SU1420349A1 - Device for measuring length of moving articles - Google Patents

Abstract

FIELD: forestry and timber transshipment technology. The goal is to simplify the design and improve accuracy by eliminating the limitation of the pitch of the installation of phototops. When the input photostyle is overlapped with the front edge of the shortened product, it triggers relay 7 and, using contact 7.1, switches on the preparatory relay 13, which stands on self-locking. Contact 13.2 prepares an executive relay circuit 14. When the second product is encoded from the zone of the input photo-gate, regardless of the state of the output photo-gate, it closes pin 3.3 of the photo-input relay and turns on the executive relay 14, which contacts self-locking via pin 14.1. Contacts 14.2 and 14.3 send a command to the executive bodies. Relay 14 is disconnected by a pushbutton switch 15. The circuit returns to its original state. 2 Il. i WITH

Description

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The invention relates to forestry and timber transshipment techniques and can be used on conveyors with longitudinal feeding of round timber for detecting and sorting shortened logs that do not fit in the lower limit of the standard tolerance.

The goal is to simplify the design and improve accuracy by eliminating the limitation of the pitch of the installation of phototops.

FIG. Figure 1 shows the layout of photo-cameras; in fig. 2 - electrical device diagram.

The device consists of input and output photographs 1 and 2, located at a distance equal to the threshold of a controlled length, relay 3 and 4 of the cutters, the secondary signal front of the product, including the normally closed Ki.iHTaKT 3.1 normal ra:; 1 (Kiut1 contact 3.2, normally closed contact 4.1, normally razom.rsioy contacts 3.3, 4.2, relay l,) 1T 1-line capacitor 6, relay 7, remistor 8, normally open-pin 5.1, relay 9 bypass capacitor 10, resistor 11, relay 12 , preparatory relay 13, executive relay 14, normally open end Acts 9.1, 7.1, 13.1, 13.2, 14.1, 14.2, normally locks kennel KO1 bars 12.1, 14.3 and pushbutton 15.

The device p; 1 works as follows.

When two standard-length products are moved in series, the executive relay 14 does not turn on. When the front tag of the first product is not yet intersected by the input photostep 1, relays 5 and 9 are turned on, since pins 3.1 and 4.1 are in the closed state. When the end product of the first photostart 1 overlaps, relay 3 is triggered, contact 3.1, turns on the relay, contact 3.1 turns off relay 5, but due to capacitor 6 and resistor 8, relay 5 turns off with a time delay, as a result of which relay 7 is short in comparison with the operation time photostore relay 3. Contact 7.1 switches on preparatory relay 13 via contact 12.1, which through its contact 13.1 is self-locking. Pin 13.2 of the preparatory relay

13 prepares the actuating relay 14, which does not turn on, since the pin 3.3 is in the open state until the first product leaves the zone of the input photo-gate. When the front end of the first product enters the area of the output photocell, relay 12 triggers for a short time and disconnects preparatory relay 13 with its contact 12.1. When the input photogallery 1 is blocked by the front end of the second product, the situation repeats and there is no prerequisite preparatory relay 13 was turned on, and input photo relay 3 was turned off.

In the case of sequential movement of a standard and shortened product, the sequence of switching on the relay when passing through the phototools of the product is the same as described above. an executive relay circuit 14 is prepared. When the second

products from the zone of action of the photocell 1, regardless of the state of the output photocell 2, closes the contact 5.3 of the relay of the photoelectric gateway and actuates the relay 14, which by means of the button 14 switches to self-locking by contact 14.1. The contacts 14.2 and 14.3 give the command to the executive bodies. Relay 14 is disconnected by a pushbutton switch 15. The circuit returns to its original state.

Claims (1)

Invention Formula A device for controlling the length of moving articles, containing an input and output photostrip, with a relay and a product detection unit, characterized in that, in order to simplify the design and improve accuracy, the product detection unit is configured in a set of parallel connected circuits, two of which are In series connected normally closed contact, relay, capacitor-shunted. 31420349 and a resistor, and the other two circuits are from a but open contact, a relay, and normally connected normally open normally connected contacts, 7