JP3182352U - Flexible container and its outer bag - Google Patents

Abstract

An object of the present invention is to provide a flexible container in which an inner bag does not droop drastically even when contents are dropped and discharged, and an outer bag used therefor.
A flexible container (1) having an outer bag (2) and an inner bag (3), wherein the inner surface of the outer bag (2) and the outer surface of the inner bag (3) are bonded to each other by a double-sided adhesive tape (15a, 15b). And an outer bag of a flexible container having double-sided adhesive tapes 16a, 16c, etc. with one adhesive surface bonded to the inner surface thereof.
[Selection] Figure 1

Description

  The present invention relates to a flexible container and an outer bag thereof. Specifically, in a flexible container having an outer bag and an inner bag, when the contents are dropped and discharged from the lower opening of the flexible container, the inner bag is released from the lower opening. The present invention relates to a flexible container that prevents drooping and an outer bag used for the flexible container.

  Conventionally, flexible containers have been widely used as containers for transporting and storing granular materials and powders. A flexible container is a very convenient container because it is relatively low cost and light in weight, and can be folded when not in use. However, depending on the type of contents to be transported and stored, there is a risk that the contents may absorb moisture and deteriorate due to moisture that permeates the material constituting the flexible container or moisture that permeates from the seam of the fabric material. For this reason, when transporting and storing hygroscopic contents, it is suggested to use a flexible container that prevents permeation and permeation of moisture using a rubberized material or resin film that has improved waterproofness. Has been. However, a flexible container manufactured using a rubberized material, a resin film, or the like is expensive, and there is a disadvantage that the original usability of the flexible container is lost.

  In order to eliminate the above drawbacks, a flexible container with improved waterproofness has been proposed by adopting a double structure of an outer bag and an inner bag made of a material that does not allow moisture to pass through (for example, Patent Document 1, 2). Such a flexible container with a double structure is hygroscopic because it simply inserts an inner bag made of nylon or the like that does not allow moisture to penetrate inside the outer bag made of a material such as tarpaulin. A flexible container suitable for transportation and storage of contents can be manufactured at low cost, and an advantage is obtained that it can be used as a so-called one-way flexible container for one-time use.

  However, according to the experience of the present inventors, in the flexible container having a double structure in which the inner bag is simply inserted inside the outer bag as described above, the contents are dropped from the lower opening of the flexible container, At the time of discharging, the inner bag may be separated from the outer bag by being dragged by the flow of the contents, and may drastically drop from the lower opening, which may hinder the work.

Japanese Patent Laid-Open No. 2005-22736 JP 2012-201407 A

  The present invention has been made to eliminate the disadvantages of the conventional double-structure flexible container as described above, and is suitable for carrying and storing hygroscopic contents. To provide a flexible container in which the inner bag does not drastically drop from the lower opening even when contents are dropped and discharged from the lower opening of the flexible container, and an outer bag used for such a flexible container. Is an issue.

  As a result of repeated trial and error to solve the above-mentioned problems, the present inventors have found that the outer bag constituting the flexible container and the inner bag inserted for moisture prevention are attached to the double-sided adhesive tape at an appropriate position. It has been found that the drooping of the inner bag can be greatly reduced even when the contents are dropped and discharged by bonding with.

  That is, the present invention provides a flexible container having an outer bag and an inner bag, wherein the inner surface of the outer bag and the outer surface of the inner bag are bonded to each other by a double-sided adhesive tape. It solves the problem.

  As described above, since the inner surface of the outer bag and the outer surface of the inner bag are bonded with the double-sided adhesive tape in the flexible container of the present invention, the inner bag can be removed even when the contents are dropped and discharged from the lower opening of the flexible container. There is no separation from the outer bag, and the inner bag does not droop greatly from the lower opening.

  In principle, the position where the inner surface of the outer bag and the outer surface of the inner bag are bonded can be any position as long as the inner bag does not detach from the outer bag when the contents are dropped or discharged. From the standpoint of effectively preventing the inner bag from detaching from the outer bag and drooping when discharged, it is preferable that the outer bag is bonded to the outer surface of the inner bag at least at the inner surface of the trunk portion and the bottom portion. In addition, from the viewpoint of more effectively preventing the inner bag from detaching from the outer bag and dropping when the contents are dropped and discharged, the bonding position between the inner surface of the outer bag and the outer surface of the inner bag is: It is preferably selected at a position higher than ½ of the height of the body portion of the outer bag when the contents are filled.

  Moreover, this invention solves said subject by providing the outer bag of the flexible container which has the double-sided adhesive tape by which one adhesive surface was adhere | attached on the inner surface. That is, when the contents to be transported and stored inside the inner bag of the flexible container are filled, the inner bag expands due to the pressure of the contents and comes into close contact with the inner surface of the outer bag. By attaching a double-sided adhesive tape to the position in advance with one of the adhesive surfaces attached, after inserting the inner bag into the outer bag, the inner bag and outer bag are filled with the contents in the inner bag. And the outer surface of the inner bag can be adhered to a predetermined position on the inner surface of the outer bag.

  As described above, the outer surface of the inner bag is preferably bonded to at least the trunk and the inner surface of the bottom of the outer bag, and the position of the barrel of the outer bag that is bonded to the outer surface of the inner bag is filled with the contents. It is preferable to be selected at a position higher than ½ of the height of the body portion of the outer bag. Therefore, the double-sided adhesive tape is preferably attached to the inner surface of the outer bag by adhering one adhesive surface to at least the inner surface of the outer bag and the bottom portion. It is more preferable that the position is higher than ½ of the height of the body portion of the outer bag when filled.

  The flexible container of the present invention is suitable for transporting and storing granular or powdery materials that may be denatured by moisture absorption. For example, refractory materials containing MgO, CaO, etc., in particular MgO and CaO. It is suitable for transporting and storing spray materials and stamp materials that are manufactured using the main ingredients. Among them, spray materials manufactured using MgO, CaO, etc. as main raw materials, that is, spray materials sprayed on the inner wall and floor surface of electric furnaces, ladles, tundishes, etc. Since silicates such as potassium, phosphates such as sodium phosphate and potassium phosphate are blended, and these binders also absorb moisture and easily change in quality, the flexible container of the present invention stores and transports these spray materials. It is particularly suitable for use.

  According to the flexible container of the present invention, even if the inner bag is dropped and discharged from the lower opening with an extremely simple configuration by simply bonding the inner bag to the inner surface of the outer bag with a double-sided adhesive tape, There is an advantage that it does not droop greatly and does not hinder the work. Moreover, according to the outer bag of the flexible container of the present invention, the inner bag is embedded in the outer bag by attaching one side of the double-sided adhesive tape to a predetermined position on the inner surface of the outer bag. After that, just filling the contents in the inner bag, the inner bag naturally swells and comes into close contact with the inner surface of the outer bag, and the inner surface of the outer bag and the outer surface of the inner bag are bonded together. The advantage that can be manufactured is obtained. Since the flexible container of the present invention can be manufactured at a low cost with a very simple structure, it can be used as a disposable one-way flexible container, like a conventional double-structure flexible container having an outer bag and an inner bag, to prevent moisture absorption. It is useful for storage and transportation of granular or powdery materials that need to be protected against contamination.

It is a front view which shows an example of the flexible container of this invention. It is a bottom view of FIG. It is a front view which shows another example of the flexible container of this invention. FIG. 4 is a bottom view of FIG. 3.

  Hereinafter, the present invention will be described in detail with reference to the drawings. However, the present invention is not limited to the illustrated one.

  FIG. 1 is a front view showing an example of the flexible container of the present invention. In FIG. 1, reference numeral 1 denotes a flexible container of the present invention, and the flexible container 1 includes an outer bag 2 and an inner bag 3 housed in the outer bag 2. The outer bag 2 should just be comprised with the raw material similar to the raw material used with a normal one-way flexible container, for example, is comprised using sheet materials, such as a vinyl chloride tarpaulin and EVA tarpaulin. The inner bag 3 should just be comprised with the material which does not permeate | transmit moisture, for example, is comprised with sheet-like materials, such as nylon.

  In FIG. 1, reference numeral 4 denotes an upper cylinder formed of the same material as the outer bag 2, and a lower opening of the upper cylinder 4 is fixed to an upper opening of the outer bag 2, and an upper opening of the upper cylinder 4 5 forms a filling port for the contents. A strap 6 is attached to an intermediate portion of the upper cylinder 4, and the upper cylinder 4 draws the strap 6, closes the middle portion thereof, winds the tip portion, and closes the upper opening of the outer bag 2. It is configured so that it can be pushed inward.

  Reference numerals 7a, 7b, 7c and 7d denote lids. In the flexible container 1 of this example, the lids 7a, 7b, 7c and 7d divided into four in the circumferential direction (however, the lid 7d is shown in FIG. 1). It is attached to the outside of the upper cylinder 4 around the upper opening of the outer bag 2. Reference numeral 8 denotes a tightening rope inserted through the tip portions of the lid bodies 7a, 7b, 7c, 7d. As described above, the middle portion of the upper cylindrical body 4 is tied and the string 6 is drawn and closed, the distal end portion of the upper cylindrical body 4 is wound and pushed into the upper opening of the outer bag 2, and then the fastening rope 8 is The upper opening of the outer bag 2 is drawn by closing the lids 7a, 7b, 7c, 7d toward the center of the opening and covering the upper cylinder 4 pushed into the upper opening of the outer bag 2. Is blocked.

  9 is a lower cylinder formed of the same material as the outer bag 2, and the lower cylinder 9 is the same member as the upper cylinder 4 except that the upper and lower sides are reversed. That is, the upper opening of the lower cylinder 9 is fixed to the lower opening of the outer bag 2, and the lower opening 10 of the lower cylinder 9 forms a discharge port for dropping and discharging the contents. A tie string 11 is attached to the middle part of the lower cylinder 9, and the lower cylinder 9 draws the tie string 11, closes the middle part thereof, wraps the tip part, and closes the lower opening of the outer bag 2. It is configured so that it can be pushed inward.

  12a, 12b, 12c, and 12d are lid bodies, and the lid bodies 12a, 12b, 12c, and 12d divided into four in the circumferential direction are similar to the lid bodies 7a, 7b, 7c, and 7d described above (however, The lid 12d is not shown in FIG. 1) and is attached to the outside of the lower cylinder 9 around the lower opening of the outer bag 2. Reference numeral 13 denotes a tightening rope inserted through the tip portions of the lid bodies 12a, 12b, 12c, and 12d. The middle part of the lower cylinder 9 is tied and the string 11 is drawn and closed, the tip of the lower cylinder 9 is wound and pushed into the inside of the lower opening of the outer bag 2, and then the fastening rope 13 is drawn and the lid 12a, 12b, 12c, 12d are closed toward the center of the opening, and the lower opening of the outer bag 2 is closed by covering the lower side of the lower cylindrical body 9 pushed into the lower opening of the outer bag 2. . 14 and 14 are suspension belts for hooking crane hooks or the like.

  In this example, the inner bag 3 has the same shape as the outer bag 2 including the upper cylindrical body 4 and the lower cylindrical body 9, and the inner bag 3 has an upper end portion and a lower end portion at the upper portion, respectively. The outer bag 2 is housed in a state of being positioned inside the cylindrical body 4 and the lower cylindrical body 9. As will be described later, the body portion of the outer bag 2 of the inner bag 3 so that the outer surface of the inner bag 3 is in close contact with the inner surface of the outer bag 2 when the contents to be transported and stored are filled in the inner bag 3. The diameter of the portion corresponding to is preferably formed slightly larger than the diameter of the body portion of the outer bag 2. In this example, the upper end portion and the lower end portion of the inner bag 3 corresponding to the upper cylindrical body 4 and the lower cylindrical body 9 are formed to have a smaller diameter than the portion corresponding to the trunk portion of the outer bag 2. The inner bag 3 may be formed in a cylindrical shape having the same diameter from the upper end to the lower end.

  15a, 15b, 15c, 15d (where 15d is not shown in FIG. 1) is a double-sided adhesive tape that bonds the inner surface of the body of the outer bag 2 and the outer surface of the inner bag 3, 16a, 16b, 16c, 16d (However, 16b and 16d are not shown in FIG. 1) is a double-sided adhesive tape that bonds the inner surface of the bottom surface of the outer bag 2 and the outer surface of the inner bag 3. As shown in FIG. 1, the double-sided adhesive tapes 15a to 15d for bonding the inner surface of the body portion of the outer bag 2 and the outer surface of the inner bag 3 have the height of the body portion of the outer bag 2 when the contents are filled. Are attached at a position higher than (1/2) H. For this reason, the inner surface of the body portion of the outer bag 2 is bonded to the outer surface of the inner bag 3 at a position higher than ½ of the height of the body portion of the outer bag 2 when the contents are filled.

  2 is a bottom view of FIG. 1, and the same members as those in FIG. 1 are denoted by the same reference numerals. As shown in FIG. 2, the double-sided adhesive tapes 15 a to 15 d for bonding the inner surface of the body portion of the outer bag 2 and the inner bag 3 are attached to positions that divide the inner periphery of the body portion of the outer bag 2 into four equal parts. . In addition, double-sided adhesive tapes 16a to 16d for bonding the inner surface of the bottom surface of the outer bag 2 and the inner bag 3 are also attached to the bottom surface of the outer bag 2 at positions facing each other with an interval of 90 degrees. Thereby, the outer bag 2 and the inner bag 3 are bonded to each other at the inner surface of the body portion and the bottom surface of the outer bag 2 and the outer surface of the inner bag 3. The shapes and mounting positions of the double-sided adhesive tapes 15a to 15d and 16a to 16d shown in FIGS. 1 and 2 are merely examples, and the contents of the body and the bottom of the outer bag 2, preferably the contents in the body. As long as the outer bag 2 and the inner bag 3 are bonded to each other at a position higher than 1/2 of the height of the outer bag 2 and the bottom surface when the outer bag 2 and the inner bag 3 are bonded, the double-sided adhesive tapes 15a to 15d and 16a to 16d The shape and mounting position are not limited to those shown in the figure.

  The flexible container shown in FIGS. 1 and 2 is manufactured as follows. That is, for example, the double-sided adhesive tapes 15a to 15d and 16a to 16d are attached to a predetermined position on the inner surface of the outer bag 2 of a commonly used one-way flexible container with one of the adhesive surfaces, and the double-sided adhesive tape is attached to the outside. Prepare bag 2. Next, the inner bag 3 is housed inside the prepared outer bag 2, the tie string 11 is drawn and drawn while the lower end portion of the inner bag 3 is positioned inside the lower cylinder 9, and the lower cylinder 9 Is closed, and the tip of the lower cylindrical body 9 is wound together with the lower end of the inner bag 3 and pushed into the lower opening of the outer bag 2, and then the fastening rope 13 is drawn to center the lids 12a to 12d at the center of the opening. Then, the lower opening of the outer bag 2 is closed.

  Instead of drawing and lowering the lower cylindrical body 9 together with the lower end of the inner bag 3, only the lower cylindrical body 9 is tied and squeezed and closed with the string 11 without the inner bag 3 being installed. You may make it push into the opening part inside. Next, the inner bag 3 may be inserted into the outer bag 2 with the bottom end folded and bottomed after the lids 12a to 12d are closed toward the center of the opening by pulling down the fastening rope 13.

  After closing the lower opening of the outer bag 2, the contents to be transported and stored are put into the inner bag 3 from the upper opening 5 of the upper cylinder 4 and filled. When the contents are filled, the bottom surface of the inner bag 3 is in close contact with the bottom surface of the outer bag 2, and the inner surface of the bottom surface of the outer bag 2 and the outer surface of the bottom surface of the inner bag 3 are bonded to each other by double-sided adhesive tapes 16a to 16d. . Further, as the filling of the contents proceeds, the inner bag 3 expands and comes into close contact with the body portion of the outer bag 2. Thereby, the inner surface of the trunk | drum of the outer bag 2 and the inner surface of the inner bag 3 are mutually adhere | attached by the double-sided adhesive tapes 15a-15d. Thus, the flexible container 1 of the present invention is manufactured.

  Instead of adhering the outer bag 2 and the inner bag 3 by filling the contents as described above, a predetermined portion of the outer surface of the inner bag 3 can be attached to the inner surface of the outer bag 2 without being filled with the contents. Alternatively, the outer bag 2 and the inner bag 3 may be adhered to the double-sided adhesive tapes 15a to 15d and 16a to 16d to produce the flexible container 1 of the present invention. In any case, when the filling of the contents is finished, the upper cylinder 4 is closed by the strap 6 together with the upper end portion of the inner bag 3 positioned therein, and the lids 7a to 7d are also closed by the fastening rope 8. Thus, the upper opening of the outer bag 2 is closed.

  When transportation and storage are completed, the lower opening of the outer bag 2 of the flexible container 1 of the present invention is opened by a procedure reverse to the above. That is, after loosening the tightening rope 13 and opening the lids 12a to 12d, when the lower string 9 is opened by loosening the binding string 11, the lower opening of the outer bag 2 is opened and filled. An object falls and is discharged from the lower opening of the outer bag 2. At this time, since the outer surface of the inner bag 3 is bonded to the inner surface of the body portion and the bottom surface of the outer bag 2 with the double-sided adhesive tapes 15a to 15d and 16a to 16d, the inner bag 3 is dropped and discharged as the contents are dropped. Does not hang down from the lower opening of the outer bag 2.

  3 is a front view showing another example of the flexible container of the present invention, FIG. 4 is a bottom view thereof, and the same members as those in FIGS. 1 and 2 are denoted by the same reference numerals. The difference between the flexible container 1 of this example and the flexible container 1 shown in FIGS. 1 and 2 is that, in the flexible container 1 of this example, the outer bag 2 has a bottom, and the lower cylinder 9 and the lower lid 12a. In addition to the double-sided adhesive tapes 16a to 16d, on the inner surface of the bottom surface of the outer bag 2, there are four sheets at positions that constitute each side of the square at a location closer to the center of the bottom surface. The double-sided adhesive tapes 17a to 17d are attached. Except for these differences, it is the same as the flexible container 1 shown above, and also in the flexible container 1 of this example, the inner surface of the outer bag 2 is bonded to the outer surface of the inner bag 3 at the trunk and the bottom surface. . Further, the position where the inner surface of the body portion of the outer bag 2 is bonded to the outer surface of the inner bag 3 is set to H, which is the height of the body portion of the outer bag 2 when the contents are filled. High position.

  The shapes and mounting positions of the double-sided adhesive tapes 15a to 15d, 16a to 16d, and 17a to 17d shown in FIGS. 3 and 4 are merely examples, and are preferably the trunk and bottom of the outer bag 2, preferably the trunk. As long as the outer bag 2 and the inner bag 3 are bonded to each other at a position above and ½ the height of the outer bag 2 when the contents are filled in the portion, the double-sided adhesive tapes 15a to 15d, 16a Needless to say, the shapes and mounting positions of ˜16d and 17a to 17d are not limited to those shown in the drawing.

  The flexible container shown in FIGS. 3 and 4 is manufactured as follows. That is, for example, the double-sided adhesive tapes 15a to 15d, 16a to 16d, and 17a to 17d are attached to a predetermined position on the inner surface of the outer bag 2 of a commonly used one-way flexible container by adhering one of the adhesive surfaces to the double-sided adhesive. The outer bag 2 to which the tape is attached is prepared. Next, the inner bag 3 with its lower end folded is housed inside the prepared outer bag 2. In the flexible container 1 of the present example, the outer bag 2 has a bottom and does not have a lower opening. Therefore, it is not necessary to close the lower opening, and the inner bag 2 has a bottom by folding the lower end. Just decorate.

  After the inner bag 3 is built in the outer bag 2, the contents to be transported and stored are put into the inner bag 3 from the upper opening 5 of the upper cylinder 4 and filled. When the contents are filled, the bottom surface of the inner bag 3 is in close contact with the bottom surface of the outer bag 2, and the inner surface of the bottom surface of the outer bag 2 and the outer surface of the bottom surface of the inner bag 3 are attached by double-sided adhesive tapes 16 a to 16 d and 17 a to 17 d. Glued together. Further, as the filling of the contents proceeds, the inner bag 3 expands and comes into close contact with the body portion of the outer bag 2. Thereby, the inner surface of the trunk | drum of the outer bag 2 and the inner surface of the inner bag 3 are mutually adhere | attached by the double-sided adhesive tapes 15a-15d. Thus, the flexible container 1 of the present invention is manufactured.

  Instead of adhering the outer bag 2 and the inner bag 3 by filling the contents as described above, a predetermined portion of the outer surface of the inner bag 3 can be attached to the inner surface of the outer bag 2 without being filled with the contents. Alternatively, the outer bag 2 and the inner bag 3 may be adhered to each other with the double-sided adhesive tapes 15a to 15d, 16a to 16d, and 17a to 17d, and the flexible container 1 of the present invention may be manufactured. In any case, when the filling of the contents is finished, the upper cylinder 4 is closed by the strap 6 together with the upper end portion of the inner bag 3 positioned therein, and the lids 7a to 7d are also closed by the fastening rope 8. Thus, the upper opening of the outer bag 2 is closed.

  In order to discharge the contents from the flexible container 1, the bottom surface of the outer bag 2 may be torn together with the inner bag 3. The filled contents are dropped and discharged from the cut opening. At this time, since the outer surface of the inner bag 3 is adhered to the inner surface of the body and bottom surface of the outer bag 2 with the double-sided adhesive tapes 15a to 15d, 16a to 16d, and 17a to 17d, the contents can be dropped and discharged. At the same time, the inner bag 3 does not hang down from the lower opening of the outer bag 2.

  As described above, in the flexible container 1 of the present invention, since the outer bag 2 and the inner bag 3 are bonded to each other with the double-sided adhesive tape, the inner bag 2 can be removed even if the contents are dropped and discharged from the lower opening. Does not hang down from the lower opening and does not hinder the work. In addition, by preparing the outer bag 2 that has one side bonded to a predetermined position and attached with a double-sided adhesive tape in advance, the flexible container 1 of the present invention can be easily manufactured and used as needed at the content filling site. It becomes possible.

  As described above, according to the flexible container of the present invention, it is possible to transport and store hygroscopic contents using an inexpensive one-way flexible container, and the inner bag hangs down when the contents are discharged. Will not be disturbed. Further, according to the outer bag of the present invention, the flexible container of the present invention as described above can be easily manufactured at the work site. The present invention makes it easier to transport and store granular materials and powders in a flexible container, and has extremely excellent industrial applicability.

DESCRIPTION OF SYMBOLS 1 Flexible container 2 Outer bag 3 Inner bag 4 Upper cylindrical body 5 Upper opening part 6, 11 Tie string 7a-7d, 12a-12d Lid body 8,13 Fastening rope 9 Lower cylindrical body 10 Lower opening part 14 Hanging belt 15a-15d , 16a-16d, 17a-17d Double-sided adhesive tape

Claims (6)

  A flexible container having an outer bag and an inner bag, wherein an inner surface of the outer bag and an outer surface of the inner bag are bonded to each other by a double-sided adhesive tape.   The flexible container according to claim 1, wherein the outer bag is bonded to the outer surface of the inner bag at least on the inner surface of the body portion and the bottom portion.   3. The bonding position between the inner surface of the body portion of the outer bag and the outer surface of the inner bag is a position higher than ½ of the height of the body portion of the outer bag when the contents are filled. The flexible container described.   An outer bag of a flexible container having a double-sided adhesive tape having one adhesive surface bonded to its inner surface.   The outer bag of a flexible container according to claim 4, wherein the double-sided adhesive tape is adhered to at least the inner surface of the trunk and the bottom.   6. The flexible container according to claim 5, wherein the position where the double-sided adhesive tape is bonded to the inner surface of the barrel is a position higher than ½ of the height of the barrel when the contents are filled. Outer bag.

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