JP2004189490A - Method and apparatus for starting work station of textile machine producing cross-wound bobbin - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To develop a method and apparatus allowing automatic textile start even at a lot start time with a minimum technological labor. <P>SOLUTION: Threads of a supply bobbin are stored by a gripper pipe supplied by air pressure, the threads are carried into a range of a delivery position in a turning passage of an opening of a suction nozzle, the opening of the suction nozzle is positioned in the range of the delivery position, the threads of the supply bobbin are pulled by the suction nozzle receiving negative pressure, the opening of the suction nozzle is moved into the range of a thread operating device of a twill wind package exchanger, the threads are delivered to the thread operating device, and the threads are fixed to a pipe supplied by the twill wind package exchanger via the thread operating device. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

  The present invention accommodates a package frame for rotatably holding a tube of a twill package, and a thread end of a supply bobbin, particularly when a thread that can be gripped by a twill package changer is missing, for example, after a lot change. The invention relates to a method for starting a working position of a spinning machine for producing a twill package, comprising a gripper tube for carrying out and a suction nozzle for accommodating a yarn end to be wound up in the twill package. The present invention furthermore relates to a package frame for rotatably holding a tube of a twill-wound package, a yarn end of a supply bobbin, for carrying out the method according to claim 1, especially if the upper yarn is missing, for example after a lot change. The invention relates to a start-up device for a working position of a spinning machine for producing a twill-wound package, comprising a gripper tube for accommodating a section and a suction nozzle for receiving a yarn end wound up into the twill-wound package.

  The working position when the yarn breaks or the supply bobbin is exchanged via the winding position computer of the winding position in connection with the operation of the spinning machine for producing the yarn winding package, especially the automatic winding winder. It is common to operate a dedicated automatic yarn joining device, as described, for example, in DE-A-400 57 525.

  That is, first, the suction nozzle is applied to the surface of the winding bobbin that slowly rotates in the direction opposite to the winding direction. After grasping the upper thread end, the suction nozzle is pivoted back to its starting position, in which the suction nozzle opening is positioned below the yarn splicing device. In this case, the twisted yarn extending between the twill-wound package and the suction nozzle comprises an electronic slab catcher located above the yarn joining device, a tightening / cutting device positioned in the area, and a corresponding yarn guide blade and It is guided through the guide contour of the thread guide frame and is drawn into the scissors of the cutting device located below the splicing device.

  Almost simultaneously with the suction nozzle, the gripper tube positioned at the lower starting position pivots to the upper working position, up to which time it carries the lower thread drawn from the supply bobbin, for example held by a thread tensioner. . As the gripper tube pivots to its upper working position, the lower thread, which is also guided along the corresponding thread guide profile, slides into the open thread clamping device as well as the open cutting device. The lower thread and the upper thread are then cut to the correct length, prepared in so-called opening tubules and joined together in a thread splicing device. In other words, in the working position of the automatic twill winder, in order to be able to automatically continue operation after a yarn breakage, for example, both the upper yarn recovered from the twill winding package and the lower yarn coming from the supply bobbin are always required. It is said.

  After the twill winding package exchange and empty tube exchange, the yarn from the supply bobbin reaches the area of the empty tube held by the package frame at the working position and can be fixed to this empty tube. But must be guaranteed accordingly.

  For service runners which operate automatically, i.e. winders with a so-called twill package changer, when the twill package change / empty tube change takes place, there is still a tension between the supply bobbin and the completed twill package. It is known that the twisted yarn is firstly accommodated by special operating means of the twill-wound package changer, namely the so-called yarn lifter, and cut as defined by the cutting and tightening devices arranged on this yarn lifter. (DE-A-195 33 833). In this case, the thread end connected to the supply bobbin is held firmly and then mounted on the newly inserted and replaced empty tube in the package frame.

  The device described above has been found to be advantageous in practice. However, the apparatus has a drawback that it is not possible to work according to functions when exchanging lots. This is because, in such a case, the yarn that can be gripped is not provided to the twill-wound package changer. That is, the yarn end of the supply bobbin prepared at the feeding position of the working position and having the new spun yarn material cannot reach the yarn operating device of the twill winding package changer.

  Thus, a method has already been proposed in which the yarn end of the supply bobbin positioned at the unwinding position is firstly accommodated by a gripper tube and then inserted into a splicing device (DE-A-1 079 950). ). Next, the yarn is cut by the lower yarn cutting device of the yarn splicing device. In this case, the remaining yarn starting end falls into the yarn collecting device arranged below the yarn splicing device. A special lower thread suction tube then receives the thread from the thread catcher and delivers the thread to a thread clamping and cutting device fixedly arranged in the region of the package frame.

  In this case, the yarn tightening / cutting device positions the yarn so that the yarn can be fixed to the empty tube held by the package frame.

Devices such as described in DE-A-1 107 950 A1 in principle make it possible to automatically start spinning after a lot change, but these devices are relatively inexpensive. If it takes time and effort, the cost will increase significantly.
German Patent Application No. 4,057,552 German Patent Application Publication No. 195 33 833 German Patent Application No. 1 079 950

  It is an object of the present invention to develop a method and an apparatus which, starting from the above-mentioned prior art, enable an automatic spinning start even at the start of a lot with minimal technical effort.

  In order to solve this problem, in the present invention, the yarn of the supply bobbin is housed by a pneumatically supplied gripper tube, and the yarn is carried to a range of a delivery position located in a swirl circuit of the opening of the suction nozzle. Position the opening of the suction nozzle within the range of the transfer position, take up the yarn of the supply bobbin with the suction nozzle supplied with the negative pressure, and move the opening of the suction nozzle to within the range of the yarn operating device of the twill winding package changer Then, the yarn was transferred to the yarn operating device, and the yarn was fixed to the tube supplied by the twill winding package changer via the yarn operating device.

  Furthermore, according to the invention, the working positions each have a vacuum line, via which the gripper tube or the suction nozzle is connected to a vacuum source, the solenoid valve being connected to the vacuum line. The computer for the winding position is provided with a control circuit which enables the specified control.

  An advantageous embodiment of the device according to the invention is defined in claim 3.

  The method according to the invention does not require costly new modifications or supplements in the area of the working position, in particular for carrying out the method, but rather the method according to the invention for spinning a twilled package. Has the advantage that it can be carried out in almost the "normal" working position. The working position requires only minor changes in the software of the working position computer.

  That is, in the method according to the present invention, firstly, the yarn end of the supply bobbin of a new lot prepared in the suction cap, for example, is accommodated by the gripper tube dedicated to the winding position, as is customary, and the suction cap is It is pivoted by the gripper tube into the area of the spaced transfer position. Then, the suction nozzle, also dedicated to the winding position, is controlled such that the opening of the suction nozzle is positioned immediately below the opening of the gripper tube waiting at the transfer position. Next, the yarn end is transferred from the gripper tube to the suction nozzle by shutting off the negative pressure supply to the gripper tube at the same time as appropriately supplying the negative pressure to the suction nozzle. The yarn is then brought by the upwardly swirling suction nozzle into the region where the yarn can be gripped with the corresponding yarn handling device of the twill package changer movably arranged above the winding position.

  A twill-wound package changer grips a yarn with, for example, a so-called yarn lifter and transports the yarn into the area of the package frame. In this area the thread is clamped, for example, between the end face of a new hollow tube and the bobbin mounting plate of the package frame. In this case, the protruding yarn end is cut off and removed by the suction nozzle.

  As described in claim 2, the device for carrying out the method according to the invention conventionally comprises a gripper tube dedicated to the winding position, a suction nozzle dedicated to the winding position and a computer for the winding position. Have.

  In this case, the suction nozzle or gripper tube is connected to a negative pressure source via a negative pressure line to which a solenoid valve is connected. The winding position computer with the control circuit is connected to the solenoid valve via a corresponding control line. Such a configuration enables a defined control of the solenoid valve in a simple manner. This means that both the suction nozzle and the gripper tube can be supplied with a negative pressure whenever required or can be operated without a negative pressure supply, so that a reliable delivery of the pneumatically fixed yarn end is achieved. Is guaranteed.

  Furthermore, in an advantageous embodiment, the suction nozzle and the gripper tube have separate drive units which can be controlled in a defined manner, which drive units have corresponding control lines as defined in claim 3. It is connected to a winding position computer via a motor and is formed as a step motor. Such a stepper motor is inexpensive and reliable. In addition, such a stepping motor allows accurate positioning of the suction nozzle and the gripper tube without great circuit engineering effort.

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a side view of a working position 2 of a spinning machine 1 for producing a twill package. Such a spinning machine (in this case, an automatic twill winder) has a number of identical working positions (hereinafter also referred to as winding positions 2) between its end frames (not shown). In these winding positions 2, a supply bobbin, a so-called spinning cup 9, produced in a known manner (and thus not described in detail) on a ring spinning machine (not shown), is unwound into a large-volume twill package 11. It is. Next, the completed twill package 11 is loaded on the twill package transport device 21 by a movable service unit such as a twill package changer 23, and a package loading station (not shown) arranged on the machine end side. ) Etc.

  Such an automatic twill winder 1 generally has a logistic device in the form of a bobbin / empty tube transport system 3. In this bobbin / empty tube transport system 3 (FIG. 1 shows only one of the machine-length cup supply section 4, the reversible drivable storage section 5, one of the transverse transport sections 6 and the empty tube return section 7). Then, the new spinning cup 9 and the drawn out empty tube circulate on the transfer tray 8. In this case, the spinning cup 9 is fed out at a feeding position 10 located within the range of the horizontal transport section 6 and wound up into a large volume twill package 11.

  The individual working positions 2 each have various devices known per se (and thus only shown and described to the extent indicated) to carry out the rewinding process in an orderly manner. Such a working position 2 has, for example, a suction cap 44 in the range of the feeding position 10. This suction cap 44, which can be connected to the gripper tube 20, which can supply a negative pressure, is advantageously slightly retracted with respect to the normal yarn running section and is arranged above the spinning cup 9 positioned at the feed position 10. . Furthermore, the working position 2 as described above has a suction nozzle 12 for operating the upper thread, a thread tensioner 14, a slab catcher 15 having an associated thread cutting device, and a paraffin processing device 16. The twilled package 11 is held on a package frame 18 which is rotatably supported with a limited extent about a pivot axis 19 within a predetermined range during the winding process. In this case, the twill winding package 11 is driven in a frictional connection by a yarn guide drum 17 which also serves, for example, to wind the yarn 30 into the twill winding package 11 in a twill winding type.

  The control corresponding to the function of the yarn operating device described above is performed via the winding position computer 39. The winding position computer 39 has a control circuit for controlling the solenoid valves 38;

  As shown in particular in FIGS. 2A to 2E, both the suction nozzle 12 and the gripper tube 20 are connected to a negative pressure source 55 via negative pressure conduits 53; The solenoid valves 38 and 50 are connected to the negative pressure conduits 53 and 54 one by one, and the solenoid valves 38 and 50 are wound via the control lines 51 and 52 at the working position 2. It is in a connected state with the position computer 39. That is, both the suction nozzle 12 and the gripper tube 20 are controlled by the winding position computer 39, and can be controlled so that negative pressure is selectively supplied or negative pressure does not stay in the opening area. . Furthermore, advantageously, the gripper tube 20 and the suction nozzle 12 each have one dedicated drive 37; In this case, these drives 37; 49 are also connected to the winding position computer 39 via the corresponding control lines 56, 57.

  As can be seen from FIG. 1, a twill winding package changer 23 is arranged above the winding position 2 so as to be movable along the running rails 26 and 27. Supported by running devices 24, 25 on running rails 26, 27 and energized, for example, via a drag chain (not shown), the twill package changer provides a completed twill package 11 if necessary. Is not only used for conveying the vacant tube to the twill winding package conveying device 21, but a new empty tube 28 is automatically put into the package frame 18 at the winding position 2 at each time and replaced. In this case, the twill winding package exchanger 23 takes out the empty tube 28 from the empty tube storage 22 dedicated to the winding position. Such a tandem package changer 23, which has been found to be advantageous, has a number of operations having the functions and modes of operation of the prior art to accomplish the above-mentioned and other known problems. Equipment.

  1, only the frame opener 29, the empty tube supply device 31, the frame lifter 32, the package guide device 33, and the thread lifter 41 are shown in FIG. In this case, for example, the thread lifter 41 rotatably supported around the pivot axis 42 has a thread gripping / cutting device 43 on the end side.

Functions of the method according to the invention:
As shown in FIG. 1, the yarn 30 extends along a trajectory from the spinning cup 9 via the yarn guide drum 17 to the twill winding package 11 during a normal winding operation. In this case, the yarn 30 runs, inter alia, through a slab catcher 15 which monitors the running yarn 30 for scratches. That is, when the slab catcher 15 finds a yarn wound, the specified catcher cutting is activated, and the running yarn is cut.

  In this case, the lower thread is generally held by the thread tensioner 14, while the upper thread, which also has a thread flaw, is wound up on the twill winding package 11. Next, the winding device is braked, and the lower yarn held by the yarn tensioner 14 is inserted into the yarn splicing device 13 by the gripper tube 20. At the same time or slightly later, the suction nozzle 12 receives the upper thread. To this end, the twill winding package 11 is slowly rotated in the feeding direction, and the yarn end of the upper yarn located on the upper surface is sucked by the suction nozzle. After removal of the wound yarn, the upper yarn is also inserted into the yarn splicing device 13 by the suction nozzle 12, where it is spliced with the lower yarn in a known manner. Then the "normal" winding process is started again.

  If the twill package 11 has reached the desired diameter and is to be replaced with a new tube, in principle a similar process takes place.

  In this case also, the yarn splicing process takes place after the first defined catcher cut, but the winding position is not restarted again. Instead, the twill-wound package exchanger 23 positioned at the winding position 2 removes the twisted yarn tensioned between the spinning cup 9 and the twill-wound package 11 using a suitable operating member such as a yarn lifter 41. The yarn is gripped and a so-called spare yarn is mounted on a twill-wrapped package bobbin. After the yarn 30 is cut, the twill-wrapped package 11 is transferred to a twill-wrapped package transfer device 21 having a machine length. In this case, the yarn lifter 41 firmly holds the lower thread connected to the spinning cup 9, and then removes the lower thread from the intermediate storage 22 dedicated to the winding position by the twill winding package changer 23 to remove the lower frame from the package frame. 18 and fixed to the newly replaced empty tube 28.

  In the case of lot exchange, this method has been difficult so far that it cannot be compared. This is because, in such a case, there is no upper thread that can be attached to a new empty tube 28 after the splicing to the lower thread. Thus, in the present invention, as shown in FIG. 2A, the lower thread of a new spinning cop 9 prepared in the suction cap 44 as described, for example, in EP 0805118 is first introduced into the gripper tube 20. Housed by. That is, the gripper tube 20 to which the negative pressure is supplied is connected to the opening of the suction cap 44, and the lower thread is sucked by the opening 47 of the gripper tube 20. Then, as shown in FIG. And pivot upward to the delivery position. In this case, the yarn 30 is also unwound from the spinning cup 9 and is carried upward. Next, the suction nozzle 12 is also swung slightly upward. In other words, the opening 35 of the suction nozzle 12 is formed along the spiral circuit 36, and the opening 35 is indicated by reference numeral 40 immediately after the intersection of the spiral circuit 48 of the gripper tube opening and the spiral circuit 36 of the suction nozzle opening. Swivel upward until it is down. As soon as the opening 35 of the suction nozzle 12 is positioned just below the opening 47 of the gripper tube 20, a negative pressure is supplied to the suction nozzle 12 by appropriately controlling the solenoid valve 38. At the same time, the solenoid valve 50 is switched so that the negative pressure in the gripper tube 20 decreases. Now, each of the solenoid valves 38 and 50 occupies the switching position shown in FIG. 2C. The gripper tube 20 can then be pivoted back to its starting position. Now, the suction nozzle 12 supplied with the negative pressure further pivots upward, and at the same time, further draws out the yarn 30 from the spinning cup 9. As shown in FIG. 2D, at the upper end position of the suction nozzle 12, the yarn 30 is located on the upper rear side of the opening head of the suction nozzle 12 and forms a twisted yarn that can be easily accessed. An appropriate operating member, such as a thread lifter 41, of the twill winding package exchanger 23 positioned within the winding position 2 is drawn into the twisted yarn. That is, the yarn 30 is fixed in position by the yarn tightening / cutting device 43 arranged in the yarn lifter 41, during which the yarn 30 is taken out from the intermediate storage 22 dedicated to the winding position by the twill winding package changer 23 and put into the package frame 18. It is mounted on the replaced empty tube 28 (FIG. 2E). Next, the yarn tightening / cutting device 43 cuts the protruding yarn end, and this yarn end is processed through the suction nozzle 12. Finally, the empty tube 28 is lowered onto the yarn guide drum 17, and the winding process of a new spun yarn lot at the winding position 2 is started again.

1 shows a side view of one working position of a spinning machine for producing a twill package having the device according to the invention, as well as a movable twill package changer arranged above the spinning machine.

FIG. 3 shows the individual steps of the method according to the invention.

FIG. 3 shows the individual steps of the method according to the invention.

FIG. 3 shows the individual steps of the method according to the invention.

FIG. 3 shows the individual steps of the method according to the invention.

FIG. 3 shows the individual steps of the method according to the invention.

Explanation of reference numerals

  1 spinning machine, 2 working position (winding position), 3 bobbin / empty tube transfer system, 4 cup supply section, 5 storage section, 6 horizontal transfer section, 7 empty pipe return section, 8 transfer plate, 9 spinning cup , 10 feeding position, 11 twill winding package, 12 suction nozzle, 13 yarn splicing device, 14 yarn tensioner, 15 slab catcher, 16 paraffin processing device, 17 yarn guide drum, 18 package frame, 19 turning axis, 20 gripper tube, 21 Aya winding package conveyor, 22 empty tube accumulator, 23 Aya winding package changer, 24, 25 traveling device, 26, 27 traveling rail, 28 empty tube, 29 frame opener, 30 thread, 31 empty tube supply device, 32 frame Lifter, 33 package gas Device, 35 opening, 36, 48 circuit, 37, 49 drive, 38, 50 solenoid valve, 39 winding position computer, 41 thread lifter, 43 thread tightening / cutting device, 44 suction cap, 47 opening, 51 , 52 control line, 53, 54 negative pressure conduit, 55 negative pressure source, 56, 57 control line

Claims (3)

A package frame for rotatably holding a tube of the twill package, a gripper tube for containing a yarn end of the supply bobbin, and a suction nozzle for containing a yarn end to be wound into the twill package; In the method of starting the working position of the spinning machine for producing a twill winding package,
A) The yarn of the supply bobbin is accommodated by a pneumatically supplied gripper tube, and the yarn is conveyed to a range of a delivery position located in the swirl circuit of the opening of the suction nozzle.
B) The opening of the suction nozzle is positioned within the range of the delivery position, and the yarn of the supply bobbin is taken up by the suction nozzle supplied with the negative pressure.
C) Move the opening of the suction nozzle into the range of the yarn operating device of the twill winding package changer, and deliver the yarn to the yarn operating device.
D) A method for starting a working position of a spinning machine for producing a twill-wound package, wherein the yarn is fixed to a tube supplied by a twill-wound package changer via the yarn handling device. A package frame for rotatably holding a tube of a twill package, a gripper tube for receiving a yarn end of a supply bobbin, and a yarn end to be wound into a twill package for performing the method of claim 1. In the operation starting device of the working position of the spinning machine for producing a twill winding package, provided with a suction nozzle for accommodating the section,
The working position (2) has in each case a vacuum line (53, 54), via which the gripper tube (20) or the suction nozzle (12) is connected to a vacuum source (55). A winding position computer (39) provided with a control circuit enabling a defined control of the solenoid valves (38, 50) connected to the negative pressure conduits (53, 54). An operation start device for a working position of a spinning machine for producing a twill winding package.   A winding position computer (39) is connected via a control line (57) to a drive (49) of a gripper tube (20), which is preferably formed as a stepper motor, and a control line (56). 3. The device according to claim 2, wherein the device is connected via a drive to a drive of a suction nozzle, which is also preferably formed as a stepper motor.

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