SU682917A1 - Paper feed mechanism for a character printing device - Google Patents

Description

and punched tape, which often tears, and the complexity of its design.

The purpose of the invention is to secure the reliability of the paper feeding mechanism.

The goal is achieved by introducing a cam, a gear drive with a gear ratio IICM 3: 1 with a drive shaft, and microswitches installed with a possibility of contact with the cam.

FIG. 1, 2, 3 there is a paper-feeding mechanism for an ADC with microswitches; FIG. Figures 4 and 5 show the electric circuit of switching the microswitches.

The paper feed mechanism for an ADC contains a drive shaft /, a drive Hiectern 2 connected to an electromagnetic clutch 3, toothed bushes 4, a disk 5 that is associated with the photosensor in the form of a photodiode 6, opposite which there is a light source in the form backlight lamps 7 included in the cytine circuit, cam 8 connected by a gear (driven 9 and driving 10 gears) to the drive shaft I, and microswitches: // and 12 installed so as to be in contact with the cam 8. Vedom gear 9 and cam 8 are mounted on axle 13 which is on Figure 14, on which microswitches 11 and 12 are installed, pr: That is, the microswitch // is connected consequently to the power supply circuit of the photodiode 6 illuminator bulb.

The paper feeding mechanism without the entered elements works as follows.

The rotation of the drive shaft / with toothed bushes 4 and the movement of the paper take place after the computer signal to the ADC receives the signal "Enable transport, at which the electromagnetic clutch 3 activates, including drive gear 2 with the drive shaft /.

A disk 5 with holes on its cylindrical surface is mounted on the drive shaft /. When the disc hole is under the bulb 7 - under the light of the photodiode 6, the computer receives a signal "Interval processing and a computer command" Switching off the transport causes the electromagnetic clutch 3 to open. At the same time, the drive gear 2 and the drive shaft are turned off (not shown) stops.

At the moment the paper is stopped, one line is printed, after which the command from the computer "Turn on transport

Electromagnetic clutch 3 is activated and the process is repeated.

Since the distance between the holes on disk 5 is the same, the spacing between the print lines is the same and the ADC prints line by line at equal intervals.

The printing mechanism using the input elements) abatat as follows.

When the drive shaft rotates /, the drive gear 10 rotates with it. For three turns of the drive shaft ./ and the drive gear 10, the paper advances toward the fold. Gear 9, meshed with pinion gear

10, taking into account the selected gear ratio of 3: 1, makes one turn on the axis 13 and opens the cam 8 switches of the microswitches // and 12 on the axis 13.

When the contacts of the microswitch 11 are opened, the power supply circuit of the photodiode 6 light bulb 7 is interrupted, the drive shaft / rotates and the paper runs continuously. The run lasts until the cam 8, which rotates together with the driven gear 9, does not release the contacts of the switch 11, which are beyond.

The power circuit of the photodiode illumination lamp, and a computer, the signal "Interval processing. Next, the paper feeder operates, as usual, at the print line at a constant interval up to that time. until

The cam 8 will again open the contacts of the microswitch 11, after which the process is repeated.

Thus, the paper feeding mechanism allows you to automatically move

paper for a certain, after a line, spacing and delay printing in a certain area of paper with the movement of this area for a specified interval. Such a zone in a paper tape is

fold.

Depending on the size and shape of the cam 8, it interacts with the microswitch //.

The larger the contact surface of the cam 8 with the microswitch //, i.e. the external arc of the cam 8, the longer the microswitch contacts are open

11, more time automatic nrogona paper and the value of the interval in the fold area.

The interval in the fold area should be positioned so that one half of the interval is above the fold, and the other is below the fold. To do this, when laying a new perforated paper tape in the ADCS, you must in a certain way expose the first sheet of the pack.

This is accomplished with the microswitch ./2 and the button 15.

When the button 15 is closed, the paper 16 relay is energized, through the contacts of which the electromagnetic clutch 5 is activated, and the drive shaft / with the pinion gear 10 begins to rotate until the cam 8 rotating together with the driven brush 9 opens the microswitch 12.

After that, a paper tape is placed on the gear sleeves 4 so that the initial fold of the first sheet coincides with the indicative risks applied to the ADC - marks of the initial installation of the front fold of the first sheet of paper.

Further, when repeatedly outputting the results of solving problems from a computer to an ADC, regardless of where the printed results of the previous task ended (at the beginning of the page, in the middle or at the end), when moving to the output of the subsequent task at the ADC, the computer operator for automatic running through the perforated the paper tape to the initial (initial) state only includes either button 15 installed on the ADC or a similar button parallel to button 15 installed on the console.

The use of the invention provides significant savings in useful machine

time (1 hour of machine time on a BESM-4M computer costs an average of 50 rubles), which is obtained by preserving the results of solving problems outputted to the ADC.

Claims (2)

1. Anisimov B.V., Chetverikov V.N. Information Transformation for Computer Information Systems, M., “Higher School, 1968, p. 307-310. 2. Drozdov E. A., Komarnitsky V. A., P Tibratov A. P. Electronic Computers. M., “Mechanical Engineering, 1976, p. 427. cfe 0-7 ; r / 7: -e / i iM- -f I SHY  . H; - | v.: L L7f .... FIG. g srig.Z - LZG / y