JP2009161228A - Bag making and packaging machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bag making and packaging machine which can reduce a cost of a film by decreasing a loss of the film on changing a film roll. <P>SOLUTION: The bag making and packaging machine includes a splicer part which is provided at a predetermined position on a conveying path of the film and cuts the film on the position and can joint the head end of another film to the end of the cut film and calculates the number of bags allowed to be made based on a bag length when the film remaining in the conveying path on the downstream side of the predetermined position is used. The machine manages the number of bags manufactured by the bag making mechanism and stops the conveying mechanism and the bag making mechanism for a while when a remaining number of bags manufactured reaches the number of bags allowed to be made and performs joining for changing a film at the splicer part and restarts operation of the conveying mechanism and the bag making mechanism after finishing the joining to manufacture bags as much as the number of bags allowed to be made using the remaining film. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a bag making and packaging machine for forming a sheet-like film (wrapping material) into a cylindrical shape, filling a packaged item such as a snack, and packaging.

  2. Description of the Related Art Conventionally, a bag making and packaging machine is known in which bags are continuously manufactured by using a sheet-like film, and the bags are filled with an object to be packaged such as food (for example, Patent Document 1). Such a bag making and packaging machine forms a continuously conveyed film into a cylindrical shape by a former and a tube, and seals the vertical edges of the cylindrical packaging material by vertical sealing means (heat sealing) And make a bag. Then, the tubular packaging material that becomes the bag is filled with the article to be packaged through the tube, and sealed across the upper part of the bag and the lower part of the succeeding bag by the horizontal sealing means below the tube, and then the center of the horizontal seal part is cut by the cutter. Cut the bag with. The bag making and packaging machine generally includes a film supply device, and the film supply device is disposed adjacent to the bag making and packaging machine body. A film roll around which the film is wound is set in the film supply device, and the film fed from the film roll is conveyed along a predetermined conveyance path and is supplied to the bag making and packaging machine.

  In such a film supply apparatus, a replacement film roll is set. Normally, when there is no film roll film being supplied, the end portion of the film roll being supplied and the replacement film roll The operation is performed by joining the film start end part.

JP 2003-104306 A

  By the way, the splicing of the films as described above is also performed at the time of product setup change in the bag making and packaging machine. In the case of setup change, a film roll corresponding to the next product to be produced is set in advance in the film supply device as a replacement film roll, and the production of the product using the film of the film roll being supplied is completed. At that time, the film roll is replaced by cutting the film of the film roll being supplied and joining the cut film end and the film front end of the film roll corresponding to the next product.

  However, in this case, the film corresponding to the previous product still remains in the transport path upstream of the seam of the film. Therefore, in order to start production of the next product, it is necessary to discharge the residual film in the transport path. Conventionally, the film transport mechanism is driven to discharge the residual film. The discharged residual film is discarded.

  The length of the residual film to be disposed of is equivalent to the length of the conveyance path, and although it depends on the size of the bag, the film for 20 to 30 bags is generally discarded without being used. For this reason, the conventional bag making and packaging machine has a problem that, when producing many kinds of small-sized products of about 100 bags, the film loss for each product increases and the film cost increases remarkably.

  The present invention has been made for the purpose of solving the above-mentioned conventional problems, and provides a bag making and packaging machine that can reduce film loss during setup change and reduce film cost. It is.

  In order to achieve the above object, the bag-making packaging machine according to the present invention employs as a solution means a transport mechanism that continuously transports a sheet-like film fed from a film roll along a predetermined transport path; A bag-making mechanism for forming a bag by forming the film conveyed by the conveyance mechanism into a cylindrical shape and applying heat sealing; and a predetermined position of the conveyance path; cutting the film at the predetermined position; A splicer unit that switches a film transported by the transport mechanism by splicing the leading end of another film to the cut film end, a bag length of a bag generated by the bag making mechanism, and a planned production number Based on the storage means for storing and the bag length, the number of bags that can be made when the residual film remaining in the transport path downstream from the predetermined position is used is calculated. And the number of bags produced by the bag making mechanism are managed, and when the remaining number of production until the planned production number reaches the bag making possible number, the transport mechanism and the The bag mechanism is temporarily stopped and a splicing process for switching the film is performed in the splicer unit. After the splicing process is finished, the operations of the transport mechanism and the bag making mechanism are resumed, and the residual film And a control means for generating as many bags as possible.

  According to the bag making and packaging machine according to the present invention, when the remaining production number of products reaches the number that can be produced by the residual film remaining in the transport path (number of bags that can be made), the film is switched. The film corresponding to the product is no longer drawn out from the film roll, and the remaining number of products are produced by the remaining film. Therefore, the film loss at the time of setup change can be reduced, and the film cost can be reduced. Furthermore, the setup change can be performed efficiently.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. In the following, a form in which the bag making and packaging machine according to the present invention is applied to a combination weighing system will be described as an example.

[Overall configuration of combination weighing system 1]
FIG. 1 is an external view showing a combination weighing system 1 in the present embodiment. As shown in FIG. 1, the combination weighing system 1 measures a product C (see FIG. 2) such as potato chips to be packaged, covers the measured product C with a film, and forms a cylinder. This is an apparatus for producing a packaged product B by sealing the film vertically and horizontally, and mainly includes a combination weighing device 2 and a bag making and packaging machine 3. The product C is weighed by a predetermined weight and stored in each hopper in the combination weighing device 2 provided above the bag making and packaging machine 3, and is discharged to a predetermined total weight by counting the number of times. The The combination weighing device 2 is arranged at the upper part of the bag making and packaging machine 3. After weighing a predetermined amount of the product C in the weighing hopper, the combination weighing device 2 is combined and discharged sequentially so as to have a predetermined total weight. The number of times is determined as a product C having a predetermined total weight. The bag making and packaging machine 3 is a device that uses a film F to bag the product C that has been discharged by a predetermined total weight as a result of the count measurement in the combination weighing device 2.

[Bag making and packaging machine 3]
As shown in FIG. 1, the bag making and packaging machine 3 mainly includes a bag making and packaging unit 5 that is a main body for bagging products C, and a film that supplies the bag making and packaging unit 5 with a film F serving as a bag. And a supply unit 6. Further, an operation unit 7 in which operation switches are arranged is provided on the front surface of the bag making and packaging unit 5, and a display such as a liquid crystal display showing an operation state at a position where an operator who operates the operation unit 7 can visually recognize it. Part 8 is arranged.

  The film supply unit 6 is a unit that supplies the film F to the forming mechanism 13 of the bag making and packaging unit 5 by continuously conveying the sheet-like film F along a predetermined conveyance path. It is provided adjacent to the bag making and packaging unit 5. Film rolls FR1 and FR2 (see FIG. 3) around which the film F is wound are set in the film supply unit 6, and the film F is fed out from either one of these film rolls FR1 and FR2.

  As shown in FIGS. 1 and 2, the bag making and packaging unit 5 includes a forming mechanism 13 for forming a film F fed in a sheet shape into a cylindrical shape, and a cylindrical film F (hereinafter referred to as a cylindrical film). F.) is pulled down, a vertical sealing mechanism 15 that vertically seals (heat seals) the overlapping portion of the tubular film F, and the tubular film F is sealed horizontally. A bag making mechanism 5a comprising a lateral seal mechanism 16 for closing the upper and lower ends of the bag is provided, and the film F supplied from the film supply unit 6 by the bag making mechanism 5a is formed into a cylindrical shape and heat sealed. It is comprised so that a bag can be produced | generated. Each mechanism constituting the bag making mechanism 5 a is supported by a support frame 12, and a casing 9 is attached around the support frame 12.

[Detailed configuration of bag making and packaging unit 5]
As shown in FIG. 2, the forming mechanism 13 has a tube 13a and a former 13b. The tube 13a is a cylindrical member, and the upper and lower ends are open. The product C weighed from the combination weighing device 2 is put into the opening at the upper end of the tube 13a. The former 13b is disposed so as to surround the tube 13a. The shape of the former 13b is such that the sheet-like film F sent from the film supply unit 6 is formed into a cylindrical shape when passing between the former 13b and the tube 13a.

  The pull-down belt mechanism 14 is a mechanism that sucks the cylindrical film F wound around the tube 13a and conveys it downward, and mainly includes a driving roller 14a and a driven roller 14b, and a belt 14c having a sucking function. . Here, illustration of a drive motor for rotating the drive roller 14a and the like is omitted.

  The vertical sealing mechanism 15 is a mechanism that heats the overlapping portion of the tubular film F wound around the tube 13a while pressing it against the tube 13a with a constant applied pressure, and seals it vertically. The vertical sealing mechanism 15 includes a heater, a heater belt that is heated by the heater and contacts an overlapping portion of the tubular film F, and the like. Although not shown, the vertical seal mechanism 15 also includes a driving device for moving the heater belt closer to or away from the tube 13a.

  The lateral seal mechanism 16 includes a pair of seal jaws 16a and 16a that incorporate a heater belt and the like, and a drive device that moves the seal jaws 16a and 16a closer to or away from the tubular film F, although not shown. Has been. The sealing jaws 16a and 16a are members formed to extend in the left-right direction, and the sealing surfaces of the sealing jaws 16a and 16a are heated by a built-in heater belt or the like. The tubular film F is heat-sealed by being sandwiched between the left and right sealing jaws 16a and 16a, and the upper portion of the bag and the lower portion of the bag following the bag are sealed at a time. In this embodiment, the horizontal sealing mechanism 16 includes a cutter (not shown), and the bag can be separated by cutting the center of the horizontal sealing portion after heat sealing.

[Detailed Configuration of Film Supply Unit 6]
As shown in FIG. 3, the film supply unit 6 is a device that supplies the film F to the bag making and packaging unit 5 disposed on the downstream side, and includes a roll attachment portion 17, a cutter 11, and an auto splicer. Section (splicer section) 20, transport mechanism 30, pinch roller (roller pair) 35, and tension roller 40 (see FIG. 6).

  As shown in FIG. 3, the roll mounting portion 17 is disposed at the lower portion of the film supply unit 6, and has two shafts (roll support portions) that rotatably support the film roll on which the long film F is wound. ) 18a and 18b, and shaft drive units (drive units) 19a and 19b (see FIG. 6). The shaft 18a has a film roll (first film roll) FR1 corresponding to a previously produced product, and the shaft 18b has a film roll (second film) corresponding to a subsequently produced product. The film roll) FR2 will be described as being supported. In this case, the first film roll FR1 and the second film roll FR2 may have different sizes.

  As shown in FIG. 3, the shaft 18 a supports the first film roll FR <b> 1 supplied before the second film roll FR <b> 2 with respect to the bag making and packaging unit 5 in a rotatable state. The shaft 18b supports the second film roll FR2 that is used after the production of the commodity using the film F of the first film roll FR1 supported by the shaft 18a is completed.

  The shaft driving units 19 a and 19 b are driving units that rotate the shafts 18 a and 18 b, respectively, and are controlled by the film supply unit control unit 300.

  In addition, on the film F, as shown in FIG. 5, in order to arrange the pattern printed on the film F at the same position of the bag to be formed, a mark R called a registration mark is equally spaced along the longitudinal direction. Is printed. For this reason, the interval between the registration marks R corresponds to the bag length. In the bag making and packaging unit 5, by detecting the registration mark R, the horizontal seal, the cutting timing for cutting the bag, and the like are adjusted. Further, in the film supply unit 6, the registration mark R is used as a mark, the film F of the first film roll FR1 is cut at the time of film replacement, and the cut film end and the film from the second film roll FR2 are cut. A seaming process for seaming the tip is performed.

  When the remaining number of products produced using the film F of the first film roll FR1 reaches a predetermined number, the auto splicer unit 20 temporarily stops the conveyance of the film F and cuts the film F being conveyed. Then, the end portion of the film remaining in the transport path and the vicinity of the front end portion of the film F of the second film roll FR2 are heat sealed and automatically joined together. Thereby, the film F of the 2nd film roll FR2 comes out following the film F of the 1st film roll FR1 used previously, and the film F can be conveyed continuously. As shown in FIGS. 3 and 4, the auto splicer unit 20 includes a cutter 11, a registration mark sensor (registration mark detection unit) 21, a front splicer unit 22, a back splicer unit 23, The stopper portion 24, the heat seal portion 25, the cylinder 26, and the support plate 28 are included.

  As shown in FIG. 3, the cutter 11 is disposed between the roll attachment portion 17 and the heat seal portion 25 included in the auto splicer portion 20. The cutter 11 cuts the film F of the first film roll FR1 and remains in the transport path when the remaining number of products produced using the film F of the first film roll FR1 reaches a predetermined number. The film is separated from the first film roll FR1.

  The registration mark sensor 21 is disposed on the most downstream side in the auto splicer unit 20 and can detect the registration mark R printed on the film F described above. Accordingly, it is possible to perform positioning by stopping the film F being supplied at a predetermined position based on the position of the registration mark R.

  As shown in FIG. 3, the front splicer unit 22 conveys the long film F fed from the first film roll FR1 supported by the shaft 18a upward via the rollers 22e and 22f. (See FIG. 4). Further, as shown in FIG. 4, the front splicer section 22 rotates the main body section 22a around the rotating shaft 22c by gripping the handle 22b and pulling it in a direction away from the back splicer section 23. be able to. Thereby, when the film is exchanged between the first film roll FR1 and the second film roll FR2, the workability when setting the film F by opening the front splicer portion 22 and the back splicer portion 23 is set. Can be improved. When the main body 22a is rotated, the protrusion 22d fixed to the main body 22a moves along the guide hole 28a formed in the support plate 28, and the lower end of the guide hole 28a is moved at a predetermined angle. The protruding portion 22d contacts the portion. Thereby, rotation of the main-body part 22a can be stopped at a predetermined rotation angle. Further, a heat seal portion 25 to be described later is disposed above the front splicer portion 22, and an end portion of the film F that is cut by the cutter 11 and remains in the conveyance path on the upper surface of the front splicer portion 22. The joining position in the vicinity and the joining position in the vicinity of the front end portion of the film F fed from the second film roll FR2 are joined together by heat sealing.

  As shown in FIG. 3, the back splicer unit 23 conveys the long film F fed from the second film roll FR2 to the upper side on the downstream side via the rollers 23e and 23f (see FIG. 4). . Similarly to the front splicer unit 22, the back splicer unit 23 grips the handle 23b and pulls it away from the front splicer unit 22 as shown in FIG. The main body 23a can be rotated as the center. Thereby, like the front splicer part 22, when changing the film between the first film roll FR1 and the second film roll FR2, the gap between the front splicer part 22 and the back splicer part 23 is opened. Workability at the time of setting the film F can be improved. When the main body 23a is rotated, the protrusion 23d fixed to the main body 23a moves along the guide hole 28b formed in the support plate 28, and the lower end of the guide hole 28b is rotated at a predetermined rotation angle. The point that the rotation of the main body portion 22a is stopped at a predetermined angle when the projecting portion 23d contacts the portion is the same as described above.

  As shown in FIG. 4, the temporary fixing portion 24 is disposed on the upper surface of the back splicer portion 23, and is sent out from the second film roll FR <b> 2 between the front splicer portion 22 and the back splicer portion 23. Is provided to temporarily fix the leading end of the film F on the upper surface of the back splicer portion 23 via the gap. And the temporary fix | stop part 24 has the rotating shaft 24a and the clip part 24b rotated centering on the rotating shaft 24a. In the present embodiment, the registration mark R portion printed on the film F is temporarily fixed so as to match the clip portion 24b.

  As shown in FIG. 4, the heat seal portion 25 is disposed on the upper surface of the front splicer portion 22, and is separated from the portion that heat-seals the heating portion 25 a, that is, from the first film roll FR <b> 1. A predetermined pressure is applied to a portion where the vicinity of the end of the remaining film F and the vicinity of the front end of the film F of the second film roll FR2 are joined. Thereby, by applying heat and pressure to the overlapping portion between the vicinity of the end portion of the residual film F and the vicinity of the front end portion of the film F fed from the second film roll FR2, the two can be easily joined together. it can. And when joining is performed in the heat seal part 25, the film F conveyed by the conveyance mechanism 30 switches from the film of the 1st film roll FR1 to the film of the 2nd film roll FR2.

  As shown in FIG. 4, the cylinder 26 is disposed on the side surface of the back splicer portion 23, and advances an insertion plate (not shown) to the upper surface of the front splicer portion 22. At this time, between the upper surface of the front splicer part 22 and the heat seal part 25, the leading end part of the film F of the second film roll FR2 and the terminal part of the residual film F remaining in the transport path are illustrated. Not inserted with the insertion plate. At this time, the residual film F and the film F of the second film roll FR2 are stopped while being positioned with respect to each other. That is, the residual film F is positioned by stopping the registration mark R at a predetermined position, and the film F of the second film roll FR2 is positioned by fixing the registration mark R to the temporary fixing portion. Thereby, on the upper surface of the front splicer portion 22, a state is formed in which the joining position in the vicinity of the front end portion of the film F of the second film roll FR2 and the joining position in the vicinity of the end portion of the residual film F are overlapped. Can do.

  The support plate 28 is a plate material for fixing the auto splicer unit 20 to the support frame 12 on the bag making and packaging unit 5 side, and as shown in FIG. Guide holes 28a and 28b for guiding the 23 protrusions 22d and 23d are formed. Thereby, the auto splicer unit 20 can be disposed immediately upstream of the bag making and packaging unit 5.

  Next, the transport mechanism 30 is for continuously transporting the film F fed out from one of the first and second film rolls FR1 and FR2 to the downstream side along a predetermined transport path, for example, As shown in FIG. 4, the rollers 30 a, 30 b, 30 c are configured. Further, a pinch roller 35 and a tension roller 40 which will be described later are also included in a part of the transport mechanism 30. The film F fed out from the first or second film rolls FR <b> 1 and FR <b> 2 is supplied to the bag making and packaging unit 5 disposed on the downstream side of the film supply unit 6 by the transport mechanism 30.

  As shown in FIG. 4, the pinch roller 35 is disposed on the downstream side of the rollers 30 a to 30 c and includes two rollers 35 a and 35 b facing each other. Among these, the first encoder (feed amount measuring unit) 36 (see FIG. 6) capable of calculating the feed amount of the film F based on the rotation of the roller 35a is attached to the roller 35a.

  As shown in FIG. 6, the tension roller 40 is disposed on the downstream side of the pinch roller 35. The tension roller 40 measures the tension applied to the film F by applying a certain tension to the film F. The tension can be kept constant by switching the rotation speed of each roller of the transport mechanism 30 to be fed. The tension roller 40 includes a first guide roller 41 and a second guide roller 42 for changing the direction, a dancer roller 43 that can move in the vertical direction, and a second encoder 51. The second encoder 51 is for detecting the vertical displacement of the dancer roller 43, and can monitor the tension applied to the film F based on the vertical displacement.

[Control mechanism and operation of bag making and packaging machine 3]
Next, the control mechanism and the operation of the bag making and packaging machine 3 configured as described above will be described. FIG. 7 is a block diagram illustrating an example of a control mechanism of the bag making and packaging machine 3. The bag making and packaging unit 5 of the bag making and packaging machine 3 is provided with an overall control unit 100 and a storage unit 130 for controlling the bag making and packaging unit 5 and the film supply unit 6 in an integrated manner. Yes. The overall control unit 100 is configured by a CPU or the like, and can store and read various control parameters in a storage unit 130 configured by a memory or the like. The bag making and packaging unit 5 is provided with a bag making and packaging unit control unit 200 separately from the overall control unit 100, and the bag making and packaging unit control unit 200 is based on a command from the overall control unit 100. It is comprised so that operation | movement control of each part of 5a may be carried out. Further, the film supply unit 6 is provided with a film supply unit control unit 300, and the film supply unit control unit 300 is based on a command from the overall control unit 100, the transport mechanism 30, the shaft drive units 19 a and 19 b, the auto splicing unit. It is configured to control the operation of each unit such as the support unit 20.

  The overall control unit 100 is connected to the operation unit 7 and the display unit 8 described above, and based on information input by the operator via the operation unit 7, the bag making and packaging unit control unit 200 and the film supply unit control unit 300. The overall operation of the bag making and packaging machine 3 is controlled in an integrated manner by outputting various commands. For example, when the production of a certain product is started in the bag making and packaging machine 3, the operator inputs the bag length L and the planned production number M via the operation unit 7. The information input here is stored in the storage unit 130 by the overall control unit 100. When the start of production is instructed via the operation unit 7, the overall control unit 100 controls the bag making and packaging unit control unit 200 and the film supply unit control unit 300 to produce products for the planned production number M. At this time, the overall control unit 100 functions as the calculation unit 110 and the control unit 120.

  The calculation means 110 reads the bag length L of the bag generated by the bag making mechanism 5a from the storage unit 130, and based on the bag length L, the downstream conveyance path from the predetermined position where the auto splicer unit 20 is provided. The number N of bags that can be made when the residual film F remaining inside is used is calculated. In the case of the present embodiment, the production that can be generated by the residual film F in the conveyance path on the downstream side from the position where the films are joined by the auto splicer section 20 (more specifically, the position of the heat seal section 25). The possible number N of bags is calculated.

  The control means 120 manages the production number of bags generated by the bag making mechanism 5a after the production is started, and when the remaining production number until reaching the planned production number M reaches the bag production possible number N, The operations of the transport mechanism 30 and the bag making mechanism 5a of the film supply unit 6 are temporarily stopped, and a splicing process for switching the film F in the auto splicer unit 20 is performed. Then, after the seaming process is completed, the operations of the transport mechanism 30 and the bag making mechanism 5a are restarted, and the remaining film F in the transport path generates bags for the number of bags that can be made, thereby finally producing the product. A number of products corresponding to the number M are produced.

  FIG. 8 is a flowchart showing an example of an operation sequence executed by the control mechanism of the bag making and packaging machine 3, and shows a sequence for bagging a certain product for the planned production number (M). First, the operator plans to produce a product to be generated using the bag length L of the bag generated by the film F of the first film roll FR1 and the film F of the first film roll FR1 prior to the start of production of the product. The number (M) is input from the operation unit 7 (step S10). The overall control unit 100 functions as the computing unit 110 after storing and storing the input bag length L and the planned production quantity M in the storage unit 130. Based on the bag length L, the possible number N of bag making is calculated (step S11). In the bag making and packaging machine 3, the length of the conveyance path downstream from the position where the auto splicer unit 20 joins the films is a known value in design. Therefore, the calculation means 110 calculates the number N of bag making possibilities by dividing the transport path length by the bag length L.

  Thereafter, when a production start instruction is given from the operator, the process proceeds from step S12 to S13, and the overall control unit 100 functions as the control means 120, and sends a command to the bag making and packaging unit control unit 200 and the film supply unit control unit 300. Then, the operation in the bag making and packaging machine 3 is started. Thereby, the film supply unit 6 starts supply and conveyance of the film F from the first film roll FR1, the bag making and packaging unit 5 forms the film 5 conveyed from the film supply unit 6 into a bag shape, and the product C After filling, the bags are sealed in a sealed state by the lateral seal mechanism 16 to produce one packaged product B one by one. The control unit 120 manages the production status of such a product B, and performs the process of step S15 each time the production of one bag (that is, one product B) is completed, and inputs it as the planned production number. The value M is subtracted by one. Therefore, the value M input as the planned production quantity is a value indicating the remaining production quantity when the production of the commodity is started. Then, the control means 120 determines whether or not the remaining production number M decremented with the production for one bag coincides with the bag-making possible number N (step S16), and the remaining production number M can be bag-made. If the number N has not been reached, the process returns to step S14 to continue production of the product.

  On the other hand, when the remaining production number M coincides with the bag-making possible number N, the control unit 120 outputs a temporary stop command to the bag making and packaging unit control unit 200 and the film supply unit control unit 300 (step S17). . Thereby, the operation of each part of the bag making mechanism 5a is stopped in the bag making and packaging unit 5, and the transport operation of the film F is stopped in the film supply unit 6. Then, the control unit 120 causes the auto splicer unit 20 of the film supply unit 6 to perform the film F splicing process. That is, the film F supplied to the bag making and packaging unit 5 is switched from the film of the first film roll FR1 to the film of the second film roll FR2. Therefore, after that, when a product is produced in the bag making and packaging machine 3, the film F corresponding to the next product is sequentially fed out from the second film roll FR2 and conveyed to the bag making and packaging unit 5.

  When the splicing process of the film F is completed in the auto splicer unit 20, a production resumption instruction is given to the control means 120. The production resumption instruction may be a signal output to the control unit 120 by the film supply unit controller 300, or may be an instruction manually input after the operator confirms the end of the joining process. . If there is such a production resumption instruction, the control unit 120 proceeds from step S19 to S20, and resumes production of the product in the bag making and packaging machine 3. Although not shown in the figure, the control means 120 is configured to decrement the value of the remaining production number M by 1 every time one bag is produced after the production is resumed in step S20. Is done.

  Then, after resuming production, the control means 120 determines whether or not the seam of the film F has reached a predetermined position (step S21). This predetermined position is, for example, a position immediately before the former 13b. As described above, the film F of the second film roll FR2 may be different in size from the film F of the first film roll FR1, and when the film size is different, the former 13b for forming the film F into a cylindrical shape is provided. It needs to be replaced. Therefore, the control means 120 determines whether or not the seam of the film F has reached an appropriate position for changing the former. Then, production is continued until the seam of the film F reaches a predetermined position. When the seam reaches the predetermined position, the process proceeds to step S22, and it is determined whether or not the former needs to be replaced.

  When the film size of the second film roll FR2 is different from the film size of the first film roll FR1 and the former 13b needs to be replaced, the process proceeds from step S22 to S23, and the control unit 120 temporarily stops the production. At the same time, the operator is urged to replace the former 13b (step S23). Then, the former is exchanged by the operator (step S24), and when a production resumption instruction is given (YES in step S25), production is started again (step S26). On the other hand, if the film size of the second film roll FR2 is the same as the film size of the first film roll FR1 and it is not necessary to replace the former 13b, the process proceeds from step S22 to S27, and production is continued as it is. The

  Then, the control means 120 determines that the production is finished when the remaining production number M becomes 0, and finishes the production of the commodity using the film F of the first film roll FR1. At this time, the film F of the second film roll FR2 corresponding to the next product to be produced is already set in the bag making mechanism 5a, and the setup change can be performed efficiently.

  In particular, in the present embodiment, when the remaining production number M of products reaches the number N that can be made, the transport mechanism 5a and the bag making mechanism 30 are temporarily stopped, and the film F is switched in the auto splicer unit 20. For this purpose. Then, after the joining process is completed, the operation of the transport mechanism 5a, the bag making mechanism 30, and the like is restarted to generate bags for the number N of bags that can be made by the residual film in the transport path. Therefore, almost all of the film F fed out from the first film roll FR1 is used for product packaging, so that the film F of the first film roll FR1 is not wasted. Therefore, film loss at the time of setup change is reduced, and the film cost can be reduced.

  As mentioned above, although one Embodiment of this invention was described, this invention is not limited to the above-mentioned content, A various modification is applicable.

  For example, in the above-described embodiment, the case where the splicer unit is configured as the auto splicer unit 20 and the film splicing process is automatically performed is illustrated, but the present invention is not limited to such a form. In other words, the splicer unit may be one that is manually joined by the operator.

  Moreover, in the said embodiment, the case where the possible number N of bag making is calculated before the production of goods is started in the bag making packaging machine 3 is illustrated (refer step S11 of FIG. 8). However, the film supply unit 6 is provided with a dancer roller 43 that can move up and down. When the dancer roller 43 is displaced in the vertical direction while the film F is being transported, the transport path depends on the position of the dancer roller 43. The length of the bag changes, and accordingly, the possible number N of bag making also changes. Therefore, in such a case, it is preferable to perform the process for calculating the possible number N of bag making every time the production for one bag is completed.

  Further, in the product production line, a seal checker, a weight checker, an X-ray foreign matter inspection device, etc. for detecting a defect of the product packaged by the film F are provided on the downstream side of the bag making and packaging machine 3 described above. There is. In this case, when a defect in the product is detected by these defect detection devices, the product is discharged as a defective product in the middle of being conveyed to the final boxing device. Also in the packaging device, when a product is sucked and held at the time of packaging work, a malfunction may occur and the product may be damaged, resulting in a defective product. When defective products are eliminated on the downstream side of the bag making and packaging machine 3 in this way, the number of products finally obtained as non-defective products is less than the planned number of production, which is insufficient. Therefore, in the case of a system configuration in which a defect detection device such as a seal checker, a weight checker, an X-ray foreign matter inspection device or a packaging device is provided on the downstream side of the bag making and packaging machine 3, the defect detection device or the packaging device is provided. Each time a defective product is discharged, a signal indicating defective discharge is fed back to the bag making and packaging machine 3, and the bag making and packaging machine 3 inputs a signal indicating defective discharge from the defect detection device or the boxing device. It is preferable that the remaining production number M is incremented according to the number of defective products. As a result, even if defective products are discharged downstream from the bag making and packaging machine 3, the bag making and packaging machine 3 increases the number of products produced by the number corresponding to the defective products. The number of products obtained can be made to match the planned production number.

It is an external view which shows an example of the combination measurement system to which the bag making packaging machine concerning this invention was applied. It is a perspective view which shows one structural example of a bag making packaging unit (especially bag making mechanism). It is a front view which shows an example of the external appearance structure of a film supply unit. It is a front view which shows one structural example of a splicer part. It is explanatory drawing which shows the registration mark of a film roll. It is a figure which shows the whole schematic structure of a film supply unit. It is a block diagram which shows an example of the control mechanism of a bag making packaging machine. It is a flowchart which shows an example of the operation | movement sequence performed by the control mechanism of a bag making packaging machine.

Explanation of symbols

DESCRIPTION OF SYMBOLS 3 Bag making packaging machine 5 Bag making packaging unit 5a Bag making mechanism 6 Film supply unit 20 Auto splicer part (splicer part)
30 Transport Mechanism 100 Overall Control Unit 110 Computing Unit 120 Control Unit 130 Storage Unit (Storage Unit)
F film

Claims (1)

A transport mechanism for continuously transporting a sheet-like film fed from a film roll along a predetermined transport path;
A bag making mechanism for forming a bag by forming a film conveyed by the conveyance mechanism into a cylindrical shape and heat-sealing;
A splicer unit that is provided at a predetermined position of the transport path, cuts the film at the predetermined position, and switches the film transported by the transport mechanism by splicing the leading end of another film to the cut film end. ,
Storage means for storing in advance the bag length and the expected production number of the bags generated by the bag making mechanism;
Based on the bag length, calculating means for calculating the number of bags that can be produced when the residual film remaining in the downstream conveyance path from the predetermined position is used;
Controls the number of bags produced by the bag making mechanism, and temporarily stops the transport mechanism and the bag making mechanism when the remaining number of production until the planned production number reaches the bag making possible number. In addition, the splicer unit performs a splicing process for switching the film, and after the splicing process is finished, restarts the operations of the transport mechanism and the bag making mechanism to allow the number of bags to be made by the residual film. Control means for generating a bag of minutes;
A bag making and packaging machine comprising:

Images