JP2020059583A - Yarn-piecing device and yarn winding device - Google Patents

Abstract

To provide a yarn-piecing device capable of successfully piecing even an elastic yarn.SOLUTION: A yarn-piecing device is constructed so that a yarn end is sucked from a suction port 32a of an untwisting pipe 32 when a yarn Y1 introduced into a yarn-piecing space 31a of a yarn piecing member 31 and gripped by a clamp 44 is cut by a cutter. In the yarn-piecing device, a guide member 45 having a contact surface 45a for bending the yarn Y1 by contacting the yarn Y1 laid between a cutter 41 and the yarn piecing member 31 formed is disposed between the cutter 41 and the untwisting pipe 32 in the vertical direction. When viewed from the longitudinal direction in which the untwisting pipe 32 is opened, at least a part of the contact surface 45a is located outside the suction port 32a in the lateral direction.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a yarn joining device and a yarn winding device including the yarn joining device.

  For example, the yarn splicing device (splicer) described in Patent Document 1 injects compressed air into the yarn splicing space in a state where the yarn ends of two yarns are introduced into the yarn splicing space formed in the yarn splicing member. Thus, the yarn ends are twisted together and spliced. A cutter is arranged on one side of the yarn joining member, and a clamp is arranged on the other side. Further, an untwisting pipe is arranged between the yarn joining member and the cutter. Then, when the yarn gripped by the clamp is cut by the cutter, the yarn end is sucked by the untwisting pipe and untwisted by the air flow in the untwisting pipe. After that, the untwisted yarn ends are pulled out from the untwisting pipe, and the yarn ends are spliced in a splicing space by a swirling flow.

Japanese Utility Model Laid-Open No. 4-42173

  However, when trying to splice a stretchable yarn (hereinafter referred to as an elastic yarn) such as a spandex yarn using the yarn joining device of Patent Document 1, there was the following problem. That is, in the case of the elastic yarn, when the yarn grasped by the clamp is cut by the cutter, it is vigorously contracted, so that there is a problem that the yarn end cannot be sucked well by the untwisting pipe and the yarn joining fails.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a yarn splicing device that can satisfactorily splice even an elastic yarn.

  A yarn joining device according to the present invention includes a yarn joining member in which a yarn joining space extending in a first direction is formed, a cutter arranged on one side of the yarn joining member in the first direction to cut a yarn, and A second clamp which is arranged on the other side of the yarn joining member in the first direction and which holds the yarn, and a clamp which is arranged between the yarn joining member and the cutter in the first direction and which is orthogonal to the first direction. A twisting pipe formed with a suction port that opens in a direction, and when the yarn introduced into the yarn joining space and held by the clamp is cut by the cutter, a yarn end is the suction of the untwisting pipe. A yarn splicing device configured to be sucked from a mouth, wherein the yarn between the cutter and the yarn splicing member is in contact with the yarn between the cutter and the untwisting pipe in the first direction. The contact surface that bends the thread is shaped with The guide member is disposed, and at least a part of the contact surface is located outside the suction port in the third direction orthogonal to the first direction when viewed from the second direction. Characterize.

  According to the present invention, when the elastic yarn is cut by the cutter, the yarn is guided so as to shrink toward the outside of the suction port by the portion of the contact surface of the guide member located outside the suction port. That is, it is possible to prevent the yarn from shrinking toward the suction port at the shortest distance, so that it is possible to avoid a failure in sucking and capturing the yarn end by the untwisting pipe. Therefore, according to the present invention, even with an elastic yarn, the yarn end of the yarn cut by the cutter can be reliably sucked by the untwisting pipe, and the yarn joining can be performed satisfactorily.

  In the present invention, the contact surface may be a flat surface, and a virtual extension line that extends the contact surface may pass through the outside of the suction port when viewed from the second direction.

  With such a configuration, the yarn cut by the cutter contracts while contacting the contact surface, so that the yarn is more reliably guided toward the outside of the suction port. Therefore, it is possible to reliably avoid the failure of suction and capture of the yarn end by the untwisting pipe, and to reliably suck the yarn end by the untwisting pipe.

  In the present invention, the contact surface may have a shape that extends toward the outside of the suction port in the third direction as the contact surface approaches the suction port in the first direction when viewed from the second direction.

  According to such a configuration, the yarn cut by the cutter contracts while coming into contact with the contact surface, so that the yarn behaves away from the suction port. Therefore, it is possible to more reliably avoid the failure of suction and capture of the yarn end by the untwisting pipe, and it is possible to more reliably suck the yarn end with the untwisting pipe.

  In the present invention, it is preferable that a collision member that collides with the yarn cut by the cutter before being sucked into the untwisting pipe is arranged on the virtual extension line.

  According to such a configuration, the yarn cut by the cutter contracts and collides with the collision member, so that the yarn is effectively prevented from contracting vigorously toward the suction port. Therefore, it is possible to more reliably avoid the failure of suction and capture of the yarn end by the untwisting pipe, and it is possible to more reliably suck the yarn end with the untwisting pipe.

  In the present invention, a separation distance of the portion of the contact surface located on the outermost side of the suction port in the third direction from the suction port in the third direction is preferably 1 mm or more and 3 mm or less.

  In order to surely suck the yarn cut by the cutter with the untwisting pipe, it is considered that the larger the distance between the contact surface and the suction port in the third direction, the more effective. However, if this separation distance is made too large, the yarn will bend greatly and the yarn path will become longer. Then, the length of the yarn end sucked by the untwisting pipe changes, and there is a possibility that untwisting cannot be performed as desired. Therefore, by defining the separation distance between the contact surface and the suction port in the third direction as described above, the yarn end can be reliably sucked by the untwisting pipe, and the untwisting can be favorably performed. .

  In the present invention, the guide member may be formed with a guide surface for guiding the yarn to the contact surface on a side farther from the suction port than the contact surface in the second direction.

  By providing the guide member with such a guide surface, when the yarn is guided into the yarn splicing space from the far side to the near side from the suction port in the second direction, the yarn is also well guided to the contact surface. You can

  In the present invention, the guide member may be fixed to a support plate that is attachable to and detachable from a support member that supports the untwisting pipe.

  The guide member of the present invention is effective for splicing elastic yarns, but may be unnecessary for general yarns having almost no elasticity. Even in such a case, with the above-described configuration, it is possible to deal with the change of the yarn type by only replacing the support plate without replacing the entire yarn joining device.

  In the present invention, the yarn end pulled out from the untwisting pipe is further provided with a regulating member formed with a regulating surface for introducing the yarn end into the yarn joining space through an inlet formed in the yarn joining member, When viewed from the second direction, the angle formed by the regulation surface with respect to the surface on which the introduction port is formed is a straight line connecting the center of the suction port and the end of the introduction port on the side closer to the untwisting pipe. It is preferable that the angle is smaller than the angle formed with respect to the formation surface.

  When splicing elastic yarn, not only when the yarn is cut with a cutter, but also when the yarn end is pulled out from the untwisting pipe, the yarn suddenly shrinks and the yarn end cannot be properly introduced into the yarn splicing space. There is. Therefore, by providing the above-mentioned regulating member, the yarn end can be pulled out from the untwisting pipe while bending the yarn at the end portion on the yarn joining member side of the regulating surface. Therefore, it is possible to prevent the yarn from abruptly contracting due to friction at the bent portion, and it is possible to favorably guide the yarn end pulled out from the untwisting pipe to the yarn joining space.

  In the present invention, the restriction member may be fixed to a support plate that is detachable from a support member that supports the untwisting pipe.

  The regulating member of the present invention is effective in splicing elastic yarns, but may be unnecessary in the case of general yarns having almost no elasticity. Even in such a case, with the above-described configuration, it is possible to deal with the change of the yarn type by only replacing the support plate without replacing the entire yarn joining device.

  A yarn winding device according to the present invention includes a yarn supplying unit that supplies a yarn, and a winding unit that is arranged at a position apart from the yarn supplying unit in the first direction and that winds the yarn supplied from the yarn supplying unit. And any one of the above yarn joining devices, which is arranged between the yarn supplying portion and the winding portion in the first direction.

  According to the present invention, even when winding an elastic yarn, the yarn end of the yarn cut by the cutter can be reliably sucked by the untwisting pipe at the time of yarn joining, and the yarn joining is performed well. It becomes possible.

It is a schematic block diagram of the automatic winder which concerns on this embodiment. It is a schematic block diagram of a winding unit. It is a figure which shows the yarn joining operation by a yarn joining device. It is a figure which shows the yarn joining operation by a yarn joining device. It is a figure which shows the yarn joining operation by a yarn joining device. It is a figure which shows the behavior of the thread | yarn around a guide member and a regulation member. It is a figure which shows the behavior of the thread | yarn around a guide member and a regulation member. It is a figure which shows the behavior of the thread | yarn around a guide member and a regulation member. It is a figure which shows a guide member. It is a figure which shows a regulation member. It is a figure which shows the modification of a guide member.

  Hereinafter, an example of an embodiment of the present invention will be described with reference to the drawings.

(Automatic winder)
FIG. 1 is a schematic configuration diagram of an automatic winder according to this embodiment. As shown in FIG. 1, the automatic winder 1 includes a plurality of winding units 2 arranged in one direction (corresponding to a yarn winding device of the present invention), and an arrangement direction of the winding units 2 along the plurality of winding units 2. It is provided with a doffing device 3 provided so as to travel freely and a machine stand control device 4 for controlling the entire automatic winder 1. In the following description, the left-right direction in FIG. 1 in which the plurality of winding units 2 are arranged is referred to as the “left-right direction”. In the following description, the direction perpendicular to the plane of FIG. 1 is the front-back direction, the front side in the direction perpendicular to the plane of FIG. 1 is “front side”, and the back side is “rear side”.

  The automatic winder 1 sends a signal from the machine body control device 4 to a control device (not shown) provided individually for each winding unit 2, and the winding bobbin B is unwound from each winding unit 2. The unwound yarn Y is wound to form the package P. Further, when the package P is completed in a certain winding unit 2, the doffing device 3 moves to a position facing the winding unit 2, and the completed package P is replaced with an empty winding tube Q. Further, the machine base control device 4 issues various commands to a control device (not shown) of each winding unit 2 and also monitors the operating state of the entire automatic winder 1 and sets and stores operating parameters.

(Winding unit)
Next, a detailed configuration of each winding unit 2 will be described. FIG. 2 is a schematic configuration diagram of the winding unit 2. The winding unit 2 forms a package P by winding the yarn Y unwound from the yarn supplying bobbin B on a winding tube Q while traversing the yarn Y. In the present embodiment, the yarn Y is assumed to be elastic yarn having elasticity such as spandex.

  As shown in FIG. 2, the winding unit 2 is unwound from the yarn supplying portion 11 that holds the yarn Y of the yarn supplying bobbin B in a state capable of being fed, and the yarn supplying bobbin B held by the yarn supplying portion 11. A yarn processing execution unit 12 that performs various processes on the yarn Y and a winding unit 13 that winds the yarn Y processed by the yarn processing execution unit 12 onto a winding tube Q to form a package P. . The yarn supplying unit 11, the yarn processing executing unit 12, and the winding unit 13 are arranged side by side in this order from bottom to top.

  The yarn supplying unit 11 includes a bobbin holding unit 15 that holds the yarn supplying bobbin B and an unwinding assisting device 16 that assists in unwinding the yarn Y from the yarn supplying bobbin B. The unwinding assisting device 16 has a tubular body 29 that covers the yarn supplying bobbin B from above. The cylinder 29 is moved up and down by a motor (not shown). In the unwinding assisting device 16, as the unwinding of the yarn Y progresses, the tubular body 29 is lowered to regulate the bulge (balloon) of the yarn Y being unwound and stabilize the tension of the yarn Y.

  The winding unit 13 includes a cradle 14 that rotatably holds the winding tube Q, and a traverse drum 18. The traverse drum 18 is rotationally driven by a drum motor (not shown). A spiral traverse groove 18a is formed on the outer peripheral surface of the traverse drum 18, and the yarn Y is traversed by the traverse groove 18a. Then, the traverse drum 18 rotates while traversing the yarn Y by the traverse groove 18a while being in contact with the package P formed on the winding tube Q, so that the package friction is generated by the contact friction with the traverse drum 18. P rotates in the winding direction, and the yarn Y unwound from the yarn supplying bobbin B is wound around the winding tube Q.

  The yarn processing execution unit 12 arranged between the yarn supplying unit 11 and the winding unit 13 includes a yarn feeler 19, a tension applying device 20, a yarn joining device 21, and a yarn clearer 22.

  The yarn feeler 19 is arranged between the unwinding assisting device 16 and the tension applying device 20, and detects the presence or absence of the traveling yarn Y.

  The tension applying device 20 applies a predetermined tension to the traveling yarn Y. In FIG. 2, a so-called gate type tension applying device 20 is shown as an example. In the gate-type tension applying device 20, a plurality of fixed gate bodies 20a and a plurality of movable gate bodies 20b are alternately arranged in the vertical direction. Then, by adjusting the horizontal position of the plurality of movable gate bodies 20b, tension is applied to the yarn Y running between the fixed gate body 20a and the movable gate body 20b.

  The yarn splicing device 21 detects when a yarn defect is detected by a yarn clearer 22 described later and the yarn Y is cut by the cutter 22a, when the yarn Y is cut during winding, or when the yarn Y of the yarn supplying bobbin B is cut. When exchanging the yarn supplying bobbin B when it is lost, the yarn Y on the yarn supplying bobbin B side (the yarn supplying unit 11 side) and the yarn Y on the package P side (the winding unit 13 side) that have been divided are spliced together. To do.

  The lower and upper sides of the yarn joining device 21 catch the yarn Y on the yarn supplying bobbin B side and guide it to the yarn joining device 21, and the yarn Y on the package P side to catch the yarn Y. An upper thread catching guide member 24 for guiding to the splicing device 21 is provided respectively. The lower thread catching guide member 23 is rotatable around a shaft 23a, and is swung up and down by being rotationally driven by a motor (not shown). The upper thread catching and guiding member 24 is also rotatable about the shaft 24a and is swung up and down by being rotationally driven by a motor (not shown). The lower thread catching guide member 23 and the upper thread catching guide member 24 are respectively connected to a suction source (not shown).

  The lower thread catching and guiding member 23 has a suction portion 23b at the tip thereof for sucking and catching the yarn end of the yarn Y on the yarn supplying portion 11 side. The lower thread catching / guiding member 23 turns upward and guides the yarn Y to the yarn joining device 21 in a state in which the yarn end of the yarn Y is caught by the suction portion 23b at the lower position.

  The upper thread catching and guiding member 24 has a suction mouth 24b at the tip thereof for sucking and catching the yarn end of the yarn Y on the winding section 13 side. The upper thread catching / guiding member 24 first swivels upward from below to position the suction mouth 24b in the vicinity of the contact point between the package P and the traverse drum 18, whereby the thread Y attached to the surface of the package P. Suction and capture the yarn end of. Then, the upper yarn catching and guiding member 24 guides the caught yarn Y to the yarn joining device 21 by turning downward from above after catching the yarn end of the yarn Y.

  The yarn splicing device 21 connects the yarn end of the yarn Y guided by the lower yarn catching guide member 23 and the yarn end of the yarn Y guided by the upper yarn catching guide member 24 into one yarn Y. To do. The configuration and operation of the yarn joining device 21 will be described later in detail.

  The yarn clearer 22 constantly obtains information on the thickness of the traveling yarn Y, and based on the information on the thickness of the yarn Y, detects an abnormal portion in which the thickness included in the yarn Y is thicker than a certain value. To detect as. Further, the yarn clearer 22 is additionally provided with a cutter 22a, and when the yarn clearer 22 detects a yarn defect, the cutter 22a immediately cuts the yarn Y.

(Yarn splicing device)
Next, the yarn joining device 21 will be described in detail with reference to FIGS. 3 to 5. 3 to 5 are views showing a yarn joining operation by the yarn joining device 21. 3 to 5 are views of the yarn splicing device 21 viewed from the left side, and FIGS. 3 to 5 are diagrams of the yarn splicing device 21 viewed from the front. The yarn joining device 21 includes a yarn joining member 31, a untwisting pipe 32, an upper guide plate 33, a lower guide plate 34, a yarn pulling lever 35, a yarn pressing lever 36, and the like. In the following description, the yarn Y on the yarn supplying unit 11 side is distinguished from the yarn Y1 and the yarn Y on the winding unit 13 side is distinguished from the yarn Y2, as necessary.

  The yarn splicing member 31 has a block shape and is attached to a support plate 38 fixed to the front surface of the support block 37. The yarn joining member 31 projects from the support plate 38 toward the yarn path (front side) along which the yarn Y travels. The yarn splicing member 31 is formed with a yarn splicing space 31 a that extends in the vertical direction (corresponding to the first direction of the present invention) so as to penetrate the yarn splicing member 31. Further, the yarn splicing member 31 is formed with a yarn insertion gap 31b communicating with the yarn splicing space 31a so as to open forward and penetrate the yarn splicing member 31 in the vertical direction. The yarn Y1 caught by the lower yarn catching guide member 23 and the yarn Y2 caught by the upper yarn catching guide member 24 are guided to the yarn joining space 31a via the yarn insertion gap 31b. The upper and lower openings of the yarn joining space 31a function as inlets 31c for introducing the yarn ends pulled out from the untwisting pipe 32 into the yarn joining space 31a, as described later.

  Nozzle holes (not shown) for ejecting compressed air are formed on the inner wall of the yarn joining space 31a. The nozzle hole is connected to a compressed air supply passage formed in the support block 37. With the yarn end of the yarn Y1 and the yarn end of the yarn Y2 arranged in the yarn splicing space 31a, a swirling flow is generated inside the yarn splicing space 31a by ejecting compressed air from the nozzle holes. Can be twisted together.

  The upper guide plate 33 is arranged above the yarn joining member 31. The upper guide plate 33 is formed with a guide groove 33a into which the yarn Y1 is introduced and a guide groove 33b into which the yarn Y2 is introduced. The guide groove 33a and the guide groove 33b are lined up with a space in the left-right direction, and the guide groove 33b is located on the right side of the guide groove 33a. A cutter 41 and a clamp 42 are provided on the upper guide plate 33. The cutter 41 is provided in the guide groove 33a. On the other hand, the clamp 42 is provided in the guide groove 33b.

  The lower guide plate 34 is arranged below the yarn joining member 31. The lower guide plate 34 is formed with a guide groove 34a into which the yarn Y1 is introduced and a guide groove 34b into which the yarn Y2 is introduced. The guide groove 34a and the guide groove 34b are arranged side by side with a space in the left-right direction, and the guide groove 34b is located on the right side of the guide groove 34a. The guide grooves 34a and 34b are located substantially directly below the guide grooves 33a and 33b, respectively. Further, a cutter 43 and a clamp 44 are provided on the lower guide plate 34. The cutter 43 is provided in the guide groove 34b. On the other hand, the clamp 44 is provided in the guide groove 34a.

  The untwisting pipe 32 is a cylindrical member extending in the front-rear direction, and is supported by the support block 37. The front end portion and the rear end portion of the untwisting pipe 32 are opened in the front-back direction (corresponding to the second direction of the present invention), and the opening of the front end portion functions as a suction port 32a for sucking the yarn Y. Two untwisting pipes 32 are provided to suck the yarn ends of the yarn Y1 and the yarn Y2, respectively. The untwisting pipe 32 for sucking the yarn Y1 is arranged between the yarn joining member 31 and the cutter 41 (upper guide plate 33) in the vertical direction. On the other hand, the untwisting pipe 32 for sucking the yarn Y2 is arranged between the yarn joining member 31 and the cutter 43 (lower guide plate 34) in the vertical direction.

  A nozzle hole (not shown) for ejecting compressed air is formed on the inner wall of the untwisting pipe 32. The nozzle hole is connected to a compressed air supply passage formed in the support block 37. By ejecting the compressed air from the nozzle hole, an air flow from the front to the rear is generated in the untwisting pipe 32. By the action of this air flow, the yarn end of the yarn Y can be sucked into the untwisting pipe 32 from the suction port 32a. Further, the yarn end of the yarn Y introduced into the untwisting pipe 32 can be untwisted by this air flow.

  A through hole 38a is formed in the support plate 38 at a position facing the untwisting pipe 32 (suction port 32a). Further, on the front surface of the support plate 38, a regulation member 46 is attached at the position where the through hole 38a is formed. As will be described later in detail, the restricting member 46 has a through hole 47a (see FIG. 7) that penetrates in the front-rear direction. The yarn end of the yarn Y is introduced into the untwisting pipe 32 through the through hole 47a of the regulating member 46, the through hole 38a of the support plate 38, and the suction port 32a of the untwisting pipe 32.

  A pair of yarn pulling levers 35 are vertically arranged with the yarn joining member 31 interposed therebetween. The upper yarn pulling lever 35 is arranged between the upper untwisting pipe 32 and the upper guide plate 33 in the vertical direction. On the other hand, the lower yarn pulling lever 35 is arranged between the lower untwisting pipe 32 and the lower guide plate 34 in the vertical direction. The pair of yarn pulling levers 35 are configured to integrally swing about a swing shaft (not shown) extending in the vertical direction. When the yarn pulling lever 35 swings rearward, the yarn Y guided in the yarn joining space 31a is pulled backward by the yarn pulling lever 35.

  A pair of yarn pressing levers 36 are arranged vertically with the yarn joining member 31 interposed therebetween. The upper yarn pressing lever 36 is arranged between the yarn joining member 31 and the upper yarn shifting lever 35 in the vertical direction. On the other hand, the lower yarn pressing lever 36 is arranged between the yarn joining member 31 and the lower yarn shifting lever 35 in the vertical direction. The pair of thread pressing levers 36 are configured to integrally swing about a swing shaft (not shown) extending in the vertical direction. When the yarn holding lever 36 swings rearward, the yarn Y guided in the yarn joining space 31a is pressed by the yarn holding lever 36. This prevents the twist from propagating beyond the yarn pressing lever 36 when the twist is applied to the yarn end of the yarn Y in the yarn joining space 31a.

(Yarn splicing operation)
Next, a yarn splicing operation when the yarn splicing device 21 splices the yarn Y1 and the yarn Y2 will be described with reference to FIGS. 3 to 5. FIG. 3 is a diagram showing a state immediately before the yarns Y1 and Y2 are cut by the cutters 41 and 43. FIG. 4 is a diagram showing a state where the yarn ends of the yarns Y1 and Y2 are sucked into the untwisting pipe 32. FIG. 5 is a diagram showing a state in which the yarn ends of the yarns Y1 and Y2 are arranged in the yarn joining space 31a.

  When the yarn Y is divided for some reason, as shown in FIG. 3, the lower yarn catching guide member 23 and the upper yarn catching guide member 24 cause the yarns Y1 and Y2 to pass through the yarn inserting gap 31b and the yarn joining space 31a. Will be introduced to. At this time, the yarn Y1 is also introduced into the guide grooves 33a and 34a, and the yarn Y2 is also introduced into the guide grooves 33b and 34b. In this state, by swinging the yarn pulling lever 35 backward and pulling the yarns Y1 and Y2 backward, the yarn Y1 is pushed into the guide grooves 33a and 34a, and the yarn Y2 is pushed into the guide grooves 33b and 34b. Be pushed into. In FIG. 3, the upper thread catching guide member 24 is simply indicated by a circle, but actually, the upper needle catching guide member 24 is provided with a rectangular suction mouth 24b as shown in FIG.

  Then, the yarn Y1 introduced into the guide groove 34a is held by the clamp 44, and then the yarn Y1 introduced into the guide groove 33a is cut by the cutter 41. At the same time, the yarn Y2 introduced into the guide groove 33b is held by the clamp 42, and then the yarn Y2 introduced into the guide groove 34b is cut by the cutter 43. Unnecessary portions of the cut yarns Y1 and Y2 are sucked by the lower thread catching guide member 23 and the upper thread catching guide member 24. When the yarns Y1 and Y2 are cut, an air flow from the front to the rear is generated in the untwisting pipe 32. Therefore, as shown in FIG. 4, the yarn end of the cut yarn Y1 is sucked into the upper untwisting pipe 32. Further, the cut yarn end of the yarn Y2 is sucked into the lower untwisting pipe 32. The yarn ends of the yarns Y1 and Y2 are untwisted by the airflow generated in the untwisting pipe 32.

  Subsequently, when the yarn pulling lever 35 is further swung rearward, as shown in FIG. 5, the yarn ends of the untwisted yarns Y1 and Y2 are pulled out from the untwisting pipe 32 and passed through the introduction port 31c. It is introduced into the yarn joining space 31a. Then, in a state where the yarn ends of the untwisted yarns Y1 and Y2 are introduced into the yarn joining space 31a, compressed air is jetted into the yarn joining space 31a, so that the yarn Y1 and the yarn Y2 are combined by the action of the swirling flow. Is spliced. Before injecting the compressed air, the yarn pressing lever 36 is swung backward and the yarns Y1 and Y2 are pressed by the yarn pressing lever 36. This can prevent the twist from propagating beyond the yarn pressing lever 36 during yarn joining. When the yarn splicing is completed, the yarn shifting lever 35 and the yarn pressing lever 36 are returned to the initial positions, and the winding of the yarn Y by the winding unit 13 is restarted.

(Problems when splicing elastic threads)
When the yarn splicing device 21 configured as described above is used to splice a stretchable yarn such as a spandex yarn (hereinafter referred to as an elastic yarn), the following problems occur. That is, in the case of an elastic yarn, when the yarn Y1 gripped by the clamp 44 is cut by the cutter 41, the yarn Y1 contracts vigorously, so that the yarn end of the yarn Y1 cannot be sucked by the untwisting pipe 32 and the yarn joining fails. There was a problem. The same problem may occur when the yarn Y2 grasped by the clamp 42 is cut by the cutter 43. Moreover, when the yarn ends of the yarns Y1 and Y2 sucked by the untwisting pipe 32 are pulled out from the untwisting pipe 32, the yarns Y1 and Y2 shrink vigorously. I couldn't do it.

  In the yarn joining device 21 of the present embodiment, a guide member 45 and a regulating member 46 are provided in order to solve the above-described problems when joining an elastic yarn. As shown in FIG. 3 and the like, a pair of guide members 45 are vertically arranged with the yarn joining member 31 interposed therebetween. Similarly, a pair of regulating members 46 is also arranged vertically with the yarn joining member 31 interposed therebetween. The lower guide member 45 and the restricting member 46 are arranged at positions where the upper guide member 45 and the restricting member 46 are rotated 180 degrees with the center of the yarn splicing space 31a when viewed from the front as the rotation axis. The upper guide member 45 and the regulating member 46 act on the yarn Y1, and the lower guide member 45 and the regulating member 46 act on the yarn Y2. However, there is no difference in other points, and the same actions and effects are obtained. Therefore, below, the upper guide member 45 and the regulation member 46 will be described, and the description of the lower guide member 45 and the regulation member 46 will be omitted.

(Guide member)
6 to 8 are diagrams showing the behavior of the yarn Y1 around the upper guide member 45 and the regulating member 46, and are views seen from the front. 9A is a perspective view showing the guide member 45, FIG. 9B is a view of the guide member 45 seen from the front, and FIG. 9C is a view of the guide member 45 seen from below. It is a figure.

  As shown in FIG. 3 and the like, the guide member 45 is arranged between the untwisting pipe 32 and the cutter 41 (upper guide plate 33) in the vertical direction, and the yarn between the cutter 41 and the yarn joining member 31 is arranged. Bend Y1. As shown in FIG. 9, the guide member 45 is formed in a truncated pyramid shape protruding forward from the support plate 38, and is fixed to the support plate 38. The guide member 45 is formed with a contact surface 45a with which the yarn Y1 introduced into the yarn joining space 31a and the guide grooves 33a and 34a comes into contact, and a guide surface 45b that guides the yarn Y1 to the contact surface 45a.

  The contact surface 45a is formed on the rear portion (portion on the support plate 38 side) of the guide member 45, and is a plane that is substantially perpendicular to the support plate 38 and faces the direction of the yarn Y1 (generally leftward). As shown in FIG. 6, when viewed from the front, the contact surface 45a is located outside the suction port 32a of the untwisting pipe 32 in the left-right direction (corresponding to the third direction of the present invention). The contact surface 45a is an inclined surface that is inclined with respect to the vertical direction, and the contact surface 45a has a shape that approaches the suction port 32a in the vertical direction (toward the lower side) and heads to the outside (left side) of the suction port 32a in the lateral direction. have. The lower left end R of the contact surface 45a, in other words, the portion R of the contact surface 45a located on the outermost side of the suction port 32a in the left-right direction is separated from the suction port 32a by 1 mm or more and 3 mm or less in the left-right direction. . The guide member 45 is arranged so that a virtual extension line L obtained by extending the contact surface 45a passes outside the suction port 32a.

  The guide surface 45b is connected to the front side of the contact surface 45a, as shown in FIG. As shown in FIG. 9C, the guide surface 45b is an inclined surface that is inclined with respect to the front-rear direction, and the guide surface 45b is closer to the contact surface 45a in the front-rear direction (toward the rear side) and also in the left-right direction. It has a shape that approaches the contact surface 45a (toward the left side). The rear end of the guide surface 45b and the front end of the contact surface 45a are connected to each other with a ridge line formed therebetween.

(Regulation member)
Next, the configuration of the restriction member 46 will be described with reference to FIG. The regulation member 46 has a structure in which a main body portion 47 and a mounting portion 48 are integrally formed. A through hole 47a, a first guide groove 47b, and a second guide groove 47c are formed in the body portion 47. The through hole 47a penetrates the main body portion 47 in the front-rear direction and communicates with the suction port 32a of the untwisting pipe 32 through the through hole 38a formed in the support plate 38. The first guide groove 47b and the second guide groove 47c are recesses formed on the front surface of the main body 47. The first guide groove 47b is formed generally upward from the through hole 47a, and has a role of guiding the yarn Y1 to the suction port 32a when the yarn end of the yarn Y1 is sucked by the untwisting pipe 32. On the other hand, the second guide groove 47c is formed from the through hole 47a toward the lower right side, and guides the yarn Y1 into the yarn joining space 31a when the yarn end of the yarn Y1 is pulled out from the untwisting pipe 32. Have a role.

  The attachment portion 48 is a block-shaped member, and the restriction member 46 can be attached to the support plate 38 by fixing the attachment portion 48 to the support plate 38 with a screw. As shown in FIG. 6, the restriction member 46 is fixed to the support plate 38 so that the attachment portion 48 is located on the virtual extension line L of the contact surface 45 a of the guide member 45.

  Here, of the surfaces defining the second guide groove 47c, the restriction surface 47d formed on the yarn joining member 31 side will be described in detail. The regulation surface 47d forms an angle θ with the surface on which the introduction port 31c of the yarn joining member 31 is formed when viewed from the front. This angle θ is an angle φ formed by a straight line connecting the center O of the suction port 32a of the untwisting pipe 32 and the end S of the inlet 31c closer to the untwisting pipe 32 with respect to the surface on which the inlet 31c is formed. Has been made smaller than.

(Behavior of elastic thread)
How the yarn Y1 behaves when the yarn joining device 21 is provided with the guide member 45 and the regulating member 46 is an elastic yarn will be described with reference to FIGS. 6 to 8. FIG. 6 is a diagram showing a state immediately before the yarn Y1 is cut by the cutter 41. FIG. 7 is a diagram showing a state immediately after the yarn Y1 is cut by the cutter 41. FIG. 8 is a diagram showing a state in which the yarn end of the yarn Y1 is pulled out from the untwisting pipe 32.

  Before the yarn Y1 is cut by the cutter 41, the yarn Y1 between the cutter 41 and the yarn joining member 31 is in contact with the contact surface 45a of the guide member 45, as shown in FIG. Further, the yarn Y1 at this time is bent at the end R of the contact surface 45a and is arranged in the first guide groove 47b and the second guide groove 47c of the regulating member 46.

  When the yarn Y1 is cut by the cutter 41, the yarn Y1 shrinks vigorously in the direction of the arrow along the virtual extension line L, as shown in FIG. Since the direction is different from the direction toward the suction port 32a of the untwisting pipe 32, it is possible to prevent the yarn Y1 from shrinking toward the suction port 32a in the shortest distance, and the yarn end is sucked and captured by the untwisting pipe 32. Failures can be avoided. Further, since the mounting portion 48 of the regulating member 46 is arranged on the virtual extension line L, the yarn Y1 contracted along the virtual extension line L collides with the mounting portion 48, so that the yarn Y1 is guided to the suction port 32a. It is possible to effectively suppress the rapid contraction. Therefore, it is possible to more effectively avoid failure in suction and capture of the yarn end by the untwisting pipe 32, and it is possible to reliably suck the yarn end of the yarn Y1 by the untwisting pipe 32.

  After that, when the yarn end of the yarn Y1 is untwisted by the untwisting pipe 32 and the yarn shifting lever 35 is swung further backward, the yarn end is pulled out from the untwisting pipe 32. At this time, as shown in FIG. 8, the yarn Y1 is in contact with the regulation surface 47d of the regulation member 46. Further, since θ <φ (see FIG. 10) is set as described above, the yarn Y1 bends at the end of the regulating surface 47d on the yarn joining member 31 side. Therefore, it is possible to suppress the sudden contraction of the yarn Y1 due to the friction at the bent portion, and the yarn end of the yarn Y1 pulled out from the untwisting pipe 32 is satisfactorily guided to the yarn joining space 31a through the introduction port 31c. can do.

(effect)
The yarn joining device 21 of the present embodiment is to contact the yarn Y (Y1) between the cutter 41 and the yarn joining member 31 between the cutter 41 and the untwisting pipe 32 in the vertical direction (first direction). The guide member 45 in which the contact surface 45a for bending the yarn Y is formed is arranged, and at least a part of the contact surface 45a in the left-right direction (third direction) is viewed from the front-back direction (second direction). It is located outside the suction port 32 a of the untwisting pipe 32. When the yarn Y, which is an elastic yarn, is cut by the cutter 41, the portion of the contact surface 45a of the guide member 45 located outside the suction port 32a guides the yarn Y toward the outside of the suction port 32a. . In other words, it is possible to prevent the yarn Y from shrinking toward the suction port 32a in the shortest distance, and thus it is possible to avoid the failure of the yarn twisting pipe 32 to suck and capture the yarn end. Therefore, even if the yarn Y is an elastic yarn, the yarn end of the yarn Y cut by the cutter 41 can be reliably sucked by the untwisting pipe 32, and good yarn joining can be performed.

  In the present embodiment, the contact surface 45a is a flat surface, and the virtual extension line L obtained by extending the contact surface 45a passes through the outside of the suction port 32a when viewed from the front-rear direction. With such a configuration, the yarn Y cut by the cutter 41 contracts while contacting the contact surface 45a, so that the yarn Y is more reliably guided toward the outside of the suction port 32a. Therefore, it is possible to reliably avoid the failure of suction and capture of the yarn end by the untwisting pipe 32, and it is possible to reliably suck the yarn end by the untwisting pipe 32.

  In this embodiment, as viewed from the front-rear direction, the contact surface 45a has such a shape that the closer to the suction port 32a in the up-down direction, the closer the contact surface 45a is to the outside of the suction port 32a in the left-right direction. According to such a configuration, the yarn Y cut by the cutter 41 contracts while coming into contact with the contact surface 45a, and thus behaves away from the suction port 32a. Therefore, it is possible to more reliably avoid the failure of suction and capture of the yarn end by the untwisting pipe 32, and it is possible to more reliably suck the yarn end by the untwisting pipe 32.

  In the present embodiment, a regulating member 46 (collision member) on which the yarn Y cut by the cutter 41 collides before being sucked by the untwisting pipe 32 is arranged on the virtual extension line L. According to such a configuration, the yarn Y cut by the cutter 41 contracts and collides with the regulation member 46, so that the yarn Y can be effectively suppressed from being vigorously contracted toward the suction port 32a. Therefore, it is possible to more reliably avoid the failure of suction and capture of the yarn end by the untwisting pipe 32, and it is possible to more reliably suck the yarn end by the untwisting pipe 32.

  In the present embodiment, the distance R of the contact surface 45a located on the outermost side of the suction port 32a in the left-right direction from the suction port 32a in the left-right direction is 1 mm or more and 3 mm or less. It is considered that the larger the distance between the contact surface 45a and the suction port 32a in the left-right direction is, the more effective in reliably sucking the yarn Y cut by the cutter 41 with the untwisting pipe 32. However, if this separation distance is made too large, the yarn Y bends to that extent, and the yarn path becomes longer. Then, the length of the yarn end sucked by the untwisting pipe 32 changes, and there is a possibility that the desired untwisting cannot be performed. Therefore, by defining the distance between the contact surface 45a and the suction port 32a in the left-right direction as described above, the yarn end can be surely sucked by the untwisting pipe 32, and the untwisting is performed well. You can

  In the present embodiment, the guide member 45 is provided with a guide surface 45b that guides the yarn Y to the contact surface 45a on the side (front side) farther from the suction port 32a than the contact surface 45a in the front-rear direction. By providing the guide member 45 with such a guide surface 45b, when the yarn Y is guided in the yarn splicing space 31a from the side farther from the suction port 32a (front side) toward the closer side (rear side) in the front-back direction, The yarn Y can be guided well also to the contact surface 45a.

  In the present embodiment, the guide member 45 is fixed to a support plate 38 that is removable from a support block 37 (support member) that supports the untwisting pipe 32. The guide member 45 is effective when the elastic yarn is spliced, but may be unnecessary in the case of a general yarn having almost no elasticity. Even in such a case, with the above-described configuration, it is possible to cope with a change in the yarn type by replacing the support plate 38 without replacing the entire yarn joining device 21. Conventionally, in order to prevent the yarn Y from being sharply contracted when the yarn Y is cut by the cutter 41, a method in which the cutter 41 has a clamping function and the yarn Y cut by the cutter 41 is simultaneously clamped is known. It was taken. However, in this case, the cutter 41 needs to be changed in order to cope with the change in the yarn type, and the main part of the yarn joining device 21 has to be changed significantly, which requires a great deal of labor. In this respect, the configuration of the present embodiment, which only requires replacement of the support plate 38, is very advantageous.

  In the present embodiment, the regulation member 46 having the regulation surface 47d for introducing the yarn end pulled out from the untwisting pipe 32 into the yarn joining space 31a through the introduction port 31c formed in the yarn joining member 31 is provided. Furthermore, when viewed from the front-rear direction, the angle θ formed by the regulation surface 47d with respect to the surface on which the inlet 31c is formed is such that the center O of the suction port 32a and the end S of the inlet 31c on the side closer to the untwisting pipe 32. The straight line connecting to and is smaller than the angle φ formed with respect to the formation surface. With such a configuration, the yarn end can be pulled out from the untwisting pipe 32 while bending the yarn Y at the end of the regulating surface 47d on the yarn joining member 31 side. Therefore, it is possible to prevent the yarn Y from abruptly contracting due to friction at the bent portion, and it is possible to favorably guide the yarn end pulled out from the untwisting pipe 32 to the yarn joining space 31a.

  In the present embodiment, the regulation member 46 is fixed to the support plate 38 that is detachable from the support block 37 (support member) that supports the untwisting pipe 32. The regulating member 46 is effective when the elastic yarn is spliced, but may be unnecessary in the case of a general yarn having almost no elasticity. Even in such a case, with the above-described configuration, it is possible to cope with a change in the yarn type by replacing the support plate 38 without replacing the entire yarn joining device 21.

  The winding unit 2 (yarn winding device) of the present embodiment is arranged at a yarn supplying portion 11 that supplies the yarn Y and a position that is vertically separated from the yarn supplying portion 11, and is supplied from the yarn supplying portion 11. A winding unit 13 that winds Y is provided, and a yarn joining device 21 that is arranged between the yarn supplying unit 11 and the winding unit 13 in the vertical direction. Therefore, even when winding the elastic yarn, the yarn ends of the yarns Y1 and Y2 cut by the cutters 41 and 43 can be reliably sucked by the untwisting pipe 32 at the time of yarn joining, and the yarn can be satisfactorily obtained. It is possible to splice.

(Other embodiments)
A modified example in which various changes are made to the above embodiment will be described.

  In the above-described embodiment, the guide member 45 has a truncated pyramid shape. However, the specific shape of the guide member is not limited to this. Although the guide member 45 is provided with the guide surface 45b, the guide surface 45b may be omitted.

  In the above embodiment, the entire contact surface 45a of the guide member 45 is located outside the suction port 32a of the untwisting pipe 32 in the left-right direction. However, at least a part of the contact surface 45a may be outside the suction port 32a in the left-right direction.

  In the above embodiment, the contact surface 45a of the guide member 45 is an inclined surface that is inclined with respect to the vertical direction, but it is not essential that the contact surface 45a is an inclined surface. For example, as shown in FIG. 11A, the contact surface 51a of the guide member 51 may be parallel to the vertical direction. Further, as shown in FIG. 11B, the contact surface 52a of the guide member 52 may be a curved surface when viewed from the front-rear direction. As described above, the "contact surface that bends the yarn" in the present invention includes a curved surface that changes the direction of the yarn path by bending the yarn.

  In the above embodiment, the distance R of the contact surface 45a, which is located on the outermost side of the suction port 32a in the left-right direction, from the suction port 32a in the left-right direction is 1 mm or more and 3 mm or less. However, this separation distance may be less than 1 mm or more than 3 mm.

  In the above embodiment, the regulating member 46 (collision member) is arranged on the virtual extension line L. However, it is not essential to arrange the collision member on the virtual extension line L.

  In the above embodiment, the regulation member 46 is provided in order to suitably guide the yarn end pulled out from the untwisting pipe 32 to the yarn joining space 31a. However, the regulation member 46 may be omitted.

  In the above embodiment, the guide member 45 and the restriction member 46 are attached to the support plate 38. However, where to attach the guide member 45 and the regulating member 46 can be appropriately changed, and is not limited to the support plate 38.

  In the above embodiment, the present invention is applied to the yarn joining device 21 provided in the winding unit 2 of the automatic winder 1. However, the present invention can also be applied to a yarn joining device of other textile machines (for example, a pneumatic spinning machine).

2: Winding unit (thread winding device)
11: Yarn supply part 13: Winding part 21: Yarn splicing device 31: Yarn splicing member 31a: Yarn splicing space 31c: Inlet port 32: Untwisting pipe 32a: Suction port 37: Support block (support member)
38: Support plate 41, 43: Cutter 42, 44: Clamp 45: Guide member 45a: Contact surface 45b: Guide surface 46: Restricting member (collision member)
47d: Restriction surface Y, Y1, Y2: Thread L: Virtual extension line

Claims (10)

A yarn splicing member in which a yarn splicing space extending in the first direction is formed;
A cutter arranged on one side of the yarn joining member in the first direction to cut the yarn,
A clamp arranged on the other side of the yarn splicing member in the first direction for gripping the yarn,
A untwisting pipe that is disposed between the yarn joining member and the cutter in the first direction and has a suction port that opens in a second direction orthogonal to the first direction;
A yarn splicing device comprising: a yarn introduction end, which is introduced into the yarn splicing space and grasped by the clamp when the yarn is cut by the cutter; and the yarn end is sucked from the suction port of the untwisting pipe. hand,
A guide member is provided between the cutter and the untwisting pipe in the first direction, the guide member having a contact surface for bending the yarn by contacting the yarn between the cutter and the yarn joining member. And
At least a part of the contact surface is located outside the suction port in a third direction orthogonal to the first direction when viewed from the second direction. The contact surface is a flat surface,
The yarn splicing device according to claim 1, wherein a virtual extension line that extends the contact surface when viewed from the second direction passes through the outside of the suction port.   The said contact surface has the shape which goes to the outer side of the said suction port in the said 3rd direction, so that the said contact surface approaches the said suction port in the said 1st direction, when it sees from the said 2nd direction. Yarn splicing device.   The yarn joining device according to claim 2 or 3, wherein a collision member is arranged on the imaginary extension line to collide with the yarn cut by the cutter before being sucked by the untwisting pipe.   The separation distance of the portion of the contact surface located on the outermost side of the suction port in the third direction from the suction port in the third direction is 1 mm or more and 3 mm or less. The yarn splicing device according to any one of 4 to 4.   The guide member for guiding the yarn to the contact surface is formed on the guide member on the side farther from the suction port than the contact surface in the second direction. The yarn splicing device according to any one of claims.   The yarn joining device according to any one of claims 1 to 6, wherein the guide member is fixed to a support plate that is detachable from a support member that supports the untwisting pipe. The yarn end pulled out from the untwisting pipe is further provided with a regulating member having a regulating surface for introducing the yarn end into the yarn joining space through an inlet formed in the yarn joining member,
When viewed from the second direction, the angle formed by the restriction surface with respect to the surface on which the introduction port is formed is a straight line connecting the center of the suction port and the end of the introduction port on the side closer to the untwisting pipe. Is smaller than the angle formed with respect to the forming surface. The yarn splicing device according to any one of claims 1 to 7, wherein.   The yarn joining device according to any one of claims 1 to 8, wherein the regulating member is fixed to a support plate that is detachable from a supporting member that supports the untwisting pipe. A yarn supplying section for supplying a yarn,
A winding unit that is arranged at a position apart from the yarn supplying unit in the first direction and that winds the yarn supplied from the yarn supplying unit;
The yarn splicing device according to any one of claims 1 to 9, which is arranged between the yarn supplying unit and the winding unit in the first direction,
A yarn winding device comprising:

Images