JP2841215B2 - Packaging method and equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a packaging method and apparatus for sequentially packaging various packages such as catalogs and foods using a continuous packaging medium such as a plastic film or paper.

2. Description of the Related Art Conventionally, as described in Japanese Utility Model Publication No. Sho 62-33681, a continuous packaging medium is continuously fed out from an unwinding spool or the like in order to pack a package at the same time as the production of the package. A packaging method has been proposed in which the packaging material is continuously supplied and the package is sequentially packaged with a packaging medium.

[Problems to be Solved by the Invention] By the way, in the related art, in the final stage of unwinding the packaging medium in which the packaging medium is formed on an unwinding spool or the like,
Since complete bag making becomes difficult due to insufficient tension of the packaging medium, etc., the normal packaging operation using the packaging medium is terminated by stopping the packaging unit such as the sealing device and the cutting device. For this reason, the package that was being packaged in the packaging section becomes a defective packaged product or an unpackaged product.

Therefore, before replenishing the packaging medium and restarting the operation,
The operator needs to perform a complicated operation of collecting the defective packaged product or the unpackaged product from the packaging unit or returning the collected product to the package supply unit. This is unreasonable because it reduces work efficiency, damages the product, and impairs the productivity of the packaging line.

SUMMARY OF THE INVENTION It is an object of the present invention to prevent a defective product or an unpackaged product from occurring at the end of a normal packaging operation using the packaging medium at the final stage of feeding the packaging medium, and to improve the productivity of the packaging line.

[Means for Solving the Problems] According to the present invention as set forth in claim 1, the continuous package is continuously fed out, the package is continuously supplied to the packaging medium, and the package is sequentially applied to the packaging medium. In the final stage of feeding the packaging medium and at the final stage, the packaging medium ends the normal packaging operation. In the packaging method, an end notice mark provided before the end of the packaging medium is detected, and based on this detection signal, Predicting the arrival of the final stage of feeding of the packaging medium, and stopping the supply of the package to the packaging medium after the timing of stopping the supply of the package, which is determined before the final stage of feeding, comes to an end. At the stage, after all the packages supplied before the package supply stop timing are packaged by the packaging medium and discharged,
The wrapping operation using the wrapping medium is terminated.

The present invention according to claim 2 is a packaging unit having a continuous packaging medium feeding device, a sealing device, and a cutting device,
A packaging supply unit for continuously supplying the packaging to the packaging unit, and in the final stage of the delivery where the end of the packaging medium is completed from the delivery device of the packaging unit, the normal operation of the packaging unit is performed. In a packaging device that finishes the packaging operation, a mark sensor that is disposed on the feeding path of the packaging medium and detects an end notice mark provided before the end of the packaging medium, and a mark sensor for the packaging medium based on a detection result of the mark sensor. Predicting the arrival of the final stage of feeding, the remaining amount of the packaging medium fed from the feeding device until the final stage of feeding is reached,
At a package supply stop timing that substantially matches a specific length that is equal to or longer than the package movement path length from the package supply unit to the cut device exit side of the package unit, the supply operation of the package by the package supply unit is performed. In the final stage of feeding, in the final stage of feeding, after all the packages supplied from the package supply unit before the package supply stop timing are packed and discharged by the packaging medium in the packaging unit, the packaging unit is stopped. And a control unit for ending the packaging operation by the packaging medium.

According to the third aspect of the present invention, the continuous wrapping medium is continuously fed, the package is continuously supplied to the wrapping medium, the wrapping is sequentially packaged with the wrapping medium, and the wrapping medium is fed. In the final stage, in a packaging method for terminating a normal packaging operation with the packaging medium, an end notice mark provided before the end of the packaging medium is detected, and based on this detection signal, the arrival of the final stage of feeding the packaging medium is reached. The supply of the package to the packaging medium is stopped after the package supply stop timing determined before the final delivery stage arrives, and the package supply stop timing is determined in the final delivery stage. After all previously supplied packages have been packaged by the packaging medium and discharged,
The wrapping operation by the wrapping medium is terminated, and the empty bag produced by stopping the supply of the wrapped product is discharged out of the system.

The present invention according to claim 4, a continuous packaging medium feeding device, a sealing device, and a packaging unit having a cutting device,
A packaging supply unit for continuously supplying the packaging to the packaging unit, and in the final stage of the delivery where the end of the packaging medium is completed from the delivery device of the packaging unit, the normal operation of the packaging unit is performed. In a packaging device that finishes the packaging operation, a mark sensor that is disposed on the feeding path of the packaging medium and detects an end notice mark provided before the end of the packaging medium, and a mark sensor for the packaging medium based on a detection result of the mark sensor. Predicting the arrival of the final stage of feeding, the remaining amount of the packaging medium fed from the feeding device until the final stage of feeding is reached,
At a package supply stop timing that substantially matches a specific length that is equal to or longer than the package movement path length from the package supply unit to the cut device exit side of the package unit, the supply operation of the package by the package supply unit is performed. In the final stage of the feeding, after all the packages supplied from the package supply unit before the above-described package supply stop timing are packaged and discharged by the packaging medium in the packaging unit, the package is stopped. A control unit for ending the packaging operation by the packaging medium, and further comprising a discharge device disposed downstream of the cutting device and discharging an empty bag produced by stopping the supply of the package to the outside of the system. It is a thing.

According to the present invention, when the end notice mark provided in front of the end of the packaging medium is detected, the final stage of feeding of the packaging medium is predicted, and the final stage of feeding comes. The supply of the package to the packaging medium is stopped at the package supply stop timing determined before the start of the package. Then, after the above-described timing of stopping the supply of the packaging medium, when the final delivery stage is reached when the remaining amount of the supply from the supply device is exhausted, it is difficult to completely form the bag due to insufficient tension of the packaging medium and the like. The normal wrapping operation by the wrapping medium is completed by stopping the wrapping unit such as the cutting device and the like.

However, the package supplied before the timing of stopping the supply of the packaging medium is discharged from the packaging unit as a completely packaged product until a normal packaging operation is completed in the final stage of feeding the packaging medium. Therefore, in the final stage of the feeding of the packaging medium, the packaged product still does not remain in the packaging portion, and no defective packaging product or unpackaged product is generated in the packaging portion. For this reason, it is not necessary to collect defective packaging products or unpackaged products from the packaging section or return the collected products to the package supply section before resuming operation after supplying the packaging medium, thereby improving work efficiency. The productivity of the packaging line can be improved without fear of damaging the product.

In the present invention as set forth in claims 1 and 2, after the timing of stopping the supply of the package, the supply of the package is completed while the packaging medium is still being fed to the packaging section until the final stage of feeding the packaging medium arrives. If so, the packaging medium will produce an empty bag. At this time, claim 3,
According to the present invention described in Item 4, the empty bags are efficiently discharged out of the system, and the productivity of the packaging line is improved.

[Example 1] Fig. 1 is a schematic diagram showing a packaging device according to an embodiment of the present invention, Fig. 2 is a schematic diagram showing an example of an empty bag discharging device, and Fig. 3 is a schematic diagram showing a packaging medium. FIG. 4 is a schematic view showing a packaged product.

As shown in FIG. 1, a packaging device 10 includes a packaging unit 12 for producing a cylindrical package from a packaging medium 11 such as a continuous packaging film coated with an internal heat adhesive, and
A packaged product 15 as shown in FIG. 4 is manufactured.

The packaging unit 12 includes a packaging medium feeding device 16, a bag making device 17, a vertical sealing device 18, and a horizontal sealing and cutting device 19.

The wrapping medium unwinding device 16 of the wrapping unit 12 continuously feeds the wrapping medium 11 unwound from the raw roll-shaped wrapping medium unwinding spool 20 to the bag making machine 17 in a state where tension is applied by the unwinding roller 21. To supply. The bag making device 17 is used in a known automatic packaging machine, and forms the packaging medium 11 into a cylindrical shape while folding both sides of the packaging medium 11 inward. The vertical sealing device 18 is installed on the downstream side of the bag making device 17,
Opposite side edges of the cylindrically formed packaging medium 11 are vertically sealed with a hot roll. Feed rollers 18A and 18B are provided before and after the vertical sealing device 18. The horizontal sealing and cutting device 19 is installed on the exit side of the vertical sealing device 18 and
While rotating at the same peripheral speed as the moving speed of the package, the package-enclosed end of the packaging medium 11 is heat-bonded with a seal fitting, and at the same time, the center of the heat-bonded portion is cut with a cutter to separate the front and rear packages. Disconnect.

The package supply unit 14 includes a package supply machine 22. The package supply device 22 sequentially sends the packages 13 to the package transport conveyor 23, and the conveyor 23 transports the packages 13 while holding the transported products 13 on their own feeding claws 24. The transport end of the transport conveyor 23 is connected to the upstream of the packaging unit 12 with respect to the bag making device 17. Thereby, the package supplied by the package supply unit 14
13 is a bag making device of the packaging section 12 from the transport end of the transport conveyor 23.
It is put into the inside of the cylindrical packaging medium 11 molded at 17,
After that, the vertical sealing device 18 of the packaging section 12, the horizontal sealing and cutting device
After passing through 19, it is sealed inside the packaging medium 11.

In the packaging device 10, an end detection sensor 30 is installed on the moving path of the packaging medium 11 in the packaging medium feeding device 16 of the packaging unit 12 and immediately downstream of the feeding roller 21. The end detection sensor 30 is turned on in contact with the wrapping medium 11 that is in a tensioned state when the wrapping medium 11 is normally fed, and loses its tension at the last stage of the feeding when the end of the wrapping medium 11 is finished feeding from the feeding roller 21. It turns off with the separation of the hanging packaging medium 11, and outputs an end detection signal.

The packaging device 10 has a control device 31. The control device 31 stops the packaging medium feeding device 16, the bag making device 17, the sealing device 18, and the horizontal sealing and cutting device 19 of the packaging unit 12 based on the end detection signal of the end detection sensor 30, and
The packaging operation by 11 is completed. This is the packaging medium 11
When the end of the feeding is completed from the feeding roller 21, the feeding roller 21 reaches the final stage of feeding.
This is because the completeness of bag making in the bag making device 17 is impaired as a result of the loss of the tension applied to the bag 11.

Further, in the packaging device 10, the end detection sensor 30 is disposed on the moving path of the packaging medium 11 in the packaging medium feeding device 16 of the packaging section 12 and immediately downstream of the feeding roller 21.
The mark detection sensor 32 is installed in line with the above. The mark detection sensor 32 detects a register mark 33 attached to each packaged product length P along the longitudinal direction of the side edge of the packaging medium 11, as shown in FIG.

The control device 31 is a register mark of the mark detection sensor 32.
33. Based on the detection result, the cutting timing of the horizontal sealing and cutting device 19 in the above-described packaging unit 12 is controlled. Specifically, since the length of the packaging medium moving path (L1) from the mark detection sensor 32 to the horizontal sealing and cutting device 19 is known, each register mark 33 attached to the packaging medium 11 is
The register mark 33 is sealed and cut as described above at the timing when the register mark 33 is reached.

Further, in the packaging medium 10, the above-described mark detection sensor 32 is also used as an end notice mark detection sensor, and provided by the mark detection sensor 32 before the end of the packaging medium 11 (distance K from the end). End notice mark
34 is detected. The length of the end notice mark 34 is longer than that of the register mark 33, and the distance K of the end notice mark 34 in front of the end of the packaging medium 11 is, for example, the distance between the package feeder 22 and the horizontal seal of the packaging unit 12. Cutting device
The specific length (L2 + α) is obtained by adding a predetermined margin length (α) to the package movement path length (L2) up to the 19 exit end, if necessary.

According to the position setting of the end notice mark 34, when the mark detection sensor 32 provided immediately near the feeding roller 21 detects the end notice mark 34 as a reference, the mark is already supplied from the package feeder 22 to the conveyor 23. Until the finished package 13 exits from the horizontal sealing and cutting device 19 of the packaging section 12 as a completely packaged product 15 through the above-described package movement path length (L2), the end of the packaging medium 11 reaches the feeding roller 21. Although it has not yet reached the above-mentioned final delivery stage, the above-mentioned final delivery stage has arrived shortly thereafter, and
12 means that the packaging operation is completed.

However, based on the detection result of the end notice mark 34 of the mark detection sensor 32, for example, the control device 31 simultaneously sets the detection timing of the end notice mark 34 to the supply stop timing of the package, and the package supply device 22 detects the end of the package 13. Stop the supply operation. At this time, the distance K that the end notice mark 34 attached to the packaging medium 11 makes before the end is as described above.
Since the length of the package movement path (L2) from the package feeder 22 to the side end of the side seal and cutting device 19 of the packaging unit 12 and the margin length (α) is set to a specific length (L2 + α), The above-described package supply stop timing determined by the end notice mark 34 is such that the remaining amount of the packaging medium delivered from the delivery roller 21 from the supply stop timing to the arrival of the final stage of the delivery of the packaging medium 11 is from the package supply device 22. This is the timing at which the length substantially coincides with the specific length (L2 + α) that is equal to or longer than the length of the package moving path (L2) up to the end of the wrapping unit 12 on the side of the lateral seal and cutting device 19.

In the packaging device 10, the final package 13 supplied from the package supply machine 22 before the package supply stop timing comes.
Is discharged from the horizontal sealing and cutting device 19 as a completely packaged product 15 until the final stage of feeding the packaging medium 11 arrives, and the packaging medium 11 corresponding to the above-mentioned margin length (α) is continuously fed out. The portion passes through a bag making device 17, a vertical sealing device 18, and a horizontal sealing and cutting device 19 to become an empty bag 15A.

The packaging device 10 includes an empty bag discharging device 35 on the downstream side of the horizontal sealing and cutting device 19 of the packaging unit 12. The empty bag discharging device 35 is driven and controlled by the control device 31, and discharges the empty bag 15A out of the system based on the detection result of the end notice mark 34 of the mark detecting sensor 32. Specifically, the length of the packaging medium movement path (L2) from the sensor 32 to the empty bag discharge device 35 and the length of the package movement path (L4) from the package supply device 22 to the empty bag discharge device 35 are known. Therefore, the control device 31
After 15A reaches the empty bag discharging device 35, the empty bag discharging device 3
5 is controlled so as to start the discharging operation.

The empty bag discharging device 35 is, for example, as shown in FIG.
A is discharged to the chute 37 by the air blow 36.

 Next, the operation of the packaging device 10 will be described.

(1) When the mark detection sensor 32 detects the end notice mark 34 of the packaging medium 11, the control device 31 predicts the arrival of the final stage of feeding the packaging medium 11 based on this detection signal. The supply of the object 13 is stopped.

(2) After the above (1), until the final stage of feeding of the packaging medium 11 arrives, all the packages 13 that have been supplied before the supply stop of the above (1) are performed. Vertical sealing device 1
8. The product is carried out as a complete packaged product 15 through the horizontal sealing and cutting device 19 and stored in a conveyor stucker.

(3) When the final stage of feeding of the packaging medium 11 arrives and the end detection sensor 30 detects that the packaging medium 11 has passed through the end,
Packing medium feeding device 16, bag making device 17, vertical sealing device 18,
The horizontal sealing and cutting device 19 stops.

The empty bag 15A manufactured before the stop of the packaging unit 12 is discharged out of the system by the empty bag discharging device 35.

(4) Empty bag 15 remaining in the system with the packaging unit 12 stopped
A and the packaging medium 11 are removed by the operator.

(5) The new packaging medium 11 is set in the packaging medium feeding device 16 of the packaging section 12 and starts operation.

(6) The package supply unit 14 also operates, and the package supply unit 22 sequentially sends the packages 13 to the package transport conveyor 23.

(7) The empty bag 15A made before the package 13 reaches the bag making device 17 of the packaging section 12 is discharged out of the system by the empty bag discharging device 35.

 Next, the operation of the above embodiment will be described.

End notice mark 34 provided just before the end of packaging medium 11
Is detected, the last stage of the feeding of the packaging medium 11 is predicted, and at the timing of stopping the supply of the package determined before the last stage of the feeding comes (in this embodiment, the same timing as the end notice mark detection), The supply of the package 13 to the packaging medium 11 is stopped. Then, after the above-described package supply stop timing has elapsed, when the last feeding stage in which the feeding remaining amount from the feeding roller 21 is exhausted is reached, it is difficult to completely form a bag due to insufficient tension of the packaging medium 11 and the like. The bag-making device 17, the vertical sealing device 18, the horizontal sealing and cutting device 19, and the like stop the packaging unit 12, so that the normal packaging operation by the packaging medium 11 ends.

However, the package 13 supplied before the timing of stopping the supply of the package is packed as a completely packaged product 15 by the time the normal packaging operation is completed in the final stage of the feeding of the packaging medium 11.
Emitted from 12. Therefore, at the final stage of feeding the packaging medium 11, the package 13 still in the packaging does not remain in the packaging section 12, and no defective packaging product or unpackaged product is generated in the packaging section 12. Therefore, prior to replenishing the packaging medium 11 and restarting the operation, it is not necessary to collect defective packaging products or unpackaged products from the packaging section 12 or return the collected products to the package supply section 14, so that work efficiency is reduced. And there is no risk of damaging the product, and the productivity of the packaging line can be improved.

Further, after the timing of stopping the supply of the packaged material, until the final stage of feeding the packaging medium 11 arrives, the packaging unit 12
When the supply of the package 13 is completed while the packaging medium 11 is still being fed out, an empty bag 15A is manufactured using the packaging medium 11. At this time, according to the above embodiment, the empty bag 15A is efficiently discharged out of the system by the empty bag discharging device 35,
The productivity of the packaging line can be improved.

In the embodiment of the present invention, the empty bag discharging device 35 is not based on the detection result of the mark detection sensor 32,
The operation may be performed based on the detection result of an empty bag detection sensor that detects the empty bag 15A, which is independent of the 32.

Further, in the embodiment of the present invention, the empty bag discharging operation as in the case of the empty bag discharging device 35 in the above embodiment need not necessarily be performed.

[Effects of the Invention] As described above, according to the present invention, in the final stage of feeding out a packaging medium, when a normal packaging operation with the packaging medium is completed, occurrence of defective products or unpackaged products is prevented, and Productivity can be improved.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a packaging device according to an embodiment of the present invention, FIG. 2 is a schematic diagram showing an example of an empty bag discharging device, FIG. 3 is a schematic diagram showing a packaging medium, and FIG. It is a schematic diagram which shows a packaged product. 10… Packing machine, 11… Packaging medium, 12… Packing unit, 13… Packaging, 14… Packaging supply unit, 15… Packaging product, 16… Packaging medium feeding device, 17… Bag device, 18 Vertical seal device, 19 Horizontal seal and cutting device, 22 Package feeder, 23 Package transport conveyor, 31 Control device, 32 Mark detection sensor, 34 … End notice mark, 35 …… Empty bag discharge device.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B65B 9/08 B65B 57/10 B65H 26/00

Claims (4)

(57) [Claims] A continuous package is continuously fed out, a package is continuously supplied to the packaging medium, and the package is sequentially packaged with the packaging medium. In the packaging method for ending the normal packaging operation with the packaging medium, an end notice mark provided before the end of the packaging medium is detected, and based on this detection signal, the arrival of the final stage of feeding the packaging medium is predicted, The supply of the package to the packaging medium is stopped after the package supply stop timing determined before the delivery final stage arrives, and in the delivery final stage, the package is supplied before the package supply stop timing. A packaging method, wherein the packaging operation by the packaging medium is terminated after all the packages are packaged and discharged by the packaging medium. 2. A dispenser comprising: a packaging unit having a continuous packaging medium feeding device, a sealing device, and a cutting device; and a package supply unit for continuously supplying packages to the packaging unit. In the final stage of feeding, in which the end of the packaging medium is fed out from the device, in a packaging device for ending the normal packaging operation of the packaging unit, the packaging device is disposed on the feeding path of the packaging medium and is located just before the end of the packaging medium. A mark sensor for detecting the provided end notice mark, and predicting the arrival of the final stage of feeding of the packaging medium based on the detection result of the mark sensor, and the remaining amount of the packaging medium fed from the feeding device until the final stage of feeding comes. At the package supply stop timing, which substantially coincides with a specific length that is equal to or longer than the length of the package movement path from the package supply unit to the cutting device exit side of the package unit. While the supply operation of the package by the supply unit is stopped, in the final stage of the feeding, all the packages supplied from the package supply unit before the timing of stopping the supply of the package are all packaged by the packaging medium in the packaging unit and discharged. And a control unit for stopping the wrapping unit and ending the wrapping operation by the wrapping medium after the wrapping. 3. A continuous wrapping medium is continuously fed, a package is continuously supplied to the wrapping medium, and the wrapping is sequentially packed with the wrapping medium. In the packaging method for ending the normal packaging operation with the packaging medium, an end notice mark provided before the end of the packaging medium is detected, and based on this detection signal, the arrival of the final stage of feeding the packaging medium is predicted, The supply of the package to the packaging medium is stopped after the package supply stop timing determined before the delivery final stage arrives, and in the delivery final stage, the package is supplied before the package supply stop timing. After all the packages are packed and discharged by the packaging medium, the packaging operation by the packaging medium is terminated, and the production of the package is stopped by stopping the supply of the packages. Packaging method is characterized in that so as to discharge the air bag out of the system. 4. A wrapping unit having a continuous wrapping medium feeding device, a sealing device, and a cutting device, and a wrapping material supply unit that continuously supplies wrapping materials to the wrapping portion, wherein the wrapping portion is fed out. In the final stage of feeding, in which the end of the packaging medium is fed out from the device, in a packaging device for ending the normal packaging operation of the packaging unit, the packaging device is disposed on the feeding path of the packaging medium and is located just before the end of the packaging medium. A mark sensor for detecting the provided end notice mark, and predicting the arrival of the final stage of feeding of the packaging medium based on the detection result of the mark sensor, and the remaining amount of the packaging medium fed from the feeding device until the final stage of feeding comes. At the package supply stop timing, which substantially coincides with a specific length that is equal to or longer than the length of the package movement path from the package supply unit to the cutting device exit side of the package unit. While the supply operation of the package by the supply unit is stopped, in the final stage of the feeding, all the packages supplied from the package supply unit before the timing of stopping the supply of the package are all packaged by the packaging medium in the packaging unit and discharged. And a control unit for stopping the package and terminating the packaging operation by the packaging medium, further comprising a control unit disposed downstream of the cutting device, wherein the empty bag manufactured by stopping the supply of the package is provided. A packaging device comprising a discharge device that discharges outside the system.