JP2924835B2 - Package monitoring device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a package monitoring apparatus for detecting the presence or absence of an abnormality in a package using a light emitter and a light receiver.

[0002]

2. Description of the Related Art A yarn package is formed by, for example, an automatic winder as shown in FIG. The winding unit 1 of the automatic winder includes a guide 3 for guiding a yarn Y from a yarn supplying bobbin 2 provided at a lower portion, a tensor 4 for applying an appropriate tension to the yarn Y, and a slab for detecting a defect of the yarn Y. A catcher 5, a yarn joining device 6 for tying the yarn Y when the yarn is cut or cut by the slab catcher 5, and a drum 8 for rotating the package P supported by the cradle arm 7 by frictional contact are arranged in this order. . A groove 9 for traversing the yarn Y is formed on the outer peripheral surface of the drum 8, and a cover 10 for preventing the end surface from dropping is provided on the front side thereof. In addition, a suction mouth 11 and a suction pipe 12 for turning and guiding the yarn on the package side and the yarn on the yarn supplying bobbin side to the yarn joining device 6 during the yarn joining are provided.

[0003]

The package P
In the production process, the defect of the yarn Y itself is removed by the slab catcher 5 of the winding unit 1 and a defective portion appearing on the surface of the wound package P can be found by quality check at the time of shipping. If a defective portion is formed inside the package due to improper winding during molding, there is a problem that the defective package cannot be found unless the package is used in the next step and the package is unwound.

In order to solve this problem, the present applicant has provided an optical sensor so that detection light passes near a tangent line between the package and the drum in order to monitor the package during the winding process. It has already been proposed to detect the presence or absence of an abnormality in the package. When such a sensor is configured by an interrupt type optical sensor including a light emitting body and a light receiving body, the presence or absence of an abnormality is determined based on the amount of received light.
Since the detection light has passed near the drum almost parallel to the drum surface, the diffused detection light is reflected by the drum surface and detected by the photoreceptor, which may cause erroneous detection.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems and to provide a package monitoring device capable of accurately detecting an abnormal winding of a package.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to a light emitting element and a light receiving element that allow detection light to pass near a tangent line between a package and a drum that contacts the package and transmits rotation. And passing the detection light away from the drum toward the light receiving body.

The package is formed in a cone shape,
The light emitter is arranged on the small diameter side of the package.
May be.

[0008] The drum may be supported in a cantilever manner, and the luminous body may be arranged on a free end side of the drum.

[0009]

An embodiment of the present invention will be described below in detail with reference to the accompanying drawings.

FIGS. 1 to 3 show a case where the package monitoring apparatus of the present invention is applied to an automatic winder.
The automatic winder has a large number of winding units 1 shown in FIG. 6 arranged side by side. This monitoring device is provided with a yarn detection sensor 22 for detecting whether or not a yarn exists outside the regular outermost layer 21 of the package P in the winding and forming process of the package P for each winding unit 1.

The package P is obtained by winding a yarn Y around a winding tube B. The winding forming process refers to a process in which the yarn Y is wound around the winding tube B to grow the package P, and the yarn Y on the package P side is transferred to the yarn joining device 6 by the suction mouth 11 for splicing. The step of guiding and restarting winding after piecing is also included. The regular outermost layer 21 of the package P is defined by a center line about the axis C of the package P and a tangent line 25 (contact point in a sectional view) between the package P and the drum 8 (also referred to as a driving drum or a traverse drum). The outermost layer of the yarn layer defined by a circle having a radius. The package P may have a cone shape or a cheese shape. In the case of the cone-shaped package P, since the axis C of the package P is inclined in the axial direction with respect to the tangent 25 between the package P and the drum 8, the radius of the regular outermost layer 21 of the package P is naturally It differs in the axial direction of the package P.

The yarn detecting sensor 22 includes a light emitting device having a light emitting element (light emitting body 24) made of a semiconductor and a light receiving device having a light receiving element (light receiving body 23) facing the light emitting element. A tangential line 25 between the drum 8 for rotating the package P by frictional contact with the detection light L and the package P
Is passed along the tangent line 25 in the vicinity of. More specifically, the yarn detection sensor 22 is provided so that the detection light L passes near the regular outermost layer 21 of the package P and the drum 8 and at a position not in contact with the outermost layer 21 and the peripheral surface of the drum 8. . The reason why the yarn detection sensor 22 is provided so that the detection light L passes near the tangent line 25 is that the position of the detection light L with respect to the outermost layer 21 does not change even if the winding diameter of the package P increases. . Further, in the present monitoring device, the yarn detection sensor 22 is provided so that the detection light L passes through the side F on which the yarn Y is introduced into the package P (the front side of the winding unit). The reason for this is to detect double tapping and edge dropping as described later. Further, since the outermost layer portion of the package P at the position where the detection light L passes is just before contacting the drum, abnormal yarns due to scrambling and dust yarns caught in the package described later are normally regulated by centrifugal force due to the high-speed rotation of the package P. This is because it is more protruding from the outermost layer of the above, which is advantageous for detecting an abnormal yarn.

The package P is supported by the cradle arm (package support mechanism) 7 so that the position of the tangent line 25 is slightly retracted as the winding diameter increases. It is preferable that the package P is supported by the cradle arm 7 so as not to cause the problem.

The purpose of the package monitoring device of the present invention is to monitor the surface (outermost layer) 21 of the package P. In this sense, the detection light L is applied to the outermost layer 21 of the package P.
It is important that you are passing near. For this purpose, it is desirable that the detection light L from the light emitter 24 is substantially parallel to the tangent line 25.
In order to prevent the light from being reflected by the surface of the light-receiving body 23 and causing erroneous detection, as shown in FIG.
4 is arranged closer to the drum 8 than to the photoreceptor 23. That is, the yarn detection sensor 22 outputs the detection light L to the outermost layer 21.
Is formed so as to be in the sensing state (ON) when blocked by a foreign substance such as a thread outside the luminous body 24.
Although the detection light L is diffused even though it has directivity, the detection light L is reflected on the smooth surface of the metal drum 8 and enters the light receiving body 23 without being blocked by the foreign matter. Also does not enter the sensing state. Therefore, the detection light L from the light emitter 24 to the light receiver 23 is slightly inclined with respect to the surface (tangential line 25) of the drum 8 so that the detection light L is slightly away from the drum 8 as it goes toward the light receiver 23. Also,
The reason why the light-emitting body 24 is arranged closer to the drum 8 than the light-receiving body 23 is that the light-receiving body 23 requires a predetermined light-receiving area. If the light emitting body 24 is not hidden by the drum 8, a part of the main body of the light emitting body 24 may be hidden by the drum 8, so that the light emitting body 24 can easily approach the drum 8.

Usually, the yarn Y enters the traverse groove 9 of the drum 8 and is wound on the surface of the package P while being traversed. Therefore, even if the detection light L passes near the peripheral surface of the drum 8, the yarn Y is not detected by the yarn detection sensor 22.

The light-emitting body 24 and the light-receiving body 23 are provided so as to face each other in the vicinity of a tangent line.
8 are integrally connected. Specifically, an integral bracket 28 that extends across the drum 8 in the axial direction outside the cover 27 provided on the front side F of the drum 8 is attached to the main body frame 35 of the winding unit 1, and light is emitted on both sides of the bracket 28. The body 24 and the photoreceptor 23 are separately mounted. As shown in FIG. 1, the cover 27 is made of a plate having an arc-shaped cross section provided close to the peripheral surface of the drum 8 to prevent the end face from falling.
The bracket 28 is, as shown in FIG.
A connecting portion that straddles both ends of the drum 8 along the lower edge, a rising portion that is located at both ends of the drum 8 and rises along the curved surface of the cover 27, and a fixing portion for fixing the light emitter 24 and the light receiver 23. A pedestal portion, and the illuminant 24
After the light receiving body 23 is embedded and fixed and integrally connected, the bracket 28 is attached to the main body frame 35 of the winding unit 1 to simplify the attachment and eliminate the need for optical axis alignment after the attachment. It is.

The cradle arm 30 supporting the package P has a pivot center point on the rear side R of the winding unit 1, and the position of the tangent line 25 hardly changes even when the winding diameter increases, and the package near the tangent line 25 Since the position of the surface does not largely move, the yarn detection sensor 22 can always detect the presence or absence of a foreign substance under the same conditions even if the position is fixed. However, if the yarn detection sensor 22 excessively approaches the surface of the package P, it may be detected by the fluff of the outermost layer 21. Therefore, the yarn detection sensor 22 is separated from the surface by a predetermined minute distance.

The light-emitting body 24 and the light-receiving body 23 may be arranged at both ends of the drum in view of the straightness and symmetry of light. However, in the present embodiment, the light-emitting body 24 is mounted on the package P.
Are located on the smaller diameter side of This is an arrangement that is particularly advantageous for detecting end-face drop. That is, the end face is easily dropped on the small diameter side of the package P, and the sensitivity of the yarn to the yarn at the position close to the light emitting body 24 is higher than that at the far position because the light flux of the detection light L from the light emitting body 24 is gradually diffused. The luminous body 24 is disposed on the small diameter side of the package P by utilizing the property that the height is high.

Also, in the present embodiment, the light emitting body 24
Are arranged on the free end side of the drum 8. That is, the drum 8
Are fixed to the main body frame 35 of the winding unit 1 in a cantilever state, the light receiving body 23 is arranged on the fixed end side, and the light emitting body 24 is arranged on the opposite free end side.
This is because, in the arrangement in which the light emitter 24 is brought close to the drum 8 as described above, the main body frame 35 becomes an obstacle on the fixed end side to allow a part of the main body of the light emitter 24 to be hidden by the drum 8. . In this regard, since there is no member that interferes with the free end side, the arrangement of the light emitters 24 is free, and mounting is simplified. Note that the fixed end side of the drum 8 is the large diameter side,
If the free end side has a small diameter, the free end side of the drum 8 can necessarily be arranged on the small diameter side of the package P and on the free end side of the drum 8.

The yarn detecting sensor 22 is a slab catcher 5
(See FIG. 6), and upon detecting foreign matter, immediately cut the thread Y with a cutter attached to the slab catcher 5 or a cutter provided separately, and a cradle arm as shown by an arrow a in FIG. 30 is started to separate the package P from the drum 8, and a brake is applied to stop the rotation of the package P. At the same time, the alarm of winding unit 1 (lamp 3
1) is issued, the operator is called, and the recovery work is immediately started. Therefore, by operating the yarn detection sensor 22 from the start of winding (drum start) to the time of splicing, the package P can be monitored at all times during the entire winding process, and surface irregularities and the like can be monitored. As soon as it is found, winding can be interrupted. That is, for example, when a phenomenon (referred to as scrambling) occurs in which the annular yarn bundle shifts from the large-diameter side to the small-diameter side of the cone-shaped package P due to, for example, a low frictional resistance of the yarn Y, Is in a state of floating above the surface of the package P, the detection light L of the light emitting body 24 is blocked by the yarn bundle, and this can be immediately detected. In addition, it is also possible to instantaneously detect a broken thread in which the thread broken due to a variation in tension is wound around the surface of the package P again, or a floating thread in which the thread floats from the outermost layer 21 of the package due to the contact pressure and the tension.

Further, since the yarn detecting sensor 22 is provided on the front side F of the winding unit 1, it is possible to detect a winding failure caused by double reeling at the time of yarn splicing.
As shown in FIG. 4 (a), in the double exit, the yarn end catching means (suction mouth) 11 is used for the package P during splicing.
Is to pull out two yarns (the regular yarn Y and the yarn portion 33 already wound on the package P) from
When the two yarns are supplied to the yarn splicing device 6 as they are, the yarn splicing device 6 determines that there is an ejection error and splices (restarts winding).
Is not done. However, when only one of them is supplied to the yarn splicing device 6 even when the double spouting is performed, the yarn splicing device 6 performs a normal yarn splicing operation, and when the winding is restarted,
The other thread portion 33 pulled out is caught in the package P and becomes a defective product. At this time, the thread portion 33 that is wound in goes from the front side F of the winding unit to the surface of the package P as shown in FIG. 4B, so that it can be immediately detected by the thread detection sensor 22.

Also, if the end face drops due to some cause and the suction mouth 11 spouts out the end face dropped thread 34 together with the regular thread Y at the time of yarn splicing as shown in FIG. Like the picking, the yarn detection sensor 22 can detect the yarn 34 having the end face dropped.

Further, at the time of resuming the winding, the thread waste may be wound in along with the traveling yarn Y. However, since the yarn detection sensor 22 immediately detects this yarn waste, the yarn waste is prevented from being mixed into the package P. be able to. At the time of the yarn splicing, the yarn detection sensor 22 is operated only when the winding is restarted (immediately after the yarn splicing). That is, by not detecting when the suction mouse 11 is performing the yarn picking-up operation, the yarn detection sensor 22 detects the tip of the suction mouse 11 or the yarn Y normally pulled out of the package P by the suction mouse 11. Such malfunction can be prevented beforehand.

As described above, the monitoring means of the present invention can prevent a defect inside the package which can be found only in a conventional post-process by reliably detecting a phenomenon which causes the defect inside the package. By eliminating the yarn defect and using it together with the surface inspection after winding, it is possible to completely eliminate the occurrence of defective products in the package production process. That is, the quality of the package P is improved.

The detection light L of the yarn detection sensor 22 may be laser light, but in consideration of cost, the detection light L is light other than laser light, for example, infrared light or the like. It is preferable to use a semiconductor element such as that described above, and the present invention is configured to prevent such normal light from being diffused and reflected on the drum surface.

[0026]

The present invention exhibits the following excellent effects.

Since the detection light emitted from the light emitting body is made to pass away from the drum as it goes toward the light receiving body, there is no danger that the diffused detection light will be reflected on the drum surface and enter the light receiving body, thereby causing erroneous detection. Is prevented.
In addition, since the light emitter is arranged on the small diameter side of the cone-shaped package in which the occurrence rate of abnormal yarn is high, the generated abnormal yarn can be reliably detected. Further, since the light emitter is disposed on the free end side of the drum, the light emitter can be easily mounted.

[Brief description of the drawings]

FIG. 1 is a perspective view of a winding unit (part) showing an embodiment of the present invention.

FIG. 2 is a side view of the winding unit of FIG.

FIG. 3 is a front view of the winding unit of FIG. 1;

FIG. 4 is a side view of the winding unit of FIG. 1 at the time of double opening.

FIG. 5 is a side view of the winding unit of FIG. 1 when the end surface is dropped.

FIG. 6 is a front view of the winding unit (entire).

[Explanation of symbols]

 8 Drum 23 Light receiver 24 Light emitter 25 Tangent P Package

Claims (3)

(57) [Claims] 1. A light-emitting body and a light-receiving body are provided so that detection light passes near a tangent line between a package and a drum that contacts the package and transmits rotation. The light-emitting body and the light-receiving body move away from the drum toward the light-receiving body. A package monitoring device characterized by passing through. 2. The package monitoring device according to claim 1, wherein said package is formed in a cone shape, and said luminous body is arranged on a small diameter side of said package. 3. The package monitoring device according to claim 1, wherein the drum is supported in a cantilever manner, and the illuminant is disposed on a free end side of the drum.