RU1832178C - Graph plotter pen holder - Google Patents

Abstract

The invention relates to instrumentation, in particular to plotters. The aim of the invention is to simplify the device and increase the reliability of fixing the pen. The device for holding the pen 1 automatically changed during operation consists of a cell 2 with a fixed rear wall 3 and two spring-loaded clips 9 of a crescent shape 4. The axis of rotation of each of the clamps 4 is the mating line 7 of the forming groove 8, the housing 5, the cell 2 and the narrow end of the clamp 4. 3 yl.

Description

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The invention relates to instrument making, in particular to a plotter.

The aim of the invention is to simplify the device and increase the reliability of fixing the pen.

SUMMARY OF THE INVENTION FIG. 1 shows a general view of the device, and in FIG. 2 and 3 views explaining the work when changing the pen.

The device for holding the pen 1, which is automatically changed during operation, consists of a cell 2 with a fixed back wall 3, which serves as a fixed stop for the pen and two spring-loaded clips 9 of the clamps 4, the outer and inner surfaces of the clamps 4 are made with a radius of the same size with a center offset, which ensures its sickle shape. The optimal clamping length, which determines the smallest dimensions of the housing 5 of cell 2, depends on the radius that the clamp is made on, the position of the center of the radius and is chosen to increase the reliability of fixation of the pen, from the condition of holding the pen, which, as a rule, has a cylindrical shape at three points 6 Being the vertices of an equilateral triangle shown in broken lines in the drawing.

The crescent-shaped clamps 4, spring-loaded with a spring 9, with their free thickened ends are directed inside the chamber of the cell 2. are inclined to each other and enclose the pen 1 located in the cell 2, thereby counteracting the movement of the pen during operation from the rear wall 3 of the cell. The axis of rotation of each of the clamps 4 is the mating line 7 of the forming groove 8, the housing 5, the cell 2 and the narrow end of the clamp 4.

The pen fixation, due to the spring-loaded clamps and their crescent shape, provides reliable pen retention while recording and automatic replacement of the multi-pen plotter pen at the right time.

Automatically, according to a given program, the magazine with cells 2, each of which has a holding device with pen 1, moves in the direction parallel to the plane of the carrier to a fixed carriage that is identical to the magazine, but empty cell 2 with the same holding device is a distance sufficient to change the pen . The clamps 4 of the empty cell 2 of the carriage touch the pen 1 in one of the cells 2 of the mobile store and, as they move closer together, slide over the surface of the pen 1, covering it and overcoming

spring resistance 9, push apart the clamps 4 of the cell 2 of the store. The movement takes place until the stop of pen 1 in the rear wall 3 of the cell 2 of the carriage, as a result of which the clamps 4 of the cell 2 are spread apart and are no longer

have a restraining effect on pen 1. When the pen rests on the rear wall 3 of cell 2 of the carriage, pen 1 is fixed to the retaining device and the clips 4 of the magazine store slide backwards from the outer surface of the carriage clamps 4 and, under the action of the spring 9, rest.

Retention device design

pen allows you to improve the manufacturability of its manufacture due to the fact that:

The smooth, sickle-shaped form of the clamps, without teeth, simplifies their design, and as a result, simplifies the equipment for making clamps.

-when constructively solving the axis of rotation of the clamp, which is the interface between the forming grooves of the cell body and the narrow end of the clamp, assembly technology is simplified, since the production of the rotation axis in the clamp and its fixing in the cell body are not required.

Instead of four grooves under the clamp axis, only two are made in the cell body, which

also leads to a simplification of the design of the cell body and the tooling for its manufacture. The optimal length of the clamps determines the smallest dimensions of the cell, while ensuring reliable fixation of the pen,

Formula. A device for holding a pen in plotters, containing a cell with a fixed rear wall for stopping the pen

and installed in the grooves of the cell body with the possibility of rotation two spring-loaded clamps, inclined to each other with free ends to hold the pen when it moves from the back wall of the cell,

characterized in that, in order to simplify the device and increase the reliability of the fixation of the pen, the clamps are made in the shape of a crescent with wide open relatively fixed ends

ends, the axis of rotation of the clamps corresponds to the mating line of the grooves of the cell body and the narrow end of the clamp, and the inner and outer arches of the clamps are made with a radius equal to the diameter of the circumference of the pen at the point of contact with the clamps, with the center shifted along the horizontal axis. twice this offset on the vertical axis.

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