JP3149073B2 - Packing cushioning structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cushioning structure for packing used for cushioning an object to be packed such as electric equipment.

[0002]

2. Description of the Related Art The role of packaging material ends as soon as a product reaches a user. For the user, the packaging material is
The image of "bulky garbage" is persistent. In addition, in recent years, from the viewpoint of environmental issues, legal tightening of packaging materials has become severe.

[0003] One of the basic policies for reducing refuse from packaging materials is to use recyclable materials.

As shown in FIG. 44, a conventional packing structure of this type is provided at each corner of a packing box 80 and an article 81 to be packed. The packing cushioning member 82 inserted into the container and in contact with the object to be packed 81 and the inner wall portion of the packing box 80, and a holding lid 83 inserted into the packing box 80 and holding the object to be packed 81. Some have been provided.

In such a packing structure, a packing cushion made of styrofoam is used for the packing cushion 82, and a styrofoam spacer is attached to a base 84 made of corrugated cardboard for the holding cover 83. 85 was used.

[0006]

As described above, in the conventional packing structure, the packing cushioning material 8 made of polystyrene foam is used.
2 is used, and the holding lid 83 has a spacer 85 made of styrene foam.

[0007] Since this styrofoam is a resin, the furnace is damaged when incinerated, and it is difficult to bury it because it is bulky. In addition, it is conceivable to pulverize and use it for building materials or return it to polystyrene (PS) resin before using it for injection molded products such as cassette tapes and toys. However, at present, this recycling is costly. And have
Immediately, there has been a demand for the emergence of a packaging structure that does not damage the furnace even when incinerated, is not bulky, and can be easily recycled.

The present invention has been made in view of the above circumstances, and a first object of the present invention is to eliminate the need for a large storage space even if a large number of them are stacked, Another object of the present invention is to provide a packing cushioning structure that facilitates transportation.

It is a second object of the present invention to provide a packaging cushioning structure which not only enables incineration after use but also facilitates recycling and is environmentally friendly. .

[0010]

In order to achieve the above-mentioned first object, the present invention is to form a holding lid body, which is inserted into a packing box body and holds an object to be packed, from a single material. ,
The unfolded shape of the material has a shape conforming to the shape of the opening of the packing box, and a plurality of folds having an engagement protrusion at a front end on a surface portion of the material and a fold line formed at an intermediate portion. The bent piece is formed by cutting, and a plurality of engagement holes are formed to engage with each of the engagement protrusions, and each of the bent pieces is bent into a mountain shape at the fold line portion to form the engagement. It is characterized in that a structure is employed in which a spacer that also serves as a buffer is assembled by engaging a projection with the engagement hole.

In order to achieve the second object, according to the present invention, in the packing cushioning structure according to the first aspect, corrugated paper is used for each material of the holding cover.

[0012]

With this structure, the spacer can be assembled by bending the bent piece into a mountain shape at the fold line portion and engaging the engaging projection with the engaging hole. The presser lid, a bent piece having an engagement protrusion at the tip from a single material and forming a fold line on the bent piece,
Since a single piece of material is formed with an engagement hole, even if a large number of these cover lids are stacked, they do not become bulky, do not require a large storage space, and can be easily transported.

Further, by using corrugated paper as the material of the holding lid, not only can it be incinerated after use, but also it can be easily recycled and inexpensive.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a disassembled state of a packing structure provided with a packing cushioning material structure according to the present invention. This packing structure
A packing box 1, a plurality of packing cushioning materials 2, and a holding lid 3 having a packing cushioning material structure according to the present invention are provided.

The packing box 1 is a generally used cardboard box, and includes left and right sides 4 and 5 and front and rear sides 6 and 7.
And left and right side surfaces 4 and 5 and front and rear side surfaces 6 and 7 with foldable lid pieces 4 on upper edges thereof.
a, 5a, 6a, and 7a, and these lid pieces 4a, 5a
The opening 1a is opened and closed by a, 6a and 7a.

The cushioning material 2 for packing is a so-called corner pad, which is applied to each corner of the article 9 to be packed. The cushioning material 2 for packing is made of corrugated paper 10. This corrugated paper 10 is shown in FIG.
As shown in (1) and (2), a corrugated sheet core material 13 is interposed between the double flute 11 and the inner kraft runner 12 and adhered to each other, and between the inner kraft runner 12 and the outer kraft runner 14. A double flute 11, a corrugated sheet core 13, and an inner kraft runner 12 form an A flute 100, and the inner kraft runner 12 is The plate core 15 and the outer craft runner 14 constitute a B flute 200. In this case, the height of the corrugated sheet core 13 of the A flute 100 is equal to the height of the corrugated sheet core 15 of the B flute 200.
A flute 100 is softer than B flute 200.

The packing cushioning material 2 is made of the corrugated paper 1
0 is cut by a cutting machine, molded, and then folded and assembled. For this molding, a cutting die 16 shown in FIGS. 3 and 4 is used. The cutting die 16 is provided with a base 17, and a cutting blade 18 is attached to a surface of the base 17 in a state where the cushioning material 2 for packing is unfolded. A forming blade 20 that forms the folding line portion 19 in the expanded form 300 of the packing cushioning material 2 is attached. The height of the forming blade 20 is slightly lower than that of the cutting blade 18 so that the double flute 11 outside the corrugated paper 10 remains without being cut after cutting, so-called half punching.

The packing cushioning material 2 includes various types such as single fold, double fold, triple fold, double lap, and triple lap. The double-folded packing cushioning material 2 will be described below, and the single-folded, triple-folded, double-folded, and triple-folded packing cushioning materials 2 will be described later.

The unfolded mold 300 of the double-folded packing cushioning material 2 is cut by the cutting machine. This cutting,
As shown in FIG. 5, the cutting die 16 is placed on the table of the cutting machine.
And put the corrugated paper 10 on the cutting die 16.
The pressing plate 21 is pressed by the press with the A flute 100 facing upward, the mold is cut by the cutting blade 18 of the cutting die 16, and the folding line portion 19 is formed by the forming blade 20. The folding line 19 is formed by the double flute 11. FIG.
FIG. 1 shows the corrugated paper 10 after being cut by two cutting dies 16.

In the packing cushioning material 2 cut as described above, in the unfolded mold 300 as shown in FIG.
Before, Z after, L for left, R for right
The packing cushioning material 2 includes a first surface portion 22, a second surface portion 23 connected to a front edge of the first surface portion 22 via a first folding line portion 19 a, and a first surface portion 22. A third surface portion 24 connected to the right rear edge portion via a second folding line portion 19b, and a fourth surface portion 25 connected to the left rear edge portion of the first surface portion 22 via a third folding line portion 19c. A fifth surface portion 26 connected to the right rear edge of the third surface portion 24 via the fourth fold line portion 19d;
A sixth rear surface 27 is provided on the left rear edge of the fourth rear surface 25 via a fifth fold line portion 19e, and is provided on each outer edge of the third rear surface 24 and the fifth rear surface 26. Is formed with a V-shaped notch 28 centered on the fourth fold line portion 19d, and a fifth fold is formed at the outer edge of each of the fourth surface portion 25 and the sixth surface portion 27. A V-shaped notch 29 is formed around the line portion 19e.

Further, the engaging projections 30 in the right front edge of the second surface portion 23, also engaging recess 31 in the left front edge Yes forms respectively, also after the left of the third surface portion 24 Two engaging recesses 32 are provided on the edge, and the right side of the fourth surface 25 is provided.
Trailing the edge are two pieces of engagement projections 33 Oh <br/> formed respectively, in the right rear edge of the fifth surface portion 26 engaging recess 34, or
An engagement protrusion 35 is formed on the left rear edge of the sixth surface 27.

The expanded form 300 of the packing cushioning material 2 formed as described above is folded as shown in FIGS. 8 (1) and 8 (2) to form the packing cushioning material 2 shown in FIG. 8 (3). Finished products 36
Is made. That is, the second surface portion 23 is folded at the front fold line portion 19a as shown by the arrow and overlaps the first surface portion 22, and the fifth surface portion 26 is folded by the fourth fold line portion 19 as shown by the arrow.
d, overlaps the third surface portion 24, and the sixth surface portion 27
Is folded at the fifth fold line portion 19e as indicated by the arrow to form the fourth
On the surface portion 25 of FIG.

Next, the superposed fifth and third surface portions 2
6 and 24 are folded at the second folding line portion 19b as shown by the arrow, and the engaging protrusion 30 is engaged with the engaging concave portion 34, and the sixth and fourth surface portions 27 and 25 which are overlapped are shown by the arrow. Third
At the fold line portion 19c, and the engagement protrusion 3
5 and the engagement protrusion 33 is engaged with the engagement recess 32 to obtain a finished product 36 of the cushioning material 2 for packing.

In this case, as shown in FIG. 9, at the bottom portion D, left side portion E and right side portion F of the finished product 36, the B flute 200 of the corrugated paper 10 is located on the front side, and the A flute 100 is located inside. Is located. B flute 2
00 is harder than A flute 100 and A flute 10
No. 0 is excellent in cushioning property (cushioning property), so that when the B flute 200 comes into contact with the packaged object 9 and the inner surface of the packing box 1, the load is received on the entire surface, and the internal A The load is transmitted to the entire flute 100 to obtain a good cushioning property.

The holding lid 3 is a so-called ceiling pad, and as shown in FIGS.
A lid body 37 made of corrugated paper 10 conforming to the shape of the opening 1a is provided, and a plurality of bent pieces 38 are formed by cuts 39 on the surface of the lid body 37. These bent pieces 38 are cantilevered pieces, are provided with engaging projections 40 at the front ends thereof, and have fold lines 41 and 42 formed at their base and intermediate portions. In the surface of the lid main body 37, the engagement hole 43 is located near the base of the bent piece 38.
And a notch 44 is formed at one end of the lid body 37.

The outer shape of the lid body 37, the bent piece 38, the fold lines 41 and 42 of the bent piece 38, the engaging hole 43 and the notch 44 are formed at once by a cutting machine. The lines 41 and 42 are formed by crushing the corrugated paper 10 into a line.

The bent piece 38 is bent upward at a fold line 41 and bent downward at a fold line 42 to form the bent piece 38 into a mountain shape. Each of the bent pieces 38 engages with each other to form a spacer S which also serves as a buffer.

Next, the packing of the article 9 to be packed using the packing box 1, the plurality of packing cushioning materials 2, and the holding lid 3 configured as described above will be described.

First, as shown in FIG. 1, the cushioning material for packing 2 is applied to each corner of the article to be packed 9 and inserted into the box 1 for packing. The body 3 is inserted into the packing box 1, and the cords 45 connected to the article to be packed 9 are led out of the notch 44 of the holding lid 3 onto the holding lid 3, and the cords 45. Is located between the spacers S. Then, the lid pieces 4a, 5a of the packing box 1,
The opening 1a is closed by 6a and 7a. In this case, the lid piece 4
The inner surfaces of a, 5a, 6a, and 7a are in contact with the upper end of the spacer S.

Next, a modification of the packing structure provided with the cushioning structure for packing according to the present invention will be described with reference to FIG.

FIG. 12 is an exploded perspective view of a second packing structure provided with a packing cushioning structure according to the present invention.
This packing structure has an inclined surface 91, and is applied when packing an object 9 'that does not have a rectangular parallelepiped shape, and includes a packing box 1 and an object 9'. It is provided with four packing cushioning materials 2 and pressing lids 3 applied to the four corners of the bottom surface.

Hereinafter, the packing of the packaged object 9 'will be described.
First, as shown in FIG. 12, the packing cushioning material 2 is applied to the four corners of the bottom surface of the packaged object 9 ′,
Then, the holding cover 3 is inserted into the packing box 1, and the cords 45 connected to the packaged object 9 ′ are inserted through the cutout portions 44 of the holding cover 3. 3 and the cords 45 are positioned between the spacers S. Then, the lid pieces 4a, 5a, 6a, 7a of the packing box 1
To close the opening 1a. In this case, the lid pieces 4a, 5a,
The inner surfaces of 6a and 7a are in contact with the upper end of the spacer S.

FIG. 13 shows a double-folded cushioning material 2 for packing.
24 to FIG. 24. 13 and FIG.
In 2, Y indicates front, Z indicates back , L indicates left, and R indicates right . The cushioning material 2 for packing shown in FIG. 13 includes a first surface portion 22, a second surface portion 23 connected to a front edge portion of the first surface portion 22 via a first fold line portion 19a, and a first surface portion. 2
The third surface 24 connected to the right rear edge of the second unit via the second folding line portion 19b, and the fourth surface connected to the left rear edge of the first surface 22 via the third folding line 19c. A surface portion 25, a fifth surface portion 26 connected to the right rear edge of the third surface portion 24 via a fourth fold line portion 19d, and a fifth fold line portion to the left rear edge portion of the fourth surface portion 25 A V-shaped notch centered on the fourth fold line portion 19d at the outer edge of each of the third surface portion 24 and the fifth surface portion 26; A portion 28 is formed, and a V-shaped notch 29 centering on the fifth fold line portion 19e is formed at the outer edge of each of the fourth surface portion 25 and the sixth surface portion 27. It is.

Further, the engaging projections 30 in the right front edge of the second surface portion 23, also engaging recess 31 in the left front edge Yes forms respectively, also after the right of the fifth surface portion 26 On the edge
An engagement recess 34 is provided, and an engagement recess 34a is provided on the left rear edge.
A right rear edge of the sixth surface 27
On the left rear edge portion.
a are formed, the second surface portion 23 is folded at the front folding line portion 19a and overlaps the first surface portion 22, and the fifth surface portion 26 is folded at the fourth folding line portion 19d to form the third surface portion. 24, and the sixth surface portion 27 is connected to the fifth fold line portion 19e.
And laid on the fourth surface 25.

Next, the superposed fifth and third surface portions 2
6 and 24 are folded at the second folding line portion 19b,
4, the engaging projection 30 is engaged, and the superposed sixth and fourth surface portions 27 and 25 are folded at the third folding line portion 19c,
The engaging protrusion 35a is engaged with the engaging concave portion 31, and the engaging protrusion 35 is engaged with the engaging concave portion 34a to obtain a completed product 36 of the cushioning material 2 for packing.

The packing cushioning material 2 shown in FIG. 14 has a shape in which the V-shaped notches 28 and 29 in the packing cushioning material 2 shown in FIG. 13 are not formed. This is the same as the case of the packing cushioning material 2 shown in FIG.

In the cushioning material 2 for packing shown in FIG. 15, the first surface portion 22 and the second surface connected to the front edge portion of the first surface portion 22 via the first folding line portion 19a. Surface portion 23,
A third rear surface portion 24 connected to the right rear edge portion of the first surface portion 22 via the second folding line portion 19b, and a left rear edge of the first surface portion 22
Fourth surface portion continuous through a third fold line portion 19c in Part 2
5 and a fourth fold line portion 19 at the right front edge of the third surface portion 24.
d of the fifth surface portion 26 and the fourth surface portion 25
The left front edge portion has a sixth surface portion 27 connected via a fifth fold line portion 19e, and the outer rim portions of the third surface portion 24 and the fifth surface portion 26 have fourth fold line portions. A V-shaped notch 28 having a center at 19d is formed, and the outer edge of each of the fourth surface portion 25 and the sixth surface portion 27 has a fifth folding line portion 19e at the center. A V-shaped notch 29 is formed.

An engagement protrusion 30 is formed on the right front edge of the second surface portion 23, and an engagement recess 31 is formed on the left front edge , and a right front edge of the fifth surface portion 26 is formed. Is engaged
A recess 32 is provided, and an engagement recess 32a is provided at the left front edge.
And the right front edge of the sixth surface 27 is engaged
A projection 33 is formed on the left front edge, and an engagement projection 33a is formed on the left front edge .

Then, the second surface portion 23 is folded at the first folding line portion 19a and overlapped with the first surface portion 22, and the fifth surface portion 26 is folded at the fourth folding line portion 19d to form the third surface portion. 24, and the sixth surface portion 27 is connected to the fifth fold line portion 19e.
And laid on the fourth surface 25. Next, the superimposed fifth and third surface portions 26 and 24 are connected to the second folding line portion 1.
9b, the engaging protrusion 30 is engaged with the engaging concave portion 32a, and the sixth and fourth surface portions 27 and 25 that have been
At the fold line portion 19c, and the engagement protrusion 3
3 and the engaging projection 33a is engaged with the engaging recess 32.
To obtain the finished product 36 of the cushioning material 2 for packing.

The packing cushioning material 2 shown in FIG. 16 has a first surface portion 22 and a second surface portion 23 connected to the right front edge of the first surface portion 22 via a first folding line portion 19a. A third surface portion 24 connected to the right rear edge of the first surface portion 22 via the second folding line portion 19b, and a third folding line portion 19c to the left rear edge portion of the first surface portion 22 via the third folding line portion 19c. A fourth surface portion 25,
A fifth rear surface 26 which is connected to the right rear edge of the third rear surface 24 via the fourth folding line 19d, and a left rear edge of the fourth rear surface 25.
Sixth surface portion continuous to part via a fifth fold line portion 19e 2
7, the outer edge of each of the first surface portion 22 and the second surface portion 23 has a V centered on the first folding line portion 19a.
A V-shaped notch 28 centered on the fourth fold line portion 19d is formed at the outer edge of each of the third surface portion 24 and the fifth surface portion 26. A V-shaped notch 29 having a fifth folding line portion 19e as a center is formed at an outer edge of each of the fourth surface portion 25 and the sixth surface portion 27.

Further, the engaging recess 31 in the right front edge of the second surface portion 23, also in the right rear edge Yes an engaging projection 30 is formed respectively, the right rear edge of the fifth surface portion 26 Part is concave
The engaging portion 32 is formed on the right rear edge of the sixth surface portion 27, and the engaging recess 32a is formed on the left rear edge portion . An engagement protrusion 33a is formed on the left rear edge of the surface 27.

Then, the second surface portion 23 is folded at the first folding line portion 19a and overlaps the first surface portion 22, and the fifth surface portion 26 is folded at the fourth folding line portion 19d to form the third surface portion 2.
4, the sixth surface portion 27 is folded at the fifth folding line portion 19e and overlapped with the fourth surface portion 25. Next, the superimposed fifth and third surface portions 26 and 24 are connected to the second folding line portion 19b.
, The engaging protrusion 30 is engaged with the engaging concave portion 32, and the superposed sixth and fourth surface portions 27 and 25 are folded at the third folding line portion 19 c to engage with the engaging concave portion 31. The finished product 36 of the packing cushioning material 2 is obtained by engaging the projection 33 and the engaging projection 33a with the engaging recess 32a.

The packing cushioning material 2 shown in FIG. 17 has a first surface portion 22 and a second surface portion 23 connected to the left front edge of the first surface portion 22 via a first folding line portion 19a. A third surface portion 24 connected to the right rear edge of the first surface portion 22 via the second folding line portion 19b, and a third folding line portion 19c to the left rear edge portion of the first surface portion 22 via the third folding line portion 19c. A fourth surface portion 25,
A fifth surface portion 26 connected to the right rear edge of the third surface portion 24 via the fourth fold line portion 19d, and a fifth fold line portion 19e to the left rear edge portion of the fourth surface portion 25 with the fifth fold line portion 19e. 6th surface part 2 which continues
7 and the outer edge of each of the first surface portion 22 and the second surface portion 23 has a V centered on the fifth fold line portion 19a.
A V-shaped notch 28 centered on the fourth fold line portion 19d is formed at the outer edge of each of the third surface portion 24 and the fifth surface portion 26. A V-shaped notch 29 centering on the fifth folding line 19e is formed at the outer edge of each of the fourth surface portion 25 and the sixth surface portion 27.

An engagement protrusion 3 is provided on the left front edge of the second surface 23.
0, an engagement recess 31 is formed at the left rear edge, and an engagement recess 32 is formed at the right rear edge of the fifth surface portion 26.
An engagement recess 32a is formed at the left rear edge, and an engagement protrusion 33 is formed at the right rear edge of the sixth surface 27.
However, an engagement protrusion 33a is formed on the left rear edge .

Then, the second surface portion 23 is folded at the first folding line portion 19a and overlaps the first surface portion 22, and the fifth surface portion 26 is folded at the fourth folding line portion 19d to form the third surface portion 2.
4, the sixth surface portion 27 is folded at the fifth folding line portion 19e and overlapped with the fourth surface portion 25. Next, the superimposed fifth and third surface portions 26 and 24 are connected to the second folding line portion 19b.
, The engaging protrusion 30 is engaged with the engaging concave portion 32, and the superposed sixth and fourth surface portions 27 and 25 are folded at the third folding line portion 19 c to engage with the engaging concave portion 31. The completed product 36 of the packing cushioning material 2 is obtained by engaging the projection 33a and the engaging projection 33 with the engaging recess 32a.

The cushioning material 2 for packing shown in FIG. 18 has a first surface portion 22 and a second surface portion 23 connected to the front edge of the first surface portion 22 via a first folding line portion 19a. A third surface portion 24 connected to the right rear edge of the first surface portion 22 via the second folding line portion 19b, and a third rear surface portion of the first surface portion 22 at the left rear edge portion .
The fourth surface portion 25 connected via the fold line portion 19c, the fifth surface portion 26 connected to the right front edge of the third surface portion 24 via the fourth fold line portion 19d, and the fourth surface portion 25 A sixth surface 27 connected to the left front edge via a fifth folding line 19e.
And

An engagement protrusion 30 is formed on the right front edge of the second surface portion 23, and an engagement recess 31 is formed on the left front edge thereof. The engagement protrusion 30 is formed on the right front edge of the fifth surface portion 26. Is engaged
A recess 32 is formed on the left front edge, and an engagement recess 32a is formed on the left front edge, and an engagement recess 32a is formed on the right front edge of the sixth surface portion 27.
The projection 33 has an engagement projection 33a on the left front edge.
Each is formed.

Then, the second surface portion 23 is folded at the first folding line portion 19a and overlaps the first surface portion 22, and the fifth surface portion 26 is folded at the fourth folding line portion 19d to form the third surface portion 2.
4, the sixth surface portion 27 is folded at the fifth folding line portion 19e and overlapped with the fourth surface portion 25. Next, the superimposed fifth and third surface portions 26 and 24 are connected to the second folding line portion 19b.
, The engaging protrusion 30 is engaged with the engaging concave portion 32, and the superposed sixth and fourth surface portions 27 and 25 are folded at the third folding line portion 19 c to engage with the engaging concave portion 31. The completed product 36 of the packing cushioning material 2 is obtained by engaging the projection 33a and the engaging projection 33 with the engaging recess 32a.

The packing cushioning material 2 shown in FIG. 19 has a first surface portion 22 and a second surface portion 23 connected to the right front edge of the first surface portion 22 via a first folding line portion 19a. A third surface portion 24 connected to the right rear edge of the first surface portion 22 via the second folding line portion 19b, and a third folding line portion 19c to the left rear edge portion of the first surface portion 22 via the third folding line portion 19c. A fourth surface portion 25,
A fifth surface portion 26 connected to the right rear edge of the third surface portion 24 via the fourth fold line portion 19d, and a fifth fold line portion 19e to the left rear edge portion of the fourth surface portion 25 with the fifth fold line portion 19e. 6th surface part 2 which continues
7 are provided. An engagement recess 32 is formed on the left rear edge of the fifth surface 26, and an engagement protrusion 33 is formed on the right rear edge of the sixth surface 27.

Then, the second surface portion 23 is folded at the first folding line portion 19a and overlaps the first surface portion 22, and the fifth surface portion 26 is folded at the fourth folding line portion 19d to form the third surface portion. 24, and the sixth surface portion 27 is connected to the fifth fold line portion 19e.
And laid on the fourth surface 25. Next, the superimposed fifth and third surface portions 26 and 24 are connected to the second folding line portion 1.
The sixth and fourth surface portions 27, 2 folded and superposed at 9b
5 is folded at the third folding line portion 19c, and the engaging protrusion 33 is engaged with the engaging concave portion 32, thereby obtaining a completed product 36 of the cushioning material 2 for packing.

In the packing cushioning material 2 shown in FIG. 20, the first surface portion 22, the second surface portion 23, and the third surface portion 2 are provided.
4, the arrangement of the fourth surface portion 25, the fifth surface portion 26, and the sixth surface portion 27 is the same as that of the packing cushioning material 2 shown in FIG. Are different.

That is, an engagement recess 31 is formed at the right front edge of the second surface portion 23, and an engagement protrusion 30 is formed at the right rear edge , respectively, and the left rear edge of the third surface portion 24 is formed. An engagement concave portion 32b is formed in the portion, and the right rear edge of the fifth surface portion 26 is formed.
Portion has an engagement recess 32, and a left rear edge has an engagement recess 3
2a are formed respectively , and the right rear edge of the fourth surface portion 25 is formed.
An engagement projection 33b is formed on the sixth surface portion 27.
The engagement projection 33 is provided on the right rear edge of the
The mating projections 33a are respectively formed.

Then, the second surface portion 23 is folded at the first folding line portion 19a and overlapped on the first surface portion 22, and the fifth surface portion 26 is folded at the fourth folding line portion 19d to form the third surface portion. 24, and the sixth surface portion 27 is connected to the fifth fold line portion 19e.
And laid on the fourth surface 25. Next, the superimposed fifth and third surface portions 26 and 24 are connected to the second folding line portion 1.
9b, the engagement protrusion 30 is engaged with the engagement recess 32, and the sixth and fourth surface portions 27 and 25 that have been
At the fold line portion 19c, and the engagement protrusion 3
3a and the engaging projection 33 is engaged with the engaging recess 32.
The completed product 36 of the cushioning material 2 for packing is obtained by engaging the engaging projections 33b with the respective engaging recesses 32b at a.

In the packing cushioning material 2 shown in FIG. 21, the first surface portion 22, the second surface portion 23, and the third surface portion 2 are provided.
4, the arrangement of the fourth surface portion 25, the fifth surface portion 26, and the sixth surface portion 27 is the same as that of the packing cushioning material 2 shown in FIG. Are different.

That is, two engagement recesses 31 are provided at the right front edge of the second surface portion 23, and two engagement recesses 31 are provided at the right rear edge.
Protrusions 30 are formed respectively , and right of the fifth surface portion 26
Two engagement recesses 32 are provided at the rear edge, and at the left rear edge,
Two engagement recesses 32a are formed respectively , and two engagement protrusions 33 are provided on the right rear edge of the sixth surface 27.
In addition, two engagement projections 33a are formed on the left rear edge, respectively .

Then, the second surface portion 23 is folded at the first folding line portion 19a and overlaps the first surface portion 22, and the fifth surface portion 26 is folded at the fourth folding line portion 19d to form the third surface portion 2.
4, the sixth surface portion 27 is folded at the fifth folding line portion 19e and overlapped with the fourth surface portion 25. Next, the superimposed fifth and third surface portions 26 and 24 are connected to the second folding line portion 19b.
, The engaging protrusion 30 is engaged with the engaging concave portion 32, and the superposed sixth and fourth surface portions 27 and 25 are folded at the third folding line portion 19 c to engage with the engaging concave portion 31. The completed product 36 of the packing cushioning material 2 is obtained by engaging the projection 33a and the engaging projection 33 with the engaging recess 32a.

The packing cushioning material 2 shown in FIG. 22 has a first surface portion 22 and a second surface portion 23 connected to the left front edge of the first surface portion 22 via a first folding line portion 19a. A third rear surface portion 24 connected to the left rear edge of the first surface portion 22 via the second fold line portion 19b, and a third rear fold line portion 19c to the right rear edge portion of the first surface portion 22 via the third fold line portion 19c. A fourth surface portion 25,
A fifth surface portion 26 connected to the left front edge portion of the third surface portion 24 via the fourth folding line portion 19d, and a left rear edge of the fourth surface portion 25
Sixth surface portion continuous to part via a fifth fold line portion 19e 2
7 are provided.

[0058] Then, the engaging recess 31 in the left front edge of the second surface portion 23, also engaging recess 30a after the left edge Yes forms respectively, left front edge of the fifth surface portion 26 , An engagement projection 30 is formed on the right front edge, and an engagement recess 31a is formed on the right front edge . An engagement recess 34 is formed on the right front edge of the sixth surface 27, and an engagement protrusion 33 is formed on the left front edge of the sixth surface 27.

Then, as shown in FIG.
3 is folded at a first folding line portion 19a to form a first surface portion 22.
, The fifth surface 26 is folded at the fourth fold 19 d and overlaps the third surface 24, and the sixth surface 27 is folded at the fifth fold 19 e and overlaps the fourth surface 25. .
Next, the superimposed fifth and third surface portions 26 and 24 are folded at the second fold line portion 19b, and the superimposed sixth and fourth surface portions 26 and 24 are folded.
Are folded at the third folding line portion 19c so that the engaging projections 33 are engaged with the engaging concave portions 31, the engaging projections 30 are engaged with the engaging concave portions 34, and the engaging concave portions 31a are formed with the engaging concave portions 31a. The engaging protrusions 30a are engaged with each other to obtain a finished product 36 of the cushioning material 2 for packing shown in FIG.

In the packing cushioning material 2 shown in FIG. 22, the plan shapes of the engaging recesses 31, 31a and 34 are shown in FIG.
5, the engaging recesses 31, 31 are formed.
The planar shape of the engaging projections 33, 30a, 30 with which the a, 34 engages may be inverted trapezoidal. In this case, the engagement recesses 31,
31a and 34, the dimension L1 of the short side portion 80 and the engagement protrusion 33,
The dimension L2 of the short side portion 81 of 30a, 30 is the same. Then, the engaging protrusions 3 are inserted into the engaging recesses 31, 31a, 34.
When the three sides 30, 30a, 30 intersect at right angles, the short sides 80, 81 coincide with each other, and the engaging projections 33, 30a, 3
The zero acute angle portion 82 is hooked on the lower edges of the left and right sides 83, 84 of the engagement concave portions 31, 31a, 34, thereby ensuring the engagement.

The planar shape of the engaging recesses 31, 31a, 34 is quadrangular as shown in FIG. 26, with triangular projections 87, 88 formed on the left and right sides 85, 86, respectively. The planar shape of the engaging projections 33, 30a, 30 with which the engaging concave parts 31, 31a, 34 are engaged is rectangular, and triangular convex parts 91, 92 are formed on the left and right sides 89, 90 thereof.
May be formed. Then, the engagement recesses 31,
When the engaging protrusions 33, 30a, 30 are engaged with the engaging protrusions 33, 30a, 30 at right angles to the engaging protrusions 31a, 34, the protrusions 87, 88 of the engaging concave portions 31, 31a, 34 are located on the left of the engaging protrusions 33, 30a, 30, respectively. The right side portions 89, 90 bite into the A flute 100, and the projections 91, 92 of the engagement projections 33, 30a, 30 are engaged with the engagement recess 3
Biting into the A flutes 100 of the left and right sides 85, 86 of the 1, 31a, 34 to ensure the engagement.

The planar shape of the engaging recesses 31, 31a, 34 is rectangular as shown in FIG. 27, and corrugated portions 93 are formed on the left and right sides 85, 86 thereof. Engagement projections 33 with which 31, 31a, 34 engage
The plane shape of 30a, 30 may be quadrangular, and the wavy portion 94 may be formed on the left and right sides 89, 90 thereof. Then, the engagement protrusions 33, 30 are inserted into the engagement recesses 31, 31a, 34.
a, 30 are engaged at right angles to each other.
1, 31a, 34 are provided with engagement projections 33, 30.
The engagement between the left and right sides 89, 90 of the a, 30 is ensured by cutting into the corrugated portions 94.

The planar shape of the engaging recesses 31, 31a, 34 is quadrangular as shown in FIG. 28, and serrated portions 95 are formed on the left and right sides 85, 86 thereof. Engagement projection 3 with which recesses 31, 31a and 34 are engaged
The plane shape of 3, 30, a, 30 may be square, and the saw-toothed portion 96 may be formed on the left and right sides 89, 90 thereof. Then, the engaging protrusions 3 are inserted into the engaging recesses 31, 31a, 34.
3, 30a, 30 are engaged at right angles, the serrations 95 of the engaging recesses 31, 31a, 34
Serrated portions 9 of left and right sides 89, 90 of 3, 30a, 30
6 to ensure its engagement.

The engaging recesses 31, 31a, 34 and the engaging protrusions 33, 30 shown in FIGS. 25, 26, 27, and 28 are used.
The shapes of a and 30 are not limited to the other double-folding packing cushioning materials 2 but also to the triple-folding and single-folding packing cushioning materials 2 described later.
Are applied to the engagement recesses and engagement projections.

The triple-fold cushioning material 2 for packing is shown in FIGS. In FIG. 29 and FIG.
Z indicates the rear , L indicates the left, and R indicates the right . The packing cushioning material 2 has a first surface portion 2 as shown by its developed shape.
2, a second surface portion 23 connected to the right front edge portion of the first surface portion 22 via the first and sixth fold lines 19a and 19f, and a second rear surface portion of the first surface portion 22 at the right rear edge portion . A third surface portion 24 connected via the fold line portion 19b and a fourth surface portion 25 connected to the left rear edge of the first surface portion 22 via the third fold line portion 19c.
A fifth surface 26 connected to the right rear edge of the third surface 24 via fourth and seventh fold lines 19d and 19g;
Fifth and eighth fold line portions 19e are provided on the left rear edge of
A sixth surface 27 connected to the second surface 19 via the second surface 19h;
A third surface 36 connected to the left front edge of No. 3 via a ninth fold 19i, and an eighth surface 37 connected to the right front edge of the fifth surface 26 via a tenth fold 19j. And the sixth
And a ninth surface 38 that is continuous with the eleventh fold line portion 19k at the left front edge of the surface 27.

The third surface portion 24 and the fifth surface portion 26
A notch 39 is formed at the edge of each of the and the eighth surface 37, and the side 39a and the side 3
9b forms a V-shape about the fourth and seventh fold lines 19d and 19g, and the sides 39b and 39c form a V-shape about the ninth fold line 19i. ing. A notch 40 is formed at each edge of the fourth surface 25, the sixth surface 27, and the ninth surface 38. In this notch 40, the side 40a and the side 40b A V-shape centered on the eighth fold line portions 19e and 19h,
0b and the side 40c form a V-shape centered on the eleventh folding line portion 19k. Further, a notch 41 is formed at each edge of the first surface 22, the second surface 23, and the seventh surface 36, and a side 41 is formed in the notch 41.
a and the side 41b are the first and sixth fold line portions 19a and 19f.
, And the sides 41b and 41c form a V-shape centered on the ninth fold line portion 19i.

An engaging recess 48 is formed on the right front edge of the second surface portion 23 and an engaging protrusion 49 is formed on the right rear edge , respectively, and the left rear edge of the third surface portion 24 is formed. Is the engagement recess 50
Is formed on the right rear edge of the fourth surface 25, and an engagement protrusion 51 is formed on the right rear edge of the fifth surface 26.
An engagement recess 52 is provided on the left rear edge, and an engagement recess 53 is provided on the left rear edge.
Yes and respectively forming, on the right rear edge of the sixth surface portion 27 engaging
A mating projection 54 and an engaging projection 55 on the left rear edge
Each is formed. An engagement recess 56 is formed at the right front edge of the seventh surface portion 36, and an engagement protrusion 57 is formed at the left front edge portion. An engagement recess 56 is formed at the right front edge of the eighth surface portion 37.
In the left rear edge of the ninth surface portion 38, an engagement protrusion 58 is formed on the right rear edge portion.
60, and an engagement projection 61 is formed on the left rear edge .

The unfolded form 300 of the packing cushioning material 2 formed as described above is folded as shown in FIGS. 30, 31 (1) and (2), and is packed as shown in FIG. 31 (3). Lumber 2
Is completed.

That is, the seventh surface portion 36 is folded at the ninth fold line portion 19i as shown by the arrow in FIG. 30 and overlaps the second surface portion 23, and the eighth surface portion 37 is folded by the tenth fold as shown by the arrow. Folded at the line portion 19j and overlapped on the fifth surface portion 26,
Is folded at the eleventh folding line portion 19k as shown by the arrow and overlaps the sixth surface portion 27.

Next, the superposed second and seventh surface portions 2
31 and 36 are folded at the sixth and first folding line portions 19f and 19a as shown by arrows in FIG. 31 (1) and overlapped on the first surface portion 22, and the fifth and eighth surface portions 26 and 37 overlapped. Are folded at the seventh and fourth folding line portions 19g and 19d as indicated by arrows, and overlapped on the third surface portion 24.
Are folded at the eighth and fifth fold lines 19h and 19e as indicated by arrows, and overlap the fourth surface 25.

Next, the superimposed third, eighth, and fifth face portions 24, 37, and 26 are folded at the second folding line portion 19b as indicated by the arrow in FIG. ,
The ninth and sixth surface portions 25, 38, 27
At the fold line portion 19c to engage the engagement recesses 52, 59 with the engagement protrusions 49, 57,
The engagement projections 55 and 61 are engaged with the engagement projections 54 and 6.
0, 51 are engaged with the engaging recesses 53, 59, 50 to obtain a finished product 62 of the cushioning material 2 for packing.

FIG. 3 shows a modification of the triple-fold packing cushioning material 2.
It is shown in FIG. The cushioning material 2 for packing includes a first surface 22 and a second front surface connected to the right front edge of the first surface 22 via first and sixth fold lines 19a and 19f, as shown in the developed shape. Surface portion 23, a third surface portion 24 connected to the right rear edge of the first surface portion 22 via the second fold line portion 19b, and a third fold line at the left rear edge portion of the first surface portion 22. A fourth surface portion 25 connected via the portion 19c and a fifth surface portion connected to the right rear edge of the third surface portion 24 via the fourth and seventh fold line portions 19d and 19g.
The fifth and eighth surfaces are formed on the left rear edge of the fourth surface portion 25 and the fourth surface portion 25.
6th surface part 2 which continues via the folding line parts 19e and 19h of
7 and a ninth fold line portion 19 at the left front edge of the second surface portion 23.
i and a seventh surface 36 connected through the i.
An eighth line connected to the right front edge via a tenth fold line portion 19j
And a ninth surface portion 38 connected to the left front edge of the sixth surface portion 27 via an eleventh folding line portion 19k.

An engaging recess 64 is formed on the right front edge of the second surface portion 23 and an engaging protrusion 65 is formed on the right rear edge , respectively, and the left rear edge of the third surface portion 24 is formed on the second surface portion 23. Is the engagement recess 50
Is formed on the right rear edge of the fourth surface 25, and an engagement protrusion 51 is formed on the right rear edge of the fifth surface 26.
An engagement recess 52 is provided on the left rear edge, and an engagement recess 53 is provided on the left rear edge.
Yes and respectively forming, on the right rear edge of the sixth surface portion 27 engaging
A mating projection 54 and an engaging projection 55 on the left rear edge
Each is formed. The engaging recess 56 in the right front edge of the seventh surface portion 36, the engaging projection 57 which in the left front edge
Is Yes formed, the right front edge of the surface portion 37 of the eighth Kakarigo凹
In the left rear edge of the ninth surface portion 38, an engagement protrusion 59 is formed.
60, and an engagement projection 61 is formed on the left rear edge .

Then, the seventh surface portion 36 is folded at the ninth fold line portion 19i and overlapped on the second surface portion 23, and the eighth surface portion 37 is folded at the tenth fold line portion 19j to form the fifth surface portion 26. And the ninth surface portion 38 is connected to the eleventh folding line portion 19k.
And laid on the sixth surface 27.

Next, the superposed second and seventh surface portions 2
3, 36 are folded at the sixth and first folding line portions 19f and 19a and overlapped on the first surface portion 22, and the superposed fifth and eighth surface portions 26 and 37 are combined with the seventh and fourth folding line portions. 19g, 1
Folded at 9d and overlapped on the third surface portion 24, the sixth and ninth surface portions 27 and 38 thus overlapped are folded at eighth and fifth fold line portions 19h and 19e to be overlaid on the fourth surface portion 25.

Next, the superposed fifth, eighth, and third surface portions 26, 37, and 24 are folded at the second fold line portion 19b, and the superposed sixth, ninth, and fourth surface portions 27 are formed. , 3
8 and 25 at the third fold line portion 19c,
5 and 57 are engaged with the engaging recesses 52 and 59, the engaging recesses 64 and 56 are engaged with the engaging protrusions 55 and 61, and the engaging protrusions 54, 60 and 51 are engaged with the engaging recesses 50, 58, The completed product 62 of the cushioning material 2 for packing is obtained by engaging with the mating member 53.

FIG. 33 shows the single-folded cushioning material 2 for packing. The packing cushioning material 2 includes a first surface portion 22 and a right rear edge of the first surface portion 22 as shown in the developed shape of FIG.
Second surface portion contiguous through a first fold line portion 19a to Part 2
3, the second folding line portion 19 to the left rear edge of the first surface portion 22
b, a third concave portion 66 is provided on the left rear edge of the second planar portion 23, and the third concave portion 66 is provided on the third rear surface portion 2.
An engagement protrusion 67 is formed on the right rear edge of the reference numeral 4. The corners of the first, second, and third surface portions 22, 23, and 24 are all cut out to the same size.

Then, the second surface 23 is folded at the first folding line 19a, and the third surface 24 is folded at the second folding line 19b. In combination, a completed product 70 of the cushioning material for packing 2 shown in FIG. 33 (2) is obtained. In this case, for example, the first surface portion 22 becomes the bottom surface portion D, the second surface portion 23 becomes the right side surface portion F , and the third surface portion 2
4 is the left side E.

FIGS. 34 to 39 show modifications of the single-fold packing cushioning material 2. The cushioning material 2 for packing shown in FIG. 34 is formed by forming the outer edges of the first, second, and third surface portions 22, 23, and 24 in an arc shape, and the cushioning material 2 for packing shown in FIG.
In FIG. 36, only the corners of the first surface portion 22 are cut out linearly, and the cushioning material 2 for packing shown in FIG.
37 are formed in an arc shape, and the packing cushioning material 2 shown in FIG. 37 is formed by forming only the corners of the first surface portion 22 in a straight line, and the packing cushioning material shown in FIG. The material 2 is obtained by forming the first, second, and third surface portions 22, 23, and 24 into a square shape, and the packing cushioning material 2 shown in FIG. 39 has the first, second, and third surface portions 22, 23 and 24 are formed in a triangular shape. In each of the packing cushioning materials 2, an engaging concave portion 66 is formed on the left rear edge of the second surface portion 23, and the third surface portion 24 is formed.
Of a right rear edge of the engaging projections 67 respectively, the folding the second surface portion 23 in the first folding line portion 19a, folding the third surface portion 24 at the second fold line portion 19b, engaging The engaging protrusion 67 is engaged with the mating recess 66 to obtain a finished product 70 of the cushioning material 2 for packing.

Further, the finished product 70 of the single packing cushioning material 2
40 and 41 to form a finished product equivalent to the finished product 36 of the double-folded packing cushioning material 2 as shown in FIGS. 40 and 41, or a single product as shown in FIG. The completed product 70 of the cushioning material 2 for packing may be triple-stacked to form a completed product equivalent to the completed product 62 of the packing material 2 for triple folding. In this case, the intermediate packing cushioning material 2 is accommodated inside the outer packing cushioning material 2, and the inner packing cushioning material 2 is accommodated in the intermediate packing cushioning material 2. The packing cushioning material 2, the intermediate packing cushioning material 2, and the inner packing cushioning material 2 are smaller in this order.

When the finished product 70 of the single packing cushioning material 2 is overlapped to form the finished product 36 of the double-folded packing cushioning material 2, the completed product of the outer packing cushioning material 2 is formed. In 70, the B flute 200 is set outside and the A flute 100 is set inside, and in the finished product 70 of the cushioning material 2 for packing inside, the B flute 200 is set inside and the A flute 100 is set outside. In the case of overlapping, a portion in contact with the packing box 1 and a portion in contact with the packaged object 9 are B flutes 200. This is a single packing cushioning material 2
Cushioning material 2 for triple folding of the finished product 70
The same applies to the finished product 62.

As the material of the cushioning material 2 for packing and the cover 3, the corrugated paper 10 having one A flute 100 and one B flute 200 was used, but as shown in FIG. 39, two corrugated papers were used. 10, 10 to A flute 10
A double-layered structure bonded at the zero portion may be used, or a material other than the corrugated paper 10 such as a nonwoven fabric or a pulp mold may be used.

[0083]

As described above, according to the present invention, a holding lid body which is inserted into a packing box and presses an object to be packed is formed of a single material, and the developed shape of the material is changed to the packing shape. With a shape conforming to the shape of the opening of the box body, furthermore, on the surface portion of the material, an engaging protrusion is provided at the tip, and a plurality of bent pieces having a folding line formed at the middle portion are formed by cutting, A plurality of engagement holes for engaging the respective engagement protrusions are formed, and each of the bent pieces is bent into a mountain shape at the fold line portion so that the engagement protrusions are formed in the engagement hole. Since the spacer that engages and serves as a buffer is assembled, the holding lid body is configured such that the bent piece is bent into a chevron shape at the fold line portion, and the engaging protrusion is engaged with the engaging hole, and the spacer is engaged. Can be assembled.

The holding lid is formed by forming a bent piece having an engaging projection at the tip from a single material, forming a fold line on the bent piece, and forming an engaging hole in the material. Since it is a single piece, even if a large number of these cover lids are stacked, they do not become bulky, do not require a large storage space, and can be easily transported.

Further, according to the present invention, in the packing cushioning material structure according to the first aspect, corrugated paper is used for each material of the holding lid, so that not only incineration is possible after use but also recycling is possible. It will be easier and cheaper.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a packing structure including a packing cushioning structure according to the present invention.

FIG. 2A is a perspective view of a corrugated cardboard. (2) is a sectional view of the corrugated paper.

FIG. 3 is a perspective view of a cutting die.

FIG. 4 is a sectional view taken along line XX of FIG. 3;

FIG. 5 is an explanatory diagram of molding of a cushioning material for packing (corner pad).

FIG. 6 is a plan view of the corrugated cardboard after the cushioning material for packaging has been die-cut.

FIG. 7 is a plan view showing a deployed state of a double-folding type cushioning material for packing.

FIG. 8 (1) is a perspective view of a deployed state of a double-folding type cushioning material for packing. (2) is a perspective view of the packing cushioning material in a folded state. (3) is the perspective view seen from the inner surface side of the finished product of the cushioning material for packing.

FIG. 9 shows a completed product of a double-folding type cushioning material for packing .
It is the perspective view seen from the surface side .

FIG. 10 is a plan view of a holding lid body that is a packing cushioning material structure according to the present invention.

FIG. 11 is a perspective view of the presser lid.

FIG. 12 shows a second structure provided with the cushioning material structure for packing according to the present invention.
It is a perspective view of the disassembled state of the packing structure of FIG.

FIG. 13 is a plan view showing an expanded state of another packing cushioning material (corner pad) of the double folding type.

FIG. 14 is a plan view of a double-folding type other packing cushioning material in an unfolded state.

FIG. 15 is a plan view of a deployed state of another packing material of the double folding type.

FIG. 16 is a plan view of a deployed state of another packing material of a double folding type.

FIG. 17 is a plan view of another double-folding type cushioning material for packing in an unfolded state.

FIG. 18 is a plan view of another double-folding type cushioning material for packing in an unfolded state.

FIG. 19 is a plan view of another double-folding type cushioning material for packing in an unfolded state.

FIG. 20 is a plan view of the unfolded state of another packing material of the double folding type.

FIG. 21 is a plan view of another double-folding type cushioning material for packing in an unfolded state.

FIG. 22 is a perspective view showing an expanded state of another packing material for packing in a double folding type.

FIG. 23 is a perspective view of the cushioning material for packaging in a folded state.

FIG. 24 is a perspective view of the completed cushioning material for packaging as viewed from the inner surface side .

FIG. 25 is a plan view showing a modification of the shapes of the engagement recess and the engagement protrusion.

FIG. 26 is a plan view showing another modified example of the shapes of the engagement concave portion and the engagement protrusion.

FIG. 27 is a plan view showing another modified example of the shapes of the engagement concave portion and the engagement protrusion.

FIG. 28 is a plan view showing another modified example of the shapes of the engagement recess and the engagement protrusion.

FIG. 29 is a plan view of the triple-folding type packing cushioning material in an unfolded state.

FIG. 30 is a perspective view of the packing cushioning material in an expanded state.

FIG. 31 (1) is a perspective view of a triple-folding type cushioning material for packing in a single folded state. (2) is a perspective view of the packaging cushioning material in a double folded state. (3) is a perspective view from the front of the finished product of the cushioning material for packing.

FIG. 32 is a plan view showing another triple-folding type cushioning material for packing in an unfolded state.

FIG. 33 (1) is a perspective view of a single-folding type cushioning material for packing in an unfolded state. (2) is a perspective view from the front of the finished product of the cushioning material for packing.

FIG. 34 is a plan view of another single-folding type cushioning material for packing in an unfolded state.

FIG. 35 is a plan view showing another single-folding type cushioning material for packing in an unfolded state.

FIG. 36 is a plan view showing another unfolded cushioning material for packing in an unfolded state.

FIG. 37 is a plan view of another single-folding type cushioning material for packing in an unfolded state.

FIG. 38 is a plan view showing an unfolded state of another packing cushioning material of the one-fold type.

FIG. 39 is a plan view of another single-folding type cushioning material for packing in an unfolded state.

FIG. 40 is an explanatory view of a double fold of a completed product of a single-folding type cushioning material for packing.

FIG. 41 is a cross-sectional view of a double overlap of the completed packing cushioning material.

FIG. 42 is an explanatory view of a triple fold of a completed product of a single-folding type cushioning material for packing.

FIG. 43 is an explanatory diagram of bonding of two pieces of corrugated paper.

FIG. 44 is an exploded perspective view of a conventional packing structure.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 Packing box 2 Packing cushioning material 3 Holding lid 9 Packed object 10 Corrugated cardboard 19 Fold line portion 38 Folded piece 40 Engagement protrusion 41, 42 Fold line 43 Engagement hole S Spacer

Claims (2)

(57) [Claims] 1. A holding lid body, which is inserted into a packing box and presses an object to be packed, is formed of one sheet of material, and the shape of the material is adjusted to the shape of the opening of the packing box. Further, on the surface of the material, a plurality of bent pieces having an engaging projection at the tip and a folding line formed at the middle are formed by cutting, and each of the engaging projections is engaged. Forming a plurality of engagement holes, and bending each of the bent pieces into a mountain shape at the fold line portion to engage the engagement protrusions with the engagement holes and also serve as a buffer. A cushioning material for packing characterized by being assembled. 2. The packing cushioning structure according to claim 1, wherein corrugated paper is used as a material of the holding cover.