JP2008189332A - Heat sealing device and packaging apparatus having the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat sealing device capable of forming satisfactory seals in order to ensure the airtightness of a bag regardless of the characteristics of a packaged item, and to provide a packaging apparatus having the heat sealing device. <P>SOLUTION: A bag forming-and-packaging machine 1 includes a front sealing jaw 51A, a rear sealing jaw 51B, and projections 61. The front sealing jaw 51A has tooth grooves 60A formed in its heating face. The rear sealing jaw 51B has tooth grooves 60B engaged with the tooth grooves 60A of the front sealing jaw 51A when film F is sandwiched by the front sealing jaw 51A and this sealing jaw 51B. The projections 61 are disposed on faces forming at least the tooth grooves 60A of the front sealing jaw 51A or the tooth grooves 60B of the rear sealing jaw 51B. The front sealing jaw 51A and rear sealing jaw 51B project across and opposite each other. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a heat sealing device that heat seals an end portion of a thermoplastic packaging body and packages a product, and a packaging device including the heat sealing device.

  BACKGROUND ART A bag making and packaging machine is provided as a packaging device that fills an inside of a bag with an article to be packaged such as a snack while making the bag while making the bag.

  For example, in a bag making and packaging machine called a pillow packaging machine, a sheet-like film sent out from a film roll as a thermoplastic packaging body is formed into a cylindrical shape by a former and a tube, and is brought into contact with a heater belt of a vertical sealing mechanism. The vertical edges on which the cylindrical films are stacked are heat-sealed (heat-sealed) to form a cylindrical film. And after filling the packaged material from the tube inside the tubular film that will eventually become a bag, and heat-sealing across the upper end of the bag and the lower end of the subsequent bag by a horizontal sealing mechanism below the tube, The center of the heat seal portion (lateral seal portion) is cut with a cutter.

  In a product produced by such a bag making and packaging machine, the quality of the seal part in the package causes the packaged object to be oxidized or spoiled. Accordingly, various proposals have been made as measures against air leaks (gas leaks) in order to increase the confidentiality inside the bag.

For example, Patent Document 1 discloses a sealing device in which a pair of sealing jaws are provided with portions that are raised in a direction facing each other. According to this, by increasing the pressure applied to the film, it is possible to form a good seal state in which airtightness is ensured.
Special table 2006-502920 (announced on January 26, 2006)

  However, the conventional sealing device has the following problems.

  That is, in the case of a film characteristic, for example, a film having a thin sealant layer, it was not possible to prevent air leakage only by increasing the pressure at the seal portion. Therefore, a method of securing confidentiality by melting a cut end using a fusing knife (hot knife) that cuts by melting a film has been generally performed. However, this method is costly and has a problem that perforated continuous bags cannot be produced.

  An object of the present invention is to provide a heat sealing device capable of forming a good sealing state for ensuring airtightness in a bag regardless of the characteristics of the package, and a packaging device including the heat sealing device. is there.

  The heat sealing device according to the first invention is arranged so as to sandwich a film conveyance path for wrapping a product, and the film is sandwiched between a pair of sealing members having heating surfaces opposed to each other. It is the heat sealing apparatus which seals a part of this, Comprising: The 1st sealing member, the 2nd sealing member, and the convex part are provided. The first seal member has a groove formed on the heating surface. The second seal member has a groove portion that engages with the groove portion on the first seal member side when the film is sandwiched together with the first seal member. The convex portion is disposed on at least one heating surface of the first seal member or the second seal member, and protrudes in a direction intersecting the direction in which the first seal member and the second seal member face each other.

  Here, a convex portion protruding in a direction intersecting the direction in which the first seal member and the second seal member face each other is disposed on at least one heating surface of the first seal member or the second seal member.

  Here, the direction in which the first seal member and the second seal member intersect with each other is a direction in which the first seal member and the second seal member intersect with each other in order to sandwich the film. However, it includes a direction substantially parallel to the film transport direction.

  Conventionally, it has been generally performed to provide a highly airtight seal by providing a change in the height of a groove portion, that is, a direction in which the seal members face each other on the surfaces where the seal members face each other, and increasing the pressure. However, when sealing is performed by increasing the pressure on the thin film of the sealant layer as described above, the film is cut along the width direction of the film. For this reason, when wrapping goods with a thin film, the above conventional method cannot be adopted, and a method of securing airtightness by welding the cut end using a fusing knife is adopted. Had to do.

  Therefore, in the present invention, a convex portion that protrudes in a direction intersecting the direction in which the first seal member and the second seal member face each other is provided on at least one heating surface of the first seal member or the second seal member. ing. In other words, the convex part which protrudes in the substantially parallel direction with respect to the conveyance direction of a film is provided.

  As a result, a film having a thin sealant layer (hereinafter referred to as a thin film) and a general film having a thin sealant layer that is not thin, that is, a film that cannot be cut by pressure due to engagement of a groove (hereinafter referred to as a thick film) In contrast, the convex portion has the following effects.

  For thin films, by providing the convex portions, the apex portions of the groove portions where the seal members face each other can be planarized, so that the pressure due to the engagement of the groove portions can be relieved. For this reason, a part of the film that comes into contact with the seal member at the position where the convex portion is provided is not cut and is not completely cut along the width direction of the film. In addition, a part of the film that comes into contact with the seal member at a position where there is no convex portion is cut because it comes into contact with the apex portion of the groove, but a high airtightness can be sealed by a fusing effect by welding. That is, it is possible to cut a part along the width direction of the film and to provide a highly airtight seal by the fusing effect of that part.

  On the other hand, since the contact area between the film and the heating surface of the seal member can be increased by providing the convex portion for a thick film, the area of the seal portion can be increased when the groove is engaged. Become. For this reason, a favorable sealing state can be formed, and it becomes possible to give a highly airtight seal. That is, in the heat sealing apparatus of the present invention, it is possible to provide a highly airtight seal for both a thin film and a thick film.

  As a result, regardless of the characteristics of the package, it is possible to form a good sealed state for ensuring airtightness in the bag.

  A heat sealing device according to a second invention is the heat sealing device according to the first invention, and the heating surfaces of the first seal member and the second seal member are engaged with each other when the film is sandwiched therebetween. A groove portion is formed, and the convex portion is disposed on a surface forming the groove portion.

  Here, the heating surfaces of the first seal member and the second seal member are formed with, for example, a tooth groove-shaped groove portion that engages with each other when the film is sandwiched, and the convex portion forms the groove portion. Arranged on the surface.

  Thereby, regardless of the characteristics of the package, it is possible to perform a highly airtight seal at the seal portion. In addition, if the surface on which the groove is formed is oblique with respect to the film transport direction, it is possible to easily form a convex portion that protrudes in a direction intersecting the direction in which the first seal member or the second seal member sandwiches the film. It becomes possible.

  When providing a convex portion on the surface on which the groove portion is formed, if the convex portion is provided adjacent to the apex of the groove portion protruding in the direction of sandwiching the film, the effect of relieving the pressure due to the engagement of the groove portion is large. Become. Moreover, when a convex part is provided in the position away from the vertex of the said groove part, the effect which increases the area of the seal part at the time of engagement of a groove part becomes large.

  A heat sealing device according to a third aspect of the present invention is the heat sealing device according to the first or second aspect of the present invention, wherein the convex portion is arranged at a position where three or more films are overlapped.

  Here, the convex portion formed on the surface of the groove portion is, for example, a position where three or more films such as a vertical seal portion overlap (hereinafter, a position where three or more films overlap) is overlapped and sealed. It is formed in a portion that seals the film overlapping portion).

  Thereby, it is a film superposition | polymerization part which is easy to generate | occur | produce especially an air leak, for example, in a good state by increasing the contact area of a sealing member and a heating surface in the film superposition part of a vertical seal part or an edge part (hem part). Since it becomes possible to seal, it becomes more reliable to ensure the airtightness in a bag.

  A heat sealing device according to a fourth aspect of the present invention is the heat sealing device according to any one of the first to third aspects of the present invention, and is disposed on at least one of the first seal member and the second seal member. The other 2nd seal member corresponding to a convex part and the recessed part arrange | positioned in the position in a 1st seal member are further provided.

  Here, when the convex portion is formed in the groove portion of the first seal member, the position of the groove portion of the second seal member that comes into contact when the convex portion formed in the groove portion of the first seal member presses the film. In addition, a recess is formed. Further, when the convex portion is formed in the groove portion of the second seal member, the concave portion is formed in the groove portion of the first seal member that comes into contact when the convex portion formed in the groove portion of the second seal member presses the film. Is formed.

  Thereby, when the film is pressed, the first sealing member and the second sealing member form a concave and convex engaging portion, so that by sandwiching the film between the concave and convex engaging portions, the heating surface of the sealing member It is possible to further reliably increase the contact area.

  A heat sealing device according to a fifth invention is the heat sealing device according to any one of the first to fourth inventions, and is provided on at least one of the first seal member or the second seal member. And a perforation forming part for forming perforations on the film.

  Here, at least one of the first seal member or the second seal member includes, for example, a perforation forming cutter capable of forming a perforation on the film.

  Here, in the heat sealing device of the perforation continuous bag specification, after the horizontal sealing in the width direction of the film, the perforation is formed with a cutter for forming the perforation so that the upper and lower products can be easily separated. ing. However, when a thin film is used for the packaging material, it is necessary to use a fusing knife that cuts (cuts) the upper and lower products while welding the film in order to ensure airtightness inside the bag. For this reason, when a thin film was used for the package, it was impossible to produce a perforated continuous bag product in which the upper and lower products were connected to each other.

  However, in the heat sealing device of the present invention, it is possible to perform a horizontal seal that ensures airtightness without taking measures to ensure airtightness with a fusing knife. Thereby, even if it is a case where it uses as packaging with a thin film, it is possible to produce the product of a perforation continuous bag. That is, when producing a perforated continuous bag product, it is very effective to apply the heat sealing device of the present invention.

  A packaging device according to a sixth aspect of the invention includes the heat sealing device according to any one of the first to fifth aspects of the invention.

  Here, for example, a bag making and packaging machine, which is one of the packaging devices, includes the heat sealing device as described above. Thereby, it becomes possible to produce a product that ensures a good sealing state for ensuring airtightness in the bag regardless of the characteristics of the package.

  According to the heat sealing device and the packaging device including the same according to the present invention, it is possible to form a good sealed state for ensuring airtightness in the bag regardless of the characteristics of the package.

  A bag making and packaging machine (packaging apparatus) including a lateral sealing mechanism (heat sealing apparatus) according to an embodiment of the present invention will be described below with reference to FIGS.

[Overall configuration of bag making and packaging machine 1]
A bag making and packaging machine 1 according to an embodiment of the present invention is a machine for bagging an article C to be packaged such as potato chips. As shown in FIG. 1 and FIG. The bag making and packaging unit 5 which is a main body portion for performing the above and a film supply unit 6 for supplying the bag making and packaging unit 5 with a film serving as a bag. Further, operation switches 7 are arranged on the front surface of the bag making and packaging unit 5, and a liquid crystal display 8 showing an operation state is arranged at a position where an operator who operates the operation switches 7 can visually recognize.

  The film supply unit 6 is a unit that supplies a sheet-like film F to the forming mechanism 13 of the bag making and packaging unit 5 described later, and is provided adjacent to the bag making and packaging unit 5 here. A roll around which the film F is wound is set in the film supply unit 6, and the film F is fed out from the roll.

  As shown in FIGS. 1 to 3, the bag making and packaging unit 5 includes a forming mechanism 13 for forming a film F sent in a sheet shape into a cylindrical shape, and a cylindrical film F (hereinafter referred to as a cylindrical film). F)), a vertical seal mechanism 15 that vertically seals (heat-seals) the overlapped portion of the tubular film F, and seals the tubular film F horizontally (heat-sealed). And a support frame 12 that supports each of these mechanisms. A casing 9 is attached around the support frame 12.

[Detailed configuration of bag making and packaging unit 5]
As shown in FIGS. 2 and 3, the forming mechanism 13 includes a tube 31 and a former 32.

  The tube 31 is a cylindrical member, and the upper and lower ends are open. The tube 31 is planarly disposed at the central opening of the top plate 29 and is integrated with the former 32 via a bracket (not shown). An article C to be packaged that is weighed from the computer scale 2 is put into the opening at the upper end of the tube 31.

  The former 32 is disposed so as to surround the tube 31. The shape of the former 32 is such that the sheet-like film F sent from the film supply unit 6 is formed into a cylindrical shape when passing between the former 32 and the tube 31. The former 32 is also fixed to the support frame 12 via a support member (not shown).

  The pull-down belt mechanism 14 and the vertical seal mechanism 15 are supported by rails 40 suspended from the top plate 29, and are arranged so as to sandwich the tube 31 from both sides. These mechanisms 14 and 15 are moved and aligned along the rail 40 when the tube 31 is attached.

  The pull-down belt mechanism 14 is a mechanism that sucks the cylindrical film F wound around the tube 31 and conveys it downward. The pull-down belt mechanism 14 is mainly composed of a driving roller 41 and a driven roller 42 and a belt 43 having a sucking function. . Here, illustration of a drive motor for rotating the drive roller 41 and the like is omitted.

  The vertical sealing mechanism 15 is a mechanism that heats and vertically seals the overlapping portion of the cylindrical film F wound around the tube 31 against the tube 31 with a constant applied pressure. The vertical sealing mechanism 15 includes a heater, a heater belt that is heated by the heater and contacts an overlapping portion of the tubular film F, and the like. Further, although not shown, the vertical seal mechanism 15 also includes a vertical seal drive unit for moving the heater belt closer to or away from the tube 31.

  As shown in FIG. 3, the lateral seal mechanism 16 includes a pair of seal jaws (a front seal jaw (first seal member) 51A, a rear seal jaw (second seal member) 51B), and a rear A perforation cutter (perforation forming portion) 53 incorporated in the side seal jaw 51B and a lateral seal drive portion for moving the pair of seal jaws 51A and 51B closer to or away from the tubular film F, not shown. It is configured to include. The horizontal sealing mechanism 16 moves from the upper side to the lower side with respect to the conveyance direction of the tubular film F. Further, the horizontal seal mechanism 16 moves in the direction in which it is pressed against the film F at the same time. A lateral seal is applied to the pressed portion of the film F by the pressure and heat of the pair of sealing jaws 51A and 51B applied to the film F at the time of the pressing. The pair of sealing jaws 51 </ b> A and 51 </ b> B moves downward at substantially the same speed as the film F without being further approached to the tubular film F after being pressed against the film F. The pair of sealing jaws 51A and 51B move downward by a predetermined distance, and then move upward while being separated from each other. (So-called D motion movement). Thereby, heat transfer can be performed while continuously feeding without stopping the transfer of the film F at every horizontal sealing. The lateral seal mechanism 16 will be described in detail later.

(Details of horizontal seal mechanism 16)
As shown in FIG. 3, the pair of sealing jaws 51A and 51B is formed of a metal material having a high thermal conductivity extending in the left-right direction, and as shown in FIG. It is inserted sideways. A seal surface heated by a built-in heater 54 is formed on the opposing surfaces of the seal jaws 51A and 51B. The tubular film F is heat-sealed by being sandwiched between the front seal jaw 51A and the rear seal jaw 51B.
In addition, a large number of tooth grooves (grooves) 60A and 60B are provided on the opposing surfaces of the sealing jaws 51A and 51B so as to engage with each other, and a sealing surface that heats the tubular film F by pressing is formed. is doing. Then, the tooth groove 60A provided in the front seal jaw 51A and the tooth groove 60B provided in the rear seal jaw 51B are engaged with each other with the tubular film F interposed therebetween to perform heat sealing.

  The pair of seal jaws 51A and 51B are respectively provided with slits 52 along the left and right direction, and in the left and right direction (film width direction) of the tubular film F in the slit 52 of the rear seal jaw 51B. A perforation cutter 53 that forms a perforation is stored. When the perforation cutter 53 is moved by an air cylinder (not shown) or the like, the perforation cutter 53 protrudes from the slit 52 of the rear seal jaw 51B toward the front seal jaw 51A and is pressed by the front seal jaw 51A and the rear seal jaw 51B. A perforation is formed on the cylindrical film F.

  Next, the convex part 61 arrange | positioned at the groove surface which forms the tooth groove 60B is demonstrated using FIG. 5, FIG.

  On the groove surface forming the tooth groove 60B provided in the rear seal jaw 51B, the convex portions 61 are arranged along the left and right sides of the rear seal jaw 51B. And the convex part 61 protrudes in the direction substantially orthogonal to the groove surface which forms the tooth groove 60B, as shown in FIG. Moreover, the convex part 61 protrudes in the substantially parallel direction to the conveyance direction of the surface facing the cylindrical film F, ie, the cylindrical film F, as shown in FIG. For this reason, the tooth groove 60B of the surface (FIG. 6: A part) which opposes the cylindrical film F in the position in which the convex part 61 was provided becomes a shape which has a surface substantially parallel to the conveyance direction of the cylindrical film F. ing. On the other hand, the shape of the tooth groove 60B on the surface facing the tubular film F at the position where the convex portion 61 is not disposed is a square shape.

  As described above, when the tubular film F is pressed by the tooth groove 60B in which the convex portions 61 are arranged along the left and right side directions, the width direction of the tubular film F is used when the film F having a thin sealant layer is used. A portion cut along (the left-right direction) and a portion not cut are formed. This is because the portion in contact with the tooth groove 60 </ b> B at the position where the convex portion 61 is not disposed is acute, and the film F is cut by applying a strong pressure to the tubular film F. Moreover, the cut | disconnected part can improve the airtightness of a seal part by the fusing effect by welding of a cut surface.

  Further, when using a general film that is not a thin sealant layer, that is, a film that is not cut by the pressure due to the engagement of the tooth gaps 60A and 60B (hereinafter referred to as a thick film F1), a convex portion By providing 61, the contact area in the film width direction between the film F1 and the heating surface of the rear seal jaw 51B can be increased, and the area of the seal portion can be increased. For this reason, a favorable sealing state can be formed, and it becomes possible to give a highly airtight seal.

  Note that the direction in which the convex portion 61 protrudes in a direction substantially perpendicular to the groove surface is not the direction in which the rear seal jaw 51B moves to press the tubular film F, but the direction orthogonal to that direction. That is, the direction is close to the conveyance direction of the tubular film F, and changes depending on the angle of the groove surface forming the tooth groove 60B.

  As shown in FIG. 7, the vicinity of the center of the pair of seal jaws 51 </ b> A and 51 </ b> B in the left-right direction is a portion where the pair of seal jaws 51 </ b> A and 51 </ b> B presses the vertical seal portion Sv of the tubular film F when heat-sealing. It corresponds to. That is, in the bag making and packaging machine 1 of the present embodiment, the vertical seal portion Sv of the tubular film F is conveyed near the center in the left and right direction of the seal jaws 51A and 51B. Thereby, generally, the convex portion 61 comes into contact with the horizontal seal portion Shv of the vertical seal portion Sv where a seal failure is likely to occur. For this reason, when using the thick film F1 in the bag making and packaging machine 1 of the present embodiment, the heating surface of the rear seal jaw 51B and the cylindrical shape at the horizontal seal portion Shv of the vertical seal portion Sv of the cylindrical film F. The contact area with the film F increases, and a highly airtight seal can be performed.

[Operation of bag making and packaging machine 1]
Next, a series of operations of the bag making and packaging machine 1 will be described with reference to FIGS.

  As shown in FIG. 3, the sheet-like film F sent from the film supply unit 6 to the forming mechanism 13 is wound around the tube 31 from the former 32 and formed into a cylindrical shape, and is conveyed downward by the pull-down belt mechanism 14 as it is. Is done. The film F is in a state where both ends are overlapped on the peripheral surface in the state of being wound around the tube 31, and the overlapped portion is vertically sealed by the vertical seal mechanism 15.

  The cylindrical film F that has been sealed vertically and has a cylindrical shape passes through the tube 31 and descends to the lateral sealing mechanism 16. At this time, simultaneously with the movement of the tubular film F, a lump of the article to be packaged C falls from the computer scale 2 through the tube 31.

  Next, in the horizontal sealing mechanism 16, as shown in FIG. 3, in the state where the article to be packaged C exists in the cylindrical film F, the upper end of the bag B and the upper part of the bag B where the article to be packaged C exist are present. The lower end portion of the bag B is press-contacted by a pair of seal jaws 51A and 51B and is laterally sealed. At this time, the tubular film F is pressed by a large number of tooth grooves 60A and 60B provided on the opposing surfaces of the seal jaws 51A and 51B.

  In this embodiment, as shown in FIGS. 5 and 6, the heating surface of the rear seal jaw 51 </ b> B is provided with a convex portion 61 that protrudes in a direction orthogonal to the direction in which the seal jaws 51 </ b> A and 51 </ b> B face each other. For this reason, when sealed by the sealing jaws 51A and 51B, as shown in FIG. 6, the tubular film F comes into contact with the A portion where the apex portion of the tooth groove 60B disappears. Further, the convex portion 61 in the width direction of the tubular film F is disposed at a position where the rear seal jaw 51B contacts the vertical seal portion Sv of the tubular film F. For this reason, the location where the three or more cylindrical films F overlap and the convex part 61 contact | abut.

  Then, the tubular film F which is press-contacted by the pair of seal jaws 51A and 51B and is laterally sealed has a substantially perforated cutter 53 housed in the slit 52 of the rear seal jaw 51B, and the substantially central portion of the lateral seal portion is left and right. Perforations are formed in the lateral direction. Thus, perforations are formed between adjacent bags B, and it becomes possible to produce a perforated continuous bag product in which a consumer can easily separate each of the bags B.

[Features of bag making and packaging machine 1]
(1)
The bag making and packaging machine 1 of the present embodiment projects on the heating surface of the rear seal jaw 51B not in the direction in which the seal jaws 51A and 51B face each other but in the direction intersecting the direction in which the seal jaws 51A and 51B face each other. A convex portion 61 is disposed. That is, as shown in FIG. 5, it protrudes in the up-down direction, which is the direction intersecting the front-rear direction. In other words, the convex part 61 which protrudes in a direction substantially parallel to the conveyance direction of the tubular film F is arranged.

  In the bag making and packaging machine 1 of the present embodiment, the tooth gap 60A is provided by providing the heating surface of the rear seal jaw 51B with a convex portion 61 protruding in a direction orthogonal to the direction in which the seal jaws 51A and 51B face each other. , 60B is provided to relieve the pressure caused by the engagement and to prevent the tubular film F from being cut.

  Thereby, when the thin film F is used for the bag making and packaging machine 1 of the present embodiment, the cylindrical film F is pressed by the tooth groove 60B in which the convex portions 61 are arranged along the left and right side directions. The part cut | disconnected along the width direction (left-right direction) of the film-like film F, and the location which is not cut | disconnected is formed. And the cut | disconnected part can improve the airtightness of a seal | sticker part by the fusing effect by welding of a cut surface.

  Further, when the thick film F1 is used in the bag making and packaging machine 1 of the present embodiment, the contact area between the thick film F1 and the heating surface of the rear seal jaw 51B is increased in the film F1 width direction by providing the convex portion 61. The area of the seal portion can be increased. For this reason, a favorable sealing state can be formed, and it becomes possible to give a highly airtight seal.

  As a result, it is possible to form a good sealing state for ensuring the airtightness in the bag, regardless of whether the film is a thin film F or a thick film F1.

(2)
In the bag making and packaging machine 1 of the present embodiment, tooth grooves 60A and 60B that are engaged with each other when the tubular film F is sandwiched are formed on the heating surfaces of the front seal jaw 51A and the rear seal jaw 51B. The convex part 61 is arrange | positioned at the groove surface which forms the tooth gap 60B.

  Thereby, it is possible to easily form the convex portion 61 protruding in the direction (vertical direction) intersecting the direction (front-rear direction) in which the front seal jaw 51A or the rear seal jaw 51B sandwiches the tubular film F (front-rear direction). Yes.

(3)
In the bag making and packaging machine 1 of the present embodiment, the vicinity of the approximate center of the rear seal jaw 51B in the left-right direction where the convex portion 61 is disposed is a pair of seal jaws when heat-sealing as shown in FIG. 51A and 51B correspond to the part which press-contacts the vertical seal | sticker part Sv of the cylindrical film F. FIG. That is, the convex part 61 is arrange | positioned in the position where three or more cylindrical films F overlapped.

  Thereby, the convex part 61 will contact with the horizontal seal | sticker location Shv of the vertical seal | sticker part Sv which a seal | sticker defect tends to generate | occur | produce generally. As a result, the contact area between the heating surface of the rear seal jaw 51B and the tubular film F increases, and a highly airtight seal can be performed.

(4)
In the bag making and packaging machine 1 of the present embodiment, the rear seal jaw 51B has a perforation cutter 53 that forms a perforation for making it easy to separate the upper and lower products from the tubular film F.

  In the bag making and packaging machine 1 of the present embodiment, it is possible to perform a lateral seal ensuring airtightness without taking measures to ensure airtightness with a fusing knife, so even if packaging with a thin film, A perforated cutter 53 is provided in place of the fusing knife, so that a perforated continuous bag product can be produced.

[Other Embodiments]
As mentioned above, although one Embodiment of this invention was described, this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the summary of invention.

(A)
In the bag making and packaging machine 1 of the above-described embodiment, an example in which the convex portion 61 is provided on the surface that forms the tooth groove 60B provided so as to engage with the opposing surfaces of the seal jaws 51A and 51B is given. Explained. Further, in the above embodiment, the groove surface forming the tooth groove 60B where the convex portion 61 is formed has a cross-sectional shape viewed from the left and right sides of the groove surface forming the tooth groove 60B of the rear seal jaw 51B. An example of a triangle or trapezoid having an angle as shown in FIG. However, the present invention is not limited to this.

  The presence or absence of the groove surface on which the convex portion is formed or the shape of the groove surface is not questioned. If convex portions that project in the direction intersecting with the direction in which the seal jaws face each other, that is, in the vertical direction are arranged, the same effect as the bag making and packaging machine 1 according to the above embodiment can be obtained. it can.

(B)
In the bag making and packaging machine 1 of the above embodiment, the convex portion 61 is disposed on the surface forming the tooth groove 60B of the rear seal jaw 51B, and when the seal jaws 51A and 51B sandwich the tubular film F with each other. The example in which the unevenness is not formed on the surface of the tooth groove 60A of the front seal jaw 51A corresponding to the protrusion 61 has been described. However, the present invention is not limited to this.

  For example, as shown in FIG. 8, the surface of the rear seal jaw (second seal member) 151B forming the tooth groove (groove portion) 160B and the tooth groove (groove portion) on the front seal jaw (first seal member) 151A side. The convex portions 161A and 161B may be arranged on both the surface forming 160A, or may be arranged only on the surface forming the tooth groove 160A of the front seal jaw 151A, although not shown.

  Further, for example, as shown in FIG. 8, when a pair of sealing jaws 151A and 151B constituting a lateral sealing mechanism (heat sealing device) 116 sandwich the tubular film F, a front side seal corresponding to the convex portion 161B. A recess 162A may be formed on the surface of the tooth groove 160A of the jaw 151A.

(C)
In the bag making and packaging machine 1 of the above-described embodiment, an example in which the cutter incorporated in the rear seal jaw 51B is the perforated cutter 53 has been described. However, the present invention is not limited to this.

  For example, not a perforation is formed on the tubular film F, but a general cutting cutter for cutting the tubular film F may be used.

(D)
In the bag making and packaging machine 1 of the above embodiment, the convex portion 61 is disposed in the vicinity of the approximate center of the rear seal jaw 51B in the left-right direction corresponding to the vertical seal portion Sv of the tubular film F, as shown in FIG. Explained with examples. However, the present invention is not limited to this.

  For example, when the part where the pair of sealing jaws press-contact the vertical seal part of the tubular film is on the right side of the center in the left-right direction when heat-sealing, arrange so that the convex part is arranged on that part May be. That is, a convex part should just be arrange | positioned in the part which a pair of sealing jaw press-contacts the vertical seal part of a cylindrical film when heat-sealing.

  Moreover, if said conditions are satisfy | filled, you may arrange | position a convex part uniformly, without limiting the position arrange | positioned along the longitudinal direction (left-right direction) of a sealing jaw, for example.

(E)
In the bag making and packaging machine 1 of the above-described embodiment, an example is described in which the convex portions 61 are arranged at portions where the pair of sealing jaws 51A and 51B press-contact the vertical sealing portion of the tubular film F when performing heat sealing. . However, the present invention is not limited to this.

  For example, when heat sealing, a pair of sealing jaws are placed on the hem part that is the end in the width direction of the tubular film. An effect similar to that of the bag making and packaging machine 1 according to the above-described embodiment can be obtained by arranging the convex portion at a portion where the portion where three or more tubular films overlap is pressed.

(F)
In the bag making and packaging machine 1 of the above embodiment, the convex portions 61 arranged on the groove surface forming the tooth groove 60B of the rear seal jaw 51B are in the seal width direction, that is, as shown in FIG. An example of being arranged at two locations along the line has been described. However, the present invention is not limited to this.

  For example, the number of convex portions arranged on the groove surface may be one or three or more.

(G)
In the bag making and packaging machine 1 of the above embodiment, after the pair of sealing jaws 51A and 51B are in pressure contact with the film F, they do not approach the tubular film F any more and move downward at substantially the same speed as the film F. An example of so-called D-motion movement has been described in which it moves, moves downward by a predetermined distance, and then moves upward while being separated from each other. However, the present invention is not limited to this.

  For example, it may be a bag making and packaging machine that is controlled so as to temporarily stop the conveyance of the film when the sealing jaw performs a lateral seal on the film.

  According to the present invention, it is possible to form a good sealing state for ensuring airtightness in the bag regardless of the characteristics of the package, so that not only the bag making and packaging machine but also the packaged item is sealed. The present invention can be widely applied to other packaging apparatuses such as stretch packaging machines.

The perspective view of the bag making packaging machine concerning one embodiment of the present invention. The side view of the bag making packaging machine which concerns on one Embodiment of this invention. The perspective view of the bag making packaging unit contained in FIG. FIG. 4 is a cross-sectional view of a horizontal seal mechanism included in FIG. 3. The perspective view which expanded the heating surface of the sealing jaw shown by FIG. Sectional drawing which expanded the tooth space of the sealing jaw shown by FIG. Explanatory drawing which showed the relative positional relationship of the sealing jaw shown in FIG. 4, and a cylindrical film. The side view which showed the state which the seal jaw contained in the bag making packaging machine which concerns on other embodiment of this invention engages mutually.

Explanation of symbols

1 Bag making and packaging machine (packaging equipment)
2 Computer scale 5 Bag making and packaging unit 6 Film supply unit 7 Operation switch 8 Liquid crystal display 9 Casing 12 Support frame 13 Forming mechanism 14 Pull-down belt mechanism 15 Vertical sealing mechanism 16 Horizontal sealing mechanism (heat sealing device)
29 top plate 31 tube 32 former 40 rail 41 drive roller 42 driven roller 43 belt 51A front side seal jaw (first seal member)
51B Rear seal jaw (second seal member)
52 slit 53 perforation cutter (perforation forming part)
54 Heater 60A, 60B Tooth groove (groove)
61 Convex 116 Horizontal sealing mechanism (heat sealing device)
151A Front seal jaw (first seal member)
151B Rear seal jaw (second seal member)
160A, 160B tooth gap (groove)
161 Convex part 162 Concave part F, F1 film, cylindrical film B Bag C Package

Claims (6)

A heat sealing device that seals a part of the film by sandwiching the film between a pair of sealing members that have heating surfaces facing each other, and is arranged so as to sandwich the conveyance path of the film that packages the product. Because
A first seal member having a groove formed in the heating surface;
A second seal member having a groove portion engaged with the groove portion on the first seal member side when sandwiching the film together with the first seal member;
A protrusion that is disposed on the heating surface of at least one of the first seal member or the second seal member and protrudes in a direction intersecting the direction in which the first seal member and the second seal member face each other. And
A heat sealing device comprising: The heating surfaces of the first seal member and the second seal member are formed with grooves that engage with each other when sandwiching the film,
The convex portion is disposed on a surface forming the groove portion.
The heat sealing apparatus according to claim 1. The convex portion is arranged at a position where three or more films overlap.
The heat sealing apparatus according to claim 1 or 2. A concave portion disposed at a position in the other second seal member and the first seal member corresponding to the convex portion disposed in at least one of the first seal member and the second seal member;
The heat sealing device according to any one of claims 1 to 3. Provided in at least one of the first seal member or the second seal member, and further comprising a perforation forming portion for forming a perforation with respect to the film;
The heat sealing apparatus according to any one of claims 1 to 4.   The packaging apparatus provided with the heat sealing apparatus of any one of Claim 1 to 5.

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