Sheet structure
By setting movement restriction parts and rib structures at the corners of the packaging, the problem of the stacked tablets shifting position within the packaging is solved, enabling the tablets to be easily removed, especially when there are few tablets remaining, they can still be removed one by one.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- UNI CHARM CORP
- Filing Date
- 2021-12-17
- Publication Date
- 2026-06-30
AI Technical Summary
In the prior art, the stacked sheets are prone to displacement within the packaging, making it difficult to remove the sheets one by one, especially when there are many sheets or few sheets remaining.
Movement restriction parts are provided at the four corners where the longitudinal and transverse sides of the packaging body intersect to restrict the movement of the laminated sheet, ensuring that the laminated sheet is close to the center of the packaging space, and the movement restriction parts and rib structure restrict the movement of the laminated sheet in all directions.
It effectively suppresses the positional shift of the tablet stack, ensuring that tablets can be removed one by one inside the packaging, especially when there are few tablets remaining, it can still be removed smoothly.
Smart Images
Figure CN118215626B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a sheet structure and an outer packaging body for packaging sheet stacks, wherein sheets such as wet wipes are stacked. Background Technology
[0002] A sheet structure is provided, comprising a sheet stack having multiple sheets stacked in the thickness direction and a packaging body (see, for example, Patent Document 1) containing the sheet stack. A packaging opening, serving as a dispensing outlet for the sheet, is formed on the packaging body. The user removes the sheet through the packaging opening. The sheet structure can be used either as the sheet structure itself or as a unit housed within an outer packaging body (see, for example, Patent Document 2). An outer packaging opening, serving as a dispensing outlet for the sheet, is formed on the outer packaging body. When used with the sheet structure housed within the outer packaging body, the sheet is removed through both the packaging opening and the outer packaging opening.
[0003] Existing technical documents
[0004] Patent documents
[0005] Patent Document 1: Japanese Patent Application Publication No. 2018-33560
[0006] Patent Document 2: Japanese Patent Application Publication No. 2020-196517 Summary of the Invention
[0007] Typically, the packaging space of the package is larger than the volume of the sheet stack. Therefore, when used as a sheet structure, the position of the sheet stack within the package may sometimes shift. If this shift occurs, it becomes difficult to guide the sheets to the packaging opening, sometimes leading to accidental folding or multiple sheets being removed, making it difficult to remove them one by one. Furthermore, when used with the sheet structure housed within an outer casing, if the packaging opening is shifted relative to the sheet stack, and the sheet structure is housed within the outer casing based on the shape of the sheet stack, the shift between the packaging opening and the outer casing opening can sometimes make it difficult to remove the sheets through the outer casing opening. In particular, regardless of the usage, in cases where the sheet stack has a large number of sheets or is thick, when the number of remaining sheets decreases, the difference between the volume of the packaging space and the volume of the sheet stack increases, making the shift of the sheet stack within the package more noticeable.
[0008] The present invention was made in view of the above-mentioned problems, and its object is to provide a sheet structure and outer packaging that suppresses the positional displacement of the sheet stacks in the packaging body and makes it easy to remove the sheets one by one.
[0009] A sheet structure includes: a longitudinal direction X and a transverse direction Y extending orthogonally to each other along the planar direction of the sheet; a thickness direction T extending along the stacking direction of the sheet; a sheet stack 50 having multiple sheets stacked on top of each other; and a packaging body 2 consisting of packaging sheets and packaging the sheet stack. The packaging body includes: a packaging space for packaging the sheet stack; a packaging opening 7 serving as an outlet for the sheet; an upper surface 11 extending along the longitudinal and transverse directions and forming the packaging opening; a lower surface 12 facing the upper surface; a pair of longitudinal side surfaces 15 extending along the longitudinal and thickness directions and arranged facing each other; and a pair of transverse side surfaces 17 extending along the transverse and thickness directions and arranged facing each other. In the natural state of the sheet structure, the thickness direction length T3 of the packaging space is 50 mm or more. On the outer surface of each of the pair of longitudinal side surfaces 15, a packaging joint 5 is provided along the longitudinal direction to join the packaging sheets together. Four movement restriction portions 40 are provided at the four corners where the longitudinal and transverse sides intersect in the packaging body. These four movement restriction portions 40 extend from the outer transverse end of the longitudinal side to the outer longitudinal end of the transverse side and restrict the movement of the laminated sheet within the packaging space. The movement restriction portions reach the packaging joint 5. The total longitudinal length (X41 + X42) of the movement restriction portions 40 at the packaging joint is at least 40% of the overall longitudinal length (X5) of the packaging joint.
[0010] An outer casing is mounted on a sheet structure 1 for use. The sheet structure has a sheet stack 50 and a packaging body 2. The sheet stack 50 has multiple sheets stacked on top of each other. The packaging body 2 forms a packaging opening 7 that serves as a dispensing outlet for the sheets. The outer casing has an outer casing opening 67 that overlaps at least a portion of the packaging opening and serves as a dispensing outlet for the sheets. The outer casing has longitudinal and transverse directions extending orthogonally to each other along the planar direction of the sheets, and a thickness direction extending along the stacking direction of the sheets. If the transverse length of the packaging space 3 is set to Y3, the transverse length of the sheet stack is set to Y50, and the transverse length of the outer casing opening is set to Y67, then Y3 - Y50 satisfies... <Y67。 Attached Figure Description
[0011] Figure 1 This is a three-dimensional view of the sheet structure of the implementation method.
[0012] Figure 2 It is along Figure 1 The cross-sectional view of the sheet structure shown by line AA.
[0013] Figure 3 It is along Figure 1 The BB line sheet structure shown is a cross-sectional view.
[0014] Figure 4 This is a top view of a sheet structure.
[0015] Figure 5 This is a diagram illustrating an example of the manufacturing process of a sheet structure.
[0016] Figure 6 It is a three-dimensional view of the outer casing and sheet structure.
[0017] Figure 7 This is a diagram showing the exterior space of the exterior body 60 as viewed from the lower surface side.
[0018] Figure 8 This is a schematic cross-sectional view of the outer casing of a modified example. Detailed Implementation
[0019] (1) Overview of the implementation method
[0020] Based on the description and accompanying drawings, at least the following points are clearly defined. One type of sheet structure includes: a longitudinal direction X and a transverse direction Y extending orthogonally to each other along the planar direction of the sheet; a thickness direction T extending along the stacking direction of the sheet; a sheet stack 50 having multiple sheets stacked together; and a packaging body 2 consisting of packaging sheets and packaging the sheet stack. The packaging body includes: a packaging space for packaging the sheet stack; a packaging opening 7 serving as an outlet for the sheet; an upper surface 11 extending along the longitudinal and transverse directions and forming the packaging opening; a lower surface 12 facing the upper surface; a pair of longitudinal side surfaces 15 extending along the longitudinal and thickness directions and arranged facing each other; and a pair of transverse side surfaces 17 extending along the transverse and thickness directions and arranged facing each other. In the natural state of the sheet structure, the length T3 of the packaging space in the thickness direction is 50 mm or more. On the outer surface of each of the pair of longitudinal side surfaces 15, a packaging joint 5 is provided along the longitudinal direction to join the packaging sheets together. Four movement restriction portions 40 are provided at the four corners where the longitudinal and transverse sides intersect in the packaging body. These four movement restriction portions 40 extend from the outer transverse end of the longitudinal side to the outer longitudinal end of the transverse side and restrict the movement of the sheet stack within the packaging space. The movement restriction portions reach the packaging joint 5. The total longitudinal length (X41 + X42) of the movement restriction portions 40 at the packaging joint is at least 40% of the total longitudinal length (X5) of the packaging joint. By providing movement restriction portions at the four corners in the planar direction of the packaging body, the sheet stack housed in the packaging space can be brought closer to the central side in the planar direction, and its movement can be restricted. Therefore, positional displacement of the sheet stack within the packaging body can be suppressed. In particular, in so-called large-capacity sheet structures with a packaging space thickness of 50 mm or more, by using movement restriction portions to restrict the movement of the sheet stack in the planar direction, it is possible to properly remove the sheet stack through the packaging opening, allowing for sheet removal one by one even when the remaining number of sheets is decreasing.
[0021] According to a preferred embodiment, the movement limiting portion 40 extends from the upper surface 11 and the lower surface 12 into the packaging space 3 and reaches the packaging joint. According to this embodiment, the movement limiting portion can also limit the movement of the laminate in the thickness direction. In particular, by extending the movement limiting portion from the lower surface side, the movement of the laminate can continue to be limited even when the number of remaining sheets is decreasing, allowing the user to properly remove sheets one by one until the last sheet.
[0022] According to a preferred embodiment, the longitudinal inner edge 40X2 of the movement restricting portion is located on the inner side in the longitudinal direction compared to the longitudinal outer edge 7X1 of the packaging opening. According to this embodiment, since the packaging opening is present within the range G40X longitudinally sandwiched by the movement restricting portion, the longitudinal center of the sheet laminate can be aligned in a manner overlapping with the packaging opening 7.
[0023] According to a preferred embodiment, the lateral inner edge 40Y2 of the movement restricting portion is located on the inner side in the lateral direction Y compared to the lateral outer edge 50Y1 of the sheet laminate. The longitudinal inner edge 40X2 of the movement restricting portion is located on the inner side in the longitudinal direction compared to the longitudinal outer edge 50X1 of the sheet laminate. The inner edge 40T2 of the movement restricting portion in the thickness direction is located on the inner side in the thickness direction compared to the outer edge 50T1 of the sheet laminate in the thickness direction. According to this embodiment, the movement of the sheet laminate can be restricted in any of the thickness direction, lateral direction, and longitudinal direction by the movement restricting portion, and the sheet laminate can be positioned.
[0024] According to a preferred embodiment, if the lateral length of the packaging space is Y3, the lateral length of the sheet laminate is Y50, and the lateral length of the packaging opening is Y7, then Y3 - Y50 < Y7 is satisfied. According to this embodiment, even if the lateral position of the sheet laminate in the package body is shifted, the packaging opening is overlapped and arranged with the sheet laminate. Therefore, the sheet can be continuously taken out through the packaging opening.
[0025] According to a preferred embodiment, the lateral inner edge 5Y2 of the packaging joining portion 5 is located on the lower surface 12 side compared to the center 3T3 in the thickness direction of the packaging space. According to this embodiment, the movement restricting portion reaches the packaging joining portion. Since the packaging joining portion is located on the lower surface side compared to the center in the thickness direction of the packaging space, that is, the packaging joining portion is biased toward the lower surface side in the thickness direction, the movement restricting portion can be used to position the sheets with fewer remaining sheets. Therefore, in particular, in the state where the number of remaining sheets is small and the position of the sheets is likely to move, the sheets can be arranged at appropriate positions, and the sheets can be continuously taken out one by one.
[0026] According to a preferred embodiment, at least one of the lateral length Y7 and the longitudinal length X7 of the packaging opening is longer than the thickness direction length T3 of the packaging space. According to this embodiment, since at least one of the lateral length and the longitudinal length of the packaging opening is longer than the thickness direction length of the packaging space, it is easy for a finger to reach the lower surface of the packaging space, and it is easy to take out the sheets one by one through the packaging opening until the last sheet.
[0027] An outer package of one type is used by being mounted on a sheet structure 1. The sheet structure 1 has a sheet laminate 50 and a wrapper 2. The sheet laminate 50 is formed by laminating a plurality of sheets. The wrapper 2 is formed with a packaging opening 7 that serves as an outlet for the sheets. The outer package has an outer opening 67 that overlaps at least a part of the packaging opening and serves as an outlet for the sheets. The outer package has a longitudinal direction, a lateral direction that extend in the plane direction of the sheets and are orthogonal to each other, and a thickness direction that extends in the lamination direction of the sheets. If the length of the lateral direction of the packaging space 3 is set as Y3, the length of the lateral direction of the sheet laminate is set as Y50, and the length of the lateral direction of the outer opening is set as Y67, then Y3 - Y50 < Y67 is satisfied. According to this aspect, even if the position of the sheet laminate in the lateral direction within the wrapper is shifted, the outer opening is overlapped and arranged with the sheet laminate, and the sheets can be continuously taken out through the outer opening.
[0028] According to a preferred aspect, the outer package has an outer space 69 for accommodating the sheet structure. At least one of the length Y67 of the lateral direction of the outer opening and the length X67 of the longitudinal direction of the outer opening is longer than the length T69 of the thickness direction of the outer space. According to this aspect, since either the length of the lateral direction of the outer opening or the length of the longitudinal direction of the packaging opening is longer than the length of the thickness direction of the outer space, it is easy for a finger to reach the lower surface of the outer space, and it is easy to take out the last sheet through the outer opening.
[0029] According to a preferred embodiment, the outer packaging body has: an outer packaging space for receiving the sheet structure; and ribs 70 protruding inward within the outer packaging space and restricting movement of the packaging body. The packaging body has: a packaging space for packaging the sheet stack; an upper surface extending along the longitudinal and transverse directions and forming the packaging opening; a lower surface facing the upper surface; a pair of longitudinal side surfaces extending along the longitudinal and thickness directions and arranged facing each other; and a pair of transverse side surfaces extending along the transverse and thickness directions and arranged facing each other. The ribs 70 extend from the two transverse end faces of the outer packaging space toward the transverse inward side. In the packaging body, four movement restricting portions 40 are provided at the four corners where the longitudinal and transverse side surfaces intersect. These four movement restricting portions 40 extend from the transverse outer ends of the longitudinal side surfaces to the longitudinal outer ends of the transverse side surfaces and restrict movement of the sheet stack within the packaging space. The lateral spacing G70Y between the ribs is shorter than the lateral length Y2 of the package body, but longer than the lateral spacing G40Y between the movement restricting parts. According to this method, since the spacing between the movement restricting parts is shorter than the lateral distance between the ribs, the movement of the package body can be restricted by the ribs, and further, the movement of the laminated sheets within the package body can be restricted by the movement restricting parts. That is, the movement of the laminated sheets can be restricted in stages, the laminated sheets can be positioned, and offset of the laminated sheets can be suppressed.
[0030] According to a preferred embodiment, the outer packaging body has: an outer packaging space for receiving the sheet structure; and ribs protruding inward within the outer packaging space and restricting movement of the packaging body. The packaging body has: a packaging space for packaging the sheet stack; an upper surface extending along the longitudinal and transverse directions and forming the packaging opening; a lower surface facing the upper surface; a pair of longitudinal side surfaces extending along the longitudinal and thickness directions and arranged facing each other; and a pair of transverse side surfaces extending along the transverse and thickness directions and arranged facing each other. The ribs extend from both ends of the longitudinal direction of the outer packaging space toward the inner side of the longitudinal direction. At the four corners where the longitudinal and transverse side surfaces intersect, four movement restricting portions are provided, extending from the transverse outer ends of the longitudinal side surfaces to the longitudinal outer ends of the transverse side surfaces and restricting movement of the sheet stack within the packaging space. The longitudinal spacing G70X of the ribs is shorter than the longitudinal length X2 of the packaging body and longer than the longitudinal spacing G40X between the movement restricting portions 40. According to this method, since the interval between the movement limiting parts is shorter than the longitudinal interval between the ribs, the movement of the package can be limited by the ribs, and further, the movement of the laminated body inside the package can be limited by the movement limiting parts. That is, the movement of the laminated body can be limited in stages, the laminated body can be positioned, and the offset of the laminated body can be suppressed.
[0031] According to a preferred embodiment, the outer packaging body has: an outer packaging space for receiving the sheet structure; and ribs protruding inward within the outer packaging space and restricting movement of the packaging body. The packaging body has: a packaging space for packaging the sheet stack; an upper surface extending along the longitudinal and transverse directions and forming the packaging opening; a lower surface facing the upper surface; a pair of longitudinal side surfaces extending along the longitudinal and thickness directions and arranged facing each other; and a pair of transverse side surfaces extending along the transverse and thickness directions and arranged facing each other. The ribs extend from at least one of the two end faces of the outer packaging space in the thickness direction toward the inward side in the thickness direction. A movement restricting portion is provided in the packaging body, extending inward from the upper and lower surfaces in the thickness direction and restricting movement of the sheet stack within the packaging space. The thickness-direction spacing between the ribs, or the distance G70T between the inner edge of the rib in the thickness direction and the upper or lower end of the outer space facing the rib, is shorter than the thickness-direction length T2 of the package body, but longer than the thickness-direction spacing G40T between the movement restriction portions 40 at the lateral outer edges of the laminated body. According to this method, since the spacing between the movement restriction portions is shorter than the thickness-direction spacing between the ribs, the movement of the package body can be restricted by the ribs, and further, the movement of the laminated body within the package body can be restricted by the movement restriction portions. That is, the movement of the laminated body can be restricted in stages, the laminated body can be positioned, and the offset of the laminated body can be suppressed.
[0032] (2) Overall outline of the sheet structure
[0033] Hereinafter, the sheet structure 1 and the outer casing 60 of the embodiment will be described with reference to the accompanying drawings. It should be noted that in the following description of the drawings, the same or similar parts are labeled with the same or similar reference numerals. However, the drawings are schematic, and attention should be paid to the differences between the scale and actual dimensions. Therefore, specific dimensions should be determined with reference to the following description. Furthermore, the drawings may include parts with different dimensional relationships and scales.
[0034] Figure 1 This is a three-dimensional view of structure 1. Figure 2 It is along Figure 1 The cross-sectional view of the sheet structure 1 shown in Figure AA. Figure 3 It is along Figure 1 The cross-sectional view of the sheet structure 1 shown in the BB line. Figure 4This is a top view of sheet structure 1. Sheet structure 1 has a longitudinal direction X and a transverse direction Y that extend orthogonally to each other along the planar direction of sheet 51, and a thickness direction T that extends along the stacking direction of sheet 51. Sheet structure 1 has a sheet stack 50 on which multiple sheets 51 are stacked and a package 2 that packages the sheet stack 50.
[0035] The packaging body 2 is composed of a packaging sheet 4. The packaging body 2 may have at least a packaging sheet 4, or it may have materials other than the packaging sheet 4 (e.g., a seal described later). The packaging sheet 4 may be made of film. The material of the film is not particularly limited; for example, it may be a material in which polyethylene is mixed with polypropylene. The packaging body 2 has a packaging space 3 of the packaging sheet laminate 50 and a packaging opening 7 that serves as the outlet for the sheet 51. The packaging opening 7 may be disposed on the upper surface 11. That is, the surface on which the packaging opening 7 is formed may also constitute the upper surface 11. The packaging opening 7 may be covered by a peelable seal (not shown) before being covered by the cover 61 of the outer packaging body 60 described later. When the user installs the cover 61 onto the packaging body 2, the seal can be peeled off, exposing the packaging opening 7, and the cover 61 can be used to cover the packaging opening 7. The sheet structure 1 can be used with the outer packaging body 60, or it can be used in the state of the sheet structure 1 by opening and closing the packaging opening 7 via the seal.
[0036] The size of the packaging opening 7 only needs to be large enough to allow each piece 51 to be pulled out. The shape of the packaging opening 7, when viewed from above, can be elliptical, horizontally longer (vertically longer), or perfectly circular; its shape is not limited. Preferably, to prevent the pieces 51 from getting stuck, it can be curved and without sharp corners. In this embodiment, the packaging opening 7 is a longitudinally elongated shape where the length in the vertical direction (X) is longer than the length in the horizontal direction (Y). The packaging opening 7 can be positioned at the center of both the vertical direction (X) and the horizontal direction (Y) of the packaging body 2.
[0037] The packaging body 2 has an upper surface 11, a lower surface 12, a pair of longitudinal side surfaces 15, and a pair of transverse side surfaces 17. The upper surface 11 and the lower surface 12 are surfaces extending along the longitudinal direction X and the transverse direction Y, and along the plane of the sheet 51. A packaging opening 7 is formed on the upper surface 11. The upper surface 11 and the lower surface 12 are arranged with a packaging space 3 in the thickness direction T. The longitudinal side surfaces 15 are surfaces extending along the longitudinal direction X and the thickness direction T. The pair of longitudinal side surfaces 15 are arranged with a packaging space 3 in the transverse direction Y. The transverse side surfaces 17 are surfaces extending along the transverse direction Y and the thickness direction T. The pair of transverse side surfaces 17 are arranged with a packaging space 3 in the longitudinal direction X. The packaging space 3 is sandwiched between the inner surfaces of the longitudinal side surfaces 15 in the transverse direction Y, between the inner surfaces of the transverse side surfaces 17 in the longitudinal direction X, and between the inner surfaces of the upper surface 11 and the lower surface 12 in the thickness direction T. The packaging body can be approximately cuboid. Each surface can be a rectangular surface. Alternatively, the faces can intersect at their boundaries not perpendicularly, but in a curved manner.
[0038] The sheet 51 of the sheet laminate 50 can be a dry sheet or a wet sheet (e.g., a wet paper towel). The sheet laminate 50 is folded at least with the crease FL along the transverse Y as the base point. In the folded state, adjacent sheets 51 are arranged alternately in the thickness direction T.
[0039] In the natural state of the sheet structure 1, the length T3 of the thickness direction T of the packaging space 3 can be 50 mm or more, preferably 55 mm or more. The length T50 of the thickness direction T of the sheet stack 50 before use can be 45 mm or more, preferably 50 mm or more. In addition, the number of sheets 51 in the sheet stack 50 before use can be 70 or more, preferably 80 or more. That is, the sheet structure 1 of this embodiment is a so-called large-capacity sheet structure. In the form where the thickness of the sheet stack 50 and the packaging space 3 are both thick, such as when the number of sheets 51 in the sheet stack 50 is large, when the remaining number of sheets 51 decreases, the difference between the volume of the packaging space 3 and the volume of the sheet stack 50 becomes larger, and the displacement of the sheet stack 50 in the packaging body is likely to become significant. This embodiment is configured such that when the length of the thickness direction T of the packaging space 3 is long, the positional displacement of the sheet stack 50 can be suppressed. It should be noted that the structure for suppressing the positional displacement of the sheet stack 50 will be described in detail later.
[0040] Here, the natural state of sheet structure 1 refers to the state where sheet structure 1 is placed on a flat board, and the packaging joints 5 on both sides are held by hand and stretched laterally (Y) outward until the wrinkles on the upper surface 11 and lower surface 12 of the packaging body 2 are no longer visible. Then, with the stretching hands released, it is placed at 25°C for 30 minutes. It should be noted that in the following description, the positional relationship, length, and spacing of each component, unless otherwise specified, refer to the positional relationship, length, and spacing in the natural state, and are before the sheet structure is used (the state in which all sheets are stacked).
[0041] On the outer surface of each of a pair of longitudinal side surfaces 15, a packaging joint portion 5 is provided along the longitudinal direction X to join the packaging pieces 4 together. The length of the longitudinal direction X of the packaging joint portion 5 may be the same as the length of the longitudinal direction X of the longitudinal side surface 15, or it may be the same as the length of the longitudinal direction X of the upper surface 11 and the lower surface 12. The packaging joint portion 5 extends from the end edge of the transverse direction Y of the packaging body 2 toward the inner side of the transverse direction Y, and has a predetermined length in the transverse direction Y. The packaging joint portion 5 may be a part where the packaging pieces 4 are joined together by a welding method such as heat fusion or ultrasonic welding, or it may be a part joined by an adhesive material. A pair of packaging joint portions 5 are provided at intervals in the transverse direction Y, having a length of... Figure 4The top view shown depicts a first packaging joint 5A on the left and a second packaging joint 5B on the right. The first packaging joint 5A and the second packaging joint 5B sandwich the packaging space 3 in the transverse Y direction. The inner edge 5Y2 of each packaging joint 5 in the transverse Y direction constitutes the outer edge 3Y1 of the packaging space 3 in the transverse Y direction. That is, the length Y3 of the packaging space 3 in the transverse Y direction is the interval between the inner edges 5Y2 of the packaging joint 5 in the transverse Y direction.
[0042] Figure 5 This diagram schematically illustrates an example of the manufacturing process of the sheet structure 1. Manufacturing the sheet structure 1 may include at least steps 1 to 4. In step 1 (S1), a cylindrical packaging sheet 4 is conveyed along the conveying direction MD. Step 2 (S2) is, after step 1, a sheet laminate 50 is disposed in the hollow portion of the cylindrical packaging sheet 4. Step 3 (S3) is, after step 2, a pressing member is pressed into the side of the packaging sheet 4 along the conveying direction MD (the side extending from the transverse side along the conveying direction MD) towards the inside of the intersecting direction CD, which is orthogonal to the conveying direction MD, folding the packaging sheet 4 towards the inside of the intersecting direction CD. Step 4 (S4) is, after step 3, the folded packaging sheets 4 are joined together to form a packaging joint 5. The packaging joint 5 is formed over the entire area of the packaging body 2 in the intersecting direction (longitudinal). The packaging joint 5 has two layers formed by joining the two packaging sheets 4 on the upper surface 11 side and the lower surface 12 side (see reference). Figure 2 ) and the four-layer section formed by sandwiching the folded packaging sheet 4 between the two packaging sheets 4 and joining the four layers of packaging sheets 4 (see reference) Figure 3 In the four-layer section, the folded packaging sheet 4 extends inward in the longitudinal direction (X) and inward in the transverse direction (Y) between the two packaging sheets 4. The folded packaging sheet 4 extends within the packaging space 3, constituting the movement restriction part 40 of the present invention.
[0043] Next, the structure for suppressing the positional displacement of the sheet-layer 50 in the sheet structure 1 constructed as described above will be described in detail. The packaging body 2 of the sheet structure 1 includes a movement limiting portion 40, which restricts the movement of the sheet-layer 50 within the packaging space 3. The movement limiting portion 40, when viewed from above, is respectively provided at the four corners where the longitudinal side 15 and the transverse side 17 intersect. The movement limiting portion 40 extends from the outer ends of the longitudinal side 15 and the transverse side 17 towards the outer end of the longitudinal side 17, reaching both sides of the longitudinal side 15 and the transverse side 17. The movement limiting portion 40 has a predetermined length in the longitudinal direction X and a predetermined length in the transverse direction Y. Here, in this invention, the outer edge refers to the edge located on the outer side, and the inner edge refers to the edge located on the inner side. Furthermore, here, the outer end portion refers to the portion including the outer edge and occupying a certain area. Figure 4In the top view shown, the four movement restricting parts may include a first movement restricting part 41 located on the lower left, a second movement restricting part 42 located on the upper left, a third movement restricting part 43 located on the lower right, and a fourth movement restricting part 44 located on the upper right. The first movement restricting part 41 and the second movement restricting part 42 reach the first packaging joint 5A. The first movement restricting part 41 and the second movement restricting part 42 are arranged spaced apart in the longitudinal direction X. The third movement restricting part 43 and the fourth movement restricting part 44 reach the second packaging joint 5B. The third movement restricting part 43 and the fourth movement restricting part 44 are arranged spaced apart in the longitudinal direction X. It should be noted that, in a modified example, the first movement restricting part 41 and the second movement restricting part 42 may also be adjacent in the longitudinal direction X, and the third movement restricting part 43 and the fourth movement restricting part 44 may also be adjacent in the longitudinal direction X. The length of the longitudinal X of each movement restriction part 40 is longest at the outer edge of the transverse Y of the movement restriction part 40 (the position that reaches the inner edge 5Y2 of the packaging joint 5), and becomes shorter towards the inner side of the transverse Y. Figure 4 The maximum length X41 in the longitudinal direction X of the first movement limiting part 41 and the maximum length X42 in the longitudinal direction X of the second movement limiting part 42 are indicated. The movement limiting part 40 extends from the outside to the inside in the longitudinal direction X and from the inside to the outside in the transverse direction Y.
[0044] The first movement restriction unit 41 and the third movement restriction unit 43 arrived Figure 4 The upper transverse side 17 is shown. The first movement limiting part 41 and the third movement limiting part 43 are arranged at a distance from each other in the transverse Y direction. The second movement limiting part 42 and the fourth movement limiting part 44 reach... Figure 4 The lower transverse side 17 is shown. The second movement limiting part 42 and the fourth movement limiting part 44 are arranged at intervals in the transverse Y direction. It should be noted that, in a modified example, the first movement limiting part 41 and the third movement limiting part 43 may also be adjacent in the transverse Y direction, and the second movement limiting part 42 and the fourth movement limiting part 44 may also be adjacent in the transverse Y direction. The transverse Y length of each movement limiting part 40 is longest at the outer edge of the longitudinal X direction of the movement limiting part 40, and shortens towards the inner side of the longitudinal X direction. Figure 4 This indicates the maximum lateral length Y41 of the first movement restriction part 41 and the maximum lateral length Y43 of the third movement restriction part 43.
[0045] like Figure 3As shown, each movement restriction portion 40 can be formed overlapping in the thickness direction T. Specifically, the first movement restriction portion 41 can have: an upper first movement restriction portion 411, which extends from the upper surface 11 side inward in the thickness direction T and reaches the first packaging joint 5A; and a lower first movement restriction portion 412, which extends from the lower surface 12 side inward in the thickness direction T and reaches the first packaging joint 5A. Similarly, the second to third movement restriction portions 42 can each have a movement restriction portion extending from the upper surface 11 side and a movement restriction portion extending from the lower surface 12 side. The upper first movement restriction portion 411 and the lower first movement restriction portion 412 overlap in the thickness direction T at the position where they reach the first packaging joint 5A. The outer edge 40T1 of the movement restriction portion 40 in the thickness direction T reaches the upper surface 11 or the lower surface 12. The inner edge 40T2 of the movement restriction portion 40 in the thickness direction T reaches the packaging joint 5A. The movement restriction part 40 extends from the outside of the thickness direction T toward the inside and from the inside of the transverse direction Y toward the outside.
[0046] The total length X40 of the longitudinal direction of the movement restriction portion 40 at the packaging joint 5 is 40% or more of the overall longitudinal direction length X5 of the packaging joint 5. This is the total length of the movement restriction portion 40 reaching the arrival position of the packaging joint 5. More specifically, the total length (X41+X42) of the sum of the longitudinal direction length X41 of the first movement restriction portion 41 at the arrival position and the longitudinal direction length X42 of the second movement restriction portion 42 at the arrival position is 40% or more of the overall longitudinal direction length X5A of the first packaging joint 5A. The total length (X43+X44) of the sum of the longitudinal direction length X43 of the third movement restriction portion 43 at the arrival position and the longitudinal direction length X44 of the fourth movement restriction portion 44 at the arrival position is 40% or more of the overall longitudinal direction length X5B of the second packaging joint 5B. It should be noted that the sheet structure 1 only needs to satisfy at least one of (X41+X42)≥(X5A×0.4) and (X43+X44)≥(X5B×0.4), preferably both. Movement restriction portions 40 extending into the packaging space 3 are provided at the four corners where the longitudinal side 15 and the transverse side 17 intersect. By using the movement restriction portions 40 at the four corners in the planar direction of the packaging body 2, the sheet stack 50 housed in the packaging space 3 can be brought closer to the central side in the planar direction, and movement is restricted. The applicant has conducted dedicated research, and it is evident that by satisfying X40≥(X5×0.4), the positional displacement of the sheet stack 50 within the packaging body 2 can be effectively suppressed. In particular, in a so-called large-capacity sheet structure 1 with a thickness of 50mm or more in the packaging space 3, by using the movement restriction portions 40 to restrict the movement of the sheet stack 50 in the planar direction, it is possible to properly remove the sheet through the packaging opening 7, and even when the remaining number of sheets decreases, the sheets 51 can continue to be removed one by one.
[0047] The movement restriction portion 40 can extend from the upper surface 11 and the lower surface 12 into the packaging space 3 and reach the packaging joint portion 5. According to this structure, the movement restriction portion 40 can also restrict the movement of the sheet stack 50 in the thickness direction T. In particular, by extending the movement restriction portion 40 from the lower surface 12 side, even when the number of remaining sheets is decreasing, the movement of the sheet stack 50 can continue to be restricted, allowing the user to properly remove the sheets one by one until the last sheet. Furthermore, the packaging joint portion is the part where the packaging sheets 4 join together, and has relatively high rigidity. By extending the movement restriction portion 40 to this rigid portion, the position of the movement restriction portion 40 is difficult to shift, easily achieving the effect of suppressing positional shift of the sheet structure using the movement restriction portion 40.
[0048] like Figure 4As shown, the inner edge 40X2 in the longitudinal direction X of the movement restricting portion 40 can be located on the inner side in the longitudinal direction X compared to the outer edge 7X1 in the longitudinal direction X of the packaging opening 7. According to this structure, since the packaging opening 7 is within the range G40X sandwiched by the movement restricting portion 40 in the longitudinal direction X, the center in the longitudinal direction X of the sheet laminate 50 can be aligned in an overlapping manner with the packaging opening 7. In addition, the interval G40X between the movement restricting portions 40 in the longitudinal direction X can be shorter than the length X7 in the longitudinal direction X of the packaging opening 7. According to this structure, the packaging opening 7 can be overlapped and arranged over the entire longitudinal direction X within the range where the movement in the longitudinal direction X is restricted by the movement restricting portion 40. Therefore, it is easy to take out the sheet 51 through the packaging opening 7. In addition, as in the present embodiment, in the form where each sheet 51 is folded starting from the crease FL along the lateral direction Y, it is preferable that the packaging opening 7 is arranged on the upper surface 11 side of each sheet 51 and overlaps with the edge 51Y extending along the lateral direction Y (refer to Figure 1 ). Therefore, the outer edge 7X1 in the longitudinal direction X of the packaging opening 7 can be located on the outer side in the longitudinal direction X compared to the edge 51Y of the sheet 51.
[0049] The inner edge 40Y2 in the lateral direction Y of the movement restricting portion 40 can be located on the inner side in the lateral direction Y compared to the outer edge 50Y1 in the lateral direction Y of the sheet laminate 50. In addition, the inner edge 40X2 in the longitudinal direction X of the movement restricting portion 40 can be located on the inner side in the longitudinal direction X compared to the outer edge 50X1 in the longitudinal direction X of the sheet laminate 50. In addition, the inner edge 40T2 in the thickness direction T of the movement restricting portion 40 can be located on the inner side in the thickness direction T compared to the outer edge 50T in the thickness direction T of the sheet laminate 50. According to this structure, the movement of the sheet laminate 50 can be restricted in any of the thickness direction T, lateral direction Y, and longitudinal direction X by the movement restricting portion 40, and the sheet laminate 50 can be positioned.
[0050] As Figure 2 shown, if the length in the lateral direction Y of the packaging space 3 is set as Y3, the length in the lateral direction Y of the sheet laminate 50 is set as Y50, and the length in the lateral direction Y of the packaging opening 7 is set as Y7, then Y3 - Y50 < Y7 can be satisfied. According to this structure, even if the position of the sheet laminate 50 in the lateral direction Y in the package 2 is shifted, the packaging opening 7 is overlapped and arranged with the sheet laminate 50. Therefore, the sheet 51 can be continuously taken out through the packaging opening 7. It should be noted that if the number of sheets of the sheet laminate 50 decreases, the length Y3 in the lateral direction Y of the packaging space 3 becomes longer, and sometimes Y3 - Y50 < Y7 cannot be satisfied. However, even when Y3 - Y50 < Y7 is not satisfied in the form with a small number of sheets 51, it is sufficient that Y3 - Y50 < Y7 is satisfied in the state where all the sheets 51 are laminated (the state before use).
[0051] As Figure 3As shown, the inner edge 5Y2 of the transverse Y of the packaging joint 5 can be located on the lower surface 12 side than the center 3T3 in the thickness direction T of the packaging space 3. The movement restriction part 40 reaches the packaging joint 5. Since the packaging joint 5 is located on the lower surface 12 side than the center 3T3 in the thickness direction T of the packaging space 3, that is, the packaging joint 5 is biased towards the lower surface 12 side in the thickness direction T, the movement restriction part 40 can be used to position sheets with fewer remaining sheets. Therefore, in particular, when the remaining sheets are few and the position of the sheet 51 is easy to move, the sheet 51 can be positioned appropriately, and the sheet 51 can be taken out one by one.
[0052] At least one of the length Y7 of the transverse Y direction of the packaging opening 7 and the length X7 of the longitudinal direction of the packaging opening 7 can be longer than the length T3 of the thickness direction T of the packaging space 3. That is, the sheet structure 1 can satisfy at least one of Y7>T3 and X7>T3. According to this structure, since either the length Y7 of the transverse Y direction of the packaging opening 7 and the length X7 of the longitudinal X direction of the packaging opening 7 is longer than the length T3 of the thickness direction T of the packaging space 3, it is easy to reach the lower surface of the packaging space 3 with a finger, and it is easy to take out the sheets 51 one by one through the packaging opening 7 until the last sheet 51. In addition, the packaging opening 7 can be longitudinally elongated. According to this structure, even if the sheet stack 50 in the longitudinal X direction is offset, it is easy to continue taking out the sheets 51 through the packaging opening 7. In a modified example, the packaging opening 7 can be transversely elongated. According to this structure, even if the sheet stack 50 in the transverse Y direction is offset, it is easy to continue taking out the sheets 51 through the packaging opening 7.
[0053] like Figure 2 As shown, the transverse gap (D1+D2) between the sheet stack 50 and the inner surface of the packaging body 2 can be 10 mm or more, preferably 20 mm or more. The inner surface of the packaging body 2 can be the outer edge of the packaging space 3, D1 can be the interval between the first packaging joint 5A and the transverse Y of the sheet stack 50, and D2 can be the interval between the second packaging joint 5B and the transverse Y of the sheet stack 50. According to this structure, the transverse Y position of the sheet stack 50 can be staggered within the packaging body 2. For example, when continuing to use the sheet 51, the length of the transverse Y of the packaging body 2 can be shortened, making it compact. By making the packaging body 2 compact, it is easy to know the remaining number of sheets 51 from the outside of the packaging body 2. In addition, by making the packaging body 2 compact, air in the packaging space 3 can be expelled, suppressing the drying of the sheet 51.
[0054] In addition, the gap (D1 + D2) in the lateral direction Y between the sheet laminate 50 and the inner surface of the package 2 can be smaller than the length T50 in the thickness direction T of the sheet laminate 50. With this structure, the remaining portion in the lateral direction Y of the package 2 is likely to be arranged along the side surface of the sheet laminate 50, and it is difficult to arrange this remaining portion on the upper surface side and the lower surface side of the package 2. Suppose that the sheet structure 1 is housed in the outer package with the remaining portion arranged on the upper surface 11 side and the lower surface 12 side of the package 2. Then, the remaining portion may accidentally block the packaging opening 7, or the sheet laminate 50 may be housed in the outer package in a bent state, making it likely difficult to smoothly pull out the sheet 51. However, by satisfying (D1 + D2) < T50, the remaining portion will not be arranged on the upper surface 11 side and the lower surface 12 side of the sheet laminate 50, and it is easy to smoothly continue to take out the sheet 51.
[0055] (3) Structure of the outer package
[0056] Next, refer to Figures 6 to 8 to describe the outer package 60. Figure 6 is a perspective view of the outer package 60 and the sheet structure 1, Figure 7 is a view of the outer package space 69 of the outer package 60 observed from the lower surface 12 side. Figure 8 is a schematic cross-sectional view of the outer package 60 of a modified example. The outer package is used by being mounted on the sheet structure 1. The outer package 60 has a longitudinal direction X and a lateral direction Y that extend in the plane direction of the sheet 51 and are orthogonal to each other, and a thickness direction T that extends in the stacking direction of the sheet 51. The directions of the outer package 60 are the same as those of the sheet structure 1. The outer package 60 has an outer package opening 67 that overlaps at least a part of the packaging opening 7 and serves as an outlet for the sheet 51.
[0057] The outer casing 60 may consist only of a covering portion 61 covering at least a portion of the upper surface 11 of the sheet structure 1, with the covering portion 61 detachably mounted relative to the sheet structure 1. Alternatively, it may have an enclosure portion 62 integrated with the covering portion 61 and surrounding the entire sheet structure 1. In this embodiment, the outer casing 60 has a covering portion 61 and an enclosure portion 62. The covering portion 61 covers the upper surface 11 of the sheet structure 1. The enclosure portion 62 is integrated with the covering portion 61 and covers the side and lower surfaces of the sheet structure 1. The enclosure portion 62 has a lower surface region 612 covering the lower surface 12 and a side region 615 covering a pair of longitudinal side surfaces 15 and a pair of transverse side surfaces. The lower surface region 612 is configured to be detachable relative to the side region 615. The sheet structure 1 can be removed or inserted relative to the outer casing 60 when the lower surface region 612 is removed relative to the side region 615. The outer casing 60 has an outer casing space 69 for accommodating the sheet structure 1. The outer space 69 is the area surrounded by the surrounding portion (side region 615 and lower surface region 612) 62 and the covering portion 61. The length Y69 of the transverse Y of the outer space 69 is the transverse interval between the side regions 615 disposed on the outer sides of a pair of longitudinal sides, and the length X69 of the longitudinal X of the outer space 69 is the longitudinal interval between the side regions 615 disposed on the outer sides of a pair of transverse sides 17. In addition, the length T69 of the outer space 69 in the thickness direction T is the thickness direction interval between the covering portion 61 and the lower surface region 612.
[0058] It should be noted that in the form where the outer casing 60 consists only of the cover portion 61, the cover portion 61 may be provided with an adhesive portion, which is then attached to the outer surface of the sheet structure 1. An example of an outer casing consisting only of the cover portion 61 could be a structure having a cover portion that can be opened and closed freely to cover the outer casing opening 67, a base portion disposed around the outer casing opening 67, and a hinge portion that serves as the opening and closing reference point for the cover portion relative to the base portion. When the user removes the sheet 51, the cover portion is opened using the hinge portion as the reference point; when the sheet 51 is not being removed, the cover portion is closed to cover the outer casing opening 67.
[0059] The exterior opening 67 can be in a vertically elongated shape or a horizontally elongated shape. The exterior opening in the present embodiment is in a horizontally elongated shape, and has a separation guiding portion 68 that bulges inward in the longitudinal direction X at the center of the transverse direction Y of the exterior opening 67. The separation guiding portion 68 is configured to project inward from the outer edge of the opening, that is, the opening outer edge, when viewed from above the exterior opening 67, and guides the separation of the guide sheets 51 from each other. The separation guiding portion 68 can be a portion that projects inward in the longitudinal direction X compared to the outer edge of the longitudinal direction X of the exterior opening 67. It should be noted that in a modified example, the separation guiding portion 68 can also be a portion that projects inward in the transverse direction Y compared to the outer edge of the transverse direction Y of the exterior opening 67. The user pulls out the sheet 51 through the packaging opening 7 and the exterior opening 67. At this time, the separation guiding portion 68 functions as follows: when it touches the sheet 51 and it seems that the sheet to be taken out and the sheet 51 below it (on the side of the lower surface 12) will be pulled out together, only the sheet to be taken out is pulled out.
[0060] If the length of the transverse direction of the packaging space 3 of the package 2 is set as Y3, the length of the transverse direction Y of the sheet laminate 50 is set as Y50, and the length of the transverse direction Y of the exterior opening 67 is set as Y67, then Y3 - Y50 < Y67 can be satisfied. According to this structure, even if the position of the transverse direction Y of the sheet laminate 50 in the package 2 is shifted, the exterior opening 67 is overlapped and arranged with the sheet laminate 50, and the sheet 51 can be continuously taken out through the exterior opening 67.
[0061] At least one of the length Y67 of the transverse direction Y and the length X67 of the longitudinal direction X of the exterior opening 67 can be longer than the length T69 in the thickness direction T of the exterior space 69. According to this structure, since either the length of the transverse direction Y of the exterior opening 67 or the length of the longitudinal direction of the packaging opening is longer than the length in the thickness direction of the exterior space, it is easy for a finger to reach the lower surface of the exterior space 69, and it is easy to take out the last sheet through the exterior opening 67.
[0062] The exterior body 60 can have a rib 70 that projects inward in the exterior space 69 and restricts the movement of the package 2. Figure 7This is a view of the outer casing 60 with its lower surface area removed, viewed from the lower surface side. The outer casing 60 has four ribs 70 protruding inwards toward the outer casing space 69. The ribs 70 are spaced apart in the longitudinal direction (X) and in the transverse direction (Y). The ribs 70 extend inwards from both ends of the transverse direction (Y) of the outer casing space 69. The transverse (Y) interval G70Y between the ribs 70 is shorter than the transverse (Y) length Y2 of the packaging body 2, but longer than the transverse (Y) interval G40Y between the movement limiting parts 40. With this structure, the ribs 70 can be used to limit the transverse (Y) movement of the packaging body 2. Furthermore, since the transverse (Y) interval G40Y of the movement limiting parts 40 is shorter than the transverse (Y) interval between the ribs 70, the ribs 70 can be used to limit the movement of the packaging body 2, and consequently, the movement of the sheet-like stack 50 within the packaging body 2 can be limited by the movement limiting parts 40. That is, it can restrict the movement of the laminate 50 in stages, locate the laminate 50, and suppress the offset of the laminate 50.
[0063] Ribs 70 can extend longitudinally inward from both ends of the longitudinal X of the outer packaging space 69. The longitudinal spacing G70X of the ribs 70 is shorter than the longitudinal length X2 of the packaging body 2, but longer than the longitudinal X spacing G40X between the movement limiting parts 40. According to this structure, the longitudinal X movement of the packaging body 2 can be limited by the ribs 70. In addition, since the longitudinal X spacing G40X between the movement limiting parts 40 is shorter than the longitudinal X spacing G70X between the ribs 70, the longitudinal X movement of the packaging body 2 can be limited by the ribs 70, and thus the movement of the sheet stack 50 within the packaging body 2 can be limited by the movement limiting parts 40. That is, the movement of the sheet stack 50 can be limited in stages, the sheet stack 50 can be positioned, and the offset of the sheet stack 50 can be suppressed.
[0064] Figure 8 This is a schematic cross-sectional view of the modified outer casing 60P. Figure 8 The cross-section shown is a cross-section along a surface extending in the thickness direction T and the transverse direction Y. In the modified example, the outer casing 60P is configured such that the side region 615 can be separated in the vertical direction. The upper side region 6151 is integrated with the cover 61, and the lower side region 6152 is integrated with the lower surface region 612. The cover 61 and the upper side region 6151 are configured to be openable and closed relative to the lower side region 6152 via a hinge or the like, allowing the sheet structure 1 to be removed or inserted in the open state. The modified example's outer casing 60P is provided with ribs 70P that restrict the movement of the sheet structure 1 in the thickness direction T. Figure 8The ribs 70P of the outer casing 60P shown extend inward from the lower surface region 612 in the thickness direction T. It should be noted that the ribs 70P can extend inward from at least one of the two end faces of the outer casing space 69 in the thickness direction T, or they can extend inward from the inner surface of the cover portion 61 in the thickness direction T. In the configuration where the ribs 70P are separately arranged on both sides in the vertical direction, the spacing in the thickness direction T between the ribs 70P can be shorter than the length T2 of the thickness direction T of the packaging body 2, and longer than the spacing G40T in the thickness direction T between the movement restriction portions 40 at the outer edge of the transverse Y of the laminate 50. Furthermore, in the configuration where rib 70 is only provided on the upper or lower side, the interval G70T between the inner edge of the thickness direction T of rib 70 and the upper or lower end of the outer casing space 69 facing the rib can be shorter than the length T2 of the thickness direction T of the packaging body 2, and longer than the interval G40T of the thickness direction T between the movement restriction portions 40 at the transverse outer edge 50Y1 of the sheet stack. In the configuration where rib 70P is provided on the lower side, G70T is the interval T of the thickness direction between the upper end of rib 70P and the upper end of the outer casing space 69; in the configuration where rib 70P is provided on the upper side, G70T is the interval T of the thickness direction between the lower end of rib 70P and the lower end of the outer casing space 69. It should be noted that the length T2 of the thickness direction T of the packaging body 2 and the interval G40T of the thickness direction T between the movement restriction portions 40 are not the lengths in the state where the sheet structure 1 is housed in the outer casing, but the lengths in the state before it is housed. According to this structure, by housing the sheet structure 1 in the outer casing, the movement of the package 2 in the thickness direction T can be restricted by the rib 70P, and the movement of the sheet stack 50 inside the package 2 can be restricted by the movement restriction part 40. That is, the movement of the sheet stack 50 can be restricted in stages, the sheet stack 50 can be positioned, and the offset of the sheet stack 50 can be suppressed.
[0065] The present invention has been described in detail above using the embodiments described above. However, it will be apparent to those skilled in the art that the present invention is not limited to the embodiments described in this specification. The present invention can be implemented by modifications and variations without departing from the spirit and scope of the invention as defined by the claims. Therefore, the description in this specification is for illustrative purposes and is not intended to be restrictive in any way. In the above embodiment, the movement restriction part 40 is constituted by the folded portion of the packaging sheet 4. However, in other embodiments, it may be constituted by a sheet other than the packaging sheet 4, or by a component other than a sheet.
[0066] It should be noted that the entire contents of Japanese Patent Application No. 2021-185165, filed on November 12, 2021, are incorporated herein by reference.
[0067] Industrial applicability
[0068] According to this method, a sheet structure and outer packaging can be provided that suppresses positional displacement of the sheet stacks within a composite packaging body and allows for easy removal of the sheets one by one.
[0069] Explanation of reference numerals in the attached figures
[0070] 1: Sheet structure; 2: Packaging body; 3: Packaging space; 4: Packaging sheet; 5: Packaging joint; 7: Packaging opening; 11: Upper surface; 12: Lower surface; 15: Longitudinal side; 17: Transverse side; 40, 41, 42, 43, 44: Movement restriction part; 50: Sheet stack; 51: Sheet; 60, 60P: Outer body; 61: Cover part; 62: Enclosing part; 67: Outer opening; 68: Separation guide part; 69: Outer space; 612: Lower surface area; 615: Side area; 70, 70P: Rib; T: Thickness direction; X: Longitudinal; Y: Transverse
Claims
1. A sheet structure comprising: longitudinal and transverse directions extending orthogonally to each other along the planar direction of the sheet; a thickness direction extending along the stacking direction of the sheet; a sheet stack having a plurality of the sheets stacked thereon; and a package consisting of packaging sheets and packaging the sheet stack. The packaging body has: a packaging space for packaging the laminated sheet; a packaging opening serving as an outlet for the sheet; an upper surface extending along the longitudinal and transverse directions and forming the packaging opening; a lower surface facing the upper surface; a pair of longitudinal side surfaces extending along the longitudinal and thickness directions and arranged facing each other; and a pair of transverse side surfaces extending along the transverse and thickness directions and arranged facing each other, wherein... In the natural state of the sheet structure, the length of the packaging space in the thickness direction is 50 mm or more. On the outer surface of each of the pair of longitudinal sides, a packaging joint is provided along the longitudinal direction to join the packaging pieces together. In the packaging body, four movement limiting parts are provided at the four corners where the longitudinal side and the transverse side intersect. The four movement limiting parts extend from the transverse outer end of the longitudinal side to the longitudinal outer end of the transverse side and limit the movement of the sheet stack within the packaging space. The movement restriction part reaches the packaging joint. The total longitudinal length of the movement restriction portion at the packaging joint is more than 40% of the overall longitudinal length of the packaging joint. The inner longitudinal edge of the movement restriction portion is located inside the longitudinal direction of the outer longitudinal edge of the packaging opening.
2. The sheet structure as described in claim 1, wherein, The movement restriction portions extend from the upper surface and the lower surface into the packaging space and reach the packaging joint.
3. The sheet structure as described in claim 1 or 2, wherein, The inner edge of the lateral direction of the movement restriction portion is located inside the outer edge of the lateral direction of the laminate. The inner edge of the longitudinal direction of the movement restriction portion is located inside the outer edge of the longitudinal direction of the laminate. The inner edge of the movement restriction portion in the thickness direction is located inside the outer edge of the laminate in the thickness direction.
4. The sheet structure as described in claim 1 or 2, wherein, If the lateral length of the packaging space is set as Y3, The lateral length of the laminate is set to Y50. If the lateral length of the packaging opening is set to Y7, then... Satisfying Y3-Y50 <Y7。 5. The sheet structure as described in claim 1 or 2, wherein, The transverse inner edge of the packaging joint is located on the lower surface side relative to the center of the packaging space in the thickness direction.
6. The sheet structure as described in claim 1 or 2, wherein, At least one of the lateral length and the longitudinal length of the packaging opening is longer than the length of the packaging space in the thickness direction.