JPS6040093A - Dyeing sewing machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a sewing machine, and particularly to a dyeing mechanism disposed close to the sewing machine that supplies upper thread to the sewing machine while selectively dyeing the thread with one of a plurality of colors. This invention relates to a dyeing sewing machine equipped with a dyeing sewing machine.

(Objective) An object of the present invention is to generate a signal at an appropriate timing to command a change in thread color in the dyeing mechanism of a dyeing sewing machine, and to appropriately dispose of the waste system that occurs due to the change in thread color. It is an object of the present invention to provide a dyeing sewing machine having a means for processing.

(Prior art) Conventionally, sewing work using a sewing machine is performed using sewing thread of a predetermined color prepared in advance, but it is especially necessary to prepare sewing thread of each color for pattern sewing or embroidery sewing work using a sewing machine. Also, when changing the sewing thread during sewing work, raise the presser foot, cut the upper thread, remove the upper thread, install a different color of needle thread on the sewing machine, and adjust the thread guide and thread tension. The needle must be re-threaded through the eye of the needle using a device, a balance, etc., and this work is extremely complicated and time-consuming, and has the disadvantage that it is difficult to automate the work.

One way to solve this problem is to use a dyeing sewing machine that is located close to the sewing machine and has a dyeing mechanism that selectively dyes the thread with one of a plurality of colors while supplying the needle thread to the sewing machine. It is extremely effective to use

An unimportant problem in smoothly proceeding with sewing work using a dyeing sewing machine is the problem of changing colors in the dyeing machine at an appropriate time.

Conventionally, color changes in a dyeing device have been automatically performed at a fixed timing based on a color change command signal stored in advance together with a sewing pattern in a storage device.

This is done based on the thread consumption calculated based on the design of the sewing pattern, but the thread consumption due to actual sewing work is
Variations occur due to various factors such as thread tension and tip thickness, resulting in an error between the actual thread consumption and the calculated thread consumption, making it impossible to smoothly change thread colors during sewing work. There was crab.

The present invention was devised in view of the above-mentioned current situation and as a result of intensive studies on a method for generating a color change command in a dyeing apparatus at an appropriate time.

(Structure) That is, the present invention provides a dyeing sewing machine equipped with a dyeing device disposed close to the sewing machine for selectively dyeing thread with one of a plurality of colors while supplying upper thread to the sewing machine. A dyeing sewing machine and a dyeing sewing machine characterized in that the dyeing sewing machine has a needle thread consumption measuring means and a control means for generating a signal for changing the color in the dyeing device based on the result of measuring the needle thread consumption. , a dyeing sewing machine having a control means to perform understitching as an understitch in the close seam part of the sewing pattern as a disposal of the waste surplus generated due to the color change of the thread by the dyeing device. The following explanation is based on .

The outline of the dyeing sewing machine of the present invention will be explained based on FIG.
), a thread consumption detection device (5), and a sewing machine (not shown).

White sewing thread (6
) is guided by the thread guide (7) and given appropriate tension by the thread tension device (8), and then introduced into the dyeing device (1).
A driving device such as an electromagnetic solenoid moves the thread up and down between a first position where the thread is guided to the upper part of the coloring material applicator 0-a] and a second position where the thread is guided to the coloring material application surface of the coloring material applicator. The color of one color material applicator selected from among the plurality of color material applicators (1-a) guided by the thread guide (1-d) and fitted on the rotating disk (1-b). A colorant solution in which a colorant such as a dye is dissolved is applied to the coated surface.

The coloring material applicator (1-a) has a porous material such as felt that absorbs the electrostatic solution stored in the container and has an exposed surface KM, and when the thread comes into contact with the exposed surface, the coloring material is applied to the thread. After the solution has been applied, the color change is performed by positioning the thread guide (x-d) in the upper position and pulling the thread (6) away above the color material applicator (X-a), as well as applying multiple color material applicators (X-a). ) fitted with a rotating disk (x-b) is rotated by a shaft (]-c) rotated by a drive phase motor (not shown) to apply a colorant applicator (X-a) of the desired color. ) is selectively positioned, the thread guide (1-d) descends and guides the thread (6) so that it comes into contact with the coloring material application surface of the coloring material applicator (1-a).

The yarn (6) coated with the coloring material is led to a pre-drying device (2), and after being pre-dried by blowing hot air, etc., it is led to a coloring material fixing and drying device (3) via a thread guide (9). The yarn (6) is brought into close contact with the surface of the space heater (3-a) by being guided by a guide rod (3-b) that moves up and down, and the electric dyeing is fixed on the yarn (6) by heat setting, completing the dyeing.

The dyed yarn (6) is guided to the yarn feeding device (4), and in the yarn feeding device (4), a light shielding plate (4-
c) is moved up and down in the kite groove (s-d) by the tension of the thread, and is turned ON and OFF by a signal outputted by the thread unwinding roller (4-a) and a driven roller driven by a drive motor. A fixed amount of the yarn (6) held between the rollers (4-b) is let out in portions through the yarn guides αq and al toward the yarn consumption amount detection device (5).

An embodiment of the yarn consumption detection device (5) is as shown in FIGS. 2 and 3, in which the yarn (6) guided to the yarn consumption detection device (5) via yarn guides α( )teeth.

After passing through the tension plate (6) and being hung on the unused amount detection roller Q], the tension plate o4. After passing through the thread guide, it is sent to the sewing machine.

Appropriate tension is applied to the thread (6) hung on the unused amount detection roller 03 by the very weak pressing force of the tension plates α4 and Q4, and this also causes the thread (6)
) When the light shielding plate (4-c) of
1 is prevented from being reversed.

When the thread (6) is fed out toward the sewing machine due to thread consumption due to the operation of the sewing machine, the unused amount detection roller (c) rotates and is attached to the roller shaft αη supported by the bearing α. A light-shielding plate α, which is a circular plate with multiple slits, rotates inside the photoelectric sensor α, which has a light emitting part and a light receiving part as a pair, and a signal that is the basis for measuring yarn consumption is generated. The yarn consumption amount is inputted to the word calculation device (c) shown in FIG. 5 and measured.

Next, a color change signal is generated to the dyeing device at a desired time based on the calculated 'i'' Lfc yarn consumption using the method described above to automatically change the color of the dyed yarn. This color changing method will be explained based on FIG. 4.

First, the distance from the coloring material application surface of the coloring material applicator (1-a) of the dyeing device (1) to the needle tip of the sewing machine is measured, and the value S is obtained.

For example, to explain the case of sewing alphabetical characters such as A, B%C, etc. while changing colors one after another, first, the sewing pattern data and color data are stored in the storage device, and the first From point AOa1 of the sewing pattern to a2...ak, the thread length on the needle coordinates t=alag+alas+...2 is calculated and stored.

Next, when the actual sewing work starts, the thread consumption is detected by the thread consumption detection device (5), and this detection signal is input to the calculation device to calculate the actual thread consumption for 1 minute. The ratio α=Ll with the measured and stored calculated value t is calculated, and based on this value, the needle drop point for generating a color change signal to the dyeing device is determined as follows.

Using the needle drop point where you wish to change the needle thread color of the sewing pattern as a gradient, calculate the calculated thread length L-Zl au + au au-1"-" from 11 points each time you go back one stitch based on this point. The value αL=hi multiplied by the value α set earlier is compared with S in the 11th order, and L=xli+au au-1+...am+a
If you set the needle drop point a□ such that mBαL≧S, there will be no error at all, and if a color change signal is sent to the dyeing device IC at one point, the color change on the sewing pattern will occur exactly at the needle drop point xl. It will be carried out.

However, in reality, an error occurs, so it is necessary to correct this error and make sure to sew up to point 11 with the thread of the previous color.At the end of the length, the thread is sewn a few stitches ahead of point a□. A color change signal is issued to the dyeing device at the drop point ap, and the number of stitches to be sewn from this 8 m point is determined and memorized as appropriate based on experiments.

Therefore, the sewing operation by the sewing machine is temporarily stopped when the sewing progresses from the 81st point to the sister start shear a1 point, and after a color change signal is generated to the dyeing device, the sewing operation is started again and the sewing operation is continued at the 51st point 1.

As mentioned above, the color change signal to the dyeing device is sent with a delay of several stitches to account for errors, so when the sewing progresses to zIA, the chromaticity has not yet changed and the thread of the previous color (in this case A Since there is some remaining thread (thread of the color from which pattern B was sewn), it is not possible to immediately move on to sewing the next pattern B, and it is necessary to dispose of the remaining thread (waste thread).

In order to dispose of this discarded thread, it is sewn into the close-stitched part of the straddling pattern as an understitch, but here we will explain the case where it is sewn into the next pattern B, and the sewing progresses to the sf point. After that, ``2 + ``S +''
41 z5・・・・・・・・・Proceed to sew ZJ and pattern B, and after the thread of the previous color finishes at these 73 points, continue sewing further with the thread that has changed to the color used to sew pattern B πn 1 +
Continue sewing with Thn and finish sewing as a straight stitch.
Start sewing letter B starting from bt, measure the thread consumption up to point bk in the same way as pattern A, and start sewing the next pattern C.
Determine the coefficient α that is the basis for generating the color change signal for the staining device.

If you sew pattern C next to B with thread of the same color as B, there is no need to sew the stitches under the letter C, and 3'l
l 7! l'! ? r cl l cg...
...and I will continue sewing.

The above-mentioned control of the waste thread stitching due to the thread color change can be easily performed by the control means Q) based on the pattern data and color data stored in the storage device shown in FIG.

In addition, in the above example, the coefficient α that corrects the yarn consumption amount for each pattern is
However, as another example, if each pattern is on the same scale (no enlargement or reduction has been performed), the α obtained for the first pattern is unchanged for subsequent patterns. When the pattern is enlarged or reduced, the correction coefficient α determined for the first pattern and the coefficient of the size of the pattern can be determined. There is also a method of determining a point to generate a color change signal for the staining device by using the product αJ with α.

The control mechanism of the dyeing sewing machine having the above-mentioned thread consumption measuring means is shown in a block diagram as shown in FIG. Based on the calculation process <cpu@1, a color change signal is issued to the dyeing device, and the color change motor and color material application solenoid are driven.

Furthermore, control regarding sewing in the discarded thread resulting from the color change as basting stitching into the close-stitched portion is also performed by the CPU 12 based on data stored in the storage device.

Fig. 6 is a flowchart showing the processing steps for issuing a color change signal to the dyeing apparatus, and it is believed that the above-mentioned matters will be better understood by this.

(Effects) As described above, the present invention corrects the occurrence of color change for the dyeing device in the dyeing sewing machine based on the thread consumption measured by actual sewing on the sewing machine, so it is extremely effective. This can be carried out properly, and as a result, there is absolutely no shortage of yarn of a predetermined color, and even when changing colors, a large amount of waste yarn is not generated.

Further, even when enlarging or reducing a sewing pattern, the thread consumption can be accurately estimated and a color change signal can be issued to the dyeing device at an appropriate time.

Furthermore, the present invention automatically disposes of the waste thread generated by changing the five colors by sewing it into the close stitches in the pattern as understitching, so there is no need to dispose of the thread.

As mentioned above, the present invention makes it possible to automatically and smoothly change colors in dyeing equipment and dispose of waste yarn generated due to color changes, thereby creating a highly practical dyed sewing machine. will be provided.

[Brief explanation of the drawing]

FIG. 1 is a front view of the dyeing sewing machine of the present invention excluding the sewing machine part;
Figures 2 and 3 are diagrams showing the yarn consumption amount detection device #, Figure 4 is a diagram explaining the color change (number a generation process), Figure 5 is a block diagram showing the control mechanism, and Figure 6 is the color It is a flowchart showing a change signal generation process, (5)... Thread consumption 凇detecting device, 斡...
Storage device, Q controller...CPU. Patent applicant: Janome Sewing Machine Industry Co., Ltd. Inventor: Yasushi Eguchi

Claims (2)

[Claims] (1) In a dyeing sewing machine equipped with a dyeing device disposed close to the sewing machine and selectively dyeing the thread with one of a plurality of colors while supplying the upper thread to the sewing machine, the dyeing sewing machine A dyeing sewing machine comprising a consumption measuring means and a color change signal generating means for generating a color change signal in a dyeing device based on the result of measuring the needle thread consumption. (2) In the dyed sewing machine described in item m1, control is performed to perform waste stitching as an understitch in the close stitching part of the sewing pattern as a disposal of the waste part that occurs when the color of the thread is changed by the dyeing device. Dyeing machine with means ″0