Pocket flange forming device for duct

A pocket flange forming device for a duct, the pocket flange forming device being configured to mold pocket flanges (1a), which are connecting portions of a duct, on longitudinal edge portions at opposite ends of a plate (1) made of a rectangular metal plate, through a sequential forming process, the forming device (100) comprising:

• a base (101) combined with a beam and constructed from a bottom surface;
• a stand (120) disposed at each of left and right portions of an upper portion of the base (101) to be in parallel to each other and provided to be movable by a gap adjusting part (110) provided at the upper portion of the base (101);
• a fixing stand (130) disposed at each of front and rear sides of upper left and right portions of the stand (120) to correspond to each other;
• a forming molding unit (140) rotatably provided between the fixing stand (130) and another fixing stand (130) at the front and rear sides, and comprising a plurality of forming rollers (R) continuously provided at opposite sides of supports (141) corresponding to each other to form pocket flanges on longitudinal edges at opposite sides of the plate (1) inserted between the forming rollers, by sequentially performing molding process of bending, folding, and compressing;
• a first rotary driving unit (150) provided at the stand (120) and configured to transmit power to the forming rollers (R) of the forming molding unit (140);
• a second rotary driving unit (160) provided at the stand (120) and configured to rotate the entire forming molding unit (140) by 180 degrees against the fixing stand (130);
• a transfer unit (170) provided at the upper portion of the base (101) and configured to support the plate (1) to transfer the plate (1) to the forming molding unit (140) provided at the opposite sides, in one direction;
• an elevation stand unit (180) provided at an upper portion of the stand (120) to be raisable and lowerable and configured to support a lower portion of the rotated forming molding unit (140);
• and
• a fixation unit (190) provided on an upper portion of the fixing stand (130) and configured to fix the forming molding unit (140) rotated by 180 degrees,
• wherein each of the supports (141) corresponding to each other of the forming molding unit (140) comprises:
• one or more shaft fixing stands (142) continued in a longitudinal direction, and provided to be vertically adjustable at upper and lower portions at opposite sides of the supports (141), and a first roller shaft (143) rotatably provided to each of the shaft fixing stands (142) and coupled to, at opposite ends thereof, the forming rollers (R),
• a second roller shaft (144) rotatably provided on the supports (141), and coupled to, at opposite ends thereof, forming rollers (R) to match with the forming rollers (R) on the first roller shaft (143) for forming molding,
• a driving gear (145) coupled to each of the first roller shaft (143) and the second roller shaft (144) and configured to allow engagement rotation driving,
• a ring gear (146) connected to one of the supports (141) and another support (141) while being located therebetween, and configured to be transmitted with power from the second rotary driving unit (160) to rotate the forming molding unit (140) entirely, and
• a roller power transmission part (147) provided at second roller shafts (144) at the supports (141) at the opposite sides based on the ring gear (146) and configured to rotate the second roller shafts (144) at the supports (141) in the same rotating direction.