JP2014080202A - Bag which is easily opened - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bag which is easily opened,which has simple structure while fully satisfying perfect prevention of leakage of particulate matters and necessary strength,and which can be opened easily and perfectly.SOLUTION: One of an upper paper 2a and a lower paper 2b of a paper-like cylinder 2 is extended along a fold, and an extension surface is formed having triangle folding parts and an opening 7 at both sides and its central part. Folding lines 9a and 9b closing the opening 7 fully are formed at the upper paper 2a and the lower paper 2b. The lower paper 2b is folded toward the opening 7 side along the folding line 9b and stuck at the triangle folding parts of both sides. A folding piece 10 having a predetermined width is formed at an end side of the upper paper 2a and the upper paper 2a is folded toward the opening 7 side along the folding line 9a to close the opening 7 by sticking the folding piece 10 on the lower paper 2b in an unstuck state. A decorative paper 12 with an opening tape 11 is stuck on the upper paper 2a and the lower paper 2b and the opening tape 11 is placed outside of the folding piece 10.

Description

  The present invention relates to a bag that can be easily opened to store powders derived from foods such as rice, wheat, corn starch and starch, feed, plastic resin, cement, lime, carbon black and the like. More specifically, the present invention relates to an easy-to-open bag that has a simple structure but completely prevents leakage of the contents, and has excellent strength and can be opened easily and completely.

  As a conventional easy-to-open bag, as shown in FIG. 11, at the time of closing, the opening tape is positioned so as to be positioned on the lower horizontal folding line folding part 51 where the upper and lower horizontal folding line folding parts 50 and 51 do not overlap each other. The outer patch 53 with 52 is affixed to the bottom, and an easy-peeling paste is applied to the back of the upper and lower horizontal folding lines 50 and 51, and further, the outer patch 53 is fixed to the back of the outer side in the longitudinal direction. In this case, an outer patch 53 is applied to the bottom by applying an easily peelable strip 55 to the inside of the strip 54 (see, for example, Patent Document 1).

  Further, as shown in FIG. 12, triangular folding portions 62 (63) are formed at both corners of one open end 61 of the paper tube 60 that is flatly folded, and the paper tube 60 is folded in this state. One of the formed upper paper 64 and lower paper 65 is opened to form a development surface 66, and a folding line 68 is added to the upper paper 64 and the lower paper 65 to cover the central opening 67 of the development surface 66. An inner patch 70 with a stripped piece 69 is formed on the development surface 66 with an easily peelable adhesive 71, crossing both triangular folds 62, 63 of the surface 66, covering the central opening 67, and protruding the folding line 68 outward. An easy-to-open bag is known in which an opening-side opening 72 is formed, an upper paper 64 and a lower paper 65 are folded and bonded along the folding line 68, and an outer patch with an opening tape is attached thereon. (For example, patent text See 2).

  Further, as shown in FIG. 13, triangular folding portions 62 and 63 are formed at both corners of one open end 61 of the paper tube 60 folded flat, and the paper tube 60 is formed by being folded in this state. One of the upper paper 64 and the lower paper 65 is opened along the first folding line 73 to form a development surface 66, and the upper paper 64 and the lower paper 65 are inward along the second folding line 74 parallel to the first folding line 73. The bottom part is formed by folding and laminating, and in the process of the bottom part, the folded parts are easily pasted together, and the long side extends over the triangular folding parts 62 and 63 in the center of the development surface 66, and the short side is the second folding line. An easily opened bag is known in which an inner patch 70 exceeding 74 is bonded linearly along the outer side of one second folding line 74, and an outer patch with an opening tape is attached on the inner patch 70 (for example, And Patent Document 3).

  Further, as shown in FIG. 14, triangular folding portions 62 and 63 are formed at both corners of one open end 61 of the paper tube 60 folded flat, and the paper tube 60 is formed by being folded in this state. One of the upper paper 64 and the lower paper 65 is opened along the first folding line 73 to form a development surface 66, and the upper paper 64 and the lower paper 65 are inward along the second folding line 74 parallel to the first folding line 73. A closed cylinder which is folded and laminated to form the bottom, and is tightly fitted to the upper paper 64 and the lower paper 65 inside the upper paper 64 and the lower paper 65 at a length exceeding the first folding line 73 from their edges. An easy-to-open bag with a valve is known in which the bodies 75 and 76 are pasted with their edges aligned with the edges of the upper paper 64 and the lower paper 65 (for example, Patent Document 4). reference).

Japanese Utility Model Publication 1-26598 JP 2004-307008 A JP-A-9-142490 JP 7-52957 A

  When the outer patch 53 is cut by the opening tape 52 in the bag that is easy to open in Patent Document 1, the outer patch 53 and the lower horizontal folding line folding part 51 and the diagonal folding line folding part are glued with a glue that is easy to peel off. Therefore, the outer patch 53 and the upper horizontal folding line folding part 50 cut together can be easily separated from the lower horizontal folding line folding part 51 and the diagonal folding line folding part. Furthermore, since the lower horizontal folding line folding part 51 is also glued to the diagonal folding line folding part with an easy peel, it can be easily peeled off from the diagonal folding line folding part and can be completely opened. However, in order to completely open the bag, first, the outer patch 53 is cut by the opening tape 52, the outer patch 53 and the upper horizontal folding line folding part 50 are peeled off, and the lower horizontal folding line folding part 51 is further removed. However, if it is not peeled off, there is a possibility that a two-stage inconvenience that it cannot be completely opened occurs. In addition, if the folding widths of the horizontal folding line folding sections 50 and 51 are narrow, the sealing performance may be reduced and the contents may leak.

  In the bag easy to open of Patent Document 2, the outer patch is cut with an opening tape, the upper paper 64 and the lower paper 65 are peeled off to expose the inner patch 70, and the inner patch 70 is peeled off and peeled off by the strip 69. it can. However, in order to open this easy-to-open bag, as described above, there is a possibility that the inconvenience of becoming a three-stage structure arises. In addition, it is necessary to provide a separate inner patch 70 in order to ensure sealing performance.

  In the easy-open bag of Patent Document 3, the outer patch is cut with an opening tape, the upper paper 64 and the lower paper 65 are barely exposed, the upper paper 64 and the lower paper 65 are peeled off, and the inner patch 70 is barely exposed. If the inner patch 70 side of the bag that is easy to open is directed downward, the inner patch 70 is opened by opening the other side except the one side to which the inner patch 70 is firmly adhered due to the weight of the contents. Can do. However, in order to open this easy-to-open bag, as described above, it becomes a two-stage structure, and whether or not to open finally depends on the weight of the contents, Inconvenience may occur. In addition, it is necessary to provide a separate inner patch 70 in order to ensure sealing performance.

  The easy-opening bag of Patent Document 4 can be opened by peeling the upper paper 64 and the lower paper 65 by cutting the outer patch with an opening tape and exposing the upper paper 64 and the lower paper 65. However, this easy-to-open bag needs to be provided with separate closed cylinders 75 and 76 in order to ensure sealing performance. Furthermore, the provision of the closed cylinders 75 and 76 Difficult to set in bag making machine.

  Therefore, the object of the present invention is easy to open, which can be easily and completely opened with a simple structure, while being sufficiently satisfied with respect to complete prevention of leakage and necessary strength of the granular material. To provide a bag.

The present invention has been proposed in order to achieve the above object, and is characterized by having the following configuration.
That is, according to the present invention, a fold parallel to this is placed at a position sufficiently away from the opening end at one opening end of the flatly folded paper tube, and both corners of the opening end are folded to the fold, One of the upper paper and the lower paper formed in this state is developed along the crease to form a development surface having triangular folding portions and openings at both sides and the center thereof, and the upper paper and the lower paper on the development surface are formed. The paper is folded to the opening side to sufficiently close the opening, and a crease line parallel to the crease is attached, and the lower paper is folded to the opening side along the crease line to fold the triangles on both sides. The two sheets are bonded to each other, and the edge of the upper paper is folded to the opening side with a predetermined width in parallel with the folding line to form a folded piece, and the upper paper in this state is formed along the folding line. Folded to the opening side and the folded piece in a non-sticking state The opening is closed by sticking on paper, and a decorative paper with an opening tape is attached on the upper paper and the lower paper, and the opening tape is located outside the folded piece. An easy-to-open bag is provided.

  Further, according to the present invention, the position sufficiently distant from the opening end in the fold is 1 at most with respect to the width dimension W of the paper tube that is flatly folded from one opening end of the paper tube. An easily opened bag that is / 3 W or less is provided.

  Moreover, according to this invention, the width dimension w of the said bending piece is in the range of 10-20 mm, and the bag which is easy to open is provided.

The operation of the first problem solving means is as follows.
That is, the opening at the center of the development surface is sufficiently closed by folding the upper paper and the lower paper, and the lower paper is bonded between the triangular folding portions on both sides, and the upper paper is folded on the lower paper. Unwrapped, unwrap the decorative paper with the opening tape located outside the folded piece, bare the folded piece, grasp the unfolded folded piece with your fingers and push open. The contents can be taken out by opening the opening.

  The second problem solving means operates as follows: the upper paper and the lower paper are opened when the crease is located at the maximum 1/3 W of the width dimension W of the paper tube from the opening end of the paper tube. The opening is sufficiently closed by folding to the side, and leakage of the contents can be prevented.

  In addition, the third problem solving means has an effect that the folded piece width w is in the range of 10 to 20 mm, so that the folded piece in the non-attached state can be grasped with fingers and the upper sheet is pushed open. The opening can be opened.

  According to the bag of the present invention that is easy to open, it is easy and completely open, while having a simple structure, completely preventing leakage of the powder that is the contents, and sufficiently satisfying the required strength. There is an effect that can be performed.

  Moreover, according to the bag which is easy to open according to the present invention, in addition to the above-described effect, there is an effect of ensuring complete prevention of leakage of the granular material which is the contents.

  Moreover, according to the bag which is easy to open according to the present invention, in addition to the above effects, there is an effect that the opening can be reliably opened.

It is a top view which shows the manufacture state of the easy-to-open bag which shows embodiment of this invention shown in Example 1. FIG. It is a top view which similarly shows the manufacture state of the said bag. It is a top view which similarly shows the manufacture state of the said bag. Similarly, it is a plan view showing a comparison between the manufacturing state of the bag (lower figure) and the manufacturing state of the conventional example (upper figure). It is a top view which similarly shows the manufacture state of the said bag. Similarly, it is a plan view showing a comparison between the manufacturing state of the bag (lower figure) and the manufacturing state of the conventional example (upper figure). It is a top view which similarly shows the manufacture state of the said bag. It is sectional drawing which follows the VIII-VIII line of FIG. It is a perspective view which shows the utilization condition of the bag of this invention. It is a perspective view which shows the utilization condition of the bag of this invention. It is a perspective view which shows a prior art example. It is a perspective view which shows a prior art example. It is a top view which shows a prior art example. It is a top view which shows a prior art example.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

In the drawing, reference numeral 1 denotes a bag that can be easily opened, and this bag 1 that is easy to open has a fold line 4 parallel to the opening end 3A of the paper tube 2 that is flatly folded from the opening end 3a. Attached to a distant position, both corners C1 and C1 of the opening end 3a are folded up to the crease 4, and one of the upper paper 2a and the lower paper 2b formed in this state is developed along the crease 4, and on both sides and the center thereof A development surface 8 having triangular folding portions 5 and 6 and an opening 7 is formed, and the upper paper 2a and lower paper 2b of the development surface 8 are folded toward the opening 7 to sufficiently close the opening 7 and The folding lines 9a and 9b parallel to the crease 4 are attached, the lower paper 2b is folded along the folding lines 9b toward the opening 7, and the triangular folding parts 5 and 6 on both sides are bonded together (see FIG. 3).
Next, the edge of the upper paper 2a is folded to the opening 7 side with a predetermined width w parallel to the folding line 9a to form a folded piece 10, and the upper paper 2a in this state is turned into the bending line 9a. Attached to the lower paper 2b in a state where it is folded along the side of the opening 7 and the folded piece 10 is not pasted, the opening 7 is pasted together, and the decorative paper with the opening tape 11 on the upper paper 2a and the lower paper 2b. 12 (see FIG. 7) are bonded together, and the opening tape 11 is positioned outside the folded piece 10 of the upper paper 2a.

  The paper tube 2 is selected to have an arbitrary diameter and length according to the purpose of use. In this embodiment, two sheets are used, but the present invention is not limited to this. Multiple layers are also acceptable. The material of the paper tube 2 is not limited to kraft paper, and is not particularly limited as long as it has a deaeration property and has a predetermined strength, and a resin sheet, a paper sheet affixed with a resin sheet, or the like is used. Is done. In addition, the material of the decorative paper 12 or the like is appropriately selected as in the case of the paper tube 2.

The easy-open bag 1 having the above-described configuration is produced as follows.
First, for the two or more paper-like cylinders 2, the diameter and length are arbitrarily selected according to the purpose of use. Then, as shown in FIG. 1, the selected paper tube 2 is collapsed, and the open end 3 a on the one open end 3 </ b> A side of the folded paper tube 2, that is, on the outlet side of the contents. The crease 4 is attached in parallel with the crease 4 at this time at a position P sufficiently away from the open end 3a. Specifically, the position P that is sufficiently separated from the opening end 3 a in the fold line 4 is 1 at the maximum of the width W of the paper tube 2 that is flatly folded from one opening end 3 a of the paper tube 2. / 3W or less is good. Theoretically, the position P can be up to 1/2 W, but the capacity of the bag becomes very small with respect to the amount of material used for the paper tube 2 and is not economical. Conversely, when the position P is 1/5 W or less, even if the upper paper 2a and the lower paper 2b are folded to the opening 7 side, the opening 7 is not sufficiently blocked, and the contents may leak. .

  In the lower diagram of FIG. 4 showing the embodiment of the present invention, the position P is 1/4 W, and in the upper diagram of FIG. 4 showing the conventional example (for convenience, the same reference numerals as those of the first embodiment are given), the position P is 1. Although it is /4.6 W, the width for closing the opening 7 is shortened by the dimension “a” on both sides in the conventional example, making it difficult to sufficiently close the opening 7 and increasing the possibility of the contents leaking. become. On the contrary, in the embodiment of the present invention, the position P of the crease 4 is simply changed from 1 / 4.6W to 1 / 4W of the conventional example, and the length a is longer on both sides than the conventional example. The risk of leakage will be greatly reduced and the contents will not leak.

  Then, both corners C1 and C1 of the open end 3a of the paper tube 2 are folded up to the crease 4 as indicated by a two-dot chain line in FIG. Similarly, on the other opening end side of the paper tube 2, that is, on the bottom side, a fold parallel to the opening end is provided with a predetermined width, and both corners of the other opening end are folded up to the fold.

  Next, in the state where both corners C1 and C1 of the paper tube 2 are folded up to the crease 4 shown by a two-dot chain line in FIG. The paper 2b is developed along the crease 4, and as shown in FIG. 2, a development surface 8 having triangular folding portions 5, 6 and an opening 7 on both sides and the center thereof is formed. Further, the upper paper 2a and the lower paper 2b of the development surface 8 are folded to the opening 7 side, and folding lines 9a and 9b that can sufficiently close the opening 7 are attached to the upper paper 2a and the lower paper 2b. That is, the position P of the crease 4 that sufficiently closes the opening 7 is in the range of about 1/4 W to 1/3 W from the opening end 3a of the paper tube 2 as described above, and the position P of the crease 4 is Within the above range, the opening 7 can be sufficiently blocked by the upper paper 2a and the lower paper 2b.

  Then, a so-called peeling paste is applied to the upper paper 2a and lower paper 2b of the development surface 8 in the range indicated by the oblique lines in the lower diagram of FIG. To do. After that, as shown in FIG. 3, the lower paper 2b is folded along the folding line 9b and pasted between the triangular folding parts 5 and 6 on both sides. Further, the end piece of the upper paper 2a is folded to the opening 7 side with a predetermined width w in parallel with the folding line 9a to form a bent piece 10. Note that no peeling paste is applied to the bent piece 10 as shown in the lower diagram of FIG. In this state, the upper paper 2a is folded along the folding line 9b and pasted on the lower paper 2b (see FIG. 5). Further, the bent piece 10 has a width dimension w within a range of 10 to 20 mm, and is appropriately determined within this range. If the folded piece 10 has a width dimension w within the above range, the folded piece 10 in the non-attached state can be grasped with fingers, the upper paper 2a can be pushed open, and the opening 7 can be easily opened. Become.

  As shown in FIG. 6, the hatched portion is a pasting portion by peeling paste, and in the lower view of FIG. 4 showing the embodiment of the present invention, the position P is 1/4 W, and the upper view of FIG. 4 showing the conventional example Then, although the position P is 1 / 4.6 W, the width for closing the opening 7 is increased by a dimension on both sides in the embodiment of the present invention, and there is no possibility that the contents leak. In addition, the folded piece 10 having the predetermined width w of the upper paper 2a allows the b dimension in the lower diagram of FIG. 6 showing the embodiment of the present invention and the c dimension in the upper diagram of FIG. The same (b dimension≈c dimension). Therefore, as shown in FIGS. 7 and 8, even when the decorative paper 12 with the opening tape 11 is bonded to the upper paper 2a and the lower paper 2b, the opening tape 11 is outside the folded piece 10 of the upper paper 2a. Will be located.

  For this reason, if the decorative paper 12 is cut with the opening tape 11, the folded piece 10 portion of the upper paper 2a can be barely exposed, and the folded piece 10 portion is not bonded, so that it is within the range of 10 to 20 mm. The folded piece 10 can be easily pinched with fingers, and the opening 7 can be opened and the contents can be taken out by peeling off the bonded portion by peeling off the upper paper 2a. In FIG. 8, there is no folded piece 10 portion on the upper paper 2a, and the upper paper 2a is pasted on the lower paper 2b with the portion corresponding to the folded piece 10 extended as shown by a two-dot chain line. When attached, when the decorative paper 12 with the opening tape 11 is attached to the adhesive, the opening tape 11 is attached to the upper paper 2a. Therefore, even if the decorative paper 12 is opened with the opening tape 11, the upper paper 2a is stuck on the lower paper 2b, and the upper paper 2a cannot be pinched with fingers, and the upper paper is used with a cutter or the like. If the 2a and the lower paper 2b are not cut, the opening 7 cannot be opened, and the contents cannot be taken out.

Then, the other opening end side, that is, the bottom side of the above-described paper tube 2 is closed in substantially the same manner as the opening end 3A side, that is, the content outlet side. However, since the valve 20 for filling the contents in the bag 1 that is easy to open is attached and there is no need to open the bottom, the decorative paper 12A has no opening tape and the opening does not need to be opened. For the bonding, not the above-described peeling paste but a fixing paste for fixing is used.

The easy-open bag 1 of the present invention configured as described above is used as follows.
First, if there is a valve 20 serving as a content inlet, for example, from the other open end of the paper tube 2 in the bag 1 that is easy to open, a supply source such as a granular material is connected to the valve 20 together with the air. The granular material is fed into the bag 1 which is easy to open and filled with the granular material. When the filling is completed, the valve 20 is sealed, and if other necessary operations are completed, the bag 1 can be easily opened and filled with powder and can be put into circulation.

  And, if you want to use the granular material filled in the bag 1 that is easy to open, as shown in FIG. 7, if you grasp the opening piece 11a or the cut piece 11b of the opening tape 11 with your fingers and pull it, The decorative paper 12 can be cut, the folded piece 10 portion of the upper paper 2a can be bare, and since the folded piece 10 portion is not bonded, the folded piece 10 portion can be easily pinched with fingers. The opening 7 can be opened and the contents 21 can be taken out by peeling off the part pasted by the peeling of the upper paper 2a. That is, the bag 1 that can be easily opened can be easily opened without using other instruments, and the granular material can be taken out and used.

  Although the first embodiment of the present invention has been described above, it should be understood that the specific configuration is not limited to this, and that changes can be made as appropriate without departing from the scope of the present invention.

  The easy-to-open bag of the present invention has a simple structure, but is sufficiently satisfied with the complete prevention of powder leakage and the required strength, and when it is desired to open easily and completely. , Availability becomes extremely high.

DESCRIPTION OF SYMBOLS 1 Easy-to-open bag 2, 60 Paper-like cylinder 2a, 64 Upper paper 2b, 65 Lower paper 3A One opening edge part 3a, 61 Opening edge 4 Crease 5, 6, 62, 63 Triangle folding part 7 Opening part 8, 66 Development surface 9a, 9b, 68 Bending line 10 Bending piece 11, 52 Opening tape 11a Opening piece 11b Cut piece 12, 12A Decorative paper 20 Valve 21 Contents 50, 51 Horizontal folding line folding part 53 Outer patch 54 Strip ladle 55 Strip strip easily 67 Center opening 69 Stripping piece 70 Inner patch 71 Easy peelable adhesive 72 Opening side opening 73 First folding line 74 Second folding line 75, 76 Closed cylinder a, b, c Dimensions C1 angle P position W width of paper tube w predetermined width

Claims (3)

  Attach one fold end parallel to the opening end of the paper tube folded flat to a position sufficiently away from the opening end, fold both corners of the opening end to the fold, One side of the lower paper is developed along the crease to form a development surface having triangular folds and openings on both sides and the center thereof, and these openings are provided on the upper paper and the lower paper on the development surface. Folded sideways to sufficiently close the opening, and attached a crease parallel to the crease, folded the lower paper along the crease to the opening side, and bonded the triangular folds on both sides, and The edge of the upper paper is folded to the opening side with a predetermined width in parallel with the folding line to form a folded piece, and the upper paper in that state is folded to the opening side along the folding line. The folded piece is stuck on the lower paper in a non-sticking state, and the Closing a mouth, made by bonding the decorative paper with the tear tape to the top sheet and the bottom sheet, wherein the tear tape is easy open bag and being located outside the said bent piece.   The position at a sufficient distance from the opening end of the fold line is 1/3 W or less at maximum with respect to the width dimension W of the paper tube flatly folded from one opening end of the paper tube. Easy to open bag as described. The easily opened bag according to claim 1 or 2, wherein the width dimension w of the folded piece is in a range of 10 to 20 mm.