JP2002012214A - Setup packaging box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging box wherein coupling between front and rear side plates and right and left side plates can be kept rigid even if a widthwise dimension of a beam plate is relatively small, and wherein as the widthwise dimension of the beam plate can be relatively small, it is easy to put in/out an object to be packaged and a material cost of a corrugated fiberboard can be reduced. SOLUTION: External side plates 4 and internal side plates 5 are overlaid and made to stand on the left and the right of a base plate 3. Side plates 8 are made to stand on the front and rear sides of the base plate 3. The beam plate 9 connected with the front and rear sides plates 8 is folded horizontally, and locking pieces 10 at both ends of the beam plate 9 are inserted into and locked with locking holes 21 between the external side plate 4 and the internal side plate 5. A protrusion 12 is provided on a first tab connected with the external side plate 4 or on a second tab connected with the internal side plate 5, and the protrusion 12 is inserted into an insertion hole 13 formed on the beam plate 9 for hooking.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an assembled packaging box, and more particularly to a packaging box formed by assembling corrugated paperboard into a tray.

[0002]

2. Description of the Related Art Conventionally, tray-shaped packaging boxes for packaging vegetables and fruits at the time of shipping have been known. This type of packaging box
As seen in Japanese Patent Application Laid-Open No. 49-121929, it is formed by assembling corrugated paperboard punched into a predetermined shape. This type of packaging box is sometimes called a box with a crosspiece, and is provided with a pair of crosspieces that are horizontally bent inward from the front ends of the front and rear side plates facing each other in the front and rear direction. The crosspiece locks the left and right side plates by inserting locking pieces provided on both sides thereof into upper edges of the left and right side plates that are double-turned to face each other in the left-right direction. Thus, the left and right side plates are prevented from falling down, and the front and rear side plates and the left and right side plates are firmly connected, so that the assembled state of the packaging box is reliably maintained. Note that the left and right side plates have a double configuration to improve buckling strength when a plurality of packaging boxes are stacked.

[0003] However, the crossboard provided in this type of packaging box preferably has a relatively large width in order to surely maintain the tray shape of the packaging box, but the crossboard has a large width. In addition, since the open upper part of the packaging box is partially covered by the crosspiece, there is an inconvenience that it prevents smooth loading and unloading of items to be packaged such as vegetables and fruits. Further, when a crosspiece having a relatively large width is provided, there is a disadvantage that the use area of the corrugated cardboard material becomes large and the cost increases.

[0004] Further, if the width of the crosspiece is formed relatively small to give priority to smooth loading and unloading of the articles to be packaged and reduction of material costs, the connecting position of the locking piece is changed to the base end of the crosspiece. Close to. For this reason, the locking pieces are locked at the corners of the left and right side plates (positions close to the front and rear side plates), and the connection strength between the front and rear side plates and the left and right side plates is reduced, so that the tray of the packaging box is reduced. There is a disadvantage that it is difficult to reliably maintain the shape.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned inconvenience, the present invention can maintain the connection between the front and rear side plates and the left and right side plates firmly even if the width of the crossboard is relatively small. It is an object of the present invention to provide a packaging box which can facilitate the taking in and out of the packaged object and reduce the material cost of the corrugated cardboard by making the width of the crossboard relatively small. .

[0006]

In order to achieve the above object, the assembled packaging box of the present invention is assembled in a tray shape by bending each part along a fold line. That is, first, a pair of left and right outer plates continuously provided along the fold lines along the left and right side edges of the rectangular bottom plate are erected. Next, each of the inner plates connected continuously along the fold line along the leading edge of each of the outer plates is folded inside the outer plate and polymerized. Subsequently, a first tongue piece connected to the front and rear side edges of each of the left and right outer plates via a fold line, and a second tongue connected to the front and rear side edges of each of the inner plates via the fold line. The pieces are bent inward at right angles along the front and rear side edges of the bottom plate. Next, a pair of front and rear side plates continuously provided along the front and rear side edges of the bottom plate via a fold line are overlapped on the outside of the first tongue to be erected. Then, each crosspiece connected continuously along the leading edge of each of the front and rear side plates via a fold line is horizontally bent inward. At this time, a pair of locking pieces continuously provided at the left and right edges of each crossboard via a fold line were bent at right angles to the crossboard and formed between the outer plate and the inner plate. Insert into the locking hole and lock. Further, with the bending of each crosspiece, the first
A projection formed on the upper edge of the tongue piece or the upper edge of the second tongue piece is inserted into an insertion hole formed at a position corresponding to the projection on the base end of the crosspiece, and each projection is formed. A hook claw provided on one side edge is hooked on the inner edge of the insertion hole.

In the packaging box of the present invention assembled as described above, not only the outer plate and the front and rear side plates are connected and held by the locking piece of the crosspiece, but also the projecting piece is hooked on the insertion hole. By being stopped, the outer plate and the front and rear side plates are connected and held via the crosspiece. Thereby, even if the holding force of the retaining piece of the crosspiece is relatively small, the holding force can be sufficiently supplemented by the hook of the projecting piece to the insertion hole. Therefore, the width of the crossboard is set relatively small, and the tray shape of the packaging box is firmly maintained even if the position where the outer plate is hooked by the locking pieces is at the front and rear ends of the outer plate. can do. In addition, since the width of the crosspiece can be provided relatively small as described above, the articles to be packaged can be smoothly taken in and out. Further, by making the width of the crossboard relatively small, there is no waste in the punched shape of the corrugated cardboard material, so that the material cost of corrugated cardboard can be reduced.

In the present invention, it is preferable that an insertion hole is provided along the front and rear side edges of the bottom plate so that the projection can be freely inserted when another packaging box is stacked.

According to the present invention, since the protruding pieces project upward through the insertion holes formed in the crosspiece, the insertion holes are provided in the bottom plate so that a plurality of packaging boxes can be stacked. By inserting the protruding pieces into the insertion holes, the stacked state of the packaging boxes can be reliably maintained.

[0010]

An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an explanatory perspective view showing an assembled state of the packaging box of the embodiment, FIG. 2 is an exploded view of the packaging box of FIG. 1, and FIG. 3 is an explanatory view showing an assembly process of the packaging box of the embodiment.

The assembled packaging box 1 of the present embodiment is generally called a box with a bar, and as shown in FIG. 1, is assembled in a tray shape and wraps vegetables and fruits (not shown) at the time of shipping. is there.

As shown in FIG. 2, the packaging box 1 is assembled from a corrugated paperboard 2 formed by punching. The corrugated paperboard 2 is formed bilaterally symmetric and longitudinally symmetric as shown in the figure. That is, a rectangular bottom plate 3 is provided, and a pair of left and right side plates 4 (outer plates) are connected to left and right side edges of the bottom plate 3 via a fold line a. An inner side plate 5 is continuously provided at a leading edge of the left and right side plates 4 through a pair of parallel fold lines b and c. A pair of first tongue pieces 6 are continuously provided on the front and rear side edges of the left and right plates 4 via a fold line d.
A pair of second tongue pieces 7 are connected to each other at the front and rear side edges via a fold line e.

Further, a pair of front and rear side plates 8 are connected to the front and rear side edges of the bottom plate 3 via a fold line f. A crossboard 9 is continuously provided at the leading edge of the front and rear side plates 8 via a fold line g. A pair of locking pieces 10 are connected to the left and right edges of the cross board 9 via a fold line h.

A pair of notches 11 are formed near the first tongue 6 of the left and right side plates 4. The notch 11 is formed at the insertion position of the locking piece 10 when assembling the packaging box 1 into the shape shown in FIG.

Further, a protruding piece 12 is formed at one end of the second tongue piece 7. When the packaging box 1 shown in FIG. 1 is assembled, the protruding pieces 12 are inserted into insertion holes 13 provided along the fold lines g of the crossboard 9. The protruding piece 12
Is formed with a hooking claw 14 which is hooked on the inner edge of the insertion hole 13 when inserted into the insertion hole 13.

A first insertion hole 15 is formed in the bottom plate 3 at a central portion along each fold line a on the left and right side edges, and a pair of second insertion holes 15 are formed along each fold line f on the front and rear side edges. An insertion hole 16 is formed. Further, third insertion holes 1 are provided at four corners of the bottom plate 3.
7 are formed. When the packaging boxes 1 shown in FIG. 1 are stacked, the first projections 18 that stand integrally with the left and right side plates 4 are inserted into the first insertion holes 15 between the left and right side plates 4 and the inner plate 5. In addition, a second projection 19 projecting toward the bottom plate 3 is provided so as to be inserted and engaged when the inner plate 5 is folded. The second insertion hole 16 is a protruding piece of the second tongue piece 7 projecting onto the rail 9 through the insertion hole 13 of the rail 9 when the packaging boxes 1 shown in FIG. 12 are provided so as to be inserted and engaged. The third insertion hole 17
Are provided so that the third projections 20 provided on the inner plate 5 projecting toward the bottom plate 3 and the second tongue piece 7 when the inner plate 5 is folded are engaged.

Next, a process of assembling the packaging box 1 having the above configuration will be described with reference to FIG. Although the front half of the packaging box 1 is shown in FIG. 3, the rear half is assembled in the same manner. First, as shown in FIG. 3A, the left and right side plates 4 are bent and erected along the fold line a. At this time, the inner plate 5 is raised together with the left and right side plates 4.

Next, as shown in FIG. 3B, the inner plate 5 is folded inward through the fold lines b and c. At this time, although not shown in FIG. 3B, as described above, the second protrusion 19 is engaged with the first insertion hole 15 shown in FIG. As a result, as shown in FIG.
The inner plate 5 and the inner plate 5 overlap each other to form an engaging hole 21 that is continuous with the notch 11 at the upper edge of the left and right side plates 4. The locking holes 21 are used to insert and lock the locking pieces 10 provided on the crosspiece 9 as described later.

Subsequently, as shown in FIG. 3C, both the first tongue piece 6 and the second tongue piece 7 are bent inward at right angles through the fold lines d and e. At this time, although not shown in FIG. 3C, the third protrusion 20 is engaged with the third insertion hole 17 shown in FIG. 2 as described above. Accordingly, the protruding piece 12 provided on the second tongue piece 7 projects upward and is positioned on the front and rear side plate 8 side.

Next, as shown in FIG. 3D, the front and rear side plates 8 are bent and erected along the fold line f. And
The crosspiece 9 is bent inward through the fold line g so as to be horizontal. At this time, the locking piece 1 connected to the
0 is bent through the fold line h and inserted into the locking hole 21 by the guide of the notch 11. Also, when the crosspiece 9 is bent, the protruding piece 12 provided on the second tongue piece 7 is used.
Is inserted into the insertion hole 13 of the crosspiece 9, and when the crosspiece 9 is horizontal, as shown in FIG.
4 is hooked on the inner edge of the insertion hole 13.

As shown in FIG. 1, the packaging box 1 thus formed is in a state in which the left and right side plates 4 and the front and rear side plates 8 are connected and held via the locking pieces 10 of the crossboard 9. Furthermore,
The left and right side plates 4 are reliably connected and held to the crossboard 9 via the second tongues 7 by the protrusions 12 being hooked into the insertion holes 13.

According to such a structure, as shown in FIGS. 1 and 2, the width dimension x of the crosspiece 9 is relatively small, and the locking pieces 10 lock both ends of the left and right side plates 4. Even
The connection between the left and right side plates 4 and the front and rear side plates 8 can be firmly maintained by the holding force of the projecting pieces 12 in addition to the holding force of the left and right side plates 4 by the locking pieces 10 of the crossboard 9.
In addition, since the width dimension x of the crossboard 9 can be made relatively small, it is possible to easily put and take out articles to be packaged such as vegetables and fruits, and to further reduce the material cost of the corrugated paperboard 2. it can.

Further, since the protruding pieces 12 protrude above the cross board 9, when stacking the packaging boxes 1, the second insertion holes 1
The upper and lower packaging boxes 1 can be easily connected to each other by inserting the protruding pieces 12 into the 6 and a stable stacked state can be obtained.

In this embodiment, the projection 1
Although the example in which 2 is provided on the second tongue piece 7 is shown, the protruding piece 12 is provided on one side (the side forming the upper edge) of the tip end of the first tongue piece 6, although not shown. You may.

[Brief description of the drawings]

FIG. 1 is an explanatory perspective view showing an assembled state of a packaging box according to an embodiment of the present invention.

FIG. 2 is a development view of the packaging box of FIG. 1;

FIG. 3 is an explanatory view showing an assembling process of the packaging box of the embodiment.

[Explanation of symbols]

1 ... packaging box, 3 ... bottom plate, 4 ... left and right side plates (outer plate), 5 ...
Inside plate, 6 first tongue piece, 7 second tongue piece, 8 front and rear side plates (front and rear side plates), 9 crosspiece, 10 locking pieces, 12 projection pieces, 13 insertion holes, 14 Hook claws, 16 insertion holes, 21
... locking holes.

Claims (2)

[Claims] 1. A pair of left and right outer plates connected to each other along a fold line along the left and right side edges of a rectangular bottom plate are erected, and connected via a fold line along a leading edge of each outer plate. Each of the provided inner plates is folded back to the inside of the outer plate and superimposed, and a first tongue piece continuously connected to a front and rear side edge of each of the left and right outer plates via a fold line, and a front and rear side of each inner plate A second tongue piece connected to the edge via a fold line is bent inward at a right angle along the front and rear side edges of the bottom plate, and is folded along the front and rear side edges of the bottom plate via the fold line A pair of front and rear side plates that are continuously provided are superposed on the outside of the first tongue piece to be erected, and each crosspiece that is continuously provided along a leading edge of each of the front and rear side plates via a fold line is inward. In addition to being bent horizontally, a pair of locking pieces connected to the left and right edges of each crosspiece through a fold line are bent at right angles to the crosspiece to form the outer plate and the inner plate. The first tongue is formed at the upper edge of the first tongue or the upper edge of the second tongue at the time of bending of each crosspiece. The protruding pieces are inserted into insertion holes formed at positions corresponding to the protruding pieces at the base end of the crosspiece, and the hooking claws provided on the side edges of each protruding piece are inserted into the inner edges of the insertion holes. An assembled packaging box characterized by being hooked. 2. An insertion hole along the front and rear side edges of the bottom plate, the insertion hole being provided so that the protruding piece can be freely inserted when another packaging box is stacked. Assembled packaging box.