JPS648308B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a nozzle device for inhaling and discharging serum as a sample in a biochemical analyzer that analyzes components in serum, for example.

In a biochemical analyzer, serum samples are placed in reaction containers such as test tubes or other cups and arranged at predetermined positions in the device, but the number of such containers is large, ranging from tens to hundreds. . Therefore, while inhaling the samples in these many containers, the water in the reaction containers will gradually evaporate, increasing the sample concentration, and there is a risk that a value different from what should be obtained may be obtained. . In order to prevent this, attempts have been made to provide a breakable covering member, such as Parafilm (registered trademark), at the mouth of the container to prevent sample evaporation, but this has become an obstacle and caused the nozzle to become clogged. Problems started to arise. In other words, the tip of the sampling nozzle is usually 1 mm.
Since the tip is shaped like a circular blade with a small diameter, as the parafilm is repeatedly pierced with such a nozzle, the circularly cut fragments will end up at the tip of the sampling nozzle. It had the disadvantage that it could get into or cover the opening, causing the nozzle to become clogged.

The present invention has been made to eliminate the above-mentioned drawbacks, and a mechanism for breaking the parafilm is added to the sampling nozzle.

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

First, in order to break through the parafilm placed over the container, a sampling nozzle 2 for inhaling the sample is inserted into the parafilm breaking mechanism 1 that covers the mouth of the cylindrical container, which has a sharp tip and bisects from the center. Deploy. Also, the above sampling nozzle 2
A Teflon tube 3 is connected to the upper end of the tube, and the tip thereof is connected to a serum suction/discharge pump (not shown). Further, a sampling nozzle vertical movement fitting 4 fixed to the sampling nozzle 2 is connected to a motor 7 via a rack 5 and a pinion 6. Breaking mechanism opening/closing tools 8 are fixed to the breaking mechanism 1 on the left and right sides, and a release 9 for opening/closing the breaking mechanism is connected thereto. This breaking mechanism opening/closing release 9 is connected to a motor 14 via pulleys 10, 11, 12, and 13. Incidentally, springs 15 and 16 are arranged at both ends of the breaking mechanism opening/closing tool 8, and serve to close the breaking mechanism 1. Next, the vertical movement of the breaking mechanism 1 is connected to a motor 20 via a rack 18 and a pinion 19 connected to a breaking mechanism vertical movement fitting 17 having the structure shown in the figure.

Next, the operation of the above configuration will be explained with reference to FIG. 3 in addition to FIGS. 1 and 2. First, when the container 22 containing the sample 21 is placed under the nozzle (the state shown in FIG. 3A), the breaking mechanism vertically movable fitting 17 begins to descend as the motor 20 rotates. When the breaking mechanism 1 breaks through the parafilm 23 and descends to a point where it does not enter the sample 21, it stops there [the state shown in FIG. 3b]. Next, the breaking mechanism opening/closing release 9 is pulled by the rotation of the motor 14, and the breaking mechanism opening/closing tool 8 connected thereto opens left and right, and the breaking mechanism 1 fixed thereto also opens. This opening operation stops when the opening exceeds the thickness of the sampling nozzle 2 [state shown in FIG. 3c]. Next, the rotation of the motor 7 causes the sampling nozzle 2 to begin to descend. When the tip of the sampling nozzle 2 enters to a certain depth, it stops, and a suction/discharge pump (not shown) at the end of the Teflon tube 3 is activated to suck in the sample 21 (the state shown in FIG. 3d).

As described above, according to the present invention, by providing a breaking mechanism with a sharp tip, the parafilm can be easily broken, and small pieces of the parafilm do not get into the tip opening of the sampling nozzle or cover it. No more covering. This eliminates the need for analysis to be temporarily stopped midway through, making it possible to provide an analysis device that can quickly and accurately obtain analysis results.

The present invention is not limited to the above embodiments; for example, the springs 15 and 16 can be replaced with other elastic bodies such as rubber or resin; 5 and 18, pinions 6 and 19, etc., can be replaced with any other items as long as they operate in the same way.

[Brief explanation of drawings]

FIG. 1 is a configuration explanatory diagram showing one embodiment of the present invention;
FIG. 2 is a configuration explanatory diagram of the apparatus shown in FIG. 1 viewed from below, and FIG. 3 is an explanatory diagram showing the operation of the apparatus of the present invention. 1... Parafilm breaking mechanism covering the container opening, 2
...sampling, 21...sample, 23...parafilm.

Claims (1)

[Claims] 1.Equipped with a sharp tip that can be opened and closed in a direction perpendicular to the direction of insertion, which pierces the membrane material covering the opening of the container containing the sample to prevent moisture evaporation in the sample, and has a point inside for sucking the sample. a cylindrical membrane-breaking mechanism having a space in which a nozzle can be positioned; and a sample suction nozzle mechanism that moves within the membrane rupture mechanism and is driven and controlled so that the tip thereof is inserted into the sample through the tip of the membrane rupture mechanism that opens in the direction. Nozzle device.