JP3189865U - Heavy packaging bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heavy packaging bag which is superior in independence to a single-layer structure heavy packaging bag when accommodating a filling material, can reduce a manufacturing cost as compared with a two-layer structure heavy packaging bag, and is small and easy to fold. .. SOLUTION: A heavy packaging bag 10 having a sealing portion on one end side and a filling port on the other end side does not overlap with the bonding portion inside a tube 13 in which a bonding portion 13g is arranged on the back surface 10R side. The sheet 15 arranged in is provided. [Selection diagram] FIG. 13

Description

  The present invention relates to a heavy wrapping bag for containing powder particles and the like.

  A paper packaging bag is made by overlapping and gluing both ends in the width direction of a long kraft paper, cutting the long tube formed at regular intervals, and sealing one of the cut ends. The other opening is used as the entrance / exit. In particular, heavy packaging bags containing grains of grains such as rice and wheat, such as several kilograms to 30 kilograms, and cement, as known in Patent Documents 1 to 3, etc. It is made of a laminated structure in which the above-described tubes using paper are stacked in two or three layers.

Japanese Utility Model Publication No. 7-9616 Japanese Utility Model Publication No.59-185538 JP 2010-215283 A

  The three-layer structure heavy packaging bag is naturally higher in strength and rigidity as a bag than the two-layer structure heavy packaging bag, and is excellent in self-supporting property when the filling is accommodated, but the manufacturing cost increases. It is more difficult to fold it down before use than a two-layer heavy packaging bag. In other words, a two-layer structure heavy packaging bag having a rigidity lower than that of a three-layer structure tends to be difficult to maintain the self-supporting property of the bag when a filling item is accommodated. For this reason, in Patent Documents 1 and 2, sealing paper or a reinforcing sheet is interposed between the inner tube and the outer tube.

  However, in Patent Document 1 in which sealing paper is bonded to the bonded portion and in Patent Document 2 that discloses pleated heavy packaging bags incorporating reinforcing sheets in the left and right fold portions, it is difficult to be folded small before use. There is a problem. In addition, there is a problem that the heavy packaging bag employing the configuration of Patent Document 1 cannot be manufactured essentially by the current heavy packaging bag manufacturing machine. That is, the method of manufacturing the packaging bag described in Patent Document 1 with the current machine is that the width of the base paper roll corresponding to the reinforcing paper in the middle of the figure is extremely narrow compared to the bag width, and the base paper roll is It is necessary to install a narrow roll at the end of the supporting cylinder. In this case, the width of the reinforcing paper roll is extremely narrow compared with the width of the base paper roll of the inner layer and the outer layer. In addition, a narrow roll must be disposed not at the center of the cylinder but at the end, which makes it difficult to control tension and prevent meandering. In addition, only the reinforcing paper is frequently cut while the three layers of paper are running, which causes a problem in productivity.

  The problem that exists when the above-described three-layer structure heavy packaging bag is compared with the two-layer structure heavy packaging bag is also the case where the two-layer structure heavy packaging bag is compared with the single-layer structure heavy packaging bag. The same applies.

[Purpose of the idea]
The purpose of the present invention is easy to manufacture, and is more self-supporting than a single-layer heavy packaging bag when filled, and can be manufactured at a lower cost than a two-layer heavy packaging bag. Another object is to provide a small and easy-to-fold heavy packaging bag. It is also included in the object of the present invention to provide a heavy packaging bag that is more self-supporting than a two-layer heavy packaging bag and can be manufactured at a lower cost than a three-layer heavy packaging bag.

  The heavy packaging bag according to the present invention is a heavy packaging bag having a sealing portion on one end side and a filling port on the other end side, inside the tube in which a bonding portion is arranged on the back side of the heavy packaging bag, It is characterized by comprising a sheet arranged so as not to overlap the bonded portion of this tube.

  In the heavy packaging bag according to the present invention, the tube is bonded to the back side of the heavy packaging bag so that it does not overlap with the inner tube where the bonding part is arranged on the back side of the heavy packaging bag. Part may be arranged between the inner tube and the outer tube so that the sheet does not overlap with the bonding part of the inner tube and the bonding part of the outer tube. .

  Further, the width of the sheet is preferably 50 to 180%, preferably 70 to 150%, more preferably 80 to 120% of the width of the heavy packaging bag, and extends beyond both side edges of the heavy packaging bag. It can be joined to the surface side of the heavy packaging bag along the filling port. Moreover, this heavy packaging bag may have a pleated single-bottom beam structure, and it is particularly effective to employ a boat-shaped bottom for the sealing part.

  In a general manufacturing method of a bag, three base paper rolls having the same width are installed in a cylinder making machine, and a tube is manufactured by the machine. The produced tube is sealed with a finishing machine, for example, with a sewing machine, and a bag is completed.

  A single-bottomed bag structure, a single-folded bag structure, a square-bottomed bag structure, and a single-doubled bag as illustrated in “Craft Paper Bag Bookmark” edited and published by the National Kraft Paper Bag Industry Association. Folded bag structure, single double folded bag structure with reinforced paper, foldless single stitched bag structure, pleated single stitched bag structure, pleated single double folded bag structure, folded single double folded bag with reinforced paper The present invention can be applied to a bag structure, a pleated double bottom bag structure, a fold double fold bag structure, a pleat L-type valve double fold bag structure, a pleat L-type valve double fold bag structure, and the like. In particular, a structure selected from a single folding bag structure, a square bottom bag structure, a single double folding bag structure, a single double folding bag structure with a reinforcing paper, a pleated single stitch bag structure, and a pleated single stitch bag structure. It is effective to use a heavy packaging bag.

Moreover, in this invention, the mouth strap extended beyond the both-sides edge of a heavy packaging bag can be joined to the surface side of a heavy packaging bag. For example, the present invention can be particularly preferably used for a single-bottom flash bag with a paper string used as a rice wheat bag. A typical rice wheat bag is composed of a three-layer bag of kraft paper or a base paper called crupack paper, which is craft paper with a slight forging, and the bottom is sealed with glue and the mouth is sealed with a mouth strap. It is a structure, and the mouth sealing after filling with rice is performed with a mouth strap bonded to the bag. Also in the present invention, kraft paper and kulpack paper are preferably used, and particularly kulpack paper is preferably used. In this case, the basis weight of the kraft paper and Kurupakku paper, preferably ^{50~120g / m 2, 70~90g / m} 2 is particularly preferred.

  In the case of a three-layer rice wheat bag, the base paper at the bottom of the inner layer, intermediate layer, and outer layer constituting the three layers is step-cut and folded, and the inner layer, intermediate layers, outer layers, inner layer, intermediate layer, and outer layer are glued together. It is bonded and sealed, and the mouth strap is bonded to the upper part of the back side portion to which the body portion of the three-layer bag is bonded. In order to increase the adhesive strength of the mouth strap, a part of the upper part of the outer layer base paper is folded and glued by being overlapped on the mouth strap, and the upper part of the back side where the mouth strap is installed can have a two-layer structure of the base paper. In the case of a two-layer bag, although the manufacturing cost can be saved, there is a problem that the upper portion of the bag on which the mouth strap is installed has a single-layer base paper structure, and if the portion is held after rice filling, the strength is weak. In the present invention, a packaging bag with a mouth strap in which a mouth strap is attached to the front side of a bag into which a reinforcing sheet is inserted can also have a two-layer structure at the top of the bag to which the mouth strap is attached, which is a particularly preferable aspect.

  According to the heavy packaging bag of the present invention, when the filling material is accommodated, the self-supporting property is superior to that of the single-layer heavy packaging bag, and the manufacturing cost can be reduced as compared with the two-layer heavy packaging bag.

  When the strap that extends beyond both sides of the heavy packaging bag is joined to the front side of the heavy packaging bag along the filling port, the filling is done without reducing the strength of the filling port on the back side of the heavy packaging bag. It is possible to provide a heavy packaging bag having a mouth string at the mouth.

  When the heavy packaging bag has a pleated single-bottom beam structure, the heavy packaging bag can be folded without being bulky.

  When the sealing part has a boat-shaped bottom, the self-supporting property of the heavy packaging bag when the filling is accommodated can be further improved.

  In the heavy packaging bag according to the present invention, the reinforcing sheet is installed in the center of the width of the base paper of the cylinder supporting the base paper roll, and is 25 to 90% of the width of the base paper roll of the outer layer and the innermost layer. Low and excellent in productivity without problems such as meandering.

It is a three-dimensional projection figure showing the external appearance in the use condition of one Embodiment which applied the heavy packaging bag by this invention to the rice bag. It is the three-dimensional projection figure which looked at the external appearance of the rice bag shown in FIG. 1 from the filling mouth side. It is the three-dimensional projection figure which looked at the external appearance of the rice bag shown in FIG. 1 from the sealing part side. It is sectional drawing along the IV-IV arrow in FIG. It is sectional drawing along the VV arrow in FIG. It is an expanded view of the rice bag shown in FIG. FIG. 3 is a three-dimensional projection view showing the appearance of perforations and slits formed in the first and second kraft paper continuum and the sheet continuum in the rice bag shown in FIG. 1. In the rice bag shown in FIG. 1, it is a top view showing the external appearance of the back surface side before forming a sealing part. It is a top view showing the manufacturing procedure of a sealing part with FIG. 10 and FIG. 11, and represents the state which opened the bottom part. It is a top view showing the manufacturing procedure of a sealing part with FIG. 9 and FIG. 11, and represents the state which turned the back surface side. It is a top view showing the manufacturing procedure of a sealing part with FIG. 9 and FIG. 10, and represents the state which turned up the surface side and finished forming the boat-shaped bottom. FIG. 6 is a cross-sectional view corresponding to FIG. 5 in another embodiment when the width dimension of the sheet is set to 180% of the width dimension of the heavy packaging bag in the present invention. FIG. 6 is a sectional view corresponding to FIG. 5 in yet another embodiment of the present invention.

  An embodiment in which a heavy packaging bag according to the present invention is applied to a 30 kilogram rice bag will be described in detail with reference to FIGS. However, the present invention is not limited to such an embodiment, and the filling port, the sealing port, and the like can be arbitrarily changed to a conventionally known configuration in accordance with the type of filling material and the usage pattern thereof.

  As schematically shown in FIG. 1 showing the use state of the rice bag according to the present embodiment and FIGS. 2 and 3 respectively showing the appearance of the rice bag, the rice bag 10 in the present embodiment has a sealing portion 11 on one end side and the other end. A pleated single-bottom beam structure having a side filling port 12 is employed. By adopting such a single-bottom beam structure, even when a large amount of rice is filled in the rice bag 10, its stable independence can be ensured. Further, it is possible to further reduce the bulk when folded (see the two-dot chain line in FIG. 3) by the configuration without pleats.

  FIG. 4 shows a cross-sectional shape taken along arrows IV-IV in FIG. 2, FIG. 5 shows a cross-sectional shape taken along arrows V-V in FIG. 3, and the appearance of the state in which the rice bag 10 of the present embodiment is unfolded and separated. Is shown in FIG. The rice bag 10 includes an inner tube 14, an outer tube 13, and a sheet 15 disposed between the inner tube 14 and the outer tube 13 on the surface 10 </ b> F side of the rice bag 10. Although the bonding part 13g of the outer tube 13 and the bonding part 14g of the inner tube 14 are arranged on the back surface 10R side of the rice bag 10, these two bonding parts 13g and 14g do not overlap each other. And shifted along the width direction of the rice bag 10. The width dimension of the sheet 15 in this embodiment is set to be approximately equal to the width dimension of the rice bag 10, and the rice bag 10 has a triple structure on the front surface 10F side and a double structure on the back surface 10R side. Thereby, rigidity can be improved and the independence can be improved rather than the conventional mere double structure heavy packaging bag. Further, it is possible to reduce the bulk when folded compared to the conventional mere triple-structure heavy packaging bag and to reduce the manufacturing cost. And since the sheet | seat 15 is distribute | arranged to the surface 10F side without the bonding parts 13g and 14g, the smoothness by the surface 10F side of the rice bag 10 is improved, and after manufacturing a bag, image or Even when printing characters or the like, the print quality can be kept good.

  On the surface 10F side of the filling port 12 of the rice bag 10, a mouth string 16 extending beyond both side edges of the rice bag 10 is joined. In the present embodiment, a pair of slits 17S is formed from the filling port 12 toward the sealing portion 11 side at both ends in the width direction of the outer tube 13 on the surface 10F side of the rice bag 10 and is formed between the pair of slits 17S. The folded portion 17 is folded back to the sealing portion 11 side. Since the length of the slit 17S is set to be larger than the width dimension of the mouth strap 16, the mouth strap 16 is covered with the folded portion 17, and the overlapping portions are glued to each other. The bonding strength between the outer tube 16 and the outer tube 13 is increased. Moreover, as shown in FIG. 4, since the part by the side of the filling port 12 including the attachment part of the mouth strap 16 can be made into a double structure, the rice bag which was hard to tear and was excellent in filling workability | operativity can be obtained.

  The sealing part 11 of the rice bag 10 in this embodiment has a known boat-shaped bottom. In the boat-shaped bottom of the present embodiment, no decorative paper is required, so that the material cost can be reduced and the thickness of the sealing portion 11 can be minimized.

  Except for the folded portion 17 of the outer tube 13, longitudinal ends of the outer tube 13, the inner tube 14, and the sheet 15 overlap each other to define the filling port 12. In contrast, the other longitudinal ends of the outer tube 13, the inner tube 14, and the sheet 15 are defined by the following perforations having a specific contour for forming a boat-shaped bottom.

In other words, the other longitudinal end of the outer tube 13, a first perforation 13P _F as a surface 10F side, a second perforation 13P _S of straddling pair on the surface 10F side and the rear surface 10R side and the rear surface 10R side defined by the third perforation 13P _R. Distance from the filling port 12 to the second perforation 13P _S is the distance from the filling port 12 to the first perforation 13P _F, is set in the middle of the distance from the filling port 12 to the third perforation 13P _R. If the maximum length of the outer tube 13 is the distance from the filling port 12 to the first perforation 13P _F, contour shape of the first to third perforation _13P F _{~13P R} becomes convex as shown in FIG. However, if the maximum length of the outer tube 13 is the distance from the filling port 12 to the third perforation 13P _R, contour shape of the first to third perforation _13P F _{~13P R} has a complementary concave and this (See FIG. 7). Further, the both widthwise end portions of the first perforation 13P _F of the outer tube 13, a pair of slits 13S to facilitate formation of the boat bottom are engraved toward the fill port 12 side.

  The other end in the longitudinal direction of the sheet 15 is defined by a straight perforation 15P. The distance from the filling port 12 to the perforation 15P is set to the same length as the maximum length of the outer tube 13 and the inner tube 14 along the longitudinal direction of the rice bag 10. In the present embodiment, a pair of slits 15S having the same function as the slit 13S of the outer tube 13 is formed from the perforation 15P toward the filling port 12 side.

The other longitudinal end of the inner tube 14, a first perforation 14P _F as a surface 10F side, a second perforation 14P _S of straddling pair on the surface 10F side and the rear surface 10R side, and the third as a rear surface 10R side It is defined by the perforations 14P _R. Distance from the filling port 12 to the second perforation 14P _S is the distance from the filling port 12 to the first perforation 14P _F, is set in the middle of the distance from the filling port 12 to the third perforation 14P _R. In the present embodiment, the distance from the filling port 12 to the second perforation 14P _S set from the filling opening 12 of the outer tube the same as the distance to the second perforation 13P _S. If the maximum length of the inner tube 14 is the distance from the filling port 12 to the third perforation 14P _R, contour shape of the first to third perforation _14P F _{~14P R} becomes concave as shown in FIG. However, if the maximum length of the inner tube 14 is the distance from the filling port 12 to the first perforation 13P _F, contour shape of the first to third perforation _14P F _{~14P R} has a complementary convex therewith (See FIG. 7). However, combined as the contour shape of the first to third perforation _14P F _{~14P R} of the inner tube 14, and the contour shape of the first to third perforation _13P F _{~13P R} of the outer tube 13 are opposite Please note that.

The first perforations 13P _F and 14P _F, the second perforations 13P _S and 14P _S, and the slits 13S to 15S and 17S described above are formed symmetrically with the center in the width direction of the rice bag 10 as the axis of symmetry.

FIG. 7 schematically shows the state of conveyance of the first and second kraft paper continuums 13W and 14W to be the outer tube 13 and the inner tube 14 and the sheet continuum 15W. When manufacturing the rice bag 10 by this embodiment, the continuous body 13W of the 1st kraft paper used as the outer side tube 13 is supplied toward a tuber. Prior to it, up to every two times the length of the rice bag 10 is engraved first to third perforation _13P F _{~13P R} which is a portion of the boat bottom. The maximum length of the outer tube 13 each engraved with a pair of slits 13S at the boundary between the first perforation 13P _F and the second perforation 13P _S which is a distance from the filling port 12 to the first perforation 13P _F. Furthermore, a pair of slits 17S is formed in the portion that becomes the filling port 12 of the first craft paper continuous body 13W in order to form a folded portion 17 for fixing the paper string.

Next, the sheet continuum 15W is supplied to the tube so as to overlap the first kraft paper continuum 13W. Prior to that, the boat-shaped bottom 15W is fed every twice the maximum length of the rice bag 10. A perforation 15P and a pair of slits 15S are formed. The overlapping portions of the sheet continuous body 15W and the first kraft paper continuous body 13W are glued together. In this case, as the perforations 15P that are engraved on the second perforation 13P _S and the sheet continuum 15W which is engraved on the first kraft paper continuum 13W are aligned in the transport direction, these longitudinal Align relative positions along the direction. The widths of the slits 13S engraved in the first kraft paper continuum 13W and the widths of the slits 15S engraved in the continuum 15W of the sheet coincide with each other. Align relative positions along the direction.

Further, the second craft paper continuum 14 </ b> W serving as the inner tube 14 is supplied toward the tube so as to overlap the continuum 15 </ b> W of the sheet and the continuum 13 </ b> W of the first kraft paper. Prior to this, the engraved first to third perforation _14P F _{~14P R} having the maximum length twice every boat bottom portion of the rice bag 10. The maximum length of the inner tube 14 is respectively engraved a pair of slits 14S at the boundary between the first perforation 14P _F and the second perforation 14P _S which is a distance from the filling port 12 to the first perforation 14P _F. And the part which becomes the front side of this continuous body 14W of this 2nd kraft paper, and the overlapping part of the continuous body 15W of a sheet | seat are glued together. In this case, as the perforations 15P that are engraved on the second perforation 14P _S and the sheet continuum 15W which is engraved on a second kraft paper continuum 14W are aligned in the transport direction, these longitudinal Align relative positions along the direction. The widths of the slits 14S engraved in the second kraft paper continuum 14W and the widths of the slits 15S engraved in the continuum 15W of the sheet coincide with each other. Align relative positions along the direction.

  Thereafter, the second kraft paper continuum 14W is folded inward in the width direction at both side edges of the sheet continuum 15W, and both side edges of the second kraft paper continuum 14W overlapping each other are glued. To form a bonding portion 14g. Next, the first kraft paper continuum 13W is folded inward in the width direction at both lateral edges of the sheet 15, and the first kraft paper continuum 13W and the second kraft paper continuum 14W overlap each other. Glue each other. At the same time, the side edges of the first kraft paper continuum 13W that overlap each other are glued together to form a bonding portion 13g.

Thus, by cutting the part which becomes the filling port 12 with respect to the continuous tube body formed with the tuber, the filling port 12 is formed in both ends, respectively, and two bags before forming a boat-shaped bottom A continuous body of rice bags 10 is obtained. Subsequently, tension is given to the continuous body of the rice bags 10 for two bags along the conveying direction, and the continuous body is divided into two at the perforations 13P _{F to} 15P. The appearance of the bottom 10R side of the bottom of the rice bag 10 obtained in this way is shown in FIG. While the mouth strap 16 is attached to the filling port 12 of the rice bag 10 individually separated in this way, a boat-shaped bottom sealing portion 11 is formed on the bottom of the rice bag 10 using a bottomer according to the procedure of FIGS. To do. Finally, as shown by a two-dot chain line in FIG. 3, the rice bag 10 is folded back from the central portion in the longitudinal direction so that the back surface 10 </ b> R side is inside, and the filling port 12 of the rice bag 10 is stacked so as to overlap the sealing portion 11.

In the embodiment described above, the boat-shaped bottom is formed so that the front surface 10F side is higher than the back surface 10R side, but it is also possible to form the boat-shaped bottom so that the back surface 10R side is higher than the front surface 10F side. . In this case, an inner tube 14 which is engraved the slits 14S (see FIG. 7), may be used and an outer tube 13 which is engraved with perforations _13P F _{~13P R} having a concave contour corresponding thereto. In addition, regarding the formation method of a boat-shaped bottom, it is possible to employ | adopt suitably the arbitrary methods conventionally known.

  In this embodiment, the width dimension of the sheet 15 is set to be approximately equal to the width dimension of the rice bag 10, but the width dimension of the sheet 15 can be set to 50 to 180% of the width dimension of the rice bag 10 as necessary. It is. When the width dimension of the sheet 15 is made smaller than the width dimension of the rice bag 10, it is generally preferable to arrange the sheet 15 at the center in the width direction of the rice bag 10, but if necessary, it is moved to one end in the width direction. It is also possible to arrange them. An example in which the width dimension of the sheet 15 is set to approximately 180% of the width dimension of the rice bag 10 is shown in FIG.

  Furthermore, one or more tubes can be further laminated on at least one of the inner side of the inner tube 14 and the outer side of the outer tube 13 as necessary. Alternatively, it is possible to apply the present invention to a heavy packaging bag having a single-layer structure, and FIG. 13 shows a cross-sectional structure of another embodiment of such a heavy packaging bag according to the present invention. Elements having the same functions as those of the embodiment are given the same reference numerals.

  As described above, the present invention should be construed only from the matters described in the claims of the utility model registration, and in the above-described embodiment, any changes and modifications included in the concept of the present invention are described. It is possible in addition to the matters described That is, all the matters in the above-described embodiments are not intended to limit the present invention, and can be arbitrarily changed according to its use and purpose, including any configuration not directly related to the present invention. To get.

10 rice bag 10F bonding unit of the bonding unit 13P _F ~13P _R perforations 14 inner tube 14g inner tube of the rear surface 11 sealing portion 12 fill port 13 outer tube 13g outer tube surface 10R rice bag of rice bag 14P _F ~14P _R perforation 14S slit 15 Sheet 15P Perforation 15S Slit 16 Mouth string 17S Slit 17 Folding part

Claims (6)

A heavy packaging bag having a sealing part on one end side and a filling port on the other end side,
A heavy packaging bag comprising a sheet disposed so as not to overlap a bonding portion of the tube inside a tube having a bonding portion disposed on the back side of the heavy packaging bag.   The tube includes an inner tube in which a bonding portion is disposed on the back side of the heavy packaging bag, and an outer tube in which a bonding portion is disposed on the back surface side of the heavy packaging bag so as not to overlap with the bonding portion of the inner tube. The said sheet | seat is distribute | arranged between the said inner tube and the said outer tube so that it may not overlap with the bonding part of an inner tube, and the bonding part of an outer tube. Heavy packaging bags.   The heavy packaging bag according to claim 1, wherein the width dimension of the sheet is 50 to 180% of the width dimension of the heavy packaging bag.   The weight according to claim 1 or 2, further comprising a mouth strap that is joined to the surface side of the heavy packaging bag along the filling port and extends beyond both side edges of the heavy packaging bag. Packaging bag.   The heavy packaging bag according to any one of claims 1 to 3, which has a pleated single-bottom beam structure.   The heavy packaging bag according to any one of claims 1 to 4, wherein the sealing portion has a boat-shaped bottom.

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