JP5268322B2 - Defect prevention device for sealing part of film material manufacturing equipment - Google Patents

Description

  The present invention relates to a film material manufacturing apparatus that continuously conveys a long film material and seals a part of the film material in the middle of the process, and prevents a sealing failure in a film material manufacturing apparatus that prevents a sealing failure. About. This seal portion defect prevention device is suitable, for example, for a device that performs a sealing process for forming a side seal part for forming a plastic bag, a sealing process for sealing a backrest part, or a sealing process for forming a gusset part. Can be used for

2. Description of the Related Art Generally, there is provided an apparatus for manufacturing a film material that is wound around a core wound by unwinding and transporting the film material into a line and performing a predetermined process, for example, a sealing process. An apparatus for sealing and transporting the film material is known from Patent Document 1, for example. Moreover, as shown in FIG. 11, when manufacturing a flat bag with a plastic bag, the manufacturing apparatus of the film material which formed the gusset fold was known. In this device, a side gusset portion is formed, and a small hole is formed in the folded portion of the side gusset portion so that the seal surfaces of a pair of body portions facing each other in a folded state can be bonded together. . Conventionally, in the manufacturing method for forming the small hole, the sheet S folded from both sides so as to wrap the guide member 61 is fed to the guide member 61 of the iron plate. A small hole is formed in the vicinity of the folded back of the sheet S by the punching device 62. After the small hole is formed, the disk member 63 is pushed in from both sides of the sheet S so that the small hole portion is located on both sides of the sheet S. The gusset part was formed by pushing in including. Therefore, the small holes are formed in the folded gusset portion, and in the subsequent sealing process, the sealing surfaces of the body portions facing each other are sealed through the small holes in the gusset portion.
JP 2004-268400 A

On the other hand, in the case of a device that transports the film material wound around the core in a continuous operation and winds up the film material that has reached a predetermined amount, the amount of the wound film material is usually the supply side film material Since the amount of the wound film material is greater than the amount of the wound film material wound up by sealing, when the wound film material reaches a predetermined amount, the apparatus is temporarily stopped, and the unwrapped film material is not wound . I had to load a new wick . Therefore, a part of the seal portion of the film material that has been subjected to the sealing process before loading a new core is a part where the heat is cooled during the time of replacing the core and the seal is released (hereinafter referred to as incomplete seal). Part). This incomplete seal portion is to be wound around a winding start portion of a new core after the core is replaced. Normally, an incomplete seal portion that has not been sealed by replacing the winding core has been cut out and disposed of a certain portion of the film material as an incomplete product. However, the unfinished seal portion may be used as it is in the subsequent bag making process, and may be treated as defective after bag making. Therefore, measures to prevent this defect have been left as a new issue.

This invention solves the above-mentioned subject, and when performing the sealing process of the film material processed continuously, it aims at providing the defect prevention apparatus of the seal part which can prevent a seal defect. That is, the defect prevention device for a seal portion according to the present invention is:
In the first aspect of the present invention, a film material feeding unit that unwinds and feeds the wound solid film material into the apparatus, and a fold portion is formed along the longitudinal direction at an intermediate portion in the width direction of the film material. A fold forming portion and a fold seal forming portion having a seal forming portion for sealing the fold portion, and a winding portion for winding the film material forming the fold portion, and the fold forming portion and the seal forming. An apparatus for preventing failure of a seal portion of a film material manufacturing apparatus provided with a line back dancer portion disposed between the film portion and configured to be able to rewind the film material fed to the winding portion. The line back dancer section includes a pair of support rollers that support the film material and a pulling roller that is disposed between the support rollers and that can move up and down by pulling the film material. of By moving the film material supported on the holding roller downward, an uncompleted seal portion of the film material that has moved forward from the seal forming portion along the flow direction of the film material and caused a seal failure The film material is rewound from the seal forming portion to the rear in the flow direction, and then the film material is fed again along the flow direction so that the incomplete seal portion of the film material can be resealed. it is characterized in that that.

Moreover, in the invention according to claim 2, the fold seal forming portion forms a pair of first fold portions arranged in parallel in the flow direction at an intermediate portion in the width direction of the solid film material. A first fold seal forming portion; and a second fold seal forming portion that forms a pair of second fold portions disposed on both outer sides of the first fold portion. The dancer portion is arranged in each of the first fold seal forming portion and the second fold seal forming portion.

In the invention according to claim 3, in each of the first fold seal forming portion and the second fold seal forming portion, along the flow direction of the film material, in front of the respective seal forming portions, A tension part for applying tension to the film material is provided.

  According to the present invention, when the film material that has been subjected to the sealing process is wound around the core by a predetermined amount, the apparatus stops its operation by operating the “stop button”. Simultaneously with the operation of the stop button, the seal portion sealed before the stop is reversed, and the seal portion of the sealed film material is rewound upstream from the seal portion of the apparatus. When a new winding core is loaded and the film material manufacturing apparatus is restarted, the sealed portion of the film material once sealed moves to the seal portion of the apparatus and is subjected to sealing again. The seal portion of the film material that has been subjected to the sealing process is wound around a core.

  As described above, in the present invention, the sealed part of the film material that has been once sealed is re-sealed during re-operation, although the heat is cooled and the seal is released by replacing the core. The material can be used as a non-defective bag-making film without forming an unsealed portion (unfinished seal portion). For this reason, quality defects are reduced and the yield is improved.

In addition, the film material manufacturing apparatus includes a film material supply unit that supplies the film material, a seal forming unit that seals a part of the film material, and a winding unit that winds up the film material that has been subjected to the sealing process. . The device is deactivated by activating the “stop button”. Simultaneously with the operation of the stop button, the first roller is raised and the second roller is lowered, whereby the sealed portion of the sealed film material is rewound upstream from the seal forming portion of the apparatus. Then, when a new core is loaded and the film material manufacturing apparatus is restarted, the sealed portion of the film material once sealed moves to the seal forming section of the apparatus and is subjected to sealing again. The seal portion of the film material that has been subjected to the sealing process is wound around a core.

  As described above, in the present invention, the sealed part of the film material that has been once sealed is re-sealed during re-operation, although the heat is cooled and the seal is released by replacing the core. The material can be used as a non-defective bag-making film without forming an unsealed portion (unfinished seal portion). For this reason, quality defects are reduced and the yield is improved.

  Moreover, when this film material is a film-making film material formed to form a plastic bag, for example, a folded portion for forming a corner portion of the bag or a folded portion for forming a gusset Since the incomplete seal portion can be sealed if the portion is continuously sealed along the flow direction, the yield can be improved without forming the incomplete seal portion.

  Next, one form of the defect prevention apparatus of the seal part of the film material manufacturing apparatus of this invention is demonstrated based on drawing. Although this seal part failure prevention device can be applied to any one that seals a continuously flowing film material, in the embodiment, in order to form a plastic bag, the four corners of the plastic bag are used. The film material manufacturing apparatus that seals will be described.

  As shown in FIG. 1, this plastic bag can be used as a packaging bag 1 capable of arranging heavy contents 3 in a standing manner. For this purpose, as shown in FIGS. 2 to 3, the film material 10 is formed with two first folds 11 and two second folds 13 along the longitudinal direction at intermediate positions in the width direction. The folding parts 11 and 13 protrude from the flat part 15 of the film material 10 to one side, and the protruding folding part 11 is brought down to the flat part 15 side to be in a polymerized state. When these four folding parts 11 and 13 are formed in the box-shaped packaging bag 1, as shown in FIG. 1, it is formed as the pillar part 5 arrange | positioned at four corners.

  As shown in FIG. 4, the apparatus 20 for manufacturing the film material 10 unwinds the solid film material F from the upstream unwinding portion and forms the folded film portion 10 into the downstream winding portion. It is configured to have a long main frame 21 until it is wound up. That is, the film material feeding unit 22 having an unwinding portion around which the solid film material F is wound, and the first folding seal forming unit 30 that forms and seals the first folding portion 11 on the solid film material F. A second fold seal forming portion 40 that forms and seals the second fold portion 13, and a winding portion 50 that winds up the first fold portion 11 and the film material 10 forming the second fold portion. , And is configured.

  The film material feeding unit 22 is configured to unwind the solid film material F wound on the reel 23 and feed it toward the first folding seal forming unit 30 while being guided by a plurality of feed rolls 24. Has been.

  The first fold seal forming portion 30 includes a first fold forming portion 31 that forms a pair of first fold portions 11 and 11 in the width direction intermediate portion of the solid film material F fed on a plane, The first seal forming portion 32 that seals the first folded portion 11 that is folded, and the first seal forming portion 32 that is disposed between the first fold forming portion 31 and the first seal forming portion 32. A line back dancer portion 33 for rewinding the film material F sealed in the step, a tension portion 34 for tensioning the film material F arranged and sealed downstream of the first seal formation portion 32, It has.

  As shown in FIG. 5, the first fold forming portion 31 is disposed on the front end side of the first base plate 311 formed in a long shape along the traveling direction and the first base plate 311. The first base plate 311 includes first folding plates 312 and 312 that are arranged so as to partially overlap the upper surfaces of both sides of the front end portion. The first base plate 311 is fixed to the main body frame portion 21, and the pair of first folding plates 312 and 312 can be moved in the width direction with respect to the first base plate 311 by the width adjusting device 313. Is arranged. As shown in FIG. 6, the solid film material F passes through the lower surface side of the first base plate 311 and travels through the upper surfaces of the pair of folding plates 312 and 312. That is, the insulative film material F is bent inward by passing between the first base plate 311 and the first folding plate 312 around the both end portions of the first base plate 311 in the intermediate portion. The first folding part 11 is formed.

  The pair of first folding plates 312 and 312 includes a first folding plate 312 in which a solid film material F passing through the lower surface side of the first base plate 311 is disposed on the front end side of the first base plate 311. In order to pass through the upper surface side, inclined surfaces 312a and 312a are formed so that an insertion space can be formed between the rear portion and the first base plate 311.

  The width adjusting device 313 can move the first folding plate 312 in the width direction of the film material F. If the width adjusting device 313 is movable in the height direction, the first folding plate 312 is moved up and down depending on the thickness of the film material F to adjust the gap with the first base plate 311. Can do.

  The first seal forming part 32 includes a preheating heater part 321 and a seal roll part 322 in order to seal the first folding part 11 on the flat part 15. The preheating heater part 321 is composed of a pair of upper and lower long plates that sandwich the first folding part 11 and performs preheating before heat sealing with the seal roll part 322.

  The seal roll part 322 is composed of a pair of upper and lower seal rolls that sandwich the film material F, and by holding the flat part 15 of the film material F and the first folding part 11 at the same time and heating them at a high temperature, One side is heat-sealed. That is, in FIG. 3, the lower surface of the film material F is formed as a surface that is coated and not thermally fused, and is formed as a surface that can be thermally fused by heating the upper surface. Therefore, the heat fusion part 16 will be formed between the 1st fold part 11 (or 2nd fold part 13) and the plane part 15 of FIG.

  In addition, the 1st folding part 11 heat-sealed is cooled with the cooling fan 35 arrange | positioned in the downstream. By forming the pair of first folding parts 11 and 11 in the solid film material F, the film material F is fed downstream as the primary processed film material F1.

The line back dancer portion 33 is disposed to rewind the film material F once sealed by the first seal forming portion 32, and is disposed on the upper surface side of the film material F as shown in FIGS. Traction rolls 331 and support rolls 332 and 332 arranged on the lower surface side of the film material F. The traction roll 331 is moved up and down by a traction drive member, for example, a pneumatic cylinder 333. The line back dancer portion 33 is operated integrally with the extending portion 34 to rewind the sealed film material F.

  The tension portion 34 is provided with a plurality of guide rolls 341 for traveling and guiding the primary processed film material F1 in order to apply tension to the sealed primary processed film material F1, and primary processing for maintaining a predetermined tension. And a swing arm 342 capable of pulling the finished film material F1. A pulling roll 343 is attached to the tip of the swing arm 342, and is actuated so as to swing in the vertical direction by detecting the bending state of the primary processed film material F1. Further, the swing arm 342 is operated integrally with the line back dancer portion 33 to perform the rewinding operation of the film material F. The line back dancer portion 33 and the extending portion 34 are electrically controlled with the first seal forming portion 32 interposed therebetween, thereby constituting a seal failure prevention device as one embodiment of the present invention.

  The second fold seal forming portion 40 is a pair of second fold portions 13 formed in parallel with the first fold portions 11 and 11 outside the pair of first fold portions 11 and 11 formed in parallel. A second fold forming portion 41 for forming the second fold forming portion 41, a second seal forming portion 42 for sealing the folded second fold portion 13, and the second fold forming portion 41 and the second seal forming portion 42. A line back dancer portion 43 for rewinding the primary processed film material F1 disposed between and sealed by the second seal forming portion 42, and disposed downstream of the second seal forming portion 42 and sealed. And a tensioning portion 44 for tensioning the primary processed film material F1.

  As shown in FIG. 9, the second fold forming portion 41 is arranged on the front side of the second base plate 411 formed in a long shape along the traveling direction and the second base plate 411. Second folding plates 412 and 412 are provided so as to partially overlap the upper surfaces of both side portions of the front end portion of the second base plate 411. The pair of second folding plates 412 and 412 are formed to have notches 412a and 412a at the front ends, respectively. Guide rolls 413 and 413 are provided in the notches 412a and 412a to guide the running so as to spread the primary processed film material F1 outward.

  On the other hand, when the primary processed film material F1 passes through the second folding formation portion 41, the primary processed film material F1 travels on the upper surface side of the second base plate 411 as shown in FIG. It travels through the lower surfaces of the pair of second folding plates 411 and 411. That is, the primary processed film material F1 passes through the upper surface of the second base plate 411 at the rear portion of the second base plate 411 and then the lower surface of the second base plate 411 at the front portion of the second base plate 411. And second folding portions 13 that are bent outwardly by passing between the upper surfaces of the second folding plate 412 and the second folding plate 412.

  The primary processed film material F <b> 1 runs on the upper surface at the rear portion of the second base plate 411 and is inserted through the lower surface side of the second base plate 411 in order to form the second folding portion 13. Flowing. For this reason, as shown in FIG. 4, the second base plate 411 is configured to lift the rear part high and form a gap with the main body frame part 21. Also, the pair of second folding plates 412 and 412 are formed with inclined surfaces 412b and 412b in plan view at the rear so that the primary processed film material F1 can be easily inserted between the second base plate 411. A space is formed.

  The guide rolls 413 and 413 are brought into contact with the first processed film material F1 inserted through the lower surface side of the second folding plates 412 and 412 at the notches 412a and 412a of the second folding plates 412 and 412 and second. By disposing also in the rear (upstream side) of the folding plate 412, the tendency of the primary processed film material F <b> 1 to be easily bent inward due to the formation of the second folding portion 13 is corrected.

  The second seal forming part 42 includes a preheating heater part 421 and a seal roll part 422 in order to seal the second folding part 13 on the flat part 15. The preheater part 412 is composed of a pair of upper and lower long plates that sandwich the second folding part 13, and performs preheating before heat sealing with the seal roll part 422.

  The seal roll portion 422 is composed of a pair of upper and lower seal rolls that sandwich the primary processed film material F1, and simultaneously holds the flat portion 15 and the second folding portion 13 of the primary processed film material F1 and heats them at a high temperature. Thus, the upper surfaces of the primary processed film material F1 formed so as to be capable of being thermally fused are thermally fused.

  In addition, the 2nd folding part 13 heat-seal | fused is cooled with the cooling fan 45 arrange | positioned in the downstream. By forming the pair of first folding parts 13 and 13 in the primary processed film material F1, the primary processed film material F1 is fed downstream as the processed film material 10.

The line back dancer portion 43 is the same as that disposed in the first fold seal forming portion 30 described above, and is used to rewind the primary processed film material F1 once sealed by the second seal forming portion 42. As shown in FIGS. 7 to 8, the traction roll 431 disposed on the upper surface side of the primary processed film material F1 and the support rolls 432 and 432 disposed on the lower surface side of the film material F are disposed. I have. The pull roll 431 is moved up and down by a pull drive member, for example, a pneumatic cylinder 433. The line back dancer 43 rewinds the primary processed film material F <b> 1 that is actuated integrally with the extending portion 44 and sealed.

  The tension portion 44 is the same as that disposed in the first fold seal forming portion 30 described above, and a plurality of guides for traveling and guiding the film material 10 in order to apply tension to the sealed film material 10. A roll 441 and a swing arm 442 capable of pulling the primary processed film material F1 to maintain a predetermined tension are provided. A pulling roll 443 is attached to the tip of the swing arm 442, and is actuated so as to swing in the vertical direction by detecting the bending state of the primary processed film material F1. Further, the swing arm 442 is operated integrally with the line back dancer portion 43 to perform a rewinding operation of the primary processed film material F1. The line back dancer portion 43 and the extending portion 44 are electrically controlled with the second seal forming portion 42 interposed therebetween, thereby constituting a seal portion defect prevention device as one embodiment of the present invention.

  As shown in FIG. 4, the take-up unit 50 includes a take-up reel 52 that extends from a take-up drive device 51 attached to the main body frame unit 21 toward the traveling path side of the film material 10. The take-up reel 52 is rotatably arranged by a take-up drive device 51. The film material 10 taken up by the take-up reel 52 has a smaller winding amount than the solid film material F wound around the reel 23 of the film material feeding unit 22, so that one reel of the film material feeding unit 22 is wound. A plurality of them will be replaced. Note that two sets of the take-up reel 57 may be installed in order to improve the production amount.

  Next, the operation of the device 20 configured as described above will be described.

  The solid film material F is unwound from the wound state and flows toward the first fold seal forming portion 30 while being guided by the plurality of feed rolls 23. The solid film material F that has entered the first fold seal forming portion 30 passes through the lower surface of the first base plate 311 and travels on the upper surface of the pair of first fold plates 312 and 312 in the middle thereof. Thus, the solid film material F that has passed through the first folding plates 312 and 312 forms a pair of parallel first folding portions 11. The film material F in which the first folding part 11 is formed is sent to the first seal forming part 32 through the space between the pulling roll 331 and the support roll 332 of the line back dancer part 33.

  In the line back dancer section 33, during operation of the apparatus 20, the pulling roll 331 is not moved downward by the pneumatic cylinder 333 as shown in FIG. It will pass at almost the same height as the travel line.

  The first folding portions 11 and 11 are integrated with the flat portion 15 of the solid film material F by passing through the sheet roll portions 322 and 322 when heated by the preheating heater portion 321 in the first seal forming portion 32. And is heat-sealed between the first folding part 11 and the flat part 15.

  In this state, as shown in FIG. 6, the pair of first folding parts 11, 11 are bent inward and overlapped with the flat part 15. Thereafter, when the first folding parts 11 and 11 are cooled by the cooling fan 35, the solid film material F becomes the primary processed film material F1 and travels toward the second folding seal forming part 40.

  In the primary processed film material F1 that is folded in the second fold seal forming portion 40, there is a possibility that the first fold seal portions 11 and 11 are loosened along the advancing direction in the first fold seal forming portion 30. For this reason, the tension is appropriately applied by the tensioning portion 34. At this time, if the primary processed film material F1 is loose along the traveling direction, the pulling roll 343 is pulled by the swinging of the swinging arm 342 and has an appropriate tension.

  The primary processed film material F1 that has entered the second fold seal forming portion 40 first travels on the upper surface of the second base plate 411. When the primary processed film material F1 moves to the front of the second base plate 411, the primary processed film material F1 is separated from the first base plate 411 and the main body frame portion 21 at a portion outside the first folding portions 11, 11. It will drive | work the lower surface side of the 2nd folding plate 412 from between. Thereby, the 2nd folding parts 13 and 13 are formed.

  The primary processed film material F <b> 1 in which the second folding portion 13 is formed is sent to the winding portion 50 through between the pulling roll 431 and the support roll 432 of the line back dancer portion 43.

  In the line back dancer unit 43, as described above, during the operation of the apparatus 20, the pulling roll 431 is not moved downward by the pneumatic cylinder 433 as shown in FIG. It will pass at substantially the same height as the travel line of the second folding formation part 41.

  When the second folding portions 13 and 13 are warmed by the preheating heater portion 421 in the second seal formation portion 40, the second folding portions 13 and 13 pass through the sheet roll portions 422 and 422, thereby causing the flat portion 15 of the primary processed film material F1 and It is integrally heated and heat-sealed between the second folding part 13 and the flat part 15.

  In this state, as shown in FIG. 10, the pair of second folding portions 13 and 13 are bent outward and overlapped with the flat portion 15. Thereafter, the primary processed film material F1 in which the second folding part 13 is formed is cooled by the cooling fan 45 and formed as a processed film material 10.

  The film material 10 sent to the take-up unit 50 is taken up while being traversed by a take-up reel 52 that is continuously moved in the left-right direction. Thereby, the film material 10 forms the first folding parts 11 and 11 and the second folding parts 13 and 13, and the first folding parts 11 and 11 and the second folding parts 13 and 13 make one turn. It will be wound up while shifting its position.

  When a predetermined amount of film material 10 is taken up on the take-up reel 52, after the film material 10 is cut, the operator presses a “stop button” to stop the operation of the apparatus 20 with a stop signal. To do. Then, a new take-up reel 52 is loaded. During this time, the folded portion 11 of the film material F or the folded portion 13 of the primary processed film material F1 that has entered the first seal forming portion 32 and the second seal forming portion 42 is temporarily sealed. It becomes an incomplete seal part by progress. In the control device of the apparatus 20, a seal failure prevention circuit operates, and the line back dancer part 33 and the extension part 34 in the first fold seal forming part 30 and the line back dancer part 43 in the second fold seal forming part 40. And the tensioning portion 44 are operated.

The swing arm 342 and the pulling roll 343 of the extending portion 34 in the first folding seal forming portion 30 swing upward (clockwise in FIG. 4). At the same time, as shown in FIG. The pulling roll 331 of the portion 33 moves downward by driving the pneumatic cylinder 333. Then, the first folding portion 11 of the film material F that has entered the first seal forming portion 31 is pulled by the slack line back dancer portion 33 by the stretching portion 34, so that it is behind the preliminary heater portion 321. Will be rewound .

At the same time, the swing arm 442 and the pulling roll 443 of the extending portion 44 in the second folding seal forming portion 40 swing upward (clockwise in FIG. 4). At the same time, as shown in FIG. The pulling roll 431 of the line back dancer unit 43 moves downward by driving the pneumatic cylinder 433. Then, since the second folded portion 13 of the primary processed film material F1 that has entered the second seal forming portion 41 is pulled by the slack line back dancer portion 43 by the tension portion 44, the preliminary heater portion It is rewound backward from 421.

  When a new take-up reel 52 is loaded, the operator presses a “driving button”. The swing arm 342 and the pull roll 343 of the extending portion 34 of the first folding seal forming section 30 swing in the descending direction (counterclockwise in FIG. 4), and the pull roll 331 of the line back dancer section 33 is pneumatic. The cylinder 333 moves up and returns to the original position. Further, the swing arm 442 and the pulling roll 443 of the extending portion 44 of the second folding seal forming section 40 swing in the descending direction (counterclockwise in FIG. 4), and the pulling roll 431 of the line back dancer unit 43. Is raised by the pneumatic cylinder 433 and returned to its original position. And the apparatus 20 starts operation again. The incomplete seal portion reenters the first seal formation portion 32 and the second seal formation portion 42, is resealed, and is finally taken up by the take-up reel 52.

  As described above, the film material manufacturing apparatus 20 according to the embodiment replaces the take-up reel 52 with the first folding portion 11 (or the second fold portion 11) in which the film material F (or the primary processed film material F1) is sealed. Although the heat of the folding part 13) is cooled and the seal is released, since it is sealed again at the time of re-operation, the part (unfinished seal part) that is not sealed is not formed in the manufactured film material 10, All can be used as non-defective bag-making film goods 10. For this reason, quality defects are reduced and the yield is improved.

  In addition, when the line back dancer portions 33 and 43 constituting the seal failure prevention apparatus are configured as a manufacturing apparatus that manufactures the heavy contents 3 as a packaging bag 1 that can be arranged in a standing manner, the conventional manufacturing apparatus is used. Since the line back dancer portions 33 and 43 can be configured only by being inserted into predetermined positions, the configuration can be easily configured without significantly increasing the cost.

  In addition, in the manufacturing apparatus of the film material of this invention, it does not limit to said form. For example, the defect prevention device for the seal part can be applied to all film material manufacturing apparatuses in which a part of the long film material is continuously sealed in the transport film material manufacturing apparatus. It can be suitably used for an apparatus that performs a sealing process for forming a plastic bag, a sealing process for sealing a backrest part, or a sealing process for forming a gusset part.

  In addition, as for the configuration of the seal failure prevention device, other mechanical elements may be used as long as the film material is loosened on the downstream side of the seal forming portion and the film material is pulled on the upstream side.

It is a perspective view which shows the packaging bag of one form formed with the film material of this invention. It is a plane development view showing a film material of the present invention. It is the III-III sectional view in FIG. It is a simplified front view which shows the manufacturing apparatus of the film material by this invention. It is a top view which shows the 1st seal | sticker formation part in FIG. FIG. It is a simplified front view which shows the line back dancer part in FIG. It is a simplified front view which shows the effect | action of the line back dancer part of FIG. It is a top view which shows the 2nd seal formation part in FIG. It is XX sectional drawing in FIG. It is a perspective view which shows a part of conventional packaging bag manufacturing apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, Packaging bag 3, Contents 5, Pillar part 10, Film material 11, 1st folding part 13, 2nd folding part 15, Plane part 20, Device 22, Film material feeding part 30, 1st folding Seal forming part 31, first fold forming part 32, first seal forming part 33, line back dancer part 331, traction roll 332, support roll 333, pneumatic cylinder 34, tension part 342, swing arm 343, traction Roll 40, second fold seal forming portion 41, second fold forming portion 42, second seal forming portion 43, line back dancer portion 431, traction roll 432, support roll 433, pneumatic cylinder 44, tension portion 442 , Swing arm 443, pulling roll 50, take-up unit 52, take-up reel F, (solid) film material F1, primary processed film material

Claims (3)

A film material feeding unit that unwinds and feeds a wound solid film material into the apparatus, a folding formation unit that forms a folding unit along the longitudinal direction at an intermediate portion in the width direction of the film material, and the folding unit A fold seal forming portion having a seal forming portion that seals and a winding portion that winds up the film material forming the fold portion, and is disposed between the fold forming portion and the seal forming portion. A defect prevention device for a seal part of a film material manufacturing apparatus provided with a line back dancer part configured to be able to rewind the film material fed to the winding part,
The line back dancer portion includes a pair of support rollers for supporting the film material and a pulling roller disposed between the support rollers and capable of moving up and down by pulling the film material. By moving the film material supported on the support roller downward, an uncompleted seal portion of the film material that has moved forward from the seal forming portion along the flow direction of the film material and caused a seal failure The film material is rewound from the seal forming portion to the rear in the flow direction, and then the film material is fed again along the flow direction so that the incomplete seal portion of the film material can be resealed. failure prevention device of the sealing portion of the film material manufacturing apparatus characterized by that. The fold seal forming portion includes a first fold seal forming portion that forms a pair of first fold portions disposed in parallel along the flow direction at an intermediate portion in the width direction of the solid film material, And a second fold seal forming portion that forms a pair of second fold portions disposed on both outer sides of the first fold portion, wherein the line back dancer portion is the first fold portion. The defect prevention device for a seal part of a film material manufacturing apparatus according to claim 1, wherein the seal part is disposed in each of the seal forming part and the second folding seal forming part . A tension is applied to each of the first fold seal forming portion and the second fold seal forming portion in front of the respective seal forming portions along the flow direction of the film material. the tension section is disposed failure prevention device of the sealing portion of the film material manufacturing apparatus according to claim 2, wherein for.

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