Flat roll-up structure for rolling up net body

A flat roll-up structure for rolling up net body flatly, comprising of a net body and a roll-up mechanism;

• wherein, the net body contains a grid-shaped net surface, and on upper end and lower end of a net surface, an edge trim made up of canvas is installed respectively, meanwhile, at the edge trim, a hard protruding object is installed;
• one side of the net body is associated at the roll-up mechanism, and is driven by the roll-up mechanism to expand or roll up and receive the net body;
• the net body, at one side relatively associated with the roll-up mechanism, is installed with one straight traction part, and above the traction part, a columnar body is installed, through the holding of columnar body of the traction part, the net body can be withdrawn or rolled up and received flatly;
• the roll-up mechanism contains a reel, an upper cap, a lower cap and a connecting lever;
• the reel contains an inner shaft, and the inner shaft is connected to the upper cap and lower cap so that the inner shaft can rotate between the upper cap and lower cap;
• an outer side of the inner shaft is installed with an outer barrel for roll-up and fixing by the net body, and the outer barrel is connected to the inner shaft so that the outer barrel can rotate along with the inner shaft;
• the upper cap is installed at upper end of the reel, and an inner side of the upper cap is installed with an upper shaft connecting part, an upper roller positioning part and an upper connecting barrel;
• the upper connecting shaft part is connected by an inner shaft of the reel;
• the upper roller positioning part is installed with an upper positioning roller set;
• the upper positioning roller set contains two sets of upper positioning rollers, and the edge trim at upper end of the net body penetrates into the upper positioning roller set;
• and between the two upper positioning rollers, an upper position-limiting part used to limit a protruding object at upper end of the net body is formed, and an width of the upper position-limiting part is slightly larger than the protruding object so that the protruding object can move within the upper position-limiting part without separating therefrom, and the upper cap, at the front end of the upper roller positioning part, is installed with an upper opening, in addition, a columnar body of the traction part, when the net body is rolled up and received, can just stop and block the front end of the upper positioning roller set;
• the upper connecting barrel provides a site to be installed by the connecting lever;
• the lower cap is installed at the lower end of the reel, and at an inner side of the lower cap, a lower shaft connecting part, a lower roller positioning part and a lower connecting barrel are installed;
• the lower connecting shaft is to be connected by a lower end of the inner shaft of the reel;
• the lower roller positioning part is installed with a lower positioning roller set;
• the lower positioning roller set contains two sets of lower positioning rollers, and the edge trim at lower end of the net body penetrates into the lower positioning roller set;
• and between the two lower positioning rollers, a lower position-limiting part used to limit the protruding object at lower end of the net body is formed, and an width of the lower position-limiting part is slightly larger than the protruding object so that the protruding object can move within the lower position-limiting part without separating therefrom;
• and for the lower cap, one lower opening at front end of the lower roller positioning part are installed;
• the lower connecting barrel provides a site to be installed by the connecting lever;
• the protruding object at upper and lower end of the net body penetrates respectively through an upper position-limiting part of the upper positioning roller set and lower position-limiting part of the lower positioning roller set so that the net body, limited by the upper position-limiting part and the lower position-limiting part, can expand flatly, or can be rolled up and received into the reel flatly.