Pneumatic high-low creel

Abstract

A pneumatic high-low creel comprises a machine frame, and a coiling frame is supported on the machine frame through a four-connecting-rod mechanism, so that the coiling frame can be switched between a yarn feeding position and a work position. One end of an air cylinder is hinged to a lower fixed hinging shaft, air enters from the two ends of the air cylinder, the other end of the air cylinder is hinged to an upper movable hinging shaft, and when the pneumatic high-low creel is in the yarn feeding position and the work position, the air cylinder inclines at two sides of the vertical line passing the lower fixed hinging shaft respectively. The pneumatic high-low creel is further provided with a tension spring, and the tension spring is arranged between the upper fixed hinging shaft and the lower movable hinging shaft. Through the air cylinder, the sustaining force of the air cylinder can be lowered when the pneumatic high-low creel is in the work position. According to the optimized scheme, by being matched with the added tension spring, the tensioning force of the tension spring can be lowered. In addition, it is well known that the tension spring is convenient to mount and dismount, and is lower in cost and longer in service life compared with a pressure spring, and usually the tension spring does not thoroughly break down as the pressure spring. The pneumatic high-low creel has the advantages of being easy to install, economical, convenient to use and friendly to users, and saves labor when operated.

Description

Technical field [0001] The invention relates to a high and low creel in the field of textile machinery, in particular to a pneumatic high and low creel for providing outer yarn feeding packages for twisting threads of a direct twister. Background technique [0002] The high and low creel of the existing direct twisting machine is located at the top of the machine, and the panel for storing the yarn creel can be high or low, which is the so-called high and low creel. An elastic support pad is attached to the panel to prevent the strands of the end face of the feeding yarn package from falling off. The high and low creel is equipped with a creel thread tensioner and a self-locking mechanism, which can be self-locked in the low position, so that the creel can be replaced with a package. For example, CN1453200A discloses the following scheme. There is a cylinder that can receive compressed air at both ends, and the two ends of the cylinder are respectively fixed on the two opposite ...

AI Technical Summary

Problems solved by technology

The existing four-bar linkage mechanism adopted by this high and low creel is a parallelogram four-bar linkage mechanism with equal opposite sides. Its obvious disadvantage is that the high position of the creel is relatively low and the low position is relatively high, which is difficult for yarn changers. The operation is inconvenient

The lower position of the creel creates potential safety hazards for tall yarn changers; while the higher position of the creel creates obvious operational difficulties for short yarn changers

In addition, the gas spring used in this case has higher installation requirements, and its service life is shorter than that of ordinary springs. If the gas spring fails due to air leakage and other reasons, the gas spring will not be able to play a supporting role and can only be replaced with a new one. However, due to installation requirements High, it is inconvenient to replace, and the cost of the air spring is relatively high, so using this air spring will bring inconvenience to the user

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