JP6593151B2 - Packing material - Google Patents

Description

  The present invention relates to a packaging material, and more particularly to a packaging material for packaging a thin plate material such as a circuit board on which electronic components are mounted.

  Generally, in order to pack electrical equipment, for example, as described in Patent Document 1, a corrugated cardboard packaging box and a packaging material made of corrugated cardboard for holding the electrical equipment inside the packaging box are used. It has been. In the case of a corrugated packaging material, a punching die is moved in the vertical direction so that a folding line is formed at a predetermined position or punched into a predetermined shape. As is well known, a corrugated cardboard is a composite material in which a core formed so as to have a corrugated cross section is reinforced with a liner from above and below, and even the thinnest has a thickness of about 1 mm, generally about 3 to 5 mm. Have. Further, since the cutting conditions change depending on which part of the core formed in a corrugated shape by the blade attached to the punching die, it is impossible to punch holes or narrow slits smaller than a certain dimension (for example, 3 mm).

  On the other hand, the electrical equipment housed in the outer box and sold includes parts that are not fixed inside the casing, such as a circuit board on which electronic parts are mounted. The thickness of the circuit board is generally about 1 to 2 mm. In Patent Document 1, an engagement hole larger than the thickness of the circuit board is formed on the side wall of the packaging material, and a gap between the engagement hole and the circuit board is filled with a resin cushioning material or the like that wraps the circuit board.

  On the other hand, as shown in FIG. 5, the most basic conventional packing material 110 has a plurality of cardboard pieces on a base material (made of cardboard) 111 having a width substantially equal to the inner height of the exterior box 100, for example. The two blocks 112 bonded together with an adhesive in the thickness direction (left and right direction in the figure) are further bonded together with a gap 113 corresponding to the thickness of the circuit board 101. When storing the circuit board 101, the two packaging materials 110 are used to insert both ends of the circuit board 101 into the gap 113 so that the circuit board 101 is substantially horizontal and the base material 111 is substantially vertical. 100 is housed inside.

  Such a conventional packing material 110 can be applied to circuit boards having various thicknesses by adjusting the bonding position of the block 112, but the manufacturing process is complicated and the manufacturing cost increases. Furthermore, unlike the exterior box, since it cannot be folded after unpacking, there is a problem that the packing material 110 is put into the trash box as it is and is not easily recycled.

  Therefore, the present applicant has proposed an improved conventional packaging material 120 as shown in FIGS. 6 to 9 in order to solve the problems of the conventional packaging material 110. 6 is a perspective view showing the configuration of the packing material 120, FIG. 7 is a development view of the packing material 120, and FIGS. 8 and 9 are drawings showing the packing material 120 in the outer box 100 while holding an object to be packed (circuit board 101). It is a figure which shows the procedure to store.

  The packaging material 120 is formed by bending a single cardboard and has a substantially H-shaped cross section when viewed from the front, as shown in FIGS. FIG. 7 is a development view seen from the direction of arrow A (back side), where the solid line is a complete cut line, the thick broken line is a half cut line (mountain fold line) from the front side, and the thin broken line is a half cut line (valley fold line from the back side) ). First, the first side wall 122 is bent with respect to the base portion 121 along the valley fold line 121a so as to be substantially vertical. Next, the second side wall 123 is bent along the mountain fold line 122 a so as to substantially overlap the first side wall 122. Further, the third side wall 124 is bent toward the first side wall 122 so as to substantially overlap the second side wall 123 along the mountain fold line 123a. The other side wall is bent in the same manner. Then, as shown in FIGS. 6, 8, and 9, the packaging material 120 having a substantially H-shaped front section is completed. One end of the first side wall 122 is located on the inner side of the third side wall 124 and functions as a stopper 125 when the circuit board 101 is inserted into a slit 126 described later.

  As can be seen from FIGS. 6, 8, and 9, the upper end surface 122 b near the center of the first side wall 122 protrudes above the upper surface (or valley fold line 121 a) of the base 121, It faces the lower end surface 124a. In the height direction (left-right direction in FIG. 7), the height of the first side wall 122 (the dimension from the valley fold line 122a to the upper end surface 122b near the center of the first side wall 122) is H1, and the height of the second side wall 123 Assuming that (the dimension from the mountain fold line 122a to the mountain fold line 123a) is H2, and the height of the third side wall 124 (the dimension from the mountain fold line 123a to the lower end surface 124a of the third side wall 124) is H3, The width St of the slit 126 formed between the end surface 122b and the lower end surface 124a of the third side wall 124 is represented by St = H2- (H1 + H3). By appropriately selecting the dimensions of the first side wall 122, the second side wall 123, and the third side wall 124, it is possible to form the slit 126 having a width St substantially the same as the thickness of the circuit board 101.

  When the circuit board 101 is stored in the exterior box 100 using the packing material 120, the circuit board 101 is inserted into the slit 126 in parallel with the slit 126 from the side opposite to the stopper 125, as shown in FIG. 6. At this time, as shown in FIG. 8A, the center portions of the left and right side walls 122 to 124 are sandwiched between two fingers so that the circuit board 101 is parallel to the base portion 121. And the packaging material 120 holding the circuit board 101 is accommodated in the exterior box 100 in that state.

Japanese Patent Application Laid-Open No. 08-198378

  In the packing material 120, the base portion 121 is provided not near the bottom portion but near the center in the height direction. For example, when the vicinity of the upper end portions of the left and right side walls 122 to 124 is sandwiched between two fingers, the side wall 122 is provided. ~ 124 falls inward. Therefore, as shown to Fig.8 (a), you have to pinch | interpose the center part of the side walls 122-124 of right and left both sides with two fingers. Then, as shown in FIG. 8B, since the finger interferes with the lid and the side wall of the outer box 100, the finger must be shifted little by little, and workability is not so good. This is not solved even when working continuously using a dedicated packing machine instead of fingers. Further, an instruction manual or other accessories must be placed on the bottom surface of the outer box in advance, and if the position of the instruction manual is shifted, the lower ends of the side walls 122 to 124 of the packing material 120 are shifted. There is a risk of interfering with the parts, and in that case, the packing operation must be performed again.

  The present invention has been made in order to solve the above-described problems of the conventional example. In a packaging material formed by punching a cardboard into a predetermined shape and bending the cardboard into a predetermined shape, the width easily corresponds to the thickness of the plate material. To provide a packing material that can form a narrow slit-shaped holding portion, can hold an object to be packed such as a circuit board in a stable state, and can be easily stored in an outer box. With the goal.

In order to achieve the above object, a packaging material according to the invention is a packaging material formed by punching cardboard into a predetermined shape and further bending it into a predetermined shape,
At least one side of the plate-shaped package is engaged with each of the folded portions of the side wall portion so that the side wall portion formed by folding the corrugated cardboard at least once is folded. A substantially rectangular slit is formed at a different position in the thickness direction, the dimension in the short direction of each of the slits is larger than the thickness of the article to be packed, and each of the slits when the cardboard is folded , It is characterized in that it is partially overlapped in the short direction, and the dimension of the overlapped part is substantially equal to the thickness of the packaged item.

Further, the packaging material according to the invention is a packaging material formed by punching one cardboard into a predetermined shape and further bending it into a predetermined shape,
In a state where the plate-shaped packaged object is held, a base part that is substantially parallel to the packaged object, and a substantially perpendicular to the base part that engages and holds the packaged object, which are opposed to each other. A set of side walls,
Each of the pair of side wall portions is formed by folding the corrugated cardboard at least once, and substantially rectangular slits are formed in the folded portions at different positions in a direction substantially perpendicular to the base portion. The dimension of the overlapping portion of the slit in a direction substantially perpendicular to the base portion is configured to be substantially equal to the thickness of the packaged object.

  The base portion has a width substantially equal to the packaged object in the first direction, and the length of the slit in the second direction orthogonal to the first direction is the length of the packaged object in the same direction. Is preferably approximately equal to

The pair of side wall portions are respectively located at both ends of the base portion in the first direction, and with respect to the base portion along a first fold line parallel to a second direction orthogonal to the first direction. A first side wall bent substantially vertically and having a first predetermined dimension in the first direction;
The first side wall in the first direction is located at the end of the first side wall opposite to the base portion, and is bent substantially perpendicularly to the first side wall along a second fold line parallel to the second direction. A spacer portion having a second predetermined dimension substantially equal to the thickness of the cardboard in the first direction;
The spacer portion in the first direction is located at the end opposite to the first side wall and is bent substantially parallel to the first side wall along a third fold line parallel to the second direction. A second side wall having a dimension substantially equal to the first predetermined dimension in the first direction;
The second side wall in the first direction is located at the end of the second side opposite to the spacer portion, and is bent substantially parallel to the first side wall along a fourth fold line parallel to the second direction. A third side wall sandwiched between the first side wall and the second side wall and having a dimension substantially equal to the first predetermined dimension in the first direction,
The slits are preferably provided in the second side wall and the third side wall, respectively.

In the first direction, the second side wall has a first predetermined direction away from the fourth fold line on a side opposite to the third side wall with respect to the fourth fold line. A substantially rectangular first slit having a sixth predetermined dimension and a sixth predetermined dimension substantially the same as the length of the packaged object in the second direction is formed,
In the first direction, the first slit is formed on the third side wall at a position away from the fourth bend line by a fourth predetermined dimension on the side opposite to the second side wall with respect to the fourth bend line. A substantially rectangular second slit having substantially the same dimensions as
In a state where the second side wall and the third side wall are folded, it is preferable that the dimension of the overlapping portion of the first slit and the second slit in the first direction is substantially equal to the thickness of the packaged object.

  According to the above configuration, when the packaging material is stored in the outer box, the base portion is positioned on the bottom surface side of the outer box, and the package object, the base portion, and the pair of side walls constitute a substantially rectangular cross section. Even if the upper ends of the pair of side wall portions are sandwiched between two fingers, the one set of side wall portions does not fall inward. Therefore, it is possible to store the packaged item in the exterior box while being held in a stable state by the packing material. Furthermore, when the packing material is stored inside the outer box while holding the packaged item, it is not necessary to move the finger little by little, and workability is improved. Furthermore, by shifting the position of the slit formed in the side wall portion in a direction perpendicular to the base portion, for example, a slit having a desired width narrower than the thickness of the cardboard can be easily formed, so various thicknesses can be formed. A plate-shaped article can be packed.

The perspective view which shows the structure of the packaging material which concerns on one Embodiment of this invention. The expanded view of the packing material which concerns on the said embodiment. The figure which shows the procedure which accommodates the packing material which concerns on the said embodiment in an exterior box. The figure which shows the continuation of the procedure which accommodates the packing material which concerns on the said embodiment in an exterior box. Front sectional drawing which shows the structure of the most basic conventional packing material. The perspective view which shows the structure of the conventional packaging material improved. The developed view of the improved conventional packaging material. The figure which shows the procedure which accommodates the improved conventional packing material in an exterior box. The figure which shows the continuation of the procedure which accommodates the improved conventional packing material in an exterior box.

  A packaging material according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view showing a configuration of a packaging material 1 according to the present embodiment, FIG. 2 is a development view of the packaging material 1, and FIGS. 3 and 4 are packaging materials 1 in a state where an object to be packed (circuit board 101) is held. It is a figure which shows the procedure which accommodates in the exterior box.

  The packaging material 1 according to the present embodiment is a packaging material formed by punching a single cardboard into a predetermined shape, and further bending the cardboard into a predetermined shape. And a pair of side wall portions 12 that are substantially perpendicular to each other. In this embodiment, the side wall portion 12 has a three-layer structure formed by corrugating cardboards twice. As shown in FIG. 2, the base portion 11 is substantially parallel to the circuit board 101 in a state where the circuit board 101, which is a plate-shaped packaged object, is held. The pair of side wall portions 12 engages with both end portions of the circuit board 101 in a state substantially perpendicular to the base portion 11, and holds the circuit board 101 substantially horizontally.

  The development of FIG. 2 shows the state seen from the arrow B direction (back side) in FIG. 1, and a solid line shows a complete cut line and a broken line shows a half cut line (valley line) from the back side. The base portion 11 is located at the center of the corrugated cardboard piece to be cut, and the dimension W in the first direction (lateral direction in the figure) is substantially the same as the width of the circuit board 101 in the same direction. The pair of side wall portions 12 are respectively disposed on both sides of the base portion 11 in the first direction, and are each a first side wall 13, a spacer portion 14, a second side wall 15, and a third side wall that are bent in the same direction (inner side). 16 is provided.

  The first side wall 13 is located at both ends of the base portion 11 in the first direction, and extends along the first fold line 21 parallel to the second direction (vertical direction in the drawing) perpendicular to the first direction. On the other hand, it is bent substantially perpendicularly. The dimension H of the first side wall 13 in the first direction has a first predetermined dimension that is substantially equal to the height of the storage space inside the exterior box 100. The first predetermined dimension is set to be slightly smaller than the height of the storage space inside the outer box 100 in consideration of the thickness of the cardboard when the inner side in the cardboard folding direction is used as a reference. The spacer portion 14 takes into consideration the thickness of the cardboard, and has a second predetermined dimension T substantially equal to the thickness of the cardboard in the first direction. What is the base portion 11 of the first side wall 13 in the first direction? Arranged at the opposite end. The spacer portion 14 is bent substantially perpendicular to the first side wall 13 along a second fold line 22 parallel to the second direction, and becomes substantially parallel to the base portion 11. The second side wall 15 is located at the end of the spacer portion 14 on the opposite side of the first side wall 13 in the first direction, and is along the third fold line 23 parallel to the second direction with respect to the first side wall 13. It is bent almost in parallel. The second side wall 15 has a dimension H ′ substantially equal to the first predetermined dimension H in the first direction. The third side wall 16 is located at the end of the second side wall 15 opposite to the spacer part 14 in the first direction, and is along the fourth fold line 24 parallel to the second direction with respect to the first side wall 13. It is bent substantially in parallel and is sandwiched between the first side wall 13 and the second side wall 15. The third side wall 16 has a dimension H ″ substantially equal to the first predetermined dimension H in the first direction.

  As shown in FIG. 2, the packaging material 1 is assembled by folding the third side walls 16 at both ends along the fourth fold line 24 and folding the third side walls 16 on the second side wall 15. Next, the folded second side wall 15 and third side wall 16 are valley-folded along the third fold line 23. Then, the third side wall 16 is positioned on the spacer portion 14 in a substantially vertical state. In this state, the folded second side wall 15 and third side wall 16 are valley-folded along the second fold line 22. Then, the second side wall 15 and the third side wall 16 are folded on the first side wall 13. Finally, the first side wall 13, the second side wall 15, and the third side wall 16 that are folded in three layers are valley-folded along the first fold line 21. The pair of side wall portions 12 formed by folding cardboard in this way has a thickness equivalent to three cardboards, so that it does not fall further inward from the folded state as shown in FIG. The pair of side wall portions 12 is substantially perpendicular to the base portion 11.

  The two second side walls 15 respectively arranged in the left-right direction in the drawing with respect to the base portion 11 are formed with substantially rectangular first slits 17 elongated in the second direction, and similarly in the two third side walls 16. Is formed with a substantially rectangular second slit 18 elongated in the second direction. In this embodiment, the two first slits 17 and the two second slits 18 have the same dimensions, and the first slit 17 and the second slit 18 also have the same dimensions. The width Sw (fifth predetermined dimension) of the first slit 17 and the second slit 18 in the first direction is, for example, the minimum dimension that can be opened according to the thickness of the cardboard, or a dimension that has some allowance for the minimum dimension. It is. On the other hand, the length L (sixth predetermined dimension) of the first slit 17 and the second slit 18 in the second direction is substantially the same as the length of the circuit board 101 that is an object to be packed in the same direction. However, when the circuit board 101 which is an object to be packaged is not a quadrangle in a plan view and a notch or the like is formed and the lengths of the left and right sides are different, the left and right second sides in the second direction are matched to the shape of the circuit board 101. Needless to say, the dimensions of the first slit 17 and the second slit 18 are changed.

  Further, in the first direction, the first slit 17 of the second side wall 15 is a position away from the fourth fold line 24 by the third predetermined dimension T1 on the side opposite to the third side wall 16 with respect to the fourth fold line 24. Is formed. Similarly, the second slit 18 of the third side wall 16 is formed at a position away from the fourth fold line 24 by a fourth predetermined dimension T2 on the side opposite to the second side wall 15 with respect to the fourth fold line 24. Yes. Here, the third predetermined dimension T1 and the fourth predetermined dimension T2 are different values, and the first slit 17 and the second slit 18 in the first direction are folded in a state where the second side wall 15 and the third side wall 16 are folded. The dimension of the overlapping portion is set so as to be approximately equal to the thickness of the circuit board 101 which is a packaged object. When the thickness of the circuit board 101 is t, t≈Sw− | (T1−T2) |.

  Next, a procedure for packing the circuit board 101 into the outer box 100 using the packing material 1 will be described. As shown in FIG. 1, the first side wall 13, the second side wall 15, and the third side wall 16 on both the left and right sides are folded so that the side wall portion 12 is substantially perpendicular to the base portion 11. Next, as shown in FIG. 3A, one or both of the left and right side wall portions 12 are expanded outward, and the side portion 101a of the circuit board 101 is moved to the first slit 17 and the second side wall portion 12 of the one side wall portion 12. Insert into slit 18. Since the positions of the first slit 17 and the second slit 18 are shifted in a direction substantially perpendicular to the base portion 11, the width of the overlapping portion of the first slit 17 and the second slit 18 is the circuit as described above. It becomes substantially equal to the thickness of the substrate 101, and the side portion of the circuit substrate 101 can be engaged and held. At this time, the first side wall 13 in which no slit is formed functions as a stopper for the side portion 101 a of the circuit board 101. By inserting the opposite side portion 101b of the circuit board 101 into the first slit 17 and the second slit 18 of the other side wall portion 12, as shown in FIG. The circuit board 101 can be engaged and held. Further, in a state where the circuit board 101 is engaged and held by the packing material 1, the circuit board 101, the base portion 11, and the pair of side wall portions 12 constitute a substantially square cross section, and further, the one set of side wall portions 12 constitutes each other. The left and right second side walls 15 and the third side wall 16 are in contact with the upper surface of the base portion 11. Therefore, even if the upper end portion of the pair of side wall portions 12 is sandwiched between two fingers, the side wall portion 12 does not fall inward.

  As shown in FIG. 4A, the packaging material 1 holding the circuit board 101 inside the exterior box 100 is held in a state where the upper ends of the pair of side wall portions 12 are sandwiched between two fingers in this way. Can be inserted. At that time, since the lid of the outer packaging box 100 and the finger do not interfere with each other, it is not necessary to shift the finger little by little, and the packing operation can be performed smoothly. Furthermore, since the base portion 11 faces the bottom surface of the exterior box 100 and is in contact with almost the entire surface in a state where the packaging material 1 is housed in the exterior box 100, the effect of reinforcing the bottom surface of the exterior box 100 is obtained. It is done. Furthermore, the instruction manual 102 and other accessories can be placed on the base portion 11 in advance, and the packing operation can be performed smoothly.

  In addition, this invention is not limited to the structure of the said embodiment, A various deformation | transformation is possible. In the above embodiment, the third side wall 16 supports the lower surface of the circuit board 101 and the second side wall 15 supports the upper surface of the circuit board 101. However, the second side wall 15 supports the lower surface of the circuit board 101. The upper surface of the circuit board 101 may be supported by the third side wall 16. In the latter case, a conductor pattern or the like can be disposed in the vicinity of the side end portion of the upper surface of the circuit board 101 even in a range overlapping with the second side wall 15 in plan view, and the dead space of the circuit board 101 can be reduced. it can. Further, according to the structure of the circuit board 101, the conductor pattern, and the like, on one side 101a, the third side wall 16 supports the lower surface of the circuit board 101, and the second side wall 15 supports the upper surface of the circuit board 101. The other side portion 101 b may be configured such that the lower surface of the circuit board 101 is supported by the second side wall 15 and the upper surface of the circuit board 101 is supported by the third side wall 16. Furthermore, in the said embodiment, although the example which integrated the base part 11 and 1 set of side wall parts 12 was shown, the said base part 11 is not necessarily required, but the packing material 1 is isolate | separated into two or more pieces. May be. For example, each side of a plate-shaped packaged object is folded and folded so that a pair of side walls formed by corrugated cardboard is folded at least once. A substantially rectangular slit is formed at a different position in a direction substantially perpendicular to the shape part, and the dimension of the overlapping portion of the slit in the same direction is substantially equal to the thickness of the packaged object. The number of times of folding is not particularly limited. Thereby, a packaging material similar to the conventional packaging material 110 shown in FIG. 5 can be realized without bonding the cardboard pieces using an adhesive. Further, the first side wall 13 in which no slit is formed is not necessarily required.

DESCRIPTION OF SYMBOLS 1 Packing material 11 Base part 12 Side wall part 13 1st side wall 14 Spacer part 15 2nd side wall 16 3rd side wall 17 1st slit 18 2nd slit 21 1st fold line 22 2nd fold line 23 3rd fold line 24 4th Folding line 100 Outer box 101 Circuit board (plate-like packaged item)
102 Instruction Manual W Width of the base part in the first direction (width of the item to be packed)
H Dimension of first side wall (first predetermined dimension, dimension substantially equal to height of outer box storage space)
T dimension of the spacer portion in the first direction (second predetermined dimension, dimension substantially equal to the thickness of the cardboard)
H 'Dimensions of the second side wall in the first direction (dimensions substantially equal to the first predetermined dimension)
H "Dimension of third side wall in first direction (dimension substantially equal to first predetermined dimension)
T1 Distance from the fourth fold line to the first slit (third predetermined dimension)
T2 Distance from the fourth fold line to the second slit (fourth predetermined dimension)
Sw Width of first and second slits in first direction (fifth predetermined dimension)
L Length of the first and second slits in the second direction (sixth predetermined dimension: length of the packaged item)
t Circuit board (packaged) thickness

Claims (5)

A packaging material formed by punching corrugated cardboard into a predetermined shape and bending it into a predetermined shape,
At least one side of the plate-shaped package is engaged with each of the folded portions of the side wall portion so that the side wall portion formed by folding the corrugated cardboard at least once is folded. A substantially rectangular slit is formed at a different position in the thickness direction, the dimension in the short direction of each of the slits is larger than the thickness of the article to be packed, and each of the slits when the cardboard is folded , A packaging material, wherein the packaging material is configured to partially overlap in a short length direction, and a dimension of the overlapping portion is substantially equal to a thickness of the packaged object. A packaging material formed by punching one cardboard into a predetermined shape and bending it into a predetermined shape,
In a state where the plate-shaped packaged object is held, a base part that is substantially parallel to the packaged object, and a substantially perpendicular to the base part that engages and holds the packaged object, which are opposed to each other. A set of side walls,
Each of the pair of side wall portions is formed by folding the corrugated cardboard at least once, and substantially rectangular slits are formed in the folded portions at different positions in a direction substantially perpendicular to the base portion. The packaging material is characterized in that the dimension of the overlapping portion of the slit in a direction substantially perpendicular to the base portion is substantially equal to the thickness of the article to be packed.   The base portion has a width substantially equal to the packaged object in the first direction, and the length of the slit in the second direction orthogonal to the first direction is the length of the packaged object in the same direction. The packaging material according to claim 2, which is substantially equal to The pair of side wall portions are respectively located at both ends of the base portion in the first direction, and with respect to the base portion along a first fold line parallel to a second direction orthogonal to the first direction. A first side wall bent substantially vertically and having a first predetermined dimension in the first direction;
The first side wall in the first direction is located at the end of the first side wall opposite to the base portion, and is bent substantially perpendicularly to the first side wall along a second fold line parallel to the second direction. A spacer portion having a second predetermined dimension substantially equal to the thickness of the cardboard in the first direction;
The spacer portion in the first direction is located at the end opposite to the first side wall and is bent substantially parallel to the first side wall along a third fold line parallel to the second direction. A second side wall having a dimension substantially equal to the first predetermined dimension in the first direction;
The second side wall in the first direction is located at the end of the second side opposite to the spacer portion, and is bent substantially parallel to the first side wall along a fourth fold line parallel to the second direction. A third side wall sandwiched between the first side wall and the second side wall and having a dimension substantially equal to the first predetermined dimension in the first direction,
The packing material according to claim 2 or 3, wherein the slits are respectively provided in the second side wall and the third side wall. In the first direction, the second side wall has a first predetermined direction away from the fourth fold line on a side opposite to the third side wall with respect to the fourth fold line. A substantially rectangular first slit having a sixth predetermined dimension and a sixth predetermined dimension substantially the same as the length of the packaged object in the second direction is formed,
In the first direction, the first slit is formed on the third side wall at a position away from the fourth bend line by a fourth predetermined dimension on the side opposite to the second side wall with respect to the fourth bend line. A substantially rectangular second slit having substantially the same dimensions as
In the state where the second side wall and the third side wall are folded, the dimension of the overlapping portion of the first slit and the second slit in the first direction is substantially equal to the thickness of the packaged item. The packaging material according to claim 4.

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