lower portion of the spline-side pulley 15 is 1
The base member 70 is axially supported by a pair of bearings 68 and 69, and the rotating stepping motor 16 is fixed to the base member 70.

In the fifth embodiment having such a structure, when the dispensing arm 11 is rotated, when the rotation stepping motor 16 is started to rotate, when the rotation is accelerated or decelerated,
When the rotation is stopped, a shock (vibration) is generated in the rotating direction, and this shock is transmitted to the motor side pulley 17, the rotating belt 18 and the spline side pulley 15.

However, the turning force of the spline-side pulley 15 is transmitted to the spline outer cylinder 61 via the spline-side key 62, the holder 81, the lower anti-vibration rubber member 82 and the upper anti-vibration rubber member 83. So the shock is
The lower vibration damping rubber member 82 and the upper vibration damping rubber member 83 are absorbed by being twisted, and the shock transmitted to the spline outer cylinder 61 is reduced.

Therefore, in the mechanism in which the spline outer cylinder 61 is connected to the spline shaft 13, the dispensing arm 11 and the probe 12, an impact (vibration) due to the driving of the rotating stepping motor 16 causes a connection key 64. Also, the vibration damping rubber members 65 and 66 reduce the size of the vibration damping rubber members 65 and 66 to prevent vibration of the tip of the probe 12.

As described above, according to the fifth embodiment, the spline-side pulley 15 for transmitting the turning force generated by the rotating stepping motor 16 to the spline shaft 13 is attached to the lower end surface of the spline outer cylinder 61 so as to lower the vibration. With the rubber member 82,
The upper end surface is sandwiched by the upper vibration isolating rubber member 83, and the protrusion formed on the lower surface of the upper vibration isolating rubber member 83 is fitted into the groove formed on the holder 81 and the spline-side pulley 15. By fixing the spline-side pulley 15 via the side anti-vibration rubber member 82 and the upper anti-vibration rubber member 83, the impact generated in the spline-side pulley 15 is applied by the lower anti-vibration rubber member 82 and the upper anti-vibration rubber member 83. It is possible to absorb and reduce the impact transmitted to the dispensing arm 11.

As a result, the same effect as that of the above-described fourth embodiment can be obtained, and further, the connecting key 64 in the fourth embodiment can be omitted, and the structure is simpler. Since the number of parts can be reduced, miniaturization of the device can be promoted.

[0060]

As described above in detail, according to the present invention,
An automatic analyzer that can prevent the scattering of a sample or reagent that occurs when the dispensing arm is driven and when it stops, and that does not hinder the downsizing of the device and can speed up testing. Can be provided.

[Brief description of drawings]

FIG. 1 is a perspective view showing a schematic configuration of an automatic analyzer according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing a basic schematic configuration of a sample arm and a reagent dispensing arm of the automatic analyzer according to the same embodiment.

FIG. 3 is a spline shaft of the automatic analyzer according to the embodiment,
Sectional drawing which shows the detailed structure of the conversion mechanism which consists of a block, a ball screw, and a nut.

FIG. 4 is a cross-sectional view showing a detailed configuration of a conversion mechanism including a block, a ball screw and a nut of the automatic analyzer according to the second embodiment of the present invention.

FIG. 5 is a diagram showing a configuration of a vertical movement mechanism of a spline shaft of an automatic analyzer according to a third embodiment of the present invention.

FIG. 6 is a sectional view showing a rotating mechanism of an automatic analyzer according to a fourth embodiment of the present invention.

FIG. 7 is a sectional view showing a rotating mechanism of an automatic analyzer according to a fifth embodiment of the present invention.

[Explanation of symbols]

4 ... Sample arm, 5 ... Reagent dispensing arm, 11 ... Dispensing arm, 12 ... probe, 13 ... Spline shaft, 14 ... Rotation mechanism, 15 ... Spline side pulley, 16 ... Stepping motor for rotation, 19 ... Block, 20 ... Ball screw, 21 ... nuts, 22 ... Stepping motor for vertical movement, 33, 34, 52, 53, 65, 66 ... Anti-vibration rubber member, 41 to 44, ... compression springs, 61 ... Spline outer cylinder, 62 ... Spline side key, 64 ... key for connection, 82 ... Lower anti-vibration rubber member, 83 ... Upper anti-vibration rubber member.

Claims (3)

(57) [Claims] 1. An automatic system for dispensing a test sample or a reagent into a reaction cell by a probe provided on a vertically movable and rotating spindle via a dispensing arm, and analyzing the reaction solution in the reaction cell. In the analyzer, a rotary drive source, a conversion mechanism for converting the rotational movement of the rotary drive source into vertical movement, and a vertical movement part of the conversion mechanism connected to the vertical movement section via a buffer to vertically move the spindle. And an automatic transmission device for transmitting. 2. An automatic system for dispensing a test sample or a reagent into a reaction cell by a probe provided on a vertically movable and rotating spindle via a dispensing arm, and analyzing the reaction solution in the reaction cell. In the analyzer, an up-and-down moving mechanism for moving the support shaft up and down is provided, and an up-and-down moving part of the up-and-down moving mechanism and the support shaft are connected via a buffer body. 3. An automatic system for dispensing a test sample or a reagent into a reaction cell by a probe provided on a vertically movable and rotating support shaft via a dispensing arm, and analyzing the reaction solution in the reaction cell. The analyzer includes a rotation mechanism that rotates the support shaft, and a rotation transmission unit that connects the rotation mechanism and the support shaft and transmits the rotation of the rotation mechanism to the support shaft. The rotation transmitting portion is formed of a cushioning body, and the cushioning body sandwiches the rotation portion of the rotation mechanism from above and below, and the cushioning body has a protrusion for preventing displacement in the rotation direction. An automatic analyzer characterized by having a section.