Patent Publication Number: US-2017349350-A1

Title: Packaging case

Description:
TECHNICAL FIELD 
     The present invention relates to a packaging case. More particularly, the present invention relates to a packaging case, in which an inner case for packaging a product is fixed inside an outer case to accommodate and package the product. 
     BACKGROUND ART 
     Generally, in order to prevent a product from being scratched or damaged, the product is packaged by a packaging case. 
     However, a conventional packaging case has an integrated structure, so that the packaging case is likely to be damaged by an action of throwing the packaging case during transport or by an external force. 
     Particularly in post offices or parcel delivery service companies transporting and handling various kinds of packaging cases, in some cases, the packaging case may be frequently thrown so as to reduce a transport time when the packaging case is loaded into a loading box, thus leading to a damage to the packaging case and consequently causing the packaged product to be frequently exposed or damaged. 
     Therefore, there is an urgent need for development of a packaging case that is not easily damaged by an external force during transport. 
     DISCLOSURE 
     Technical Problem 
     The present invention has been made in an effort to solve the above-described problems associated with related art. An object of the present invention is to provide a packaging case, which adopts a dual structure having an inner case and an outer case, thus absorbing shocks exerted on a product that is accommodated and packaged in the inner case, allowing the inner case to be reliably fixed, and preventing the packaged product from being exposed and damaged. 
     Technical Solution 
     In order to accomplish the above object, the present invention provides a packaging case including an inner case having at least three sidewalls for packaging a product; and an outer case having support pieces supporting a pair of inner case sidewalls, which face each other, so as to prevent a movement of the inner case, surrounding a remaining region excluding the inner case sidewalls supported by the support pieces, and accommodating and packaging the inner case, wherein the support pieces may be foldably provided to the outer case. 
     Each of the support pieces may support at least a periphery of an associated sidewall. 
     The inner case may have a shape of a square pillar that is open at both sides thereof. 
     Any one of the four sidewalls of the inner case may include a first overlapping portion and a second overlapping portion that may be cut to partially overlap each other, and the first overlapping portion and the second overlapping portion may be attached to each other by an adhesive or tape, or a cut-out portion that may be partially cut may be foldably formed on a surface of the first overlapping portion and a free end of the second overlapping portion may be fitted into the cut-out portion. 
     The pair of sidewalls of the inner case supported by the support pieces may come into close contact with the packaged product to support the product. 
     Advantageous Effects 
     According to the present invention, a packaging case adopts a dual structure having an inner case and an outer case, and firmly supports the inner case using the outer case, thus absorbing shocks exerted on a product that is accommodated and packaged in the inner case, allowing the inner case to be reliably fixed, and preventing the packaged product from being exposed and damaged. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a perspective view illustrating a packaging case according to an embodiment of the present invention; 
         FIG. 2  is a development view illustrating an inner case of  FIG. 1 ; 
         FIG. 3  is a development view illustrating an outer case of  FIG. 1 ; and 
         FIGS. 4 to 7  are views sequentially illustrating a process of packaging the packaging case according to an embodiment of the present invention. 
     
    
    
     BEST MODE FOR THE INVENTION 
     Exemplary embodiments of the present invention will be described below in more detail with reference to the accompanying drawings. 
       FIGS. 1 to 3  illustrate a packaging case according to an embodiment of the present invention. As illustrated in the drawings, the packaging case  1  according to the embodiment of the present invention includes an inner case  10  and an outer case  30 . 
     The inner case  10  serves to package a product. In this embodiment, the inner case  10  has the shape of a square pillar that is open at both sides thereof. 
     As illustrated in  FIG. 2 , four inner folding lines  21  are formed on a surface of the inner case  10  to form four inner sidewalls  11 ,  13 ,  15  and  17 . The four inner folding lines  21  are formed at intervals in a longitudinal direction of the inner case  10 . 
     Among the four inner sidewalls  11 ,  13 ,  15  and  17 , one inner sidewall  11  includes a first overlapping portion  11   a  and a second overlapping portion  11   b  that are cut to partially overlap each other. 
     Meanwhile, a pair of cut-out portions  25 , which is partially cut into the shape of a triangular cross-section to be foldable, is formed at intervals on a surface of the first overlapping portion  11   a . A free end of the second overlapping portion  11   b  is fitted into each cut-out portion  25 , so that the first overlapping portion  11   a  and the second overlapping portion  11   b  constitute the same inner sidewall  11 . 
     Although the cut-out portion  25  is shown in this embodiment as being partially cut into the triangular cross-sectional shape, the cut-out portion  25  may be partially cut into any one of circular, elliptical and polygonal cross-sectional shapes without being limited to the triangular cross-sectional shape. 
     Moreover, the first overlapping portion  11   a  and the second overlapping portion  11   b  are shown in this embodiment as being coupled to each other in a fitting method using the cut-out portions  25 . However, the first overlapping portion  11   a  and the second overlapping portion  11   b  may be attached to each other by an adhesive or tape without being limited to fitting. 
     Although not shown in the drawings, in the inner case  10  of the packaging case  1  according to the present invention, facing edges of the first overlapping portion  11   a  and the second overlapping portion  11   b  may be attached to each other by the adhesive such as hot melt, or the first overlapping portion  11   a  and the second overlapping portion  11   b  may be attached to each other by the tape, instead of overlapping the first overlapping portion  11   a  and the second overlapping portion  11   b.    
     The outer case  30  serves to accommodate and package the inner case  10 . In this embodiment, the outer case  30  has the shape of a square pillar that is open at both sides thereof. The outer case  30  includes support pieces  41  that support the pair of facing inner sidewalls  13  and  17  of the inner case  10  to prevent an undesired movement of the inner case  10 . 
     As illustrated in  FIG. 3 , four transverse folding lines  45  for forming four outer sidewalls  31 ,  33 ,  35  and  37  and two longitudinal folding lines  47  for forming the support pieces  41  are formed on the surface of the outer case  30 . The four transverse folding lines  45  are formed at intervals in a longitudinal direction of the outer case  30 , and the two longitudinal folding lines  47  are formed at intervals to be perpendicular to the transverse folding lines  45 . 
     Meanwhile, the four transverse folding lines  45  are formed to be spaced apart from each other in a size corresponding to transverse and longitudinal sides of the pair of inner sidewalls  13  and  17  supported by the support pieces  41  of the inner case  10 . 
     The two longitudinal folding lines  47  are formed, respectively, inside both longitudinal sides of the surface of the outer case  30  in a size corresponding to a depth to which the inner case  10  is accommodated from an end of the outer case  30 . By folding the surface of the outer case  30  along the longitudinal folding lines  47 , the support pieces  41  are formed, which support the pair of facing inner sidewalls  13  and  17  of the inner case  10  to prevent an undesired movement of the inner case  10 . 
     Among the four outer sidewalls  31 ,  33 ,  35  and  37 , one outer sidewall  31  is cut into two equal parts, a first panel  31   a  and a second panel  31   b . The first panel  31   a  and the second panel  31   b  may be attached at facing edges thereof to each other by the adhesive such as the hot melt, or may be attached to the inner case  10  by the adhesive such as the hot melt, or may be attached to each other by the tape. 
     Thus, the packaging case  1  according to the present invention is configured such that the inner case  10  is disposed between the pair of longitudinal folding lines  47 . The outer case  30  surrounds the pair of inner sidewalls  11  and  15  of the inner case  10  that are not supported by the support pieces  41  and both openings of the inner case  10 , and accommodates the inner case  10 . 
     A process of packaging a product using the packaging case  1  according to the present invention configured as described above will be described below. 
     First, as illustrated in  FIGS. 2 and 3 , a spread cardboard for the inner case  10  corresponding to the size of the product to be packaged and a spread cardboard for the outer case  30  corresponding to the size of the inner case  10  are prepared. 
     Next, the product to be packaged is put on the spread cardboard for the inner case  10 , and the inner case  10  is folded along each inner folding line  21 , and the free end of the second overlapping portion  11   b  is fitted into the cut-out portion  25  of the first overlapping portion  11   a , so that the packaging of the inner case  10  is completed. 
     Further, as illustrated in  FIG. 4 , the outer case  30  is folded inwards along the longitudinal folding line  47 , so that the support piece  41  is formed on the outer case  30 . 
     Subsequently, as illustrated in  FIG. 5 , the inner case  10  is positioned on the surface of the outer case  30  so that the pair of facing inner sidewalls  13  and  17  of the inner case  10  comes into close contact with the pair of support pieces  41 . 
     As illustrated in  FIGS. 6 and 7 , sequentially, the outer case  30  is folded along each transverse folding line  45 , so that the inner case  10  is accommodated in the outer case  30  to surround the pair of inner sidewalls  11  and  15  of the inner case  10  that are not supported by the support pieces  41  and both openings of the inner case  10 . 
     In this regard, the inner case  10  is accommodated to a depth corresponding to a width of the support piece  41  of the outer case  30  from an end of the outer case  30 . 
     Subsequently, when the first panel  31   a  and the second panel  31   b  are attached to each other by the adhesive such as the hot melt, as illustrated in  FIG. 1 , the pair of sidewalls of the inner case  10  exposed through the openings of the outer case  30  is firmly fixed by the support pieces  41  of the outer case  30 . Thus, the packaging case  1  according to the present invention is completed. 
     As such, according to the present invention, the packaging case adopts a dual structure having the inner case and the outer case, and firmly supports the inner case using the outer case, thus absorbing shocks exerted on the product that is accommodated and packaged in the inner case, allowing the inner case to be reliably fixed, and preventing the packaged product from being exposed and damaged. 
     Although the support pieces of the outer case are shown in the above-described embodiment as being supported along four sides of the sidewalls of the inner case, the support pieces may be supported along at least one side of the sidewalls of the inner case without being limited thereto. Further, in the above-described embodiment, the inner case has four inner sidewalls. However, the inner case may have three or five or more inner sidewalls without being limited thereto. 
     Furthermore, the inner case is prepared in a size corresponding to the size of the product to be packaged and then is used to package the product, thus preventing the packaged product from being shaken during the transport of the packaging case, and reducing a damage to a package. At this time, the pair of inner sidewalls of the inner case supported by the support pieces may come into close contact with the product to be packaged to support the product.