JP2011057278A - Container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a container that can be used in a plurality of forms by folding foldable portions while the foldable portions can also function as a lid body and a bottom portion. <P>SOLUTION: When foldable portions 32 located at the end parts of a cylinder portion 3 are folded, the foldable portions 32 function as a lid portion 34 or a bottom portion 35 to block the end parts of the cylinder portion 3. Further, the foldable portions 32 include insertion spaces 37 for holding at least one of ear portions 36, which are formed at four corners, as the ear portion remains inserted when the foldable portions located at the end parts of the cylinder portion 3 are folded. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a container formed using a sheet material.

  Various types of containers such as a packaging container, a packaging container, a storage container, and a transport container are known as a container formed using a sheet material. Some containers of this type are configured to be foldable so that they can be folded compactly as required. For example, in Patent Document 1, when a plastic sheet is formed into a container by vacuum molding, a rib that can be folded inward when the molded container is pressed up and down is integrally formed on the side wall, and the side wall is formed. A container that can be folded flat has been proposed.

JP-A-9-175541

However, the conventional foldable container is intended for volume reduction in a non-use state, and has two types, a first form (use state) having a predetermined capacity and a folded second form (non-use state). In the state which can only be changed into a form and can be used as a container, the shape of the container is fixed, and use in a plurality of forms is impossible.
In addition, since the conventional foldable container needs to be separately formed with a lid portion and a bottom portion, there is a problem that the shape of the container becomes complicated and the manufacturing cost increases.

  The present invention has been made in view of the above circumstances, and by folding the foldable portion, it can be used in a plurality of forms, and the foldable portion can also function as a lid or a bottom portion. To provide a simple container.

  In order to achieve the above object, the container of the present invention is a container that is formed using a sheet material and includes a cylindrical section having a square cross section, and is formed of four corner sections that can be bent at the corner of the cylindrical section. It is formed in the surface part of the said cylinder part so that it may orthogonally cross with the bending line and the said corner | angular part bending line, and it arranges in the circumferential direction of the said cylinder part between the adjacent same type bending line or the edge line of the said cylinder part. The four square parts arranged in the circumferential direction of the cylindrical part, comprising a foldable surface folding line that forms four square parts, and a foldable diagonal folding line that is formed along the diagonal lines of the square part. The corner folding line and the surface folding line forming the square part are mountain-folded, and the diagonal folding line in the square part is valley-folded, whereby the cylinder The foldable portion that is foldable to the hollow portion side of the tube portion and the foldable portion located at the end portion of the cylindrical portion functions as a lid portion or a bottom portion that closes the end portion of the cylindrical portion when folded. Furthermore, the foldable portion located at the end of the cylindrical portion is an insertion that can hold at least one of the ear portions formed at the four corners when the foldable portion is folded. It is configured to have a mouth.

  As described above, according to the present invention, by folding the foldable portion, not only can it be used in a plurality of forms, but it can also function as a lid portion or a bottom portion that closes the end portion of the cylindrical portion, In the foldable part that functions as a lid part or a bottom part, by holding the ear part in an inserted state, the ear part does not get in the way of carrying, and an unexpected opening of the lid part or the bottom part can be suppressed.

It is a perspective view of the container concerning a first embodiment of the present invention. It is an expanded view of the container which concerns on 1st embodiment of this invention. It is explanatory drawing which shows the example of a bubble sheet. It is a perspective view which shows the state by which the foldable part located in the intermediate part of the container which concerns on 1st embodiment of this invention was folded. It is explanatory drawing which looked at the partition part formed in the cylinder part from the arrow A direction of FIG. It is a perspective view which shows the state by which the foldable part located in the edge part of the container which concerns on 1st embodiment of this invention was folded. It is explanatory drawing which shows the state which folded the foldable part located in the edge part of the container which concerns on 1st embodiment of this invention, and inserted the ear | edge part in the insertion port. It is explanatory drawing which shows the example of sealing with an adhesive tape. It is a perspective view of the container which concerns on 2nd embodiment of this invention. It is an expanded view of the container which concerns on 2nd embodiment of this invention. It is explanatory drawing which shows the state which folded the foldable part located in the edge part of the container which concerns on 2nd embodiment of this invention, and inserted the ear | edge part in the insertion port. It is explanatory drawing which shows the procedure which folds the foldable part located in the edge part of the container which concerns on 2nd embodiment of this invention, and inserts the ear | edge part in an insertion port.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[First embodiment]
First, the container which concerns on 1st embodiment of this invention is demonstrated with reference to FIGS.

FIG. 1 is a perspective view of a container according to the first embodiment of the present invention, FIG. 2 is a development view of the container according to the first embodiment of the present invention, and the container 1A is formed using a sheet material 2. The cylinder section 3 having a square cross section is provided. Such a container 1A, for example, processes a predetermined portion of the flat sheet material 2 so that it can be bent, and cuts out the predetermined portion by a punching process or the like so as to have a shape as shown in FIG. It can be formed by bonding by thermal fusion or the like.
In addition, although the container 1A of this embodiment is the cylinder part 3 with the square cross section as a whole, the container which has the cylinder part 3 in a part may be sufficient.

As shown in FIG. 3A, the sheet material 2 forming the container 1 </ b> A includes a cap film 22 having a large number of protrusions 21 that bulge in a hollow shape, and a back film laminated on the opening side of the protrusions 21. It is preferable to use a three-layer bubble sheet made up of a liner film 24 laminated on the top side of the protrusion 21. Such a sheet material 2 can provide cushioning properties and heat insulation effects required for packing containers and the like.
FIG. 3 is an explanatory view showing an example of a bubble sheet, FIG. 3 (a) is a partially cutaway perspective view showing an example of a three-layer bubble sheet, and FIG. 3 (b) is a two-layer bubble sheet. It is a partially cutaway perspective view showing an example.

  Further, the sheet material 2 made of the three-layer bubble sheet can easily ensure the rigidity required for the container 1A. The rigidity of the container 1A is necessary so that the shape of the container does not easily collapse when stored and transported in a state where an article is accommodated. According to the above three-layer bubble sheet, FIG. Compared to the double-layered cell sheet shown in Fig. 2, not only can the required rigidity be easily secured, but both the front and back surfaces can be made substantially flat.

  In addition, the sheet material 2 made of a three-layer bubble sheet is easy to adjust the rigidity as compared with a single-layer sheet material. That is, since the rigidity of the three-layered bubble sheet is determined by the material composition and thickness of each film 22-24, arbitrary rigidity can be obtained by individually setting the material composition and thickness of each film 22-24. . For example, the cap film 22, the back film 23, and the liner film 24 constituting the sheet material 2 of the present embodiment are all molded using a synthetic resin of polyethylene: 10 to 30% by weight and polypropylene: 90 to 70% by weight. However, it is possible to arbitrarily adjust the rigidity of the sheet material 2 by individually changing the type and composition of the synthetic resin used for forming the films 22 to 24.

  Moreover, the sheet | seat material 2 which consists of a three-layer bubble sheet can ensure favorable bendability only by forming the seal line L. FIG. The seal line L can be easily formed by using a heat seal device such as a band sealer or an impulse sealer. For example, the back layer 23 and the liner film 24 are formed by crushing a three-layer bubble sheet in a line while applying heat. The seal line L is formed by heat sealing. And in the site | part in which such a seal line L was formed, the sheet | seat material 2 along the seal line L can be bend | folded.

  The cylindrical portion 3 of the container 1A has four corner seal lines L1 that are foldable corner bending lines formed at the four corners thereof, and the cylindrical portion 3 so as to be orthogonal to the corner seal line L1. It becomes a foldable surface part fold line that forms four square parts 31 arranged in the circumferential direction of the cylinder part 3 between the adjacent seal line L2 of the same type or the edge line L4 of the cylinder part 3 formed on the surface part. The surface part seal line L2 and the diagonal seal line L3 used as the foldable diagonal bending line formed along the diagonal line of the square part 31 are provided. The diagonal seal line L3 only needs to be formed along one of the two diagonal lines of the square part 31, but is formed on each of the four square parts 31 arranged in the circumferential direction of the cylindrical part 3. As shown in FIG. 2, the four diagonal seal lines L3 must face in the same direction in the deployed state and be parallel to each other.

When the seal lines L1 to L3 are formed as described above, the four square portions 31 arranged in the circumferential direction of the cylindrical portion 3 are, as shown in FIG. 4, the corner seal lines L1 and the surface portions forming the square portion 31. By making the seal line L2 into a mountain fold and making the diagonal seal line L3 in the square portion 31 into a valley fold, the foldable portion 32 that can be folded toward the hollow portion side of the cylindrical portion 3 can be configured. And the capacity | capacitance of the cylinder part 3 is changed by folding the foldable part 32. FIG. According to such a container 1A, the foldable portion 32 can be used in a plurality of forms by folding.
Here, FIG. 4 is a perspective view showing a state in which the foldable portion located at the intermediate portion of the container according to the first embodiment of the present invention is folded.

The foldable part 32 of this embodiment can be easily folded by holding both ends of the cylindrical part 3 with both hands and twisting it 90 degrees in a predetermined direction. When the foldable portion 32 is folded, each square portion 31 is folded in half with the diagonal seal line L3 as a valley fold, resulting in a right-angled isosceles triangle. Then, the four right isosceles triangles can be sequentially overlapped with the adjacent right isosceles triangle to form a partition 33 as shown in FIG.
Here, FIG. 5 is an explanatory view of the partition portion 33 formed in the cylindrical portion 3 from the direction of arrow A in FIG.

Thus, when the foldable part 32 located in the intermediate part of the cylinder part 3 is folded, the partition part 33 which partitions the hollow part of the cylinder part 3 into a plurality of spaces can be formed. Therefore, according to the container 1A of the present embodiment, by folding the foldable part 32 located in the middle part of the cylindrical part 3, not only can the capacity be changed, but the hollow part of the cylindrical part 3 is partitioned into a plurality of spaces. A plurality of types of articles can be accommodated separately.
Further, in this embodiment, each of the corner bending line, the surface bending line, and the diagonal bending line is formed as a foldable seal line L formed by heat-sealing the part, but these folding lines are A part or all of them can be formed by perforations or the like. In this case, if at least one of the surface bending lines is formed by a perforation, the length of the cylindrical portion 3 can be adjusted by cutting the perforation.

On the other hand, when the foldable portion 32 located at the end of the tube portion 3 is folded as shown in FIG. 6, it can function as a lid portion 34 or a bottom portion 35 that closes the end portion of the tube portion 3. According to such a container 1A, since it is not necessary to separately form another shape of the lid and the bottom, the shape of the container can be simplified and the cost can be reduced.
Here, FIG. 6 is a perspective view showing a state in which the foldable portion located at the end of the container according to the first embodiment of the present invention is folded.

  By the way, when the foldable portion 32 located at the end portion of the tube portion 3 is folded, the ear portions 36 slightly raised from the tube portion main body are formed at the four corners. These ears 36 may interfere with carrying, and in a state where these ears 36 are not held at all, the lid part 34 and the bottom part 35 are unexpectedly opened, and the contents of the cylindrical part 3 are There is a risk of spilling.

Therefore, in the container 1A according to the present embodiment, when the foldable portion 32 is folded on the foldable portion 32 located at the end of the cylindrical portion 3, at least one of the ear portions 36 formed at the four corners thereof. An insertion port 37 is formed which can be held in the inserted state. According to such a container 1A, in the foldable part 32 functioning as the lid part 34 or the bottom part 35, the ear part 36 is inserted into the insertion port 37 and held, so that the ear part 36 becomes an obstacle when carrying it. In addition, the unexpected opening of the lid 34 and the bottom 35 can be suppressed.
Here, FIG. 7 is an explanatory view showing a state in which the foldable portion located at the end of the cylindrical portion is folded and the ear portion is inserted into the insertion port, and functions as the lid portion 34 or the bottom portion 35. The four ears 36 of the foldable part 32 are inserted and held in the corresponding insertion ports 37.

  In the square part 31 of the foldable part 32 located at the end part of the cylinder part 3, the insertion port 37 is parallel to the diagonal seal line L3 at the corner part formed by the corner part seal line L1 and the face part seal line L2. It can be a cut line formed. If it does in this way, since the insertion port 37 can be formed only by processing a cutting line in the sheet | seat material 2, implementation of this invention becomes possible, without raising manufacturing cost.

  In addition, the insertion port 37 has a diagonal seal line L3 and a corner seal line L1 and a corner seal line L2 in the square portion 31 of the foldable portion 32 located at the end of the cylindrical portion 3. Perforation lines formed in parallel may be used. In this case, the ear portion 36 can be inserted by manually opening the perforation line as necessary.

  The container 1 </ b> A of the present embodiment has insertion ports 37 in the four square portions 31 of the foldable portion 32 located at the end of the cylindrical portion 3, and has four ear portions 36 of the folded foldable portion 32. Are inserted and held in separate insertion ports 37, respectively. According to such a container 1A, by holding all the four ears 36 in the inserted state, it is possible to reliably prevent the ears 36 from being obstructed during carrying, and to prevent the lid 34 and the bottom 35 from being opened. The effect can also be enhanced.

Note that when shipping the article using the container 1A, the lid 34 and the bottom 35 can be sealed by appropriate means such as an adhesive, an adhesive tape, a hook-and-loop fastener, and a hook as necessary.
For example, as shown in FIG. 8, the wide adhesive tape 4 can be applied along the diagonal lines of the lid 34 and the bottom 35 to seal the lid 34 and the bottom 35. According to such sealing, since the insertion port 37 and the central opening 38 can be closed by the adhesive tape 4, the sealing performance of the container 1A can be improved. If the gap 39 (see FIG. 6) generated between the lid portion 34 or the bottom portion 35 and the cylinder body is anxious, the adhesive tape 4 can be attached along the periphery of the lid portion 34 or the bottom portion 35 to remove the gap. 39 can be blocked.
Here, FIG. 8 is explanatory drawing which shows the example of sealing with an adhesive tape.

A plurality of foldable portions 32 can be formed in the length direction of the cylindrical portion 3. According to such a container 1A, when the number of foldable parts 32 is n, the container 1A can be used in ²ⁿ forms. For example, in the present embodiment, five foldable portions 32 are formed in the length direction of the cylindrical portion 3, and therefore, by folding each foldable portion 32 selectively, 2 ⁵ = 32 types are used. can do.

  When a plurality of the foldable parts 32 are formed in the length direction of the cylinder part 3, the foldable parts 32 can be continuously formed without any interval in the length direction of the cylinder part 3. For example, in the container 1 </ b> A of the present embodiment, the five foldable portions 32 are continuously formed without leaving an interval in the length direction of the cylindrical portion 3. According to such a container 1A, the maximum foldable part 32 is formed in the cylindrical part 3 having a limited length, and the container 1A can be used in various forms.

  Further, the plurality of foldable portions 32 can be formed in the entire region of the cylindrical portion 3. According to such a container 1A, not only the processing of the seal line L with respect to the sheet material 2 is facilitated, but all the foldable portions 32 can be folded so that the entire cylindrical portion can be folded into a square shape in a compact manner. become.

  According to the first embodiment configured as described above, the container 1 </ b> A is formed using the sheet material 2 and includes the cylindrical portion 3 having a square cross section, and can be bent at the corner of the cylindrical portion 3. The four corner seal lines L1 are formed on the surface portion of the cylinder portion 3 so as to be orthogonal to the corner seal line L1, and between the adjacent seal line L2 of the same type or the edge line L4 of the cylinder portion 3. A foldable face seal line L2 that forms four square portions 31 aligned in the circumferential direction of the cylindrical portion 3, and a foldable diagonal seal line L3 formed along a diagonal line of the square portion 31, The four square portions 31 arranged in the circumferential direction of the cylindrical portion 3 have the corner seal line L1 and the surface seal line L2 forming the square portion 31 as mountain folds, and the diagonal seals in the square portion 31 Line L3 is valley folded Thus, the foldable part 32 that can be folded toward the hollow part side of the cylinder part is configured, and the foldable part 32 is folded so that the capacity of the cylinder part 3 is changed. By folding, it can be used in multiple forms.

  In addition, the foldable portion 32 located at the end of the cylindrical portion 3 functions as a lid portion 34 or a bottom portion 35 that closes the end portion of the cylindrical portion 3 when folded, so that a differently shaped lid portion or bottom portion is separately formed. Therefore, the container shape can be simplified and the cost can be reduced.

  Further, the foldable portion 32 located at the end of the cylindrical portion 3 can hold at least one of the ear portions 36 formed at the four corners when the foldable portion 32 is folded. Since the insertion port 37 is provided, the ear portion 36 does not get in the way when being carried, and unexpected opening of the lid portion 34 and the bottom portion 35 can be suppressed.

  In addition, the insertion port 37 has a diagonal seal line L3 and a corner seal line L1 and a corner seal line L2 in the square portion 31 of the foldable portion 32 located at the end of the cylindrical portion 3. Since it consists of incision lines and perforation lines formed in parallel, the insertion port 37 can be formed simply by processing the incision lines and perforation lines in the sheet material 2, resulting in an increase in manufacturing cost. The present invention can be implemented without any problem.

  Further, the insertion port 37 is formed in each of the four square portions 31 of the foldable portion 32 located at the end of the cylindrical portion 3, and the four ear portions 36 of the folded foldable portion 32 are respectively inserted. All the four ears 36 can be held in an inserted state, and as a result, the ears 36 can be reliably prevented from being obstructed during carrying, and the effect of suppressing the opening of the lid 34 and the bottom 35 can be enhanced. Can do.

  Further, the sheet material 2 includes a cap film 22 formed with a large number of protrusions 21 bulging in a hollow shape, a back film 23 laminated on the opening side of the protrusions 21, and a liner laminated on the top side of the protrusions 21. Since it is a three-layer bubble sheet composed of the film 24, it is possible to easily adjust the rigidity and ensure the bendability, and to obtain the cushioning properties and the heat insulating effect required for the packaging container.

[Second Embodiment]
Next, the container which concerns on 2nd embodiment of this invention is demonstrated with reference to FIGS. However, about the part which is common with 1st embodiment, description of 1st embodiment is used by using the same code | symbol as 1st embodiment.

FIG. 9 is a perspective view of a container according to the second embodiment of the present invention, FIG. 10 is a development view of the container according to the second embodiment of the present invention, and FIG. 11 is a foldable portion located at the end of the container. FIG. 12 shows a procedure for folding the foldable portion located at the end of the container and inserting the ear into the insertion port. It is explanatory drawing.
As shown in these drawings, in the container 1B according to the second embodiment of the present invention, the insertion port 37 is one of the four square portions 31 of the foldable portion 32 located at the end of the cylindrical portion 3. The container 1 </ b> A of the first embodiment is that the two ears 36 that are diagonally formed of the four ears 36 of the foldable portion 32 that are formed into one and folded are inserted in a state of being overlapped. Is different.

  In the container 1B of the second embodiment, as shown in FIG. 12A, when the foldable portion 32 located at the end of the cylindrical portion 3 is folded, and then the ear portion 36 is inserted into the insertion port 37 As shown in FIG. 12 (b), the ears 36 that overlap the upper part of the insertion port 37 are raised, and as shown in FIG. 12 (c), they are positioned diagonally to the insertion port 37. Raise the ear 36. And as shown to (d) of FIG. 12, it inserts in the insertion port 37 in the state which piled up the two ear | edge parts 36. FIG.

  According to such a container 1B, the number of the insertion ports 37 can be reduced as compared with the container 1A of the first embodiment. Moreover, since the center opening part 38 can be plugged by inserting in the insertion port 37 in the state which piled up the two ear | edge parts 36, there also exists an advantage that the sealing performance of the container 1B is improved.

  The insertion port 37 provided in the container 1B of the present embodiment connects points that divide each of the corner seal line L1 and the face seal line L2 in the square portion 31 into a: b = 2: 3 to 3: 2. It is preferably formed on a line, and particularly preferably formed on a line connecting the bisecting positions (positions where a = b) of the seal lines L1 and L2. In this way, an appropriate insertion depth is secured in the insertion port 37, so that the inserted ear portion 36 can be reliably held without making the insertion operation of the ear portion 36 difficult. That is, if the insertion depth of the insertion port 37 is shallower than that, there is a possibility that the two overlapping ears 36 cannot be securely held, and the insertion depth of the insertion port 37 is not sufficient. If it is deeper, it may be difficult to insert the two overlapping ears 36.

  By the way, when the two ear portions 36 are inserted in an overlapped state, the thickness of the lid portion 34 or the bottom portion 35 may be biased. This thickness deviation is not a significant problem when used as a container, but may be unfavorable because the thickness deviation is conspicuous in the folded storage state.

  Therefore, the container 1B of the present embodiment forms a plurality of foldable portions 32 arranged in the length direction in the entire region of the cylindrical portion 3, and folds all of the foldable portions 32 so that the entire cylindrical portion has a square shape. When the insertion port 37 is formed in the foldable portion 32 positioned at both ends of the cylindrical portion 3, the insertion port 37 of the foldable portion 32 positioned at one end of the cylindrical portion 3 is formed. And the insertion port 37 of the foldable portion 32 positioned at the other end of the cylindrical portion 3 are positioned at the diagonal of the square formed by the entire cylindrical portion when the entire cylindrical portion is folded. . In this way, when the whole is folded, the thickness deviation is equalized, so that a preferable storage state can be obtained.

  As mentioned above, although the preferable embodiment was shown and demonstrated about the container of this invention, this invention is not limited only to embodiment mentioned above, A various change implementation is possible within the scope of the present invention. Needless to say.

  For example, in the above-described embodiment, the example in which the number of insertion ports in one foldable portion is four and the example in which the number is one is shown. However, the number of insertion ports is two or three. It may be.

  Moreover, in embodiment mentioned above, although the three-layer bubble sheet is used as it is as a sheet material, you may laminate | stack a decoration film etc. further on the front and back of a three-layer bubble sheet. In this case, the sheet material substantially has a five-layer structure, but is based on a three-layer bubble sheet, and thus is changed within the scope of the present invention. In addition, the sheet material 2 may have a suitable rigidity and bending stiffness, and may be obtained by laminating other materials other than the synthetic resin film on both sides or one side as long as the sealing process is easy. For example, a woven fabric, a non-woven fabric, or the like can be laminated in order to make the sheet material difficult to tear or to make both the inner and outer surfaces of the container difficult to slip.

  The present invention can be applied to containers for various uses such as a packaging container, a packaging container, a storage container, and a transport container.

DESCRIPTION OF SYMBOLS 1 Container 2 Sheet material 3 Cylinder part 4 Adhesive tape 21 Protrusion 22 Cap film 23 Back film 24 Liner film 31 Square part 32 Foldable part 33 Partition part 34 Lid part 35 Bottom part 36 Ear part 37 Insertion port 38 Central opening part 39 Clearance L1 Corner seal line (Corner bending line)
L2 Face seal line (Fold line)
L3 Diagonal seal line (Diagonal bending line)
L4 edge line

Claims (9)

A container that is formed using a sheet material and includes a cylindrical section having a square cross section,
Four bendable corner bend lines formed at the corners of the tube portion, and adjacent bend lines of the same kind formed on the surface portion of the tube portion so as to be orthogonal to the corner bend lines or the tube A bendable surface fold line that forms four square parts arranged in the circumferential direction of the cylindrical part between the edge line of the part and a foldable diagonal fold formed along the diagonal line of the square part With a line,
The four square portions arranged in the circumferential direction of the cylindrical portion are the folds of the corner fold line and the face fold line forming the square portion, and the diagonal fold lines in the square portion are By constructing a foldable part that can be folded to the hollow part side of the cylindrical part by making a valley fold,
The foldable portion located at the end of the cylindrical portion functions as a lid or bottom for closing the end of the cylindrical portion when folded,
Furthermore, the foldable portion located at the end of the cylindrical portion is an insertion port that can hold at least one of the ear portions formed at the four corners when the foldable portion is folded. A container comprising:   In the square portion of the foldable portion located at the end of the cylindrical portion, the insertion port is parallel to the diagonal fold line at a corner portion formed by the corner fold line and the surface fold line. The container according to claim 1 formed as a cut line formed.   In the square portion of the foldable portion located at the end of the cylindrical portion, the insertion port is parallel to the diagonal fold line at a corner portion formed by the corner fold line and the surface fold line. The container according to claim 1, wherein the container is formed as a formed perforation line.   The said insertion port is formed in the four said square parts of the said foldable part located in the edge part of the said cylinder part, respectively, The four ear | edge parts of the said foldable part are each inserted. 4. The container according to any one of 3.   The insertion port is formed in any one of the four square portions of the foldable portion located at the end portion of the cylindrical portion, and among the four ear portions of the foldable portion that is folded. The container in any one of Claims 1-3 inserted in the state which two ear | edge parts located diagonally overlap.   The container according to claim 5, wherein the insertion port is formed on a line connecting points that internally divide the corner part bending line and the surface part bending line in the square part into 2: 3 to 3: 2. .   A plurality of the foldable portions arranged in the length direction are formed in the entire region of the cylindrical portion, and by folding all of the foldable portions, the entire cylindrical portion can be folded into a square shape, and the cylindrical portion In forming the insertion port in the foldable part located at both ends, the insertion port of the foldable part located at one end of the cylinder part and the other end of the cylinder part The container according to claim 5 or 6, wherein the insertion port of the foldable part is positioned at a diagonal of a square formed by the whole cylinder part when the whole cylinder part is folded.   The container according to any one of claims 1 to 7, wherein at least one of the surface bending lines is formed by a perforation.   The sheet material includes a cap film formed with a large number of protrusions that bulge in a hollow shape, a back film laminated on the opening side of the protrusions, and a liner film laminated on the top side of the protrusions. The container according to any one of claims 1 to 8, which is a lamellar cell sheet.

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