Storage box and development sheet

Abstract

To provide a storage box capable of preventing displacement of a commodity without using a bubble cushioning material made of a synthetic film.SOLUTION: A storage box 10 according to the present invention includes a rectangular paper-made box body 100, and a mount 130 disposed inside the box body 100 and having a contact portion 131 formed by bending a side 130A of a single developed sheet for a shock-absorbing material along a bending line 138, and a leg portion 132 adjacent to the contact portion 131 across the bending line 138, wherein the bending portion 138 is a curved line or a folded line that is convex from a commodity contact portion side toward a leg portion side.SELECTED DRAWING: Figure 8

Description

[Technical Field]

[0001] The present invention relates to a storage box, a cushioning material to be placed inside the storage box, and an unfoldable sheet. [Background technology]

[0002] In cosmetic boxes used for packaging products, backing boards are used to arrange the products housed in the cosmetic box in an attractive manner and to prevent the products from shifting position even if the box is subjected to a slight impact. A backing board is usually formed by folding a single piece of cardboard, and has a product placement section where the product is placed and a pair of legs. Some backing boards have partitions that define the area where the product is placed, as well as cutouts and openings that define the position of the product.

[0003] The backing is placed inside the cosmetic box with the legs facing downwards and the product placement section facing upwards, and the product is placed on the product placement section. The legs position the product placement section slightly above the bottom of the cosmetic box (raising the bottom), which also has the effect of making the products placed on the product placement section easier to see from the outside and to take out.

[0004] Furthermore, by using a backing, it is possible to prevent the arrangement of the products contained in the cosmetic box from becoming distorted, for example, when a purchaser carries the cosmetic box in a carrier bag or the like. On the other hand, when the product is transported in a vehicle or the like, even if a backing is used, the products contained in the cosmetic box may shift and become distorted due to the impact received during transportation. If there is a gap between the product and the cosmetic box, not only may the product shift within the cosmetic box, but the product may also be damaged. Therefore, bubble wrap is placed between the cosmetic box and the product to prevent the product from shifting even when subjected to impact. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Utility Model Application Publication No. 07-031615 Summary of the Invention [Problem to be solved by the invention]

[0006] One type of cushioning material used in cosmetic boxes is bubble cushioning (Patent Document 1). Bubble cushioning has numerous air bubbles sealed between two sheets of synthetic resin film, providing excellent cushioning and being lightweight, making it widely used as a cushioning material for a variety of products. However, while cosmetic boxes and backing boards are made from paper, bubble cushioning is made from synthetic resin film, so it must be separated from the cosmetic box and backing board when disposed of. Furthermore, in light of the microplastics issue, the use of bubble cushioning made from synthetic resin film is being reconsidered.

[0007] Although the cosmetic box has been used as an example in the description above, the same problem exists not only in cosmetic boxes but also in various types of storage boxes for storing items inside, such as packing boxes and wrapping boxes.

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

[0009] The storage box according to the present invention, which has been made to solve the above problems, comprises: A rectangular box body, a cushioning material disposed inside the box body, the cushioning material having a contact portion formed by folding a single unfolded cushioning sheet along a fold line, and leg portions adjacent to the contact portion across the fold line; Equipped with The bent portion is characterized in that it is a curve or a bent line that is convex from the contact portion side toward the leg portion side.

[0010] In the storage box of the above configuration, when the box body is a box body in which products are stored, the cushioning material is placed on the bottom surface of the box body with the legs facing downward and the product contact portion facing upward. An item is then placed on the contact portion of the cushioning material placed on the box body. In other words, in this case, the cushioning material functions as a backing. On the other hand, when the box body is a lid, the cushioning material is placed on the top surface of the inside of the lid with the legs facing upward and the contact portion facing downward. Therefore, when the lid with the cushioning material placed on the top surface is placed over the box body, the contact portion of the cushioning material will contact the top of the item stored in the box body.

[0011] The cushioning material is formed by folding a single unfoldable cushioning sheet along a fold line to form a contact portion and a leg portion adjacent to the contact portion across the fold line. In the unfoldable cushioning sheet, the fold portion is a curve or fold line that convexly extends from the contact portion toward the leg portion. Therefore, when the unfoldable cushioning sheet is folded along the fold line to form the contact portion and the leg portion, the leg portion curves downward to form a convex shape. When the backing sheet is placed inside a box with the leg portion facing downward, an upward force acts on the contact portion due to a force (restoring force) that attempts to restore the leg portion and the contact portion to a continuous plane. Furthermore, the elasticity (springiness) of the leg portion due to this restoring force allows impact mitigation and shock absorption for the product when placed on the contact portion, even without a cushioning material such as bubble wrap.

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

[0013] In the above configuration, it is preferable that the cushioning material has one abutment portion and two leg portions formed by folding the cushioning material unfolding sheet along two fold lines provided at a predetermined distance on the cushioning material unfolding sheet.

[0014] By having two legs, the restoring force acting between the legs and the abutment part is increased, thereby making it possible to achieve greater shock mitigation and shock absorption effects when an item is placed on the abutment part.

[0015] In the unfolded sheet for cushioning material, it is also preferable that the fold line is an arc curve configured so that the distance between the fold line and a straight line connecting both ends of the fold line gradually increases from both ends of the straight line toward the center.

[0016] In this case, when the thickness of the expanded sheet for 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, the portion between the leg portion and the abutting portion can be smoothly bent, so that the cushioning material has a good appearance.

[0018] In the above-mentioned storage box, it is preferable that either a locking piece that regulates the up and down movement of the abutment portion within 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 or the cushioning material.

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

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

[0021] The storage box having the above configuration comprises a storage box body formed by folding one bottom plate portion and the four side wall portions of a single unfoldable sheet for a storage box, the storage box having one rectangular bottom plate portion, four side wall portions extending from the four sides of the bottom plate portion, and two cushioning material portions extending from the end sides of two opposing side wall portions of the four side wall portions on the side opposite to the bottom plate portion, and a cushioning material formed by folding the two cushioning material portions, the cushioning material portion has a fold line parallel to the end side, and an abutment portion and a leg portion adjacent to each other across the fold line, The fold line may be a curve or fold line that is convex from the contact portion side toward the leg portion side.

[0022] Another aspect of the present invention that has been made to solve the above problems is: A cushioning material to be placed inside a rectangular box, the cushioning material having a contact portion formed by folding a single unfolded cushioning sheet along a folding line, and leg portions adjacent to the contact portion across the folding line, The bent portion is characterized in that it is a curve or a bent line that is convex from the contact portion side toward the leg portion side.

[0023] Another aspect of the present invention that has been made to solve the above problems is: A deployment sheet for a storage box having one rectangular bottom plate portion, four side wall portions extending from four sides of the bottom plate portion, and two cushioning material portions extending from the end sides of two opposing side wall portions of the four side wall portions on the side opposite to the bottom plate portion, the cushioning material portion has a fold line parallel to the end side, and an abutment portion and a leg portion adjacent to each other across the fold line, The folding line is a curve or folding line that is convex from the contact portion side toward the leg portion side. [Effects of the Invention]

[0024] According to the present invention, it is possible to prevent products stored in a storage box from shifting out of position without using bubble cushioning material. [Brief explanation of the drawings]

[0025] [Figure 1] 1 is a perspective view of a cosmetic case according to a first embodiment of the present invention. [Figure 2] FIG. 2 is a perspective view of the cosmetic box with the lid removed from the box body. [Figure 3] FIG. [Figure 4] FIG. [Figure 5] FIG. [Figure 6] FIG. 2(a) is an enlarged view showing the vicinity of a locking piece 114 of the box body, and FIG. 2(b) is an enlarged view showing the vicinity of the insertion opening of the box body. [Figure 7] Plan view of the deployed sheet of the partition member [Figure 8] FIG. 10 is a plan view of the unfolded sheet of the mount 130. [Figure 9] FIG. 10 is a plan view of the unfolded sheet of the mount 140. [Figure 10] A schematic diagram showing the inside of the gift box. [Figure 11] FIG. 10 is a perspective view of a lid of a cosmetic box according to a second embodiment of the present invention. [Figure 12] FIG. [Figure 13] FIG. 10 is a plan view of an expanded sheet of cushioning material placed on the lid. [Figure 14] FIG. 10 is a perspective view of a lid of a cosmetic box according to a third embodiment of the present invention. [Figure 15] Plan view of the lid and cushioning sheet unfolded. [Figure 16] FIG. 10 is a perspective view showing a mount according to a modified example of the present invention. [Figure 17] FIG. 10 is a perspective view showing a mount according to another modified example of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0026] Hereinafter, specific embodiments of the present invention will be described. In all of the embodiments described below, the storage box according to the present invention is applied to a cosmetic box. A cosmetic box generally refers to a decorated paper box used when giving a gift, and has the function of protecting the product stored therein. However, the present invention can also be applied to storage boxes other than cosmetic boxes, such as packaging boxes or wrapping boxes, which have the function of protecting the product stored therein. [Example]

[0027] Fig. 1 is a perspective view of a cosmetic box according to Example 1, and Fig. 2 is a perspective view of the cosmetic box with the lid removed. For ease of explanation, the decorations on the cosmetic box are not shown. The cosmetic box 10 according to this example is a slightly flattened cubic box with a lid, and includes a box body 110, a lid 120, and two backing sheets 130 and 140 arranged inside the box body 110. The box body 110 corresponds to the box body of the present invention, and the backing sheets 130 and 140 correspond to the cushioning material of the present invention.

[0028] A partition member 111 is disposed inside the box body 110 to divide the interior. As shown in Fig. 3, the partition member 111 has a partition plate 112 and a pair of legs 113. The partition member 111 divides the interior of the box body 110 into two sections, forming two storage sections 1101 and 1102 of approximately the same shape. The lid 120 is slightly larger than the box body 110, and when the lid 120 is placed on the box body 110, almost the entire box body 110 is covered by the lid 120.

[0029] 4 and 5 are perspective views of the backing sheets 130 and 140. The backing sheet 130 includes a rectangular product placement section 131, two legs 132, 132 connected to both widthwise sides of the product placement section 131, and an inclined section 133 connected to one longitudinal end of the product placement section 131. A locking piece 134 is formed in the center of the other longitudinal end of the product placement section 131. The backing sheet 140 has substantially the same configuration as the backing sheet 130, and includes a product placement section 141, two legs 142, 142, an inclined section 143, and an locking piece 144. The product placement section 141 of the backing sheet 140 is formed with a plurality of raised incisions 145 that determine the position of the products, which is a difference from the backing sheet 130. The product placement sections 131 and 141 of the backing sheets 130 and 140 correspond to the abutment sections of the present invention.

[0030] As shown in Fig. 6(a), a locking piece 1103 that protrudes inward of the storage sections 1101, 1102 is formed in the center of the upper edge of one longitudinal end of the storage sections 1101, 1102 of the box body 110. In addition, as shown in Fig. 6(b), an insertion opening 1104 is formed in the center of the lower part of the other longitudinal end of the storage sections 1101, 1102 of the box body 110. The insertion opening 1104 is located slightly above the bottom surfaces of the storage sections 1101, 1102.

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

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

[0033] 7 is a plan view of the unfolded sheet 111A of the partition member 111. The unfolded sheet 111A has a rectangular partition portion 112A and two narrow rectangular leg portions 113A that are slightly longer than the partition portion 112A and extend from two opposing sides of the partition portion 112A. The arrows shown inside the unfolded sheet 111A represent the grain of the paper (note that in the following description, arrows in the unfolded sheet represent the grain). Similarly, a mountain fold line 114 is formed in the center of the width of the partition portion 112A, and valley fold lines 115 are formed at the boundaries between the partition portion 112A and the two leg portions 113A. The partition member 111 is formed by folding along the mountain fold line 114 and the valley fold line 115.

[0034] 8 is a plan view of the unfolded sheet 130A of the backing sheet 130. The unfolded sheet 130A has a product placement portion 131A, which corresponds to the product placement portion 131, two leg portions 132, 132, inclined portion 133, and locking piece portion 134 of the backing sheet 130, a leg portion 132A, an inclined portion 133A, and a locking piece portion 134A. Mountain fold lines 138, 138 are formed at the boundary between the product placement portion 131A and the leg portion 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 fold lines of the present invention.

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

[0036] The mountain fold line 138 is a curve that is slightly convex from the product placement section 131 side toward the leg section 132 side, and in this embodiment in particular, 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 an arc curve that gradually increases from both ends of the straight line L0 toward the center. Therefore, when the product placement section 131 and the leg sections 132 are formed by folding along the mountain fold line 138, the leg sections 132 are slightly curved so as to be convex downward. When the backing board 130 is stored inside the box body 110 (storage section 1101) with such legs 132 facing downward, the leg sections 132 and the product placement section 131 are restored to a continuous plane by a force (restoring force) that restores them to a continuous plane. An upward force acts on the product placement section 131. Moreover, because the mountain fold line 138 is nearly perpendicular to the grain, the restoring force is even greater. Furthermore, the elasticity (springiness) of the legs 132 due to this restoring force provides an impact mitigation and shock absorption effect for the products placed on the product placement section 131.

[0037] Similarly to mountain fold line 138, when a straight line connecting both ends of mountain fold line 148 is defined as L0, mountain fold line 148 is formed as an arc curve such that the distance between straight line L0 and mountain fold line 148 gradually increases from both ends of straight line L0 toward the center. Therefore, similar to product placement section 131 of mount 130, product placement section 141 of mount 140 also provides an impact reduction and shock absorption effect on the products placed thereon.

[0038] Here, the maximum distance between the straight line L0 and the mountain fold lines 138, 148 (i.e., the distance between the mountain fold lines 138, 148 at the center of the straight line L0) can be set appropriately depending on conditions such as the length of the straight line L0, the thickness of the unfolded sheets 130A, 140A, the area of ​​the product placement sections 131, 141, and the elasticity of the unfolded sheets 130A, 140A. For example, when the thickness of the unfolded sheets 130A, 140A is 0.5 mm and the length of the straight line L0 is 160 mm, the maximum distance should be set to 0.032 to 0.32 mm. By setting the value within this range, the product can be folded smoothly at the mountain fold lines 138, 148, and can also achieve impact reduction and shock absorption for products placed on the product placement sections 131, 141.

[0039] FIG. 10 shows the state in which the backing board 130 configured as described above is accommodated in the storage section 1101 of the box body 110, the product 100 is placed on the product placement section 131, and the lid 120 is then placed on top of it. With the lid 120 in place, the product 100 abuts against the underside of the lid 120, and a force pushing up on the lid 120 from below acts on the lid 120, with the product placement section 131 being pushed downward by the reaction force. In this state, the restoring force of the legs 132 applies an upward force (indicated by the white arrow 21) to the product placement section 131, preventing the product 100 placed on the product placement section 131 from moving. Furthermore, the elasticity (springiness) of the legs 132, 132 provides shock mitigation and shock absorption. Therefore, even without using cushioning material such as bubble wrap, the product 100 can be prevented from moving and being damaged within the storage section 1101 when the cosmetic box 10 is transported. The same applies to the products stored in the storage section 1102. [Example]

[0040] Like Example 1, Example 2 is an example in which the storage box according to the present invention is applied to a cosmetic box, but the cosmetic box of Example 2 differs from the cosmetic box of Example 1 in that cushioning materials are provided on both the box body and the lid. In other words, in this example, the box body and the lid correspond to the box body of the present invention. The configuration of the box body is the same as in Example 1, so illustrations and explanations are omitted.

[0041] FIG. 11 is a perspective view of the lid 220 of the cosmetic box according to Example 2. As shown in FIG. 11, one cushioning material 230 is disposed inside the lid 220. The cushioning material 230 has a rectangular abutment portion 231 that is substantially the same as the bottom plate portion of the lid 220, and a pair of legs extending from two opposing sides of the abutment portion 231. In FIG. 11, the legs are hidden by the abutment portion 231 and cannot be seen. The abutment portion 231 has four arc-shaped cuts 232 formed at an angle of approximately 90°. The cuts 232 are arranged radially from the center of the abutment portion 231 so that the convex sides face each other.

[0042] 12 is a plan view of the unfolded sheet 220A of the lid 220. The unfolded sheet 220A of the lid 220 has a rectangular bottom plate portion 221A that corresponds to the bottom plate of the lid 220 and side wall portions 222A that correspond to the four side wall portions 222 of the lid 220. The side wall portions 222A have, in order from the bottom plate portion 221A side, an outer wall portion 223A, an inner wall portion 224A, and a flange portion 225A. Furthermore, a fold margin 226 is provided between each pair of adjacent outer wall portions 223A, and insertion pieces 227 are provided on both sides of the inner wall portions 224A that constitute the two opposing side wall portions 222A. Furthermore, engagement holes 228 consisting of cutout holes are formed at the boundaries between the inner wall portions 224A and the flange portions 225A of each of the four side wall portions 222A.

[0043] 12, the fine and coarse dashed lines indicate mountain folds and valley folds, respectively, when viewed from the inside of the lid 220. The solid lines indicate cut lines. The lid 220 is formed by mountain-folding and valley-folding the unfolded sheet 220A along the mountain folds and valley folds.

[0044] 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 leg portions, which extend from two opposing sides of the contact portion 231A. A mountain fold line 234 is provided at the boundary between the contact portion 231A and the leg portions 233A, and a locking piece 235 made of a cut-and-raised piece is formed in the center of the mountain fold line. In addition, locking pieces 236 are formed on two of the four sides of the contact portion 231A from which the leg portions 233A do not extend. The four cuts 232 described above are formed in the contact portion 231A.

[0045] The unfolded sheet 230A is folded along the mountain fold lines 234 to form the cushioning material 230, which has one contact portion 231, two legs, and locking pieces 235 or 236 on the four sides of the contact portion 231.

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

[0047] When such a lid 220 is placed on the box body 110 (see Example 1), the abutting portion 231 of the cushioning material 230 abuts on the product contained in the box body 110, and the elasticity (springiness) of the cut pieces 2321 provides an impact mitigating and shock absorbing effect on the product. The product placement portions 131, 141 of the backing sheets 130, 140 arranged on the box body 110 also provide an impact mitigating and shock absorbing effect on the product. In other words, in this example, an impact mitigating and shock absorbing effect acts on the product from above and below, thereby further protecting the product. [Example]

[0048] In Example 3, similar to Example 2, the storage box according to the present invention is applied to a cosmetic box, and cushioning materials are provided on both the box body and the lid. Therefore, in this example, the box body and the lid also correspond to the box body of the present invention. Since the configuration of the box body is the same as in Example 1, illustrations and explanations will be omitted, and the configuration of the lid will be explained.

[0049] Fig. 14 is a perspective view of the lid 320 of Example 3. 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 is formed by dividing the bottom plate of the lid 320 into two equal parts, and one leg extending from one long side of the contact portion 331, 341. Note that in Fig. 14, the leg is hidden by the contact portion 331, 341 and cannot be seen.

[0050] Abutment portion 331 has one U-shaped cut 332 formed in the longitudinal direction of contact portion 331, and abutment portion 341 has one arc-shaped cut 342 formed along the longitudinal direction of contact portion 341. Cushioning materials 330, 340 are arranged inside lid 320 so that the concave sides of cuts 332, 342 face each other.

[0051] This embodiment is characterized in that the lid 320 and the cushioning materials 330, 340 are integrally formed. Specifically, the lid 320 and the cushioning materials 330, 340 are formed by folding a single unfolded sheet 350 made of cardboard as shown in FIG. 15. Therefore, the unfolded sheet 350 has a lid portion 320A corresponding to the lid 320, a cushioning material portion 330A corresponding to the cushioning material 330, and a cushioning material portion 340A corresponding to the cushioning material 340. The shape of the lid portion 320A is substantially the same as the shape of the unfolded sheet 220A of the second embodiment, and has a bottom plate portion 321A and side wall portions 322A corresponding to the four side wall portions 322 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. Meanwhile, of the four side wall portions 222A, the remaining two opposing side wall portions 322A have, in order from the bottom plate portion 321A side, an outer wall portion 323A and an inner wall portion 324A. A fold margin 326 is provided between each pair of adjacent outer wall portions 323A of the four side wall portions 322A. Furthermore, 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 engagement holes 328 formed as cutout holes 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] Cushioning material portions 330A, 340A extend from the end edges of inner wall portions 324A of two side wall portions 322A that do not have flange portions 325A. Cushioning material portion 330A has abutting portion 331A corresponding to abutting portion 331 and leg portions 333A corresponding to the legs. On the other hand, cushioning material portion 340A has abutting portion 341A corresponding to abutting portion 341 and leg portions 343A corresponding to the legs. Locking pieces 336, 346 that engage with engagement holes 328 are formed on both sides of abutting portions 331A, 341A near leg portions 333A, 343A. In addition, cuts 332, 342 are formed in abutting portions 331A, 341A, respectively.

[0054] 15, the fine and coarse dashed lines indicate mountain folds and valley folds, respectively, when viewed from the inside of lid 320. Solid lines indicate perforation lines. By mountain-folding and valley-folding unfolded sheet 350 along the mountain folds and valley folds, and inserting locking pieces 336 and 346 into engagement holes 328, lid 320 and cushioning materials 330 and 340 are integrally formed.

[0055] In this case, valley fold line 335 at the boundary between abutment portion 331A and leg portion 333A of cushioning material portion 330A is formed as an arc curve that is slightly convex from the abutment portion 331A side toward the leg portion 333A side, similar to mountain fold line 234 in Example 2. Valley fold line 345 at the boundary between abutment portion 341A and leg portion 343A of cushioning material portion 340A is formed as an arc curve that is slightly convex from the abutment portion 341A side toward the leg portion 343A side, similar to mountain fold line 234 in Example 2. Specifically, a straight line (not shown) connecting both ends of valley fold lines 335, 345 is formed as an arc curve in which the distance between the valley fold lines 335, 345 and the straight line gradually increases from both ends of the straight line toward the center. Therefore, when cushioning material 330 having abutment portion 331 and leg portions is formed by folding along valley fold line 335, the leg portions are slightly curved downward to be convex. Similarly, when the cushioning material 340 having the contact portion 341 and the leg portions is formed by folding along the valley fold line 345, the leg portions are slightly curved so as to be convex downward.

[0056] As a result, in cushioning material 330, a force (restoring force) that tries to restore the legs and abutting portions 331 to a continuous plane acts on abutting portions 331, and an upward force acts on abutting portions 331. Also, in cushioning material 340, a force (restoring force) that tries to restore the legs and abutting portions 341 to a continuous plane acts on abutting portions 341. At this time, because cuts 332, 342 are formed in abutting portions 331, 341, part of the restoring force is released by cuts 332, 342, and the portions surrounded by cuts 332, 342 (cut pieces 3321, 3421) are separated from the other portions.

[0057] When such a lid 320 is placed on the box body 110 (see Example 1), the abutment portions 331, 341 of the cushioning materials 330, 340 abut on the products contained in the box body 110, and the elasticity (springiness) of the cut pieces 3321, 3421 provides an impact reduction and shock absorption effect on the products. The product placement portions 131, 141 of the backing sheets 130, 140 arranged on the box body 110 also provide an impact reduction and shock absorption effect on the products. In other words, in this example as well, as in Example 2, an impact reduction and shock absorption effect is exerted on the products from above and below, thereby further protecting the products from external forces.

[0058] [Variations] The present invention is not limited to the above-described embodiment, but can be modified, for example, as follows.

[0059] Instead of the mounts 130 and 140 described in the first embodiment, mounts 400 and 500 having shapes as shown in Fig. 16 and Fig. 17 can be used. The mount 400 has a product placement section 431, two legs 432, and a V-shaped inclined section 401. The mount 400 differs from the mount 130 in the shape of the inclined section 401 and in the absence of a locking piece.

[0060] Furthermore, mount 500 differs from mount 130 in that mount 500 consists only of product placement section 531 and two legs 532, and does not have an inclined section or a locking piece. Of course, mounts 400 and 500 may be provided with cut-outs 145 like mount 140.

[0061] In addition to being placed inside the lid, the cushioning material 230 of Example 2 may also be placed inside the box body. In this case, the cushioning material 230 functions as a backing. In addition, in the cosmetic boxes of Examples 2 and 3, cushioning material (backing) is placed on both the lid and the box body, but the cushioning material (backing) on ​​the box body may be omitted. Furthermore, when the box body (box body and lid) and the cushioning material are separate, the box body is not limited to being made of paper, but can be made of various materials such as wood, metal, plastic, etc. [Explanation of symbols]

[0062] 10...Gift box 110...Box body 120, 220, 320…lid 130, 140, 400, 500... Mount 130A, 140A, 230A...Expanding sheet (expanding sheet for cushioning) 131, 141...Product placement section (contact section) 132, 142...legs 230, 330, 340…Buffer material 231, 331, 341...Contact part 350...Expansion sheet (expansion sheet for storage box) 138, 148...Mountain fold line (fold line) 335, 345... Valley fold line (fold line)

Claims

1. A rectangular box body, a cushioning material disposed inside the box, the cushioning material having a product contact portion formed by folding a single unfolded cushioning sheet along a fold line, and leg portions adjacent to the product contact portion across the fold line; Equipped with The storage box, wherein the bent portion is a curve or a fold line that is convex from the product contact portion side toward the leg portion side.

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

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

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

5. 2. A storage box as described in claim 1, wherein either a locking piece that regulates the up and down movement of the product abutment portion within 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 or the cushioning material.

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

7. The box is formed by folding a single unfoldable sheet for a box, 2. The storage box according to claim 1, wherein the expansion sheet for the cushioning material is formed integrally with the expansion sheet for the box body.

8. a box body formed by folding one bottom plate portion and four side wall portions of a single unfoldable sheet for a storage box, the box having one rectangular bottom plate portion, four side wall portions extending from four sides of the bottom plate portion, and two cushioning material portions extending from end sides of two opposing side wall portions of the four side wall portions on the side opposite to the bottom plate portion; and a cushioning material formed by folding the two cushioning material portions, the cushioning material portion has a fold line parallel to the end side, and an abutment portion and a leg portion adjacent to each other across the fold line, 2. The storage box according to claim 1, wherein the fold line is a curve or fold line that is convex from the contact portion side toward the leg portion side.

9. A cushioning material to be placed inside a rectangular box, the cushioning material having a contact portion formed by folding a single unfolded cushioning sheet along a fold line, and leg portions adjacent to the contact portion across the fold line, The cushioning material, wherein the bent portion is a curve or a folded line that is convex from the contact portion side toward the leg portion side.

10. 10. The cushioning material according to claim 9, wherein the unfolded sheet for cushioning material has two fold lines at a predetermined interval, and the unfolded sheet for cushioning material has one abutment portion and two leg portions formed by folding the unfolded sheet for cushioning material at the two fold lines.

11. 10. The cushioning material according to claim 9, wherein in the unfolded sheet for cushioning material, the fold line is an arc curve configured so that the distance between the fold line and a straight line connecting both ends of the fold line gradually increases from both ends of the straight line toward the center.

12. 12. The cushioning material according to claim 11, wherein when the thickness of the unfolded sheet for cushioning material is 0.1 mm to 1.0 mm, the ratio of the maximum value of the distance to the length of the straight line is 1 / 5000 to 1 / 500.

13. 10. The cushioning material according to claim 9, wherein one or more cuts are formed in the contact portion to allow a force acting on the contact portion to be released.

14. A deployment sheet for a storage box having one rectangular bottom plate portion, four side wall portions extending from four sides of the bottom plate portion, and two cushioning material portions extending from the end sides of two opposing side wall portions of the four side wall portions on the side opposite to the bottom plate portion, the cushioning material portion has a fold line parallel to the end side, and an abutment portion and a leg portion adjacent to each other across the fold line, The unfoldable sheet for a storage box, wherein the fold line is a curve or fold line that is convex from the contact portion side toward the leg portion side.

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