JP6051024B2 - End seal device and package - Google Patents

Description

  The present invention relates to an end seal device and a package that seals a packaging film before and after the product after the packaging film is formed into a cylindrical shape, and the product is supplied into the cylindrically formed packaging film.

  There are various types of packages, and one of them is a pillow package. This pillow package is formed into a cylindrical shape by passing a band-shaped packaging film through a bag making machine, and seals (center-seal) both edges in the traveling direction of the packaging film to form a cylindrical film. It is manufactured by enclosing a packaged object in the tubular film and sealing (cutting) the end of the film part between the front and rear packaged objects in a direction orthogonal to the traveling direction of the tubular film.

  As shown in FIG. 1, the package 1 manufactured in this way encloses an article 2 to be packaged, and is sealed by a center seal portion and top seal portions 4 formed at both ends. Take the form.

  The end seal device that forms the top seal portion 4 of the pillow package includes a pair of upper and lower sealers, and a groove is formed in the center of the seal surface of the sealer. A cutter is disposed in the concave groove of the lower sealer. This cutter can move up and down relatively with respect to the sealer. Thereby, it can seal by pinching | interposing a cylindrical film with a pair of sealers, Furthermore, a cutter raises and the front-end | tip protrudes rather than a sealing surface, and cuts the sealing site | part of a cylindrical film. . This type of end seal device is disclosed in, for example, the conventional technique of Patent Document 1.

  In addition, the sealing surface is formed with a sealing pattern made of irregularities of a predetermined pattern. In this seal, the top and bottom are staggered, the convex part of the seal surface of the upper sealer is concave on the seal surface of the lower sealer, the film part is firmly sandwiched by the top and bottom unevenness, and the film is pressed while heating, and the film The sealant surface formed on one side is melted, closely and integrally sealed.

JP 2008-239165 A

  In the conventional package, the top seal portion 4 may wave in the width direction, and the appearance is poor. This phenomenon is considered to be one of the causes, for example, that the thickness of the film is not uniform in the width direction but is uneven, and stress is applied without the applied pressure being uniformly applied in the width direction. In addition, a heater is disposed inside the sealer in the width direction of the seal portion, heat generated from the heater is diffused and transmitted to the seal surface, and the film portion is heated by the heat of the seal surface. Therefore, the heat generated from the heater is partially uneven in the first place, or even if the heat generated from the heater is uniform as a whole, the distance from the heater to the seal surface is not constant, or the heat conductivity of the heater The temperature distribution over the entire sealing surface in contact with the film may not be constant due to variations in the film, and the fact that the entire film is not heated uniformly is also considered to be a cause of film slamming.

  Although such a phenomenon has existed for a long time, the top seal part has a small specific gravity of the bad appearance in the whole package, and the fact is that it has not been noticed. That is, for example, the front surface of the package may have been given the product name of the packaged items and various advertisements / designs, and it is not preferable that the wrinkles or undulate, In the first place, it was an end part of the package, its presence itself was not so conspicuous, and since the above-mentioned product name and various advertisements were not made, it was treated as a non-defective product even if it was slightly wavy.

  On the other hand, for example, there are various types of collective package bodies in which a plurality of individually packaged packages are prepared and the plurality of packages are packaged. In recent years, the number of packages to be packaged in a collective package is small, and the entire package of the collective package is transparent, and the state of the package stored inside can be seen from the outside. In this case, the individual package itself is one of the advertising effects, and the appearance of the individual package is also an important factor. Then, the corrugated form of the top seal portion is unsatisfactory and undesirably provided, and includes an end seal device that forms a top seal portion that is not wavy or less conspicuous and less noticeable, and the top seal portion. The problem of wanting a new package arises.

In order to solve the above-described problems, the end seal device of the present invention includes (1) a pair of sealers arranged with a packaging film interposed therebetween, and the sealing film is moved to heat the packaging film between the sealing surfaces at the ends. And an end seal device that pressurizes and heat-seals, wherein the seal surface of one of the pair of sealers is provided with a ridge extending in the width direction of the packaging film, and the pair of other sealers In the seal surface, a groove is provided at a position facing the ridge, and when the packaging film is heated and pressurized with the sealer, a gap is secured between the ridge and the groove, film portion of the packaging film which is located is configured to be molded along said ridge, said sealing surface seals th is formed, the height of the ridges, the seal th It was set to be higher than of.

  If it does in this way, the film part located in the clearance gap between a protruding item | line and a ditch | groove will wrap along the surface of a protruding item | line on the top seal part formed by pressurizing and heating with a pair of sealers (seal surface). It is molded so as to extend in the width direction of the film. Therefore, the film is stiffened by the molding site formed in the top seal portion, the waviness in the width direction is suppressed at the top seal portion, and the finished product is improved.

  (2) It is good to provide the drive mechanism which moves the sealer by the predetermined locus, maintaining the state where the seal surfaces of the pair of sealers were made to oppose. In this way, since almost the entire seal surface is in contact with the film at the same time, the film portion is formed by the gap between the ridge and the groove while performing heat and pressure treatment with the seal surface on the entire top seal portion. I can do it.

In the present invention, before Symbol the sealing face seal eyes are formed, the height of the ridges, because of the higher than the height of the seal eye, increasing the convex condition than the height of the sealing th film It can be firmly molded to give it a firmness.

(3) The sealing surface may be an inclined surface that is inclined forward and rearward from a central position in the traveling direction of the packaging film.

(4) The said protruding item | line is good to each provide in the front end side and back end side of the advancing direction of the said packaging film. If it does in this way, the shaping | molding site | part (corresponding to the curved part 41b of embodiment) along a protruding item | line will be formed in the base part (main body vicinity side) of a top seal part, and firmness will be strong, and generation | occurrence | production of a wave will be suppressed more.

(5) The package according to the present invention is a top seal in which both side edges of a packaging film formed into a cylindrical shape are bonded to form a center seal portion, and both the center seal portion and the opening at both ends in the crossing direction are heat sealed. In the package formed by forming the portion, the top seal portion is premised on having a stiffness applying portion extending in the intersecting direction. The stiffening portion corresponds to the bending portion 41b of the embodiment. By having a stiffening portion, the top seal portion is stiff and the waviness in the width direction is suppressed, and the finished product is improved.

In the premise described above, the crimping portion is formed in the vicinity of the root of the top seal portion, and the curved portion that is heated and protrudes to the front side or the back side of the top seal portion is straight in the intersecting direction. The height of the curved portion is higher than the height of the sealing seam formed in the top seal portion and extending in the intersecting direction . The surface of the top seal portion is a surface located on the upper side when the package is placed, and the back surface of the top seal portion is a surface located on the lower side when the package is placed. In the embodiment, the stiffness applying portion is configured by a curved portion that protrudes to the surface side, but it may be configured to protrude downward on the contrary.

  According to the present invention, it is possible to form a top seal portion that is not wavy or less noticeable and less noticeable, and the product value of the package is increased.

It is a perspective view which shows the package manufactured using the conventional apparatus. It is a front view which shows an example of the pillow packaging machine in which the end seal device concerning the present invention was incorporated. It is an enlarged view which shows the principal part (a pair of sealer) of an end seal apparatus. (A) is a figure which expands and shows the seal surface in a sealing state, (b) is a figure which shows the sealing surface in a state where a pair of sealers separated. It is a perspective view which shows the package body manufactured using this embodiment. (A) is a top view which shows the package manufactured using this embodiment, (b) is a partial front view which shows the top seal part periphery of the package, (c) is FIG.6 (b). ) Is a diagram showing a state in which the top seal portion 41 is viewed from the arrow A.

  2 to 4 show a preferred embodiment of the present invention. As shown in FIG. 2, the pillow packaging machine 10 in which the end seal device of this embodiment is incorporated includes a packaging machine main body 11 and a film supply that continuously supplies a strip-shaped packaging film to the packaging machine main body 11. An apparatus 12 and a packaged article transport and supply device 14 that is arranged on the upstream side of the packaging machine main body 11 and supplies the packaged article 13 to the packaging machine main body 11 at predetermined intervals.

  The film supply device 12 links the output of a drive motor (not shown) (speed-controllable motor such as a servo motor) to the original roll 16 obtained by winding the belt-like film 15 into a roll. Supplying to the packaging machine body 11 at a constant speed while appropriately controlling the rotation speed. Further, various rollers 17 (only one is representatively shown in the figure) are arranged at predetermined positions from the original fabric roll 16 to the packaging machine body 11, and the belt-like film 15 fed out from the original fabric roll 16. Is guided to the packaging machine main body 11 through a predetermined path by being passed over the roller 17. Of course, in the present invention, it is not always necessary to link the drive motor to the raw roll 16, and a feed roller may be provided on the transport path of the packaging film and pulled out.

  The package transport and supply device 14 includes a sprocket 19 disposed at the front and rear, an endless chain 20 spanned over the plurality of sprockets 19, and a plurality of push fingers 21 attached to the endless chain 20 at a predetermined pitch. It consists of. As a result, when the push finger 21 hits the rear surface of the article 13 to be packaged, the article 13 also moves forward on the transport path 17 as the push finger 21 moves.

  The packaging machine main body 11 is arranged on the downstream side of the bag making device 25 that sets the supplied belt-like film 15 into the cylindrical film 24, and the film polymerization end of the tubular film 24 is in the traveling direction. A center seal device 27 that heat-seals along the belt, a belt conveyor 26 that is disposed on the downstream side of the center seal device 27 and that transports the cylindrical film 24 containing the article 13 to be packaged, and a downstream side of the belt conveyor 26. An end seal device 30 disposed and a carry-out conveyor 28 disposed on the downstream side of the end seal device 30 are provided.

  Here, the end seal device 30 is of a so-called box motion type, and a pair of upper and lower sealers 31 and 32 move along a predetermined locus while maintaining a state in which the seal surfaces 31a and 32a face each other. A drive mechanism is provided. The sealers 31 and 32 operated by this drive mechanism move closer to each other from a reference position separated by a predetermined distance and sandwich the tubular film 24 from above and below, so that the film portion in contact with the seal surfaces 31a and 32a is predetermined. And pressurizing at a pressure of Both the sealers 31 and 32 move forward along the moving direction of the tubular film 24 while maintaining the state in which the tubular films 24 are sandwiched by approaching each other as described above. The moving speed at this time is equal to the moving speed of the tubular film 24. Both sealers 31 and 32 move away from each other when moved by a predetermined distance, and move in the direction opposite to the moving direction of the tubular film 24 to reach the reference position.

  As shown in an enlarged view in FIG. 3, concave grooves 31b and 32b are provided at the center of the seal surfaces 31a and 32a of the upper and lower sealers 31 and 32, respectively, and a heater is provided in the vicinity of the seal surfaces 31a and 32a. 31c and 32c are incorporated. And the cutter blade 34 is arrange | positioned in the recessed groove 31b provided in the upper sealer 31 so that an up-down movement is possible. The cutter blade 34 is positioned in the concave groove 31b in a normal state, and the cutter blade 34 moves up and down relatively with respect to the sealer 31 according to a cylinder or other drive source. When the cutter blade 34 comes to the lowermost position, the blade portion at the tip projects downward from the seal surface 31a.

  The concave groove 32b provided in the lower sealer 32 is provided at a position facing the concave groove 31b of the upper sealer 31, and the lower end portion of the cutter blade 34 protruding downward from the seal surface 31a of the sealer 31 can be inserted. It becomes. The widths of both the concave grooves 31b and 32b are made equal to each other and increased by one with respect to the thickness of the cutter blade 34 to prevent the cutter blade 34 from contacting the concave grooves 31b and 32b when the cutter blade 34 is moved up and down. Yes.

  Furthermore, in this embodiment, the seal surfaces 31a and 32a of the sealers 31 and 32 are inclined surfaces having an upward inclination that gradually increases from the concave grooves 31b and 32b toward the outside. In addition, horizontal seals were formed on the seal surfaces 31a and 32a. A horizontal line is a seal line parallel to the longitudinal direction of the seal. In other words, since the seal stitches are parallel along the longitudinal direction of the sealers 31, 32, as shown in an enlarged view in FIG. 3, there are peaks in the short direction of the sealers 31, 32 (seal surfaces 31a, 32a). The portions (convex portions) 31a ′ and 32a ′ and the trough portions (concave portions) 31a ″ and 32a ″ are alternately positioned. Further, each of the peak portions 31a ′ and 32a ′ and the valley portions 31a ″ and 32a ″ becomes a ridge and a groove extending in parallel with the longitudinal direction of the sealer. The crest 31a 'formed on the sealer 31 (sealing surface 31a) and the trough 32a "formed on the sealer 32 (sealing surface 32a) face each other, and the trough 31a" formed on the sealer 31 (sealing surface 31a). And the crest 32a 'formed on the sealer 32 (seal surface 32a) face each other, and the height of the crest 31a' (the difference in height between the deepest part of the trough 31a '' and the apex of the crest 31a '), The heights of the peaks 32a ′ (the difference in height between the deepest part of the valleys 32a ″ and the apex of the peaks 32a ′) are made equal, and the surface shapes of the peaks and valleys are substantially matched.

  Thus, when the cylindrical film 24 is sandwiched between the pair of upper and lower sealers 31, 32, the cylindrical film 24 is crushed and the sealant surfaces on the inner peripheral surface side are in contact with each other, and the pair of sealers 31, 32 Are engaged with each other, the film part located between the sealers of the tubular film 24 is pressed and heated between the crests 31a 'and the troughs 32a "or between the crests 32a' and the troughs 32a" to form a film part. The applied sealant layer is melted and adhered to be heat sealed. Further, the cutter blade 34 is moved downward in accordance with the timing of sandwiching the tubular film 24 with the sealers 31 and 32 and heat-sealing to cut the tubular film 24 in the lateral direction.

  Thereby, the front end side of the cylindrical film 24 is isolate | separated, and the package 40 is manufactured. The package 40 is carried out by the carry-out conveyor 28 shown in FIG. Also, as shown in FIG. 5, the film portions sandwiched and sealed between the sealers 31 and 32 at both ends of the package 40 become the top sealer portion 41. In the present embodiment, since the seal surfaces 31a and 32a are inclined surfaces, the top seal portion 41 is also aligned in an obliquely downward posture. Further, the top seal portion 41 is formed with a seal line 41a extending in the width direction by the horizontal lines formed on the seal surfaces 31a and 32a.

  In the present embodiment, a film stiffening portion is provided in the vicinity of the outside of the seal surfaces 31a and 32a. This stiffness of the film gives the film of the top seal portion 41 strength in the width direction. The seal surface 32a of the lower sealer 32 is provided with a ridge 35, and the seal surface 31a of the upper sealer 31 is provided. A concave groove 36 is provided at a position facing the ridge 35. Both the ridge 35 and the groove 36 are formed in a straight line extending in the longitudinal direction of the seal surfaces 31a and 32a. The height h1 of the ridge 35 with the deepest part of the valley part 32a ″ as the reference level is higher (for example, 3 to 4 times) than the height h2 of the peak part 32a ′ constituting the seal. The depth d1 of the concave groove 36 with the top of the crest 31a ′ as a reference level is deeper (for example, 3 to 4 times) than the depth d2 of the trough 31a ″ constituting the seal (see FIG. 4). . Further, as shown in an enlarged view in FIG. 4 (a), even if the crest portions 31a 'and 32a' and the trough portions 32a "and 31a" that make up the seal eyes come into contact with each other when the sealers 31 and 32 approach, A predetermined gap S is set between the strip 35 and the groove 36.

  As a result, the seal surfaces 31a and 32a of the pair of sealers 31 and 32 come into contact with the tubular film 24 and are pressurized and heated at a predetermined pressure, and the sealant layer of the tubular film is melted and crushed and closely adhered. The film portion sandwiched between the ridge 35 and the groove 36 is heated to some extent while in contact with the surface, but the sealant layer of the tubular film is not crushed by the effect of the gap S, and the film The part is molded so as to be curved along the surface of the ridge 35. Since the ridges 35 and the groove 36 are formed near the outside of the seal surfaces 31 a and 32 a, the film portion sandwiched between the ridges 35 and the groove 36 is located on the base side of the top seal portion 41. As a result, as shown in FIG. 6B, a small curved portion 41 b is formed near the root of the top seal portion 41. As shown in FIG. 6A, the curved portion 41b is formed to extend in a straight line in the width direction of the top seal portion 41. The straight curved portion 41b gives a stiffness to the film portion. FIG. 6C shows a state in which the top seal portion 41 is viewed from the arrow A in FIG. As described above, the curved portion 41b makes the film stiff, and as shown in FIG. 6C, the top seal portion 41b is suppressed from wavy in the width direction. Therefore, the finished product is good and the product value is improved.

  In the embodiment described above, the sealing surfaces 31a and 32a are inclined surfaces. However, the present invention is not limited to this and may be a horizontal surface. In the above-described embodiment, the sealing eyes formed on the sealing surface are horizontal. However, various sealing eyes such as a vertical and a gouge may be used, and a type without a sealing eye may be used.

  In the embodiment described above, the pair of sealers 31 and 32 approach and separate from each other, and the box motion type end seal device 30 moves forward in synchronization with the movement of the tubular film in the approached state. However, the present invention is not limited to this, and for example, it may be a type that does not move forward and backward but only moves close to and away from it, or may be applied to a rotary end seal device.

DESCRIPTION OF SYMBOLS 10 Pillow packaging machine 11 Packaging machine main body 12 Film supply apparatus 13 Packaged article 14 Packaged article conveyance supply apparatus 24 Cylindrical film 27 Center seal apparatus 30 End seal apparatus 31, 32 Sealers 31a, 32a Seal surfaces 31a ', 32a' Mountain Portions 31a ", 32a" Valleys 31b, 32b Grooves 34 Cutter blades 35 Ribs 36 Grooves 40 Packaging 41 Top seal portion 41b Curved portion

Claims (5)

An end seal device comprising a pair of sealers arranged with a packaging film sandwiched between them, and moving the sealer to heat the packaging film between the sealing surfaces at the tips and pressurize and heat-seal,
On the sealing surface of one sealer of the pair of sealers, a ridge extending in the width direction of the packaging film is provided,
On the sealing surface of the other pair of sealers, a groove is provided at a position facing the ridge,
When heating and pressurizing the packaging film with the sealer, a gap is secured between the ridge and the groove, and the film portion of the wrapping film located in the gap is molded along the ridge. is configured so that,
Sealing eyes are formed on the sealing surface,
The end seal device is characterized in that the height of the ridges is higher than the height of the seal eyes.   The end seal device according to claim 1, further comprising a drive mechanism that moves the sealer along a predetermined locus while maintaining a state in which the seal surfaces of the pair of sealers are opposed to each other.   3. The end seal device according to claim 1, wherein the sealing surface is an inclined surface that is inclined forward and backward from a center position in a traveling direction of the packaging film. 4.   The end seal device according to any one of claims 1 to 3, wherein the protrusions are provided on a front end side and a rear end side in a traveling direction of the packaging film, respectively. In the package formed by sticking both side edges of the packaging film made into a cylindrical shape and forming a center seal portion, and heat sealing the opening at both ends in the cross direction with the center seal portion,
It said top seal portion have a stiffness enhancing portion extending in the intersecting direction,
The crimping portion is formed near the base of the top seal portion, and is arranged such that a curved portion that is heated and protrudes to the front side or the back side of the top seal portion extends in a straight line in the intersecting direction. It is,
The package according to claim 1, wherein the height of the curved portion is higher than the height of the sealing seam formed in the top seal portion and extending in the intersecting direction .

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