JP2017115290A - Yarn splicing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a yarn splicing device by which raised fluff is reduced or eliminated in regions located upstream and downstream of a splicing yarn connection part.SOLUTION: The present invention relates to a yarn splicing device 10 for connecting an upper yarn 17 connected to a winding package and a lower yarn 18 connected to a delivery bobbin, including a splicing prismatic body 32 and yarn clamping/cutting units 36 and 36' located above and below the splicing prismatic body. The splicing prismatic body includes a splicing passage 34 and causes the fibers of the upper yarn and the lower yarn which can be inserted into the passage to be pneumatically entangled with each other. An upper rake element 37 and a lower rake element 38 are each arranged between the passage and the yarn clamping/cutting unit. The upper rake element and the lower rake element are configured so that the upper yarn or the lower yarn is changed in a direction at least twice in a plane located in an approximately transverse direction with respect to the insertion direction of both yarns.SELECTED DRAWING: Figure 2

Description

  The present invention is a yarn splicing device for splicing an upper yarn connected to a winding package and a lower yarn connected to a feeding bobbin, and includes a splicing prism and an upper side and a lower side of the splicing prism. A splicing prism having a splicing passage, and the splicing passage is used to aerodynamically feed upper and lower yarn fibers inserted into the splicing passage. The present invention relates to a yarn splicing device to be entangled.

  In the textile industry, yarn splicing devices have long been one of the prior art and are described in detail in many protection rights applications. For example, a yarn splicing device is known in which two yarn end portions are entangled by air vortex to form a spliced portion substantially equal to the yarn. Such splicing yarn splices are a decisive criterion for yarn quality. In other words, it is desirable that such a splicing yarn splicing portion not only has a strength similar to that of a yarn but also has an appearance equal to that of the yarn as much as possible.

  That is, when a yarn breakage occurs during the manufacturing process in a textile machine that manufactures a twill package, or when a clearing cut determined based on a yarn defect is performed in one of the winding units of the textile machine In addition, the yarn end of the cut yarn is first called back to the region of the yarn splicing device by means of a special pneumatic device. At this time, the suction nozzle retracts the so-called upper thread from the winding package, usually the traversed package, and this upper thread is removed into the splicing passage of the splicing prism of the thread splicing device after removing the yarn defect in some cases. set.

  The upper yarn is further inserted by a suction nozzle into a yarn clamping device disposed above the splicing passage and a yarn cutting device positioned below the splicing passage.

  Correspondingly, so-called bobbin thread, which is often called a yarn feeding bobbin and extends from the feeding bobbin positioned at the feeding point, is also inserted into the splicing passage using a gripper tube capable of supplying negative pressure and is arranged below the splicing passage. And a thread cutting device disposed on the splicing passage. Both yarn ends are then cut into lengths by respective yarn cutting devices and sucked into so-called holding and untwisting tubes where they are prepared for the subsequent splicing process.

  That is, the yarn end is first fully untwisted in the holding and untwisting tube, and then pulled back into the splicing passage by the yarn feeder, so that both yarn ends are opposite to each other in the splicing passage. Oriented side by side, located side by side, and finally entangled by aerodynamic forces.

  EP 1384696 (EP 1 384 696 B1), for example, discloses a yarn splicing device that can produce a spliced portion with sufficient strength even when the spun yarn has long fibers. Yes. In order to be able to fully untwist the yarn end, even for spun yarns such as hard-twisted wool, for example, separation elements are arranged in each untwisting nozzle (Aufdrehduese), thereby The untwisting nozzle is divided into two cross-section chambers and the yarn end collides with the separating element. In order to draw the yarn end from the untwisting nozzle into the splicing device, the yarn is deflected using a yarn shift lever, a yarn pressing device and one guide rod each.

  A drawback of such a known yarn splicing device is that a splicing yarn splicing section having an area with raised wings is formed before and after the splicing splicing portion. At this time, the thicker the yarn, the more prominent the fluffing in such a region may occur.

  Starting from the prior art described above, the object of the present invention is to form splicing splices in which elevated fuzz is reduced or eliminated in regions located before and after the splicing splice. It is to provide an improved yarn splicing device.

  This object is achieved according to the invention by a yarn splicing device configured as claimed in claim 1.

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

  In order to solve the above-mentioned problem, according to claim 1, the upper rake element and the lower rake element are respectively connected to the splicing passageway and the upper or lower side where the upper thread or the lower thread is inserted before the splicing. The upper rake element and the lower rake element extend in a direction in which the upper thread or the lower thread is substantially transverse to the insertion direction of the both threads. In the plane, the direction can be changed at least twice.

  If comprised in this way, an upper thread and a lower thread will be located in the labyrinth thread path of a corresponding rake element.

  Therefore, while the impact of the splicing air is applied, the upper and lower splicing prisms can no longer form the upper and lower thread rotating thread loops based on the splicing air flowing out while rotating. Such a “spiral-shaped” rotational movement of the upper thread and the lower thread may continue to a part of the thread clamp part in a conventionally known thread splicing device, causing a “stand-up phenomenon” of the thread. Finally, the fuzz of the yarn was increased before and after the splicing yarn joint. By limiting the freedom of movement of the upper and lower threads, the occurrence or spread of this “thread spiral” is prevented.

  In addition, fuzz is avoided or significantly reduced by the low friction of the yarn at each rake element.

  Experiments have confirmed that changing the direction of the upper or lower thread at least twice is necessary to effectively suppress the “helical” rotational movement. If the yarn is changed only once, or if the yarn can only be turned at a small angle without obtaining a change of direction, the impact of the splicing air flowing out at least will be at least partially partial Is transmitted to the upper thread or lower thread and still causes an increase in fluffing in the critical region.

  Thus, according to the configuration of the present invention, a splicing portion that does not show the characteristics of increased fluffing or roughening in the regions located upstream and downstream of the splicing yarn splicing portion, which is normal in the prior art. Is born.

  In a preferred embodiment as claimed in claim 2, the upper rake element or the lower rake element is arranged immediately adjacent to the inlet and outlet of the splicing passage.

  With such an arrangement, the freedom of movement of the upper thread and the lower thread is limited as much as possible. However, it is also possible within the framework of the invention for the upper rake element and / or the lower rake element to be spaced from the splicing prism, A gap is created between the rake element and the splicing passage. Even in such an arrangement, the “helical” rotational movement of the upper and lower threads due to the splicing air that flows out is suppressed or prevented, and no harmful increase in fluffing is guaranteed. .

  According to claim 3, the upper rake element or the lower rake element is made of a wear-resistant material.

  Such material selection is preferred. This is because the rake element can be produced with as much resistance as possible against friction-based wear. Furthermore, the wear-resistant surface usually has a smooth surface structure, which additionally acts smoothly on the passing yarn.

  Next, the present invention will be described in detail with reference to the illustrated embodiment.

It is a side view which shows the work unit of the automatic traverse winder provided with the thread | splicing apparatus which concerns on this invention. It is a figure which shows the thread | splicing apparatus which concerns on this invention provided with the upper and lower rake element.

  FIG. 1 schematically shows a textile machine, generally designated 1, for producing a traversed package, in the illustrated embodiment an automatic traverse winder, in a side view.

  As is well known, such an automatic traverse winder has a number of working units of the same type, in this embodiment a winding unit 2, between its end frames (not shown).

  In this winding unit 2, a spinning cup 9 manufactured in a ring spinning machine (not shown) is wound back on a large volume traverse package 15, and the traversing package 15 is an automatically operated service unit after completion. (Also not shown) is delivered to a traverse package transport device 21 extending over the machine length.

  In the illustrated embodiment, the automatic winding winder 1 further comprises a machine-specific supply device (Logistikeinrichtung) formed as a cup / winding tube transfer system 3.

  FIG. 1 merely shows a cup supply section 4, a reversible drivable storage section 5, a lateral transport section 6 leading to the winding unit 2, and a winding tube return section 7. In the system 3, the spinning cup 9 or the empty pipe circulates in a state in which it is arranged in the vertical direction on the conveying tray 8.

  The supplied spinning cup 9 is rewound onto the large-capacity traverse winding package 15 at the feeding position AS located in the winding unit 2 in the region of the lateral conveyance section 6.

  The individual winding units 2 are therefore provided with a wide variety of devices that ensure the orderly operation of these working units, which are therefore only shown here for reasons known in the art.

  These devices include, for example, a winding unit calculator 29, a suction nozzle 12 capable of supplying a negative pressure, which is movable around the turning axis 16, a gripper pipe 11 which is movable around the turning axis 13, and a gripper pipe 11 capable of supplying a negative pressure. This is an aerodynamic yarn splicing device 10.

  As shown schematically in FIG. 1, the aerodynamic yarn splicing device 10 is somewhat retracted with respect to a normal yarn running path, and its central housing 31 is fixed to a winding unit housing 33.

  As shown in FIG. 2, such a yarn splicing device 10 includes an upper and lower yarn clamp and cutting device 36 in addition to a splicing prism 32 having a splicing passage 34 capable of supplying air. Have. The splicing prism body 32 itself is disposed in the distribution block 35, and a holding and untwisting tube (not shown) is also inserted into the distribution block 35.

  For example, when a winding interruption occurs in the winding unit 2 based on controlled clearing cutting due to yarn breakage or yarn defect, the suction nozzle 12 causes the upper yarn 17 wound on the surface of the traverse winding package 15 to be wound. The upper thread 17 is recalled from the traverse package 15, the upper thread clamp / cutting device 36 ′, the upper rake element 37, the upper splicing path 34 in the splicing prism 32, and the lower side Is inserted into the yarn cutting device 40 of the yarn clamping and cutting device 36.

  At the same or almost the same time, the lower thread 38 is also provided by the gripper tube 11 and likewise the lower thread clamping and cutting device 36, the lower rake element 38, the splicing passage 34, and the upper thread clamping and cutting device. Positioned within the 36 'yarn cutting device 40'.

  Next, the yarn splicing device 10 is driven and controlled via the winding unit computer 29. That is, the yarn clamping and cutting devices 36 and 36 'having the clamping devices 39 and 39' and the cutting devices 40 and 40 'respectively clamp and cut the yarn end portions.

  Thereafter, compressed air is supplied to a holding / untwisting tube (not shown), whereby the yarn end is sucked into the holding / untwisting tube and fully untwisted there. Both yarn ends prepared in this way are pulled out of the holding and untwisting tube and positioned with a settable overlap in the splicing passage 34 of the splicing prism body 32.

  After the yarn end has obtained this optimal overlap, for example related to a wide variety of yarn parameters such as yarn material or yarn fineness, splicing air is supplied into the splicing passage 34 and the interior of the splicing passage 34 The yarn end portion positioned at the position is entangled with air. By the labyrinth yarn passages of the upper rake element 37 and the lower rake element 38 at the respective inlets of the splicing passage 34, the upper yarn 17 and the lower yarn 18 are strongly limited in their freedom of movement and rotate. However, it is guided so that it can no longer be rotated “in a spiral” by the splicing air flowing out.

  Subsequently, the yarn clamping and cutting devices 36 and 36 'are opened, and as a result, the yarn spliced by aerodynamic force is released. And a winding process can be newly started.

Claims (3)

A splicing device (10) for splicing an upper thread (17) connected to a winding package (15) and a lower thread (18) connected to a feeding bobbin (9), the splicing prism (32) ) And a yarn clamping and cutting device (36, 36 ') located above and below the splicing prism (32), and the splicing prism (32) has a splicing passage (34). The splicing passage (34) is a yarn splicing device (pneumatically entangled with the fibers of the upper yarn (17) and the lower yarn (18) that can be inserted into the splicing passage (34)). 10)
An upper rake element (37) and a lower rake element (38) are respectively connected to the splicing passageway (34) and the upper thread (17) or the lower thread (18) before the splicing or The upper rake element (37) and the lower rake element (38) are arranged between the upper thread clamp (17) or the lower thread clamp and cutting device (36, 36 '). The yarn splicing device, wherein the lower yarn (18) is configured to change the direction at least twice in a plane extending in a direction substantially transverse to the insertion direction of both yarns. .   2. The yarn splicing device according to claim 1, wherein the upper rake element (37) or the lower rake element (38) is arranged right next to an inlet and an outlet of the splicing passage (34).   The yarn splicing device according to claim 1, wherein the upper rake element (37) or the lower rake element (38) is made of a wear-resistant material.