JP5155289B2 - Bulk bag - Google Patents

Description

  The present invention relates to a bulk bag, and more particularly, to a bulk bag made up of inner and outer double bags.

  Conventionally, what is called flexible intermediate bulk containers, FIBC (Flexible Intermediate Bulk Containers), or bulk bags have been used in order to efficiently transport bulk cargo or granular materials such as resin pellets, so-called bulk cargo. . (Hereafter referred to as bulk back)

  As shown in FIGS. 1 and 2, the conventional bulk bag 10 has a substantially rectangular parallelepiped shape as a whole for shipping, other transportation, or storage. The bulk bag 10 is affixed to an outer bag 11 that is installed outside and serves as an outer peripheral wall, an inner bag 12 that is installed in the outer bag 11 and serves as an inner peripheral wall, and corners inside the inner peripheral wall. It is comprised from the some shape holding means 13 supported so that it may not collapse by the dead weight of the bulk cargo (not shown) which is contained (refer patent document 1).

  In order to store bulk cargo (not shown) in good condition, the internal bag 12 in the conventional bulk bag 10 needs to have a function such as waterproofness or airtightness. However, since the material having such a function has low structural strength, it is covered and held by the external bag 11 having high strength.

  However, when such a conventional bulk bag 10 is filled with a bulk cargo and transported in a suspended state, the contained bulk cargo tends to sink downward due to its own weight. Therefore, as shown in the drawing, the upper edge of the inner bag 12 is not suspended along with the upper edge of the outer bag 11. For example, when the suspension means is attached only to the upper edge of the outer bag 11 and the inner bag is simply lifted so as to be housed in the inner bag, even if the shape retaining means 13 is provided at the corner inside the inner peripheral wall, The bag 12 is deformed downward. When the upper end edge of the inner bag 12 is suspended together with the upper end edge of the outer bag 11, the pressure due to the weight of the entire bulk cargo is applied unevenly to the body of the inner bag 12. Has the problem that it tends to burst at places where the pressure is relatively strong.

Taiwan Utility Model Registration No. M340256

  In view of the above problems, an object of the present invention is to provide a bulk bag including an internal bag having high structural strength.

  In order to achieve the above object, the present invention provides a bulk comprising: an external bag installed outside and serving as an outer peripheral wall; and an inner bag installed inside the outer bag and serving as an inner peripheral wall. Provided is a bulk bag characterized in that a plurality of pleats are formed on at least the outside of the inner peripheral wall and connected to the outer peripheral wall by the plurality of pleats. . In particular, a bulk bag that has an upper opening and can be suspended, and is an external bag that is installed outside and serves as an outer peripheral wall, and an interior that is installed in the outer bag and serves as an inner peripheral wall. In a bulk bag comprising a bag and a plurality of shape holding means attached to the inside of the inner peripheral wall, the inner peripheral wall has at least a plurality of pleats extending vertically on the inner peripheral wall. A bulk bag is provided which is formed and connected to the outer peripheral wall by the plurality of pleats.

  As an embodiment of the present invention, each of the plurality of pleats is a bent part extending outward from the wall surface of the inner peripheral wall, and bent in the opposite direction by bending from an end of the bent part. And a plurality of folds formed in a U-shape, and both the folds and the folds in each fold are fixed to the outer peripheral wall. It is done.

  In addition, a plurality of connection portions are formed on the outer peripheral wall so as to correspond to the plurality of pleat portions at least inside thereof, and the plurality of pleat portions are respectively fixed to the connection portions. There are also things.

  As an embodiment of the plurality of connecting portions in the outer peripheral wall, a bent portion that extends outwardly from the wall surface of the outer peripheral wall, and a folded portion that extends from the end portion of the bent portion and extends in the opposite direction, respectively. And U-shaped pleats, in which the pleat portions of the inner peripheral wall are respectively inserted into and fixed to the corresponding pleat portions of the outer peripheral wall.

  Fixation between the pleat portion in the inner peripheral wall itself or between the pleat portion and the outer peripheral wall may be achieved by any one of stitching, hot press adhesive, or adhesive adhesive. In the case of sewing, the mechanical strength is improved, and in the case of adhesion, leakage prevention or waterproofing is improved. Therefore, it is particularly preferable to use the adhesion method on the inner side and the sewing method on the outer side, respectively.

  When the bulk bag of the present invention having the above structure is suspended and transported, the inner bag is connected to the outer bag through a fold formed on the outer side thereof, so that it does not collapse downward. In addition, since it is reinforced by an external bag through the pleats, its tensile strength is high and it is difficult to burst due to its own weight.

It is a disassembled perspective view of the conventional bulk bag. It is a perspective view of the internal bag in the bulk bag of FIG. It is a perspective view of the bulk bag in Example 1 of the present invention. FIG. 4 is an exploded perspective view of the bulk bag of FIG. 3. It is a longitudinal cross-sectional view of the bulk bag of FIG. FIG. 4 is a cross-sectional view of the bulk bag of FIG. 3. It is the elements on larger scale which show the connection of the fold part of an internal peripheral wall and the U-shaped pleat part of an external peripheral wall in the bulk bag of FIG. It is the elements on larger scale which show the I part of FIG. It is a disassembled perspective view of the bulk bag in Example 2 of this invention. FIG. 10 is a partially enlarged view showing a connection between a fold portion of the inner peripheral wall and a U-shaped fold portion of the outer peripheral wall in the bulk bag of FIG. 9. It is the elements on larger scale which show the connection of the fold part of an internal peripheral wall and the U-shaped pleat part of an external peripheral wall in the bulk bag of Example 3 of this invention. It is the elements on larger scale which show the connection of the fold part of an internal peripheral wall and the U-shaped pleat part of an external peripheral wall in the bulk bag of Example 4 of this invention. It is the elements on larger scale which show the connection of the fold part of an internal peripheral wall and the U-shaped pleat part of an external peripheral wall in the bulk bag of Example 5 of this invention.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to FIGS. In the following description, components having substantially the same function and configuration are denoted by the same reference numerals, and redundant description will be given only when necessary.

  As shown in FIGS. 3, 4, and 5, the bulk bag of the first embodiment is a bulk bag having an upper opening 200 and a suspension ring 211 for suspending the entire bulk bag, An external bag 20 that is installed outside and is an external peripheral wall, an internal bag 30 that is installed in the external bag and is an internal peripheral wall, and four pieces that are attached to corners inside the internal bag 30 Shape holding means 40.

  The inner bag 30 is a bag made of a thin polyethylene (PE) material excellent in waterproofness and flexibility, and is formed in a substantially rectangular parallelepiped shape having side walls 31.

  As shown in FIG. 6, two pleats 313 are formed on each surface of the side wall 31 of the inner bag 30 so as to extend vertically.

  Further, as shown in FIGS. 6 and 7, each pleat portion 313 includes a bent portion 3130 that bends and extends outward from the side wall 31 of the inner bag 30, and an end portion 3131 of the bent portion 3130 that is bent in the opposite direction. And a folded portion 3132 that extends and is formed in a U-shape.

  The outer bag 20 is mainly composed of a polypropylene (PP) material having rigidity and toughness.

  As shown in FIG. 7, a plurality of connecting portions 212 are formed on the side wall 21 of the outer bag 20 so as to correspond to the plurality of pleat portions 313 on the side wall 31 of the inner bag 30.

  As shown in the drawing, each pleat portion 313 is fixed to a connecting portion 212 corresponding thereto.

  The connecting portion 212 may be formed inside the outer bag 20 or may be formed on the side wall 21 of the outer bag 20 itself. The first embodiment shows a form in which a connecting portion 212 is formed on the side wall 21 itself of the outer bag 20. That is, as shown in FIG. 7, the connecting portion 212 is bent from the side wall 21 itself of the outer bag 20 and extends to the outside, and the bent portion 2120 is bent from the end 2121 of the bent portion 2120 and extends in the opposite direction. It is a U-shaped fold part formed so that it may be provided with the folding | turning part 2122 to be.

  Further, as shown in FIG. 7, the plurality of pleat portions 313 in the inner bag 30 are respectively inserted and fixed in the grooves 2123 of the U-shaped pleat portion (that is, the connecting portion 212) of the outer bag 20.

  The fixing of the plurality of pleat portions 313 in the inner bag 30 of the bulk bag of the first embodiment and the U-shaped pleat portions as the plurality of connecting portions 212 in the outer bag 20 is performed by stitching.

  Furthermore, since there are four shape holding means 40 and they are respectively attached to the four corners 300 inside the inner bag 30, the shape of the inner bag 30 due to the weight of the bulk cargo (not shown) contained therein can be prevented. Can be prevented.

  Further, as shown in FIGS. 6 and 7, both end portions 42 of the shape holding means 40 located at each corner 300 are respectively inserted into U-shaped grooves 3133 of two pleat portions 313. Furthermore, it is inserted into the U-shaped groove 2123 corresponding to the pleat portion 313 together with the pleat portion 313.

  Furthermore, as shown in the drawing, the bent portion 3130 of each fold portion 313, one side 42 of the shape holding means 40 inserted in the U-shaped groove 3133 of the fold portion 313, and the folded portion 3132 are: The adhesive portions 314 are adhered to each other by hot pressing, and the adhesive portions 314 extend vertically along the corresponding pleat portions 313.

  As shown in FIG. 8, the adhesive portion 314 in each pleat portion 313 is formed on the inner side of the fixed portion by stitching together the plurality of pleat portions 313 in the inner bag 30 and the plurality of connecting portions 212 in the outer bag 20. Has been.

  With the above configuration, the bulk bag according to the first embodiment is configured such that the internal bag 30 is fixed to the external bag 20 via the plurality of pleat portions 313, so that the bulk cargo (see FIG. (Not shown) is dispersed from the inner bag 30 to the outer bag 20 via the plurality of pleats 313, whereby the pressure applied to the inner bag 30 is reduced and is not easily ruptured.

  Furthermore, since the adhesive part 314 is formed inside the seam 5 in the bulk bag of the first embodiment, the adhesive part 314 can maintain waterproofness even if the seam 5 is formed.

  As shown in FIGS. 9 and 10, the configuration of the bulk bag of the second embodiment is similar to the configuration of the bulk bag of the first embodiment, and therefore only the differences will be described below. The bulk bag of the second embodiment has two inner and outer folds in a region between each fold portion 313 of the inner bag 30 and the U-shaped fold portion as the connecting portion 212 of the outer bag 20 corresponding to the fold portion 313. Two reinforcing sheaths 32 are sandwiched.

  The inner and outer two reinforcing sheaths 32 are sewn and fixed together with the bent portions 3130 and the folded portions 3132 of the pleat portions 313 in the inner bag 30 to the U-shaped pleat portions as the connecting portions 212 in the outer bag 20.

  Further, of the two inner and outer reinforcing sheaths 32, the inner reinforcing sheath 32 is adhered to the inner bag together with the adhesive portion 314 by the hot press at the portion overlapping the adhesive portion 314.

  In the bulk bag according to the second embodiment, the strength of each pleat portion 313 in the inner peripheral wall 31 of the bulk bag is increased, and the fixing between the inner bag 30 and the outer bag 20 is further stabilized.

  Since the configuration of the bulk bag of the third embodiment is similar to the configuration of the bulk bag of the first embodiment, only the differences will be described below. As shown in FIG. 11, in the bulk bag of the third embodiment, the range of the adhesive portion 314 between the folded portion 3130 and the folded portion 3132 of each fold portion 313 in the inner bag 30 also includes the outside of the seam 5. Since the both end portions 42 of the shape holding means 40 are integrated by hot pressing with the inserted edges, the fixing property and the waterproof property are excellent.

  As shown in FIG. 12, the configuration of the bulk bag of the fourth embodiment is similar to the configuration of the bulk bag of the second embodiment, and therefore only the differences will be described below. In the bulk bag of the fourth embodiment, the range of the adhesive portion 314 includes the outside of the seam 5, and both end portions 42 of the shape holding means 40 are inserted into the U-shaped grooves 3133 of the fold portions 313, respectively. Instead, it is adhered and fixed directly to the inner wall surface of the inner bag 30 by hot pressing.

  As shown in FIG. 13, in the bulk bag of the fifth embodiment, each pleat portion 313 in the inner bag 30 is formed on a flexible sheet material 34 attached to the outer wall surface of the inner bag 30. .

  That is, each flexible sheet material 34 is formed so that the adhesive portions 314 are attached to the outer wall surface of the inner bag 30 by hot pressing on the left and right ends, respectively. Further, an intermediate portion of each flexible sheet material 34 protrudes into a U shape and is inserted and fixed in a groove 2123 of a U shape fold portion as a connecting portion 212 of the external bag 20.

  In the bulk bag of the fifth embodiment, since the inner bag 30 is sewn to the outer bag 20 via the flexible sheet material 34, the inner bag 30 itself has no seam and is particularly excellent in waterproofness.

  As described above, in the bulk bag of the present invention, since the inner bag is connected to the outer bag through a plurality of pleats, it is difficult to collapse downward during use, and the tensile strength is improved by this configuration. Therefore, it is difficult to burst due to its own weight.

  In the bulk bag of the present invention, the adhesive portion by hot pressing of each pleat portion in the inner bag is formed at least on the inner side from the seam formed by stitching the inner bag and the outer bag together. Even if formed, the adhesive portion can maintain waterproofness, and bulk cargo can be stored for a long time.

200 Upper Opening 20 External Bag 21 Side Wall of External Bag 211 Hanging Ring 212 Connecting Portion 2120, 3130 Bending Portion 2121, 3131 End Portion 2122, 3132 Folding Portion 2123, 3133 U-shaped Groove 30 Internal Bag 300 Corner Portion 31 Internal Bag Side wall 313 Folded portion 314 Adhesive portion 32 Reinforced sheath 34 Flexible sheet material 42, 42 Both side ends of shape retaining means 5 Seam

Claims (4)

A bulk bag having an upper opening and capable of being suspended,
An external bag that is installed outside and forms an outer peripheral wall;
An inner bag installed in the outer bag and serving as an inner peripheral wall;
A plurality of shape holding means attached to the inside of the inner peripheral wall,
The inner peripheral wall is formed with a plurality of pleats extending vertically at least outside thereof, and is connected to the outer peripheral wall by the plurality of pleats.
Each of the plurality of pleat portions includes a bent portion that extends outward from the wall surface of the inner peripheral wall and a folded portion that extends from the end portion of the bent portion and extends in the opposite direction. Has formed a U-shape,
The folded portion and the folded portion in each pleat portion are both fixed to the outer peripheral wall,
A plurality of connecting portions are formed on the outer peripheral wall so as to correspond to the plurality of pleat portions at least on the inside thereof,
Each of the plurality of pleat portions is fixed to the connecting portion corresponding to the pleat portion,
In each pleat portion in the inner peripheral wall, an adhesive portion is formed on the inner side of the fixed portion with the connecting portion in the outer peripheral wall corresponding to the pleat portion,
Each of the shape holding means is inserted and fixed in one U-shaped groove of each of the plurality of pleats on the inner peripheral wall ,
The outer peripheral wall itself includes a plurality of U-shaped bent portions extending outwardly from the wall surface of the outer peripheral wall and bent portions extending in opposite directions by bending from the end portions of the bent portions. A mold pleat portion is formed, thereby forming the plurality of connecting portions, and the plurality of pleat portions in the inner peripheral wall are respectively U-shaped pleat portions of the outer peripheral wall corresponding to the pleat portion. A bulk bag, which is inserted into a groove and fixed . Each of the shape holding means is inserted into one U-shaped groove of the plurality of pleats on the inner peripheral wall, and adheres together with the folded part and the folded part of the U-shaped pleat. bulk bag according to claim 1, characterized in Tei Rukoto. 3. The bulk bag according to claim 1, wherein each of the pleat portions on the inner peripheral wall is formed on a flexible sheet material attached to the outside of the inner peripheral wall. Each corrugation in said inner peripheral wall, according to claim 1 to 3 in which the region between the U-shaped fold portion in the outer peripheral wall correspond with the corrugation, wherein the reinforcing sheath is pinched The bulk bag as described in any one of.