JP4234081B2 - Storage case - Google Patents

Description

  The present invention relates to a storage case for storing documents, and more particularly to a portable storage case made of an elastic synthetic resin.

  As a storage case, there is a storage case formed by bending an elastic synthetic resin plate body into a rectangular parallelepiped shape, and the storage case is integrated with a case main body formed in a rectangular parallelepiped shape with an upper end opening and a back plate upper end of the case main body. It is comprised from the cover body made into.

JP 2002-205728 A

This conventional storage case is an elastic synthetic resin storage case in which a lid 2 is connected to the upper end of a rear plate 11 of a case body 1 via a linear hinge portion h1, and a groove is formed on the case surface. The curved portion 25 is formed by slightly projecting the linear hinge portion h1 and its peripheral area toward the outer surface of the case. When the angle formed between the rear plate 11 and the lid portion 2 is smaller than 180 °, the curved portion 25 is formed. Projecting toward the inner surface of the case and maintaining the state thereof, the movement in the direction of closing the lid portion 2 is prevented, so that the stored items can be smoothly taken in and out.
On the other hand, by increasing the length between the top and bottom of the lid and increasing the number of overlapping portions of the front plate and the lid plate 24, the overall rigidity may be increased. There is a problem that it becomes inconvenient to open.

  Therefore, a main object of the present invention is to provide a storage case that makes it easier to open the cover plate.

The storage case according to claim 1 of the present invention is an elastic synthetic resin storage case in which a lid plate for closing the opening of the case body is connected to the upper end of the back plate of the case body via a bent portion. The lid opening auxiliary body constituting piece defined by the ruled line formed in the width direction of the elastic synthetic resin plate constituting the back plate and / or the cover plate is folded inward along the ruled line with the inner surface side as a valley, And a plurality of the opening assisting body constituting pieces are overlapped and connected on the outer surface side to form an opening assisting body, and at the time of closing, the opening assisting body protrudes toward the housing portion side of the case body, When the cover is opened, the storage case is formed so as to rotate around a portion near the outside of the opening assisting body.
In the storage case according to claim 2 of the present invention, the inner ruled line that partitions the elastic synthetic resin plate body to form the lid opening assisting body constituent piece among the overlapped opening assisting body constituting pieces is the lid plate. It is a storage case of Claim 1 which comprises the pivot axis when rotating.
According to a third aspect of the present invention, there is provided a storage case comprising: a first linear ruled line that forms the first opening assisting body constituting piece, and a second opening assisting body constituting piece. Between the linear second ruled line to be formed and the first lid opening assisting body component piece and the second lid opening assisting body component piece formed between the first ruled line and the second ruled line. A straight folding line for overlapping is formed in parallel with the first ruled line and the second ruled line, and the elastic synthetic resin plate body is located outside the elastic synthetic resin plate body in the folding line. The first lid opening assisting body component piece and the second lid opening assisting body component piece, which are bent so as to be overlapped, and are continuously provided across the folding curve, are overlapped. Is a storage case.
In the storage case according to a fourth aspect of the present invention, the first lid opening assisting body component piece and the second lid opening assisting body component piece include a linear first ruled line, a second ruled line, and a folding line. The first lid opening assisting body component piece and the second lid opening assisting body component piece, which are formed by line symmetry with respect to the folding curve and bent at the folding curve, are overlapped and folded first. The storage case according to claim 3, wherein the first ruled line and the second ruled line face each other so that a gap is formed between the first ruled line and the second ruled line.
In the storage case according to claim 5 of the present invention, the first ruled line and the second ruled line are defined as the first lid opening auxiliary body over the left and right end edges in the intermediate portion of the back plate and / or the cover plate. The component piece and the second lid opening assisting body component piece are formed in parallel with a distance corresponding to the height thereof, and the folding line is the first lid opening assisting body component piece and the second lid opening assisting member. The storage according to claim 3 or 4, wherein the outer surface of the back plate and / or the cover plate is formed in a flat shape on both sides of the first ruled line and the second ruled line. It is a case.
A storage case according to a sixth aspect of the present invention is the storage case according to any one of the first to fifth aspects, wherein the lid opening auxiliary body is formed such that the width thereof becomes narrower toward the upper side than the back plate.
In the storage case according to claim 7 of the present invention, the first lid opening assisting body component piece and the second lid opening assisting body component piece are linear first ruled lines, second ruled lines, and the first. The first lid opening auxiliary body component and the second lid opening auxiliary body, which are partitioned by the crease line and the fold line shorter than the second crease line, are formed symmetrically with respect to the fold line, and are bent at the fold line 7. The storage according to claim 6, wherein the component piece is overlapped, and the folded first auxiliary line and the second ruled line face each other to form a lid opening assisting body that narrows toward the folding line side. It is a case.

According to the present invention, the lid-opening auxiliary body constituting piece defined by the ruled line formed in the width direction of the elastic synthetic resin plate constituting the back plate and / or the cover plate has a valley on the inner surface side along the ruled line. As the opening assisting body is formed by folding and connecting a plurality of the opening assisting body component pieces on the outer surface side thereof, an elastic synthetic resin plate body that was originally flat is formed. In the part bent by the ruled line, because of its nature, it tries to return to the original flat plate shape, so when trying to open the lid plate, its force works in the direction to open the lid plate, and the lid plate is easy to open Become. In addition, the lid opening auxiliary body constituting piece is bent inward along the ruled line with the inner surface as a valley, and a plurality of the lid opening auxiliary body constituting pieces are overlapped and connected on the outer surface side to form the lid opening auxiliary body. Therefore, even if the opening / closing operation of the cover plate is repeated with the ruled line as a pivot, a storage case having excellent durability can be obtained without fatigue.
According to the invention of claim 2, among the overlapped lid opening auxiliary component pieces, the inner ruled line that partitions the elastic synthetic resin plate member and forms the lid opening auxiliary component piece is rotated by the lid plate. Since the pivot is used, the lid plate can be opened and closed with the inner ruled line as a hinge portion.
According to invention of Claim 3, the linear 1st ruled line which forms the said elastic synthetic-resin-made board body 1st lid opening auxiliary | assistant constituent piece, and the straight line which forms the 2nd lid opening auxiliary | assistance body structural piece. Between the first and second opening assisting body constituting pieces formed between the first ruled line and the second ruled line. A straight folding line for overlapping is formed in parallel with the first ruled line and the second ruled line, and the elastic synthetic resin plate is overlapped with the outer side of the elastic synthetic resin plate in the folding line. Since the first lid opening assisting body component piece and the second lid opening assisting body component piece that are bent in such a manner as to be continuous with the folding line interposed therebetween are overlapped, the ruled line is used as a hinge portion. The plate can be opened and closed.
According to the invention of claim 4, the first lid opening assisting body component piece and the second lid opening assisting body component piece are partitioned by the linear first ruled line, the second ruled line, and the folding line. The first opening assisting body component piece and the second lid opening assisting body component piece, which are formed symmetrically with respect to the folding line and folded at the folding line, are overlapped and folded, and the first ruled line is bent. Since the second ruled line faces and a gap is formed between the first ruled line and the second ruled line, it can be bent toward the gap and the lid can be opened and closed. it can.
According to the invention of claim 5, the first ruled line and the second ruled line are the first lid opening assisting component constituting piece across the left and right edges in the intermediate portion of the back plate and / or the cover plate. The fold curve is formed in parallel with the height of the second lid opening assisting body component piece, and the folding line is the first lid opening assisting body component piece and the second lid opening assisting body component piece. Since the outer surface of the back plate and / or the cover plate is aligned on both sides of the first ruled line and the second ruled line, the obstruction is caused when the cover plate is opened to the outer surface side. There is nothing to become and can greatly open the cover plate.
According to the sixth and seventh aspects of the invention, the lid opening assisting body is formed so that the width thereof becomes narrower toward the upper side from the back plate. The lid can be smoothly opened and closed without the body abutting the inside of the case body.

  The above-described object, other objects, features, and advantages of the present invention will become more apparent from the following description of the best mode for carrying out the invention with reference to the drawings.

1 is a front perspective view of a storage case according to an embodiment of the present invention, and FIG. 2 is a front perspective view of the storage case shown in FIG. FIG. 3 is a perspective view of the rear side of the storage case shown in FIG.
The storage case 10 includes a case main body 12 formed in a rectangular parallelepiped shape with a flat plate-like elastic synthetic resin plate 40 made of polypropylene, and the case main body 12 includes a front plate 14 having a rectangular shape in front view, and the front plate 14. A rear plate 16 having a rectangular shape in front view formed so as to face each other at an appropriate interval, and a bottom plate having a substantially rectangular shape in plan view that is laid on the lower edge between the front plate 14 and the back plate 16. 18, a pair of left and right side plates 20 and 22 having a rectangular shape in a side view formed between the front plate 14 and the back plate 16 at the top of the bottom plate 18, and an upper end edge of the back plate 16 And a cover plate 24 provided continuously with the cover plate.
The case body 12 includes a front plate 14, a back plate 16, a bottom plate 18, a gutter plate 20, and a plate-like elastic synthetic resin plate body 40, which is partitioned by ruled lines 34 that are recessed in the surface. It is formed by assembling the gutter plate 22 and the cover plate 24 into a cubic shape.

  The cover plate 24 is formed to have the same width as the front plate 14 and the back plate 16 in order to close the opening 12 a of the case body 12. The bottom plate 18 is substantially the same shape as the bottom plate 18, and the top portion 26 is followed by a front hanging portion 28 that hangs downward so as to face the back plate 16. A double hinge portion 24 a is formed between the top portion 26 and the front hanging portion 28, and a double hinge portion 24 b that is a bent portion is formed between the top portion 26 and the upper end edge of the back plate 16.

On the top side of the back plate 16, the gap portion 30 is located behind the top plate 26 of the cover plate 24 at a position where the thickness of the elastic synthetic resin plate body 40 is reduced by about 1 mm or more (in this embodiment, about 1 mm). A lid opening auxiliary body 32 is formed on the inner side of the gap portion 30 from the inner side surface of the back plate 16 toward the housing portion 12b side of the case body 12 in the width direction. Protruding toward it.
The back plate 16 is divided by a gap 30 and is divided into a lower back plate 16a on the bottom side of the gap 30 and an upper back plate 16b on the top side of the gap 30. The upper back plate 16b is It is formed lower than the height of the cover plate 24 extended to the uppermost part of the back plate 16, and in this embodiment, it is formed to be approximately half the height of the top portion 26.

  In this embodiment, the lid opening auxiliary body 32 is a lid opening auxiliary body defined by a ruled line 34 formed by a Thomson blade in the width direction on the outer surface of the elastic synthetic resin plate body 40 constituting the back plate 16. When the component pieces are folded inward along the ruled line 34 with the inner surface as a valley, and the lid opening auxiliary component pieces are overlapped and connected on the outer surface side, the ruled line 34 is bent and overlapped. A gap 30 is formed on the surface.

When the lid is closed, the lid opening auxiliary body 32 protrudes toward the housing portion 12b of the case main body 12, and when the lid is opened, a portion close to the outside of the lid opening auxiliary body 32, that is, the back plate 16 is provided. It is formed so as to rotate about a pivotal portion.
Therefore, the lid plate 24 can be bent by the ruled lines 34, and the gap portions 30 are formed between the ruled lines 34. Therefore, the portion connected to the back plate 16 is pivoted toward the gap portion 30 side. The lid plate 24 can be opened and closed by bending.

The ruled line 34 formed in the width direction on the outer surface of the elastic synthetic resin plate body 40 is a straight line for forming the first lid opening assisting body constituting piece 42 formed at a position close to the top portion 26 of the lid plate 24. First ruled line 44 and a straight line for forming a second lid opening assisting body constituent piece 46 which is connected to the first lid opening assisting body constituting piece 42 and formed on the side closer to the bottom plate 18. The second ruled line 48, and between the first ruled line 44 and the second ruled line 48, between the first lid opening assisting body component piece 42 and the second lid opening assisting body component piece 46, A linear fold for overlapping the first lid opening assisting body component piece 42 and the second lid opening assisting body component piece 46 formed in parallel with the first ruled line 44 and the second ruled line 48. Curve 50.
The first ruled line 44, the second ruled line 48, and the folding line 50 are continuously spaced at equal intervals from the left end edge to the right end edge of the back plate 16 by a Thomson blade (in this embodiment, A groove having a substantially U-shaped cross section having a width of about 1 mm and a depth of 0.3 mm is formed.
The left end edge of the second lid opening assisting body component piece 46 and the flange plate 20 are separated by a cutting blade, and the right edge of the second lid opening assisting body component piece 46 and the flange plate 22 are separated from each other. The space is separated by a cutting blade.

  The first lid opening assisting body component piece 42 and the second lid opening assisting body component piece 46 have substantially the same rectangular shape that is line-symmetric with respect to the folding line 50, and are connected with the folding line 50 interposed therebetween. Then, it is bent so that the outer surface of the elastic synthetic resin plate body 40 is overlapped at the folding line 50, and the first lid opening assisting body constituting piece 42 and the second lid opening assisting piece 46 are overlapped and bonded. The lid opening auxiliary body 32 is formed by being connected by an agent or welding.

  The first ruled line 44 and the second ruled line 48 are formed in the width direction of the back plate 16 on the outer surface of the elastic synthetic resin plate 40, and are partitioned by the first ruled line 44 and the second ruled line 48. When the first lid opening assisting body component piece 42 and the second lid opening assisting body component piece 46 are overlapped, the first ruled line 44 and the second ruled line 48 are formed on the elastic synthetic resin plate 40. The inner surface side is bent to an angle of 90 degrees inward, and the first lid opening assisting body component piece 42 and the second lid opening assisting body component piece 46 are overlapped and connected on the outer surface side. The first ruled line 44 and the second ruled line 48 face each other, and a gap 30 is formed between them. Both sides of the first lid opening assisting body component piece 42 and the second lid opening assisting body component piece 46 are formed. The rear plate 16 has a flat outer surface.

  Next to the uppermost portion of the back plate 16, that is, the top side of the first lid opening assisting body constituting piece 42, the back plate 16 and the cover plate 24 are partitioned, and the elastic synthetic resin plate 40 is placed on the inner surface side. A dent line 60 formed by the Thomson blade for bending toward the fold line and a dent line 62 formed by the Thomson blade at a slight distance parallel to the dent line 60 are formed from the left edge to the right edge in the width direction of the lid plate 24. It is formed continuously over. The interval between the dent line 60 and the first ruled line 44 is the same as that between the first ruled line 44 and the folding line 50 and between the folding line 50 and the second ruled line 48, that is, equal intervals. Is formed.

  The dent lines 60 and 62 are spaced apart from each other by an appropriate distance, and the dent lines 64 and the dent lines 64 are formed by a Thomson blade in parallel with the dent lines 60 and 62 at an appropriate distance. A dent line 66 is formed. The dent line 60 and the dent line 62 are formed with an interval of about 5 millimeters, for example, and the dent line 64 and the dent line 66 are also formed with an interval of about 5 mm. And the concave line 64 form a top portion 26 of the lid plate 24. The dent line 60, the dent line 62, the dent line 64, and the dent line 66, similarly to the ruled line 34, have an appropriate width (this) continuously from the left edge to the right edge of the bottom plate 18 and the cover plate 24 by the Thomson blade. In the embodiment, a substantially U-shaped groove having a width of about 1 mm and a depth of 0.3 mm is formed.

The double hinge portion 24b formed by the pair of dent lines 60 and the dent line 62 constitutes a double hinge portion that is bent with the inner side surface of the elastic synthetic resin plate body 40 as a valley side, and a pair of dent lines 64. The double hinge portion 24a formed by the dent line 66 constitutes a double hinge portion in which the elastic synthetic resin plate body 40 is bent with the inner surface as the valley side.
The lid plate 24 is normally bent slightly inward at the double hinge portion 24a and the double hinge portion 24b due to the elasticity of the elastic synthetic resin plate 40.

The side plate 20 and the side plate 22 are connected to the left and right end edges of the back plate 16 via the concave line 68 and the concave line 70, and further, the concave line 72 and the concave line 74 are provided outside the side plate 20 and the side plate 22. A front plate fixing piece 80 and a front plate fixing piece 82 for fixing the front plate 14 are connected to each other.
Thus, the saddle plate 20 and the saddle plate 22 bend the concave line 68 and the concave line 70 toward the inner side surface of the elastic synthetic resin plate body 40, and the front plate fixing piece 80 and the front plate fixing piece 82. The dent line 72 and the dent line 74 formed therebetween are bent toward the inner side surface of the elastic synthetic resin plate body 40 so that the front plate fixing piece 80 and the front plate fixing piece 82 face the inner side surface of the back plate 16. To form.

The front plate 14 is connected to the front side of the bottom plate 18 via a dent line 76 by a Thomson blade, and the back plate 16 is connected to the rear side of the bottom plate 18 via a dent line 78.
Then, the tongue 84 formed at the left and right corners of the front plate 14 is bent at the dent line 76 and the dent line 78 toward the inner side surface of the elastic synthetic resin plate 40 and the front plate fixing piece 80 and the front plate fixing piece. The front plate 14 can be fixed to the front plate fixing piece 80 and the front plate fixing piece 82 by being inserted into the insertion slits 86 formed in the cutout portions of both portions 82.

According to this embodiment, of the overlapped first lid opening assisting body constituting piece 42 and second lid opening assisting body constituting piece 46 constituting the lid opening assisting body 32, mainly the second lid opening assistance. The inner (lower) second ruled line 48 forming the body component piece 46 constitutes a pivot when the cover plate 24 rotates.
The first lid opening assisting body component piece 42 and the second lid opening assisting body component piece 46 are partitioned by a linear first ruled line 44, a second ruled line 48, and a folding line 50. The first lid opening auxiliary body constituting piece 42 and the second lid opening auxiliary body constituting piece 46 which are formed in line symmetry with respect to the folding line 50 and are folded along the folding line 50 are overlapped and bent. And the second ruled line 48 face each other, and the gap part 30 is formed between the first ruled line 44 and the second ruled line 48, so that it can be bent toward the gap part 30 side, The plate 24 can be opened and closed.
However, the first opening auxiliary body constituting piece 42 and the second opening auxiliary body constituting piece 46 are formed by the first ruled line 44 and the second ruled line 48, and the second ruled line 48 and the first ruled line 44 are formed. Since the elastic synthetic resin plate body 40 is bent to form a pivot portion with a relatively narrow groove width, the second ruled line 48 and the first ruled line 44 can be obtained even when the lid plate 24 is repeatedly opened and closed. Less fatigue and excellent durability.

Since the first lid opening assisting body constituting piece 42 and the second lid opening assisting body constituting piece 46 are overlapped and bonded together, the case main body 12 at the first ruled line 44 and the second ruled line 48. Is bent at an angle of about 90 degrees with the back plate 16 toward the housing portion 12b side, and the opening of the recessed portion of the second ruled line 48 is closed by the elasticity of the cover plate 24 and the elastic synthetic resin plate 40. The back plate 16a on the lower side of the back plate 16 connected to the second lid opening assisting member constituting piece 46 is returned to the flat plate shape that is the original state of the elastic synthetic resin plate 40. Force to try acts.
Further, in the first ruled line 44 formed between the first lid opening assisting component constituting piece 42 and the upper back plate 16 b constituting the back plate 16, the opening portion of the recessed portion of the first ruled line 44. A force to return the plate to the original flat state of the elastic synthetic resin plate body 40 acts on the first lid opening assisting component piece 42 and the back plate 16 in the closing direction.

Further, at the boundary between the back plate 16 and the top portion 26 of the lid plate 24, the double hinge portion 24 b formed of the dent line 60 and the dent line 62 formed on the elastic synthetic resin plate body 40 is also the dent line 60 and the dent line 62. The force which tries to return to the flat form which is the original state of the elastic synthetic resin board body 40 acts toward the direction which closes.
Therefore, when the lid plate 24 is opened, the elasticity of the elastic synthetic resin plate body 40 facilitates the relationship between the position where the lid opening auxiliary body 32 is formed and the weight of the lid plate 24 and the upper back plate 16b. The lid plate 24 can be opened.

The storage case 10 is mainly used for portable purposes, and a handle 90 is attached to the top portion 26 of the lid plate 24.
In addition, a fastener 92 for fastening the lid plate 24 is provided near the lower edge of the front hanging portion 28 of the lid plate 24, and a fastener 94 for latching the fastener 92 is provided on the outer surface of the front plate 14. Are attached at appropriate positions.

The present invention is not limited to the above embodiment, and various modifications can be made based on the idea of the present invention.
For example, as shown in FIGS. 9 and 10, the portion where the lid opening assisting piece is formed is not formed below the uppermost portion of the back plate, but is formed at a position closer to the top portion 26 of the lid plate 24. May be.
The lid opening assisting piece is not formed so as to protrude into the housing portion of the case body, but, for example, is adhered to the inner surface of the top portion 26 of the lid plate 24 and integrated with the top portion 26 of the lid plate 24. It may be.

As shown in FIGS. 11 and 12, the left and right edges of the lid opening assisting body 32 do not come into contact with the inner surface of the case body 12, in particular, the inner surfaces of the cover plate 22 and the lid plate 24. Left and right edges of the first lid opening assisting body component piece 42 and the second lid opening assisting body component piece 46 are cut out and inclined toward the folding line 50 so as to be narrower. You may make it dent in the V shape which becomes. The first lid opening assisting body component piece 42 and the second lid opening assisting body component piece 46 are formed symmetrically with respect to the folding line 50.
That is, the lid opening auxiliary body 32 may be formed in a short trapezoidal shape that becomes narrower toward the folding line 50.

It is a perspective view solution figure of the front side of the storage case which is one embodiment of this invention. FIG. 2 is a front perspective view of the storage case shown in FIG. 1 in an open state. It is a perspective view solution figure of the back side of the storage case shown in FIG. FIG. 2 is an AA cross-sectional view showing the main part of the storage case shown in FIG. 1. FIG. 3 is a cross-sectional view taken along the line B-B in FIG. 2 when the storage case shown in FIG. It is a top view of the synthetic resin board body which comprises a case main body. It is CC sectional drawing of the synthetic resin board body shown in FIG. FIG. 7 is an illustrative plan view of a D part shown in FIG. 6. It is the perspective view solution figure which made the cross section the part which shows another embodiment of a lid opening assistance piece. It is the perspective view solution figure which made the cross section the part which shows another embodiment of a lid opening assistance piece. It is a front side perspective view solution figure in the open state of the storage case which is another embodiment. FIG. 12 is an illustrative plan view of a main part of a synthetic resin plate constituting the case main body of the storage case shown in FIG. 11.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Storage case 12 Case main body 12a Opening part 12b Storage part 14 Front plate 16 Back plate 16a Lower back plate 16b Upper back plate 18 Bottom plate 20, 22 Cover plate 24 Cover plate 24a, 24b Double hinge part 26 Top part 28 Front hanging part 30 Gap part 32 Opening auxiliary body 34 Ruled line 40 Elastic synthetic resin plate 42 42 First opening auxiliary body constituting piece 44 First ruled line 46 Second lid opening auxiliary body constituting piece 48 Second ruled line 50 Folding curve 60, 62, 64, 66, 68, 70, 72, 74, 76, 78 Recessed line 80, 82 Front plate fixing piece 84 Tongue piece 86 Slit for insertion 90 Lever 92, 94 Fastener

Claims (7)

In a storage case made of an elastic synthetic resin in which a lid plate for closing the opening of the case main body through the bent portion is connected to the upper end of the back plate of the case main body,
The lid opening auxiliary body constituting piece defined by the ruled line formed in the width direction of the elastic synthetic resin plate constituting the back plate and / or the cover plate is folded inward along the ruled line with the inner surface side as a valley, And a plurality of the opening assisting body constituting pieces are overlapped and connected on the outer surface side to form an opening assisting body,
At the time of closing, the opening assisting body protrudes toward the housing part side of the case body,
A storage case formed so as to rotate around a portion close to the outside of the opening assisting body when the lid is opened.   The inside ruled line that partitions the elastic synthetic resin plate body and forms the lid opening assisting body component piece among the overlapped opening assisting body component pieces constitutes a pivot when the lid plate rotates. Item 1. The storage case according to Item 1.   A first linear ruled line that forms the first lid opening assisting body component piece, a second linear ruled line that forms a second lid opening assisting body component piece, Between the first lid opening auxiliary body constituting piece and the second lid opening auxiliary body constituting piece formed between the first ruled line and the second ruled line, the first ruled line and the second ruled line In parallel, a linear folding curve for overlapping is formed, and the elastic synthetic resin plate is folded so that the outside of the elastic synthetic resin plate overlaps the folding curve. The storage case according to claim 1 or 2, wherein a first lid opening assisting body component piece and a second lid opening assisting body component piece that are provided continuously across a curve are overlapped.   The first lid opening assisting body component piece and the second lid opening assisting body component piece are partitioned by a linear first ruled line, a second ruled line, and a folding line, and are symmetrical with respect to the folding line. The first lid opening assisting body component piece and the second lid opening assisting body component piece that are formed and folded at the folding line are overlapped, and the bent first ruled line and the second ruled line face each other, The storage case according to claim 3, wherein a gap is formed between the first ruled line and the second ruled line. Across the left and right edges in the middle part of the back plate and / or lid plate,
The first ruled line and the second ruled line are formed in parallel with a distance corresponding to the height of the first lid opening assisting body component piece and the second lid opening assisting body component piece, and the folding line. Is formed between the first lid opening assisting body component piece and the second lid opening assisting body component piece, and on both sides of the first ruled line and the second ruled line, the back plate and / or the lid plate The storage case according to claim 3 or 4, wherein the outer surface is aligned in a flat shape.   6. The storage case according to claim 1, wherein the lid opening auxiliary body is formed so that the width thereof becomes narrower toward the upper side from the back plate.   The first lid opening assisting body component piece and the second lid opening assisting body component piece include a linear first ruled line, a second ruled line, and a folding line shorter than the first ruled line and the second ruled line. The first lid opening assisting body component piece and the second lid opening assisting body component piece, which are defined by the line and formed symmetrically with respect to the folding line and folded at the folding line, are overlapped and folded first. The storage case according to claim 6, wherein an opening assisting body is formed in which the ruled line and the second ruled line face each other and become narrower toward the folding line side.

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