SU1164755A1 - Device for accounting parts transferred by conveyer - Google Patents

Abstract

DEVICE FOR ACCOUNTING OF DETAILS MOVED BY CONVEYOR-, ROM, containing two photosensors, the outputs of which are connected to the input of the corresponding pulse generator, waiting for the multivibrator, the output of which is connected to the first input of the element I, the output of which is connected to a counter that is different in order to increase accuracy of counting by enabling the counting of thin-walled parts mounted on plugs, whose transverse dimensions are commensurate with the transverse dimensions of the parts, an EXCLUSIVE OR element is introduced into it, cat inputs They are connected to the outputs of the pulse formers, and the output is connected to the second input of the element I, the photosensors are installed in a vertical plane perpendicular to the direction of movement of the parts, one of the photosensors is set at the level of the pin and the other at the level of the part. C5 N sd sp

Description

The invention relates to automation and can be used in counting parts moving to the counting position on pins, for example, thin-walled bushings used in the manufacture of plastic seals. There are known devices for recording the clamping parts, which contain two photosensors for the presence of an object, a coincidence circuit, a pulse shaper, a recording unit and a speed setting unit I. These devices cannot be considered thin-walled parts moving on the pins, since the transverse dimensions of the pin and parts are commensurate and difficult identify response pulsed signals from photo sensors. Closest to the invention is a device for recording moving objects, which contains two photosensors, and shapers connected to their outputs. the outputs of which are connected to the first and second inputs of the control trigger and the OR element, the output of the trigger, are connected to the first input of the AND element, and the output of the OR element through the waiting multivibrator to the second input of the AND element whose output is connected to counter 2. This device accurately reads single and docked parts moving on the conveyor. However, if the moving thin-walled parts are installed on the carrier pin and the areas of their cross sections are comparable, even in the absence of the part, the photosensors overlap with the plugs. This leads to the triggering of photosensors in the absence of parts and, consequently, the impossibility of counting children, installed on the bearing bars. The purpose of the invention is to increase the accuracy of counting by allowing the counting of moving parts mounted on pins whose transverse dimensions are commensurate with the lateral dimensions of the parts. The goal is achieved by the fact that a device for recording moving parts contains two photo sensors, the outputs of which are connected to the input of the corresponding pulse generator, the waiting multivibrator, the output of which is connected to the first input of the element AND whose output is connected to the counter, is introduced the element EXCLUSIVE OR, the inputs of which are Connected to the outputs of the pulse formers, and the output to the second input of the element I, the photosensors are installed in a vertical plane perpendicular to the direction of movement of the parts, one and photocells set at the pin, and the other - on the part level. FIG. 1 is a block diagram of the device; in fig. 2 shows the structure of the receiving part of the device; in fig. 3 is a section A-A in FIG. 2. The block diagram of the device contains photo sensors 1 and 2, shapers 3 and 4 pulses, element 5 EXCLUSIVE OR, standby multivibrator b, element 7 AND, counter 8. Receiver part of the device contains part 9, pin 10 and cassette 11. Outputs of photo sensors 1 and 2, respectively, through shapers 3 and 4 pulses are connected to element 5 EXCLUSIVE OR, the output of which is connected to the second input of element 7 I, and through the waiting multivibrator 6 to the first input of element 7 And, the output of element 7 I is connected to counter 8. Parts 9 mounted on pins x 10 cassettes 11. Device works as follows. When a pin 10 with a detail 9 appears in the counting position, the area of the photo sensor 2 located on the part LEVEL is overlapped. Photo sensor 1 is open at this time. Signals from both photosensors, proportional to the illumination of their areas, are fed to the formers 3 and 4. The output of the imaging unit 3 remains high, the output of the imaging unit 4 shows a low signal level, the first input of element 5 EXCLUSIVE OR is a high signal level , at the second input of element 5 - the lower level. Element 5 is triggered, at the output of which a high signal level appears. The waiting multivibrator 6 does not start, so a low signal level remains at its output, which is applied to the first input of element 7 AND, at the second input of which from the output of element 5 EXCLUSIVE OR high signal level is applied. At the output of element 7 I, the level is low and the counter 8 remains in the same state. Upon further movement to the counting position, the pin 10 with part 9 overlaps the photo sensor 1, which is located above the part at the level of the pin 10. A low signal level appears at the output of shaper 3. At the same time, the output of the driver 4 and, accordingly, at the second input of the element 5, the signal level remains low. At the output of element 5, a low signal level appears. The waiting multivibrator 6 is triggered by a negative voltage drop. At the output of the standby multivibrator 6, a high level signal is generated. At the next moment in time, when the pin 10 is moving, the photo sensor 1 opens. A high signal level appears at the output of the imaging unit 3. The photo sensor 2 is closed at this time, and the output level of the shaper 4 remains low. At the first input of element 5 - a high signal level, at the second input - a low level. At the output of element 5, a high level of signal appears, which is applied to the second input of element 7I. At the first input of element 7 and at this time there is also a high level of signal, since the pending multivibrator 6 is in a steady state for a certain time after launch negative voltage drop. At the output of element 7, a high signal level appears and counter 8 is activated. If, while moving the cassette 11 on one of the pins 10, the parts 9 do not appear, then the photo sensors I and 2 overlap with the pin 10 simultaneously. At the outputs of the formers 3 and 4 and respectively at both inputs of element 5, EXCLUSIVE OR, low levels of signals appear and the output / - /} state of element 5 does not change, the waiting multivibrator 6 does not start, at both inputs of element 7 And remain low levels. At the output of the element 7 - a low level and the counter 8 does not produce a false account. The device allows precise counting of moving parts mounted on guide pins, the transverse dimensions of which are commensurate with the dimensions of the parts, which increases the productivity of the manufacturing process for the manufacture of seals. The proposed device provides a reliable count of thin-walled parts with a wall thickness of about 0.1 mm.

ten.

eleven

2

iH

Claims (1)

DEVICE FOR ACCOUNTING PARTS MOVING CONVEYOR-, ROM, containing two photosensors, the outputs of which are connected to the input of the corresponding pulse shaper, waiting for the multivibrator, the output of which is connected to the first input of the element And, the output of which is connected to the counter, characterized in that, with In order to increase the accuracy of counting by enabling counting of thin-walled parts mounted on pins whose transverse dimensions are commensurate with the transverse dimensions of the parts, an EXCLUSIVE OR element has been inserted into it, the inputs of which connected to the outputs of the pulse shapers, and the output to the second input of the And element, the photosensors are installed in a vertical plane perpendicular to the direction of movement of the parts, one of the photosensors is installed at the pin level, and the other at the part level.