JP2004043184A - Ending device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an ending device for pneumatically connecting two thread ends, with a device for applying a liquid to splicing air, which includes a splicing head and a splicing passage having at least one compressed air suction opening, and is improved to be compact-size and realized in a simple form to surely perform ending for troublesome threads and prevent excessive contamination in the area of the ending device. <P>SOLUTION: This ending device 10 includes at least one suction opening 33, 46 connected to negative pressure sources 41, 44. A splicing passage 20 can be directly loaded with negative pressure through the suction opening 33, 46, whereby surplus liquid reaching the splicing passage 20 with splicing air through a compressed air suction opening 34 during a splicing process can be discharged from the splicing passage 20 before outflow. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a yarn splicing device for pneumatically connecting two yarn ends, wherein a device for adding liquid to splicing air is provided, a splicing head is provided, and the splicing head is provided. Of the type having at least one compressed air blowing opening.
[0002]
[Prior art]
Yarn tying devices have been known for many years in the context of automatic twill winding machines and are described in many protection rights registration documents.
[0003]
German Patent No. 3,935,536 describes, for example, a yarn splicing device (splicer) with a pneumatically loadable splicing head, which has a substantially circular cross-sectional splicing passage. It has. The upper surface of the splicing head is provided with a through slit for passing the yarn end to be spliced, through which a tangentially arranged compressed air blowing opening passes. The threading slit and thus the splicing channel can be closed by a pivotally mounted cover element during the splicing process.
[0004]
Such yarn splicers or the like are widely used in the textile industry and have in fact been found to be particularly advantageous in cotton yarns and cotton yarn mixtures. For yarns that are difficult to splice, such as flux yarns or linen yarns, it has been found to be advantageous if the splicing air has a slight humidity.
[0005]
The liquid in the splicing air makes the fibers slightly softer and improves the bonding after splicing. Furthermore, the water particles contained in the splicing air increase the kinetic energy of the splicing air, which is often advantageous for yarns that are difficult to splice.
[0006]
Such a yarn splicing device, also known as an aqua-splicer, has the drawback that it is very dirty. That is, the dirt existing in the surrounding air is combined with the surplus liquid flowing out of the aqua-splicer, and accumulates as a dirt film. Such yarn tying devices are used in principle in textile operations, in which the air often contains a large amount of dust and / or is contaminated with flying fiber debris, so that it is relatively fast. Large amounts of dirt accumulate, which makes periodic manual cleaning of the components of the device and its surroundings unavoidable.
[0007]
In order to avoid this time-consuming and difficult cleaning, it is already known to protect the thread splicing device and place it in a tank which can be closed tightly during the splicing process. Such a thread tying device, known for example from DE-A 10 105 296, comprises a tank which can be closed by means of a splicing cover, which has two water outlet channels. In this case, the water outlet groove is connected to a negative pressure source.
[0008]
Although such a construction reduces contamination in the area of the tying device, such a device has the disadvantage of having a relatively large space requirement. In other words, such a device is very difficult to mount, especially in the region of the rewind position of the automatic twill winding machine, especially afterwards.
[0009]
[Patent Document 1]
German Patent No. 3935536 [Patent Document 2]
DE 10105296 A1 [0010]
[Problems to be solved by the invention]
It is therefore an object of the present invention to improve a yarn splicing device of the type mentioned at the outset, to be compact, to be able to be realized in a simple manner, and to ensure even problematic yarns, in particular flux yarns and linen yarns. It is an object of the present invention to provide a device that can be connected and that does not cause excessive soiling in the area of the yarn connecting device.
[0011]
[Means for Solving the Problems]
According to the device of the present invention for solving this problem, the yarn joining device has at least one suction opening connected to a negative pressure source, and the splicing passage is directly connected to the suction opening via the suction opening. The excess liquid, which can be loaded with pressure and reaches the splicing passage together with the splicing air via the compressed air blowing opening during the splicing process, can be discharged from the splicing passage before flowing out.
[0012]
Advantageous embodiments of the invention are set out in the dependent claims.
[0013]
【The invention's effect】
At the Aqua-Splicer, excess liquid is created despite careful metering in adding water to the splicing air, which is unavoidably completely unavoidable. It is ensured that the added splicing air no longer flows out of the splicing head. That is, the embodiment of the yarn joining device of the present invention greatly reduces the degree of contamination of the yarn joining device. As a result, the time interval between individual cleanings can be extremely long. By incorporating at least one suction opening directly into the splicing head or cover element of the yarn splicing device, the yarn splicing device can also be made very compact, which, as is well known, means that the windings of automatic thread winding machines are known. This is advantageous because of the limited space requirements at the return position, for example, it can also be retrofitted to the already running textile machine of the yarn tying device according to the invention.
[0014]
According to an advantageous embodiment of the invention, the suction opening opens into the splicing passage in the region of the splicing passage. Such an arrangement provides, in a simple manner, a quick and effective suction of the excess liquid.
[0015]
Advantageously, in the region of the bottom of the splicing channel, a plurality of suction openings which can be loaded with a negative pressure are arranged (claim 3). The arrangement of the plurality of suction openings at the bottom of the splicing passage ensures that the excess liquid is immediately and completely sucked out and does not flow out of the splicing passage.
[0016]
The suction opening is preferably connected to the vacuum source via a common pneumatic line, and the vacuum reduction itself is connected to the collection vessel via an outlet line. The collection container contains excess liquid of splicing air. Such an embodiment provides a structurally simple and advantageous drainage of the excess splicing air liquid.
[0017]
Instead of the above-mentioned outflow line, it is of course also possible in an alternative embodiment to provide a circulation line (claim 5). Via such a circulation line, the excess liquid can be guided directly back into a storage container, preferably after flowing through the filter element, which stores the liquid into the splicing air. Prepare for That is, excess liquid is provided to be newly added to the splicing air.
[0018]
In a further alternative embodiment of the invention, as described in claim 6, the suction opening is integrated in the cover element of the lacing device. With the cover element closed in this case, the suction opening is positioned along the splicing path, which achieves a complete suction of the excess liquid.
[0019]
In this case, the suction lines are connected to one another on the inside of the cover element, preferably via cut-off passages (claim 7), the cut-off passages themselves being connected to the corresponding vacuum source via flexible suction lines. It is connected.
[0020]
A further special metering device is provided for adding liquid to the splicing air. In other words, a metering valve is provided in the suction / injection line extending between the liquid container of the yarn splicing device and the compressed air blowing opening, and the metering valve is connected to the winding position calculator via a control line. It is connected. The metering valve can be opened in a predetermined manner via the winding position calculator, so that the mixing of the splicing air can be controlled.
[0021]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, embodiments of the present invention will be described in detail with reference to the illustrated examples.
[0022]
FIG. 1 is a schematic front view of a textile machine for producing a twill package generally designated by reference numeral 1, in this embodiment, an automatic twill winding machine. Such automatic twill winding machines each have a number of identical working positions, in the present case rewinding positions 2, between the end frames in a general manner (not shown). In this unwinding position 2, a spinning cup 9, which is known and therefore not described in detail, for example, produced by a ring spinning machine, is rewound into a large volume twill package 15. After completion, the chain package 15 is delivered by a service unit which operates automatically to a machine-length chain package conveyor 21 and is conveyed to a package loading station or the like located at the end of the machine.
[0023]
In a general form, such an automatic chain winding machine 1 further comprises a logistic device in the form of a bobbin-winding tube transport system 3, in which the bobbin-winding tube transport system 3 has a vertical The spinning cup 9 or the empty tube directed to is circulated. In FIG. 1, of the bobbin and tube transport system 3, a cup supply section 4, a reversible drivable storage section 5, a horizontal transport section 6 leading to the rewind position 2, and a bobbin return guide section 7 are shown. .
[0024]
In addition, such an automatic winding machine 1 is in principle provided with a central control unit (not shown), which is connected via a mechanical bus to the individual working positions of the individual rewinding positions 2. It is connected to the computer 29 and further to the control unit of the service unit.
[0025]
The spinning pot 9 is rewound into a large volume twill package 15 at a feeding position AS located at the rewound position 2 in the region of the horizontal transport section 6. For this purpose, the individual rewinding positions are equipped with various devices which are known and therefore only suggestive, these devices ensuring the correct operation of the working position.
[0026]
These devices are, for example, the suction nozzle 12, the gripper tube 25, and the yarn joining device 10 as a yarn joining device. As shown in FIG. 1, the pneumatic yarn splicing device 10 is formed as a so-called aqua-splicer (wet splicer) in the present embodiment, and this yarn splicing device is used for normal yarn traveling. On the other hand, she is slightly withdrawn. The other devices (not shown) at the rewind position 2 include a yarn tension device, a yarn cleaning device, a paraffin processing device, a yarn cutting device, a yarn tension sensor, and a lower yarn sensor.
[0027]
The winding of the twill winding package 15 is performed by a so-called winding device 24. Such a winding device 24 is provided in particular with a package (bobbin) frame 28, which is movably supported about a pivot axis and which allows the twill package (bobbin) to be pivotable. A device for holding is provided. During the winding process, the traversing package 15, which is freely rotatably mounted on the package frame 28, rests on its upper surface on the grooved drum 14, and by means of this grooved drum 14 via a friction connection. Will be taken.
[0028]
As already mentioned, each rewind position 2 comprises a suction nozzle 12 and a gripper tube 25. The suction nozzle 12 is supported so as to be swivelable about a swivel axis 16, and the gripper tube 25 is supported so as to be swivelable about a swivel axis 26.
[0029]
FIG. 2 shows one embodiment of a yarn splicing device 10 formed as an aqua-splicer of the present invention. As can be seen from the drawing, the splicing passage 20 of the splicing head 19 communicates with one preferably centrally located compressed air blowing opening 34 and at least one additional suction opening 33.
[0030]
The compressed air blowing opening 34 is connected to a compressed air source 36 via a pneumatic line 35 provided with a direction switching valve 37. Further, a suction / injection pipeline 43 connected to the liquid container 18 communicates with the pneumatic pipeline 35. As shown, a metering valve 27 is provided in the suction / injection line 43, and the metering valve 27 is connected to the winding position calculator 29 via a control line 42. By this means, during the splicing process, a defined liquid is added to the splicing air supplied via the compressed air blowing openings 34, which in the case of certain substances, for example flux and / or linen Is particularly advantageous.
[0031]
The suction opening 33 is connected to a negative pressure source 41 via a negative pressure line 39 provided with a direction switching valve 40, and the negative pressure source 41 itself captures excess liquid through an outflow line 11. It is connected to the collection container 13. The surplus of the liquid that originally reached the splicing passage together with the splicing air via the outflow conduit 11 can be reliably discharged. A circulation line 17 may be provided instead of the outflow line 11 connected to the collection container 13. The circulation line 17 indicated by a dashed line in FIG. 2 connects the negative pressure source 41 directly to the liquid container 18, and regulates the pressure for splicing air from the liquid container 18 via the suction and injection line 43. Liquid is supplied to the dosing device. Like the metering valve 27, the directional control valve 37 and the directional control valve 40 are also connected to the winding position calculator 29 and can be controlled via a control line 38.
[0032]
The splicing head 19 is fixed to the base 22 of the yarn splicing device 10 via, for example, a screw connection (not shown). The splicing head 19 has a splicing passage 20 that opens forward in the assembled state. . The splicing passage 20 can be closed during the splicing process by a pivotally mounted cover element 23, which in this embodiment has a passage bottom 30 having a U-shaped cross section. As already described, at least one compressed air blowing opening 34 and at least one further suction opening 33 communicate with this passage bottom 30. As shown in the embodiment of FIG. 2, a plurality of suction openings 33 are preferably provided, which are arranged symmetrically, for example, with respect to the compressed air blowing passage 34 and have already been described. As described above, it is connected to the negative pressure source 41 via the negative pressure line 39.
[0033]
FIG. 3 shows an alternative embodiment of the yarn joining device 10 of the present invention. As in the embodiment of FIG. 2, the splicing passage 20 of the yarn joining device 10 has a compressed air blowing opening 34 and a suction opening 33 that can be loaded with a negative pressure. The compressed air blowing opening 34 is connected to a compressed air source 36 through a pneumatic line 35 provided with a directional switching valve 37. As shown in FIG. A liquid metering device is connected. The liquid metering device consists essentially of a metering valve 27 which can be controlled in a defined manner and which is connected to the liquid container 18 via a suction and injection line 43. 2, the suction line 33 is connected to a negative pressure source 41 via a line 39. The pipe 39 is provided with a direction switching valve 40 that can be controlled by a winding position calculator.
[0034]
In this embodiment, the device for sucking out excess liquid is incorporated in the cover element 23. That is, the cover element 23 has a cut-off passage 47 arranged parallel to the splicing passage 20, which is connected to the negative pressure source 44 via a flexible suction line 48. As shown in FIG. 3, the suction line 48 is further provided with a valve 45, which can be controlled in a predetermined manner by the winding position calculator 29 via a control line 49. The negative pressure source 44 is connected to the collection vessel 53 via an outflow pipe 51 or to the liquid container 18 via a circulation pipe 57 shown by a dashed line.
[0035]
Functions of the yarn joining device:
If the winding of one of the winding positions 2 of the automatic winding machine 1 is interrupted, for example due to a defined yarn cleaning device cut or yarn breakage, the suction nozzle 12 moves toward the yarn winding package 15 and stops. The yarn 31 is stored, and the upper yarn 31 is transported to the yarn joining device 10. That is, the upper yarn 31 accommodated by the suction nozzle 12 is passed through the splicing passage 20 of the splicing head 19 of the yarn splicing device 10 and the associated yarn cutting and clamping device (not shown).
[0036]
Simultaneously or subsequently, the lower thread 32 held by the thread tension device is received by the gripper tube 25. For this purpose, the gripper tube 25 first pivots into the area of the yarn tensioning device, at which position it sucks the lower thread 32, at the same time that the lower thread 32 is released from the yarn tensioning device. The gripper tube 25 pivots to the upper working position and brings the lower thread 32 into the splicing path of the splicing head 19 as well. In this case, the lower thread 32 is also passed through the associated thread cutting and clamping device.
[0037]
After closing the splicing head 19 with the cover element 23, the yarns 31 and 32 fixed to the yarn cutting and clamping device are cut, and in this case, the cut end of the cut lower yarn 32 is discarded by the gripper tube 25, The yarn end of the separated upper thread 31 is discarded by the suction nozzle 12.
[0038]
As is known, the thread ends of the upper thread 31 and the lower thread 32 projecting from the splicing passage 20 are drawn into one of the thread end preparation tubes (not shown) which can be loaded with a negative pressure, where it is advantageous. Is at least partially relieved from thread twisting pneumatically.
[0039]
The yarn ends of the upper yarn 31 and the lower yarn 32 thus prepared are then drawn into the splicing passage 20 by a so-called loop-type draw-in device (Schlaufenzier) or the like (not shown). Has a U-shaped or V-shaped passage bottom 30 in cross section, for example. In other words, the yarn ends of the upper yarn 31 and the lower yarn 32 slide to the passage bottom 30 of the splicing passage 20, where the yarn ends pass through the suction pipe 33 that can be loaded with a negative pressure after the opening of the direction switching valve 40. Fixed pneumatically via The individual fibers at the yarn ends of the upper yarn 31 and the lower yarn 32, which are initially arranged approximately parallel at the passage bottom 30 of the splicing passage 20, are then swirled together by a splicing air impingement. The splicing air is blown into the splicing passage 20 via the compressed air blowing opening 34 after the opening of the directional valve 37, to which liquid is previously added by suitable control of the metering valve 27. That is, the yarn ends of both the lower yarn 32 and the upper yarn 31 are spliced pneumatically by the splicing air, and the splicing air has a relatively high humidity. In order to prevent the surplus liquid arriving at the splicing passage 20 due to the splicing air collision from flowing out of the control passage 20 without control, this liquid is immediately sucked out and discharged via the suction opening 33.
[0040]
Excess liquid sucked in the splicing passage 20 reaches the collection container 13 through the outflow line 11 or is returned to the liquid container 18 through the circulation line 17. In any case, it is ensured that the excess liquid no longer flows out of the splicing head 19 of the yarn splicing device 10 and that the yarn splicing device 10 and the adjacent components cannot be contaminated.
[Brief description of the drawings]
FIG. 1 is a side view showing one working position of an automatic twill winding machine provided with the yarn joining device of the present invention.
FIG. 2 is a view showing one embodiment of the yarn joining device of the present invention.
FIG. 3 is a view showing another embodiment of the yarn joining device of the present invention.
[Explanation of symbols]
DESCRIPTION OF REFERENCE NUMERALS 1 automatic twill winding machine, 2 rewinding position, 3 bobbin-winding tube transport system, 4 cup supply section, 5 storage section, 6 horizontal transport section, 7 bobbin return guide section, 8 transport tray, 9 spinning cup, 10 yarn splicing Apparatus, 11 Outflow line, 12 Suction nozzle, 13 Collection container, 14 Drum with groove, 15 Aya winding package, 16 Revolving axis, 17 Circulation line, 18 Liquid container, 19 Splicing head, 20 Splicing passage, 21 Aya winding Package transport device, 22 base, 23 cover element, 24 take-up device, 25 gripper tube, 26 turning axis, 27 metering valve, 28 package frame, 29 work position calculator, 30 passage bottom, 31 upper thread, 32 lower thread, 33 suction opening, 34 compressed air blowing opening, 35 pneumatic line, 36 compressed air source, 37 directional switching valve, 38 control line 39 negative pressure line, 40 directional control valve, 41 negative pressure source, 42 control line, 43 suction and injection line, 44 negative pressure source, 45 valve, 47 cut-off passage, 48 suction line, 49 control line, 51 outlet line Road, 53 Collection container, 57 Circulation line, AS feeding position

Claims (8)

A yarn splicing device for pneumatically connecting two yarn ends, a device for adding liquid to splicing air is provided, a splicing head is provided, and a splicing passage of the splicing head is provided. , Having at least one compressed air blowing opening,
The yarn splicing device (10) has at least one suction opening (33, 46) connected to a negative pressure source (41, 44), and through the suction opening (33, 46), the splicing passage (20). ) Can be loaded directly at a negative pressure, so that during the splicing process the excess liquid that reaches the splicing passage (20) with the splicing air via the compressed air blowing opening (34) before the splicing passage (20). 20) A yarn splicing device, which can be discharged from the device. 2. The yarn splicing device according to claim 1, wherein the suction opening (33) communicates with the splicing passage (20) in the region of the splicing passage bottom (30). 2. The yarn splicing device according to claim 1, wherein a plurality of suction openings (33) are arranged in the area of the splicing passage bottom (30). 2. The yarn splicing device according to claim 1, wherein the negative pressure source is connected to a collecting container for excess liquid via an outflow line. . 2. The yarn splicing device according to claim 1, wherein the negative pressure source is connected via a circulation line to a liquid container for adding liquid to the splicing air. 2. The yarn splicing device according to claim 1, wherein the suction opening (46) is integrated in the splicing cover (23), and the splicing passage (20) is closed by the splicing cover (23) during the splicing process. 7. The yarn splicing device according to claim 6, wherein a plurality of suction openings (46) connected to each other via a cut-off pipe (47) are arranged inside the splicing cover (23). A device for adding liquid to the splicing air comprises a metering valve (27) which can be controlled in a predetermined manner, the metering valve (27) being connected via a suction line (43) to a liquid container (27). The yarn joining device according to claim 1, which is connected to (18).

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