JP2011242215A - Function of operation confirmation in foreign body inspection device and foreign body inspection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a function for surely performing a confirmation of operation in a step of inspection using a foreign body inspection device requiring a confirmation of the operation.SOLUTION: A foreign body inspection device is provided with a function as follows. When a confirmation of operation is needed, the corresponding function is made effective. Once the function becomes effective, the analyte which firstly passes is considered as a test piece containing foreign body. When the foreign body detection part generates a defect signal, the return to the normal state is performed, assuming that the operation confirmation is performed. When the foreign body detection part generates no defect signal, it is considered as a case in which the operation confirmation is forgot or missed or the foreign detection part is abnormal, an abnormality alarm is issued.

Description

  The present invention relates to a foreign object inspection machine that performs operation confirmation using a test piece in which a foreign object is artificially mixed into an object to be inspected.

  Conventionally, in food manufacturing factories, clothing manufacturing factories, bedding manufacturing factories, foreign matter mixed in raw materials, foreign matter due to damage to manufacturing equipment, foreign matter such as broken pieces of sewing needles, etc., enter the manufactured product. There is. In order not to ship defective products mixed with foreign matters (hereinafter referred to as defective products), foreign matter inspection machines for detecting and separating foreign matters are used in the raw material receiving process and the product shipping process. When the foreign object inspection machine determines that the product is defective, the defective product discharge device operates to prevent the defective product from being separated from the non-defective product.

  The foreign matter detector mounted on the foreign matter inspection machine has an X-ray foreign matter detector that detects metals, glass, stones, bones, etc. using X-rays, and a metal detector that detects metals using electromagnetic waves. An optical foreign object detector that detects foreign substances by light transmission or reflection is used.

  In the inspection using the foreign substance inspection machine, a test piece (hereinafter referred to as a test piece) in which a foreign substance is artificially mixed into the object to be inspected in order to confirm whether or not the foreign substance inspection machine is operating normally. An operation check operation is performed to determine whether or not the defect is normally judged and separated as a defective product by passing through the entrance side of the foreign object inspection machine.

JP 2003-315286 A JP 2007-10349 A JP 2007-312651 A

  Conventionally, in work processes that have been inspected using a foreign substance inspection machine, in order to check whether the foreign substance inspection machine is operating normally, the test piece is passed through from the entrance side of the foreign substance inspection machine. An operation confirmation operation is performed to confirm that the determination is performed normally and is classified as a defective product. This operation check work is performed at the start of work, at the start of work after a break, at the time of switching the production type, or at regular intervals. However, even if this operation check work is required, it is possible that the worker forgets or neglects this work.

  If the foreign matter detection unit of the foreign matter inspection machine is not operating normally due to a failure or detection sensitivity setting failure, etc., if the manufacturing operation is continued when the conditions for forgetting to check the operation or neglect are neglected, Since a defect signal is not output even if it passes through the detection unit, there is a problem that it is not sorted as a defective product and shipped as a non-defective product.

  In order to solve the above-mentioned problem, the control device for a foreign substance inspection machine according to the present invention provides a control unit that detects a foreign signal mixed in an object to be inspected that has passed through the foreign substance detection unit first after the function is enabled. When a signal is input to the controller, it outputs a defect classification signal and does not output an abnormality alarm signal. At this time, when a signal for detecting a foreign object is not input to the control unit, it has a function to output a defect classification signal and output an abnormality alarm signal. ing. In addition, a function for executing the function at power-on is also provided.

  In this way, if the test piece is first passed when the function is valid, if the foreign object detection unit is normal, a defect signal indicating foreign object detection is input from the foreign object detection unit to the control unit. A process for outputting a classification signal and not generating an abnormal alarm signal is executed. Therefore, since the test piece is classified as a defective product and no abnormality alarm is issued, the manufacturing operation can be continued after passing the test piece. When the foreign matter detection unit is abnormal, a failure signal is not input to the control unit, so a failure classification signal is output and an abnormality alarm signal is output. For this reason, the test piece is classified as a defective product and an abnormal alarm is issued.

  Also, if you forget or neglect the operation check work with the test piece, this function is effective. Regardless, since a defect signal is not input to the control unit, a defect classification signal is output, and even if it is a normal product, it is classified as a defective product and an abnormal alarm signal is output. Further, when the product that has passed first is a defective product, it is the same as when the test piece is passed.

  In this way, when the function is valid and an abnormality alarm is issued, it is found that the operation check operation using the test piece has been forgotten or neglected, or that the foreign substance inspection unit has an abnormality.

  If a foreign substance inspection machine equipped with the function of the present invention is used to enable the function when it is necessary to check the operation, an abnormality alarm will be issued if the test piece or defective product is not passed first during the operation check. . When an abnormal alarm is issued, if you forget or neglect to check the operation of the foreign object detector using the test piece, it is canceled by passing the test piece through the foreign object inspection machine, and an abnormal alarm is issued if there is an abnormality in the foreign object detector. Since it is not canceled, the cause of the abnormal alarm is revealed. As a result, there is an effect that the operation confirmation by the test piece or the defective product is always performed when the operation confirmation is necessary.

  Embodiments according to the present invention will be described below with reference to the drawings.

  FIG. 2 shows a conceptual diagram of one implementation of a foreign matter inspection machine according to an embodiment of the present invention. It consists of a foreign matter detection unit 1, a conveyor 2, an operation and display unit 3, a passage sensor 4, a defective product classification unit 5, a control unit 7, a conveyor drive unit 8, and an abnormality alarm unit 9. FIG. 3 is a schematic block diagram showing an embodiment of the foreign matter inspection machine according to the embodiment of the present invention.

FIG. 1 is a flowchart showing the basic operation of a foreign matter inspection machine including the function of the present invention.
In step S1, it is confirmed whether the function is enabled. If it is valid, it waits for the inspected object 6 to pass in step S2. Once the passage sensor 4 is turned on and the passage of the inspection object 6 is detected, steps S4 to S6 are looped. When the signal from the passage sensor 4 is turned off, the passage is completed. In step S7, it is confirmed whether or not there is a signal input from the foreign object detector 1 while the inspection object 6 is passing and step S5 is executed. If step S5 has been executed, it is considered that the test piece has been flown and the operation confirmation has been executed, and step S8 defective product discharge processing is executed, which is separated from non-defective products and discharged as defective products. Thereafter, the foreign object detection holding held in step S5 is canceled in step S9, the function is released in step S10, the process returns to step S1, and the normal processing after step S13 is executed.

  If there is no signal input from the foreign object detector 1 while the inspection object 6 is passing in step S7 and step S5 is not executed, the test piece has been forgotten or neglected, or foreign object detection Assuming that there is an abnormality in the container 1, step S11 defective product discharge processing is executed, and even a non-defective product is sorted and discharged as a defective product. Thereafter, an abnormality alarm is issued in step S12. At this time, since the function is not released, steps S1 and S2 are executed and the passage of the object to be inspected is again waited.

Here, when the next inspection object passes, the alarm is canceled in step S3. At this time, if the test piece or defective product passes and step S5 is executed, step S10 is executed from step S8, the function is canceled, and then normal processing after step S13 is executed.
However, if the defect detection unit 1 does not generate a defect signal and the passage is completed without executing step S5 even though the test piece is passed, it is found that the foreign object detection unit 1 is abnormal for some reason. .

  Steps S13 to S19 are normal processing in which the function is not effective. If a foreign object detection signal is output from the foreign object detector 1 when the inspection object 6 passes, a defective discharge process is performed in step S18 and the product is classified as a defective product.

The flowchart of FIG. 1 shows the basic concept, and in producing the program, as shown in FIG. 2, between the passage sensor 4 and the foreign matter detection unit 1, and between the foreign matter detection unit 1 and the defective product classification unit 5, Each has a distance, and the time required for the inspection object 6 to travel from the passage detection sensor 4 to the foreign object detection unit 1 and the time required for the inspection object 6 to travel from the foreign object detection unit 1 to the defect classification unit 5 are necessary and must be considered. There is. This time can be calculated by knowing the conveyor speed and the respective distances.

  The defective product separation unit 5 is a part for separating defective products from normal products, considering the weight and shape of the inspected object 6 and using a cylinder or the like that separates from the conveyor through which normal products pass by blowing air. It is necessary to use one that is pushed out and separated from a conveyor through which normal products pass.

  The control unit 7 includes a microcomputer and a sequencer, and executes programs such as input / output control. The operation display unit 3 cooperates with the control unit 7 to perform operations necessary for the foreign substance inspection machine, setting of each constant, and various displays. The alarm output unit 9 is necessary for notifying the operator of abnormality or caution of the foreign substance inspection machine, and an alarm by a buzzer, an alarm by sound, and an alarm by a patrol are used. The conveyor drive unit 8 performs conveyor stop and speed control.

In this way, if a foreign substance inspection machine incorporating this function is used, even if the operation check of the foreign substance inspection machine is forgotten or neglected, if the foreign substance detection unit is abnormal, it is determined when the function is valid.
If the function is enabled at the time of power activation as in claim 2, the operation check is always executed every time the power is activated. Furthermore, since this function can be enabled on a program, it can be enabled at the start of work after a break, at the time of switching the production type, or at regular intervals.

It is a flowchart which shows the basic operation | movement of the foreign material inspection machine containing the said function of this invention. It is a conceptual diagram of one implementation of the foreign material inspection machine by embodiment of this invention. 1 is a schematic block diagram of an embodiment of a foreign matter inspection machine according to an embodiment of the present invention.

DESCRIPTION OF SYMBOLS 1 Foreign object detection part 2 Conveyor 3 Operation, display part 4 Pass sensor 5 Defective product discharge part 6 Inspected goods
7 Control unit 8 Conveyor drive unit 9 Abnormal alarm unit

Claims (2)

In a foreign object inspection machine that checks the operation using a test piece that is artificially mixed with a foreign object in the inspection object,
When one of the functions activated by a command from the control unit is input to the control unit, a defect signal that detects foreign matter mixed in the object to be inspected that first passed through the foreign object detection unit after the function was started A foreign matter inspection machine having a function of issuing a failure classification signal and not issuing an abnormality alarm signal, and at this time, when a signal for detecting a foreign matter is not input to the control unit, outputs a failure classification signal and outputs an abnormality alarm signal.   A foreign matter inspection machine, wherein the function according to claim 1 is enabled at the time of power activation.