JPS5855062B2 - If you have any questions or concerns, please contact us. - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for handling missing tablets in an automatic tablet packaging machine used particularly in hospitals.

In recent years, automatic tablet counting and packaging machines have been developed that divide and package various tablets into fixed quantities in order to automatically and quickly administer medication in hospitals.

Figure 5 shows the approximate number of automatic tablet dividing and packaging machines, which are equipped with a large number of tablet accommodating hoppers A for each type of tablet, and are capable of manually specifying the type, quantity, number of parcels, etc. of tablets. , Based on this input take, a predetermined hopper A is driven to extract the tablets to a gathering hopper B, and after the tablets of one color held by the gathering hopper B are introduced into the packaging section C, they are folded into two, for example. The product is injected into a small bag formed by vertically sealing the wrapped wrapping paper, and the opening of the small bag is sealed to divide the bag into separate packages.

Accidents of missing tablets often occur when tablets are not extracted properly from Homper A in such packaging machines, but in such cases,
Wrong packaging can lead to severe disruption to hospital medication operations.

In view of the above, the present invention is designed to detect a missing tablet in the hopper storing tablets during dividing and packaging of tablets of a predetermined type, a predetermined quantity, and a predetermined number of packets. The present invention also provides a processing method that promptly stops the operating mechanism and eliminates the cause of the locking of the locking hopper.

Figure 1 shows the sequence circuit and control circuit.
A is the main sequence that performs normal counting and packaging operation when there are no missing locks in the hopper, and the cent input signal g1 which is the start signal and the cent output CA of the control JK flip-flop CA and the JK flip-flop, which will be described later. CB reset output CB AND output via AND gate 32! ! 2 is the reset input.

CA has the set output signal of the main sequence SA as its set input, and the AND output g2 as its reset input.
The K flip-flop, SB, is the other main sequence to which the AND output g2 is added.

Fig. 2 shows a drive circuit 1 that drives the unlocked hopper in order to eliminate the cause of the unlocked hopper, and 5c-1 is a check key that is pressed after the hopper becomes unlocked and the packaging operation stops. A branch sequence in which the suppression signal g7 is input and a one-word time set state is set, CD is this branch sequence S
The JK flip-flops 12° . For example, 20 AND gates corresponding to 20 hoppers with X2... drive circuit,
5c-2 is a branch that receives a reset signal g3 that is generated after a certain period of time has elapsed after the JK flip-flop CD is set, for example, the time required to drive a hopper, and then maintains the set state for one word period. At this time, the reset signal g7 is simultaneously applied to the reset input of the JK flip-flop CD to reset the JK flip-flop CD.

Incidentally, a missing tablet is detected by, for example, placing a sensor in the tablet extraction path of a hopper and detecting whether a detection signal from this sensor is sent from the hopper to which a drive signal has been applied.

Reference numeral 5c-2 is a branch sequence which receives the output signal from the branch sequence 5c-2 and enters the set state at the next 1-word time delayed by 1-word time from the output of this branch sequence 5c-2.

Figure 3 is a determination circuit that determines the presence or absence of a missing hopper.
A is the second register that stores the type and quantity of tablets entered by key operation before the start of the packaging operation, and rB is the second register in which the detection signal from the hopper sensor is written. If there are no missing tablets in the stored tablets, the same content is written, and the signal from the hopper with missing tablets is not written.

Therefore, the contents are the same as the contents of the second register rB, and when there is a missing hopper, the contents are only the tablets in the missing hopper.

22 is the main sequence SA and JK flip-flop CA
23 is an AND gate to which the output signal Sc-2 of the branch sequence 5c-2 and the signal of the first register rA are added; 24 is the same branch. Sequence 5C-2
25 is an AND gate to which the output signal 5c-2 of and the signal of the second register rB are added, and 25 is an AND gate in which the signal from the first register rA and the output g3 of the AND gate 22 are manually input.
The gate 26 is an AND gate HA which uses the signal from the second register rB and the output g3 of the AND gate 22.
is a comparison/judgment device in which the outputs of the AND gates 23 and 25 are used as one input 27, and the outputs of the AND gates 24 and 26 are used as the other input 28. For example, a half adder,
Cc is the judgment output of the half adder HA and the branch sequence 5c
-2 output via AND gate 31 is a JK flip-flop whose set input is the AND output, CB is the AND gate 2 of the half adder HA and the output g3 of AND gate 22.
The AND output via 9 is set input, and the branch sequence 5c-s and the reset output C of the JK flip-flop Cc.
This is a JK flip-flop whose reset input is an AND output via an AND gate 30 of C.

Next, the operation of the above-mentioned configuration will be explained using the waveform diagram of FIG. 4.

First, the main sequence SA starts to operate in response to the start signal g1, and the packaging operation starts for several times.

The input of the start signal g1 causes the main sequence SA to enter the set state, and after a delay of one word, the JK flip-flop CA
is set.

After 1 word time from this setting, JK flip-flop CA is set, and after 1 word time, main sequence SA is set.
and JK flip-flop CA is reset (waveform diagram A).

A determination as to whether or not the hopper is missing is made during one word time when the main sequence SA is in the set state and the JK flip-flop CA is in the reset state.

Therefore, when the set output signal SA of the main sequence SA in FIG. 1 and the reset output signal CA of the JK flip-flop circuit CA are generated simultaneously, an AND output g3 is generated at the AND gate 22 in FIG. Lock determination operation begins.

AND gate 2 which uses the signals from the first register rA and the second register rB and the AND output g3, respectively.
5 and 26 open, but if normal division and packaging is performed, the contents of the first and second registers rA and rB are the same, so their outputs are the same signal, and the half adder HA does not operate, so That output does not occur.

Next, when the hopper becomes unlocked (waveform diagram B), the signal of the unlocked hopper is not input to the second register rB, so when the main sequence SA is in the set state and the JK flip-flop CA is in the reset state, The output g3 of the AND gate 22, the outputs of the AND gates 25 and 26 which receive the respective inputs of the register rA and the second register rB do not match in the signal of the missing lock hopper, and in this case, the AND gate 25 only generates an output signal.

That is, one input 21 of the half-adder HA receives a signal and the other input 28 has no input, and the half-adder HA produces a decision output signal.

Then, the AND gate 29 is opened and the JK flip-flop CB is switched to the set state, so that the JK flip-flop CB outputs the set output signal CB.
AND gate 32 in FIG. 1 cannot obtain AND output g2, and main sequence SA and JK flip-flop CA maintain their set states and do not proceed to another sequence SB.

Therefore, the main sequence SA is stopped and the dividing/packaging operation is stopped.

Also, at this time, the JK flip-flop Cc, which is opened by the AND gate 31, maintains a reset state.

In this state, press the check key.

By this check key press signal g7, the branch sequence Sc
-+ is operated to generate a 1-word time set signal and set the JK flip-flop CD.

The set output signal of this JK flip-flop CD is AN
For example, when a hopper corresponding to AND gate 1 becomes unlocked, the hopper generates an unlock signal X1 and outputs the AND gate 1.
is opened and the hopper drive circuit 21 is operated to drive the missing hopper.

This hopper drive can be released if the cause of missing tablets in the pumper is stagnation due to clogging of tablets, etc.
Due to missing tablets due to the hopper being empty, the hopper must be refilled with tablets.

Next, after setting the JK flip-flop CD, the JK flip-flop CD is reset by a one-word time signal g8 generated after a certain period of time has elapsed, for example, a time sufficient to drive the hopper and the drive circuit 21. , stop the hopper drive.

This and the signal g8 generated at the 1st time are input to the branch sequence 5c-2, and the signal Sc delayed by 1 word from the signal g8.
-2 is generated for one word time.

During this one word period, when the signal 5c-2 is input to the AND gate 23.24 in FIG. 3, the contents of registers rA and rB are introduced to the half adder HA via the AND gate 1-23.24. Ru.

If the cause of the lock is removed by the hopper drive circuit 21, the AND gate 23 opens for one word.
The outputs of 24 are the same, and the output of the half adder HA is 27.28
Since the same signal is input to the JK flip-flop Cc, no judgment output is generated and the JK flip-flop Cc maintains the reset state.

In the next one word time, another branch sequence 5c-3 to which the signal of the branch sequence 5c-2 is added is set to generate a signal S c-3 for one word time.

Then, the AND gate 30 is opened by this signal 5c-3 and the reset signal Cc of the JK flip-flop Cc, and resets the JK flip-flop CB.

Therefore, the set output signal CA of the JK flip-flop CA
and reset output signal CB of JK flip-flop CB
When this occurs, the AND gate 32 shown in FIG. 1 opens and resets the main sequence SA and the JK flip-flop CA.

In this way, another main sequence SB is set, and this signal sets the main sequence SA, which starts the reloading normal dividing and packaging operation (waveform diagram C).

Furthermore, if the cause of the missing lock is still not cleared even after the hopper drive circuit 21 is once activated by the check key suppression signal, the contents of the first register rA and the second register rB still do not match, and the half adder HA outputs a judgment signal. is output, the JK flip-flop CB remains set, and the transition to the main sequence SA is not performed.

In such a case, it is necessary to press the check key again or investigate the cause and cancel the cause of the missing lock.

In addition, a display device is provided corresponding to each hopper, and the AND
By adding the outputs of the gates 1, 2, . . . , 20 to this display device and displaying a locked hopper using a lamp or the like, a locked hopper can be easily identified.

In short, when a tablet is missing in the hopper, the automatic tablet counting and packaging machine according to the present invention automatically stops the dividing and packaging operation, operates the missing tablet processing sequence, and receives a check key suppression signal from the operator. When the cause of the missing lock is removed by driving the missing lock hopper, the system automatically returns to the main sequence of performing the first divided packaging and performs the same split packaging operation as before the missing lock. This prevents erroneous splitting and packaging when locking, and all that is needed is to press the check key, which significantly reduces the amount of operation required by the operator.

Furthermore, after the missing tablet release process, there is an advantage that it is possible to continue dividing and packaging without erasing the initially stored contents such as the drug type and number of drugs.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the main sequence section of the embodiment of the present invention, FIG. 2 is a block diagram showing the same hopper and drive section, and FIG. 3 is a block diagram showing the determination circuit section for determining the presence or absence of a missing hopper. 4 are waveform diagrams of various parts of an embodiment of the present invention, and FIG. 5 is a schematic diagram of an automatic iron counter to which the present invention is applied. In the figure, SA and SB are the main sequences, Sc ll5c
-2,5c-3 are branch sequences, CA, CB. Cc, CD are JK flip-flops, HA is a half adder,
rA r rB are the first. The second register, 21, is the hopper drive enclosure.

Claims (1)

[Claims] 1. A first register that stores the type of tablet, its quantity, etc. by a predetermined setting operation, a second register in which the same contents as the first register are written when normal tablet counting and packaging is performed, and a second register that stores the same contents as the first register. and a comparison/judgment device that detects missing tablets in the ramper in which tablets are stored by comparing and determining the contents stored in the second register. When a missing lock is detected in the main sequence, the main sequence is stopped, the counting/packaging operation is disabled, and the branch sequence is activated by the check key signal to remove only the missing hopper.
A method for handling missing tablets in an automatic tablet counting and packaging machine, characterized in that the branch sequence is stopped when the cause of missing tablets is removed, and the main sequence is restarted to execute S1 number packaging.