SU24684A1 - Tool for pulling the sieve on a flat frame - Google Patents

Description

The invention aims at the currently practiced tensioning of the sieve on the frame by hand, by mechanical replacement.

The device, shown in the vertical section, for folding the sieve into a flat frame consists of two glasses / mounted on stands 2 attached to the ends of the table 3. The glasses 1 are hollow cylinders used to place helical springs4 on them loosely supported with the ends of the beam 5 with the elastic lining on it. b. The beam 5 has a displacement in a vertical plane, at which its ends, resting on the springs 4, enter the cups / through the slots 7 and move along them as along guides. Above the described beam 5 there are tavriks 8, covered with elastic one. Covering 9,

The brand, also included in slots 7, is suspended from the pressure bolts JO so that, when the bolts rotate, it can move in a vertical plane.

When using the proposed device, the sieve to be tensioned is // prefixed to the edge J2 of the sieve frame / 3. Tension is as follows. Frame 13 places table 3 close to stubborn

14. The loose edge of the sieve is passed between two elastic plates 6 and 9, then bolts 10, through Tavrik 8, the sieve // is pressed into the beam 5 together with the upper part of the skid 9, due to which elastic and uniform pressing and tensioning occur sieve 11 along the entire length at the same time. In case of excessive tension of the screen, it is prevented by springs 4y on which beam 5 freely rests, which can move in a vertical plane.

The subject matter of the invention.

A device for pulling the sieve onto a flat frame, characterized by the use of two spiral springs 4 inserted into them, glasses / placed on the work table 3 with supports 2 and in the slots of which are placed the ends of the beam 5 fitted with a longitudinal notch, which are wrapped with elastic lining, serving for, clamping the tensioned sieve // in it with the help of a wrapped elastic lining and 9 T-5, moved vertically by a pressure bolt 10,