JP2013112353A - Pillow package and folding line formation device for package film - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a package that can have end parts folded neatly.SOLUTION: There is provided a pillow package 2 formed by providing a center seal part 2c by sticking together both side edges of a package film made into a cylindrical bag, forming end seal parts 2a, 2b by thermally sealing both end openings in a direction crossing the center seal part, and folding the end parts including the end seal parts to the side of the center seal part. Folding lines 1d are provided along end seal parts only on a film surface positioned on a back surface side of the package having the end parts of the package film folded.

Description

  The present invention relates to a pillow package and a fold line forming apparatus for a packaging film, and more specifically, to a pillow package having a form in which an ear portion is tilted and an apparatus for manufacturing the pillow package.

  There are various types of packages, and one of them is a pillow package. The pillow wrapping machine for manufacturing this pillow wrapping body is continuously supplied with a belt-like film wound around a raw roll to a bag making machine, and is made into a cylindrical shape when passing through the bag making machine. The And a cylindrical film is formed by sealing the film superposition | polymerization end which was bag-formed and overlapped cylindrically through the bag making machine with the center seal apparatus arrange | positioned in the downstream of a bag making machine. In addition, a product transport / supply device is arranged on the upstream side of the bag making device, and products transported from the product transport / supply device at predetermined intervals are supplied into the bag making device. As a result, when the product passes through the bag making machine, the product is stored in the cylindrical film at predetermined intervals, and the product is conveyed together with the cylindrical film. Then, a pillow packaging body that encloses the product is manufactured by sealing and cutting the tubular film so as to cross the lateral direction at predetermined intervals in an end seal device arranged on the carry-out side of the pillow packaging machine. The

  In this pillow package, the product is wrapped with a cylindrical packaging film, and an appropriate position of the packaging film is sealed and sealed. Specifically, the seal part includes a center seal part (formed by the center seal device) that seals both side edges of the film along the cylindrical axial direction and seals and cuts the front and back in the lateral direction. Ear portions (formed by an end seal device (top seal device)).

  There is a demand to bend this ear. This is because the ear part protrudes in the horizontal direction in a normal packaging state, so that the outer shape of the package can be made substantially equal to the outer shape of the product by bending the ear part. This is because, for example, not only can the package (ear-folded) be easily packaged, but also can be stored using a small-capacity box. Further, by folding one ear part, the side where the ear part is bent may be a flat surface to be a bottom part, and the package may be able to stand up.

  In order to bend the ear part, the end part of the end seal device is bent independently of the end seal device or integrally with the end seal device, and the end portion is bent and separated from the tubular film. An ear fold device for performing processing is provided (see Patent Document 1, etc.).

Shokai Sho 58-55001

  However, the shape of the package and the types of packaging films to be used are diverse, and the folding by the ear folding device may not be able to be folded neatly at a desired position. Therefore, there is a problem that a sufficient effect due to the bending of the ear portion cannot be expected.

  In addition, the packaging body in which the ear part is folded by the ear folding device has a bad appearance and the product value is lowered without the boundary between the folded and fallen ear part and the main body side of the packaging body being a clean straight line. There is a problem that there is a risk of doing.

  In order to solve the above-described problems, the package of the present invention is (1) pasting both side edges of a cylindrically formed packaging film into a center seal portion, and in a direction intersecting with the center seal portion. In the pillow packaging body in which the opening at both ends is heat-sealed to form an ear portion, and at least one of the ear portions formed at both ends is folded and the ear is folded, the packaging film is positioned on the side opposite to the side on which the ear portion is to be folded. On the film surface that does not form a fold line along the ear portion, on the film surface that is positioned on the side where the ear portion of the packaging film is to be folded, a fold line is formed in at least a part of the section along the ear portion. Formed.

  The ear portion includes the end seal portion or the end seal portion and also includes an unsealed film portion on the main body side of the package. In short, the film portion where the tip end side of the packaging body provided with the end seal portion is folded and falls is the ear portion. The direction in which the ear portion is tilted may be on the center seal portion side or on the side where the center seal portion is not formed.

  A fold line is formed on the film surface on the side where the ears are brought down. Therefore, the film surface is bent along the fold line. And in the present invention, since the fold line is not formed on the film surface located on the opposite side to the side on which the ear is tilted, the fold lines do not interfere with each other and fight, and on the side opposite to the side on which the ear is tilted. The film surface located is bent following the folding along the fold line provided on the film surface located on the side where the ear is to be tilted. Therefore, the ear portion is beautifully bent along the fold line, and the crease is beautiful and becomes a package with high commercial value.

  As shown in (2), the fold line may be formed over the entire length (all sections) in the width direction of the film surface located on the side where the ears of the packaging film are folded down, or may be a part of the sections. Further, a fold line may or may not be formed at a site where a gusset is formed on the side surface of the package and the film surface is inward. In addition, the folding line is a continuous straight line in the embodiment, but it may be an intermittent pattern such as a dotted line. Furthermore, the fold line may be a groove formed in the sealant layer as described in (7), or may be a valley fold line with irregularities or other creases on the film.

  (2) It is good to form the said fold line in the full length along the ear | edge part of the said film surface to expose. Forming a fold line over the entire length in this way is preferable because it can be folded beautifully over the entire width of the package.

  (3) The fold line forming apparatus for packaging film according to the present invention is a fold line forming apparatus for packaging film that forms a fold line for an ear fold in the direction intersecting with the traveling direction of the belt-like film in the packaging machine, Fold line forming means for forming fold lines on both sides in the width direction orthogonal to the traveling direction of the belt-like film is provided. The folding line forming apparatus for packaging film corresponds to the fold forming part 80 for bending the ear part in the embodiment. This apparatus is suitable when the ear part is tilted to the film side provided with the center seal part.

  When a belt-like film is made into a cylindrical shape, both side portions in the width direction perpendicular to the traveling direction of the belt-like film constitute a film surface on which the center seal portion is formed, and the center portion in the width direction is not formed on the center seal portion. The film surface will be constructed. Therefore, if fold lines are formed on both sides, a predetermined fold line can be formed on the film surface on the center seal portion side. In addition, since the fold line in the same direction as the both side portions is not formed in the central portion, the fold line is not formed on the film surface on the side where the center seal portion is not provided.

  (4) The fold line forming means includes a pair of sandwiching blades that sandwich the belt-like film from both sides, and the tip of the sandwiching blade that faces the belt-like film has a portion that faces the central portion in the width direction of the belt-like film. It is good to become a recess and to be non-contact with the said strip | belt-shaped film. Simple configuration and only one set of clamping blades for forming fold lines on both sides. Of course, as an apparatus for realizing the invention of (3), an apparatus that includes a pair of sandwiching blades in which folding lines on both sides are separately formed is included.

  (5) The fold line forming apparatus for packaging film of the present invention is a fold line forming apparatus for packaging film that forms a fold line for an ear fold in the direction intersecting with the traveling direction of the strip film in the packaging machine. A fold line forming means for forming a fold line at the central portion in the width direction perpendicular to the traveling direction of the film was provided.

  (6) The fold line forming means includes a pair of sandwiching blades that sandwich the belt-like film from both sides, and a tip of the sandwiching blade that faces the belt-like film is a portion that faces a central portion in the width direction of the belt-like film. It is good to make it not touch and the both sides of the width direction of the strip | belt-shaped film.

  (7) The belt-like film may be configured by forming a heat sealable sealant surface on one side and a non-sealing surface on the opposite side, and forming the groove on the sealant surface.

  In addition, the said clamping blade is good to make it move to the same direction as a strip | belt-shaped film synchronizing with the movement of the strip | belt-shaped film in the state which pinched | interposed the said strip | belt-shaped film. If it does in this way, a belt-like film can be heated and pressurized for a certain period, conveying a belt-like film continuously, and it can supply to a packing machine main part at high speed, forming a fold line certainly.

  A plurality of sets of the sandwiching blades may be arranged so as to be movable along the transport direction of the belt-like film so that the distance between the adjacent sandwiching blades can be changed. It can be applied to a packaging machine for packaging bodies of different dimensions.

  In the present invention, since the fold line is provided on the film on the side where the ear is tilted, and the fold line is not provided on the opposite side, the film can be beautifully folded along the fold line so that the ear is clean. Can be defeated.

It is a front view which shows a part of strip | belt-shaped film supply apparatus with which the folding line forming apparatus for packaging films of 1st Embodiment was integrated. It is a figure which shows a 1st folding member and a 2nd folding member. It is a figure which shows the strip | belt-shaped film in which the fold line was formed. It is a figure which shows a package, (a) is the perspective view seen from upper direction, (b) is the perspective view seen from the downward | lower direction, (c) is a front view which shows the package after ear fold formation. It is a top view which shows 2nd Embodiment of the folding line formation apparatus for packaging films. It is the front view. (A) is a top view of the 1st clamping blade 86 and the 2nd clamping blade 87, (b) is a front view. It is a side view which shows 2nd Embodiment of the folding line formation apparatus for packaging films. It is the side view. It is a figure which shows an example of the shape of the 1st clamping blade provided in the front-end | tip of both 1st folding member, and the 2nd clamping blade provided in the front-end | tip of both 2nd folding member. It is a figure which shows an example of the shape of the 1st clamping blade provided in the front-end | tip of both 1st folding member, and the 2nd clamping blade provided in the front-end | tip of both 2nd folding member. It is a figure which shows the other example of the strip | belt-shaped film in which the fold line was formed. It is a figure which shows the state by which the strip | belt-shaped film was bag-formed in cylinder shape. It is a figure which shows the other example of the strip | belt-shaped film in which the fold line was formed. It is a figure which shows a package, (a) is the perspective view seen from upper direction, (b) is the perspective view seen from the downward | lower direction, (c) is a front view which shows the package after ear fold formation.

  FIG. 1 shows a part of an example of a film supply apparatus 10 in which a first embodiment of a folding line forming apparatus for packaging film according to the present invention is mounted. This film supply apparatus 10 is an apparatus that conveys the belt-like film 1 continuously drawn out from an original fabric roll installed on the upstream side, and supplies it to the next-stage pillow packaging machine body.

  The belt-like film 1 has a sealant surface (sealant layer) in which one surface (inner peripheral surface in the package) is melted by heating and the contact portions of the same surface are heat-sealed, and the other surface (in the package 34). The outer surface is a non-sealed surface (base film) that does not melt when heated.

  The film supply apparatus 10 includes a plurality of paths that define the paths for transporting the belt-like film 1 continuously drawn out from the raw roll through a predetermined transport path and leading it to a carry-in site (bag making machine) of the pillow packaging machine body. A free roller 11, first and second feed rollers 12, 13, a dancer roller 14, and an alignment roller 15 are provided. The strip-shaped film 1 is conveyed over these rollers.

  Furthermore, the film supply apparatus 10 includes a longitudinal film fold line forming apparatus 20 and a lateral film fold line forming apparatus 30 along the traveling direction of the belt-like film. The longitudinal film fold line forming device 20 is a device that forms fold lines in parallel (longitudinal direction) along the traveling direction of the belt-like film 1. Further, the longitudinal film fold line forming device 20 is arranged at three locations along the traveling direction of the belt-like film 1.

  Specifically, the longitudinal film fold line forming device 20 includes a large-diameter disk-shaped first brazing roller 21 disposed opposite to the belt-shaped film 1 and two small-diameter circular second brazing rollers. 22 is provided. The first brazing roller 21 and the second brazing roller 22 are respectively attached to a machine frame 23 that also serves as a bearing, and the respective brazing rollers 21 and 22 rotate. Further, two sets of the first and second brazing rollers 21 and 22 are provided at a predetermined distance in the width direction of the belt-like film 1.

  A fold line is formed in the contacted part by pressurizing the belt-like film while heating with the first and second brazing rollers 21 and 2 as a pair. Therefore, two parallel fold lines are formed by passing through one longitudinal film fold line forming apparatus 20. Further, the two vertical film fold line forming devices 20 in order from the upstream side form four mountain fold lines 1b at predetermined positions along the film traveling direction, and the third vertical film fold line forming device 20 is formed. Forms two valley fold lines 1c (see FIG. 3).

  The belt-like film 1 with the mountain fold line 1b and the valley fold line 1c attached at predetermined positions is guided to a bag making machine of the packaging machine body, and is passed through the bag to form a tubular film. At this time, the four mountain fold lines 1b are led to the four corners of the bag making machine to form a beautiful square tube shape. That is, as shown to Fig.4 (a), (b), it will be in the state where the four corners of the package 2 were sharply sharpened. Further, the valley fold line 1c is folded inward by a gusset forming device provided in the end seal device of the packaging machine body, so that the gusset is clearly formed on the side surface of the packaging body 2. The specific configuration of the longitudinal film fold line forming apparatus 20 can be realized by using a conventionally known device disclosed in, for example, Patent Document 1.

  The first feed roller 12 is disposed on the downstream side of the three longitudinal film fold line forming devices 20 and rotates by receiving a driving force from a driving motor (not shown). The rotational force of the first feeder 12 is transmitted to the strip film 1, and the strip film 1 is drawn out continuously.

  A second feeder 13 is arranged below the first feeder 12. The second feed roller 13 is also rotated by receiving a driving force from a driving motor (not shown in FIG. 1) (not the driving motor of the first feed roller 12), and is applied to the belt-like film 1 stretched around the second feed roller 13. To give conveyance power. The transverse film fold line forming device 30 is disposed between the feed rollers 12 and 13. Both drive motors rotate synchronously so that the belt-like film 1 passing through the transverse film fold line forming device 30 is conveyed in a tensioned state.

  The dancer roller 14 is disposed between the first feeder 12 and the lateral film fold line forming device 30. The dancer roller 14 is linked to the air cylinder, and is urged to the right side in the figure with respect to the belt-like film 1 stretched by the pressure of the air cylinder. A predetermined tension is applied to the belt-like film 1 by this urging force, and the belt-like film 1 between the feed rollers 12 and 13 can be maintained in a tight state.

  Further, in the present embodiment, the pressure of the air cylinder is adjusted in accordance with the operation of the lateral film fold line forming device 30. That is, as will be described later, when the fold line is formed in the lateral direction with respect to the strip film 1 by the lateral film fold line forming device 30, the pressure is set to a low pressure when the strip film 1 is sandwiched, and the high pressure is controlled in a normal state. Thereby, the belt-like film 1 is folded at the time of fold line formation, and the film portion of the belt-like film 1 located in the lateral film fold line forming device 30 is drawn toward the lateral film fold line forming device 30 side from the first feeder 12. In addition, by making the cylinder pressure low, it is possible to draw the belt-like film 1 and to prevent the belt-like film 1 from being applied with a larger tension than necessary. Thereby, without changing the full length of the strip | belt-shaped film 1 between both the feed rollers 12 and 13, and a tension | tensile_strength are fixed, the state tensioned with the desired tension can be maintained.

  The lateral film fold line forming device 30 is provided in the middle of the conveyance path along which the strip film 1 moves downward in the vertical direction. The lateral film fold line forming apparatus 30 includes a first fold member 31 and a second fold member 32 that are disposed to face each other with the belt-like film 1 interposed therebetween. As described above, the belt-like film 1 used in this embodiment has a sealant surface (sealant layer) that melts by heating and a non-seal surface (base film) that does not melt even when heated. Since the non-sealing surface is finally located on the front side of the package, it is also referred to as a surface. On the other hand, the sealant surface is finally located inside the package, and the non-seal surface is also referred to as the back surface in combination with the front surface. Therefore, the first fold member 31 is disposed so as to face the sealant surface, and the second fold member 32 is disposed so as to face the non-seal surface.

  As shown in an enlarged view in FIG. 2, the first fold member 31 and the second fold member 32 of this embodiment both have rectangular main bodies 31b and 32b, and the opposing surfaces of the main bodies 31b and 32b. A first sandwiching blade 36 and a second sandwiching blade 37 are integrally formed at both upper and lower ends. And the 1st clamping blade 36 and the 2nd clamping blade 37 match | combine the front-end | tip, and it braces on the strip | belt-shaped film 1 along the front-end | tip shape, and forms a fold line. In the present embodiment, the first clamping blade 36 has three peaks (two valleys) up and down, the second clamping blade 37 has two peaks (one valley) up and down, and the peaks and valleys coincide with each other. It has a shape that fits together. Each peak / valley is formed so as to extend in a direction orthogonal to the traveling direction of the belt-like film 1. Furthermore, the lateral width of the first folding member 31 and the second folding member 32 (the lateral width of the surface facing the strip film 1: the direction orthogonal to the traveling direction of the strip film 1) is the lateral width of the strip film 1 (the strip film). The length of the belt-like film 1 is longer than the length of 1 in the direction perpendicular to the traveling direction, so that a fold line can be formed over the entire length of the belt-like film 1.

  The first folding member 31 has holes 31a extending in the lateral direction (direction orthogonal to the traveling direction of the belt-like film 1) at positions near the opposing surfaces of the upper and lower ends of the main body 31b. A heater 34 is inserted into the hole 31a. The heater 34 is energized and heated to heat the main body 31b of the first metal folding member 31 and thus the first clamping blade 36. The heating temperature at this time is set to a higher temperature (for example, 150 ° C.) than a conventional folding line forming apparatus using a rotating roller. This heating temperature is a temperature at which the sealant layer is softened or melted.

  On the other hand, the second folding member 32 has a hole 32a extending in the lateral direction (direction perpendicular to the traveling direction of the belt-like film 1) in the vicinity of the opposed surfaces of the upper and lower ends of the main body 32b. A heater 35 is inserted and installed in the hole 32a. By energizing and heating the heater 35, the main body of the second metal folding member 32 and thus the second clamping blade 37 are heated. The heating temperature at this time is set to a temperature (for example, 120 to 130 ° C.) that is higher than that of the conventional folding line forming apparatus but lower than that of the first folding member 31 side.

  The first crease member 31 and the second crease member 32 approach / separate and move up and down while maintaining a state in which their opposing surfaces are opposed to each other. That is, the first fold member 31 and the second fold member 32 rotate and move in synchronization with a locus indicated by a two-dot chain line in FIG. Specifically, the first sandwiching blade 36 and the second sandwiching blade 37 come in contact with each other at the upper position, move downward while remaining in contact with each other, and then move upward while separating. Such an operation is performed by a drive mechanism 33 such as a cam mechanism, and can be realized by the same type of drive mechanism in a so-called box motion type end seal device mounted on the packaging machine body.

  And the strip | belt-shaped film 1 because the 1st clamping blade 36 and the 2nd clamping blade 37 approach and correspond in the state in which the strip | belt-shaped film 1 intervened between the 1st folding fold member 31 and the 2nd folding fold member 32. Is pressed at a desired pressure by both sandwiching blades 36 and 37. In this state, the sandwiching blades 36 and 37 move downward, so that the pressed state of the belt-like film 1 continues for a certain time. And the applied pressure at the time of this clamping is set to a pressure smaller than that of the conventional folding line forming apparatus. Here, the small pressure is such that the band-shaped film is not damaged when sandwiched and pressurized.

  Furthermore, when the strip film 1 is sandwiched between the first sandwiching blade 36 and the second sandwiching blade 37, the tip of the first sandwiching blade 36 heated at a high temperature heats and melts the sealant layer of the strip film 1. At this time, the non-sealed surface (base film) of the belt-like film 1 is not melted or deformed even by heating and pressurization by the second clamping blade 37. Therefore, the film portion sandwiched between the both sandwiching blades 36 and 37 melts the sealant layer, and a groove is formed in the sealant layer. Therefore, the thickness of the sandwiched film part is thinner than other film parts, and the film part is easily bent at the part where the groove is formed. Therefore, the sandwiched film part becomes a fold line. And since the state which pinched | interposed and pressed the strip | belt-shaped film 1 with both clamping blades 36 and 37 can be ensured for a fixed time, with respect to the strip | belt-shaped film 1 along the outer shape of both the clamping blades 36 and 37 reliably, even with a small pressure, A fold line can be formed in the lateral direction.

  In the present embodiment, the first sandwiching blades 36 provided above and below the first folding fold member 31 and the second sandwiching blades 37 provided above and below the second folding fold member 32 cause the traveling direction of the belt-like film 1. Two folding lines 1a and 1a 'extending in the orthogonal direction are formed simultaneously at a predetermined interval in the front-rear direction (see FIG. 3A). The two folding lines 1a and 1a ′ are formed by the lower first clamping blade 36 and the second clamping blade 37 to form the folding line 1a ′, and the upper first clamping blade 36 and the second clamping blade 37 are connected to each other. As a result, a fold line 1a is formed. Then, the film portion between the two folding lines 1a and 1a 'formed at the same time is end-sealed (end seal portions 2a and 2a') in the subsequent packaging machine body. That is, the folding line 1a of one package and the folding line 1a 'of another package are formed simultaneously.

  The lateral film fold line forming apparatus 30 is mounted with a fold forming portion 80 for bending the ears, which is a main part of the present invention. The ear folding fold forming portion 80 includes an upper first ear fold member 81 and a lower first ear fold member 82 connected to the upper and lower sides of the main body 31b of the first fold member 31; An upper second ear fold member 83 and a lower second ear fold member 84 connected to the top and bottom of the main body 32b of the two fold member 32 are provided. A set of an upper first ear fold member 81 and an upper second ear fold member 83 provided on the upper side, a lower first ear fold member 82 and a lower second ear provided on the lower side. The band-like film 1 is sandwiched by the set of partial folding member 84, and a folding line (folding) 1d is formed at the sandwiched portion.

  The upper first ear fold member 81 and the lower first ear fold member 82 have the same structure in this embodiment. That is, the first ear fold members 81, 82 adopt a configuration in which the first clamping blade 86 is mounted on the upper and lower surfaces of the main body 31 b of the first fold member 31 via the spacer 90 and fixed by the bolt 91. . Both the second ear fold members 83, 84 adopt a configuration in which the second clamping blade 87 is attached to the upper and lower surfaces of the main body 32 b of the second fold member 32 via the spacer 92 and fixed with the bolts 93. The spacers 90 and 92 are made of metal or other member having good thermal conductivity. Therefore, since the temperature of the main body 31b heated by the heater 34 is transmitted to the first clamping blade 86 through the spacer 90, the tip of the first clamping blade 86 that contacts the belt-like film 1 also has a high temperature. Moreover, since the heat of the main body 32b heated by the heater 35 is transmitted through the spacer 92 in the second clamping blade 87, the tip of the second clamping blade 87 that contacts the belt-like film 1 also has a high temperature. However, in this embodiment, since the temperature of the heaters 34 and 35 is changed, the temperature of the first clamping blade 86 that contacts the sealant layer (back surface) is the second clamping that contacts the film base (front surface). The temperature becomes higher than the temperature of the blade 87.

  The tip of the first clamping blade 86 is tapered and has one peak projection 86a. The tip of the projection of the second clamping blade 87 is tapered, and a concave groove 87a is provided at the tip. The protrusions 86a and the concave grooves 87a coincide when the first clamping blade 86 and the second clamping blade 87 approach each other, and sandwich and pressurize the belt-like film 1 disposed therebetween. Thereby, the site | part pinched by both the clamping blades 86 and 87 is creased and creased along the shape of the protrusion 86a and the concave groove 87a. This operation principle / action is the same as that of the fold line brazing in the lateral film fold line forming apparatus 30, and a groove is formed in a portion of the sealant layer (back surface) that contacts the first sandwiching blade 86. And since it becomes easy to bend | fold at the part by forming a groove | channel, it becomes a fold line.

  Further, the protrusion 86a and the concave groove 87a are formed so as to extend in a direction orthogonal to the traveling direction of the strip film 1, but the first clamping blade 36 and the second clamping pin in the first folding member 31 and the second folding member 32. Unlike the peaks and valleys provided at the tip of the blade 37, it is not provided over the entire width of the strip film 1, but is formed only on both sides. That is, the projection 86a. Without forming the concave groove 87a, the belt-shaped film 1 is brought into non-contact as a concave portion (notch) withdrawn one step from the tip position. Thereby, the fold line 1d is formed on both sides of the belt-like film 1 as shown in FIG.

  At this time, the width dimension (for example, 60) of a recessed part is good to make it wider than the width dimension (for example, 50) of a package. If it does in this way, even if a strip | belt-shaped film meanders, the folding part 1d does not appear on the front side of the package body 2.

  In the present embodiment, the spacers 90 and 92 are equal in thickness, and the distances from the upper and lower surfaces of the main bodies 31b and 32ba to the first clamping blade 86 and the second clamping blade 87 are equal in the vertical direction. As a result, the distances from the adjacent folding lines 1a, 1a 'to the respective folding lines 1d become equal.

  FIG. 4 (a) shows a case where folding lines 1a, 1a ′, 1b, 1c, and 1d are formed at predetermined positions of the belt-shaped film 1 using the apparatus of the present invention, and then the end seal device of the pillow packaging machine body at the subsequent stage is used as the end seal device. The perspective view which looked at the package (intermediate package) after performing the sealing process from the upper part is shown. FIG. 4B shows a perspective view of the intermediate package viewed from below. FIG. 4C is a front view showing a package manufactured by bending the end seal portions 2a and 2a ′ (also referred to as ear portions) with an ear folding device.

  As described above, the mountain fold line 1b makes the four corners stand up, and the valley fold line 1c forms a clean gusset on the side surface of the package 2 and folds the package 2 inside. is there. And since the folding line 1d is formed only on both sides of the band-like film 1 by the fold forming part 80 for folding the ear part and no fold line is formed in the central part of the band-like film 1, FIG. As apparent from (b), in the package 2, a fold line 1d is formed only on the lower surface (back surface) side of the package body 2 on which the center seal portion 2c is formed, and the fold line is formed on the upper surface (front surface) side. 1d is not formed. Further, a fold line 1d is formed on the entire back side in the width direction.

  Therefore, when the end seal portions 2a and 2b are urged to be bent by the ear folding device provided at the rear stage of the end seal device, the portion of the fold line 1d is bent beautifully. Therefore, the end seal portions 2a and 2b (ear portions) are bent at a position parallel to the formation region of the end seal portions 2a and 2b and entering the inside of the package by a predetermined distance from the boundary between the end seal portions 2a and 2b. . At this time, since the folding line 1d is not provided on the front side of the packaging body 2, the process of bending the end seal portions 2a and 2b so that the tips of the end seal portions 2a and 2b are located below the packaging body 2 is performed smoothly and cleanly. . That is, if the fold line 1d is formed over the entire width in the width direction of the belt-like film 1, fold lines are also formed along the end seal portions 2a and 2b on the front side of the package 2. Then, the fold line of the valley fold line is formed along the end seal portions 2a and 2b on the front side, and the fold line guides the bending in the direction opposite to the direction of the ear fold. Cannot be folded into. On the other hand, by forming the fold line 1d only on the lower side of the package (the side on which the center seal portion 2c is formed) as in the present embodiment, only the one that acts in the direction of guiding the ear folding process. So you can fold your ears cleanly.

  As this ear folding device, for example, the one disclosed in Japanese Utility Model Laid-Open No. 58-55001 can be used. When the apparatus is schematically shown, a pair of upper and lower folding plates 5 that move up and down are arranged as shown by a two-dot chain line in FIG. 4C, and the pair of folding plates 5 are attached to the end seal portions 2a and 2b. The film is folded by sandwiching a predetermined film portion (formation position of the folding line 1d) along the top and bottom. The ear folding device may be formed integrally with the end seal device or may be formed separately.

  Further, in the present embodiment, the vertical film fold line forming device 20 forms valley fold lines and mountain fold lines at appropriate positions by being sandwiched by brazing rollers, but in the sealant layer similarly to the fold lines 1a and 1d. It is good also as what forms the fold line which becomes easy to bend | fold by attaching a groove | channel.

  5 to 9 show a second embodiment. In the first embodiment described above, the first folding bar member 31 is provided with the two first clamping blades 36 integrally, and the second folding bar member 32 is provided with the two second clamping blades 37 integrally. The distance between the two folding lines 1a and 1a 'was fixed. On the other hand, the transverse film fold line forming apparatus 30 'of the present embodiment can change the interval between the two fold lines 1a and 1a'.

  Specifically, the upper first fold member 41 and the lower first fold member 42 are vertically separated so as to be moved up and down, and a first clamping blade 47 is provided at the tip of each first fold member 41, 42. It is formed integrally. Similarly, the upper second folding bar member 43 and the lower second folding bar member 44 are separately arranged in the vertical direction, and a second clamping blade 48 is integrally formed at the tip of each of the second folding bar members 43 and 44.

  Accordingly, as shown in FIG. 6 and the like, the upper first ear fold member 81, the lower first ear fold member 82, and the upper second ear portion constituting the fold forming portion 80 for bending the ear portion. The folding member 83 and the lower second ear folding member 84 are also provided on the separately disposed upper and lower first folding members 41 and 42 and the upper and lower second folding members 43 and 44, respectively. did.

  That is, the upper first ear fold member 81 has a configuration in which the first clamping blade 86 is attached to the upper surface of the upper first fold member 41 via the space 90 and fixed by the bolt 91. The lower first ear fold member 82 has a configuration in which a first clamping blade 86 is attached to the lower surface of the lower first fold member 42 via a space 90 and fixed by a bolt 91. The upper second ear crease member 83 has a configuration in which a second clamping blade 87 is attached to the upper surface of the upper second crease member 83 via a spacer 92 and fixed with a bolt 93. The lower second crease member 84 has a configuration in which a second clamping blade 87 is attached to the upper surface of the lower second crease member 84 via a spacer 92 and fixed with bolts 93.

  Thereby, each ear | edge part folding member 81-84 raises / lowers integrally with the folding member 41-44 with which each was mounted | worn. As the first folding member 41, 42 and the second folding member 43, 44 approach each other, the first sandwiching blade 86 and the second sandwiching blade 87 also approach, and a predetermined portion of the belt-like film 1 is moved. It is the same as that of 1st Embodiment to form a fold line by inserting | pinching.

  FIG. 7A shows a plan view of the first clamping blade 86 and the second clamping blade 87, and FIG. 7B shows a front view thereof. As shown in the figure, the first clamping blade 86 and the second clamping blade 87 are each provided with a protrusion 86a and a concave groove 87a on both sides, and the central portion forms concave portions 86c and 87c that are recessed one step from the tip position.

  The lower first folding member 42 is attached to the base 51. The upper first folding member 41 is attached to a moving base 52 attached to the base 51 so as to be movable up and down. Therefore, by moving the moving base 52 up and down with respect to the base 51, the upper first folding member 41 is lifted or lowered relative to the lower first folding member 42 so that both first folding members are folded. The distance between the collar members 41 and 42 can be changed. Further, the moving table 52 is linked to a long hole 51b formed along the pillar portion 51a projecting upward at both ends of the upper surface of the base 51 at both ends thereof, and can move up and down along the long hole 51b. Then, by fastening the fixing screw 56, the movable base 52 and, therefore, the upper first folding member 41 are fixed at a desired height position.

  The upper first folding member 41 can move in a horizontal direction with respect to the moving base 52 and the lower first folding member 42 with respect to the base 51 in a horizontal direction. That is, one end of the slide guide shaft 55 is connected to each of the upper first folding member 41 and the lower first folding member 42. The slide guide shaft 55 is disposed so as to penetrate the first folding member 41, 42 in the horizontal direction and is movable in the axial direction. Therefore, both the first folding member 41, 42 is guided by the slide guide shaft 55 and moves in the horizontal direction, that is, moves toward and away from both the second folding member 43, 44 (band-like film 1). Further, the first folding member 41, 42 is in contact with the tip of a coil spring 54 accommodated in the movable base 52 and the base 51, and the second folding member 43, It is urged toward 44 (band-like film 1). Further, the elastic restoring force of the coil spring 54 is adjusted by tightening or loosening the pressure adjusting screw 53 so that the pressure when the band-shaped film 1 is sandwiched can be changed. Such a horizontally moving mechanism can be configured similarly in the first embodiment.

  Further, cam floors 49 are attached to the outer sides of both ends of the base 51, and cam grooves (not shown) of cams (not shown) on the outer sides of the cam floors 49 are disposed on the outer sides of the cam floors 49. ) To become a cam mechanism. Then, by rotating the cam mechanism with a known drive mechanism, the base 51 (lower first folding member 42) and the movable table 52 (upper first folding member 41) linked thereto are moved to a predetermined locus. To revolve around.

  Similarly, the lower second folding member 44 is attached to the base 61 using a fixing screw 63. Then, the upper second folding member 43 is attached to a moving base 62 that is attached to the base 61 so as to be movable up and down using a fixing screw 63. Therefore, by moving the moving base 62 up and down relative to the base 61, the upper second folding fold member 51 is raised or lowered relative to the lower second folding fold member 52, so The distance between the eaves members 43 and 44 can be changed.

  Furthermore, the 1st clamping blade 47 is integrally formed in the front-end | tip at the front-end | tip of the upper 1st folding member 41 and the lower 1st folding member 42, respectively. In addition, a second sandwiching blade 48 is integrally formed at the distal ends of the upper second folding member 43 and the lower second folding member 44, respectively. The tips of the first clamping blade 47 and the second clamping blade 48 coincide with each other, and are rubbed onto the belt-like film 1 along the tip shape to form a fold line. In the present embodiment, as shown in an enlarged view in FIG. 10A, the first clamping blade 47 has three peaks (two valleys) up and down, and the second clamping blade 48 has two peaks (1 Two valleys), and each mountain and valley coincide with each other. Each peak / valley is formed so as to extend in a direction orthogonal to the traveling direction of the belt-like film 1. Furthermore, the lateral width of the first folding member 31 and the second folding member 32 (the lateral width of the surface facing the strip film 1: the direction orthogonal to the traveling direction of the strip film 1) is the lateral width of the strip film 1 (the strip film). The length of the belt-like film 1 is longer than the length of 1 in the direction perpendicular to the traveling direction, so that a fold line can be formed over the entire length of the belt-like film 1.

  Further, holes 41a and 42a extending in the lateral direction (direction orthogonal to the traveling direction of the belt-like film 1) are provided in the vicinity of the tips of the first folding members 41 and 42, and the heater 45 is provided in the holes 41a and 42a. Inserted and installed. By energizing and heating the heater 45, both the first metal folding members 41 and 42 and thus the first sandwiching blade 47 are heated.

  Further, hole portions 43a and 44a extending in the lateral direction (direction perpendicular to the traveling direction of the belt-like film 1) are provided in the vicinity of the tips of the second folding member members 43 and 44, and the heater 46 is provided in the hole portions 43a and 44a. Inserted and installed. By energizing and heating the heater 46, the metal second folding member 43, 44 and the second clamping blade 48 are heated. Since other configurations and operational effects are the same as those of the first embodiment described above, detailed description thereof is omitted.

  A first clamping blade provided at the tip of the upper first folding member 41 and the lower first folding member 42, or a second clamping blade provided at the tip of the upper second folding member 43 and the lower second folding member 44 The shape is not limited to that of the above-described embodiment, and can take various forms. As an example, there are those shown in FIGS. 10B and 10C and FIG. That is, as shown in FIG. 10 (b), the first clamping blade 61 is a ridge of one mountain, and the second clamping blade 62 is a concave groove corresponding thereto. As shown in FIG. 10 (c), the first sandwiching blade 63 and the second sandwiching blade 64 are both projecting protrusions and have a target shape. Form a line.

  As shown in FIG. 11A, the first clamping blade 65 may be a protrusion having a narrow and sharp tip, and the second clamping blade 66 may be a concave groove wider than the vertical thickness of the first clamping blade 65. . As shown in FIG. 11 (b), both the first clamping blade 67 and the second clamping blade 68 may be protrusions having tips that are narrow and pointed. Furthermore, as shown in FIG. 11 (c), the first clamping blade 69 may be formed as a single ridge projection, and the second clamping blade 70 may have a shape in which a concave groove is formed at the tip of the projection.

  Further, the shapes shown in FIGS. 10 and 11 show an example, and other shapes may of course be used. Moreover, although FIG. 10, FIG. 11 presupposes 2nd Embodiment isolate | separated up and down, of course, it is good also to apply a 1st clamping blade and a 2nd clamping blade to 1st Embodiment.

  Further, the shape of each of the sandwiching blades shown in FIGS. 10 and 11 is such that the first ear folding members 81 and 82 and the second ear folding members 83 and 84 of the ear folding fold forming portion 80 are clamped. It can also be applied as a blade.

  In each embodiment, the thicknesses of the spacers 80 and 92 are equal, and the distances from the upper and lower surfaces of the main bodies 31b and 32ba to the first clamping blade 86 and the second clamping blade 87 are equal in the vertical direction but are different. Also good.

  Although the package of this embodiment is formed with gussets and three longitudinal film fold line forming devices 20 are arranged, the present invention is not limited to this, and there may be no gussets. In that case, although a vertical film fold line forming apparatus is involved, an apparatus for forming a valley fold line for forming a zet is not necessary. Furthermore, it is not essential to make the four corners of the package 2 sharply pointed, and such edges may be eliminated. In that case, the longitudinal film fold line forming apparatus 20 for forming a mountain fold line at a portion corresponding to the four corners of the package becomes unnecessary.

  The same applies to the lateral film fold line forming apparatus 30. Furthermore, although the fold line 1d for folding the ears is provided along both the end seal portions 2a and 2b, only one of them may be provided. In that case, what is necessary is just to provide 1 set of 2nd ear part fold members and 1st ear fold members.

  In the above-described embodiment, the folding lines 1d provided on both sides of the belt-like film 1 are formed up to the left and right ends, respectively, but the present invention is not limited to this, for example, as shown in FIG. (Side) forms a fold line 1d to the end edge, and the other (B side) forms a fold line 1d 'so as to end inward by a predetermined distance from the end edge. This predetermined distance is preferably the width of the center seal portion. That is, the belt-like film 1 is formed into a cylindrical shape by passing through the bag making machine of the packaging machine body, and film portions 1 'and 1' having predetermined widths on both side edges are overlapped with each other (FIG. 13). The end is sealed by a center seal device to form a center seal portion. This center seal part is brought down to one side in the final package. If it is tilted to the B side in FIG. 13, when the ear is tilted, the B-side film part 1 'bends in the opposite direction to the A-side film part 1' or the film part outside the center seal part. . In view of this, the fold line is not formed in the film portion on the side where the center seal portion is tilted (B side) so that the ear portion can be beautifully folded.

  FIG. 14 shows still another pattern of folding lines formed on the belt-like film. FIG. 14 differs from the above-described various embodiments and modifications in that a fold line 1d ″ is formed in the center of the belt-like film 1. As a result, the fold line 1d ″ is formed as shown in FIG. The package is formed on the film surface side where the center seal portion 2c is not formed. In this case, the ear portion is suitable for a packaging body configured to be tilted to the side where the center seal portion is not formed.

  In each embodiment and the modification, the pair of sandwiching blades perform a box motion operation. However, when the strip film is moved intermittently, it does not move in the transport direction of the strip film, but at the same position. It is good also as a structure which approaches and separates by.

  Furthermore, a pair of rotating blades are arranged on the pair of rotating shafts arranged with the band-shaped film interposed therebetween, and each time the rotating shaft makes one rotation, the tip of the pair of holding blades presses the band-shaped film to form a fold line. You may make it do. In this case, for example, the sandwiching blade may have a concave portion at the center as shown in FIG. 7, or a plurality of sandwiching blades may be attached to one rotating shaft.

DESCRIPTION OF SYMBOLS 1 Strip | belt-shaped film 10 Film supply apparatus 30,30 'Lateral direction film fold line formation apparatus 31 1st folding member 32 Second folding member 34 Heater 35 Heater 36 First clamping blade 37 Second clamping blade 41 Upper first folding sheet Member 42 Lower first folding member 43 Upper second folding member 44 Lower second folding member 45 Heater 46 Heater 47 First clamping blade 48 Second clamping blade 80 Ear folding fold forming portion 81 Upper first One ear fold member 82 Lower first ear fold member 83 Upper second ear fold member 84 Lower second ear fold member 86 First holding blade 87 Second holding blade

Claims (7)

The side edges of the packaging film made into a cylindrical shape are bonded together to form a center seal portion, and both ends in the direction intersecting the center seal portion are heat-sealed to form ear portions and formed at both ends. In the pillow package that has folded at least one of the ears,
On the film surface located on the side opposite to the side where the ear part of the packaging film is tilted, without forming a fold line along the ear part, on the film surface located on the side where the ear part of the packaging film is tilted, A pillow package characterized in that a fold line is formed in at least a part of the section along the ear.   The pillow package according to claim 1, wherein the fold line is formed over the entire length of the exposed film surface along the ear. A fold line forming device for a wrapping film that forms a fold line for an ear crease in a direction intersecting with a traveling direction of a belt-like film in a packaging machine,
A fold line forming device for packaging film, comprising fold line forming means for forming fold lines on both sides in the width direction perpendicular to the traveling direction of the belt-like film. The fold line forming means includes a pair of sandwiching blades that sandwich the belt-like film from both sides,
The tip of the sandwiching blade that faces the belt-like film is configured such that a portion facing the central portion in the width direction of the belt-like film becomes a recess and is not in contact with the belt-like film. The fold line forming apparatus for a packaging film as described. A fold line forming device for a wrapping film that forms a fold line for an ear crease in a direction intersecting with a traveling direction of a belt-like film in a packaging machine,
A fold line forming apparatus for a packaging film, comprising a fold line forming means for forming a fold line at a central portion in a width direction perpendicular to the traveling direction of the belt-like film. The fold line forming means includes a pair of sandwiching blades that sandwich the belt-like film from both sides,
The tip of the sandwiching blade facing the belt-like film is such that the portion facing the central portion in the width direction of the belt-like film is in contact with both sides of the belt-like film in the width direction. The fold line forming apparatus for a packaging film according to claim 5. The belt-like film has a sealant surface that can be heat-sealed on one side and a non-seal surface on the opposite side,
The fold line forming apparatus for a packaging film according to any one of claims 3 to 6, wherein the fold line is formed by forming a groove on the sealant surface.

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