JPS6024995B2 - Equipment non-operation detection method and device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for early detecting a failure or stoppage of mechanical equipment or a failure in parts transportation.

Generally, in a large-scale, integrated automated production line, if a simple failure or stoppage of mechanical equipment or a slight blockage on the transport path of parts occurs, it will not only cause the equipment in one process to stop working, but will have a large impact on the surrounding areas. There is a trend that causes a large to medium decline in the operating rate of the entire line.

Therefore, in order to prevent a decrease in the operating rate of the entire line, a method and apparatus for early detecting failures and stoppages of mechanical equipment and defects in parts transportation are needed. There are two types of conventional detection methods and devices for this type, which will be described later. The former is a part insertion time storage method, and consists of a detector for detecting component input, a detector for detecting component discharge, a storage device for storing the component input time, and a display device for displaying equipment abnormalities. When the input of a component is detected by the component input detector, the input time is stored in the storage device for each component, and the component discharge detector does not eject the component even after a certain period of time has elapsed from the input time of the first component to be discharged. If there is no signal, it is determined that the equipment is abnormal, and this fact is displayed on the display device. The latter is a parts number storage method, which consists of a storage device that stores the number of parts on the transport path, a parts ejection detector that detects the ejection of parts, and a display device that displays equipment abnormalities. The number of parts is memorized, and the number of parts is corrected when discharging the parts onto the transport path and when inputting them into the equipment. Unless the number of parts on the transport path is 0, the number of parts is stored within a certain time after the previous part is discharged from the equipment. The next part shall be ejected at the same time, and if it is not ejected, it is inoperable, and this will be indicated by the display device. However, the former is a method that stores the part input time for each part, and the latter is a method that stores the number of parts, and both require a large number of storage devices and complicated processing circuits, so equipment that handles a large number of parts This requires fairly sophisticated equipment, and if noise mixes into the signal from the equipment, malfunctions may occur due to parts being remembered incorrectly or errors in counting the number of parts. If the detection device is extracted from the system, the stored contents of the detection device will no longer correspond to the state of the equipment, and furthermore, if the detection device is started while the equipment is in operation, initial settings are required.

An object of the present invention is to provide a method and device for detecting equipment non-operation that improves the above-mentioned drawbacks.

In view of the shortcomings of conventional methods and devices using storage devices, the inventor has devised a method that is independent of the individual flow of parts.
If the equipment or transport route is in operation, the parts are always discharged after the machining time, transport time, etc. have elapsed since the input, and if the equipment or transport route is not in operation, the processing time, transport time, etc. have elapsed. Focusing on the fact that the parts will not be ejected even if the part is inserted, after a preset time has elapsed depending on the condition of the equipment or conveyance path from the time when the part input detector installed at the part input position detects the input of the part, When the parts discharge detector installed at the parts discharge position detects the discharge of parts, it is detected that an abnormality has occurred in the equipment or the conveyance path, and the system can be used without being affected by upstream or downstream equipment or the conveyance path. Moreover, the system detects non-operation of equipment or conveyance paths while ignoring the flow of individual parts. Further, according to the device invention, it is possible to detect non-operation of equipment or a transport path without using a storage device or a complicated processing circuit. EMBODIMENT OF THE INVENTION Hereinafter, a specific example of a method for detecting unbalanced equipment movement and an apparatus thereof according to the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a block diagram showing an embodiment of the equipment non-operation detection device of the present invention. The equipment non-operation detection device of the present invention in this embodiment includes a component immersion detector 1 and a component discharge detector 2 such as an optical sensor for detecting input and discharge of parts A, a non-operation detection device 3, and a non-operation detection device 3. It is equipped with a display device 4 that is activated by a signal from the detection device 3 and displays equipment abnormalities.

The non-operation detection device 3 includes an RS flip-flop 31 that measures the flow of parts A from the input detection time to the discharge detection time detected by the component input detector 1 and the component discharge detector 2, regardless of the individual flows of the components A; A timer 32 starts at the same time as the RS flip-flop 31 and sets the processing time and conveyance time in advance, and while the RS flip-flop 31 is measuring time, the time value is determined by the time value set by the timer 32 or the state of the equipment. It consists of a D flip-flop 34 that detects that the time value exceeds the specified time value and outputs a signal to the display 4 via the driver 33, and a state judgment circuit 35. When the equipment or conveyance path is operated, the state judgment circuit 35 When an operating signal is input to the D flip-flop 34 and the equipment and conveyance path are temporarily stopped due to a part-time change, etc., a part-time change in-progress signal is input to the state determination circuit 35, and a reset signal R is sent from the state determination circuit 35. is sent to the D flip-flop 34, and this D flip-flop 34 temporarily stops operating and does not output a signal to the display device 4 even if the loading and unloading time values of part A exceed the set time values.

As shown in FIGS. 2 and 3, the component input detector 1 and the component discharge detector 2 of the equipment non-operation detection device of the present invention are connected to the input side and the output side of the mechanical equipment 5, or between the equipment. They are installed on the input side and the discharge side of the conveyance path 6 such as a belt conveyor.

Next, a method for detecting equipment non-operation using the above-mentioned apparatus will be explained with reference to the flowchart of FIG. 4 and the time charts of FIGS. 5a and 5b. First, when the equipment and the conveyance path are normal, as shown in FIG. 6a, when the component input detector 1 detects the input of the component A, the RS flip-flop 31 is set S and the timer 32 is activated. , and when the component discharge detector 2 detects the discharge of the component A within the specified time T set in the timer 32, the RS flip-flop 31 is reset R, the D flip-flop 34 is not activated, and the display device 4 is not activated. do not. Next, if the equipment or conveyance path is abnormal (not in operation), as shown in FIG. If the component discharge detector 2 does not detect the discharge of the component A even after T has elapsed, the D flip-flop 34 is activated and a signal is output to the display device 4 via the driver 33, and the display device 4 is activated. to display the abnormality.

Then, when a malfunction in the equipment 5 or the transport team 6 is repaired and the component discharge detector 2 detects the discharge of a component, the D flip-flop 34 is reset R, and the display device 4 is reset to return to the initial state. . As described above, in the present invention, without being affected by the flow of individual parts, the equipment or When the parts ejection detector installed at the part ejection position does not detect the ejection of parts after the time set in advance on the time setting device based on the time normally required for the transport path, the equipment or the transport path Since it is designed to detect abnormalities in the parts, there is no risk of malfunction, and there is no influence from upstream or downstream equipment or conveyance routes, and even if parts are removed midway through, they can be put in. Even if the number of parts increases, it is possible to stably detect non-operation of equipment or transport paths. Further, according to the present invention, undesired movements of equipment or conveyance paths can be detected stably with a simple configuration without using a storage device or a complicated processing circuit as in the past, and without initial settings. be effective.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing an embodiment of the equipment non-operation detection device of the present invention, Figs. 2 and 3 are schematic diagrams of the device installed in mechanical equipment or a conveyance path, and Fig. 4 shows the operation. Fig. 5a is a normal time chart;
Figure b is a time chart during abnormality. 1... Parts input detector, 2... Parts discharge detector, 3... Non-operation detection device, 31...
...RS flip-flop, 32...Timer, 33
...Driver, 34...D flip-flop, 35...
...Status determination circuit, 4...Display device, 5...
Mechanical equipment, 6... Conveyance path, A... Parts. Na 2 Diagram O 3 Diagram Box * Soup 4 Diagram Shiozu Zuku)

Claims (1)

[Scope of Claims] 1. Based on the time normally required for the equipment or conveyance path, etc., from the time when the input of parts is detected by a component input detector installed at the part input position in the mechanical equipment or conveyance path, etc. When the parts discharge detector installed at the parts discharge position does not detect the discharge of the parts after the time set in advance on the time setting device has elapsed, it is detected that there is an abnormality in the equipment or the conveyance path. An equipment non-operation detection method characterized by: 2. The equipment non-operation detection method according to claim 1, characterized in that when the equipment or the transport path is temporarily stopped, no abnormality is detected in the equipment or the transport path. 3 In mechanical equipment or conveyance paths, etc., install a parts input detector at the parts input position and a parts detector at the parts discharge position, and from the time when the parts input detector detects the input of parts. A time setting device is provided to operate and set a time in advance based on the time usually required for the equipment or the conveyance path, and when the component discharge detector detects the discharge of a component, the time set by the time setting device is set. A facility characterized in that it is provided with a flip-flop circuit that is reset if the above-mentioned time has not yet elapsed, and which is reset if the above-mentioned time has elapsed, and a display device that indicates an abnormality in the equipment or the conveyance path based on the set output of the flip-flop circuit. Inoperability detection device. 4. The equipment non-operation detection device according to claim 3, wherein the flip-flop circuit is configured to be reset when the equipment or the conveyance path is temporarily stopped.