JP5069062B2 - Cardboard box - Google Patents

Description

  The present invention relates to a cardboard box whose bottom can be closed without using adhesive tape or staples.

  As a corrugated cardboard box for storing agricultural products, etc., each pair of side plates and end plates, bottom flaps extending from the bottom edges of both end plates, bottom difference plates extending from the bottom edges of one side plate, and the other side plate A bottom receiving plate extending from the bottom edge, forming insertion pieces on both sides of the front end portion of the bottom differential plate, forming insertion slits in the bottom receiving plate, It is known that the bottom plate is overlapped in this order and the bottom piece is assembled by inserting the insertion piece into the insertion slit (see Patent Document 1).

Such a corrugated cardboard box can be quickly and easily closed at the storage site by assembling the bottom plate and the bottom receiving plate without using adhesive tape or staples.
Also, when the box is dismantled, it is safe because the staples do not fly off.

However, this type of conventional cardboard box has been determined in consideration of ease of insertion into the insertion slit (for example, in FIG. 1 of Patent Document 1, the insertion slit has a semi-disc shape). ) The insertion strength was weak.
For this reason, it is not suitable for storing heavy agricultural products such as watermelons, and when such heavy objects are stored, the insertion piece does not endure the weight and comes out of the insertion slit, and the box is There was a risk of falling out.
Utility Model Registration No. 356614

  Therefore, the problem to be solved by the present invention is to prevent bottom-out at the time of heavy object storage by devising the shape of the insertion piece for the cardboard box that is assembled by inserting the insertion piece into the insertion slit. It is.

In order to solve the above-described problems, each pair of side plates and end plates, bottom flaps extending from the bottom edges of both end plates, bottom difference plates extending from the bottom edges of one side plate, and bottoms of the other side plate A bottom receiving plate extending from the edge, a pair of insertion pieces are formed on both sides of the tip of the bottom difference plate, a pair of insertion slits are formed on the bottom receiving plate, and a bottom flap and For the corrugated cardboard box according to the present invention, the following configuration is adopted, in which the bottom receiving plate and the bottom difference plate are overlapped in this order and the insertion piece is inserted into the insertion slit to be bottom assembled.
That is, the insertion piece is partitioned by forming an oblique cut toward the tip side from both sides to the center of the bottom difference plate, and this notch is formed when the bottom difference plate and the bottom receiving plate are overlapped. The inner end of the inclined cutting edge portion of the insertion piece, which is formed by the above, is substantially overlapped with one end of the insertion slit on the front end side of the bottom receiving plate.

When the insertion piece configured as described above is inserted into the insertion slit and laid down, the outer end of the inclined cutting edge of the insertion piece is further closer to the tip of the bottom receiving plate than one end of the insertion slit. Will be located.
Therefore, even if it tries to pull out an insertion piece from an insertion slit in this lying state, it does not come out and it can prevent a bottom drop with a simple structure.

Furthermore, if the length from the front end to the base end of the bottom difference plate and the bottom support plate is approximately the same as the plate width of each end plate, the insertion plate and the bottom support plate are almost completely in the state of being assembled. The length from the front end to the base end of the overlapping and bottom flaps is preferably about half the plate width of the side plate.
If it does in this way, since the front-end | tips of a bottom flap will face each other in the state of bottom assembly, the bottom will become a triple structure as a whole, and the bottom will be strengthened further.
Further, since the insertion piece is completely sandwiched between the bottom receiving plate and the bottom flap, the removal from the insertion slit is further prevented.

  When the shape of the insertion piece of the bottom difference plate is inserted into the insertion slit of the bottom receiving plate and laid down, it has a shape that makes it difficult to escape from the slit, so that the bottom loss is prevented and a cardboard box suitable for storing heavy objects Become.

In the blank of the cardboard box 10 according to the embodiment shown in FIG. 1, each pair of side plates 11 and end plates 12 are alternately connected, and a passage piece 13 is connected to the open side edge of the one side plate 11. Composed.
Here, near the upper edge of each end plate 12, a finger hole 12a is provided for inserting a finger when the cardboard box 10 is lifted.

A bottom plate 14 is connected to the bottom edge of the one side plate 11, a lid plate 15 is connected to the top edge, a bottom receiving plate 16 is connected to the bottom edge of the other side plate 11, and a cover plate 15 is connected to the top edge. Are connected to each other.
Further, a bottom flap 17 is connected to the bottom edge of each end plate 12, and a lid flap 18 is connected to the top edge.

As shown in the drawing, oblique cuts are made from both sides to the center of the bottom plate 14 toward the front side of the bottom plate 14, whereby both sides of the front end portion of the bottom plate 14 are placed on the bottom plate 14. The insertion piece 19 is formed by being partitioned from itself.
The portion where the cut is made is a cut edge portion 19 b of the insertion piece 19 which is inclined.
Further, a fold 19a is formed at the boundary between the insertion piece 19 and the bottom difference plate 14, and the insertion piece 19 is rotatable with respect to the bottom difference plate 14 around the fold 19a.
Further, the outer corner of the insertion piece 19 is cut obliquely in order to facilitate insertion into an insertion slit 16a described later.

On the other hand, as shown in the figure, the bottom receiving plate 16 is formed with a pair of opposing slits 16a in parallel with each other in the plate width direction.
One end of each insertion slit 16 a is in the middle of the bottom receiving plate 16, and the other end reaches the vicinity of the base end of the bottom receiving plate 16.
In addition, a fold 16b that connects both ends of the insertion slit 16a is formed, and a portion defined by the fold 16b and the insertion slit 16a is formed in a flap shape and can be rotated with respect to the bottom receiving plate 16. It has become.

Here, as can be seen from FIG. 1, the length from the base end to the tip end of the bottom receiving plate 16 and the bottom difference plate 14 is substantially the same as the plate width of the end plate 12.
Further, the length from the base end to the tip end of the bottom flap 17 is about half the plate width of the side plate 11.

  The corrugated cardboard box 10 is stored in a state where the passage piece 13 is attached to the opposite end plate 12 and is folded flat so as not to be bulky.

In use, as shown in FIG. 2, each pair of side plate 11 and end plate 12 forms a square tube, and the bottom flap 17, the bottom receiving plate 16, and the bottom plate 14 are overlapped in this order.
As can be seen from FIGS. 1 and 2, the positional relationship between the insertion piece 19 and the insertion slit 16 a at the time of superposition is such that the inner end of the cut edge 19 b of the insertion piece 19 is inserted into the insertion slit. 16a is substantially overlapped with one end of the bottom receiving plate 16 on the front end side, and the front end portion of the insertion piece 19 is substantially overlapped with the other end of the insertion slit 16a on the base end side of the bottom receiving plate 16.

  Next, as shown in FIG. 3A, the insertion piece 19 is rotated by the crease 19 a so that the insertion piece 19 stands up at a substantially right angle with respect to the bottom difference plate 14, and is inserted into the insertion slit 16 a of the bottom receiving plate 16.

Here, as described above, the outer corners of the insertion piece 19 are cut obliquely, and the portion defined by the insertion slit 16a and the crease 16b is formed in a flap shape and can be rotated around the crease 16b. It has become.
For this reason, even if the insertion position of the insertion piece 19 is slightly shifted, the error is absorbed and can be smoothly inserted into the insertion slit 16a, and the insertion piece 19 and the insertion slit 16a interfere with each other. Is prevented.

When assembled from the bottom, as shown in FIG. 3B, the bottom receiving plate 16 and the bottom difference plate 14 are almost completely overlapped, and as shown in FIG. Face each other.
Therefore, as shown in FIG. 5B, the bottom of the cardboard box 10 has a substantially complete triple structure, and the strength of the bottom is remarkably enhanced as compared with the conventional cardboard box.

  Further, when a heavy article such as a watermelon is stored in the cardboard box 10 as shown by an arrow in FIG. 4 in a state where the bottom is assembled, the weight difference of the heavy article and the restoring elasticity of the corrugated cardboard material cause On the other hand, the insertion piece 19 standing upside down will be maintained, and this fallen state will be maintained.

  In this state, the lid flap 18 and the lid plate 15 are overlapped in this order to close the upper surface of the cardboard box 10 in a state where the heavy objects are stored, and then shipped.

  Moreover, after taking out a heavy article at the shipping destination, the cardboard box 10 can be easily removed by raising the insertion piece 19 substantially at right angles to the bottom difference plate 14 and pulling it out from the insertion slit 16a of the bottom receiving plate 16. Can be dismantled.

Here, as shown in FIG. 5, in the lying state of the insertion piece 19, a distance d <b> 1 from the base end of the bottom receiving plate 16 to the outer end of the cut edge 19 b of the insertion piece 19 is equal to the bottom receiving plate 16. It is larger than the distance d2 from the base end to one end of the insertion slit 16a on the front end side of the bottom receiving plate 16.
That is, the outer end of the cut edge 19b of the insertion piece 19 is positioned further to the distal end side of the bottom receiving plate 16 than the one end of the insertion slit 16a on the distal end side of the bottom receiving plate 16.
Therefore, even if it tries to pull out the insertion piece 19 in the lying state from the insertion slit 16a, it does not get caught and the bottom of the box 10 is prevented from coming off with a simple structure.

Corrugated box development Partial perspective view showing the bottom assembly process of the cardboard box from the bottom side Partial perspective view showing the bottom assembly process of the cardboard box from the bottom side Partial perspective view showing the bottom assembly process of the cardboard box from the upper surface side (A) is a plan view of the insertion piece and the insertion slit portion of the corrugated cardboard box, and (b) is an arrow cross-sectional view of (a).

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Cardboard box 11 Side plate 12 End plate 12a Finger hole 13 Passage piece 14 Bottom difference plate 15 Cover plate 16 Bottom receiving plate 16a Insertion slit 16b Fold 17 Bottom flap 18 Cover flap 19 Insert 19a Fold 19b Cut edge Part

Claims (1)

Each pair of side plates 11 and end plates 12, bottom flaps 17 extending from the bottom edges of both end plates 12, bottom difference plate 14 extending from the bottom edge of one side plate 11, and extending from the bottom edge of the other side plate 11 And a pair of insertion pieces 19 which are partitioned by folds 19a on both sides of the bottom difference plate 14 and are rotatable around the folds 19a. A pair of insertion slits 16a is formed on the base plate, the bottom flap 17, the bottom receiving plate 16 and the bottom difference plate 14 are superposed in this order, and the insertion piece 19 is turned upright to be inserted into the insertion slit 16a. In the corrugated cardboard box 10 that is
The insertion piece 19 is partitioned and formed by making an oblique cut toward the tip side from both sides of the bottom plate 14 to the center portion,
When the bottom difference plate 14 and the bottom receiving plate 16 are overlapped, the inner end of the inclined cutting edge portion 19b of the insertion piece 19 formed by the notch is the front end side of the bottom receiving plate 16 of the insertion slit 16a. The outer edge of the inclined edge 19b of the insertion piece 19 that is inclined so as to substantially overlap with one end of the insertion piece 19 further than the one end of the insertion slit 16a on the distal end side of the bottom reception plate 16 The lying insertion piece 19 inserted into the insertion slit 16a so as to be positioned on the distal end side is prevented from being caught and pulled out from the insertion slit 16a.
The length from the front end to the base end of the bottom difference plate 14 and the bottom receiving plate 16 is substantially the same as the plate width of the end plate 12, and the length from the front end to the base end of the bottom flap 17 is The length of the side plate 11 is about half the plate width,
When the pair of bottom flaps 17, bottom receiving plate 16, and bottom difference plate 14 are overlapped in this order, the tips of the bottom flaps 17 abut each other, and the bottom receiving plate 16 and bottom difference plate 14 overlap almost completely, so that the bottom is almost the same. In addition to the complete triple structure, the insertion piece 19 of the bottom difference plate 14 inserted into the insertion slit 16a of the bottom support plate 16 is sandwiched between the bottom support plate 16 and the bottom flap 17 so that the lying state can be maintained. Corrugated cardboard box characterized by that.

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