TW202106198A - Foldable bag and making method of the foldable bag - Google Patents

Abstract

A collapsible case (A) comprises: handle openings (D) which are formed along a pair of short sides (3) of a rectangular sheet material (1); folding ends (6) which are formed on both sides and each fold back at an equal distance (S2) from an axis of symmetry (CL) such that the mutually opposing handle openings (D) abut or approach each other along the axis of symmetry (CL), a vertical bisecting line of long sides (2) of the sheet material (1) serving as the axis of symmetry (CL); a containing section (B) which is formed by rolling up the folding ends (6) from both sides while forming a plurality of rolling lines (RL) toward the handle openings (D); and converging ends (C) which are sealed when both of the lengthwise direction sides of the rolled up containing section (B) overlap, wherein the containing section (B) can be rolled into a rectangular flat shape and collapsed by tensing the converging ends (C) in a pulling direction from a usage state.

Description

Folding bag and manufacturing method of folding bag

The present invention relates to a foldable bag that is easy to carry, and particularly relates to a foldable bag that can be folded into a rectangular flat shape as long as the two sides are pulled apart from the use state, and a method for manufacturing the foldable bag.

There have been various proposals for folding bags that are made of sheet materials and can be folded compactly in consideration of portability when not in use.

As an example of such a foldable bag, a foldable enclosure (see, for example, Patent Document 1) is known in the past, which is composed of a sheet-like material. After use, it is only necessary to stretch both ends in the direction of pulling apart. Pull to form a predetermined rectangular flat strip shape with closed ends in the longitudinal direction. The enclosure system is composed of an opening, and the widthwise central portion or one side edge of the enclosure is formed from one end portion when the enclosure is in a strip shape. It extends straight to the other end and is used for taking out and placing the object; and the enclosure body, sandwiching the opening part on one half of the one side and half of the other side, and repeating the passage with a predetermined width A bellows structure formed by a plurality of folds formed by convex and concave folds.

In addition, there is also a small and expandable single pocket pouch type belt (belt), the aforementioned pocket has a fabric and pleats that can expand asymmetrically with the contents, When the pouch is emptied, in the overlapping shape, folds are used to fold the cloth and fixed to the strap. In use, it can be tightly fixed to the user's body, and small objects can be firmly held, and it can be expanded to allow Bands for holding pockets of larger objects have been known in the past (see, for example, Patent Document 2). [Prior Technical Literature] [Patent Literature]

[Patent Document 1] International Publication No. 2017/033902 Pamphlet [Patent Document 2] JP 2010-517724 Publication

[The problem to be solved by the invention]

In the foldable enclosure described in Patent Document 1, it can be set in a form in which both ends in the longitudinal direction are closed as long as the two ends are pulled apart after use. However, in the production of expansion and contraction In the case of the capsule structure type enclosure body, it is necessary to apply hot pressing so that the folds will not disappear, and there is a problem of cost in order to fabricate the foldable enclosure body.

Furthermore, in the belt with the pouch described in Patent Document 2, although it is not necessary to apply heat to the folds when making the pouch, it is necessary to prepare a fabric that is stretchable in the direction intersecting the direction of the belt. The material for the pouch bag, similar to the above-mentioned Patent Document 1, has the problem of cost in the production of the belt with the pouch.

The present invention aims to solve the above-mentioned problems, and its purpose is to provide a folding bag and a method for making a folding bag. As long as a rectangular sheet material is rolled inward from the folding end, it can be made without using hot pressing, and as long as Tighten the two sides in the direction of pulling apart from the use state, and then roll inward into a rectangular flat shape. [Means to solve the problem]

In order to solve the above-mentioned problems, the folding bag of the present invention is a rectangular flat folding bag that is rolled inward, and the structure adopted includes: a handle opening formed along a pair of short sides of a rectangular sheet material; and a folding end, Taking the vertical bisecting line of the long side of the sheet material as the axis of symmetry, the opposite handle openings abut or approach on the axis of symmetry, and fold back to each other at equal intervals from the axis of symmetry, and Formed on both sides; the storage portion, the folding end is formed from both sides toward the handle opening, while forming a plurality of fold lines while being rolled inward; and the converging end portion, the length of the storage portion that is rolled inward Both sides in the side direction are closed in an overlapped state; the receiving portion is rolled inward and folded by pulling it tightly from the use state in the direction in which the converging end portion is pulled apart.

Furthermore, as an embodiment of the folding bag, the handle opening has a structure that is formed by bending the pair of short sides in parallel at a predetermined interval; further, the handle opening has a structure that has an edge The handle portion formed by the pair of short sides of the sheet material; and the structure adopted for the handle portion has a hollow opening portion formed leaning against the pair of short sides; in addition, the structure adopted for the storage portion has the same structure as the handle The inner pocket is formed in parallel with the opening.

Furthermore, as a method of making a folded bag, it is a method of making a rectangular flat folded bag that is rolled inward and folded by pulling both sides in the direction of pulling apart from the state of use. : The step of unfolding the rectangular sheet material composed of long and short sides; the step of forming a handle opening along a pair of short sides of the sheet material; taking the vertical two bisectors of the long side of the sheet material as The axis of symmetry is the step of turning back upwards from the axis of symmetry at equal intervals in such a way that the aforementioned handle openings in the opposite direction abut or approach on the axis of symmetry to form folded ends parallel to the aforementioned short sides on both sides; The step of forming the storage portion by forming the folded ends from both sides to the handle opening while forming a plurality of fold lines while rolling inward; and closing the both sides of the inwardly rolled storage portion in the longitudinal direction to form Steps to condense the ends.

Furthermore, as an embodiment of the method of making a folding bag, the structure adopted in the step of forming the handle opening includes the step of bending downward from the pair of short sides in parallel with the interval required to form the upright portion; and , The step of forming the handle opening includes the step of forming the handle along the pair of short sides; in addition, the step of forming the handle includes the step of forming a hollow opening against the pair of short sides. In addition, the structure adopted in the step of forming the storage portion includes the step of forming an inner bag in parallel with the opening of the handle. [Effects of Invention]

The foldable bag of the present invention adopts the above-mentioned structure, prepares a rectangular sheet-like material with the axis of symmetry as the center, and rolls inward from the folded ends formed on the left and right, eliminating the need for hot pressing. It can be produced, and when carrying, as long as the condensing end is pulled tightly in the pulling direction from the use state, the receiving part can be rolled inward and folded.

Furthermore, the method of making a foldable bag of the present invention uses the above-mentioned structure to unfold a rectangular piece of sheet material, centering on the axis of symmetry, and roll it inward from the folded ends formed on the left and right to the handle opening. Folding can be made without hot pressing, so the manufacturing steps of the folding bag can be simplified.

Next, a foldable bag according to an embodiment of the present invention will be described with reference to the drawings. In the following description, from the front view of Figure 1(a), the vertical direction is set to "up and down", the horizontal direction is set to "left and right", and the direction from the front of the paper to the depth is set to "front and rear". [Example 1]

In Figure 1, A is a folded bag in a folded state, B is a folded rectangular flat storage portion, C is a condensing end portion where both sides of the storage portion B in the longitudinal direction are overlapped and closed, and D is set in The innermost portion of the storage portion B is a handle opening for taking out and placing stored articles, and E is a binding portion that folds the storage portion B in the longitudinal direction into a compact state and binds it.

As shown in FIG. 2, the accommodating portion B and the handle opening portion D are constituted by a single rectangular sheet material 1 formed by the long side 2 and the short side 3. In this embodiment, the material of the sheet material 1 is a non-stretchable fabric (cloth) such as polyester, but as long as it is a fabric made of synthetic fibers or natural fibers such as nylon or cotton, or the fabric is coated with a synthetic resin Flexible sheet materials with the required strength and bending properties, such as laminated materials, can be selected.

The unfolded sheet material 1 is bent downward (convexly folded) on a convex fold line ML parallel to the pair of short sides 3 and separated by a predetermined interval S1 required to form the upright portion f, thereby respectively forming handle openings D .

In this embodiment, the handle opening D is formed with a V-shaped cutout 4 from the short side 3 toward the inner side, and the cutout 4 is formed (sewn) with a tape having a width smaller than the interval S1 on the short side 3 side. Handle 5 made of shaped material. However, as long as the handle opening D is bent in parallel from the short side 3 of the sheet material 1 at the required interval S1 to form the raised portion f, it is not necessary to sew materials other than the sheet material 1 as in this embodiment. As an alternative, as shown in the second embodiment described later, the handle portion may be formed by applying necessary processing to the portion of the sheet material 1 where the handle opening portion D is formed.

Next, the sheet material 1 forms the receiving portion B line-symmetrically with the axis of symmetry CL belonging to the vertical bisecting line of the long side 2 on the side, and the raised portion f of the handle opening D that has been folded convexly is symmetrical The way the axes CL face each other, the fold line FL formed by the symmetry axis CL and the convex fold line ML at equal intervals S2 is folded back (concave fold) in the arrow direction (upward), so that as shown in Figure 3, The folded ends 6 parallel to the symmetry axis CL are formed on both sides of the sheet material 1. At this time, although the handle openings D facing each other on the aforementioned axis of symmetry CL are preferably in abutment, they may only be close to each other.

Next, the sheet material 1 with the folded end 6 is formed as the arrow shown in FIG. 3, and the folded end 6 is directed from both sides toward the handle opening D, along the first roll fold line RL1, and the second roll The broken line RL2 rolls inward in sequence.

In this embodiment, the sheet material 1 formed with the folded end 6 is formed with a first roll fold line RL1 with a folding width R1 from the folded end 6 and a roll width R2 from the first roll fold line RL1. The second roll fold line RL2 whose roll width from the convex fold line ML is R3, and each roll width is set to gradually increase so as to conform to the relationship of R1<R2<R3.

Here, if the step of rolling inward the sheet material 1 with the folded end 6 formed, it will be formed in the sheet shape from the state shown in FIG. 3 to the arrow shown in FIG. 4(a). When the folded end 6 of the material 1 is rolled inward from both sides along the first roll fold line RL1 and the second roll fold line RL2 in order, it is bounded by the symmetry axis CL, and each roll width becomes R3.

Furthermore, when the sheet material 1 rolled inward into the state shown in Fig. 4(a) is bent upward from both sides along the convex fold line ML, it is shown in Fig. 4(b) with the handle opening The state where D is sandwiched on the inside forms a folded storage portion B. At this time, the folded storage portion B has a rectangular flat shape, which is composed of a bottom surface 7 formed along the axis of symmetry CL, a pair of folded upper edges 8 formed along the second fold line RL2, and an overlapping state The side ends 9 are formed on both sides in the longitudinal direction.

In this embodiment, in order to form the storage portion B, the folded end 6 formed on the sheet material 1 is as shown in the cross-sectional schematic diagram shown in FIG. 1(b), along the first roll fold line RL1, the second roll fold line RL2, and The convex fold line ML is rolled inward three times, but the step of rolling the sheet material 1 inward can also increase or decrease the number of inward rolling according to the size of the folded bag A.

Next, the storage portion B folded into the state shown in FIG. 4(b) is as shown in FIG. 5(a), and stitched feet 10 are sewn along the side end portions 9 formed on both sides in the longitudinal direction, and In order to fold and bind the storage portion B in the longitudinal direction from the vicinity of the center to the outside, one end of the ring-shaped rubber binding portion E is sewn to the one side end 9.

In this embodiment, a ring-shaped rubber product is used as the binding part E, but the binding part E is not limited to this type. For example, it may be at the end of the belt-shaped plate extending from the side end 9 A snap button is installed, and the seat part that cooperates with the snap button is installed on the surface of the receiving portion B.

As shown in Fig. 5(b), the converging end C is composed of a pair of strip-shaped materials 11, and its full length is set at more than twice the folding width R3 belonging to the width of the folded storage section B. In order to close the side end portion 9 formed in the storage portion B in an overlapping state, each strip-shaped material 11 is folded back from the fold 12 and sewn into the side end portion 9 that sandwiches the folded storage portion B.

As described above, since the foldable bag A is in a folded state, the appearance of the foldable bag A in the use state can be described with reference to FIG. 6.

The folded bag A, which is expanded to use, has a shape similar to a shoulder bag as a whole. It is composed of a bottom surface 7 with a folding width R3 (between the axis of symmetry CL and the upper folding edge 8). ) Is about twice the width; the bag body 13, with the front and rear folded ends 6 standing up from the front and back of the bottom surface 7 as the middle line; and the top edge 14, which is continuous from the bag body 13 to the upper handle 5 connected The handle opening portion D has a cut-out portion 4 formed thereon.

Next, the usage and effects of this embodiment will be described with reference to the drawings. As mentioned above, the foldable bag A of this embodiment is rolled inward by the rectangular unfolded sheet material 1 shown in FIG. 2 and is made into a folded state as shown in FIG. The steps for making package A into a usable state will be described.

First, the tying part E is removed from the storage part B bound by the rubber tying part E, and as shown in FIG. 1(a), the bottom face 7 is downwardly expanded in the left-right direction, but at this time, The accommodating portion B is a closed state with respect to the bottom surface 7 as shown in the schematic cross-sectional view shown in FIG. 1(b), and the upper side 8 is folded into a state that can be separated back and forth.

Then, the folded upper edge 8 is opened forwards and backwards, and the handle 5 sewn in the handle opening D is pulled up from the storage portion B, and the bottom surface 7 is pulled down at the same time, and as shown in FIG. 6, The foldable bag A is put into a usable state, so after putting the storage items into the handle opening D, the handle 5 can be held by hand, or it can be hung on the shoulder for use. At this time, the folded bag A is concealed by the bag body 13 such as the folded upper edge 8 at the condensed end C, so the style of the bag can be adjusted.

Next, while referring to FIG. 7, the steps of folding the folded bag A after use into a compact state will be described. From the state shown in Figure 6, fully open the handle opening D of the foldable bag A, and after taking out the stored items, hold the condensing ends C provided on both sides of the storage part B with both hands, as shown in Figure 7 (a) As shown in (a), use both hands to pull the tightening end C on both sides in the direction of pulling apart (as shown by the arrow). If the folding cannot be completed at one time, then by pulling the tightening end C Pull tightly in the direction of the arrow again to fold the storage portion B into a rectangular flat shape.

Then, as shown in FIG. 7(b), after folding the storage portion B in the longitudinal direction twice with the crease 15 and then fold it into a compact form from the side of the crease 15, and finally, tie the portion E with rubber Bundling, that is, the folding of the folded bag A is completed.

As mentioned above, the folding bag A of this embodiment prepares one piece of rectangular sheet material 1 and rolls it inward from the folded ends 6 formed on the left and right in order by taking the symmetry axis CL as the center. Conveniently constitute the storage part B, without the need to use hot press folding operation. [Example 2]

Next, a description will be given of a second embodiment obtained by changing the configuration of the handle portion 5 of the first embodiment. Hereinafter, the same components as in the first embodiment are denoted by the same symbols, and only different components are denoted by different symbols, and the description will be centered on the differences.

In FIG. 8, the symbol 21 is a rectangular sheet-like material formed by the long side 22 and the short side 23 and constitutes the storage portion B and the handle opening portion D of the folding bag A shown in FIG. 1. Comparing the sheet material 21 with the sheet material 1 of the first embodiment, the size of the short side 23 is the same as that of the sheet material 1, but the size of the long side 22 is larger than that of the long side 2 of the sheet material 1. They are set at the interval S3 of the upper and lower parts.

The unfolded sheet material 21 has a semi-elliptical hollow opening 24 leaning against a pair of short sides 23, respectively. The sheet material 21 is concavely folded through the concave folding line VL parallel to the short side 23 and separated by a predetermined interval S3, so that the short side 23 is aligned with the overlap line OL of the straight portion contacting the hollow opening 24, and stitched into two layers In an overlapping state, the handle 25 is formed. In this embodiment, the hollow opening 24 is reinforced by sewing a reinforcing tape 26 around it.

Next, the usage and effects of this embodiment will be described with reference to the drawings. In this embodiment, similar to the first embodiment, by unfolding the rectangular sheet material 21 shown in FIG. 8 and folding it inwardly, the folded bag A shown in FIG. 1 is made in a completely folded state. However, since the handle 25 formed in the handle opening D is different from the handle 5 of the first embodiment, it will be described.

In this embodiment, as mentioned above, the rectangular expanded sheet material 21 shown in FIG. 8 is leaned against a pair of short sides 23 to be hollowed out to form hollow openings 24, and the short sides 23 are separated from the short sides 23 by the recesses of the interval S3. The folding line VL is concavely folded, and two cloth pieces are overlapped and sewn together to form the handle 25.

The sheet material 21 is formed after the handle portion 25 is formed, and is parallel to the pair of short sides 23, and is bent downward through the convex fold line ML separated by a predetermined interval S1, and is the same as the handle opening D shown in FIG. 3 , Respectively form the upright part f. Then, the folded bag A was produced in the same procedure as in the first embodiment shown in FIGS. 3 to 5.

As mentioned above, in this embodiment, as long as one rectangular sheet material 21 is prepared, the hollow opening 24 is formed on each short side 23 side of the sheet material 21 and stitched into two overlapping pieces, which can be used as a handle The portion of the opening D forms the handle 25. [Example 3]

Next, a description will be given of a third embodiment obtained by changing the configuration of the storage portion B and the binding portion E of the first embodiment. Hereinafter, the same components as in the first embodiment are denoted by the same symbols, and only different components are denoted by different symbols, and the description will be centered on the differences.

In Figure 10 (a), Aa is a folded bag in a folded state, Ba is a folded rectangular flat storage portion, C is a condensing end portion where the two sides of the storage portion Ba in the longitudinal direction are overlapped and closed, D In order to be provided on the innermost side of the storage portion Ba, the handle opening (refer to FIG. 10(b)) for taking out and placing the storage items 29 (refer to FIG. 10(b)), Ea is the storage portion Ba that is folded in the longitudinal direction into a compact state and tied Binding Department. In addition, in this embodiment, the tying part Ea is different from the first embodiment and is provided on the side of the receiving part Ba of the converging end C, but the tying part Ea can only be as shown in FIG. 7(b) It does not matter if the accommodating part Ba is tied in a state of being folded in the longitudinal direction like the accommodating part B, and it does not matter if it is provided in any position.

In FIG. 9, the symbol 1 is a rectangular sheet material composed of the long side 2 and the short side 3, and is used to constitute the storage portion Ba and the handle opening portion D of the folding bag Aa shown in FIG. In this embodiment, the handle opening D is formed with V-shaped cutouts 4 from the short side 3 to the inner side, and the cutout 4 is sewn on the side of the short side 3 with a strip-shaped material having a smaller width than the interval S1. Handle part 5.

The unfolded sheet material 1 is sutured to form an inner bag P by sewing the upper end of the additional sheet material 27 in contact with the front end of the cutout part 4. In this embodiment, in order to form the inner bag P, an additional sheet material 27 with the same transverse dimension as the short side 3 and a longitudinal dimension greater than the depth d of the seam inner bag P is used, but the additional sheet material forming the inner bag P The size of 27 can be appropriately selected according to the desired width w and depth d of the inner bag P.

Next, with reference to the drawings, the usage and effects of this embodiment will be described. In this embodiment, as in the first embodiment, the foldable bag Aa shown in Fig. 10(a) is produced by rolling the rectangular unfolded sheet material 1 shown in Fig. 9 inward and in a folded state. However, the point that the inner bag P is formed inside the accommodating portion Ba is different from the first embodiment, so it will be described.

In this embodiment, as shown in FIG. 9, the additional sheet material 27 is arranged at a position where the upper end contacts the front end of the cut-out portion 4 formed in the rectangular expanded sheet material 1, and the additional sheet material 27 is The stitching foot 28 is sewn to the sheet material 1, and an inner bag P is formed inside the storage portion B. As shown in FIG. At this time, the width w of the inner bag P can be appropriately set by changing the sewing position of the stitch leg 28.

After forming the inner bag P, the sheet material 1 is bent downward through a convex fold line ML with a predetermined interval S1 in parallel with the pair of short sides 3, and is similar to the handle opening D shown in FIG. 3 A raised portion f is formed. After that, the folded bag Aa was produced in the same procedure as in the first embodiment shown in FIGS. 3 to 5.

The foldable bag Aa is made in a folded state, so if one side refers to Figure 10(b), while describing the appearance of the foldable bag Aa in the use state, the foldable bag Aa expanded into the use state is to be opened from the handle opening D Storage items 29 such as lunch boxes are stored inside the storage portion Ba, and are formed in an inner pocket P formed inside the storage portion Ba, and can be placed in a hammock (hammock) state and stored separately from the storage items 29 such as bottles 30 position.

As described above, in this embodiment, the additional sheet material 27 is sewn into one rectangular sheet material 1 constituting the storage portion Ba and the handle opening portion D of the folding bag Aa, and the inner side of the storage portion Ba is formed. The bag P is stored in the storage portion Ba in a state in which storage items 29 such as lunch boxes and the bottle 30 are separated from each other. [Example 4]

Next, a description will be given of a fourth embodiment obtained by changing the configuration of the handle opening D of the first embodiment. Hereinafter, the same components as in the first embodiment are denoted by the same symbols, and only different components are denoted by different symbols, and the description will be centered on the differences.

In FIG. 11, Ab is the folded bag in the folded state, Bb is the folded rectangular flat-shaped storage portion, C is the converging end portion that overlaps the two sides of the aforementioned storage portion Bb in the longitudinal direction, and Da is A handle opening provided on the innermost side of the storage portion Bb for storing articles to enter and exit, Ea is a binding portion that is tied in a compactly folded state toward the longitudinal direction of the storage portion Bb, and 35 is formed in the handle opening Da的Handle part.

As shown in FIG. 12, the accommodating portion Bb and the handle opening Da are composed of a single rectangular sheet material 31 formed of long sides 32 and short sides 33, but compared with the sheet material 1 of the first embodiment, Although the size of the short side 33 of the sheet material 31 is the same as that of the sheet material 1, the size of the long side 32 is larger than that of the long side 2 of the sheet material 1 shown in FIG. Approximate size of width R0.

The unfolded sheet material 31 is symmetrically formed with a handle opening Da formed along a pair of short sides 33 in order to form a receiving portion Bb line-symmetrically sandwiching the axis of symmetry CL belonging to the vertical bisecting line of the long side 32. The axis CL faces each other in such a way that the fold line FL at equal intervals S4 formed by the symmetry axis CL and the short side 33 is folded back (concave fold) in the arrow direction (upward), and as shown in FIG. 13, the sum The folded ends 36 whose symmetry axis CL is parallel are formed on both sides of the sheet material 31. At this time, it is preferable that the handle openings Da facing each other on the aforementioned axis of symmetry CL are as close as possible to each other.

Next, the handle openings Da facing each other on the aforementioned axis of symmetry CL are sewn with a handle 35 made of a band-shaped material to connect the center portions of the short sides 33 to each other. Then, the sheet material 31 with the folded end 36 is formed with the folded end 36 from both sides toward the handle opening Da, as shown by the arrow shown in FIG. 13, along the first roll fold line RL1, and the second roll fold line RL2, volume 3 fold line RL3 rolls inward in sequence.

In this embodiment, the sheet material 31 that has formed the folded end 36 is formed with: a first roll fold line RL1 with a folding width R0 from the folded end 36; a first roll fold line RL1 with a roll width R1 from the first roll fold line RL1 The second fold line RL2; and the third fold line RL3 whose fold width from the second fold line RL2 is R2, and the fold width from the short side 33 is R3, and each fold width is set to gradually increase , To meet the relationship of R0<R1<R2<R3.

As shown by the arrow, the folded end 36 formed on the sheet material 31 from the state shown in FIG. 13 is sequentially inward from both sides along the first roll fold line RL1, the second roll fold line RL2, and the third roll fold line RL3 When rolling, it is bounded by the axis of symmetry CL and rolled inward so that the width of each fold becomes R3. The sheet material 31 rolled inward by the above-mentioned steps constitutes a folded storage portion Bb in a state where the handle opening Da is hidden in the inner bottom, as shown in the schematic cross-sectional view shown in FIG. 11(b). At this time, as shown in FIG. 11(a), the folded storage portion Bb has a bottom surface 37 formed along the axis of symmetry CL, a pair of folded upper edges 38 formed along the third fold line RL3, and overlapping The state is formed in a rectangular flat shape formed by the converging ends C on both sides in the longitudinal direction.

In this embodiment, in order to form the storage portion Bb, the folded end 36 formed on the sheet material 31 is along the first roll fold line RL1, the second roll fold line RL2, and the third roll fold line as shown in FIG. 11(b) The RL3 is rolled inward three times, but the step of rolling the sheet material 31 inward can also increase or decrease the number of inward rolling according to the size of the folded bag Ab.

Next, with reference to the drawings, the usage and effects of this embodiment will be described. The folded bag Ab of this embodiment is the same as the first embodiment. The rectangular expanded sheet material 31 shown in FIG. 12 is formed with the return line FLa of equal intervals S4 from the symmetry axis CL and the short side 33. It is folded back and rolled inward, and is produced in a folded state as shown in FIG. 11. However, since the handle opening Da and the handle 35 are different from the handle opening D and the handle 5 of the first embodiment, they are designed for folding The steps of forming the folded bag Ab in the state into the usable state will be described.

First, as in the first embodiment, the binding portion Ea is removed from the storage portion Bb bound by the binding portion Ea, and as shown in FIG. 11(a), it is expanded in the left-right direction with the bottom surface 37 down. open. At this time, the accommodating portion Bb is a cross-sectional schematic diagram shown in FIG. 11(b), and the bottom surface 37 is closed, and the folded upper side 38 is formed into a state that can be separated back and forth.

Then, the folded upper edge 38 is opened back and forth, the handle 35 sewn in the handle opening Da of the storage portion Bb is pulled up, and the bottom surface 37 is pulled down, and the folded bag Ab becomes a usable state, so from the handle opening After Da puts in the storage items, it can be used by holding the handle 35 by hand, or hanging it on the shoulder.

Next, the folding steps of the folded bag Ab after use will be described, which is to fully open the handle opening Da of the folded bag Ab from the use state, and after taking out the stored items, grasp the bundled ends on both sides of the storage portion Bb with both hands. C, and use both hands to tighten the converging ends C on both sides in the direction of pulling apart, the receiving portion Bb can be correctly and smoothly rolled inward, and as shown in Figure 11 (a), the receiving portion Bb Fold into a rectangular flat shape.

As described above, the foldable bag Ab of this embodiment prepares a rectangular sheet material 31, and the handle openings Da formed along a pair of short sides 33 oppose each other with the symmetry axis CL as the center. , The folded ends 36 formed on the left and right are rolled inward in order, instead of forming the upright part f in the handle opening Da. After use, the bundled ends provided on both sides of the accommodating part Bb are used with both hands. C is tightened in the direction of separation. Compared with the first embodiment where the upright portion f is formed, the storage portion Bb is easier to roll inward, and the folding can be neatly completed in one action.

In addition, in the folding bag Ab of this embodiment, the handle portion 35 is formed by connecting the facing handle openings Da to each other on the axis of symmetry CL. Therefore, the handle portion 35 is removed from the folded state during use. By pulling up, the handle opening Da folded at the inner bottom of the storage portion Bb can be easily expanded. [Possibility of Industrial Utilization]

The folding bag of the present invention can be used to conceal the constricted ends by the body of the bag in appearance, so the style of the bag can be adjusted, and as long as the two sides are in the direction of separation from the state of use It can be folded and rolled inward in a rectangular flat shape, which can be easily folded when carrying it. Especially when shopping, it can be used as an eco bag for storing purchased goods, etc., which is very suitable.

A, Aa, Ab: Folding bag B, Ba, Bb: storage section C: the end of the bundle D, Da: handle opening E, Ea: Binding Department CL: Symmetry axis (center line) FL, FLA: return line ML: Convex polyline OL: Overlapping line P: inner bag RL1, RL2, RL3: roll line R0, R1, R2, R3: roll width S1, S2, S3, S4: interval VL: concave polyline d: depth f: erected part w: width 1, 21, 31: sheet material 2, 22, 32: long side 3, 23, 33: short side 4: Resection 5, 25, 35: handle 6, 36: Folding end 7,37: bottom surface 8,38: Fold the top 9: Side end 10, 28: Suture feet 11: Ribbon material 12, 15: Crease 13: Bag body 14: Top edge 24: Hollow opening 26: Reinforcement belt 27: Additional sheet material 29: Storage items 30: bottle

Fig. 1 is a folded state diagram of a folding bag according to the first embodiment of the embodiment of the present invention, in which (a) is a front view, and (b) is a schematic cross-sectional view of (a) in the X1-X1 arrow direction. Fig. 2 is a plan view of the unfolded state of the sheet-like material used to make the folding bag of the first embodiment of the embodiment. Fig. 3 is a perspective view of the folding step of the sheet material of Fig. 2. Fig. 4 is a view of the inwardly rolled state of the sheet material folded in the steps of Fig. 3, in which (a) is a perspective view of the inwardly rolled state twice, and (b) is the inwardly rolled state of three times Stereograph. Fig. 5 is a perspective view of the completion steps of the folded bag according to the first embodiment of the embodiment, in which (a) is a perspective view of a state where the side ends are sewn, and (b) is a state where a belt-shaped material is sewn on the side ends Perspective view. Fig. 6 is a perspective view of the folded bag of the first embodiment of the embodiment in an expanded state of use. Fig. 7 is an explanatory diagram of the steps when folding the folding bag according to the first embodiment of the embodiment, in which (a) is a diagram of the state where the condensed ends of both ends are tightened in the pulling direction, and (b) is the folding A diagram of the state where the two-folded storage portion is rolled in the longitudinal direction. Fig. 8 is a plan view of the unfolded state of the sheet-like material used to make the folding bag according to the second embodiment of the embodiment. Fig. 9 is a plan view of the unfolded state of the sheet-like material used to make the folding bag of the third embodiment of the embodiment. Fig. 10 is a diagram of a folding bag according to a third embodiment of the embodiment, in which (a) is a front view in a folded state, and (b) is a perspective view in an expanded use state. 11 is a view of the folded state of the folding bag according to the fourth embodiment of the embodiment, in which (a) is a front view, and (b) is a schematic cross-sectional view of (a) in the X2-X2 arrow direction. Fig. 12 is a plan view of the unfolded state of the sheet-like material for making the folding bag according to the fourth embodiment of the embodiment. Fig. 13 is a perspective view of the folding step of the sheet material of Fig. 12;

A: Folding bag

B: Storage department

C: the end of the bundle

D: Handle opening

E: Binding Department

CL: Symmetry axis (center line)

ML: Convex polyline

RL1, RL2: roll and fold line

R3: fold width

f: erected part

6: Folding end

7: Bottom

8: Fold the top

Claims (10)

A folding bag, which is a rectangular flat folded bag rolled inward, and has: The handle opening is formed along a pair of short sides of the rectangular sheet material; The folded end uses the vertical bisecting line of the long side of the sheet material as the axis of symmetry, and the opposite handle openings abut or approach on the axis of symmetry, and return to each other at equal intervals from the axis of symmetry. Folded and formed on both sides; The accommodating part is formed by turning the folded end toward the handle opening from both sides, while forming a plurality of fold lines while being rolled inward; and The converging end part is closed by overlapping both sides in the longitudinal direction of the inwardly rolled storage part, The receiving portion is rolled inward and folded by pulling it tightly in the direction in which the constricted end portion is pulled apart from the use state. The foldable bag according to claim 1, wherein the handle opening has a raised portion formed by bending the pair of short sides in parallel at a predetermined interval. The folding bag of claim 1 or 2, wherein the handle opening has a handle formed along the pair of short sides. Such as the folding bag of claim 3, wherein the handle portion has a hollow opening formed by leaning against the pair of short sides. The foldable bag according to any one of claims 1 to 4, wherein the storage portion has an inner bag formed in parallel with the handle opening. A method for making a folded bag is a method of making a rectangular flat folded bag that is rolled and folded inward by pulling the two sides in the direction of pulling apart from the in-use state. The step of unfolding a rectangular sheet material composed of long sides and short sides; The step of forming a handle opening along a pair of short sides of the aforementioned sheet material; Taking the vertical bisecting line of the long side of the sheet material as the axis of symmetry, and turning back upward from the axis of symmetry at equal intervals so that the handle openings facing each other abut or approach on the axis of symmetry, And the step of forming folded ends parallel to the aforementioned short side on both sides; The step of rolling the folded end inward from both sides to the handle opening while forming a plurality of fold lines to form a receiving portion; and The step of closing both sides in the longitudinal direction of the aforementioned inwardly rolled accommodating portion to form a converging end. The method of manufacturing a folded bag according to claim 6, wherein the step of forming the handle opening includes a step of bending the pair of short sides in parallel with the interval required to form the upright portion downward. The method for producing a folded bag according to claim 6 or 7, wherein the step of forming the handle opening includes the step of forming the handle along the pair of short sides. For example, the method for manufacturing a folded bag of claim 8, wherein the step of forming the handle includes the step of forming a hollow opening by leaning against the pair of short sides. The method for manufacturing a folded bag according to any one of claims 6 to 9, wherein the step of forming the storage portion includes a step of forming an inner bag in parallel with the handle opening.

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