JPS6329254Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention is a device for cleaning sample suction pipes in devices that perform fractionation of relatively viscous samples such as automatic blood analyzers. A sample suction pipe cleaning device that cleans the inside and outside of the sample suction pipe to prevent cross contamination, and the cleaning liquid supply device is housed inside the device when it is not needed, simplifying the configuration of the device. It is.

[Conventional technology]

In conventional automatic analysis, it was possible to automate sample feeding for each sample when the viscosity of the sample was low or when the sample was relatively uniform. In automatic analyzers that analyze samples with high
It was necessary to wipe around the sample suction pipe and clean the inside of the sample suction pipe. For this reason, conventional methods have been used such as passing a cleaning liquid through the sample suction pipe or co-washing the sample with the beginning of the next sample.

[Problem that the invention attempts to solve]

However, the above-mentioned conventional method was time-consuming and the device thereof had a complicated structure. Furthermore, it has been impossible to supply relatively highly viscous samples such as blood using a sample loader and aspirate them one after another.

The present invention was developed in view of the above points, and it automatically cleans the sample suction pipe to prevent cross-contamination between samples, and also prevents the operation of other devices such as the sample container lifting device. The object of the present invention is to provide a cleaning device for a sample suction pipe that does not obstruct the operation of the sample suction pipe.

[Means for solving problems]

The sample suction pipe cleaning device of the present invention will be described with reference to the drawings. The cylinder 1 is rotatably supported on the device body by a first rotation pin 3, and the cylinder 1 is rotatably supported on the device body by a second rotation pin 3. a rotating member 5 rotatably supported by a pin 7 and connected at the other end to the piston shaft 4 of the cylinder via a connecting pin 6;
The rotating member is arranged so that when the piston shaft of the cylinder is retracted (contracted), it is located in the vertical direction or approximately vertical direction, and when the piston shaft of the cylinder is extended (advanced), it is located in the horizontal direction or approximately horizontal direction. When the cleaning liquid supply pipe 8 is fixed and the cleaning liquid supply pipe is positioned horizontally or approximately horizontally at the tip of the cleaning liquid supply pipe, the opening 10 is opened.
A cleaning liquid container 11 is connected and fixed so as to face upward, and a sample suction pipe 12 is eccentrically rotated so that the lower part of the sample suction pipe 12 is located in the cleaning liquid container when the piston shaft of the cylinder is extended. The second rotating pin 7 is located at a position offset from the central axis of the cylinder 1.

[Effect]

When the cylinder 1 is actuated to push out the piston shaft 4, the cylinder rotates about the first rotation pin 3, as shown in FIG. When the piston shaft 4 is fully extended, the cleaning liquid container 11 is pushed up so that the opening 10 faces upward, as shown in FIG.
The sample suction pipe 12 is located inside the cleaning liquid container 11, and at the same time, the cleaning liquid is supplied into the cleaning liquid container 11 via the cleaning liquid supply pipe 8. Next, the sample suction pipe 12 is vibrated and rotated, and the sample suction pipe 12
The cleaning liquid is sucked into the inside of the sample suction pipe 12.
is cleaned inside and out.

〔Example〕

Hereinafter, embodiments of the present invention will be described based on the drawings. FIGS. 1 to 3 are explanatory views showing the structure and operation of an embodiment of the apparatus of the present invention, and FIGS. 4 to 6 are explanatory views showing an example of the sample stirring and suction apparatus.
Reference numeral 1 denotes a cylinder such as an air cylinder or an oil cylinder. This cylinder 1 is rotatably supported on the frame of the device main body 2 by a first rotation pin 3, and the tip of a piston shaft 4 is connected to a rotation member 5. Connected via pin 6. This rotating member 5 is
For example, it has an L-shape, and one end is connected to the tip of the piston shaft 4 via a connecting pin 6, and the other end is connected to the frame of the device main body 2 via a second rotation pin 7. A second rotation pin 7 for supporting the rotation member 5 is provided at a position away from the central axis of the cylinder 1 (in FIG. 1, above the extension of the central axis of the cylinder 1). Further, as shown in FIG. 1, when the piston shaft 4 of the cylinder 1 is most retracted (contracted), it is located in the vertical direction or approximately vertical direction, and as shown in FIG. 3, the piston shaft 4 of the cylinder 1 is The rotating member 5 is arranged so that it is located in a horizontal direction or a substantially horizontal direction when it is most extended (advanced).
A cleaning liquid supply pipe 8 is fixedly penetrated through. Further, a cleaning liquid container 11 is connected to the tip of the cleaning liquid supply pipe 8 so that the opening 10 faces upward when the cleaning liquid supply pipe 8 is positioned horizontally or approximately horizontally as shown in FIG. Fixed. This cleaning liquid supply pipe 8 is connected to a cleaning liquid supply source (not shown) within the apparatus. Furthermore, when the piston shaft 4 of the cylinder 1 is extended as shown in FIG. provided.

This sample agitation suction device is shown in Figures 4 to 4 as an example.
As shown in FIG. 6, the sample suction pipe 12 connected to the quantitative section of the automatic analyzer main body is
A pulley 14 is fixed to the upper part of this outer cylinder 13, and this pulley 14 and a pulley 16 connected to the rotating shaft of the motor 15 are connected by a belt 17 to drive the motor 15. When the sample suction pipe 12 is rotated, both pulleys 16 and 14 are rotated to rotate the outer cylinder 13 and eccentrically rotate the sample suction pipe 12, thereby increasing the stirring effect.

FIG. 1 shows the piston shaft 4 of the cylinder 1 in its most retracted state. The sample loader 1 moves toward the cleaned sample suction pipe 12.
The sample container 21 is raised and lowered by the sample container lifting device 22 for raising and lowering the sample container 21 containing each sample 20 placed on the sample 8 to a position where it can be aspirated, and the motor 15 is rotated. The sample suction pipe 12 is eccentrically rotated to instantaneously stir the sample 20. Thereafter, the sample 20 is aspirated and sequentially transferred to subsequent systems for analysis. When the sample suction is finished, the sample container 21 is lowered by the sample container lifting device 22, and then a cleaning operation is performed as follows. First, when the cylinder 1 was operated and the piston shaft 4 was pushed out, the first rotation pin 3 for supporting the cylinder 1 and the second rotation pin 7 for supporting the rotation member 5 were removed from the central axis of the cylinder 1. position, and since the rotating member 5 has an L-shape and the piston shaft 4 and the rotating member 5 are connected only by the connecting pin 6, the cylinder 1 is in the position shown in FIG. The rotation member 5 rotates around the first rotation pin 3, while the rotation member 5 rotates around the second rotation pin 7. At this time, since the cylinder 1 is made of a relatively heavy material, the rotating member 5 mainly rotates preferentially. When the piston shaft 4 is fully extended, the cleaning liquid container 11 is pushed up so that the opening 10 faces upward as shown in FIG. The cleaning liquid is supplied into the cleaning liquid container 11 through the cleaning liquid container 11. Then motor 15
When rotated, the sample suction pipe 12 vibrates and rotates, and the cleaning liquid is sucked into the sample suction pipe 12, thereby cleaning the inside and outside of the sample suction pipe 12. As the cleaning liquid, for example, a diluted blood liquid is used during normal measurement, and at the end of the measurement, one containing a detergent or the like having a strong cleaning effect is used again.

When cleaning is completed, the cylinder 1 is actuated, the piston shaft 4 is moved back, the cleaning liquid container 11 is stored in the original position, and at the same time, the excess cleaning liquid is returned through the cleaning liquid supply pipe 8. Thereafter, the sample container 21 containing the sample 20 is transported to the position of the sample suction pipe 12 as described above, and after the sample 20 is stirred by the rotation of the outer cylinder 13, the sample 20 is suctioned.

[Effect of idea]

As explained above, the sample suction pipe cleaning device of the present invention can push the cleaning liquid container up to the position of the sample suction pipe with a single cylinder, and can be stored inside the device when not needed. The structure is extremely simple, and in combination with the eccentrically rotating sample suction pipe, it has the effect of reliably cleaning the inside and outside of the sample suction pipe.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention. Fig. 1 is a front explanatory view showing a state in which the piston shaft of the cylinder is retracted in the sample suction pipe cleaning device of the present invention, and Fig. 2 is an explanatory plan view of the same (but cleaning liquid container,
3 is a front explanatory view showing the state in which the piston shaft of the cylinder is extended (advanced) in the sample suction pipe cleaning device of the present invention, and FIG. 4 is a front view of the sample stirring and suction device. FIG. 5 is a plan view showing an example, FIG. 5 is a front view of the same, and FIG. 6 is an enlarged sectional view taken along the line A--A in FIG. 5. 1...Cylinder, 2...Device main body, 3...First
Rotating pin, 4... Piston shaft, 5... Rotating member, 6... Connection pin, 7... Second rotating pin, 8
...Cleaning liquid supply pipe, 10...Opening, 11...
Cleaning liquid container, 12...Sample suction pipe, 13...
Outer cylinder, 14...Pulley, 15...Motor, 16...
...Pulley, 17...Belt, 18...Sample loader, 20...Sample, 21...Sample container, 22...
...Sample container lifting device.

Claims (1)

[Scope of utility model registration request] A cylinder rotatably supported on the device body by a first rotation pin, one end rotatably supported on the device body by a second rotation pin, and the other end connected to the piston shaft of the cylinder via a connecting pin. and a rotating member connected to the rotary member such that the piston shaft of the cylinder is located vertically or approximately vertically when the piston shaft is retracted, and is located horizontally or approximately horizontally when the piston shaft of the cylinder is extended. A cleaning liquid supply pipe fixed to a moving member and a cleaning liquid fixed to the tip of the cleaning liquid supply pipe in communication with each other so that the opening faces upward when the cleaning liquid supply pipe is positioned horizontally or in a substantially horizontal direction. a sample agitation suction device having an eccentrically rotating sample suction pipe that is provided such that a lower part of the sample suction pipe is located in the cleaning liquid container when the piston shaft of the cylinder is extended; A cleaning device for a sample suction pipe, characterized in that the rotation pin is located at a position offset from the central axis of the cylinder.