Packaging member

Abstract

A packaging member includes a first packaging sub-member and a second packaging sub-member. The first packaging sub-member is formed in a tube shape extending in a first direction and internally includes a housing region for housing an article to be packaged. The second packaging sub-member is formed in a U-shape when viewed from the first direction and internally includes a housing region for housing the first packaging sub-member. The second packaging sub-member includes a pair of side wall portions that is arranged to be opposed to each other in a second direction orthogonal to the first direction and a concavity that is formed at an upper edge of each of the pair of side wall portions and is recessed downward. The first packaging sub-member includes a convexity that is arranged to be opposed to the concavity and is inserted into the concavity.

What is claimed is: 
     
         1 . A packaging member, comprising:
 a first packaging sub-member that is formed in a tube shape extending in a first direction and internally includes a housing region for housing an article to be packaged; and   a second packaging sub-member that is formed in a U-shape when viewed from the first direction and internally includes a housing region for housing the first packaging sub-member,   wherein   the second packaging sub-member includes:
 a pair of side wall portions that is arranged to be opposed to each other in a second direction orthogonal to the first direction; and 
 a concavity that is formed at an upper edge of at least one of the pair of side wall portions and is recessed downward, and 
   the first packaging sub-member includes a convexity that is arranged to be opposed to the concavity and is inserted into the concavity.   
     
     
         2 . The packaging member according to  claim 1 , wherein
 the second packaging sub-member includes a plurality of the concavities formed in the pair of side wall portions,   the first packaging sub-member includes a plurality of the convexities that are equal in number to the plurality of the concavities and are inserted into the plurality of the concavities, and   each of the plurality of the concavities is paired with a corresponding one of the plurality of the convexities, and pairs of the pluralities of the concavities and the convexities are different in length in the first direction.   
     
     
         3 . The packaging member according to  claim 1 , wherein
 the second packaging sub-member includes a plurality of the concavities formed in the pair of side wall portions,   the first packaging sub-member includes a plurality of the convexities that are equal in number to the plurality of the concavities and are inserted into the plurality of the concavities, and   each of the plurality of the concavities is paired with a corresponding one of the plurality of the convexities, and pairs of the pluralities of the concavities and the convexities are different in position in the first direction.   
     
     
         4 . The packaging member according to  claim 2 , wherein
 respective lengths or positions of the pairs of the pluralities of the concavities and the convexities in the first direction vary depending on a type of the article to be packaged.   
     
     
         5 . The packaging member according to  claim 1 , wherein
 the first packaging sub-member is formed by bending a single sheet material,   the first packaging sub-member includes:
 a tongue piece that protrudes outward from a circumferential edge of the sheet material and is bent at a crease line positioned at the circumferential edge; and 
 a hole into which the tongue piece in a bent state is inserted when the first packaging sub-member is formed into the tube shape, and 
   the convexity is arranged on an inner side of the tongue piece in the first direction and protrudes outward from the crease line.