Patent ID: 11891100
Assignee: YEONG HWAN PARK
Field: Transport (Mechanical engineering)
Classification: CPC B  Y | IPC B

Claim 8:
9. The foldable lightweight roll container of claim 1, wherein
the left hinge member (200) is configured to include first and second left hinge pieces (201, 202) including:
first and second left plate bodies (211, 221) each coupled to the fastening groove portion (111) having a side cross section with the form of two circles with tangents connected by a line;
first and second left fixation bearing portions (212, 222) protruded and extended to correspond to front end portions of inner and outer surfaces of each of the first and second left plate bodies (211, 221);
first and second left bearing portions (213, 223) protruded and extended to rear end portions of inner and outer surfaces of the first and second left plates bodies (211, 221) to correspond to the first and second left fixation bearing portions (212, 222);
a third left plate body (231) having a plane cross section with an arc form, a third left hinge piece (203) including third left and right bearing portions (232, 233) having the same diameter as the first and second left bearing portions (213, 223) on both ends of the third left plate body (231) to have a plane cross section;
a first left pin (204) axially installing the first left bearing portion (213) and the third left bearing portion (232) to be rotated;
a second left shaft pin (205) axially installing the second left bearing portion (223) and the third right bearing portion (233) to be rotated;
a left fixation shaft pin (206) axially coupling and fixing the first left fixation bearing portion (212) and the second left fixation bearing portion (222); and

the right hinge member (300) is configured to include:
a first right hinge piece (301) including a first right plate body (311) having a plane cross section with a form of a straight line with a curved line starting from an end, and a rear piece coupled and fixed to the fastening groove portion (111), a first right bearing portion (312) protruded and extended to a front end of an inner surface of front piece of the first right plate body (311) toward an inner side, and a first right fixation bearing portion (313) protruded and extended to a rear side of an outer surface of the front piece, and having a plane cross section;
a second right hinge piece (302) including a second right plate body (321) coupled to the fastening groove portion (111) having a plane cross section and a side cross section with a form of a straight line with a curved line starting from an end, a second right bearing portion (322) extended to an end portion of a bending piece of a rear side of an outer surface of the second right plate body (321), and a second right fixation bearing portion (323) extended to an outer end of a straight-line piece of a front side of an outer surface of the second right plate body (321), and having plane cross section in a form of a straight line with a curved line starting from an end;
a right shaft pin (303) axially installing the first and second right bearing portions (312, 322) to be rotated; and
a right fixation shaft pin (304) axially coupling the first and second right fixation bearing portions (313, 323) not to be rotated.