JPS6059340B2 - Two-color pattern reading control device for tufting machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a two-color pattern reading control device in a tufting machine that can produce two-color patterns using two drums.

To display a pattern on a carpet due to the color change of two colored threads, as shown in Figure 1, according to the original drawing, one colored thread 11 is made into a high loop and the other colored thread 12 is made into a low loop. 11 was created by hiding the thread 12 of the low loop color so that the color of the high loop thread 11 could be seen as a whole.

Therefore, in the past, red and yellow threads were alternately terminated on the needle of the tufting machine, and the original picture had a black and white pattern as shown in Figure 2, and the odd numbered rows, red thread, and even numbered rows of the original picture were displayed. The white part of the original picture was set to high loop and the black part to low loop, and the two-color pattern was reproduced on the carpet by changing the high and low of the red thread and yellow thread. A typical original image reading device has 60 to 252 optical sensing heads.
Since the pieces are lined up in a row and the reading width is narrow, the white and black coloring of the original must be done accurately.
Normally, the black part is created by accurately filling in the black part with a width of 4Tfl1R, or by applying black tape, and it takes a lot of manual labor to create the original image, regardless of whether it is a simple figure like a circle or a somewhat complex figure. It took time.

Also, because the black and white patterns of the high and low threads of two colors were drawn on a single original picture, it was difficult to imagine the finished pattern of the carpet, and if you were not used to it, the design of the original picture was very difficult.

The present inventor conducted research in view of the above-mentioned shortcomings regarding the reading of two-color patterns using a tufting machine, and as a result, as shown in Figure 3 a and b, the inventor created an original image for each color by painting it black and white, and then read it from now on. We discovered that by electrically synthesizing signals, it is extremely easy to create original images, and that even complex designs can be created relatively easily and accurately. A reading control device has been developed and proposed here.

Hereinafter, the configuration will be explained in detail based on an embodiment of the present invention shown in FIG.

In the figure, reference numerals 1a and lb are groups of optical sensing heads that read the original black and white pattern and convert it into electrical signals, and 252 heads from No. 1 head to No. 252 head are provided in a row.

1a is the original drawing for odd-numbered optical sensing heads in FIG. 3a;
Reference numeral 1b is for reading the black and white pattern of the original image for the even-numbered optical sensing head shown in FIG. 3b. The read signals from the optical sensing head groups 1a and 1b are each N
O. No. from l head. 63 head, NO. NO.64 head. l26 head, NO. NO from l27 head
．． l89 head, NO. No. from l9O head. 252
The heads are divided into four groups, I, ■, ■, ■, and each has parallel input/serial output converters 2a, 2b, 2c, and 2d.
and 2a'', 2b'', 2C'', and 2d''. Further, the read signal converted into series by this parallel input/serial output converter is sent to the selection circuit 3a as shown in the figure.
, 3b, 3c, 3d and 3a'', 3b'', 3C'', 3d
The selection circuits 3a and 3a'' receive the I group read signal, 3b and 3b'' the ■ group, 3c and 3C'' the ■ group, and 3d and 3d''.
Then ■You can select each group.
Furthermore, these selection circuits 3a, 3b, 3c, 3d and 3a''
, 3b'', 3C'', 3d'' are serial input/parallel output converters 4a, 4b, 4c, 4d and 4a'', 4b'', 4
As shown in the figure, input is made to C'' and 4d'' from the right side. In addition, 5 in the figure is a flip-flop, which inputs the clock pulse X from the clock pulse converter 6 and the light emitting diode drive pulse Y from the light emitting diode drive pulse oscillator 7, and inverts the outputs Q and Q'' at predetermined intervals. The output Q is connected to the selection circuits 3b, 3d, 3a'' and 3C'', and the output Q'' is connected to the selection circuits 3a, 3c, 3b'', 3C''.
The clock pulses X1 and the light emitting diode drive pulses Y are sent to the parallel input/serial output converters 2a, 2b, 2c, 2d and 2a'', respectively.
2b'', 2C'', 2d''.Then, the serial input/parallel output converters 4a, 4b, 4c, 4d and 4
252 from a'', 4b'', 4C'', 4d'' respectively.
Original image reading signals are output. This invention has the above-mentioned configuration, in which the optical sensing head group 1a reads the original image for odd-numbered optical sensing heads shown in FIG. 3a, and the optical sensing head group 1b reads the original image for even-numbered optical sensing heads shown in FIG. 3b. The black and white patterns of the original image are read all at once and intermittently every time the light emitting diode driving pulse is sent, and the reading signals of the reading heads with the smallest numbers are output in series according to the clock pulses, and are output to the selection circuit. 3a, 3b, 3c, 3d and 3a″, 3b″
, 3C'', 3d''.

Then, as preset, the selection circuit 3a
, 3a'' are the read signals of the I group, 3b, 3b''
Then, ■group, 3c, 3C'', ■group, 3
In d and 3d'', select the ■group respectively.On the other hand,
A light emitting diode drive pulse Y and a clock pulse X are sent to the flip-flop 5, and the flip-flop 5 causes the clock pulse
is divided by 112, and is reset by the light emitting diode driving pulse Y, and the output Q of the flip-flop 5 is
, Q'' have the waveforms as shown in the graph below.In other words, when looking at the output Q, the first clock pulse is at high level, the second is at low level, and the third is at high level. The first clock pulse is at low level, the second is at high level, and the third is at low level.Q
, Q'' repeats high and low reversals with one phase shift.

Each selection circuit is designed to block passage of the read signal when the output of Q or Q'' is high level, and to pass the read signal when the output is low level.Therefore, parallel input/serial output conversion is performed. Containers 2a, 2b, 2c, 2d and 2a
When a read signal is sent from ``, 2b'', 2C'', and 2d'' to each selection circuit 3 according to the clock pulse, at the first clock pulse, the output Q'' becomes a low level as described above. Therefore, the read signal sent to the selection circuits 3a and 3c by the first clock panorez passes through as is, and the read signal sent by the second clock pulse causes the output Q'' to be inverted to high level. Because of this, passage is blocked. In this way, the selection circuits 2a and 2c to which the output Q'' is sent pass only the odd-numbered signals, and block the passage of other even-numbered signals. Looking at the selection circuits 3b and 3d to which the output Q of No. 5 is sent, the output Q is at a high level when the read signal is sent by the first clock pulse. The passage of the read signal of the NO.64 head, NO, and 19O head sent by the clock pulse is blocked, and when the second clock pulse is output, the output Q is inverted to low level, so the NO.65 The read signal of the head, No. 19l head passes through.In this way, the selection circuits 3a and 3c pass the read signal sent in the odd numbered position to the selection circuits 3b and 3c.
3d allows even-numbered read signals sent to pass therethrough. Therefore, as a whole, each selection circuit 3a, 3b
, 3c, 3d, the odd numbered read head, ie NO. l head, NO. 3 heads, NO. 5 heads
...NO. The read signal of the 25l head will be sent to serial input/parallel output converters 4a, 4b, 4c, 4d. On the other hand, looking at the read signal of the original image for the even-numbered optical sensing head, the output Q of the flip-flop 5 is
is sent to the selection circuits 3a'', 3C'', and the output Q is B
Since the clock pulse is at a high level when the first clock pulse is issued, the selection circuits 3a'', 3C'' block passage of odd-numbered read signals, and allow only even-numbered read signals to pass.

In addition, in the selection circuits 3b'' and 3d'', this is reversed, so only the odd-numbered read signals are passed through. Therefore, for originals for even-numbered optical sensing heads, the even-numbered reading head NO. 2 heads, NO. 4 heads...
NO. The read signals of the 252 heads will be sent to serial input/parallel output converters 4a'', 4b'', 4C'', 4d''.

The read signals sent to each serial input/parallel output converter 4 are input to the right side, that is, in the order in which they are read, converted into parallel signals, and output as read signals for two-color patterns. As explained above, the selection circuits 3a, 3b, 3c,
3d allows only the reading signals from the odd-numbered optical sensing heads to pass through, and 3a'', 3b'', 3C'', and 3d'' only allows the reading signals from the even-numbered optical sensing heads to pass through, so the original image in Figure 3a is passed through the red thread. If the original picture in Fig. 3b is for yellow thread, then serial input/parallel output converters 4a, 4b, 4c, 4d
By controlling the thread feeding device of the tufting machine in accordance with the read signals from 4a'', 4b'', 4C'', and 4d'', a two-color pattern can be reproduced on the carpet.

Note that this read signal Xl, X2...X25
To control the tufting machine by 2 and Yl, Y2, . Therefore, X1 is a signal corresponding to the black and white pattern of the original image, and Y1 is a low level signal due to the selection circuit 3a'' being closed, so these are the high and low signals of X1, and the corresponding thread of the tufting machine. The thread feeding device is controlled by X2 and Y2, and since X2 is an even number, it becomes a low level, and Y2 outputs a signal corresponding to the black and white pattern of the original image, so the high and low signals of Y2 control the thread feeding device. All you have to do is control it.

The method for controlling the yarn feed amount differs depending on the type of yarn feed device, but in general, as shown in Figure 5, the yarn feed amount necessary to perform high pile height tufting is controlled. A signal E for obtaining the required yarn feed amount and a signal F for obtaining the yarn feed amount necessary for performing low pile height tufting are generated in advance, and these signals are led to the selection circuit 201 to generate read signals XlYl, X2Y2, X3Y3, .・・・
・You can select them one after another according to the pattern of the original picture.
Note that when the drive source of the yarn feeding device is a pulse motor, the signals E and F are pulses for driving the pulse motor, respectively, generated by an oscillator. In the case of the yarn feeding device shown in FIG. 6, the output signal generated by the yarn feeding amount control signal generating device shown in FIG. 7 is used.

To explain the yarn feeding device shown in FIG. 6 below, a small gear 102 is mounted on a shaft 101 rotating at a high speed, and a small gear 104 having the same diameter as the small gear 102 is mounted on a shaft 103 rotating at a low speed. The shafts are mounted so that they rotate in the same direction.

Further, the small diameter gears 102 and 104 mesh with separate large diameter operating gears 105 and 106, respectively, so as to constantly rotate them in the same direction. Furthermore, this working gear 1
A single operating shaft 107 passes through the operating shaft 107 and the operating gear 105, and a one-way clutch 108 is installed between the operating shaft 107 and the operating gear 105, and a one-way clutch 109 is installed between the operating gear 106 and the operating gear 106. They seem to cock in opposite directions. Further, the operating gear 105
and 106, the operating shaft 107 has a shaft 10
A DC servo motor 110 that rotates at a higher speed than 1 is provided,
It is designed so that forward and reverse torque can be transmitted to the operating shaft 107. Then, when a positive direction δ current is applied to this DC servo motor 110 to generate a positive torque, the coupling between the operating gear 106 and the operating shaft 107 is separated by the clutch 109, and the operating gear 106 idles, causing the operating The shaft 107 receives only the rotation of the shaft 101 and rotates in the direction of arrow A, and the yarn feed drum 13 rotates via the drive gear 111 and the driven gear 112.

Furthermore, when a current is applied in the opposite direction to the DC servo motor 110 to generate torque in the opposite direction, the actuating shaft 107 is disconnected from the actuating gear 105 by the one-way clutch 108, and the actuating gear 105 is disconnected by the other one-way clutch 109.
06 and is in a locked state, and the rotational force of the shaft 103 is transmitted to the yarn feed drum 113.

Therefore, by changing the direction of the torque of the servo motor 110, the rotation of the yarn feed drum can be changed to two stages of high speed and low speed, and the rotation of the yarn feed drum can be changed to two stages of high speed and low speed during the yarn feeding time of one pile height. By changing the yarn feed amount, it is possible to freely adjust the yarn feed amount and obtain an arbitrary pile height. Next, the pile height control signal generator shown in FIG. 7 generates a signal that controls the direction of torque of the DC servo motor 110 of the yarn feeding device, and as shown in the figure, the pile height control signal generator generates a signal that controls the direction of torque of the DC servo motor 110 of the yarn feeding device. A pulse encoder 401 that generates 60 @ pulses and 1 pulse, a frequency divider 402 that divides the 600 pulses into 1110, and
Digital switch 404 that allows you to arbitrarily set numerical values up to
a, 404b1 Counters 403a, 403 connected in parallel to the pulse encoder in order to subtract the set value of the digital switch 404 by the 60 pulses.
b, the output sent from this counter 403, and the flip-flop 40 whose output is inverted by the pulse of 1 pulse/rotation sent from the pulse encoder.
5a, 405b, and a selection circuit 506 for selecting only one of the output signals E, F from each flip-flop 405, and the digital switch 40
If you set any value between 0 and 60 for 4,
Each counter 4Q3 subtracts the value, and when the subtracted value becomes zero, a trigger pulse is sent to the flip-flop 405 to invert the output of the flip-flop 404. As a result, output signals E and F are obtained which repeatedly change the high and low levels of the output from the flip-flop 405 with each rotation of the main shaft of the tufting machine as a cycle, and these are sent to the selection circuit 506, and one of these is selected as the original image. The read signals XlYl, X2Y2, . . . are outputted by the present invention and are selected according to the pattern of
are respectively sent to the selection circuit 506 and used for selecting the outputs E and F. Then, the selection circuit 50
The output E or F selected by the read signal XlYl, X2Y2, . It is used to feed the yarn to obtain the desired pile hide.

This invention has the above-mentioned configuration and operation, and can read the original image for each color when reproducing a two-color pattern on a carpet, making it extremely easy and accurate to create an original image. It has excellent effects. Further, the read signal outputted by the present invention has the versatility of being able to control yarn feeding devices of tufting machines of various shapes.

[Brief explanation of the drawing]

Fig. 1 is a vertical cross-sectional view of a carpet showing the principle of pattern creation by color change in a two-color patterned carpet, Fig. 2 is a plan view of a conventional original drawing for a two-color patterned carpet, and Figs. 3A and b are the invention of the present invention. FIG. 4 is a block diagram of the two-color pattern reading control device according to the present invention, and FIG. A block diagram of a circuit for controlling the feeding device, FIG. 6 is a perspective view of an example of the yarn feeding device, and FIG. 7 is a block diagram of a pile height control signal generator for controlling the yarn feeding device shown in FIG. 6. be. Further, in the figure, 1a and 1b are optical sensing head groups, 2 is a parallel input/serial output converter, 3 is a selection circuit, 4 is a serial input/parallel output converter, and 5 is a flip-flop.

Claims (1)

[Claims] 1. Two sets of optical sensing head groups 1a and 1b that read patterns drawn in different colors on two original images, a parallel input/serial output converter that converts the read signals into series, and a read signal that is converted into serial. A selection circuit that inputs a signal and passes only the odd-numbered input signal according to the signal from the flip-flop 5, a selection circuit that passes only the even-numbered input signal, and the output from the selection circuit are connected in parallel. A two-color pattern reading control device consisting of a serial input/parallel output converter that converts into