JP3134919U - Assembled cardboard box - Google Patents

Abstract

An object of the present invention is to increase the fixing strength between a side plate and a base plate at the time of assembling a development sheet, and form a bottom plate, a side plate and a side plate on a single development sheet to perform manufacturing and assembly operations with high accuracy.
A corrugated board basket 10 is assembled by folding a development sheet made of a reinforced corrugated board into a box shape along a V-groove. The side plates 12B and 12B are bent substantially vertically on the left and right sides of the bottom plate 12A, and the end plate 12C is bent substantially vertically before and after the bottom plate 12A. The side plate 12B is provided with sandwiching margin plates 12E and 12E which are bent vertically inwardly at positions shifted to the center side in the front-rear direction of the bottom plate 12A by the thickness of the spread sheet with respect to the end plate 12C. The twelve plate 12C includes a bridging plate 12F that is bent substantially horizontally inwardly above the pinch plate 12E, and a folded plate 12G that is bent substantially vertically downward from the tip of the bridging plate 12F and overlaps the pinch plate 12C. Is provided.
[Selection] Figure 6

Description

  The present invention relates to a corrugated cardboard cage, and more particularly, to a simple assembly type corrugated cardboard cage that folds and assembles a development sheet of a reinforced corrugated board.

  Conventionally, a corrugated cardboard basket is known as an alternative to a wooden basket. Corrugated cardboard boxes are attracting attention as environmentally friendly funerals because they are lighter and more combustible than wooden boxes, and can be easily assembled by folding the cardboard board.

  Recently, a reinforced corrugated board having a multilayer structure impregnated with a special resin or the like has begun to be adopted as a material for the corrugated board bag. Then, a corrugated cardboard cage has been proposed in which a developed sheet is produced by subjecting such a reinforced corrugated board to V-groove processing, and the developed sheet is bent along the V-groove.

  For example, as shown in FIGS. 14 and 15, a conventional corrugated cardboard basket 1 is formed of a corrugated body 2 and a lid 3 by a reinforced corrugated board. Of these, the bag body 2 is assembled by folding a development sheet P0 (see FIG. 15) made of a reinforced corrugated board into a box shape.

As shown in FIG. 15, the development sheet P0 is provided with side plates 2B, 2B on the left and right sides of the rectangular bottom plate 2A, and with end plates 2C, 2C before and after the bottom plate 2A. On each side of the bottom plate 2A, a vertical V-groove y0 and a horizontal V-groove x0 are cut into a V shape at an approximately 90 ° angle along the boundary between the side plate 2B and the end plate 2C. From the state shown in FIG. 15, the side plate 2B and the end plate 2C are bent substantially vertically by the vertical V groove y0 and the horizontal V groove x0 with respect to the bottom plate 2A, and these V groove surfaces are fixed with an adhesive, an adhesive tape, etc. The main body 2 is completed.
The frame plate 2D folded back along the W grooves (grooves formed by arranging the V grooves cut at approximately 90 ° in parallel) at the tips of the side plate 2B and the end plate 2C is an opening of the bag body 2 It is for reinforcing the part.

  In addition, Patent Documents 1 and 2 are disclosed as prior art of corrugated cardboard baskets.

JP 2000-42064 A JP 2005-187049 A

  However, in the conventional corrugated cardboard cage as described above, it is difficult to sufficiently secure the fixing strength between the side plate 2B and the end plate 2C when the cage body 2 is assembled. That is, since the contact area between the V-groove surfaces of the side plate 2B and the end plate 2C is small and the standing posture of these plates tends to collapse, there is a problem that the fixing strength between the side plate 2B and the end plate 2C cannot be sufficiently increased.

  On the other hand, as disclosed in Patent Documents 1 and 2, there is also known a technique for increasing the fixing strength by providing concave grooves and hooks in the connecting portion between the plates. Since the end plates are formed separately, the number of parts increases, and the manufacturing and assembling work of the corrugated board is complicated. In particular, when the end plate part is retrofitted to the development sheet side, the direction and the fixing position of the end plate are displaced, and the dimensional accuracy is likely to be lowered.

  The present invention has been made in view of such a situation, and enhances the fixing strength between the side plate and the side plate at the time of assembling the development sheet, and forms and forms the bottom plate, the side plate and the side plate on the single development sheet. An object of the present invention is to provide an assembly type corrugated cardboard cage which can perform the above-mentioned work accurately and easily.

[First Device]
Assembling type corrugated cardboard cage of the 1st device for solving the above-mentioned subject is,
A corrugated cardboard box which is formed by forming V-grooves in the longitudinal and lateral directions of a development sheet made of reinforced corrugated board and folding the development sheet into a box shape along the V-grooves,
A rectangular bottom plate;
A rectangular side plate that is bent substantially vertically by a vertical V-groove on the left and right of the bottom plate;
A rectangular twill plate that is bent substantially vertically by a lateral V-groove before and after the bottom plate,
The side plate has a pinch margin that is bent substantially vertically inward by a lateral V-groove and overlaps the inside of the end plate at a position shifted to the center side in the front-rear direction of the bottom plate by the thickness of the spread sheet from the end plate. A board is provided,
On the end plate, a bridging plate that is bent substantially horizontally inward by a lateral V-groove above the pinch plate, and an inner side of the pinch plate that is bent substantially vertically downward by a horizontal V-groove from the tip of the bridging plate. And a folded plate that overlaps with each other.

  When assembling the corrugated board cage of the present invention, for example, first, the side plate is bent vertically along the vertical V-grooves on the left and right sides of the bottom plate, and further, the sandwiching plate is bent vertically inward before and after the side plate. Next, the end plate, the bridging plate and the folded plate are folded at about 90 ° along the lateral V-groove so as to embrace the sandwiching plate, and the end plate and the folded plate are overlapped on the outside and inside of the sandwiched plate, respectively.

According to such a structure, a contact surface can be ensured in a wide range on these plate surfaces by overlapping the end plate and the folded plate on the outer side and the inner side of the sandwiching plate, respectively. Thereby, the fixed strength of the side plate and the end plate can be increased, and the load resistance of the corrugated board can be improved.
In addition, it is desirable to use an adhesive, an adhesive tape, or the like as a means for fixing the corrugated cardboard basket. However, in the configuration of the present invention, if the folded plate is prevented from jumping up inside the corrugated cardboard basket after assembly, it is not always necessary. The fixing means may not be used. For example, by making the width of the folded plate approximately equal to the width of the bottom plate and pushing it between the side plates facing each other, or dropping the inner bottom plate into the inside of the cardboard box like a lid and stopping the tip of the folded plate Further, the upward folding of the folded plate may be prevented.

  In addition, according to the configuration of the first device, in addition to the bottom plate, the side plate, and the end plate, the sandwiching plate, the bridging plate, and the folded plate can be formed with a single developed sheet (one sheet). It becomes possible to manufacture corrugated cardboard well. Further, a corrugated board with high dimensional accuracy can be easily assembled simply by bending the developed sheet along the vertical V-groove and the horizontal V-groove.

  Further, in the configuration of the present invention, the sandwiching plate is folded at a position shifted inward from the end plate by the thickness of the unfolded sheet before and after the side plate, so even if the unfolded sheet has a large plate thickness, The substitute plate and the end plate do not interfere with each other, and the bending and fixing operations of these plates can be easily performed.

[Second Device]
The assembly type corrugated cardboard cage of the second device has the structure of the first device,
A concave groove portion is provided at the upper end of the sandwiching margin plate so as to receive the bridge plate from the upper end of the side plate with a width substantially equal to the width of the end plate and substantially equal to the thickness of the spread sheet.

  According to such a configuration, when the bridging plate is bridged over the sandwiching margin plate, the bridging plate fits snugly into the groove portion. For this reason, there is no step at the boundary between the end plate and the side plate, and the appearance of the corrugated board can be improved. In addition, the lid of the bag can be easily placed on the end plate and the side plate.

[Third Device]
The assembly type corrugated cardboard cage of the third device has the structure of the first or second device,
The clamping margin plates are configured to be bent substantially vertically inwardly at the distal ends of the left and right side plates, and the distal ends thereof are adjacent to each other. A puzzle piece piece projecting continuously from the plate surface and a puzzle piece fitting portion that is cut out and opened in the plate surface of the other sandwiching plate and is fitted to the puzzle piece piece are provided.

According to such a configuration, when the left and right sandwiching margin plates are brought into contact with each other and the puzzle piece piece is engaged with the puzzle piece fitting portion, these sandwiching margin plates are held in a temporarily fixed state on the same plane. For this reason, it becomes easy to perform an assembling operation of the corrugated board, particularly an operation of fixing the end plate, the bridging plate and the folded plate to the sandwiching margin plate.
In addition, by engaging the puzzle piece piece and the puzzle piece fitting part, even if the left and right side plates are pulled outward, the left and right sandwiching plate is prevented from coming off from the fixed part of the end plate, bridge plate and folded plate In addition, the fixing strength of the corrugated board can be further improved.

[Fourth Device]
The assembly type corrugated cardboard cage of the fourth device comprises any one of the first to third devices,
The unfolded sheet is provided with folding cuts that are continuous on a straight line in the front-rear direction at a predetermined distance from the side edge of the bottom plate on the plate surface of the side plate on either one of the left and right sides and the sandwiching plate. It was set as the structure.

When storing and transporting the unfolded sheet, the bottom plate, the side plate, and the end plate may be folded back along the V-groove to the opposite side from the time of assembly. For example, when the left and right side plates are folded back and stacked on the lower side of the bottom plate, the form of the unfolded sheet becomes compact and easy to handle.
However, in the configuration of the first to third devices, in addition to the bottom plate, the side plate and the end plate, the sandwiching plate, the bridging plate and the folded plate are included in the unfolded sheet, so when trying to fold the unfolded sheet as described above, It can happen that the unfolded sheet does not become compact due to the obstruction of the plate.

According to the configuration of the fourth device, first, one of the left and right side plates (the one without the folding cut) is folded 180 degrees below the bottom plate, and at the same time, the front and rear clamping plates of the side plate are Overlay on the bottom.
Next, the bridge plate and the folded plate before and after the end plate are folded 180 ° outward along the lateral V-groove so as to have a U-shaped cross section, and the folded plate is placed under the above-described sandwiching plate. Overlapping.
In this state, the other side plate (the one where the folding cut is present) is folded back 180 ° by the vertical V groove and the folding cut, and the lower side of the first folded side plate Bring it to you. Then, the clamping margin plates before and after this side plate overlap with the lower side of the folded plate.
By such a procedure, the unfolded sheets can be stacked and folded compactly, and handling such as storage and transportation can be facilitated.

Note that the configuration of the fourth device is different from the configuration in which such a cut is provided in the bottom plate (see FIG. 5 of Patent Document 2) in that a cut for folding is provided in the side plate.
When the folding cuts are present in the bottom plate, deformation or breakage of the ridges is likely to occur when a load is applied in the vicinity of the side plate cuts. On the other hand, in the structure of this invention, since the said cut | interruption is arrange | positioned at the side-plate side, it becomes possible to keep the structural intensity | strength of a corrugated cardboard cage higher.

[Fifth Device]
In the first to fourth devices described above, in the unfolded sheet, a sandwiching plate is provided before and after the side plate, and a bridging plate and a folded plate are provided before and after the end plate, but as shown in the following fifth device, these positions are provided. The relationship may be reversed.
Even with such a configuration, it is possible to obtain the same operation and effect as the first device.

That is, the assembly type corrugated cardboard cage of the fifth device is
A corrugated cardboard box which is formed by forming V-grooves in the longitudinal and lateral directions of a development sheet made of reinforced corrugated board and folding the development sheet into a box shape along the V-grooves,
A rectangular bottom plate;
A rectangular side plate that is bent substantially vertically by vertical V grooves on the left and right of the bottom plate;
A rectangular end plate that is bent substantially vertically by a lateral V-groove before and after the bottom plate,
The end plate is provided with a clip margin plate that is bent substantially vertically inward by a vertical V-groove and overlaps the inside of the side plate at a position shifted to the center side in the left-right direction by the plate thickness of the spread sheet,
The side plate includes a bridging plate that is bent substantially horizontally inward by a vertical V-groove above the sandwiching plate, and an inner side of the sandwiching plate that is folded substantially vertically downward by a vertical V-groove from the tip of the bridging plate. And a folded plate that overlaps with each other.

The assembly type corrugated cardboard cage of the first to fifth devices can be applied to a corrugated cardboard cage that bends a development sheet made of reinforced corrugated cardboard into a box shape along the V-groove. Usually, it is assumed that the present invention is applied to the main body side of the main body and the lid of the corrugated cardboard basket. However, when the lid is box-shaped, the present invention is applied to the lid of the corrugated cardboard basket. May be applied.
There are no particular limitations on the use (such as for humans and pets) and the type (such as sleeping robes and seats) of cardboard baskets.

  The first to fifth devices may be applied alone as necessary, or may be applied in combination of these devices. Moreover, you may combine the other idea described in this specification.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the present embodiment, the present invention is applied to a main body of a cardboard box.

[First Embodiment]
As shown in FIG. 1, the corrugated cardboard basket 10 includes a bag body 12 and a lid 13. A lid 13 is placed above the bag main body 12. A window 14 is provided at a position near the front of the lid 13. By opening the door of this window 14, the inside of the bag can be seen.
The dimensions of the corrugated cardboard basket 10 are, for example, about 170 to 200 cm in length, about 50 to 70 cm in width, and about 40 to 50 cm in height including the bag main body 12 and the lid 13.

The bag main body 12 and the lid 13 are formed of a reinforced corrugated board. As the reinforced corrugated board, for example, a three-layer reinforced corrugated board material (for example, manufactured by Triwall) having a thickness of about 10 to 20 mm is employed. As shown in the R-part enlarged view of FIG. 2, the reinforced corrugated board has three layers of corrugated plates r1 to r3 interposed between two thick plates (liners) Rb and Rf via partition plates r4 and r5. It is laminated. Since the thick plates (liners) Rb and Rf are reinforced with a resin material, the pressure resistance and water resistance of the reinforced corrugated board are increased.
V-groove processing for bending is performed by cutting one of these layers using a rotary blade or the like while leaving one of the thick plates Rf and Rb. When the corrugated board is bent, only the remaining one thick board (liner) is bent, and the inclined groove surfaces of the V groove are brought into close contact with each other. If V-groove processing is performed so that the groove angle of the V-groove is approximately 90 °, adjacent plates bend substantially vertically. As another V-groove forming method, the corrugated board may be compressed into a V-shaped cross section by a press machine or the like.

  A decorative sheet such as a cloth or a film is affixed to the surface of the cardboard box 10 as necessary. By applying such a cosmetic finish, the texture of the corrugated cardboard 10 is enhanced.

  As shown in FIG. 1, the main body 12 includes a bottom plate 12A, side plates 12B and 12B facing the left and right of the bottom plate 12A, and end plates 12C and 12C facing the front and rear of the bottom plate 12A. On the upper side of the side plates 12B, 12B, a reinforcing frame plate 12D is folded inward with a constant plate width (see FIG. 2). A flat lid 13 is placed almost horizontally on the horizontal upper end surface of the bag main body 12.

  An unfolding sheet P1 for assembling the bag main body 12 is shown in FIG. FIG. 3 shows the front side portion of the spread sheet P1, but the rear side has a similar structure.

As shown in FIG. 3, the unfolded sheet P1 is provided with side plates 12B and 12B on the left and right sides of the rectangular bottom plate 12A, and with end plates 12C before and after the bottom plate 12A. Vertical V grooves y1 and y1 are formed at the boundary between the bottom plate 12A and the side plates 12B and 12B. A lateral V-groove x1 is formed at the boundary between the bottom plate 12A and the end plate 12C.
Before and after the side plates 12B and 12B, sandwiching margin plates 12E and 12E are provided with a lateral V-groove x2. The sandwiching margin plates 12E and 12E basically have a rectangular plate surface, and extend in the front-rear direction (up and down in FIG. 3) with a length approximately half of the width of the left and right plates of the end plate 12C.

  As shown in FIG. 4, the lateral V groove x2 of the clamping margin plate 12E is set at a position displaced inward by the thickness d of the spread sheet P1 from the lateral V groove x1 of the end plate 12A. Accordingly, when the clamping margin plate 12E is bent vertically at the lateral V groove x2, the outer side surface of the clamping margin plate 12E comes to the plate surface tip position L of the bottom plate 12A. Thereby, even if the plate | board thickness of the expansion | deployment sheet | seat P1 is large, the clamping margin board 12E and the end plate 12A stand up to the position which overlapped front and back, without mutually interfering.

  As shown in FIG. 3, the puzzle piece piece 12p and the puzzle piece fitting part 12h are provided in the front-end | tip part of the clamping margin plates 12E and 12E. The puzzle piece piece 12p extends from the tip end of one pinch allowance plate 12E and fits into the puzzle piece fitting portion 12h cut out at the tip end of the other pinch allowance plate 12E (see FIGS. 6 and 8). The vicinity of the base of the puzzle piece piece 12p and the puzzle piece fitting portion 12h is constricted inwardly from both ends, and these constricted portions are hooked to maintain the engaged state of both.

  Before and after the end plates 12A and 12A, cross-linking plates 12F and 12G are provided with a lateral V-groove x3 and x4 therebetween. The width in the left-right direction in FIG. 3 of the bridge plate 12F and the folded plate 12G is equal to the end plate 12A. The length in the front-rear direction of the bridging plate 12F is substantially equal to the thickness of the developed sheet P1, and the length in the front-rear direction of the folded plate 12G is set to be shorter than the end plate 12A by the thickness of the developed sheet P1.

  Frame plates 12D are folded back at the left and right ends of the unfolded sheet P1 by W grooves (grooves formed by arranging V grooves cut at approximately 90 ° in parallel in two rows) (see FIG. 3). The frame plate 12D reinforces the opening end portion of the bag main body 12.

When assembling the bag body 12, for example, as shown in FIG. 5, first, the side plates 12B and 12B are bent substantially vertically along the vertical V grooves y1 and y1 (see FIG. 3) on the left and right sides of the bottom plate 12A. At this time, the sandwiching margin plates 12E and 12E are kept vertical before and after the side plates 12B and 12B.
Next, these clamping strips 12E, 12E are bent substantially vertically into a kannon door shape along the lateral V-groove x2, and these tips are butted. At this time, as shown in FIG. 6, by inserting the puzzle piece piece 12p into the puzzle piece fitting portion 12h, the sandwiching margin plates 12E and 12E are temporarily fixed on the same plane.

  After the sandwiching margin plates 12E and 12E are bent before and after the bottom plate 12A, as shown in FIG. 7, the end plate 12C is bent along the horizontal V-groove x1 and raised upward, and the bridging plate 12F is set to the horizontal V-groove x3 at its tip. And the folded plate 12G is bent inward at the front end thereof by the lateral V-groove x4. Then, as shown in FIG. 9, each plate is folded into a U-shaped cross section so as to embrace the sandwiching margin plate 12 </ b> E, and the plate surfaces are brought into close contact with each other and fixed with an adhesive, an adhesive tape, or the like. And the contact part of another board is also fixed with an adhesive agent, an adhesive tape, etc. as needed. Specifically, the vertical V groove y1, the horizontal V grooves x1 to x4, the fixed portions of the W groove, the fixed portion of the puzzle piece piece 12p and the puzzle piece fitting portion 12h, the fixed portion of the frame plate 12D, and the like are also bonded. It is desirable to reinforce with an agent, adhesive tape or the like.

  The folding order of the unfolding sheet P1 is not limited to the above, and the sandwiching plate 12E may be folded before the side plates 12B and 12B. As long as the unfolded sheet P1 can be folded into the box shape shown in FIG.

Here, as shown in FIG. 6, a recessed groove portion 12 s is formed at the upper end portion of the clamping margin plates 12 </ b> E and 12 </ b> E in the temporarily fixed state. The concave groove portion 12s has a width substantially equal to the width of the end plate 12C and is formed at a level difference equal to the thickness of the spread sheet P1 from the upper end of the side plates 12B and 12B.
As a result, when the bridging plate 12F is bridged over the sandwiching margin plates 12E and 12E, the bridging plate 12F is fitted into the groove 12s so that there is no step at the boundary between the end plate 12C and the side plates 12B and 12B. End faces are evenly aligned. Then, the lid 13 can be stably placed on the upper end of the bag main body 12 in a horizontal state.

  As described above, according to the corrugated cardboard cage 10, the plate surfaces of the end plate 12C, the bridging plate 12F, and the folded plate 12G can be brought into wide contact with the sandwiching margin plate 12E that is bent at the tip of the side plate 12B. For this reason, the fixing strength of each plate can be increased and the load bearing ability of the corrugated board bag 10 can be greatly improved.

  Further, according to the corrugated cardboard cage 10, in addition to the bottom plate 12A, the side plate 12B, and the end plate 12C, the sandwiching plate 12E, the bridging plate 12F, and the folded plate 12G can be formed as a single development sheet (one sheet). It becomes possible to manufacture the corrugated cardboard cage 10 efficiently at a low cost. Further, the corrugated cardboard trough 10 with good dimensional accuracy can be easily assembled only by bending the spread sheet P1 along the vertical V-groove y1 and the horizontal V-grooves x1 to x4.

  Further, in the corrugated cardboard cage 10, the sandwiching margin plates 12E and 12E are located at the center of the bottom plate 12A in the longitudinal direction of the bottom plate 12A with respect to the center plate 12A in the longitudinal direction, so that each plate is obstructed by these bent portions. I don't get along. For this reason, even if the plate | board thickness of the expansion | deployment sheet | seat P1 is large, the operation | work of bending and fixing with the pinching margin plates 12E and 12E and the end plate 12A can be performed easily and smoothly.

Next, a method for folding the spread sheet P1 will be described.
When the unfolded sheet P1 is folded and stored or transported, the unfolded sheet P1 is made compact by folding each plate on the side opposite to that during assembly.

  In this case, for example, as shown in FIG. 3, a folding cut K is provided at the position of the two-dot chain line in FIG. 3 on one side of the left and right side plates 12B and 12B and the clamping margin plates 12E and 12E. Put in. The cut K is continuous from the side edge of the bottom plate 12A on a straight line in the front-rear direction while maintaining a predetermined interval of the developing sheet P1 (a width of two or more sheets of the developing sheet P1). Similarly to the V grooves of the unfolding sheet P1, the other layers are cut planarly with a cutter or the like while leaving the lowermost liner layer (see reference numeral Rf in FIG. 2).

  FIG. 10 is a cross-sectional view for explaining the process of folding the unfolded sheet P1, FIGS. 10A and 10C are cross-sectional views of the unfolded sheet P1, and FIG. 10B is the vicinity of the end plate of the unfolded sheet P1. It is a partial longitudinal cross-sectional view. In FIG. 10A, the side plates 12B and 12B are drawn vertically in order to make the structure of the spread sheet P1 easy to understand.

  When the unfolding sheet P1 is folded, as shown by an arrow a in FIG. 10A, first, the right side plate 12B is folded outwardly and overlapped on the lower side of the bottom plate 12A, and at the same time, the sandwiching margin plates 12E before and after the side plate 12B. Is folded outward and folded over the lower side of the end plate 12C (see FIG. 10B).

  Next, as shown by an arrow b in FIG. 10B, the end plate 12C, the bridging plate 12F, and the folded plate 12G are folded back outwardly along the lateral V-grooves x3 and x4 to form a U-shaped cross section. The folded plate 12G is stacked under the plate 12E.

  In this state, as shown by an arrow c in FIG. 10C, the left side plate 12B having the cut K is folded back into a U-shaped cross section by the vertical V groove y1 and the cut K. Then, the clamping margin plates 12E before and after the side plate 12B overlap the lower side of the above-described folded plate 12G (see FIG. 10C).

  In this way, the cut sheet K is formed at a position spaced apart from the side edge of the bottom plate 12A by a predetermined distance in the spread sheet P1, so that the four spread sheets P1 can be obtained without obstructing the clamping margin plate 12E and the folding plate 12G. It can be folded compactly over the plate thickness. Thereby, handling, such as storage and conveyance of the expansion | deployment sheet | seat P1, can be made easy.

[Second Embodiment]
Next, a second embodiment of the present invention is shown in FIGS.
In the corrugated cardboard cage 20 of the second embodiment, sandwiching margin plates 12E, 12E are provided on the left and right sides of the end plate 12C, and a bridging plate 12F and a folding plate 12G are provided on the left and right sides of the side plates 12B, 12B.

  As shown in FIG. 11, the unfolding sheet P2 of the cardboard box 20 is provided with side plates 12B and 12B with a vertical V groove y1 on the left and right sides of the bottom plate 12A. A front plate 12C is provided before and after the bottom plate 12A with a lateral V-groove x1 therebetween.

  Tongue plates 12E and 12E in the form of tongue plates are provided on the left and right sides of the end plate 12C with a vertical V groove y2 therebetween. The vertical V-groove y2 is located at a position shifted inward by the thickness of the development sheet P2 from the vertical V-groove y1, so that the sandwiching margin plates 12E and 12E are equal to the thickness of the development sheet P2 than the side plates 12B and 12B. It will be bent only at the center in the left-right direction.

  A bridging plate 12F and a folded plate 12G are provided on the left and right sides of the side plates 12B and 12B with vertical V grooves y3 and y4, respectively. The bridging plate 12F has a width corresponding to the plate thickness of the spread sheet P2, and the folded plate 12G is shorter than the left and right plate widths of the side plates 12B by the plate thickness of the spread sheet P2.

When assembling the corrugated cardboard cage 20, for example, as shown in FIG. 12, the side plates 12B and 12B are raised on the left and right sides of the bottom plate 12A, and the bridging plate 12F and the folded plate 12G are bent into a U-shaped cross section. At this time, since the lower end of the folded plate 12G is shorter than the height of the side plate 12B by one plate thickness, the folded plate 12G is placed on the plate surface of the bottom plate 12A.
Next, the frame plate 12D is turned back 180 ° along the W groove x5 (see FIG. 11) before and after the end plate 12C, and the left and right sandwiching plates 12E and 12E are raised almost vertically, and the side plate 12B, the bridge plate 12F and the turnup are turned up. While being inserted into a rectangular space surrounded by the plate 12G, it rises to a position that is substantially vertical (see FIG. 13).

According to the corrugated cardboard cage 20 of the second embodiment, the left and right sandwiching margin plates 12E, 12E of the end plate 12C can be brought into contact with the plate surfaces of the side plate 12B, the bridge plate 12F, and the folded plate 12G in a wide range. For this reason, the load resistance of the corrugated paper bag 20 can be improved by fixing these contact portions with an adhesive, an adhesive tape, or the like.
Further, since each plate is formed on a single spread sheet P2, the corrugated board 20 can be assembled easily and accurately.
Furthermore, the folding position of the clamping margin plate 12E is set so as to be shifted from the side plate 12B to the center side in the left-right direction of the bottom plate 12A by the thickness of the development sheet P2, so that even if the thickness of the development sheet P2 is large, The side plate 12B and the sandwiching margin plate 12E can be kept vertical by being overlapped in the left-right direction, and it is possible to facilitate the folding operation of the spread sheet P2.

[Modification]
The first and second embodiments have been described above, but the embodiments of the present invention are not limited to these, and may be accompanied by various modifications and changes as described below.
For example, as shown in FIGS. 9A and 9B, an inner bottom plate J having a shape substantially equal to the plate surface of the bottom plate 12 </ b> A may be dropped inside the bag main body 12. In such a configuration, the front end of the folded plate 12G can be stopped at the front-rear direction front end of the inner bottom plate J to prevent upward jumping. For this reason, it becomes possible to firmly fix the box shape of the bag main body 12 without using an adhesive, an adhesive tape, or the like.
As other forms, in the first and second embodiments, the frame plate 12D is not necessarily provided, and may be omitted as necessary.
In the first and second embodiments, the present invention is applied to the bag main body 12, but the present invention may be applied to the lid 13 when the lid 13 is box-shaped.
Further, the corrugated cardboard material for producing the spread sheets P1 and P2 is not limited to the three-layer reinforced corrugated cardboard, and other multi-layer corrugated cardboard materials, corrugated cardboard materials having a honeycomb structure, or the like may be used.

It is a perspective view which shows the corrugated board bag of 1st Embodiment of this invention. FIG. 2 is a cross-sectional view taken along line [2]-[2] in FIG. 1 and an enlarged cross-sectional view of an R portion, showing the corrugated cardboard cage. It is the fragmentary top view which shows the expansion | deployment sheet | seat for assembling the bag main body of the corrugated board bag, and the end elevation of the broken line direction. FIG. 4 is an enlarged plan view showing a Q portion in FIG. 3 and an end view in a broken line direction thereof. It is a perspective view which shows the assembly procedure of the same coffin main body, and shows a mode that the side plate and the pinch | interposing margin board were stood up and faced. FIG. 9 is a perspective view illustrating a procedure for assembling the cochlear main body and showing a state where a pinching margin plate is bent inward and temporarily fixed. It is a perspective view which shows the assembly procedure of the same coffin main body, and shows a mode that the end plate, the bridge | crosslinking board, and the folding | turning board are bent and it overlaps | stacks on a pinching board. It is the front view which looked at the same coffin main body from the front side. 8A and 8B show a cross-sectional structure of the main body of the coffin main body, in which FIG. 8A is a partial cross-sectional view in the direction of [9A]-[9A], and FIG. FIG. FIGS. 10A and 10C are cross-sectional views of the unfolded sheet P, and FIG. 10B is a partial vertical cross-sectional view of the unfolded sheet P1 near the end plate. It is. The 2nd Embodiment of this invention is shown and it is a fragmentary top view which shows the expansion | deployment sheet | seat for assembling a corrugated cardboard basket. FIG. 10 is a perspective view illustrating a procedure for assembling the cochlear main body, and showing a state before inserting a clamp plate into a rectangular space surrounded by a side plate, a bridge plate, and a folded plate. It is a perspective view which shows the assembly procedure of the coffin main body, and shows a mode after inserting a pinching margin board in the rectangular space enclosed by a side board, a bridge | crosslinking board, and a folding | turning board. It is a perspective view which shows the conventional cardboard bag. It is the top view and end view of a broken line direction which show the expansion | deployment sheet | seat for assembling the bag main body of the corrugated board bag.

Explanation of symbols

10, 20 Corrugated cardboard box 12 Bag body 13 Lid 14 Window frame 12A Bottom plate 12B, 12B Side plate 12C Side plate 12D Frame plate 12E Clamping plate 12F Bridge plate 12G Folding plate 12p Puzzle piece piece 12h Puzzle piece fitting portion 12s Concave groove portion P1, P2 Deployment sheet x1 to x4 Horizontal V groove y1 to y4 Vertical V groove

Claims (5)

A corrugated cardboard box in which V-shaped grooves are formed in the longitudinal and lateral directions of a development sheet made of a reinforced corrugated board, and the development sheet is folded into a box shape along the V-grooves.
A rectangular bottom plate;
A rectangular side plate that is bent substantially vertically by a vertical V-groove on the left and right of the bottom plate;
A rectangular twill plate that is bent substantially vertically by a lateral V-groove before and after the bottom plate,
The side plate has a pinch margin that is bent substantially vertically inward by a lateral V-groove and overlaps the inside of the end plate at a position shifted to the center side in the front-rear direction of the bottom plate by the thickness of the spread sheet from the end plate. A board is provided,
On the end plate, a bridging plate that is bent substantially horizontally inward by a lateral V-groove above the pinch plate, and an inner side of the pinch plate that is bent substantially vertically downward by a horizontal V-groove from the tip of the bridging plate. An assembly-type corrugated cardboard bag, characterized in that a folding plate is provided on top of the other.   2. A concave groove portion is provided at an upper end of the sandwiching margin plate to receive the bridge plate with a step substantially equal to the width of the end plate and from the upper end of the side plate with a step substantially equal to the plate thickness of the spread sheet. Assembling-type corrugated cardboard box described.   The clamping margin plates are configured to be bent substantially vertically inwardly at the distal ends of the left and right side plates, and the distal ends thereof are adjacent to each other. A puzzle piece piece projecting continuously from the plate surface and a puzzle piece fitting portion that is opened by being cut out in the plate surface of the other sandwiching plate and is fitted to the puzzle piece piece. 2. An assembly type corrugated cardboard box according to 2.   The unfolded sheet is provided with folding cuts that are continuous on a straight line in the front-rear direction at a predetermined distance from the side edge of the bottom plate on the plate surface of the side plate on either one of the left and right sides and the sandwiching plate. The assembled cardboard box according to any one of claims 1 to 3. A corrugated cardboard box in which V-shaped grooves are formed in the longitudinal and lateral directions of a development sheet made of a reinforced corrugated board, and the development sheet is folded into a box shape along the V-grooves.
A rectangular bottom plate;
A rectangular side plate that is bent substantially vertically by vertical V grooves on the left and right of the bottom plate;
A rectangular end plate that is bent substantially vertically by a lateral V-shaped groove before and after the bottom plate,
The end plate is provided with a clip margin plate that is bent substantially vertically inward by a vertical V-groove and overlaps the inside of the side plate at a position shifted to the center side in the left-right direction by the plate thickness of the spread sheet,
The side plate includes a bridging plate that is bent substantially horizontally inward by a vertical V-groove above the sandwiching plate, and an inner side of the sandwiching plate that is folded substantially vertically downward by a vertical V-groove from the tip of the bridging plate. An assembly-type corrugated cardboard bag, characterized in that a folding plate is provided on top of the other.

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