JPH07122215B2 - Automatic liquid preparation device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an automatic liquid preparation device for dyeing liquid, developing liquid, etching liquid and the like.

[Prior Art and Problems Thereof] The present invention relates to an improvement of the automatic liquid preparation device (see Japanese Patent Laid-Open No. 59-157640) previously provided by the present inventor.
The automatic harmonic device disclosed in JP-A-59-157640 is
The piston of the dispenser that sucks in and discharges the liquid to be prepared and the drive arm that drives the piston are magnetically coupled by an electromagnetic suction device. The drive arms are supported by guide rails provided on the left and right, and the left and right guide rails are provided with detectors for detecting the movement amounts of the drive arms, respectively. Also, the amount of liquid required for liquid preparation is measured by the amount of movement of the drive arm when the dispenser sucks the liquid, and the dispenser prepares the liquid sucked into the dispenser when preparing the liquid. All of them are discharged.

However, the conventional automatic liquid adjusting device described above has a problem that the amount of liquid for liquid adjustment discharged from the dispenser is inaccurate due to the following reasons (a) to (c).

(A) Since the amount of liquid poured into the receiver is detected from the amount of movement of the piston, that is, the amount of movement of the drive arm when absorbing liquid into the dispenser, the dispenser sucked bubbles during liquid absorption. In this case, the amount of liquid absorbed changes significantly.

(B) To stop the liquid absorption of the dispenser, remove the electromagnetic adsorber that connects the drive arm and the piston of the dispenser,
Although the drive arm and the piston are in a non-coupled state, the piston and the piston drive arm are not immediately separated due to the residual magnetism of the electromagnetic adsorption device, and an error occurs in the amount of liquid sucked into the dispenser. .

(C) The temperature of the piston of the dispenser rises due to the heat generated by the electromagnetic adsorber, and the volume of the dispenser changes, causing an error in the liquid absorption amount.

Further, the conventional automatic liquid preparation device has a problem that the electromagnetic adsorber connecting the piston of the dispenser and the drive arm is unintentionally de-energized.

Further, in the conventional automatic liquid adjusting device, the drive arm moves along the two left and right guide rail portions that support the drive arm, but the drive arm does not move in a state of being perpendicular to the left and right guide rails during movement. Since it causes variations in the piston movement amount, in order to detect the average value of the piston movement amount, it is necessary to equip the left and right guide rails with detectors that detect the movement amount of the drive arm. There is a problem in that the amount of movement is inaccurate and the cost is also disadvantageous.

The present invention has been made in order to solve the above-mentioned problems, the accuracy of the amount of liquid to be prepared is high, the piston of the dispenser and the drive arm do not inadvertently separate, and It is an object of the present invention to provide an automatic liquid adjusting device which is free from variations and whose cost is reduced.

[Means for Solving the Problems] The present invention relates to a plurality of dispensers that absorb liquid into a cylinder by a movement of a piston or pour liquid out of the cylinder, and a plurality of dispensers of each dispenser when sucking the liquid. Piston withdrawing means for simultaneously moving the piston to a predetermined position in the suction direction, and after sucking the liquid, the pistons of the respective dispensers are simultaneously moved to the predetermined position in the dispensing direction so that the liquid in each dispenser is predetermined. Initial pouring means for pouring into the container, pushing back means for pushing the piston back to the position for pouring the amount of liquid set for each dispenser when pouring liquid, and cylinder for pouring liquid And a pouring means for pouring out the residual liquid in the container into a predetermined container.

With the above configuration, the withdrawing means causes the plurality of dispensers to simultaneously inhale the liquid, and the initial dispensing means, the pushing back means, and the dispensing means cause the dispenser to dispense the sucked liquid. Therefore, the liquid can be automatically prepared.

Further, the present invention provides a three-way solenoid valve provided in a plurality of stock solution tanks for storing the stock solution to be prepared, a receiver for containing the preparation solution, and each liquid supply pipe for feeding the stock solution in each stock solution tank to the receiver. A dispenser whose connection is switched to the stock solution tank side or the receiver side via the dispenser, and a dispensing drive device capable of simultaneously advancing or retracting the piston of each dispenser via a drive arm directly connected to the piston. , A movement amount detector that detects the movement amount of the drive arm, a detector that detects the backward limit position of the drive arm, a signal that reverses the rotation direction of the drive motor of the dispensing drive device, and each dispenser The liquid suction means that outputs a signal to switch all three-way solenoid valves to the stock solution tank side and the pistons of all the dispensers are moved until a predetermined amount is reached, and when the predetermined amount is reached, the dispensing is performed. Stop the rotation of the drive motor of the drive Output signal and a signal for switching all three-way solenoid valves for each dispenser to the receiver side, and a calculating means for calculating the amount of the stock solution dispensed by each dispenser to the receiver side Then, the pistons of all the dispensers are moved until the amount of the undiluted solution to be dispensed from each dispenser calculated by the computing means reaches the target dispense amount set for the dispenser. When the amount is reached, a dispensing stop means for outputting a signal for stopping the rotation of the drive motor of the dispensing drive device and a signal for switching the three-way solenoid valve connected to the dispenser to the stock solution tank side, and the suction means. A liquid means, a pouring preparation means, and a control means for controlling the operation of the pouring stop means.

With the above configuration, the liquid absorbing means switches all the three-way solenoid valves connected to each dispenser to the stock solution tank side, reverses the rotation of the drive motor, and retracts the drive arm to the position of the detector. As a result, the stock solution is sucked into the dispenser. The pouring preparation means advances the piston of the dispenser only by the set predetermined amount, and discharges the bubbles mixed with the stock solution in the dispenser to the stock solution tank side. The dispensing stop means moves the pistons of all dispensers to reach the target dispense volume until the amount of undiluted solution dispensed by each dispenser reaches the target dispense volume set for each dispenser. At this time, the rotation of the drive motor of the dispensing drive device is stopped, and the three-way solenoid valve connected to the dispenser is switched to the stock solution tank side.

Further, according to the present invention, a substantially U-shaped case having an upper support base and a lower support base formed with a predetermined space below the upper support base, and a plurality of dispensers provided on the upper support base. A vessel, provided on the lower support table, and a container table on which a capacity for receiving the liquid injected from the dispenser is placed,
It is characterized in that it is provided with an operation panel provided at the tip of the lower support.

By configuring as described above, the dispenser, the container for receiving the liquid to be injected, and the operation panel for setting the amount of liquid to be injected are integrally formed, and the liquid poured out from the pipette is injected into the container. It

[Embodiment] FIG. 1 and FIG. 2 show an embodiment of the automatic liquid preparation device of the present invention, and show the mechanical portion of the automatic liquid preparation device. 1-
1, 1-2 , ... A plurality of dispensers fixed to an appropriate frame (not shown), the liquid inlet / outlet A of which is an injection pipe 2-1,2-
It is connected to 2, ... through three-way solenoid valves 3-1, 3-2, .... Dispensing unit 1-1, 1-2, ... the cylinder 1 -1a, 1 -
2a, ... and the cylinder 1 -1a, 1 -2a, piston 1 -1b reciprocating in ......, 1-2b, are composed of a ...,
Piston 1 -1b, 1 -2b, stock tank 4 by the retreat of the ......
-1,4-2, ... through the inlet / outlet A of the stock solution inside the cylinder
1 -1a, 1 -2a, suction in ......, the piston 1 -1b, 1 -2
b, the cylinder 1 -1a Advancement of ......, 1 -2a, a stock solution of the ...... implanting NOTE out receiver 5 through the note inlet and outlet A. 1 -1c, 1 -2c, ...... the piston 1 -1b, 1 -2b, ......
1 in the bracket fixed to the back of the -1c, 1 -2c, in ...... a coupling 6-1, 6-2, ...... is attached.

Three-way solenoid valves 3-1, 3-2, ... are stock solution tanks 4-1, 4-
Normally open port NO connected to the liquid supply pipes 15-1, 15-2, ... to 2, and common port C connected to the dispensers 1-1, 1-2 ,.
It has an OM and a normally closed port NC connected to the injection pipes 2-1, 2-2, ... To the receiver 5, and the receiver 5 is energized (on).
Injection tube 2-1 and 2-2 into, ... and dispenser 1 -1, 1 -2, ...
Are connected (COM-NC), and when not energized (OFF), liquid supply pipes 15-1, 15-2, ... to stock solution tanks 4-1, 4-2, ... and dispenser 1 -1, 1-2 , ... And conduction is made (COM-NC).

6-1, 6-2, ..., the piston 1 -1b of the dispenser, 1-2b, ...
... and a drive arm 7 which will be described later are directly connected to each other by a coupling having a degree of freedom as will be described later. As shown in FIG. 9, a coupling 50 provided on the piston side of the dispenser and a drive arm side And a joint 51 provided. Thus dispenser piston 1 -1b, 1-2b, ...... is for forward and backward in accordance with forward and backward movement of the drive arm 7.

Further, dispenser 1 -1, 1 -2, ..., the second dispenser 1 -1 as shown in FIG, 1 -2, ... of the cylinder 1 -1a, 1 -2a, ... of the entrance portion a of the stock solution protrude and out tube 55-1 ...... circumferentially connected at the bottom to upwards, and the dispenser 1
-1, 1-2 , ... The main body is installed with a slight inclination from the horizontal so that the entrance A side is at a high position. Dispenser like this
1 -1, 1 -2, by providing the ......, dispenser 1 during liquid absorption -
The air bubbles mixed in 1, 1-2 , ..
Can be collected in.

As shown in FIGS. 10 and 11, fittings 50, dispenser fittings 1 -1c fixed to the rear surface of the piston, U-shaped at the distal end of a rod 50a fixed to the 1 -2c ...... Two arms 50 provided with two forked parts 50b and arranged in parallel with appropriate intervals
Pins 50e penetrating the arms 50c and 50d are fixed to c and 50d. The joint 50, the through rod 50a so that the pin 50e is horizontal state fitting 1 -1c, 1 -2c ......
Fixed to.

On the other hand, the joint 51 is formed by forming a connecting plate 51b thinner than the gap formed by the two arms 50c and 50d of the joint 50 at the tip of the rod 50a fixed to the drive arm 7.
The connecting plate 51b has an oval notch 51c in a direction perpendicular to the central axis of the rod 51a at a position where the 1b can perform a pendulum motion between the two arms 50c and 50d of the joint 50 about the pin 50e. It is provided. The notch 51c is slidable with the pin 50e, and the joint 50 and the joint 51 are such that the notch 51c of the joint 51 is engaged with the pin 50e of the joint 50 as shown in FIGS. 10 and 11. The joint 50 and the joint 51 are connected with each other. Also, Fig. 10 shows joint 50
FIG. 11 is a diagram showing a state where the joint 51 and the joint 51 are connected, as seen from the direction of the arrow B shown in FIG. 9, but as shown in FIG.
51b is slidable in the horizontal direction indicated by arrow C between the two arms 50c and 50d of the joint 50.
51 has mutual freedom in the horizontal direction. In addition,
As shown in FIG. 11, the pin 50e of the joint 50 can slide the notch 51c of the joint 51 in the vertical direction indicated by the arrow D in FIG. They also have a degree of freedom with each other.

As described above, since each dispenser is provided with a slight inclination with respect to the horizontal direction, the rod 50a of the joint 50 inclines from the horizontal direction at the same angle as the dispenser. On the other hand since the joint 51 connected to the drive arm 7 is moved in the horizontal direction, with the movement of the piston 1 -1b dispensers 1 -1, pin 50e of the joint 50, the notch 51c of the joint 51 first It moves in the direction of arrow D shown in the figure.

Reference numeral 8 denotes a dispensing drive device, which includes a reversible drive motor 8a and a transmission mechanism 8b for moving the drive rod 9 forward or backward in accordance with the rotation direction of the drive motor. In addition, the drive motor 8a includes a moving amount of the drive rod 9 that moves forward and backward and the drive rod 9
A rotary encoder 14 is provided for detecting the position of. The rotary encoder 9 is composed of a photoelectric element and a slit, and outputs a pulsed signal.

Further, a detection plate 16 is installed on the drive rod 9, and the detection plate 16
A limit switch 17 is installed at an appropriate position where it contacts with. Detection plate 16, dispenser 1 -1, 1 -2, ... of the piston 1 -1b, 1-2b, ... are cylinders 1 -1a, 1 -2a, ...
The limit switch 17 comes into contact with the limit switch 17 when it moves backward together with the drive rod 9 to an appropriate position within the range not deviated from the inside, and the limit switch 17 causes the detection plate 16 to come into contact with the limit switch 17 to move the drive rod 9 backward. It outputs a signal to stop the rotation of 8a.

The drive arm 7 has pistons 1-1b, 1-2b, 1-2b, 1-2b, 1-2b of the dispenser 1 at both ends 10, 10 'via ball slides (not shown).
Fixed guide rail 1 extending parallel to the moving direction of ……
A rod 12 which is movably supported on 1, 11 'is connected to a drive rod 9 through a coupling 13 so that the drive arm 7 moves forward or backward together with the drive rod 9. .

18-1, 18-2, ... Are injection nozzles attached to the tips of the injection tubes 2-1, 2-2 ,. .

Further, the stock solution tanks 4-1, 4-2, ... May be provided with a stirring blade 52 so as to stir the stock solution stored therein, as shown in FIG.

In the automatic liquid preparation device configured as described above, the first and second
The operation of this embodiment will be described with reference to FIG. 3 showing the control device 30 in addition to the drawings.

The relationship between the number of pulses Pi generated by the rotary encoder 14 according to the movement of the drive rod 9 and the amount of undiluted solution of each dispenser is found by carrying out, and the number of pulses per unit undiluted solution of each dispenser Poi first (pulse / ml) as the first control table control unit 30
It is registered in the storage device 31 by using the numerical keys 21a.

Further, dispenser 1 -1 to the stroke of 1 -n piston, i.e. sets the generation number of pulses Pm corresponding to the maximum possible distance moved from the end of the dispenser to the end, the third storage control device 30 Register with device 34.

Furthermore, the individual dispenser 1 -1, 1 -2, every ..., dispenser 1
-1 to 1-n liquid inlet / outlet A to three-way solenoid valve 3-
The inner volume of the inlet / outlet pipes 55-1, 55-2, ... 1 to 3-n, the residual inner volume of the three-way solenoid valve 3-1 to 3-n, and the three-way solenoid valve 3-1 to 3-1 3-n to stock solution tank 4
Dispensing with the largest value of the sum of the internal volume of the liquid supply pipes 15-1, 15-2, ... The controller controls the number of pulses Pn output by the rotary encoder 14 corresponding to the amount of movement of the piston required to discharge the internal volume of the above value, to the control device 30.
It is registered in the fourth storage device 35 of. The pulse number Pn may be obtained by an experiment. The pulse number Pn registered in the fourth storage device 35 is output to the first comparing device 37 which compares the pulse number Pn with a count value Pi output from the adding device 42 described later.

When the stock solution name and the target injection amount Qi of each stock solution are input, the control device 30 sets the pulse number Poi per unit pour stock solution amount of the dispenser connected to the stock solution tank containing the stock solution to the first storage device 31. And the pulse number PQi for the target injection amount Qi is calculated by the first arithmetic unit 32 (PQi = Poi × Qi).

Further, the first arithmetic unit 32 uses the calculated target pulse number PQi.
Is divided by the number of generated pulses Pm corresponding to the maximum movable distance of the piston described above, the value of "quotient" is the number of times of dispensing n, and the value of "remainder" is the number of pulses of final dispensing Pqi. As shown in the table, it is registered in the second storage device 33. Incidentally, the value of the number of times of dispensing n is 0, 1, 2, ..., It means that the number of times of dispensing is the first time when n = 0. Therefore, the number n
When the value of is 0, the target pulse number PQi and the final dispensing pulse Pqi are equal. Further, of the calculated number of times of dispensing n, the largest value is registered in the number-of-times storage device 43, and the piston of the dispenser reciprocates the number of times of that value.

In addition, Table 2 shows that each stock solution A ₃ was not poured.

The movement distances of the dispensers set at the same time are assumed to be almost the same. In addition, it does not matter that the caliber is different.

When the operation start signal is input, the drive motor 8a of the dispensing drive device 8 operates (for example, rotates left) so that the drive rod 9 moves in the backward direction. At this time, the three-way solenoid valves 3-1, 3-2, ... Are not energized, and the valve open circuit is open in the stock solution tanks 4-1, 4-2 ,.

Therefore, the piston 1 -1b each dispenser, 1-2b, ...... retreats according retraction of the drive rod 9, the stock solution tank 4-1,4-
2, a stock solution of the ...... cylinder 1 -1a of each dispenser, 1 -2a, ...
… Inhale inside.

The drive motor 8a retracts the drive rod 9 until the detection plate 16 provided on the drive rod 9 contacts the limit switch 17. Then, the limit switch 17 outputs a backward movement completion signal to the arithmetic and control unit 36 of the control unit 30 so that the arithmetic and control unit
36 stops the rotation of the drive motor 8a via the drive motor control device 40, and drives the drive rod 9 in the addition device 42.
The movement count value Pi of is set to zero. The arithmetic and control unit 36 also outputs a signal to the number-of-times storage unit 43, which sets the number of pouring out to zero.

Next, the control device 30 causes the drive motor 8a to rotate in the reverse direction (for example, rotate to the right) to move the drive rod 9 forward. The pulse signals output from the rotary encoder 14 are added and integrated by the adder 42. In this case, all three-way solenoid valves 3
Since -1,3-2, ... remain de-energized, they are opened in the direction of the valve stock solution tanks 4-1, 4-2, .... The count value Pi that has been added and integrated is transferred to the first comparison device via the sequential operation control device 36.
The first comparator 37 compares the pulse number Pn output from the fourth storage device 35 with the count value Pi to output the pulse number.
When Pn becomes equal to the count value Pi, a signal for stopping the rotation of the drive motor 8a is output to the drive motor control device 40. Therefore, the rotation of the drive motor 8a is temporarily stopped. Further, the addition value of the addition device 42 is set to zero via the arithmetic and control unit 36. Purpose of thus temporarily advance the drive rod 9, dispenser 1 -1 during liquid absorption, 1 -2, air bubbles mixed ...... is inclined dispenser 1 -1, 1 -2, the Since all the bubbles are gathered at the liquid inlet / outlet part A, all of these bubbles are stored in the stock solution tanks 4-1 and 4-.
2, back to ..., each of the dispensers 1 -1, 1 -2, ... three-way port solenoid valve 3-1 and 3-2, the state does not contain remarkably bubbles between ...... This is because

Next, the second comparison device 39 is generated by the signal output from the arithmetic and control unit 36.
Is dispenser 1 -1 stock solution, based on the input data to the second storage device 33 needs to be dispense into the receiver 5, 1 -2, three-way port solenoid valve corresponding to the ...... 3-1 3-2, the ...... was energized state, dispenser 1 -1, 1 -2 to the ...... and receiver 5 in a conductive state. Thus dispenser 1 -1, 1 -2, ... of the piston 1 -1b,
1-2b, if ...... is forward, dispenser 1 -1, 1 -2, suspension in ...... will be dispense into receiver 5.

Next, the arithmetic and control unit 36 operates the drive motor 8a again in the direction in which the drive arm 7 moves forward. Therefore, the undiluted solution is dispensed from the corresponding dispenser to the receiver 5, the rotary encoder 14 outputs a pulse signal to the adding device 42, and the adding device 42 integrates the number of pulses and successively calculates the integrated value. Output to the control device 36. The second comparison device 39 compares the target pulse number of the dispenser with the pulse number output by the adding device 42, and the value PQi having the smallest target pulse number matches the pulse number output by the adding device 42. At that time, a signal for temporarily stopping the rotation of the drive motor 8a is output to the drive motor control device 40. Further, the second comparison device 39 brings the three-way solenoid valve 3-i of the dispenser 1- i corresponding to the target pulse number PQi to the non-energized state via the three-way solenoid valve control device 38. Therefore, the stock solution in the dispenser 1-i is no longer poured to the receiver 5 side, and thereafter, the stock solution in the dispenser 1 -i is poured to the stock solution tank 4-i side.

Next, the arithmetic and control unit 36 again operates the drive motor 8a in the forward direction, and the second comparing unit 39, as described above, causes the second comparing unit 39 to output the target pulse number PQi 'which is the next smaller value and the pulse number output by the adding unit 42. Are compared with each other, and when they coincide with each other, the rotation of the drive motor 8a is temporarily stopped again to bring the corresponding three-way solenoid valve 3-i 'into a non-conductive state.

In this way, the second comparison device 39 uses the three-way solenoid valves 3 -1, 3 -2, ... for the dispenser that has reached the target number of pulses set in the second storage device 33 for the dispenser. The open circuit of the above is sequentially switched to complete the pouring of the stock solution into the receiver 5.

The third comparison device 41 calculates the number of pulses output by the addition device 42,
The pulse number Pm at the maximum movement of the dispenser piston set in the third storage device 34 is compared, and when these pulse numbers match, the rotation of the drive motor 8a related to the forward movement of the drive arm 7 is stopped. All three-way solenoid valves 3-1
3-2, ... 3-n are made non-conducting state, and the valve open circuit is switched to the stock solution tanks 4-1, 4-2 ,. Further, at this time, the number of pourings stored in the number-of-times storing device 43 is replaced with a value obtained by subtracting one from the currently stored number of pourings.

When the number of times dispense count storage unit 43 outputs non-zero, the arithmetic and control unit 36, a driving motor 8a is operated until the limit switch 17 is turned on, the dispensing device 1 -1,
1 -2, ... of the piston 1 -1b, 1-2b, ... and linked to that drive arm 7 all dispenser 1 -1 is retracted and 1 -2,
…… Allow 1-n to inhale the stock solution. Then, as described above, the limit switch 17 is turned on, so that the arithmetic and control unit 36 causes the movement rod count value of the drive rod 9 in the adder 42 to be counted.
Set Pi to zero. And like the operation described above,
The first comparator 37, the count value Pi is to advance the drive rod 9 to match the number of pulses Pn stored in the fourth storage device 35, the entire dispensing device 1 -1, 1 -2, ... 1 -Remove air bubbles in n. At this time, the three-way solenoid valves 3-1, 3-2, ...
Is because it is not energized, the dispenser 1 -1, 1 -2, suspension in the ... are stock tanks 41 and 42, returned to .... Then, as in the above-described operation, at the time when the bubble removal is completed, the second comparison device 39 turns on the three-way solenoid valve corresponding to the dispenser having the dispensing number n of 1 or more to the receiver 5 side. Make the undiluted solution available. Then, the second comparison device 39 drives the drive motor until the pulse number output by the addition device 42 reaches the smallest pulse number of the pulse numbers corresponding to the remaining injection amount.
8a is operated and the drive rod 12 is moved forward. Then, when the minimum number of pulses is reached, the second comparison device 39
Temporarily stops the operation of the drive motor 8a, deenergizes the three-way solenoid valve of the corresponding dispenser, and opens the valve open circuit on the stock solution tank side. Then, the second comparison device 39 drives the drive motor 8a again in the forward direction of the drive rod 12.

Hereinafter, the control device 30 is configured total dispense apparatus 1 -1, 1 -2, ...
... The above-mentioned operation is repeated until 1- n reaches the target pouring amount.

The operation of the control device 30 will be described in detail below with reference to the flowcharts of FIGS.

When the device power at step S ₁ is turned on (ON), the signal for the entire three-way port solenoid valve in step S ₂ and the non-energized state is output, the drive motor rotates counterclockwise in step S ₃ To start.

The drive motor operates until the reverse control limit switch operates in step S ₄ , and the reverse motor limit switch operates in step S _{5 to} stop the operation of the drive motor.

In step S _{6, the} cumulative pulse number Pi is set to zero, and in step S _{7, the} number of times stored in the number-of-times storage device is set to the maximum value of the number of times of dispensing n.

In steps S ₈ and S _{9, the} number of pulses P ₀ i per unit dispensing amount of each dispenser is read.

Reads the stock name at step S _10, reads the target note volume Qi at step S _11, step S ₁₂ and the dispenser unit dispensing amount per pulse number P ₀ i that corresponds to this step S ₁₃
From this, the target injection pulse number PQi is calculated for each dispenser.

Read the maximum number of pulses Pm at step S _14.

Read the initial number of pulses Pn required for bubble purging in step S _15.

When the operation start command signal is input in step S ₁₆ , the drive motor rotates in the forward direction of the drive arm (clockwise rotation) in step S ₁₇ .

In step S _18, the pulse signals output by the rotary encoder are integrated as the drive arm advances.

The number of pulses Pi accumulated in step S ₁₈ and the initial number of pulses P
and n is compared in step S _19, as well as pause the operation of the drive motor at step S ₂₀ when the integrated pulse number Pi has reached the number of initial pulses, zeros the accumulated number of pulses Pi in step S ₂₁ set the energization (oN) to all the three-way port solenoid valve in step S ₂₂ the signal is output. Incidentally, to the initial number of pulses Pn reaches the pulse number Pi is is repeated from step S ₁₇ to step S _19.

After at driving a motor-stop, the drive motor is operated in the clockwise direction again in step S _23. Output to pouring the number n of times the storage device at step S ₂₄ it is determined whether or not a zero.

When pouring the number n is zero, is compared with the target pour pulse number PQi the cumulative pulse number Pi of the dispenser at step S _25, when these numbers two pulses coincide, step
Drive motor at S ₂₆ is suspended, the three-way port solenoid valve corresponding to the dispenser to said number of pulses match in step S ₂₇ will be de-energized (OFF state). Incidentally, until the accumulated number of pulses Pi reaches the target dispense pulse number PQi repeats the steps S ₂₂ to step S _25.

Whether there is a dispenser which does not reach the target dispense volume at step S ₂₈ it is determined, if not, whether issued any stock set to all dispenser at step S ₂₉ Notes Judged,
If the undiluted solution has been dispensed from all dispensers, the solution preparation is completed. If there is a dispenser that has not reached the target dispensing amount in step S ₂₈ , steps S ₂₂ to S ₂₇
Is repeated.

In step S _24, if the output is pouring number n of times the storage device is not zero, the piston of the dispenser at step S _30, after whether reaches the maximum distances set is determined, the maximum distance together with the signal for stopping the drive motor is outputted at step S ₃₁ when reached, step S
_{At 32,} all three-way solenoid valves are de-energized (off).

The drive motor at step S _33, and left rotation at step S ₃₄ until the limit switch is turned on, the drive arm is retracted.

Limit switches at step S ₃₄ that is turned on, the drive motor is temporarily stopped in step S _35, minus one from the dispensing times are stored in the frequency storage unit in step S ₃₆ with value is set, the number of pulses emitted by the summing device at step S ₃₇ is set to zero.

After step S ₃₇ has been executed, the process returns to step S _17, thereafter, in step S ₂₄ until the dispensing times n output from the frequency storage unit becomes zero, i.e. all dispenser is in discharge amount target Notes Until reaching step S ₁₇ to step S ₂₄ and step S
₃₀ step S ₃₇ are repeated.

The automatic liquid adjusting apparatus of the present invention which executes the above-described operation is integrally formed with a case 20 having a U-shaped side surface as shown in FIG.

A lid 24 that can be opened and closed by a hinge 23, for example, is provided on the upper stage portion 22 of the U-shaped case 20, and the dispenser installation portion 25 and the nozzle header installation portion 26 are stored in the lid 24.

Incidentally, pipettor installing portion 25 is provided at a position lower than the upper plate 20a of the case 20, the dispenser installing portion 25 in the present embodiment, as shown in FIG. 8, the dispenser 1 -1 , 1-2 , ... And the three-way solenoid valves 3-1, 3-2, .. are arranged in parallel, and a plurality of square seat plates 54 are arranged in parallel. or,
Each dispenser is a dispenser fixing base 53a fixed on the seat plate 54.
And a dispenser fixing base 53b that is detachable from the dispenser fixing base 53a.
It is fixed by sandwiching the cylinder of the dispenser with.
In addition, since FIG. 8 shows the case where there is only one dispenser, the liquid supply pipe 15-1 and the injection pipe 2-1 are directly connected to the three-way solenoid valve 3-1 and the stock solution tank 4-1. Although connected to the receiver 5, the liquid supply pipe 15-1 is provided with a pipe joint 56 and the injection pipe 2-1 is provided with a nozzle header 19 as described later. Further, the rod 51a of the joint 51 of the rear wall 25a of the dispenser installation portion 25 penetrates, and although not shown, the drive arm 7, the dispensing drive device 8 and the like are provided on the back side of the rear wall 25a. Has been.

Further, the nozzle header installation portion 26 is provided at a position lower than the front side in the dispenser installation portion 25 of the dispensing device installation unit 25, the dispenser 1 -1 in central, 1 -2, ... 2-1 extending from the injection tube
Nozzle header 19 provided with a plurality of holes 19a formed on a concentric circle is provided.
Further, the undiluted solution drips on the lower surface of the nozzle header 19,
An outflow pipe 18-1 communicating with a is provided. Also, each dispenser
1 -1, 1 -2, injection tube 21 and 22 extending from ......, ......
Is to be piped to the nozzle header 19 so that liquid cannot be accumulated.

In the space 27 of the lower part 29 of the U-shaped case 20, the receiver 5 for receiving the undiluted solution poured from the nozzle header 19 is placed on the container stand 28.

Further, the lower part 29 of the case 20 is provided with an operation panel 21 on which numerical keys 21a for inputting data necessary for executing automatic liquid adjustment are arranged, and the operation panel 21 is easy for an operator. It is formed to be inclined so that it can be operated.

The stock solution tanks 4-1 and 4-2 are installed separately from the automatic solution adjusting device, and the solution supply pipes 15-1 and 15-1, which extend from the stock solution tanks 4-1 and 4-2 ,. 15-2, ... Are connected to a piping joint 56 provided on the outer surface of the case 20. And case
Supply pipes 15-1, 15 connected to pipe joint 56 in 20
-2, ... is a three-way solenoid valve 3 in the case 20 of the automatic liquid preparation device.
It is connected to -1,3-2, ....

[Effects of the Invention] According to the present invention as described above in detail, since the drive arm and the piston of the dispenser are directly connected, the drive arm and the piston of the dispenser are inadvertently separated from each other, or the drive arm is unintentionally separated. There will be no deviation in the amount of movement between the piston and the piston.
Further, since the drive arm and the piston of the dispenser are mechanically connected to each other, heat is not generated, the volume of the dispenser is not changed by the heat, and the accuracy of the liquid preparation amount is improved.

Further, the drive arm retracts to the position of the detector to suck the undiluted solution into the dispenser, and the drive arm moves forward by a predetermined amount to remove bubbles mixed in the dispenser from the dispenser. A pouring preparation device that discharges the stock solution to the tank side, and a drive motor when the pouring amount reaches the target pouring amount set for each dispenser after starting the pouring of the stock solution from the dispenser to the receiver side. It is equipped with a pouring stop device that stops the rotation of the dispenser and switches the three-way solenoid valve connected to the dispenser to the stock solution tank side. Even if it is mixed in, the bubbles are returned to the stock solution tank before pouring the stock solution to the receiver side, and then the pouring amount is detected while pouring the stock solution from each dispenser to the receiver side. Therefore, the accuracy of the amount of undiluted solution dispensed from each dispenser is high.

Furthermore, since a proper ball slide is selected for the sliding part between the guide rail part and the drive arm, the drive arm always moves at a right angle to the left and right guide rails, and the piston movement amount of the dispenser varies. Things will disappear. Therefore, it is sufficient to provide one detector for detecting the movement amount of the piston in the drive rod portion provided at the center of the drive arm, and only one detector is required, which also contributes to cost reduction.

[Brief description of drawings]

1 and 2 are schematic diagrams showing an embodiment of a mechanical portion of the automatic liquid preparation apparatus of the present invention, and FIG. 3 is a block diagram mainly showing the configuration of a control device in one embodiment, and FIGS. 6
FIG. 7 is a flow chart for explaining the operation of the embodiment, seventh.
FIG. 8 is a perspective view showing the outer shape of the automatic liquid preparation apparatus of the present invention,
FIG. 9 is an inclined view showing a configuration from liquid absorption to pouring by a dispenser of the automatic liquid preparation device of the present invention, and FIG. 9 is an inclined view showing a coupling used in the automatic liquid preparation device of the present invention, FIG. 10 is a plan view of the coupling shown in FIG. 9, and FIG. 11 is a front view showing only the section AA in FIG. 10 as a cross section. 1 -1, 1 -2, ............ dispenser, 1 -1b, 1-2b, ............ piston, 2-1, 2-2, ..... and liquid feed line, 3-1, 3-2, ...... 3-way solenoid valve, 4-1, 4-2, ... stock solution tank, 5 ... receiver, 7 ... drive arm, 8 ... dispensing drive device, 14 ... … Rotary encoder, 17 …… Limit switch, 30 …… Control device.

Claims (3)

[Claims] 1. A plurality of dispensers that absorb liquid into the cylinder or pour liquid out of the cylinder by movement of pistons, and when the liquid is sucked, the pistons of each dispenser are simultaneously drawn to a predetermined position in the suction direction. The initial withdrawal means that moves the piston in each dispenser to the specified position at the same time by moving the piston of each dispenser to the specified position after inhaling the liquid. When the liquid is poured out, the pushing back means pushes back the piston to the position where the set amount of liquid for each dispenser is poured out, and when the liquid is poured out, the residual liquid in the cylinder is poured into a predetermined container. An automatic liquid preparation device comprising a pouring means for discharging. 2. A three-way solenoid valve provided on each of a plurality of stock solution tanks for storing a stock solution to be prepared, a receiver for containing the preparation solution, and a liquid supply pipe for feeding the stock solution in each stock solution tank to the receiver. A dispenser whose connection is switched to the stock solution tank side or the receiver side via a dispenser, and a dispenser drive device capable of simultaneously advancing or retracting the piston of each dispenser via a drive arm directly connected to the piston. , A movement amount detector that detects the movement amount of the drive arm, a detector that detects the backward limit position of the drive arm, a signal that reverses the rotation direction of the drive motor of the dispensing drive device, and connect to each dispenser The liquid suction means that outputs a signal to switch all three-way solenoid valves to the stock solution tank side, and the pistons of all the dispensers are moved to reach a predetermined amount, and when the predetermined amount is reached, the dispensing is performed. Stop the rotation of the drive motor of the drive A pouring preparation means that outputs a signal to stop and a signal that switches all three-way solenoid valves for each dispenser to the receiver side, and a calculation that calculates the amount of undiluted solution that each dispenser dispenses to the receiver side Means, and the pistons of all the dispensers are moved until the amount of undiluted solution to be dispensed from each dispenser calculated by the computing means reaches the target dispense amount set for the dispenser. A pouring stop means for outputting a signal for stopping the rotation of the drive motor of the dispensing driving device and a signal for switching the three-way solenoid valve connected to the dispenser to the stock solution tank side when the dispensing amount is reached; An automatic liquid adjusting device comprising: a liquid absorbing means, a pouring preparation means, and a control means for controlling operations of the pouring stopping means. 3. A substantially U-shaped case having an upper support base and a lower support base formed below the upper support base with a predetermined space, and a plurality of dispensers provided on the upper support base. And a container stand mounted on the lower support, for holding a volume of liquid to be poured out from the dispenser, and an operation panel provided at the tip of the lower support. An automatic liquid preparation device.