Patent MY-190929-A (MY)
Title: Pipe coupling clamp for loosening prevention
Inventor: Bukryong CHO
IPC: F16B2/06
Filed: 2018-02-13
Abstract: In a pipe coupling clamp for loosening prevention (500) formed of stainless steel, a first clamp (200) and a second clamp (300) which are semicircular ring members opposite to each other are rotatably coupled by a coupling block ( 330), a fastening groove ( 2 91) in which a washer locking sill (290) and a locking protrusion window (279) are formed and which has an outer circumferential surf ace opened is formed at one end of the first clamp (200), a clamp bolt (150) is rotatably coupled to one end of the second clamp (300), a loosening-prevention nut (100) in which a plurality of loosening-prevention gears ( 120) are formed on an outer circumferential surface (450) thereof is screwed to the clamp bolt (150) rotationally inserted into the fastening groove (291), and a long penetration hole (280) which communicates with the locking protrusion window (279) is formed to penetrate both side surfaces. The pipe coupling clamp includes: two fixing holes (248, 249) that are formed to penetrate from an outer circumferential surface ( 450) of the first clamp (200) to the long penetration hole (280); a first fixing pin (250) and a second fixing pin (260) that are inserted into the fixing holes (248, 249); a clamp groove (405) in which a pattern having a height variation is formed on a clamp groove side wall (470) formed at edges of an inner circumferential surf ace ( 4 00) extending in an arc shape, a width between the opposite side walls in one end portion, an intermediate portion, and the other portion varies in three non-contact areas (410) of a semi-elliptic pattern with a constant width from top to bottom and two contact areas ( 420) of a triangular pattern with a decreasing width from top to bottom which are disposed among the non-contact areas (410); a stopper (275) that is disposed in the long penetration hole (280) and uses the first fixing pin (250) as a support pin with top and bottom surf aces thereof in contact with the long penetration hole (280); and a driving mechanism of the stopper (275) that causes the stopper (275) to rotate about the first fixing pin (250) and causes the locking protruding portion (274) of the stopper (275) to move outward from the locking protrusion window (279) and to be inserted into the loosening-prevention gears (120) of the loosening-prevention nut (100) such that loosening of the loosening-prevention nut (100) is prevented. The driving mechanism of the stopper (275) locates a torsion spring (27 3) including a coil portion (272) in a central part thereof in a space formed by a lower end sill portion of the stopper (275) and the bottom of the long penetration hole (280), couples and fixes the coil portion of the torsion spring (273) to the first fixing pin (250), brings one end of the torsion spring (273) into contact with a wall of the lower end sill portion, brings the other end of the torsion spring (273) into contact with a wall of the long penetration hole (280), rotates the locking protrusion portion (274) about the first fixing pin (250) using the torsion spring (273) with movement of a protruding portion protruding from both side surfaces of the stopper ( 27 5) such that the locking protruding portion (274) moves outward from the locking protrusion window (279), and is locked to an opening edge (285) of the long penetration hole (280) to stop the rotation such that the locking protruding portion moves only a predetermined distance.  FIG. 5