JP2000016702A - Detecting device for winding of yarn on roller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accurately detect the winding of a yarn on a roller, by providing roughened and mirror-finished surfaces divided in an axial direction on a roller surface abutting a package, also determining an irradiation axis of an optical sensor so as to be directed toward the mirror surface work part. SOLUTION: A part corresponding to each bobbin length L of a touch roller 16 is divided into a first mirror-finished surface 41, a first roughened surface 42, a second mirror-finished surface 43, and a second roughened surface 44. A distance sensor 21 is arranged by directing an irradiation axis 21a toward a mirror-finished surfaces 43a, 41b in a traverse width of a touch roller 16. A yarn traverses in a ring-shaped point of prescribed position W1 by generating a twilled winding in a traverse width W when the yarn is wound on the touch roller 16 by mistake, here light from the irradiation axis 21a is irregularly reflected. The distance sensor 21, detecting this irregular reflection 21c, detects the presence of an irregular reflection object. In this way, the winding of the yarn on the touch roller 16 can be detected from an early stage.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for detecting a yarn erroneously wound around a roller rotating in contact with a package in a yarn winding section, and more particularly to a rough surface processing for preventing the yarn from being wound around the roller. The present invention relates to a device for detecting a thread winding of a roller that can detect even when the application is performed.

[0002]

2. Description of the Related Art Textile machines such as a draw false twister and a take-up winder take up a yarn on a bobbin or a paper tube to form a package.
A full winding package is removed and replaced with an empty bobbin or paper tube to provide a yarn winding section that enables continuous winding.

[0003] In particular, the spinning winder is entirely configured as a yarn winding section. As a typical spinning winder, there is a turret type spinning winder in which a continuously supplied yarn is wound by two spindles. In this turret type take-up winder, two rotatable spindles (also referred to as bobbin holders) are arranged on both sides of the turret rotation center on both sides of a rotatable turret, and each spindle can be driven independently. A plurality of bobbins are inserted into each of the spindles, and one of the two spindles is disposed at a winding position substantially vertically above and the other at a standby position substantially vertically below the winding position. And the turret is rotated by 180 degrees each time the bobbin becomes a full package, and the full bobbin package is wound on the empty bobbin of the spindle newly positioned at the winding position. A new winding is started by performing a yarn transfer that hooks the yarn leading to the reel.

The package or bobbin inserted into the spindle at the winding position rotates in contact with the auxiliary driven touch roller. Further, the yarn wound by the spinning winder may be an unprocessed yarn immediately after spinning and may be a sticky yarn, and the yarn is likely to be stuck on the surface of the touch roller. Therefore, in order to make it difficult for the thread to be wound around the touch roller, a roughened portion such as a satin finish is applied to a portion of the touch roller surface where the package contacts.

[0005]

However, even if the touch roller is roughened, the thread may be erroneously wound around the touch roller at the time of thread transfer or the like.
When the yarn is wound around the roller, the traverse device traverses the roller to the roller, and the yarn is fed in steadily. Therefore, a state similar to the case where the traversing is normally performed on the winding package occurs. Therefore, erroneous winding of the yarn around the roller cannot be detected only by monitoring the presence or absence of running of the yarn. If the winding of the yarn around the roller is left unattended, the yarn of the roller becomes thick and thick, causing serious mechanical damage to the winding portion of the yarn.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and is capable of accurately detecting winding of a thread around a roller to be subjected to roughening, and furthermore, a roller. It is an object of the present invention to provide a yarn winding detection device for a roller which can detect a yarn winding at an initial stage.

[0007]

According to a first aspect of the present invention, there is provided an image forming apparatus comprising: a roller rotating in contact with a package; and an optical sensor disposed toward the roller. On the roller surface in contact with the package, a roughened portion and a mirrored portion are provided separately in the axial direction, and the optical sensor is characterized in that an irradiation axis of light is determined toward the mirrored portion. This is a yarn winding detection device for a roller. When the roller surface in contact with the package is axially divided into a roughened portion and a mirror-finished portion, it is possible to detect winding yarn at the mirror-finished portion while preventing winding of the yarn at the roughened portion. When the yarn is erroneously wound, an identifiable irregularly reflected light is generated from the yarn located in the mirror-finished portion, and it can be detected that the yarn is wound around the roller.

According to a second aspect of the present invention, there is provided the yarn winding detecting device for a roller according to the first aspect, wherein an irradiation axis of the light of the distance sensor passes through a position offset by a predetermined distance from the center axis. This makes it possible to set the offset amount appropriately, avoid the reflected light from the mirror-finished portion, and selectively and efficiently receive the irregularly-reflected light from the yarn erroneously wound on the mirror-finished portion. Note that it is desirable to use visible light such as red as the light of the distance sensor so that the direction of the irradiation axis of the distance sensor can be easily adjusted.

According to a third aspect of the present invention, there is provided the yarn winding detecting device for a roller according to the first aspect, wherein the light irradiation axis of the sensor is inclined with respect to a center axis of the roller. This allows
By appropriately adjusting the amount of inclination, reflected light from the mirror-finished portion can be avoided, and irregularly reflected light from a yarn erroneously wound on the mirror-finished portion can be selectively and efficiently received.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view of a main part of a spinning winder to which a yarn winding detection device of the present invention is applied, and FIG. 2 is a spinning winder to which a yarn winding detection device of the present invention is applied. FIG. 3 is a view showing a thread winding detection device in particular.

The main parts of the take-up winder shown in FIG. 1 are a blade type traverse device 18, a touch roller 16, a package P
2 and 3 that support
And, is provided.

The traverse device 18 alternately applies yarns to the rotating blades 18a and 18b rotating in opposite directions, and traverses the yarn Y that reaches the package P via the surface of the touch roller 16, and moves up and down. It is attached to a free slide box 15.

The touch roller 16 includes a traverse device 18
Along with the bobbin or package inserted in the spindles 2 and 3 which are supported by the slide box 15 and are driven positively, a structure is adopted.

FIG. 2A shows the structure of the touch roller 16 in the axial direction. The touch roller 16 has an overall length corresponding to the product of the number of bobbins inserted into the spindles 2 and 3 (not shown) and the length L of each bobbin. The portion corresponding to each bobbin length L is divided into a first mirror-finished portion 41, a first roughened portion 42, a second mirror-finished portion 43, and a second roughened portion 44. The traverse width W for winding the package around each bobbin has a first roughened portion 41 on both sides of the first roughened portion 42 and a second mirrored portion 41 on both sides.
A part of the mirror-finished portion 43 is formed so as to overlap. The second roughened portion 44 is a portion where the yarn temporarily contacts when the yarn is hooked on the bobbin. The end 41a of the first mirror-finished portion 41 is a large-diameter portion for causing a one-sided contact at the initial stage of winding the bobbin.

The first and second roughened portions 42 and 44 are portions whose surfaces have been subjected to uneven processing such as satin finish in order to make it difficult for the yarn to be wound. The first and second mirror-finished portions 41 and 43 are portions that have been polished in order to easily transmit the driving force of the spindles 2 and 3 on which the winding package P is inserted. The traverse width W
The center part and the end 41a can be mirror-finished parts, and the other parts can be roughened parts.

The spindles 2 and 3 shown in FIG. 1 hold empty bobbins and packages, and are located at positions where the packages P are brought into rolling contact with the touch rollers. As the package P becomes thicker, the slide box 15 moves up, or the spindles 2 and 3 move down with the rotation of the turret plate described later.

In FIG. 2A, the yarn winding detecting device 20
The distance sensor 21 is arranged such that the irradiation shaft 21a is directed toward the mirror-finished portions 43a and 41b within the traverse width of the touch roller 16, and the thread winding of the touch roller 16 is performed based on a detection signal from the distance sensor 20. And a determination unit 40 for determining the presence or absence. The distance sensor 21 is provided for each bobbin, and the touch roller 13 of the slide box 15 is provided.
They are collectively stored in a container-shaped dark room 26 fixed to the back surface. On the touch roller 16 side of the dark room 26, there is provided a window 26a for emitting irradiation light and receiving irregularly reflected light from the yarn. The window 26a is covered with transparent glass.
For this reason, the lens of the distance sensor 21 does not become dirty with oil or the like, and the cleaning becomes easy. The distance sensor 21 is an optical sensor, and its irradiation axis 21a is
6 at a right angle toward the central axis 16a,
As shown in FIG. 2B, the user is heading toward a position offset from the central axis 16a by a distance ε. As a result, the irradiation axis 21a
Is inclined by a predetermined angle θ with respect to a line connecting the central axis 16a and the roller surface.

As shown by a two-dot chain line in FIG. 2B, the irradiation axis of the distance sensor 21 is
2a, the irradiation axis may be inclined at an angle α with respect to a line perpendicular to the central axis 16a, as indicated by a two-dot chain line in FIG. In this case, the irradiation axis of the distance sensor 21 is configured to be inclined with respect to the roller center axis 16a,
The same operation can be achieved as to direct the irradiation axis through a position offset by a predetermined distance from the central axis of the roller.

Distance sensor 21 selected as optical sensor
The structure and principle of detection will be described with reference to FIG. Distance sensor 2
Reference numeral 1 denotes a light projecting element 22 such as an LED, a light receiving element array 23 including two or more light receiving elements such as a PSD, and light from the light projecting element 22 focused on a predetermined position on the surface of the touch roller 12 and projected. It comprises a light projecting lens 24 that emits light, and a light receiving lens 25 that can move the irregularly reflected light from the thread on the light receiving element array 23 according to the distances L1 to L2 to the surface of the touch roller 12 to determine the focus. . The illustrated example shows a case where light is irradiated perpendicularly to the surface of the touch roller 12 to clearly show the principle of distance detection.

When the distance from the distance sensor 21 to the surface of the touch roller 16 is L1, the focus is at A1 from the lower end of the light receiving element array 23, and the light receiving element array 23 is in focus.
Can identify the position of A1. When the distance from the distance sensor 21 to the surface of the touch roller 16 is L2,
Focusing is made at a position A2 from the lower end of the light receiving element array 23, and the light receiving element array 23 can identify the position of A2. Note that a two-part photodiode is used for the light receiving element row 23,
A type that detects switching between the distance L1 and the distance L2 by changing the photodiode that is sensed at the distance L1 and the distance L2 can also be used.

The distance sensor 21 is configured to be able to detect the absolute value of the distance by a triangulation method instead of the magnitude of the amount of received light. Therefore, it is hardly affected by dirt on the lenses 24 and 25 and the difference in the surface properties of the touch roller 16, and stable distance measurement can be performed. In the present invention, instead of using the distance sensor for measuring a specific distance, an object is located at a known distance with the best sensitivity by utilizing the characteristic of focusing on a predetermined position of the light receiving element array 23 by a predetermined distance. Used to detect whether or not there is. Therefore, a two-segment photodiode is sufficient for the light receiving element array 23, and in some cases, even one light receiving element can be used. However,
Since a distance sensor capable of detecting the absolute value of the distance exists as a standard sensor, it is advantageous to use a distance sensor having two or more light receiving elements for detecting whether or not an object exists at a certain distance. The distance sensor 20 is a reflection-type sensor in which the detection area is limited to a range of a predetermined distance from the sensor 20. Since the detection area is limited, the detection accuracy in the detection area is good, and the distance of one thread is sufficient. Differences in thickness distance can also be identified.

Next, the operation of the distance sensor 21 arranged toward the touch roller 16 will be described with reference to FIG. The irradiation axis 21a of the distance sensor 21 is inclined at a predetermined angle θ with respect to an axis 16b perpendicular to the center axis 16a of the touch roller 16. Therefore, light along the irradiation axis 21a is reflected by the stable mirror-finished portion of the touch roller 16, becomes reflected light 21b, and is not received by the distance sensor 21. Therefore, the distance sensor 21 determines that there is no object at the set distance L1.

If the yarn is wound around the touch roller 16 by mistake, the twill winding is performed with the traverse width W as shown in the figure.
Since the touch roller 16 is rotating in the direction of arrow C,
At the point,..., At the ring-shaped predetermined position W1 of the touch roller 16, the thread crosses. Then, the light from the irradiation axis 21a is irregularly reflected by the yarns of the points. The distance sensor 2 that focuses on the distance L1 even if the light reflected irregularly is slight.
1 detects the irregularly reflected light 21c from the yarn and detects that there is an irregularly reflected object at the distance L1. Thereby, the winding of the thread around the touch roller 16 can be detected from an early stage.

In FIG. 2, visible light such as red is selected as the irradiation light 21a from the distance sensor 21. Then
Adjustment to separate the touch roller 16 by a predetermined distance L1 toward a predetermined position W1 having a narrow width can be easily performed while checking the irradiation axis 21a. Further, since the adjustment of inclining from the axis 16b perpendicular to the center axis 16a by the predetermined angle θ is determined by the offset amount ε from the center axis 16a, the simple operation of setting the dark chamber 26 to a predetermined position allows the spinning winder to be adjusted. Can be adjusted for the whole. This predetermined angle θ is desirably small enough not to receive the reflected light from the surface of the touch roller 16. This is because the smaller the predetermined angle θ, the more irregularly reflected light 21c from the yarn can be received. The distance sensor 21 is a dark room 26 (see FIG. 1).
And shields as much as possible light other than light from the irradiation shaft 21a and light irregularly reflected from the yarn. Therefore, the error movement of the distance sensor 21 is small.

Next, an outline of the structure of a yarn winding machine to which the above-described device for detecting yarn winding around a roller and a winding operation will be described with reference to FIGS. FIG. 4 is a side view of the spinning winder, and FIG. 5 is a front view of the spinning winder.

The take-up winder 1 includes two parallel spindles 2 and 3 for inserting and inserting a large number of bobbins (paper tubes) into a turret 6.
These are located at point symmetrical positions with respect to the rotation center 26, and these are driven at high speed by the spindle motors 4 and 5, respectively. The turret 6 and the bearing cylinder 7 are rotatably held on a shaft 9 fixed to a machine body 8. A turret motor (M1) 13 is connected to the bearing cylinder 7 via sprockets 10, 11 and a chain 12. Then, the turret motor (M1) 13
By controlling the number of rotations, the positions of the two spindles 2 and 3 protruding from the turret 6 can be set to predetermined positions.

The guide bar 14 extends parallel to the side of the machine body 8.
The slide box 15 is provided so as to be able to move up and down along the guide bar 14. The slide box 15 is supported by a contact pressure cylinder 17 provided between the slide box 15 and the machine body 8. By controlling the air pressure to the contact pressure cylinder 17, the slide box 15 is raised, or a state in which the movement following the package P is possible while securing a predetermined contact pressure to the package P by the touch roller 16 is enabled. be able to. Also, this slide box 1
5 is provided with a traverse device 18 for traversing the yarn Y and a touch roller 16 with which the yarn Y from the traverse device 18 contacts.

The spindle motor (M2) 4 and the spindle motor (M3) 5 for driving the spindle 2 and the spindle 3 have a rotation speed of the pulse generator PG.
1, PG2, and is controlled so as to reach a predetermined rotation speed. In particular, the number of rotations of the spindle 2, which needs to be reduced as the package is wound and the package diameter increases, is controlled so that the yarn speed obtained from the pulse generator PG1 of the touch roller 16 is kept constant. Have been. Further, the turret motor (M1) 13 is driven based on an encoder or the like attached to a portion that rotates in synchronization with the rotation of the turret 6, and the turret 6 rotates to a predetermined angle with respect to the rotation center 26 to rotate to a predetermined angle. Position.

As the position of such a turret 6, the spindle 2 in the winding state is set at a predetermined stop position (first position) A, and the spindle 2 in the winding state is set at a predetermined standby position (second position). C. The first position A and the second position C can be switched by rotating the turret by 180 °.

FIG. 5A shows that the package P, which has been fully wound at the first position A, is rotated by 180 ° of the turret so that the package P, which has been fully wound, is located at the second position C. 3 shows a state where an empty bobbin is positioned. The yarn to be traversed by the traverse device 18 reaches the full winding package P via the touch roller 16 and the surface of the empty bobbin.

FIG. 5B shows a state in which the yarn from the traverse device 18 is removed, the yarn is further moved by the yarn transfer device 31 to the end of the empty bobbin, and the yarn is transferred to the empty bobbin. In the illustrated example, the yarn is transferred to an empty bobbin by so-called reverse take-off. If the yarn transfer fails, the yarn may be wound around the surface of the touch roller 16, and this abnormal winding state is quickly and quickly detected by the yarn winding detection device for the roller provided with the distance sensor 21 and the determination unit 40 described above. It is reliably detected. When the yarn winding is detected, a command signal is output from the determination unit 40, and the yarn cutting mechanism provided upstream of the yarn winding machine operates to cut the yarn supplied to the yarn winding machine,
Stop the spindles 2 and 3 and send an alarm.

In the above-described embodiment, the case where the yarn winding detection device is applied to a spindle type yarn winding machine has been described. However, the package inserted into the bobbin holder is rotated by the friction roller and driven. It can also be applied to a friction type spinning winder. Further, the yarn winding detection device can be applied not only to the yarn winding machine but also to other yarn processing machines that apply a rough surface processing for making it difficult to wind the yarn to the traverse width of the roller surface.

[0033]

As described above, according to the first aspect of the present invention, the winding of the roller yarn is directly detected by the optical sensor, so that the winding of the yarn around the roller can be reliably detected at an early stage of the winding. As a result, the wound yarn can be quickly removed from the roller. In addition, by performing roughening on a large part of the traverse width of the roller, it is possible to make it difficult for the yarn to wind around the roller itself. In addition, since the light from the optical sensor is applied to the mirror-finished portion of the roller, the light is not reflected on the roller surface, and the winding of the yarn can be accurately detected.

According to the second aspect of the present invention, since the irradiation axis is determined so as to pass through a position offset by a predetermined distance from the center axis of the roller, light reflected from the mirror-finished portion of the roller is avoided, and the mirror-finish processing of the roller is performed. It is possible to selectively and efficiently receive diffusely reflected light due to a yarn erroneously wound on a portion.

According to the third aspect of the present invention, since the light irradiation axis of the sensor is inclined with respect to the center axis of the roller, reflected light from the mirror-finished portion of the roller is avoided, and the mirror-finish of the roller is performed. It is possible to selectively and efficiently receive diffusely reflected light due to a yarn erroneously wound on a portion.

[Brief description of the drawings]

FIG. 1 is a side view of a main part of a spinning winder to which a yarn winding detection device for a roller according to the present invention is applied.

FIG. 2 is a diagram showing a yarn winding detecting device of a spinning winder to which the yarn winding detecting device for a roller of the present invention is applied.

FIG. 3 is a diagram illustrating a measurement principle of a distance sensor.

FIG. 4 is a side view of the spinning winder.

FIG. 5 is a front view of the spinning winder.

[Explanation of symbols]

 Reference Signs List 16 touch roller (roller) 16a central axis 16b axis 20 thread winding detecting device 21 distance sensor (optical sensor) 21a irradiation axis 22 light emitting element 23 light receiving element array 24 light emitting lens 25 light receiving lens P package W1 predetermined position L1 predetermined distance θ Predetermined angle α Predetermined angle

Claims (3)

[Claims] A roller that rotates in contact with the package;
An optical sensor disposed toward the roller, and provided on the surface of the roller contacting the package, a roughened portion and a mirror-finished portion are separately provided in an axial direction, and the optical sensor is A yarn winding detection device for a roller, wherein an irradiation axis of light is determined toward a mirror-finished portion. 2. The apparatus according to claim 1, wherein an irradiation axis of the light from the optical sensor passes through a position offset by a predetermined distance from a center axis of the roller. 3. The apparatus according to claim 1, wherein a light irradiation axis of the optical sensor is inclined with respect to a center axis of the roller.