JP6410248B1 - Assembled cardboard box - Google Patents

Abstract

The present invention relates to a corrugated cardboard box assembled from a single plank, and an object thereof is to provide an assembling type corrugated cardboard box which can greatly reduce the labor and time required for assembling. In order to achieve the above object, the present invention is formed on the diagonal line of the corner connecting plate that is formed outside the four corners of the bottom plate and connects adjacent side plates. A valley fold line is formed in the first half of the first half, and a notch having a certain width is formed in the second half, and the tip of the notch has an acute angle of 45 degrees. . [Selection] Figure 1

Description

  The present invention relates to an assembly type cardboard box suitable for transporting fruits and vegetables such as strawberries, and relates to a cardboard box assembled from a single punched plank.

  In most cases, harvested fruits and vegetables are shipped after being selected at the fruit selection site, but especially strawberries are very fragile, so special consideration should be given to their transportation method. Cost.

  For this reason, the selected strawberries are packed in a plastic transparent container, and further packed in a cardboard box that can store about four packs, and then shipped by truck or the like with the cardboard boxes stacked in multiple stages.

  Conventionally, many cardboard boxes used for shipping such fruits and vegetables are assembled from planks on a flat plate made of a single cardboard paper in consideration of production cost and convenience of transporting the cardboard box itself. Yes.

  And, the basic structure of such a plank is that a rectangular bottom plate, a pair of front and rear side plates connected to the four sides of the bottom plate, a pair of left and right side plates, and the outer corners of the four corners of the bottom plate. In many cases, the die is cut into a shape having four square corner connecting plates that are connected to adjacent side plates and provided with cuts and valley fold lines at appropriate locations.

  In the assembly, the front and rear side plates and the left and right side plates are raised along the valley fold line, and the corner connecting plate is folded inward at 45 degrees to be assembled in a box shape.

  By the way, in many cases, such cardboard boxes are assembled in the above-described fruit selection field, and in order to select a large amount of fruits and vegetables at the same time, it is necessary to assemble a large number of cardboard boxes in advance.

  However, the corrugated cardboard box assembled from one plank as described above requires a considerable skill in its assembly, and is in a situation where it is difficult to secure skilled workers due to serious labor shortage. It is desirable that even an unfamiliar worker can easily assemble.

  As such a cardboard box for transporting fruits and vegetables assembled from a single plank, for example, Patent Document 1 describes a structure in which folding walls 41 and 42 formed at four corners are preliminarily provided with a crease m7. Has been.

  Further, for example, in Patent Document 2, as in Patent Document 1, a corner connecting plate 13 with a valley fold line 14 and a notch 15 is described.

JP-A-6-56145 JP-A-2006-130135

  By the way, since the plank as described above uses corrugated cardboard, there are many cases in which there is a paper grain that easily bends in either the vertical direction or the horizontal direction. Therefore, when assembling the cardboard box, the connecting portion between the bottom plate and the side plate may be folded along a valley fold line provided in the direction along the paper grain or in the direction perpendicular to the paper grain, and the size of the side plate is also limited. The force is easily controlled because it is a location that is large enough to be easily grasped, and the valley fold line of the portion can be folded relatively easily.

  However, it is necessary to fold the four square corner connecting plates formed outside the corners of the four corners of the bottom plate in a direction at an angle of 45 degrees with respect to the paper pattern. Furthermore, since this part is small in part that can be grasped by hand, it is difficult to control the force, and even if there is a valley fold line in an oblique direction in advance, it is difficult to fold quickly and accurately unless it is a skilled worker.

  In this regard, the ones described in Patent Documents 1 and 2 are considered to be difficult to fold quickly and accurately for the reasons described above, although the corner connecting plate is previously provided with a 45-degree oblique fold line.

  Therefore, the present invention relates to a corrugated cardboard box assembled from one plank as described above, paying attention to the difficulty of folding the corner connecting plates at the four corners as described above, even if the worker is unfamiliar with the work. By adopting a structure that allows easy assembly of parts, it is possible to significantly reduce the labor and time required for assembly, and to provide an assembly-type cardboard box suitable for transporting fruits and vegetables with low manufacturing costs It is said.

In the cardboard box of the present invention, in order to achieve the above object, a pair of front and rear side plates and a pair of left and right sides connected to each other via a quadrilateral bottom plate, four sides of the bottom plate and a valley fold line when viewed from the top surface . A left-hand side plate and four square corner connecting plates that are formed outside the corners of the four corners of the bottom plate and connect adjacent side plates through a valley fold line when viewed from above. A corrugated cardboard box assembled from a plurality of planks, wherein the four corner connecting plates are formed with valley fold lines as viewed from the lower surface in the front half near the corners on the diagonal starting from the corners of the bottom plate In addition, a notch having a parallel width of about 5 millimeters from the diagonal line is formed in the latter half part over the entire length, and the leading end of the notch is formed in an acute angle shape having an angle of about 45 degrees with respect to the diagonal line. Part Connect to valley fold line, one of the front and rear of the front and rear side plates or a pair of right and left side plates, one at least one, via the inward fold line when viewed from the top to the outside of the pair of side plates, the and the side plate It is characterized in that the inner plates of the shape are connected .

  According to the present invention, the valley fold line in the corner connecting plate particularly at the four corners is formed only in the front half near the corner of the corner connecting plate, and the second half is a cut having a certain width. Therefore, the length of the valley fold line is short and can be easily folded with a small force when folded.

  Furthermore, since the front end of the notch has an acute angle of about 45 degrees and is in contact with the valley fold line of the front half, it is easy to make an accurate trigger when folding the corner connecting plate, and it is accurate along the valley fold line. Can be folded into

Still further , at least one of the pair of front and rear side plates or the pair of left and right side plates is located on the outside of the pair of side plates and inside the same shape as the side plate via a valley fold line as viewed from above. Since the plates are connected, the cardboard box can be firmly assembled and the strength of the side plates can be increased.

  As described above, if the assembly type cardboard box of the present invention is used, even a worker unaccustomed to work adopts a structure that can be easily assembled, so that labor and time required for assembly can be greatly reduced. Can do. In addition, it is strong enough to withstand multi-stage loading, so it is particularly suitable for transporting fruits and vegetables on trucks, etc., and manufacturing such excellent cardboard boxes from a single plank. Cost is also low.

Plank development view of an embodiment of the present invention Enlarged view of the corner connecting plate State diagram in the middle of folding the corner connecting plate 1st state figure in the middle of the assembly of the cardboard box which is the embodiment of the present invention Second state diagram Assembly completed drawing

Hereinafter, embodiments of the present invention will be described. First, FIG. 1 is a developed view seen from the upper surface of a plank 1 on a flat plate made of a single cardboard paper used in the assembly type cardboard box of the present invention. Simultaneously with the die cutting, a valley fold line 8 and a notch 9 indicated by dotted lines are also provided at predetermined positions. Further, as described above, the plank 1 has a paper pattern that is easily bent in either the vertical direction or the horizontal direction.

  A square bottom plate 2 corresponding to the bottom after assembly is formed at the center of the plank 1, and when the strawberry pack is to be accommodated, the size of the four strawberry packs should be set. Good.

Further, a pair of front and rear rectangular plates 3 and a pair of left and right side plates 4 corresponding to a side wall after assembly are connected to four sides around the rectangular bottom plate 2 via a valley fold line 8 when viewed from above.

  The front and rear side plates 3 and the left and right side plates 4 constitute the side walls of the corrugated cardboard box by bending upward along the valley fold line 8, so that all the widths thereof must be formed to be equal.

Further, four square corner connecting plates 5 are provided outside the corner portions 7 at the four corners of the bottom plate 2, and each of the corner connecting plates 5 includes the front and rear side plates 3 and the left and right side plates 4. The side plates adjacent to each other are connected to each other via a valley fold line 8 when viewed from above.

As shown in FIG. 2, each of the corner connecting plates 5 is inclined from the lower surface at an angle of 45 degrees to the front half near the corner 7 on the diagonal line XX starting from the corner 7 of the bottom plate 2. A valley fold line 8 is formed, and a notch 9 having a parallel width of about 5 millimeters from the diagonal line XX is formed in the latter half of the diagonal line XX along the entire length thereof .

  Further, the tip portion 10 of the notch 9 positioned substantially at the center of the diagonal line XX is connected to the valley fold line 8 in the first half portion at an acute angle A with respect to the diagonal line XX as shown in FIG. . Note that if the angle A is too large, the start position of the bending is likely to be detached from the tip portion 10, so that it is difficult to bend accurately along the valley fold line 8. If the angle is too small, the thickness of the corrugated cardboard will interfere with the wrinkle, and the valley fold line 8 will be easily cut from the position of the tip 10. Can be included. In order to exert such a function, although it is not necessary to adjust to an accurate 45 degrees, it is necessary to keep at least 45 degrees ± 5 degrees, that is, within a range of 40 degrees to 50 degrees.

Further, in FIG. 1, inner plates 6 having the same shape as the left and right side plates 4 are connected to the outside of the pair of left and right side plates 4 via valley fold lines 8 as viewed from above. The inner plate 6 is not limited to the left and right side plates 4 and may be connected to the front and rear side plates 3, but at least one of the pair of front and rear side plates 3 and the pair of left and right side plates 4. Just connect them.

  When the inner plate 6 is connected to the inner side of the cardboard box along the valley fold line 8 by connecting the inner plate 6, the side wall of the portion becomes a double structure and the strength of the side wall can be increased.

  Further, as shown in FIG. 5, the inner plate 6 has a structure in which the inner plate 6 is folded from above so as to wrap the corner connecting plate 5 folded in a right triangle along the diagonal line. The corner connecting plate 5 can be firmly fixed.

  At that time, as shown in FIG. 1, a small protrusion-like insertion piece 11 is formed at the center of the tip of the inner plate 6, and a valley fold line 8 where the left and right side plates 4 and the bottom plate 2 are connected. It is also possible to prevent the inner plate 6 from coming off by forming the insertion hole 12 into which the insertion piece 11 is inserted in the vicinity of the center portion of the inner plate 6.

Also by Rukoto provided inside plate 6, between the inner plate 6 right and left side plates 4, since the structure of sandwiching the corner portion connecting portion 5 with an increased folded is in thick double, as shown in FIG. 1 The valley fold line 8 that connects the inner plate 6 and the left and right side plates 4 may be formed in a double manner.

  Finally, in order to deepen the understanding of how the cardboard box of the present invention can be easily and accurately assembled, a specific description will be given of how to assemble the cardboard box of the present invention.

  As described above, the corrugated cardboard box of the present invention is assembled from a single plank 1 that has been die-cut as shown in FIG. It is bent in the front-rear and left-right directions along the valley fold line 8 formed around the bottom plate 2. At this time, it is preferable that the valley fold line 8 where the inner plate 6 is connected to the side plate is also bent in advance.

  By this bending operation, bending ridges are provided so that the pair of front and rear side plates 3 and left and right side plates 4 can be easily raised upward, and the valley fold line 8 in contact with the periphery of the corner connecting plate 5 is also bent at the same time. Therefore, this part also has a bending fold.

  Next, it is necessary to fold the corner connecting plate 5 along a diagonal line starting from the corner 7 of the bottom plate 2. As described above, the folding of this portion folds in an oblique direction of 45 degrees with respect to the cardboard paper pattern, and the portion that can be grasped by hand is small, making it difficult to apply force. However, it is difficult to fold correctly according to the valley fold line, such as creases at unintended locations.

However, in the plank 1 of the present invention, as shown in FIG. 2, a valley fold line 8 is formed in the front half near the corner 7 on the diagonal line XX as viewed from the lower surface , and in the rear half 5 over the entire length. Since the notch 9 having a width of about millimeters is formed, the front and rear side plates 3 and the left and right side plates 4 around the bottom plate 2 are simultaneously raised upward, and along the diagonal line XX from the back surface of the corner connecting plate 5. If a folding force is applied by pressing a finger or the like, the corner connecting plate 5 begins to bend from the portion where the notch 9 is first, and the trigger of the bending starting from the tip 10 can be easily grasped.

  As shown in FIG. 3, the tip portion 10 of the notch 9 forms an acute angle having an angle of approximately 45 degrees and is connected to the valley fold line 8 in the front half portion, so that it begins to bend from the tip portion 10. The force applied to the corner connecting plate 5 is accurately guided from the front end portion 10 to the valley fold line 8 and can be easily folded according to the valley fold line 8.

  The corner connecting plate 5 that is accurately folded along the valley fold line 8 passes through the first state diagram shown in FIG. 4 and is double-folded as shown in the second state diagram of FIG. In the state where the front and rear side plates 3 and the left and right side plates 4 are completely raised, they are substantially overlapped with the left and right side plates 4.

Incidentally, since the one of the front and rear side plates 3 or the left and right side plates 4 inner plate 6 are connected, as shown in FIGS. 4 and 5, the side plate and a corner portion connecting plate 5 which the inner plate 6 is connected When the overlapping portion is folded so as to be wrapped by the inner plate 6 and the insertion piece 11 formed at the tip of the inner wall 6 is inserted into the insertion hole 12 formed in the bottom plate 2 and fixed, FIG. It will be in the state of assembly completion drawing. In this state, the corner connecting plate 5 is very firmly fixed, the thickness of the side wall portion is increased, and a structure excellent in strength that can withstand multi-stage loading can be realized. is there.

  As described above, the assembly type cardboard box according to the present invention adopts a structure that can be easily assembled even by a worker who is unfamiliar with work, and can greatly reduce the labor and time required for assembly. In addition, it is excellent in strength and can be manufactured at low cost. Therefore, it is not particularly limited to fruits and vegetables, and can be effectively used when a large amount of cardboard boxes such as electric products are used.

1 plank, 2 bottom, 3 front and rear sides, 4 left right side plate, 5 corner connecting plate, 6 inner side plate, 7 corners, 8 trough fold line, 9 cut, 10 cut tip, 11 plug, 12 plug Hole

Claims (1)

A rectangular bottom plate, a pair of front and rear side plates and a pair of left and right side plates connected via a fold line when viewed from the four sides and the top surface of the bottom plate, and the outside of the corners of the four corners of the bottom plate Four square corner connecting plates that connect adjacent side plates through a valley fold line when viewed from above , and are assembled from a single plank, wherein the four corners In the part connecting plate, a valley fold line is formed in the front half near the corner on the diagonal starting from the corner of the bottom plate as viewed from the bottom, and the entire length of the rear half is about 5 mm from the diagonal over the entire length . A notch having a parallel width is formed, and a tip of the notch is formed in an acute angle having an angle of approximately 45 degrees with respect to the diagonal, and is connected to the valley fold line of the front half , and the pair of front and rear side plates or left and right Pair of left Of the side plates, one at least one, via the inward fold line when viewed from the top to the outside of the pair of side plates, prefabricated corrugated inner panel of the side plates and the same shape, characterized in that it is connected box.