JP7233946B2 - Yarn splicing device - Google Patents

Description

The present invention relates to a splicing device for pneumatically joining yarn ends, comprising a prismatic splicing head, which is directed upward during a splicing process. a defined and controllable yarn gathering device for positioning and fixing two yarn ends in said splicing passage having a pneumatically supplied splicing passage which is fully open at the and relates to a splicing device.

Splicing devices for pneumatically joining yarn ends have been known for a long time in different embodiments and are partly described in considerable detail in numerous patent applications.

A splicing device in which the splicing passages of the prismatic splicing head, which are open toward the upper side and which are supplied with air, are each closed by a special cover member during the splicing process, as well as the cover. There is also a splicing device with a prismatic splicing head that operates without members, that is, a splicing device in which the splicing passage of the prismatic splicing head remains open upward during the splicing process. It is publicly known.

DE 39 35 536 C2 (DE 39 35 536 C2) describes, for example, a splicing device in which a prismatic splicing head has a splicing channel with a circular cross-section. At least one tangentially arranged compressed air blow opening opens into the splicing channel, via which compressed air blow opening can be blown into the splicing channel. Furthermore, the splicing passage has a so-called "thread insertion slit" on its upper side, through which the yarn ends to be spliced can be inserted into the splicing passage. This thread insertion slit and thus the thread splicing channel of the prismatic splicing head is closed by a special cover member during the splicing process.

Comparative piecing devices are described in DE 199 21 855 A1 (DE 199 21 855 A1), DE 100 62 198 A1 (DE 100 62 198 A1) and/or It is also described in published application 10230760 (DE 102 30 760 A1). These known splicing devices differ, in particular, with respect to the width of the respective intermediately arranged thread insertion slit.

In the splicing device thus formed, the cover member can certainly prevent the yarn ends from being blown upward from the splicing passage by the splicing air that has flowed in during the splicing process. However, such splicing devices entail the considerable risk that the splicing air which has flowed in exerts a strong axial load on the yarn ends to be spliced. That is, the splicing air that has flowed into the splicing passage through the tangential compressed air blowing opening is deflected by the mounted cover member and flows toward the outlet of the splicing passage. In this case, axial force is transmitted to the yarn end.

This axial force of the splicing air causes the yarn ends, which are oriented in opposite directions to each other and are arranged in the splicing channel with a predetermined overlap, to move in the direction of the outlet of the splicing channel. I often get lost. This has a negative effect on the seam joints that are formed.

Splicing devices which operate without cover elements, i.e. splicing devices in which the splicing channel of the prismatic splicing head remains open upwards during the splicing process, are likewise known from various industrial property applications. is.

Such piecing devices are described, for example, in the translation of EP 1 118 570 (DE 600 09 437 T2) and/or in DE 10 2016 200 969 A1 (DE 10 2016 200 969 A1). ing.

These known splicing devices likewise each have a prismatic splicing head. This prismatic splicing head has a circular splicing channel in cross section which is supplied with air. This splicing passage has a yarn insertion gap for inserting the yarn ends to be spliced.
In these splicing devices, in order to prevent the yarn ends to be spliced from blowing out of the splicing passage through the yarn insertion gap opened upward during the splicing process, a splicing air supply is provided. Not only are the compressed-air blow-in openings of the often having a special arrangement and design, but also the thread insertion gap is often very specifically designed or arranged. That is, in these known splicing devices, the thread insertion gap is formed with overlapping members, as illustrated, for example, in the translation of EP 1 118 570 B1. As can be seen from DE 10 2016 200 969 A1, the thread insertion gap has a relatively small width and a curved course of the thread end in the thread insertion direction.

A piecing device of this type is certainly relatively compact in construction and can be produced relatively inexpensively due to the omission of an additional cover member, but the piecing device This method has the disadvantage that, after the process, the spliced yarn is often pulled out from the splicing passage of the prismatic splicing head with some difficulty.
This presents a significant risk that such a splicing device will cause the yarn to remain in the splicing channel of the prismatic splicing head after the splicing process, instead of automatically sliding out of the splicing channel. means that it is always full of This usually causes the thread to be damaged or to break again.

Starting from the splicing device of the form described above, one object of the invention is to ensure that the yarn end is reliably positioned in the splicing channel of the prismatic splicing head during the splicing process. On the one hand, it is guaranteed that the spliced yarn will immediately exit the splicing channel of the prismatic splicing head after the splicing process. It is to develop a device.

In order to solve this problem, according to the present invention, the yarn pulling-out assist means is provided in the yarn pulling-out device for applying a force in the direction of "advancing from the yarn joining passage" to the yarn formed by joining the yarn ends after the yarn joining process. Solved by being prepared.

Advantageous configurations of the invention are subject matter of the dependent claims.

The embodiment according to the invention of the sieve device has the advantage that in particular the spliced yarn is always actively subjected to a mechanical force by means of the sieve assist means arranged on the sieve device. That is, even if a relatively difficult situation is given to the region of the yarn insertion gap, the spliced yarn is always kept out of the splicing passage of the prismatic splicing head after the splicing process by the spliced yarn by the splicing auxiliary means. Immediate advancement is guaranteed.
The splicing device constructed according to the invention thus not only works very reliably, but is also considerably cheaper due to the omission of the covering element.

In an advantageous embodiment, the thread guide has two thread guide legs and two arms forming the thread release aid, which are situated on opposite sides of the two thread guide legs. is stipulated.

With this design, which is relatively simple and space-saving in terms of construction, the yarn ends to be spliced can be guided without problems into the splicing channel of the prismatic splicing head by means of the yarn guide legs and spliced. Not only is it ensured that the spliced yarn is properly fixed in the splicing passage during the splicing process, but also the spliced yarn is turned into a prismatic yarn after the splicing process by the arm of the spliced yarn assisting means. It is also reliably ensured that the yarn is always immediately unwound from the splicing channel of the splicing head.

In another advantageous embodiment, the arm of the yarn-picking assist means is positioned below the yarn end located in the splicing passage of the prismatic splicing head during the splicing process, It is placed in the thread puller.
One of the functions of the thread pulling device thus formed is that the thread pulling-out assisting means is applied to the thread ends of the needle thread and the bobbin thread arranged in the thread splicing passage of the prismatic splicing head during the splicing process. On the other hand, after the splicing process, a force can be effectively applied to the bound yarn by the arm of the yarn drawing-out assisting means so that the bound yarn is not affected negatively. It is ensured that the spliced yarn can be reliably removed from the splicing passage of the prismatic splicing head.
Moreover, in such an embodiment, relatively little control effort is required to move or position the arm of the thread pull-out aid of the thread puller in an orderly manner.

Advantageously, the thread guide leg of the thread puller and the arm of the thread pulling-out aid are arranged at a distance from the prismatic splicing head in the assembled state of the thread puller. This spacing reliably prevents the splicing process from being negatively influenced by the yarn guide leg or the arm of the yarn release aid.

Furthermore, in a preferred configuration, the splicing channel of the prismatic splicing head has a thread insertion gap which is arranged laterally offset with respect to the central longitudinal axis of the splicing channel, which It is provided that the walls of the thread insertion gap are preferably arranged tangentially to the walls of the piecing channel of the prismatic piecing head.
This is because such a thread insertion gap arranged laterally offset with respect to the central longitudinal axis of the splicing channel can cause the yarn ends to be blown out of the splicing channel during the splicing process. The positive blocking and the tangential arrangement of the walls of the thread insertion gap with respect to the walls of the splicing channel of the prismatic splicing head facilitate the mechanical unwinding of the spliced threads. means that

Further details of the invention can be taken from the exemplary embodiments described below with reference to the drawings.

1 is a schematic side view of one working unit of an automatic twill winder, which working unit comprises a piecing device, the yarn gathering device of which piecing device has the yarn ejection assisting means according to the invention; FIG. there is 1 is a perspective front view of a yarn splicing device formed according to the present invention, that is, a yarn splicing device comprising a prismatic splicing head and a yarn gathering device, wherein the yarn gathering device comprises two yarn guide legs; and a thread-pull-out assisting means formed by two arms. A prior art splicing device, in this embodiment a prismatic splicing head with a splicing passage closed by a cover member during the splicing process, and a known method for inserting the yarn ends to be spliced. 2 is a plan view of the shim-sewing device of FIG. 2, wherein the prismatic splicing head and the shirring device are shown spaced from each other for reasons of better visibility of the drawing. 1 is a plan view of a splicing device made in accordance with the invention having a prismatic splicing head with a splicing channel that is open during the splicing process and a splicing device with a splicing aid; FIG. Again, the prismatic splicing head and the jogger formed according to the invention are shown spaced from each other for the sake of better visibility of the drawing.

FIG. 1 shows a diagrammatic side view of one working unit 2 of a textile machine for producing twill packages, in this case an automatic twill winder 1 . An automatic twill winder 1 of this type has, between its end frames, a plurality of identical working units 2, often called winding units, as described above. In these so-called “winding units 2 ”, the spinning cops 9 , preferably produced on a ring spinning machine arranged upstream in the production process, are wound up into large-volume twill packages 15 . After completion, the twill package 15 is handed over to a twill package conveying device 21 corresponding to the mechanical length of the automatic twill winder 1 by a service unit (not shown) that operates automatically.

Furthermore, such an automatic twill winder 1 usually has a logistical device in the form of a bobbin and tube transport system 3 . In the bobbin and tube conveying system 3 described above, of which FIG. A spinning cop 9 or an unwound empty tube is circulated, positioned vertically on 8 .
The supplied spinning cops 9 are each unwound into large-volume twill packages 15 at unwinding positions 39 located within the transverse transport section 6 to the winding unit 2 . In order to be able to ensure an orderly winding operation, the individual winding units 2 are, in a known manner, connected to different devices, in particular suction nozzles 12 and gripper tubes 25, preferably pneumatically. and a splicing device 10 to work.

As shown in FIG. 1, the pneumatic yarn splicing device 10, which has a prismatic yarn splicing head 23 and a yarn gathering device 30, is arranged slightly withdrawn from the normal yarn running path. , with its splicer housing 34 attached to the winding unit housing 33 of the working unit 2 . Further, the splicing device 10 has an upper yarn clamping/cutting device 11, a lower yarn clamping/cutting device 17, and a holding/untwisting tube 18, as shown in FIG.

As already mentioned above, each of the winding units 2 has a vacuum-supplied suction nozzle 12 , which is pivotally mounted within a limited range about the pivot axis 16 , and is indicated by 26 . and a gripper tube 25 supplied with vacuum and having a pivot axis.

According to the embodiment of FIG. 1, the suction nozzle 12 is about to insert the thread end of the upper thread 31 pulled back from the twill package 15 into the splicer 10 or an attached functional member. there is
The gripper tube 25 simultaneously or slightly offset in time receives from the thread tensioner the thread end of the bobbin thread 32, which in this example is fixed in position on the thread tensioner specific to the working unit, and then the thread end of the bobbin thread 32. Similarly, the thread is threaded into the splicing device 10 or an attached functional member.

The twill package 15 to be produced is held freely rotatable in the package frame 28 of the winding device 24 during the winding process and is then resting with its surface on the yarn guide drum 14 . there is This yarn guide drum 14 drives the twill package 15 via a frictional connection while simultaneously traversing the wound yarn by means of the yarn guide groove.
Furthermore, such automatic twill winders 1 typically each have a central control unit 37 . This central control unit 37 is connected, for example, via a machine bus 38 to the work unit computers 29 of the individual winding units 2 .

FIG. 2 shows a piecing device 10 made in accordance with the invention in a perspective front view on a larger scale.
As can be seen, the splicing device 10 includes a prismatic splicing head 23 supplied with air, a holding/untwisting tube 18, an upper yarn clamping/cutting device 11, and a lower yarn clamping/cutting device 11. It comprises a device 17 and a thread gathering device 30 having a thread pulling out assisting means 13. - 特許庁
In the embodiment shown in FIG. 2, the suction nozzle 12 and the gripper tube 25 of the winding unit 2 are each positioned in a so-called "thread insertion position".
In other words, the suction nozzle 12 pulls back the yarn end of the upper yarn 31 from the twill package 15 and inserts it through the yarn insertion gap 20 into the yarn splicing passage 19 of the prismatic splicing head 23 . Thus, the thread end connected to the spinning cop 9 of the bobbin thread 32, which after controlled clearer breakage is normally fixed in position on the thread tensioner, is received by the gripper tube 25 and likewise passes through the thread insertion gap 20. It is inserted into the yarn splicing passage 19 of the prism-shaped yarn splicing head 23 through the thread splicing head 23 .
The prismatic splicing head 23 that is open upward is connected to the base body 22 via a screw fastening member 27, for example, even during the splicing process. A holding and untwisting tube 18 to which air is supplied is also fitted in the base body 22 .
As can be further seen, the thread end of the upper thread 31 is also connected to the thread clamping member 11' of the upper thread clamping and cutting device 11 and the thread cutting member 17'' of the thread clamping and cutting device 17 arranged below. correspondingly, the thread end of the bobbin thread 32 is inserted into the thread clamping member 17' of the lower thread cutting and clamping device 17 and the thread cutting member 11 of the upper thread cutting and clamping device 11. '' and is threaded.

The yarn gathering device 30 embodied according to the invention, which is pivotally mounted via a pivot shaft 40 and can be controlled and defined by a drive (not shown), has two yarn guide legs 35 . , and a so-called “thread drawing assist means 13 ” consisting of two arms 36 .
As is clear from FIG. 2, the arm 36 of the yarn pulling-out assisting means 13 is arranged in the yarn splicing passage 19 of the prismatic yarn splicing head 23 when the yarn gathering device 30 is turned inward. The needle thread 31 and the bobbin thread 32 are positioned below the thread ends of the needle thread 31 and the bobbin thread 32. In other words, the arm 36 of the thread pulling-out assisting means 13 positioned below the thread ends of the needle thread 31 and the bobbin thread 32 during the thread joining process is spliced when the thread gathering device 30 turns outward. A yarn is caught and spliced, and this spliced yarn is sent out from a yarn splicing passage 19 of a prismatic splicing head 23 through a yarn insertion gap 20.例文帳に追加Afterwards, the normal winding process can be resumed without problems with the exposed thread. That is, the winding unit 2 can be restarted in an orderly manner.

FIG. 3 shows a top view of a piecing device according to the prior art. For reasons of better visibility of the drawing, the prismatic splicing head 23 of the splicing device 10 and the associated yarn gathering device 30 are shown slightly spaced from each other.
In the illustrated embodiment, the splicing device 10 has a prismatic splicing head 23 . This prismatic splicing head 23 has a splicing passage 19 to which air is supplied. The splicing channel 19 is accessible for the yarn via a relatively wide thread insertion gap 20 which is preferably arranged within the central longitudinal axis 41 of the splicing channel 19 .
A compressed air blow-in opening 42 opens into the piecing channel 19, which is preferably circular in cross section.
Furthermore, the splicing passage 19 of the prismatic splicing head 23 is closed by the cover member 43 during the splicing process.
With the splicing device 10 thus formed, the spliced yarn is positioned within the central longitudinal axis 41 of the splicing passage 19 after the splicing process, i.e. when the winding process is restarted. It can be immediately slid out of the splicing passage 19 of the prismatic splicing head 23 through the wide thread insertion gap 20.例文帳に追加
This is because, as is well known, the splicing device 10 is arranged slightly retracted with respect to the normal yarn running path, so that as soon as the cover member 43 is moved away, the spliced yarns are oriented in the normal direction. This means that the yarn automatically returns faster in the direction of the yarn runway.

However, the known piecing device 10 is rather complicated to manufacture due to its cover member 43 and is correspondingly relatively expensive.

FIG. 4 shows in plan view an embodiment of a piecing device 10 made in accordance with the invention.
The splicing device 10 has a prismatic splicing head 23 . The splicing passage 19 of this prismatic splicing head 23 is open during the splicing process. Furthermore, the piecing device 10 has a yarn gathering device 30 provided with the yarn pulling-out assisting means 13 according to the invention.
Again, the prismatic splicing head 23 of the splicing device 10 and the associated splicing device 30 formed in accordance with the invention are shown spaced apart from each other for reasons of better visibility of the drawing. be.

As is apparent, the splicing device 10 has a prismatic splicing head 23 . This prismatic splicing head 23 has a splicing passage 19 to which air is supplied. The yarn can reach this splicing channel 19 via a yarn insertion gap 20 which is arranged laterally with respect to the central longitudinal axis 41 of the splicing channel 19 .
A compressed air blowing opening 42 opens into the splicing passage 19 . This compressed-air blow-in opening 42 is arranged in such a way as to avoid, as far as possible, a direct flow of blow-in air in the direction of the yarn insertion gap 20 .
In the assembled state, the splicing device 10 is arranged, as is customary, somewhat retracted with respect to the normal yarn runway, so that here too the yarn is forced out of the splicing channel 19 after the jogger 30 is released. immediately try to advance in the direction of the normal yarn runway.
However, in the case of a piecing device 10 which operates without a cover member and thus has an off-centre yarn insertion gap 20, as in the illustrated embodiment, the spliced yarns are prismatic. so that the yarn cannot exit the splicing passage 19 and is torn again at the beginning of the subsequent winding process, or There is always the danger of being injured.

In order to avoid this, the thread pulling-out device 30 has the thread pulling-out assist means 13 according to the invention. The thread pulling-out auxiliary means 13 consists of two arms 36. As shown in FIG. Both arms 36 rotate the thread ends of the needle thread 31 and the bobbin thread 32 placed in the thread splicing passage 19 of the prismatic splicing head 23 during the splicing process, when the swivel device 30 turns inward. is also positioned below.
That is, when the yarn gathering device 30 turns back to its starting position after the yarn splicing process is completed, the arms 36 of the yarn pulling assist means 13 catch the spliced yarn and pass the yarn through the yarn insertion gap 20. The yarn is surely sent out from a yarn splicing passage 19 of a prismatic yarn splicing head 23. - 特許庁
The winding process can then be resumed without problems.

Functions of a Yarn Plier Equipped with a Yarn Puller Developed According to the Invention During normal winding operation, the yarn puller 30 of the yarn splicer 10 is driven by the components of the yarn puller 10 to run the yarn. It is always parked at the starting position where it does not interfere with the insertion of the yarn end into the prismatic splicing head 23 of the splicing device 10.例文帳に追加
That is, the yarn guiding leg 35 of the yarn pulling device 30 is positioned adjacent to the yarn running path, and the arm 36 of the yarn pulling out assisting means 13 is positioned below the yarn running path.

For example, when a winding interruption occurs because the yarn clearer found an unacceptable yarn defect and started cutting the yarn clearer, first, the needle thread 31 is wound into the twill package 15, while the bobbin thread 32 is normally captured by the thread tensioner of the winding unit 2 .

The work unit computer 29, which recorded or initiated the winding interruption, then causes the thread end of the needle thread 31 to be picked up again by the suction nozzle 12 and transported by the downwardly swiveled suction nozzle 12 into the area of the piecing device 10. It has become. That is, the suction nozzle 12 inserts the thread end of the needle thread 31 guided by the thread guide thin metal plate into the thread splicing passage 19 of the prismatic splicing head 23 through the thread insertion gap 20 .

Subsequently or simultaneously, the gripper tube 25 receives the thread end of the bobbin thread 32 from the thread tensioner and feeds it through the thread insertion gap 20 into the thread splicing channel 19 of the prismatic splicing head 23 .

The thread ends of the top thread 31 and the bobbin thread 32 are then prepared for the splicing process. This means that the yarn ends 31, 32 are sucked, as is customary, into the holding and untwisting tube 18, where the yarn ends 31, 32 are at least partially untwisted. . Thereafter, the prepared yarn is positioned within the splicing passage 19 of the prismatic splicing head 23 by means of the splicing device 30 as required.
This means that the operating unit computer 29 of the relevant winding unit 2 starts a defined and controllable drive, preferably a stepper motor, via the control line. The stepping motor continues to turn the thread puller 30 inward, whereby the thread guide leg piece 35 of the thread puller 30 joins the thread ends of the needle thread 31 and the bobbin thread 32 into a square columnar thread. Not only is the head 23 neatly positioned in the splicing passage 19 , but also the arm 36 of the thread pulling-out assisting means 13 is arranged below the thread ends of the needle thread 31 and the bobbin thread 32 .

The yarn ends to be spliced are securely fixed in position by the yarn guide legs 35 of the yarn gathering device 30 and remain in a preset position during the subsequent splicing process.
Furthermore, since the splicing passage 19 of the prismatic splicing head 23 remains open during the splicing process, excess splicing air can escape upwards from the splicing passage 19 without problems, thereby providing an approximately A thread binding portion without thread unevenness is formed.

With corresponding control of the drive by the operating unit computer 29, the jogger 30 is then pivoted back into its starting position. At the time of return by turning, the arm 36 of the spliced yarn is caught by the arm 36 of the spliced yarn and passed through the yarn insertion gap 20 from the splicing passage 19 of the prismatic splicing head 23 in the direction of the regular yarn running path. Push out.
This means that the properly spliced yarn is subsequently slid back from the splicing channel 19 of the prismatic splicing head 23 into the normal yarn runway, so that the winding process can be restarted without problems.

REFERENCE SIGNS LIST 1 automatic twill winder 2 work unit 3 bobbin/tube conveying system 4 cop supply section 5 storage section 6 horizontal conveying section 7 winding tube returning section 8 conveying tray 9 spinning cop 10 yarn splicing device 11 yarn clamping/cutting device 12 Suction nozzle 13 Yarn ejection assisting means 14 Yarn guide drum 15 Twisted package 16 Rotating axis 17 Yarn clamping/cutting device 18 Holding/untwisting tube 19 Yarn splicing passage 20 Yarn insertion gap 21 Twisted package conveying device 22 Base body 23 Corner Pillar-shaped piecing head 24 Winding device 25 Gripper tube 26 Rotation axis 27 Screw fastening member 28 Package frame 29 Work unit computer 30 Yarn gathering device 31 Upper thread 32 Lower thread 33 Work unit housing 34 Housing 35 Thread guide leg 36 Arm 37 Central control unit 38 Machine bus 39 Unloading position 40 Pivot axis 41 Central longitudinal axis 42 Compressed air inlet 43 Cover member

Claims (6)

A splicing device (10) for pneumatically joining yarn ends, comprising a prismatic splicing head (23), wherein the prismatic splicing head (23) is used in a splicing process. It has a splicing passage (19) which is fully open upward and supplied with compressed air, and two yarn ends (31, 32) are positioned in the splicing passage (19). In a splicing device (10) comprising a defined and controllable sieve (30) for fixing the position of
The yarn gathering device (30) applies a force to the yarn formed after the yarn joining step by joining the yarn ends (31, 32) in the direction of advancing from the yarn joining passage (19). A piecing device (10), characterized by comprising a drawing assist means (13). Said thread puller (30) has two thread guide legs (35) and two arms forming a thread pulling-out assist means (13) located on opposite sides of both thread guide legs (35) respectively. A piecing device (10) according to claim 1, characterized in that it comprises (36). The arm (36) is positioned below the yarn ends (31, 32) located in the yarn splicing passage (19) during the splicing process. 3. A piecing device (10) according to claim 2, characterized in that it is arranged in the . The thread guiding leg piece (35) of the thread pulling device (30) and the arm (36) of the thread pulling out assisting means (13) are formed in the prism shape when the thread pulling device (30) is assembled. 4. A splicing device (10) according to claim 2 or 3 , characterized in that the splicing device (10) is spaced from the splicing head (23) of the . The splicing passage (19) of the prismatic splicing head (23) has a yarn insertion gap which is laterally displaced with respect to the central longitudinal axis (41) of the splicing passage (19). A piecing device (10) according to claim 1, characterized in that it comprises (20). Claim 5 , characterized in that the walls of the thread insertion gap (20) are arranged tangentially to the walls of the piecing channel (19) of the prismatic piecing head (23). A piecing device (10) as described.

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