JPH0245820Y2 - - Google Patents

Description

[Detailed description of the device] This device is used to optically inspect reaction spheres (beads) reacted with the patient's blood as a specimen in medical blood tests of patients. The present invention relates to improvements in a washing device in a blood test device that is used to wash a test tube containing a reaction bulb in order to remove a sample.

In the conventional cleaning device of this type of blood test device, the dispensing needle and suction needle are installed in the floor of the liquid chamber of the head so that they open, so even when the operation is stopped, the dispensing needle (pipe) is A cleaning solution (mainly physiological saline) is contained, and salt precipitation from the cleaning solution can cause crystals to form in the dispensing needle and cause clogging, and the weight of the cleaning solution in the fluid chamber can directly enter the pipe. There are also problems such as the liquid chamber inside the head is composed of a distributor that communicates with the dispensing needle and a liquid collector that communicates with the suction needle, so the structure is complicated. .

The present invention was devised to solve these problems in the prior art, and has a simple structure that allows for smooth and proper cleaning work.
Moreover, it is an object of the present invention to provide a cleaning device for a new blood test device that is easy to maintain.

In order to achieve this purpose, the cleaning device for the blood test device of the present invention includes a head having one liquid chamber, a head that passes through the liquid chamber vertically, and each upper end of which opens into the liquid chamber from the ceiling side. A plurality of needles are formed in an inverted U shape and are attached to the head for both dispensing and aspiration, a base plate for setting test tubes or titration plates below the head, and these heads. A lifting device that relatively changes the distance from the base plate, a single conduit that communicates with the liquid chamber and serves as both supply and recovery of the cleaning liquid, and a suction pipe that branches off from the conduit and connects to the vacuum pump, and a recovery pipe. Consisting of a tank, a cleaning liquid supply pipe that branches from the conduit and connects to the pressurizing pump, a cleaning liquid tank, and a control valve provided at the branch point between the conduit, the suction pipe, and the cleaning liquid supply pipe. It is characterized by

Hereinafter, the present invention will be described in detail with reference to illustrative embodiments.

In FIG. 2, A is a head, on which a plurality of needles 1, which serve both for dispensing and suctioning, are assembled at predetermined intervals.

Below the head A are a large number of test tubes a, a...
Alternatively, a base plate 4 on which a titration plate with a large number of holes is set is mounted so as to be movable up and down via a lifting device 40. The elevating device 40 is used to relatively change the distance between the head A and the base plate 4, and may be used to raise and lower the head A.

Inside the head A, as shown in FIG. 3, there is one liquid chamber 2, into which a plurality of needles 1, which serve both for dispensing and suctioning, penetrate at predetermined intervals. As shown in FIG. 5, each of these needles 1 protrudes upward and is folded back in an inverted U shape to open into the liquid chamber 2 from the ceiling side. 1b is an inverted U-shaped portion.

A conduit 5 is drawn out from the liquid chamber 2, and the conduit 5 branches into a suction pipe 51 and a cleaning liquid supply pipe 52. On the other hand, the liquid chamber 2 of the conduit 5
When the side opening end is flush with the inner wall surface of the ceiling part 2a (if the pressure is strong during suction, suction of air inside the liquid chamber 2 is not a problem), (It is desirable to form a depression 2c in the corresponding part inside the floor part 2b), as shown in the imaginary line in FIG.
Any of these can be adopted, such as when communicating with the recessed part 2c from below the floor part 2b. Reference numeral 6 denotes a three-way valve (control valve) provided at the branch portion, 7 a cleaning liquid tank with which the cleaning liquid supply pipe 52 communicates, 8 a pressure pump communicating with the cleaning liquid tank 7, and 9 a suction pipe 51. 10 is a vacuum pump that communicates with the recovery tank 9.

FIG. 6 shows a plurality of needles 1 attached to head A, which serve as both dispensing and suction, respectively, and liquid chambers 2 in the head A.
When forming an inverted U-shape so that each upper end opening 1a faces the liquid chamber 2 from the ceiling side, the inverted U-shaped part is made detachable with a transparent vinyl pipe b. This is an example. The vinyl pipe b is not limited to being transparent, but may also be translucent if it is possible to see the liquid passing through it. 1c is an elastic tube that fits into the part of the needle 1 that protrudes downward from the head A, and its lower end is about 0.5 mm longer than the lower end of the needle 1 so as not to damage the bottom of the adjustment plate, etc. It's summery.

Next, the main functions of the cleaning device configured as described above will be explained.

First, the rack 3 supporting the test tubes a, a, etc. in parallel is set on the base plate 4, and the lifting device 40 is activated to properly adjust the distance from the head A, and each needle 1 is placed above each test tube a. The situation is such that each of them is present.

Next, the vacuum pump 10 is kept in constant operation, and the three-way valve 6 is energized to close the cleaning liquid supply pipe 5 while the pressurizing pump 8 is operated.
2 and the conduit 5 communicate with each other, the cleaning liquid in the cleaning liquid tank 7 is transferred to the cleaning liquid supply pipe 52.
and is supplied to the liquid chamber 2 via the conduit 5.

In the liquid chamber 2, as the liquid level of the supplied cleaning liquid rises, as shown in FIG. Then, the cleaning liquid similarly rises from the upper end opening 1a of the ceiling part 2a, goes around the inverted U-shaped part 1b and descends, and enters each test tube a from each needle 1. It is dispensed. The amount dispensed at this time is set as desired by controlling the time during which the current is applied.

Next, from this state, the power supply to the three-way valve 6 is cut off, and the communication with the cleaning liquid supply pipe 52 is cut off.
When the suction pipe 51 and the conduit 5 are switched to communicate with each other, the supply (pressure feeding) of the cleaning liquid from the cleaning liquid tank 7 is stopped, and at the same time, the liquid chamber 2 is communicated with the vacuum pump 10 via the conduit 5. Since it is connected and communicated with the suction pipe 51, the cleaning liquid filled in the liquid chamber 2 and each needle 1 connected thereto is collected in the recovery tank 9, and is transferred to the liquid chamber 2 and each needle. 1...The inside becomes empty and the outside air continues to be sucked in.

In this case, head A is lowered slightly to adjust the tips of needles 1 to appropriate positions for suctioning the washing liquid in test tubes a. Then, as shown in Figure 5,
The drained liquid after washing is returned to the liquid chamber 2 through the inverted U-shaped portion 1b from the lower end to the upper end of each needle 1..., and the drained liquid accumulated in the liquid chamber 2 is collected by the suction pipe 51.
It is collected into the collection tank 9 via.

As described above, the cleaning device in the blood test device of the present invention includes a head having one liquid chamber,
A plurality of needles are formed in an inverted U-shape so as to penetrate the liquid chamber vertically and open into the liquid chamber from the ceiling side, and are attached to the head and serve for both dispensing and suction. , a platform for setting test tubes or titration plates below the head, an elevating device for relatively changing the distance between the head and the platform, and a system that also serves to supply and collect the washing liquid that communicates with the liquid chamber. A single conduit, a suction pipe and a recovery tank that branch from the conduit and connect to the vacuum pump, a cleaning liquid supply pipe and a cleaning liquid tank that branch from the conduit and connect to the pressure pump, and the conduit. It consists of a control valve installed at the branch of the suction pipe and the cleaning liquid supply pipe, so when dispensing, the air in the liquid chamber first comes out through the pipe (needle that serves both dispensing and suction). Dispensing starts when the liquid level touches the ceiling, so the air in the liquid chamber does not mix with the cleaning liquid, and therefore it is difficult to form a droplet on the tip of the dispensing needle, and dispensing continues as long as the head is horizontal. There are few errors in notes. and,
After dispensing, when the suction operation begins, the liquid (washing liquid) in the liquid chamber is first sucked in, and then the liquid (washing liquid) enters the pipe (needle that serves both for dispensing and suction). The liquid in the test tube (or plate) is then sucked in through the pipe and the liquid chamber, and when these liquids are exhausted, air is sucked in and the pipe becomes empty. This ensures that there is no liquid in the pipe when the operation is stopped, and prevents crystals from forming at the tip of the pipe due to salt precipitation from the cleaning solution (physiological saline), which can cause blockages. It is prevented from becoming. Further, since the dispensing and suction operations are performed through the same needle and the same liquid chamber, the device structure is simplified and manufacturing costs can be reduced.

In addition, the cleaning device of the blood test device of the present invention has an inverted U-shaped portion of each of the plurality of needles attached to the head, which serves both dispensing and suction, passing through the head vertically and protruding upward. , since it is removable,
If the needle becomes clogged with foreign matter, this inverted U-shaped part can be removed and the foreign matter can be easily removed using a wire or the like. It can be easily set up without distinguishing between injection and suction use, making maintenance easier.

[Brief explanation of drawings]

Fig. 1 is a perspective view of the rack and test tube, Fig. 2 is a partially cutaway side view of the apparatus according to the present invention, and Fig. 3 is a perspective view of the rack and test tube.
The figure is a cross-sectional plan view of the head of the above device, FIG. 4 is an explanatory diagram of the same device, FIG. 5 is a sectional view taken along the line of FIG. It is a front view. Explanation of drawing symbols: A...Head, 1...Hand, 1
a...Top opening, 1b...Inverted U-shaped part, 1c
... Elastic tube, 2 ... Liquid chamber, 2a ... Ceiling part, 2b ... Floor part, 2c ... Recessed part, 3 ... Titration plate (rack), 4 ... Base plate, 40 ... Lifting device, 5... Conduit, 51... Suction pipe, 52...
Washing liquid supply pipe, 6... Three-way valve, 7... Washing liquid tank, 8... Pressure pump, 9... Recovery tank,
10... Vacuum pump, a... Test tube, b... Vinyl pipe.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A head having one liquid chamber, formed in an inverted U shape so that the liquid chamber passes through the liquid chamber vertically, and each upper end opens into the liquid chamber from the ceiling side. At the very least, the distances between the multiple needles that are attached to the head that serve both for dispensing and suction, the base plate that sets the test tube or titration plate below the head, and the base plate must be determined relative to each other. a single conduit that communicates with the liquid chamber and serves both to supply and recover the cleaning liquid; a suction pipe and a recovery tank that branch from the conduit and connect to the vacuum pump; A blood test device comprising: a washing liquid supply pipe and a washing liquid tank connected to a pressure pump; and a control valve provided at a branch point between the conduit, the suction pipe, and the washing liquid supply pipe. washing equipment. (2) The inverted U-shaped portion of each of the plurality of needles attached to the head, which serves both for dispensing and suction, passing through the head vertically and protruding upward is detachable. A cleaning device for a blood test device according to claim 1 of the utility model registration claim.