JPH0473223A - Fasciated spinning frame - Google Patents

Abstract

PURPOSE:To exclude a defective non-twist yarn by installing a yarn-tension detector and a spun yarn cutting cutter between a spinning nozzle and a delivery roller and cutting the yarn when the yarn tension is smaller than a prescribed level. CONSTITUTION:When the yarn tension detected by a yarn tension detector 24 placed between a spinning nozzle 2 and a delivery roll 3 is smaller than a prescribed level, a controller 26 actuates a cutter 12 to cut the spun yarn.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field 1] The present invention provides a method for removing the abnormal yarn by immediately cutting the yarn when an abnormal yarn is spun in a non-twisted or nearly untwisted state due to an abnormality in bundle spinning. This relates to a binding and spinning device that has a function to prevent the material from being wound around the package. [Prior Art] In conventional bundle spinning devices, like other general spinning devices, fiber bundles become thin or thick due to weight fluctuations of slabs or slivers during spinning or draft defects in draft devices. If this occurs, the yarn clearer detects the abnormally spun yarn, which is thinner or thicker than normal, and activates the attached cutter to cut the spun yarn, thereby preventing the abnormal yarn from being wound into the pan cage. It is common to prevent However, by blowing two types of high-speed airflows swirling in opposite directions onto the drafted S string bundle,
In binding spinning, which obtains yarn strength by winding fibers around a core an, abnormal yarns in which the prescribed Ii female winding is not performed may occur due to the rotation of the fiber bundle being temporarily hindered due to contamination with dust, etc. may occur. Needless to say, such abnormal threads have extremely low strength, so they must be removed without being wound into a package. However, since the thread thickness is normal, it is important to change the thickness or size of the thread. It cannot be detected by yarn clearers equipped with monitoring sensors. In bundle spinning, the above-mentioned abnormal untwisted yarn occurs when the spinning nozzle disrupts the heating and untwisting of the fiber bundle between the front roller of the traft device and the delivery roller. Or, in that case, the "twist tightness" that occurs during normal spinning disappears or is significantly reduced, and when compared to normal spun yarn, it exits the binding spinning nozzle and is taken up by the telly roller. The 'rJs force (hereinafter referred to as yarn tension) in the state is extremely low.In other words, the yarn tension is about 6 to 15 g in the case of normal yarn, or about For this reason, in conventional bundling and spinning equipment, there is a risk that the yarn will be untwisted, or it will be wound up into a package as it is, causing accidents such as breakage during subsequent processing or during weaving or weaving. K Excuse or Problem to be Solved] The present invention has an object to provide a binding spinning device that makes it possible to detect and eliminate the above-mentioned non-twisting abnormality peculiar to binding spinning. Means for solving the K problem Σ A yarn tension detection device for measuring the tension of the yarn immediately after being spun from the bundled spinning nozzle and a cutter for cutting the spun yarn,
It was installed between the spinning nozzle and the chilli periloaf B, and the yarn tension was detected by operating the spun yarn cutter whenever the device detected a low spun yarn tension. K action] In the spinning machine for this purpose, when the attached yarn tension detection device detects a decrease in the yarn tension as described above,
The spun yarn cutting cutter is activated to cut the yarn. This reliably detects non-twisting abnormalities that cannot be detected by the yarn clearer and prevents them from being wound into a package. K Embodiment Σ In the illustrated embodiment, the draft device 1. Pneumatic knot spinning nozzle 2. Delivery roller 3. A yarn clearer 4, a winding device (not shown), etc. are arranged, and the structure is basically the same as that of a well-known binding and spinning device. The bundle spinning nozzle 2 is a well-known 41 type having an air injection port therein for sequentially spraying two high-speed air streams swirling in opposite directions onto the supplied drafted fiber bundle S.
It is an I-built structure and is supported by a frame 5. The yarn outlet side at the end is covered with an end member 9 of the fluff suction tube 8, except for the yarn passage port 6 and the suction tube insertion lower portion. A wedge-shaped rotating blade 10 and a fixed blade 1 are provided at the thread passing portion 06.
There is a cutter 12 consisting of 1. The rotating blade 9 has a base supported by a rotatable support shaft 13. The support shaft 13 has an arm 14 fixed thereto. Rod 15. Arm 16. Arm 17. It is connected to the solenoid 20 by a link device 19 consisting of a rod 18 and the like. Solenoid 20 is O
During normal operation of N, the rod 18 is pushed down by the action of the solenoid 20, and the arm 17 is rotated clockwise under the tension of the spring 21. The arm 17 that has rotated clockwise rotates the rotating blade 10 of the cutter 12 to the illustrated standby position via the arm 160 and the arm 15, etc., so that the thread Y can run between it and the fixed blade 11. There is. The telly roller 3 is for taking up the yarn Y spun from the nozzle 2 at a constant speed and supplying it to the downstream winding device, and is driven at the same circumferential speed as the front roller 22 of the traft device 1. Directly below it, a yarn clearer 4, which is also found in conventional spinning devices, is installed. Between the binding spinning nozzle 2 and the telly roller 3, more specifically, between the above-mentioned installation location of the cutter 12 and the guide 23 just in front of the telly roller 3, a yarn tension detection device 24, which is characteristic of the spinning device of the present invention, or a yarn The sensor part is placed in contact with the thread Y so that the tension of the thread can be measured. This yarn tension detection device 24 has such accuracy that it can identify a sudden change in the yarn tension, which is about 6 g or more at Masatomi, to about 3 g or less due to the above-mentioned cause. The yarn tension detection device 26 and the yarn clearer 4 are connected to the control table @26, and based on the input signals S1 and S2 from them, the control device 26 uses a solenoid 20°, an alarm device if necessary, and other measures against abnormal yarn. The relevant mechanism is activated to take the necessary action. Next, the operation of the spinning device will be explained. The process in which the supplied sliver S is drafted into a fiber bundle S by the draft lt1 and becomes a bundled spun yarn Y by receiving air jet through the binding and spinning nozzle 2 of the fiber bundle SS is completely different from that in the conventional binding and spinning device. The same is true. The spun yarn Y is then passed through a yarn tension detection device 24, a guide 23. Delivery roller 3. The yarn is passed through a yarn clearer 4 and wound up into a package by a winding device. When the spun yarn Y is a yarn of a particular thickness, the yarn clearer 4 detects it and the control device 24 activates the solenoid 2.
0 and stops pushing down the rod 18, the tensile force of the spring 21 is transmitted to the support shaft 13 via the link mechanism 19, causing the support shaft 13 to rotate.
Rotate the rotating blade 10 on 3 in the counterclockwise direction in the figure. The tip of the rotating rotating blade 10 and the fixed blade 11 pinches the thread Y and cuts it. At the same time, the control device 26 sets the control position for performing other measures on the related yarns necessary to counteract abnormal yarns. This is also similar to the operation of the A7 clearer in conventional spinning machines. Abnormal yarn that cannot be detected by yarn clearer 4,
In other words, the thickness of the yarn is normal, there is no wrapping on the surface or side, and there is sufficient force [1] If the yarn is not twisted, it means that there is little twist shrinkage. This means that there is no increase in yarn or force.Therefore, when a yarn with low strength is generated, the fiber bundle S in the bundle spinning nozzle 2 is It turns out that the heating is relatively small.The shrinkage of the yarn in this area becomes extremely low, and the moment the yarn tension decreases, the yarn is supplied from 1L1 and the front roller 20 at a constant speed. , the tension of the yarn Y (approximately 6 to 15!7 as described above), which had been at a constant level (approximately 6 to 15!7 as described above), is taken up at a constant speed by the telly roller 3 and decreases to approximately 3 g or less. Yarn tension detection device 21 When detecting this sudden drop in yarn tension, the control device 26 issues the same control signal as when detecting an abnormal yarn in the yarn clearer 4.As a result,
Similarly to the above, the solenoid 20 is activated, and the link 1 mechanism causes the rotating blade 10 to rotate, causing the thread Y to be cut. The cutter for cutting the spun yarn is activated when the cutter tension is detected, so that abnormal untwisted yarn that cannot be detected by the yarn clearer can be immediately detected and eliminated. This will make it possible to improve trade in bound spun yarn.

[Brief explanation of the drawing]

The drawings are schematic illustrations of essential parts of an embodiment of the present invention. 1...Draft device, 2...Bundle spinning nozzle. 3...Delivery roller, 4...Yarn clearer 9...Swivel blade, 10...Fixed blade. 12... Cutter for cutting spun yarn 24... Yarn tension detection device Patent applicant Murata Machinery Co., Ltd.

Claims (1)

[Claims] 1. A yarn tension detection device for measuring the tension of the yarn immediately after being spun from the binding spinning nozzle and a cutter for cutting the spun yarn are installed between the spinning nozzle and the delivery roller to detect the yarn tension. A binding spinning device characterized in that a spun yarn cutter is activated when the device detects an abnormally low spun yarn tension.