JPH06115820A - Remaining thread detecting method - Google Patents

Abstract

PURPOSE:To surely detect existence of remaining thread wound on a bobbin color coded at every sort. CONSTITUTION:In the detecting method of existence of remaining thread 6 wound on a bobbin 1 color coded at every sort, remaining thread sensors 10a-10c setting sensitiveness according to respective color codes of the bobbins are provided, and the remaining sensor is selected based on judgement of the sort so as to detect existence of the remaining thread.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a residual yarn detecting method for surely detecting the presence or absence of residual yarn wound around bobbins that are color-coded according to product type.

[0002]

2. Description of the Related Art Spinning bobbins produced by a spinning machine for each type and supplied to the winder for the next process by type are color-coded for each type so that an operator can identify them. These spinning bobbins are inserted into a tray according to product type and supplied to each winding unit of the winder by the supply conveyor according to product type. The yarn is rewound into a package by each winding unit and then discharged onto a return conveyor. A bobbin removal station is provided in the middle of the return conveyor, and empty bobbins are removed from the tray at this station, and the empty bobbins that have been removed are classified by product type and returned to the spinning machine.

By the way, since bobbins discharged onto the return conveyor include bobbins having residual threads in addition to empty bobbins, a residual thread sensor for detecting the presence or absence of residual threads is installed at the station. The bobbin with residual thread is collected separately from the empty bobbin in order to process the residual thread.

[0004]

However, in the prior art, since the presence / absence of the residual thread is detected by one residual thread sensor, it is difficult to set the sensitivity of the residual thread sensor with respect to the color-coded bobbins. There is a risk of erroneously detecting the presence or absence of residual yarn.

Therefore, an object of the present invention is to provide a residual thread detecting method capable of reliably detecting the presence or absence of residual thread wound around bobbins that are color-coded according to product type.

[0006]

In order to achieve the above object, the method for detecting residual thread of the present invention is a method for detecting the presence or absence of residual thread wound around bobbins that are color-coded according to product type.
Providing a residual thread sensor with sensitivity set for each color of the bobbin,
The present invention is characterized in that the remaining yarn sensor is selected according to the type discrimination to detect the presence or absence of the remaining yarn.

[0007]

The present invention employs a plurality of residual thread sensors whose sensitivity is set for each color of the bobbin, and selects a residual thread sensor having a color sensitivity matching the type of the bobbin, that is, the background color of the bobbin, for example, by determining the type of the tray or the like. Since the presence / absence of the residual yarn is detected by the residual yarn sensor, the presence / absence of the residual yarn can be reliably detected.

[0008]

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

In FIG. 1, reference numeral 1 is a bobbin inserted on a tray 2, and this bobbin 1 is, for example, black for each type of yarn.
There are three colors, blue and yellow. The tray 2 is formed by projecting a peg 4 for inserting the bobbin 1 at the center of the upper part of a disk-shaped substrate 3. The tray 2 is also color-coded according to the type of yarn like the bobbin 1. The tray 2 may have an identification display portion such as a bar code or a magnetic ring corresponding to the type of yarn.

The bobbin 1 is a bobbin discharged onto the return conveyor 5 from a winder winding unit (not shown). In the illustrated example, a bobbin with a residual thread is shown instead of an empty bobbin. There is. The return conveyor 5 is mainly composed of a guide frame 7 for guiding the tray 2 and a belt 8 for transferring the tray 2. In the middle of the return conveyor 5, empty bobbins and bobbins with residual yarn are removed from the tray 2. A bobbin removing station 9 for taking out is provided.

In the station 9, a plurality of (three in the illustrated example) residual thread sensors (optical sensors) 10a to 10c, each of which has a sensitivity set for each color of the bobbin 1, detect the presence or absence of the residual thread 6 of the bobbin 1. The control unit 1 is installed with these detection signals.
1 is input. Further, a tray sensor (a reading device for reading the identification display section for a tray having an identification display section) 12 for detecting the color of the tray 2 is installed in the station 9, and the detection signal thereof is also sent to the control section 11. It is supposed to be entered.

When detecting the presence or absence of the residual yarn 6 on the bobbin 1, the control section 11 discriminates the product type based on the detection signal from the tray sensor 12, and the discrimination of the product type matches the product type. That is, one residual thread sensor 10a, 10b or 10c whose sensitivity is set to the background color of the bobbin 1 is selected. When the residual yarn 6 is not detected, the bobbin 1 is withdrawn from the tray 2 and classified by type. When the residual yarn 6 is detected, the bobbin 1 is withdrawn from the tray 2 and an empty bobbin is provided to process the residual yarn. It is designed to be collected separately from.

According to the above construction, when the bobbin 1 discharged from the winding unit of the winder together with the tray 2 onto the return conveyor 5 reaches the bobbin removing station 9, the type is discriminated via the tray sensor 12, One residual thread sensor 10a, 10b or 10c depending on the type of product
And the presence or absence of the residual yarn 6 is detected. When there is no residual thread 6, the empty bobbin is extracted from the tray 2 and classified by product type. When there is a residual thread 6, the bobbin with residual thread is extracted from the tray 2 to process the residual thread. Collected separately from empty bobbins.

The color of the bobbin 1 is detected by the residual thread sensor as a difference in each frequency of ABC as shown in FIG. 2, and when there is residual thread in each, it is detected like abc, so that one residual thread is detected. It is difficult for the yarn sensor to accurately detect the presence or absence of residual yarn. Therefore, as described above, a plurality of residual thread sensors 10a to 10c in which the sensitivity is set for each color of the bobbin 1 are adopted, and the residual thread sensor 10a whose sensitivity is set to the ground color of the bobbin 1 is determined by the type discrimination by the tray 2. Since 10b or 10c is selected and the presence or absence of the residual yarn 6 on the bobbin 1 is detected by the residual yarn sensor, it is possible to reliably detect the presence or absence of the residual yarn 6 wound around the bobbin 1 which is color-coded according to product type. It is possible to prevent false detection or malfunction.

In the embodiment, the type of product is discriminated by the tray 2, but it may be discriminated by the color of the bobbin 1.

[0016]

In summary, according to the present invention, the residual thread sensor having the sensitivity set for each color of the bobbin is provided, and the residual thread sensor is selected according to the type discrimination to detect the presence or absence of the residual thread. It is possible to reliably detect the presence or absence of the residual thread wound around the bobbin that is color-coded for each type.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a diagram showing a difference in frequency depending on the type and presence / absence of residual yarn.

[Explanation of symbols]

 1 bobbin 6 residual thread 10a-10b residual thread sensor

Claims (1)

[Claims] 1. A method for detecting the presence or absence of residual thread wound around bobbins that are color-coded according to product type, wherein a residual thread sensor having a sensitivity set for each color of the bobbin is provided, and the residual thread sensor is determined based on the type of product. A residual yarn detecting method, characterized in that the presence or absence of residual yarn is selected and detected.