| 摘要 |
PROBLEM TO BE SOLVED: To accurately form folding lines in order to fold the end parts of a package, and at the same time, accurately perform the folding of the end parts along the folding lines. SOLUTION: A turning arm 61 is respectively provided on an upper arm part 59 and a lower arm part 60, and a bending arm 62 which is urged by a spring 74, is attached to the turning arm 61, and folding line placing utensils 63, 80 are attached to the leading end of the bending arm 62. By a turning of the turning arm 61, contact surfaces 75, 76, 77 and 82, 83 of the folding line placing utensils 63, 80 come into contact with the end part of a semi- package, and folding lines are formed. By further turning the turning arm 61, a temporary folding along the folding lines is performed. Since the forming of the folding lines and the temporary folding are simultaneously performed, these do not slip, and a folding after that become accurate. Also, since the spring 74 absorbs the reaction force of the semi-package, a positional slip does not occur. |
