Yarn winder

[0027] Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. figure 1 It is a perspective view showing the appearance of a winder according to an embodiment of the present invention. figure 2 It is a perspective view showing the appearance of the winding unit during the winding operation.

[0028] Such as figure 1 As shown, the winder (yarn winding machine) 10 of this embodiment has a plurality of winding units 11, a switching device 12, and a control unit (not shown). The winding unit 11 is a unit that winds an elastic yarn 20 such as spandex onto a winding tube 21 to form a package 22 of a predetermined length. In this embodiment, a polyurethane yarn is used as the elastic yarn 20. The switching device 12 is a device for replacing the winding tube 21 without stopping the supply of the elastic yarn 20 from the upstream when the package 22 becomes a full-wound state (predetermined length), and is capable of moving between the winding units 11 Structure. The control unit is a unit for controlling the various components of the winding unit 11 and the operation of the switching device 12. In addition, the detailed configuration of the switching device 12 will be described later.

[0029] Such as figure 2 As shown, the winding unit 11 has a frame body 30, a winding shaft 31, a contact roller holding portion 32, a traverse device 33, an operation unit 34, and a lifting frame 35.

[0030] The frame 30 is a member for holding the respective components of the winding unit 11 described later. The winding shaft 31 is a member for rotating the winding tube 21, and is connected to a drive mechanism (not shown) in the frame 30. The winding tube 21 is configured in a cylindrical shape, and is held in a state of being inserted into the winding shaft 31. The touch roller holding portion 32 rotatably supports the touch roller 36. The touch roller 36 is a member for rotating the elastic yarn 20 while contacting the yarn layer of the package 22 with a predetermined pressure during the winding operation, so that the winding operation of the elastic yarn 20 can be smoothly performed. The traverse device 33 is a device for reciprocating the yarn wound on the winding tube 21, and has a traverse yarn guide (not shown). The traverse yarn guide reciprocates the elastic yarn 20 by reciprocating while holding the elastic yarn 20.

[0031] The operation unit 34 is a unit for the operator to input various operations such as stopping the winding of the package 22 or starting the winding operation after the winding tube 21 is replaced, and is electrically connected to the above-mentioned control unit. The lifting frame 35 is a member for supporting the winding shaft 31 and the touch roller holding portion 32, and adopts a structure capable of moving relative to the frame 30 in the vertical direction. The distance between the winding shaft 31 and the contact roller holding portion 32 and the traverse device 33 can be adjusted by moving the lifting frame 35.

[0032] Such as figure 1 As shown, the winding unit 11 of this embodiment has a structure in which eight elastic yarns 20 conveyed from the upstream side of the winder 10 are wound on a common winding tube 21. In addition, the number of yarns wound on the common winding tube is not limited to 8. For example, 16, 32, 46, 64, etc., the structure of the present invention can also be used by changing the number of wound yarns.

[0033] Next, the switching device 12 will be described. The switching device 12 has a main body portion 51, an arm 52, a nozzle support member 53 and a nozzle (suction port) 54. The main body part 51 is a structure for holding each part of the switching device 12 mentioned later, and has the drive mechanism etc. for rotating the arm 52 inside. The arms 52 are composed of two arms as a set, and are rotatably supported on the front side and the back side of the main body portion 51. The nozzle support member 53 is formed in a cylindrical shape, and a plurality of nozzles 54 are arranged in parallel along a straight line parallel to the axial direction of the nozzle support member 53 on its outer peripheral surface. The nozzle support member 53 is rotatably supported in a state where it is supported by the top end of the arm 52 in a dual manner. Eight nozzles 54 are arranged corresponding to the number of elastic yarns 20 to be wound, and each nozzle 54 is formed with a penetrating hole for generating a suction flow.

[0034] The switching device 12 is configured to be connectable to a negative pressure source (not shown), and has a suction path for generating suction force of the negative pressure source in the nozzle 54 inside. In addition, a shutter is arranged at an appropriate place of the winder 10, and with this shutter, it is possible to switch whether or not to generate a suction flow in the vicinity of the nozzle 54. The closing device is electrically connected to the above-mentioned control unit, and controls the suction path by closing the suction path at a normal time and opening the suction path at an appropriate time to generate a suction flow near the nozzle 54. In addition, the closing device may also adopt a structure configured in the switching device 12.

[0035] In addition, the switching device 12 is supported by a traveling trolley (not shown). This traveling trolley adopts a structure capable of moving between the winding units 11 along a track not shown in the figure, and has an elevating mechanism for elevating the switching device 12 described above. The lifting mechanism adopts a structure that allows the switching device 12 to move relative to the trolley in the vertical direction, and uses, for example, a hydraulic cylinder as its driving mechanism. As a result, the switching device 12 can be moved in the left-right direction and the up-down direction, and therefore can be moved to an appropriate position without contacting each component of the package 22 and the winding unit 11. In addition, the switching device 12 and the traveling trolley are connected to the control unit, and are controlled to perform various operations in accordance with instructions from the control unit.

[0036] Refer below Figure 3 to Figure 8 The method of replacing the winding tube 21 is described. Figure 3 to Figure 8 The steps of removing the full-rolled package 22 by the winding tube 21 and installing the empty winding tube 21 in the winding unit 11 are shown in order to restart the winding operation.

[0037] When the package 22 of the winding unit 11 is close to the full winding state, the control unit uses the above-mentioned traveling trolley to move the switching device 12 to the winding unit 11. Such as image 3 As shown, when the package 22 becomes a fully wound state, the control unit raises the lifting frame 35 relative to the frame 30 to expand the distance between the contact roller holding portion 32 and the traverse device 33 and the winding shaft 31.

[0038] Next, the control unit raises the switching device 12 to a predetermined position using the above-mentioned lifting mechanism. Such as Figure 4 As shown, the switching device 12 raised to a predetermined position rotates the arm 52 to the side of the package 22, and moves the nozzle 54 to a capturing position between the package 22 and the contact roller 36, close to and opposite to the elastic yarn 20. When the nozzle 54 moves to the capturing position, the control unit uses the above-mentioned closing device to open the suction path, so that the nozzle 54 starts suction and reduces the rotation speed of the winding shaft 31.

[0039] The reduction in the rotation speed of the winding shaft 31 reduces the tension of the elastic yarn 20 on the upstream side of the package 22 and becomes a relaxed state. In this state, since the suction force of the nozzle 54 acts on the elastic yarn 20, the elastic yarn 20 whose yarn strength is lower than that of nylon yarn, polyester yarn, etc. cannot bear the load generated by the suction and is naturally cut and cut into rolls. The yarn on the side of loading 22 and the yarn on the upstream side of nozzle 54 are loaded. Thereby, the package 22 can be removed from the winding unit 11. On the other hand, the elastic yarn 20 continuously supplied from the upstream of the winder 10 is continuously sucked by the nozzle 54 until the winding operation to the new (empty) winding tube 21 is completed. While the elastic yarn 20 is being cut, the control unit performs control to stop the rotation of the winding shaft 31.

[0040] When the winding shaft 31 stops rotating, the operator performs the work of replacing the winding tube 21. Specific as Figure 5 As shown, in a state where the nozzle 54 of the switching device 12 continues to suck the elastic yarn 20, the operator presses the winding tube 21 to remove the package 22 from the winding shaft 31. Then as Image 6 As shown, the operator mounts the empty winding tube 21 to the winding shaft 31. Then the operation unit 34 is operated to start the winding operation.

[0041] When the operator inputs an instruction to start the winding operation to the operation unit 34, the control unit causes the winding shaft 31 to start rotating while accelerating the rotation until the rotation speed reaches a predetermined speed. When the rotation speed reaches a predetermined speed, the switching device 12 for the control unit starts Figure 7 The winding operation shown. Specifically, the winding operation is performed in the following order. First, the switching device 12 is lowered by the lifting mechanism. Next, the switching device 12 is moved to the side opposite to the winding shaft 31 with the traveling trolley. When moving to the opposite side of the winding shaft 31, the switching device 12 is raised by the lifting mechanism. Next, the switching device 12 rotates the arm 52 to the side of the new winding tube 21 (winding shaft 31), and moves the nozzle 54 to a winding position where the elastic yarn 20 attracted and captured by the nozzle 54 fully contacts the winding tube 21 . When the nozzle 54 moves to the winding position and the amount of yarn in contact with the winding tube 21 is sufficient, the suction of the nozzle 54 is stopped. Since the attractive force of the nozzle 54 is released, the yarn end of the elastic yarn 20 is wound on the circumferential surface of the rotating winding tube 21.

[0042] As described above, the movement of the switching device 12 and the rotation of the arm 52 cause the nozzle 54 in the state of catching the yarn to wind around the lower side of the winding tube 21, and move from the catching position to the position along the approximately U-shaped trajectory when viewed from the front. Coiling position. As a result, the elastic yarn 20 held by the nozzle 54 is in contact with the lower part of the winding tube 21 that is rotating, and is pulled upward by the nozzle 54 at the same time. Such as Figure 7 As shown, since the nozzle 54 of the winding position is located above the winding shaft 31, the yarn end of the elastic yarn 20 that has been released from the attractive force is well wound onto the new winding tube 21 located below.

[0043] In addition, the nozzle support member 53 has a structure that rotates with the movement of the switching device 12 when the nozzle 54 moves from the capturing position to the winding position, so that the tip of the nozzle 54 always faces the winding shaft 31 side. Thereby, even if the switching device 12 moves, the nozzle 54 can be smoothly moved from the catching position to the winding position without the elastic yarn 20 being wound around the nozzle support member 53.

[0044] The switching device 12 stops suction, and descends under the action of the above-mentioned lifting mechanism, and then stands by at an appropriate standby position until the operation of replacing the winding tube 21 of a certain winding unit 11 is performed. In the winding unit 11 with the winding tube 21 replaced, when the switching device 12 moves to the lower position, as Figure 8 As shown, the lifting frame 35 is lowered to the winding position where the winding operation is performed, and the contact roller 36 is brought into contact with the elastic yarn 20. Then, the winding operation of the new winding pipe 21 is started.

[0045] As described above, the winder 10 of this embodiment adopts the following structure. That is, the winder 10 has: a winding unit 11 having a winding shaft 31 for driving the winding tube 21 to rotate, and a winding unit 11 for catching and catching the elastic yarn 20 conveyed from the upstream of the winding shaft 31 by yarn suction. The switching device 12 of a plurality of nozzles (suction ports) 54. The replacement of the winding tube 21 is performed as follows: the elastic yarn 20 on the upstream side of the package 22 that has become a predetermined length is sucked and caught by the nozzle 54. In this state, the package 22 is removed from the winding shaft 31, and the The empty winding tube 21 is mounted on the winding shaft 31.

[0046] Thereby, the replacement operation of the winding tube 21 can be performed without stopping the supply of the elastic yarn 20. In addition, compared with a structure such as a turntable mechanism that performs winding tube replacement by changing the positions of a plurality of winding shafts, the structure of the winding unit 11 can be made simple and compact. Therefore, not only can the number of winding units 11 that can be arranged in a limited space be increased, and productivity can be improved, but also the manufacturing cost of each winding unit 11 can be reduced.

[0047] In addition, in the winder 10 of this embodiment, the yarn wound on the winding tube 21 is the elastic yarn 20.

[0048] Thereby, the structure of the winding unit 11 that winds the elastic yarn 20 can be simplified.

[0049] Furthermore, in the winder 10 of this embodiment, when the winding tube 21 is replaced, not only the nozzle 54 is used for suction and catching, but the rotation speed of the winding shaft 31 is reduced, thereby cutting the elastic yarn 20.

[0050] This eliminates the need for a special cutting mechanism such as a yarn cutter, and can realize a structure for cutting the elastic yarn 20 with low yarn strength with a simple structure. Therefore, the manufacturing cost of the winder 10 can be reduced.

[0051] In addition, in the winder 10 of the present embodiment, the nozzle 54 adopts an elasticity capable of moving from the yarn catching position on the upstream side of the catching package 22 to the elastic yarn caught by the nozzle 54 while sucking and catching the elastic yarn 20. The structure of the winding position where the yarn 20 is in contact with the empty winding tube 21. Then, the winder 10 stops the suction of the nozzle 54 after the nozzle 54 moves to the aforementioned winding position in a state where the nozzle 54 has caught the elastic yarn 20.

[0052] Thereby, the structure which automatically winds the elastic yarn 20 caught by the nozzle 54 to the empty winding tube 21 can be comprised easily.

[0053] In addition, in the winder 10 of this embodiment, a plurality of the aforementioned winding units 11 are arranged. In addition, a structure that enables the switching device 12 to travel between the winding units 11 is adopted.

[0054] Thereby, the switching device 12 can be moved to the place where the winding unit 11 of the winding tube 21 needs to be replaced when the winding tube 21 is replaced, and the replacement operation of the winding tube 21 is assisted. Therefore, the number of switching devices 12 required for the winder 10 can be suppressed, and the manufacturing cost can be reduced.

[0055] The preferred embodiments of the present invention have been described above, but the above-mentioned structure can also be changed as follows.

[0056] The structure of the switching device 12 of the above-described embodiment can be appropriately changed according to the situation. For example, the switching device can be changed to a structure having a telescopic arm, a structure in which the nozzle support member 53 is supported in a state where the arm on the front side of the device is cantilevered.

[0057] Furthermore, it is possible to replace the structure of the above-described embodiment with a structure in which each winding unit 11 has a switching device.

[0058] Furthermore, in the above-mentioned embodiment, the yarn is cut when the winding tube is replaced by controlling the suction flow of the nozzle 54 and the rotation speed of the winding shaft 31, but this structure can be changed. For example, it is possible to adopt a structure in which the switching device has a cutting mechanism for cutting the yarn supplied from the upstream side of the winder on the upstream side of the fully wound package.

[0059] In addition, although the winding unit 11 of the above-described embodiment adopts a structure in which the elastic yarn 20 is wound, it is not limited to this structure. For example, the structure of winding yarns other than the elastic yarn 20 made of nylon or polyester can also use the present invention. At this time, it is preferable to have the structure of the cutting mechanism described above from the viewpoint of reliably cutting the yarn.

[0060] In addition, although the operator performs the replacement operation of the winding tube 21 in the above-described embodiment, a configuration in which the winder 10 has a winding tube replacement device that mechanically performs the replacement operation of the winding tube 21 may be adopted.