JP5388501B2 - Packing material - Google Patents

Description

  The present invention relates to a packing member used for packing an article.

  When packing an article, a cushioning pad is sometimes attached to protect the corner of the article. As such a corner pad, there is a case where a piece of corrugated cardboard or the like assembled into a three-dimensional shape having corners composed of at least three walls by bending is sometimes used.

  Conventionally, such square contact is a problem in that it is bulky and inefficient in storage and transportation because it is in an assembled state in which flat corrugated cardboard is assembled by pre-adhering the parts where the corrugated cardboard overlaps. It was.

Therefore, although the thing of patent document 1 is proposed as a square contact which does not use an adhesive agent, since this square contact has the weak fitting between the members for fixing each member, it is an assembly state. There was a problem with the ability to maintain. In addition, since this corner rest has only at least two corners (at least four walls) composed of three walls in the assembled state, it is used as a corner rest for large articles (articles with long sides). Could not be used.
JP-A-11-59721

  Therefore, the assembled state has at least one corner constituted by three walls, and the assembled state can be maintained without performing bonding or the like from the expanded state. It aims at providing the member for packing with high efficiency.

In order to achieve the above object, the packaging member of the present invention is composed of three walls by bending a sheet material including a plurality of walls and having a thickness of 1.5 mm or more from a flat plate-like developed state. In the packaging member having at least one corner to be assembled, one wall constituting the corner is a locking double wall composed of an inner layer and an outer layer, and the inner layers are in contact with each other by the small facets. Accordingly, the first inner locking piece and the second inner locking piece that lock each other in the direction along the locking double wall are configured, and the outer layer is formed by the first inner locking piece and the second inner locking piece. By being integrated with each part of the outer wall surface of the second inner locking piece, the inner side surface abuts on the other part of the outer wall surface of the second inner locking piece and the first inner locking piece, The second inner locking piece and the first inner engagement in a direction crossing the locking double wall Constituted by a first outer locking piece and a second outer locking pieces for locking the deployment of the piece, the following as an embodiment of the further locking double wall (1), the contents of (2) or (3) It is characterized by having prepared .

(1) The first inner locking piece and the second inner locking piece form a triangle that bisects the rectangular inner layer by a diagonal line, and the first outer locking piece and the second outer locking piece form the rectangular outer layer as the inner layer. The aspect which makes the triangle which bisected by the diagonal which intersects with the diagonal.
The first inner locking piece and the second inner locking piece may further have a convex portion and a concave portion that fit together .
(2) The first inner locking piece and the second inner locking piece form a quadrangle obtained by dividing the inner layer of the quadrangle by a line segment connecting the midpoints of the opposite sides, and the protrusions and recesses that are fitted to each other are relatively And the first outer locking piece and the second outer locking piece form a quadrangle in which the outer layer of the quadrangle is divided into two by the line segment intersecting with the line segment of the inner layer.
(3) The first inner locking piece and the second inner locking piece form a triangle and a quadrangle that bisects the inner layer of the triangle by a line segment connecting the midpoints of two sides extending from the corner. A mode in which the piece and the second outer locking piece form a triangle or a quadrangle that bisects the outer layer of the triangle by a line segment that intersects the line segment of the inner layer.

Moreover, it is preferable that the inner wall surface of the inner layer is flush with no step except for the contact portion between the small edge surfaces of the first inner locking piece and the second inner locking piece.
Further, the small outer surfaces of the first outer locking piece and the second outer locking piece can come into contact with each other, and the outer surface of the outer layer is the small edge of the first outer locking piece and the second outer locking piece. It is preferable that the surfaces are flush with each other, except for the contact points between the surfaces.

The sheet material used in the present invention is not particularly limited, and examples thereof include corrugated cardboard, plastic corrugated cardboard (pradan), and cardboard.
Further, when the thickness of the sheet material is less than 1.5 mm, the area where the small facets come into contact with each other becomes small, and the force for locking the development becomes weak. On the other hand, if the thickness is too thick, the packaging member itself becomes heavy and difficult to process, and therefore, the thickness is preferably 1.5 to 6 mm.

  Further, the other part of the outer wall surface of the second inner locking piece and the first inner locking piece is bonded to the inner side surface of the first outer locking piece and the second outer locking piece. First, when the outer layer is pressed inward to remove contact between the small inner surfaces of the first inner locking piece and the second inner locking piece, the sheet material can be returned to a flat plate-like unfolded state. Preferably it is.

  Although it does not specifically limit as an aspect of the member for packing, The corner | angular_contact which protects a corner | angular part and is applied to the corner | angular part which consists of at least 3 surfaces of an article | item, the box which accommodates an article | item inside, etc. can be illustrated.

Although it does not specifically limit as an aspect of a corner contact, The aspect which has one corner comprised from three walls, the aspect which has two corners comprised from three walls, etc. can be illustrated.
Although it does not specifically limit as an aspect of a box, The aspect which has four corners which comprise three walls, the aspect which has eight corners which comprise three walls, etc. can be illustrated.
In addition, when the square pad or the box has a plurality of corners constituted by three walls, an aspect in which there is one locking double wall and an aspect in which there are two opposing walls can be exemplified.

  According to the present invention, it becomes an assembled state having at least one corner constituted by three walls, and the assembled state can be maintained without performing adhesion or the like from the expanded state. It is possible to provide a packaging member that is efficient in storage and transportation.

In a packing member that includes a plurality of walls and has a thickness of 1.5 mm or more, and is folded from a flat plate-shaped development state into an assembly state having at least one corner constituted by three walls.
One wall that constitutes a corner is a locking double wall composed of an inner layer and an outer layer,
A rectangular inner layer is formed into a triangle that is bisected by a diagonal line, and the first inner locking pieces and the second locking holes that lock each other in the direction along the locking double wall by abutting the small facets with each other. Consists of inner locking pieces,
A quadrangular outer layer is formed into a triangle that is bisected by a diagonal line that intersects with the diagonal line of the inner layer, and is integrated with a part of the outer wall surface of each of the first inner locking piece and the second inner locking piece. The inner side surface abuts on the other part of the outer wall surface of the piece and the first inner locking piece, thereby expanding the second inner locking piece and the first inner locking piece in the direction crossing the locking double wall. It consists of a first outer locking piece and a second outer locking piece to be locked,
The inner wall surface of the inner layer is flush with no step except for the contact points between the small inner surfaces of the first inner locking piece and the second inner locking piece,
The small edge surfaces of the first outer locking piece and the second outer locking piece can come into contact with each other, and the outer surface of the outer layer is between the small edge surfaces of the first outer locking piece and the second outer locking piece. A packaging member characterized by being flush with no level difference except for the abutting portion.

  As shown in FIG. 1 to FIG. 3 and FIG. 13, the packaging member of the present embodiment is made of corrugated cardboard having a thickness of 2.5 mm, three substantially square walls 11, 15, 20 that are substantially orthogonal to each other, It is a square pad 10 having a corner 12 constituted by three walls 11, 15, 20. As shown in FIG. 13, the corner pad 10 is applied from the outside to the corner portion formed of the three surfaces of the article 90 to protect the corner portion.

  As shown in FIGS. 1 to 3, one of the three walls 11, 15, and 20 is a locking double wall 20, and the locking double wall 20 includes the other two walls 11, 15 is formed of a substantially square outer layer 26 continuously provided at 15 and a substantially square inner layer 21 provided in contact with the outer layer 26. The other two walls 11 and 15 are connected to each other via a fold line 14.

  The outer layer 26 is composed of two substantially right isosceles triangular first outer locking pieces 27 and second outer locking pieces 28 having both outer diagonal lines 29 extending from the corner 12 as hypotenuses. The first outer locking piece 27 is connected to the first wall 11 of one of the other two walls 11, 15 via the fold line 13, and the second outer locking piece 28 is connected to the other second wall 15. Are connected to each other through a crease 16. Further, the first outer fore edge surface 27a of the first outer locking piece 27 corresponding to the side that forms the outer diagonal line 29 and the second outer fore edge surface 28a of the second outer locking piece 28 are in contact with each other. Further, the outer surface of the outer layer 26 composed of the outer surface 27 b of the first outer locking piece 27 and the outer surface 28 b of the second outer locking piece 28 is flush.

The inner layer 21 includes a first inner locking piece 22 having two substantially right-angled isosceles triangles and an inner diagonal line 24 perpendicular to the outer diagonal line 29 in plan view in the orthogonal direction of the locking double wall 20. And 2 inner locking pieces 23. The first inner fore edge surface 22a of the first inner locking piece 22 corresponding to the side that forms the inner diagonal line 24 and the second inner fore edge surface 23a of the second inner locking piece 23 are in contact with each other. Further, the inner wall surface of the inner layer 21 composed of the first inner wall surface 22c of the first inner locking piece 22 and the second inner wall surface 23c of the second inner locking piece 23 is flush.
The first inner locking piece 22 is bonded to and integrated with the first outer locking piece 27 at a portion 22e where the first outer wall surface 22b contacts the first inner side surface 27c of the first outer locking piece 27. The first inner locking piece 22 is not bonded to the first outer locking piece 27 (for example, the first inner locking piece 22 and the first outer locking piece by bending one sheet material). 27) may be integrated.
The second inner locking piece 23 is bonded to and integrated with the second outer locking piece 28 at a portion 23e where the second outer wall surface 23b contacts the second inner side surface 28c of the second outer locking piece 28. Note that the second inner locking piece 23 is not bonded to the second outer locking piece 28 (for example, the second inner locking piece 23 and the second outer locking piece by bending one sheet material). 28), and may be integrated.

A method of assembling the present embodiment from the flat developed state to the assembled state will be described with reference to FIG.
First, as shown in FIG. 3a, the first wall 11 and the second wall 15 that are connected to each other, and the first outer locking piece 27 that is connected to the first wall 11 and to which the first inner locking piece 22 is attached. From the unfolded state where the second outer locking piece 28 connected to the second wall 15 and the second inner locking piece 23 is attached in a flat plate shape, as shown in FIG. The outer locking piece 27 is from the fold 13 between the first wall 11 and the second outer locking piece 28 is from the fold 16 with the second wall 15 to the first inner locking piece 22 or the second inner locking piece 23. Are bent at substantially right angles to the surface side (in the direction of the arrow in FIG. 3a) to which each is attached.
Next, as shown in FIG. 3c, the first wall 11 is bent in the direction of the arrow from the fold line 14 so that the first outer wall surface 22b and the second inner wall surface 23c are in sliding contact with each other.
Then, as shown in FIG. 3d, the three walls 11, 15, 20 including the locking double wall 20 are made to be substantially orthogonal to each other.

On the contrary, in order to change from the assembled state to the flattened state, first, the outer layer 26 is pressed inward to remove the contact between the first inner fore edge surface 22a and the second inner fore edge surface 23a.
Next, the 1st wall 11 and the 2nd wall 15 are made substantially horizontal, making the 1st outer wall surface 22b and the 2nd inner wall surface 23c slidably contact.
Then, the first outer locking piece 27 and the second outer locking piece 28 are made to be substantially horizontal with the second wall 15.

The operation of the present embodiment will be described.
When the first inner fore edge surface 22a and the second inner fore edge surface 23a come into contact with each other, the first inner locking piece 22 and the second inner locking piece 23 in the direction along the locking double wall 20 are mutually connected. The deployment of is locked.
The expansion of the first wall 11 and the second wall 15 is locked by the mutual expansion of the first inner locking piece 22 and the second inner locking piece 23 being locked.
The other inner portion 22d of the first outer wall surface 22b that does not contact the first inner surface 27c abuts on the second inner surface 28c, whereby the first inner locking piece 22 in the direction intersecting the locking double wall 20 is obtained. The deployment of is locked.
The development of the first outer locking piece 27 and the first wall 11 is locked by locking the development of the first inner locking piece 22 in the direction intersecting the locking double wall 20.
The second inner locking piece 23 in the direction intersecting the locking double wall 20 is formed by the other portion 23d of the second outer wall surface 23b not contacting the second inner side surface 28c coming into contact with the first inner side surface 27c. The deployment of is locked.
The development of the second inner locking piece 28 and the second wall 15 is locked by locking the development of the second inner locking piece 23 in the direction intersecting the locking double wall 20.

According to the present embodiment, the following effects (a) to (c) can be obtained.
(A) When the respective locking pieces 22, 23, 27, 28 come into contact with each other, the development of the inner locking pieces 22, 23 is locked, and the first outer locking piece 27, the second outer locking piece 28, and The development of the two walls 11 and 15 is locked, and the assembled state can be maintained without performing bonding or the like at the time of assembly.
(B) Since no bonding or the like is performed at the time of assembly, it is not necessary to perform assembly in advance (it is not necessary), storage and transportation can be performed in a flattened state, and storage and transportation efficiency is good.
(C) Since adhesion or the like is not performed at the time of assembly, it can be returned to a flat plate-like developed state.

As shown in FIG. 4, the packing member of this example is a square pad 35, which is substantially the same as the packing member of Example 1.
However, the direction in which the first inner locking piece 22 and the second inner locking piece 23 are respectively bonded to the first outer locking piece 27 or the second outer locking piece 28 (the direction of the oblique side) and the fitting are mutually fitted. The convex portion 18 and the concave portion 19 to be joined together are that the convex portion 18 is relatively provided on the first inner locking piece 22 and the concave portion 19 is relatively provided on the second inner locking piece 23. It is different from the member for use.

  According to the present embodiment, the effects (a) to (c) obtained in the first embodiment can be obtained. In particular, with respect to the effect (a), the first inner locking piece 22 and the second inner locking are provided. Since the piece 23 is fitted by the convex part 18 and the concave part 19, it becomes more remarkable.

As shown in FIG. 5, the packing member of the present embodiment is a square pad 40 and is substantially the same as the packing member of the first embodiment.
However, the 1st inner side locking piece 22 and the 2nd inner side locking piece 23 become the substantially rectangular shape which divided the inner layer 21 into the inner line segment 25 which ties the substantially middle point of an opposite side, and the convex part 18 and the recessed part 19 which mutually fit, However, the first inner locking piece 22 is provided with a convex portion 18 and the second inner locking piece 23 is provided with a concave portion 19, and the first outer locking piece 27 and the second outer locking piece. The piece 28 has a substantially rectangular shape that is orthogonal to the extension line segment 25 and is divided into two by an outer line segment 30 that connects the substantially middle point of the opposite side in a plan view in the orthogonal direction of the locking double wall 20. However, this is different from the packaging member of Example 1.

  According to the present embodiment, the effects (a) to (c) obtained in the first embodiment can be obtained. In particular, with respect to the effect (a), the first inner locking piece 22 and the second inner locking are provided. Since the piece 23 is fitted by the convex part 18 and the concave part 19, it becomes more remarkable.

  As shown in FIGS. 6 and 13, the packing member of the present embodiment is made of corrugated cardboard having a thickness of 2.5 mm, and includes four substantially square walls 11, 15, and 20, and three of the four walls. A square pad 45 having two corners 12 constituted by two walls 11, 15, 20. As shown in FIG. 13, the corner pad 45 is applied from the outside to the four corners of the article 90 to protect the corners.

  As shown in FIG. 6, two opposing walls among the four walls 11, 15, 20 are locking double walls 20, and in the assembled state, the two locking double walls 20 face each other. It is symmetrical. Each locking double wall 20 has a substantially right-angled isosceles triangular first outer locking piece 27 and a second outer wall that bisect the outer layer 26 in the same manner as the locking double wall 20 of the packaging member of the first embodiment. The locking piece 28 includes a first inner locking piece 22 and a second inner locking piece 23 each having a substantially right isosceles triangular shape that bisects the inner layer 21. A first outer locking piece 27 is connected to the opposite side of the first wall 11, and a second outer locking piece 28 is connected to the opposite side of the second wall 15.

  According to the present embodiment, the effects (a) to (c) obtained in the first embodiment can be obtained, and in particular, since the two opposing walls are the locking double wall 20, the corner contact As a result, the strength can be improved.

  As shown in FIG. 7, the packaging member of the present embodiment is made of corrugated cardboard having a thickness of 1.5 mm, and includes two substantially square walls 11 and 15, two substantially isosceles triangular walls 20, It is a square pad 70 having two corners 12 constituted by three walls 11, 15, 20 of the two walls. Like the square pad 45, the square pad 70 is applied from the outside to the four corners of the article to protect the corner part.

  Of the four walls 11, 15, and 20, two opposing walls 20 having a substantially right isosceles triangle form a locking double wall 20. Each locking double wall 20 includes a substantially right isosceles triangle outer layer 26 connected to the other two substantially square walls 11 and 15, and a substantially right isosceles triangle provided in contact with the outer layer 26. Of the inner layer 21.

  The outer layer 26 includes a first outer locking piece 27 and a second outer locking piece 28 each having a substantially right isosceles triangle shape divided into two by an outer line segment 72 extending from the corner 12 to a substantially middle point of the oblique side 26g of the outer layer 26. ing.

The inner layer 21 connects the substantially midpoints of the two sides 21f that are orthogonal to the outer line segment 72 and extend from the apex angle of the inner layer 21 of a substantially right-angled isosceles triangle in a plan view of the locking double wall 20 in the orthogonal direction. The first inner locking piece 22 has a substantially isosceles trapezoidal shape and is divided into two by an extension 73, and the second inner locking piece 23 has a substantially right isosceles triangular shape.
One of the two first inner locking pieces 22 is connected to the first outer locking piece 27 via a fold 71 and is bent from the fold 71 so as to be integrated with each other. A locking piece 22 and a first outer locking piece 27 are formed.

  According to the present embodiment, the effects (a) to (c) obtained in the first embodiment can be obtained, and in particular, since the two opposing walls are the locking double wall 20, the corner contact As a result, the strength can be improved.

  As shown in FIG. 8, the packaging member of the present embodiment is made of corrugated cardboard having a thickness of 2.5 mm, and includes substantially square five walls 11, 15, 17, 20 and three of the five walls. It is a box 50 having four corners 12 constituted by walls and a lid piece 53 that closes the opening of the bottomed inner space 51 constituted by five walls 11, 15, 17, and 20.

  Of the five walls 11, 15, 17, and 20, two opposing walls are locking double walls 20, and the two locking double walls 20 are plane-symmetric with each other in the assembled state. . Each corner 12 is provided with a third wall 17 not provided with an outer locking piece and a first wall 11 or a second outer locking piece 28 provided with a first outer locking piece 27. The second wall 15 and one locking double wall 20 are formed. Each locking double wall 20 has a substantially right-angled isosceles triangular first outer locking piece 27 and a second outer wall that bisect the outer layer 26 in the same manner as the locking double wall 20 of the packaging member of the first embodiment. The locking piece 28 includes a first inner locking piece 22 and a second inner locking piece 23 each having a substantially right isosceles triangular shape that bisects the inner layer 21. In the assembled state, the first wall 11 and the second wall 15 are opposed to each other. The first wall 11 is provided with a first outer locking piece 27 on the opposite side, the third wall 17 is provided on one of the other sides, and a lid piece 53 can be bent on the other side. It is connected to. A second outer locking piece 28 is provided on the opposite side of the second wall 15, and a third wall 17 is provided on one of the other sides.

  According to the present embodiment, the effects (a) to (c) obtained in Embodiment 1 can be obtained, and in particular, a flat plate can be formed into a box shape.

The present invention is not limited to the above-described embodiments, and can be embodied by appropriately changing to the following modifications without departing from the spirit of the invention.
(1) As shown in FIG. 9, as a first modification, six substantially square walls 11, 15, 17, and 20 and eight corners 12 composed of three of the six walls are provided. It has 6 walls 11, 15, 17, 20, one set of two opposing walls is a locking double wall 20, surrounded by 6 walls 11, 15, 17, 20 A mode in which a box 55 having a closed space inside is provided.
(2) As shown in FIG. 10, as a second modification, four substantially square walls 11, 15, 17, and 20 and two corners 12 constituted by three of the four walls are provided. A mode in which one of the four walls among the four walls is a latching double wall 20 and is a square abutment 60.
(3) As shown in FIG. 11 and FIG. 13, as a third modification, there are three walls 11, 15, and 20 that are substantially right-angled isosceles triangles, and one corner 12 that is composed of these three walls. A mode in which one of the three walls is a square pad 75 in which one wall is a locking double wall 20.
(4) As shown in FIG. 12, as a fourth modification, two opposing substantially square walls 20, three substantially rectangular walls 11, 15, 17, one substantially square wall 20, and two approximately It has four corners 12 composed of rectangular walls, and two substantially square walls 20 are locking double walls 20 and are surrounded by five walls 11, 15, 17, 20. A mode in which a box 65 having a bottomed inner space 66 is formed.

It is a perspective view of the assembly state of Example 1 and an unfolded state. FIG. 3 is a front view and a back view of the unfolded state of Example 1. FIG. 3 is a perspective view of assembly work of Example 1. It is the perspective view of the assembly state of Example 2, and the surface view of an unfolded state. It is the perspective view of the assembly state of Example 3, and the surface view of an unfolded state. It is the perspective view of the assembly state of Example 4, and the surface view of an unfolded state. It is the perspective view of the assembly state of Example 5, and the surface view of an unfolded state. It is the perspective view of the assembly state of Example 6, and the surface view of an expansion | deployment state. It is the perspective view of the assembly state of the modification 1, and the surface view of an unfolded state. It is the perspective view of the assembly state of the modification 2, and the surface view of an unfolded state. It is the perspective view of the assembly state of the modification 3, and the surface view of an unfolded state. It is the perspective view of the assembly state of the modification 4, and the surface view of an expansion | deployment state. It is a perspective view of the use condition of a square pad.

Explanation of symbols

10 corner pad 11 first wall 12 corner 15 second wall 17 third wall 18 convex portion 19 concave portion 20 locking double wall 21 inner layer 22 first inner locking piece 22a first inner edge surface 22b first outer wall surface 22d and others Part 23 Second inner locking piece 23a Second inner edge surface 23b Second outer wall surface 23d Other part 24 Inner diagonal line 25 Inner line segment 26 Outer layer 27 First outer locking piece 27a First outer edge surface 27c First inner side face 28 First 2 Outer locking piece 28a Second outer facet 28c Second inner side 29 Outer diagonal 30 Outer line segment 35 Square pad 40 Square pad 45 Square pad 50 Box 70 Square pad 72 External line 73 Internal line 90 Article

Claims (8)

A sheet material including a plurality of walls (11, 15, 17, 20) and having a thickness of 1.5 mm or more is bent from a flattened state, and three walls (11, 15, 17, 20) are formed. In the packaging member (10) in an assembled state having at least one corner (12) composed of
One wall (20) constituting the corner (12) is a locking double wall (20) composed of an inner layer (21) and an outer layer (26),
The inner layer (21) is a first inner locking piece (latching each other in the direction along the locking double wall (20) by the small facets (22a, 23a) coming into contact with each other. 22) and the second inner locking piece (23),
The outer layer (26) is integrated with a part (22e, 23e) of the outer wall surface (22b, 23b) of the first inner locking piece (22) and the second inner locking piece (23), respectively. The inner side surfaces (27c, 28c) abut against the other portions (22d, 23d) of the outer wall surfaces (22b, 23b) of the second inner locking piece (23) and the first inner locking piece (22), respectively. Thus, the first outer locking piece (27) for locking the development of the second inner locking piece (23) and the first inner locking piece (22) in the direction crossing the locking double wall (20). ) And the second outer locking piece (28),
The first inner locking piece (22) and the second inner locking piece (23) form a triangle formed by dividing the square inner layer (21) by a diagonal line (24), and the first outer locking piece ( 27) and the second outer locking piece (28) form a triangle obtained by bisecting the rectangular outer layer (26) by a diagonal line (29) intersecting the diagonal line (24) of the inner layer (21). A packaging member. A sheet material including a plurality of walls (11, 15, 17, 20) and having a thickness of 1.5 mm or more is bent from a flattened state, and three walls (11, 15, 17, 20) are formed. In the packaging member (10) in an assembled state having at least one corner (12) composed of
One wall (20) constituting the corner (12) is a locking double wall (20) composed of an inner layer (21) and an outer layer (26),
The inner layer (21) is a first inner locking piece (latching each other in the direction along the locking double wall (20) by the small facets (22a, 23a) coming into contact with each other. 22) and the second inner locking piece (23),
The outer layer (26) is integrated with a part (22e, 23e) of the outer wall surface (22b, 23b) of the first inner locking piece (22) and the second inner locking piece (23), respectively. The inner side surfaces (27c, 28c) abut against the other portions (22d, 23d) of the outer wall surfaces (22b, 23b) of the second inner locking piece (23) and the first inner locking piece (22), respectively. Thus, the first outer locking piece (27) for locking the development of the second inner locking piece (23) and the first inner locking piece (22) in the direction crossing the locking double wall (20). ) And the second outer locking piece (28),
The first inner locking piece (22) and the second inner locking piece (23) form a quadrangle obtained by bisecting the quadrangular inner layer (21) with a line segment (25) connecting the midpoints of opposite sides, The first outer locking piece (27) and the second outer locking piece (28) have a quadrangular outer layer (18) and a concave portion (19) which are relatively fitted to each other. A packaging member characterized by forming a quadrangle obtained by dividing 26) into a line segment (30) intersecting the line segment (25) of the inner layer (21) . A sheet material including a plurality of walls (11, 15, 17, 20) and having a thickness of 1.5 mm or more is bent from a flattened state, and three walls (11, 15, 17, 20) are formed. In the packaging member (10) in an assembled state having at least one corner (12) composed of
One wall (20) constituting the corner (12) is a locking double wall (20) composed of an inner layer (21) and an outer layer (26),
The inner layer (21) is a first inner locking piece (latching each other in the direction along the locking double wall (20) by the small facets (22a, 23a) coming into contact with each other. 22) and the second inner locking piece (23),
The outer layer (26) is integrated with a part (22e, 23e) of the outer wall surface (22b, 23b) of the first inner locking piece (22) and the second inner locking piece (23), respectively. The inner side surfaces (27c, 28c) abut against the other portions (22d, 23d) of the outer wall surfaces (22b, 23b) of the second inner locking piece (23) and the first inner locking piece (22), respectively. Thus, the first outer locking piece (27) for locking the development of the second inner locking piece (23) and the first inner locking piece (22) in the direction crossing the locking double wall (20). ) And the second outer locking piece (28),
The first inner locking piece (22) and the second inner locking piece (23) connect the midpoint of two sides (21f) extending from the corner (12) through the triangular inner layer (21). The first outer locking piece (27) and the second outer locking piece (28) form a triangular outer layer (26) and the inner layer (21). A packaging member characterized by forming a triangle or a quadrangle divided by a line segment (72) intersecting the line segment (73) . The inner wall surface (22c, 23c) of the inner layer (21) has a contact portion between the small inner surfaces (22a, 23a) of the first inner locking piece (22) and the second inner locking piece (23). The packaging member according to any one of claims 1 to 3, wherein the packaging member is flush with no step . The small edge surfaces (27a, 28a) of the first outer locking piece (27) and the second outer locking piece (28) can come into contact with each other, and the outer surface (27b) of the outer layer (26). , 28b) are flush with each other except for the contact points between the small edge surfaces (27a, 28a) of the first outer locking piece (27) and the second outer locking piece (28). The packaging member according to any one of claims 1 to 4 . Other portions (22d, 23d) of the outer wall surfaces (22b, 23b) of the second inner locking piece (23) and the first inner locking piece (22), the first outer locking piece (27), and the The inner side surfaces (27c, 28c) of the second outer locking piece (28) are not bonded to each other, and the outer layer (26) is pressed inwardly to press the first inner locking piece (22) and the The sheet material can be returned to a flat plate-like unfolded state by removing the contact between the small edge surfaces (22a, 23a) of the second inner locking piece (23). The packaging member described in 1 . The packing member according to any one of claims 1 to 6, wherein the packing member is a corner pad that is applied from the outside to a corner portion including at least three surfaces of the article (90) to protect the corner portion. . The packing member according to any one of claims 1 to 6, wherein the packing member is a box for storing an article therein .

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