JPH0796972A - Foldable cardboard packing - Google Patents

Abstract

PURPOSE:To provide a foldable cardboard packing which is excellent in the buffering performance, compared with conventional foaming styrene packing and further which can be efficiently and cost-effectively produced. CONSTITUTION:A packing folded from a sheet of cardboard into a nearly rectangular parallelepiped, is provided with a square fitting recession in which a packing article is fitted at one of faces thereof and the four peripheral sides are surrounded by hollow double walls and the bottom face is received by support pieces 5 formed so as to rise up on folding the cardboard. In the cardboard, double wall-forming pieces 7-10 are connected to fold and make hollow double walls having a U-shaped cross section at the four sides of the rear face piece 6 forming the rear face of packing. Tearing lines I forming the bottom face pieces 11A, 11B of the fitting recession and reinforcing pieces 17 and reinforcing belts 5 are provided in the respective pieces. The tearing line E, F put over the opposite ends of the rear face piece and forming the support pieces 5 so as to cut and raise them and the folding lines G, H having a slant part by 45 are provided for the constitution. Shock absorbing crease lines Z are made in the direction perpendicular the direction of the impulsions, at the wall face of packing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conventional tape-recording device such as a video tape recorder, a microcomputer, etc., which is used for buffering and supporting both end portions of the packed articles when they are packed in a cardboard box. The present invention relates to a foldable corrugated cardboard packing which plays a role of replacing the polystyrene foam packing.

[0002]

2. Description of the Related Art The styrofoam packing is foam-molded in the shape of a rectangular parallelepiped block having a recess into which an end of a packaged article is fitted. Also, as another packing, attach several corrugated cardboard pieces cut into an arbitrary shape,
Packings that have been assembled into blocks of the desired shape have also been used.

[0003]

However, since Styrofoam is made from petroleum, which is a finite natural resource, as a raw material, it should be avoided as much as possible if it is used as a packaging material that is discarded as it is if it serves one transportation purpose. desirable. Also, from the viewpoint of measures to dispose of municipal waste, which is becoming more and more serious, Styrofoam is bulky, transport costs are high, it is not suitable for landfill, and if burned, it will generate high temperature and damage the incinerator. Due to the problems, the emergence of some alternative to this was desired. On the other hand, a piece made by sticking corrugated cardboard pieces is preferable because it is made from reproducible wood, recycled paper is easy to recycle, and disposal problems are far less than those of Styrofoam. The work is labor intensive and costly, and the buffer function is insufficient. Therefore, the object of the present invention is to use cardboard as a raw material, to make it efficiently and inexpensively, and to provide a cushioning function that is superior to conventional styrofoam packing and a laminated block body of corrugated cardboard, and is compact for storage and transportation. To provide a foldable cardboard packing that can be folded in.

[0004]

A foldable corrugated cardboard packing according to the present invention for achieving the above object is a single corrugated cardboard 1 having folds, cuts or the like at predetermined plural positions.
The packings 201 and 202 having a substantially rectangular parallelepiped outer shape with a rectangular fitting recess S into which a packaged article is fitted can be folded up simply by bending 01 and 102 along fold lines. The fitting recess S has a peripheral wall surrounded by hollow double walls 1 to 4, and a bottom surface thereof is supported by a support piece 5 formed in a cut-and-raised shape when the corrugated board is bent. . And the cardboard is 101,
Reference numeral 102 designates a back surface piece 6 serving as the back surface of the packings 201 and 202 as a main part, and parallel folds for bending and forming the hollow double walls 1 to 4 having a U-shaped cross section on four sides of the back surface piece 6. Double wall forming pieces 7 to 10 provided with X and Y are continuously provided via main folds A, A and B, B facing each other, and the bottom surface is formed on the double wall forming pieces 7 and 8. The bottom pieces 11A and 11B to be formed in a two-ply shape are connected to each other through folds C and D, respectively, and a cut I to form a strip-shaped reinforcing piece 12 for reinforcing the hollow double walls 3 and 4 is provided, and the opposing main parts are provided. A plurality of cut-and-raised cuts E and F and a main fold A for straddling the folds A and A to form the supporting piece 5 in a cut-and-raised shape.
The cut and raised folds G and H having inclined portions intersecting with each other at an angle of 45 degrees are provided, and the double wall forming pieces 9 and 10 are
The reinforcing piece 17 for reinforcing the hollow double walls 4 and 5 is folded into a fold U.
In order to fix the folded state of the packings 201 and 202, the double wall forming pieces 9 and 10 are provided with insertion pieces 18a and 19a, which are inserted into the cuts I, respectively. It is recommended that the In addition, a rectangular parallelepiped packing 20
It is advisable to provide a pleated fold Z having an arbitrary length on each of the wall surfaces forming 1, 202 in a direction intersecting the direction in which the impact force is exerted. Furthermore, the inner space of the hollow double walls 1 to 4 is used as a storage portion for small articles, and a window portion 20 for confirming the presence or absence of the small articles is provided in the hollow double wall. It is advisable to provide notches or hollows for avoiding or supporting the protrusions of the packaged article.

[0005]

[Function] During storage / transportation, the packing 201, which is expanded on one cardboard 101, 102 so as not to be bulky,
In order to fold up 202 into a packing shape, first hold both left and right sides of the corrugated board 101 and once bend both main folds A, A downward as shown in FIG.
Add a habit to make it easier to stand up. Also, the folds C, D at the boundary between the double wall forming pieces 7, 8 and the bottom piece 11A, 11B,
A crease is formed so that the fold line K of each strip-shaped reinforcing piece 12 is bent upward. Next, as shown in FIG. 3, the left and right (in FIG. 1) double wall forming pieces 7 and 8 of the corrugated board 101 are bent inwardly in a U-shape, and the folds C and D are directed upward at a right angle. When it is bent, the corrugated board 101 is bent into a gutter shape having a concave cross section. During this bending operation, as the outer wall surfaces 7a, 8a approach each other in an opposing manner and stand upright, each support piece 5 is pressed at its both ends between the double wall forming pieces 7, 8. Therefore, the cut-and-raised folds G and H are easily bent upward to stand up, and the support piece 5 in the middle of the plurality of support pieces 5 receives the bottom surface pieces 11A and 11B from below. The support pieces 5 on both outer sides are hollow double walls 3 and 4, respectively.
Forms part of the inner wall of the. Then, the double wall forming piece 7,
Each reinforcing piece 17 connected to 8 is bent inwardly at a right angle, and is directed so as to close the gutter-shaped open end surface. Finally, as shown in FIG. 4, the upper and lower double wall forming pieces 9 and 10 are bent inward in a U-shape, and the insertion pieces 18a and 19a on both sides of the narrow portions 18 and 19 are If each of the cuts I provided in the double wall forming pieces 7 and 8 is inserted, the packing 201 having the fitting recess S into which the packaged article is fitted can be folded up very easily, quickly and surely. And packing 20
When an excessive impact force is exerted on 1,202, the wall surface provided with the streak folds Z flexes elastically and effectively attenuates the excessive impact force.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. The packing 201 having a substantially rectangular parallelepiped shape, the appearance of which is shown in FIG. 5, is provided with a fitting recess S into which one surface (the upper surface in the drawing) of the packing article 300 is fitted. The four circumferences of the fitting recess S are surrounded by hollow double walls 1 to 4 having a good cushioning property, and the bottom surface of the fitting recess S is buffered by two supporting pieces 5 described later at two middle positions. Supported by. And packing 2 during storage and transportation
01 is a piece of cardboard 1 shown in FIG. 1 so as not to be bulky
The exhibition is on 01. Since the corrugated board 101 is provided with folds, cuts, and the like at a plurality of required locations, the shape and arrangement thereof will be described in detail below.

The rectangular area in the middle of the corrugated board 101 is
The back piece 6 constitutes the back surface of the packing 201. Parallel folds X for bending the vertical section into a U shape are provided on both left and right sides (the same applies in FIG. 1) of the back surface piece 6 to bend and form the hollow double walls 1, 2. Double wall forming piece 7,8
Are continuously connected via main folds A and A, respectively. Further, parallel folds Y for bending the vertical cross section into a U shape are provided on both upper and lower sides of the back surface piece 6, and the double wall forming pieces 9, 10 for forming the hollow double walls 3, 4 are formed. The main fold line B,
They are serially connected via B. Further, bottom surface pieces 11A and 11B for forming two bottom surfaces of the fitting recess S in a stacked manner are connected to the edges of the double wall forming pieces 7 and 8 via fold lines C and D.

On the back surface piece 6, a bottom surface piece 11A, 11B is supported from below, and a support piece 5 for constituting a lower portion of the inner side wall of the hollow double walls 3, 4 is erected in a raised shape. In order to be formed, a plurality of cut-and-raised cuts E and F and cut-and-raised folds G and H having a 45-degree inclined portion are provided so as to straddle both main folds A and A. In this case, three sets of cut-and-raised cuts and cut-and-raised folds are provided horizontally and vertically adjacent to each other. The cut-and-raised cut E is formed in a flat H-shape, and the two ends of the H-shaped legs located on both outer sides of both main folds A, A are separated from each other toward both main folds A by 45. Cut and raised folds G extending at an angle of inclination are provided at a total of 12 places. Then, among the eight intersection points a (see FIG. 1) at which the respective cut-and-rare folds G intersect the main fold points A and A, respectively, one set of intersection points a of the uppermost portion and the lowermost portion that face each other in the horizontal direction. , A are connected to each other to provide cut and raised folds H, H, and one pair of intersection points a,
The sections a are connected by cut and cut lines F and F, respectively. A half-cut line is provided on the back side of each of the cut-and-raised folds G and H so that the support piece 5 can be easily raised.

By providing these cut-and-raised cuts and cut-and-raised folds, the cut-and-raised cuts E and the cut-and-raised cuts that are adjacent to each other and between the cut-and-raised cuts E and the cut-and-raised cuts that are adjacent to each other are provided. A total of 16 trapezoidal support pieces 5 are formed between F (G) and F (G). Among them, on the upper side of the four support pieces 5 near the center (when raised in a cut-and-raised shape), there are recessed notches b for respectively abutting the four circumferential wall surfaces and the bottom surface forming the fitting recess S. It is provided. Further, avoid interference with the protrusion formed on the surface of the packaged article at the bottom of the recessed notch b and the upper side of the remaining two support pieces 5, or
Alternatively, a notch c is provided for supporting.

Cuts I, I are formed near the upper and lower edges of the double wall forming piece 7 and the bottom piece 1JA in order to form strip-shaped reinforcing pieces 12, 12 for reinforcing the hollow double walls 3, 4, respectively. , Is provided in parallel with the edge so as to extend from the outer parallel fold line X and reach the middle of the bottom surface piece 11A. Folds J and K are provided in the middle and the end of the strip-shaped reinforcing piece 12 in parallel with the main fold A at an interval equal to the depth of the fitting recess S. The double wall forming piece 8 is also provided with band-like reinforcing pieces 12, 12 similar to the double wall forming piece 7. When the packing 201 is folded up, each strip-shaped reinforcing piece 12 is bent downward into an L-shape by bending the fold line J downward and the fold line K upward at right angles. Then, at the time of the folding, in order to avoid that the strip-shaped reinforcing piece 12 on the bottom surface piece 11B side and the both corner portions of the bottom surface piece 11A interfere with each other, a cut L and a fold M are provided at the both corner portions, respectively. The bent piece 13 is formed by being provided. Further, a cutout 14 and a protrusion 15 corresponding to the outer shape of the packaged article are provided on the edge portion of the bottom surface piece 11A, and a cutout hole 16 is provided at one location of the bottom surface piece 11A.

The double wall forming piece 8 is provided with a Z-shaped cut N and a linear cut O at some distance, and when the packing 201 is folded up, it is packed in the peripheral wall of the fitting recess S. A dent is formed so that the projection of the part is fitted.

In the double wall forming pieces 7 and 8, the upper and lower ends of outer wall surfaces 7a and 8a which are sandwiched between the main fold line A and the inner parallel fold line X and serve as one opposing outer wall of the packing 201,
Rectangular reinforcing pieces 17 are connected to each other via folds U. Of the reinforcing pieces 17 of the four cylinders in total, the lower two reinforcing pieces 1
7, a small bent piece 17a is continuously provided at the side end via a fold line V.

Further, in the double wall forming pieces 7 and 8, in the central portion of the portions which are narrowed between the parallel folds X and X of the two lines and become the top surfaces 7b and 8b of the hollow double walls 1 and 2, Striations Z
They are provided in parallel with the parallel fold line X, respectively. In this case, the striped folds Z are formed by a well-known press working method as in the case of providing the main folds A and B and other folds. The striped folds Z have the above-mentioned top surfaces 7a, when an excessive impact force is applied to the hollow double walls 1 and 2 from the side.
It serves to elastically bend 8a to absorb the shock.

In the double wall forming pieces 9 and 10, the length of the portion outside the parallel fold line Y, that is, the portion forming one side wall of the fitting recess S is defined as the width dimension of the fitting recess S. It narrows to suit. Insertion pieces 18a and 19a for inserting into the cuts I formed in the double wall forming pieces 7 and 8 are provided on both side ends of the narrow portions 18 and 19, respectively.

Next, the operation of the above structure will be described with reference to the packing 201.
6 will be described with reference to FIG. Figure 1
A piece of corrugated cardboard that is flattened and stored like
To fold up the packing 201 from 01, first hold both the left and right sides of the corrugated board 101, and temporarily fold both main folds A, A downward as shown in FIG. 2 so that each support piece 5 can be easily raised. Add a habit. Also, the folds C, D at the boundary between the double wall forming pieces 7, 8 and the bottom piece 11A, 11B,
A crease is formed so that the fold line K of each strip-shaped reinforcing piece 12 is bent upward.

Then, as shown in FIG.
When the left and right (in FIG. 1) double wall forming pieces 7 and 8 are bent inward in a U-shape, and the folds C and D are bent upward at a right angle, the corrugated board 101 is crossed. It is bent in the shape of a concave gutter. During this bending operation, both outer wall surfaces 7a, 8
As a is approaching in an opposed manner and is standing upright, each support piece 5 is squeezed between the outer wall surfaces 7a and 8a at both ends thereof. The folds G and H are easily bent upward, and the respective support pieces 5 are naturally erected on the back surface piece 6.

In this state, the top and bottom of the back piece 6 (in FIG. 1)
As shown in FIG. 3, the support piece 5 of FIG. 3 constitutes a lower portion of the inner side wall of the hollow double walls 3 and 4, and the four support pieces 5 between the two support pieces 5 are adjacent to each other. Two pieces of the support pieces 5 overlap each other and stand up to form a stack of two pieces.
It is ready to firmly support both A and 11B from below.

Subsequently, the respective reinforcing pieces 17 connected to both ends of the outer wall surfaces 7a and 8a are bent inward at right angles, and the open end faces on both sides of the trough-shaped curved portion are covered so as to be closed. . At this time, the small bent piece 17a is bent horizontally so as to support the top surfaces of the hollow double walls 3 and 4.

Finally, as shown in FIG. 4, the double wall forming pieces 9 and 10 are bent inward in a U-shape, and the inserting pieces 18a on both sides of the narrow portions 18 and 19 are formed. If 19a is inserted into each of the cuts I provided in the double wall forming pieces 7 and 8,
Unlike the above description of the lengthy folding operation, the packing 201 is extremely easily, quickly and surely folded up.

FIG. 6 shows a case where a rectangular parallelepiped-shaped packing article 300 such as precision electric equipment is packed in a corrugated cardboard box 400 by using the two packings 201 folded in this way. In each packing 201, if the fitting recess S is fitted to both side ends of the packaged article 300 and the packaged article 300 is stored in the cardboard box 400 in this state,
The packing work can be completed very easily, quickly and surely.

In this packaged state, the packaged article 300 has the hollow double wall 1 with the four peripheral surfaces at the upper and lower sides and the front and rear sides of both end portions thereof.
2 to 4 and also has a bottom piece 11 of two laps backed by the support pieces 5 on both end faces.
A and 11B are addressed. Therefore, in combination with the good cushioning effect peculiar to the corrugated board, which is the constituent material of the packing 201, the packaging article 300 has a cardboard box 400 in a cushioning state which is not inferior to the case where the conventional polystyrene foam packing is used. Retained within.

The packing 2 having a long and thin rectangular parallelepiped shape
The hollow double walls 1 and 2 in the longitudinal direction of 01 do not have a sufficient reinforcing structure and have a longer span than the hollow double walls 3 and 4 in the width direction, so that the load supporting function or the buffering function is increased. The function is inferior. However, the top surfaces 7 of the hollow double walls 1 and 2
Since b and 8b are provided with streak folds Z as shown in FIG. 7,
When an excessive impacting force is applied to the hollow double walls 1 and 2 from the side, the top wall surfaces 7b and 8b elastically bend as shown in FIG. 8 and an excessive impact force is effective. Will be attenuated. The gaps provided between the top surfaces 7a and 8a and the top end of the support piece 5 can be changed by changing the width of the hollow double walls 1 and 2.
Since the load bearing capacity of the folds can be changed, it is possible to control the cushioning function of the folds Z. In this way, the packing 201 is further improved in its overall cushioning performance.

9 and 10 show another embodiment of the present invention. The main difference between the packing 202 of this embodiment and the packing 201 of the above embodiment is that the hollow double wall 1
4 to 4, in this embodiment, the hollow double wall 4 is used as a housing portion for housing accessory parts of the packaged article. Therefore, the double wall forming piece 10 is provided with a circular window portion 20 so that it can be easily confirmed from the outside whether or not small articles are stored in the storage portion. Further, the shapes and positions of the cuts provided on the double wall forming piece 8 are also made to correspond to the shapes and positions of the protrusions formed on the packaged article.
Further, the double wall forming piece 9 is also provided with a cut for the same purpose. Further, the small bent pieces 13 of the double wall forming pieces 7 and 8 are omitted so as not to interfere with the folding operation of the packing 202. However, the small bent piece 13 contributes to increase the structural strength of the packing 202.

In each of the above constructions, the striped folds Z are not limited to a straight line, but may be provided in a zigzag pattern or a wavy pattern, or a plurality of strips may be provided at appropriate intervals. And, the formation location is also the top surface 7a. Not limited to 8a, if the wall surface is parallel to the direction of the impact force such as the support piece 5 or the like, by providing the pleated folds Z in the direction intersecting the direction of the impact force, the cushioning effect is effectively exhibited. It In addition, packing 201, 202
Needless to say, the size of each part may be set according to the shape of the packaged article. Then, the entire packaged article may be used by being fitted into the fitting recess S of the packing.

[0025]

As is apparent from the above description, the folding corrugated cardboard packing according to the present invention has various practical advantages as listed below, as compared with the conventional styrofoam packing. . (A) It can be provided at a lower cost because it can be made by simply providing a crease or punching on one sheet of cardboard. (B) Since it can be stored and transported in a flat and compact form, storage and transportation costs are greatly reduced. (C) Contribute to waste of oil resources. (D) It occurs with the large-scale disposal of Styrofoam,
The problem of garbage disposal can be solved. (E) The cushioning performance of the packing can be remarkably improved without increasing the processing cost simply by providing the streak folds on the wall surface forming the packing in the direction intersecting with the direction in which the impact force is applied. . Further, compared with the conventional cushioning body made by stacking corrugated cardboard pieces, it is remarkably excellent in cushioning property and can be made much more efficiently and cheaply.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of the present invention in a state in which packing is developed on a single cardboard.

FIG. 2 is a perspective view showing a state where the corrugated board is started to be folded up into a packing form.

FIG. 3 is a perspective view showing a state in which a support piece 5 is substantially upright during folding.

FIG. 4 is a perspective view showing a state in which the packing is substantially folded up.

FIG. 5 is a perspective view of the packing that has been folded up.

FIG. 6 is a vertical cross-sectional view showing a state in which the packed article stored in the cardboard box is buffered and held by using two packings.

FIG. 7 is a partially enlarged vertical cross-sectional view of the state before the impact force is applied to the packing, which illustrates the action of the striped folds Z.

FIG. 8 is a partially enlarged vertical cross-sectional view of the state in which an impact force is applied to the packing, which illustrates the action of the striped folds Z.

FIG. 9 is a view corresponding to FIG. 1, showing another embodiment of the present invention.

FIG. 10 is a view equivalent to FIG.

[Explanation of symbols]

 101,102 Corrugated board 202,202 Packing 300 Packing article 400 Cardboard box 1-4 Hollow double wall 5 Support piece 6 Back piece 7-10 Double wall forming piece 7a, 8a Outer wall surface 7b, 8b Top surface 11A, 11B Bottom piece 12 band-shaped reinforcement piece 13 small bent piece 14 notch 15 protrusion 16 hollow hole 17 reinforcement piece 17a small reinforcement piece 18, 19 narrow portion 18a, 19a insertion piece 20 window portion S fitting recess Z streak fold A, B main Fold line C, D Fold line E, F Cut / cut line G, H Cut / fold line I, N, O, L Cut line J, K, M, U Fold line X, Y Parallel line a Cross point b Recessed cutout c Cutout

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] February 1, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Claims

[Correction method] Change

[Correction content]

[Claims]

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0004

[Correction method] Change

[Correction content]

[0004]

A foldable corrugated cardboard packing according to the present invention for achieving the above object is a single corrugated cardboard 1 having folds, cuts or the like at predetermined plural positions.
The packings 201 and 202 having a substantially rectangular parallelepiped outer shape with a rectangular fitting recess S into which a packaged article is fitted can be folded up simply by bending 01 and 102 along fold lines. The fitting recess S has a peripheral wall surrounded by hollow double walls 1 to 4, and a bottom surface thereof is supported by a support piece 5 formed in a cut-and-raised shape when the corrugated board is bent. . And the cardboard is 101,
Reference numeral 102 designates a back surface piece 6 serving as the back surface of the packings 201 and 202 as a main part, and parallel folds for bending and forming the hollow double walls 1 to 4 having a U-shaped cross section on four sides of the back surface piece 6. Double wall forming pieces 7 to 10 provided with X and Y are continuously provided via main folds A, A and B, B facing each other, and the bottom surface is formed on the double wall forming pieces 7 and 8. The bottom pieces 11A and 11B that are formed in a two-ply shape are connected in series through the folds C and D, respectively, and the cut I that forms the strip-shaped reinforcing piece 12 that reinforces the hollow double walls 3 and 4 is provided. A plurality of cut-and-raised cuts E and F and a main fold A for straddling the folds A and A to form the supporting piece 5 in a cut-and-raised shape.
The cut and raised folds G and H having inclined portions intersecting with each other at an angle of 45 degrees are provided, and the double wall forming pieces 9 and 10 are
The reinforcing piece 17 for reinforcing the hollow double walls 4 and 5 is folded into a fold U.
In order to fix the folded state of the packings 201 and 202, the double wall forming pieces 9 and 10 are provided with insertion pieces 18a and 19a, which are inserted into the cuts I, respectively. It is recommended that the In addition, a rectangular parallelepiped packing 20
It is advisable to provide a pleated fold Z having an arbitrary length on each of the wall surfaces forming 1, 202 in a direction intersecting the direction in which the impact force is exerted. Furthermore, the inner space of the hollow double walls 1 to 4 is used as a storage portion for small articles, and a window portion 20 for confirming the presence or absence of the small articles is provided in the hollow double wall. It is advisable to provide notches or hollows for avoiding or supporting the protrusions of the packaged article.

Claims (4)

[Claims] 1. A box-shaped fitting recess S into which a packaged article can be fitted simply by bending a piece of corrugated board 101, 102 having folds, cuts, etc. at a plurality of predetermined locations along the fold line. Packing 20 having a rectangular parallelepiped outer shape
1, 202 are folded up, and the fitting recess S is surrounded by hollow double walls 1 to 4 on its four circumferences, and its bottom surface is formed in a bent shape when the corrugated board is bent. The cardboards 101 and 102 are received and supported by the support piece 5 formed, and the packing 20
The main surface of the back piece 6 is the back surface of the back piece 1, 202, and parallel folds X and Y are formed on the four sides of the back piece 6 to bend and form the hollow double walls 1 to 4 having a U-shaped cross section. The provided double wall forming pieces 7 to 10 are provided with main folds A and A facing each other.
And B, and B, and the double wall forming pieces 7 and 8 are provided with bottom surface pieces 11A and 11B for forming the two bottom surfaces in a fold shape.
And a cutout I for forming a strip-shaped reinforcing piece 12 for reinforcing the hollow double walls 3 and 4 respectively, and straddling between the opposing main folds A and A to support the support piece 5. A plurality of cut-and-raised cuts E and F and cut-and-raised folds G and H having an inclined portion of 45 degrees are provided to the double-wall forming pieces 9 and 10 and the hollow double-wall 4 is formed. , 5
In order to fix the folded state of the packings 201 and 202, reinforcing pieces 17 for reinforcing the above are continuously provided through the folds U, and the double wall forming pieces 9 and 10 are inserted into the cuts I, respectively. A foldable corrugated cardboard packing, characterized in that it is provided with insertion pieces 18a, 19a. 2. The rectangular packings 201, 202
The fold-like folds Z having an arbitrary length are provided on each of the wall surfaces constituting the slab in a direction intersecting with the direction of the impact force.
Folding corrugated cardboard packing described in paragraph. 3. A window portion 20 for confirming whether or not the small double articles are accommodated in the inner space of the hollow double walls 1 to 4 as a housing portion for small articles.
The foldable corrugated packing made of corrugated cardboard according to claim 1 or 2, wherein is provided in the hollow double wall. 4. A notch or a cut-out hole for avoiding or receiving and supporting a protrusion of a packaged article is provided on a peripheral wall surface of the fitting recess S, according to any one of claims 1 to 3. Folding cardboard packing described in Crab.