JP2007320654A - Corner cushioning material and packing equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To pack a plurality of plate-shaped objects to be packed and economically and efficiently protect corners of the objects to be packed, and to show resistance to vertical external force, and to load during stacking Prevent collapse.
A corner cushioning material is formed by projecting an insole from an outer frame having first and second outer frame portions. The first and second outer frame portions 25 and 26 are formed in a cylindrical shape having a rectangular cross section. The corner cushioning material 10 includes an insole 15 inserted between stacked objects to be packed, and two side surfaces at the corners of the objects to be packed by the side walls 101 of the first and second outer frame parts 25 and 26. The article to be packed is covered so as to cross the ridge line portion formed by.
[Selection] Figure 1

Description

  The present invention relates to a corner cushioning material and a packing device that are used to stack a plurality of plate-shaped objects to be packed.

  In general, a plate-shaped article such as a solar battery panel is packed and transported by a cardboard packing device after manufacturing. For example, Patent Document 1 discloses a packing device 1 that stacks and stacks two solar battery panels (see FIG. 17 attached to the present specification). The solar cell panel is a plate-like body having a pair of rectangular planes having a relatively large area and surrounding side surfaces. This solar cell panel has a corner formed by one plane and two side surfaces. One corner includes a ridge line portion in the thickness direction formed by two side surfaces, a ridge line portion formed by one plane and one of the two side surfaces, and one plane and two side surfaces. And three ridge lines with the ridge formed by the other. According to the disclosure of Patent Document 1, the packaging device 1 is formed by bending a corrugated sheet material so that the cross-sectional shape is substantially E-shaped. It is used by inserting the insole 3 between the solar cell panels by fitting side surfaces along the direction.

  However, the packaging device 1 of Patent Document 1 is a simple packaging called “bare packaging” and is formed of a single wall structure, and thus has low strength. For this reason, when several sets of two sheets of packed solar cell panels are stacked, the packaging device 1 is deformed by an external force due to the vertical solar cell panel load, and as a result, load collapse occurs. is there. Further, during transportation of the packed solar cell panel, there was a problem of damage to the solar cell panel due to dropping of the packed solar cell panel, particularly damage to the corners of the solar cell panel.

  On the other hand, as a cushioning material with improved strength, a corner cushioning material for packaging rectangular parallelepiped electrical appliances such as a microwave oven is known (see Patent Document 2). As shown in FIG. 18 attached to the present specification, this corner cushioning material 5 is formed in a step shape by a cylindrical upper step piece 6 and a lower step piece 7, and a recess formed by the upper step piece 6 and the lower step piece 7. In addition, it is used so that the corners of the electrical appliances to be packed are fitted.

  However, when such a stepped corner cushioning material 5 protects a corner portion of a solar cell panel which is a plate-shaped packaged object, not only a ridge line portion formed by two side surfaces in the corner portion but also a corner portion. Since the solar cell panel is covered so as to cross all three ridges in the unit, only one corner of the solar cell panel can be protected, and to protect the eight corners of one solar cell panel There is a problem that 8 corner cushioning materials are required and the structure is uneconomical and inefficient. Further, the structure of the stepped corner cushioning material 5 is not suitable for protecting a plurality of plate-shaped objects to be packed.

JP 2001-348056 A JP 7-149372 A

  It is an object of the present invention to stack a plurality of plate-shaped objects to be packed and economically and efficiently protect corners of the objects to be packed, and to show resistance to vertical external force. An object of the present invention is to provide a corner cushioning material that can prevent the collapse of the load.

The present invention is used to stack and pack a plurality of plate-shaped objects having a pair of planes and surrounding side surfaces, and is formed by one plane and two side surfaces of each of the objects to be packed. A corner cushioning material that protects corners,
A first outer frame portion and a second outer frame portion bent and connected to the first outer frame portion, wherein the first and second outer frame portions have a cross-sectional shape perpendicular to the longitudinal axis. An outer frame formed in a rectangular cylinder,
Projecting perpendicularly from one side wall portion of the first and second outer frame portions to the one side wall portion, being in a plate shape parallel to the axis of the first and second outer frame portions, and inserted between the packed items With an insole,
The outer frame covers the object to be packaged such that one side wall of the first and second outer frame parts crosses a ridge line formed by two side surfaces of the corner of each object to be packed. It is a featured corner cushioning material.

Preferably, the article to be packed is a plate-like body having a pair of rectangular planes and four surrounding side surfaces,
The first outer frame portion has a longitudinal axis parallel to a first direction perpendicular to the thickness direction of the insole, and the second outer frame portion is bent vertically to the first outer frame portion. ,
The first and second outer frame portions each have two side wall portions parallel to the thickness direction of the insole and two plate portions perpendicular to the thickness direction of the insole, and each side wall portion is a plate portion. Are connected to each other and formed into a cylindrical shape having a rectangular cross section perpendicular to the axis,
The one side wall portion is one of the two side wall portions of the first and second outer frame portions.

Further preferably, the insole has a first insole portion continuous with the first outer frame portion and a second insole portion continuous with the second outer frame portion,
The first and second insole portions have engaging portions that are engaged with each other.

  Preferably, the apparatus further comprises a reinforcing body attached to the outer frame for improving strength against external force.

Preferably, the reinforcing body has a corner reinforcing body provided at a bent portion where the first and second outer frame portions are continuous.
The corner reinforcing body includes a first corner reinforcing body portion that is inserted into the first outer frame portion, and a second corner portion reinforcement that is connected to the first corner portion reinforcing body portion and is inserted into the second outer frame portion. Having a body part,
The first corner portion reinforcing body portion includes a plurality of first corner portion reinforcing walls parallel to the axis of the first outer frame portion and the thickness direction of the insole, and the first corner portion reinforcing wall. A plurality of first reinforcing plates perpendicular to the thickness direction;
The second corner portion reinforcing body portion includes a plurality of second corner portion reinforcing walls parallel to the axis of the second outer frame portion and the thickness direction of the insole, and the second corner portion reinforcing wall. And a plurality of second reinforcing plates perpendicular to the thickness direction.

Preferably, the reinforcing body includes a first outer frame reinforcing body attached to the first outer frame portion, avoiding a bent portion where the first and second outer frame portions are continuous, and the first and second outer bodies. A second outer frame reinforcing body attached to the second outer frame part, avoiding the bent part where the outer frame part continues,
The first outer frame reinforcement is connected to the first base wall parallel to the axis of the first outer frame and the thickness direction of the insole, and is connected to the first base wall, and is perpendicular to the axis of the first outer frame. A plurality of first outer frame reinforcing walls,
The second outer frame reinforcement body is connected to the second base wall parallel to the axis of the second outer frame and the thickness direction of the insole, and is connected to the second base wall, and is perpendicular to the axis of the second outer frame. And a plurality of second outer frame reinforcing walls.

Also preferably, a packing device for packing a plurality of plate-shaped objects to be packed,
The aforementioned corner cushioning material that protects the corners of each packaged item,
Two cover materials for covering each object to be packed whose corners are protected by a corner cushioning material from both sides in the thickness direction of the object to be packed;
A packing device including a binding material for binding the two cover materials.

  According to the present invention, a plurality of plate-shaped objects to be packed are stacked, an insole is inserted between the objects to be packed, and one side wall portion of the first and second outer frame parts of the outer frame is attached to each of the objects to be packed. The object to be packed can be protected by covering the object to be packed with an outer frame so as to cross the ridge line part formed by the two side surfaces in the corner part. A ridge line portion formed by two side surfaces in one corner portion of the packaged object is connected to a ridge line portion formed by two side surfaces in another corner portion different from the one corner portion. Further, the outer frame is such that one side surface portion of the first and second outer frame portions does not cross all three ridge line portions in the corner portion but crosses the ridge line portion formed by the two side surfaces in the corner portion. Furthermore, since the portion to be packed is covered, the two corners of the packed object can be protected by one corner cushioning material. In this way, a plurality of plate-shaped objects to be packed can be stacked and packed, and the corners of the objects to be packed can be protected economically and efficiently. Furthermore, since the outer frame is formed in a cylindrical shape having a rectangular cross-sectional shape, the corner cushioning material has a greater strength than a single wall structure. Therefore, even if several sets of packed items to be packed are stacked, the corner cushioning material is resistant to external force due to the load of the packed item in the vertical direction, preventing deformation and preventing collapse. can do.

[First Embodiment]
[Overall configuration]
FIG. 1 is a perspective view of a corner cushioning material 10 according to a first embodiment of the present invention as viewed from the inner side. The direction from the corner cushioning material 10 toward the object to be packed is inward, and the direction from the corner cushioning material 10 to the side opposite to the object to be packed is outward. One direction perpendicular to the thickness direction z of the insole 15 is the first direction x, and the direction perpendicular to the thickness direction z of the insole 15 and perpendicular to the first direction x is the second direction y. Hereinafter, “the thickness direction of the insole 15” is referred to as “the insole thickness direction”. The packed object will be described later.

  The corner cushioning material 10 is a cushioning material that is used for stacking and stacking a plurality of plate-shaped objects to be packed, and that protects corners of the objects to be packed. In the first embodiment, the corner cushioning material 10 is used for stacking two packages to be packed. The corner cushioning material 10 includes an outer frame 14 and an insole 15.

  The outer frame 14 includes a first outer frame portion 25 and a second outer frame portion 26 that is bent and connected to the first outer frame portion 25. In the first embodiment, the second outer frame portion 26 is bent perpendicularly to the first outer frame portion 25, and the outer frame 14 is concave on the inner side and convex on the outer side.

  The first outer frame portion 25 is formed in a cylindrical shape whose cross section perpendicular to the longitudinal axis L1 of the first outer frame portion 25 is rectangular. The second outer frame portion 26 is formed in a cylindrical shape whose cross section perpendicular to the longitudinal axis L2 of the second outer frame portion 26 is rectangular. The axis L1 of the first outer frame portion 25 is parallel to the first direction x, the axis L2 of the second outer frame portion 26 is parallel to the second direction y, and the first and second outer frame portions 25, As for 26, the axial direction one end parts are mutually connected.

  In the outer frame 14 having the first and second outer frame portions 25 and 26, one side wall portion 101 of the first and second outer frame portions 25 and 26 is formed by two side surfaces at the corners of each packaged item. It is the structure which covers a to-be-packaged object so that the ridgeline part which crosses may be crossed. Each one side wall portion 101 is an inner side wall portion of the first and second outer frame portions 25 and 26.

  The insole 15 projects vertically from the one side wall portion 101 of the first and second outer frame portions 25 and 26 to the one side wall portion 101 and is parallel to the axes L1 and L2 of the first and second outer frame portions 25 and 26. Is. The insole 15 protrudes inward from the outer frame 14 and is inserted between the packed objects when the outer frame 14 covers a plurality of stacked packed objects. In the first embodiment, the insole 15 is one and protrudes from the center position in the insole thickness direction z of the one side wall portion 101 of the first and second outer frame portions 25 and 26.

[Outer frame]
FIG. 2 is a cross-sectional view taken along section line S2-S2 in FIG. The first and second outer frame portions 25 and 26 basically have the same configuration, and the first outer frame portion 25 will be described in detail as a representative, and the first outer frame portion 26 in the second outer frame portion 26 will be described in detail. The same components as those of the frame portion 25 are denoted by the same reference numerals, detailed description of the second outer frame portion 26 is omitted, and only the configuration different from that of the first outer frame portion 26 will be described.

[First outer frame]
FIG. 2 shows a cross section perpendicular to the axis L <b> 1 of the first outer frame portion 25. In FIG. 2, the left side is the inner side of the corner cushioning material 10, and the right side is the outer side of the corner cushioning material 10. As shown in FIG. 2, the first outer frame portion 25 includes two side wall portions 101 and 55 that are parallel to the insole thickness direction z, and two plate portions 56 and 59 that are perpendicular to the insole thickness direction z. The side wall portions 101 are connected by the plate portions 56 and 59, and are formed in a cylindrical shape having a rectangular cross section perpendicular to the axis L1 of the first outer frame portion 25. The side wall portions 101 and 55 and the plate portions 56 and 59 are parallel to the axis L1 of the first outer frame portion 25 and extend long in the first direction x parallel to the axis L1 of the first outer frame portion 25. .

  The side wall portions 101 and 55 are provided in parallel with each other in the second direction y, and one side wall portion 101 which is one of the side wall portions 101 and 55 is provided on the inward side and the other side. The other side wall portion 55 is provided on the outer side. The one side wall portion 101 includes two side wall portions 57 and 60, and the side wall portions 57 and 60 are provided side by side in the insole thickness direction z so as to be flush with each other. The plate portions 56 and 59 are provided parallel to each other with an interval between the insole thickness direction z.

  One end portion (the upper end portion in FIG. 2) of two end portions parallel to the first direction x in the other side wall portion 55 is connected to the outer end portion of the one plate portion 56. Yes. One plate portion 56 is bent inward in a direction perpendicular to the other side wall portion 55. Further, the other end portion (the lower end portion in FIG. 2) of the two end portions parallel to the first direction x in the other side wall portion 55 is connected to the outer end portion of the other plate portion 59. ing. The other plate portion 59 is bent inwardly perpendicular to the other side wall portion 55.

  One side wall portion 57 of the one side wall portion 101 has one end portion (the upper end portion in FIG. 2) of the two end portions parallel to the first direction x inward in the one plate portion 56. It is connected to the end of the side. One side wall portion 57 is bent perpendicularly to the one plate portion 56 toward the other plate portion 59. The other side wall portion 60 of the one side wall portion 101 has one end portion (the end portion on the lower side in FIG. 2) of the two end portions parallel to the first direction x being inward of the other plate portion 59. It is connected to the end of the side. The other side wall portion 60 is bent to the other plate portion 59 side perpendicularly to the other plate portion 59. In this way, the side wall portions 101 and 55 and the plate portions 56 and 59 are bent and connected to each other, and the cylindrical first outer frame portion 25 having a rectangular cross section is formed.

  The first outer frame portion 25 has two backing pieces 58 and 61. Each of the backing pieces 58 and 61 is a component for sandwiching and supporting the insole 15. The backing pieces 58 and 61 are provided between the plate portions 56 and 59 in parallel with the plate portions 56 and 59.

  One backing piece 58 has an end portion on the outer side continuous to an end portion (one end portion on the lower side in FIG. 2) opposite to the end portion connected to one plate portion 56 in one side wall portion 57. Yes. One backing piece 58 bends outward in a direction perpendicular to one side wall portion 57, and an end portion opposite to the end portion connected to the one side wall portion 57 is in contact with the other side wall portion 55. Yes. The other backing piece 61 has an end on the outer side connected to an end opposite to the end connected to the other plate 59 in the other side wall portion 60 (upper end in FIG. 2). Yes. The other backing piece 61 bends outward in a direction perpendicular to the other side wall portion 60, and the end opposite to the end connected to the other side wall portion 60 is in contact with the other side wall portion 55. Yes.

  Further, the first outer frame portion 25 has an end wall portion 63 and an insertion bent piece 32 at the other end portion in the axial direction. In FIG. 2, in order to help understanding of the end wall part 63, it has shown in the state which removed the bending pieces 64 and 65 shown in below-mentioned FIG. The end wall portion 63 is provided perpendicular to the axis L1 of the first outer frame portion 25, and closes the other end portion in the axial direction of the first outer frame portion 25 (the end portion on the depth side with respect to the paper surface of FIG. 2). The end wall 63 is connected to an end disposed on the other end in the axial direction of the first outer frame 25 in the other side wall 55, and the end wall 63 is connected to the other side wall. It bends inwardly perpendicular to 55. An end portion of the other end portion 55 that is continuous with the end wall portion 63 is an end portion that is parallel to the insole thickness direction z.

  The inserted bent piece 32 is inserted into a cylinder formed by the side wall portions 101 and 55 and the plate portions 56 and 59, is provided in parallel with the one side wall portion 101, and is in contact with the one side wall portion 101. . The insertion bent piece 32 has a base end portion that is continuous with an inner end portion of the end wall portion 63 and is bent perpendicularly to the end wall portion 63 toward one end portion in the axial direction of the first outer frame portion 25. is doing. By inserting the insertion bent piece 32 into the cylinder of the first outer frame portion 25, the first outer frame portion 25 can be held in a cylindrical shape.

[Second outer frame]
Although illustration of the cross section of the 2nd outer frame part 26 is abbreviate | omitted, the 2nd outer frame part 26 is each side wall part 101,55, each plate part 56,59 similarly to the 1st outer frame part 25 shown in FIG. Each of the backing pieces 58 and 61, the end wall portion 63, and the insertion bent piece 32 are provided. As a difference from the first outer frame portion 25, in the second outer frame portion 26, the side wall portions 101 and 55 and the plate portions 56 and 59 are parallel to the axis L <b> 2 of the second outer frame portion 26, and 2 It extends long in the second direction y parallel to the axis L2 of the outer frame portion 26. In the second outer frame portion 26, the end wall portion 63 is provided perpendicular to the axis L <b> 2 of the second outer frame portion 26 and closes the other axial end of the second outer frame portion 26.

[Connection structure of first and second outer frame portions]
FIG. 3 is a perspective view showing the corner cushioning material 10 in a state before the first and second outer frame portions 25 and 26 are bent. An end of the first outer frame 25 on the other side wall 55 arranged at one end in the axial direction of the first outer frame 25 and the second outer frame 26 on the other side wall 55 of the second outer frame 26. The end portions arranged at the one end portion in the axial direction are continuous with each other. The end portions of the other side wall portions 55 connected to each other are end portions parallel to the insole thickness direction z, and the first and second outer frame portions 25 and 26 are connecting portions 27 where the other side wall portions 55 are connected to each other. It is connected to each other. The first and second outer frame portions 25 and 26 are bent vertically along the connecting portion 27.

  In a state where the first and second outer frame portions 25 and 26 are bent, the respective side wall portions 101 are in contact with each other in a state of being arranged perpendicular to each other, and the respective one plate portions 56 are arranged flush with each other. Abutting, and the other plate portions 59 are disposed flush with each other. Thus, the outer frame 14 is formed in a cylindrical shape bent vertically.

[Insole]
As shown in FIGS. 1 and 3, the insole 15 includes a first insole portion 28 that is continuous with the first outer frame portion 25 and a second insole portion 29 that is continuous with the second outer frame portion 26. The first and second insole portions 28 and 29 basically have the same configuration, and the first insole portion 28 will be described in detail as a representative, and the first insole portion 28 in the second insole portion 29 and The same reference numerals are given to the same components, and the detailed description of the second insole portion 29 will be omitted, and only the configuration different from the first insole portion 28 will be described.

[First insole]
As shown in FIG. 2, the first insole portion 28 is sandwiched between the side wall portions 57 and 60 of the one side wall portion 101, and the outer end portion and the vicinity thereof are the side walls of the first outer frame portion 25. It is inserted into a cylinder formed by the portions 101 and 55 and the plate portions 56 and 59. The outer end portion of the first insole portion 28 is connected to one of the backing pieces 58 and 61, or the outer end portion of the other backing piece 61 in the first embodiment. The first insole portion 28 has an outer end portion inserted into the inside of the cylinder of the first outer frame portion 25 and its vicinity folded on the other backing piece 61 so that each backing piece 58, 61 has a It is bent and reversed with respect to the other backing piece 61 so as to be sandwiched, passes between the side wall portions 57 and 60, and protrudes from the one side wall portion 101. The first insole portion 28 is in contact with the backing pieces 58 and 61 from both sides of the insole thickness direction z at the outer side end portion and the vicinity thereof, and is sandwiched by the backing pieces 58 and 61. .

[Support structure for first insole]
Although FIG. 6 is a figure for demonstrating 2nd Embodiment mentioned later, since the outer frame 14 and the insole 15 are the same structures in 1st and 2nd embodiment, with reference to FIG. A support structure of the first insole portion 28 will be described. The first outer frame portion 25 is provided with a pair of inner folding pieces 67 and 68 in the shape of a double door that is connected to the other side wall portion 55 at a substantially central portion in the axial direction of the first outer frame portion 25. The other side wall portion 55 is formed with an opening 135 having a rectangular shape when viewed in the thickness direction of the other side wall portion 55, and two end portions parallel to the insole thickness direction z in the opening 135 of the other side wall portion 55 are respectively The outer ends of the inner folding pieces 67 and 68 are connected to each other. Each of the inner folding pieces 67 and 68 bends inwardly perpendicularly to the other side wall portion 55, and is provided perpendicular to the axis L <b> 1 of the first outer frame portion 25. The inner folding pieces 67 and 68 are in contact with the plate portions 56 and 59 at both ends of the insole thickness direction z.

  A notch groove 130 is formed at the inner end of each of the inner folding pieces 67 and 68. In each of the backing pieces 58 and 61 and the first insole portion 28, a notch groove 131 is formed at a position corresponding to each of the inner folding pieces 67 and 68. The backing pieces 58 and 61 and the first insole portion 28 are fitted into the notched grooves 13 of the inner folding pieces 67 and 68, and the notched grooves of the backing pieces 58 and 61 and the first insole portion 28. Each inner folding piece 67, 68 is fitted in 131. In this manner, the respective backing pieces 58 and 61 and the first insole portion 28 are supported by the inner folding pieces 67 and 68 from both sides of the insole thickness direction z.

[Second insole]
Although illustration of the cross section of the 2nd insole part 29 is abbreviate | omitted, the 2nd insole part 29 is either of each backing piece 58,61 of the 2nd outer frame part 26 similarly to the 1st insole part 28 shown in FIG. Alternatively, in the first embodiment, it is connected to the outer end of the other backing piece 61, and is sandwiched between the backing pieces 58 and 61 of the second outer frame portion 26, and is one of the second outer frame portions 26. It protrudes from the side wall 101. The second insole portion 29 is supported by each inner folded piece formed by the second outer frame portion 26 as with the first outer frame portion 25.

[Engagement structure of first and second insole parts]
Referring to FIG. 3, first and second insole portions 28, 29 have engaging portions 45, 46 engaged with each other. The engaging portions 45 and 46 are formed at the end portions of the first and second insole portions 28 and 29 on the side close to each other. One of the engaging portions 45 and 46 is formed in a convex shape, and the other is formed in a concave shape. In the first embodiment, the engaging portion 45 of the first insole 28 is formed in a convex shape, and the engaging portion 46 of the second insole 29 is formed in a concave shape.

  As shown in FIG. 3, the engaging portions 45 and 46 are not spaced apart from each other and engaged before the first and second outer frame portions 25 and 26 are bent. As shown, in a state where the first and second outer frame portions 25 and 26 are bent perpendicularly to each other, the convex engaging portion 45 is fitted into the concave engaging portion 46 and engaged with each other. The By engaging the engaging portions 45 and 46, the first and second outer frame portions 25 and 26 are held in a bent state.

[Twisting prevention structure]
As shown in FIG. 3, the corner cushioning material 10 includes a first component 43 configured by the first outer frame portion 25 and the first insole portion 28, and a second outer frame portion 26 and a second insole portion 29. The second component 44 is connected only by the connecting portion 27 where the other side wall portions 55 of the first and second outer frame portions 25 and 26 are connected to each other. In this way, the first and second insole portions 28 and 29 that are connected only by the connecting portion 27 are twisted so that the first and second insole portions 28 and 29 are displaced in the thickness direction. In order to prevent this, a pair of guide pieces 48 and 49 are provided on either one of the first and second components 43 and 44 with an interval in the insole thickness direction z, and the first and second components 43 and 44 On the other side, an insertion piece 47 to be inserted between the guide pieces 48 and 49 is provided.

  Each guide piece 48, 49 is provided, for example, at one axial end of the first outer frame portion 25. One side wall portion 57 and one backing piece 58 are provided with one guide piece 48 having an L-shaped cross section so as to protrude toward the second outer frame portion 25, and the other side wall portion 60 and the other backing piece. The other guide piece 49 having an L-shaped cross section is provided on the piece 61 so as to protrude toward the second outer frame portion 25 side. The insertion piece 47 is provided so as to protrude toward the first outer frame portion 25 at, for example, the outer end portion of the end portion of the second insole portion 29 adjacent to the first insole portion 28.

  As shown in FIG. 3, in the state before the first and second outer frame portions 25, 26 are bent, the insertion piece 47 has escaped from the gap between the guide pieces 48, 49. The insertion piece 47 is configured to be inserted between the guide pieces 48 and 49 in a state where the second outer frame portions 25 and 26 are bent perpendicularly to each other. By inserting the insertion piece 47 between the guide pieces 48 and 49, it is possible to prevent the aforementioned twist from occurring in the first and second component parts 43 and 44.

[Outer frame and insole sheet materials]
[Sheet material outline]
FIG. 4 is a developed view showing the corrugated sheet material 16 forming the outer frame 14 and the insole 15 in a developed state before assembly. FIG. 4 shows the sheet material 16 as viewed from the back surface side, and the back surface is a surface that becomes the inner surface of the cylinder of the first and second outer frame portions 25 and 26 in the assembled state. In FIG. 4, the broken line indicates the position where the valley is folded, and the alternate long and short dash line indicates the position where the mountain is folded. Further, in FIG. 4, the core extending direction TD and the flow direction MD are shown in a part of the region 50. The middle core extending direction TD is a direction in which the irregularities of the middle core extend, and the flow direction MD is a direction perpendicular to the middle core extending direction TD. In order to facilitate understanding, one of the core extending directions TD that are upper in FIG. 4 is referred to as “upper”, the other of the core extending directions TD that is lower in FIG. 4 is referred to as “lower”, and left in FIG. One flow direction MD is referred to as left, and the other flow direction MD in FIG. 4 is referred to as right.

  The left part is the first component 43 and the right part is the second component 44. The first and second components 43 and 44 are provided with other side wall portions 55 that extend in the flow direction MD, which is the left-right direction in FIG. The other side wall 55 of the second component 44 is provided on the right side of the other side wall 55 of the first component 43. The connecting portion 27 where the other side wall portions 55 are continuous is parallel to the center core extending direction TD.

[First component]
As shown in FIG. 4, in the first component portion 43, one plate portion 56 is provided continuously to the upper side of the other side wall portion 55, and one side wall portion 57 is continuous to the upper side of the one plate portion 56. One backing piece 58 is provided continuously to the upper side of the one side wall portion 57. The other plate portion 59 is provided continuously to the lower side of the other side wall portion 55, the other side wall portion 60 is provided to be connected to the lower side of the other plate portion 59, and the lower side of the other side wall portion 60 is provided. The other backing piece 61 is provided continuously, and the first insole portion 28 is provided continuously to the lower side of the other backing piece 61. One plate portion 56, one side wall portion 57, one backing piece 58, the other plate portion 59, the other side wall portion 60, the other backing piece 61 and the first insole portion 28 are connected to the other side wall portion 55. Similarly, it extends long in the flow direction MD.

  Further, an end wall portion 63 is provided continuously to the left side of the other side wall portion 55, and an insertion bent piece 32 is provided continuously to the left side of the end wall portion 63. Further, a bent piece 64 is provided continuously to the left side of one plate portion 56, and a bent piece 65 is provided to be connected to the left side of the other plate portion 59. Between each bent piece 64,65 and each plate part 56,59, the 1st outer frame part 25 respond | corresponds to the impact force of ay direction, and the 2nd outer frame part 26 does the impact of ax direction, etc. Through holes 140 and 141 are formed to provide a buffering effect against the external force. A convex engagement portion 45 is formed at the right end of the first insole portion 28. Further, one guide piece 48 is formed protruding from the one side wall portion 57 and the one backing piece 58 to the right side, and protruding from the other side wall portion 60 and the other backing piece 61 to the right side. Thus, the other guide piece 49 is formed.

  Further, a pair of inwardly folded pieces 67 and 68 are provided at the center of the other side wall portion 55 in the flow direction MD in a double door shape. The inner folding pieces 67 and 68 are provided side by side in the flow direction MD, and are connected to the other side wall portion 55 at the end portions on the side away from each other. In the first component portion 43, the first outer frame portion 25 is formed by a portion excluding the first insole portion 28.

[Second component]
As shown in FIG. 4, the 2nd structure part 44 has the structure which becomes substantially symmetrical with respect to the 1st structure part 43 and the symmetrical line which passes along the connection part 27 parallel to the core extension direction TD. Only the asymmetric configuration will be described. In the second component 44, a second insole 29 is provided instead of the first insole 28. In the second insole portion 29, a concave engaging portion 46 is formed instead of the convex engaging portion 45. The second insole portion 29 is formed with an insertion piece 47 at the left end. Further, the guide pieces 48 and 49 are not formed in the second component 44, but instead, a bent piece 75 protruding leftward is formed on one side wall portion 57, and the other side wall is formed. A bent piece 76 protruding leftward is formed in the portion 60. In the second configuration portion 44, the second outer frame portion 26 is configured by a portion excluding the first insole portion 28.

  The end faces 75a and 76a of the bent pieces 75 and 76 and the end faces 48a and 49a of the guide pieces 48 and 49 are bent in the first and second outer frame portions 25 and 26 at right angles. The second outer frame portion 26 is in contact with and supported by the other side wall portion 55, and the compressive strength in the thickness direction of the second outer frame portion 26, that is, the x direction is improved.

[Assembly of corner cushioning material]
[Assembly of the first component]
The corner cushioning material 10 is assembled by bending the sheet material 16 shown in FIG. In the first component 43, the inner folding pieces 67 and 68 are bent vertically with respect to the other side wall portion 55 at a bending position parallel to the core extending direction TD. The inner folding pieces 67 and 68 are bent so that the back surface of the sheet material 16 is concave. In a state where the inner folding pieces 67 and 68 are bent in this way, one plate portion 56 is bent perpendicularly to the other side wall portion 55 at a bending position parallel to the flow direction MD, and the one plate portion 56. One side wall portion 57 is bent vertically at a bending position parallel to the flow direction MD, and one backing piece 58 is bent to the one side wall portion 57 at a bending position parallel to the flow direction MD. Bend vertically with When one side wall portion 57 is bent with respect to one plate portion 56, one guide piece 48 is bent at a position where the bent position is extended. One plate portion 56, one side wall portion 57, and one backing piece 58 are bent so as to be wound in a state where the back surface of the sheet material 16 is concave.

  In addition, the first insole portion 28 is folded and reversed at the folding position parallel to the flow direction MD with respect to the other backing piece 61. The first insole portion 28 is folded in a state where the back surface of the sheet material 16 is convex. The first insole portion 28 is folded back, the other plate portion 59 is bent perpendicularly to the other side wall portion 55 at a bending position parallel to the flow direction MD, and the other plate portion 59 is bent to the other side. The side wall portion 60 is bent perpendicularly at a folding position parallel to the flow direction MD, and the other backing piece 61 is bent perpendicularly to the other side wall portion 60 at a folding position parallel to the flow direction MD. . When the other side wall portion 60 is bent with respect to the other plate portion 59, the other guide piece 49 is bent at a position where the bending position is extended. The other plate portion 59, the other side wall portion 60, and the other backing piece 61 are bent so as to be wound in a state where the back surface of the sheet material 16 is concave.

  In this manner, the one plate portion 56, the one side wall portion 57 and the one backing piece 58 are folded and the first insole portion 28 is folded, and the other plate portion 59, the other side wall portion 60 and the other The backing pieces 61 are bent, and the backing pieces 58 and 61 and the first insole portion 28 are fitted into the notched grooves 130 of the inner folding pieces 67 and 68, respectively. The inner folding pieces 67 and 68 are fitted into the notch grooves 131 of the 1 insole portion 28. With the first insole portion 28 thus protruding from the one side portion 101, the outer frame portion 25 is formed into a cylindrical shape having a rectangular cross section as shown in FIG. In this state, the bent piece 64 is bent perpendicularly to the one plate portion 56 at a bending position parallel to the center extending direction TD, and the bent piece 64 is bent to the other plate portion 59. Then, it is bent vertically at a bending position parallel to the center extending direction TD. Each of the bent pieces 63 and 64 is bent so as to close the tube of the first outer frame portion 25 in a state where the back surface of the sheet material 16 is concave.

  Further, the end wall portion 63 is bent perpendicularly to the other side wall portion 55 at a bending position parallel to the core extending direction TD, and the insertion bent piece 32 is extended to the end wall portion 63. Bend vertically at the folding position parallel to the current direction TD. The end wall portion 63 and the bent insertion piece 32 are bent in a state where the back surface of the sheet material 16 is concave, and the end wall portion 63 covers the bent pieces 63 and 64 with the cylinder of the first outer frame portion 25. Then, the bent insertion piece 32 is inserted into the cylinder of the first outer frame portion 25. In this way, when inserting the bending insertion piece 32 into the cylinder of the first outer frame portion 25, a notch groove 73 is formed in the bending insertion piece 32, and the backing pieces 58 and 61 and the first insole portion 28 are formed. Since the notch grooves 129 are formed in the first and second grooves, mutual interference can be avoided. In this way, the first component 43 is assembled.

[Assembly of second component]
The second component 44 is folded and assembled in substantially the same manner as the first component 43. In the second component 44, since the second insole portion 29 is provided instead of the first insole portion 28, the second insole portion 29 is similarly folded with respect to the other backing piece 61, The other plate portion 59, the other side wall portion 60, and the other backing piece 61 are bent. Further, in assembling the second component 44, since the guide pieces 48 and 49 do not exist, this bending is unnecessary. The second component 44 has bent pieces 75 and 76 connected to the plate portions 57 and 60, and the bent pieces 75 and 76 are extended to the center portions of the plate portions 57 and 60. Bend vertically at the folding position parallel to the current direction TD. The bent pieces 75 and 76 are bent in a state where the back surface of the sheet material 16 is concave. Others are the same as the assembly of the first component 43.

[Bending of first and second components]
In a state where the first and second components 43 and 44 are assembled, the corner cushioning material 10 is in a state as shown in FIG. From this state, the other side wall 55 of the second component 44 is perpendicular to the other side wall 55 of the first component 43 at a bending position parallel to the core extending direction TD existing in the connecting portion 27. Bend. Each other side wall part 55 is bent so that the back surface of the sheet material 16 is concave. In this way, the first and second component parts 43 and 44 are bent, and the second outer frame part 26 is bent vertically with respect to the first outer frame part 25. In this state, the engaging portions 45 and 46 of the first and second insole portions 28 and 29 are engaged with each other to complete the corner cushioning material 10 as shown in FIG. In this way, the corner cushioning material 10 is assembled by the single corrugated sheet material 16.

  In such a corner cushioning material 10, the outer frame 14 is formed in a cylindrical shape, and has higher strength than a single wall structure. Although the packing form of the packaged object by the corner cushioning material 10 will be described later, the packaged packaged object packed by using the corner cushioning material 10 is stacked in a state where the insole thickness direction z is parallel to the vertical direction. It can be stored so that it does not collapse. Further, in this state, since the core extending direction TD of the corrugated cardboard sheet material 16 is parallel to the vertical direction, a high strength can be obtained.

[Second Embodiment]
[Overall configuration]
FIG. 5 is a perspective view of the corner cushioning material 10A according to the second embodiment of the present invention as viewed from the outside. FIG. 6 is a perspective view showing the corner cushioning material 10A of the second embodiment in the state of being assembled. In the corner cushioning material 10A of the second embodiment, portions corresponding to the corner cushioning material 10 of the first embodiment are denoted by the same reference numerals, and only different configurations will be described. The corner cushioning material 10 </ b> A of the second embodiment is used for packing a plate-shaped article to be packed, like the corner cushioning material 10 of the first embodiment. In addition to the outer frame 14 and the insole 15, the corner cushioning material 10 </ b> A of the second embodiment includes a reinforcing body that is attached to the outer frame 14 and improves strength against external force. The reinforcing body includes a corner portion reinforcing body 17 and first and second outer frame reinforcing bodies 18a and 18b.

  As shown in FIG. 6, the corner reinforcing body 17 is provided at a bent portion of the outer frame 14 where the first and second outer frame portions 25 and 26 are continuous. The corner portion reinforcing body 17 is provided by being inserted into the outer frame 14.

  As shown in FIGS. 5 and 6, the first outer frame reinforcement body 18 a is attached to the first outer frame portion 25, avoiding the bent portion where the first and second outer frame portions 25, 26 are continuous. The first outer frame reinforcement body 18a is attached to the intermediate portion from the outer side while avoiding both axial ends of the first outer frame portion 25. The second outer frame reinforcing body 18b is attached to the second outer frame portion 26 while avoiding a bent portion where the first and second outer frame portions 25 and 26 are continuous. The second outer frame reinforcement body 18b is attached to the intermediate portion from the outer side while avoiding both axial ends of the second outer frame portion 26.

  In the second embodiment, both the corner reinforcing body 17 and each outer frame reinforcing body 18 are provided, but as another embodiment of the present invention, a configuration in which only the corner reinforcing body 17 is provided, A configuration in which only each outer frame reinforcement 18 is provided may be employed.

[Corner reinforcement]
[Overall structure]
FIG. 7 is a perspective view showing a state before the corner reinforcement 17 is bent. The corner portion reinforcing body 17 is connected to the first corner portion reinforcing body portion 103 inserted into the first outer frame portion 25 and the first corner portion reinforcing body portion 103, and is inserted into the second outer frame portion 26. And a corner reinforcing body portion 104.

[First corner reinforcement part]
8 is a cross-sectional view taken along section line S8-S8 in FIG. In FIG. 8, the left side is the inner side of the corner cushioning material 10A, and the right side is the outer side of the corner cushioning material 10A. Referring to FIGS. 7 and 8, the first corner reinforcing body portion 103 includes a plurality of first corner reinforcing walls 82 and 83 parallel to the axis L1 of the first outer frame portion 25 and the insole thickness direction z, It has a plurality of first reinforcing plates 85 to 88 that are continuous with the first corner reinforcing walls 82 and 83 and are perpendicular to the insole thickness direction z. In the second embodiment, the first corner reinforcing body 103 includes two first corner reinforcing walls 82 and 83 and four first reinforcing plates 85 to 88.

  The first corner portion reinforcing walls 82 and 83 are provided in parallel to the side wall portions 101 and 55 of the first outer frame portion 25. One first corner reinforcing wall 82 is provided along the other side wall portion 55 in contact with the other side wall portion 55 of the first outer frame portion 25. The other first corner reinforcing wall 83 is provided in parallel to the one first corner reinforcing wall 82 with an interval inward. Each of the first corner reinforcing walls 82 and 83 has a plurality of end portions arranged on the other end side in the axial direction of the first outer frame portion 25 on the depth side of the paper surface in FIG. 84 and connected via each connecting piece 84. Each of the first corner reinforcing walls 82 and 83 has a notch groove 105 formed in a portion disposed on the other end side in the axial direction of the first outer frame portion 25. The respective backing pieces 58 and 61 and the first insole portion 28 of the first outer frame portion 25 are fitted.

  Each of the first reinforcing plates 85 to 88 is divided into two sets of two. The two first reinforcing plates 85, 86 in one set are parallel to the one plate portion 56 of the first outer frame portion 25, and the first corner reinforcing walls 82, 83, the one plate portion 56, Between the two. Each of the first reinforcing plates 85 and 86 of one set are connected to each other at the end portions on the inner side, are reversed and folded, and are in contact with each other. Each of the first reinforcing plates 85 and 86 of the one set has an inner end abutting against one side wall portion 101 of the first outer frame portion 25, and an outer end portion of the first reinforcing plate 85, 86. It abuts against the other side wall 55.

  The guide pieces 48 and 49 and the bent pieces 75 and 76 of the present embodiment are formed shorter than the above-described embodiment by the thickness T1 of the second corner reinforcing walls 112 and 113. In a state where the second outer frame portions 25 and 26 are bent at a right angle, the respective end faces 48a, 49a; 75a, 76a are supported by being in contact with the second corner reinforcing wall 82, that is, in the thickness direction of the second outer frame portion, that is, The compressive strength in the x direction is improved.

  Of the first reinforcing plates 85 and 86 in one set, the first reinforcing plate 85 on the side of the first corner reinforcing walls 82 and 83 has an end on the outer side, and the first corner reinforcing portion on the one side. One end of the wall 82 on the side of the one plate portion 56 (the end on the upper side in FIG. 8) is vertically bent and connected. Of the first reinforcing plates 85 and 86 of the one set, the first reinforcing plate 85 on the first corner reinforcing wall 82 and 83 side is one plate portion of the other first corner reinforcing wall 83. It is in contact with the end portion on the 56 side (the upper end portion in FIG. 8). Of the first reinforcing plates 85, 86 in one set, the first reinforcing plate 86 on the one plate portion 56 side is provided along the one plate portion 56 in contact with the one plate portion 56.

  The two first reinforcing plates 87 and 88 of the other set are parallel to the other plate portion 59 of the first outer frame portion 25, and the first corner reinforcing walls 82 and 83, the other plate portion 59, Between the two. The first reinforcing plates 87 and 88 of the other set are connected to each other at the inner ends thereof, are reversed and folded, and are in contact with each other. Each of the first reinforcing plates 87 and 88 of the other set has an inner end abutting against one side wall portion 101 of the first outer frame portion 25, and an outer end portion of the first outer frame portion 25. It abuts against the other side wall 55.

  Of the first reinforcing plates 87 and 88 of the other set, the first reinforcing plate 87 on the side of the first corner reinforcing walls 82 and 83 has an end on the outer side, and the first corner reinforcing portion on one side. The wall 82 is vertically bent and connected to an end portion on the other plate portion 59 side (lower end portion in FIG. 8). Among the first reinforcing plates 87 and 88 of the other set, the first reinforcing plate 87 on the first corner reinforcing wall 82 and 83 side is the other plate portion of the other first corner reinforcing wall 83. It abuts on the end portion on the 59 side (the end portion on the lower side in FIG. 8). Of the first reinforcing plates 87 and 88 of the other set, the first reinforcing plate 88 on the other plate portion 59 side is provided in contact with the other plate portion 59 and along the other plate portion 59.

[Second corner reinforcement]
FIG. 9 is a cross-sectional view taken along section line S9-S9 in FIG. In FIG. 9, the right side is the inner side of the corner cushioning material 10, and the left side is the outer side of the corner cushioning material 10. Referring to FIGS. 7 and 9, the second corner reinforcing body portion 104 includes a plurality of second corner reinforcing walls 112 and 113 parallel to the axis L2 of the second outer frame portion 26 and the insole thickness direction z, A plurality of second reinforcing plates 115 to 118 that are continuous with the second corner reinforcing walls 112 and 113 and are perpendicular to the insole thickness direction z are provided. In the second embodiment, the second corner portion reinforcing body portion 104 includes two second corner portion reinforcing walls 112 and 113 and four second reinforcing plates 115 to 118.

  The second corner portion reinforcing walls 112 and 113 are provided in parallel to the side wall portions 101 and 55 of the second outer frame portion 26. One second corner reinforcing wall 112 is provided along the other side wall 55 in contact with the other side wall 55 of the second outer frame portion 26. The other second corner reinforcing wall 113 is provided in parallel to the other second corner reinforcing wall 112 with an interval inward. One second corner reinforcing wall 112 has an end disposed on one end side in the axial direction of the second outer frame portion 26 on the near side in FIG. The first corner reinforcing wall 82 is connected to the end of the second outer frame 25 on the one end side in the axial direction.

  The other second corner reinforcing wall 113 has an end disposed on one end side in the axial direction of the second outer frame portion 26, and one first corner reinforcing wall 82 of the first corner reinforcing body portion 103. The second outer frame portion 25 is connected to the end portion on the one end side in the axial direction. Each of the second corner reinforcing walls 112 and 113 has a notch groove 106 formed in a portion disposed on the other axial end side of the second outer frame portion 26. The respective backing pieces 58 and 61 and the second insole portion 28 of the second outer frame portion 26 are fitted.

  Each of the second reinforcing plates 115 to 118 is divided into two sets of two. The two second reinforcing plates 115 and 116 of one set are parallel to the one plate portion 56 of the second outer frame portion 26, and the second corner reinforcing walls 112 and 113, the one plate portion 56 and the like. Between the two. The second reinforcing plates 115 and 116 of one set are in contact with each other by being inverted and folded over at the ends on the inner side. Each of the second reinforcing plates 115 and 116 of one set has an inner end abutting against one side wall 101 of the second outer frame portion 26, and an outer end portion of the second reinforcing plate 115, 116. It abuts against the other side wall 55.

  Of the second reinforcing plates 115 and 116 in one set, the second reinforcing plate 115 on the side of the second corner reinforcing walls 112 and 113 has an end on the outer side, and the second corner reinforcing portion on the one side. One end of the wall 112 on the side of the plate portion 56 (the end on the upper side in FIG. 9) is bent vertically and connected. Of the second reinforcing plates 115 and 116 in one set, the second reinforcing plate 115 on the second corner reinforcing wall 112 and 113 side is one plate portion of the other second corner reinforcing wall 113. It is in contact with the end portion on the 56 side (the upper end portion in FIG. 8). In addition, among the second reinforcing plates 115 and 116 of one set, the second reinforcing plate 116 on the one plate portion 56 side is provided in contact with the one plate portion 56 and along the one plate portion 56.

  The two second reinforcing plates 117 and 118 of the other set are parallel to the other plate portion 59 of the second outer frame portion 26, and the second corner reinforcing walls 112 and 113, the other plate portion 59, and the like. Between the two. The second reinforcing plates 117 and 118 of the other set are connected to each other at the inner ends, are reversed and folded, and are in contact with each other. Each of the second reinforcing plates 117 and 118 of the other set has an inner end abutting against one side wall 101 of the second outer frame portion 26, and an outer end portion of the second reinforcing plate 117, 118. It abuts against the other side wall 55.

  Of the second reinforcing plates 117 and 118 of the other set, the second reinforcing plate 117 on the side of the second corner reinforcing walls 112 and 113 has an end on the outer side and one second corner reinforcing plate. The wall 112 is continuously bent at the other plate 59 end (the lower end in FIG. 8). Among the second reinforcing plates 117 and 118 of the other set, the second reinforcing plate 117 on the second corner reinforcing wall 112 and 113 side is the other plate portion of the other second corner reinforcing wall 113. It abuts on the end portion on the 59 side (the end portion on the lower side in FIG. 8). Of the second reinforcing plates 117 and 118 of the other set, the second reinforcing plate 118 on the other plate portion 59 side is in contact with the other plate portion 59 and provided along the other plate portion 59.

[Sheet material for corner reinforcement]
FIG. 10 is a development view showing the corrugated board sheet material 120 forming the corner reinforcement 17 in a developed state before assembly. FIG. 10 shows the sheet material 120 as viewed from the back side. In FIG. 10, the broken line indicates the position where the valley is folded, and the alternate long and short dash line indicates the position where the mountain is folded. In order to facilitate understanding, one of the flow directions MD in the upper direction in FIG. 10 is referred to as the upper direction, and the other flow direction MD in the lower direction in FIG. 10 is referred to as the lower direction. One side of the TD is referred to as the left side, and the other side of the center core extending direction TD, which is the right side in FIG.

  On the left side of one first corner reinforcing wall 82 in the first corner reinforcing body portion 103 of the corner reinforcing body 17, the other first corner reinforcing wall 83 is provided continuously through each connecting piece 84. It is done. In addition, one set of first reinforcing plates 85 and 86 is provided on the upper side of one first corner reinforcing wall 82, and the other set is provided on the lower side of one first corner reinforcing wall 82. The first reinforcing plates 87 and 88 are provided in a row.

  One second corner reinforcing wall 112 in the second corner reinforcing body portion 104 of the corner reinforcing body 17 is provided continuously to the right side of one first corner reinforcing wall 82 and the other second corner. The partial reinforcing wall 113 is provided continuously to the left side of the other first corner reinforcing wall 83. Further, one set of the second reinforcing plates 115 and 116 is provided on the upper side of the one second corner reinforcing wall 112, and the other set is provided on the lower side of the one second corner reinforcing wall 112. The second reinforcing plates 117 and 118 are provided in a row.

[Assembly of corner reinforcement]
The corner reinforcing body 17 is assembled by bending the sheet material 120 shown in FIG. Each connecting piece 84 is bent perpendicularly to one first corner reinforcing wall 82 at a bending position parallel to the flow direction MD, and the other first corner reinforcing wall 83 is connected to each connecting piece 84. Is folded vertically at a folding position parallel to the flow direction MD. At this time, the sheet material 120 is bent so that the back surface side is concave and the back surfaces of the first corner reinforcing walls 82 and 83 face each other.

  Further, the first reinforcing plates 85 and 86 of one set connected to the upper side of the one first corner reinforcing wall 82 are folded together. That is, the other first reinforcing plate 86 is folded and reversed at the bending position parallel to the center core extending direction TD with respect to the first reinforcing plate 85 on the one first corner reinforcing wall 82 side. At this time, the first reinforcing plates 85 and 86 of one set are folded so that the back surface is convex. The first reinforcing plates 85 and 86 of one set folded in this way are bent vertically with respect to the first corner reinforcing wall 82 at a bending position parallel to the core extending direction TD. . At this time, the first reinforcing plates 85 and 86 of one set are bent so that the back surface is concave.

  Further, the first reinforcing plates 87 and 88 of the other set connected to the lower side of the one first corner reinforcing wall 82 are folded together. That is, another first reinforcing plate 88 is folded and reversed at the bending position parallel to the center core extending direction TD with respect to the first reinforcing plate 87 on the one first corner reinforcing wall 82 side. At this time, the first reinforcing plates 87 and 88 of the other set are folded so that the back surface is convex. The first reinforcing plates 87 and 88 of the other set folded in this way are bent perpendicularly to one first corner reinforcing wall 82 at a bending position parallel to the center core extending direction TD. . At this time, the first reinforcing plates 87 and 88 of the other set are bent so that the back surface is concave.

  In addition, one set of the second reinforcing plates 115 and 116 connected to the upper side of the one second corner reinforcing wall 112 is folded over each other. That is, another second reinforcing plate 116 is folded and inverted at the bending position parallel to the center extending direction TD with respect to the second reinforcing plate 115 on the side of the one second corner reinforcing wall 112. At this time, the second reinforcing plates 115 and 116 of one set are folded so that the back surface is convex. Each pair of the second reinforcing plates 115 and 116 folded in this way is bent vertically with respect to one second corner reinforcing wall 112 at a bending position parallel to the center core extending direction TD. . At this time, the second reinforcing plates 115 and 116 in one set are bent so that the back surface is concave.

  Further, the second reinforcing plates 117 and 118 of the other set connected to the lower side of the one second corner reinforcing wall 112 are folded on each other. That is, another second reinforcing plate 118 is folded and inverted at the bending position parallel to the center extending direction TD with respect to the second reinforcing plate 117 on the second corner reinforcing wall 112 side. At this time, the second reinforcing plates 117 and 118 of the other set are folded so that the back surface is convex. The second reinforcing plates 117 and 118 of the other set folded in this way are bent vertically with respect to one second corner reinforcing wall 112 at a bending position parallel to the center core extending direction TD. . The second reinforcing plates 117 and 118 of the other set are bent so that the back surface is concave.

  Thus, the corner | angular part reinforcement body 17 of the state before bending and bending as shown in FIG. 7 is formed. From such a state, the corner reinforcement body 17 is completed by bending the first and second corner reinforcement bodies 103 and 104 to each other. In bending the first and second corner reinforcing body portions 103 and 104, one second corner reinforcing wall 112 is parallel to one core extending direction TD with respect to one first corner reinforcing wall 82. The other second corner reinforcing wall 113 is bent perpendicularly to the other first corner reinforcing wall 83 at a bending position parallel to the core extending direction TD. Bend. One second corner reinforcing wall 112 is bent so that the back surface is concave, and the other second corner reinforcing wall 113 is bent so that the back surface is convex.

[Inserting corner reinforcements into the outer frame]
In inserting the corner portion reinforcing body 17 into the outer frame 14, as shown in FIG. 6, one of the first and second outer frame portions 25 and 26 (in the example of FIG. 6, the first outer frame portion 25 is used). ) In a state before being assembled into a cylindrical shape, the corner portion reinforcing body 17 is partially placed in one of the first and second outer frame portions 25, 26 (second outer frame portion 26 in the example of FIG. 6). Insert. Thereafter, one of the first and second outer frame portions 25 and 26 in an unassembled state is assembled. In this way, the corner reinforcement 17 is inserted into the outer frame 14 and provided at the bent portion where the first and second outer frame portions 25 and 26 are continuous. When the first and second outer frame portions 25 and 26 are bent from this state, the corner portion reinforcing body 17 follows this and the first and second corner portion reinforcing body portions 103 and 104 are bent to each other. To do.

  When the first and second outer frame portions 25 and 26 are in a state before being bent, the corner portion reinforcing body 17 is configured to be displaceable in the axial direction with respect to the outer frame 14, and thus loosely It is inserted. Accordingly, when the first and second outer frame portions 25 and 26 are bent, the corner reinforcing body 17 is displaced following this, and the bending position of the outer frame 14 and the bending position of the corner reinforcing body 17 are determined. Since the alignment is automatically performed, the first and second outer frame portions 25 and 26 can be smoothly bent.

  By providing such a corner reinforcement 17, the bent portion of the outer frame 14 can be reinforced. In addition, the first corner reinforcing walls 82 and 83 and the second corner reinforcing walls 112 and 113 are reinforced against the external force in the insole thickness direction z, and the packed objects are packed in a stacked state. Resistance to large external forces in the vertical direction due to the weight of the object can be obtained. The first reinforcing plates 85 to 88 and the second reinforcing plates 115 to 118 can reinforce the outer frame 14 against an external force that tends to crush the side wall portions 101 and 55 closer to each other.

  Further, in each of the first corner reinforcing walls 82 and 83 and each of the first reinforcing plates 85 to 88, the core extending direction TD is parallel to the axis L1 of the first outer frame portion 25, and each second corner reinforcing wall is 82 and 83 and the second reinforcing plates 115 to 118, the center extending direction TD is parallel to the axis L1 of the second outer frame portion 26. Therefore, the external force in the vertical direction and the side wall portions 101 and 55 are The corner reinforcement 17 is configured to easily self-break against an external force that tries to crush it closer. As a result, when an impact is applied due to a drop during transportation of the packed article, the corner reinforcing body 17 can self-destruct and absorb the impact energy, and a large impact force is applied to the article to be packed. Can be prevented. Further, the first corner reinforcing walls 82 and 83 are provided at intervals, and the second corner reinforcing walls 112 and 113 are provided at intervals, thereby avoiding mutual interference during the self-destruction described above. It is prevented that self-destruction is prevented undesirably.

[First outer frame reinforcement]
FIG. 11 is a perspective view showing the first outer frame reinforcing body 18a. The first outer frame reinforcing body 18a includes a first base wall 91a and a plurality of first outer frame reinforcing walls 22a and 23a provided to be connected to the first base wall 91a. In the second embodiment, the first outer frame reinforcing body 18a has two first outer frame reinforcing walls 22a and 23a. The first base wall 91a is a plate having a rectangular plane, and the first outer frame reinforcing walls 22a and 23a are connected to a pair of parallel side portions of the first base wall 91a and are perpendicular to the first base wall 91a. Is bent.

  12 is a cross-sectional view taken along section line S12-S12 in FIG. FIG. 13 is a cross-sectional view taken along section line S13-S13 in FIG. The left side of FIG. 12 and the lower side of FIG. 13 are the inner sides of the corner cushioning material 10A, and the right side of FIG. 12 and the upper side of FIG. 13 are the outer sides of the corner cushioning material 10A. As shown in FIGS. 12 and 13, the first base wall 91 a is parallel to the axis L <b> 1 of the first outer frame portion 25 and the insole thickness direction z. The first base wall 91 a is provided so as to be flush with the other side wall portion 55 of the first outer frame portion 25.

  Each of the first outer frame reinforcing walls 22 a and 23 a is bent vertically inward from the first base wall 91 a and is provided perpendicular to the axis L <b> 1 of the first outer frame portion 25. The first outer frame reinforcing walls 22 a and 23 a are provided at intervals in the axial direction of the first outer frame portion 25. The first outer frame reinforcing walls 22 a and 23 a are in contact with the plate portions 56 and 59 of the first outer frame portion 25 and are in contact with the one side wall portion 101 of the first outer frame portion 25.

[Sheet material of first outer frame reinforcement]
FIG. 14 is a development view showing the corrugated sheet material 121 forming the first outer frame reinforcing body 18a in a developed state before assembly. FIG. 14 shows the sheet material 121 as viewed from the back side, and in FIG. 14, the broken line indicates the position where the valley is folded. One first outer frame reinforcing wall 22a is provided on one side of the first base wall 91a in the flow direction (left side of FIG. 14), and the other side of the first base wall 91a in the flow direction (right side of FIG. 14). The other first outer frame reinforcing wall 22a is provided in a row.

[Assembly of first outer frame reinforcement]
The first outer frame reinforcing body 18a is assembled by bending the sheet material 121 shown in FIG. One first outer frame reinforcing wall 22a is bent perpendicularly to the first base wall 91a at a bending position parallel to the center extending direction TD, and the other first first frame reinforcing wall 22a is bent to the second base wall 91a. The outer frame reinforcing wall 23a is bent vertically at a bending position parallel to the center core extending direction TD. At this time, the sheet material 121 is bent so that the back side is concave. In this way, the bent first outer frame reinforcing body 18a is completed.

[Attaching the first outer frame reinforcement to the outer frame]
The opening 135 is formed in the other side wall portion 55 of the first outer frame portion 25 as described above. The first outer frame reinforcement body 18 a is inserted from the opening 135 and attached to the first outer frame portion 25. When inserting the first outer frame reinforcing body 18a, notch grooves 93 are formed in each first outer frame reinforcing wall 22a, 23a as shown in FIG. The notch 131 of the first insole 28 can also be used to avoid mutual interference.

  In this way, the first outer frame reinforcement body 18a is attached to the first outer frame portion 25. As shown in FIG. 13, in a state where the first outer frame reinforcing body 18a is attached to the first outer frame portion 25, one first outer frame reinforcing wall 22a abuts against one backing piece 67, The first outer frame reinforcing wall 23 a is provided along one backing piece 67, and is in contact with the other backing piece 68 and provided along the other backing piece 68.

  By providing such a first outer frame reinforcing body 18a, the intermediate portion in the axial direction of the first outer frame portion 25 can be reinforced. The first outer frame reinforcing walls 22a and 23a in the first outer frame reinforcing body 18a are in contact with the plate portions 56 and 59 of the first outer frame portion 25, in a state where the packed objects to be packed are stacked. It is possible to reinforce against a large external force in the vertical direction due to the load of the object to be packed. Moreover, in each 1st outer frame reinforcement wall 22a, 23a, the center core extension direction TD is parallel to the insole thickness direction z, and big tolerance is acquired with respect to the external force of the above-mentioned perpendicular direction.

[Second outer frame reinforcement]
Referring to FIG. 6, the second outer frame reinforcing body 18 b includes a second base wall 91 b and a plurality of second outer frame reinforcing walls 22 b and 23 b provided continuously to the second base wall 91 b. In the second embodiment, the second outer frame reinforcing body 18b has two second outer frame reinforcing walls 22b and 23b. The second outer frame reinforcing body 18b has a symmetric configuration with the first outer frame reinforcing body 18a, the second base wall 91b corresponds to the first base wall 91a, and one second outer frame reinforcing wall 22b is Corresponding to one first outer frame reinforcing wall 22a, the other second outer frame reinforcing wall 23b corresponds to the other first outer frame reinforcing wall 23a. Therefore, detailed illustration and description of the second outer frame reinforcing body 18b are omitted, and only an important configuration will be described.

  The second outer frame reinforcement body 18 b is inserted from the opening formed in the second outer frame portion 26 in the same manner as the opening formed in the first outer frame portion 25 and is attached to the second outer frame portion 26. . The second base wall 91b is parallel to the axis L2 of the second outer frame portion 26 and the insole thickness direction z. The second base wall 91b is provided so as to be flush with the other side wall portion 55 of the second outer frame portion 26.

  Each of the second outer frame reinforcing walls 22 b and 23 b is bent vertically inward from the second base wall 91 b and is provided perpendicular to the axis L <b> 2 of the second outer frame portion 26. Each of the second outer frame reinforcing walls 22 b and 23 b is provided with an interval in the axial direction of the second outer frame portion 26. The second outer frame reinforcing walls 22 b and 23 b are in contact with the plate portions 56 and 59 of the second outer frame portion 26 and are in contact with the one side wall portion 101 of the second outer frame portion 26. One second outer frame reinforcing wall 22b is in contact with one backing piece 67 and is provided along one backing piece 67, and the other second outer frame reinforcing wall 23b is the other backing piece. 68 and is provided along the other backing piece 68.

  By providing such a second outer frame reinforcing body 18b, the intermediate portion in the axial direction of the second outer frame portion 26 can be reinforced. The second outer frame reinforcement walls 22b and 23b in the second outer frame reinforcement body 18b are in contact with the plate portions 56 and 59 of the second outer frame portion 26, and in a state where the packed objects to be packed are stacked. It is possible to reinforce against a large external force in the vertical direction due to the load of the object to be packed. Moreover, in each 2nd outer frame reinforcement wall 22b, 23b, the center core extension direction TD is parallel to the insole thickness direction z, and big tolerance is acquired with respect to the external force of the above-mentioned perpendicular direction.

[Packing equipment]
[Outline of packing equipment]
FIG. 15 is a perspective view showing a state in the middle of packing two solar battery panels 12 by the packing device 11. FIG. 16 is a perspective view showing a state in which two solar cell panels 12 are packed by the packing device 11. The packing device 11 includes four corner cushioning materials 10A of the second embodiment described above, and further includes two cover materials 35 and 36 and a binding material 37. The packing device 11 is a device for packing two solar battery panels 12 in a stacked manner.

[Solar panel]
The solar cell panel 12 that is an object to be packaged is a plate-like body having a pair of relatively large areas of planes and surrounding side surfaces. The form shown in FIG. 15 has a pair of rectangular planes and four side surfaces. In the solar cell panel 12, one corner is formed by one plane and two side surfaces, and thus has eight corners formed by the three surfaces. Each corner has three ridges extending from one place in three directions perpendicular to each other. The ridge line part is a part in which two surfaces are bent in a convex shape, and the three ridge line parts in one corner part are ridge line parts formed by one plane and one of two side surfaces, A ridge line portion formed by one plane and the other of the two side surfaces and a ridge line portion formed by the two side surfaces. A ridge line portion formed by two side surfaces in one corner portion is connected to a ridge line portion formed by two side surfaces in another other corner portion. In the solar cell panel, two corners where the ridge lines formed by these two side faces are connected to each other as one set, and four sets have a total of eight corners.

[Corner protection]
The two solar cell panels 12 are stacked with their side surfaces aligned. One corner cushioning material 10 </ b> A has an insole 15 inserted between each solar cell panel 12, and a ridge formed by two side surfaces of each solar cell panel 12 has an outer frame 14 of the corner cushioning material 10 </ b> A. It is provided so as to fit in the bent portion.

  The corner cushioning material 10 </ b> A is a part of one side of the insole thickness direction with respect to the insole 15, and crosses the entire ridge line portion formed by the two side surfaces of one of the two solar cell panels 12. The side wall portion 101 is covered with the ridgeline portion and the side surface in the vicinity of the ridgeline portion. The corner cushioning material 10A covers the solar cell panel 12 so as to traverse the ridge formed by the two side surfaces of the solar cell panel 12, but is formed by one plane and one side surface of the solar cell panel. Do not cross the ridgeline.

  In this way, the two corners of one solar cell panel 12 are protected by one corner cushioning material 10A. In addition, the one side wall portion 101 of the outer frame 14 is crossed across the entire ridge line portion formed by the two side surfaces of the other two solar cell panels 12 at the other side of the insole thickness direction with respect to the insole 15. The ridgeline part and the side surface near the ridgeline part are brought into contact with and covered. Thereby, also about the other solar cell panel 12, two corners are protected by one corner cushioning material 10A. In this way, two corners of the two solar radio wave panels 12 can be protected by one corner cushioning material 10A.

  The remaining three corner cushioning materials 10A are used in the same manner to protect the corners of the two solar radio wave panels 12 two by two. In this way, a total of 16 corners can be protected by the four corner cushioning materials 10A.

[Wrapping]
Thus, the protected solar cell panel 12 in a state where each corner portion is protected by each corner cushioning material 10A is covered by the two cover members 35 and 36 from both sides in the thickness direction. One cover member 35 covers the protected solar cell panel 12 from one side in the thickness direction (the lower side in FIG. 15) and covers a pair of parallel side surfaces of each solar cell panel 12 while protecting the protected solar cell panel. 12 is partially covered from the other side in the thickness direction (the upper side in FIG. 15). In this state, the other cover 36 covers the protected solar cell panel 12 from the other side in the thickness direction (the upper side in FIG. 15), and covers another pair of parallel side surfaces of each solar cell panel 12. The cover members 35 and 36 are bound together by a band-like binding member 37 made of polypropylene (PP) or the like. The packed solar cell panels 12 packed in this way are stacked and stored, for example, in several sets. In this packing device 11, since each corner cushioning material 10A has a large strength, it can be prevented from collapsing for a long time in a stacked state, and can be suitably used for, for example, export.

[Other Embodiments]
Although the packing device 11 is configured using the corner cushioning material 10A of the second embodiment, it may be configured using the corner cushioning material 10 of the first embodiment. Moreover, the corner | angular part reinforcement body 17 may be formed from the sheet | seat material from which the center core extension direction TD differs 90 degree | times. In this case, it is possible to obtain even greater resistance to external forces in the vertical direction. In addition, the corner cushioning material 10, 10 </ b> A has been described as a configuration that covers only the ridge line portion formed by the two side surfaces of the solar cell panel 12 that is an object to be packed and the vicinity thereof, but the first and second outer frame portions 25, It is good also as a structure which lengthens 26 so that it may mutually contact | abut with the outer frame of another corner buffer material 10 and 10A, and covers the side surface of the solar cell panel 12 over the whole area | region.

It is the perspective view which looked at the corner shock absorbing material 10 of 1st Embodiment of this invention from the inner side. It is sectional drawing seen from cut surface line S2-S2 of FIG. It is a perspective view which shows the corner shock absorbing material 10 of the state before the 1st and 2nd outer frame parts 25 and 26 are bent. It is an expanded view which shows the corrugated sheet material 16 which forms the outer frame 14 and the insole 15 in the expanded state before an assembly. It is the perspective view which looked at 10A of corner buffer materials of 2nd Embodiment of this invention from the outer side. It is a perspective view which shows 10A of corner cushioning materials of 2nd Embodiment in the state in the middle of an assembly. It is a perspective view shown in the state before bending the corner | angular part reinforcement body 17. FIG. It is sectional drawing seen from cut surface line S8-S8 of FIG. It is sectional drawing seen from cut surface line S9-S9 of FIG. FIG. 5 is a development view showing a corrugated sheet material 120 forming the corner reinforcing body 17 in a developed state before assembly. It is a perspective view which shows the 1st outer frame reinforcement body 18a. It is sectional drawing seen from cut surface line S12-S12 of FIG. It is sectional drawing seen from cut surface line S13-S13 of FIG. It is an expanded view which shows the corrugated board sheet material 121 which forms the 1st outer frame reinforcement body 18a in the expanded state before an assembly. It is a perspective view which shows the state in the middle of packing two solar cell panels 12 with the packing apparatus 11. FIG. It is a perspective view which shows the state which packed two solar cell panels 12 with the packing apparatus 11. FIG. It is a perspective view which shows the packing apparatus 1 of a prior art. It is a perspective view which shows the corner shock absorbing material 5 which comprises the packaging apparatus of another prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Corner cushioning material 14 Outer frame 15 Insole 17 Corner | angular part reinforcement 18a 1st outer frame reinforcement 18b 2nd outer frame reinforcement 22a, 23a 1st outer frame reinforcement wall 25 1st outer frame part 26 2nd outer frame part 28 First insole portion 29 Second insole portion 45, 46 Engaging portion 55 Other side wall portion 56 One plate portion 59 Other plate portion 82, 83 First corner reinforcing wall 85-88 First reinforcing plate 91a First base wall DESCRIPTION OF SYMBOLS 101 1 side wall part 103 1st corner | angular part reinforcement body part 104 2nd corner | angular part reinforcement body part 112,113 2nd corner | angular part reinforcement wall 115-118 2nd reinforcement board

Claims (7)

Used to stack a plurality of plate-shaped packages having a pair of planes and surrounding side surfaces, and protect corners formed by one plane and two sides of each package. A corner cushioning material,
A first outer frame portion and a second outer frame portion bent and connected to the first outer frame portion, wherein the first and second outer frame portions have a cross-sectional shape perpendicular to the longitudinal axis. An outer frame formed in a rectangular cylinder,
Projecting perpendicularly from one side wall portion of the first and second outer frame portions to the one side wall portion, being in a plate shape parallel to the axis of the first and second outer frame portions, and inserted between the packed items With an insole,
The outer frame covers the object to be packaged such that one side wall of the first and second outer frame parts crosses a ridge line formed by two side surfaces of the corner of each object to be packed. Characteristic corner cushioning material. The article to be packed is a plate-like body having a pair of rectangular planes and surrounding four side surfaces,
The first outer frame portion has a longitudinal axis parallel to a first direction perpendicular to the thickness direction of the insole, and the second outer frame portion is bent vertically to the first outer frame portion. ,
The first and second outer frame portions each have two side wall portions parallel to the thickness direction of the insole and two plate portions perpendicular to the thickness direction of the insole, and each side wall portion is a plate portion. Are connected to each other and formed into a cylindrical shape having a rectangular cross section perpendicular to the axis,
The corner cushioning material according to claim 1, wherein the one side wall portion is one of the two side wall portions of the first and second outer frame portions. The insole has a first insole portion continuous with the first outer frame portion and a second insole portion continuous with the second outer frame portion,
The corner cushioning material according to claim 1 or 2, wherein the first and second insole portions each have an engaging portion that is engaged with each other.   The corner cushioning material according to any one of claims 1 to 3, further comprising a reinforcing body that is attached to the outer frame and improves strength against external force. The reinforcing body has a corner reinforcing body provided at a bent portion where the first and second outer frame portions are continuous,
The corner reinforcing body includes a first corner reinforcing body portion that is inserted into the first outer frame portion, and a second corner portion reinforcement that is connected to the first corner portion reinforcing body portion and is inserted into the second outer frame portion. Having a body part,
The first corner portion reinforcing body portion includes a plurality of first corner portion reinforcing walls parallel to the axis of the first outer frame portion and the thickness direction of the insole, and the first corner portion reinforcing wall. A plurality of first reinforcing plates perpendicular to the thickness direction;
The second corner portion reinforcing body portion includes a plurality of second corner portion reinforcing walls parallel to the axis of the second outer frame portion and the thickness direction of the insole, and the second corner portion reinforcing wall. The corner cushioning material according to claim 4, further comprising a plurality of second reinforcing plates perpendicular to the thickness direction. The reinforcing body includes a first outer frame reinforcing body attached to the first outer frame portion, avoiding a bent portion where the first and second outer frame portions are continuous, and the first and second outer frame portions. Having a second outer frame reinforcing body attached to the second outer frame part, avoiding the continuous bent part,
The first outer frame reinforcement is connected to the first base wall parallel to the axis of the first outer frame and the thickness direction of the insole, and is connected to the first base wall, and is perpendicular to the axis of the first outer frame. A plurality of first outer frame reinforcing walls,
The second outer frame reinforcement body is connected to the second base wall parallel to the axis of the second outer frame and the thickness direction of the insole, and is connected to the second base wall, and is perpendicular to the axis of the second outer frame. The corner cushioning material according to claim 4, further comprising a plurality of second outer frame reinforcing walls. A packing device for packing a plurality of plate-shaped objects to be packed,
The corner cushioning material according to any one of claims 1 to 6, which protects a corner portion of each packaged object,
Two cover materials for covering each object to be packed whose corners are protected by a corner cushioning material from both sides in the thickness direction of the object to be packed;
A packaging apparatus comprising: a binding material that binds the two cover materials.

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