SU368133A1 - MECHANISM FOR SUBMITTING ROLL TAPE IN WELDING MACHINES AND THEIR SIMILAR MACHINES - Google Patents

Description

one

The invention relates to a device for feeding from a roll of tape wrapping material with pre-applied labels and can be used in newly designed wrapping and packaging machines with the centering of the picture or text of the label on the wrapped product.

Known feeder packing tape in packaging machines for ed. St. No. 225761, consisting of feed rollers with a drive shaft and a device for centering a pattern, including a sensor for reading tags or performing elements of a pattern, a synchronizer, a contactless logic circuit and a correction motor controlled by the logic circuit.

The proposed mechanism allows for two-way mismatch correction, increasing the speed and accuracy of centering the picture or label text.

This goal is ensured by the fact that the roll tape feed mechanism is equipped with a tape feed interlock sensor, the output of which is connected to the channel input to speed up a logic circuit that prevents the occurrence of a false accelerating effect of a correction motor in blocking conditions.

When blocking the supply of wrapping material, for example, in the absence of a wrapped product, the sequence of alternation

The signals at the input of the logic circuitry are disrupted, since due to the cessation of tape wrapping material with tags, there is no signal from the tag sensor following the deceleration synchronizer signal, which is perceived by the logic circuit as a tag lag, in which the correction engine is enabled to accelerate the mismatch . During the blocking time of the wrapping material supply, which in real conditions lasts no less than the time of one cycle of the wrapping machine, the correction motor manages to accelerate and, in the next cycle after the end of the blocking cycle, quickly eliminates the mismatch in case the tag lags in sync with the position synchronizer when acceleration is required correction. In this case, the normal operation of the mechanism is not disturbed.

However, after blocking the wrapping material, the tag may even be ahead of the common-mode position.

In this case, retardation is required. But over the next

blocking the wraparound cycle until the logic circuit develops a control action that corresponds to the actual nature of the error and the order of alternation of the synchronizer signals and

tag sensor, corrective engine

instead of slowing down the wrapping tape, it accelerates it, further increasing the mismatch, and only in the second cycle after the blocking begins to work in accordance with the actual mismatch, it slows down and then reverses.

The drawing shows the proposed mechanism and the flow chart of its control.

The mechanism contains feed rollers 1, differential gear 2, self-braking transmission 3, reversible correction motor 4, deceleration synchronizer with light source 5 and sensor 6, acceleration synchronizer with light source 7 and sensor 8, common sector mask for both synchronizers, a tag sensor with a light source 10 and a sensitive element 11, a two-channel logic circuit with channel 12 "slow down and channel 13" speed up, a blocking sensor 14.

Roll tape 15 with marks 16 is fed with rollers / to spinning knife 17. The rollers are driven from the machine through differential gear 2. Sector mask 9 with an adjustable angle of mortar is fixed on the same shaft with knife 17 and during rotation of the latter alternately interrupts the flows falling elements 5 and 5. The signals of synchronizer element 6 are "accelerated" to the corresponding channels 12 and 13 of the logic circuit. The signal of the sensing element 11 of the sensor tags is supplied to both channels of the logic circuit, and the signal of the sensor blocking 14 - in the channel 13 of the logic circuit.

Depending on the magnitude and mismatch sign (advancement or lag of the ribbon from the common-mode position), the logic circuit produces a "slow down or accelerate" signal that controls the direction of rotation of the correction motor 4. In a loop with blocking the supply of roll tape 15 in the absence of the product being packaged, the increase in the speed and accuracy of the centering of the image or text following the blocking cycles, the inhibitory signal of the blocking sensor 14 excludes the occurrence of a control action "accelerate and turn on ix correction motor 4 to perfect mismatch nonexistent channel "accelerate. The correction signal "to accelerate can occur only in the absence of blocking the supply of the tape 15 wrapping material.

In the absence of a mismatch, signals on both outputs of the logic circuit are missing, and the correction motor is stationary.

Subject invention

The feeder roll tape in wrapping and the like machines on the bus. St.

No. 225761, characterized in that, in order to block the supply of the tape of packaging material and at the same time increase the speed and accuracy of centering the pattern or text of the label, it is equipped with a sensor

blocking the supply of the tape, the output of which is connected to the input of the channel “to accelerate the logic circuit.