JP2646175B2 - Foldable cardboard packing - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method for packing articles extremely sensitive to an impact force, such as a personal computer, a printer or a video tape recorder, in a cardboard box. The present invention relates to a foldable corrugated cardboard packing which plays a role in place of a conventional styrofoam packing, in which both ends of an article are fitted and cushioned and supported.

[0002]

2. Description of the Related Art The above-mentioned packing made of styrofoam is formed into an arbitrary three-dimensional block having a concave portion for fitting a packaged article by casting a foamable resin material. Further, as another packing, a packing made of corrugated cardboard, which is obtained by bonding several pieces of corrugated cardboard cut into an arbitrary shape to form a block having a desired three-dimensional shape, is also used.

[0003]

However, since styrofoam is made from petroleum, which is a finite natural resource, it should be avoided as much as possible to use it as a packaging material, which is discarded as it is for a single transportation purpose. desirable. Also, from the viewpoint of measures to dispose of municipal garbage, which is becoming more and more serious, styrofoam is bulky and expensive to transport, is not suitable for landfill, and if burned, generates high temperatures and damages the incinerator. Given the problem, the emergence of some alternatives is desired. On the other hand, the cardboard pieces are preferably made because they are made of reproducible wood, the recycled paper is easy, and the disposal problem is far less than that of Styrofoam. The work requires a lot of labor and is disadvantageous in cost, and the buffer function is insufficient. Therefore, an object of the present invention is to efficiently and inexpensively make corrugated cardboard as a material, and also have a superior cushioning function as compared with a conventional styrofoam packing and a laminated block body of corrugated cardboard pieces. Accordingly, it is an object of the present invention to provide a foldable corrugated cardboard packing configured such that the cushioning characteristics of the packing are made different for each part in correspondence with the difference between the parts.

[0004]

SUMMARY OF THE INVENTION In order to achieve the above object, a folding cardboard packing according to the present invention comprises a single throwing ball 1 provided with folds and cuts at a plurality of predetermined positions.
The packings 201, 20 each having a substantially rectangular parallelepiped outer shape are provided on the upper surface with fitting recesses S having a shape capable of tightly fitting the packaged articles simply by bending the first and second folds along the folds.
2 is raised, and a plurality of cushioning ribs 40 are formed in a cut-and-raised shape in contact with a plurality of locations on the outer surface of the fitting concave portion S. A rectangular portion occupying the bottom and serving as the bottom of the packing is defined as a center plane 1. Outer wall surfaces 2 and 3 serving as left and right outer walls of the packing are formed on left and right side edges of the center plane 1, The fitting portion forming surfaces 4 and 5 for forming the upper surface of the packing and the left and right halves of the fitting concave portion S are formed on the respective side ends of the outer wall surfaces 2 and 3 respectively. , C, respectively, to form a concave side surface 6 as one surface of the peripheral side surface of the fitting concave portion S and a concave bottom surface 7 as the bottom on the fitting portion forming surface 4. The parallel folds D and E having a shorter length than the main fold A are provided in parallel with the main fold A, and Cuts 8 are provided between both ends of the row folds D and E, respectively, and the fitting portion forming surface 5 is provided with a concave side surface 17 which is one of the peripheral side surfaces of the fitting concave portion S, and on the concave bottom surface 7. Parallel folds I and J are formed to bend the bottom surfaces 18 of the concave portions that are to be overlapped, respectively, and cuts 19 are provided between both ends of the parallel folds I and J, respectively. Is provided with outer wall surfaces 31 and 32 which are front and rear outer walls of the packing via folds K and L, respectively,
Top surfaces 33, 34, which are part of the upper surface of the packing, are connected to upper and lower ends of the outer wall surfaces 31, 32 via folds M, N, respectively. The concave side surfaces 35, 3 which are each one of the peripheral side surfaces of the fitting concave portion S,
6 are connected to each other via folds O and P, and a plurality of buffer ribs 40 having a double-walled U-shaped cross section are formed on the central surface 1 in a cut-and-raised manner. A plurality of cut-and-raised cuts 42 that join a plurality of cut-and-raised cuts 41 and oblique folds 42A that are inclined 45 degrees with respect to the main folds A are combined with the main folds A,
A is provided over both sides of A. And
At the side end of the bottom surface 7 of the concave portion, a reinforcing piece 13 that is superimposed on the side surface 17 of the concave portion to reinforce is provided continuously through a cut H, and the buffer rib 40 is fitted to the fold H. It is preferable to interpose a cut 14 for fitting. Further, in order to form the concave side surface 17 into a curved surface formed by connecting a plurality of step surfaces, the parallel folds I and J have a shape in which a plurality of step portions are respectively connected and face each other. It is preferable to connect the steps with a step break 50. Further, the fitting portion forming surface 4 has a stepped portion W at the edge of the fitting concave portion S.
Is formed so as to straddle both sides of the parallel fold D,
Three parallel folds F, F, and G shorter than this fold are provided, and the place where the parallel fold is formed lacks the parallel fold D, and between the upper ends and lower ends of the parallel folds F, F, G. Is preferably provided. Alternatively, on the upper and lower ends of the outer wall surfaces 2 and 3, a wall overlap piece 43 to be overlapped with the outer wall surfaces 31 and 32 is continuously provided via a fold Q. The top surface superposed piece 44 to be superimposed on the top surface of the packing is creased R
It is better to connect them via

[0005]

In the storage / transportation, the packing 20 is changed from the state of being spread on one piece of cardboard 101, 102 so as not to be bulky.
In order to fold 1,202, first, both main folds A, A are once bent downward to give a folding habit. Next, when both main folds A, A are bent upward at a right angle, each of the buffer ribs 40 pressed between the left and right outer wall surfaces 2, 3 which are opposed to each other is provided at the base thereof. Crease for fold 4
It stands 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, the insides of the outer wall surfaces 2 and 3 are fitted. The concave side surfaces 6 and 17 serving as left and right side surfaces of the joint concave portion S are formed in a double wall shape, respectively, and the concave bottom surfaces 7 and 18 are addressed to the upper surfaces of the upstanding buffer ribs 40 in a superposed state. Further, outer wall surfaces 31 and 32 and top surfaces 33 and 3 are sequentially provided on the upper and lower ends of the central surface 1, respectively.
4. When the concave side surfaces 35 and 36 are bent inward at right angles, respectively, the concave side surfaces 35 and 36 which are the front and rear side surfaces of the fitting concave portion S are provided inside the outer wall surfaces 31 and 32, respectively. The packing is easily and quickly folded up. When the reinforcing pieces 13 are continuously provided on the side edges of the bottom surface 7 of the concave portion, the reinforcing pieces 13 can be superposed on the side surface 17 of the concave portion to reinforce this side portion. Also, the buffer rib 40
The bending resistance of the cushioning rib 40 formed in a U-shape in cross section is enhanced by the reinforcing piece 13 provided with the notch 14 for fitting which fits the groove. Further, 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 opposing steps is connected by a step break 50, so that the concave side surface 17 is a curved surface formed by a continuation of a plurality of step surfaces. Can be formed. Then, the upper and lower ends of the outer wall surfaces 2 and 3 are provided with a wall surface overlapping piece 43.
In addition, the structural strength of the front and rear end portions of the packing is increased by continuously connecting the top surface overlapping pieces 44.

[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 up from 1 has a substantially rectangular parallelepiped outer shape as shown in FIG.
As shown in FIGS. 7 and 8,
In this case, the packaged article 300 is configured so that the side end of the printer for a personal computer is tightly fitted and buffer-supported. The packing 201 is spread on one piece of corrugated cardboard 101 during storage and transportation so as not to be bulky.

The corrugated cardboard 101 is provided with folds and cuts at a plurality of required positions. The shapes and arrangements thereof will be described in detail below. In FIG. 1, a vertically long rectangular section occupying the center of the cardboard 101 and surrounded by folds is
At the bottom of the packing 201, this section is
I will call it. Outer wall surfaces 2 and 3 serving as left and right (front and rear in FIG. 5) outer walls of the packing 201 are connected to the left and right side ends of the central surface 1 via 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 formed on the respective side ends of the outer wall surfaces 2 and 3 via folds B and C, respectively. It is connected continuously.

On the fitting portion forming surface 4, a concave side surface 6 serving as a left side surface of the peripheral side surface of the rectangular parallelepiped fitting concave portion S and a concave bottom surface 7 serving as a bottom of the fitting concave portion S are formed by bending. Are provided in parallel with the main fold A.
The parallel folds D and E are shorter than the main fold A,
The upper and lower portions (in FIG. 1) of the fitting portion forming surface 4 are not provided near both ends. And between the upper and lower ends of the parallel folds D and E,
They are tied at breaks 8, 8, respectively. Between the cut 8 slightly extended outside the parallel fold E and the upper and lower ends of the fitting portion forming surface 4, two folds provided at predetermined intervals are provided, respectively, and between these folds. The formed standing piece 9 is made to stand when the packing 201 is folded up.

Further, as shown in FIG. 5, in order to form a step portion W of a predetermined length at the edge portion of the fitting concave portion S, the step portion W is straddled on both sides of the parallel fold D. Three parallel folds F, F and G which are short by a predetermined length are provided. Further, cuts 10 connecting the upper ends and the lower ends of the parallel folds F and G are provided. Further, in order to provide a part with reduced rigidity in a part of the side wall having the double wall structure of the fitting concave portion S, between the fold B and the parallel fold F, a U-shaped cut 11 and an adjacent portion thereof are provided. Hole 12
Is provided. Then, the portion where the strength of the packaged article 300 is inferior hits the location where the rigidity is reduced.

At the side end of the bottom surface 7 of the concave portion, a reinforcing piece 13 for reinforcing a part of the side wall of the concave portion S for fitting is provided via a fold line H in order to reinforce it. In this reinforcing piece 13,
FIG. 1 shows a cutout for forming a U-shaped fitting cut 14 (see FIG. 6) which avoids interference with a buffer rib 40 having a U-shaped cross section when the packing 201 is folded up. As shown, it is provided at two places so as to be interposed between the folds H. The cushioning ribs 40 can be fitted in the fitting cuts 14 to increase their bending resistance. A tongue-shaped notch 15 is provided on the bottom surface 7 of the recess so as to avoid a knob protruding from the side surface of the printer, in contact with the fold G. , 16 are provided so as to face each other with folds therebetween.

On the other hand, on the fitting portion forming surface 5, a concave side surface 17, which is the right side surface of the peripheral side surface of the fitting concave portion S, and a concave bottom surface 18 overlapped with the concave bottom surface 7 are formed by bending. The 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. The upper folds and the lower ends of the parallel folds I and J are connected by cuts 19 and 19, respectively. This cut 19 extends somewhat outside the parallel fold 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 folds separated by a predetermined distance. The upright pieces 20 formed between the two folds are made to stand when the packing 201 is folded up. Further, a notch 2 is formed on the bottom surface 18 of the concave portion at a position overlapping the notch 15.
1 and a hollow hole 22 for avoiding the protrusion of the packaged article 300. In the bottom 18 of the concave portion, a U-shaped cut 23 is formed so as to be interposed in the middle of the fold J.
Is provided, and when the fold J is bent, the standing pieces 24 surrounded by the cuts 23 are erected downward. A portion of the packing 201 sandwiched between the folds C and I is provided with two cushion folds X of 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 front and rear outer walls of the packing 201, are continuously provided via folds K and L, respectively. Outer walls 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. At the top and bottom of the top faces 33, 34,
Recess side surfaces 35 and 36 which are front and rear side surfaces of the fitting concave portion S are continuously provided via fold lines O and P, respectively. In addition, locking pieces 37 are connected to the respective side ends of the concave side surfaces 35 and 36 via fold lines. The width dimension of the two concave side surfaces 35 and 36 is smaller than that of the outer wall surfaces 31 and 32. 38
Is a hollow hole provided over the fold line O.

As shown in FIG. 6 as a rear view of the packing 201, a plurality of cushioning ribs 40 are provided on the central surface 1 so as to abut on a plurality of locations on the outer surface of the fitting recess S. Cuts and raised cuts 4 to form uprights
1, and the oblique fold 42 inclined 45 degrees with respect to the main fold A
The cut-and-raised fold 42 including the portion A is provided so as to straddle both outer sides of the main folds A and A.

The cut-and-raised cuts 41 are formed as a whole in a flat H-shape as shown by imaginary lines in FIG. 1, and in this case, the cuts and cuts 41 are provided at a total of three places at predetermined intervals. I have. Then, on both sides of each of the cut-and-raised cuts 41, horizontal folds that form the cut-and-raised folds 42 by straddling between the main folds A and A are separated by an interval corresponding to the height dimension of the buffer rib 40. Provided. Further, by connecting both ends of each horizontal fold and each end of both legs of the H-shaped cut-and-raised cut 41, a diagonal fold 4 which becomes a part of the cut-and-raised fold 42
2A is provided at an angle of 45 degrees with respect to the main fold A.

The cushioning rib 40 has a cut-and-raised cut 41,
The section enclosed between the cut-and-raised fold 42 adjacent thereto and the two main folds A, A corresponds to this. A total of six rectangular cushioning ribs 40 have trapezoidal cutting and raising auxiliary pieces 40a, 40a on both left and right sides thereof connected via a main fold A, and are in an upright state. In the upper part,
A recess forming notch a for forming the fitting recess S is provided. Then, by slightly separating the adjacent cut-and-raised cuts 41, 41, the two adjacent buffer ribs 40, 40 have a U-shaped cross section as shown in FIG. It will be in a form of a heavy wall.

Further, on the upper and lower ends of the outer wall forming surfaces 2 and 3, a wall surface overlapping piece 43 to be superposed on the outer wall surfaces 31 and 32, respectively, is continuously provided via a fold Q. On the side end of the wall surface overlapping piece 43, a top surface overlapping piece 44 to be overlapped on the upper surface of the packing 201 is continuously provided via a fold R. Further, a locking piece 45 is connected to a side end of the top surface overlapping piece 44 via a fold line.

FIGS. 7 and 8 show an example of how the packing 201 is used. In the packing article 300, the fittings S of each of the two packings 201 prepared are fitted to both ends thereof, and the packings are placed in a cardboard box 400 for packing. Similar to the Styrofoam packing, both ends of the packaged article 300 are buffered and supported for transportation and transportation.
It reliably protects the packaged article 300 from the impact exerted during handling. The packing 201 is arranged not vertically but vertically.

Next, the operation of the above configuration will be described. In order to fold the packing 201 of FIG. 5 from the cardboard 100 of FIG. 1, hold the left and right sides of the cardboard 100 first.
The two main folds A, A are once bent downward as shown in FIG. Next, when the main folds A and A are bent upward at right angles as shown in FIG. 3, each of the main folds A and A is compressed between the left and right outer wall surfaces 2 and 3 which are gradually erected in opposition. The buffer ribs 40 are raised on the central surface 1 by the cut and raised folds 42 and 42A provided at the base thereof.

Therefore, when the parallel folds D and H are bent inward and the parallel folds E are bent outward at right angles, the fitting portion forming surface 4 is spaced inside the outer wall surface 2 at a predetermined interval. Thus, the concave side surface 6 is formed in a double wall shape, and the concave bottom surface 7 connected to this side surface is straddled between the concave forming notches a of the upstanding buffer ribs 40 and is inserted into these notches. It is fitted (see FIG. 4). Then, a buffer rib 40 having a double-walled U-shaped cross section is fitted into the fitting notch 14 provided in the upstanding auxiliary piece 13 (see FIG. 6).

Next, when the parallel fold I is bent inward and the parallel fold J is bent outward at right angles, the fitting portion forming surface 5 is spaced inside the outer wall 3 at a predetermined interval. The concave side surface 17 is formed in a double wall shape. At the same time, the standing piece 24 is bent downward to be further along the inside of the reinforcing piece 13 overlapping the concave side surface 17, and the pressure resistance strength of the concave side surface 17 portion is further increased, and this portion is further improved. Is fixed.

Next, each of the overlapped wall pieces 43 provided at the upper and lower ends of the outer wall surfaces 2 and 3 is bent at a right angle along the fold line Q to form a rectangular parallelepiped. To block off. Then, the top surface overlapping piece 44 connected to each of the wall surface overlapping pieces 43 addressed is bent along the fold line R, and addressed to the upper surface of the packing 201 being formed to reinforce both front and rear ends of this upper surface. (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 and overlaps the wall surface overlapping piece 43. Further, the folds M and O are bent at an inward right angle, respectively. ,
The concave side surface 35 is formed in a double wall shape at a predetermined interval inside the outer wall surface 31. Then, the locking pieces 37 on both side ends of the concave side surface 35 are hooked on the cuts 8 and 19, respectively, and the locking piece 45 provided on the top surface overlapping piece 44 is hooked on the cut 10, thereby forming the packing 201 on the front end side. 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 I and overlaps the wall surface overlapping piece 43, and further, the folds N and P are bent at an inward right angle, respectively. A top surface 34 is formed at the rear end portion of the upper surface of 201, and a concave side surface 36 is formed inside the outer wall surface 32 at a predetermined interval in a double wall shape. Then, when the respective locking pieces are hooked to 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.

As described above, the packing 201 is folded up. However, if this series of bending operations is described in words, it must be extremely redundant. And it can be folded up reliably.
It is formed on the upper surface of the packing folded up in this way,
A plurality of buffering ribs 40 are in contact with the fitting concave portion that buffers and supports the packaged article 300 over the entire outer surface thereof, and the buffering rib 40 has excellent buffering properties. Since it is made of corrugated cardboard, the packing 201 exhibits a cushioning performance not inferior to that of the conventional packing made of polystyrene.

When a large impact force exceeding an assumed level is applied, the cushioning rib 40, the outer wall surfaces of the packing 201, and the top surface portion provided with the cushioning fold X are buckled and deformed. This excessive impact force is effectively attenuated, and the package article 300 is reliably protected. The buffer rib 40
Since it is formed in the shape of a double wall having a U-shaped cross section, it can withstand a considerable impact force, and its lower end surface is slightly raised from the bottom surface of the packing 201.
The cushioning ribs 40 exhibit a two-stage cushioning function such that the cushioning ribs 40 receive the impacting force after the members 3, 31, and 32 buckle and reduce the impacting force due to the impacting force.
In addition, if the portion of the packing article 300 where the strength is inferior is made to face the hollow portion (see FIG. 5) formed behind the U-shaped cut 12 provided on the side surface 6 of the recess, the portion where the strength is insufficient can be replaced with the recess. The side surface 6 can be sufficiently abutted against the side surface 6.

FIGS. 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 lies in the shape of the concave side surface 17. That is, the fitting recess S formed on the upper surface of the packing 202 shown in FIG.
The curved side surface 17 of the concave portion forming a part of the peripheral wall is formed so as to be in 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 are provided with a plurality of steps (in this case, six steps), and these folds are formed in an arcuate shape as a whole. Is made. Further, a plurality of (five) step gaps 50 are provided that connect the step portions of the parallel folds I and J that face each other. 51
Is to avoid the protrusion of the packing article and packing 2
This is a hollow hole that is useful for hooking a finger during the operation of folding and unfolding 02.

In the above configuration, 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, and the like of the cushioning ribs 40 may be appropriately selected so as to obtain the best cushioning effect for various packing articles. Of course, the packaged article 300
May be determined so as to conform to the external shape of. Alternatively, a method of completely fitting the packaged article into the fitting recess S may be used.

[0027]

As is clear from the above description, the folding type cardboard packing according to the present invention has various practical effects as listed below as compared with the conventional styrofoam packing. . (A) Since it can be made only by forming a fold or punching one cardboard, it can be provided at a lower cost. (B) Since storage and transportation can be performed in a compact form developed flat, storage and transportation costs are greatly reduced. (C) Contribute to waste of petroleum resources. (D) resulting from mass disposal of styrofoam;
The problem of garbage disposal can be solved. (E) The position, number, shape, etc., of the buffer ribs are appropriately changed, or the buffer ribs have a double-walled U-shaped cross section, so that the cushioning characteristics of the packing are improved. It can be varied to best suit individual packaging items. (F) Since a stepped portion can be provided at the edge of the fitting recess or the side surface of the recess can be formed as a curved surface, even packing articles having various irregular shapes can be tightly closed in the fitting recess without play. And a sufficiently high buffer effect can be obtained. (G) By making important points on the outer wall surface and the side surface of the concave portion two superposed cardboards, less material is required.
The required pressure resistance can be imparted to the packing.
In addition, compared with the packing made by stacking the conventional cardboard pieces, the cushioning performance is remarkably excellent, and it can be made much more efficiently and inexpensively.

[Brief description of the drawings]

FIG. 1 shows a first embodiment of the present invention, and is a plan view showing a state in which packing is developed into one piece of cardboard.

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

FIG. 3 is a perspective view showing a state in which a buffer rib is erected during folding up;

FIG. 4 is a perspective view showing a state where the packing is substantially folded up;

FIG. 5 is a perspective view of the folded packing according to the first embodiment.

FIG. 6 is a rear perspective view of the packing which has been folded up.

FIG. 7 is a vertical sectional side view showing a state in which the packaged article is packed using two packings and a cardboard box according to the first embodiment.

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

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

FIG. 10 is a diagram corresponding to FIG. 2;

FIG. 11 is a diagram corresponding to FIG. 3;

FIG. 12 is a perspective view showing a state in which folding is being performed;

FIG. 13 is a diagram corresponding to FIG. 4;

FIG. 14 is a diagram corresponding to FIG. 5;

FIG. 15 is a vertical sectional front view showing a state where the packing article is packed by using two packings and a cardboard box according to the embodiment.

[Explanation of symbols]

 101, 102 Corrugated cardboard 201, 202 Packing 300 Packing article 400 Corrugated cardboard box S Fitting concave part W Stepped part X Buffer fold 1 Central surface 2, 3 Outer wall surface 6, 17, 35, 36 Concave side surface 7, 18 Concave bottom surface 8, 10 , 15,19 cut 9,20,24 Standing piece 11 U-shaped cut 12,22,38 Boring hole 13 Reinforcement piece 14 Fitting cut 16 Protective piece 21 Notch 23 U-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 break 42, 42A Cutting and raising fold 43 Wall overlapping piece 44 Top surface overlapping piece 45 Locking piece 50 Step gap 51 Cutout hole A Main fold D to J Parallel cut B, C, K-Ra concave notch formation

Claims (5)

(57) [Claims] 1. A fitting recess S having a shape capable of tightly fitting a packaged article only by folding one piece of corrugated cardboard 101, 102 having folds or cuts at predetermined plural places along a fold. The packings 201 and 202 having a substantially rectangular parallelepiped outer shape provided on the upper surface thereof are folded up, and a plurality of buffer ribs 40 which are in contact with a plurality of positions on the outer surface of the fitting recess S are formed in a cut-and-raised shape. The cardboard occupies a central portion, and a rectangular portion serving as a bottom of the packing is defined as a center plane 1, and left and right side walls of the packing are provided on left and right side edges of the center plane 1. Outer wall surfaces 2 and 3 are connected to each other through main folds A and A, respectively, and at each side end of the outer wall surfaces 2 and 3, each of the left and right halves of the upper surface of the packing and the fitting concave portion S Are formed via the fold lines B and C The fitting portion forming surface 4 has a concave side surface 6 serving as one surface of a peripheral side surface of the fitting concave portion S and a concave bottom surface 7 serving as a bottom. Parallel folds D and E having a shorter length than the main fold A are provided in parallel with the main fold A,
A notch 8 is provided between both ends of each of the parallel folds D and E. On the fitting portion forming surface 5, a concave side surface 17 which is one surface of a peripheral side surface of the fitting concave portion S, and the concave bottom surface 7. Parallel folds I and J are formed for bending the bottom surface 18 of the concave portion to be superimposed thereon, and cuts 19 are provided between both ends of the parallel folds I and J, respectively. , Outer wall surfaces 31 and 32 which are front and rear outer walls of the packing are connected to each other via folds K and L, and upper and lower ends of the outer wall surfaces 31 and 32 are respectively provided with a part of the upper surface of the packing. The top surfaces 33 and 34 are continuously provided via folds M and N, respectively, and concave side surfaces 35 and 36 which are one surface of the peripheral side surface of the fitting concave portion S are provided on the upper and lower ends of the top surfaces 33 and 34, respectively. Crease O,
And a plurality of cut-and-raised cuts for forming a plurality of cut-and-raised cut-off ribs 40 having a double-walled U-shaped cross section on the central surface 1. 41 and 45 for the main fold A
A folding corrugated cardboard leg packing characterized in that a cut-and-raised fold 42 including a slanted fold 42A is provided so as to extend over both outer sides of the main folds A, A. 2. A reinforcing piece 13 which is superimposed on the side surface 17 of the concave portion and is reinforced is provided at a side end of the bottom surface 7 of the concave portion via a fold H. The fold H is provided with the buffer rib. 2. The foldable cardboard packing according to claim 1, wherein a fitting notch for fitting the fitting is interposed. 3. The parallel fold I.D. in order to form the concave side surface 17 into a curved surface formed by connecting a plurality of steps of the throwing surfaces. 3. The folding type corrugated cardboard according to claim 1, wherein J has a shape in which a plurality of steps are connected to each other, and each of the steps facing each other is connected by a step gap 50. Packing. 4. A fitting recess S is formed on the fitting portion forming surface 4.
Parallel fold D to form a stepped portion W at the edge of
, And three parallel folds F, F, and G shorter than the fold are provided, and the place where the parallel fold is formed lacks the parallel fold D, and the parallel folds F, F, Break 1 connecting the upper and lower ends of G
4. The foldable cardboard packing according to claim 1, wherein 0 is provided. 5. An upper surface and a lower end of the outer wall surfaces 2, 3 are provided with a wall surface overlapping piece 43 to be superimposed on the outer wall surfaces 31, 32 via a fold Q, respectively. In
5. A top surface overlapping piece 44 to be superimposed on the top surface of the packing is provided continuously through a fold line R.
The foldable cardboard packing according to any one of the above.