SU881679A1 - Device for automatic interlocking of article feeding mechanism in wrapping machine - Google Patents

Description

The drawing shows a diagram of the device.

The device for automatically blocking the product feed mechanisms in wrapping machines contains an electric drive 1, a product presence sensor, made in the form of two coaxial nozzles 2 and 3, located on both sides of the wrapper 4 of product 5, one of which (nozzle 2) is stationary, and the second nozzle 3 through the deflecting lever 6 and the cam 7 is connected to the electric drive 1, the fixed nozzle 2 is connected to the pressure source 8 through sequentially installed starting pneumatic valve 9, the control input of which is connected through the starting lever 10 and the cam 11 electric drive 1, and pneumotumboiler 12. The device also has a logic unit connected to the product presence sensor and containing an actuating pneumatic valve 13, the control input of which is connected to the second nozzle 3, and a pneumatic electric converter 14 connected to it, connected to the control input of the electric drive 1. The actuator 1 is connected to the mechanism 15 of the feed product.

The device works as follows.

In the initial position, the pneumotumbler 12 is turned on, the starting pneumatic valve is turned off, the nozzle 3 is retracted from the nozzle 2. Using the electric drive 1, the product 5 to be wrapped, for example, a set of cartridges 13 of explosives used in the mining industry, together with the wrapper 4 is fed using mechanism 15 supplying the product to the nozzle zone 2. At the same time, the cams 7 and 11 are triggered. The deflecting lever 6, moving under the action of the deflecting cam 7, brings the movable nozzle 3 to the fixed 2, while clamping the wrapper 4 and the coolant Choke 11 through the lever 10 includes a pneumatic valve 9.

The pneumatic signal through the starting pneumatic valve 9 and the pneumatic reel 12 is supplied to the fixed nozzle 2. In the presence of a wrapper 4, the mobile 3 and the fixed 2 nozzles are disconnected. At the input of the pneumatic valve 13, the pneumatic signal is not received, the shutdown of the actuator 1 does not occur.

After the bag has been molded during the subsequent action of the actuator 1 of the product supply mechanism 15, the start-up sensor cam 11, the product turns off the start-up pneumatic valve 9, and the lever 6, moved by the action of the cam 7 synchronously with the cam 11, retracts the movable nozzle 3 from the stationary nozzle 2.

The formed package with a set of cartridges of explosives is fed through the mechanism 4 for feeding the product to the next position. The cycle described above is repeated.

In the absence of a wrapper 4, an emergency situation is created. The movable 3 and the fixed 2 nozzles are interconnected. The pneumatic signal comes from the starting pneumatic valve 9 through the pneumotumboiler 12, the nozzles 2 and 3 and the actuating pneumatic valve 13 to the pneumoelectric transducer 14, at the output of which an electric signal appears that diverts the electric actuator 1.

After supplying the wrapper 4 to remove the palletizing machine from emergency operation, the movable 3 and the stationary 2 nozzles are disconnected by the wrapper 4. In this case, the pneumatic signal to the pneumatic converter 14 is removed. The electrical signal at its output is missing, which causes the inclusion of the actuator 1 and the restoration of normal operation of the machine.

The use of the invention makes it possible to prevent the occurrence of an emergency during the packaging of explosive products.

Claims (2)

1. USSR author's certificate W 368133, cl. B 65 B 57/08, 1970. 2. Authors certificate of the USSR 225760, cl. B 65 B 57/04, 1966 (prototype). R 12