Storage box and unfolded sheet

Abstract

Provided is a storage box that can prevent displacement of goods without using a bubble cushioning material made of a synthetic film. 【Solution means】The storage box 10 according to the present invention includes a rectangular paper box body 100, and a single buffer material deployment sheet 130A disposed inside the box body 100 and formed by folding along a folding line 138, a mount 130 having a contact portion 131 and a leg portion 132 adjacent to the contact portion 131 with the folding line 138 therebetween, and the folding portion 138 is a curve or a broken line that is convex from the commodity contact portion side toward the leg portion side.

Description

Technical Field

[0001] The present invention relates to a storage box, a cushioning material disposed inside the storage box, and a deployment sheet.

Background Art

[0002] In a cosmetic box used for packaging products, a mount board is used to arrange the products accommodated in the cosmetic box beautifully and to prevent the positions of the products from shifting even when they are subjected to some impact. Usually, the mount board is formed by folding a single sheet of cardboard and has a product placement portion, which is the portion where the product is placed, and a pair of legs. Some mount boards also have partition portions for partitioning the area where the products are arranged, raised portions for defining the positions of the products, and openings.

[0003] The mount board is disposed inside the cosmetic box with the legs facing down and the product placement facing up, and the product is placed on the product placement portion. Since the product placement portion is positioned slightly above the bottom surface of the cosmetic box (lifted from the bottom) by the legs, effects such as the product placed on the product placement portion being more visible from the outside and the product being easier to take out can be obtained.

[0004] Also, by using a mount board, for example, when a product purchaser puts the cosmetic box into a shopping bag or the like and carries it, it is possible to prevent the arrangement of the products accommodated in the cosmetic box from collapsing. On the other hand, in the case of being mounted on a vehicle or the like and transported, even if a mount board is used, the products accommodated in the cosmetic box may move and the arrangement may collapse due to the impact received during the transportation work. When there is a gap between the product and the cosmetic box, not only may the product move in the cosmetic box, but the product may also be damaged. Therefore, an air cushioning material is placed between the cosmetic box and the product to prevent the product from moving even when it is subjected to impact.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] One of the cushioning materials for putting in a cosmetic case is a bubble cushioning material (Patent Document 1). The bubble cushioning material has a large number of air bubble sealing parts between two synthetic resin films. Since it has a high cushioning effect and is lightweight, it is widely used as a cushioning material for various products. However, while the cosmetic case and the mount are made of paper, the bubble cushioning material is made of a synthetic resin film, so it is necessary to separate it from the cosmetic case and the mount at the time of disposal. Also, from the perspective of the microplastic problem, the use of bubble cushioning materials made of synthetic resin films is being reexamined.

[0007] Here, the cosmetic case has been described as an example, but the same problem exists not only in cosmetic cases but also in various storage boxes in which articles are stored inside packing boxes, shipping boxes, etc.

[0008] The problem to be solved by the present invention is to provide a storage box that can prevent the displacement of products without using a bubble cushioning material made of a synthetic resin film.

Means for Solving the Problems

[0009] The storage box according to the present invention made to solve the above problems is a rectangular box body, a cushioning material having a contact portion formed by bending a single cushioning material deployment sheet disposed inside the box body along a bending line, and a leg portion adjacent to the contact portion with the bending line interposed therebetween and is provided with characterized in that the bent portion is a curve or a broken line that protrudes from the contact portion side toward the leg portion side.

[0010] In the storage box with the above structure, in the case where the box body is the box main body for accommodating goods, the cushioning material is arranged on the bottom surface inside the box main body such that the legs face downward and the article contact portion faces upward. Then, an article is placed on the contact portion of the cushioning material arranged on the box main body. That is, the cushioning material in this case functions as a backing sheet. On the other hand, in the case where the box body is a lid, the cushioning material is arranged on the top surface inside the lid such that the legs face upward and the contact portion faces downward. Therefore, when the lid with the cushioning material arranged on the top surface is placed on the box main body, the contact portion of the cushioning material contacts the upper portion of the article accommodated inside the box main body.

[0011] The cushioning material is formed by bending a single cushioning material unfolding sheet along a folding line to form a contact portion and legs adjacent to the contact portion with the folding line therebetween. In the cushioning material unfolding sheet, since the bent portion is a curve or a folding line that bulges from the contact portion side toward the leg side, when the folding line is bent to form the contact portion and the legs, the legs curve so as to bulge downward. When such legs are directed downward and the backing sheet is accommodated inside the box body, an upward force acts on the contact portion due to the force (restoring force) with which the legs and the contact portion attempt to restore to a continuous plane. Also, due to the elasticity (springiness) of the legs by such a restoring force, even without a cushioning material such as a bubble cushioning material, when a product is placed on the contact portion, a shock mitigation effect and a shock absorption effect on the product can be obtained.

[0012] In this case, if one or a plurality of cuts are formed in the contact portion to release the force acting on the contact portion, the magnitude and direction of the force acting on the product from the contact portion can be adjusted.

[0013] In the above structure, it is preferable that the cushioning material is formed by folding the cushioning material unfolding sheet along two folding lines provided at a predetermined interval in the cushioning material unfolding sheet, and has one contact portion and two legs.

[0014] By having two legs, the restoring force acting between the legs and the contact portion is increased, so that the shock mitigation effect and the shock absorption effect obtained when an article is placed on the contact portion can be made greater.

[0015] Further, in the deployment sheet for the cushioning material, it is preferable that the bending curve is an arc curve configured such that the distance between the straight line connecting both ends of the bending curve and the bending curve gradually increases from both ends of the straight line toward the center.

[0016] In this case, when the thickness of the deployment sheet for the cushioning material is 0.1 mm to 1.0 mm, it is preferable that the ratio of the maximum value of the distance to the length of the straight line is 1 / 5000 to 1 / 500.

[0017] According to the above configuration, since the portion between the legs and the contact portion can be smoothly bent, a good-looking cushioning material can be obtained.

[0018] In the storage box described above, either one of the locking piece that restricts the vertical movement of the contact portion in the box body and the engaging portion with which the locking piece engages is provided on either one of the box body and the cushioning material, and the other of the locking piece and the engaging portion is preferably provided on the other of the box body and the cushioning material.

[0019] According to the above configuration, the position of the contact portion in the box body can be fixed.

[0020] In the storage box having the above configuration, the box body is formed by bending a single deployment sheet for the box body, and the deployment sheet for the cushioning material can be integrally formed with the deployment sheet for the box body.

[0021] Also, in the storage box with the above configuration, there is one rectangular bottom plate portion, four side wall portions extending along the four sides of the bottom plate portion, and two buffer material portions extending along the end edges on the opposite side of the bottom plate portion of two of the four side wall portions facing each other. A box body formed by bending the one bottom plate portion and the four side wall portions of one unfolded sheet for a storage box, and a buffer material formed by bending the two buffer material portions. The buffer material portion has a bending line parallel to the end edge, a contact portion adjacent to and sandwiching the bending line, and a leg portion. The bending line can be a curve or a broken line that is convex from the contact portion side toward the leg portion side.

[0022] Another aspect of the present invention made to solve the above problems is A buffer material having a contact portion and a leg portion adjacent to the contact portion with the bending line therebetween, formed by bending one unfolded sheet for a buffer material disposed inside a rectangular box body along the bending line. The bending portion is characterized in that it is a curve or a broken line that is convex from the contact portion side toward the leg portion side.

[0023] Still another aspect of the present invention made to solve the above problems is An unfolded sheet for a storage box having one rectangular bottom plate portion, four side wall portions extending along the four sides of the bottom plate portion, and two buffer material portions extending along the end edges on the opposite side of the bottom plate portion of two of the four side wall portions facing each other. The buffer material portion has a bending line parallel to the end edge, a contact portion adjacent to and sandwiching the bending line, and a leg portion. The unfolded sheet for a storage box, wherein the bending line is a curve or a broken line that is convex from the contact portion side toward the leg portion side.

Advantages of the Invention

[0024] According to the present invention, it is possible to prevent the displacement of the goods stored in the storage box without using a bubble buffer material.

Brief Description of the Drawings

[0025]

Figure 1

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Figure 17

Modes for Carrying Out the Invention

[0026] Hereinafter, embodiments for carrying out the present invention will be described with specific examples. All of the examples described below are examples in which the storage box according to the present invention is applied to a cosmetic box. Generally, a cosmetic box refers to a decorated cardboard box used when presenting a gift, and has a function of protecting the product stored inside. However, the present invention is also applicable to storage boxes having a function of protecting products stored inside, such as packing boxes and packaging boxes, other than cosmetic boxes.

Example

[0027] FIG. 1 is a perspective view of the cosmetic box according to Example 1, and FIG. 2 is a perspective view of the cosmetic box with the lid removed. For convenience of explanation, illustration of the decoration applied to the cosmetic box is omitted. The cosmetic box 10 according to the present embodiment is a slightly flat cubic box with a lid, and includes a box body 110, a lid 120, and two cardboards 130 and 140 disposed inside the box body 110. The box body 110 corresponds to the box body of the present invention, and the cardboards 130 and 140 correspond to the cushioning materials of the present invention.

[0028] Inside the box body 110, a partitioning member 111 for partitioning the inside is disposed. As shown in FIG. 3, the partitioning member 111 has a partition plate 112 and a pair of legs 113. The inside of the box body 110 is partitioned into two by the partitioning member 111, and two accommodating portions 1101 and 1102 having substantially the same shape are formed. The lid 120 is slightly larger than the box body 110, and when the lid 120 is placed on the box body 110, substantially the entire box body 110 is covered by the lid 120.

[0029] Figs. 4 and 5 are perspective views of the backing papers 130 and 140. The backing paper 130 includes a rectangular product placement portion 131, two legs 132, 132 continuous with both sides in the width direction of the product placement portion 131, and an inclined portion 133 continuous with one end side in the length direction of the product placement portion 131. A locking piece 134 is formed at the center of the other end in the length direction of the product placement portion 131. The backing paper 140 has substantially the same configuration as the backing paper 130, and includes a product placement portion 141, two legs 142, 142, an inclined portion 143, and a locking piece 144. A plurality of cut-ups 145 for defining the position of the product are formed in the product placement portion 141 of the backing paper 140, which is different from the backing paper 130 in this respect. The product placement portions 131 and 141 of the backing papers 130 and 140 correspond to the abutting portions of the present invention.

[0030] As shown in Fig. 6(a), at the center of the upper edge of one end in the longitudinal direction of the accommodating portions 1101 and 1102 of the box body 110, a locking piece 1103 protruding inward of the accommodating portions 1101 and 1102 is formed. Also, as shown in Fig. 6(b), at the center of the lower part of the other end in the longitudinal direction of the accommodating portions 1101 and 1102 of the box body 110, an insertion port 1104 is formed. The insertion port 1104 is located slightly above the bottom surface of the accommodating portions 1101 and 1102.

[0031] When the backing paper 130 or 140 is disposed inside the accommodating portions 1101 and 1102, its locking piece 134 or 144 is inserted into the insertion port 1104, and the leading edge of the inclined portion 133 or 143 abuts against the locking piece 1103. In this embodiment, the locking pieces 134 and 144 and the locking piece 1103 respectively correspond to the locking pieces of the present invention, and the insertion port 1104 and the inclined portions 133 and 143 correspond to the engaging portions of the present invention.

[0032] The box body 110, the lid 120, the partition member 111, the backing paper 130, and the backing paper 140 are all formed by folding a developed sheet made of cardboard of the same thickness. Hereinafter, the developed sheets 111A, 130A, and 140A of the partition member 111, the backing paper 130, and the backing paper 140 will be described. The developed sheets 130A and 140A respectively correspond to the developed sheets for the cushioning material of the present invention. The developed sheets 111A, 130A, and 140A of the partition member 111, the backing paper 130, and the backing paper 140 are all formed by subjecting a single cardboard sheet to Thomson (die-cutting) processing. Although the box body 110 and the lid 120 are also formed by folding a developed sheet made of cardboard, the description thereof is omitted here.

[0033] FIG. 7 is a plan view of the developed sheet 111A of the partition member 111. The developed sheet 111A includes a rectangular partition plate portion 112A and two elongated rectangular leg portions 113A that are slightly longer than the partition plate portion 112A extending along two opposite sides of the partition plate portion 112A. The arrow shown inside the developed sheet 111A represents the grain direction (in the following description, the arrows in the developed sheet represent the grain direction). Similarly, a mountain fold line 114 is formed at the center in the width direction of the partition plate portion 112A, and valley fold lines 115 are formed at the boundaries between the partition plate portion 112A and the two leg portions 113A, respectively. By folding along the mountain fold line 114 and the valley fold lines 115, the partition member 111 is formed.

[0034] FIG. 8 is a plan view of the developed sheet 130A of the backing paper 130. The developed sheet 130A has a product placement portion 131A, leg portions 132A, an inclined portion 133A, and a locking piece portion 134A corresponding to the product placement portion 131, the two leg portions 132, 132, the inclined portion 133, and the locking piece 134 of the backing paper 130. Mountain fold lines 138, 138 are formed at the boundaries between the product placement portion 131A and the leg portions 132A, and a valley fold line 139 is formed at the boundary between the product placement portion 131A and the inclined portion 133A. The mountain fold lines 138, 138 correspond to the folding lines of the present invention.

[0035] FIG. 9 is a plan view of the unfolded sheet 140A of the mount 140. The unfolded sheet 140A has a product placement portion 141A, a leg portion 142A, an inclined portion 143A, and a locking piece portion 144A, similar to the unfolded sheet 130A. At the boundary between the product placement portion 141A and the leg portion 142A, mountain fold lines 148, 148 are formed, and at the boundary between the product placement portion 141A and the inclined portion 143A, a valley fold line 149 is formed. The mountain fold lines 148, 148 correspond to the folding lines of the present invention. Note that a cut line 145A for the cut-up 145 is formed in the product placement portion 141A of the unfolded sheet 140A.

[0036] The mountain fold line 138 is composed of a curve that is slightly convex from the side of the product placement portion 131 toward the side of the leg portion 132. In particular, in this embodiment, when a straight line connecting both ends of the mountain fold line 138 is defined as L0, the distance between the straight line L0 and the mountain fold line 138 is composed of an arc curve that gradually increases from both ends of the straight line L0 toward the center. Therefore, when the product placement portion 131 and the leg portion 132 are formed by folding along the mountain fold line 138, the leg portion 132 is slightly curved so as to be convex downward. When the mount 130 is housed inside the box body 110 (accommodation portion 1101) with such a leg portion 132 facing downward, due to the force (restoring force) with which the leg portion 132 and the product placement portion 131 attempt to restore to a continuous plane an upward force acts on the product placement portion 131. Moreover, since the mountain fold line 138 is substantially orthogonal to the paper grain, the restoring force becomes even greater. Further, due to the elasticity (springiness) of the leg portion 132 by such a restoring force, a shock mitigation action and a shock absorption action with respect to the product placed on the product placement portion 131 can be obtained.

[0037] Also, similar to the mountain fold line 138, when a straight line connecting both ends of the mountain fold line 148 is defined as L0, the distance between the straight line L0 and the mountain fold line 148 is composed of an arc curve that gradually increases from both ends of the straight line L0 toward the center. Therefore, also in the product placement portion 141 of the mount 140, similar to the product placement portion 131 of the mount 130, a shock mitigation action and a shock absorption action with respect to the product placed thereon can be obtained.

[0038] Here, the maximum value of the distances between the above-mentioned straight line L0 and the mountain fold lines 138 and 148 (that is, the distances between the mountain fold lines 138 and 148 at the center of the straight line L0) should be set to appropriate values according to conditions such as the length of the straight line L0, the thicknesses of the unfolded sheets 130A and 140A, the areas of the product placement parts 131 and 141, and the elastic forces of the unfolded sheets 130A and 140A. For example, when the thicknesses of the unfolded sheets 130A and 140A are 0.5 mm and the length of the straight line L0 is 160 mm, the maximum value of the distance is preferably set to 0.032 to 0.32 mm. By setting it within this numerical range, the mountain fold lines 138 and 148 can be bent without difficulty, and moreover, the shock mitigation effect and shock absorption effect on the products placed on the product placement parts 131 and 141 can be obtained.

[0039] FIG. 10 shows a state in which the mount 130 having the above configuration is accommodated in the accommodation part 1101 of the box body 110, a product 100 is placed on the product placement part 131, and then the lid 120 is put on. In the state where the lid 120 is put on, the product 100 is in contact with the back surface of the lid 120, a pushing-up force acts on the lid 120 from below, and as a reaction, the product placement part 131 is in a state of being pushed downward. In such a state, an upward force (the force indicated by the white arrow 21) acts on the product placement part 131 due to the restoring force of the leg part 132, and the movement of the product 100 placed on the product placement part 131 is prevented. Also, the shock mitigation effect and shock absorption effect are obtained due to the elasticity (springiness) of the leg parts 132 and 132. For this reason, even if a cushioning material such as a bubble cushioning material is not used, it is possible to prevent the product 100 from moving and being damaged in the accommodation part 1101 when the cosmetic case 10 is transported. The same applies to the product stored in the accommodation part 1102.

Example

[0040] Example 2 is an example in which the storage box according to the present invention is applied to a cosmetic case, similar to Example 1. However, the cosmetic case of Example 2 is different from the cosmetic case of Example 1 in that cushioning materials are arranged on both the box body and the lid. That is, in the present example, the box body and the lid correspond to the box body of the present invention. Since the configuration of the box body is the same as that of Example 1, the illustration and description are omitted.

[0041] FIG. 11 is a perspective view showing the lid 220 of the cosmetic case according to the second embodiment. As shown in FIG. 11, one cushioning member 230 is disposed inside the lid 220. The cushioning member 230 has a contact portion 231 that is substantially the same rectangular shape as the bottom plate portion of the lid 220, and a pair of leg portions extending from two opposite sides of the contact portion 231. In FIG. 11, the leg portions are hidden by the contact portion 231 and not visible. Four arc-shaped cuts 232 with an angle of approximately 90° are formed in the contact portion 231. Each cut 232 is radially arranged around the center of the contact portion 231 so that the convex sides face each other.

[0042] FIG. 12 is a plan view of the developed sheet 220A of the lid 220. The developed sheet 220A of the lid 220 has a rectangular bottom plate portion 221A corresponding to the bottom plate of the lid 220, and side wall portions 222A corresponding to the four side wall portions 222 of the lid 220. The side wall portion 222A has an outer wall portion 223A, an inner wall portion 224A, and a flange portion 225A in order from the bottom plate portion 221A side. Further, a fold 226 is provided between two adjacent outer wall portions 223A, and insertion pieces 227 are provided on both sides of the inner wall portion 224A constituting two opposite side wall portions 222A. Further, engaging holes 228 each formed of a cutout hole are formed at the boundaries between the inner wall portion 224A and the flange portion 225A of the four side wall portions 222A.

[0043] In FIG. 12, the fine dashed line and the thick dashed line respectively indicate a mountain fold line and a valley fold line as viewed from the inside of the lid 220. Further, the solid line indicates a cut line. The lid 220 is formed by mountain folding and valley folding the developed sheet 220A along the mountain fold line and the valley fold line.

[0044] FIG. 13 is a plan view of the unfolded sheet 230A of the cushioning material 230. The unfolded sheet 230A of the cushioning material 230 has a contact portion 231A corresponding to the contact portion 231, and two leg portions 233A corresponding to the legs, which are extended to two opposite sides of the contact portion 231A. A mountain fold line 234 is provided at the boundary between the contact portion 231A and the leg portion 233A, and a locking piece 235 formed of a cut-up piece is formed at the center of the mountain fold line. In addition, locking pieces 236 are formed on two sides of the four sides of the contact portion 231A where the leg portion 233A is not extended. Note that the above-described four cuts 232 are formed in the contact portion 231A.

[0045] The cushioning material 230 is formed by folding the unfolded sheet 230A along the mountain fold line 234, and has one contact portion 231, two legs, and locking pieces 235 or locking pieces 236 on the four sides of the contact portion 231.

[0046] At this time, the mountain fold line 234 is formed of a curve that is slightly convex from the contact portion 231A side toward the leg portion 233A side. Specifically, it is formed of an arc curve in which the distance between a straight line (not shown) connecting both ends of the mountain fold line 234 and the mountain fold line 234 gradually increases from both ends of the straight line toward the center. Therefore, when the contact portion 231 and the legs are formed by folding along the mountain fold line 234, the legs are slightly curved so as to be convex downward. When the cushioning material 230 is housed inside the lid 220 with such legs facing downward, an upward force acts on the contact portion 231 due to the force (restoring force) with which the legs and the contact portion 231 attempt to restore to a continuous plane. At this time, since four arc-shaped cuts 232 are formed in the contact portion 231, a part of the restoring force is released by the cuts 232, and the portion surrounded by the cuts 232 (referred to as a cut piece 2321) is separated from the other portions.

[0047] When such a lid 220 is placed on the box body 110 (refer to Embodiment 1), the contact portion 231 of the cushioning material 230 contacts the product stored in the box body 110, and the impact mitigation effect and impact absorption effect on the product are obtained by the elasticity (spring property) of the cut piece 2321. For the said product, the impact mitigation effect and impact absorption effect are also obtained from the product placement portions 131, 141 of the mounting boards 130, 140 arranged in the box body 110. That is, in this embodiment, the impact mitigation effect and impact absorption effect act on the product from above and below, and the product can be further protected.

Embodiment

[0048] Embodiment 3 is an embodiment in which the storage box according to the present invention is applied to a cosmetic box, similar to Embodiment 2, and cushioning materials are arranged on both the box body and the lid. Therefore, also in this embodiment, the box body and the lid correspond to the box body of the present invention. Since the configuration of the box body is the same as that of Embodiment 1, the illustration and description are omitted, and the configuration of the lid will be described.

[0049] FIG. 14 is a diagram showing the lid 320 of Embodiment 3 by perspective projection. As shown in FIG. 14, two cushioning materials 330, 340 are arranged side by side inside the lid 320. The cushioning materials 330, 340 each have a rectangular contact portion 331, 341 that divides the bottom plate of the lid 320 into two equal parts, and one leg portion extending from one long side of the corresponding contact portion 331, 341. In FIG. 14, the leg portions are hidden by the contact portions 331, 341 and cannot be seen.

[0050] One U-shaped cut 332 that is long in the longitudinal direction of the contact portion 331 is formed in the contact portion 331, and one arc-shaped cut 342 is formed in the contact portion 341 along the longitudinal direction of the contact portion 341. The cushioning materials 330, 340 are arranged in the lid 320 such that the concave sides of the cuts 332, 342 face each other.

[0051] In this embodiment, it is characterized in that the lid 320 and the buffer materials 330 and 340 are integrally formed. Specifically, the lid 320 and the buffer materials 330 and 340 are formed by bending a single cardboard unfolded sheet 350 shown in FIG. 15. Therefore, the unfolded sheet 350 has a lid portion 320A corresponding to the lid 320, a buffer material portion 330A corresponding to the buffer material 330, and a buffer material portion 340A corresponding to the buffer material 340. The shape of the lid portion 320A is substantially the same as the shape of the unfolded sheet 220A of Embodiment 2, and has a bottom plate portion 321A and side wall portions 322A corresponding to the four side walls of the lid 320.

[0052] Of the four side wall portions 322A, two opposing side wall portions 322A have, in order from the bottom plate portion 321A side, an outer wall portion 323A, an inner wall portion 324A, and a flange portion 325A. On the other hand, the remaining two opposing side wall portions 322A of the four side wall portions 222A have, in order from the bottom plate portion 321A side, an outer wall portion 323A and an inner wall portion 324A. Fold lines 326 are provided between two adjacent outer wall portions 323A of the four side wall portions 322A. In addition, insertion pieces 327 are provided on both sides of the inner wall portion 324A constituting the two side wall portions 322A having the flange portion 325A, and engaging holes 328 each formed of a cutout hole are formed at the boundaries between the inner wall portion 324A and the flange portion 325A of the two side wall portions 322A having the flange portion 325A.

[0053] The buffer material portions 330A and 340A extend to the end edges of the inner wall portions 324A of the two side wall portions 322A that do not have the flange portion 325A. The buffer material portion 330A has a contact portion 331A corresponding to the contact portion 331 and a leg portion 333A corresponding to the leg portion. On the other hand, the buffer material portion 340A has a contact portion 341A corresponding to the contact portion 341 and a leg portion 343A corresponding to the leg portion. Locking pieces 336 and 346 that engage with the engaging holes 328 are formed on both sides near the leg portions 333A and 343A of the contact portions 331A and 341A. In addition, cuts 332 and 342 are formed in the contact portions 331A and 341A, respectively.

[0054] In FIG. 15, the fine dashed line and the thick dashed line of the eye respectively indicate a mountain fold line and a valley fold line when viewed from the inside of the lid 320. The solid line indicates a cut-off line. By mountain-folding and valley-folding the unfolded sheet 350 along the mountain fold line and the valley fold line and inserting the locking pieces 336 and 346 into the engaging holes 328, the lid 320 and the buffer members 330 and 340 are integrally formed.

[0055] At this time, the valley fold line 335 at the boundary between the contact portion 331A and the leg portion 333A of the buffer member portion 330A is composed of an arc curve that is slightly convex from the contact portion 331A side toward the leg portion 333A side, similar to the mountain fold line 234 of the second embodiment. Also, the valley fold line 345 at the boundary between the contact portion 341A and the leg portion 343A of the buffer member portion 340A is composed of an arc curve that is slightly convex from the contact portion 341A side toward the leg portion 343A side, similar to the mountain fold line 234 of the second embodiment. Specifically, it is composed of an arc curve in which the distance between the straight line (not shown) connecting both ends of the valley fold lines 335 and 345 and the valley fold lines 335 and 345 gradually increases from both ends of the straight line toward the center. Therefore, when the buffer member 330 having the contact portion 331 and the leg portion is formed by folding along the valley fold line 335, the leg portion is slightly curved so as to protrude downward. Similarly, when the buffer member 340 having the contact portion 341 and the leg portion is formed by folding along the valley fold line 345, the leg portion is slightly curved so as to protrude downward.

[0056] As a result, in the buffer member 330, an upward force acts on the contact portion 331 due to the force (restoring force) with which the leg portion and the contact portion 331 try to restore to a continuous plane. Also, in the buffer member 340, an upward force acts on the contact portion 341 due to the force (restoring force) with which the leg portion and the contact portion 341 try to restore to a continuous plane. At this time, since the cuts 332 and 342 are formed in the contact portions 331 and 341, a part of the restoring force is released by the cuts 332 and 342, and the portions (cut pieces 3321 and 3421) surrounded by the cuts 332 and 342 are separated from the other portions.

[0057] When such a lid 320 is placed on the box body 110 (see Embodiment 1), the contact portions 331 and 341 of the cushioning materials 330 and 340 come into contact with the product stored in the box body 110, and the impact mitigation effect and impact absorption effect on the product are obtained by the elasticity (springiness) of the cut pieces 3321 and 3421. With respect to the said product, the impact mitigation effect and impact absorption effect are also obtained from the product placement portions 131 and 141 of the mounting boards 130 and 140 arranged on the box body 110. That is, also in this embodiment, similar to Embodiment 2, the impact mitigation effect and impact absorption effect act on the product from above and below, and the product can be further protected from external forces.

[0058] [Modification Example] Note that the present invention is not limited to the above-described embodiments, and can be modified, for example, into the following examples.

[0059] Instead of the mounting boards 130 and 140 described in Embodiment 1, mounting boards 400 and 500 having shapes as shown in FIGS. 16 and 17 can be used, for example. The mounting board 400 includes a product placement portion 431, two legs 432, and a V-shaped inclined portion 401. The mounting board 400 is different from the mounting board 130 in the shape of the inclined portion 401 and the absence of locking pieces.

[0060] Also, the mounting board 500 is composed only of a product placement portion 531 and two legs 532, and is different from the mounting board 130 in that it does not have an inclined portion or locking pieces. Of course, the mounting boards 400 and 500 may be provided with cut-ups 145 like those of the mounting board 140.

[0061] In addition to arranging the cushioning material 230 of Embodiment 2 inside the lid, it may be arranged inside the box body. In this case, the cushioning material 230 functions as a mounting board. Also, in the cosmetic boxes of Embodiments 2 and 3, cushioning materials (mounting boards) are arranged on both the lid and the box body, but the cushioning material (mounting board) of the box body may be omitted. Furthermore, when the box body (box body, lid) and the cushioning material are separate bodies, the box body is not limited to being made of paper, and can be made of various materials such as wood, metal, plastic, etc.

Explanation of Reference Numerals

[0062] 10…Cosmetic case 110…Case body 120, 220, 320…Lid 130, 140, 400, 500…Mounting board 130A, 140A, 230A…Expansion sheet (expansion sheet for cushioning material) 131, 141…Product placement part (contact part) 132, 142…Legs 230, 330, 340…Cushioning material 231, 331, 341…Contact part 350…Expansion sheet (expansion sheet for storage box) 138, 148…Mountain fold line (bending line) 335, 345…Valley fold line (bending line)

Claims

1. A box body having a rectangular bottom plate portion, A cushioning material disposed inside the box body, formed by bending a single cushioning material deployment sheet along a folding line, having a product contact portion and legs adjacent to the product contact portion across the folding line and bent along the folding line, Comprising, The folding line is a curve or a broken line that is convex from the product contact portion side toward the leg portion side, The cushioning material is disposed inside the box body such that the legs are positioned between the product contact portion and the bottom plate portion, The box body is formed by bending a single box body deployment sheet, A storage box in which the cushioning material deployment sheet is integrally formed with the box body deployment sheet.

2. The storage box according to claim 1, wherein the cushioning material is formed by bending the cushioning material deployment sheet along two folding lines provided at a predetermined interval on the cushioning material deployment sheet, and has one product contact portion and two legs.

3. The storage box according to claim 1, wherein in the cushioning material deployment sheet, the folding line is an arc curve configured such that the distance between the straight line connecting both ends of the folding line and the folding line gradually increases from both ends of the straight line toward the center.

4. The storage box according to claim 3, wherein the thickness of the cushioning material deployment sheet is 0.1 mm to 1.0 mm, and the ratio of the maximum value of the distance to the length of the straight line is 1 / 5000 to 1 / 500.

5. Either a locking piece for restricting the vertical movement of the product contact portion in the box body or an engaging portion with which the locking piece engages is provided on either the box body or the cushioning material, and the other of the locking piece and the engaging portion is provided on the other of the box body and the cushioning material. The storage box according to claim 1.

6. The storage box according to claim 1, wherein one or more cuts are formed in the product contact portion to release the force acting on the product contact portion.

7. A storage box unfolding sheet having one rectangular bottom plate portion, four side wall portions extending along four sides of the bottom plate portion, and two buffer material portions extending along end sides opposite to the bottom plate portion of two opposite side wall portions among the four side wall portions, a box body formed by bending the one bottom plate portion and the four side wall portions, and a buffer material formed by bending the two buffer material portions. The buffer material portion has a bending line parallel to the end side, a product contact portion and a leg portion adjacent to each other with the bending line therebetween. The leg portion is bent toward the product contact portion side along the bending line so as to be positioned between the product contact portion and the bottom plate portion. The storage box, wherein the bending line is a curve or a broken line convex from the product contact portion side toward the leg portion side. **Claim 8** A storage box unfolding sheet having one rectangular bottom plate portion, four side wall portions extending along four sides of the bottom plate portion, and two buffer material portions extending along end sides opposite to the bottom plate portion of two opposite side wall portions among the four side wall portions. The buffer material portion has a bending line parallel to the end side, a product contact portion and a leg portion adjacent to each other with the bending line therebetween. The bending line is a curve or a broken line convex from the product contact portion side toward the leg portion side, and the storage box unfolding sheet is configured such that when the leg portion is bent along the bending line, the leg portion can be positioned between the product contact portion and the bottom plate portion.

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