JP2004331136A - Gusset packaging machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gusset packaging machine for making gussets from sideward on a packaging material when sealing ends, which can fold proper gussets with a simple structure and can stabilize the finish of a bag package. <P>SOLUTION: A tubular packaging material Ft is swollen from the inside by a gas 31 fed by an air feed means 30 to shape the swollen shape of the material Ft by a shaping member 32. Gusset claws 41 and 42 make gusset folds from sideward on the tubular packaging material Ft synchronously with the operation of an end sealer 8 for applying an end seal on the packaging material Ft surrounding a product A. The gusset folds are formed on the sufficiently swollen tubular packaging material by a simple structure, so that the folds are properly formed and a bag package P having stably finished gussets and a good appearance can be obtained. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a gusset wrapping machine that inserts a gusset into a wrapping material from the side when wrapping a packaging material in a tubular shape with an end seal applied to the bag.
[0002]
[Prior art]
Conventionally, for packaging machines that package bulk products such as Japanese confectionery, bread and rice with packaging materials such as packaging films, web-type packaging materials in which products supplied in the horizontal direction are fed in the same horizontal direction. Encloses in a cylindrical shape, heat seals the joined edges of the cylindrical packaging material to give a center seal, and further seals the packaging material before and after the product in the feed direction of the packaging material, thereby obtaining a product. Are packaged with a so-called three-side seal. For a lump-shaped product, the horizontal packaging machine can supply the product easily into the cylindrical packaging material without damaging the product, as compared with the vertical packaging machine.
[0003]
In a horizontal pillow or reverse pillow packaging machine, if the product is a rice ball or a rectangular bulk food, the product shall be placed in a stable position with its widest surface at the bottom and without a risk of collapse. Supplied inside. On the other hand, at retail stores, the package is placed in a standing position with one of the flat but narrow peripheral surfaces as the bottom surface in consideration of the appearance, appeal, and orderly and efficient display of the product. Often displayed side by side. In this case, the surface without the seal opposite to the side on which the center seal is applied is the front surface, and usually, the front surface is printed with the product. In such a standing position, both ends of the end seal portion are spread horizontally in a normal three-way seal, so that there are problems such as being bulky and interference with an adjacent package at the time of display, and it is difficult to display space-saving and orderly. It is. Therefore, by performing end sealing with the gusset folded from the side of the bag, the bag is formed into a compact shape conforming to the shape of the product. Even if the product is a loose product, in order to be able to be displayed in an upright posture, in the case of a bag package manufactured by a vertical bag making and filling machine, a cylindrical package is placed especially at a position close to the bottom end seal portion. The gusset is inserted from the side of the material.
[0004]
As a method for packaging confectionery, a continuous packaging method using a three-sided pillow packaging machine has been proposed (see Patent Document 1). In this packaging method, each packaging body is separated by taking a long length between adjacent end seals of the packaging bodies adjacent in the feeding direction of the packaging paper, and cutting the packaging paper with a cutter at a position between the end seals. You. The end of the wrapping paper extending outside the end seal is located at a position downstream of the end of the end seal by several wraps, that is, at a position that does not interfere with the operation of the end seal, and It is lifted and folded back by a pusher or guide that operates in synchronization with transport. Further, by pressing the folded end portion of the wrapping paper toward the wrapping body with a pressing tool, a Japanese-style wrapping feeling similar to a wrapping paper wrap is created. The wrapping paper is creased at the time of paper feeding, and the gusset is folded into the wrapping paper by applying a folding plate along the fold.
[0005]
However, when such a gusset is folded, if the tubular packaging material is not in a sufficiently expanded state, when the gusset claws are pressed and folded, the wrapping may be insufficient or incomplete, and the package may be defective. May be. In addition, by merely feeding gas into the inside of the tubular packaging material, the center sealing portion of the tubular packaging material cannot normally occupy the center directly and bulge symmetrically up, down, left and right, and the onion is also asymmetrical in the left and right sides. It usually swells in shape. In such a case, even if the gusset claw folds the tubular packaging material, a stable and good-looking gusset cannot be formed.
[0006]
[Patent Document 1]
JP-A-61-11311 (lower column of page 2, FIGS. 3 to 5, FIGS. 9 to 10)
[0007]
[Problems to be solved by the invention]
Therefore, when applying the end seal to the packaging material that wraps the product in a cylindrical shape and packaging it in a bag, the gusset packaging machine that inserts the gusset from the side of the packaging material, by appropriately inflating the cylindrical packaging material There is a problem to be solved in that it enables proper folding with gusset claws.
[0008]
SUMMARY OF THE INVENTION An object of the present invention is to provide a gusset wrapping machine that inserts a gusset from the side of a wrapping material from the side when wrapping a product in an end seal on a wrapping material that wraps the product in a cylindrical shape and wraps the bag. An object of the present invention is to provide a gusset wrapping machine which can be folded and has a stable finish and good appearance in any bag package.
[0009]
[Means for Solving the Problems]
In order to solve the above problems, a gusset wrapping machine according to the present invention is provided with an end sealer for applying an end seal to a cylindrical packaging material surrounding a product, and the end sealer being operated in synchronization with the operation of the end sealer. Gusset claw that inserts a gusset fold from the side to the tubular packaging material, air supply means that sends gas for inflating the tubular packaging material from the inside, and a shaping member that shapes the bulging shape of the tubular packaging material Made up of
[0010]
According to this gusset packaging machine, the tubular packaging material that wraps the product is inflated from the inside by the gas sent from the air supply means. When the tubular packaging material swells, the bulging shape is shaped by the shaping member, so that the bulging shape can be prevented from being distorted, for example, left-right asymmetric. Since the gusset claw inserts the gusset claw from the side into the cylindrical packaging material in which such bulge is appropriately shaped, a stable gusset fold shape can be obtained. Furthermore, since the end sealing is applied to the cylindrical packaging material into which the appropriate gusset has been folded, the gusset package having a stable shape can be obtained.
[0011]
The gusset packaging machine includes a supply conveyor for supplying the product in a lateral direction, a former for forming a web-like packaging material into the tubular packaging material with both side edges thereof facing upward, and a product for forming the tubular packaging material into the product. Paper feeding means for feeding in the same horizontal direction as the supply direction of the sheet, a center sealer for sealing the both side edges of the tubular packaging material, and a transport conveyor for transporting the tubular packaging material wrapping the product in a mounted state. Wherein the end sealer is disposed downstream of the center sealer and has upper and lower end sealers that sandwich the packaging material therebetween, and the air supply means is an air supply pipe that opens to an inlet of the cylindrical packaging material. Wherein the shaping member is a tunnel-shaped shaping plate disposed on the transport conveyor, and may be an inverted pillow packaging machine capable of continuous packaging of the product. In the case where the product is an individual lump article, when the product is supplied to the packaging machine, it is better to feed the product laterally by a conveyor than to throw it in by gravity, thereby avoiding collapse and damage of the product. According to a gusset packaging machine configured as an inverted pillow packaging machine, the product is supplied by a supply conveyor, the web-shaped packaging material is formed into a cylindrical packaging material by a former, and the cylindrical packaging material is supplied by paper feeding means. The paper is fed in the same direction as the direction, the both side edges of the web-shaped packaging material are sealed by a center sealer, the tubular packaging material wrapping the product is transported in a mounted state by a transport conveyor, and the tubular packaging material is end-mounted. A series of operations in which an end seal is performed while being sandwiched between upper and lower end sealers constituting the sealer are continuously repeated.
[0012]
In a gusset wrapping machine configured as an inverted pillow wrapping machine, the center sealer forms a center seal portion by sealing the both side edges of the web-shaped wrapping material in a palm shape, and the shaping member includes the end. Prior to the end seal by the sealer, a guide slit for lowering the center seal portion toward the cylindrical packaging material can be formed. In many cases, the web-like packaging material is formed into a cylindrical packaging material by connecting both side edges thereof with a center seal portion which is sealed in a palm shape. In order to apply a reliable and good-looking end seal to the cylindrical packaging material having the center seal portion, it is preferable to previously tilt the center seal portion to the side. Since the shaping member is provided in such a manner as to surround the cylindrical packaging material and regulate the way in which it expands, a corresponding portion where the center seal portion moves with the feeding of the cylindrical packaging material to the shaping member that performs the shaping function. In the formation of the seal, by forming a guide slit that tilts the upright palm-shaped center seal portion sideways as it approaches the end sealer, the shaping member can also serve as the side tilting action of the center seal portion, This can contribute to a reduction in points.
[0013]
In a gusset packaging machine configured as a reverse pillow packaging machine, the gusset claw is a first gusset claw that inserts a gusset fold into the cylindrical packaging material on the upstream side of the end sealer, and on a downstream side of the end sealer. A second gusset claw that is positioned and gusset-folded from the side with respect to the tubular packaging material formed in the bag. The first gusset claw and the second gusset claw may have the same shape and structure, but the first gusset claw has a wedge shape suitable for forming a bag bottom, and the second gusset claw has a flat plate shape suitable for forming a bag mouth. It can also be configured.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of a gusset packaging machine according to the present invention will be described with reference to the accompanying drawings. FIG. 1 is a side view showing one embodiment of an inverted pillow packaging machine to which a gusset packaging machine according to the present invention is applied, and FIG. 2 is a perspective view showing a main part including a shaping means of the inverted pillow packaging machine shown in FIG. .
[0015]
The gusset packaging machine according to the present invention is generally configured as an inverted pillow packaging machine shown in FIG. As shown in FIG. 1, the reverse pillow packaging machine 1 is basically fed from a carry-in conveyor 2 that supplies the product A in a lateral direction and a roll R disposed below the carry path on the downstream side of the carry-in conveyor 2. 3 for forming the web-like packaging material Fw to be formed into a tubular shape, and the tubular packaging material Ft with both side edges Fa, Fa fitted in a palm shape above the tubular packaging material Ft formed by the former 3. Paper feed means 4 comprising a pair of paper feed rollers 5 and 5 for feeding the paper A in the same horizontal direction as the supply direction of the product A, and both side edges Fa and Fa of the tubular packaging material Ft arranged downstream of the paper feed means 4. A center sealer 6 composed of a pair of heat seal rollers 7, 7 for heat-sealing, and an end sealer 8 disposed downstream of the center sealer 6 to apply an end seal to the packaging material F between adjacent products A, A. It has. In the reverse pillow packaging machine 1, since the product A is supplied in the horizontal direction, when the product A is an individual lump article, it is better to feed the product A in the horizontal direction by the carry-in conveyor 2 than to input the product by gravity. The product A can be continuously packed in the tubular packaging material Ft by a series of operations of the above components without being deformed or damaged when the product A is sent to the packaging machine.
[0016]
In FIG. 1, a tubular packaging material Ft and a product A placed at regular intervals inside the tubular packaging material Ft are placed and transported on a belt conveyor 10 as a transport conveyor, The seal position is fed by the end sealer 8. The paper feeding means 4 for feeding the cylindrical packaging material Ft is rotated in synchronization with the belt conveyor 10. The end sealer 8 disposed downstream of the center sealer 6 includes an upper end sealer portion 14 and a lower end sealer portion 15 that sandwich the tubular packaging material Ft from above and below at positions between adjacent products A. The trajectory is driven by a driving unit (not shown) so that the trajectory performs a box motion indicated by an imaginary line, for example. The end sealer 8 can incorporate a cutter 9 for cutting the cylindrical packaging material Ft. On the downstream side of the end sealer 8, a belt conveyor 12 for carrying out, which is adjusted to the same height as the belt conveyor 10, is disposed. The bag package P with the end seal is transferred to the belt conveyor 12. It is carried out. In accordance with the box motion of the end sealer 8, the belt conveyors 10 and 12 move the ends 11, 13 of both conveyors back and forth to transfer the cylindrical packaging material Ft in which the product A is wrapped. A so-called shuttle conveyor which can be opened and closed in accordance with the sealing operation period can be constituted.
[0017]
In the reverse pillow packaging machine 1, in order to stably form the gusset, an air feeding means 30 for sending a gas for inflating the tubular packaging material Ft from the inside is disposed near the former 3, preferably obliquely forward on the upstream side thereof. Have been. The air supply means 30 may be, for example, an air supply pipe opening at the entrance of the cylindrical packaging material Ft as shown in the figure, but is not limited thereto, and may be a blower or a nozzle inserted inside the cylindrical packaging material Ft. May be. From the air supply means 30, a gas 31 such as clean air from an air supply source (not shown) is blown into the cylindrical packaging material Ft as shown by an arrow. Since the downstream front end of the tubular packaging material Ft is closed by being end-sealed by the end sealer 8, the blown gas 31 inflates the tubular packaging material Ft wrapping the product A from the inside.
[0018]
On the upstream side of the end sealer 8 and around the cylindrical packaging material Ft transferred on the belt conveyor 10, a shaping member 32 for shaping the expanded shape of the cylindrical packaging material Ft when it is expanded by the gas 31 is provided. ing. The shaping member 32 is arranged at a position close to a region where a gusset claw 40 to be described later is subjected to gusset folding. As shown in FIG. 2, the shaping member 32 has a tunnel-like structure having a gate-shaped cross section that surrounds the cylindrical packaging material Ft in cooperation with the belt conveyor 10. The shaping member 32 is formed on the belt conveyor 10 in a plate structure including a top plate portion 33 and a pair of side plate portions 34 arranged on both sides of the top plate portion 33. The top plate portion 33 and the side plate portions 34, 34 may be integrally formed or may be formed separately, and are attached to an appropriate support portion. The integrally formed shaping member is easy to handle, but is a shaping member dedicated to the tubular packaging material Ft. The shaping members formed separately need to be adjusted in position with each other, but can exert a shaping action according to the size of the tubular packaging material Ft. When the tubular wrapping material Ft is inflated by the gas 31, the shaping member 32 regulates the free swelling of the tubular wrapping material Ft so that the tubular wrapping material Ft follows the inside shape of the rectangular shape of the cross-section of the shaping member 32. Therefore, for example, it is possible to prevent bulging into a distorted shape such as left-right asymmetry such as a cross-sectional shape of onion, and to exert a shaping effect even on a portion where the gusset is to be folded.
[0019]
In connection with the end sealer 8, a gusset claw 40 for inserting a gusset fold from the side with respect to the cylindrical packaging material Ft to which the end seal is applied is provided. The gusset claw 40 includes a first gusset claw 41 for inserting a gusset fold into the tubular packaging material Ft on the upstream side of the end sealer 8, and a tubular packaging material located on the downstream side of the end sealer 8 and formed in a bag. A second gusset claw 42 into which the gusset is folded from the side with respect to Ft. The first gusset claw 41 and the second gusset claw 42 may have the same shape and structure, but as shown in FIG. 2, the first gusset claw 41 is formed into a wedge shape suitable for forming a bag bottom, and the second gusset claw 42 is It may be configured in a flat plate shape suitable for forming a bag mouth.
[0020]
The gusset claw 40 is operated in synchronization with the operation of the end sealer 8 as in the conventional gusset folding. That is, the gusset claw 40 advances into the cylindrical packaging material Ft and inserts the gusset before the end sealer 8 performs the sealing operation, and at an appropriate time immediately before or after the end sealer 8 performs the sealing operation. It operates at the timing of retreating from the cylindrical packaging material Ft. Since the gusset claw 40 inserts the gusset fold from the side into the cylindrical packaging material Ft whose bulge is appropriately shaped by the shaping member 32, a stable gusset fold shape is always obtained. Further, since the end sealer 8 applies the end seal to the cylindrical packaging material Ft into which the appropriate gusset is folded, the gusset package P having a stable shape and good appearance can be obtained.
[0021]
In many cases, the web-like packaging material Fw is formed into a tubular packaging material Ft by connecting both side edges Fa, Fa with a center seal portion Fc which is sealed in a palm shape. In the reverse pillow packaging machine 1, the center sealer 6 forms the center seal portion Fc. In order to apply a reliable and good-looking end seal to the cylindrical packaging material Ft having the center seal portion Fc, it is preferable to previously tilt the center seal portion Fc to the side. Prior to the end seal by the end sealer 8, the shaping member 32 is formed with a guide slit 35 for turning the center seal portion Fc toward the cylindrical packaging material Ft. Since the shaping member 32 is provided in such a manner as to abut on the cylindrical packaging material Ft to regulate the swelling, the shaping member 32 has a guide slit 35 through which the center seal portion Fc runs as the cylindrical packaging material Ft is fed. Can be formed. On the upstream side, the center seal portion Fc receives the center-sealed center seal portion Fc, which is in an upright state at the time of forming the seal, and is inclined toward the end sealer 8. When you pass by, you will fall to the side. The top plate portion 33 of the shaping member 32 can be inclined such that the height is gradually reduced in accordance with the cylindrical packaging material Ft whose diameter is reduced as the gusset folding proceeds. As described above, the shaping member 32 can be used for shaping the packaging material as well as for the center seal portion Fc to be laterally tilted, thereby contributing to a reduction in the number of components.
[0022]
In the above embodiment, the horizontal reverse pillow packaging machine 1 has been described as an example of the bag packaging machine. In the reverse pillow packaging machine 1, since both side edges Fa, Fa of the packaging material F are overlapped and heat-sealed at the cylindrical uppermost point, the center seal portion Fc is formed on the upper side. The margin portion Fb is bent toward the center seal portion Fc by the pressure when the air nozzle 21 attached to the lower end sealer portion 15 blows air supplied from the air supply source 22 through the flexible supply pipe 23, and is heat-sealed. In the bent state, the end seal portion having a high temperature due to the residual heat is cooled immediately by the cooling action of the blowing air, and the bending deformation is fixed. By the fixing of this deformation, the end seal portion is given a kink, and the work of attaching the label L supplied thereafter by the kink over the margin portion Fb and the bag body becomes easy. The label L can be bent and pasted by a label presser 24 such as a sponge roller, and the bag package P having a good finish and appearance can be obtained by setting the side of the bag package P without the seal portion to the front side. .
[0023]
The gusset packaging machine according to the present invention is applicable not only to the same horizontal pillow packaging machine but also to a vertical bag making and filling machine. As the product A, for example, when packaged in a bag package, such as a castella, a Japanese confectionery, and an onigiri, it is preferable that the product be able to stand upright and be displayed at a store, but it is obviously not limited to this. It is. Further, the heat seal on the bag mouth side is not necessarily required for the end seal on the bag mouth side when another closing means such as twisting or wire bundling is used instead of the heat seal. Further, in the reverse pillow packaging machine 1, the gas to be blown may be an inert gas such as aseptic air or nitrogen gas in the case of food, although it depends on the type of the product A, and the product A itself is already packaged. If so, clean air may be used.
[0024]
【The invention's effect】
A gusset packaging machine according to the present invention provides an end sealer for applying an end seal to a cylindrical packaging material surrounding a product, and a cylindrical packaging material that operates in synchronization with the operation of the end sealer and is provided with an end seal from a side. A gusset claw for inserting a gusset fold is provided. The gas supplied by the air supply means inflates the cylindrical packaging material from the inside, and the shaping member shapes the bulging shape of the cylindrical packaging material. Therefore, according to this gusset wrapping machine, when a tubular wrapping material for wrapping a product is end-sealed and bag-wrapped, the gusset is folded into the cylindrical wrapping material from the side with a simple structure and properly. It is possible to stabilize the finish of any bag package.
[Brief description of the drawings]
FIG. 1 is a side view showing one embodiment of an inverted pillow packaging machine to which a gusset packaging machine according to the present invention is applied.
FIG. 2 is a perspective view showing a main part including a shaping means of the gusset wrapping machine shown in FIG.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 reverse pillow wrapping machine 2 carry-in conveyor 3 former 4 paper feeding means 5 roller 6 center sealer 7 heat seal roller 8 cutter 10 belt conveyor 11 end part of belt conveyor 10 belt end 13 end of belt conveyor 12 upper side End sealer part 15 Lower end sealer part 21 Air nozzle 22 Air supply source 23 Flexible supply pipe 24 Pressing member 30 Air supply means 31 Gas 32 Shaping member 33 Top plate part 34 Side plate part 35 Guide slit 40 Gazette claw 41 First gusset Claw 42 Second gusset claw A Product Fw Web-like packaging material Ft Cylindrical packaging material Fa Both side edges of packaging material Fb Margin portion Fc Center seal portion L Label P Bag package

Claims (4)

An end sealer for applying an end seal to a cylindrical packaging material surrounding a product, a gusset claw that inserts a gusset fold from the side with respect to the cylindrical packaging material that operates in synchronization with the operation of the end sealer and is subjected to an end seal; A gusset wrapping machine comprising an air supply means for sending gas for inflating the cylindrical packaging material from the inside, and a shaping member for shaping the bulging shape of the cylindrical packaging material. The gusset packaging machine includes a supply conveyor for supplying the product in a horizontal direction, a former for forming a web-like packaging material into the tubular packaging material with both side edges thereof facing upward, and a product for forming the tubular packaging material into the product. Paper feeding means for feeding in the same horizontal direction as the supply direction of the sheet, a center sealer for sealing the both side edges of the tubular packaging material, and a transport conveyor for transporting the tubular packaging material wrapping the product in a mounted state. Wherein the end sealer is disposed downstream of the center sealer and has upper and lower end sealers that sandwich the packaging material therebetween, and the air supply means is an air supply pipe that opens to an inlet of the cylindrical packaging material. 2. The gusset wrapping machine according to claim 1, wherein the shaping member is a reverse pillow wrapping machine capable of continuous packaging of the product, wherein the shaping member is a tunnel-shaped shaping plate arranged on the transport conveyor. The center sealer forms a center seal portion by sealing the both side edges of the web-shaped packaging material in a palm shape, and the shaping member includes the center seal portion prior to the end seal by the end sealer. 3. The gusset packaging machine according to claim 2, wherein a guide slit for folding is formed on the cylindrical packaging material side. The gusset claw is a first gusset claw that inserts a gusset fold into the tubular packaging material on the upstream side of the end sealer, and the tubular packaging material located on the downstream side of the end sealer and formed in a bag The gusset packaging machine according to claim 2, comprising a second gusset claw for inserting a gusset fold from the side of the gusset.

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