Packaging box for transport

Abstract

To constitute a fixing structure for preventing positional deviation of an article inside a box body with one member, in a packaging box for transport.SOLUTION: A packaging box for transport includes: a box body 2 having a bottom plate part 21 and a peripheral wall part 22; and a fixing structure member 3 including a pair of fixing plate parts 32 connected to a bottom surface plate part 31 and both sides of the bottom surface plate part in a foldable manner. Each fixing plate part includes a first support plate part 33, a contact plate part 34 and a second support plate part 35 connected in a foldable manner sequentially side by side from the bottom surface plate part side. The packaging box for transport includes a recessed contact surface 341 in which the fixing structure member is stored inside the box body, the bottom surface plate part is arranged being overlapped with the bottom plate part, then each first support plate part of the pair of fixing plate parts is folded back with respect to the bottom surface plate part, and each second support plate part is folded back with respect to each first support plate part, and thereby the pair of contact plate parts are opposing to each other.SELECTED DRAWING: Figure 7

Description

[Technical Field]

[0001] The present invention relates to a shipping packaging box. [Background technology]

[0002] Patent Document 1 discloses a transport packaging box (transport container) that has a box body formed into a box shape by appropriately folding a sheet-like member, and is used to package and transport various items (e.g., products) by storing them in the box body. Furthermore, some transport packaging boxes have a fixing structure that prevents displacement of the items inside the box body from the viewpoint of protecting the items contained in the box body during transport. Conventional fixing structures include a storage member that is arranged inside the box body so as not to move in a predetermined direction and has a storage recess into which the items are placed, and a padding member such as a sponge that is formed elastically deformable and is filled in the gap between the inner surface of the storage recess of the storage member and the items. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2004-26231 Summary of the Invention [Problem to be solved by the invention]

[0004] However, it is not preferable from the viewpoint of environmental friendliness and cost / disposal method that the fixing structure be made up of a plurality of members (accommodating member and filling member).

[0005] An object of the present invention is to provide a packaging box for transport in which a fixing structure for preventing displacement of an article inside the box body can be formed by a single member. [Means for solving the problem]

[0006] One aspect of the present invention is a transport packaging box comprising: a box body having a bottom plate portion and a peripheral wall portion rising from the periphery of the bottom plate portion; and a fixed structural member made of a foldable sheet material and having a first surface facing one side in the thickness direction and a second surface facing the opposite side to the first surface, the fixed structural member having a bottom plate portion and a pair of fixing plate portions arranged to sandwich the bottom plate portion and each connected to the bottom plate portion in a foldable manner. Between the bottom plate portion and the pair of fixing plate portions, a first fold line is formed extending in the width direction perpendicular to the longitudinal direction in which the bottom plate portion and the pair of fixing plate portions are aligned along the first surface. Each fixing plate portion has a second fold line formed in the longitudinal direction that divides the fixing plate portion into a first support plate portion, a contact plate portion, and a second support plate portion, which are arranged in order from the bottom plate portion side. The second fold line has an annular fold line portion located midway through the fixing plate portion in the width direction, surrounding the contact plate portion and separating the first support plate portion from the second support plate portion, and a straight fold line portion extending in a straight line from both ends of the annular fold line portion in the width direction to both ends of the fixing plate portion, separating the first support plate portion from the second support plate portion. With the fixing structural member housed inside the box body, the bottom plate portion is placed on top of the bottom plate portion, and then each first support plate portion of the pair of fixing plate portions is folded back onto the bottom plate portion so that the first fold line becomes a valley fold line when viewed from the first surface side, and each second support plate portion is folded back onto each first support plate portion so that the second fold line becomes a mountain fold line when viewed from the first surface side, so that the contact plate portions of the pair of fixing plate portions have concave contact surfaces that face each other in the direction in which the pair of fixing plate portions are aligned when viewed from the first surface side of the bottom plate portion. [Effects of the Invention]

[0007] According to the present invention, it is possible to provide a packaging box for transport in which a fixing structure for preventing displacement of an article inside the box body can be configured with a single member. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a perspective view of a transport packaging box according to an embodiment of the present invention. [Figure 2] 2 is a perspective view of the transport packaging box of FIG. 1, separated into a box body and a fixing structural member. FIG. [Figure 3] FIG. 3 is a plan view of the box body of FIGS. 1 and 2 in an expanded state. [Figure 4] FIG. 3 is a plan view showing the fixing structure member of FIGS. 1 and 2 in an expanded state. [Figure 5] FIG. 5 is a diagram showing a main part of FIG. 4. [Figure 6] 10A and 10B are cross-sectional views illustrating a process of fixing an article contained inside a box body by a fixing structural member in a transport packaging box according to one embodiment of the present invention. [Figure 7] FIG. 7 is a cross-sectional view following FIG. 6, showing the state in which the articles stored inside the box body are fixed by the fixing structural members. [Figure 8] FIG. 8 is a top view of FIG. 7 as seen from the D100 direction. [Figure 9] 10A and 10B are diagrams showing a first modified example of a slit formed in a fixing plate portion of a fixing structure member. [Figure 10] 10A and 10B are diagrams showing a second modified example of a slit formed in a fixing plate portion of a fixing structural member. DETAILED DESCRIPTION OF THE INVENTION

[0009] An embodiment of the present invention will be described with reference to FIGS. As shown in FIGS. 1 and 2, a transport packaging box 1 of this embodiment has a box body 2 and a fixing structural member 3.

[0010] The box body 2 is formed in a box shape having a space (internal space 20) capable of accommodating an article 7 (see FIGS. 6 and 7) therein. The box body 2 has a bottom plate portion 21, a peripheral wall portion 22, and a lid portion 23. The shape of the bottom plate portion 21 in a plan view from the thickness direction of the bottom plate portion 21 may be any shape such as a polygonal shape, a circular shape, etc. In this embodiment, the shape of the bottom plate portion 21 in a plan view is rectangular.

[0011] The peripheral wall portion 22 is formed in a cylindrical shape rising from the peripheral edge of the bottom plate portion 21. Therefore, when viewed in the axial direction, the cylindrical peripheral wall portion 22 has a shape that corresponds to the shape of the bottom plate portion 21 in a plan view. In this embodiment, the peripheral wall portion 22 has a rectangular shape when viewed in the axial direction, that is, is formed in a square cylindrical shape.

[0012] The rectangular cylindrical peripheral wall 22 is configured by arranging four side plates 24, each formed as a rectangular plate in a plan view, in the circumferential direction of the peripheral wall 22. In the following description, of the four side plates 24, two predetermined side plates 24 arranged at an interval in the thickness direction of the side plates 24 are referred to as first side plates 241, and the remaining two side plates 24 are referred to as second side plates 242. The two second side plates 242 are arranged at an interval in the thickness direction. The direction in which the two second side plates 242 are arranged is perpendicular to the direction in which the two first side plates 241 are arranged.

[0013] The box body 2 is formed into a box shape that opens in one direction by the above-mentioned bottom plate portion 21 and peripheral wall portion 22. The opening of the box body 2 is located at the tip of the peripheral wall portion 22 that rises from the bottom plate portion 21. In the following description, the direction in which the box main body 2 opens will be referred to as the opening direction D5. Also, in the following description, the direction in which the side connected to the first side plate portion 241 of the rectangular bottom plate portion 21 extends will be referred to as the longitudinal direction D11 of the box main body 2 and bottom plate portion 21, and the direction in which the side connected to the second side plate portion 242 extends will be referred to as the width direction D12 of the box main body 2 and bottom plate portion 21. The opening direction D5 of the box body 2 is perpendicular to the longitudinal direction D11 and width direction D12 of the box body 2 and the bottom plate portion 21, and corresponds to the axial direction of the peripheral wall portion 22 described above.

[0014] The lid portion 23 closes the opening of the box main body 2 so as to be able to open and close freely. The lid portion 23 is connected to a circumferential portion of the tip of the peripheral wall portion 22 rising from the bottom plate portion 21 in a manner that allows it to be bent. The lid portion 23 is formed to have the same shape and size as the bottom plate portion 21 (the opening of the box main body 2) in a plan view. That is, the lid portion 23 of this embodiment is formed in the shape of a rectangular plate in a plan view. Furthermore, one side of the lid portion 23, which is rectangular in a plan view, is connected to one first side plate portion 241 in a manner that allows it to be bent.

[0015] 2, in the box body 2 of this embodiment, an insertion piece 25 is connected to the tip of the lid portion 23 extending from the peripheral wall portion 22. The insertion piece 25 is bendable relative to the lid portion 23. The insertion piece 25 is inserted into the inside of the opening of the box body 2 when the opening of the box body 2 is covered with the lid portion 23.

[0016] In the box body 2 of this embodiment, a restricting flap 26 is connected to the tip of each of the two second side plate portions 242. Each restricting flap 26 is bendable relative to the second side plate portion 242. By arranging the restricting flap 26 so that it overlaps the opening of the box body 2 when the opening of the box body 2 is covered by the lid portion 23, it is possible to suppress or prevent the lid portion 23 from entering inside the box body 2. Furthermore, by arranging the restricting flap 26 so that it overlaps the opening of the box body 2 when the opening of the box body 2 is covered by the lid portion 23, it is possible to sandwich the insertion piece 25 inserted inside the opening of the box body 2 between the restricting flap 26 and the peripheral wall portion 22 (first side plate portion 241). This allows the lid portion 23 to be held in a position that covers the opening of the box body 2.

[0017] 1 and 2, the box body 2 of this embodiment is formed with a window 27. The window 27 penetrates the wall of the box body 2, allowing the items 7 stored inside the box body 2 to be viewed from the outside. In FIGS. 1 and 2, the window 27 is formed across the lid 23 and one first side plate 241 connected to the lid 23.

[0018] The box body 2 of this embodiment is formed into the box shape shown in Figures 1 and 2 by appropriately folding and adhering a foldable sheet material 2S (hereinafter referred to as box sheet material 2S) shown in Figure 3. In the box sheet material 2S (unfolded box body 2) shown in Figure 3, four side plate portions 24 are aligned in a predetermined linear direction. In the following description, the linear direction in which the four side plate portions 24 of the box sheet material 2S are aligned is referred to as the first direction D21. The direction perpendicular to the first direction D21 is referred to as the second direction D22. The direction perpendicular to the first direction D21 and the second direction D22 is the thickness direction of the sheet-like box sheet material 2S.

[0019] In the box sheet material 2S, the lid portion 23 is foldably connected to one side in the second direction D22 of one first side plate portion 241. Also, the restricting flaps 26 are foldably connected to one side in the second direction D22 of each of the two second side plate portions 242. Furthermore, the adhesive portion 28 is foldably connected to the side plate portion 24 located at one end in the first direction D21 (the first side plate portion 241 located at the left end in FIG. 3). When assembling the four side plate portions 24 into the cylindrical peripheral wall portion 22, the adhesive portion 28 is adhered to the side plate portion 24 located at the other end in the first direction D21 (the second side plate portion 242 located at the right end in FIG. 3), thereby foldably connecting the two side plate portions 24 located at both ends in the first direction D21. Furthermore, on the other side of the four side plate portions 24 in the second direction D22, bottom flaps 211, 212 corresponding to the bottom plate portion 21 (see FIG. 2) of the assembled box main body 2 are connected in a manner that allows them to be folded relative to the side plate portions 24. These four bottom flaps 211, 212 are appropriately overlapped when assembling the box main body 2 to form the bottom plate portion 21.

[0020] The box sheet material 2S shown in Fig. 3 is viewed from the inside surface of the assembled box body 2. Therefore, in Fig. 3, the fold lines L21, L22, L23, L24, L25, and L26 formed in each part of the box sheet material 2S are all valley fold lines. The box body 2 made of the box sheet material 2S can be in a state where it has an internal space 20 as shown in FIG. 2, or can be in a state where it is folded into a plate shape. The arrangement of the components of the box body 2 (four side plate portions 24, lid portion 23, bottom plate portion 21) in the above-mentioned box sheet material 2S and the configuration of the bottom plate portion 21 are not limited to the example shown in Figure 3 and may be any.

[0021] The box body 2 of this embodiment configured as described above is made of a foldable cardboard sheet. The cardboard sheet is made by laminating sheet-like liners on both sides of a corrugated core. The box body 2 may be made of any foldable sheet, such as cardboard or a plastic sheet.

[0022] As shown in FIG. 7, the fixing structural member 3 is a member that is housed inside the box body 2 and prevents the article 7 from shifting position inside the box body 2. 2 and 4, the fixing structural member 3 is made of a foldable sheet material and has a first surface 3a facing one side in the thickness direction and a second surface 3b facing the opposite side to the first surface 3a. Fig. 4 shows a plan view of the fixing structural member 3 unfolded into a flat sheet as seen from the first surface 3a side.

[0023] The fixing structure member 3 has a bottom plate portion 31, a pair of fixing plates 32, and a pair of side plate portions 37. In the fixing structure member 3, the fixing plates 32 and the side plate portions 37 are arranged in order on both sides of the side plate portion 37. The bottom plate portion 31, the pair of fixing plates 32, and the pair of side plate portions 37 are arranged in a predetermined linear direction. In the following explanation, the direction in which the bottom plate portion 31, the pair of fixing plates 32, and the pair of side plate portions 37 are arranged is referred to as the longitudinal direction D1. Furthermore, the direction perpendicular to the longitudinal direction D1 along the first surface 3a of the fixing structure member 3 is referred to as the width direction D2.

[0024] When the fixing structural member 3 is housed inside the box body 2, the bottom plate portion 31 is disposed so as to overlap the bottom plate portion 21 of the box body 2 (see FIGS. 6 and 7). The bottom plate portion 31 of this embodiment is formed in a rectangular shape when viewed in the thickness direction.

[0025] In this embodiment, the dimension (width dimension) of the bottom panel 31 in the width direction D2 is approximately equal to the width dimension of the bottom panel 21 of the box body 2, that is, approximately equal to the distance between the two first side panels 241 lined up in the width direction D12. The width dimension of the bottom panel 31 being approximately equal to the distance between the two first side panels 241 means that the width dimension is equal to the distance between the two first side panels 241 or is slightly smaller than the distance between the two first side panels 241. As a result, when the bottom panel 31 is placed on the bottom panel 21 so that the width direction D2 of the bottom panel 31 coincides with the width direction D12 of the bottom panel 21, the bottom panel 31 restricts movement of the bottom panel 31 in the width direction D2 relative to the bottom panel 21. On the other hand, the dimension in the longitudinal direction D1 (longitudinal dimension) of the bottom plate portion 31 is smaller than the longitudinal dimension of the bottom plate portion 21 of the box body 2, that is, smaller than the distance between the two second side plate portions 242 lined up in the longitudinal direction D11. Therefore, when the bottom plate portion 31 is placed on the bottom plate portion 21 so that the width direction D2 of the bottom plate portion 31 coincides with the width direction D12 of the bottom plate portion 21, the bottom plate portion 31 does not restrict movement of the bottom plate portion 31 relative to the bottom plate portion 21 in the longitudinal direction D1.

[0026] 4, the pair of fixing plates 32 are arranged to sandwich the bottom plate 31 in the longitudinal direction D1. A first fold line L31 extending in the width direction D2 is formed between each fixing plate 32 and the bottom plate 31. As a result, each fixing plate 32 is connected to the bottom plate 31 in a manner that allows it to be folded.

[0027] 4 and 5, each fixing plate 32 includes a first support plate 33, a contact plate 34, and a second support plate 35, which are arranged in this order from the bottom plate 31 side in the longitudinal direction D1. A second fold line L32 is formed in each fixing plate 32, dividing the fixing plate 32 into the first support plate 33, the contact plate 34, and the second support plate 35. As shown in FIG. 5, the second fold line L32 has a circular fold line portion L321 and two straight fold line portions L322.

[0028] The annular fold line L321 is located midway through the fixing plate 32 in the width direction D2 and surrounds the contact plate 34, thereby separating the contact plate 34 from the first support plate 33 and the second support plate 35. The shape of the annular fold line L321 in a plan view as viewed from the thickness direction of the fixing plate 32 may be any shape, but it is preferable that the width dimension is greater than the length dimension. The annular fold line L321 shown in Figures 4 and 5 is hexagonal in plan view, with the width dimension being greater than the length dimension, but may be any shape other than a hexagon, such as an ellipse, a circle, or the like.

[0029] The second fold line L32 further has two auxiliary fold line portions L323 extending in the longitudinal direction D1 inside the annular fold line portion L321. The two auxiliary fold line portions L323 are spaced apart in the width direction D2 and divide the contact plate portion 34 into three regions aligned in the width direction D2.

[0030] The straight fold line portions L322 extend linearly in the width direction D2 from both ends of the annular fold line portion L321 in the width direction D2 to both ends of the fixing plate portion 32, and separate the first support plate portion 33 and the second support plate portion 35. From the above, the first support plate portion 33 and the second support plate portion 35 are separated by a ring-shaped fold line portion L321 in the middle portion in the width direction D2, and by two straight fold line portions L322 at both ends in the width direction D2.

[0031] 4 and 5, which show the fixing structure member 3 viewed from the first surface 3a side, the first fold line L31 is a valley fold line, and the second fold line L32 is a mountain fold line. When the second fold line L32 of the fixing plate portion 32 is mountain-folded as viewed from the first surface 3a, a concave contact surface 341 (see FIGS. 2 and 8) is formed on the first surface 3a of the contact plate portion 34. Note that the contact surface 341 can be easily formed into a concave shape by folding the second fold line L32 at the auxiliary fold line portion L323.

[0032] In this embodiment, the second fold line L32 is located closer to the bottom plate 31 than the middle of the fixing plate 32 in the longitudinal direction D1. Therefore, the dimension (longitudinal dimension) of the first support plate 33 in the longitudinal direction D1 is smaller than the longitudinal dimension of the second support plate 35. Note that the second fold line L32 may be located, for example, in the middle of the fixing plate 32 in the longitudinal direction D1, or may be located farther from the bottom plate 31 than the middle.

[0033] As shown in Figures 4 and 5, a slit 36 ​​is formed in the fixing plate 32. The slit 36 ​​penetrates the fixing plate 32 in the thickness direction and is formed linearly extending at least in the width direction D2 of the fixing plate 32, not reaching both ends. The slit 36 ​​in this embodiment is formed intermittently in the longitudinal direction. In other words, the slit 36 ​​is formed by arranging a plurality of linear cut lines 361 penetrating the fixing plate 32 in the thickness direction at intervals in the longitudinal direction. As shown in Figure 5, the slits 36 in this embodiment include a first slit 36A formed in the first support plate portion 33, a second slit 36B formed in the second support plate portion 35, and a third slit 36C formed in the contact plate portion 34.

[0034] In this embodiment, the first slit 36A and the second slit 36B are each formed in an arc shape with the contact plate 34 as the center when viewed in a plan view from the thickness direction of the fixing plate 32. In FIG. 5, both ends of the first and second slits 36A and 36B formed in an arc shape reach the contact plate 34 (annular fold line L321). Note that both ends of some of the first and second slits 36A and 36B may reach, for example, the straight fold line L322. In FIG. 5, the first slit 36A and the second slit 36B are each formed in a U-shape with two rounded corners. Furthermore, the combined shape of the first slit 36A and the second slit 36B is a rectangle with four rounded corners.

[0035] 5, the first and second slits 36A, 36B are formed in an arc shape based on the center of the contact plate portion 34. Therefore, the combined shape of the first slit 36A and the second slit 36B is a rounded rectangle based on the center of the contact plate portion 34. In other words, the first slit 36A and the second slit 36B are shaped symmetrically with respect to the straight fold line portion L322 of the second fold line L32.

[0036] A plurality of first and second slits 36A and 36B are formed in the first and second support plate portions 33 and 35, respectively. In Fig. 5, the first and second slits 36A and 36B are formed in multiple arc-shaped configurations. The distance between adjacent first slits 36A and the distance between adjacent second slits 36B are preferably, for example, 15 mm to 20 mm. In this embodiment, the number of first slits 36A and the number of second slits 36B are equal.

[0037] 5, some of the first and second slits 36A, 36B extend to the area of ​​the contact plate portion 34. However, the first and second slits 36A, 36B that enter the contact plate portion 34 do not penetrate the contact plate portion 34 in the longitudinal direction D1.

[0038] 5, the third slit 36C formed in the contact plate portion 34 extends along the edge of the contact plate portion 34 (on the annular folding line portion L321) and inside the contact plate portion 34. Like the first and second slits 36A and 36B described above, the third slit 36C does not penetrate the contact plate portion 34 in the longitudinal direction D1. In addition, the third slit 36C in Figure 5 has a rectangular shape with rounded corners, and is located inside the rectangular shape of the first slit 36A and the second slit 36B, which also have rounded corners.

[0039] 4, the side plate 37 is disposed at the tip of each fixing plate 32 in the longitudinal direction D1. A third fold line L33 extending in the width direction D2 is formed between the fixing plate 32 and the side plate 37. This allows the side plate 37 to be connected to the fixing plate 32 in a foldable manner.

[0040] Each side panel 37 has a gripping portion 371 for gripping the side panel 37 with the hand of a worker handling the transport packaging box 1. The specific configuration of the gripping portion 371 may be arbitrary. In the illustrated example, the gripping portion 371 is a through-hole that penetrates the side panel 37 in its thickness direction.

[0041] 2 and 8, the transport packaging box 1 of this embodiment further includes a movement restriction structure 4 that restricts movement of the bottom plate portion 31 relative to the bottom plate portion 21 in directions along the first surface 3a of the bottom plate portion 31 (longitudinal direction D11 and width direction D12 of the bottom plate portion 21) when at least the bottom plate portion 31 is arranged overlapping the bottom plate portion 21 of the box body 2. The specific configuration of the movement restriction structure 4 may be arbitrary. As shown in Figures 2, 4, and 8, the movement restriction structure 4 of this embodiment is composed of a bottom plate portion 31 that is rectangular in plan view, and a pair of restriction plate portions 38 that are connected to the bottom plate portion 31 in a manner that allows them to be bent. In the movement restricting structure 4, the bottom plate portion 31 serves to restrict movement of the bottom plate portion 31 relative to the bottom plate portion 21 in the width direction D2, as described above.

[0042] The pair of restricting plates 38 are arranged to sandwich the bottom plate 31 in the width direction D2. A fourth fold line L34 extending in the longitudinal direction D1 is formed between each restricting plate 38 and the bottom plate 31. As a result, each restricting plate 38 is connected to the bottom plate 31 in a manner that allows it to be folded. The longitudinal dimension of each regulating plate portion 38 is approximately equal to the longitudinal dimension of the bottom plate portion 21 of the box main body 2, that is, approximately equal to the distance between the two second side plate portions 242 aligned in the longitudinal direction D11. The longitudinal dimension of each regulating plate portion 38 being approximately equal to the distance between the two second side plate portions 242 means that the longitudinal dimension is equal to the distance between the two second side plate portions 242 or is slightly smaller than the distance between the two second side plate portions 242.

[0043] With the bottom plate 31 overlapped on the bottom plate 21 so that the width direction D2 of the bottom plate 31 coincides with the width direction D12 of the bottom plate 21, the pair of restricting plates 38 are bent relative to the bottom plate 31 and arranged overlapping inside the pair of first side plates 241. In this state, the pair of restricting plates 38 are arranged between the two second side plates 242 of the box body 2 that are aligned in the longitudinal direction D11 so that the longitudinal direction D1 of the pair of restricting plates 38 coincides with the longitudinal direction D11 of the bottom plate 21. This restricts movement of the bottom plate 31 in the longitudinal direction D1 relative to the bottom plate 21. In other words, the pair of restricting plates 38 play a role in restricting movement of the bottom plate 31 in the longitudinal direction D1 relative to the bottom plate 21 in the movement restricting structure 4.

[0044] 4, which shows the fixing structural member 3 viewed from the first surface 3a side, the fourth fold line L34 between the bottom plate 31 and each of the restricting plates 38 is a valley fold line. Therefore, as shown in FIG. 2, the pair of restricting plates 38 are folded toward the first surface 3a of the bottom plate 31. As a result, when the bottom plate 31 is inserted into the box main body 2 with the second surface 3b of the bottom plate 31 facing the bottom plate 21 of the box main body 2, the pair of restricting plates 38 can also be easily inserted into the box main body 2.

[0045] The fixing structural member 3 of this embodiment configured as described above is made of the same cardboard sheet as the box body 2, that is, it is made of the same material as the box body 2. Note that the fixing structural member 3 may be made of any sheet that can at least be folded, such as cardboard or a plastic sheet.

[0046] Next, a mode of accommodating the above-mentioned fixing structural member 3 in the box body 2 will be described mainly with reference to FIGS. As shown in FIG. 7 , when the fixing structural member 3 is housed inside the box main body 2, the bottom plate 31 is disposed so as to overlap the bottom plate 21 of the box main body 2. Furthermore, when viewed from the first surface 3 a of the fixing structural member 3, each of the first support plate portions 33 of the pair of fixing plates 32 is folded back relative to the bottom plate portion 31 so that the first fold line L31 becomes a valley fold line. Furthermore, when viewed from the first surface 3 a of the fixing structural member 3, each of the second support plate portions 35 is folded back relative to the first support plate portion 33 so that the second fold line L32 becomes a mountain fold line. As a result, the tips of the second support plate portions 35 of the pair of fixing plates 32 in the longitudinal direction D1 of the fixing structural member 3 (the ends of the second support plate portions 35 corresponding to the third fold line L33) are supported by the two second side plate portions 242 that form the inner surface of the peripheral wall 22.

[0047] 7 and 8, in this state, a concave contact surface 341 is formed on each contact plate portion 34 of the pair of fixing plates 32. The contact surfaces 341 of the pair of contact plates 34 face each other in the direction in which the pair of fixing plates 32 are lined up (longitudinal direction D1) when viewed from the first surface 3a side of the bottom plate portion 31. 7, the internal space 20 of the box body 2 includes a clamping space 201 located between the pair of contact plate portions 34 in the longitudinal directions D11, D1, and an adjacent space 202 located adjacent to the clamping space 201 on the opening side of the box body 2 in the opening direction D5. The longitudinal dimension of the adjacent space 202 is greater than the longitudinal dimension of the clamping space 201.

[0048] Furthermore, in the state where the fixing structural member 3 is housed inside the box main body 2 as described above, each side surface plate portion 37 is folded relative to each second support plate portion 35 and arranged to overlap the inner surface of each second side plate portion 242 (peripheral wall portion 22) so that the third fold line L33 becomes a valley fold line when viewed from the first surface 3a side of the fixing structural member 3. Furthermore, the folding angles at the first to third fold lines L31 to L33 are set so that the side surface plate portion 37 overlapping the inner surface of the second side plate portion 242 does not protrude outward from the opening of the box main body 2.

[0049] The fixed structural member 3 can then be housed inside the box body 2 through the process described below. As shown in FIG. 6, first, the bottom plate 31 of the fixing structural member 3 is placed on the bottom plate 21 of the box body 2, and each side plate 37 is placed on the inner surface of each second side plate 242. Next, each side plate 37 is slid relative to the inner surface of each second side plate 242 in the opening direction D5 (the axial direction of the peripheral wall 22) toward the bottom plate 21 (see arrow D31 in FIG. 6). This allows each first support plate 33 of the pair of fixing plates 32 to be folded back relative to the bottom plate 31 as shown by arrow D32, and each second support plate 35 to be folded back relative to each first support plate 33 as shown by arrow D33. Then, the pair of contact plates 34 can be brought closer to each other in the longitudinal directions D11 and D1 as shown by arrow D34.

[0050] As a result, as shown in Figure 6, when the bottom plate portion 31 of the fixed structural member 3 is overlapped on the bottom plate portion 21 of the box main body 2 and each side plate portion 37 is overlapped on the inner surface of each second side plate portion 242 and an item 7 is placed on the bottom plate portion 31, the item 7 can be sandwiched between the pair of contact plate portions 34 as shown in Figures 7 and 8 by simply sliding the pair of side plate portions 37 against the inner surface of the second side plate portion 242 in the opening direction D5 (axial direction of the peripheral wall portion 22) and moving it in the direction indicated by arrow D31. On the other hand, to release the article 7 from the state shown in FIG. 7 by the pair of contact plates 34, the pair of side plate portions 37 should be moved in the direction opposite to the arrow D31.

[0051] 7, the transport packaging box 1 of this embodiment further includes a holding structure 5 that holds the position of the second support plate portion 35 so that the concave contact surfaces 341 face each other in the direction in which the pair of fixing plate portions 32 are aligned (longitudinal directions D11, D1) when viewed from the first surface 3a side of the bottom plate portion 31. The specific structure of the holding structure 5 may be any desired one. The holding structure 5 of this embodiment is composed of the lid portion 23 of the box body 2 and a pair of side plate portions 37 of the fixing structural member 3. When the lid portion 23 is positioned to cover the opening of the box body 2, the lid portion 23 prevents the pair of side plate portions 37 from moving outward (in the opening direction D5) from the opening of the box body 2. This maintains the position of the second support plate portion 35 so that the concave contact surfaces 341 face each other in the longitudinal directions D11 and D1.

[0052] As described above, in the transport packaging box 1 of this embodiment, when the fixing structural member 3 is housed in the box main body 2 and folded back appropriately along the first and second fold lines L31 and L32, the leading ends of the second support plate portions 35 of each fixing plate portion 32 are supported by the two second side plate portions 242 (the inner surfaces of the peripheral wall portion 22) of the box main body 2. Therefore, in the state shown in FIGS. 7 and 8 , the pair of contact plate portions 34 of the fixing structural member 3 can be inhibited or prevented from separating from each other. The article 7 can be sandwiched between the concave contact surfaces 341 of the pair of contact plate portions 34. In this state, as shown in FIG. 8 , the article 7 is surrounded by the pair of concave contact surfaces 341, preventing the article 7 from moving in the planar direction (longitudinal directions D11 and D1 and width directions D12 and D2) of the bottom plate portion 31 (bottom plate portion 21). That is, displacement of the article 7 inside the box main body 2 can be prevented. Furthermore, the fixing structure for preventing displacement of the article 7 inside the box body 2 is formed by a single fixing structural member 3, which is advantageous from the viewpoints of environmental friendliness and cost-effective disposal methods.

[0053] Furthermore, in the transport packaging box 1 of this embodiment, the slits 36 are formed in the second support plate portions 35. Therefore, the second support plate portions 35 can be elastically deformed with the article 7 sandwiched between the pair of contact plate portions 34. As a result, even if an external force acts on the box body 2, the second support plate portions 35 can be elastically deformed to prevent the external force from reaching the article 7. In other words, the cushioning properties of the transport packaging box 1 can be ensured, and the article 7 can be protected. Furthermore, even without changing the size of each part of the fixing structural member 3 or the shapes and dimensions of the first folding line L31 and the second folding line L32, the second support plate portion 35 can elastically deform, allowing articles 7 of various sizes to be sandwiched between the pair of contact plate portions 34. In other words, the versatility of the fixing structural member 3 can be improved.

[0054] Furthermore, in the transport packaging box 1 of this embodiment, the slits 36 are also formed in the first support plate portions 33. Therefore, with the article 7 sandwiched between the pair of contact plate portions 34, the first support plate portions 33 can also be elastically deformed in the same manner as the second support plate portions 35. This can further improve the cushioning properties of the transport packaging box 1 and the versatility of the fixing structural member 3.

[0055] Furthermore, in the transport packaging box 1 of this embodiment, when viewed in the thickness direction of the fixing plate 32, the slit 36 ​​is formed in an arc shape with the contact plate 34 as the center. Therefore, the arc-shaped slit 36 ​​has a shape corresponding to the concave contact surface 341 of the contact plate 34 (see FIG. 8). This allows the first support plate 33 and the second support plate 35 to elastically deform more effectively when the article 7 is sandwiched between the concave contact surfaces 341 of the pair of contact plates 34. This can further improve the cushioning properties of the transport packaging box 1 and the versatility of the fixing structural member 3.

[0056] In addition, in the fixing structural plate of this embodiment, the slits 36 formed in the fixing plate 32 are formed in an arc shape with corners by connecting multiple straight lines, but the corners are rounded. The rounded corners of the slits 36 effectively prevent the fixing plate 32 from tearing at the corners of the slits 36, even if the fixing structural member 3 is made of a paper material such as cardboard.

[0057] Furthermore, in the transport packaging box 1 of this embodiment, a plurality of slits 36 are formed in the first support plate portion 33 and the second support plate portion 35. This allows the first support plate portion 33 and the second support plate portion 35 to be elastically deformed more effectively when the article 7 is sandwiched between the concave contact surfaces 341 of the pair of contact plate portions 34. This can further improve the cushioning properties of the transport packaging box 1 and the versatility of the fixing structural member 3.

[0058] Furthermore, in the transport packaging box 1 of this embodiment, the spacing between adjacent slits 36 in the fixing plate portion 32 is set to 15 mm to 20 mm. This effectively prevents the fixing plate portion 32 from tearing, even if the fixing structural member 3 is made of a paper material such as cardboard. Furthermore, it is possible to cause the first support plate portion 33 and the second support plate portion 35, in which the multiple slits 36 are formed, to bend like a spring. In other words, it is possible to cause the first support plate portion 33 and the second support plate portion 35 to bend elastically and significantly. This further improves the cushioning properties and versatility of the transport packaging box 1.

[0059] Furthermore, in the transport packaging box 1 of this embodiment, the fixing structural member 3 further includes a pair of side plate portions 37 foldably connected to the tip ends of the fixing plate portions 32 in the longitudinal direction D1. As a result, as shown in FIGS. 6 and 7 , by simply sliding the pair of side plate portions 37 of the fixing structural member 3 relative to the inner surface of the peripheral wall portion 22 in the axial direction of the peripheral wall portion 22 toward the bottom plate portion 21, the first support plate portions 33 of the pair of fixing plate portions 32 can be easily folded back relative to the bottom plate portion 31, and the second support plate portions 35 can be easily folded back relative to the first support plate portions 33. This makes it easy to sandwich the article 7 between the pair of contact plate portions 34. Furthermore, when removing the article 7 from the box body 2, by simply sliding the pair of side plate portions 37 relative to the inner surface of the peripheral wall portion 22 in the axial direction of the peripheral wall portion 22 toward the opening of the box body 2, the sandwiching of the article 7 by the pair of contact plate portions 34 can be easily released.

[0060] Furthermore, in the transport packaging box 1 of this embodiment, the pair of side panel portions 37 each have a grip portion 371. As a result, when sandwiching the article 7 between the pair of contact panel portions 34 or when releasing the sandwiching of the article 7 by the pair of contact panel portions 34, the worker can easily move the pair of side panel portions 37 by gripping the grip portion 371 with their hands.

[0061] The transport packaging box 1 of this embodiment also includes a holding structure 5 that holds the position of the second support plate 35 so that the concave contact surfaces 341 face each other in the direction in which the pair of fixing plate parts 32 are aligned when viewed from the first surface 3a side of the bottom plate part 31. This makes it possible to prevent the article 7 from being unexpectedly released from being sandwiched by the pair of contact plate parts 34.

[0062] Furthermore, the transport packaging box 1 of this embodiment is provided with a movement restriction structure 4 that restricts movement of the bottom plate portion 31 relative to the bottom plate portion 21 in the direction along the first surface 3a when at least the bottom plate portion 31 is placed overlapping the bottom plate portion 21. This allows the first support plate portion 33 to be smoothly folded back relative to the bottom plate portion 31 and the second support plate portion 35 to be smoothly folded back relative to the first support plate portion 33 when the bottom plate portion 31 is placed overlapping the bottom plate portion 21. This makes it easy to sandwich the article 7 between the pair of contact plate portions 34.

[0063] Furthermore, in the transport packaging box 1 of this embodiment, the box body 2 and the fixing structural members 3 are made of the same material. This eliminates the need to separate the box body 2 and the fixing structural members 3 by material when disposing of the transport packaging box 1, making disposal easier.

[0064] Furthermore, in the transport packaging box of this embodiment, when the fixing structural member 3 is housed in the box body 2, an adjacent space 202 that is larger than the clamping space 201 is located inside the box body 2, above the clamping space 201 that holds the item 7. This makes it possible to suitably house a flower arrangement as the item 7 shown in Figures 6 and 7 in the transport packaging box. This point will be explained below. The flower arrangement has a pot 71 and flowers 72 placed above the pot 71. With the pot 71 placed in the clamping space 201 and sandwiched between the pair of contact plates 34, the flowers 72 can be placed in an adjacent space 202 that is larger than the clamping space 201. This reduces or prevents the flowers 72 in the flower arrangement from coming into contact with the inner surface of the box body 2 when the pot 71 of the flower arrangement is sandwiched and fixed between the pair of contact plates 34. In other words, the flowers 72 in the flower arrangement can be effectively protected.

[0065] Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments and can be modified as appropriate within the scope of the invention.

[0066] In the present invention, the combined shape of the first slits 36A and the second slits 36B formed in the fixing plate 32 is not limited to a rectangular shape with rounded corners. The combined shape of the first slits 36A and the second slits 36B may be, for example, a circular shape as shown in Fig. 9. Furthermore, the combined shape of the first slits 36A and the second slits 36B may be, for example, a polygonal shape with rounded corners (triangular, pentagonal, etc.), a polygonal shape without rounded corners, an elliptical shape, etc.

[0067] In the present invention, the first slits 36A and the second slits 36B are not limited to being formed in an arc shape as illustrated in Figures 5 and 9. The first slits 36A and the second slits 36B may be formed in a linear shape extending in the width direction D2, for example, as shown in Figure 10.

[0068] 9 and 10, for example, the number of first slits 36A formed in the first support plate portion 33 may be smaller than the number of second slits 36B formed in the second support plate portion 35. Furthermore, the slits 36 only need to be formed in at least the second support plate portion 35, and may not be formed in, for example, the first support plate portion 33. This is because, when an article 7 is sandwiched between the pair of contact plates 34 inside the box body 2, the second support plate portion 35 is required to deform more than the first support plate portion 33.

[0069] In the present invention, the movement restricting structure 4 may be configured, for example, by a protrusion formed on one of the bottom plate portion 21 of the box body 2 and the bottom plate portion 31 of the fixed structural member 3, and an insertion hole formed on the other of the bottom plate portion 21 and the bottom plate portion 31. In such a configuration, when the bottom plate portion 31 is arranged on top of the bottom plate portion 21, the protrusion can be inserted into the insertion hole, thereby restricting movement of the bottom plate portion 31 relative to the bottom plate portion 21. In the present invention, the movement restricting structure 4 may be configured, for example, by attaching the bottom plate portion 31 of the fixed structural member 3 to the bottom plate portion 21 of the box body 2. In the two examples of movement restriction structures 4 described above, for example, the longitudinal and width dimensions of the bottom panel portion 31 may be smaller than the longitudinal and width dimensions of the bottom panel portion 21 of the box main body 2, that is, may be smaller than the spacing between the two second side panel portions 242 aligned in the longitudinal direction D11 and the spacing between the two first side panel portions 241 aligned in the width direction D12.

[0070] In the present invention, the holding structure 5 may be configured, for example, by an insertion piece formed on the second support plate portion 35 of the fixed structural member 3 and an insertion hole formed on the peripheral wall portion 22 (the first side plate portion 241 and / or the second side plate portion 242) of the box body 2. In such a configuration, by inserting the insertion piece formed on the second support plate portion 35 into the insertion hole formed on the peripheral wall portion 22, the position of the second support plate portion 35 can be held at a predetermined position. Furthermore, the holding structure 5 may be configured, for example, by a locking protrusion protruding from the inner surface of the peripheral wall portion 22. In such a configuration, the second support plate portion 35 is locked by the locking protrusion, thereby making it possible to hold the position of the second support plate portion 35 at a predetermined position.

[0071] In the present invention, the fixing structural member 3 does not have to include, for example, the pair of side plate portions 37. In this case, when the fixing structural member 3 is housed in the box main body 2 as shown in FIG. 7 , the internal space 20 of the box main body 2 has the clamping space 201 but does not have to have the adjacent space 202.

[0072] In the present invention, the box body 2 is not limited to being made of a foldable sheet, but may be formed in a box shape having at least a bottom plate portion 21 and a peripheral wall portion 22 and opening in one direction. [Explanation of symbols]

[0073] 1 Transport packaging box 2 boxes 3 Fixed structural members 3a Front page 3b Second side 4. Movement control structure 5 Retention structure 7 Goods 21 Bottom plate part 22 Peripheral wall section 23 Lid 24 Side plate part 31 Bottom plate part 32 Fixing plate 33 First support plate part 34 Contact plate 35 Second support plate part 36 Slit 36A First slit 36B Second slit 37 Side plate part 38 Regulating plate 341 Contact surface D1: Longitudinal direction of fixed structural member 3 D2 Width direction of fixed structural member 3 D5 Opening direction D11: Longitudinal direction of the box body 2 (bottom plate portion 21) D12 Width direction of the box body 2 (bottom plate portion 21) L31 First fold line L32 Second fold line

Claims

1. a box body having a bottom plate portion and a peripheral wall portion rising from a peripheral edge of the bottom plate portion; a fixed structural member made of a foldable sheet material, the fixed structural member having a first surface facing one side in a thickness direction and a second surface facing the opposite side to the first surface, the fixed structural member having a bottom plate portion and a pair of fixing plate portions arranged to sandwich the bottom plate portion and each connected to the bottom plate portion in a foldable manner; Equipped with Between the bottom plate portion and the pair of fixing plate portions, a first fold line extending in a width direction perpendicular to the longitudinal direction in which the bottom plate portion and the pair of fixing plate portions are arranged along the first surface is formed, Each fixing plate portion has a second fold line formed in the longitudinal direction, which divides the fixing plate portion into a first support plate portion, a contact plate portion, and a second support plate portion arranged in order from the bottom plate portion side, The second fold line is located in the middle of the fixing plate portion in the width direction, and has an annular fold line portion that surrounds the contact plate portion and divides the first support plate portion and the second support plate portion, and a straight fold line portion that extends linearly from both ends of the annular fold line portion to both ends of the fixing plate portion in the width direction and divides the first support plate portion and the second support plate portion, With the fixing structural member accommodated inside the box body, the bottom plate portion is placed on top of the bottom plate portion, and then each first support plate portion of the pair of fixing plate portions is folded back onto the bottom plate portion so that the first fold line becomes a valley fold line when viewed from the first surface side, and each second support plate portion is folded back onto each first support plate portion so that the second fold line becomes a mountain fold line when viewed from the first surface side, A transport packaging box in which the contact plate portions of a pair of fixing plate portions have concave contact surfaces that face each other in the direction in which the pair of fixing plate portions are aligned when viewed from the first surface side of the bottom plate portion.

2. 2. The transport packaging box according to claim 1, wherein a slit is formed in the second support plate portion, the slit penetrating the fixing plate portion in the thickness direction and extending at least in the width direction but not reaching both ends in the width direction.

3. The packaging box for transport according to claim 2, wherein the slit is also formed in the first support plate portion.

4. 4. The packaging box for transport according to claim 2, wherein the slit is formed in an arc shape with the contact plate portion as a center portion when viewed from the thickness direction.

5. The packaging box for transport according to claim 2 or 3, wherein a plurality of the slits are formed in the second support plate portion.

6. the fixing structure member further includes a side plate portion bendably connected to a tip end of each fixing plate portion in the longitudinal direction, A third fold line extending in the width direction is formed between the fixing plate portion and the side plate portion, 4. The transport packaging box according to claim 1, wherein, with the fixing structural member housed inside the box body, the bottom panel is placed on top of the bottom panel, and the side panel is slid against the inner surface of the peripheral wall in the axial direction of the peripheral wall so that the third fold line becomes a valley fold line when viewed from the first surface side, thereby folding back each of the first support panel portions of the pair of fixing panel portions against the bottom panel portion and folding back each of the second support panel portions against each of the first support panel portions.

7. 4. The transport packaging box according to claim 1, further comprising a holding structure for holding the position of the second support plate portion so that the concave contact surfaces face each other in the direction in which the pair of fixing plate portions are aligned when viewed from the first surface side of the bottom plate portion.

8. 4. A transport packaging box as described in any one of claims 1 to 3, which is provided with a movement restriction structure that restricts movement of the bottom panel portion relative to the bottom panel portion in a direction along the first surface, at least when the bottom panel portion is positioned overlapping the bottom panel portion.

9. The transport packaging box according to any one of claims 1 to 3, wherein the box body and the fixing structural member are made of the same material.

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