JP2000229611A - Package metering system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To maintain the high operating efficiency of a package metering system and productivity (yield) by promptly detecting the abnormal flow of contents up to a step of packaging a commodity. SOLUTION: This metering system has a packaging machine 200 which packs a cylindrically molded film F with contents M and packages the contents M, and a metering conveyor for metering a commodity M1 packaged by the packaging machine 200. In this case, the system is provided with a detecting means adapted to detect the abnormal flow of the contents M on the basis of excess or lack of a metered value found by the metering conveyor, and an alarm means for giving information about the detected results.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging weighing system.

[0002]

2. Description of the Related Art A conventional packaging weighing system will be described with reference to FIG. 1 showing an embodiment of the present invention. In FIG. 1, the contents M discharged from the combination weighing device 1
After dropping to 3, the bag is continuously packed by the bag making and packaging machine 200. The bag making and packaging machine 200 welds (seals) the upper end F1 of the content M of the film F with the end sealer 202 in a state where the content M falling from above is filled in the cylindrical film F. ) And cut the product M
1 is manufactured continuously. The manufactured product M1 is transported to the weight checker 300, and it is checked whether the weight of the content M is within a predetermined range.

[0003]

In such a packaging and weighing system, when the contents M are bulky like potato chips, a chute 20 formed in a funnel shape is used.
The contents M may interfere with each other in the portion A1 where the path 3 becomes thinner to slow down the flow, or sometimes the contents M may form a bridge and be completely clogged. In addition, since such a system is operated at a high speed, a large amount of contents M is deposited in a short time when clogging starts. It takes a lot of time and effort to remove the large amount of accumulated contents M and restart the system, so that the operating rate of the system is significantly reduced. Therefore, an object of the present invention is to quickly detect abnormalities in the flow of contents until a product is packaged, and to increase the operating rate and productivity (yield) of the packaging and weighing system.
Is to maintain.

[0004]

In order to achieve the above object, a packaging and weighing system according to the present invention comprises a packaging machine for filling contents into a film formed into a cylindrical shape and packaging the same, and a packaging machine for packaging the film. A weighing conveyor for weighing the selected goods, comprising: a detecting means for detecting an abnormality in the flow of the contents based on excess or deficiency of the weighing value measured by the weighing conveyor; And a notifying means for notifying the result. The operator can know the abnormality of the flow of the contents by the notification means, and can perform an appropriate process at an early stage.

In the present invention, the term "contents" refers to an aggregate that is weighed and packed in a bag, and the term "goods" refers to an aggregate that is packed in a bag. The “flow of contents” refers to the flow of contents until contents discharged from a hopper such as a weighing device are filled in a bag. "Information means"
For example, a liquid crystal display, a CRT display, a warning light, or the like can be used.

[0006] The "detection means" detects an abnormality in the flow such as whether or not the contents arrive at the bag to be originally stored with a delay from the tendency of the weighing value of the product to be excessive or insufficient. The term “trend of excess or deficiency” refers to information on excess or deficiency obtained for a plurality of continuous products, for example, a temporal change of excess or deficiency (a concept taking into account a temporal element of excess or deficiency). Including.

As the “trend of excess or deficiency”, for example, there is a case where a shortage of weighing values is continuously detected. In such a case, it is preferable to stop the packaging operation because the contents are often clogged halfway. As another case of the “trend of excess / deficiency”, there is a case of a back-and-forth disease, that is, a case where the excess / deficiency amount of the previously measured product and the excess / deficiency amount of the currently measured product have a complementary relationship. "Complementary relationship" means that shortage and excess amount occur in the preceding and following products, and the sum of the excess and deficiency amount of the previously weighed product and the currently weighed product is equal to zero, or , A value close to zero. Such a complementary relationship occurs in the following cases.
In other words, when the weighing / packaging speed is increased, the boundary between the set of preceding contents falling and the set of subsequent contents approaches, so that if the sealing timing of the bag is shifted, the preceding contents will be lost. This is caused by the fact that a part of the following content is mixed with the content, or that a part of the preceding content is taken into the subsequent content and packed. This tendency is more remarkable as the content is bulkier, and is caused particularly by the brake applied to the falling content at the outlet portion A1 of the chute which is the bottleneck. Therefore, it is preferable to notify that the seal timing is shifted or to adjust the seal timing. If the frequency of the anterior-posterior condition becomes higher than the predetermined frequency, a bridge of the contents may be generated eventually, and the route may be completely blocked by the contents. Is preferred. On the other hand, in the case of occurrence of anteroposterior illness, if the "excess or deficiency" exceeds a predetermined allowable range, it can be determined that the content is being closed by the bridge of the content, and the packaging operation of the packaging machine is stopped. It is preferred that

[0008]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 show a first embodiment. First, an outline of a bag making, filling and packaging system to which the present invention is applied will be described. In FIG. 1, 100 is a conveyor, 1 is a combination weighing device, 200 is a bag making and packaging machine (packing machine), 300 is a weight checker (weighing conveyor), 4
00 is a seal checker, and 700 is a box packing device.

The conveyer 100 drops the contents M of the commodity to the central portion of the dispersion feeder 2 of the combination weighing device 1. The combination weighing device 1 combines the weights of the contents M supplied into a large number of weighing hoppers (not shown) to combine the contents M into a target weight or a combination weighing value Wc close to the target weight. , Lower bag making and packaging machine 20
The content M is dropped to zero.

The bag making and packaging machine 200 is a so-called vertical pillow wrapping machine in which a sheet-like film F unwound from a film roll Fr is welded by a vertical sealer 201 to form a tube, and the contents fall from above. The material M is transferred to the cylindrical film F
The contents M in the film F are filled in
The upper end F1 is welded (sealed) by the end sealer 202 and cut, and the product M1 is continuously wrapped with a constant cycle time (for example, see Japanese Unexamined Patent Publication No. 4-128).
No. 105).

The wrapped product M1 falls downward, and is fallen down onto the receiving conveyor 302 by the forward tilting tool 301 to be conveyed. The goods M1 are conveyed from the receiving conveyor 302 to the weight checker 300.

As shown in FIG. 2, the weight checker 300 has a weight detector 305 such as a load cell for measuring the weight of the product M1, and a conveyor 310 supported by the weight detector 305. The weight checker 30 of FIG.
In the case of 0, the merchandise M1 is conveyed obliquely upward and the weight of the merchandise M1 is measured and inspected by the method described later. Product M1
Is transported from the weight checker 300 to the seal checker 400.

The seal checker 400 conveys the product M1 conveyed from the weight checker 300 while pressing the product M1 from above with the presser 401, and inspects the sealing failure of the packaging bag and the length of the product M1 during the conveyance. Sorting device 5
00 is the product M received from the seal checker 400
1 is discharged out of the system if it is defective based on the above-mentioned inspection results, and is transported downstream if it is non-defective. Product M1
Is transported to the downstream packaging device 700 via a transport device including the sorting device 500 and the alignment transport device 600. The packing device 700 packs the product M1 in the cardboard box B.

Next, the configuration of the main part in the first embodiment will be described. As shown in FIG. 2, the packaging controller 20 and the checker control unit 30 are connected to each other via an interface (not shown).
Connected to devices such as actuators and motors.
Combination controller 10 and checker control unit 30
Are connected to each other via an interface (not shown).

The packaging controller 20 controls the bag making and packaging machine 200 and outputs a packaging completion signal a to the checker control unit 30 in accordance with the discharge timing of the product M1 for each packaging of the bag making and packaging machine 200. . The combination controller 10 controls the combination weighing device 1 and sends the combination weighing value Wc to the checker control unit 30 every time the combination weighing device 1 performs combination weighing. The combination controller 10 and the packaging controller 20 are connected by an interlocking signal T, so that the weighing machine that discharges the contents and the packaging machine that receives the contents perform a cooperative operation.

The checker control unit 30 includes a microcomputer (microcomputer) 35, a weight detection circuit 306,
It has a product detection circuit 307 and a motor control circuit 309. Weight detection circuit 306 and motor control circuit 30
Reference numerals 9 are respectively connected to the microcomputer 35 via an interface (not shown). The weight detection circuit 306 is connected to the weight detector 305,
Receiving the weighing signal from.

The product detection circuit 307 includes the product detector 3
08. The product detector 308 is, for example, a photodetector, and is provided between the receiving conveyor 302 and the conveyor 310 as shown in FIG. When the product detector 308 detects the product M1, the product M1
The product detection circuit 30 of FIG.
7 outputs a commodity detection signal b to the weight detection circuit 306.
The weight detection circuit 306 outputs a weight signal c obtained by removing a vibration component from the weighing signal to the microcomputer 35 at a predetermined timing based on the commodity detection signal b. The microcomputer 35 calculates the weight of the contents M of the product M1, that is, the post-weighing value Ws, as described later. The motor control circuit 309 includes:
The control of the drive motor (not shown) of the conveyor 310 is performed.

Next, the product M1 according to the first embodiment will be described.
The principle of detection of the flow abnormality will be described. Combined weighing value Wc by combination weighing device 1 and weight checker 300
Should essentially match each other. Therefore, when the case where the post-weighing value Ws does not match the combination weighing value Wc (excess or insufficient) is detected, it can be estimated that an abnormality has occurred in the flow of the contents M. The abnormalities in the flow include a case where clogging is occurring and a case where a back and forth disease has occurred. In the case where the back-and-forth disease occurs, continuous shortage does not occur. Therefore, as shown in FIG. 2B, when the shortage of the post-weighing value Ws is detected twice consecutively, clogging occurs due to the bridge. It can be determined that it is approaching. Therefore, when such shortage continues for a predetermined number of times or more, the packaging operation is stopped as described later.

On the other hand, as shown in FIG. 2 (c), when a back-and-forth disease occurs, that is, the excess / deficiency amount of the preceding and following products M1 (for example, the difference between the combination calculated value Wc and the post-weighing value Ws) is complemented. If they are related, it is generally considered that the seal timing is shifted. That is, the sealing operation is performed before the last content M of the set of the preceding content M reaches the bag, and the last content M is mixed into the next bag, thereby causing a back-and-forth disease. It is considered that Therefore, in this case, the sealing timing of the end sealer 202 is delayed by a predetermined time.

The microcomputer 35 comprises a CPU 31, a ROM
32 and a RAM 33. The RAM 33 has a weighing history storage unit 33a. As shown in FIG. 2B, the combination weighing value Wc and the subsequent weighing value Ws for the same product M1 are stored in the weighing history storage unit 33a in association with each other. The weighing history is stored for each product M1 for the weighing from the previous time to the nth time. CP
U31 is a measuring means 31a and a flow abnormality detecting means 31
b. The weighing means 31a includes the weight detection circuit 30.
Then, the total weight of the product M1 including the tare is calculated based on the weight signal c output from 6. The CPU 31 calculates the post-weighing value Ws by subtracting the tare of the product M1 from the total weight. The flow abnormality detection means 31b compares the post-weighing value Ws and the combined weighing value Wc for the same product M1 to determine whether the post-weighing value Ws is insufficient.

The microcomputer 35 is connected with a touch screen (notification means) 34 and an alarm means 320 via an interface (not shown). The touch screen 34 includes, for example, a liquid crystal display,
The flow abnormality is displayed according to the output from No. 1. The warning means 320 outputs a buzzer sound in response to a signal from the CPU 31 and turns on a warning light.

Next, the operation of the packaging and weighing system according to the first embodiment will be described with reference to the flowchart of FIG. When the system starts, the product detector 308 starts detecting the product M1 in step S1. When the product detector 308 detects the product M1, the process proceeds to step S2.
In step S2, based on the weight signal c, the weighing means 31a calculates the total weight of the product M1 including the tare weight, and proceeds to step S3. In step S3, the weighing unit 31a subtracts the tare of the product M1 from the total weight and calculates the post-weighing value Ws.
₁ is calculated, and the process proceeds to step S4.

[0023] In step S4, performs weight checking of the product M1 based CPU31 within rear weight value Ws _1. If the rear weighing value Ws is equal to or greater than the upper limit value or equal to or less than the lower limit value, it is determined that the product M1 is defective, and the process proceeds to step S5. On the other hand, if it is between the upper limit and the lower limit, the process returns to step S1. In step S5, the sorting device 500 discharges the weight-defective product M1 out of the system, and proceeds to step S6.

In step S6, the flow abnormality detecting means 31
b is compares with the rear weight value Ws ₁ combination calculated value Wc _1, when the rear weighing value Ws ₁ exceeds the combined calculated value Wc _1, the process proceeds to step S7 to determine that the overdose. On the other hand, if the post-weighing value Ws ₁ is smaller than the combination calculation value Wc ₁ , it is determined that it is insufficient, and the process proceeds to step S20.

In step S7, the flow abnormality detecting means 31
b is the weighing value Ws after the previous calculation for the product M1₀
And the corresponding weighing value Ws₀Calculated value Wc corresponding to₀When
Is compared. Rear weighing value Ws₀Is the combination calculation value Wc₀Yo
If it is less, it is determined that it is insufficient and step S
Proceed to 8. On the other hand, the post-weighing value Ws₀Is the combination calculation value Wc ₀
Is exceeded, it is determined that the amount is excessive, and step S1 is performed.
Go to 0.

In step S8, the flow abnormality detecting means 31
b calculates the anteroposterior symptom based on the following equation (1). The current rear weighing value Ws ₁ + the previous rear weighing value Ws ₀ ≒ the current combination calculation value Wc ₁ + the previous combination calculation value Wc ₀ (1) The flow abnormality detection means 31b satisfies the above equation (1). In this case, it is determined that a back-and-forth disease has occurred, and the process proceeds to step S9. On the other hand, if Expression (1) is not satisfied, the process proceeds to Step S10. In step S10, the CPU 31 causes the touch screen 34 to display contents such as "Is there any abnormality in the bag making and packaging machine?"

In step S9, the CPU 31 causes the touch screen 34 to display a message such as "a back and forth symptom has occurred", and at the same time delays the sealing timing of the end sealer 202 by a predetermined time, and then returns to step S1.

As described above, when an anteroposterior condition occurs,
Since the seal timing of the end sealer 202 is automatically delayed by a predetermined time, it is possible to improve the shift of the seal timing and prevent the production of the product M1 having a poor weight, thereby maintaining the high productivity of the system. .
Further, by repeating the operation from step S1 to step S9, an optimal seal timing can be obtained, so that a higher operation rate of the system can be maintained.

In step S20, the flow abnormality detecting means 3
1b is the previous post-weighing value Ws₀And combination calculation value Wc₀When
And the post-weighing value Ws₀Is the combination calculation value Wc₀To
If it exceeds, it is determined that an excessive amount has occurred, and step S8 is performed.
Proceed to. On the other hand, the post-weighing value Ws ₀Is the combination calculation value Wc₀Yo
If there is less than
Proceed to S21.

In step S21, the CPU 31 increments the coefficient counter and proceeds to step S22. In step S22, the CPU 31 determines whether or not the value of the coefficient counter has reached a predetermined value (for example, three times). If the value of the coefficient counter has reached a predetermined value, that is, If they continue, the process proceeds to step S24. On the other hand, if the value of the coefficient counter is not the predetermined number, the process proceeds to step S23. Incidentally, the coefficient counter is initialized at the start of the system, and at the same time as step S6.
Alternatively, if it is determined in step S20 that the amount is excessive, the value is cleared to zero.

In step S23, that is, when the weight shortage has occurred twice consecutively, the CPU 31 causes the touch screen 34 to display a content such as "weight shortage has occurred." In step S24, the CPU 31 displays on the touch screen 34 a message stating that "Insufficient weight has occurred three times in a row. It is likely that the chute and the bag making and packaging machine are clogged." To stop. At the same time, the CPU 31 causes the alarm means 320 to output a buzzer sound and turns on a warning lamp to notify the operator that the system has been stopped. Since the operator can know the flow abnormality from the display contents of the touch screen 34, this enables a quick recovery operation and maintains a high operation rate of the system.

In the first embodiment described above, the seal timing of the end sealer 202 is delayed by a predetermined time when a back-and-forth disease occurs, but the seal timing is adjusted according to the excess or deficiency of the product M1. You may make it. The method of adjusting the seal timing will be described with reference to FIG. First, the end sealer 202
Will be described in detail. As shown in FIG. 4, the end sealer 202 includes arms 210 and a pair of seal jaws 202a provided at the distal ends thereof and sandwiching the bag F2 in the left-right direction and heat-sealing the bag F2. The base of the arm 210 is connected to a servo motor (not shown). The left and right seal jaws 202a rotate in opposite directions in the direction of the arrow due to the rotation of the servomotor, and rotate as shown by a two-dot chain line, thereby lowering while holding the bag F2, and the upper end of the bag F2. F1 is sealed and cut by a cutter (not shown) (for example, see Japanese Patent Application Laid-Open No. 5-278729). When the packaging controller 20 receives the discharge completion signal of the contents M from the combination controller 10, the packaging controller 20 starts rotating the seal jaw 202a after the set time T seconds.

Next, a method of adjusting the seal timing will be described. In step S8 shown in FIG.
When U31 is determined to longitudinal disease is occurring, flow abnormality detector 31b combination calculated value Wc from the rear weighing Ws ₀
Subtract ₀ to calculate the excess or deficiency. The CPU 31 calculates the adjustment time t by dividing the excess / deficiency amount by the combination calculation value Wc ₀ and multiplying the result by a predetermined reference time Δt. CP
U <b> 31 adjusts the end sealer 202 by adding the adjustment time t to the set time T and delaying the operation timing of the end sealer 202 by the adjustment time t seconds.

As described above, when an anteroposterior condition occurs,
Since the sealing timing of the end sealer 202 is automatically delayed according to the excess or deficiency of the product M1, the deviation of the sealing timing can be quickly improved to prevent the production of the product M1 having a poor weight. High productivity can be maintained.

By the way, in the first embodiment, the seal timing time of the end sealer 202 is automatically delayed when an anteroposterior illness occurs (step S9 in FIG. 3). In addition, in the present system, the frequency of occurrence of anterior-posterior symptoms can be calculated, and the operator can adjust the system when the frequency becomes higher than a predetermined reference frequency. This case will be described in the following second embodiment.

FIGS. 5 to 7 show a second embodiment. As shown in FIG. 5, the RAM 33 has a reference frequency storage unit 33b and a measurement history storage unit 33c. As shown in FIG. 6, when it is determined that the patient has a back-and-forth syndrome in addition to the combination weighing value Wc and the post-weighing value Ws, the weighing history storage unit 33c stores the back-and-forth weight value after the occurrence of the excess amount. The flag “1” meaning the disease is stored in association with the flag.

The reference frequency storage section 33b stores a reference frequency. The flow abnormality detecting means 31b performs the predetermined number of times (for example, the last 100 times) in the weighing history storage unit 33c.
The frequency of occurrence of anteroposterior illness is calculated by calculating the number of occurrences of the anterior-posterior symptom and dividing by the predetermined number of times. The flow abnormality detecting means 31b reads out the reference frequency from the reference frequency storage unit 33b and compares it with the frequency of the preceding and following symptoms. Other configurations are the same as those of the first embodiment, and the same or corresponding portions are denoted by the same reference characters and detailed description thereof will not be repeated.

Next, the operation of the packaging and weighing system according to the second embodiment will be described with reference to the flowcharts of FIGS. In the operation of the first embodiment described above,
If the CPU 31 determines in step S8 shown in FIG. 3 that a back-and-forth disease has occurred, the process proceeds to step S15 shown in FIG. In step S15, "a back and forth symptom has occurred."
And the like are displayed on the touch screen 34. Since the operator can know the occurrence of the back-and-forth disease from the touch screen 34, appropriate processing can be performed at an early stage.

In the next step S16, every predetermined number of times (for example, 100 times), the frequency of anteroposterior illness is calculated based on the contents stored in the weighing history storage section 33c, and in step S17.
Proceed to. In step S17, the flow abnormality detecting means 31b
Reads the reference frequency from the reference frequency storage unit 33b and compares the reference frequency with the frequency of the preceding and following symptoms. If the frequency exceeds the reference frequency, the process proceeds to step S18. On the other hand, if the frequency is equal to or less than the reference frequency, step S in FIG.
Return to 1. In step S <b> 18, the CPU 31 causes the touch screen 34 to display the content of “frequent occurrences of the front-rear illness” together with the frequency of the front-rear illness.

As described above, when the frequency of the anteroposterior illness increases, the situation is displayed on the touch screen 34. Therefore, the operator can adjust the seal timing and the like based on the display content. By preventing the production of the underweight product M1,
High productivity of the system can be maintained.

By the way, in the case where the anteroposterior illness occurs,
If the amount of excess or deficiency of the post-weighing value Ws exceeds a predetermined allowable range, a bridge is generated and it is considered that the path of the content M is about to be blocked. This case will be described in the following third embodiment.

FIGS. 8 and 9 show a third embodiment. As shown in FIG. 8, the RAM 33 stores a measurement history storage unit 33c.
And an allowable range storage unit 33d. A predetermined allowable range is stored in the allowable range storage unit 33d. When detecting an anteroposterior illness, the flow abnormality detecting means 31b determines whether or not the subsequent weighing value Ws is within an allowable range. Other configurations are the same as those of the first embodiment, and the same or corresponding portions are denoted by the same reference characters and detailed description thereof will not be repeated.

Next, the operation of the packaging and weighing system according to the third embodiment will be described with reference to the flowcharts of FIGS. In the operation of the first embodiment described above,
When the CPU 31 determines the occurrence of anteroposterior illness in step S8 shown in FIG. 3, the process proceeds to step S30 shown in FIG. In step S30, the content indicating that the anteroposterior illness has occurred is displayed on the touch screen 34, and the process proceeds to step S31.

In step S31, the flow abnormality detecting means 3
1b reads the allowable range from the allowable range storage unit 33d, and determines whether or not the post-weighing value Ws is within the allowable range. If the post-weighing value Ws exceeds the allowable range, the process proceeds to step S32. On the other hand, if it is within the allowable range, the process returns to step S10 (FIG. 3).

In the step S32, the content of "a large excess or deficiency has occurred. It is considered that the chute or the bag making and packaging machine is clogged" is described as CP.
U31 displays on the touch screen 34 and stops the system. At the same time, the CPU 31
20 is output with a buzzer sound and a warning light is turned on to notify the operator that the system has stopped.
Since the operator can know the flow abnormality from the display contents of the touch screen 34, this enables a quick recovery operation and maintains a high operation rate of the system.

In each of the above-described embodiments, the flow abnormality detecting means 31b detects the abnormality of the flow of the contents M based on the excess or deficiency of the weighing value Ws after the measurement by the weight checker 300. It is economical because there is no need to separately provide a dedicated detector for detecting the.

In the first embodiment, when it is determined that a back-and-forth disease has occurred, the adjustment of the seal timing is repeatedly performed. However, even if the adjustment of the seal timing is performed a predetermined number of times, the back-and-forth disease occurs. In this case, it can be determined that the content M is almost clogging the path.
Therefore, a warning display may be displayed on the touch screen 34, and the alarm means 320 may output a buzzer sound or turn on a warning lamp to stop the system.

In each embodiment, the post-weighing value Ws
Is determined by subtracting the combination weighing value Wc from the combination weighing value Wc. However, in the present invention, the combination target value or the weight checker 300 is replaced with the product M1 instead of the combination weighing value Wc.
The upper / lower limit weight for inspecting the weight of the sample or the average value of the post-weighing values for the past n times may be used.

The functions of the CPU 31 may be distributed and processed by a plurality of CPUs. For example, as shown in FIG. 10, a remote controller (remote controller) 15 having a function of detecting a flow abnormality in each of the above-described embodiments is provided, and a checker control unit 30 and a packaging controller 2 are provided.
It may be connected to 0.

[0050]

As described above, according to the packaging and weighing system of the present invention, the detecting means detects an abnormality in the flow of the contents based on the tendency of the weighing value measured by the weighing conveyor to be excessive or insufficient. Since the notifying means notifies the abnormality, the operator can quickly know the abnormality in the flow of the contents and perform an appropriate process at an early stage. Therefore, a high operation rate of the system can be maintained.

If the shortage of the weighing values is continuously detected, the packaging operation is stopped, so that the contents are clogged and accumulated in a large amount on the packaging machine or on the upstream side of the packaging machine. Therefore, a high operation rate of the system can be maintained.

On the other hand, if the excess or deficiency of the previously weighed product is complementary to the excess or deficiency of the currently weighed product (when a back-and-forth symptom occurs), if this is reported, clogging occurs. It is possible to know in advance that there is a possibility. Further, by automatically adjusting the sealing timing of the bag, it is possible to prevent the production of a product having a poor weight, and thus it is possible to maintain a high operation rate of the system. Furthermore, if the sealing timing of the bag is adjusted according to the quantity of the product, the deviation of the sealing timing can be quickly improved, so that higher productivity of the system can be maintained.

Further, if the frequency of the pre- and post-illness is calculated and the frequency is higher than a predetermined reference frequency, the operator is notified of the situation, so that the operator performs appropriate processing before clogging occurs. , It is possible to maintain a higher operation rate of the system.

In the case where the amount of excess or deficiency of the product exceeds a predetermined allowable range in the case of occurrence of pre- and post-symptoms, if the packaging operation is stopped, the packaging machine or the upstream side of the packaging machine can be stopped. Therefore, it is possible to prevent the contents from being clogged and accumulated in a large amount, so that a higher operation rate of the system can be maintained.

[Brief description of the drawings]

FIG. 1 is a schematic side view showing a packaging weighing system according to a first embodiment of the present invention.

FIG. 2 is a schematic configuration diagram showing a main part of the system and a table showing contents stored in a weighing history storage unit.

FIG. 3 is a flowchart showing the operation of the system.

FIG. 4 is a schematic side view showing the operation of the end sealer.

FIG. 5 is a schematic configuration diagram illustrating a packaging weighing system according to a second embodiment of the present invention.

FIG. 6 is a table showing storage contents of a weighing history storage unit.

FIG. 7 is a flowchart showing the operation of the system.

FIG. 8 is a schematic configuration diagram illustrating a packaging weighing system according to a third embodiment of the present invention.

FIG. 9 is a flowchart showing the operation of the system.

FIG. 10 is a schematic configuration diagram showing a modification.

[Explanation of symbols]

 200: bag making and packaging machine 300: weight checker (weighing conveyor) 31b: flow abnormality detection means 34: touch screen (notification means) F: film M: contents M1: goods

Claims (6)

[Claims] 1. A packaging and weighing system comprising: a wrapping machine that fills and packages contents into a cylindrically formed film; and a weighing conveyor that weighs the goods wrapped by the wrapping machine. A packaging and weighing system, comprising: a detecting means for detecting an abnormality in the flow of the contents based on excess or deficiency of a weighing value measured by a weighing conveyor, and a notifying means for notifying the detection result. 2. The packaging weighing system according to claim 1, wherein when the shortage of the weighing values is continuously detected, the packaging operation is stopped. 3. The method according to claim 1, wherein the excess and deficiency of the previously weighed product and the excess and deficiency of the currently weighed product have a complementary relationship (hereinafter, this symptom is referred to as “back and forth syndrome”). A packaging weighing system that determines that the timing of sealing the bag is out of alignment and notifies the user of this. 4. The bag sealing timing according to claim 1, wherein if the excess / deficiency amount of the previously measured product and the excess / deficiency amount of the currently measured product have a complementary relationship, the sealing timing of the bag is adjusted based on the excess / deficiency amount. A packaging weighing system designed to work. 5. The packaging and weighing system according to claim 3, wherein the frequency of the before and after illnesses is calculated, and when the frequency becomes higher than a predetermined reference frequency, the situation is notified. 6. The packaging and weighing system according to claim 5, wherein the packaging operation is stopped when the amount of excess or deficiency of the preceding and following products exceeds a predetermined allowable range.