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EP-4349753-B1 - YARN WINDER

EP4349753B1EP 4349753 B1EP4349753 B1EP 4349753B1EP-4349753-B1

Inventors

  • HASHIMOTO, KINZO

Dates

Publication Date
20260506
Application Date
20211027

Claims (11)

  1. A yarn winder (1) that winds a plurality of yarns (Y) around a plurality of bobbins (B) to form a plurality of packages (P), the yarn winder (1) comprising: a bobbin holder (24) that is arranged to extend in a predetermined direction and holds the plurality of bobbins (B) side by side in the predetermined direction; a plurality of traverse guides (32) for traversing each of the plurality of yarns (Y) along the predetermined direction; a traverse device (22) that includes at least one of the plurality of traverse guides (32) and is configured to drive the at least one traverse guide (32); and a movement drive unit (50) that moves the traverse device (22) at least in the predetermined direction, wherein the bobbin holder (24) is cantilevered to extend at least in a horizontal direction, and the yarn winder includes a contact roller (25) that is disposed to extend at least in the predetermined direction and applies a contact pressure to the plurality of packages (P); characterized in that the yarn winder includes an angle adjustment unit (27) configured to be able to adjust an angle of the traverse device (22) and the contact roller (25) with respect to the horizontal direction; and in that the yarn winder further comprises: a supporting member (26) that supports the traverse device (22) and the contact roller (25), and is configured to be movable by the angle adjustment unit (27), wherein the movement drive unit (50) is configured to move the supporting member (26) at least in the predetermined direction.
  2. The yarn winder (1) according to claim 1, wherein a traverse region (R) of the at least one traverse guide (32) is fixed with respect to the traverse device (22).
  3. The yarn winder (1) according to claim 2, wherein each of the plurality of traverse guides (32) is configured to traverse each of the plurality of yarns (Y) by two wing guides (34) that are being rotationally driven in opposite directions to each other, or attached to an arm (61) swingably driven.
  4. The yarn winder (1) according to any one of claims 1 to 3, wherein the traverse device (22) includes all of the plurality of traverse guides (32).
  5. The yarn winder (1) according to any one of claims 1 to 4, wherein the movement drive unit (50) includes a linear actuator (51) configured to be able to adjust a position of the traverse device (22) in the predetermined direction.
  6. The yarn winder (1) according to any one of claims 1 to 5, comprising a first controller (28), wherein the first controller (28) controls the movement drive unit (50) during a winding operation of winding each of the plurality of yarns (Y) around the plurality of bobbins (B).
  7. The yarn winder (1) according to any one of claims 1 to 6 comprising a position information acquisition unit (28) that acquires position information related to a position of a predetermined part of the plurality of bobbins (B) in the predetermined direction.
  8. The yarn winder (1) according to claim 7 comprising a second controller (28), wherein the second controller (28) controls the movement drive unit (50) before starting a winding operation of winding each of the plurality of yarns (Y) around the plurality of bobbins (B) based on the position information.
  9. The yarn winder (1) according to any of claims 1 to 8 comprising: a third controller (28), wherein the third controller (28) controls the movement drive unit (50) to reduce a position displacement in the predetermined direction between the traverse region (R) of the at least one traverse guide (32) and the bobbin (B).
  10. The yarn winder (1) according to any one of claims 1 to 9, wherein each bobbin (B) held by the bobbin holder (24) is formed with a slit (S) in which the yarn is threaded at an end portion on one side in the predetermined direction, the yarn winder (1) includes a fourth controller (28), and the fourth controller (28) controls the movement drive unit (50) to move the traverse device (22) to the one side at least in the predetermined direction during a winding operation of winding each of the plurality of yarns (Y) around the plurality of bobbins (B).
  11. The yarn winder (1) according to claim 10, wherein during the winding operation, the fourth controller (28) moves the traverse device (22) to the one side in the predetermined direction and then moves the traverse device (22) to the other side in the predetermined direction.

Description

BACKGROUND OF THE INVENTION The present invention relates to a yarn winder. JP 2012-158436 A and JP 2019-214474 A disclose a yarn winder that winds a plurality of yarns around a plurality of bobbins to form a plurality of packages. More specifically, the yarn winder includes a bobbin holder and a plurality of traverse devices (hereinafter, traverse devices). The bobbin holder extends along a predetermined direction and holds a plurality of bobbins arranged in the predetermined direction. Each of the plurality of traverse devices includes a traverse guide for traversing the yarn along the predetermined direction, and is arranged corresponding to each of the plurality of bobbins. The plurality of yarns are each traversed in the predetermined direction by the plurality of traverse devices while simultaneously rotating the plurality of bobbins by the bobbin holder, whereby the yarns are simultaneously wound around the plurality of bobbins. In recent years, lengthening of the bobbin holders has been promoted so that more bobbins can be held at one time. Along with this, various problems have occurred, and countermeasures against these problems have been taken. A first example of the problem and countermeasure will be described below. The above-described yarn winder is configured to adjust the shape of the package by applying a contact pressure to the outer circumference of the package by a contact roller extending substantially parallel to the bobbin holder. The bobbin holder is cantilevered substantially horizontally. In such a configuration, as the package gets thicker (the weight of the package increases) during the winding of the yarn, the bobbin holder gradually bends downward due to the weight of the package. The bending amount of the bobbin holder is larger toward the leading end side in the predetermined direction. When the parallelism between the bobbin holder and the contact roller fluctuates due to this, the contact pressure may vary among the plurality of bobbins, and the quality is liable to vary among the packages. Therefore, the yarn winder described in JP 2012-158436 A is configured to maintain the contact roller and the bobbin holder substantially in parallel by a tilting mechanism (angle adjustment unit) that actively tilts the contact roller. A second example of the problem and countermeasure will be described below. As shown in JP 2019-214474 A, a slit on which the yarn is threaded is formed at an end portion in the predetermined direction of each bobbin. JP 2019-214474 A discloses a yarn threading mechanism having a guide for threading a yarn to the slit. When the number of bobbins held at one time by the bobbin holder increases, the position of the slit may greatly change due to an error in the length of the bobbin, and a yarn threading error is liable to occur. Therefore, the yarn threading mechanism is configured to be able to adjust the position of the guide in the predetermined direction. This suppresses the occurrence of the yarn threading error. Further related art may be found in JP S58 224973 A which describes a synthetic fiber winder related to the preamble of claim 1. SUMMARY OF THE INVENTION While a countermeasure against the above problem associated with the lengthening of the bobbin holder is taken, the fluctuation in the positional relationship between the traveling range (traverse region) of the yarn and the bobbin associated with the driving of the traverse guide has not been regarded as a problem so far, and no countermeasure has been particularly required. However, the inventor of the present application has found that when the bobbin holder is further lengthened, a problem caused by the traverse region being displaced in the predetermined direction with respect to the bobbin may become apparent. That is, when the positional relationship fluctuates due to the lengthening of the bobbin holder, the yarn winding position on the bobbin in the predetermined direction fluctuates. Due to this, problems such as shape disturbance of the package may occur. An object of the present invention is to suppress the occurrence of the problem of the package formation caused by the fluctuation in the relative position between the traverse region and the bobbin in a predetermined direction in which the bobbin holder extends. The present invention is defined by the appended independent claim. The dependent claims describe optional features and preferred embodiments. According to the first aspect of the disclosure and invention, a yarn winder is a yarn winder that winds a plurality of yarns around a plurality of bobbins to form a plurality of packages, the yarn winder including: a bobbin holder that is arranged to extend in a predetermined direction and holds the plurality of bobbins side by side in the predetermined direction; a plurality of traverse guides for traversing each of the plurality of yarns along the predetermined direction; a traverse device that includes at least one of the plura