Patent ID: 12246888

DETAILED DESCRIPTION

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

Hereinafter, the front, rear, left and right directions will be described based on the front, rear, left and right directions shown inFIG.5.

FIG.5is an exploded view showing a part of a circumferential surface portion100and a bottom surface portion200in an unfolded state of a paper box having an interlocking structure of the bottom surface portion according to an embodiment of the present invention.

The paper box having interlocking structure of a bottom surface portion according to the present invention includes the circumferential surface portion100and the bottom surface portion200.

The circumferential surface portion100forms the circumferential surface of the paper box. The circumferential surface portion100may include, for example, a front plate110, one side plate120, a rear plate130, and the other side plate140. Here, the one side plate120may be, for example, a left side plate, and the other side plate140may be a right side plate, but is not limited thereto.

The front, rear, left, and right directions as described above are not necessarily limited, and may be named differently according to different front and rear directions and side directions. The front plate110, one side plate120, the rear plate130, and the other side plate140may be connected with a foldable fold line therebetween.

In addition, at least one of the front end and the rear end of the circumferential surface portion100may be provided with an adhesive surface portion150for connection between the front end and the rear end of the circumferential surface portion100.

The bottom surface portion200forms the bottom surface of the paper box. That is, the bottom surface portion200may forms the bottom surface of the paper box when the paper box is folded and assembled.

The bottom portion200includes a bottom surface plate300and a bottom surface flip plate400. The bottom surface plate300and the bottom surface flip plate400are each provided with two. Accordingly, the bottom surface plate300includes a first bottom surface plate300aand a second bottom surface plate300b, and the bottom surface flip plate400includes a first bottom surface flip plate400aand a second bottom surface plate400b. The bottom surface plate300and the bottom surface flip plate400are alternately positioned with each other. Accordingly, the first bottom surface flip plate400ais positioned between the first bottom surface plate300aand the second bottom surface plate300b, and the second bottom surface plate300bis positioned between the first bottom surface flip plate400aand the second bottom surface flip plate400b.

For example, assuming that the circumferential surface portion100constituting the paper box is composed of the front plate110, the one side plate120, the rear plate130, and the other side plate140, the first bottom surface plate300amay be provided under the front plate110, the first bottom surface flip plate400amay be provided under the one side plate120, the second bottom surface plate300bmay be provided under the rear plate130, and the second bottom surface flip plate400bmay be provided under the other side plate140.

The first bottom surface plate300aand the second bottom surface plate300bmay have substantially the same configuration. That is, the first bottom surface plate300aand the second bottom surface plate300bmay have a common element. In addition, the first bottom surface flip plate400aand the second bottom surface flip plate400bmay have substantially the same configuration. That is, the first bottom surface flip plate400aand the second bottom surface flip plate400bmay have a common element. For convenience, hereinafter, it will be consistently described as “bottom surface plate300” and “bottom surface flip plate400”. For example, in the following, a description of “the bottom surface plate300includes a protruding head portion310and a body portion320” may be understood as a description “the first bottom surface plate300aand the second bottom surface plate300bboth include the protruding head portion310and the body portion320”.

The bottom surface plate300includes a protruding head portion310and a body portion320. The protruding head portion310constitutes a front portion of the bottom surface plate300and protrudes further downward than the body portion320. The body portion320constitutes a rear portion of the bottom surface plate and is recessed upward compared to the protruding head portion310. That is, a width between upper and lower portions of the protruding head portion310is greater than a width between upper and lower portions of the body portion320.

In addition, an interlocking groove330is provided between the protruding head portion310and the body portion320. The interlocking groove330is deeply recessed upward compared to the protruding head portion310and the body portion320. That is, a width between upper and lower portions of the interlocking groove330is smaller than the width between upper and lower portions of the body portion320.

That is, the width between a fold line160forming the boundary between the circumferential surface portion100and the bottom surface plate300and a lower outer circumferential portion of the bottom surface plate300has an order of size of the protruding head portion310>body portion320>interlocking groove330.

In other words, as shown inFIG.6, the protruding head portion310has a first width V1in the vertical direction, the body portion320has a second width V2in the vertical direction, and the interlocking groove330has a third width V3in the vertical direction. The sizes of the first width V1, the second width V2, and the third width V3have a relationship of the first width V1>the second width V2>the third width V3.

A lower outer periphery of the protruding head portion310may include a first straight section500. In this case, the first straight section500may be parallel to the fold line160, which is a line connecting the circumferential surface portion100and the bottom surface plate300.

A rear outer periphery of the protruding head portion310may include a second straight section510. The second straight section510may be orthogonal to the fold line160, which is a line connecting the circumferential surface portion100and the bottom surface plate300. However, it is not necessarily limited thereto.

An inclined surface portion520may be provided between the first straight section500and the second straight section510. That is, a rear edge of the protruding head portion310may be configured with the inclined surface portion520having a chamfer structure. Here, the inclined surface is not necessarily limited to a straight inclined surface, and may be a curved surface having a curvature.

A lower outer periphery of the interlocking groove330may include a third straight section530. The third straight section530may be parallel to the fold line160, which is a line connecting the circumferential portion100and the bottom surface plate300. However, it is not necessarily limited thereto.

The second straight section510and the third straight section530may be orthogonally connected to each other. That is, the edge between the rear outer periphery of the protruding head portion310and the lower outer periphery of the interlocking groove330may be a right angle. However, it is not necessarily limited thereto.

A lower outer periphery of the body portion320may include a fourth straight section540. The fourth straight section540may be parallel to the fold line160, which is a line connecting the circumferential surface portion100and the bottom surface plate300. However, it is not necessarily limited thereto.

Between the third straight section530and the fourth straight section540, a step portion550generated by a vertical distance difference between the third straight section530and the fourth straight section540may be provided. The step portion550may be configured as an inclined surface having a predetermined inclination angle. Here, the inclination angle means that when the third straight section530and/or the fourth straight section540is a horizontal line in the relationship with the third straight section530and/or the fourth straight section540, the step portion550has a predetermined intervening angle (tilt angle).

The bottom surface plate300may further include a side flip portion340. The side flip portion340is provided to be foldable at the rear side of the body portion320. In detail, the side flip portion340may be connected to the body portion320via a folded portion560which is an inclined line between the body portion320and the side flip portion340.

The bottom surface flip plate400may be configured as a plate having a triangular shape as a whole. As described above, the bottom surface flip plates400may be connected to the one side plate120and the other side plate140to be foldable, respectively.

FIGS.7and8are views showing a process of assembling the bottom surface portion200of the box ofFIG.5.FIG.9is a view showing the bottom surface portion200viewed from the top to the bottom in a state in which the paper box ofFIG.5is assembled.

Hereinafter, the assembly of the paper box according to the embodiment of the present invention will be described.

As shown inFIG.7, in the case of assembling the paper box according to the embodiment of the present invention, when folded along the fold line provided on the circumferential surface portion100so that the front plate110and the rear plate130face each other, first, the first bottom surface plate300aand the second bottom surface plate300bof the bottom surface portion200primarily contact each other. In this case, a portion where the first bottom surface plate300aand the second bottom surface plate300bcontact each other is the first straight section500. That is, as a first straight section500aof the first bottom surface plate300aand a first straight section500bof the second bottom surface plate300bcome into contact with each other, the first bottom surface plate300aand the second bottom surface plate300bmake at least partially make line contact with each other.

In this state, force is applied as shown by arrows F1and F2inFIG.7. The direction in which the force is applied is a direction in which one side plate120and the other side plate140are positioned parallel to each other. In this case, because the first bottom surface plate300aand the second bottom surface plate300bare in line contact with each other as described above, a stable guide may be performed.

That is, when the first bottom surface plate300aand the second bottom surface plate300bmake point contact, as the contact force is concentrated at one point, there is a possibility of damage, and the effect of guiding the movements of the first and second bottom surface plates300aand300bto each other may be reduced. On the other hand, according to the embodiment of the present invention, because the first bottom surface plate300aand the second bottom surface plate300bare in line contact with each other by the first straight section500, the contact force is not concentrated at one point, thereby reducing the possibility of damage, and movements of the first bottom surface plate300aand the second bottom surface plate300bmay be naturally guided.

Next, as shown inFIG.8, when the rear outer circumferential portions500aand500b, which are the second straight sections, of the protruding head portion portions310aand310bconstituting the first bottom surface plate300aand the second bottom surface plate300breach a position where the end of the first straight section500aof the first bottom surface plate300aand the end of the first straight section500bof the second bottom surface plate300bcontact each other, an instantaneous interlocking is made by a drop. That is, the first bottom surface plate300amoves in the direction of the rear plate130(lower side), and the second bottom surface plate300bmoves in the direction of the front plate110(upper side). Accordingly, an interlocking groove330aof the first bottom surface plate300aand an interlocking groove330bof the second bottom surface plate300bcome into contact with each other.

In this case, according to the embodiment, the inclined surface portion520is provided at a corner position between the first straight section500forming the lower outer periphery of the protruding head portion310and the second straight section510forming the rear outer periphery of the protruding head portion310. Accordingly, friction or jamming does not occur, and instantaneous interlocking as described above may be stably performed.

In addition, in the interlocked state as described above the protruding head portion310aof the first bottom surface plate300aprotrudes deeply into the inside (lower side inFIG.8) of the second bottom surface plate300b, and the protruding head portion310aof the second bottom surface plate300bprotrudes deeply into the inside (upper side inFIG.8) of the first bottom surface plate300a. That is, the interlocking may be performed as shown inFIGS.8and9. Accordingly, the first bottom surface plate300aand the second bottom surface plate300bmay have a large contact area and high interlocking force. Due to such a configuration, durability of the bottom surface portion200may be improved.

According to the embodiment, the interlocking groove330is formed between the protruding head portion310and the body portion320and is recessed upward, so that the length of the second straight section510forming the rear outer periphery of the protruding head portion310is increased.

Accordingly, the size of a locking width W2between the first bottom surface plate300aand the second bottom surface plate300bmay be increased. In order to release the locking between the first bottom surface plate300aand the second bottom surface plate300b, the first bottom surface plate300aand the second bottom surface plate300bmust be deformed by the size of the locking width W2. Therefore, an increase in the locking width W2means that the interlocking force increases. Accordingly, according to the embodiment, the interlocking force between the first bottom surface plate300aand the second bottom surface plate300bis further increased by the configuration in which the locking width W2is increased.

In addition, as in the embodiment, the width V1of the protruding head portion310is larger than the width V3of the portion in which the interlocking groove330is formed. Accordingly, while the size of the locking width W2increases, durability of the bottom surface plate300may not be lowered at the same time.

In addition, as in the embodiment, the width V1of the protruding head portion310is larger than the width V2of the body portion320. Accordingly, while the locking width W2is further increased, an area covering the bottom increases. Therefore, the durability of the paper box may be improved. That is, durability of the paper box may be improved without adding additional members (e.g., bottom pads).

As a result, even if the weight of the contents is increased, it is possible to minimize loosening of the interlocking or opening of the bottom during distribution.

In addition, the paper box having the interlocking structure of the bottom surface portion of the paper box according to the embodiment of the present invention has a high interlocking force of the bottom surface portion, so it is difficult to take the contents out through the bottom. In addition, because the locking width W2between the bottom surface plates is large, if the contents are forcibly taken out through the bottom, the paper box is damaged. Therefore, it is possible to prevent forging the contents, and it is possible to easily identify the paper box in which the contents have been forged.

Table 1 below shows a comparison the interlocking force of the paper box having the interlocking structure of the bottom surface portion of the paper box according to the prior art, and the interlocking force of the paper box having the interlocking structure of the bottom surface portion of the paper box according to an embodiment of the present invention. The unit is commonly kgf.

TABLE 1ExperimentExperimentExperimentExperimentExperiment12345AveragePrior art8.87.98.37.56.97.9The present20.618.019.719.320.719.7invention

As shown in Table 1 above, the interlocking force of the paper box having the interlocking structure of the bottom surface portion of the paper box according to the prior art is 7.9 kgf on average, whereas the interlocking force of the paper box having the interlocking structure of the bottom surface portion of the paper box according to the embodiment of the present invention is 19.7 kgf. That is, it may be seen that the interlocking force is improved compared to the prior art.

Further, according to the interlocking structure of the bottom surface portion of the paper box according to the embodiment of the present invention, the assembly and configuration of the paper box using a machine is more convenient.

That is, in the case of the present invention, it is easy to construct the paper box having a rectangular cross-section by pressing the paper box flatly pressed in a parallelogram shape as shown inFIG.7from both sides to the center. This is because the first bottom surface plate300aand the second bottom surface plate300beach have a first straight section500aand a second straight section500bextending in the front-rear direction for a relatively long, so that guides are made in a form in line contact with each other when the first bottom surface plate300aand the second bottom surface plate300bcontact each other, and also, because the second straight section510extending in the vertical direction is coupled to each other when the first bottom surface plate300aand the second bottom surface plate300bare coupled. On the other hand, in the case of the prior art without such a straight section or relatively short, when the bottom surface plates300are coupled, the guiding effect and the interlocking force between the bottom surface plates300are relatively insufficient, and thus a manpower input is required in the assembly process. Therefore, in the case of the present invention, a mechanical process may be applied in the assembly, and the manufacturing cost is reduced.

In the above, preferred embodiments have been illustrated and described, but the present invention is not limited to the embodiments described above, and various modifications may be implemented by those of ordinary skill in the art to which the present invention belongs without departing from the gist of the present invention claimed in the claims, and these various modifications should not be individually understood from the technical idea or perspective of the present invention.

EXPLANATION OF REFERENCE NUMERALS DESIGNATING THE MAJOR ELEMENTS OF THE DRAWINGS

10: circumferential surface portion12: front plate14: one side plate16: rear plate18: other side plate20: bottom surface portion30: bottom surface plate30a: front bottom surface plate30b: rear bottom surface plate32: protruding head portion40a: one side flip plate40b: other flip plate40: flip plate52: inclined portion54: locking end100: circumferential surface portion110: front plate120: one side plate130: rear plate140: other side plate150: adhesive surface portion160: fold line200: bottom surface portion300: bottom surface plate300a: first bottom surface plate300b: second bottom surface plate310: protruding head portion320: body portion330: interlocking groove340: side flip portion400: flip plate400a: first bottom surface flip plate400b: second bottom surface flip plate500: first straight section500a: first straight section500b: first straight section510: second straight section520: inclined surface portion530: third straight section540: fourth straight section550: step portion560: folded portion