JPH0598542A - Weaving warp length detector of weaving machine - Google Patents

Abstract

PURPOSE:To obtain a weaving warp length detector capable of accurately discovering cut mark at a necessary operation position such as woven fabric dropping or change of machine. CONSTITUTION:A cut mark CM presupplied to a given length position of warp 2 is discovered by a cut mark detector 11 of a given standard position P1, further reaching of the cut mark CM to a different position (operation position) P2 separated from the standard position P1 by an arbitrary distance is detected and a signal is outputted by a control device 12. By the signal, a cross roller automatic changing device 13, a machine changing device, etc., are operated. Detection of the cut mark CM at the standard position P1 is carried out by direct detection or calculation from an amount of revolution of warp beam 1 unwound and reaching of the cut mark CM to the operation position P2, for example, is detected by calculating length of woven fabric from the number of picks of weft inserting and density of weft or an amount of revolution of a surface roller 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weaving warp length detecting device for a loom.

[0002]

2. Description of the Related Art When a certain amount of weaving is performed on a loom and the cross roller is in a fully wound state, a series of cross roller replacement operations (cloth cloth cutting, cross roller lowering, empty roller mounting, cloth edge winding, etc.) are performed. Lowering work). As a method of managing the weaving length, there is a method of measuring the weaving cloth length and causing the cloth to be unloaded based on this. For example, the number of weft insertion picks is counted, the woven cloth length is calculated from this and the weft density, and the cloth unloading notice signal is output before the cloth length reaches a preset predetermined cloth length to prepare for cloth unloading work. Then, the cloth is unloaded at a predetermined cloth length (see JP-A-61-225358).

However, the shrinkage factor of the cloth varies depending on the cloth fell position, the surface roller position, the cross roller position, etc. on the loom, and even if the length of the woven cloth is measured at the surface roller position, the cloth is actually wound on the cross roller. Not only is it different from the woven fabric length, the warp consumption amount of the warp beam prepared in advance matches the amount of change in length when the warp yarn becomes a woven fabric, and the shrinkage ratio of the woven fabric, for the given fabric length. Without it, there is a problem that excess and deficiency will occur in the final counter.

For this reason, there is an industry in which weaving length is managed on the basis of the warp length measured in the warping step to carry out commercial transactions. In such an industry, in the warping step, the warp length is measured, and a cut mark is given by applying an ink or the like of a predetermined color for each predetermined length, and the cut mark is visually traced to a predetermined position. Do the undress when you come to.

[0005]

However, in the case where the warp length measured in the warping process is used as a reference as described above, when the cut mark reaches the work position such as cloth lowering, the work such as cloth lowering is actually performed. In order to do this, the operator needs to monitor until the cut mark actually attached to the warp reaches the working position, and it is automatically detected that the cut mark has reached the position required for work such as unloading cloth. It could not be detected.

Therefore, it is conceivable to provide a photoelectric sensor to detect the cut mark, but various operating members are densely placed at work positions such as cloth lowering, and when the photoelectric sensor is provided here, Since the device becomes complicated and there is a risk of erroneous detection due to the grease of the cutter for cutting the cloth and the chips of the cloth adhering thereto, the photoelectric sensor is provided at a position before the work position for lowering the cloth.

In view of the above situation, the present invention detects that the cut mark reaches the reference position, and also detects that the cut mark arrives at another position separated by an arbitrary distance from the reference position. Accordingly, it is an object of the present invention to provide a weaving warp length detecting device for a loom that can notify that a cut mark arrives at a position where an actual cloth lowering operation, a machine changing operation, or the like is performed.

[0008]

For this reason, the present invention provides a means for detecting that a cut mark previously given to a predetermined length position of a warp is rewound from a warp beam and reaches a predetermined reference position. Further, means for detecting the arrival of the cut mark at another position that is separated from the reference position by an arbitrary distance is provided, and the weaving warp length detection device of the loom is configured.

Here, there may be a plurality of different positions with different distances, and arrival detection may be performed for each position. Further, the arrival detection of the reference position may be calculated based on the amount of rewinding rotation of the warp beam.

[0010]

In the above construction, it is detected that the cut mark has reached the reference position by direct detection of the cut mark or calculation from the amount of rewinding rotation of the warp beam,
Furthermore, it detects that it has reached another position, which is an arbitrary distance away from this reference position, and outputs a signal, so it can accurately detect that the cut mark has reached the position where cloth lowering work or machine change work is to be performed. it can.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show a first embodiment. Figure 1
In the loom shown in (1), the warp beam 1 is sent out from the warp beam 1, passes through the backrest roller 3, the heddle 4 and the reed 5, reaches the cloth fell 6, and the weft yarn (not shown) is inserted and beaten. The woven cloth 7 is woven. Then, the woven woven cloth 7 is wound around the cross roller 10 via the breast beam 8 and the surface roller 9.

Here, the warp 2 wound around the warp beam 1 is provided with a cut mark CM in advance by applying a predetermined color ink or the like for each predetermined length in the warping step. In order to detect the CM from the light reflectance, a cut mark detector 11 including a light emitter / receiver is provided at a predetermined reference position (for example, near the backrest roller 3) P1 of the loom.

The signal from the cut mark detector 11 is input to the controller 12. During the weaving process, the control device 12 performs arithmetic processing as shown in the flowchart of FIG. 2, and finally outputs a cloth lowering work permission signal to the cross roller automatic changing device 13. The flowchart of FIG. 2 will be described. In step 1 (denoted as S1 in the figure; the same applies hereinafter), the signal from the cut mark detector 11 (amount of light received by the light receiver) is read, and in the next step 2, presence or absence of the cut mark CM is read. Is detected, and if there is a cut mark, the process proceeds to step 3.

In step 3, the pick counter for counting the number of weft insertion picks is reset and the counting of the number of weft insertion picks is started. Then, steps 4 to 6 are executed. In step 4, the value of the pick counter is read, and in step 5, the weaving cloth length α after detecting the cut mark is calculated from the value of the pick counter and the preset weft density. Then, in step 6, the woven cloth length α after the cut mark is detected is compared with a predetermined value α _0, and if it is less than this value, the process returns to step 4, and if they match, the process proceeds to the next step 7.

The predetermined value α ₀ here is the path length of the warp (or woven cloth) from the reference position P1 where the cut mark detector 11 is provided to the cloth lowering work position (near the cross roller 10) P2, and the cut The fact that the woven cloth length α after the mark detection reaches the predetermined value α ₀ means that the cut mark CM has reached the cloth lowering work position P2. Therefore, in step 7, the cloth lowering work permission signal is output. With this, the automatic cross roller exchange device 13 is operated, the cloth is cut, the cross roller is lowered, and the empty roller is mounted.
A series of replacement work (cloth lowering work) of the cross roller 10 such as cloth end winding is performed.

Therefore, in this embodiment, the cut mark detector 11 corresponds to a means for detecting that the cut mark previously applied to the warp reaches the reference position, and the control device 12
It corresponds to a means for detecting that the cut mark has reached another position that is apart from the reference position by an arbitrary distance. In the present embodiment, after detecting the cut mark at the reference position P1,
The arrival of the cut mark from the reference position P1 to the cloth lowering work position P2 is detected by calculating the weaving cloth length from the number of picks for weft insertion and the weft density.
From the unloading work position P2 is not so long,
Even if the cloth length is measured in this way, the error is small and practically sufficient.

The arrival of the cut mark from the reference position P1 to the cloth lowering work position P2 can also be detected by the so-called cross counter from the rotation amount of the surface roller 9. 3 to 8 show a second embodiment.
Referring to FIG. 3, in the warping device A, the warp yarns 2 drawn out from a large number of packages mounted on the creel 21 are wound on a warping drum 22 of the partial warping machine (warping step; partial warping step). Also called).

Here, a warp length measuring device 23 is provided, and the warp length is measured from the number of revolutions of the press roller 23a which rotates as the warp 2 advances. Also, warping drum 22
A take-up amount measuring device (rotometer) 24 for measuring the take-up rotation amount (hereinafter, simply referred to as "take-up amount") is provided, and is output from the pickup 24a in synchronization with the rotation of the warping drum 22. The amount of rotation of the warping drum 22 is measured from the pulse signal.

These pieces of information are input to the control device 25.
In the control device 25, arithmetic processing is performed as shown in the flowchart of FIG. 4 during the warping process, and finally certain items are written in the IC card 27 by the card reader / writer 26. The flowchart of FIG. 4 will be described. In step 51, the warp length measuring device 23 is reset, and in step 52, the winding amount measuring device 24 is reset.

In step 53, it is judged whether or not the warping process is completed, and when it is completed, the process proceeds to step 54. Step
At 54, the warp length (total warp length) Y measured by the warp length measuring device 23 is read, and at step 55, the winding amount of the warp drum 3 (total winding amount) measured by the winding amount measuring device 24.
Read N.

In step 56, cut mark calculation is performed.
That is, based on the total warp yarn length Y and the total winding amount N, the warp drum 22 is wound for each desired warp yarn length (predetermined counterlength, hereinafter referred to as "designated counterlength") y in the beam winding process. Return rotation amount (hereinafter simply referred to as “rewind amount”) r ₁ = f
(Y, N, y), r ₂ = f (Y, N, 2y), r ₃ = f
Calculate (Y, N, 3y).

The calculation method will be described in detail below.
At the time of warping, as shown in FIG. 5, the warp is wound. Here, d ₀ is the empty drum diameter (known), and Δd is the thickness of the wound thread (unknown). Therefore, the total warp length Y is represented by the following equation. Y = π [(d ₀ + Δd) + (d ₀ + 3Δd) + ... + (d ₀ + (2N-1) Δd)] = π (Nd ₀ + N ² Δd) (1) If Δd is solved, Δd = (Y / π−Nd ₀ ) / N ² (2), and Δd can be known from Y and N.

At the time of winding the beam, as shown in FIG.
The warp yarn is rewound by the following circumferential length each time it is rewound by rotation. 1st rotation π (d ₀ + (2N-1) Δd) 2nd rotation π (d ₀ + (2N-3) Δd) :: rth rotation π (d ₀ + (2N- (2r-1)) Δd Therefore, the warp length y rewound when the amount of rewinding of the warp drum 3 in the beam winding step is r is the sum of the circumferential lengths and is as follows.

Y = π [(d ₀ + (2N-1) Δd) + (d ₀ + (2N-3) Δd) + ... + (d ₀ + (2N- (2r-1)) Δd) ] = Π [rd ₀ + (2rN-r ² ) Δd] (3) By substituting the equation (2) into the equation (3), y = π [rd ₀ + (2rN-r ² ) (Y / π-Nd ₀ ) / N ² ] = π [rd ₀ + (2rN-r ² ) (Y-πNd ₀ ) / πN ² ] = [(2Y-πNd ₀ ) / N] r-[(Y-πNd ₀ ) / N ² ] r ² (4) Therefore, from this equation (4), a quadratic equation of (Y−πNd ₀ ) r ² −N (2Y−πNd ₀ ) r + N ² y = 0 (5) is obtained. can get.

If a positive solution is obtained by solving the quadratic equation of r in the equation (5), r = [N (2Y-πNd ₀ ) + N {(2Y-πNd ₀ ) ^2-4 (Y-πNd ₀ ) y} ^1/2 ] / [2 (Y-πNd ₀ )] (6) Incidentally, in this equation (6), if K = Y-πNd ₀ (7), then r = [N ( Y + K) + N becomes ^{{(Y + K) 2 -4Ky} } 1/2 ] / 2K ... (8).

Therefore, by substituting the designated anti-length (or a multiple thereof) for y in the equation (6) or (8), the total warp length Y and the total winding amount N are detected. It is possible to calculate the rewinding amount r (r ₁ , r ₂ , r ₃ ) of the warping drum 22 for each length y. Similarly, in the beam winding process, when the warp lengths are y-α ₀ , 2y-α ₀ , 3y-α ₀ , the rewinding amount r ₁ ′ = f (Y, N, y of the warping drum 22.
−α ₀ ), r ₂ ′ = f (Y, N, 2y−α ₀ ), r ₃ ′
= F (Y, N, 3y−α ₀ ) is calculated. α ₀ is the reference position P1 of the loom C (near the backrest roller 3)
Is the path length of the warp yarn (or woven fabric) from the cloth unloading work position (near the cross roller 10) to P2.

In step 57, the rewinding amounts r ₁ , r ₂ , r ₃ and r ₁ ′ of the warping drum 22 for each designated anti-length y calculated,
The card reader / writer 26 writes r ₂ 'and r ₃ ' into the IC card 27. Returning to FIG. 3, in the beam winding device B, the warp yarn 2 wound around the warping drum 22 of the partial warper is unwound and wound into the warp beam 1 (beam winding step; beam Also called warping process).

Here, a rewinding amount measuring device (rotometer) 28 of the warping drum 22 is provided, and the warping drum is detected from the pulse signal output from the pickup 28a in synchronization with the rotation of the warping drum 22. The rewind amount of 22 is measured. Further, a winding amount measuring device (rotometer) 29 of the warp beam 1 is provided, and the pickup 29 is synchronized with the rotation of the warp beam 1.
The amount of rotation of the warp beam 1 is measured from the pulse signal output from a.

These pieces of information are input to the control device 20.
Further, the IC card 27 is set in the card reader / writer 31, and the information in the IC card 27 is input to the control device 30. In the control device 30, during the beam winding process, arithmetic processing is performed as shown in the flowchart of FIG. 7, and finally certain items are written in the IC card 27 by the card reader / writer 31.

The flowchart of FIG. 7 will be described.
In step 61, IC card 27 to card reader / writer 31
Thus, the stored values r ₁ , r ₂ , r ₃ and r ₁ ′ of the amount of rewinding of the warping drum 3 for each designated anti-length in the beam winding process are
Read r ₂ 'and r ₃ '. In step 62, the reciprocal number counter is set to 0, in step 63 the rewinding amount measuring device 28 is reset, and in step 64, the winding amount measuring device 29 is reset.

In step 65, the rewinding amount of the warping drum 22 measured by the rewinding amount measuring device 28 is read, and in the next step 66, it is determined whether the cut marks (r ₁ , r ₂ , r ₃ ) are formed. Judge and repeat these until the cut mark is reached. If the cut mark is reached, proceed to step 67, increment the counter by 1 and read the take-up amount measured by the take-up amount measuring device 29 at the next step 68. The winding amount and the amount of winding are written in the IC card 27 by the card reader / writer 31.

Next, at step 70, it is judged whether or not it is the final counter based on the value of the counter number counter. If NO, step 65
Return to, and if YES, end this routine. As a result, the winding amount of the warp beam 1 for each designated anti-length in the beam winding process is stored as m ₁ , m ₂ , and m ₃ .
Similarly, it is determined whether or not the rewinding amount of the warping drum 22 measured by the rewinding amount measuring device 28 is r ₁ ′, r ₂ ′, r ₃ ′. Winding amount measuring device 29
The winding amount measured by is read, and this is also written in the IC card 27 by the card reader / writer 31, and m ₁ ', m
Remember ₂ ', m ₃ '.

Referring back to FIG. 3, in the loom C, the warp beam 1 is sent out from the warp beam 1, passes through the backrest roller 3, the heddle 4 and the reed 5, reaches the cloth fell 6, and the weft (not shown) is inserted. The woven fabric 7 is woven by being beaten by the blades. Then, the woven cloth 7 is woven through the breast beam 8 and the surface roller 9 and the like, and the cross roller 10
It is wound up (weaving process).

Here, a rewinding amount measuring device (rotometer) 32 of the warp beam 1 is provided, and the rewinding amount of the warp beam 1 is determined by a pulse signal output from the pickup 32a in synchronization with the rotation of the warp beam 1. The return amount is measured. This information is input to the controller 33. In addition, the IC card 27
Is set in the card reader / writer 34, and the IC card
The information in 27 is input to the controller 33. This controller 33
In the weaving process, arithmetic processing is performed as shown in the flowchart of FIG. 8 and finally a cloth lowering work permission signal is output to the cross roller automatic changing device 13.

The flowchart of FIG. 8 will be described.
In step 71, IC card 27 to card reader / writer 34
The memory values m ₁ , m ₂ , m ₃ and m ₁ ′, m ₂ ′, m ₃ ′ of the winding amount of the warp beam 1 for each designated anti-length in the beam winding process are read by. In step 72, cut mark calculation is performed. That is, the unwinding amount m ₃ of the warp beam 1 for each designated anti-length in the weaving process corresponding to the stored values m ₁ , m ₂ , and m ₃ of the winding amount of the warp beam 1 for each designated anti-length in the beam winding process. -M ₂ , m _3-
Calculate m ₁ and m ₃ .

In step 73, the reciprocal number counter is set to 0, and in step 74, the rewinding amount measuring instrument 32 is reset. In step 75, the rewinding amount of the warp beam 1 measured by the rewinding amount measuring device 32 is read, and in the next step 76, it is determined whether the cut marks (m ₃ −m ₂ , m ₃ −m ₁ , m ₃ ) are obtained. It is judged whether or not, and these are repeated until the cut mark is obtained.

If a cut mark is found, step 77
In step 78, the counter number counter is incremented by 1, and a cut mark detection signal is output in the next step 78. This can be used as a warning signal for unloading work. Next, at step 79, it is judged based on the value of the counter number counter whether or not it is the final counter. If NO, the routine proceeds to the next step 80, and if YES, this routine ends.

In step 80, the rewinding amount of the warp beam 1 measured by the rewinding amount measuring device 32 is read, and in the next step 81, (m ₃ −m ₂ ) + (m ₂ −m ₂ ′) = m ₃ -M
₂ 'or _{(m 3 -m 1) + (} m 1 -m 1') = m 3 -m
_It judges whether it becomes ₁ 'and repeats until it becomes this. When this occurs, it means that the length of the weaving warp after the cut mark detection signal is output becomes the predetermined value α ₀ , which means that the designated counter length is obtained at the cloth lowering work position P2.

Therefore, in this case, the process proceeds to step 82 to output the cloth lowering work permission signal. As a result, the automatic cross roller changing device 13 is operated to perform a series of replacement work of the cross roller 10 (cloth lowering work) such as cutting the cloth, lowering the cross roller, mounting an empty roller, and winding the cloth end. After this, the process returns to step 75.

Therefore, in this embodiment, particularly in the steps 75 to 78 of the control device 33, the warp length unwound from the warp beam with the predetermined position of the loom as a reference position based on the unwinding rotation amount of the warp beam. Is equivalent to a means for detecting that the cut mark reaches the reference position by calculating, and particularly the part of steps 80 to 82 of the control device 33 is the cut mark at another position apart from the reference position by an arbitrary distance. Corresponds to a means for detecting the arrival of.

In this embodiment, after the cut mark is detected at the reference position P1, the arrival of the cut mark from the reference position P1 to the cloth lowering work position P2 is detected from the rewinding amount of the warp beam 1. Alternatively, it may be detected by calculating the length of the woven cloth from the number of picks for weft insertion and the density of wefts, or it may be detected from the amount of rotation of the surface roller 9.

Further, in the above-mentioned embodiment, another position distant from the reference position by an arbitrary distance is shown as the cloth lowering work position, but not limited to this, for example, the machine changing work position, that is, the cut mark is the cloth fell position. It can also be applied to the case of cutting the cloth at this position when it comes to, and it may also be the position to set the time to carry the empty cross roller by the automatic carrier so that the automatic cloth lowering device can be operated. A plurality of these can be set at arbitrarily different distances from the reference position.

Furthermore, in the above-mentioned embodiment, the other position, which is separated from the reference position by an arbitrary distance, is set to the downstream side with respect to the warp advancing direction from the reference position, but the present invention is not limited to this and is set to the upstream side. can do. That is, it is inevitable that the distance cut mark from the reference position moves to the downstream side and reaches the arbitrary position, so that the mark must be on the downstream side. However, when the cut mark is wound around the warp beam, it is given every several tens of meters (one anti), so the cut mark that is one upstream of the cut mark that has reached the reference position (true reference position) If the position is set as a virtual reference position and another position is set on the downstream side by an arbitrary distance, the result is that another position is set on the upstream side by an arbitrary distance on the upstream side of the true reference position. It will be.

[0044]

As described above, according to the present invention, it is detected that the cut mark is rewound from the warp beam and reaches the reference position, and the cut mark reaches another position separated by an arbitrary distance from the reference position. Since this is detected and a signal is output, it is possible to obtain an effect that the cut mark can be accurately detected at a required position in the cloth lowering work, the machine changing work, or the like.

[Brief description of drawings]

FIG. 1 is a system diagram showing a first embodiment of the present invention.

FIG. 2 is a flowchart of a control device for a loom.

FIG. 3 is a system diagram showing a second embodiment of the present invention.

FIG. 4 is a flowchart of a controller of the warping device.

FIG. 5 is a diagram showing an aspect of cut mark calculation.

FIG. 6 is a diagram showing an aspect of cut mark calculation.

FIG. 7 is a flowchart of a control device of the beam winding device.

FIG. 8 is a flowchart of a control device for the loom.

[Explanation of symbols]

 1 Warp beam 2 Warp 3 Backrest roller 6 Cloth front 10 Cross roller 11 Cut mark detector 12 Control device 13 Automatic cross roller changer 22 Warp beam 32 Unwinding amount measuring device 33 Control device P1 Reference position P2 Cloth lowering work position

Claims (3)

[Claims] 1. A means for detecting that a cut mark previously given to a predetermined length position of a warp reaches a predetermined reference position after being rewound from a warp beam, and further separated from the reference position by an arbitrary distance. And a means for detecting the arrival of the cut mark at another position, a weaving warp length detecting device for a loom. 2. The weaving warp length detecting device for a loom according to claim 1, wherein the different positions are provided at a plurality of positions with different distances, and arrival detection is performed at each position. 3. The weaving warp length detecting device for a loom according to claim 1, wherein the arrival of the reference position is detected based on the amount of rewinding rotation of the warp beam.