JP3839294B2 - Yarn winding device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a yarn winding device including a traverse mechanism, a traverse fulcrum guide, and a yarn path turning guide.
[0002]
[Prior art]
In general, a winding device installed in a drawing false twisting machine or a false twisting material spinning machine for drawing a false drawing process of an undrawn yarn or a semi-drawn yarn is described in, for example, JP-A-6-16335. A cradle having an arm that rotatably holds both ends of the bobbin, a friction roller that rotates the bobbin, a traverse mechanism that is installed near and upstream of the friction roller, and an upstream side of the traverse mechanism A yarn path changing guide (yarn take-up rod) for changing the yarn path installed so as to be positioned on the (yarn supply side), and a fixed yarn guide for a swing fulcrum provided on the upstream side of the yarn path changing guide It is the composition provided with.
[0003]
The yarn path turning guide uses a 10 mm to 12 mm diameter rod whose surface is textured, and when the yarn is fed from below, both ends of the yarn path turning guide are attached to the machine frame by brackets or the like. When the yarn is fed from above, one end of the yarn path turning guide is attached to the machine frame in a cantilevered manner by a bracket or the like.
[0004]
[Problems to be solved by the invention]
In the winding device described above, the running direction of the yarn is changed by the yarn path turning guide, so that the yarn tension on the upstream side of the yarn path turning guide becomes smaller due to the frictional resistance of the yarn path turning guide. There is a problem in that thread slack is generated during switching operation and the like, and the thread switching fails due to winding around a yarn feeding feeder installed upstream of the fixed guide.
[0005]
If the diameter is reduced in order to reduce the friction resistance of the above-described yarn path turning guide, the strength and rigidity are reduced, and the yarn path turning guide may be bent or vibrated due to the tension fluctuation caused by traversing the yarn by the traverse mechanism. As a result, the winding tension greatly fluctuates, causing thread dropping and the like, and a predetermined package cannot be obtained.
[0006]
In particular, when the yarn is fed from above, the yarn must be wound around the bobbin held by the cradle with the yarn in contact with the lower surface of the yarn path turning guide when threading. There was a problem that the turning guide had to be supported in a cantilevered state, and the yarn path turning guide was bent due to insufficient strength.
[0007]
The present invention can prevent a decrease in yarn tension at the upper stream side of the frictional resistance is reduced yarn path deflection guide which has sufficient strength and rigidity, yarn take that can improve the yarn switching success rate The object is to provide a take-off device.
[0008]
[Means for Solving the Problems]
In order to solve the above-described problems, a yarn winding device according to the present invention includes a traverse mechanism for traversing a yarn and a traverse fulcrum guide for determining a traverse fulcrum of the yarn as described in claim 1. And a yarn path turning guide for changing the direction of the yarn to the traversing portion, the yarn path turning guide is constituted by an auxiliary bar and at least one yarn contact guide. The length of the yarn contact portion in the yarn traveling direction is 6 mm or less.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Figure 1 is a schematic of one embodiment of the yarn winding apparatus of the installed a draw texturing machine configuration of the present invention, a draw texturing machine supports a plurality of packages in multiple stages, transporting a yarn feeding device 2 to send the respective yarn by use tube in place, the first off I over Dorora 3 for feeding yarn disposed on the machine frame 1, a substantially horizontal state on top of the machine frame 1 The heating device 4 attached in the above, the cooling device 5 attached to the upper part of the machine frame 1 so as to be close to the downstream side of the heating device 4, and the downstream side of the cooling device 5 a false twist device 6 attached to the upper part of the machine frame 1, as a second full I over Dorora 7 for taking over yarn which is installed in the machine frame 1, the second full I over Dorora 7 by a predetermined distance the third full I over Dorora 8 for machine frame 1 the installed yarn feed to such that Yusuke, the third full I over Dorora 8 It is constituted by a winding device 9 attached in multiple stages in the machine frame 1 so as to be located towards.
[0011]
When the yarn is fed from above, the yarn winding device 9 is rotatably attached to a support member 11 installed on the machine frame 1 with a shaft 13 as a fulcrum as shown in FIGS. The supported cradle 12 for holding the bobbin, the traverse mechanism 14 installed on the support member 11, and the support member 11 so as to be close to the traverse mechanism 14 and located downstream (winding side) thereof. A roller 15 for rotation that is rotatably attached to the roller, and a yarn guide that is positioned upstream of the traverse mechanism 14 and is attached to the support member 11 by a bracket 17 so as to be supported in a cantilever state. And a traverse fulcrum of the yarn attached to the bracket 17 by a bracket (not shown) so as to be positioned at the traverse center on the upstream side (upper side) of the yarn path turning guide 16. Traverse fulcrum guide 8 and by the constructed.
[0012]
A yarn switching mechanism 19 is attached to the casing 40 of the traverse mechanism 14 so as to be positioned between the traverse mechanism 14 and the yarn path turning guide 16, and the yarn is wound around the empty bobbin 50 at the start of winding. Alternatively, a bobbin around which a predetermined yarn is wound is doffed, and the yarn is wound around the supplied empty bobbin.
[0013]
Without installing the yarn switching mechanism 19, the operator can manually perform the yarn switching operation, or the automatic switching robot can wind the yarn and perform the yarn switching operation from the full bobbin to the empty bobbin. .
[0014]
Holders 20 for holding the bobbin 50 are rotatably attached to both ends of the cradle 12.
[0015]
Although the bobbin 50 is rotated by the driving roller 15, the holder 20 holding the bobbin can be directly driven and rotated by an electric motor or the like.
[0016]
A traverse mechanism 14 rotates roller grooved rotatably attached to the casing 40 (not shown), engage the groove moves along the guide portion formed in the casing 40, the yarn traverse the tip And a traverse guide 21 having a swinging guide 22. Details of the structure of the traverse mechanism 14 are described in, for example, Japanese Patent Publication No. 1-44153.
[0017]
Needless to say, the traversing mechanism 14 can have a thread traversing groove formed in the driving roller 15 and the configuration thereof is not particularly limited.
[0018]
The yarn path turning guide 16 includes a large-diameter auxiliary bar 23 held by the bracket 17 and two auxiliary bars 23 held by the holding member 25 on the auxiliary bar 23 so as to be parallel to the auxiliary bar 23. And a small-diameter yarn contact guide 24.
[0019]
It goes without saying that the number of the yarn contact guides 24 is at least one and the number is not limited.
[0020]
When the yarn is fed from below, the winding device 9 is attached to the support member 11 so that the yarn path turning guide 26 is supported by the bracket 27 in a supported state as shown in FIGS. ing. It is possible to support the yarn path turning guide 26 in a cantilevered state.
[0021]
Further, the traverse fulcrum guide 18 is attached to the bracket 27 by a bracket (not shown) so as to be below the yarn path turning guide 26 and at the traverse center position.
[0022]
The yarn path turning guide 26 has a large-diameter auxiliary bar 28 and a single yarn contact guide 29 held by a holding member 30 on the auxiliary bar 28 so as to be parallel to the auxiliary bar 28. It is comprised by.
[0023]
The number of the yarn contact guides 29 is not particularly limited, and the same configuration as the yarn path turning guide 16 can be used.
[0024]
The other members and configuration of the winding device 9 are the same as those shown in FIGS.
[0025]
The above-described yarn path turning guides 16 and 26 are yarn path turnings in which one yarn contact convex portion 32a is formed on an auxiliary bar 32 which is a rod-like object having a circular cross section as shown in FIG. Four guides 34a for thread contact are formed on the guide 31 and the auxiliary bar 34 which is a rod-like member having a circular cross section as shown in FIG. Eight yarn contact projections 36a are formed on the yarn path turning guide 33 in contact with the yarn, and on the auxiliary bar 36 which is a rod-like object having a circular cross section as shown in FIG. It can be set as the yarn path turning guide 35 having a shape in which the yarn contacts the three yarn contact convex portions 36a.
[0026]
In this case, the auxiliary bars 32, 34, and 36 have a diameter dimension that does not cause bending, vibration, and the like, and at least one thread contact convex portion 32a, 34a, and 36a having a predetermined size is projected. I just need it.
[0027]
When a plurality of yarn contact projections are formed, if the yarn contact projections are worn, scratched, etc., the auxiliary bar is rotated so that the unused yarn contact projections run on the yarn. It can be easily dealt with simply by positioning it on the road.
[0028]
The yarn contact guides 24 and 29 and the yarn contact projections 32a, 34a, and 36a of the auxiliary bars 32, 34, and 36 are processed with a satin finish with a low frictional resistance and a chrome plating process to improve wear resistance. It is preferable to perform ceramic treatment or the like.
[0029]
In the above-mentioned drawing false twisting machine, a false twist is imparted by the false twisting device 6 in a state where the yarn is heated to a predetermined temperature by the heating device 4 and processed into a predetermined bulky processed yarn by the cooling device 5. Is fed at a predetermined speed by the second feed roller 7 and the third feeder 8, and the direction is changed by the yarn path turning guide 16 through the traverse fulcrum guide 18 of the winding device 9, and the traverse It is wound around the bobbin 50 rotated by the drive roller 15 while traversing by the screw mechanism 14.
[0030]
If yarn deflection guide 16 is constituted by a support bar 23 and the yarn contact guide 24, yarn that has been redirected over yarn deflection guide 16 contact only the yarn contact guide 24 contacts the support bar 23 Drive in a state that does not.
[0031]
If there is a gap between the auxiliary bar 23 and the yarn contact guide 24, the yarn contact guide 24 bends and can absorb the winding tension fluctuation. When the tension is high, the yarn contact guide 24 becomes larger. Tension fluctuations can be absorbed in a state of being bent and in contact with the auxiliary bar 23.
[0032]
[Example 1]
The winding device 9 described in FIGS. 2 and 3 is used, the diameter dimension (D) of the auxiliary bar 23 in the yarn path turning guide 16 is 14 mm, and the diameter dimension (d) of the yarn contact guide 24 is 3 mm. And the yarn was wound at a winding speed of 1000 m / min so that the length of the yarn contact portion in the yarn contact guide 24 was 6 mm. Although bending and vibration did not occur, the tension between the swing fulcrum guide 18 and the yarn path turning guide 16 was 3.8 CN by the yarn contact guide 24, but there was no hindrance to the winding operation. However, in rare cases, a small amount of thread slacking occurs and thread switching fails.
[0033]
[Example 2]
In the first embodiment, the auxiliary bar 23 has a diameter (D) of 8 mm, and the yarn contact guide 24 has a diameter (d) of 2 mm. The length of the yarn contact portion in the yarn contact guide 24 is as follows. When the yarn was wound in a state where the winding speed was 1000 m / min so as to be 2 mm, the tension between the swing fulcrum guide 18 and the yarn path turning guide 16 was 4.1 CN, and the auxiliary bar 23 In addition, the winding operation and the thread switching operation could be performed smoothly without causing any bending or vibration, and without any decrease in tension or slack in the yarn by the yarn contact guide 24.
[0034]
[Example 3]
In the first embodiment, the auxiliary bar 23 has a diameter (D) of 8 mm, and the yarn contact guide 24 has a diameter (d) of 2 mm. The length of the yarn contact portion in the yarn contact guide 24 is as follows. When the yarn was wound up at a winding speed of 1000 m / min with a winding speed of 1000 mm / min, the tension between the swing fulcrum guide 18 and the yarn path turning guide 16 was 4.1 CN, and the auxiliary bar 23 In addition, the winding operation and the thread switching operation could be performed smoothly without causing any bending or vibration, and without causing a decrease in tension or loosening of the yarn by the yarn contact guide 24.
[0035]
[Comparative Example 1]
Using the same yarn winding machine 9 as in Example 1, the diameter dimension (D) of the auxiliary bar 23 in the yarn path turning guide 16 is 6 mm, and the diameter dimension (d) of the yarn contact guide 24 is 3 mm. When the yarn was wound up under the same conditions as in Example 1 so that the length of the yarn contact portion in the yarn contact guide 24 was 6 mm, the tension by the yarn contact guide 24 was obtained. Was 3.8 CN, and a small amount of yarn slack occurred, but it was possible to perform the winding operation. However, this thread loosening rarely caused thread switching to fail. Further, the auxiliary bar 23 is bent and vibrated, and the tension fluctuation is increased, so that a package having a predetermined shape cannot be obtained.
[0036]
[Comparative Example 2]
In Comparative Example 1, the auxiliary bar 23 has a diameter (D) of 8 mm, and the yarn contact guide 24 has a diameter (d) of 4 mm. The length of the yarn contact portion in the yarn contact guide 24 is as follows. When the yarn was wound up under the same conditions as in Example 1 so as to be 8 mm, the auxiliary bar 23 was not bent or vibrated, but the tension by the yarn contact guide 24 was 2.5 CN. There was a lot of yarn slack, which could hinder winding and often failed to switch yarns.
[0037]
[Comparative Example 3]
In Comparative Example 1, the auxiliary bar 23 has a diameter (D) of 8 mm, and the yarn contact guide 24 has a diameter (d) of 4 mm. The length of the yarn contact portion in the yarn contact guide 24 is as follows. When the yarn was wound up under the same conditions as in Example 1 so as to be 15 mm, the auxiliary bar 23 did not bend or vibrate, but the tension by the yarn contact guide 24 became 2CN and the yarn slackened. The amount became so large that it was impossible to continue winding the yarn.
[0038]
4, road yarn as shown in Figure 5 turning guide 26, the use of yarn deflection guide 31, 33, 35, such as is the placing serial in FIGS. 6-8 of Examples 1 and 2 The result was similar to the case.
[0039]
The diameter dimensions of the auxiliary bars 23, 32, 34, 36 in the yarn path turning guides 16, 26, 31, 33, 35 and the like need to be 8 mm or more, the yarn contact guides 24, 29, the auxiliary bars 32, 34, The length of the yarn contact portion at 36 should be 6 mm or less, preferably 4 mm or less, and most preferably 2 mm or less. The minimum value of the length of the yarn contact portion is the length in a state where the yarn is in point contact with the circumferential surface guide portion.
[0040]
Then, the maximum range of the length of the yarn contact portion is 6 mm or less, the length of the yarn contact guide is at least one point contact with the peripheral surface guide portion, and the preferred range of the length of the yarn contact portion is 4 mm or less. The thread contact guide has a length that is not less than the length that makes point contact with the circumferential surface guide portion of the yarn contact guide, and the most preferable range of the length of the yarn contact portion is 2 mm or less. Therefore, it can be said that it is longer than the length of point contact.
[0041]
The yarn winding device of the present invention can be used in a false twisting machine, a spinning machine and the like for false twisting a drawn yarn.
[0042]
【The invention's effect】
The yarn winding device according to the present invention includes a traverse mechanism for traversing the yarn, a traversing fulcrum guide for determining the traversing fulcrum of the yarn, and a traversing portion of the yarn. In the winding device provided with a yarn path turning guide for changing the direction to the yarn path, the yarn path turning guide is constituted by an auxiliary bar and at least one yarn contact guide, and the yarn contact in the yarn traveling direction Since the length of the section is 6 mm or less, the yarn contact guide bends according to the magnitude of the tension variation even if the yarn tension varies, so that the tension variation is absorbed and the winding tension is reduced. It is stable, the frictional resistance at the time of winding is reduced, and a decrease in the yarn tension on the upstream side of the yarn path turning guide can be prevented, and the success rate of the yarn switching can be improved.
[0044]
[Brief description of the drawings]
FIG. 1 is a schematic view showing one embodiment of the configuration of a drawing false twisting machine provided with the yarn winding device of the present invention.
[0045]
FIG. 2 is a schematic view showing one embodiment of the configuration of the yarn winding device of the present invention.
[0046]
FIG. 3 is a schematic plan view of FIG. 2;
[0047]
FIG. 4 is a schematic view showing another embodiment of the configuration of the yarn winding device of the present invention.
[0048]
FIG. 5 is a schematic plan view of FIG. 4;
[0049]
FIG. 6 is a schematic cross-sectional view showing a third embodiment of the yarn path turning guide.
[0050]
FIG. 7 is a schematic cross-sectional view showing a fourth embodiment of the yarn path turning guide.
[0051]
FIG. 8 is a schematic cross-sectional view showing a fifth embodiment of a yarn path turning guide.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Machine frame 9 Winding device 11 Support member 12 Cradle 13 Shaft body 14 Traverse mechanism 15 Driving rollers 16, 26, 31, 33, 35 Thread path turning guides 17, 27 Bracket 18 Traverse fulcrum guide 19 Thread switching mechanism 20 Holder 21 Traverse guide 22 Guide 23, 28, 32, 34, 36 Auxiliary bar 24, 29 Guide for thread contact 25, 30 Holding member

Claims (1)

Winding with traverse mechanism for traversing the yarn, traversing fulcrum guide for determining the traversing fulcrum of the yarn, and yarn path turning guide for changing the direction of the yarn to the traversing portion In the apparatus, the yarn path turning guide includes an auxiliary bar and at least one yarn contact guide, and the length of the yarn contact portion in the yarn traveling direction is 6 mm or less. Take-off device.

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