JPH06144470A - Foldable packing of corrugated fiberboard - Google Patents

Abstract

PURPOSE:To form a foldable packing of corrugated fiberboard from a sheet of corrugated fiberboard having fold lines and cut lines, which has a quadratic prism-shape and has thereon an engaging recess for engagement with an article to be packed and which can replace a packing of polystyrene foam. CONSTITUTION:In a corrugated fiberboard, outer panels 2, 3 are connected to the opposite sides of a rectangular central panel 1 through main fold lines A, A and engagement forming panels 4, 5 each are connected to the side of each of the panels 2, 3 through fold lines, and parallel fold lines D-J are provided on each of the panels 4, 5 to form recess side faces 6, 17 and recess bottom faces 7, 18 which are a part of the engagement recess. Outer wall panels 31, 32, top panels 33, 34, and recess side panels 35, 36 are successively connected to the upper and lower edges of the panel 1 through fold lines, which are brought into contact with the outer face of the engagement recess. A plurality of cutting up cut lines 41 and cutting up fold lines 42 for forming a plurality of shock absorbing ribs 40 having U-shaped section on the panel 1 in a cut up state are provided across both the outer sides of the main fold lines.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used for packaging articles such as personal computers, printers, video tape recorders, etc. The present invention relates to a foldable corrugated cardboard packing that fits both ends of an article and buffers and supports them, and that plays a role of a conventional foamed polystyrene packing.

[0002]

2. Description of the Related Art The above-mentioned styrofoam packing is formed by casting a foaming resin material into a block body having an arbitrary three-dimensional shape with a recess for fitting a packaged article. Further, as another packing, a packing made of corrugated cardboard in which several corrugated cardboard pieces cut into an arbitrary shape are attached to each other and put together in a block body having a desired three-dimensional shape is also 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 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. Having problems, the emergence of some alternative to this is 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, an object of the present invention is to efficiently and inexpensively use corrugated board as a material, and the cushioning function is superior to conventional foamed polystyrene packing or a laminated block body of corrugated board pieces, and still, strength characteristics of the outer peripheral surface of the packaged article. There is provided a foldable corrugated packing made of corrugated cardboard that is configured so that the cushioning characteristics of the packing can also be made to differ for each part.

[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, 20 each having a substantially rectangular parallelepiped outer shape are provided with a fitting recess S having a shape capable of tightly fitting the packed article by simply bending 01, 102 along the fold line.
2 is folded up, and a plurality of cushioning ribs 40 that are brought into contact with a plurality of positions on the outer side surface of the fitting recess S are formed in a cut-and-raised shape, and the corrugated board has a center portion. A rectangular portion that occupies a part and serves as the bottom of the packing is defined as a central surface 1, and outer wall surfaces 2 and 3 serving as the left and right outer walls of the packing are provided at the left and right side ends of the central surface 1, and main folds A and A Folding lines B, which are respectively connected to each other, are formed at the respective side ends of the outer wall surfaces 2 and 3 to form the upper surface of the packing and the left and right halves of the fitting recess S, respectively. , C, respectively, for forming a concave side surface 6 which is one surface of the peripheral side surface of the fitting concave portion S and a concave bottom surface 7 which is a bottom on the fitting portion forming surface 4, respectively. The parallel folds D and E having a predetermined length are provided, and the upper and lower ends of the parallel folds D and E are provided. Is the eighth was respectively straddled, the in the fitting portion forming surface 5, the recess bottom surface 1 overlie the recess side surface 17, and the bottom surface of the recess 7 becomes one side of the peripheral surface of the fitting recessed portion S
Parallel folds I and J are formed to bend 8 respectively, and cuts 19 are provided between the upper ends and the lower ends of the parallel folds I and J, respectively. ,
Outer wall surfaces 31 and 32, which are outer walls in front of and behind the packing, are connected to each other through folds K and L, respectively.
At the upper and lower ends, the top surface 3 which is a part of the upper surface of the packing
3, 34 are connected in series via folds M, N, and recess side surfaces 35, 36, which are one of the peripheral side surfaces of the fitting recess S, are formed on the upper and lower ends of the top surfaces 33, 34, respectively. A plurality of cut-and-raised cuts for forming a plurality of double-walled cushioning ribs 40 each having a U-shaped cross section on the central surface 1 in a cut-and-raised manner. 41 and the cut-and-raised fold 42 including a slanted fold 42A inclined by 45 degrees with respect to the main fold A, provided on both outer sides of the main folds A and A. Then, at the side end of the bottom surface 7 of the recess, a reinforcing piece 13 that is overlapped with the side surface 17 of the recess to reinforce it.
Are continuously provided through the fold line H, and at the fold line H,
It is preferable to interpose the fitting cut 14 into which the cushioning rib 40 is fitted. Further, the parallel folds I and J each have a shape in which a plurality of steps are continuous, and the recess side surface 17 is formed into a plurality of steps by connecting the steps facing each other with a step 50. You may form in the curved surface which consists of a continuous step surface. Further, the fitting portion forming surface 4
In order to form a step W at the rim of the fitting recess S, parallel folds F and G having a predetermined length are provided between the parallel folds D and E, and the parallel folds D and G are provided. You may provide the break 10 which connects between each upper end and between each lower end. Alternatively, on the upper and lower ends of the outer wall surfaces 2 and 3, wall surface overlapping pieces 43 to be overlapped with the outer wall surfaces 31 and 32 are continuously provided via fold lines Q, and side wall end portions of the wall surface overlapping pieces 43 are A top surface overlapping piece 44 to be overlapped with the top surface of the packing may be continuously provided through a fold R.

[0005]

[Function] The packing 20 is placed on the cardboard 101, 102 so that it is not bulky during storage and transportation.
To fold up 1,202, first, both main folds A, A are first bent downward to give a crease. Next, when the two main folds A, A are bent upward at a right angle at this time, the respective cushioning ribs 40 compressed between the left and right outer wall surfaces 2, 3 standing upright are provided at the base thereof. Cut and raised creases 4
It is erected on the central surface 1 by the action of 2, 42A. Subsequently, when the parallel folds D and I of the fitting portion forming surfaces 4 and 5 are bent inward and the parallel folds E and J are bent outward at right angles, they are fitted inside the outer wall surfaces 2 and 3, respectively. The concave side surfaces 6 and 17 which are the left and right side surfaces of the combined concave portion S are respectively formed in a double wall shape, and the concave bottom surfaces 7 and 18 are overlapped with the upper surfaces of the standing cushioning ribs 40. Furthermore, the outer wall surfaces 31, 32, the top surfaces 33, 3 which are successively provided on the upper and lower ends of the central surface 1, respectively.
4. When the recess side surfaces 35 and 36 are bent inward at right angles, the recess side surfaces 35 and 36, which are the front and rear side surfaces of the fitting recess S, are formed inside the outer wall surfaces 31 and 32, respectively. Formed into a shape, the packing folds up easily and quickly. Then, when the reinforcing piece 13 is continuously provided at the side end of the recess bottom surface 7, the reinforcing piece 13 can be superposed on the recess side surface 17 to reinforce the side surface portion. Also, the cushioning rib 40
By the reinforcing piece 13 provided with the fitting cut 14 for fitting, the bending resistance of the cushioning rib 40 formed in a U-shaped cross section is increased. Further, if each of the parallel folds I and J is formed into a shape in which a plurality of steps are continuous and each of the facing steps is connected by a step gap 50, the concave side surface 17 is a curved surface formed by a plurality of continuous step surfaces. Can be formed. Then, the wall surface overlapping piece 43 is provided on the upper and lower ends of the outer wall surfaces 2 and 3.
Further, the structural strength of the front and rear end portions of the packing is increased by arranging the top surface overlapping pieces 44 in series.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. One cardboard 10 shown in FIG.
The packing 201 folded from 1 has a substantially rectangular parallelepiped outer shape as shown in FIG. 5, and its upper surface (in the figure).
As shown in FIGS. 7 and 8, the fitting recess S formed in
Packing article 300 In this case, the side end portion of the personal computer printer is tightly fitted and cushioned and supported. This packing 201 is expanded on one cardboard 101 during storage / transportation so that it is not bulky.

Since the corrugated board 101 is provided with folds, cuts and the like at a plurality of required locations, the shape and arrangement of these will be described in detail below. In FIG. 1, a vertically elongated rectangular section that occupies the center of the corrugated board 101 and is surrounded by folds is
At the bottom of the packing 201, this section is
I will call it. Outer wall surfaces 2 and 3 that are left and right outer walls (front and rear in FIG. 5) of the packing 201 are connected to the left and right side ends of the central surface 1 through main folds A and A, respectively.
Fitting portion forming surfaces 4 and 5 for forming the upper surface of the packing 201 and the left and right halves of the fitting concave portion S are respectively formed at the respective side ends of the outer wall surfaces 2 and 3 via folds B and C, respectively. It is connected.

In the fitting portion forming surface 4, a recess side surface 6 which is the left side surface of the peripheral side surface of the rectangular fitting recess S and a recess bottom surface 7 which is the bottom of the fitting recess S are formed by bending. of,
Parallel folds D and E having a predetermined length are provided in parallel with the main fold A. The parallel folds D and E are not provided over the entire length between the upper and lower ends (in FIG. 1) of the fitting portion forming surface 4 and are omitted near the upper and lower ends. And the parallel folds D and E
The upper and lower ends of the are connected by breaks 8 and 8, respectively. The cuts 8 and 8 are extended to the outside of the parallel fold E to some extent, and two folds are provided at predetermined intervals between each extended end and the upper end and the lower end of the fitting portion forming surface 4. The knot, the standing piece 9 formed between these two folds is the packing 201.
It is designed to stand up when the is folded up.

Further, as shown in FIG. 5, in order to form a step portion W having a predetermined length at the rim of the fitting recess S, a parallel fold F having a predetermined length is formed between the parallel folds D and E. G is provided. Then, cut lines 10 and 10 connecting the upper ends and the lower ends of the parallel folds D and F are provided. Also, the fitting recess S
A part of the side wall provided with the double wall structure is provided with a portion having a low rigidity, and the fold B and the parallel fold F are formed so that the portion of the packaged article 300 having a low strength hits the portion where the rigidity is reduced.
And a U-shaped cut 11 and a hollow 12 adjacent to the cut.

At the side end of the bottom surface 7 of the recess, a reinforcing piece 13 for connecting two side walls of the fitting recess S to each other by stacking them is reinforced by a fold H. In this reinforcing piece 13,
When the packing 201 is folded up, a cut for forming a U-shaped fitting cut 14 (see FIG. 6) for avoiding interference with a cushioning rib 40 having a U-shaped cross section described later is shown in FIG. As shown, it is provided at two places so as to intervene in the fold line H. The shock-absorbing rib 40 is fitted in the fitting cut 14 to increase the flexural strength thereof. Further, a tongue-shaped notch 15 for avoiding a knob protruding to the side surface of the printer is provided on the bottom surface 7 of the recess in contact with the fold line G, and a protection piece 16 for protecting the end surface of the knob is provided at the opposite edge of the notch 15. , 16 are provided so as to be opposed to each other through folds.

On the other hand, on the fitting portion forming surface 5, a concave side surface 17 which is a right side surface of the peripheral side surface of the fitting concave S and a concave bottom surface 18 which is superposed on the concave bottom surface 7 are formed by bending. , Parallel folds I and J having a predetermined length are provided in parallel with the main fold A. The parallel folds I and J are not provided over the entire length between the upper and lower ends of the fitting portion forming surface 5, but are omitted near the upper and lower ends. Further, the upper ends and the lower ends of the parallel folds I and J are connected by cuts 19 and 19, respectively. This cut 19 is extended to the outside of the parallel fold line J,
The respective extended ends and the upper end and the lower end of the fitting portion forming surface 5 are respectively connected by two fold lines spaced at a predetermined interval. The upright piece 20 formed between these two folds is made upright when the packing 201 is folded up. Further, on the bottom surface 18 of the concave portion, the notch 2 is provided at a position overlapping the notch 15.
1 and a hole 22 for avoiding the protrusion of the packaged article 300. Further, on the bottom surface 18 of the recess, a U-shaped cut 23 is formed so as to be interposed in the middle portion of the fold line J.
When the fold line J is bent and the fold line J is bent, the upright piece 24 surrounded by the cut line 23 is erected downward. Then, between the folds C and I, the portion serving as the upper surface of the packing 201 is provided with two buffer folds X having a predetermined length.
Are provided in parallel with these folds.

At the upper and lower ends (in FIG. 1) of the central surface 1, outer wall surfaces 31 and 32, which are the outer walls at the front and rear of the packing 201, are continuously provided via folds K and L, respectively. Outer wall surface 31, 32
At the upper and lower ends, rectangular top surfaces 33 and 34, which are front and rear end portions of the upper surface of the packing 201, are continuously provided via folds M and N, respectively. Above and below the top surfaces 33, 34,
The recess side surfaces 35 and 36, which are the front and rear side surfaces of the fitting recess S, are connected in series through folds O and P, respectively. Further, locking pieces 37 are connected to the respective side ends of the recess side surfaces 35 and 36 via folds. The width dimension of both recess side surfaces 35, 36 is narrower than that of the outer wall surfaces 31, 32. 38
Is a hole provided so as to straddle the fold line O.

As shown in FIG. 6 which is a rear view of the packing 201, a plurality of cushioning ribs 40 which are brought into contact with the outer surface of the fitting concave portion S are cut and raised on the central surface 1. Multiple cut-and-cut cuts 4 for forming upright shapes
1 and the oblique fold 42 which is inclined 45 degrees with respect to the main fold A
The cut and raised folds 42 including the portion A are provided so as to extend over both outer sides of the main folds A and A.

The cut-and-raised cuts 41 are formed in a flat H-shape as a whole as shown by writing in imaginary lines in FIG. 1. In this case, the cut-and-cut cuts 41 are provided at a total of three places at predetermined intervals. There is. Then, on both sides of each of the cut-and-raised cuts 41, horizontal folds which are formed between the main folds A and A to form the cut-and-raised folds 42 are provided at intervals of the height dimension of the buffer ribs 40. Are provided. Furthermore, the both ends of each horizontal fold and the ends of both legs of the cut-and-raised cut 41 having an H-shape are connected to each other, and the oblique fold 4 which is a part of the cut-and-raised fold 42 is formed.
2A is provided so as to be inclined 45 degrees with respect to the main fold line A.

The cushioning rib 40 has a cut-and-raised cut 41,
The partition surrounded by the cut-and-raised fold 42 adjacent to this and both main folds A, A corresponds to it. The total of six rectangular cushioning ribs 40 have trapezoidal cutting and raising auxiliary pieces 40a, 40a on both the left and right sides thereof, which are continuously connected via the main fold A, and in a standing state. In the upper part,
A recess forming notch a for forming the fitting recess S is provided. Then, by separating the adjacent cut-and-raised cuts 41, 41 from each other to some extent, each of the two adjacent cushioning ribs 40, 40 has a U-shaped cross section as shown in FIG. It will be in the form of a continuous wall.

Further, on the upper and lower ends of the outer wall forming surfaces 2 and 3, wall surface overlapping pieces 43 which are respectively overlapped with the outer wall surfaces 31 and 32 are continuously provided through folds Q. At the side end of the wall surface overlapping piece 43, a top surface overlapping piece 44 to be overlapped with the upper surface of the packing 201 is continuously provided through a fold R. Further, locking pieces 45 are connected to the side edges of the top surface overlapping pieces 44 via folds.

7 and 8 show an example of the packing 201 in use. In the packed article 300, if the fitting recesses S of the two prepared packings 201 are fitted to both ends thereof and then housed in the cardboard box 400 for packing, the two packings 201 will be Similar to the Styrofoam packing, both ends of the packaged article 300 are buffered and supported for transportation and
It surely protects the packaged article 300 from the impact exerted during handling. Note that the packing 201 is arranged vertically, not horizontally.

Next, the operation of the above configuration will be described. To fold up the packing 201 of FIG. 5 from the corrugated board 100 of FIG. 1, first hold the left and right sides of the corrugated board 100 and first
Both main folds A, A are once bent downward as shown in FIG. 2 to give a crease. Then, as shown in FIG. 3, the two main folds A and A are then bent upward at a right angle, and are pressed between the left and right outer wall surfaces 2 and 3 which are gradually raised in an opposed manner. The cushioning rib 40 is erected in a cut-and-raised state on the central surface 1 by the action of the cut-and-raised folds 42 and 42A provided on the base portion thereof.

Then, when the parallel fold D and the fold H of the fitting portion forming surface 4 are bent inward and the parallel fold E is bent outward at a right angle, the inner wall surface 2 is separated by a predetermined distance. The recess side surface 6 is formed in a double wall shape, and the recess bottom surface 7 connected to this side surface extends in the recess forming notches a of the respective upstanding cushioning ribs 40 in these recesses. It is fitted (see FIG. 4). Then, the double-walled cushioning rib 40 having a U-shaped cross section is fitted into the fitting notch 14 provided on the upright auxiliary piece 13 (see FIG. 6).

Next, when the parallel fold I of the fitting portion forming surface 5 is bent inward and the parallel fold J is bent outward at a right angle, the inside wall of the outer wall surface 3 is separated by a predetermined distance. The recess side surface 17 is formed in a double wall shape. At the same time, the upright piece 24 is bent downward so that the upright piece 24 is further along the inside of the reinforcing piece 13 that overlaps with the recess side surface 17, and the pressure resistance strength of the recess side surface 17 is further increased and at the same time The folded structure of is fixed.

Next, the wall surface overlapping pieces 43, which are respectively provided continuously at the upper and lower ends of the outer wall surfaces 2 and 3, are bent at a right angle along the fold line Q, and the front and rear side ends of the packing 201, which is shaping the shape of a rectangular parallelepiped. Address to block. Then, the top surface overlapping piece 44 connected to each of the addressed wall surface overlapping pieces 43 is bent along the fold line R, and is directed to the upper surface of the packing 201 in the process of forming, and the front and rear end portions of this upper surface are reinforced. (See FIG. 4).

Next, the outer wall surface 31 on the front side is bent inward at a right angle along the fold line K to overlap the wall surface overlapping piece 43, and the fold lines M and O are bent inward at a right angle. ,
The concave side surfaces 35 are formed in a double wall shape at a predetermined distance inside the outer wall surface 31. Then, the locking pieces 37 at both ends of the concave side surface 35 are hooked on the cuts 8 and 19, respectively, and the locking pieces 45 provided on the top surface overlapping piece 44 are hooked on the cut 10 to form the packing 201 on the front end side. The double wall structure is firmly fixed. Next, the outer wall surface 32 on the rear side is bent inward at a right angle along the fold line I to overlap the wall surface overlapping piece 43, and the fold lines N and P are bent inward at a right angle, respectively. A top surface 34 is formed at the rear end portion of the upper surface of 201, and concave side surfaces 36 are formed in a double wall shape inside the outer wall surface 32 at predetermined intervals. Then, when the respective locking pieces are hooked on the respective cuts in the same manner as described above, the double wall structure formed on the rear end side of the packing 201 is fixed.

Although the packing 201 is folded up as described above, if this series of bending operations is explained in words, it becomes very redundant, but in reality, even a first-time worker can very easily and quickly. And it can be folded surely.
In this way, it is formed on the upper surface of the packing that has been folded up,
A plurality of cushioning ribs 40 are in contact with the fitting recess for cushioning and supporting the packaged article 300 over the entire outer surface thereof, and the cushioning ribs 40 have excellent cushioning properties. Since it is made of corrugated cardboard, the packing 201 exhibits a cushioning performance comparable to that of the conventional foam polystyrene packing.

When a large impact force exceeding the expected level is exerted, the buffer ribs 40 or the outer wall surfaces of the packing 201 and the top surface portion provided with the buffer folds X are buckled and deformed. This excessive impact force is effectively attenuated, and the packaged article 300 is reliably protected. The cushioning rib 40 is
Since it is formed in a double wall shape with a U-shaped cross section, it can withstand a considerable impact force, and since its lower end surface is located slightly elevated from the bottom surface of the packing 201, the outer wall surface 2,
After the buckling deformation of 3, 31, 32 due to the impact force to damp the impact force, the cushioning rib 40 subsequently receives the impact force, and exhibits a two-stage cushioning function.
Further, if the portion of the packaged article 300 having poor strength is made to face the hole (see FIG. 5) formed behind the U-shaped cut 12 provided on the side surface 6 of the concave portion, this insufficient strength portion is formed into the concave portion. The side surface 6 can be brought into sufficient abutment with a cushion.

9 to 15 show the packing 20 of the second embodiment.
2 is shown. The main difference from the packing 201 of the first embodiment is the shape of the recess side surface 17. That is, the fitting recess S formed on the upper surface of the packing 202 shown in FIG.
The concave side surface 17 forming a part of the peripheral wall is formed into a curved surface so that the concave side surface 17 can be brought into close contact with the curved side surface of the packaged article 300. Therefore, the parallel folds I and J provided on the corrugated cardboard 102 (FIG. 9) for folding the packing 202 each have a plurality of steps (six steps in this case), and these folds have an arc shape as a whole. I am trying to make it. Then, a plurality of (five) step gaps 50 connecting the parallel folds I and J facing each other are provided. 51
Is for avoiding protrusions of packing articles, and packing 2
This is a hollow hole that is useful for hanging your finger when folding 02 and unfolding.

In the above structure, the shape of the fitting recess S can be variously changed according to the outer shape of the packaged article 300. Further, the formation position, the number, the shape, etc. of the cushioning ribs 40 may be appropriately selected so as to obtain the best cushioning effect for various packaged articles, and the dimensions of each part of the packing 201, 202. Of course, the packaging article 300
It should be decided so as to fit the outer shape of. Alternatively, the packaged article may be completely fitted into the fitting recess S.

[0027]

As is clear from the above description, the folding corrugated cardboard packing according to the present invention exhibits various practical advantages as listed below, as compared with the conventional foam polystyrene 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) Then, by appropriately changing the position, the number, the shape, etc. of the cushioning ribs, or by forming the cushioning ribs into a double wall structure with a U-shaped cross section, the cushioning characteristics of the packing can be improved. It can be varied to best suit the individual packaged item. (F) Since a stepped portion can be provided at the rim of the fitting recess and the side surface of the recess can be formed into a curved surface, even packed articles of various irregular shapes can be tightly fitted in the fitting recess without looseness. It is possible to fit the above-mentioned to each other, and a sufficiently high cushioning effect can be obtained. (G) By making the outer wall surface and the side surface of the concave portion side by side with two corrugated cardboards overlapping,
It is possible to give the packing a required pressure resistance.
Further, compared with the packing made by stacking the conventional corrugated cardboard pieces, the cushioning performance is remarkably excellent, and the packing can be made much more efficiently and cheaply.

[Brief description of drawings]

FIG. 1 shows a first embodiment of the present invention, and is a plan view showing a state in which packing is developed on one 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 cushioning ribs are erected during folding up.

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 rear perspective view of the packing that has been folded up.

FIG. 7 is a vertical cross-sectional side view showing a state in which the packed article is packed using two packings and a cardboard box.

FIG. 8 is a partial vertical sectional front view showing a state in which the packed article is packed using two packings and a cardboard box.

FIG. 9 is a view, corresponding to FIG. 1, showing a second embodiment.

FIG. 10 is a view corresponding to FIG.

FIG. 11 is a view equivalent to FIG.

FIG. 12 is a perspective view showing a state in the middle of folding the same as above.

FIG. 13 is a diagram corresponding to FIG.

FIG. 14 is a view equivalent to FIG.

FIG. 15 is a vertical sectional front view showing a state in which the packed article is packed using two packings and a cardboard box.

[Explanation of symbols]

 101, 102 Corrugated board 201, 202 Packing 300 Packing article 400 Corrugated board box S Fitting recess W W step portion X Buffer fold 1 Center surface 2,3 Outer wall surface 6,17,35,36 Recess side surface 7,18 Recess bottom surface 8,10 , 15,19 Cut 9,20,24 Standing piece 11 C-shaped cut 12,22,38 Opening hole 13 Reinforcement piece 14 Fitting cut 16 Protective piece 21 Cutout 23 C-shaped cut 31,32 Outer wall surface 33,34 Top surface 37 Locking piece 40 Buffer rib 40a Cutting and raising auxiliary piece 41 Cutting and raising cut 42, 42A Cutting and folding fold 43 Wall surface overlapping piece 44 Top surface overlapping piece 45 Locking piece 50 Step gap A Main fold D to J Parallel cut B, C, K to Ra Ra Notch forming notch

Claims (5)

[Claims] 1. A fitting recess S having a shape capable of tightly fitting a packaged article only by bending a piece of corrugated board 101, 102 having folds, cuts, etc. at predetermined plural locations along the fold. The packings 201 and 202 having an outer shape of a substantially rectangular parallelepiped, which are provided on the upper surface thereof, are folded up, and a plurality of cushioning ribs 40 abutting on a plurality of locations on the outer surface of the fitting recess S are formed in a cut-and-raised shape. In the corrugated cardboard, a rectangular portion that occupies the central portion of the cardboard and serves as the bottom of the packing is defined as a central surface 1, and the left and right side edges of the central surface 1 are arranged on the left and right sides of the packing. Outer wall surfaces 2 and 3 serving as outer walls are respectively provided continuously via main folds A and A, and the upper surface of the packing and the left and right half halves of the fitting recess S are provided at respective side ends of the outer wall surfaces 2 and 3. The creases B and C on the mating portion forming surfaces 4 and 5 for forming the respective portions. The recessed portion side surface 6 which is one surface of the peripheral side surface of the fitting recessed portion S and the recessed portion bottom surface 7 which is the bottom are bent and formed on the fitting portion forming surface 4 respectively. The lengthwise parallel folds D and E are provided, and the cuts 8 are provided between the upper ends and the lower ends of the parallel folds D and E, respectively. Parallel folds I and J for bending and forming a concave side surface 17 that is one surface of the peripheral side surface and a concave bottom surface 18 that overlaps the concave bottom surface 7 are provided, and between the upper ends and the lower ends of the parallel folds I and J. Interstituting cuts 19 between them, outer wall surfaces 31 and 32, which are outer walls in front of and behind the packing, are connected to the upper and lower ends of the central surface 1 through folds K and L, respectively. At the upper and lower ends of 31, 32, top surfaces 33, 34 which are a part of the upper surface of the packing are provided. Folding side surfaces 35 and 36, which are one of the peripheral side surfaces of the fitting recess S, are formed on the upper and lower ends of the top surfaces 33 and 34, respectively.
Further, a plurality of cut-and-raised cuts for forming a plurality of double-walled cushioning ribs 40 having a U-shaped cross section in a cut-and-raised shape on the central surface 1 respectively. 41 and 45 for the main fold A
A folding corrugated cardboard packing, characterized in that it has a form in which cut and raised folds 42 including inclined folds 42A are provided on both outer sides of the main folds A, A. 2. The side edge of the bottom surface 7 of the recess is provided with a reinforcing piece 13 which is overlapped with and reinforces the side surface 17 of the recess through a fold H, and the fold H has the cushioning rib 40. The foldable corrugated packing made of corrugated board according to claim 1, characterized in that a fitting cut (14) for fitting the above is interposed. 3. The parallel side folds I and J have a shape in which a plurality of steps are continuous, in order to form the concave side surface 17 into a curved surface formed by a plurality of steps having a series of steps. The folding corrugated cardboard packing according to claim 1 or 2, wherein the steps 50 facing each other are connected by a step 50. 4. The fitting fold forming surface 4 is provided with parallel folds F, G of a predetermined length and parallel folds D, G in order to form a step W at the rim of the fitting recess S. The foldable corrugated cardboard packing according to any one of claims 1 to 3, wherein the fold-type corrugated packing is provided between E, and cuts 10 are provided to connect the upper ends and the lower ends of the parallel folds D and G, respectively. . 5. The upper and lower ends of the outer wall surfaces (2, 3) are provided with wall surface overlapping pieces (43) to be overlapped with the outer wall surfaces (31, 32) through folds (Q), respectively, and side ends of the wall surface overlapping pieces (43). Has
5. A top surface overlapping piece 44 to be overlapped with the top surface of the packing is continuously provided via a fold line R. 5.
A foldable cardboard packing according to any one of 1.