JPH02234930A - Method and apparatus for ending yarn - Google Patents

Abstract

PURPOSE:To shorten the length of a storage mechanism by taking out a prescribed amount of yarn from a package, carrying out yarn ending operation with spun yarn, rotating and accelerating the package before completing yarn ending operation before completing the yarn ending operation. CONSTITUTION:Yarn taken out of a package is stored in a storing means 75 provided between a splicer 71 and the package and wound into a package at or just after the completion of the yarn ending operation. The amount of the stored yarn taken out of the package is fixed regardless of the winding diameter of the package and the acceleration ratio for rotating the package is nearly fixed regardless of the winding diameter of the package.

Description

[Detailed Description of the Invention] <<Industrial Application Field>> The present invention is directed to a textile machine such as an open-end spinning machine or a binding spinning machine, in which a yarn is spun at a constant speed,
The present invention relates to a method and apparatus for splicing yarn pulled out from a package in which the yarn is wound. <Prior art> Generally, open-end spinning MIn or binding spinning f
Textile machines such as ll81 have a draft mechanism, yarn forming mechanism,
It consists of a take-up mechanism, a winding mechanism, etc., and is designed to spin and wind up spun yarn such as bound spun yarn by supplying a staple fiber bundle. If a yarn breakage occurs during the production of the spun yarn, the winding mechanism is temporarily stopped, the yarn spun from the yarn forming mechanism is sucked by the upper yarn suction means of the yarn splicing device, and the yarn spun from the yarn forming mechanism is suctioned, and the lower yarn suction is performed. The yarn is suctioned and pulled out from the package by a means, and each yarn is conveyed to a splicing means such as a knotter for splicing. The yarn spun from the side of the yarn forming IN during the splicing operation is taken up
The package is suctioned and stored in a storage mechanism installed between the yarn splicing mechanism and the yarn splicing means, and when the yarn splicing operation is completed, the stopped package is started and the speed is rapidly increased to a predetermined acceleration.
The yarn stored in the storage 81 structure is wound up, and then the rotational speed of the package is changed to a predetermined winding speed, and the yarn spun from the yarn forming R canopy is wound up. (Problem) In the above-mentioned yarn piecing method, the package is rotated and accelerated after the yarn piecing operation is completed, so the yarn accumulated during the yarn piecing operation and the package are moved from a stopped state to a predetermined position. It is necessary to suction and store in the storage mechanism the total length of the yarn generated during the time when the winding speed is increased (0.5 to 1 second), and a storage mechanism with a large capacity is required. If the storage mechanism is installed on the machine side,
For example, as described in Japanese Patent Application Laid-Open No. 53-134943, the suction path must be bent several times, which is very difficult to manufacture.

In addition, when splicing with a knotter, the splicing operation time is as short as 0.1 to 0.3 seconds, so even if you want to install a long storage mechanism, you can store enough yarn. When performing a yarn splicing operation, the yarn splicing operation time is as long as 0.4 to 0.7 seconds, resulting in a large amount of stored yarn. Therefore, in order to store the threads generated during the rise of the package and the threads generated during the splicing operation, it is necessary to install a storage mechanism with a very large capacity, and the production of cows with the storage R structure is extremely difficult. There were problems in that it was difficult to implement, and it was also impossible to implement it because there was no place to install a storage tank with a large capacity on the machine base. Furthermore, since the yarn between the yarn splicing means and the package cannot be wound onto the package with a predetermined winding tension at the same time as the yarn splicing operation is completed, the yarn at splicing section B becomes a snarl. There was a problem that the product would get wrapped up in the package. (item 11) The first purpose of the present invention is to shorten the length of the storage mechanism and facilitate its manufacture.The second purpose is to perform thread splicing operation by knocking. The aim is to improve existing textile machinery so that it can perform splicing operations using a splicer. The third purpose is to prevent the snarl from getting caught up in the package. (Means for Solving the Problems) In order to achieve the above-mentioned object, the yarn splicing method of the present invention comprises a yarn spun at a constant speed and a yarn spliced from a package wound with the yarn spun at a constant speed. When the yarn is spliced by the splicing means, a predetermined amount of the yarn is pulled out from the package, the splicing operation is performed, and the package is rotated and accelerated before the splicing operation is completed.

Further, in the above method, the yarn pulled out from the package is stored in a storage means installed between the yarn splicing means and the package, and the yarn pulled out from the package is stored at the end of the splicing operation, or Immediately after finishing, the amount of yarn that is wound onto the package and pulled out from the package is constant regardless of the winding diameter of the package, and the acceleration rate for rotating the package is made approximately constant regardless of the winding diameter of the package. By doing so, it can be carried out reliably. The method described above uses a yarn splicing device which runs along the machine base and is equipped with a splicing means, an upper thread suction means, a bobbin thread suction means, a roller drive means, and a scooping means. This can be implemented by arranging a storage means for yarn splicing on the machine frame so as to be located between the yarn splicing device and the winding am of the textile machine. The configuration of one embodiment of a textile machine will be explained based on the drawings. 1 is a draft mechanism installed on a machine base 10, and is composed of a back roller 11, a middle roller 2, and a front roller 13. The back roller 11 is equipped with means for separating the drive shaft from the roller and stopping the rotation.

Reference numeral 2 denotes a yarn forming tip installed on the machine stand 10 so as to be adjacent to the front roller 13 on the side of the draft machine 1, which sucks the staple fiber bundle supplied from the roller 13,
It is designed to apply swirling force to form a bound spun yarn. The thread forming mechanism 2 is disclosed in, for example, Japanese Patent Application Laid-Open No. 63-24333.
Those described in Publication No. 5 can be used. 3 is a take-up mechanism installed below the yarn forming mechanism 2 at a predetermined interval, and is composed of a drive roller 31 and a short cantilevered nig roller 32.
It is designed to take up the yarn fed out at a predetermined speed. Reference numeral 4 denotes a storage mechanism installed below and adjacent to the side 3 of the take-up machine, one end of which is opened at the yarn traveling position, the other end of which is connected to a negative pressure duct 42, and has a substantially flat passage. It is composed of a suction tube 41. 5 has a tension applying mechanism installed below and adjacent to the storage structure 4;
1, a cutter 52, a slab catcher, etc. Reference numeral 6 denotes a winding mechanism installed below the tensioning machine side 5, which has a groove for traversing, and has a drive roller 61 attached to the line shaft via a clutch and a bobbin rotatably attached. , a cradle 6 having pressure means for bringing the bobbin into contact with the drive roller 61 with a predetermined surface pressure.
2, and is adapted to wind up the yarn sent out from the take-up mechanism 3. The draft aperture 1 to the winding mechanism 6 described above form one unit, and a plurality of units are installed at predetermined intervals in the longitudinal direction of the machine stand 10 to form one textile machine. 7 is a yarn splicing device that runs in the longitudinal direction of the machine base 10 along rails 10a and 10b formed on the machine base 10, and when thread breakage occurs, the upper thread is sent out from the yarn forming machine ellipse 2. Then, the bobbin thread pulled out from the package 80 being wound is spliced. The details of the yarn splicing device 7 are as shown in FIGS. 2 and 3, and in the figures, 71 is the above-mentioned tension applying mechanism 5 and winding 8l.
This is a splicer attached to the machine frame 70 so as to be located between the yarn forming mechanisms 6 and splices the upper thread sent out from the yarn forming mechanism 2 and the lower thread pulled out from the package being wound. The splicer 71 includes a guide plate that guides the yarn to a predetermined splicing section, gripping claws that grip the upper thread and the lower thread, respectively, and
It consists of thread splicing parts, etc. 72 is an upper thread suction means rotatably attached to the machine frame 70 by a bearing;
One end is opened to form a suction port, and the other end is connected to a negative pressure source such as a blower (not shown). Then, the suction port moves to the suction position (a) below the take-up mechanism 3 and the standby position (opening) below the splicer 71, and
The yarn sent out from the splicer 71 is suctioned as a needle thread and conveyed to the splicing section of the splicer 71. Reference numeral 73 denotes a bobbin thread suction means rotatably attached to the machine frame 70 by a bearing, one end of which is formed with a suction port having approximately the same width as the package width, and /l! ! The end is connected to a negative pressure source such as a blower (not shown). The suction port is connected to the suction position (c) of the cradle 62 close to the package 80 and the splicer.
71 to the waiting position (2) below, and the package 80
The thread from the splicer 71 is suctioned as a bobbin thread and held at a position below the splicer 71. 74 is a roller driving means, and the machine frame 7
an arm 74a rotatably attached to the end of the arm 74a by a bearing; a roller 74b rotatably attached to the end of the arm 74a; a cylinder (not shown) for rotating the arm 74a; It is composed of an electric motor (not shown) such as an induction motor or a pulse motor to
Rotate the drive rollers 61 of l1 and l6 in forward and reverse directions. 7
5 is a storage means attached to the machine frame 70 so as to be located between the winding mechanism 6 and the splicer 71;
A part of the working side of the suction tube 75a is cut out to form a suction port in a direction perpendicular to the vertical direction in which the yarn runs, and the end of the suction tube 75a is connected to a negative pressure source such as a blower (not shown). is connected to. Reference numeral 76 denotes a yarn gripping means attached to the machine frame 70 so as to be adjacent to the upper part of the suction port of the storage means 75, and as shown in FIG. The package is composed of a member 76b, a movable member 76c for gripping the yarn, which is movably fitted into the fixed member 76b and moved by an electromagnetic actuator (not shown), and a detector 76d for detecting the yarn. When it detects the thread pulled out from 80, it grasps and fixes it. Therefore, when the package 80 is reversely rotated by the roller drive means 74, the yarn is suctioned and stored in the suction tube 75a of the storage means 73. A scooping tool 77 is rotatably attached to the machine frame 70, and moves to a lifting position (E) above the splicer 71 and a standby position (E) below the suction means 75. The thread between the thread suction means 72 and the bobbin thread suction means 72 is scooped up and conveyed to the splicing section of the splicer 71. The yarn is pulled out by rotating the package in the opposite direction to the winding direction by the roller driving means 74 described above, and the yarn length (L) stored in the storage means 75 is determined by changing the yarn length (L) from the stopped state of the package to a predetermined winding speed. It is necessary to add the error length (avoidance) to the length to be wound (ffi+) in the time it takes to reach . The error (12.) depends on the accuracy of the electric motor of the roller drive mechanism 7゜4, the inverter that controls the rotation speed of the motor, or the winding diameter of the package 80.
Set this by taking into consideration the variation in thread pull-out length due to traverse width position, etc. Therefore, if a valsmotor or the like is used to drive the roller, the error (l2) can be reduced. The error (J!.) is set in the range of 10 to 50 as. Further, the acceleration when starting up the package from a stopped state to a predetermined winding speed is determined by the roller 7 of the roller drive mechanism 74.
4b and the drive roller 61 of the winding mechanism 6, and between the drive roller 61 and the package 80, it is preferable to set the maximum speed at which no slip occurs. By setting the driving force and rotation start-up time of the roller drive means 74 so that the length of the yarn stored in the storage means 75 described above is approximately constant, and the acceleration of the package is approximately constant regardless of the size of the baggage. , the thread splicing operation can be performed at the same timing regardless of the size of the package. A yarn detector is installed at a predetermined position inside the machine and measured. In addition, it is possible to predict in advance the difference in acceleration due to the size of the package and change the storage amount so that winding of the stored yarn is completed in the same amount of time regardless of the package size, or to keep the storage amount constant and adjust the splicer. It is also possible to change the startup timing depending on the difference in acceleration. The above-mentioned draft mechanism 1, winding mechanism 6, and yarn splicing device 7
etc. are controlled by a control device (not shown) consisting of an operation setting input circuit, a memory circuit, a comparison circuit, an arithmetic circuit, an operation command circuit, etc., or a microcomputer, etc. Yarn formation and winding in the spinning machine described above If yarn breakage occurs during the taking operation, the rotation of the back roller 11 of the draft mechanism 1 is stopped based on a signal from a control device (not shown), and the feeding of the yarn from the yarn forming mechanism 2 is interrupted. At the same time, the clutch (not shown) of the drive roller 61 of the winding mechanism 6 is activated to disconnect it from the line shaft, and the rotation of the package 80 is stopped.
When the thread is moved to the corresponding unit position, the thread splicing operation is performed in the order shown in Fig. 5. First, the upper thread suction means 72
rotates and moves the suction port to the suction position (A) below the take-up mechanism 3, the draft mechanism 1 is activated and supplies the stable fiber bundle to the yarn forming mechanism 2, where it is spun as a bundled spun yarn. At the same time, it is sent out from the take-up mechanism 3 at a preset speed. The yarn coming out from between the drive roller 31 and the nip roller 32 is sucked into the suction port as an upper yarn. Simultaneously with this operation, the bobbin thread suction means 73 rotates to move the suction port to the suction position (c) above the package 80, and the roller drive means 74 operates to move the suction port to the suction position (c) above the package 80.
a to bring the roller 74b into contact with the drive roller 61 of winder #I6, and then an electric motor (not shown) is activated to rotate the roller 74b and wind the package 80 together with the drive roller 6. Rotates in the opposite direction to the take direction. Then, the thread adheres to the outer peripheral surface of the package 80, and during operation, the upper thread suction stage 72 rotates, returns the suction port to the standby position (mouth), and conveys the thread to the splicing section of the splicer 71. Meanwhile, the package 80 is reversely rotated to a preset length (
When the yarn L) is stored in the suction tube 75a, the roller drive means 74 is activated to stop the rotation of the roller 74b (
Figure 5-4). When the splicer 71 is suctioned by the above-described operation, the bobbin thread suction means 73 rotates to return the suction port to the standby position 1 (2) (Fig. 5-2). When the yarn is detected by the detector 76d of the yarn gripping means 76 due to this operation, an electromagnetic actuator (not shown) is activated to retract the movable member 76c, and the yarn is gripped by the movable member 76C and the fixed member 76b. Fix it. As the package 80 continues to be rotated, the yarn is unwound from the package 80. Therefore, the yarn is sucked into the suction port of the suction tube 75a of the storage means 75 and stored in a U-shape (Fig. 5-3). It is stored in the U-shape. Next, the scooping means 77 rotates to scoop up the yarn located between the gripping means 76 and the bobbin thread suction means 72, and lifts the yarn to the upper position (E) of the splicer 71, so that the splicer 71 splices the yarn. Transport to the department. At the same time or before the scooping means 77 starts rotating, the roller driving means 74 operates, and the roller 74b moves the package 8 together with the drive roller 61 of the winding mechanism 6.
Rotate 0 in the winding direction. At this time, the package 80 is
Rotates from a stopped state at a preset winding speed with a preset acceleration (the highest acceleration that does not cause slip between the roller 76b and the drive roller 61 or between the drive roller 61 and the package 80). Then, the yarn stored in the storage means 75 is pulled out and wound. Next, the splicer 71 operates to remove the take-up mechanism 3.
The speed has reached the point where the upper thread, which is a thread that has not been sent out from the machine, and the lower thread, which is a thread that has been pulled out from the pa-y gauge 80, can be spliced (Fig. 5-7). When the above-mentioned yarn splicing operation is completed, the roller driving means 74 is activated to rotate the arm 74a to separate the roller 74b from the package 80, and the clutch of the winding mechanism 6 is activated to connect the drive roller 61 to the line shaft. They are connected and the yarn is wound. Therefore,
Simultaneously with the end of the yarn splicing operation with a predetermined winding tension, the yarn gripping means 76 is activated and the movable member 76c protrudes to release grip on the yarn. At this time, the yarn stored in the storage means 75 is wound around the package 80 and almost no yarn remains. In addition, since tension is applied to the yarn between the tin slicer 71 and the package 80 by the storage means 75, snarls are likely to occur at the yarn splicing section (Figures 5-6). When all of the yarn has been wound onto the package 80, winding of the yarn in the storage tube 4 is started.At this time, the rotational speed of the package 80 is adjusted to a preset winding degree until the yarn is sent out from the take-up mechanism 3. Since the speed is 2 to 3% faster than the speed, the yarn stored in the storage mechanism 4 during the splicing operation is transferred to the package 8.
0 (Figure 5-8). <<Effects of the Invention>> The splicing method of the present invention comprises a yarn spun at a constant speed;
When splicing the yarn pulled out from the package in which the yarn has been wound up using the splicing means, a predetermined amount of yarn is pulled out from the package and splicing operation is performed, and before the splicing operation is completed, the back Because the yarn is rotated and accelerated, the yarn is wound into the package at the same time as the yarn splicing operation is completed, making it possible to shorten the length of the storage mechanism installed on the machine stand and simplify manufacturing. Can be done. In addition, since the package has almost reached the winding speed when the splicing operation is completed, the splicer can perform the splicing operation during the time it takes for the package to start up.
Existing textile machines equipped with knotters can be modified to enable splicing operations using splicers. Furthermore, tension is applied to the yarn between the yarn splicing means and the Pub gauge by the storage means, and the yarn is wound into the package with a predetermined winding tension at the same time as the yarn splicing operation is completed. It is possible to prevent the occurrence of snarls in the yarn at the yarn joint. Further, in the above method, the yarn pulled out from the package may be stored in a storage means installed between the splicing means and the package, the yarn pulled out from the package may be stored at the end of the splicing operation, or , the amount of yarn pulled out from the backage is kept constant regardless of the winding diameter of the package, and the acceleration rate for rotating the package is almost constant regardless of the winding diameter of the package. By doing so, you can ensure the implementation. The method described above uses a yarn splicing device in which a machine frame that runs along a machine frame is equipped with a yarn splicing means, an upper thread suction means, a lower thread suction means, a roller drive means, and a scooping means. This can be achieved by arranging a storage means for splicing in the machine frame so as to be located between the splicing means and the winding mechanism of the textile machine.

[Brief explanation of the drawing]

FIG. 1 is a schematic cross-sectional view of a spinning machine having a splicing device of the present invention. Figure 2 is a schematic enlarged view of the yarn splicing device in the first construction. Figure 3 is a Z-Z arrow view in the second stage. FIG. 4 is a schematic perspective view of the yarn gripping means. Figure 5 is a schematic diagram showing the sequence of thread splicing operations. 1: Draft mechanism, 2: Yarn formation mechanism, 3: Taking-up mechanism, 4: Storage mechanism,
5: Tension applying mechanism, 6: Winding 1! ! Oval, 7: Thread splicing device, 10: llffi stand, 70: lll frame,
72: Upper thread suction means, 73: Lower thread suction means,
74: Roller driving means, 75: Storage means, 76
: Yarn gripping means, Fig. 1

Claims (1)

[Scope of Claims] 1) When a yarn spun at a constant speed and a yarn pulled out from a package wound with the yarn are spliced by a splicing means, a predetermined amount of yarn is spun from the package. A yarn piecing method characterized in that the package is pulled out to perform a yarn piecing operation, and the package is rotated and accelerated before the yarn piecing operation is completed. 2) The yarn splicing method according to claim 1, characterized in that the yarn pulled out from the package is stored in a storage means installed between the yarn splicing means and the package. 3) The yarn splicing method according to claim 1, characterized in that the yarn pulled out from the package is wound around the package at the end of the yarn splicing operation or immediately after the yarn splicing operation is completed. 4) The yarn splicing method according to claim 2, characterized in that the stored amount of the yarn pulled out from the package is kept substantially constant regardless of the winding diameter of the package. 5) The yarn splicing method according to claim 2, wherein the rotational acceleration rate of the package when winding up the yarn pulled out from the package is made substantially constant regardless of the winding diameter of the package. 6) In a yarn splicing device in which a thread splicing means, an upper thread suction means, a bobbin thread suction means, a roller drive means, and a scooping means are mounted on a machine frame that runs along a machine frame, the splicing means and A yarn splicing device characterized in that a storage means for yarn splicing is arranged in a machine frame so as to be located between a winding mechanism of a textile machine.