JP2020090289A - Optical sensor sign maintenance device and optical sensor sign maintenance method - Google Patents

Abstract

To make it possible to acquire change which indicates a malfunction sign before function of an optical sensor for detecting a mark for positional alignment is lowered and operation thereof becomes failure in a packaging machine, and to achieve maintenance of the optical sensor.SOLUTION: An optical sensor sign maintenance device 20 comprises: a received light amount acquisition unit 21 which acquires a received light amount of light which an optical sensor 10 receives from light reflected on a mark for positional mark and a background unit of the mark for positional alignment; an initial received light amount storage unit 22b which stores an initial received light amount of the optical sensor 10; a sign determination unit 22a which compares a current received light amount acquired by the received light amount acquisition unit 21 during operation of a packaging machine with the initial received light amount stored in the initial received light amount storage unit 22b, and determines such a sign that malfunction occurs in the optical sensor 10; and an alarm unit 23 which outputs a determination result of the sign determination unit 22a.SELECTED DRAWING: Figure 1

Description

The present invention relates to an optical sensor predictive maintenance device and an optical sensor predictive maintenance method in a packaging machine such as a horizontal pillow packaging machine, a vertical pillow packaging machine, an overwrapping packaging machine, and a deep-drawing packaging machine.

The packaging machine is a pillow packaging machine that sequentially fills a packaged product such as food and medicine into a tubular packaging material, and then seals and cuts the product to produce a package. There is an overwrapping packaging machine that covers individual or multiple items to be packaged, a deep-drawing packaging machine that forms a flat sheet into a container shape, fills the items to be packaged, and then seals with a lid material. There are a vertical pillow packaging machine that feeds the packaging material in the vertical direction (vertical direction) to fill the packaged items, and a horizontal pillow packaging machine that sends the packaging material in the lateral direction (the lateral direction) to fill the packaging items.
In such a packaging machine, a continuous packaging material (packaging film) is fed out by a feed roller from a winding packaging material wound in a roll shape, and after the article to be packaged is supplied, the packaging material is continuously produced at a constant timing. The packaging material is sealed and cut to produce a packaged body filled with the articles to be packaged.
In this case, in order to perform sealing and cutting at the sealing/cutting position of the packaging material, the registration mark printed on the packaging material, such as the registration mark, is detected by the optical sensor and the feeding amount of the packaging material is adjusted. Is done.
Here, if the packaging machine is used for a long period of time, the function of the optical sensor deteriorates due to deterioration or dirt of the optical sensor, and the optical sensor does not detect the alignment mark, resulting in malfunction. There is a case where an accident such as the fact that the seal and the cutting are not performed occurs, and the optical sensor has to be replaced, which causes a great hindrance to the production.
For this reason, it is desired to predict a malfunction due to deterioration of the optical sensor and replace the optical sensor before the malfunction of the optical sensor to prevent production hindrance of the packaging machine.

By the way, the detection of the mark by the optical sensor to perform the alignment is also performed in the printing apparatus which is an apparatus other than the packaging machine, and it is proposed that the printing apparatus also detect the deterioration of the optical sensor.
For example, in Japanese Unexamined Patent Application Publication No. 2015-24505, a printing device (thermal printer) that detects a mark on a sheet by an optical sensor (photosensor) and positions the sheet is used when there is no sheet. Detecting the deterioration of the photo sensor based on the history of the output level of the photo sensor (Claim 11, paragraph [0054] of Patent Document 1), or detecting the decrease in the light emission amount due to the voltage drop of the light emitting portion of the photo sensor. By doing so, it is disclosed that the deterioration of the light emitting unit is detected (claim 10 of Patent Document 1, paragraph [0078]).
However, in the printing apparatus (thermal printer) of Patent Document 1, the deterioration of the photo sensor is determined in order to determine whether the fluctuation in the decrease in the output level of the photo sensor is due to the uneven density of the marks or the deterioration of the photo sensor. However, the printing apparatus disclosed in Japanese Patent Laid-Open No. 2004-242242 does not predict a state in which the photo sensor malfunctions.
Further, in the packaging machine, the diaster mark is printed on a continuous packaging material (packaging film), and there is no paper-free (no packaging material) state as in the printing apparatus of Patent Document 1, and Patent Document 1 The method for detecting deterioration of the photosensor in the above cannot be applied to the packaging device.
Further, the malfunction of the optical sensor of the packaging machine is caused not only by the deterioration of the light emitting part but also by the contamination of the light receiving part, the deterioration of the optical fiber in the case of the optical fiber sensor, etc., and the deterioration of the light emitting part as in Patent Document 1. It is not possible to predict the malfunction of the optical sensor only by detecting (1).

JP, 2015-24505, A

The problem to be solved by the present invention is to maintain the optical sensor in a packaging machine by acquiring a change indicating the sign thereof before the function of the optical sensor for detecting the alignment mark is deteriorated to cause malfunction. Is to be able to achieve.

The invention according to claim 1 is a predictive maintenance device for an optical sensor that detects alignment marks printed on a continuous packaging material supplied in a packaging machine, wherein the alignment marks and the alignment marks are provided. A light reception amount acquisition unit that acquires the light reception amount of the light received by the optical sensor from the light reflected on the background portion, and an initial light reception amount that is the light reception amount acquired by the light reception amount acquisition unit in the initial state of the optical sensor. A comparison is made between the initial received light amount storage means to be stored, the present received light amount which is the received light amount obtained by the received light amount obtaining means during operation of the packaging machine, and the initial received light amount stored in the initial received light amount storage means. However, an optical sensor predictive maintenance device provided with a sign determination means for determining a sign that a malfunction of the optical sensor will occur, and a judgment result output means for outputting the judgment result of the sign determination means is provided. It is a solution.

According to a second aspect of the present invention, the optical sensor is an optical fiber sensor, and the sign determining means provides an optical sensor sign maintenance device for judging a sign according to a degree of functional deterioration of the optical sensor. Is the solution.

According to a third aspect of the present invention, the sign determining means determines that there is a sign that a malfunction of the optical sensor will occur when the decrease in the current received light amount with respect to the initial received light amount exceeds a predetermined range. A security device is provided to solve the above problems.

The invention according to claim 4 provides an optical sensor predictive maintenance device further comprising a current light receiving amount display means for displaying the current light receiving amount and a predetermined range setting means for setting the predetermined range, and solves the above problems. It is a thing.

A fifth aspect of the present invention is a predictive maintenance method for an optical sensor that detects alignment marks printed on a continuous packaging material supplied in a packaging machine, wherein the received light amount acquisition means is in operation of the packaging machine. To obtain the current received light amount, which is the received light amount of the light received by the optical sensor from the light reflected by the alignment mark and the background portion of the alignment mark, the sign determination means, the received light amount acquisition means The obtained current received light amount is compared with the initial received light amount of the optical sensor acquired by the received light amount measuring means in the initial state of the optical sensor to determine a sign of malfunction of the optical sensor. The output means provides an optical sensor sign maintenance method including a step of outputting the judgment result of the sign judgment means to solve the above problems.

In the optical sensor predictive maintenance device according to the invention as set forth in claim 1, before the optical sensor function for detecting the alignment mark is deteriorated to cause malfunction, the change indicating the sign is acquired and the optical sensor is detected. The effect is that the maintenance of can be achieved.

The optical sensor predictive maintenance device according to the second aspect of the present invention has the same effect as that of the first aspect of the invention.

The optical sensor predictive maintenance device according to the third aspect of the present invention has the same effect as that of the first aspect of the invention.

The optical sensor predictive maintenance device according to the invention of a fourth aspect has the same effect as the invention of the first aspect.

According to the optical sensor sign maintenance method of the invention of claim 5, before the function of the optical sensor for detecting the alignment mark is deteriorated to cause malfunction, the change indicating the sign is acquired and the optical sensor is detected. The effect is that the maintenance of can be achieved.

It is a block diagram which shows the structure of the optical sensor predictive maintenance system provided with the optical sensor predictive maintenance apparatus of this invention. It is a top view of packaging material Fi in which an example of a register mark as a mark for alignment was printed. It is explanatory drawing explaining the light reception amount of 10 of the optical sensor with respect to the packaging material Fi in which the register mark R1, R2, Rn, and the background part BG were printed, and the detection signal which the control part 14 outputs. It is explanatory drawing explaining the change of a light reception curve, when the optical sensor 10 detects register mark R1, R2, Rn. It is a front view and a top view of the horizontal pillow packaging machine main body 30 to which the optical sensor indicator maintenance system 1 is attached. 7 is a flowchart showing an operation of the optical sensor predictive maintenance device 20.

[Configuration of optical sensor predictive maintenance system and predictive maintenance device]
FIG. 1 is a block diagram showing the configuration of an optical sensor predictive maintenance system including the optical sensor predictive maintenance device of the present invention.
In the figure, 1 is an optical sensor predictive maintenance system, 10 is an optical sensor, 11 is an optical sensor main body, 12 is a light receiving element, 13 is a light projecting element, 14 is a control unit, 15 is a fiber cable, 15a is an optical fiber for receiving light, 15b is an optical fiber for projecting light, 16 is a fiber head, 20 is an optical sensor predictive maintenance device, 21 is a received light amount acquisition unit, 21a is a transmission unit, 21b is a reception unit, 21c is a communication line, 22 is an arithmetic and control unit, Reference numeral 22a is a sign determination unit, 22b is an initial received light amount storage unit, 23 is an alarm device, and Fi is a packaging material (film).
As shown in FIG. 1, an optical sensor predictive maintenance system 1 includes an optical sensor 10 and an optical sensor predictive maintenance device 20.
The optical sensor 10 includes an optical sensor main body 11, a fiber cable 15 and a fiber head 16, and the optical sensor main body 11 includes a light receiving element 12, a light projecting element 13 and a control unit 14.
The light receiving element 12 receives the light entering from the light receiving optical fiber 15a of the fiber cable 15, converts it into an electric signal, and outputs it.
The light projecting element 13 is an LED, emits light, and projects the light from the light projecting optical fiber 15b of the fiber cable 15.
The control unit 14 outputs a detection signal for detecting the register mark printed on the packaging material Fi based on the output signal output by the light receiving element 12 to control the light emission of the light projecting element 13 and at the same time the optical sensor main body 11 Control the overall behavior of.
The fiber cable 15 includes a light receiving optical fiber 15a and a light projecting optical fiber 15b. The light receiving optical fiber 15a guides light entering the fiber head 16 to a light receiving element, and the light projecting optical fiber 15b projects light. The light emitted by the element 13 is guided to the fiber head 16.
The fiber head 16 is installed close to the packaging material Fi, and projects the light guided to the light projecting optical fiber 15b from its tip portion to the register mark (described later) of the packaging material Fi and its background portion. The reflected light is received by the tip of the light-receiving optical fiber 15a.

The optical sensor predictive maintenance device 20 is composed of a computer device such as a control computer for controlling the operation of the packaging machine, a computer of an operation panel, and the like, and includes a received light amount acquisition unit 21, a calculation control device 22, and an alarm device 23.
The light receiving amount acquisition unit 21 includes a transmitting unit 21a, a receiving unit 21b, and a communication line 21c, and is a light receiving amount that is the amount of light received by the light receiving element 12 (hereinafter appropriately referred to as "light receiving amount of the optical sensor 10") (numerical value). ) Is acquired from the control unit 14.
That is, in the light reception amount acquisition unit 21, the transmission unit 21a continuously acquires the light reception amount of the optical sensor 10 from the control unit 14, transmits the light reception amount to the reception unit 21b via the communication line 21c, and the reception unit 15b transmits the light reception amount. The received light reception amount is sent to the arithmetic and control unit 22.
The light receiving amount acquisition unit 21 takes out the light receiving amount of the optical sensor 10 from the control unit 14 as an analog signal and calculates it via a transmission line or the like, instead of the one including the transmitting unit 21a, the receiving unit 21b, and the communication line 21c. It may be configured to be sent to the control device 22.
The arithmetic and control unit 22 includes a sign determination unit 22a and an initial received light amount storage unit 22b, and controls the operation of the receiving unit 21 and the operation of the alarm device 23.
The initial received light amount storage unit 22b stores the received light amount of the optical sensor 10 in the initial state acquired by the arithmetic and control unit 22 from the received light amount acquisition unit 21 as the initial received light amount.
During the operation of the packaging machine (which will be described later), the sign determination unit 22a stores the current received light amount, which is the received light amount of the optical sensor 10 acquired by the received light amount acquisition unit 21, and the initial received light amount storage unit 22b. The received light amounts are compared, and if the decrease in the current received light amount with respect to the initial received light amount exceeds a predetermined range, it is determined that the optical sensor 10 has a sign of malfunction.
The alarm device 23 is composed of the display such as the control computer and the operation panel, and displays an alarm indicating that the optical sensor 10 has a sign of malfunction based on the judgment result of the sign judgment unit 22a.
Further, in the optical sensor predictive maintenance device 20, a current light receiving amount display unit (not shown) that displays the current light receiving amount acquired by the light receiving amount acquiring unit 21 on a display such as the control computer or the operation panel, and the predetermined range are displayed. A predetermined range setting unit (not shown) for setting may be provided so that the predetermined range can be set by the predetermined range setting unit from the current light receiving amount displayed on the current light receiving amount display unit.

[Alignment mark]
FIG. 2 is a plan view of a packaging material Fi on which an example of a register mark as a positioning mark is printed, in which R1, R2, and Rn are register marks and BG is a background portion.
As shown in FIG. 2, the background portion BG is printed in a strip shape at one end of the continuous packaging material Fi, and the register marks R1, R2,... Rn are continuously provided at a constant interval L in the background portion BG. , And the packaging material Fi moves from left to right.
The background portion BG is generally printed in white or whitish color, and in the figure, is printed in whitish gray.
The register marks R1, R2, Rn are generally printed in black or a dark color in a slit shape, and are black in the drawing.
The alignment mark and the background portion printed on the packaging material Fi may have a difference in the amount of light received by the optical sensor 10 with respect to the reflected light. The alignment mark may be white or whitish and the background portion may be black or darkish. It may be color.

[Amount of light received by the optical sensor 10]
FIG. 3 is an explanatory diagram illustrating the amount of light received by the photosensor 10 with respect to the packaging material Fi on which the register marks R1, R2, Rn and the background portion BG are printed and the detection signal output by the control unit 14 (FIG. FIG. 6A shows the relationship between the amount of light received by the optical sensor 10 and the elapsed time, and FIG. 9B shows the relationship between the detection signal and the detection signal. In the figure, LR is a received light amount curve, S1, S2 and Sn are detection signals, SH is a threshold value, and t is an elapsed time.
The maximum value of the amount of light received by the optical sensor 10 from the light reflected on the background portion BG (the amount of light received by the optical sensor 10 in the initial state) is set to 100, and 10 of the light sensor actually reflected by the background portion BG is used. The received light amount HI of the optical sensor is 10 and the received light amount LO of 10 of the optical sensor from the light reflected by the register marks R1, R2, and Rn.
Now, the packaging material Fi moves, the optical sensor 10 receives the reflected light from the end of the packaging material Fi, and the register marks R1, R2, and Rn are 10 fibers of the optical sensor at the elapsed times t1, t2, and tn. Assuming that the light beam passes under the head 17, the light receiving amount of the light sensor 10 is LO while the light sensor 10 receives the reflected light from the register marks R1, R2, and Rn. Receives the reflected light from the background portion BG, and the amount of light received by the optical sensor 10 becomes HI.
As a result, the temporal change in the amount of light received by the optical sensor 10 is represented by the light receiving curve LR shown in FIG.
At this time, the threshold value SH for the detection signal is set in the control unit 14 of the optical sensor 10, and the control unit 14 detects when the light receiving amount of the optical sensor 10 changes from a state higher than the threshold value SH to a lower state. A signal is output, and the output detection signal is sent to a control device of a feed roller (described later) that pays out and sends the packaging material Fi, and the feeding amount of the packaging material Fi is adjusted.
If the threshold value SH is set to 60 as shown in FIG. 3A, the received light amount HI of the optical sensor 10 is higher than the threshold value SH and the received light amount LO is lower than the threshold value SH. ), the control unit 14 outputs the detection signals S1, S2, Sn at the elapsed times t1, t2, tn.

FIG. 4 is an explanatory diagram for explaining the change in the light receiving curve when the optical sensor 10 detects the register marks R1, R2, and Rn. FIG. 4A is a light receiving curve of the optical sensor 10 in the initial state. FIG. 6B shows a light receiving curve when the light receiving amount of the optical sensor 10 is slightly reduced, and FIG. 11C is a light receiving curve when the light receiving amount of the optical sensor 10 is greatly reduced. ing.
As shown in FIG. 4A, in the initial state of the optical sensor 10, the light receiving amount of the optical sensor 10 receiving the reflected light from the background portion BG of the packaging material Fi is set to 100, and the light from the register mark R1 or the like is set. Assuming that the light receiving amount of 10 of the optical sensor that receives the reflected light is 40, the light receiving curve of 10 of the optical sensor is the curve LR0.
As shown in FIG. 4B, when the light receiving amount of the optical sensor 10 decreases from the initial state and the light receiving curve is a curve LR1, the light receiving amount of the optical sensor 10 receiving the reflected light from the background portion BG is reduced. The amount of received light is higher than the threshold value SH (60), and the optical sensor 10 detects the register mark R1 and the like and is operating normally.
However, as shown in FIG. 4C, when the amount of light received by the optical sensor 10 is greatly reduced from the initial state and the light reception curve is the curve LR2, the optical sensor that receives the reflected light from the background portion BG. The light receiving amount of 10 becomes lower than the threshold value SH (60), the optical sensor 10 cannot detect the register mark R1 and the like, and does not operate normally.
In the optical sensor predictive maintenance device 20 of the present invention, the amount of light received by the optical sensor 10 has dropped from the initial state, but in the state where it is operating normally by detecting the register mark (the state of FIG. 4B). The sign of the state where the function of the optical sensor 10 is deteriorated to cause the malfunction (the state of FIG. 4C) is shown.

[Horizontal pillow packaging machine]
5A and 5B are diagrams showing a schematic configuration of a horizontal pillow packaging machine to which the optical sensor predictive maintenance system 1 shown in FIG. 1 is attached. FIG. 5A is a front view and FIG. 5B is a plan view. ..
In the figure, 30 is a horizontal pillow packaging machine, 31 is a packaging material (packaging material) supply section, 32 is a packaging material feeding section, 32a is a drive roller, 32b is a holding roller, 33 is a packaged article supply section, and 33a is a supply conveyor. , 34 is a cylinder making part, 34a is a cylinder making machine (former), 35 is a paper drawing part, 35a is a drive roller, 35b is a pressing roller, 36 is a center seal part, 36a and 36b are center seal blocks, and 37 is a basis weight part. , 37a and 37b are basis weight rollers, 38 is an end seal/cutting section, 38a and 38b are end seal blocks, 39 is a package discharge section, 39a is a discharge conveyor, CP is a product to be packaged, gra, grb and grc are guide rollers. , MR is a winding packaging material, Pc is a packaging body, TF is a tubular packaging material, cs is a center seal portion, and es is an end seal portion.
As shown in FIG. 5, the horizontal pillow packaging machine 30 includes a packaging material (packaging material) supply unit 31, a packaging material feeding unit 32, a packaged product supply unit 33, a tube making unit 34, a paper drawing unit 35, and a center seal unit. 36, a unit weight 37, an end seal/cutting unit 38, a package discharge unit 39, and the like.
The packaging material supply unit 31 includes a winding packaging material supply device (not shown) that delivers the winding packaging material MR, and delivers the packaging material Fi from the winding packaging material MR.
The packaging material feeding unit 32 sandwiches the packaging material Fi between the driving roller 32a and the pressing roller 32b, and rotates the driving roller 32a by a motor (not shown) to feed the packaging material Fi by a certain length.
The tube-making unit 33 forms (tube-making) the packaging material Fi into a tubular packaging material TF by a tube-making device (former) 34a.
The article-to-be-packaged supply unit 34 places the article-to-be-packaged CP on the belt conveyor 34a and fills the tubular packaging material TF with the article-to-be-packaged CP.
The paper pulling unit 35 sandwiches the overlapped end portion of the tubular packaging material TF between the drive roller 35a and the pressing roller 35b, and rotates the drive roller 35a by a motor (not shown) to load the tubular packaging material TF. Send out only a certain length.
The center seal part 36 sandwiches the ends of the tubular packaging materials TF superposed by the center seal blocks 36a and 36b heated by a heater (not shown), and applies the center seal cs to the tubular packaging material TF.
The weight unit 37 holds the center seal cs of the tubular packaging material TF between the weight rollers 37a and 37b and rotates one weight roller 37a by a motor (not shown) to apply the weight to the center seal cs.
The end seal/cutting portion 38 forms an end seal portion es by sandwiching the end portion of the tubular packaging material TF with end seal blocks 38a and 38b heated by a heater (not shown) to form an end seal portion es. The central portion of the portion es is cut to generate the package Pc in which the product CP is packed.
The package discharge unit 39 discharges the package Pc by the discharge conveyor 39a.
Here, the fiber head 16 of the optical sensor 10 is installed in the vicinity of the packaging material Fi passing between the drive roller 32a and the guide roller grb, detects the register marks R1, R2, Rn, and the detection signal from the control unit 14. Is output.
Then, the detection signal output from the control unit 14 is sent to the control unit such as the packaging material feeding unit 32 and the paper drawing unit 35, and the feeding amount of the packaging material Fi or the tubular packaging material TF is adjusted.

[Operation of the optical sensor predictive maintenance device 20]
FIG. 6 is a flowchart showing the operation of the optical sensor predictive maintenance device 20, and the operation of the optical sensor predictive maintenance device 20 will be described below.
First, the horizontal pillow packaging machine 30 is operated, the optical sensor 10 detects the register mark printed on the packaging material Fi and outputs a detection signal, and in the normal operation state, the received light amount acquisition unit 21 The light reception amount (current light reception amount) of the optical sensor 10 is acquired from the control unit 14, and the acquired light reception amount (current light reception amount) is sent to the arithmetic and control unit 22 (S1).
Specifically, in the light reception amount acquisition unit 21, the transmission unit 21a continuously acquires the light reception amount (current light reception amount) of the optical sensor 10 from the control unit 14, and the reception unit 21b receives the light reception amount via the communication line 21c. The light reception amount (current light reception amount) that is transmitted and received by the reception unit 15b is sent to the arithmetic and control unit 22.
Further, the current received light amount that the received light amount acquisition unit 21 acquires and sends to the arithmetic and control unit 22 is represented by a curve LR1 in FIG. 4B, for example.
Next, the sign determination unit 22a of the arithmetic and control unit 22 compares the received light amount (current received light amount) of the optical sensor 10 acquired by the received light amount acquisition unit 21 with the initial received light amount stored in the initial received light amount storage unit 22b. Then, it is determined whether or not the decrease in the current received light amount with respect to the initial received light amount exceeds a predetermined range (S2). If it is determined that the decrease is present, it is determined that the optical sensor 10 has a sign of malfunction (S3). ), this determination result is sent to the alarm device 27, and an alarm indicating that there is a sign of malfunction is displayed on the alarm device 23 (S4), and the process ends.
On the other hand, in step S2, when the sign determination unit 22a determines that the decrease in the current received light amount with respect to the initial received light amount does not exceed the predetermined range, the optical sensor 10 determines that there is no sign of malfunction (S5), and issues an alarm. The process is terminated without displaying the warning on the container 23.
In this case, 20% of the difference between the initial light receiving amount and the threshold value SH is a specific example of the predetermined range in the determination in step S2.
That is, when the difference between the current received light amount and the threshold value SH is 20% or less of the difference between the initial received light amount and the threshold value SH, the sign determination unit 22a causes the decrease in the current received light amount with respect to the initial received light amount to exceed the predetermined range. Determine that
Further, the determination that there is a sign of malfunction in the optical sensor 10 in step S3 may be performed stepwise.
Specifically, when the difference between the current received light amount and the threshold value SH is 30% or less of the difference between the initial received light amount and the threshold value SH, it is determined that there is a sign of a level 1 malfunction, and the current received light amount is When the difference between the threshold SH and the threshold SH is 20% or less of the difference between the initial received light amount and the threshold SH, it is determined that there is a sign of a level 2 operation failure, and the difference between the current received light amount and the threshold SH is the initial value. When the difference between the amount of received light and the threshold value SH is 10% or less, it may be determined that there is a sign of a level 3 malfunction.
Further, the current received light amount display unit displays the current received light amount as represented by the curve LR1 in FIG. 4B, and the predetermined range setting unit causes the sign determination unit 22a to indicate that the optical sensor 10 is malfunctioning. You may make it set the predetermined range used as the reference|standard which determines.
Even when the optical sensor 10 is operating normally in this way, the amount of light received by the optical sensor 10 decreases when the function of the optical sensor 10 begins to deteriorate. If the predetermined range is exceeded, it can be determined that the optical sensor 10 has a sign of malfunction, and the optical sensor 10 can be maintained.

An optical sensor predictive maintenance device and an optical sensor predictive maintenance method for a drive device according to the present invention are provided in a packaging machine, in which the function of the optical sensor for detecting the alignment mark is deteriorated to cause a malfunction before the malfunction occurs. Therefore, the optical sensor can be maintained and can be used for a horizontal pillow packaging machine, a vertical pillow packaging machine, an overwrapping packaging machine, a deep-drawing packaging machine, and the like.

1 Optical Sensor Predictive Maintenance System 10 Optical Sensor 11 Optical Sensor Main Body 12 Light Receiving Element 13 Projecting Element 14 Control Unit 15 Fiber Cable 15a Receiving Optical Fiber 15b Projecting Optical Fiber 16 Fiber Head 20 Optical Sensor Predictive Maintenance Device 21 Receiving Amount Acquisition unit 21a Transmission unit 21b Reception unit 21c Communication line 22 Arithmetic control device 22a Sign determination unit 22b Initial received light amount storage unit 23 Warning device 30 Horizontal pillow packaging machine 31 Packaging material (packaging material) supply unit 32 Packaging material feeding unit 32a Driving roller 32b Pressing roller 33 Packaged product supply unit 33a Supply conveyor 34 Cylinder manufacturing unit 34a Cylinder manufacturing machine (former)
35 Paper Pulling Section 35a Drive Roller 35b Pressing Roller 36 Center Sealing Sections 36a, 36b Center Sealing Block 37 Weighting Sections 37a, 37b Weighting Roller 38 is End Seal/Cutting Sections 38a, 38b End Sealing Block 39 Package Discharging Section 39a Discharging Conveyor Fi Packaging materials R1, R2, Rn Register mark BG Background portion LR Light receiving amount curves S1, S2, Sn Detection signal SH Threshold

Claims (5)

A predictive maintenance device of an optical sensor for detecting alignment marks printed on a continuous packaging material supplied in a packaging machine,
A received light amount acquisition means for acquiring the received light amount of the light received by the optical sensor from the light reflected by the alignment mark and the background portion of the alignment mark;
Initial light receiving amount storage means for storing an initial light receiving amount which is the light receiving amount acquired by the light receiving amount acquiring means in the initial state of the optical sensor,
While the packaging machine is in operation, the current received light amount, which is the received light amount acquired by the received light amount acquisition means, is compared with the initial received light amount stored in the initial received light amount storage means, and the optical sensor has a malfunction. A sign determination means for determining a sign to occur,
An optical sensor predictive maintenance device, comprising: a judgment result output means for outputting a judgment result of the sign judgment means. 2. The optical sensor sign maintenance device according to claim 1, wherein the optical sensor is an optical fiber sensor, and the sign determining means determines a sign according to a degree of deterioration of the function of the optical sensor. The sign predicting means determines that there is a sign that a malfunction of the optical sensor will occur when a decrease in the current received light amount with respect to the initial received light amount exceeds a predetermined range. Item 2. The optical sensor predictive maintenance device according to item 2. 4. The optical sensor predictive maintenance device according to claim 3, further comprising a current light receiving amount display means for displaying the current light receiving amount and a predetermined range setting means for setting the predetermined range. A predictive maintenance method of an optical sensor for detecting an alignment mark printed on a continuous packaging material supplied in a packaging machine,
The received light amount acquisition means acquires the received light amount of the light received by the optical sensor from the light reflected on the alignment mark and the background portion of the alignment mark during the operation of the packaging machine,
The sign determination means compares the current received light amount, which is the received light amount acquired by the received light amount acquisition means, with the initial received light amount of the optical sensor acquired by the received light amount measuring means in the initial state of the optical sensor, To determine the sign of the malfunction of the optical sensor,
An optical sensor predictive maintenance method, characterized in that the judgment result output means includes a step of outputting the judgment result of the sign judgment means.

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