Wound body storage box

Abstract

To provide a wound body storage box capable of suppressing cracking of a ridge line when being folded while securing water resistance and fitting feeling.SOLUTION: A wound body storage box 10 comprises a storage part 20 and a lid part 21. A ridge line A is provided between a rear plate 32 and a lid plate 40, and the ridge line A contains a first line A1 shifting from a virtual straight line B linearly connecting both ends of the ridge line A to the rear plate 32 side and the lid plate 40 side. The rear plate 32 and the lid plate 40 include a first coating area 70, which contains the first line A1 and is provided along the first line A1 and whose arithmetic average height Sa is less than 3 μm, and a second coating area 71, which is adjacent to the first coating area 70 and is provided away from the first line A1 and whose arithmetic average height Sa is 3 μm or more. The first coating area 70 and the second coating area 71 have boundary lines C1 of a shape along the first line A1.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present application relates to a wound body housing box. [Background technology]

[0002] Films such as wraps and foils are wound into a roll around a long cylindrical core (a roll), and then stored in a long, rectangular parallelepiped roll storage box.

[0003] The wound body storage box has a storage section that can store the wound body and has an open top, and a lid section that opens and closes the opening on the top of the storage section. The storage section is composed of a front plate, a bottom plate, a rear plate, and side plates, etc., and the lid section is composed of a lid plate that covers the opening on the top of the storage section, a cover piece that extends from the lid plate toward the front plate, and a cutting blade provided at the tip of the cover piece, etc. (see Patent Documents 1 and 2). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2015-182816 A [Patent Document 2] JP 2022-170454 A Summary of the Invention [Problem to be solved by the invention]

[0005] Incidentally, since the wound body storage box is also used in kitchens, etc., it is preferable that the box has water resistance. In order to increase the water resistance, it is preferable that a coating layer is formed on the surface of the wound body storage box.

[0006] In addition, the wound body storage box preferably has a shape that fits in the palm of a user's hand to improve ease of handling. In particular, since the ridge line connecting two adjacent plate surfaces of the wound body storage box is a part that is likely to be touched by the user's hand, it is preferable to provide a special shape.

[0007] However, the wound body housing box is assembled by folding along the ridges. At this time, there is a possibility that the coating layer or its base may crack along the ridges of the wound body housing box. In particular, when the ridges are shaped in a special way, bending can easily cause cracks.

[0008] The present invention has been made in consideration of the above points, and its object is to provide a roll storage box that can suppress cracks in the ridges when bent while ensuring water resistance and a good fit. [Means for solving the problem]

[0009] As a result of intensive research, the inventors have found that the above-mentioned problems can be solved by a ridgeline including a first line that is shifted from a virtual straight line connecting both ends of the ridgeline toward at least one of the first plate surface side or the second plate surface side, and the first plate surface and the second plate surface have a first coating region that is provided along the first line and has an arithmetic mean height Sa of less than 3 μm, and a second coating region that is adjacent to the first coating region, is provided at a distance from the first line, and has an arithmetic mean height Sa of 3 μm or more, and have thus completed the present invention. That is, the aspects of the present invention include the following.

[0010] (1) A roll storage box comprising: a storage section capable of storing a roll around which a film is wound, the storage section including a front plate, a bottom plate, a rear plate, and side plates, and an open top surface; and a lid section capable of opening and closing the opening on the top surface of the storage section, the lid section including a lid plate and a cover piece, wherein a ridge line is provided between a first plate surface and a second plate surface adjacent to each other and selected from the group consisting of the front plate, the bottom plate, the rear plate, the side plates, the lid plate, and the cover piece, and the ridge line is located at a position on the first plate surface side or the second plate surface side from a virtual straight line connecting both ends of the ridge line. a first line shifted to at least one side of a second plate surface side, the first plate surface and the second plate surface including the first line, a first coating region provided along the first line and having an arithmetic mean height Sa of less than 3 μm, and a second coating region adjacent to the first coating region and spaced apart from the first line and having an arithmetic mean height Sa of 3 μm or more, the first coating region and the second coating region having a boundary line shaped along the first line; Rolled body storage box. (2) The wound body housing box according to (1), wherein the first line is a curved line and the boundary line is a curved line. (3) the second coating region has a constant width; A roll-containing box according to (1) or (2). (4) The roll storage box according to any one of (1) to (3), wherein the ridge line includes a second line connected to the first line, and the first plate surface and the second plate surface include the second line, and the roll storage box has a third coating region that is provided along the second line and has an arithmetic mean height Sa of less than 3 μm, and a fourth coating region that is adjacent to the third coating region and spaced apart from the second line, and has an arithmetic mean height Sa of 3 μm or more. (5) The wound body storage box according to (4), wherein the third coating area and the fourth coating area have a boundary line shaped along the second line. (6) The wound body storage box according to (4) or (5), wherein the second line is a straight line or a curved line. (7) A wound body storage box according to any one of (4) to (6), wherein the third coating region has a constant width. (8) The wound body housing box according to any one of (4) to (7), wherein the second wire is connected to the first wire. (9) A wound body storage box according to any one of (4) to (8), wherein the third coating area and the first coating area are continuous. (10) A wound body storage box according to any one of (4) to (9), wherein the width of the first coating area is greater than the width of the third coating area. (11) A wound body storage box according to any one of (4) to (10), wherein the second coating area and the fourth coating area are continuous. (12) A wound body housing box according to any one of (1) to (11), wherein the second coating region is spaced from the ridge line by 2 mm or more. (13) A wound body housing box according to any one of (1) to (12), wherein the second coating region is spaced from the imaginary straight line by 2 mm or more. (14) The second coating region has an embossed region having a concave and convex shape, and the embossed region has an Spc of 200 mm -1 More than 500mm -1 or less, and Spd is 15,000 mm -2 More than 30000mm -2 The roll storage box according to any one of (1) to (13), configured as follows: (15) A roll storage box according to any one of (1) to (14), wherein the second coating region has an embossed region with projections and recesses, and the convex portion of the embossed region has an area of ​​20% or more of the entire embossed region. Effect of the Invention

[0011] According to the present invention, it is possible to provide a wound body storage box that can suppress cracks at the ridges when bent while ensuring water resistance and a good fit. [Brief description of the drawings]

[0012] [Figure 1] FIG. 2 is a perspective view showing an example of a configuration of a wound body accommodating device. [Diagram 2] FIG. 4 is a perspective view showing the wound body accommodating device when the lid portion is open. [Diagram 3] FIG. 2 is a perspective view showing the configuration of a wound body and a wound body storage box. [Figure 4] FIG. 4 is a development view of the front side of the wound body housing box. [Diagram 5] 1 is a front view of a roll-containing box with the opening strip removed. FIG. [Figure 6] 11 is a diagram showing an example of a ridge line and a first coating region of a wound body housing box. FIG. [Figure 7] FIG. 2 is a diagram showing an example of a second coating region. [Figure 8] 13A and 13B are diagrams showing other examples of ridge lines of the wound body storage box. [Figure 9] 13A and 13B are diagrams showing other examples of ridge lines of the wound body storage box. [Figure 10] 13A and 13B are diagrams showing other examples of ridge lines of the wound body storage box. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. Note that the same elements are given the same reference numerals and duplicated explanations will be omitted.

[0014] FIG. 1 is a perspective view showing an example of the wound body accommodating device 1. FIG. 2 is a perspective view showing the wound body accommodating device 1 in an unsealed state. FIG. 3 is a perspective view showing the wound body accommodating box 10 and the wound body 11 of the wound body accommodating device 1. In this specification, the terms "upper" and "lower" in the configuration of the wound body accommodating device 1 and the wound body accommodating box 10 are based on the position shown in FIG. 1, that is, the position when the bottom plate 31 (described later) of the wound body accommodating box 10 is placed down and the cover plate 40 is placed up. In addition, the front plate 30 side of the wound body accommodating box 10 is referred to as the "front", and the rear plate 32 side is referred to as the "rear". Furthermore, the longitudinal direction (left-right direction) of the wound body accommodating box 10 is referred to as "X", the front-rear direction perpendicular to the longitudinal direction X of the wound body accommodating box 10 is referred to as "Y", and the up-down direction of the wound body accommodating box 10 is referred to as "Z".

[0015] As shown in FIGS. 1 to 3, the rolled body accommodating device 1 has a rolled body accommodating box 10 and a rolled body 11 on which a film F is wound.

[0016] The rolled body storage box 10 has, for example, an elongated rectangular parallelepiped shape as a whole. The material constituting the rolled body storage box 10 is, for example, paper such as cardboard, coated cardboard, corrugated cardboard, etc., but is not limited thereto, and paper or other materials known in the industry may be appropriately selected and used. The rolled body 11 is constituted by winding the film F around a cylindrical core 12.

[0017] 4 is a development view showing the surface of the wound body storage box 10 when the wound body storage box 10 is developed. As shown in FIGS. 3 and 4, the wound body storage box 10 has a storage section 20 that can store the wound body 11 and has an open upper surface, and a lid section 21 that opens and closes the opening on the upper surface of the storage section 20.

[0018] The storage section 20 has a front panel 30, a bottom panel 31, a rear panel 32, front panel side pieces 33, side panels 34, rear panel side pieces 35, a back panel 36, and back panel side pieces 37, etc.

[0019] In the development view shown in Fig. 4, the back panel 36, the front panel 30, the bottom panel 31 and the back panel 32 each have a rectangular shape that is long in the left-right direction X, and are connected to each other in the front-rear direction Y in this order. The front panel side pieces 33 have a square shape and are connected to both ends of the front panel 30 in the left-right direction X. The side panels 34 have a square shape and are connected to both ends of the bottom panel 31 in the left-right direction X. The back panel side pieces 35 have a square shape and are connected to both ends of the back panel 32 in the left-right direction X. The back panel side pieces 37 are connected to both ends of the back panel 36 in the left-right direction X.

[0020] The front plate 30 has a wavy cut 30a formed along both ends in the left-right direction X. A temporary fastening member Q for temporarily fastening an end of the film F is provided on the surface of the front plate 30. The back plate 36 has a cut 36a formed therein, which is connected to a connection line (fold line) between the back plate 36 and the front plate 30.

[0021] As shown in FIG. 3, the storage section 20 is formed in a rectangular parallelepiped shape with an open top. The front plate 30, the bottom plate 31, the rear plate 32, and the side plate 34 constitute five walls of the storage section 20 other than the top surface. The back plate 36 is folded back inside the front plate 30 and disposed on the back surface of the front plate 30. The upper part of the front plate 30 above the cut 30a is separated from the lower part and rises forward. The upper part of the back plate 36 above the cut 36a is separated from the lower part and rises backward. The rear plate side piece 35 is folded back inside the side plate 34 to cover the inner surface of the side plate 34. The front plate side piece 33 and the rear plate side piece 37 are folded back to the inner surface of the side plate 34 and are interposed between the rear plate side piece 35 and the side plate 34.

[0022] As shown in the development view of FIG. 4, the lid portion 21 has a lid plate 40, a cover piece 41, a lid plate side piece 42, a cover side piece 43, an opening piece 44, and the like.

[0023] The cover plate 40 and the cover piece 41 have a rectangular shape that is long in the left-right direction X, and are connected to each other in the front-rear direction Y. The cover plate 40 is connected to the upper end of the rear plate 32, and the cover piece 41 is connected to the front end of the cover plate 40. The cover plate side pieces 42 have a rectangular shape and are connected to both ends of the cover plate 40 in the left-right direction X. The cover side pieces 43 have a rectangular shape and are connected to both ends of the cover piece 41 in the left-right direction X. The opening piece 44 is formed in a belt shape and is connected to the tip of the cover piece 41 so that it can be cut off. A connection line (cutting line) P1 is formed between the cover piece 41 and the opening piece 44. The center of the cutting line P1 in the left-right direction X is curved convexly toward the opening piece 44 side, and both sides are curved convexly toward the cover piece 41 side. That is, the cutting line P1 is formed in a substantially M-shape.

[0024] The cover plate 40 extends from the upper end of the rear plate 32 toward the front plate 30 as shown in Fig. 3, and covers the upper surface of the storage section 20 and closes the opening when the lid part 21 is closed as shown in Fig. 1. The cover piece 41 extends from the front end of the cover plate 40 toward the front plate 30. The cover piece 41 has a vertical width smaller than that of the front plate 30, and is configured to cover the upper region of the front plate 30 when the lid part 21 is closed. As shown in Fig. 3, the cover side piece 43 is folded back inside the cover plate side piece 42 and covers the inner surface of the cover plate side piece 42.

[0025] 5 is a front view of the roll storage box 10 with the opening piece 44 cut away. As shown in FIG. 5, a cutting blade 50 is provided at the tip of the cover piece 41 to cut the film F pulled out from the roll 11 in the storage section 20.

[0026] The cutting blade 50 is formed, for example, in a saw blade shape. The cutting blade 50 has a thin plate shape made of, for example, metal, resin, vulcanized fiber, or the like, and is attached to the back surface of the tip of the cover piece 41. The shape of the cutting blade 50 is a conventionally known shape, such as a straight line, a V-shape, an arch shape, or the like. The cutting blade 50 may also be disposed on the ridge between the bottom plate 31 and the front plate 30.

[0027] As shown in Fig. 6, a ridge line A is provided between the rear plate 32 and the cover plate 40 of the wound body storage box 10. As shown in Fig. 4, the ridge line A includes a first line A1 that is shifted toward at least one of the rear plate 32 side or the cover plate 40 side from an imaginary straight line B that linearly connects both ends Ae of the ridge line A in the left-right direction X, and a second line A2 that is connected to both sides of the first line A1.

[0028] As shown in Figs. 4 and 6, the first line A1 has, for example, a curved shape. The first line A1 is provided at the center of the ridge line A in the left-right direction (extension direction) X. The first line A1 has a first curved portion 60 that is curved convexly toward the cover plate 40 side, and a second curved portion 61 that is connected to both ends of the first curved portion 60 and is curved convexly toward the rear plate 32 side. The first curved portion 60 is provided at the center of the first line A1. The first line A1 has a wave shape as a whole. The curve of the first line A1 includes not only a smoothly curved line, but also a line that is curved as a whole by connecting multiple straight lines with different directions.

[0029] The second line A2 has, for example, a straight line shape. The second line A2 is connected to the outer ends of the second curved portions 61 of the first line A1. The second line A2 may have a curved line shape.

[0030] The back plate 32 and the cover plate 40 located on either side of the first line A1 have a first coating area 70, a second coating area 71, a third coating area 72, and a fourth coating area 73 on their surfaces.

[0031] The first coating region 70 includes the first line A1 and is provided along the first line A1. The first coating region 70 is provided in a wavy band shape and has a constant first width D1. The first coating region 70 is provided so that its center line coincides with the first line A1. The first width D1 is preferably 4 mm or more and 20 mm or less, more preferably 6 mm or more and 15 mm or less. The arithmetic mean height Sa (ISO 25178) of the first coating region 70 is less than 3 μm, more preferably 2 μm or less. The first coating region 70 is formed, for example, by applying a first varnish having a high specular gloss. The specular gloss (JIS Z 8741) can be measured by a gloss meter VG8000 (manufactured by Nippon Denshoku Industries Co., Ltd.). The 60-degree specular gloss of the first coating region 70 is preferably 15% or more, more preferably 20% or more.

[0032] The third coating region 72 includes the second line A2 and is provided along the second line A2. The third coating region 72 is connected to both ends of the first coating region 70. The third coating region 72 is provided in a linear band shape and has a constant second width D2. The third coating region 72 is provided so that its center line coincides with the second line A2. The second width D2 is smaller than the first width D1. The second width D2 is preferably 2 mm or more and 10 mm or less, more preferably 3 mm or more and 8 mm or less. The arithmetic mean height Sa (ISO 25178) of the third coating region 72 is less than 3 μm, more preferably 2 μm or less. The third coating region 72 is formed, for example, by applying a first varnish.

[0033] The second coating region 71 is adjacent to the first coating region 70 and is spaced apart from the first line A1. The second coating region 71 is spaced apart from the ridge line A by 2 mm or more. The second coating region 71 is spaced apart from the imaginary straight line B by 2 mm or more. The second coating region 71 is provided on the rear plate 32 and the cover plate 40 on both sides of the first coating region 70. The second coating region 71 has a substantially rectangular shape on the cover plate 40 and the rear plate 32. The second coating region 71 is provided on each of the cover plate 40 and the rear plate 32 from near one end to near the other end in the front-rear direction Y. The arithmetic mean height Sa (ISO 25178) of the second coating region 71 is 3 μm or more, more preferably 4 μm or more, and even more preferably 5 μm or more.

[0034] The second coating region 71 has, for example, an embossed region 80 with projections and recesses. The second coating region 71 is formed, for example, by applying a highly water-repellent third varnish on the second varnish. For example, the second varnish has a lower gloss than the first varnish. The convex portion of the embossed region 80 of the second coating region 71 has an area of ​​20% or more of the entire embossed region. The convex portion is made of the third varnish. In the example shown in FIG. 7, for example, the light-colored region is the convex portion made of the third varnish. The area of ​​the convex portion can be calculated using a known method. For example, the height data of the embossed region 80 is binarized using the edge of the convex portion as a threshold value, and the area ratio of the convex portion in the plan view of the original data is calculated.

[0035] The embossed area 80 of the second coating area 71 has an Spc of, for example, 200 mm -1 More than 500mm -1 or less, and Spd is 15000mm -2 More than 30000mm -2 It is configured to be as follows:

[0036] Spd and Spc are surface roughness parameters that evaluate the unevenness of a surface, and can be measured using a laser microscope (manufactured by Keyence Corporation). Spd is the density (number per unit area) of points classified as mountains in a feature image created using a laser microscope. Spc is the average value of the curvature radius of the peaks of points classified as mountains in a feature image created using a laser microscope. The larger the Spc value, the smaller (sharper) the curvature of the protrusions, and the smaller the Spc value, the larger (duller) the curvature.

[0037] The arithmetic mean heights Sa, Spd and Spc were measured using a laser microscope in the following manner.

[0038] The surface roughness of the coating layer was measured using a Keyence laser microscope "VK-X1000". A sample piece was cut out from the coating layer and placed on the stage, and the objective lens was selected at 20x, laser confocal mode, measurement size "standard", measurement quality "high precision", and pitch "0.75μm" were selected, and height measurements were performed. If there were convex parts or repeating units, sample pieces were cut out so that at least 20 or more were within the measurement range, and pasted together and measured as necessary. After setting the reference plane over the entire image for the obtained height image, the arithmetic mean heights Sa, Spd, and Spc were calculated with the entire measurement area as the measurement area. A total of five measurements were performed at different measurement points, and the average of the five measurements was taken as the measurement value.

[0039] The following method was used to measure the distance from the ridgeline to the coating region layer. The first and second plate surfaces of the roll storage box were held on the same plane, and the distance in the front-back direction Y or the up-down direction Z from the center of the ruled line forming the ridgeline to the boundary line of the coating region layer was measured with a ruler. The distance from the ridgeline to the coating region layer may be 2 mm or more in part of the boundary line, and is preferably 2 mm or more over the entire boundary line.

[0040] As shown in Figures 4 and 6, the second coating region 71 may have a non-embossed region 81 in the cover plate 40 and the rear plate 32. The non-embossed region 81 is formed linearly along the front-to-rear direction Y in the cover plate 40 and the rear plate 32. A plurality of non-embossed regions 81 are arranged in the left-to-right direction X. The non-embossed region 81 is formed across both ends of the second coating region 71 in the front-to-rear direction Y in the cover plate 40 and the rear plate 32. For example, the non-embossed region 81 is formed by applying a third varnish that is different from the first varnish of the first coating region 70.

[0041] The fourth coating region 73 is adjacent to the third coating region 72 and is spaced apart from the second line A2. The fourth coating region 73 is spaced apart from the ridge line A by 2 mm or more. The fourth coating region 73 is spaced apart from the imaginary straight line B by 2 mm or more. The fourth coating region 73 is provided on the rear plate 32 and the cover plate 40 on both sides of the third coating region 72. The fourth coating region 73 has a substantially rectangular shape on the cover plate 40 and the rear plate 32. The fourth coating region 73 is provided on each of the cover plate 40 and the rear plate 32 from near one end to near the other end in the front-rear direction Y. The fourth coating region 73 is provided on each of the cover plate 40 and the rear plate 32 up to near the end in the left-right direction X. The arithmetic mean height Sa (ISO 25178) of the fourth coating region 73 is 3 μm or more, more preferably 4 μm or more, and even more preferably 5 μm or more. The fourth coating region 73 has, for example, an embossed region with projections and recesses. The fourth coating region 73 is formed, for example, by applying another varnish on top of a water-repellent varnish. The convex portion of the embossed region of the fourth coating region 73 has an area of ​​20% or more of the entire embossed region. The fourth coating region 73 has, for example, an Spc of 200 mm -1 More than 500mm -1 or less, and Spd is 15000mm -2 More than 30000mm -2 The following is the result.

[0042] A boundary line C1 between the first coating region 70 and the second coating region 71 has the same shape as the first line A1, i.e., a curved shape. A boundary line C2 between the third coating region 72 and the fourth coating region 73 has the same shape as the second line A2, i.e., a straight shape.

[0043] The second coating region 71 and the fourth coating region 73 are continuous. For example, the second coating region 71 and the fourth coating region 73 may be integrated into the same type of coating region. The combined coating region of the second coating region 71 and the fourth coating region 73 has a substantially rectangular shape on the cover plate 40 and the rear plate 32. The combined coating region of the second coating region 71 and the fourth coating region 73 is formed on each of the cover plate 40 and the rear plate 32 from near one end to near the other end in the front-rear direction Y and from near one end to near the other end in the left-right direction X.

[0044] The combined coating area of ​​the second coating area 71 and the fourth coating area 73 is provided on the cover plate 40 away from the ridge line E1 between the cover plate 40 and the cover piece 41 and the ridge line E2 between the cover plate 40 and the cover plate side piece 42. In other words, the second coating area 71 and the fourth coating area 73 are not formed near the ridge line E1 and the ridge line E2 of the cover plate 40.

[0045] The combined coating area of ​​the second coating area 71 and the fourth coating area 73 is provided on the rear plate 32 away from the ridge line E3 between the rear plate 32 and the bottom plate 31 and the ridge line E4 between the rear plate 32 and the rear plate side piece 35. In other words, the second coating area 71 and the fourth coating area 73 are not formed near the ridge line E3 and the ridge line E4 of the rear plate 32.

[0046] According to this embodiment, the ridge line A between the rear plate 32 and the cover plate 40 includes a first line A1 that is shifted from a virtual straight line B that linearly connects both ends of the ridge line A to at least one of the rear plate 32 side or the cover plate 40 side, and the rear plate 32 and the cover plate 40 include the first line A1 and have a first coating region 70 that is arranged along the first line A1 and has an arithmetic mean height Sa of less than 3 μm, and a second coating region 71 that is adjacent to the first coating region 70 and spaced apart from the first line A1 and has an arithmetic mean height Sa of 3 μm or more, and the first coating region 70 and the second coating region 71 have a boundary line C1 shaped along the first line A1. In this way, by forming the first line A1 so as to deviate from the virtual straight line B and forming the first coating region 70 having an arithmetic mean height Sa of less than 3 μm in the region including the first line A1, the stress applied to the ridgeline A during folding can be dispersed and reduced, and as a result, cracking of the ridgeline A during folding can be suppressed. In addition, the shape of the ridgeline A improves the fit between the palm of the user and the wound body storage box 10. Furthermore, by forming the second coating region 71 having an arithmetic mean height Sa of 3 μm or more in the region away from the first line A1, the water resistance of the wound body storage box 10 can be ensured. Therefore, while ensuring the water resistance and fit of the wound body storage box 10, cracking of the ridgeline during folding can be suppressed. The first coating region 70 and the second coating region 71 may have a boundary line C1 shaped along the first line A1 in part. In addition to the boundary line C1, the first coating region 70 and the second coating region 71 may have a boundary line that does not follow the first line A1.

[0047] Since the first line A1 is a curve and the boundary line C1 is also a curve, it is possible to effectively prevent cracks from occurring at the ridge line A when the roll is bent. In addition, the fit between the palm of the user's hand and the roll housing box 10 is improved.

[0048] Since the second coating region 71 has a constant first width D1, cracks at the ridge line A can be appropriately suppressed.

[0049] The ridge line A includes a second line A2 connected to the first line A1, and the rear plate 32 and the cover plate 40 include the second line A2, and have a third coating region 72 that is provided along the second line A2 and has an arithmetic mean height Sa of less than 3 μm, and a fourth coating region 73 that is adjacent to the third coating region 72 and spaced apart from the second line A2 and has an arithmetic mean height Sa of 3 μm or more. This makes it possible to appropriately suppress cracks during bending even along the second line A2 of the ridge line A. In addition, the water resistance of the wound body housing box 10 can be ensured in the region spaced apart from the second line A2.

[0050] Since the third coating region 72 and the fourth coating region 73 have a boundary line C2 shaped along the second line A2, it is possible to effectively suppress cracks along the second line A2 when the sheet is bent.

[0051] Since the second line A2 is a straight line or a curved line, and the third coating region 72 has a constant second width D2, cracks at the second ridge line A2 when folded can be appropriately suppressed.

[0052] The second line A2 is connected to the first line A1, and the third coating region 72 is continuous with the first coating region 70. Furthermore, the width D1 of the first coating region 70 is greater than the width D2 of the third coating region 72. This makes it possible to effectively suppress cracks near the center of the ridge line A.

[0053] Since the second coating region 71 is spaced from the edge line A by 2 mm or more, cracks at the edge line A during bending can be more reliably prevented.

[0054] Since the second coating region 71 is spaced 2 mm or more from the imaginary line B, cracks on the ridge line A and the imaginary line B during bending can be more reliably suppressed.

[0055] The embossed area 80 of the second coating area 71 has an Spc of 200 mm -1 More than 500mm -1or less, and Spd is 15000mm -2 More than 30000mm -2 Since the second coating region 71 is configured as follows, the water resistance of the second coating region 71 can be improved.

[0056] The second coating region 71 has an embossed region 80 with projections and recesses, and the projections of the embossed region 80 occupy an area of ​​20% or more of the entire embossed region 80. This makes it possible to improve the water resistance of the second coating region 71.

[0057] In the above embodiments, the ridge line A may have other shapes. For example, the ridge line A may have other curved shapes other than curved. The ridge line A may also have a polygonal shape as shown in FIG. 8. The ridge line A may also have an elliptical shape as shown in FIG. 9. The ridge line A may also have discontinuous lines as shown in FIG. 10.

[0058] In the above embodiment, the ridge line A on which the first coating region 70 and the third coating region 72 are formed is the ridge line between the rear plate 32 and the cover plate 40, but it may be at least one of the ridge lines between the cover plate 40 and the cover piece 41, the ridge line between the rear plate 32 and the bottom plate 31, the ridge line between the bottom plate 31 and the front plate 30, the ridge line between the front plate 30 and the side plate 34, the ridge line between the bottom plate 31 and the side plate 34, and the ridge line between the rear plate 32 and the side plate 34.

[0059] Although the preferred embodiment of the present invention has been described above with reference to the accompanying drawings, the present invention is not limited to such an example. It is clear that a person skilled in the art can come up with various modified or altered examples within the scope of the ideas described in the claims, and it is understood that such examples also naturally belong to the technical scope of the present invention.

[0060] The roll-containing box 10 is not limited to the above embodiment, and may have other configurations and shapes. The containing section 20 may have at least a front plate, a bottom plate, a rear plate, and side plates, and the lid section 21 may have at least a lid plate and a cover piece. The film F is not limited to a wrap film for food packaging, and may be aluminum foil, cooking sheet, or the like. [Industrial Applicability]

[0061] INDUSTRIAL APPLICABILITY The present invention is useful in providing a wound body storage box that can suppress cracks at the ridge lines when bent while ensuring water resistance and a good fit. [Explanation of symbols]

[0062] 1. Winding body storage device 10. Rolled body storage box 11 Winding body 20 Storage unit 21 Lid 30 Front Panel 31 Bottom plate 32 Rear plate 34 Side Panel 40 Lid plate 41 Cover piece 70 First Coating Area 71 Second Coating Area 72 Third Coating Area 73 Fourth Coating Area F Film A Ridgeline A1 First Line A2 Second Line C1 border C2 border

Claims

1. A roll storage box comprising: a storage section capable of storing a roll around which a film is wound, the storage section including a front plate, a bottom plate, a rear plate, and side plates, and an open top surface; and a lid section capable of opening and closing the opening at the top surface of the storage section, the lid section including a lid plate and a cover piece, a ridge line is provided between a first plate surface and a second plate surface adjacent to each other, the first plate surface and the second plate surface being selected from the group consisting of the front plate, the bottom plate, the rear plate, the side plate, the cover plate, and the cover piece; the ridge line includes a first line that is shifted from a virtual straight line that linearly connects both ends of the ridge line toward at least one of the first plate surface side or the second plate surface side, The first plate surface and the second plate surface are a first coating region including the first line and disposed along the first line, the first coating region having an arithmetic mean height Sa of less than 3 μm; a second coating region adjacent to the first coating region and spaced apart from the first line, the second coating region having an arithmetic mean height Sa of 3 μm or more; The first coating region and the second coating region have a boundary line shaped along the first line. Rolled body storage box.

2. the first line is a curved line; The boundary line is a curved line. The wound body storage box according to claim 1 .

3. the second coating region has a constant width; The wound body storage box according to claim 1 .

4. the edge includes a second line connected to the first line; The first plate surface and the second plate surface are a third coating region including the second line and disposed along the second line, the third coating region having an arithmetic mean height Sa of less than 3 μm; a fourth coating region adjacent to the third coating region and spaced apart from the second line, the fourth coating region having an arithmetic mean height Sa of 3 μm or more; The wound body storage box according to any one of claims 1 to 3.

5. the third coating region and the fourth coating region have a boundary line shaped along the second line; The wound body storage box according to claim 4.

6. The second line is a straight line or a curved line. The wound body storage box according to claim 4.

7. the third coating region has a constant width; The wound body storage box according to claim 4.

8. The second line is connected to the first line. The wound body storage box according to claim 4.

9. the third coating region and the first coating region are contiguous; The wound body storage box according to claim 4.

10. the width of the first coating region is greater than the width of the third coating region; The wound body storage box according to claim 4.

11. the second coating region and the fourth coating region are contiguous; The wound body storage box according to claim 4.

12. The second coating region is spaced from the edge by 2 mm or more. The wound body storage box according to claim 1 .

13. The second coating region is spaced from the imaginary straight line by 2 mm or more. The wound body storage box according to claim 1 .

14. The second coating area has an embossed area with projections and recesses, and the embossed area has an Spc of 200 mm -1 More than 500 mm -1 or less, and Spd is 15,000 mm -2 More than 30000mm -2 It is configured to: The wound body storage box according to claim 1 .

15. The second coating region has an embossed region with projections and recesses, and the projections of the embossed region have an area of ​​20% or more of the entire embossed region. The wound body storage box according to claim 1 .

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