JP6199108B2 - Packaging machine - Google Patents

Description

  The present invention relates to a packaging machine that forms a packaging bag by heat-sealing a packaging film, and particularly relates to a sealing device for performing the heat-sealing.

  Conventionally, a packaging bag is formed by heating a packaging film drawn from a roll-shaped packaging material by bending a central portion in a direction orthogonal to the conveying direction along the conveying direction and sandwiching and heating a predetermined position from both sides. A packaging machine has been proposed.

  For example, an automatic packaging machine that performs horizontal sealing using seal fittings at a predetermined interval in the conveyance direction, and performs vertical sealing using seal fittings at the end opposite to the fold in the orthogonal direction perpendicular to the conveyance direction. Has been proposed (see, for example, Patent Document 1).

JP 2005-271987 A

  In the above-described prior art, a packaging bag can be formed by applying a vertical seal and a horizontal seal using a seal fitting. For example, a linear pattern (a linear pattern (for example, a vertical groove pattern or a horizontal groove pattern)) or a grid pattern (a grid pattern) is formed on the seal portion where the seal is applied.

  Here, with respect to the seal portion, the barrier property and aesthetics differ depending on the content of the seal. For example, a seal portion provided with a linear pattern has a relatively strong barrier property because a groove is formed in a direction that divides a leakage path (for example, a leakage path of raw materials, a moisture entering path from the outside). On the other hand, the cross-cut pattern is composed of a set of fine patterns, so it looks beautiful, but a groove in the direction along the leakage path is also formed, so the barrier property is compared to the straight pattern become weak.

  In addition, in the past, when using a packaging film that is not stiff due to cost reasons, or a packaging film that has a tendency to cause thin wrinkles (for example, horizontal wrinkles against a longitudinal groove pattern seal), in order to cut off the leakage path Often, a linear seal is used. However, the traces of the divided leakage paths are conspicuous, which may impair the aesthetic appearance.

  Therefore, it is important to appropriately combine these patterns to improve the barrier property and to provide a seal that is excellent in aesthetics.

  The present invention has been made in view of such a situation, and it is an object of the present invention to improve the barrier property and to provide a seal that is excellent in aesthetics.

  This invention was made | formed in order to eliminate the above-mentioned problem, The 1st side surface is the said that the center part in the orthogonal direction orthogonal to the conveyance direction of a packaging film was bend | folded along the said conveyance direction. A packaging machine that seals the packaging film by pressing the packaging film using a pair of seal portions to form a bag shape having a substantially rectangular storage chamber, wherein the pair of seal portions is A first sealing blade for forming a linear pattern substantially parallel to each side of the storage chamber in a portion of the packaging film that is in contact with the storage chamber of the seal portion to which the seal is applied, and the seal portion It is a packaging machine provided with the combination with the 2nd sealing blade for forming the grid-like pattern in the part of the outer periphery of the part in which the said linear pattern is formed. Accordingly, the packaging film is sealed by pressing using a pair of seal portions including a combination of the first seal blade and the second seal blade, and substantially parallel to each side of the storage chamber at a portion in contact with the storage chamber. A linear pattern is formed, and an effect of forming a bag shape in which a grid-like pattern is formed around the periphery of the part is brought about.

  Further, in the first side surface, the first seal blade has an uneven shape for forming the linear pattern and is configured to mesh with the first seal blade provided in the other seal portion. The second seal blade may have a concave and convex shape for forming the grid-like pattern, and a shape that meshes with the second seal blade provided in the other seal portion. .

  Further, in the first side surface, the pair of seal portions includes a pair of first seal portions that seals an end portion opposite to a folded portion of the packaging film in the orthogonal direction, and the pair of seal portions in the transport direction. A pair of second seal portions that seals both ends of the storage chamber, and the pair of first seal portions and the pair of second seal portions are respectively connected to the first seal blade and the second seal blade. Combinations may be provided.

  In the first aspect, the pair of first seal portions includes the first seal blade for forming the linear pattern at the end opposite to the bent portion, and the first seal. A pair of feeds for transporting the packaging film in the transport direction in units of length for one bag by gripping and rotating a part of the seal portion on which the linear pattern is formed by a blade with a gripping surface. A combination with the second sealing blade provided on the gripping surface of the roll is provided, and the second sealing blade provided on the gripping surface is formed of the first sealing blade in the pair of first seal portions. A concave-convex shape for forming a linear pattern substantially orthogonal to the linear direction, and a shape that meshes with a second seal blade provided on the gripping surface of the other feed roll, and the pair of first seal May be above the grip surface the checkerboard-like pattern in the part held by the one of the seal portions linear pattern formed by the first sealing edge is formed in.

  In the first aspect, the first seal blade and the pair of second seal portions in the pair of first seal portions are configured such that the longitudinal direction of the first seal blade is substantially parallel to the transport direction, and You may make it join in a substantially L shape so that the longitudinal direction of a pair of 2nd seal | sticker part may become substantially parallel to the said orthogonal direction.

  In the first aspect, the pair of second seal portions move in the transport direction in a state in which the end of the storage chamber in the transport direction is gripped, thereby extending the length of the packaging film by one bag. After transporting in the transport direction in units, opening the end, returning to the position before the movement, and sealing the packaging film by sealing the packaging film to form a sealed bag shape You may make it form.

  In the first aspect, the pair of second seal portions may be arranged such that the second seal blade is disposed between the two first seal blades. The sealing blade may be adjacently joined.

  Moreover, in this 1st side surface, each of the said 1st sealing blade and the said 2nd sealing blade may be provided in a separate member, and may be made by different processes.

  According to the present invention, the leakage path is surely divided by a linear pattern to improve barrier properties, and the excellent effect of being able to give an excellent aesthetic seal by making the trace of the leakage path inconspicuous by a grid pattern. Can be played.

It is a front view which shows the external appearance structure of the packaging machine 10 in the 1st Embodiment of this invention. It is a front view which shows the external appearance of the seal part 14 and the feed rolls 15 and 16 in the 1st Embodiment of this invention. It is a side view which shows the external appearance of the seal part 14 and the feed roll 15 in the 1st Embodiment of this invention. It is an external view which shows the L-shaped sealing metal fitting 30 which comprises the seal part 14 in the 1st Embodiment of this invention. It is sectional drawing which shows the cross section of the L-shaped sealing metal fitting 30 in the 1st Embodiment of this invention. It is sectional drawing which shows the cross section when the L-type sealing metal fitting 30 in the 1st Embodiment of this invention is decomposed | disassembled. It is the figure which expanded the seal surface in the 1st seal metal fitting 31, the 2nd seal metal fitting 32, and the 3rd seal metal fitting 33 which comprise L type seal metal fitting 30 in a 1st embodiment of the present invention. It is sectional drawing which shows the cross section of the L-shaped sealing metal fitting 30 in the 1st Embodiment of this invention. It is a figure which shows an example of the opening-and-closing mechanism (including an internal opening-and-closing mechanism) for opening and closing the L-shaped sealing metal fittings 30 and 40 which comprise the seal part 14 in the 1st Embodiment of this invention. It is a figure which shows an example of the opening-and-closing mechanism (including an internal opening-and-closing mechanism) for opening and closing the L-shaped sealing metal fittings 30 and 40 which comprise the seal part 14 in the 1st Embodiment of this invention. It is a figure which shows an example of the opening-and-closing mechanism (including an internal opening-and-closing mechanism) for opening and closing the L-shaped sealing metal fittings 30 and 40 which comprise the seal part 14 in the 1st Embodiment of this invention. It is a figure which shows the state which has shape | molded the packaging bag with the packaging machine 10 in the 1st Embodiment of this invention. It is a figure which shows the external appearance of the packaging bag 90 produced | generated by the packaging machine 10 in the 1st Embodiment of this invention. It is a front view which shows the external appearance structure of the packaging machine 100 in the 2nd Embodiment of this invention. It is a side view which shows the external appearance of the 1st seal part 110 and the 2nd seal part 120 in the 2nd Embodiment of this invention.

  Embodiments of the present invention will be described below.

[1. First Embodiment]
FIG. 1 is a front view showing an external configuration of a packaging machine 10 according to the first embodiment of the present invention.

  The packaging machine 10 includes a packaging material attachment shaft 11, a content supply unit 12, a former 13, a seal unit 14, feed rolls 15 and 16, a cutter unit 17, a control unit 18, and a control panel 19. Prepare. The packaging machine 10 is, for example, an L-shaped sealing metal type automatic packaging machine (vertical filling packaging machine) that forms a packaging bag by sealing a packaging film using an L-shaped sealing metal fitting.

  The packaging material mounting shaft 11 is a shaft to which the packaging material 21 is mounted. In addition, the packaging material 21 winds up a packaging film around the same axis in a coil shape. The packaging film is made of, for example, a transparent or translucent material. For example, the packaging film is composed of a base film such as PET (Polyethylene terephthalate) or a heat seal film such as polyethylene having a melting point lower than that of the base film.

  The content supply part 12 supplies the former 13 with the content (raw material) thrown into the inside of the packaging bag formed from a packaging film. Specifically, the contents (raw material) accommodated in a hopper (not shown) are weighed to a certain amount by a measuring turntable (not shown). Then, the weighed contents are dropped into the filling chute inlet at a predetermined timing and put into the packaging film bag into which the filling chute outlet is inserted.

  The former 13 makes the packaging film 22 drawn out from the packaging material 21 into a cylindrical shape. That is, the long packaging film 22 drawn out from the packaging material 21 is continuously conveyed downward in the vertical direction (direction parallel to the direction of gravity). Then, the former 13 folds the long packaging film 22 into a U-shape by bending the central portion in the orthogonal direction orthogonal to the conveyance direction into a U shape along the conveyance direction. Shape.

  In addition, the former 13 serves as a pipe that puts the content supplied from the content supply unit 12 into a bag portion (a long packaging film having a bag shape) formed by the seal unit 14. Happen. That is, the former 13 functions as a filling device that fills the bag portion formed by the seal portion 14 with the content supplied from the content supply portion 12.

  The seal part 14 is a pair of seal parts that are installed immediately below the former 13 and heat-seal by sandwiching a packaging film formed into a cylinder by the former 13 to form a bag shape. Specifically, the seal portion 14 forms a bag shape by simultaneously performing vertical heat sealing and horizontal heat sealing by sandwiching a packaging film folded in two by the former 13. That is, the packaging film folded in two has a bag shape in which the lower and side portions are sealed and the upper side is vacant. The seal portion 14 will be described in detail with reference to FIG.

  The feed rolls 15 and 16 are heat-sealed by the seal portion 14 and convey a packaging film including a bag portion filled with contents by the former 13 to the lower side in the vertical direction in units of length for one bag. Is. In addition, after the packaging film is conveyed by one bag by the feed rolls 15 and 16 to the lower side in the vertical direction, the seal unit 14 performs vertical heat sealing and horizontal heat sealing by sandwiching the packaging film. Thereby, while the upper part of the bag part with which the content was filled is sealed, the following bag shape is formed. In this way, by repeating the content filling operation and the sealing operation of the upper portion of the bag, a plurality of packaging bags in which the upper portion of the bag portion is connected to the lower portion of the next bag portion can be sequentially generated. Then, a plurality of continuous packaging bags are conveyed to the cutter unit 17 directly below.

  Further, the feed rolls 15 and 16 are each provided with a transverse groove pattern sealing blade on each gripping surface. For example, the feed roll 15 is provided with a sealing blade having a horizontal groove pattern (the horizontal groove pattern 38 shown in FIG. 3) on the gripping surface. And the feed rolls 15 and 16 hold | grip the vertical seal part which 1 or more vertical groove patterns left | separated from the storage chamber of the packaging bag among the packaging films 22. FIG. Thereby, the vertical groove pattern along the seal edge is left in the seal edge portion in contact with the storage chamber in the vertical seal portion, and a grid pattern is formed in the other portion.

  The feed rolls 15 and 16 are separated by the thickness of the packaging film 22. The feed rolls 15 and 16 will be described in detail with reference to FIG.

  The cutter unit 17 is a cutter device installed immediately below the feed rolls 15 and 16 and cuts the packaging film conveyed from the feed rolls 15 and 16 for each bag. And the cutter part 17 drops the packaging bag which was cut | disconnected and became the individual packaging form to a conveyance part (for example, belt conveyor). Thus, the packaging bag which fell to the conveyance part is conveyed by a conveyance part, for example, and boxed. In addition, you may make it the cutter part 17 cut | disconnect a perforation etc. in a packaging film for every 1 bag instead of cut | disconnecting the packaging film conveyed from the feed rolls 15 and 16 for every bag.

  The control unit 18 includes a control panel 19, and controls each unit of the packaging machine 10 based on an operation input on the control panel 19 and a control program. For example, the control unit 18 includes a CPU (Central Processing Unit), a RAM (Random Access Memory), and a ROM (Read Only Memory). For example, a control program is stored in the ROM. The CPU reads a control program stored in the ROM, and executes each process based on the control program.

  Next, with reference to FIG. 2 thru | or FIG. 8, the seal | sticker part 14 and the feed rolls 15 and 16 are demonstrated in detail.

  FIG. 2 is a front view showing the appearance of the seal portion 14 and the feed rolls 15 and 16 in the first embodiment of the present invention.

  FIG. 3 is a side view showing the appearance of the seal portion 14 and the feed roll 15 in the first embodiment of the present invention. 3 shows the seal portion 14 and the feed roll 15 when viewed from the arrow A shown in FIG.

  FIG. 4 is an external view showing an L-shaped seal fitting 30 constituting the seal portion 14 in the first embodiment of the present invention. FIG. 4 shows only the L-shaped seal fitting 30 and screws 61 to 64 in the seal portion 14 shown in FIG.

  FIG. 5 is a cross-sectional view showing a cross section of the L-shaped seal fitting 30 in the first embodiment of the present invention. FIG. 5 shows a cross section of the L-shaped seal fitting 30 when viewed from the arrow B shown in FIG.

  FIG. 6 is a cross-sectional view showing a cross section when the L-shaped seal fitting 30 according to the first embodiment of the present invention is disassembled. 6 shows a cross-sectional view corresponding to the cross section shown in FIG.

  FIG. 7 is an enlarged view of the sealing surfaces of the first seal fitting 31, the second seal fitting 32, and the third seal fitting 33 that constitute the L-shaped seal fitting 30 in the first embodiment of the present invention.

  FIG. 8 is a cross-sectional view showing a cross section of the L-shaped seal fitting 30 in the first embodiment of the present invention. FIG. 8 shows a cross section of the L-shaped seal fitting 30 when viewed from the arrow C shown in FIG.

  As shown in FIG. 1 to FIG. 8, the packaging machine 10 presses the packaging film in which the central portion in the orthogonal direction orthogonal to the conveyance direction of the packaging film is bent along the conveyance direction, using the seal portion 14. By this, it is a packaging machine which seals a packaging film and forms a bag shape provided with a substantially rectangular storage chamber. Here, the seal portion 14 includes a combination of a first seal blade and a second seal blade. In addition, each of the first seal blade and the second seal blade is provided in a separate member and is subjected to different processing.

  Here, the first sealing blade is a sealing blade for forming a linear pattern substantially parallel to each side of the storage chamber in a portion of the sealing portion that is sealed in the packaging film that is in contact with the storage chamber. The seal blade of the vertical groove pattern 34 and the seal blade of the horizontal groove patterns 36 and 37 correspond. That is, the first seal blade has an uneven shape for forming a linear pattern, and has a shape that meshes with the first seal blade provided in the other seal portion.

  Further, the second sealing blade is a sealing blade for forming a grid-like pattern on the outer periphery of the portion where the linear pattern is formed among the sealing portions to be sealed in the packaging film. The combination of the sealing blade of the grid pattern 35 and the sealing blade of the vertical groove pattern 34 and the sealing blade of the horizontal groove pattern 38 corresponds. In other words, the second seal blade has an uneven shape for forming a grid-like pattern, and has a shape that meshes with the second seal blade provided in the other seal portion.

  Further, the seal portion 14 includes a pair of first seal portions (vertical seal portions) that seals an end opposite to the folded portion of the packaging film in an orthogonal direction orthogonal to the packaging film conveyance direction, and the conveyance direction thereof. And a pair of second seal portions (lateral seal portions) that seals both ends of the storage chamber. Here, the pair of first seal portions (vertical seal portions) includes a part of the first seal fitting 31 and the first seal fitting 41 (a portion including the seal blade of the vertical groove pattern 34 and the seal blade meshing with the first groove). A pair of feed rolls 15 and 16 (corresponding to a portion including the sealing blade of the lateral groove pattern 38 and the sealing blade meshing therewith) correspond.

  For example, one of the pair of first seal portions (vertical seal portions) is a seal in which a linear pattern is formed by a seal blade of the vertical groove pattern 34 and a seal blade of the vertical groove pattern 34. The sealing blade of the lateral groove pattern 38 provided on the gripping surface of the feed roll 15 that transports the packaging film in the transporting direction in units of length of one bag by gripping and rotating a part of the portion with the gripping surface With a combination.

  In addition, the pair of second seal portions (lateral seal portions) includes a part of the first seal fitting 31 and the first seal fitting 41 (a portion including the sealing blade of the grid pattern 35 and the sealing blade meshing with the first sealing fitting 31). The second seal fitting 32 and the third seal fitting 33, and the second seal fitting 42 and the third seal fitting 43. The pair of second seal portions (lateral seal portions) are adjacent to each other so that the second seal blade is disposed between the two first seal blades. Are joined.

  Further, the first seal blade and the pair of second seal portions in the pair of first seal portions (vertical seal portions) have a longitudinal direction of the first seal blade substantially parallel to the conveyance direction of the packaging film, and a pair of second seal portions. The seal portion is joined in a substantially L shape so that the longitudinal direction of the seal portion is substantially parallel to the orthogonal direction perpendicular to the transport direction.

  As shown in FIGS. 2 to 8, the L-shaped seal fitting 30 is configured such that the first seal fitting 31, the second seal fitting 32, and the third seal fitting 33 can be separated from each other. The L-type seal fitting 40 is configured such that the first seal fitting 41, the second seal fitting 42, and the third seal fitting 43 can be separated from each other. The seal fitting is also referred to as a seal bar.

  Each seal fitting and each feed roll can be formed using a metal such as stainless steel or titanium. Moreover, you may make it use heat resistant rubber | gum, a plastics, etc. as each sealing metal fitting and each feed roll.

  For example, as shown in FIGS. 5 and 6, the second seal fitting 32 is attached to the first seal fitting 31 by tightening the screw 62 into the screw hole 66 through the hole 65. Similarly, the third seal fitting 33 is attached to the first seal fitting 31 by tightening the screw 64 into the screw hole 68 through the hole 67. In addition, in embodiment of this invention, although the example which attaches seal metal fittings using a screw is shown, you may make it use other attachment methods. For example, the seal fittings may be attached by welding.

  In the first embodiment of the present invention, an example is shown in which a vertical seal fitting for applying a vertical seal and a horizontal seal fitting for applying a horizontal seal are integrally combined. That is, when the vertical seal metal fitting and the horizontal seal metal fitting are integrally combined, the vertical seal metal fitting and the horizontal seal metal fitting can be pressed simultaneously, so that the vertical seal and the horizontal seal can be performed simultaneously. Note that an example in which the vertical seal fitting and the horizontal seal fitting are individually configured will be described in the second embodiment of the present invention.

  Here, the seal blade (seal surface) for forming the respective seal portions of the vertical groove pattern, the horizontal groove pattern, and the grid pattern will be described. The sealing blade for forming the vertical groove pattern has a concavo-convex shape in which peaks and valleys extending in the longitudinal direction (vertical direction) as the longitudinal direction are formed. Moreover, a peak part and a trough part are arrange | positioned so that the uneven | corrugated shape may mesh | engage with a pair of vertical seal metal fittings.

  Moreover, the sealing blade for forming a horizontal groove pattern is a concavo-convex shape in which peaks and valleys extending in the horizontal direction (horizontal direction) as a longitudinal direction are formed. Moreover, a peak part and a trough part are arrange | positioned so that the peak part and trough part may mesh | engage with a pair of horizontal seal metal fittings.

  In addition, the sealing blade for forming the grid pattern has a concavo-convex shape in which either one of the quadrangular pyramidal convex portions or the concave portions is formed in a grid pattern (lattice shape). In addition, either one of a quadrangular pyramid-shaped convex portion or a concave portion is arranged so that the concave-convex shape is engaged between a pair of grid seal fittings. However, in the first embodiment of the present invention, an example in which a grid pattern is formed by a combination of a seal blade for forming a longitudinal groove pattern and a seal blade for forming a lateral groove pattern is shown.

  Here, processing of the first seal fitting (cross pattern), the second seal fitting (lateral groove pattern), and the third seal fitting (lateral groove pattern) constituting the horizontal seal fitting will be described.

  It is difficult to integrally process the cross-patterned seal fitting (first seal fitting) and the lateral groove patterned seal fitting (second seal fitting and third seal fitting).

  For example, after processing a horizontal groove pattern (horizontal groove pattern sealing blade) on an integrated seal fitting, processing a grid pattern (cross pattern sealing blade) in the area adjacent to the area where the horizontal groove pattern is applied The case where it applies is assumed. In this case, when the grid pattern is processed, there is a high possibility that the grid pattern is processed in the horizontal groove pattern area in the vicinity of the boundary with the horizontal groove pattern area. For this reason, there is a possibility that each pattern cannot be applied accurately in the vicinity of the boundary between the horizontal groove pattern area and the grid pattern area.

  Therefore, in the embodiment of the present invention, the sealing blades having different patterns are processed separately and used in combination. Accordingly, it is possible to use a sealing blade in which each pattern is accurately applied even near the boundary between the patterns.

  For example, after the vertical groove pattern is processed on the first seal fitting (cross-cut pattern), the second seal fitting (horizontal groove pattern) and the third seal fitting (horizontal groove pattern) are combined with the first seal fitting (cross-cut pattern). Each of these sealing blades is processed with a transverse groove pattern. By performing processing in this way, it is possible to accurately process the horizontal seal fitting. However, you may make it process a horizontal seal metal fitting using another processing method. For example, each of the first seal fitting (cross pattern), the second seal fitting (horizontal groove pattern), and the third seal fitting (horizontal groove pattern) is processed separately, and each of the processed seal fittings is processed. You may make it combine.

  As shown in FIGS. 5, 6, and 8, heaters 71 and 73 and temperature sensors 72 and 74 are built in the vertical seal fitting and the horizontal seal fitting, respectively. Each of the vertical seal fitting and the horizontal seal fitting is heated by a heater. And the control part 18 controls the presence or absence of operation | movement of each heater, preset temperature, etc. based on the temperature detected by the temperature sensor.

  9 to 11 are views showing an example of an opening / closing mechanism (including an internal opening / closing mechanism) for opening and closing the L-shaped seal fittings 30 and 40 constituting the seal portion 14 in the first embodiment of the present invention. is there. 9 to 11 show an appearance when the seal portion 14 is viewed from the upper side in the vertical direction. 9 to 11 show transitions when the L-shaped seal fittings 30 and 40 constituting the seal portion 14 open and close.

  The press arms 51 and 52 move according to the rotation of the opening and closing cam 57 around the fulcrum shaft 53 fixed to the wall surface 59 of the main body of the packaging machine 10. The press arm 51 is provided with an L-shaped seal fitting 30 and a cam follower 54, and the press arm 52 is provided with an L-type seal fitting 40 and a cam follower 55. In the vertical direction, the press arm 51 is attached to the upper side, and the press arm 52 is attached to the lower side.

  The press arm 51 is biased by a spring so that the cam follower 54 is pressed against the opening / closing cam 56. Similarly, the press arm 52 is biased by a spring so that the cam follower 55 is pressed against the opening / closing cam 57. As a result, the cam follower 54 is brought into contact with the opening / closing cam 56 and the cam follower 55 is brought into contact with the opening / closing cam 57.

  In the vertical direction, the opening / closing cam 56 is attached to the upper side, and the opening / closing cam 57 is attached to the lower side. That is, in the vertical direction, the press arm 51, the cam follower 54, and the opening / closing cam 56 are installed at substantially the same position, and the press arm 52, the cam follower 55, and the opening / closing cam 57 are installed at substantially the same position.

  The open / close cams 56 and 57 are attached to a drive shaft 58 connected to a motor (not shown). The drive shaft 58 and the open / close cams 56 and 57 rotate according to the rotation of the motor, and the press arms 51 and 52 are driven according to this rotation.

  For example, as shown in FIG. 9, when the drive shaft 58 and the opening / closing cams 56 and 57 rotate in the directions of arrows 1 and 2 with the L-shaped seal fittings 30 and 40 constituting the seal portion 14 open, As shown in FIGS. 10 and 11, the L-shaped seal fittings 30 and 40 are shifted to a closed state.

  Here, if the L-shaped seal fittings 30 and 40 are opened and closed by continuing the rotation of the drive shaft 58 and the opening and closing cams 56 and 57 in one direction, the amount of movement of the L-type seal fittings 30 and 40 increases. Therefore, the amount of movement of the L-shaped seal fittings 30 and 40 can be reduced by controlling the rotation direction (the direction of arrows 1 and 2 and the opposite direction) and the rotation amount of the drive shaft 58 and the opening and closing cams 56 and 57. it can. Thus, by controlling the rotation direction and amount of rotation of the drive shaft 58 and the opening / closing cams 56, 57, the opening / closing width of the L-shaped seal fittings 30, 40 can be reduced.

  As shown in FIG. 11, the L-shaped seal fittings 30 and 40 are separated by the thickness of the packaging film.

  FIG. 12 is a diagram illustrating a state in which a packaging bag is formed by the packaging machine 10 according to the first embodiment of the present invention. FIG. 12 is a view in which a packaging film 80 is added to the example shown in FIG.

  The wrapping film 80 is wound around the former 13 and bent into two in a U shape at the center. The packaging film 80 folded in this way is sandwiched between the seal portions 14 (L-shaped seal fittings 30 and 40) installed immediately below the former 13, and subjected to vertical heat seal and horizontal heat seal at the same time. Is formed. That is, heat sealing is applied to the lower part and the end part (end part opposite to the central part) of the folded packaging film 80, and the central part, lower part and end part (opposite side of the central part) of the packaging film 80 are applied. A bag shape is formed by the end portion. Thus, after the bag shape is formed for the packaging film 80, the former 13 outputs the content 3 and accommodates the content 3 in the bag shape. That is, as shown in FIG. 12, the content 3 output from the former 13 falls into the bag shape and is accumulated in the bag shape. In this state, since the feed rolls 15 and 16 are in a rotation stopped state, the transport operation of the packaging film 80 is in a stopped state.

  Subsequently, the seal portion 14 (L-shaped seal fittings 30 and 40) is opened, and the packaging film 80 is conveyed downward by one bag. That is, when the feed rolls 15 and 16 are rotated, the packaging film 80 is conveyed downward in the vertical direction by one bag. At the time of this rotation operation, a part of the vertical seal portion 81 provided with the vertical groove pattern by the seal portion 14 (L-shaped seal fittings 30 and 40) is sandwiched by the feed rolls 15 and 16 provided with the horizontal groove pattern, A grid pattern 83 is applied to the vertical seal portion 81.

  Here, in a state where the feed rolls 15 and 16 sandwich a part of the vertical seal portion 81, it is assumed that the vertical seal portion 81 has residual heat. For this reason, the feed rolls 15 and 16 do not need to be provided with a heater. However, the feed rolls 15 and 16 may be provided with a heater, and the feed rolls 15 and 16 may heat seal the vertical seal portion. Of the vertical seal portion 81, the vertical groove pattern 82 applied by the seal portion 14 (L-shaped seal fittings 30, 40) remains as it is for portions not sandwiched by the feed rolls 15, 16.

  That is, in the embodiment of the present invention, it is necessary to make a groove pattern (vertical groove pattern, horizontal groove pattern) in the seal portion of the packaging bag that is in contact with the storage chamber (portion along the periphery of the storage chamber). For this reason, as shown in FIG. 12, the feed rolls 15 and 16 are arrange | positioned so that the vertical seal | sticker part 81 in which one or more vertical groove patterns left | separated from the bag-shaped storage chamber may be hold | gripped.

  Subsequently, the bag-shaped upper packaging film 80 in which the contents 3 are accommodated is sandwiched between the seal portions 14 (L-shaped seal fittings 30 and 40) and subjected to vertical heat sealing and horizontal heat sealing at the same time. Thereby, a horizontal heat seal is given to the bag-shaped upper part in which the contents 3 are accommodated. That is, the filling port is sealed to form a sealed bag shape. In addition, a sealed bag shape is formed and a new bag shape is formed. Thereafter, the formation of the packaging bag and the storage of the contents are repeated in the same manner.

  Further, the packaging film 80 in which the three sides are sealed (the packaging film 80 in which the three sides are sealed) is cut for each bag by the cutter unit 17. FIG. 13 shows the packaging bag thus cut.

  FIG. 13 is a diagram illustrating an appearance of the packaging bag 90 generated by the packaging machine 10 according to the first embodiment of the present invention.

  The packaging bag 90 is a bag produced by sealing three sides of the packaging film folded in two at the center. Specifically, an accommodation portion 98 that accommodates the contents 5 is formed by the three seal portions (the lateral seal portion 91, the longitudinal seal portion 92, and the lateral seal portion 93) of the packaging film. Of the seal portions (the horizontal seal portion 91, the vertical seal portion 92, and the horizontal seal portion 93), a portion in contact with the accommodating portion 98 is provided with a horizontal groove pattern 94, a vertical groove pattern 95, and a horizontal groove pattern 96. Further, a grid pattern 97 is provided on other portions of the seal portions (the horizontal seal portion 91, the vertical seal portion 92, and the horizontal seal portion 93).

[Second Embodiment]
In the first embodiment of the present invention, the L-type seal fitting type packaging machine 10 using the L-type seal fitting in which the vertical seal fitting and the horizontal seal fitting are integrated has been described as an example. That is, in the first embodiment of the present invention, the example in which the vertical seal fitting and the horizontal seal fitting are combined and the sealing operation (press) is performed at the same time has been described.

  However, the embodiment of the present invention can also be applied to a packaging machine that uses a seal fitting other than the L-shaped seal fitting. For example, the present invention can also be applied to a packaging machine in which vertical seal fittings and horizontal seal fittings are separately installed. Therefore, in the second embodiment of the present invention, an example of a packaging machine in which vertical seal fittings and horizontal seal fittings are separately installed is shown. That is, in the second embodiment of the present invention, the vertical seal fitting and the horizontal seal fitting are individually configured, and after the vertical seal fitting performs the sealing operation (press), the horizontal sealing fitting performs the sealing operation (press). An example is shown.

  FIG. 14 is a front view showing an external configuration of the packaging machine 100 according to the second embodiment of the present invention. Note that the packaging machine 100 is obtained by modifying a part of the packaging machine 10 according to the first embodiment of the present invention. For this reason, the same code | symbol is attached | subjected to the part which is common in the packaging machine 10, and some of these description is abbreviate | omitted.

  The packaging machine 100 includes a first seal part 110, a second seal part 120, and a control part 130. These will be described in detail with reference to FIG.

  FIG. 15 is a side view showing the external appearance of the first seal part 110 and the second seal part 120 in the second embodiment of the present invention. FIG. 15 is a side view corresponding to the external view shown in FIG. In FIG. 15, only one seal fitting (the first seal fitting 112 and the second seal fitting 113) of the pair of seal fittings constituting the first seal portion 110 is shown, and the other seal fitting is not shown. To do. FIG. 15 shows only one seal fitting (first seal fitting 122, second seal fitting 123, and third seal fitting 124) of the pair of seal fittings constituting the second seal portion 120, while the other seal fitting is shown. The illustration of the seal fitting is omitted.

  The first seal portion 110 is installed directly below the former 13 and performs heat sealing by sandwiching a packaging film formed into a cylindrical shape by the former 13. Specifically, the first seal portion 110 is formed into a bag shape by performing only vertical heat sealing by sandwiching the end portion (the end portion opposite to the center portion) of the packaging film folded in two by the former 13. The vertical seal portion is formed.

  Further, as shown in FIG. 15, of the pair of seal fittings constituting the first seal portion 110, one seal fitting is configured such that the first seal fitting 112 and the second seal fitting 113 can be separated from each other. . Further, a sealing blade of a grid pattern 114 is provided on the sealing surface of the first seal fitting 112, and a sealing blade of a longitudinal groove pattern 115 is provided on the sealing surface of the second seal fitting 113.

  The 2nd seal part 120 is installed just under the 1st seal part 110, and performs a transverse heat seal by inserting a packaging film. Specifically, the second seal portion 120 forms a bag-shaped lateral seal portion by performing only the lateral heat seal by sandwiching the upper and lower portions of the packaging film together with the longitudinal heat seal by the former 13.

  In other words, the packaging film folded in two is sealed in the side portion by the first seal portion 110 and the bottom portion is sealed by the second seal portion 120, thereby forming a bag shape having an open upper side.

  As shown in FIG. 15, one of the pair of seal fittings constituting the second seal portion 120 includes a first seal fitting 122, a second seal fitting 123, and a third seal fitting 124. Are configured to be separable. Further, a sealing blade of a grid pattern 125 is provided on the sealing surface of the first seal fitting 122, a sealing blade of a lateral groove pattern 126 is provided on the sealing surface of the second sealing fitting 123, and a third sealing fitting 124 is provided. A sealing blade having a lateral groove pattern 127 is provided on the sealing surface.

  The second seal portion 120 is a length of one bag of a packaging film including a bag portion that is heat-sealed by the first seal portion 110 and the second seal portion 120 and filled with contents by the former 13. The unit is transported vertically downward. Specifically, as shown in FIG. 14, each of the pair of seal fittings 161 and 162 constituting the second seal portion 120 is moved in a box shape according to arrows 163 and 164, so that one package of packaging film can be obtained. It is only transported downward in the vertical direction (so-called box motion). That is, the seal metal fitting 161 is moved in a box shape according to an arrow 163, and the seal metal fitting 162 is moved in a box shape according to an arrow 164, whereby the packaging film is conveyed downward in the vertical direction by one bag. The seal fitting 161 corresponds to the first seal fitting 122, the second seal fitting 123, and the third seal fitting 124 shown in FIG. That is, as indicated by an arrow 150 in FIG. 15, in the vertical direction, the second seal portion 120 transitions between a state illustrated in FIG. 15 and a state illustrated by a dotted line 151.

  Further, the control unit 130 controls each unit of the packaging machine 100 including the first seal unit 110 and the second seal unit 120 based on an operation input and a control program on the control panel 19.

  As described above, the second seal portion 120 (a pair of second seal portions) moves in the transport direction in a state where the end portion of the storage chamber in the transport direction of the packaging film 22 is gripped, whereby one bag of the packaging film 22 is obtained. Transport in the transport direction in minutes. Then, the second seal portion 120 returns to the position before the movement after opening the end portion, and seals the packaging film 22 to seal the filling port of the storage chamber to form a sealed bag shape. To do.

  Here, for example, a case is assumed in which a packaging bag having a lateral groove pattern is formed on the lateral seal portion using a conventional vertical filling and packaging machine. In this case, the packaging film may be stretched in the vertical direction by the weight of the contents of the packaging bag before the packaging film is cut, and a vertical groove may be formed in the lateral groove pattern applied to the lateral seal portion. As described above, when a vertical seal is formed in the horizontal seal portion, there is a possibility that a leakage path for contents is formed in the packaging bag. Moreover, when the leakage path of the contents is formed in the packaging bag, the packaging bag becomes defective and is wasted. Moreover, when the entire surface of the seal portion has a horizontal groove pattern, there is a possibility that a leakage path trace may be conspicuous. In addition, the lateral groove pattern is inferior in beauty compared to the cross-cut pattern.

  Therefore, it is assumed that the entire horizontal seal portion has a grid pattern. In this case, the leakage path traces of the contents can be made inconspicuous, and the aesthetic appearance can be improved because the grid pattern itself is beautiful. However, even when the entire horizontal seal portion is a grid pattern, it is difficult to completely cut off the leakage path of the contents because the grid pattern also includes a vertical pattern.

  Therefore, in the embodiment of the present invention, the seal fitting that is separable for each pattern of the seal surface is used, and the portion of the seal portion of the packaging bag that is in contact with the storage chamber (the portion along the periphery of the storage chamber). A groove pattern (vertical groove pattern, horizontal groove pattern) is used, and the other part is a grid pattern. Thereby, the sealing edge part which touches a storage chamber can be formed with the groove pattern along a sealing edge, and while improving the barrier property (quality) of a packaging bag, the packaging bag excellent in aesthetics can be provided. . That is, in order to prevent the leakage path from being formed by the film ridges, packaging is performed with a groove pattern (horizontal groove pattern, vertical groove pattern) in the direction orthogonal to the assumed film ridge direction (direction along the seal edge of the storage chamber). The barrier property of the bag can be strengthened. In terms of aesthetics, a grid pattern is superior to a groove pattern (horizontal groove pattern, vertical groove pattern), and therefore, a grid pattern is applied to the outside of the seal portion of the packaging bag.

  That is, according to the embodiment of the present invention, the leakage path is surely divided by a linear pattern to enhance the barrier property, and the cutting trace of the leakage path is made inconspicuous by a grid pattern to provide a seal with an aesthetic appearance. Can do.

  Moreover, in embodiment of this invention, it is set as the structure which can assemble / separate the sealing blade of a sealing metal fitting. As a result, it is possible to form a seal portion combining a groove pattern (horizontal groove pattern, vertical groove pattern) and a grid pattern that could not be manufactured in the past. That is, in the embodiment of the present invention, a separation type heat seal device can be realized.

  In the embodiment of the present invention, a packaging machine (for example, a vertical automatic filling and packaging machine) that generates a three-sided packaging bag (a packaging bag in which three sides are sealed) has been described as an example. However, the embodiment of the present invention can also be applied to a packaging machine that generates a four-way packaging bag (a packaging bag in which the four sides are sealed). In this packaging machine (a packaging machine that generates a four-sided packaging bag), for example, a substantially H-shaped seal bracket or a substantially U-shaped seal bracket can be used instead of using a substantially L-shaped seal bracket. . For example, when using a substantially H-shaped seal fitting, the seal fitting corresponding to the H-shaped horizontal bar is a horizontal seal fitting, and the seal fitting corresponding to two H-shaped vertical bars is a vertical sealing fitting. Can do. Further, for example, when using a substantially U-shaped seal fitting, the seal fitting corresponding to the U-shaped vertical bar is used as a horizontal seal fitting, and the seal fitting corresponding to the two U-shaped horizontal bars is used as a vertical seal. It can be a seal fitting. For example, when a substantially U-shaped seal fitting is used, the two corners of the storage chamber of the four-way packaging bag can be formed into an R shape (curved shape), and a substantially H-shaped seal fitting is used. In addition, the four corners of the storage chamber of the four-way packaging bag can be formed into an R shape (curved shape).

  Note that the above-described embodiment shows an example for embodying the present invention, and the matters in the embodiment and the invention-specific matters in the claims have a corresponding relationship. Similarly, the matters specifying the invention in the claims and the matters in the embodiment of the present invention having the same names as the claims have a corresponding relationship. However, the present invention is not limited to the embodiment, and can be embodied by making various modifications to the embodiment without departing from the scope of the invention.

DESCRIPTION OF SYMBOLS 10,100 Packaging machine 11 Packaging material attachment shaft 12 Contents supply part 13 Former 14 Seal part 15, 16 Feed roll 17 Cutter part 18, 130 Control part 19 Control panel 21 Packaging material 22 Packaging film 30, 40 L-type sealing metal fitting 31 , 41 First seal fitting 32, 42 Second seal fitting 33, 43 Third seal fitting 34, 115 Vertical groove pattern 35, 114, 125 Cross-cut pattern 36-38, 126, 127 Horizontal groove pattern 51, 52 Press arm 53 Support point Shafts 54, 55 Cam followers 56, 57 Opening / closing cam 58 Drive shaft 59 Wall surface 61-64 Screws 65, 67 Holes 66, 68 Screw holes 71, 73 Heater 72, 74 Temperature sensor 110 First seal part 112 First seal fitting 113 Second seal fitting 120 Second seal portion 122 First seal fitting 1 3 second seal fitting 124 third seal fitting 161, 162 seal fittings

Claims (6)

The packaging film is sealed by pressing the packaging film in which the central portion in the orthogonal direction orthogonal to the packaging film conveyance direction is bent along the conveyance direction by using a pair of seal portions, and is substantially rectangular. A packaging machine for forming a bag shape including a storage chamber,
The pair of seal portions is a first portion for forming a linear pattern substantially parallel to each side of the storage chamber in a portion of the packaging film in contact with the storage chamber of the seal portion to which the seal is applied. 1 seal blade and a combination of a second seal blade for forming a grid-like pattern on the outer periphery of the portion of the seal portion where the linear pattern is formed ,
The pair of seal portions seals both ends of the storage chamber in the transport direction and a pair of first seal portions that seal the opposite end of the packaging film in the orthogonal direction. A pair of second seal portions,
Each of the pair of first seal portions and the pair of second seal portions includes a combination of the first seal blade and the second seal blade,
The pair of first seal portions includes the first seal blade for forming the linear pattern at an end opposite to the bent portion, and the linear pattern is formed by the first seal blade. The gripping surface is provided on the gripping surface of a pair of feed rolls that transports the packaging film in the transporting direction in units of length of one bag by rotating by gripping a part of the sealed portion with the gripping surface. A combination with the second sealing blade
The second sealing blade provided on the gripping surface has an uneven shape for forming a linear pattern substantially perpendicular to the linear direction of the first sealing blade in the pair of first seal portions, A shape that meshes with a second sealing blade provided on the gripping surface of the other feed roll;
The grid-like pattern is formed on a portion gripped by the gripping surface of a seal portion where a linear pattern is formed by the first seal blade in the pair of first seal portions. Packaging machine. In the first seal blade and the pair of second seal portions in the pair of first seal portions, the longitudinal direction of the first seal blade is substantially parallel to the transport direction, and the longitudinal direction of the pair of second seal portions. There packaging machine according to claim 1, wherein is joined to a substantially L-shape so as to be substantially parallel to the orthogonal direction. The pair of second seal portions transports the packaging film in the transport direction in units of length of one bag by moving in the transport direction while gripping the end of the storage chamber in the transport direction. , of claim 1 packaging machine forming the return to the position before movement the packaging film to the bag-shaped sealing seals the filling opening of the storage chamber by applying a seal after opening the end portion . In the pair of second seal portions, the two first seal blades and the second seal blade are adjacently joined so that the second seal blade is disposed between the two first seal blades. The packaging machine according to any one of claims 1 to 3 . Each of the said 1st sealing blade and the said 2nd sealing blade is a packaging machine in any one of Claims 1 thru | or 4 with which it was provided in the separate member and was given by different process. The packaging film is sealed by pressing the packaging film in which the central portion in the orthogonal direction orthogonal to the packaging film conveyance direction is bent along the conveyance direction by using a pair of seal portions, and is substantially rectangular. A packaging machine for forming a bag shape including a storage chamber,
The pair of seal portions seals an end portion of the packaging film opposite to the bent portion in the orthogonal direction, and the accommodation of the seal portions to be sealed in the packaging film A first seal blade for forming a linear pattern substantially parallel to each side of the storage chamber at a portion in contact with the chamber, and an outer periphery of a portion of the seal portion where the linear pattern is formed In combination with a second sealing blade for forming a grid-like pattern on the part,
The second sealing blade has a length corresponding to one bag by rotating a part of the sealing part on which the linear pattern is formed by the first sealing blade by gripping the gripping surface. The grid is provided on the gripping surface of the seal portion provided on the gripping surface of the pair of feed rolls transported in the transporting direction in units and formed with a linear pattern by the first sealing blade. A packaging machine that forms eye-shaped patterns .

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