Yarn feeding device with photoelectric detection function

Abstract

The invention relates to a yarn transporting device with the function of photoelectric detection, which comprises a motor which is controlled by a control circuit, a detector and a yarn storage device (1) which is driven by the motor. The detector comprises a pair of launching devices (3), a pair of receiving devices (4) and a scanning area which is provided towards the surface of the yarn storage device (1). The launching devices (3) are arranged on one side of the yarn storage device (1), and the receiving devices (4) are arranged on the other side of the yarn storage device (1) relative to the launching devices (3). Compared with the prior art, the invention detects through the cooperation of the launching devices and the receiving devices, the receiving devices can not receive signals when yarns exist on the yarn storage device, and the receiving devices can receive signals when no yarns exist on the yarn storage device, the detecting method is very direct and simple, the detecting result is direct and clear, and the control circuit which is connected with the receiving devices can control the rotating and stopping of the motor only according to the existing and non existing of output signals of the receiving devices, and the control circuit is turned to be very simple, which is beneficial for production and manufacture.

Description

technical field [0001] The invention relates to the technical field of yarn feeding devices in knitting machines, in particular to a yarn feeding device with a photoelectric detection function. Background technique [0002] The yarn feeding device is an important part in the knitting machine, which mainly includes a motor-driven yarn storage device. In recent years, with the rapid development and widespread application of large circular knitting machines, whether the yarn feeding device can always ensure that there is yarn in the yarn storage area on the surface of the yarn storage device during the rapid operation process, or prompt the yarn storage device in time Whether there is no yarn in the yarn storage area on the surface, so as to feed yarn automatically or manually in time, is one of the important factors that determine the quality of the fabric woven by the circular knitting machine. Artificially checking whether there is yarn on the surface of the yarn storage de...

AI Technical Summary

Problems solved by technology

Artificially checking whether there is yarn on the surface of the yarn storage device of the yarn feeding device will greatly increase the production cost, which is very laborious, and once a large number of yarn feeding devices are managed at the same time, the probability of errors will increase, and then it cannot be guaranteed. Therefore, with the rapid development of industrial automation, manual detection has been gradually replaced by intelligent automatic detection devices

[0003] At present, there are already many yarn delivery devices that can automatically judge whether there is yarn in the yarn storage area on the surface of the yarn storage device, such as the Chinese utility model patent "A Kind of Device with Photoelectric Detection Function" with the patent number ZL200520012996.4 (notification number CN2808954Y). Yarn Delivery Device", which discloses a yarn delivery device using a photoelectric detection method, which includes a motor controlled by a control circuit, a yarn storage device driven by the motor, and a detector connected to the control circuit, wherein the yarn storage The detector is surrounded by a plurality of grids arranged vertically, and the detector faces the scanning area provided on the surface of the yarn storage device. The yarn delivery device obtains the target output signal by comparing the detection signals obtained by the plurality of detectors respectively. According to the value of the target output signal, it is judged whether there is yarn in the scanning area provided by the surface of the yarn storage device. Therefore, the control circuit using this photoelectric detection method needs to include at least a differential amplifier and a central processing unit that can control the drive motor to stop. circuit, which makes the control circuit of the yarn feeding device more complicated, which will increase the production cost and is not conducive to mass production

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