CS211896B1 - Knob hinges for grinding and polishing jewelery stones - Google Patents

Abstract

The invention solves the problem of simplifying the rotation of the side when adjusting the cutting angle of jewelry stones by providing a hole in the rotatable side for a through-hole, threaded onto the hinge pin of the flap and tightened with a lock nut onto the front surface of the flap.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The invention relates to a hinged flap of a machine for grinding and polishing jewelery stones, in which the adjustment of the pivotable side with respect to the flap adjusts the hollow angle of the jewelery stones.

Hitherto known flaps hinges of these machines have a swiveling shoe for adjusting the cut angle of the jewelery stones tightened by the lock nut of the peg ^{1 of the} flap to the flap face. Before turning the fifth wheel · it is necessary to loosen the lock nut. Due to the friction in the threads, the suspension pin is loosened and thus an undesired play is created, which must be subsequently removed by adjustment. This adjustment of the play is laborious because, due to the flexibility of the support device of the flaps, when adjusting the play on one flap, the play in the hinge pins of adjacent flaps is affected.

The aforementioned drawbacks are eliminated by the flap hinge of the machine for grinding and polishing jewelery stones according to the invention, which is based on an embodiment of a swiveling hinge that is provided with an opening for a through bush slid onto the flap hinge pin and tightened with a lock nut on the flap face.

By repairing the hinged hole for the through sleeve, which is threaded onto the flap hinge pin and tightened with the lock nut to the flap end face, it is possible to rotate the side for adjusting the cut angle of the jewelery stones without affecting the Adjusted Clearance in the flaps hinge pins. This will reduce the adjustment time (cut angle (jewelery stones on flaps without reducing the accuracy of the stones produced).

In the accompanying drawing, there is shown an exemplary embodiment of a flap hinge of a machine for grinding and polishing jewelery stones according to the invention, wherein FIG. 1 shows the flap hinge in a top view of the flap and FIG. 2 shows the flap hinge in section AA; guided by the hinge pin axis.

The flap 1 (Figs. 1, 2) is hinged by means of a hinge pin 2 with a ball end 3 and a hinge sleeve 4 on the flap carrier 5. The hinge pin 2 is secured against rotation by tightening the lock nut 6 on the through sleeve 7. The rotatable side panel 9 is rotatably mounted on the through-sleeve 7 through a modified opening 10 and tightened through the circular slots 11 to the front surface 8 of the flap 1 by fastening screws 12. The end of the rotatable fifth wheel rests against the stop on the flap support 5.

Rotation of the side plate 9 with respect to the flap adjustment angle 1 is performed by loosening the fastening screws 12, holding the side plate at its end on the stop of the flap carrier 5 and turning the flap 1 in the ball bearing 3 of the hinge pin 2 together with 7 and adjust the desired cut angle of the jewelery stones. After the fastening screws 12 have been tightened, the angle of the cut can be di-adjusted in a known manner.

Claims (1)

SUBJECT Flap of machine flap grinding and polishing machines (stones having a rotatable fifth wheel), characterized in that an opening (10) for a through bush (7) is provided in the rotatable fifth wheel (9). OF THE INVENTION threaded onto the hinge pin (2) of the flap (1) and tightened with the lock nut (6) to the face (8) of the flap.