JPS59141931A - Abnormality missing preventing apparatus of endoscope washer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an abnormality oversight prevention device for an endoscope washer that prevents the endoscope washer from operating while overlooking an abnormal state of the endoscope washer.

The endoscope cleaning machine stores the endoscope in cleaning tank C2, and washes the endoscope with water, detergent, and disinfection. It is designed to be carried out in a timely manner. The cleaning process using this endoscope cleaning machine, for example, the cleaning process that proceeds with water washing, detergent washing, disinfection, and water washing (in the second case, the time for each process is set to a time that allows each process to be completed completely. In a scope washer, if an abnormality occurs during the cleaning process, the cleaning will be stopped and an abnormality notification will be issued.After the abnormality is taken care of, the abnormality will be notified when the power supply is disconnected and turned on again. However, if the process in which the abnormality occurred is overlooked, the cleaning process may proceed while the overlooked process remains incomplete, leaving the endoscope in an incompletely cleaned state.For example, During rinsing after detergent cleaning, a power outage occurs and the rinsing is interrupted, and when the power supply is resumed, the next cleaning step may proceed with the rinsing incomplete.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an apparatus for preventing an abnormality from being overlooked in an endoscope washer, which can reliably detect an abnormality when it occurs during operation of the endoscope washer.

The present invention will be described in detail below with reference to one drawing.

According to Figure 1 C2, latch relay 1 is set coil I.
2 and reset coil 13? have

One end of set and reset coils 12 and 13 is +5V
The other ends are connected to the collectors of transistors 14 and 15, respectively.

Diodes 16 and 17 are connected in parallel to the set and reset coils 12 and 13, respectively.

Resistors 18 and 19 are connected between one end of set and reset coils 12 and 13 and the bases of transistors 14 and 15, respectively, the emitters of transistors 14 and 15 are grounded and the bases are connected to the collector-emitter paths of transistors 20 and 21. are grounded through each. The bases of transistors 20 and 21 are connected to the collector of transistor 28 through resistors 26 and 27, respectively, and to the power supply through resistor 29. The +5■ power supply is grounded via a diode 30 and a capacitor 31. The connection point between the diode 30 and the capacitor 31 is the voltage dividing resistor 32 and SS? It is grounded via r'. The connection point of the voltage dividing resistors 32 and 33 is connected to the inverting input terminal of the operational amplifier 34. The non-inverting input terminal of the operational amplifier 34 is connected to the input terminal, and the output terminal is connected to the base of the transistor 28 via a resistor 36. Is the control circuit 35 in the operating state of the latch relay 11? It is connected to a latch relay 11 for monitoring.

In the above configuration, a set signal is supplied via the OR gate 22 and the diode 23 when the first start button is pressed at the start of the cleaning process of the endoscope washer. This turns on the transistor 14, energizes the set coil 12, and sets the latch relay 11. At this time, is the endoscope washer cleaning process? Start.

When the cleaning process progresses smoothly and the final process is completed, a reset signal is generated, and this reset signal is input to the circuit of the latch relay 11 via the OR gate 24 and the diode 25. When the transistor is turned on by the reset signal, the reset coil 13 is energized and the latch relay 11 is reset. The control circuit 35 recognizes from the open/closed states of the contacts of the latch relay 11 that the cleaning process has been completed without any abnormalities.

If a water supply abnormality or the like occurs in the cleaning process, for example in the rinsing process, a water supply abnormality detector (not shown) detects the water supply abnormality. If an abnormality is detected, the rinsing process is stopped and an abnormality is indicated by a buzzer or lamp. At this time, the latch relay 11 is held in the set state (2).

When a reset button (not shown) is pressed after taking action for the abnormality, a reset signal is supplied to the latch relay circuit through the OR gate 24 and the latch relay 11 is reset. If an attempt is made to start the endoscope washer without noticing the occurrence, the control circuit 35 detects the set state of the latch relay 11 and does not start the cleaning operation. This allows you to know that there is an abnormality.

If a power outage occurs as an abnormality, it is conceivable that the reset coil 13 will be energized by the unnecessary output generated at the time of the interruption, but in this case, the power outage compensation circuit 37 will compensate for the power outage accident. That is, when a power outage occurs, the voltage of +5V DC drops rapidly as shown by the solid line in FIG. At this time, the voltage of the capacitor 31 gradually decreases as shown by the broken line C in FIG. capacitor 31
The voltage at the dividing point P gradually decreases in response to the voltage drop. Since the operational amplifier 34 compares the power supply voltage with the voltage dividing point P, there is a predetermined delay time after a power outage occurs until the power supply voltage and the divided voltage match. During this delay time, the output Q of the operational amplifier 34 is maintained at a high level, so the transistor 28 is in the ON state. Therefore, transistors 20 and 21 are kept in an OFF state, and set coil 12 is energized. Therefore, even in the event of a power outage, the set state of the latch relay 11 is maintained.

When the power supply voltage and the divided voltage match, the output Q of the operational amplifier 34 becomes the Mr. I level, and the transistor 28 turns OFF.
r2 is done. Along with this, transistors 20 and 21
is turned on, and transistors 14 and 15 are turned off. Since the latch relay 11 is mechanically held in the set state at this time, the latch relay 11 remains in the latched state even when the power outage is restored. Therefore, if you operate the endoscope washer without noticing a power outage, the control circuit 3
Is 5 the set state of latch relay 11? It detects and notifies you of an abnormality, that is, a power outage. The operator can recognize that the cleaning process is incomplete due to a power outage and can restart the cleaning process.

Note that the values of the capacitor 31 and the resistors 32 and 33 in the power failure compensation circuit 37 are set so that the voltage at the voltage dividing point P is slightly higher than the lower limit of operation of the circuit system, 4.75V.

As explained above, according to the present invention, when an abnormality occurs in the endoscope washer, the latch means is held in the set state, and by monitoring the state of the latch means, it is determined whether or not an abnormality has occurred. This prevents the endoscope washer from being activated due to an abnormality being overlooked, and the endoscope can always be thoroughly cleaned.

In the embodiment, the set state is monitored to determine whether there is an abnormality, but is it a reset state? The presence or absence of an abnormality may be determined by monitoring. It is also possible to set a latch relay when an abnormality occurs.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram of an abnormality oversight prevention device for an endoscope washer according to an embodiment of the present invention, and FIG. 2 is a time chart diagram illustrating the operation of the abnormality oversight prevention device of FIG. 1. . 11... Latch relay, 12... Set coil, 1
3... Reset coil, 35... Control circuit, 37.
...Power outage compensation circuit. Applicant's agent Patent attorney Takehiko Suzue＋
I Procedural Amendments March 9, 1982 Kazuo Wakasugi, Commissioner of the Japan Patent Office 1, Indication of the case, Patent Application No. 17002-1982, Title of the invention: Abnormality oversight prevention device for endoscope washer 3, Amendment Relationship with the case of a person who does

Claims (4)

[Claims] (1) A latching means that is put into a first state when the cleaning process starts and put into a second state when the cleaning ends, a means that detects an abnormality in the endoscope washer, and a latch means that detects an abnormality in the endoscope washer, and An abnormality oversight prevention device for an endoscope washer, comprising means for holding a first state of the latch means (latch means), and means for displaying an abnormality when detecting the first state of the latch means at the time of resuming cleaning. (2) An abnormality monitoring prevention device for an endoscope washer according to claim 1, wherein the abnormality detection means is means for compensating for a power outage. (3) An abnormality oversight prevention device for an endoscope washer according to claim 1, further comprising means for resetting the latch means in a set state due to an abnormality after the abnormality is released. (4) The power failure compensating means is constituted by means for maintaining the latch means at a potential higher than the deactivation potential for a predetermined period of time from the time of the power failure in order to prevent the latch means from being reset due to unnecessary output generated at the time of the power failure. An abnormality oversight prevention device for an endoscope washer according to claim 2.