JP5840421B2 - Rewinder and method for operating the rewinder - Google Patents

Description

  The present invention is a working part of a rewinding machine, and is provided with a yarn gripping nozzle that is arranged adjacent to a yarn running path and capable of supplying a negative pressure, and an opening of the yarn gripping nozzle is directed to the yarn running path. Concerning the format. The invention further relates to a method of operating a work site.

  The rewinder works to rewind the yarn from a pay-off bobbin, for example a spinning cup, into a winding package, which is often a twill package. In order to carry out the rewinding process, the working part of such a rewinding machine has a wide variety of yarn monitoring devices, yarn processing devices and yarn handling devices in the region of the yarn runway. In general, a yarn gripping nozzle is arranged on the yarn running path at each winding position. This thread gripping nozzle is a pipe to which suction air is supplied, and works to suck and hold one thread end when a thread breakage occurs. Depending on the thread gripping nozzle, the floating thread is also sucked. Such floating yarn occurs, for example, when the yarn breaks in the upper region of the yarn runway in the vicinity of the winding package, and the yarn is then cut by a clearer placed under the yarn breakage point. Further, dust particles and contaminant particles generated when the yarn is fed from the feeding bobbin are also sucked in by such a yarn gripping nozzle. The inhalation of dust and contaminant particles has a special meaning for the quality of the wound package. Suction at the end of the yarn prevents the yarn from getting tangled in the component at the rewinding point and ensures a defined switch-off of the rewinding point, and thus automated splicing at the work point of the rewinding machine and Enable restart. In order to perform the function of the thread gripping nozzle, a negative pressure must always be supplied to the thread gripping nozzle during a normal rewinding process. During the splicing process, the thread grab nozzle usually does not perform the suction operation. Otherwise, the yarn having a low tension that has been pulled back to the yarn splicer region by the yarn handling device will be inadvertently sucked into the yarn gripping nozzle. Furthermore, it is possible for the thread gripping nozzle to continue the suction action. In such a case, when the yarn is sucked during or after the yarn splicing process, the sucked yarn loop must be pulled out from the yarn gripping nozzle again with the start of the rewinding point and defibrated.

  A working part of the type mentioned at the beginning and equipped with a thread grab nozzle is disclosed, for example, in DE 102005001093.

  As described above, it is significant that a sufficient negative pressure can always be used for the operation of the thread gripping nozzle. However, in order to maintain such a negative pressure, it is necessary to consume a large amount of energy.

DE102005001093

  It is therefore an object of the present invention to guarantee a reliable function of the thread grab nozzle while at the same time reducing energy consumption.

  In order to solve this problem, at the work location according to the present invention, as described in the characterizing portion of claim 1, that is, an injector for generating a spray flow is arranged adjacent to the yarn path, and the opening of the injector is It is directed toward the yarn located on the yarn running path and toward the opening of the yarn gripping nozzle, and a means for injecting a blowing flow is provided if necessary.

  Further, in the method according to the present invention for solving the above-mentioned problem, as described in claim 6, a negative pressure is supplied to the yarn gripping nozzle disposed adjacent to the yarn running path so as to extend before the opening of the yarn gripping nozzle. In the method of operating the working part of the rewinding machine, which applies a suction action to the existing yarn, the injector arranged adjacent to the yarn runway, if necessary, toward the yarn located on the yarn runway, In addition, a spray flow directed toward the opening of the thread gripping nozzle is jetted.

  Advantageous embodiments of the invention are described in the dependent claims.

  According to the first aspect of the present invention, the thread gripping nozzle need only supply a slight negative pressure. That is, the injector assists the function of the thread gripping nozzle. Dirt and residual yarn that are not directly sucked by the thread gripping nozzle by the spraying flow are carried toward the thread gripping nozzle and sucked by the thread gripping nozzle. This guarantees a perfect function. The spray flow is injected as needed, that is, only when necessary, so that only a small negative pressure needs to be provided at the thread grab nozzle, so that less energy is required as a whole.

  In one embodiment of the working point according to the invention, the injector is connected to a pressure air line, and the injector is assigned as said means a valve that enables the injection of a spray flow. The pressure stem line is present at the work site of the rewinder anyway, for example for a blower for clearing. Therefore, the cost increase for the working point according to the invention for the injector or valve is small. Further, it is not necessary to increase the output of the existing pressure air line. This is because the pressurized air for the injector and for other uses usually does not need to be used at the same time.

  It is advantageous if a control unit for controlling the valve as necessary is provided as the means. For this configuration, the existing work location control device can be adapted accordingly.

  In another embodiment of the working site according to the invention, the opening of the thread gripping nozzle and the opening of the injector are arranged facing each other so that the yarn path is located between both openings. The thread grab nozzle can maintain a normal position behind the thread path. The injector is arranged in front of the yarn running path in accordance with the position of the yarn gripping nozzle, whereby the injector can guarantee its function.

  In yet another embodiment of the work site according to the invention, the injector is formed as a flexible tube, the opening of the flexible tube being positioned in front of the yarn runway using the tube holder, A curved guide portion into which a flexible tube is inserted is provided. If comprised in this way, the simple and reliable structure of an injector will be obtained.

  Further, in the method according to the present invention for solving the above-mentioned problem, as already described, a negative pressure is supplied to the yarn gripping nozzle disposed adjacent to the yarn running path so as to extend before the opening of the yarn gripping nozzle. In a method of operating a work portion of a rewinding machine that applies a suction action to a yarn, an injector disposed adjacent to the yarn runway is directed toward the yarn located on the yarn runway and to the yarn as necessary. A spray flow directed toward the opening of the gripping nozzle was jetted. In other words, the spray flow is injected only when the suction action of the thread gripping nozzle is not sufficient.

  In a first embodiment of the method according to the invention, the injector is adapted to inject the spray stream during yarn breaks or yarn cuts. In this case, yarn breakage or yarn cut means normal yarn breakage that occurs naturally and intentional clearing cut to remove yarn defects. Of course, the injection of the spray flow is only meaningful when a negative pressure is supplied to the thread catching nozzle. Since the negative pressure supply to the thread grab nozzle is often interrupted during the piecing, it must be taken into account that the spray flow is jetted accordingly.

  When the yarn breaks, a free yarn end portion is generated, and such a yarn end portion must be sucked in order to avoid winding at the work site and, consequently, production stoppage. In order to obtain the prescribed correct state, clearer cutting is often performed when yarn breakage is recognized. The residual yarn generated at this time must be surely removed. When the clearer is cut to remove the yarn defect, the yarn end connected to the traverse package is often sucked into a yarn gripping nozzle disposed on the clearer, thereby preventing winding. Subsidizing the thread grab nozzle in such cases has a special meaning. By using the injector as in the present invention, the certainty that the yarn is sucked can be increased.

  In a second embodiment of the method according to the invention, the injector injects a spray stream in connection with the soiling of the running yarn, which is identified during the rewinding process. Normal dust removal is usually achieved reliably with a slight negative pressure by means of a thread grab nozzle. However, in the case of a large lump or a residual yarn adhered to the original yarn, the certainty can be increased by the aid of the injector. Such stains can be easily recognized and classified by the adaptation of known clearers, i.e. distinguished from yarn defects that need to be cut off.

It is a figure which shows the operation | work location by this invention provided with the thread clamp nozzle and the injector. FIG. 2 is a cross-sectional view taken along the line AA in FIG. 1 to show a thread gripping nozzle and an injector.

  Next, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows a side view of one working portion 2 of a yarn winding machine 1 (in the illustrated embodiment, an automatic traverse winder) during the winding process. Such an automatic traverse winder 1 has a large number of work places 2 of the same type, that is, a yarn winding back place, between both end portions (not shown).

  In these working places 2, since they are well known, they will not be described in detail here, but a spinning cup 9 having a small amount of yarn material produced in a ring spinning machine (not shown) usually has a large volume. Is rolled back into the twill roll package 11. The completed traverse package 11 is then handed over to the traverse package transport device 21 extending over the machine length using an automatically actuated service unit, for example a traverse package changer, and placed at the machine end. To a package loading station or the like.

  Such an automatic winding winder is further provided with a rotary magazine (Rundmagazin) for storing a spinning cup, or an automatic winding winder is a supply device (Logistikeinrichtung) formed as a cup / winding tube conveying system 3 have. In such a cup / winding tube transfer system 3, a spinning cup 9 or an empty tube arranged in a vertically standing state on the transfer tray 8 circulates. FIG. 1 shows only the cup supply section 4, the reversible drivable storage section 5, the lateral transport section 6 leading to the rewinding section 2, and the winding pipe return section 7. Has been. As shown in the drawing, the supplied spinning cups 9 are each positioned at the feeding position 10 located at the work position 2 in the region of the lateral conveyance section 6 and then rewound.

  The individual work points 2 are therefore known in the art and therefore have a wide variety of yarn monitoring and yarn processing devices, which are not described here in detail, and these yarn monitoring and yarn processing devices are equipped with fine spinning. It does not guarantee that the cup 9 is rewound into the high capacity traverse package 11, and that the yarn is monitored for yarn defects during the rewinding process and that the detected yarn defects are cleared. Guarantee. Each work site has a control device 40 which is connected to a yarn monitoring and yarn processing device via a schematically indicated control line.

  Each work location 2 has, for example, a rewinding device 24, and this rewinding device 24 has a package frame 18, and this package frame 18 is supported movably around a turning shaft 19. The rewinding device 24 further includes a package driving device 26 and a yarn traversing device 28.

  In the illustrated embodiment, the traverse package 11 is in contact with the driving roller 26 on its surface during the rewinding process, and is driven by friction by the driving roller 26. In this case, the drive roller 26 is driven by a reversible drive device (not shown) whose rotation speed can be adjusted. In the illustrated embodiment, the yarn traversing at the time of winding around the traverse package 11 is performed using a yarn traversing device 28 having a finger yarn guide 29.

  The work location 2 further includes a yarn splicing device, preferably a splicing device 13 that works pneumatically, a lower yarn sensor 22, a yarn gripping body 14, a yarn clearer 15 equipped with a yarn cutting device 17, a yarn tension force sensor 20, an upper yarn. A sensor 39 and a paraffin coating device 16 are provided.

  Further, the work location 2 includes a suction nozzle 12 and a gripper pipe 25, and negative pressure is supplied to the suction nozzle 12 and the gripper pipe 25, respectively. In the illustrated embodiment, the suction nozzle 12 and the gripper pipe 25 are connected to a negative pressure line 32 of the automatic winding winder 1 that extends over the machine length, and this negative pressure line 32 is connected to a negative pressure source 33. Has been.

  In the illustrated embodiment, the area of the paraffin applicator 16 is provided with a thread gripping nozzle 23 which is arranged somewhat rearwardly with respect to the thread path, which is shown in detail in FIG. As shown, the thread 30 is positioned so that it passes in front of the opening 42 of the thread gripping nozzle 23 during the rewinding process. The thread gripping nozzle 23 is similarly connected to a negative pressure line 32 via an air branching device 27. In this case, the air branching device 27 has a connection pipe piece 35 for the thread gripping nozzle 23 and a pressure release pipe piece 36 having a capacity larger than that of the connection pipe piece 35. During normal rewinding operation, the suction nozzle 12 positioned at the standby position P is airtightly closed. When the opening of the pressure release pipe piece 36 is opened by the upward rotation of the suction nozzle 12, the negative pressure in the thread gripping nozzle 23 disappears. In this way, the yarn gripping nozzle 23 is out of operation during the yarn splicing process, and it is possible to reliably prevent the yarn with poor tension from being inadvertently sucked by the yarn gripping nozzle 23. A detailed description of the function of the air branch device 27 is given in DE 102005001093A1. However, it is also possible to supply the negative pressure continuously to the thread gripping nozzle 23 by omitting such an air branching device 27. In such a configuration, in some cases, the yarn loop sucked during or after the piecing process has to be pulled out from the yarn gripping nozzle 23 and defibrated together with the start of the work point 2 which is the rewinding point. .

  According to the invention, as shown in detail in FIG. 2, an injector 48 is arranged adjacent to the yarn runway 31 in the region of the yarn gripping nozzle 23. In the illustrated embodiment, the opening 42 of the thread gripping nozzle 23 is disposed behind the thread running path 31, that is, behind the thread 30 extending along the thread running path 31 as viewed in the direction of the operator's line of sight. The opening 51 of the injector 48 is disposed in front of the yarn path 31. By being arranged in this way, the opening 51 of the injector 48 can be directed in the direction of the yarn path 31 and in the direction of the opening 42 of the yarn gripping nozzle 23. The injector 48 includes a flexible tube 49 and a tube holder 50 having a curved guide portion. Since the flexible tube 49 is inserted into the curved guide, the injector 48 or the opening 51 of the tube 49 is positioned as described above.

  As can be seen from FIG. 1, the injector 48 is connected via a valve 47 to a pressure air line 45 extending over the machine length, which is connected to a pressure air line 46 from a central pressure air source 46. Is supplied. The valve 47 is connected to the control device 40 via the control line shown schematically, like other yarn monitoring and yarn processing devices.

  When thread breakage occurs in the upper region of the work location 2, this is detected by the upper thread sensor 39 or the thread tension sensor 20. For this purpose, the upper thread sensor 39 detects the movement of the thread 30 and the tension sensor 20 detects the tension of the thread. In order to obtain a prescribed state for a new splicing, cutting by the cutting device 17, so-called clearer cutting, is introduced by recognizing such thread breakage. The yarn end on the cut portion is wound on the traverse package 11 and is gripped with the suction nozzle 12 in the further course. The lower part of the thread is first clamped in the cutting device 17 during cutting. The residual yarn located between them does not necessarily need to be sucked by the yarn gripping nozzle 23. Therefore, an impulse is transmitted to the valve 47 by the control device 40 simultaneously with the start of the clearer cutting. As a result, the valve 47 is opened, a spray flow (Blasimplus) is applied to the residual yarn, and the residual yarn is moved toward the yarn gripping nozzle 23. As a result, the residual yarn is easily sucked by the yarn gripping nozzle 23. Can do. The splicing process is then continued as is known.

  During the normal rewinding process, the yarn is monitored for yarn defects by the yarn clearer 15 and the detected yarn defect is cleared, i.e. cut off. Even during such clearer cutting, the valve 47 is controlled by the control device 40, and a blowing flow is injected from the injector 48. The upper yarn, that is, the yarn end portion from the traverse package 11 is thereby securely held by the yarn gripping nozzle 23.

  In addition to detecting yarn defects that must be removed by clearing, the yarn clearer 15 can also detect dirt. The type of dirt, that is, the degree or type, is evaluated by the control device 40, and a spray flow is applied depending on the degree or type of dirt.

  DESCRIPTION OF SYMBOLS 1 Automatic traverse winder (rewinding machine), 2 Work location, 3 cups / winding pipe conveyance system, 4 cup supply section, 5 storage section, 6 transverse conveyance section, 7 winding pipe return section, 9 fine spinning cup, 10 Feeding place, 11 traverse package, 12 suction nozzle, 13 splicing device, 14 yarn gripper, 15 yarn clearer, 16 paraffin coating device, 17 yarn cutting device, 18 package frame, 19 swivel axis, 20 yarn tension force sensor, 21 Traverse package transport device, 22 Lower thread sensor, 23 Thread gripping nozzle, 24 Rewinding device, 25 Gripper tube, 26 Drive device, 27 Air branching device, 28 Thread traverse device, 29 Finger yarn guide, 30 Thread, 31 Thread Runway, 32 negative pressure line, 33 negative pressure source, 35 Connection pipe piece, 36 Pressure release pipe piece, 39 Upper thread sensor, 40 Control device, 42 Opening, 45 Pressure air conduit, 47 Valve, 48 Injector, 49 Flexible pipe, 50 Pipe holder, 51 Opening

Claims (8)

A rewinder (1), the negative pressure can be supplied yarn gripping nozzle is disposed adjacent to the yarn track (31) (23) is provided, the thread gripping opening of the nozzle (23) (42) In the rewinding machine (1) having the work point (2) directed toward the yarn runway (31), the injector (48) that generates the sprayed flow is connected to the yarn gripping nozzle (23) of the yarn runway (31). ) it has been arranged adjacent to the yarn track (31) on the opposite side to the opening of the injector (48) (51), towards the yarn (30) located in the yarn track (31), and Directed toward the opening (42) of the thread gripping nozzle (23) and provided with means (47, 40) for injecting a spray flow as required, spraying from the injector (48) The flow is directed transverse to the yarn track (31), Characterized in that the (30) adapted to blow toward the yarn gripping opening of the nozzle (23) (42), rewinder (1). The injector (48) is connected to a pressure air line (45), and the injector (48) is assigned as said means a valve (47) that enables injection of a spray flow. The rewinding machine (1) described. The winding machine (1) according to claim 2, wherein a control unit (40) for controlling the valve (47) as necessary is provided as the means. The opening (42) of the thread gripping nozzle (23) and the opening (51) of the injector (48) are arranged to face each other so that the yarn path is located between the both openings (42, 51). The rewinding machine (1) according to claim 1 . The injector (48) is formed as a flexible tube (49) and the opening (51) of the flexible tube (49) is positioned in front of the yarn runway (31) using a tube holder (50). The winding machine (1) according to claim 4, wherein the tube holder (50) comprises a curved guide part into which a flexible tube (49) is inserted. The yarn track (31) has a yarn gripping nozzle are adjacently disposed (23) supplies a negative pressure to the yarn gripping nozzle (23), prior to the opening (42) of the thread gripping nozzle (23) In a method of operating a rewinding machine (1) having a work location (2) adapted to apply a suction action to the yarn (30) traveling through
Yarn runway (31), a yarn gripping injector disposed adjacent to the yarn track on the opposite side (31) of the nozzle (23) (48) is optionally located in the yarn track (31) The spraying flow directed to the yarn (30) is directed laterally with respect to the yarn running path (31 ) and toward the opening (42) of the yarn gripping nozzle (23). A method of operating the rewinding machine (1) .   The method of claim 6, wherein the injector (48) injects the spray stream during a thread break or thread cut.   7. A method as claimed in claim 6, wherein the injector (48) injects a blast flow in connection with soiling of the running yarn identified during the rewinding process.

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