JPH10152266A - Yarn monitor for spun yarn winder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify a device and prevent an increase in bent parts of yarn and a lowering of yarn quality by providing a sensor for detecting the fluctuation of traverse fulcrum guides caused by the traverse motion of yarn. SOLUTION: In cape of filament yarn 1 being in normal traverse motion without yarn breakage by a traverse motion 6, electric signals showing regular fluctuation are generated in a constant cycle, but when any one of filament yarn 1 inserted through traverse fulcrum guides 5 disposed at specified spaces along the longitudinal direction of a fixed frame is cut, a constant electric signal is generated from the traverse fulcrum guide 5 with the filament yarn 1 cut, that is, fluctuation is no longer detected. When a quality monitor 11 judges that fluctuation is not detected for the specified time, all the filament yarn 1 is cut to stop winding by a command from a control device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a yarn monitoring device for a yarn winding machine for detecting a yarn breakage or the like of a yarn winding machine for winding a melt spun yarn.

[0002]

2. Description of the Related Art Conventionally, a spinning spool which detects a yarn break by an optical sensor arranged to scan the yarn, or detects a yarn break by bringing a yarn break detection lever into contact with the yarn. Yarn monitoring devices for take-up machines are known.

[0003]

In the above-described yarn monitoring device of the conventional take-up winder, separate members such as an optical sensor and a detection lever must be provided in order to detect a yarn breakage. However, there is a problem that the structure of the spinning winder is complicated. In addition, the detection lever method has a problem that the bent portion of the yarn increases and the quality of the yarn deteriorates.
Further, the photoelectric sensor method does not increase the bending portion of the yarn, but has a problem that the lens is fogged by an oil agent or the like, thereby causing a malfunction.

[0004] An object of the present invention is to solve the above-mentioned problems of the conventional yarn monitoring device of the take-up winder,
An object of the present invention is to provide a yarn monitoring device of a spinning winder capable of monitoring the quality of a package or a yarn.

[0005]

According to the present invention, in order to achieve the above-mentioned object, firstly, a sensor for detecting a change in a traverse fulcrum guide caused by a traverse movement of a yarn is provided. Second, a metal plate is attached to the support member, a rod member is attached so as to be orthogonal to the metal plate, and a snail guide member serving as a traverse fulcrum guide is attached via the rod member, A sensor is formed by disposing a strain sensitive resistor on the metal plate. Thirdly, a quality monitoring device for monitoring a fluctuation of the traverse fulcrum guide is provided.

[0006]

FIG. 1 is a perspective view of a yarn winding machine as an example to which the yarn monitoring device of the yarn winding machine of the present invention is applied, and FIG. 1 is a plan view of the yarn monitoring device of the yarn winding machine of the present invention. An embodiment of the present invention will be described with reference to FIG. 2 which is a diagram. However, the present invention is not limited to the embodiment unless it exceeds the gist of the present invention.

A large number of filament yarns 1 spun by a melt spinning device (not shown) pass through a pair of godet rollers 2 and 3 and a plurality of traverse fulcrum guides 5 attached to a fixed frame 4 as a snail guide. Each of the members is divided and inserted one by one, and then wound as a package 7 on a bobbin provided on a plurality of bobbins by a spinning winder 6. A traverse device 6a for traversing the filament yarn 1 that has passed through the traverse fulcrum guide 5 is provided at 6a in the figure.

The fixed frame 4 is provided with a sensor 10 for detecting a fluctuation of the traverse fulcrum guide 5 for each traverse fulcrum guide 5. The sensor 10 will be described below.

A plurality of support bars 5a (support members) are attached to the fixed frame 4 perpendicularly to the longitudinal direction of the fixed frame 4, and a tip of the support bar 5a is attached to the tip of the support bar 5a. An enameled metal plate (metal core substrate) 5b so as to be orthogonal to the axis
One end is attached. From the other end of the metal plate 5b, a screw hole 5 is formed at the tip so as to be orthogonal to the metal plate 5b.
A rod member 5c in which c 'is bored is attached. 5d
Is a shaft portion having a screw 5d 'attached to one end thereof.
A snail guide member 5e as a traverse fulcrum guide is attached to the end of the shaft portion 5d opposite to d '. By screwing a screw 5d 'protruding from the shaft portion 5d into a screw hole 5c' of the rod member 5c, the snail guide member 5e is attached to the rod member 5c. Then, one filament thread 1 is inserted through the ring portion 5e 'of the snare guide 5e. Note that the filament yarn 1 is composed of many filaments. Reference numeral 8 denotes a strain gauge (strain-sensitive resistor) attached to the metal plate 5b. It is configured to detect expansion and contraction deformation of the metal plate 5b as an electric signal by the strain gauge 8.

The metal plate 5b, the strain gauge 8 and the like are covered with a casing 9 for protection from oils and the like. The casing 9 is provided with a hole 9a, and the tip of the rod member 5c projects outside from the hole 9a. The protrusion around the hole 9a serves as a stopper for preventing the strain gauge 8 from being excessively bent and broken.

The filament yarn 1 inserted through the ring portion 5e 'of the snail guide 5e is moved by the traverse device 6a.
When the metal plate 5b is traversed in a direction perpendicular to the rod member 5c and the snail guide 5e, the metal plate 5b is deformed with the tip of the support rod 5a as a fulcrum, and an electric signal corresponding to the deformation is generated by the strain gauge 8. Occur. In FIG. 1, the case of the filament yarn 1 at the right end will be described as an example. The filament yarn 1 is always in the ring portion 5 of the snail guide 5e.
It is traversed while being pressed against the left side of e '. now,
In FIG. 2, the filament yarn 1 moves in the left direction (arrow Y
When the filament yarn 1 is traversed in a), the filament yarn 1 is pressed against the left side of the ring portion 5e 'of the snail guide 5e.
As a result, the metal plate 5b is largely bent with the tip of the support rod 5a as a fulcrum via the rod member 5c and the snare guide 5e, and an electric signal indicating a large voltage value or current value is generated from the strain gauge 8. On the other hand, filament yarn 1
However, when the filament yarn 1 is traversed in the right direction (arrow Yb) in FIG. 2, the force of the filament yarn 1 pressing the left side of the ring portion 5e 'of the snail guide 5e is weakened, and the deformation of the metal plate 5b is reduced. Therefore, an electric signal indicating a voltage value or a current value is generated from the strain gauge 8.

As described above, when the filament yarn 1 is traversed in a normal state by the traversing device 6 without yarn breakage, an electric signal showing regular fluctuation is generated at a constant cycle. Will be. However, if any of the filament yarns 1 inserted through the traversing fulcrum guides 5 arranged at predetermined intervals along the longitudinal direction of the fixed frame 4 breaks, the traverse From the fulcrum guide 5, a constant electric signal is generated. That is, the fluctuation is not detected. If the quality monitoring device 11 determines that the fluctuation is not detected for a certain period of time, all the filament yarns 1 are controlled by a command from a control device (not shown).
And stop winding.

If some of the filaments constituting the filament yarn 1 inserted into one traversing fulcrum guide 5 are broken, the tension of the filament yarn 1 decreases, and therefore, at a constant period. It fluctuates, but the width of the fluctuation is small. When such a change from the normal state of the electric signal is detected, the quality monitoring device 11 determines that the filament has been cut, and in accordance with a command from the control device, all the filament yarns 1 are cut and the winding is stopped.

Further, if the electric signal fluctuates irregularly or the range of the fluctuation fluctuates greatly, it means that some abnormality has occurred. Stop winding.

Note that the quality monitoring device 11
The electrical signal detected from the strain gauge 8 is constantly monitored. The quality of the package can be monitored, and the quality of the package can be evaluated.

As described above, the sensor 10 such as the strain gauge 8 for detecting the fluctuation of the traversing fulcrum guide 5 due to the traversing movement of the filament yarn 1 is provided without providing a separate member. Since the machine is simplified and the bending portion of the yarn does not increase, it is possible to prevent a decrease in the yarn quality. Moreover, with oils and white powder,
There is no problem of malfunction.

A metal plate 5b is attached to the support rod 5a, a rod member 5c is attached so as to be orthogonal to the metal plate 5b, a snail guide member 5e is attached via the rod member 5c, and the metal plate 5b is distorted. The arrangement of the gauge 8 and the construction of the sensor 10 enable the sensor 10 to detect a slight change in the traverse fulcrum guide 5, specifically, a small change in the tension of the filament yarn 1. It is also possible to detect a case where some of the filaments constituting the filament yarn 1 inserted into one traverse fulcrum guide 5 are broken.

The quality of the traverse fulcrum guide 5 is monitored by the quality monitoring device 11 so that the package 7
Shape and quality can be evaluated.

[0019]

Since the present invention is configured as described above, the following effects can be obtained.

Since a separate member such as a yarn monitoring device of a conventional spinning winder is not provided, the spinning winder is simplified, and the bent portion of the yarn does not increase, so that the yarn quality is improved. Can be prevented from decreasing. In addition, there is no risk of malfunction due to oil or the like.

[0021] It is possible to detect a slight change in the tension of the filament yarn, and thus it is possible to detect a case where the filament constituting the filament yarn inserted into one traverse fulcrum guide is broken.

The shape and quality of the package can be evaluated.

[Brief description of the drawings]

FIG. 1 is a perspective view of a spinning winder as an example to which a yarn monitoring device of the spinning winder of the present invention is applied.

FIG. 2 is a plan view of a yarn monitoring device of the spinning winder according to the present invention.

[Explanation of symbols]

 1 ··· Filament thread 5 ··· Twill swing fulcrum guide 5b ··· Metal plate 5e ··· Snell guide 8 ··· Strain gauge

Claims (3)

[Claims] 1. A yarn monitoring device for a take-up winder, comprising a sensor for detecting a change in a traversing fulcrum guide caused by a traversing motion of a yarn. 2. A metal plate is attached to a support member, a rod member is attached so as to be orthogonal to the metal plate, and a snail guide member serving as a traverse fulcrum guide is attached via the rod member. The yarn monitoring device according to claim 1, wherein a strain sensitive resistor is disposed on the metal plate to form a sensor. 3. A quality monitoring device for monitoring a fluctuation of a traverse fulcrum guide.
3. The yarn monitoring device of a yarn winding machine according to claim 1.