Hook seat tightening structure for ship covers

Abstract

A hook seat tightening structure for ship covers comprises a body constituted by a seat and a housing, wherein two rollers, one turntable, one wheel, one lock bolt, and one lock member are located therein. A depressing piece and a tenon are located at two sides of the lock bolt respectively. The lock bolt can be rotated and elastically restored by the tenon, which is connected with a spring. The depressing piece is pressed against one-way ratchets on the turntable, and the lock bolt can be rotated subject to a control by a key. A rope enters and is reeved on the turntable and wheel, to constitute a tightening device permitting a one-way gliding of the rope. Accordingly, when the lock member is locked by rotating the key, the tenon on the lock member can be latched on the depressing piece of the lock bolt, thereby achieving a locking function.

1. 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. 
     
     
       2. The hook seat tightening structure for ship covers according to  claim 1 , wherein two bores are located at two sides of the access of the seat respectively, and two screws are used to pass through the bores for latching the rollers, followed by locking the screws on the housing, so as to position the rollers between the seat and housing. 
     
     
       3. The hook seat tightening structure for ship covers according to  claim 1 , wherein the lock bolt passes out from the through-hole of housing, and a screw is used to pass through the knob to connect with the lock bolt and knob, and the latching place is located on an exterior wall at a top end of the lock bolt for latching the knob. 
     
     
       4. The hook seat tightening structure for ship covers according to  claim 1 , wherein the lock member is connected with the tube section of lock hole, a ring of groove is located at an edge close to an end of the tube section, and a flange located at a lower end of the lock member for being latched into the ring of groove, so as to fit the lock member with the lock hole. 
     
     
       5. The hook seat tightening structure for ship covers according to  claim 1 , wherein a hexagonal rod, which can be inserted into the hexagonal inner hole of the lock member, is located at a bottom of the key, and the lock member can be rotated by rotating the key. 
     
     
       6. The hook seat tightening structure for ship covers according to claim 1, wherein the rotation member is constituted by a turntable and a wheel, a center of the turntable is provided with a through-hole, a positioning hole being provided offset from a side of the through-hole, and a rim of the through-hole is provided with radiant ridges; a top surface of the wheel being provided with a hollow part, a rim of the hollow part being provided with the one-way ratchets, and a bottom surface of the wheel being provided with a central column having a through-hole and radiant ridges, whereas a side of the central column being provided with a column head. 
     
     
       7. The hook seat tightening structure for ship covers according to claim 1, wherein a front end of the seat is provided with a projection piece which is riveted with a projection piece provided at a front end of the housing. 
     
     
       8. The hook seat tightening structure for ship covers according to claim 1, wherein a top end of the lock bolt is provided with a bore which is locked on the knob by passing through the knob with a screw, an outer wall at the top end of the lock bolt is provided with a latching plane, and the lock bolt rotates by being connected and controlled by the knob.