JPH0245819Y2 - - Google Patents

Description

[Detailed description of the invention] This invention consists of a head to which a dispensing needle and an aspiration needle are attached, a base plate for setting a test tube below the head, and a relative distance between these heads and the base plate. a suction pipe and a collection tank that connect the suction needle to a vacuum pump; a cleaning liquid supply pipe and a cleaning liquid tank that connect the dispensing needle to a pressure pump; and a cleaning liquid supply pipe for cleaning the cleaning liquid supply pipe. The present invention relates to a cleaning device in a blood test device that includes a control valve that controls opening and closing of communication with a liquid tank.

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 washing solution (mainly physiological saline) is contained, and salt precipitation from the washing solution can cause crystals to form in the dispensing needle and cause clogging, and the weight of the washing solution in the liquid chamber can directly enter the pipe. There are problems such as smearing and sagging easily.

The present invention was devised in order to solve these problems in the conventional technology, and it can be done smoothly and
It is an object of the present invention to provide a cleaning device for a novel blood test device that allows proper cleaning work and 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 on which a dispensing needle and an aspiration needle are attached, a base plate on which a test tube is set below the head, and a base plate that connects these heads and a base plate. a lifting device that relatively changes the distance from the panel; a suction pipe and a recovery tank that connect the suction needle to a vacuum pump;
A washing device for a blood test apparatus comprising a washing liquid supply pipe and a washing liquid tank that connect the dispensing needle to a pressure pump, and a control valve that controls opening and closing of communication between the washing liquid supply pipe and the washing liquid tank. The dispensing needle and the suction needle attached to the head are formed in an inverted U shape so that they pass vertically through the liquid chamber in the head, and their upper ends open into the liquid chamber from the ceiling side. do.

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 pairs of dispensing needles 1 and suction needles 2 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 a distribution main passage 10a that is arranged at the rear end side (upper end side in FIG. 3) of the inner cavity of the head A and continues in the left and right direction.
and a large number of distribution branches 10b in the front and back direction (in the vertical direction in FIG. 3) arranged in a comb-like shape with their base ends dedicated to the distribution main channel 10a, forming a comb-like structure as a whole. As shown in FIG. 5, each dispensing needle 1 attached to the head A is connected to the opening upper end 1a from the ceiling of its distribution branch 10b. The head A is passed through the head A vertically so as to communicate with each other, and the upper end is formed into an inverted U shape. In addition, as shown in FIG. 3, inside the head A, there is a liquid collection trunk 20a that is arranged at the front end side of the head A lumen and continues in the left and right direction, and a liquid collection trunk 20a that is based on the liquid collection trunk 20a. The liquid collector 20 is made up of a large number of liquid collection branches 20b in the front and back direction, each of which has continuous ends and is arranged in a comb-like shape. The above-mentioned suction needles 2 are installed so as to be located within the intervals of the channels 10b..., and each of the above-mentioned suction needles 2... The head A is vertically passed through the opening so that the upper end 2a of the opening communicates therewith, and the upper end is formed into an inverted U-shape. And, the liquid collector 20 is its liquid collection trunk 20a.
A connecting pipe 20c connected to the head A is made to protrude from the top side of the head A, one end of the suction pipe 21 is connected thereto, and the other end of the suction pipe 21 is connected to the recovery tank as shown in FIG. 22, and a vacuum pump 24 is connected to the recovery tank 22 via a communication pipe 23, thereby making the recovery tank 22
The pressure can be reduced from the inside to the lumen of the suction needle 2.

Furthermore, the distributor 10 has a connecting pipe 10c connected to the main distribution path 10a of the distributor 10 protruding from the upper surface of the head A, and a cleaning liquid supply pipe 12 connected to the connecting pipe 10c.
One end is connected and communicated with the cleaning liquid supply pipe 12.
The other end is connected and communicated with a cleaning liquid tank 13, and a pressure pump 15 is connected and communicated with the cleaning liquid tank 13 via a pressurizing pipe 14, so that the air pressure in the cleaning liquid tank 13 is pressurized by the pump 15. The washing liquid is forced to be fed to each dispensing needle 1 through the distributor 10.

Reference numeral 5 denotes a bypass pipe branched from the middle part of the suction pipe 21, which has one end communicating with the suction needle 1 provided in the head A and the other end communicating with the recovery tank 22 connected to the vacuum pump 24. , is communicated with the intermediate portion of the above-mentioned cleaning liquid supply pipe 12 via a control valve 6 which can be freely controlled to open and close.

FIG. 6 shows how a suction needle 2 and a dispensing needle 1 attached to head A are connected to a distributor 10 which is a liquid chamber in head A.
Or, in the case where the liquid collector 20 is formed in an inverted U shape so that the upper ends 1a and 2a of the openings open from the ceiling side into the distributor 10 or the liquid collector 20, the inverted U-shaped portion clear vinyl pipe
This is an embodiment in which C ₁ or C ₂ is detachable. Vinyl pipes are not limited to being transparent; translucent or other types can be used as long as the liquid passing inside can be seen.

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

First, set the rack 3 supporting the test tubes a, a, etc. in parallel on the base plate 4, operate the lifting device 40 to adjust the distance between the rack 3 and the dispensing head A, and place a pair above each test tube a. The dispensing needle 1 and the suction needle 2, which are combined with each other, are in a state facing each other.

Subsequently, the vacuum pump 24 is kept in a constant operating state, and the control valve 6, which is a three-way valve, is connected to the cleaning solution tank side 12b of the cleaning solution supply pipe 12 by energizing while the pressurizing pump 15 is operated. When switching to a state in which communication is established with the distributor side 12a, the communication between the bypass pipe 5 and the cleaning liquid supply pipe 12 is cut off at the same time, so that the cleaning liquid in the cleaning liquid tank 13 is transferred to the distributor via the cleaning liquid supply pipe 12. 10.

In the distributor 10, as the liquid level of the supplied cleaning liquid rises, as shown in FIG. Then, the cleaning liquid similarly rises from the opening upper end 1a of the ceiling part 10d, goes around the inverted U-shaped part 1b, and descends, and then flows from each dispensing needle 1 to each test tube a. ...is dispensed inside. 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 to the control valve 6 is cut off, the bypass pipe 5 is connected to the distributor side 12a of the cleaning liquid supply pipe 12, and the bypass pipe 5 is connected to the distributor side 12a of the cleaning liquid supply pipe 12.
When the communication between the distributor side 12a and the cleaning liquid tank side 12b is switched to a state where the communication is cut off, the supply (pressure feeding) of the cleaning liquid from the cleaning liquid tank 13 is stopped, and at the same time, the distributor 10 is connected to the bypass pipe. 5, the cleaning liquid filled in the distributor 10 and the dispensing needles 1 connected thereto will drain into the collection tank 22. The interior of the distributor 10 and the dispensing needle 1 becomes a chamber, and the outside air is subsequently sucked in.

Next, from this state, the head A is lowered so that the tips of the suction needles 2 enter into the test tubes a. As a result, the suction needles 2 suck the washing liquid in the test tube a, and feed it into the liquid collector 20 from the inverted U-shaped portion 1b on the upper end side, as shown in FIG. The waste liquid accumulated in the liquid collector 20 is collected into a collection tank 22 via a suction pipe 21.
At this time, outside air continues to be sucked in from the dispensing needle 1 and flows into the suction pipe 21.
There is no problem in suctioning the cleaning liquid with the suction needle 2.

As explained above, the cleaning device for the blood test apparatus according to the present invention has the dispensing needle and the suction needle attached to the head vertically penetrate the liquid chamber in the head, so that the upper ends of each are connected to the liquid chamber from the ceiling side. Since it is formed in an inverted U-shape so that it opens at Therefore, the air in the liquid chamber will not mix with the cleaning liquid, and therefore,
Liquid beads are less likely to form on the dispensing needle tip, and dispensing errors are small as long as the head is horizontal. After dispensing, when the suction operation begins, the liquid in the suction needle (pipe) is sucked in first, then the liquid in the plate or test tube is sucked in, and when that liquid runs out, air is sucked in, leaving the pipe empty. As a result, when the operation is stopped, the needle (pipe) can always be kept free of liquid, preventing crystals from forming at the tip of the pipe due to salt precipitation from the washing solution (physiological saline), and clogging. It doesn't cause it.

In addition, the cleaning device of the blood test device of the present invention has an inverted U-shaped portion of the dispensing needle and suction needle attached to the head that penetrates the head up and down and protrudes upward, into a removable transparent or If a translucent vinyl pipe is used, if the dispensing needle or suction needle becomes clogged with foreign matter, the vinyl pipe can be removed and the foreign matter can be easily removed with a wire, etc., and the liquid will not flow during work. It is easy to maintain as it can be monitored.

[Brief explanation of the drawing]

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...Dispensing needle, 1a...Opening upper end, 1b...vinyl pipe, 10...Distributor, 10a...Distribution main path, 10
b...Distribution branch, 10c...Connection pipe, 10d...
Ceiling section, 12...Washing liquid supply pipe, 12a...
Distributor side, 12b...Washing liquid tank side, 13...
Washing liquid tank, 14... Pressurizing pipe, 15...
Pressurizing pump, 2... suction needle, 2a... upper end of opening, 2b... vinyl pipe, 20... liquid collector,
20a...Liquid collection trunk path, 20b...Liquid collection branch path, 20
c... Connection pipe, 21... Suction pipe, 22... Recovery tank, 23... Communication pipe, 24... Vacuum pump, 3... Suitability plate (rack), a... Test tube, 4... Unit Panel, 40...lifting device, 5...bypass pipe, 6...control valve, _C1 , _C2 ...vinyl pipe.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A head on which a dispensing needle and an aspiration needle are attached, a base plate on which a test tube is set below the head, and a relative distance between these heads and the base plate. a suction pipe and a collection tank that connect the suction needle to a vacuum pump; a cleaning liquid supply pipe and a cleaning liquid tank that connect the dispensing needle to a pressure pump; and a cleaning liquid supply pipe for cleaning the cleaning liquid supply pipe. In a cleaning device for a blood test device that includes a control valve that controls opening and closing of communication with a liquid tank,
The dispensing needle and the suction needle attached to the head are formed in an inverted U shape so that they penetrate the liquid chamber in the head up and down, and each upper end opens into the liquid chamber from the ceiling side. A cleaning device for blood test equipment. (2) The inverted U-shaped parts of the dispensing needle and suction needle attached to the head that pass through the head vertically and project upward are made of removable transparent or translucent vinyl pipes. A cleaning device for a blood test device according to claim 1, characterized in that it is a utility model.