| 摘要 |
FIELD: instrument making.SUBSTANCE: invention relates to mechanization of drawing operations. Device for hatching has triangle with projection in form of pin arranged in cantilever relative to triangle and facing downwards free end, guide element and two limiters of motion of triangle in form of L-shaped plates, one of which is fixed, and other one is movable to control distance between bar lines. Guide element is made in form of rectangular plastic plate, on which there are fixed and moving stoppers of movement of triangle, at that movable limiter of motion of triangle is provided with locking mechanism, two scales to establish distance between lines of hatch, one scale has price one division of 1 mm and is fixed on plate, and other scale with ten points and scale one division of 1.9 mm is joined with movable stopper motion triangle and conversion table clearance between jaws both limiters of motion triangle depending on distance between two adjacent bar lines and angle of their inclination to horizontal line. Locking mechanism of movable limiter comprises two horizontal metal plate, locking screw, two screws with countersunk heads and two screws fitted on tubular props with cutouts in lower part, upper plate by means of screws and tubular posts articulates with guide plate, and lower plate has shaped cutouts made for tubular posts and is located in gap between top of movable limiter and top plate.EFFECT: device has simple design and can be made at home and used by high school and secondary education students, as well as elderly involved in recreational design, development of rationalisation of sentences and inventions, but not holding computer technology drawing.3 cl, 13 dwg |
