JPS5971433A - Method for ending yarn in open end fine spinning machine - Google Patents

Abstract

PURPOSE:To improve the percentage of success in yarn ending, by feeding a sliver just after a yarn ending machine stops in front of a unit of yarn breakage for a given time to make the tip of the sliver in an almost constant form, and ending the yarn in each unit under the same conditions. CONSTITUTION:A sliver 19 is fed just after a yarn ending machine stops in front of a unit 2 in which the yarn breakage is caused, and the tip of the sliver 19 is combed into an almost constant shape and made uniform by a combing roll 17 in the time. The yarn ending operation can be carried out in each unit 2 under the same conditions irrespective of the length of the time elapsed after the yarn breakage.

Description

Detailed Description of the Invention Technical Field The present invention relates to a spinning unit that has a spinning rotor, a feed roller, and a combing roller and that can open the spinning rotor as needed, and a yarn splicing machine that can run in front of the unit. The present invention relates to a yarn splicing method in an open-end spinning machine equipped with a spinning machine.

BACKGROUND ART In this type of spinning machine, the time from when yarn breakage occurs to when the yarn splicing operation is performed by the yarn splicing machine varies in each yarn breakage unit. Therefore, the inventor of this application
In order to investigate the effect of the elapsed time after yarn breakage on the yarn splicing success rate, an experiment was conducted using a conventional open-end spinning machine, and the results shown in the table were obtained. In this table, the prefeed time refers to the time required to operate the feed roller and feed fiber into the rotor before the yarn end reaches the fiber advancing part of the spinning rotor and splicing is performed.

As is clear from this table, when the time elapsed after thread breakage is relatively short, the success rate of thread splicing increases as the prefeed time becomes shorter; If it is long, the longer the prefeed time, the higher the yarn success rate.

Therefore, in order to obtain a high yarn splicing success rate with conventional spinning machines, it is necessary to change and set the prefeed time appropriately depending on the length of time that has passed after yarn cutting, and the mechanism becomes complicated. There is also the problem that control becomes troublesome.

Purpose This invention was made in order to solve the above-mentioned conventional problem, and its purpose is to supply sliver for a certain period of time immediately after the yarn splicing machine stops in front of the yarn cutting unit, and to supply the sliver within this period. By combing the tip of the sliver into a nearly constant shape using a combing roller, each unit can perform yarn splicing under the same conditions regardless of how long or short the time has elapsed since yarn breakage. It is an object of the present invention to provide a yarn splicing method for a novel oven-end spinning frame that can increase the yarn splicing success rate with its configuration.

EXAMPLE An example embodying the present invention will be described below with reference to the drawings.

As shown in FIG. 1, a large number of spinning units 2 are arranged in a row on a machine frame 1 of an open-end spinning machine. It consists of an opening/closing body part 5 which is pivoted on a support 4 so that the front surface of the opening/closing body can be opened and closed.

A spinning rotor 7 is attached to the rotating shaft 1 [1+6] supported by the support body 3, and during spinning operation, the outer circumferential surface of one end of the rotating shaft 6 contacts the rotor drive table 8 common to all spindles. As a result, the spinning rotor T is rotated at high speed. Further, when the opening/closing body part 5 is opened by an opener (not shown) installed on the yarn splicing machine side when yarn breakage occurs, the support body part 3 is rotated clockwise in the figure, and the rotation axis is rotated. 6 comes into contact with the braking member 10, whereby the rotation of the spinning rotor 1 is stopped.

The opening/closing body section 5 is provided with a separator 11 at a position facing the front surface of the rotor T when the opening/closing body section 5 is closed, for separating the fibers supplied to the rotor 1 from the yarn drawn out by the rotor γ. A drawer passage 12 is formed in the center of the opening/closing body part 5 and penetrates toward the top of the opening/closing body part 5 . A thread breakage detector 13 for detecting thread breakage is disposed on the pull-out passage 12, and outputs a predetermined detection signal when a thread breakage occurs.

Further, the opening/closing body section 5 includes a feed roller 15 for supplying sliver, which is operatively connected to the drive section 14 via a clutch 38.
, and a combing roller 1T for opening the supplied sliver, which is operatively connected to the drive belt 16 via a pulley 23, are supported adjacent to each other so as to be rotatable in the same direction. As shown in FIG. 2, during the spinning operation, both of these rollers 15 and 17 are rotated, and the sliver 19 supplied from the supply port 18 is transferred to the combing roller 17 by the cooperation between the feed roller 15 and the presser 2o. This Komin'l-Roller 17 was transferred to
After the fibers are opened by the metallic wire 17a wound around the rotor 1, the opened fibers are supplied into the rotor 7 by the airflow 22 generated in the fiber passage 21 based on the negative pressure inside the rotor 1, and the rotor rotates at high speed. After converging into one fiber converging section 1, the fibers are pulled out from the pulling passage 12 to the outside of the spinning unit 2 as a generated yarn while being heated.

Note that when thread breakage occurs, the clutch 38 is disengaged based on the detection signal output from the detector 13, and the rotation of the feed roller 15 is stopped, thereby stopping the supply of the sliver 19. Further, as shown in FIG. 5, when the opening/closing body section 5 is opened, the pulley 23 is separated from the drive belt 16, and the rotation of the combing roller 110 is also stopped.

On the other hand, as shown in FIG. 1, a yarn splicing machine 27 is movably supported by guide portions 25 and 26 provided above and below the machine frame 1, and the yarn splicing machine 27 is movably supported by the guide portions 25 and 26 provided above and below the machine frame 1. It stops in front of the breakage generating unit 2 and performs a yarn splicing operation to be described later. As shown in FIG. 5, a cleaning cylinder 28 installed in the yarn splicing machine 27 is provided with a cleaning device 29 containing an appropriate removal member, and is placed in a standby position on the side of the yarn splicing machine 27 during spinning operation. At the same time, when a yarn breakage occurs, after a certain period of time has elapsed after the yarn splicing machine 21 stops, it is moved to an operating position facing the front surface of the support section 3 of the spinning unit 2, and in this state, the spinning rotor 7 It is designed to remove residual fibers etc. that have adhered to the inside.

Further, as shown in FIG. 1, the yarn splicing machine 27 includes a drive roller 36 supported by a lever 37 and a suction nozzle 3.
1, a cutting means 32, a yarn feeding guide means having a pair of yarn gripping rollers 33, and the like. When thread breakage occurs, after a predetermined period of time has passed after the above-mentioned cleaning operation is completed,
As shown in FIG. 6, when the drive roller 36 reverses the package 35, the suction nozzle 31
After the yarn Y is rewound from 5 and the yarn end is cut by the cutting means 32 to make the yarn length a predetermined length, the yarn gripping roller 33 grips the cut end (in the chain line position), and the spinning operation starts. The yarn is guided to the current yarn path position (indicated by a solid line) and fed into the pull-out passage 12 of the spinning unit 2.

Further, as shown in FIG. 1, the yarn splicing machine 27 is equipped with a cylinder 41 having an electromagnet 40 attached to its tip, and when the cylinder 41 is ejected, the electromagnet 40 is connected to the lead connected to the clutch 38 in the spinning unit 2. switch 3
It is designed to face 9. In this opposing state, the electromagnet 40 is excited, thereby turning on the reed switch 39 and connecting the clutch 3B.

Next, a yarn splicing method in the open-end spinning machine configured as described above will be explained.

Now, during the spinning operation shown in FIG. 1, if the yarn Y is cut at point X for some reason, the yarn breakage detector 13 of the spinning unit 2 detects the occurrence of yarn breakage and sends a predetermined detection signal. Clutch 3B is output based on this detection signal.
is cut off, the feed roller 15 stops rotating and the supply of the sliver 19 is stopped, and the yarn splicing machine 21 stops in front of the yarn cutting unit 2. At this time, the thread breakage unit 2
Since the distances to the yarn splicing machine 27 are different from each other, the time required for the yarn splicing machine 27 to arrive varies accordingly. Therefore, as time passes, the tip of the sliver 19 is gradually combed out and the amount of fibers gradually decreases as shown in FIG.

However, in this embodiment, when the yarn splicing machine 27 stops in front of the yarn cutting unit 2, the rod of the cylinder 41 protrudes from the left to the right in FIG. is opposed to the reed switch 39 in the spinning unit 2. Subsequently, the reed switch 39 is turned on by energizing the electromagnet 40.
Therefore, the clutch 38 is connected and the feed roller 15 is operated. As a result, the sliver 19 with its tip end combed out as shown in FIG. 5 is fed into the combing roller 17. Then, the supplied sliver 19 is shaved by the metallic wire 17a as the combing roller 17 rotates, so that its tips are aligned as shown in FIG.

When the feed roller 15 is operated for a certain period of time and the operation is completed, the electromagnet 40 becomes de-energized and the reed switch 3
9 is turned off, the clutch 38 is again disengaged and the feed roller 15 is stopped. Thereafter, the rod of the cylinder 41 is moved from right to left and returned to the standby position. In this way, regardless of the amount of time elapsed after yarn breakage, the sliver 1 can be used in any yarn breakage unit 2.
The shape of the tip portion of 9 can be made almost constant.

Next, an opener (not shown) provided on the yarn splicing machine 27
Then, as shown in FIG. 5, open the opening/closing body part 5 of the spinning unit 2, and rotate the support part 3 clockwise in the figure to control the rotation of the spinning rotor 7 by the braking member 10. Stop. Then, in this state, the cleaning cylinder 28 is activated to move the cleaning device 29 from the standby position to the operating position, and the inside of the spinning rotor T is cleaned by an appropriate removing means. Note that, at this time, the combing roller 11 stops rotating because the pulley 23 is separated from the drive belt 16.

Next, after the cleaning operation is completed, wait for the cleaning device 29 to return to its original position, and then use the opener to open the opening/closing body portion 5.
are closed, and the spinning rotor 1 and combing roller 11 are restarted, respectively. Then, as shown in FIG. 6, the suction nozzle 31 is operated while the package 35 is reversed by the drive roller 3q of the yarn splicing device 34 to rewind the yarn Y from the package 35, and the yarn end is transferred to the cutting means 32. After cutting the yarn to a predetermined length, the cut end is gripped by the yarn gripping roller 33 and moved to the yarn path position.Then, when the yarn end is introduced into the pull-out passage 12, the inside The yarn end advances toward the spinning rotor 7 due to the negative pressure.

Next, at a predetermined time before this yarn end reaches the fiber convergence section of the spinning rotor 1, the feed roller 15 is restarted, and the sliver 19 is fed to the combing roller 17 and opened as shown in FIG. After that, when the opened fibers are carried on the airflow 22 generated in the fiber passage 21 and supplied into the spinning rotor T, the tips of the fibers reach the fiber convergence section and are spliced to the end of the yarn Y. . After the thread splicing is completed, the thread Y is wound around the thread cage 35 by the drive roller 36 (while the thread cage 35 is rotated in the normal direction to lead out the thread Y from the pull-out passage 12). As a result, the spinning unit 2 is in a normal spinning operation state, and the yarn splicing machine 27 is moved to the next yarn breaking unit.

However, in this oven-end spinning frame, the sliver is supplied for a certain period of time immediately after the yarn splicing machine 21 stops as described above, so when the feed roller 15 is restarted during yarn splicing, the tip of the sliver 19 is The shape can always be kept constant regardless of the length of time that has passed since the thread broke. Therefore, the above-mentioned prefeed time in each thread cutting unit can be made constant without providing a special control mechanism. Therefore, since an appropriate amount of fiber is always supplied into the spinning rotor 7, the yarn splicing success rate can be increased.

Effects As detailed above, this invention supplies the sliver for a certain period of time immediately after the yarn splicing machine stops in front of the yarn cutting unit, and within this period, the tip of the sliver is shaped into a substantially constant shape by the combing roller. By aligning the scrapes, each unit can perform the yarn splicing operation under the same conditions regardless of the length of time that has passed since the yarn breakage. Therefore, with a simple configuration, the yarn splicing success rate can be improved. This is an industrially excellent invention as a yarn splicing method for oven-end spinning machines.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway side view of an open-end spinning frame embodying the present invention, FIGS. 2 to 4 are enlarged cross-sectional views showing the feed roller and combing roller in different operating states, and FIGS. FIG. 6 is a partially cutaway side view of the oven-end spinning frame in different operating states. Spinning unit 2, pull-out passage 12, feed roller 15, combing roller 17, sliver 19, yarn splicing machine 27. Package 35° Patent Applicant Toyota Industries Corporation Agent
Patent Attorney On 1) Hiroshi Nobuo Figure 6 Figure 5 Procedure? m Formal form (method) % form % 2. Name of the invention Yarn splicing method in an open-end spinning machine 3. Person making the amendment Relationship to the case: Patent applicant address Name 321 Toyota Industries Corporation (Name) 5 , date of amendment order

Claims (1)

[Claims] 1. An open-end device equipped with a spinning unit that has a spinning rotor, a feed roller, and a combing roller and can open the spinning rotor as needed, and a yarn splicing machine that can run in front of the unit. In the spinning machine, the operation of the feed roller is stopped based on the detection signal of the yarn breakage detector, and the yarn splicing machine is stopped in front of the yarn breakage unit, and then the feed roller is operated for a certain period of time to stop the operation of the combing roller. The sliver was fed into A, and within this time, the tip of the sliver was combed into a substantially constant shape by the combing roller.Next, the spinning unit was opened to stop the operation of the spinning rotor and the combing roller. After removing the remaining fibers adhering to the inside of the spinning rotor, the spinning unit is closed and the spinning rotor and combing roller are started, and then the splicing machine starts the splicing operation. A yarn splicing method for an open-end spinning machine, characterized in that: