JP3157334B2 - Warp residual yarn amount detection device of loom - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for detecting a warp residual yarn amount of a loom, and more particularly to an improvement of a technology for detecting a warp beam replacement timing of a loom.

[0002]

2. Description of the Related Art A warp of a warp beam set on a loom is preliminarily marked with a cut mark for each predetermined length (for example, 5 yarns), and the cloth is unwound at the position of each cut mark. When a new warp beam is set on the loom, information on the number of cut marks (for example, four) included in the warp beam is given to the worker, and the worker records this information.

[0003] Conventionally, generally after the start of weaving, an operator records the number of times of cloth unloading at each cut mark. That is, each time the cloth is unloaded, the worker subtracts the number of times of unloading from the total number of cut marks to determine whether or not the cut mark to be visually recognized is the last cut mark. If it is determined that the mark is the last cut mark, weaving is finished there, and the remaining warp is discarded or left to be tied with the warp of the warp beam to be set next.

However, in such a conventional method, the judgment of the final cut mark may be erroneously made because the judgment of the final cut mark depends on human factors such as an operator. For example, when you are very busy,
When performing the cloth unloading, sometimes the user forgets to subtract the number of times of cloth unloading from the total number of cut marks. In other words, it is inevitable that human factors such as clerical errors and forgetting to record enter the work.

[0005] In this way, if the operator makes a mistake in determining the final cut mark, wasteful disposal of the warp or, conversely, wasteful weaving may be performed. That is, if the operator mistakenly determines that the visually recognized cut mark is the final cut mark even though it is not yet the final cut mark, the remaining warp is discarded unnecessarily despite the fact that weaving is possible. Will be lost. Conversely, if the operator determines that the cut mark is not the final, even though the visually recognized cut mark is the final cut mark, then weaving is continued and wasteful weaving is performed on the warp to be discarded. Become.

[0006]

In the former case, it is disadvantageous from the viewpoint of resource utilization, and in the latter case, the operating efficiency is inevitably reduced due to wasteful operation of the loom in addition to waste of the weft. In addition, in the latter case, it is not possible to secure a sufficient warp length for binding with the warp of the warp beam to be set next. In any case, it is significantly disadvantageous from the viewpoint of overall production efficiency.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate wasteful waste and wasteful weaving of warps conventionally inevitably generated due to the presence of human factors in the operation of detecting a final cut mark when replacing a warp beam of a loom. And to improve the production efficiency of the entire weaving process.

[0008]

Therefore, according to the present invention, the warp remaining length of a warp wound on a warp beam is detected by a warp remaining yarn length detecting mechanism, and when the warp is woven by a warp shrinkage ratio setting device. Set the weaving length per unit cloth by using the unit weaving length setting unit, and connect the cloth weft warp length calculation mechanism to the output side of the unit shrinkage ratio setting unit and unit weaving length setting unit. Based on these output signals, the warp length necessary for weaving the weaving length per unit cloth is calculated, and a comparison mechanism is connected to the output side of the warp remaining yarn length detection mechanism and the cloth discharge warp length calculation mechanism. The gist of the present invention is to compare the detected remaining yarn length and the unwound warp length based on these output signals, and to output an alarm when the detected remaining yarn length becomes smaller than the unwound warp length at the unloading timing. Is what you do.

[0009]

The warp remaining yarn length detecting mechanism outputs a warp remaining yarn length signal corresponding to the remaining yarn length of the warp wound on the warp beam. The warp setting device 5 outputs a warp ratio signal corresponding to the ratio between the unit warp length and the woven fabric length produced by consuming the warp, ie, the warp ratio. The unit weaving length setting device 4 outputs a unit weaving length signal corresponding to the weaving length per unit cloth wholesale. Cloth warp length corresponding to the cloth warp length necessary for weaving the weft length per unit cloth by the cloth warp length calculating mechanism based on the output signals from the warping ratio setting unit and unit weaving length setting unit Output a signal. The comparison mechanism outputs a comparison signal having a content corresponding to the state to the alarm mechanism when the detected remaining yarn length is smaller than the warp length, and the alarm mechanism receives the signal,
At the time of cloth unloading, an alarm signal is output.

[0010]

FIG. 1 shows the basic configuration of the apparatus according to the present invention. That is, the warp remaining yarn length detection mechanism 3 detects the remaining yarn length of the warp wound on the warp beam and outputs a corresponding warp remaining yarn length signal S3. The warping / shrinkage ratio setting unit 5 sets the warping / shrinkage ratio (α) when the warp is woven and outputs a corresponding warping / shrinkage ratio signal S5. Further, the unit weaving length setting unit 4 sets a weaving length per unit of cloth wholesale and outputs a corresponding unit weaving length signal S4. An output side of the warp shrinkage ratio setting device 5 and the unit weaving length setting device 4 is connected to a cloth unwinding warp length calculating mechanism 6.
4. Based on S5, the length of the warp necessary for weaving the weaving length per unit of the cloth is calculated, and the corresponding warp length signal S6 is output. A comparison mechanism 7 is connected to the output side of the warp remaining yarn length detecting mechanism 3 and the unwound warp length calculating mechanism 6, and calculates the detected remaining yarn length and the unwound warp length based on these output signals S3 and S6. If the detected remaining yarn length becomes smaller than the unwound warp length at the timing when the cloth unloading signal S8 is input, a comparison signal S7 having a content corresponding to the state is output from the comparison mechanism 7 to the alarm mechanism 9. ,
The warning mechanism 9 receives this and outputs a warning signal S9.

In the above description, the expression "timing of cloth unloading" is used, but it suffices if it is a time related to cloth unloading. For example, it may be either the time when the cloth unloading starts or the time when the cloth unloading ends.

There are various methods for detecting the warp residual yarn length by the warp residual yarn length detecting mechanism 3, and there are a method of obtaining a weaving length and a method of using winding information in a warping process. These will be described later in detail.

An alarm signal S9 output from the alarm mechanism 9
May be a visible display such as an alarm lamp, or an audible display such as an alarm buzzer, and may be given in various known forms.

Various methods can be considered for using the alarm signal S9. As described above, an alarm lamp or an alarm buzzer may be excited to directly give an alarm to an operator. When an automatic cloth unloading device is provided, the continuous operation of the loom may be stopped. After the loom is automatically stopped in this way, the warp yarn may be discarded, or if the remaining yarn length is shorter than a predetermined length, the warp yarn may be left to tie with the warp yarn of the warp beam to be set next. If the remaining yarn length is longer than the predetermined length, weaving is performed by changing the target cloth weaving length to a smaller one, and then the loom is stopped when the changed cloth weaving length is reached. After the loom is stopped, the warp may be discarded, as in the above case, or if the remaining yarn length is shorter than the predetermined length, the warp may be left to tie with the warp of the next warp beam to be set. Good. In this case, it is necessary to provide information on how long the remaining yarn length is, so it is desirable to display the remaining yarn length on a display.

Next, the method of detecting the warp remaining yarn length by the warp remaining yarn length detecting mechanism 3 will be described in detail. FIG. 2 shows an example of a specific configuration of the warp remaining yarn length detecting mechanism 3, which is based on a method of obtaining a weaving length. In this configuration, one signal, i.e., a pick signal, is detected per one revolution of the loom by the proximity switch 31 provided facing the main shaft 1 of the loom. The counter 32 counts this pick signal and detects the total number of rotations of the spindle 1 and the total number of picks. However, since the total number of picks needs to be updated each time a warp beam is set on the loom, the counter 32 is reset by inputting the pick signal from the proximity switch 31 and the warp beam set signal S32. Is to be performed. As a result, the counter 32 outputs a signal indicating the total number of picks P after setting the warp beam.

This configuration is further provided with a weft density (number of shots) setting unit 33, which outputs a signal indicating the weft density set for the cloth to be woven. Warping length setting device 3
4 outputs a signal indicating the set warping length h0 of the warp beam.

The above three signals, that is, the signals indicating the total number of picks P, the latitude density B, and the warping length h0 are all input to the common computing unit 35. In addition, this computing unit 35
Similarly, a signal indicating the rate of contraction α is input from the rate-of-contraction rate setting unit 5 (see FIG. 1).

The computing unit 35 performs the following computation based on these input signals. Assuming that the woven fabric length is H and the consumed warp length is h, the warping ratio α is generally represented by the following equation.

[0019]

(Equation 1)

Assuming that the warping length set by the warping length setting unit 34 is h0 and the warp consumption length is h1, the remaining warp yarn length hx is expressed by the following equation.

[0021]

(Equation 2)

Further, assuming that the weaving length woven by consuming the warp length h1 is H1, the warp consumption length h1 is represented by the following equation.

[0023]

(Equation 3)

From these relationships, the warp remaining yarn length hx is given by the following equation.

[0025]

(Equation 4)

Here, the warping length h0 is given in advance by the warping length setting unit 34 as described above, and the warping ratio α is given in advance by the warping ratio setting unit 5, respectively. Therefore, weaving length H1
Is obtained, the warp remaining yarn length hx can be calculated. These calculations are all performed by the arithmetic unit 3 in FIG.
5, the obtained warp remaining thread length hx is output from the warp remaining thread length detection mechanism 3 as a warp remaining thread length signal S3.

Next, as an example of a method for obtaining the weaving length H1, the total pick number P obtained in the configuration shown in FIG.
Then, the following equation may be used using the weft density B.

[0028]

(Equation 5)

FIG. 3 shows another example of the specific construction of the warp remaining yarn length detecting mechanism 3, which is based on a method utilizing the amount of rotation of a roller which rotates as the woven fabric moves. It is. In this configuration, for example, a rotation amount detector 36 such as an encoder is attached to the cloth take-up roller 2 of the loom, and a signal indicating the rotation amount R is output. As the warping length setting device 37, the same as the warping length setting device 34 shown in FIG. 2 can be used, thereby outputting a signal indicating the warping length h0. These signals and a signal indicating the warping ratio α from the warping ratio setting unit 5 are input to a calculator 38, and as a result of the calculation, a warp remaining yarn length signal S3 corresponding to the remaining yarn length hx is output. According to this example, the weaving length H1 is equal to the rotation amount R.
Can be obtained by

FIGS. 4 and 5 show still another example of the specific structure of the warp remaining yarn length detecting mechanism 3, which is based on a method utilizing winding information in a warping process. In this case, the warp remaining yarn length detecting mechanism 3 includes a warping side portion shown in FIG. 4 and a weaving side portion shown in FIG.

That is, on the warping side shown in FIG. 4A, a yarn length measuring device 12 such as an encoder is attached to a roller for feeding the warp to the warping beam 11, and the warping beam is provided. A rotation amount detector 13 such as an encoder is attached to 11. Thread length h from these
And the signal indicating the amount of rotation R are input to the arithmetic unit 14 from the start to the end of the warping of the warping beam 11.
The arithmetic unit 14 recognizes the correlation between the yarn length h and the rotation amount R as shown in FIG.
Store in that memory.

On the weaving side shown in FIG. 5A, a warp beam 21 is provided with a rotation amount detector 22, and a signal indicating the rotation amount R is input to a calculator 24. The correlation between the thread length h and the amount of rotation R, which is recognized and stored in the calculator 14 on the warping side, is stored in the memory of the calculator 24 in the opposite form as shown in FIG. Therefore, when a signal indicating the rotation amount R is input from the rotation amount detector 22 after setting the warp beam 21, the arithmetic unit 24 checks this with the contents stored in the memory, and the warp indicating the remaining yarn length hx. The remaining yarn length signal S3 is output.

In the above arrangement, the transmission of the stored contents from the warping-side computing unit 14 to the weaving-side computing unit 24 may be performed by using a storage medium such as a floppy disk or a memory card. A connection may be made to transmit and receive signals. In the case where the warping side and the weaving side are centrally managed, the two computing units may be combined and processed by one computing unit.

Further, assuming that the cloth weaving weaving length for the cloth weaving set in the unit weaving length setting unit 4 is H0, the cloth weaving warp length calculating mechanism 6 in FIG. 1 converts this to the warp length by the following equation. .

[0035]

(Equation 6)

When the weaving length is set as the length of the cloth after being cut off from the loom, the above equations (1) and (2) are used.
The "shrinkage ratio" can be considered for the weaving length in the formula. This is because the woven fabric cut off from the loom shrinks at a predetermined ratio (this is referred to as a shrinkage ratio) with respect to the woven fabric on the loom.

[0037]

Since the operation of detecting the final cut mark is performed completely automatically, wasteful disposal and weaving of the warp due to the intervention of human factors can be avoided. Therefore, the production efficiency of the whole weaving process is greatly improved as compared with the related art in which the detection operation relies on human factors.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an overall configuration of the present invention.

FIG. 2 is a block diagram showing an example of a warp remaining yarn length detection mechanism.

FIG. 3 is a block diagram showing another example of the warp remaining yarn length detection mechanism.

FIG. 4 is a block diagram showing a warping process side of still another example of the warp remaining yarn length detecting mechanism.

FIG. 5 is a block diagram showing a weaving process side of still another example of the warp remaining yarn length detection mechanism.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Loom main shaft 2 Winding roller 3 Warp remaining yarn length detection mechanism 4 Unit weaving length setting device 5 Warp shrinkage ratio setting device 6 Cloth unwinding warp length calculation mechanism 7 Comparison mechanism 9 Alarm mechanism α Warp shrinkage ratio P Cumulative number of picks B Weft density R rotation amount h thread length

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) D03J 1/20 D03D 49/06 D03D 51/20

Claims (4)

(57) [Claims] 1. A warp residual yarn length detecting mechanism for detecting a residual yarn length of a warp wound on a warp beam, a warp shrinkage ratio setting device for setting a warp shrinkage ratio when a warp is woven, and a unit cloth unloader. A unit weaving length setting unit for setting a weaving length per unit, and a weaving length per unit cloth union based on these output signals which are connected to the output side of the unit for setting the weaving ratio and the unit for setting the weaving length. A warp length calculating mechanism for calculating a required warp length for the warp, a warp remaining yarn length detecting mechanism, and a remaining warp length detecting mechanism based on these output signals. A loom comprising a comparison mechanism for comparing the length of the unwound warp with a warning mechanism that outputs an alarm when the detected remaining yarn length is smaller than the length of the unwound warp at the timing of the unwound. Warp residual yarn amount detector. 2. A counter for outputting a signal indicating the total number of picks after warp beam setting in relation to the rotation of the main shaft of the warp, and a weft density for outputting a signal indicating the weft density. A setting device, a warping length setting device for outputting a signal indicating the warping length, and receiving these output signals and a signal indicating the warping / shrinking ratio from the warping / shrinking ratio setting device, outputs a signal indicating the remaining yarn length. 2. The apparatus according to claim 1, further comprising: 3. A rotation amount detector for outputting a signal indicating a rotation amount of a roller which rotates with the movement of the woven fabric, and a warping amount detector for outputting a signal indicating a warping length. It is characterized by comprising a warp length setting device, and an arithmetic unit that receives these output signals and a signal indicating the warping ratio from the warping ratio setting device and outputs a signal indicating the remaining yarn length. The device according to claim 1. 4. The warp residual yarn length detecting mechanism comprises a warping side portion and a weaving side portion. The correlation between the yarn length obtained at the warping side portion and the rotation amount of the warping beam is provided. 2. The apparatus according to claim 1, wherein the signal is transmitted to a weaving side, and the weaving side section outputs a signal indicating the remaining yarn length by checking the amount of rotation of the warp beam against the correlation.