Patent ID: RE42862

Claim:
A hook seat tightening structure for ship covers primarily comprising : a seat and a housing within which located two rollers, one turntable, one wheel, one lock bolt, and one lock member , an interior of the housing being provided with a rotation member and, a lock bolt, an exterior of the housing being provided with a knob, wherein an access is located at a rear end of the seat, two rollers are latched at two sides of the access, an indentation is located at a central position in an interior of the seat With a hole in a center of the indentation , and a central column is latched into the hole for positioning, and a projection piece is located a front end of the seat arranged at a center of the indentation ; an access located at a rear end of the housing, an indentation located at a central position in an interior of the housing, a hole located at a center of the indentation, and a through-hole and a lock hole being located on the housing, a tube section and a positioning column of the lock hole being protruded from a bottom surface of the housing, a notch located on the tube section of lock hole, a lock member being connected with the tube section of lock hole, the lock hole being provided with a hexagonal inner hole, a tenon, which can be rotated and moved in the notch of tube section, located at a side of the lock member, and a projection piece located at a front end of the housing; a through-hole located at a center of the turntable, a positioning hole located at a side of the through-hole, and ridges, which are radially extended, located at a periphery of the through-hole; a hollow part located at a top surface of the turntable, one-way ratchets located at a periphery of the hollow part, a central column having a through-hole and ridges which are radially extended located at a bottom surface, and a column head located at a side of the central column; a depressing piece and tenon located at two sides of the lock bolt respectively, a bore located at a top end of the lock bolt, a hole located on the tenon with , an end of a spring being inserted in the hole, and the other end of the spring being hooked on the positioning column of the housing, the depressing piece being pressed against the one-way ratchets of turntable, a latching place located on an exterior wall at the rotation member, a top end of the lock bolt , the lock bolt being rotated by a connection and control of a knob, and the lock member being provided with a key; being assembled with the knob, the housing being covered on with the seat , and a rivet being used to rivet the projection pieces of the housing and seat, so as to rivet the two casings to form an integral body by matching contours of the housing and the seat , a rope entering from a side of the access at a bottom of the tightening device structure and reeved on the turntable and wheel rotation member , followed by passing out from another side of the access at the bottom of the tightening structure .