JP2017100801A - Sheet for corrugated carton, corrugated carton - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to firmly maintain a closed state of a bottom without use of an adhesive tape, a metal fitting or the like.SOLUTION: A sheet for a corrugated carton comprises: four side plates 21 to 24 and one flap plate 25, and four top surface lid boards 31 to 34 and four bottom face lid boards 41 to 44. The bottom face lid boards 41 to 44 has lap parts 410, 430, a plug part 411, a plug reception part 431, insertion reception parts 414, 433, and insertion parts 421, 441. The lap parts 410, 430 are overlapped on each other, the plug part 411 is inserted in the plug reception part 431, and the insertion parts 421, 441 are inserted in the insertion reception parts 414, 433. As a result, a closed state of a bottom can be firmly maintained without use of an adhesive tape, a metal fitting or the like.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a cardboard box sheet and a cardboard box (hereinafter referred to as “cardboard box sheet, cardboard box”).

A corrugated cardboard box sheet and a corrugated cardboard box have been conventionally used (for example, Patent Document 1). In the conventional cardboard box, the free piece released from the bottom inner flap is superposed on the inner surface side of the tongue piece by inserting the tongue piece of the bottom outer flap from the insertion cut of the bottom inner flap into the inside of the bottom inner flap. Is.
In the conventional cardboard box, when the storage portion is stored inside, the free piece is pushed downward, the tongue piece is bent downward accordingly, and the locking cut of the tongue piece is shifted up and down, and the protrusion of the free piece Immerses the tongue. Thus, in the conventional cardboard box, the protruding portion of the free piece is locked by the locking cut, and the tongue piece is regulated in the direction of removal from the insertion cut.

JP 2004-155438 A

  In such cardboard box sheets and cardboard boxes, it is important to firmly maintain the closed state of the bottom without using an adhesive tape or metal fittings.

  The problem to be solved by the present invention is to provide a cardboard box sheet and a cardboard box that can firmly maintain the closed state of the bottom without using an adhesive tape or metal fittings.

  One sheet for a corrugated cardboard box according to the present invention includes four side plates and one adhesive margin plate which are continuously provided via folding lines, and both edges of the four side plates via folding curves. Two top face cover plates and four bottom face cover plates provided in succession, and two bottom faces facing each other when assembled into a box among the four bottom face cover plates The cover plate is provided on the overlapping portion of the overlapping portions and a portion of one overlapping portion via a cutting line, and the other overlapping portion of the other overlapping portion is opposite to the overlapping portion of one overlapping portion. The insertion part inserted into the insertion part, and the insertion receiving part provided through the cut line at a place other than the overlapping part, and the remaining facing each other when assembled into a box among the four bottom cover plates The two bottom cover plates have an insertion portion that is inserted between the insertion receiving portion and a portion other than the overlapping portion. To.

  The sheet for a corrugated cardboard box according to the present invention is such that the cut surface of the cutting line of the insertion receiving portion and the end surface on the direction side intersecting the insertion direction of the insertion portion are in contact with each other when assembled in the box. It is characterized in that it constitutes a misalignment prevention unit for preventing the displacement.

  One sheet for a cardboard box according to the present invention is characterized in that an insertion guide is provided on at least one of a cut surface of a cutting line of an insertion receiving portion or an insertion side end portion of the insertion portion.

  In one sheet for a cardboard box according to the present invention, the insertion portion is provided at each end of one overlapping portion, and two insertion receiving portions are provided on each of the two bottom cover plates. In addition, two insertion portions are provided on each of the remaining two bottom cover plates.

  One sheet for a cardboard box according to the present invention is such that the four top cover plates have the same configuration as the four bottom cover plates for each of the cardboard box sheets according to the present invention. Features.

  A corrugated cardboard box according to the present invention is constructed by assembling the cardboard box sheets according to the present invention into a box.

  Another sheet for a cardboard box according to the present invention includes four side plates and one adhesive margin plate which are continuously provided via folding lines, and both edges of the four side plates via folding curves. Two top face cover plates and four bottom face cover plates provided in succession, and two bottom faces facing each other when assembled into a box among the four bottom face cover plates The cover plate has an insertion receiving portion provided through a cutting line, and the remaining two bottom surface cover plates that face each other when assembled into a box among the four bottom surface cover plates are inserted. It has an insertion part to be inserted between the receiving part and the bottom cover plate having the insertion receiving part, and the top cover plate is provided so as to be able to be cut through a cut line, and is cut out when assembled into a box. And a reinforcing plate placed on the inner side of the bottom portion formed by the four bottom surface cover plates.

  Another sheet for a cardboard box according to the present invention includes the sum of the lengths in the width direction of the two bottom cover plates having the insertion receiving portions, and the length in the flow direction of the one bottom cover plate having the insertion portions. However, when the reinforcing plate is assembled into a box, the reinforcing plate is placed in a state of straddling two bottom cover plates having insertion receiving portions inside the bottom portion.

  In another corrugated cardboard sheet according to the present invention, the dimension between the insertion receiving portions of the two bottom cover plates facing each other when assembled into the box and the width of a part of the reinforcing plate are the same or substantially the same. It is characterized by being equivalent.

  Another corrugated cardboard box according to the present invention is constructed by assembling the above-mentioned respective cardboard box sheets of the present invention into a box.

  The cardboard box sheet and cardboard box according to the present invention can firmly maintain the closed state of the bottom without using an adhesive tape or metal fittings.

FIG. 1 is a developed view showing Embodiment 1 of a corrugated cardboard box sheet and cardboard box according to the present invention. FIG. 2 is a bottom perspective view showing a state in which a glue plate is bonded to the side plate and assembled into a square tube shape. FIG. 3 is a bottom perspective view showing a state in which the bottom is assembled. FIG. 4 is a perspective view of the top side showing the assembled state of the top part. FIG. 5 is a bottom view (viewed in the direction of arrow V in FIG. 2) showing a state in which a glue plate is bonded to the side plate and assembled into a square cylinder shape. FIG. 6 is a bottom view (viewed in the direction of arrow V in FIG. 2) showing a state where the third bottom cover plate is bent at 90 °. FIG. 7 is a bottom view (viewed in the direction of arrow V in FIG. 2) showing a state where the first bottom cover plate is bent. FIG. 8 is a bottom view (viewed in the direction of arrow V in FIG. 2) showing a state where the first bottom cover plate is bent at 90 °. FIG. 9 is a bottom view (viewed in the direction of arrow V in FIG. 2) showing a state where the second bottom cover plate and the fourth bottom cover plate are bent. FIG. 10 is a bottom view (as viewed in the direction of arrow X in FIG. 3) showing a state in which the bottom part is assembled by bending the second bottom face cover plate and the fourth bottom face cover plate to 90 °. FIG. 11 is a plan view (a view taken along the line XI in FIG. 3) showing a state in which the bottom is assembled. 12 is a cross-sectional view taken along line XII-XII in FIG. 13 is a cross-sectional view taken along line XIII-XIII in FIG. 14 is a cross-sectional view taken along line XIV-XIV in FIG. 15 is a cross-sectional view taken along line XV-XV in FIG. 16 is a cross-sectional view taken along line XVI-XVI in FIG. FIG. 17 is a developed view showing Embodiment 2 of the cardboard box sheet and cardboard box according to the present invention. FIG. 18 is a perspective view of the top side showing the assembled state of the top part. FIG. 19 is a plan view showing a state in which the bottom is assembled. FIG. 20 is a plan view showing a state where the reinforcing plate is placed on the assembled bottom.

  Hereinafter, two examples of an embodiment of a cardboard box sheet and a cardboard box according to the present invention will be described in detail with reference to the drawings.

(Description of Configuration of Embodiment 1)
1 to 16 show Embodiment 1 of a cardboard box sheet and cardboard box according to the present invention. Hereinafter, the structure of the cardboard box sheet and cardboard box according to Embodiment 1 will be described.

In FIG. 1, reference numeral 1 denotes a cardboard box sheet according to the first embodiment, which is an A-type cardboard box sheet. In FIG. 4, reference numeral 100 denotes a cardboard box according to the first embodiment, which is an A-type cardboard box. The cardboard box 100 is formed by assembling a single cardboard box sheet 1 into a box shape.
FIG. 1 is a development view seen from the outside (outside when the cardboard box sheet 1 is assembled into the cardboard box 100). The inner side is the inner side when the cardboard box sheet 1 is assembled to the cardboard box 100.

  The sheet 1 for cardboard boxes is manufactured from cardboard. Corrugated cardboard is manufactured from two liners (planar base paper) on the front and back and a core (corrugated base paper) bonded between the two liners. The corrugated cardboard is cut into a predetermined width and length (length in the flow direction) to produce an original plate. In FIG. 1, the symbol “X” indicates the flow direction of the production of corrugated cardboard. The symbol “W” is the width direction of the cardboard.

(Description of sheet 1 for cardboard box)
A plurality of cardboard box sheets 1 are manufactured in the width direction W from the original plate through ruled line (folded curve) insertion processing, grooving processing, die cutting processing, and the like. The cardboard box sheet 1 includes four side plates 21, 22, 23, 24 and one glue margin plate 25, four top surface cover plates 31, 32, 33, 34 and four bottom surface lids. Plates 41, 42, 43, 44.

The four side plates 21 to 24 and the one adhesive margin plate 25 are provided continuously in the flow direction X via the folding line 52. The four top cover plates 31 to 34 and the four bottom cover plates 41 to 44 are connected to both edges of the four side plates 21 to 24 in the width direction W via folding lines 53 and 54, respectively. Is provided.
On the three boundary lines of the four top cover plates 31 to 34, grooves 55 are provided, respectively. Similarly, grooves 56 are provided on the three boundary lines of the four bottom cover plates 41 to 44, respectively.

The four side plates 21 to 24 are composed of two sets of two side plates facing each other when the corrugated cardboard sheet 1 is assembled into a box. The two side plates 21 and 23 of one set are side plates of the box length surface. The two side plates 22 and 24 of the other set are side plates of the width surface of the box.
The length X1 in the flow direction X of the long side plates 21 and 23 is longer than the length X2 of the width side plates 22 and 24 in the flow direction X. The length (width) W2 in the width direction W of the four side plates 21 to 24 is the depth of the box. Hereinafter, the four side plates are referred to as a first side plate 21, a second side plate 22, a third side plate 23, and a fourth side plate 24.

The four top cover plates 31 to 34 are composed of two sets of two top cover plates facing each other when the cardboard box sheet 1 is assembled into a box. One set of the two top cover plates 31 and 33 is an inner flap of the box. The other set of two top cover plates 32 and 34 is an outer flap of the box.
The length X1 in the flow direction X of the top cover plates 31 and 33 for the inner flaps is longer than the length X2 in the flow direction X of the top cover plates 32 and 34 for the outer flaps. The length (width) W3 in the width direction W of the four top surface cover plates 31 to 34 is half or almost half of the length X2 in the flow direction X of the side plates 22 and 24 of the width surface. Hereinafter, the four top cover plates are referred to as a first top cover plate 31, a second top cover plate 32, a third top cover plate 33, and a fourth top cover plate 34.

The four bottom cover plates 41 to 44 include two sets of two bottom cover plates that face each other when the corrugated cardboard sheet 1 is assembled into a box. One set of the two bottom cover plates 41 and 43 is an inner flap of the box. The other set of the two bottom cover plates 42 and 44 is an outer flap of the box.
The length X1 in the flow direction X of the bottom cover plates 41, 43 of the inner flap is longer than the length X2 of the bottom cover plates 42, 44 of the outer flap in the flow direction X. The length (width) W4 in the width direction W of the four bottom cover plates 41 to 44 is set to the length W3 in the width direction W3 of the four top cover plates 31 to 34. It is the added length. Hereinafter, the four bottom surface cover plates are referred to as a first bottom surface cover plate 41, a second bottom surface cover plate 42, a third bottom surface cover plate 43, and a fourth bottom surface cover plate 44.

  One first bottom surface cover plate 41 of the inner flap includes an overlapping portion 410, an insertion portion 411, and an insertion receiving portion 414. The other third bottom surface cover plate 43 of the inner flap includes an overlapping portion 430, an insertion receiving portion 431, and an insertion receiving portion 433.

As shown in FIG. 1, the overlapping portions 410 and 430 are provided at the edge portions on the opposite side to the first side plate 21 and the third side plate 23 of the first bottom surface cover plate 41 and the third bottom surface cover plate 43. ing. As shown in FIG. 12, the overlapping portions 410 and 430 overlap each other when the first bottom surface cover plate 41 and the third bottom surface cover plate 43 are bent along the folding line 54.
The overlapping width of the overlapping portions 410 and 430 (the width between the solid line and the two-dot chain line in FIG. 1, the width between two one-dot chain lines in FIG. 12) is the length W1 in the width direction W. In this example, it is about 16 mm. The overlapping width W1 of the overlapping portions 410 and 430 is determined based on the overlapping strength and the good yield when manufacturing a plurality of corrugated cardboard box sheets 1 from the original.

The insertion portion 411 is provided at both ends of the overlapping portion 410 via a cut line 412 and a folding line 413, respectively. The insertion receiving portion 431 is provided at both end portions of the overlapping portion 430 via a groove 432. The length of the insertion portion 411 in the width direction W is equal to or substantially equal to the overlapping width W1 of the overlapping portion 410. The length of the insertion receiving portion 431 in the width direction W is shorter than the overlapping width W1 of the overlapping portion 410.
As shown in FIG. 13, the insertion part 411 is inserted on the opposite side of the insertion receiving part 431 with respect to the side where one overlapping part 410 overlaps the other overlapping part 430 (see FIG. 12).

  The insertion receiving portions 414 and 433 are connected to the portions other than the overlapping portions 410 and 430 among the both end portions of the first bottom surface cover plate 41 and the third bottom surface cover plate 43 via the cut lines 415 and 434 and the folding lines 416 and 435, respectively. Two each are provided. The insertion receiving portions 414 and 433 have a rectangular shape with U-shaped cut lines 415 and 434 and linear folding lines 416 and 435.

  The bottom flap plates 42 and 44 of the outer flap have insertion portions 421 and 441, respectively. As shown in FIG. 1, the insertion portions 421 and 441 are connected to the second side plate 22 and the fourth side plate 24 of the second bottom surface cover plate 42 and the fourth bottom surface cover plate 44 through the recesses 420 and 440, respectively. Two each are provided at both ends of the opposite edge.

  Insertion guides 422, 423, 442, and 443 are provided at insertion side end portions of the insertion portions 421 and 441, respectively. The guides 422, 423, 442, and 443 are provided so as to be inclined so that the width thereof becomes narrower toward the tip in the grooves 56 and the recesses 420 and 440 at the insertion side ends of the insertion portions 421 and 441.

  A folding line 58 is provided in parallel or substantially in parallel with the folding line 54 between the insertion parts 421 and 441 of the bottom flap plates 42 and 44 of the outer flap and the folding line 54.

  The top cover plates 31 and 33 of the inner flap have insertion receiving portions 310 and 330, respectively. The insertion receiving portions 310 and 330 are arranged at the positions near the folding line 53 of both ends of the first top cover plate 31 and the third top cover plate 33 via the cut lines 311 and 331 and the folding curves 312 and 332. Two each are provided. The insertion receiving portions 310 and 330 have a rectangular shape with U-shaped cut lines 311 and 331 and linear folding lines 312 and 332.

  The top cover plates 32 and 34 for the outer flaps have insertion portions 321 and 341, respectively. As shown in FIG. 1, the insertion portions 321 and 341 are connected to the second side plate 22 and the fourth side plate 22 of the second top cover plate 32 and the fourth top cover plate 34 via the two grooves 320 and 340, respectively. Two each are provided at both ends of the edge on the opposite side to the side plate 24.

  In the insertion side ends of the insertion portions 321 and 341, an insertion guide is arranged so that the width becomes narrower toward the tip in the grooves 55 and 320 and 340 at the insertion side end portions of the insertion portions 321 and 341. Inclined. A folding line 57 is provided in parallel or substantially parallel to the folding line 53 between the insertion parts 321 and 341 of the top cover plates 32 and 34 of the outer flap and the folding line 53.

(Description of assembly process of cardboard box 100)
Hereinafter, the process of assembling the cardboard box 100 shown in FIG. 4 using the cardboard box sheet 1 shown in FIG. 1 will be described.

  The four side plates 21 to 24 and the one adhesive margin plate 25 are bent 90 ° inward along the four folding lines 52. Next, the outer surface of the adhesive margin plate 25 is bonded to the inner surface of the edge portion of the fourth side plate 24. Then, as shown in FIGS. 2 and 5, the cardboard box sheet 1 is assembled into a square tube shape. Thereby, the trunk | drum (side part) 2 of the cardboard box 100 is formed. In FIG. 2, the four bottom cover plates 41 to 44 are shown opened outward so that the structure can be understood.

Subsequently, as shown in FIGS. 5 and 6, the third bottom surface cover plate 43 is bent inward by 90 ° (see the solid line arrow in FIG. 5). Next, as shown in FIGS. 6 to 8, the first bottom surface cover plate 41 is bent 90 ° inward (see solid line arrows in FIGS. 6 and 7). At this time, as shown in FIG. 12, the inner surface of the overlapping portion 410 of the first bottom surface cover plate 41 is overlapped with the outer surface of the overlapping portion 430 of the third bottom surface cover plate 43.
Further, as shown in FIG. 13, the insertion portion 411 of the first bottom surface cover plate 41 is cut off from the overlapping portion 410 by a cut line 412 and is bent inward by a folding line 413. Then, the insertion portion 411 of the first bottom surface lid plate 41 is connected to the inside of the insertion receiving portion 431 of the third bottom surface lid plate 43 (that is, the inner side of the overlapping portion 410 of the first bottom surface lid plate 41 is overlapped). The bottom cover plate 43 is inserted into the opposite side of the overlapping portion 430.

  Subsequently, as shown by solid line arrows in FIGS. 8 and 9, the second bottom surface cover plate 42 and the fourth bottom surface cover plate 44 are bent inward by two folding curves 54 and 58. Also, as shown in FIGS. 10 and 11, the second bottom cover plate 42 and the fourth bottom cover plate 44 are bent 90 ° inward.

At this time, as shown in FIGS. 15 and 16, the insertion receiving portion 414 of the first bottom cover plate 41 and the insertion receiving portion 433 of the third bottom cover plate 43 are connected to the overlapping portions 410, 430 along the cut lines 415, 434. And is bent inward at folding lines 416 and 435. Further, as shown in FIGS. 9 to 11, 15, and 16, the insertion portion 421 of the second bottom surface cover plate 42 and the insertion portion 441 of the fourth bottom surface cover plate 44 are connected to the first and second lines 415 and 434, respectively. Between the insertion receiving portion 414 of the first bottom surface cover plate 41 and a portion other than the overlapping portion 410 (first bottom surface cover plate 41), the portion other than the insertion receiving portion 433 and the overlapping portion 430 of the third bottom surface cover plate 43 The third bottom cover plate 43 is inserted between each. Thereby, the bottom part 4 of the cardboard box 100 is formed.
Here, the bending direction of the first bottom cover plate 41 and the third bottom cover plate 43 (the direction indicated by the solid line arrow in FIGS. 5 to 7), the second bottom cover plate 42, and the fourth bottom cover plate. The bending direction of 44 (solid arrow direction in FIGS. 8 and 9) is orthogonal or almost orthogonal.

  Then, as shown in FIGS. 10 and 14, a direction (for example, a direction intersecting the cutting surface 417 of the cutting line 415 of the insertion receiving portion 414 of the first bottom surface cover plate 41 and the insertion direction of the insertion portions 421 and 441 (for example, The end surfaces 424 and 444 on the side perpendicular to or substantially perpendicular to the insertion direction are in contact with each other. The cut surface 417 and the end surfaces 424 and 444 constitute a misalignment prevention unit that prevents the mutual displacement in the direction intersecting the insertion direction of the insertion units 421 and 441.

  A stored item (not shown) is stored in the cardboard box 100 in which the bottom portion 4 is formed by the above-described process. Then, as shown in FIG. 4, the first top cover plate 31 and the third top cover plate 33 are bent 90 ° inward. At this time, as shown in FIG. 1, the length W3 in the width direction W of the first top cover plate 31 and the third top cover plate 33 is the flow direction X of the second side plate 22 and the fourth side plate 24. Is half or almost half of the length X2. Therefore, the first top cover plate 31 and the third top cover plate 33 that are bent inward by 90 ° do not overlap but are abutted to become flat or substantially flat.

  Subsequently, the second top cover plate 32 and the fourth top cover plate 34 are bent inward at the folding line 57 and 90 ° inward at the folding line 53. At this time, the insertion receiving portion 310 of the first top cover plate 31 and the insertion receiving portion 330 of the third top cover plate 33 are connected to the first top cover plate 31 and the third top surface along the cut lines 311 and 331, respectively. Separate from the cover plate 33 and bend inward at the folding lines 312 and 332. Further, the insertion portion 421 and the insertion portion 441 are inserted between the insertion receiving portions 310 and 330 and the first top cover plate 31 and the third top cover plate 33 from the cut lines 415 and 434, respectively. Thereby, the top part 3 of the cardboard box 100 is formed.

  Through the above steps, the cardboard box sheet 1 shown in FIG. 1 is assembled into the cardboard box 100 shown in FIG.

(Description of the effect of Embodiment 1)
The cardboard box sheet 1 and the cardboard box 100 according to the first embodiment are configured as described above, and the effects thereof will be described below.

  The cardboard box sheet 1 and the cardboard box 100 according to the first embodiment can firmly maintain the closed state of the bottom portion 4 without using an adhesive tape or a metal fitting. Details will be described below.

In the cardboard box sheet 1 and the cardboard box 100 according to the first embodiment, the weight of the stored item is applied to the bottom 4 of the cardboard box 100 as indicated by the white arrows in FIGS. At this time, the bending direction of the first bottom surface cover plate 41 and the third bottom surface cover plate 43 (the direction indicated by the solid line arrow in FIGS. 5 to 7), the second bottom surface cover plate 42, and the fourth bottom surface cover plate 44. Is perpendicular or almost orthogonal to the bending direction (the solid arrow direction in FIGS. 8 and 9).
For this purpose, the second bottom cover plate 42 and the fourth bottom cover plate 44 are opened to the outside through the insertion portions 421 and 441. The first bottom cover plate 41 and the third bottom cover plate 43 are opened to the outside. prevent. As a result, the bottom 4 of the cardboard box 100 can be kept closed.

In particular, the cardboard box sheet 1 and the cardboard box 100 according to Embodiment 1 are formed by overlapping the inner side surface of the overlapping portion 410 of the first bottom surface cover plate 41 and the third bottom surface cover plate 43 as shown in FIG. The outer surface of the part 430 is overlapped with the overlapping width W1. Further, in the cardboard box sheet 1 and the cardboard box 100 according to the first embodiment, as shown in FIG. 13, the outer side of the insertion portion 411 of the first bottom surface cover plate 41 is different from the third bottom surface cover plate 43. It abuts on the inside of the receiving portion 431 (that is, on the opposite side to the outside of the overlapping portion 430 of the third bottom surface cover plate 43 where the inside of the overlapping portion 410 of the first bottom surface cover plate 41 overlaps).
As a result, the cardboard box sheet 1 and the cardboard box 100 according to the first embodiment are the cardboard box sheet and cardboard box in which the first bottom cover plate and the third bottom cover plate are abutted without overlapping each other. Alternatively, the closed state of the bottom portion 4 of the cardboard box 100 is firmly maintained as compared with the cardboard box sheet or cardboard box in which the first bottom face cover plate and the third bottom face cover plate simply overlap each other. Can do.

  Thereby, the sheet | seat 1 for cardboard boxes and the cardboard box 100 concerning this Embodiment 1 can be conveyed in the state which accommodated the heavy storage thing (for example, fruit, vegetables, etc. of 10 kg or more). Moreover, the cardboard box sheet 1 and the cardboard box 100 according to the first embodiment are configured so that the corrugated cardboard is caused by the moisture contained in the stored item or the moisture adhering to the stored item (for example, the moisture contained in vegetables such as radish or adhering moisture). Even if it deteriorates, the closed state of the bottom part 4 of the cardboard box 100 can be maintained, and the bottom part of the bottom part 4 can be prevented from being deformed.

  The cardboard box sheet 1 and the cardboard box 100 according to the first embodiment can firmly maintain the closed state of the bottom portion 4 without using an adhesive tape or a metal fitting. Therefore, the cardboard box sheet 1 and the cardboard box 100 according to the first embodiment can be easily and safely assembled, disassembled, and disposed of. Moreover, since the cardboard box sheet 1 and the cardboard box 100 according to the first embodiment do not use adhesive tape, metal fittings, etc., only the cardboard is discarded, which is good for the environment.

As shown in FIGS. 10 and 14, the corrugated cardboard sheet 1 and the corrugated cardboard box 100 according to the first embodiment include a cut surface 417 of a cutting line 415 of the insertion receiving portion 414 of the first bottom cover plate 41, and a second one. The end surfaces 424 and 444 on the direction side intersecting the insertion direction of the insertion portions 421 and 441 of the bottom surface cover plate 42 and the fourth bottom surface cover plate 44 are in contact with each other. As a result, in the cardboard box sheet 1 and the cardboard box 100 according to the first embodiment, the cut surface 417 and the end surfaces 424 and 444 are displaced from each other in the direction intersecting the insertion direction of the insertion portions 421 and 441. To prevent. Thereby, the sheet | seat 1 for cardboard boxes and the cardboard box 100 concerning this Embodiment 1 are the 1st bottom face lid | cover located outside with respect to the 3rd bottom face lid plate 43, as shown by the solid line arrow in FIG. Even if a force acts on the end surface of the plate 41, it is possible to prevent the first bottom surface cover plate 41 from shifting in the direction of the solid arrow with respect to the third bottom surface cover plate 43.
That is, in the cardboard box sheet 1 and the cardboard box 100 according to the first embodiment, even if a force acts on the end surface of the first bottom cover plate 41, the overlapping portion 410 and the third portion of the first bottom cover plate 41 are arranged. The overlapping state with the overlapping portion 430 of the bottom cover plate 43 can be maintained. Therefore, the cardboard box sheet 1 and the cardboard box 100 according to the first embodiment can firmly maintain the closed state of the bottom 4 of the cardboard box 100.

  In the cardboard box sheet 1 and the cardboard box 100 according to the first embodiment, insertion guides 422, 423, 442, and 443 are provided at insertion side ends of the insertion parts 421 and 441. For this purpose, the cardboard box sheet 1 and the cardboard box 100 according to the first embodiment include the insertion portions 421 and the insertion portions 441 of the second bottom surface cover plate 42 and the fourth bottom surface cover plate 44, which are cut lines 415 and 434. To the first bottom cover plate 41 and the third bottom cover plate 43 other than the insertion receiving portions 414 and 433 and the overlapping portions 410 and 430 (first bottom cover plate 41 and third bottom cover plate 43). Between each and easily and securely. Thereby, the sheet | seat 1 for cardboard boxes and the cardboard box 100 concerning this Embodiment 1 are very easy to assemble.

  In the cardboard box sheet 1 and the cardboard box 100 according to the first embodiment, the insertion portions 411 are provided at both ends of the overlapping portion 410 of the first bottom surface cover plate 41, and the insertion receiving portions 414 and 433 are provided. Two each of the first bottom cover plate 41 and the third bottom cover plate 43 are provided, and the insertion portions 421 and 441 are the remaining two second bottom cover plates 42 and the fourth bottom surface. Two cover plates 44 are provided. As a result, the cardboard box sheet 1 and the cardboard box 100 according to the first embodiment can more firmly maintain the closed state of the bottom portion 4 without using an adhesive tape or a metal fitting.

(Description of Configuration of Embodiment 2)
FIGS. 17-20 shows Embodiment 2 of the cardboard box sheet and cardboard box according to the present invention. Hereinafter, the structure of the cardboard box sheet and cardboard box according to the second embodiment will be described.

  In FIG. 17, reference numeral 1A denotes a cardboard box sheet according to the second embodiment, which is an A-type cardboard box sheet. In FIG. 18, reference numeral 100A denotes a cardboard box according to the second embodiment, which is an A-type cardboard box. 17 to 20, the same reference numerals as those in FIGS. 1 to 16 denote the same components.

  The cardboard box sheet 1 </ b> A according to the second embodiment is obtained by providing a reinforcing plate 342 on a part of the fourth top cover plate 34. That is, at least one fourth top cover plate 34 among the four top cover plates 31 to 34 has at least one reinforcing plate 342.

The reinforcing plate 342 is provided at the edge of the fourth top cover plate 34 on the opposite side to the fourth side plate 24 so as to be cut off via a cut line 343 and a cut line 344. The reinforcing plate 342 is cut out when assembled into a box and placed inside the bottom portion 4 formed by the four bottom surface cover plates 41 to 44.
The cut line 343 is provided at both ends of the cut line 344. In this example, the cut line 344 has a perforation shape in which cut lines and connection portions are alternately continued.
The cardboard box sheet 1A according to the second embodiment is the same as the cardboard box sheet 1 according to the first embodiment. One of the two insertion receiving portions 310 and 330 of the cover plate 31 and the third top cover plate 33) is omitted. Note that the second top cover plate 32 remains as it is.

The cardboard box sheet 1A according to the second embodiment is opposed to each other when assembled into a box among the cardboard box sheets 1 according to the first embodiment, and two insertion receiving portions 414, 433 are respectively provided. The overlapping portions 410 and 430, the insertion portion 411, and the insertion receiving portion 431 of the two bottom surface cover plates (the first bottom surface cover plate 41 and the third bottom surface cover plate 43) are omitted.
Note that two bottom cover plates (second bottom cover plate 42 and fourth bottom cover plate 44) that face each other when assembled into a box and have two insertion portions 421 and 443, respectively. Is as it is.

  Thus, the sum of the length W3 in the width direction W of the two bottom cover plates 41 and 43 having the insertion receiving portions 414 and 433 and one bottom surface having the two insertion portions (421 or 441). The length X2 in the flow direction X of the cover plate (42 or 44) is equivalent or substantially equivalent. That is, W3 + W3 = X2 (the length W3 of the first bottom surface cover plate 41 in the width direction W + the length W3 of the third bottom surface cover plate 43 in the width direction W = the length of the second bottom surface cover plate 42 in the flow direction X) X2 or the length X2) of the fourth bottom surface cover plate 44 in the flow direction X.

  As a result, the structure and size (size) of the four bottom cover plates 41 to 44 of the cardboard box sheet 1A according to the second embodiment are the same as the four bottom cover sheets of the existing (general) cardboard box sheet. It is equivalent or almost equivalent to the structure and dimensions (size) of the plate.

  As shown in FIG. 20, the reinforcing plate 342 has a substantially rectangular shape in which the width (short side length) T1 of both end portions is slightly smaller than the width of the intermediate portion. Note that, as shown in FIG. 17, the length of the long side of the reinforcing plate 342 is equal to or substantially the same as the length X2 of the fourth top cover plate 34 in the flow direction. As shown in FIG. 17, the length W3 of the reinforcing plate 342 and the fourth top cover plate 34 in the width direction W is the length of the other three top cover plates 31 to 33 in the width direction W. It is equivalent or almost equivalent to the length W3.

  Between the two insertion receiving portions 414 and 433 of the two bottom surface cover plates 41 and 43 facing each other when assembled in the box (that is, the two insertion reception portions 414 of the first bottom surface cover plate 41 and Between the two insertion receiving parts 433 of the 3rd bottom face cover plate 43, it has the clearance gap of the dimension T2, respectively. As shown in FIGS. 19 and 20, the dimension T2 and the width T1 of both end portions which are a part of the reinforcing plate 342 are equivalent or substantially equivalent.

  As shown in FIG. 17, the space between the two insertion receiving portions 414 in the flow direction X of the first bottom surface cover plate 41 has a length X3. Similarly, the length between the two insertion receiving portions 433 in the flow direction X of the third bottom surface cover plate 43 has a length X3. The length X3 in the flow direction X of the two insertion receiving portions 414 and 434 of the two bottom cover plates 41 and 43 facing each other when assembled in the box, and the long side length X2 of the reinforcing plate 342 , Equivalent or nearly equivalent.

  As shown in FIG. 17, a guide 313 is provided at the corner of the first top cover plate 31 on the side opposite to the first side plate 21 on the side of the adhesive margin plate 25. Further, a guide 333 is provided at the corner on the side of the fourth top cover plate 34 and the reinforcing plate 342 at the edge opposite to the third side plate 23 of the third top cover plate 33. The guides 313 and 333 are inclined.

(Description of assembly of cardboard box 100A)
The cardboard box sheet 1A according to the second embodiment configured as described above is assembled in the same manner as the cardboard box sheet 100 according to the first embodiment by assembling the cardboard box sheet 1A according to the first embodiment. A corrugated cardboard box 100A according to the second embodiment is obtained.

  Here, as shown in FIG. 18, a cut line 344 between the reinforcing plate 342 and the fourth top cover plate 34 is cut, and the reinforcing plate 342 is cut from the fourth top cover plate 34. The reinforcing plate 342 is cut out at least before the top 3 is formed from the four top cover plates 31 to 34.

  The reinforcing plate 342 that has been cut out is placed at the approximate center inside the bottom portion 4 formed from the four bottom cover plates 41 to 44. That is, as shown in FIG. 20, both ends of the reinforcing plate 342 are inserted into the two insertion receiving portions 414 of the first bottom surface cover plate 41 and the third bottom surface cover plate 43 assembled into the box. Each is press-fitted between the receiving portion 433 and the receiving portion 433.

  Accordingly, the reinforcing plate 342 is fixed to the bottom portion 4 formed from the four bottom surface cover plates 41 to 44. The bottom part 4 is reinforced by a reinforcing plate 342. A stored item is stored in the cardboard box 100 </ b> A, and the top portion 3 is formed from the four top cover plates 31 to 34. As a result, the cardboard box 100A according to the second embodiment is assembled.

(Description of the effect of Embodiment 2)
Since the cardboard box sheet 1A and the cardboard box 100A according to the second embodiment are configured as described above, the same effects as the cardboard box sheet 1 and the cardboard box 100 according to the first embodiment can be achieved. it can.

  In particular, the cardboard box sheet 1 </ b> A and the cardboard box 100 </ b> A according to the second embodiment are placed as a reinforcing plate 342 at substantially the center inside the bottom portion 4 using a part of the fourth top cover plate 34. Is. For this reason, the cardboard box sheet 1A and the cardboard box 100A according to the second embodiment are provided with sufficient strength at the bottom portion 4 by the reinforcing plate 342 placed almost at the center inside the bottom portion 4. It is possible to prevent bottom-out deformation and the like, and to maintain the closed state of the bottom portion 4.

  The cardboard box sheet 1 </ b> A and the cardboard box 100 </ b> A according to the second embodiment includes two insertion receiving portions 414 of the first bottom surface cover plate 41 and the third bottom surface cover plate 43 in which the reinforcing plate 342 is assembled in the box. It is arranged between the two insertion receiving parts 433. That is, in the cardboard box sheet 1A and the cardboard box 100A according to the second embodiment, the reinforcing plate 342 straddles the two bottom cover plates 41 and 43 having the two insertion receiving portions 414 and 433, respectively. Has been placed.

  For this reason, the cardboard box sheet 1A and the cardboard box 100A according to the second embodiment have the same structure and dimensions of the four bottom cover plates 41 to 44 as those of the existing (general) cardboard box sheets. As for the structure and dimensions of the bottom cover plate, sufficient strength can be obtained at the bottom portion 4 by the reinforcing plate 342 straddling the two bottom cover plates 41 and 43. As a result, the cardboard box sheet 1A and the cardboard box 100A according to the second embodiment are used for the four bottom surfaces of the corrugated cardboard box sheets of which the structure and dimensions of the four bottom cover plates 41 to 44 are existing (general). Even with the structure and dimensions of the cover plate, the bottom plate 4 can be prevented from being deformed by the reinforcing plate 342 straddling the two bottom cover plates 41 and 43, and the closed state of the bottom portion 4 can be maintained. Can do.

  The cardboard box sheet 1A and the cardboard box 100A according to the second embodiment include a dimension T2 between the insertion receiving portions 414 and 413 of the two bottom cover plates 41 and 43 when assembled into a box, and a reinforcing plate 342. Is equal to or substantially equal to the width T1 of both end portions. For this reason, in the cardboard box sheet 1A and the cardboard box 100A according to the second embodiment, both end portions of the reinforcing plate 342 are connected to the two insertion receiving portions 414 of the first bottom surface cover plate 41 assembled in the box. Between the two insertion receiving parts 433 of the 3rd bottom face cover plate 43, it press-fits respectively.

  Thereby, the cardboard box sheet 1 </ b> A and the cardboard box 100 </ b> A according to the second embodiment can fix the reinforcing plate 342 at a predetermined position of the bottom portion 4. As a result, the cardboard box sheet 1A and the cardboard box 100A according to the second embodiment can reliably prevent the bottom portion 4 from being deformed by the reinforcing plate 342 fixed to a predetermined position of the bottom portion 4. The closed state of the bottom 4 can be reliably maintained.

  The cardboard box sheet 1A and the cardboard box 100A according to the second embodiment include the length X3 of the two insertion receiving portions 414, 434 of the two bottom cover plates 41, 43 in the flow direction X and the reinforcing plate 342. The long side length X2 is equivalent or almost equivalent. For this reason, the cardboard box sheet 1A and the cardboard box 100A according to the second embodiment are configured such that the insertion receiving portions 414 of the two bottom cover plates 41 and 43 when both ends of the reinforcing plate 342 are assembled into the box, Positioned securely between 413. Thereby, the cardboard box sheet 1A and the cardboard box 100A according to the second embodiment can reliably fix the reinforcing plate 342 at a predetermined position of the bottom portion 4.

(Description of examples other than Embodiment 1)
In the first embodiment, the bottom cover plates 41 to 44 are connected to the overlapping portions 410 and 430, the insertion portion 411, the insertion receiving portions 414 and 433 via the cut lines 415 and 434, and the insertion portion 421. , 441 and guides 422, 423, 442, 443 are provided. However, in the present invention, the top cover plates 31 to 34 are connected to the overlapping portions 410 and 430, the insertion portion 411, the insertion receiving portions 414 and 433 via the cut lines 415 and 434, the insertion portion 421, 441 and guides 422, 423, 442, and 443 may be provided. In this case, the top cover plates 31 to 34 cannot be easily opened. This can prevent theft of expensive items (for example, expensive fruits or expensive industrial products).

  Moreover, in this Embodiment 1, the insertion part 411 is provided in the both ends of the superposition | polymerization part 410 of the cover plate 41 for 1st bottom faces. However, in the present invention, the insertion portions 411 may be provided at both ends of the overlapping portion 430 of the third bottom surface lid plate 43.

  Furthermore, in this Embodiment 1, the insertion part 411 is provided in the both ends of the superposition | polymerization part 410 of the 1st bottom face cover plate 41, respectively, and in this Embodiment 1, 2, the insertion receiving parts 414 and 433 are provided. Two pieces are provided on each of the two first bottom face cover plates 41 and the third bottom face cover plate 43, and the insertion portions 421 and 441 are the remaining two second bottom face cover plates 42 and fourth bottom face cover plates. Two are provided in each of 44. However, in the present invention, the number, shape, and position of the insertion portion 411, the insertion receiving portions 414 and 433, and the insertion portions 421 and 441 are not particularly limited.

  Furthermore, in the second embodiment, a reinforcing plate 342 is provided on the fourth top cover plate 34. However, in the present invention, at least one reinforcing plate 342 may be provided on at least one top cover plate among the four top cover plates 31 to 34.

  Furthermore, in Embodiments 1 and 2, an A-type cardboard box sheet and an A-type cardboard box will be described. However, the present invention can be applied to other types of cardboard box sheets and cardboard boxes.

1, 1A cardboard box sheet 100, 100A cardboard box 2 trunk (side)
21-24 Side plate 25 Glue margin plate 3 Top part 31-34 Top cover plate 310, 330 Insertion receiving part 311, 331 Cut line 312, 332 Folding curve 313, 333 Guide 320, 340 Groove 321, 341 Insertion part 342 Reinforcement plate 343 Cut line 344 Cut line 4 Bottom part 31-34 Bottom cover plate 410, 430 Superposition part 411 Insertion part 412 Cut line 413 Folding line 431 Insertion receiving part 432 Groove 414, 433 Insertion receiving part 415, 434 Cutting line 416, 435 Folding curve 417 Cut surface (shift prevention)
420, 440 Concave part 421, 441 Insertion part 422, 423, 442, 443 Guide 424, 444 End face (displacement prevention part)
52, 53, 54, 57, 58 Folding curve 55, 56 Groove T1 Width T2 Dimensions X Flow direction X1, X2 Length W Width direction W1, W2, W3, W4 Length

Claims (10)

Four side plates and one paste margin plate provided continuously through a folding line;
Four top surface cover plates and four bottom surface cover plates that are continuously provided on both edges of the four side plates through folding lines, respectively;
With
Of the four bottom cover plates, the two bottom cover plates facing each other when assembled into a box are:
Overlapping portions overlapping each other;
An insertion part that is provided via a cutting line in a part of one of the overlapping parts, and is inserted on the opposite side with respect to the overlapping side of one of the overlapping parts of the other overlapping part;
An insertion receiving portion provided via a cutting line at a place other than the overlapping portion;
Have
Of the four bottom cover plates, the remaining two bottom cover plates facing each other when assembled into a box are inserted between the insertion receiving portion and a portion other than the overlapping portion. Having a part,
A sheet for a cardboard box. The misalignment prevention part which prevents the cut surface of the said cut line of the said insertion receiving part, and the end surface of the direction side which cross | intersects the insertion direction of the said insertion part from mutually contacting | abutting when assembled in a box Make up,
The sheet for cardboard boxes according to claim 1 characterized by things. An insertion guide is provided on at least one of the cut surface of the cut line of the insertion receiving portion or the insertion side end portion of the insertion portion,
The sheet for cardboard boxes according to claim 1 or 2 characterized by things. The insertion portion is provided at both ends of one of the overlapping portions,
Two insertion receiving portions are provided on each of the two bottom cover plates,
Two insertion parts are provided on each of the remaining two bottom cover plates,
The sheet | seat for cardboard boxes of any one of Claims 1-3 characterized by the above-mentioned. The four top cover plates have the same configuration as the four bottom cover plates according to any one of claims 1 to 4.
A sheet for a cardboard box. It is constructed by assembling the cardboard box sheet according to any one of claims 1 to 5 into a box,
A cardboard box characterized by that. Four side plates and one paste margin plate provided continuously through a folding line;
Four top surface cover plates and four bottom surface cover plates that are continuously provided on both edges of the four side plates through folding lines, respectively;
With
Of the four bottom cover plates, the two bottom cover plates facing each other when assembled into a box have an insertion receiving portion provided via a cutting line,
Of the four bottom cover plates, the remaining two bottom cover plates facing each other when assembled into a box are between the insertion receiving portion and the bottom cover plate having the insertion receiving portion. Having an insertion part to be inserted into
The top cover plate is provided so as to be cut through a cut line, and is cut out when assembled into a box and placed on the inner side of the bottom formed by the four bottom cover plates. Having
A sheet for a cardboard box. The sum of the lengths in the width direction of the two bottom face cover plates having the insertion receiving portion and the length in the flow direction of the one bottom face cover plate having the insertion portions are equal or substantially equal. Yes,
The reinforcing plate is placed in a state of straddling two bottom cover plates having the insertion receiving portion inside the bottom when assembled in a box,
The sheet | seat for cardboard boxes of Claim 7 characterized by the above-mentioned. The dimension between the insertion receiving portions of the two bottom cover plates facing each other when assembled into a box, and the width of a part of the reinforcing plate are equivalent or substantially equivalent.
The sheet for cardboard boxes according to claim 7 or 8. It is constituted by assembling the cardboard box sheet according to any one of claims 7 to 9 into a box,
A cardboard box characterized by that.

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