A structure for folding trays of a paper folder, comprising:
- a casing body, inside the shell of which a case is installed for containing various components;
- a long groove is set on the top plate of the shell and a paper outlet is set on the front panel of the shell;
- a feed paper tray mechanism, pivotally installed in a position between two side walls of the case close to the long groove on the shell of the casing body, and which includes a feed paper tray that protrudes for keeping the paper to be folded;
- a feeding roller mechanism pivotally installed in a position between the two side walls of the case of the casing body, which includes a paper support base and a feeding roller that normally support and press against the paper in the feed paper tray of the feed paper tray mechanism so as to roll and feed the paper;
- a folding roller train pivotally installed in a position between the two side walls of the case of the casing body, which includes a major roller touching against a paper advance roller and a paper delivery roller respectively on one side, wherein the paper advance roller works with the feed paper roller to decide on the advancing distance for the paper, and the paper delivery roller faces against the paper outlet on the surface of the shell;
- a folding roller touches against the bottom edge of the major roller in a position between the paper advance roller and the paper delivery roller;
- a folding tray mechanism, including a folding tray that is fixed in a position between the two side walls of the case of the casing body to receive and fold the paper from the folding roller train;
- and a power mechanism that drives the feeding roller mechanism and rollers of the folding roller train to rotate at a proposed speed towards a certain direction, which has the following characteristics:
- the folding tray of the folding tray mechanism comprises two sub-circular cylindrical boards of a proposed radius, which are fixed and invaginated concentrically and in parallel at a proposed interval to form a sub-circular cylindrical board groove;
- one end of the sub-circular cylindrical board groove connects through a first folding board groove formed by the two boards at equal intervals, so that a groove outlet of the first folding board groove aligns with the position where the major roller and the paper advance roller meet;
- and the other end of the sub-circular cylindrical board groove connects through a second folding board groove formed by the two boards at equal intervals, making a groove outlet align with the position where the major roller and the paper delivery roller meet;
- at the ends of the sub-circular cylindrical board groove of the folding tray that are connected with the first folding board groove and the second folding board groove, first folding grooves and second folding grooves with a proposed length cut through symmetrically;
- the number and length of these grooves are equal, and the grooves include a first folding battle rod and a second folding baffle rod respectively;
- a first folding pivot and a second folding pivot are pivotally mounted at the center of the sub-circular cylindrical board groove and on the two side walls of the cases of the shell, and these pivots are connected with a first folding battle rod and second folding baffle rod in the two folding grooves for adjustments.