JP5626131B2 - Corner protective material - Google Patents

Description

  The present invention relates to a corner protective material, in particular, a corrugated cardboard that is protected from the outer peripheral side together with the package by an exterior material that protects each corner in the plan view of the substantially rectangular parallelepiped package and covers the side of the package. It is related with the corner protection material made.

2. Description of the Related Art Conventionally, there is a packing apparatus that packs a substantially rectangular parallelepiped packaged object. This packing apparatus mainly covers a pallet on which an object to be packed is placed, a corner protection member that protects each corner portion in plan view of the object to be packed, and a side surface of the object to be packed together with a corner protection material from the outer peripheral side. And an exterior material. When a corrugated cardboard material is used as the corner protection material, the corrugated cardboard material is laminated and formed in a substantially L shape in plan view , similar to that shown in Patent Document 1 (Japanese Patent Laid-Open No. 8-25530) . (See FIG. 11) is used.

  In the above conventional packing device, since the corner protective material is formed by stacking corrugated cardboard materials, the corner protective material is less deformed with respect to the load from the side of the object to be packed, and the corner of the object to be packed is protected. Was good, but the amount of corrugated board material tended to increase.

  An object of the present invention is to provide a corrugated cardboard corner protective material capable of suppressing deformation due to a load from the side of an object to be packed while reducing the amount of corrugated cardboard material used.

The corner protective material made of corrugated cardboard according to the first aspect protects each corner portion in the plan view of the packaged object in the packaging device for packaging the packaged object having a substantially rectangular parallelepiped shape. It is covered from the outer peripheral side together with the article to be packed by the exterior material that covers. In the corner protective material, the first and second inner side surface portions and the first and second outer side surface portions are formed by bending one cardboard material. The first inner side surface is in surface contact so as to sandwich the corner portion from the outer peripheral side of the packaged object in a plan view of the packaged object, and from the corner top corresponding to the apex of the corner part to the outer peripheral surface of the packaged object. It is a surface part extended toward the 1st corner edge part located in the side far from a corner top part along. The second inner side surface is in surface contact so that the corner portion is sandwiched from the outer peripheral side of the packaged item in plan view of the packaged item, and from the corner top corresponding to the apex of the corner unit to the outer circumferential surface of the packaged item. It is a surface part extended toward the 2nd corner edge part located in the far side of the direction orthogonal to a 1st inner surface part from a corner top part along. The first and second outer surface portions are located on the outer peripheral side from the first and second corner ends toward the outer peripheral side of the corner and in contact with the exterior material in the plan view of the package object. It is a surface part that extends straight. Here, the first inner side surface portion, the second inner side surface portion, the first outer side surface portion, and the second outer side surface portion form a hollow space in which two triangles are combined in a plan view of the packaged object. Then, in a plan view of the article to be packed, the corrugated cardboard material has a first inner side surface portion, a second inner side surface portion, a second outer side surface portion, a first outer side surface portion, a first inner side surface portion, a second, from one end to the other end. The inner side surface portion is bent in order, and one end thereof is located on the first inner side surface portion, the other end is located on the second inner side surface portion, and overlaps with the corner top portion, the first inner side surface portion, and the second inner side surface portion.

In this corner protective material, the two inner side surface portions and the two outer side surface portions have a hollow space formed by combining two triangles in a plan view of the packaged object, and this surrounds the corner part of the packaged object. become. In this corner protective material, the two inner side surfaces are in surface contact with the object to be packed, and the two outer side surface portions extend straight from the first and second corner ends toward the corner outer peripheral side top, and One end of the cardboard material is positioned on the first inner side surface, the other end of the cardboard material is positioned on the second inner side surface, and the corner top, the first inner side surface, and the second inner side surface contacting the corner of the package Overlapping . For this reason, in this corner protective material, although it has a shape having a hollow space, deformation is suppressed with respect to the load from the side of the object to be packed, and it is difficult for the mold to be deformed.

Thereby, in this corner protective material, the deformation | transformation with respect to the load from the side of a to-be-packaged item can be suppressed, reducing the usage-amount of a corrugated-cardboard raw material compared with the case where a corrugated-cardboard raw material is laminated | stacked and formed. In addition, the corner portion of the packaged item can be protected better.

The corrugated cardboard corner protective material according to the second aspect protects each corner portion in a plan view of the packed object in a packing device for packing the packed object having a substantially rectangular parallelepiped shape. It is covered from the outer peripheral side together with the article to be packed by the exterior material that covers. In the corner protective material, the first and second inner side surface portions and the first and second outer side surface portions are formed by bending one cardboard material. The first inner side surface is in surface contact so as to sandwich the corner portion from the outer peripheral side of the packaged object in a plan view of the packaged object, and from the corner top corresponding to the apex of the corner part to the outer peripheral surface of the packaged object. It is a surface part extended toward the 1st corner edge part located in the side far from a corner top part along. The second inner side surface is in surface contact so that the corner portion is sandwiched from the outer peripheral side of the packaged item in plan view of the packaged item, and from the corner top corresponding to the apex of the corner unit to the outer circumferential surface of the packaged item. It is a surface part extended toward the 2nd corner edge part located in the far side of the direction orthogonal to a 1st inner surface part from a corner top part along. The first and second outer surface portions are located on the outer peripheral side from the first and second corner ends toward the outer peripheral side of the corner and in contact with the exterior material in the plan view of the package object. It is a surface part that extends straight. Here, the first inner side surface portion, the second inner side surface portion, the first outer side surface portion, and the second outer side surface portion form a hollow space in which two triangles are combined in a plan view of the packaged object. And in plan view of the article to be packed, the corrugated cardboard material is bent from one end to the other end in the order of the first outer surface portion, the first inner surface portion, the second inner surface portion, the second outer surface portion, and the first outer surface portion. One end of the first outer surface portion is positioned on the first outer surface portion, the other end is positioned near the first corner end portion of the first outer surface portion, and the first outer surface portion overlaps.

In this corner protective material, the two inner side surface portions and the two outer side surface portions have a hollow space formed by combining two triangles in a plan view of the packaged object, and this surrounds the corner part of the packaged object. become. In this corner protective material, the two inner side surfaces are in surface contact with the object to be packed, and the two outer side surface portions extend straight from the first and second corner ends toward the corner outer peripheral side top, and The both ends of the cardboard material overlap at the first outer surface portion . For this reason, in this corner protective material, although it has a shape having a hollow space, deformation is suppressed with respect to the load from the side of the object to be packed, and it is difficult for the mold to be deformed.

Thereby, in this corner protective material, the deformation | transformation with respect to the load from the side of a to-be-packaged item can be suppressed, reducing the usage-amount of a corrugated-cardboard raw material compared with the case where a corrugated-cardboard raw material is laminated | stacked and formed. Moreover, with this corner protection material, the number of bent portions of the cardboard material can be reduced, and the work of forming the corner protection material can be saved.

The corner protective material according to the third aspect is the corner protective material according to the first aspect , wherein the corrugated cardboard material is formed with a locking claw at an overlapping portion in the first inner side surface portion or the second inner side surface portion.

  In this corner protective material, since the locking claw is formed, the deformation with respect to the load from the side of the packaged item can be further suppressed.

  As described above, according to the present invention, the following effects can be obtained.

In the corner protective material according to the first aspect, it is possible to suppress deformation with respect to the load from the side of the object to be packed while reducing the amount of the corrugated cardboard material used as compared with the case where the corrugated cardboard material is laminated and formed. In addition, the corner portion of the packaged item can be protected better.

In the corner protective material according to the second aspect , it is possible to suppress the deformation with respect to the load from the side of the object to be packed while reducing the amount of the corrugated cardboard material used, compared to the case where the corrugated cardboard material is laminated and formed. In addition, the work of forming the corner protective material can be saved.

In the corner protective material according to the third aspect, the deformation with respect to the load from the side of the packaged object can be further suppressed.

It is a perspective view which shows one Embodiment of the packaging apparatus by which the corner protective material concerning this invention was employ | adopted. It is an expansion perspective view of a corner protective material. It is a plane sectional view of a corner protection material. It is an expanded view of a corner protective material. It is a plane sectional view of a corner protective material according to Modification 1. It is an expanded view of the corner protective material concerning the modification 1. It is a plane sectional view of the corner protection material concerning modification 2. It is an expanded view of the corner protective material concerning the modification 2. It is a plane sectional view of the corner protection material concerning modification 2. It is an expanded view of the corner protective material concerning the modification 2. It is a plane sectional view of the conventional corner protection material.

  Hereinafter, an embodiment of a packaging device in which a corner protective material according to the present invention is employed will be described based on the drawings.

<Overall configuration of packing device>
FIG. 1 is a perspective view showing a packaging device 10 in which a corner protective material 12 according to the present invention is adopted. FIG. 2 is an enlarged perspective view of the corner protection member 12. In the following description, the state in which the article 1 is packed in the packing device 10 is used as a reference, and the vertical direction of the article 1 in this state is referred to as “plan view”. The left-right direction is referred to as “side view”.

  The product 1 as an object to be packed is a mechanical product such as an air conditioner. In the present embodiment, the article to be packed 1 has a substantially rectangular parallelepiped shape.

  The packing device 10 is a packing device that packs an object 1 having a substantially rectangular parallelepiped shape. The packaging device 10 mainly includes a pallet 11, a corner protection material 12, and an exterior material 13.

  The pallet 11 constitutes a lower part of the packing device 10 and is a member on which the packaged object 1 is placed. Here, the pallet 11 is configured by fixing wooden plate materials to each other with nails, screws, or the like.

  The corner protection member 12 is a member that protects the corner portions 1a, 1b, 1c, and 1d in the plan view of the article 1 to be packed. Here, the corner protection member 12 is a bar-shaped member made of corrugated cardboard, and is mounted so as to cover each corner portion 1a, 1b, 1c, 1d of the article 1 to be packed from the outer peripheral side. And the corner protection material 12 is covered from the outer peripheral side with the to-be-packaged object 1 by the exterior material 13 which covers the side surface of the to-be-packaged object 1. The detailed configuration of the corner protection member 12 will be described later.

  The exterior material 13 is a member that covers the side surface of the packaged object 1 together with the corner protection material 12 from the outer peripheral side. Here, the exterior material 13 is a box-shaped member made of corrugated cardboard having an open bottom surface, and mainly includes a top surface portion 13a and a side surface portion 13b. The top surface portion 13a is a substantially square or substantially rectangular portion with which the top of the article 1 is in contact directly or via a cushioning material or the like. The side surface portion 13b is a rectangular tube-shaped portion extending downward from the periphery of the top surface portion 13a, and the side surface of the object 1 to be packed with the corner portions 1a, 1b, 1c, and 1d covered with the corner protective material 12. (See arrow X in FIG. 1). The packaging material 13 is formed by bending a corrugated cardboard material cut into a predetermined shape.

<Composition of corner protection material>
Next, the configuration of the corner protection member 12 will be described with reference to FIGS. Here, FIG. 3 is a cross-sectional plan view of the corner protecting member 12. FIG. 4 is a development view of the corner protection member 12.

  The corner protecting member 12 is formed by bending the corrugated board material P with the first and second inner side surface portions 21 and 22 and the first and second outer side surface portions 23 and 24.

  The first and second inner side surface portions 21 and 22 are surface portions that are in surface contact so as to sandwich the corner portions 1 a, 1 b, 1 c, and 1 d from the outer peripheral side of the packaged object 1 in a plan view of the packaged object 1. The first inner side surface portion 21 is a first corner end portion B located on the far side from the corner top portion A along the outer peripheral surface of the article 1 to be packed from the corner top portion A corresponding to the apexes of the corner portions 1a, 1b, 1c, 1d. It extends toward. The second inner side surface portion 22 extends from the corner top portion A to the second corner end portion D located on the far side from the corner top portion A along the outer peripheral surface of the article 1 to be packed. That is, the second inner side surface portion 22 extends from the corner top portion A in a direction perpendicular to the first inner side surface portion 21.

  The first outer side surface portion 23 faces the corner outer peripheral side top portion C, which is a point located on the outer peripheral side from the corner top portion A and in contact with the exterior material 13 from the first corner end portion B in the plan view of the article 1 to be packed. It is a surface part that extends straight. The second outer surface portion 24 is a surface portion that extends straight from the second corner end portion D toward the corner outer peripheral side top portion C in the plan view of the article 1 to be packed. That is, each of the first and second outer surface portions 23 and 24 is in contact with the article 1 to be packaged 1 from the corner outer peripheral side top portion C that is distant from the article 1 to the outer circumference side in the plan view of the article 1 to be packaged. Or it extends without bending toward the second corner end portions B and D. The two inner side surfaces 21 and 22 and the two outer side surfaces 23 and 24 form a hollow space S having a shape in which two triangles are combined in a plan view of the article 1 to be packed.

  And in the planar view of the to-be-packaged object 1, both ends E and F of the corrugated board raw material P are bent so that it may overlap in any of the some surface parts 21, 22, 23, and 24. FIG. Here, one end E of the corrugated cardboard material P is located on the first inner side surface portion 21, the other end F is located on the second inner side surface portion 22, and the corner top A, the first inner side surface portion 21 and the second inner side surface portion 22 overlapping. More specifically, the plurality of surface portions 21, 22, 23, and 24 are formed by bending a cardboard material P having a width L (see FIG. 4B) at the positions of the end portions A, B, C, and D. It is comprised by the surface parts 31, 32, 33, 34, 35, and 36 to be formed. The surface portion 36 and the surface portion 32 corresponding to one end E of the corrugated cardboard material P overlap with each other at the first inner side surface portion 21. Further, the surface portion 31 and the surface portion 35 corresponding to the other end F of the corrugated cardboard material P overlap with each other at the second inner side surface portion 22. The other surface portions 33 and 34 constitute first and second outer surface portions 23 and 24, respectively.

  Further, the corrugated cardboard material P has a wave in a direction perpendicular to the fold lines (the mountain fold line and the valley fold line in FIG. 4B) of the top and end portions A, B, C, and D of the corner protective material 12. Molded to appear (see FIG. 4 (a)).

<Characteristics of corner protective material>
The corner protective material 12 having the above-described configuration has the following characteristics.

  As described above, the corner protection member 12 has the hollow space S having a shape in which two triangles are combined in the plan view of the packaged object 1 by the two inner side surfaces 21 and 22 and the two outer side surfaces 23 and 24. This encloses the corner portions 1a, 1b, 1c, and 1d of the article 1 to be packed. And in the corner protection material 12, two inner side surface parts 21 and 22 surface-contact with the to-be-packaged object 1, and two outer side surface parts 23 and 24 are the corner outer peripheral side from the 1st and 2nd corner edge parts B and D. It extends straight toward the top C. In addition, both ends E and F of the cardboard material P overlap at the first and second inner side surface portions 21 and 22.

  For this reason, in the corner protection material 12, although it is the shape which has the hollow space S, a deformation | transformation is suppressed with respect to the load from the to-be-packaged goods 1 side, and it is hard to produce a shape | mold loss. Specifically, when a load G acts on the corner outer peripheral side top C from the side of the article to be packed 1 (see FIG. 3), the load G is a load G1 directed upward in FIG. 3 and a load G2 toward the right side of the drawing. When the load G1 acts on the corner protection member 12, the load G1 is received by the first outer side surface portion 23 and the second inner side surface portion 22. At this time, since the second inner side surface portion 22 is in surface contact with the article 1 to be packed, the position of the second inner side surface portion 22 does not move. For this reason, the position of the 1st inner surface part 21 connected to the 2nd inner surface part 22 via the corner top part A, ie, the position of the 1st corner edge part B, does not move. Then, since the first outer surface portion 23 extends straight from the first corner end portion B toward the corner outer peripheral side top portion C, it does not move even when the load G1 is applied. That is, the corner outer peripheral side top portion C does not move in the load G1 direction. Further, when a load G <b> 2 is applied to the corner protection member 12, the load G <b> 2 is received by the second outer side surface portion 24 and the first inner side surface portion 21. At this time, since the first inner side surface portion 21 is in surface contact with the article 1 to be packed, the position of the first inner side surface portion 21 does not move. For this reason, the position of the second inner side surface portion 22 connected to the first inner side surface portion 21 via the corner top A, that is, the position of the second corner end portion D does not move. Then, since the second outer side surface portion 24 extends straight from the second corner end portion D toward the corner outer peripheral side top portion C, it does not move even when the load G2 is applied. That is, the corner outer peripheral side top portion C does not move in the load G2 direction. Therefore, the position of the corner outer peripheral side top portion C does not move even when the load G is applied, so that the deformation of the corner protective material 12 is suppressed even when the load is applied from the side of the packaged object 1, and the shape is lost. Is less likely to occur.

  Thereby, in the corner protection material 12, compared with the case where the corrugated cardboard material P is formed by stacking (see FIG. 11), the amount of use of the corrugated cardboard material P is reduced and the load from the side of the packaged object 1 is reduced. Deformation can be suppressed.

  Moreover, in the corner protective material 12, as described above, the corner top portion A, the first inner side surface portion 21 and the second end portions E and F of the corrugated cardboard material P are in contact with the corner portions 1a, 1b, 1c and 1d of the article 1 to be packed. Since the two inner side surface portions 22 are overlapped, the corner portions 1a, 1b, 1c, and 1d of the article to be packed 1 can be better protected.

  Further, as described above, the corrugated board material P constituting the corner protective material 12 has a wave-like appearance in a direction perpendicular to the folding lines of the tops and ends A, B, C, and D of the corner protective material 12. It has been molded.

  For this reason, the strength with respect to the load from the side of the article to be packed 1 of the corner protective material 12 is increased, and the deformation of the corner protective material 12 is further suppressed.

<Configuration and Characteristics of Corner Protecting Material of Modification 1>
In the corner protection material 12 (see FIGS. 3 and 4), both ends E and F of the cardboard material P are overlapped at the corner top A, the first inner side surface part 21 and the second inner side surface part 22, but the cardboard material The portion where the ends E and F of P are overlapped is not limited to this.

For example, as shown in FIGS. 5 and 6, one end E of the cardboard material P is located on the first outer surface portion 23 and the other end F is the first corner end of the first outer surface portion 23 in the plan view of the article 1 to be packed. It may be located near the part B and overlap with the first outer surface part 23. More specifically, the plurality of surface portions 21, 22, 23, and 24 bend the cardboard material P ′ having the width L ′ (see FIG. 6B) at the positions of the end portions A, B, C, and D. It is comprised by the surface parts 131, 132, 133, 134, 135 formed by this. The surface portion 135 and the surface portion 131 corresponding to the one end E of the cardboard material P ′ are overlapped with each other at the first outer surface portion 23. Further, the surface portion 131 corresponding to the other end F of the cardboard material P ′ is located in the vicinity of the first corner end portion B of the first outer surface portion 23 . The other surface portions 132, 133, and 134 constitute the second outer surface portion 24, the second inner surface portion 22, and the first inner surface portion 21, respectively.

  And also in the corner protective material 12 of this modification, although it is the shape which has the hollow space S similarly to said corner protective material 12 (refer FIG. 3, 4), the to-be-packaged goods 1 side Deformation is suppressed with respect to the load from the side, and it is difficult for deformation to occur.

  Moreover, in the corner protection material 12 of this modification, compared with the case where the corrugated cardboard material P is formed by stacking (see FIG. 11), the amount of the corrugated cardboard material P is reduced, and from the side of the article to be packed 1. The deformation with respect to the load can be suppressed. Specifically, in the corner protective material 12 (see FIGS. 3 and 4), the corrugated board material P is bent at five places. However, in the corner protective material 12 of this modification, the corrugated board material P ′ is bent. There are four places. Thereby, the work which forms the corner protective material 12 can be labor-saving.

  Further, in the corner protective material 12 of this modification, the width L ′ of the corrugated board material P ′ is also made smaller than the width L of the corrugated cardboard material P of the corner protecting material 12 due to fewer bent portions. Can do. Thereby, the usage-amount of a corrugated cardboard material can be reduced further.

<Configuration and Characteristics of Corner Protecting Material of Modification 2>
In the above corner protection member 12 (see FIGS. 3 and 4), the first inner side surface portion 21 or the second inner side surface portion 22 can be further suppressed from being deformed with respect to the load from the side of the packaged object 1. You may make it form a latching claw in the overlap part.

  For example, as shown in FIGS. 7 and 8, in the corrugated cardboard material P constituting the corner protective material 12, the locking claws 25 may be formed in the overlapping portion of the first inner side surface portion 21. Here, a locking hole 26 is formed in the surface portion 31 constituting the second inner side surface portion 22, a locking claw 25 is formed in the surface portion 36 constituting the first inner side surface portion 21, and the locking claw 25 is inserted into the locking hole. 26 is inserted. Further, as shown in FIGS. 7 and 8, a locking claw 27 may be formed on the surface portion 33 constituting the first outer surface portion 23 and inserted into the locking hole 26.

  Further, as shown in FIGS. 9 and 10, in the corrugated cardboard material P constituting the corner protecting member 12, a locking claw 28 may be formed at an overlapping portion in the second inner side surface portion 22. Here, a locking hole 29 is formed in the surface portion 31 constituting the second inner side surface portion 22, a locking claw 28 is formed in the surface portion 35 constituting the second inner side surface portion 22, and the locking claw 28 is inserted into the locking hole. 29 is inserted.

  In the corner protective material 12 of this modification, such locking claws 25, 27, and 28 are formed, so that deformation against a load from the side of the article to be packed 1 can be further suppressed.

  8 and 10, only one locking claw 25, 27, 28 is provided in the longitudinal direction of the corner protective material 12 (the vertical direction of the packaged material 1). Good.

<Other embodiments>
As mentioned above, although embodiment and modification of this invention were described based on drawing, specific structure is not restricted to this embodiment and modification, It can change in the range which does not deviate from the summary of invention. .

  For example, in the above-described embodiment and modification, a cardboard box-shaped member having an open lower surface is used as the exterior material 13, but the present invention is not limited to this. For example, another member may be used as the exterior material, such as wrapping a stretch film so as to cover the side surface of the article 1 with the corner protective material 12 from the outer peripheral side.

  Moreover, in the modification 2, although the latching claws 25, 27, and 28 are formed in the overlap part in the 1st inner surface part 21 or the 2nd inner surface part 22 of the corner protective material 12 of the said embodiment, it is limited to this. Is not to be done. For example, a locking claw may be formed on the first outer surface portion 23 in the corner protecting member 12 of the first modification.

  The present invention provides a corrugated cardboard corner protective material that protects each corner portion in a plan view of a substantially rectangular parallelepiped packaged object and is covered from the outer peripheral side together with the packaged object by an exterior material that covers the side surface of the packaged object. On the other hand, it is widely applicable.

DESCRIPTION OF SYMBOLS 1 To-be-packaged object 1a-1d Corner part 10 Packing apparatus 12 Corner protective material 13 Exterior material 21,22 1st and 2nd inner side surface part 23,24 1st and 2nd outer side surface part 25,28 Locking claw A Corner top part B, D 1st and 2nd corner end C Corner outer peripheral side top E, F Both ends of corrugated cardboard material P, P 'Corrugated cardboard material

JP-A-8-25530

Claims (3)

In the packing device (10) for packing the packaged object (1) having a substantially rectangular parallelepiped shape, each corner portion (1a to 1d) in the plan view of the packaged object is protected, and the side surface of the packaged object is A corrugated cardboard corner protective material covered from the outer peripheral side together with the article to be packed by the covering material (13) for covering,
In the plan view of the packaged object, the corner part is in surface contact so as to be sandwiched from the outer peripheral side of the packaged object, and the outer periphery of the packaged object from the corner top (A) corresponding to the apex of the corner part A first inner side surface (21) extending toward the first corner end (B) located on the side far from the corner top along the surface;
In the plan view of the packaged object, the corner part is in surface contact so as to be sandwiched from the outer peripheral side of the packaged object, and the outer periphery of the packaged object from the corner top (A) corresponding to the apex of the corner part A second inner side surface portion (22) extending from the top of the corner along the surface to a second corner end portion (D) located on the far side in a direction orthogonal to the first inner side surface portion ;
In a plan view of the article to be packed, straight from the first and second corner ends toward the corner outer peripheral side top (C) which is located on the outer peripheral side of the corner top and is in contact with the exterior material. First and second outer surface portions (23, 24) extending to
Is formed by bending one cardboard material ( P ),
The first inner side surface portion, the second inner side surface portion, the first outer side surface portion, and the second outer side surface portion form a hollow space (S) having a shape in which two triangles are combined in a plan view of the packaged object. And
In plan view of the article to be packed, the corrugated cardboard material has the first inner side surface portion, the second inner side surface portion, the second outer side surface portion, and the first outer surface portion from one end (E) to the other end (F). The outer side surface portion, the first inner side surface portion, and the second inner side surface portion are bent in this order, the one end is located on the first inner side surface portion, the other end is located on the second inner side surface portion, the corner top portion, Overlapping the first inner surface and the second inner surface,
Corner protection material (12). In the packing device (10) for packing the packaged object (1) having a substantially rectangular parallelepiped shape, each corner portion (1a to 1d) in the plan view of the packaged object is protected, and the side surface of the packaged object is A corrugated cardboard corner protective material covered from the outer peripheral side together with the article to be packed by the covering material (13) for covering,
In the plan view of the packaged object, the corner part is in surface contact so as to be sandwiched from the outer peripheral side of the packaged object, and the outer periphery of the packaged object from the corner top (A) corresponding to the apex of the corner part A first inner side surface (21) extending toward the first corner end (B) located on the side far from the corner top along the surface;
In the plan view of the packaged object, the corner part is in surface contact so as to be sandwiched from the outer peripheral side of the packaged object, and the outer periphery of the packaged object from the corner top (A) corresponding to the apex of the corner part A second inner side surface portion (22) extending toward the second corner end portion (D) located on the far side in the direction orthogonal to the first inner side surface portion from the corner top portion along the surface;
In a plan view of the article to be packed, straight from the first and second corner ends toward the corner outer peripheral side top (C) which is located on the outer peripheral side of the corner top and is in contact with the exterior material. First and second outer surface portions (23, 24) extending to
Is formed by bending one cardboard material ( P ′ ),
The first inner side surface portion, the second inner side surface portion, the first outer side surface portion, and the second outer side surface portion form a hollow space (S) having a shape in which two triangles are combined in a plan view of the packaged object. And
In plan view of the article to be packed, the corrugated cardboard material has the first outer surface portion, the first inner surface portion, the second inner surface portion, and the second surface from one end (E) to the other end (F). The outer side surface portion is bent in the order of the first outer surface portion, the one end is positioned on the first outer surface portion, the other end is positioned near the first corner end portion of the first outer surface portion, and the first 1 It overlaps with the outer surface part,
Corner protection material (12). The corrugated cardboard material (P) has locking claws (25, 28) formed at overlapping portions of the first inner side surface portion (21) or the second inner side surface portion (22).
The corner protective material (12) according to claim 1 .

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