JPS5940937B2 - Knitting machine needle selection control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a knitting machine capable of pattern knitting, and more particularly to a needle selection control device for pattern knitting.

In conventional knitting machines, the knitting machine is equipped with a readable/writable storage device (RAM: random access memory) and a card reader, and cards are loaded into this storage device before knitting work, and the card is read into this storage device before knitting work. There is a device that automatically reads pattern signals from a storage device as the carriage moves and automatically selects needles based on the signals (U.S. Pat. No. 3,983).
, No. 718, Class 66/75A of 1976).

In addition, pattern signals are stored in advance in a read-only storage device (ROM: read-only memory), and a pattern reading program is specified by button operation, and the pattern signals are read out according to the program as the carriage moves. There is one that reads out the signal and automatically selects the needle based on that signal.

In any of these knitting machines, in order to sequentially read patterns from a storage device in response to movement of the carriage, means for detecting the carriage position, a digital code generator for expressing the carriage position as a digital signal, and a carriage The readout address of the storage capacity is determined according to the position of the carriage using a composition stage code generator, etc. that expresses the number of stages to be constructed using a digital code signal, but even if the pattern is relatively simple, each Storing needle selection information for knitting needles: It is necessary to store this information in the device, and the storage device requires a considerable storage capacity.

The present invention provides a needle selection control device for a knitting machine as described above.
When making it possible to set only relatively simple patterns, the storage device can be omitted, and when making it possible to set complex or various patterns, the capacity of the storage device can be reduced by sharing the simple patterns. The purpose is to provide a needle selection control device.

In order to achieve the above object, in the present invention, a needle selection signal is created by combining a digital signal representing the carriage position and a digital signal representing the number of formation stages of the carriage using a logical operation circuit.

Since all digital signals have regularity, by combining them, the output binary signal of the logic operation circuit is determined to be either high or low for any position on the carriage, and the regularity also changes depending on the carriage position. Because there will be a certain change,
The binarized signal can be applied to a needle selection system as a needle selection signal and used for regular pattern knitting.

Therefore, in a knitting machine that only sets simple patterns, a memory device is not required, and various regularities can be achieved by changing the wiring of the logic elements in the logic operation circuit and/or switching between multiple sets of logic operation circuits with different logics. It is possible to create a pattern with a certain pattern.

Also, when using a storage device with a logic operation circuit,
Needle selection signals for regular pattern stitches are obtained from the logical operation circuit, and needle selection signals for other irregular or regular pattern stitches are obtained from the storage device, thereby effectively reducing the capacity of the storage device. In addition, the peripheral circuit or program for reading the data can be simplified.

FIG. 1 shows the main configuration of an embodiment of the present invention in block form.

In Fig. 1, 1 indicates the needle selection mechanism section, 2 indicates the needle selection control section, the dotted line indicates the mechanical action path, the solid arrow indicates the direction in which the electric signal is applied, and the thick arrow indicates the data bus. show.

The needle selection mechanism section 1 energizes switches 18 and 19 when the knitting needles 4 are pressed down by movement of the carriage.

By energizing this switch, a signal representing the block and the number within the block of the pressed knitting needle 4b is given to the needle selection control section 2.

This signal is also indicative of carriage position.

The needle selection control unit 2 detects the lowering of the knitting needles 4 and the movement direction of the carriage based on the signals, creates a digital signal representing the carriage position and a digital signal representing the number of knitting stages, and selects from a combination of these signals. A needle signal is created and applied to the electromagnet 23 of the needle selection mechanism section 1.

The knitting needles are restrained by the biasing of the electromagnet 23, and the needles are selected by this restraint.

In this way, in the needle selection mechanism section 1, the needle selection control section 2 gives the address of the knitting needles under the carriage, that is, the carriage position address, and the needle selection control section 2 gives the needle selection signal corresponding to that address to the needle selection mechanism section 1. .

Each part shown in FIG. 1 will be explained in detail below.

First, the needle selection mechanism section 1 will be explained with reference to FIGS. 2 to 7. The knitting needles 4 arranged in rows on the needle bed 3 are
When the lowering cam 7 of the carriage 6 rides on the butt part 4b of the knitting needle 4, the leaf spring 5 is bent, and the needle tail end 4a is lowered as shown by the solid line in FIG.

A plurality of needle selection plates 8 and index plates 9 are arranged perpendicularly to the knitting needles 4 at positions where they engage with the needle tail ends 4a when the needles are rolled down.
are arranged side by side, and each of the second plates 8 and 9 has a length corresponding to the length of the knitting needles 4 arranged in rows along the longitudinal direction of the needle bed 3,
Alternatively, the index plate 9 has a length corresponding to each binary encoded role, which will be described later.

The needle selection plate 8 is provided with cam portions 10 at predetermined intervals on the upper edge of each plate, and the number of the plates is determined by dividing the total number of knitting needles 4 into blocks for a predetermined number, and selecting the needles of the divided blocks. The predetermined spacing of the cam portions 10 is such that each knitting needle in the same order of each block corresponds to the cam portion of each needle selection plate 8 in parallel, as shown in FIG. , adjacent knitting needles 4
The cam portions 10 of adjacent needle selection plates 8 are arranged so as to be regularly shifted from each other.

However, in this relationship of mismatch, the spatial arrangement of adjacent knitting needles 4 and actually adjacent needle selection plates 8 does not necessarily have to be an arrangement in which the cam parts 10 are linearly shifted, and the control operation It is good as long as it is in order.

Each needle selection plate 8 is biased to one side by a spring 11,
When the needle tail end 4a is lowered, the needle tail end 4a engages with the cam groove 10a of the cam portion 10, and the needle selection plate 8 is displaced by the cam action in a direction against the spring 11.

FIG. 3 illustrates the operational relationship between the knitting needles 4 and the cam portion 10 at this time.

The movement of the knitting needles 4 under pressure by the reduction cam 7 is thus transmitted as a displacement movement of each needle selection plate 8.
When the knitting needles 4 are not restrained by any means, the knitting needles 4 are returned upward by the leaf springs 5 as the lowering cam 7 passes, and the needle selection plate 8 is returned to the previous position by the springs 11.

When the needle selection plate is restrained as it is in the state of displacement, the needle tail end 4a is moved by the cam groove 10a as shown in FIG.
The knitting needle 4 is gripped and held under pressure in two ways.
By the action of the needle selection cam 12 accompanied by the reduction cam 7, the needle selection positions are assigned to the front and back as usual, as schematically shown in the upper left part of FIG.

In this embodiment, each of the eight knitting needles 4 is designated as a -block, and is applied to the eight needle selection plates 8 sequentially and overlappingly in parallel for each block. Therefore, the total number of needles is 200. In the case of a book, each needle selection plate 8 is provided with 25 cam portions 10.

On the other hand, there are five index plates 9, and as mentioned above, each of the five index plates 9 plays the role of binary encoding, and each one corresponds to one digit of the binary number. They are arranged accordingly.

In other words, this corresponds to each of the 25 knitting needle blocks divided into 5-digit binary numbers, as shown in the middle partial view and lower schematic diagram of Figure 5. , a sawtooth cam 13 is provided at a position that repeatedly corresponds to each block in the order in which they are lined up on the first index plate.

The sawtooth cams 13 are arranged in parallel according to the names in the corresponding blocks, and when the knitting needle tail end 4a descends along the oblique side of the sawtooth cams 13, the index plate 9 is displaced laterally by the cam action. This provides an action in a direction that opposes the force of a spring, not shown in this figure, which biases in the direction of the arrow in FIG.

Even if the knitting needles 4 in the corresponding block are rolled down, the same displacement action is given, and the rolling down cam 7 always rolls down about three knitting needles 4 at the same time. As long as the lowering cam 7 is present, the index plate 9 corresponding to the hook responds so as to continue to maintain its displaced state.

Hereinafter, on the second index plate 2, sawtooth cams 13 are provided successively corresponding to the second and third needle blocks, and then two blocks are spaced apart, and the second block is provided with sawtooth cams 13. The third index plate is provided with sawtooth cams 13 corresponding to the fourth to seventh needle blocks, and the spacing between each of the four needle blocks is 4 on the 4th index plate corresponds to the number of blocks starting from the 8th needle block and going to 8.
Each of the K1-5 index plates 9 is provided with a sawtooth cam 13, arranged in the relationship shown schematically at the bottom of FIG.

The correspondence relationship between each plate and the needle block can be said to be that the five index plates 9 correspond to the binary relationship to the needle block expressed in decimal notation. Knowing the combination of displacement movements of each plate in 5,
It is possible to know on which needle block the lowering cam 7 is located.

Each of the needle selection plate 8 and the index plate 9 can be displaced through the cam action caused by the knitting needle pressure of each plate due to engagement between the hook-shaped groove 14 formed in each plate and the support rod 15. The pin 16 and the slot 17 are supported as shown in FIG.
The amount of displacement is regulated by engagement with.

Each board is configured to be detected one by one.

For example, as shown in FIG. 6, this means controls the movement of each combined plate by actuators 20.1 of each switch 18.19.
21, it converts the presence or absence of movement into an open/close signal for the electric circuit, like a so-called limit switch, and in this case,
Each actuator 20 is attached to each plate that is not in a combination correspondence relationship.
．． A window 22 is provided to allow the windows 21 to pass through as they are and to make them unrelated to each other.

In the embodiment shown in FIGS. 5 and 6, the directions of displacement of the needle selection plate 8 and the index plate 9 due to the pressure applied by the knitting needles 4 are opposite to each other, and the needle selection plate 8 The switch 18 for detecting the displacement of the index plate 9 and the switch 19 for detecting the displacement of the index plate 9 are set such that the sensing directions of both actuators 20 and 21 are opposite to each other.

The relationship between the displacement actuation amount of each plate and the response timing of the detection switches 18 and 19 is set so that displacement detection signals for about three knitting needles 4 that are simultaneously rolled down by the rolling down cam 7 are always aligned.

As described above, the eight needle selection plates 8 and the five index plates 9 are each equipped with means for converting the pressure of the corresponding knitting needles 4 into electrical signals using the cam portion 10 and the sawtooth cam 13. A total of 13 electrical signals serve as input signals to the needle selection control section 2 in FIG.

The displacement detection signal of the needle selection plate 8 is calculated by the control circuit 2, and based on the calculation output, the needle selection plate 8 is selectively subjected to restraint control to remain in the displaced state.

As a means for this purpose, for example, as shown in FIG. 7, electromagnets 23 are arranged in one-to-one correspondence with each needle selection plate 8, and the mutual movements of the respective needle selection plates 8 are linked by one operating rod 24.

FIG. 7 (As illustrated in this example, the actuating rod 24 is swingable about the fulcrum hole 26 passing through the pivot plate 25, and each of the
The blade end is engaged with the engagement hole 27 of the needle selection plate 8, and the other end is engaged with the head hole 29 of the plunger 28 of the electromagnet 23, and the movement in the longitudinal direction is caused by the movement between the electromagnet support plate 30 and the front of the needle selection plate. It is regulated by the plate 31.

In addition, all of the needle selection plate 8 and index plate 9 and the operating rod 24, which are not in a corresponding relationship, are similarly unrelated to each other through a window 32.
are provided on each plate side, and the actuating rod 24 passes through them so that they do not engage with each other.

In Fig. 7, the corresponding needle selection plate 8 corresponds to the electromagnet 23 on the left side.
shows the state in which the plunger 28 enters the inside of the electromagnet due to the displacement operation, and the one on the right shows the state in which the needle selection plate is not activated and the plunger 28 is exposed at a fixed amount.

Therefore, when the electromagnet 23 in the state on the left side of the figure is excited by the calculation output of the control circuit 2, the plunger 28 is fixedly held in the internal state by the magnetic force, and while the electromagnet continues to be excited, the corresponding needle selection plate is As mentioned above, the knitting needles held in the position under pressure by the needle selection plate 8 while being restrained are subjected to the needle selection action by the needle selection cam 120. It is as follows.

The configuration of the needle selection mechanism section 1 shown in the left half of FIG. 1 and the operation of each part thereof have been explained above.

Next, the needle selection control section 2 will be explained in detail.

The needle selection control unit 2 determines the position of the knitting needle 4 being pressed down by the pressing down cam 7 of the carriage, that is, the carriage position, from the displacement states of 1 to 5 on the index plate and the displacement states of the needle selection plates G1 to G8. In addition to detecting with a binary code, as described later, the number of knitting stages is detected and expressed in a binary code, and these binary codes are added to a logic circuit to create a needle selection signal that is uniquely determined from the carriage position and the number of knitting stages. and is applied to the electromagnet 23 of the needle selection mechanism section 1.

As shown in FIG. 1, the needle selection control section 2 includes a pulse shaping circuit 3.
3. A knitting needle number converter 34 that generates the block number of the knitting needles 4b that have been rolled down as a binary code, a knitting needle block detector 35 that generates the block number as a binary code, and a knitting stage of the carriage as a binary code. Knitting stage detector 36, direction discriminator 37 that detects the moving direction of the carriage, roll down detector 38 that detects the rolling down of knitting needles 4, release time detector 39 that releases the rolling knitting needle restriction for needle selection, knitting needle number conversion A pattern logic circuit 47 generates a binary signal determined by the combination logic of the binary code of the knitting block detector 34, the knitting stage detector 36, and the binary code of the knitting stage detector 36. It is comprised of a needle calculator 48 and an output amplifier 54 that amplifies the needle selection signal to an electromagnet energizing level.

The output binary code of the knitting needle number converter 34 represents the knitting needle number within the block, and by combining this with the output binary code of the knitting needle block detector 35, it represents the number of the knitting needles among all knitting needles of the knitting needle that has been pressed down. You will get a code.

Therefore, in this embodiment, the knitting needle number converter 34 and the knitting needle block detector 35 constitute the position code generator of the present invention, the knitting row detector 36 is a knitting row code generator, and the pattern logic circuit 47 is a binary knitting row code generator. This is a logic operation means that generates a signal as a needle selection signal.

The configuration of each part of the needle selection control section 2 shown in FIG. 1 is explained in detail in Section 8.
The configuration and operation of each part will be explained with reference to FIG.

In addition, in FIG. 8, an input signal (hereinafter referred to as a pattern plate signal) from the needle selection plate displacement detection switch 18 is shown.

) are represented as they are as GS1 to GS8, and each of them converted into a pulse signal via the pulse shaping circuit 33 in FIG. 1 is represented as each GM1 to GM8.
The drawing of the pulse shaping circuit 33 is omitted in the figure.

The pulse shaping circuit 33 is a monostable multi-bi break (8
), and the generated pulse width is
The switch 1 caused by the subsequent knitting needle pressure by the pressure cam 7 when the needle is moved at the normally expected maximum speed
The multi-by-break output pulses for the signals GS1 to GS8 from 8 (8fll) are set to short widths that do not overlap with each other.

The knitting needle number converter 34 has a circuit configuration generally called an encoder, and converts the decimal signals GMI to GM8 into a 3-bit binary code and supplies it to the pattern logic circuit 47.

Both the knitting needle block detector 35 and the knitting stage detector 36 are constructed of integrated circuits, and are similar to a circuit generally called an up/down counter.

The knitting needle block detector 35 counts the index signals IS1 to IS5 of the switches 19 (5 pieces) and provides a 5-bit binary code to the pattern logic circuit 47.

The formation stage detector 36 has three input terminals, and the reset signal Ro from the release timing detector 39 is connected to the up-count input terminal UP.

This reset signal R6 is generated every time one stage of knitting is completed, and is used to advance the count.

The remaining two inputs are commanded by means such as a manually operated switch (not shown), and as mentioned above, the formation stage detector 36 is an up/down counter, that is, an up/down counter is input to the up count input terminal described above. signal, and these two manual inputs are the down count input terminal (DOWN>
and the start input terminal, the former gives repeated commands such as returning only one stage or canceling up, and the latter returns (resets) the initial formation start stage advance.
This command is obtained by resetting the counter of the formation stage detector 36.

These knitting needle number converter 34 and knitting needle block inspection mountain valley 35
and the output 2 of the formation stage detector 36
The hexadecimal code is input to the pattern logic circuit 47.

The direction determination circuit 37 detects the arrival order of signals GS1 to GS8 representing the needle numbers in the block in the form of 10, determines the moving direction of the carriage 6, and adds (up) the signals to the knitting needle block detector 35 for each left and right movement. ) signal and a subtraction (down) signal selectively.

As a result, the output binary code of the knitting needle block detector 35 always represents the block number in which the carriage 6 is located even if the moving direction of the carriage 6 changes alternately.

To explain this in detail, if the knitting needles are arranged from right to left in order from 1 to 8 in each block, then at the boundary between blocks, the shift in the positive pressure order from the 8th needle to the 1st needle is This means that the carriage moves to the left, and in order to know the order of transition, a set-reset type flip-flop 44 is provided as a gate control element on one of the AND inputs.
After giving a reset with the signal GM7 of the 8th needle, set it with the signal GM8 of the 8th needle to open the AND gate, and in that state, AND with the signal GM1 of the 1st needle of the adjacent block.
The output provides an address switching signal to the left side of the output corresponding to leftward movement to the knitting needle block detector 35.

Similarly, the flip-flop 46 provided at one input end of the AND element 45 is first reset with the second needle signal GM2, then set with the first needle signal GMI, and the AND element 4
When the AND output with the No. 8 needle signal GM8 is generated in the gate open state of No. 5, this is applied to the right switching input terminal of the knitting needle block detector 35 as an address switching signal corresponding to rightward movement.

The reset terminals of the left and right flip-flops 44 and 46 each receive a reset signal R8 when the carriage comes out of the narrow width, and a reset signal GM? for each one stitch earlier. , GM2
The inputs are connected at each logical sum.

The rolling down detector 38 receives index signals IS1 to IS given to the knitting needle block detector 35 as count pulses.
5, it commands the input timing.

This pressure reduction detector 38 is a pulse-shaped pattern signal GM.
The output of the OR element 40, which generates an output even if a signal from I to GM8 is input, is connected to a set-reset type flip-flop 4.
In addition to the set input of 1, the output thereof is pulse-shaped via a monostable mano-U Debye break 42, and is used as a command signal for the read timing of the index signals IS1 to IS5.

Then, after the carriage gives one output operation when the end needle enters, the set state of the flip-flop 41 does not change within the knitting width, and therefore the monostable multi-bi break 42
No index read signal is generated until the next set operation of flip-flop 41.

The release timing detector 39 receives as input one of the signals GSI to GS8 indicating the knitting needle number in the block from the switch 18 and one obtained by inverting the needle selection signal outputs P1 to Pn of the needle selection calculator 48, which will be described later. AND elements 58, an OR element 56 whose outputs are inputs, and an inverter 57.

In this circuit, the OR element 56 outputs any of the eight inputs, but when looking at the overall output R6, which is the inversion of its output, it appears that the logical product of all eight inputs becomes null. It can be said that the reset signal R6 is output in operation.

Regarding the point that the signal R8 outputted in this way means the end of each rope membrane, the AND element 5
Each of 8 generates an output in response to the pattern signal GSn corresponding to the needle being pressed by the lowering cam 7 under the condition that the needle selection calculator output Pn is not generated. The first needle under pressure in the direction of movement does not generate the excitation instruction signal Pn, which is the last needle selection calculation output, and the needle selection instruction signal M is not generated for the first time when the pressure lower needle follows the first needle as the reduction cam advances. Comparison operations with .

Therefore, as long as the pressing cam 7 remains within the knitted cloth, outputs are generated one after another to the AND elements 58 corresponding to the leading needles under pressure.

Of course, in addition to the first needle, the excitation instruction signal Pn is not generated for the pattern signal Gn when the corresponding needle selection instruction signal M is not given, so the AND element 58 is in the output state in that case as well. However, regardless of the presence or absence of such conditions, there is always an output from one of the AND elements 58 within the knitting width, and therefore the OR element 56 is also in an output state.

When the carriage 6 moves out of the knitting cloth, considering the width end needle on the exit side, if it is the leading needle under pressure, it is in an uncontrolled state. Of course, even if the lowering cam 7 advances, there is no lower needle to be pressed after the end needle, so in the end, the end needle on the exit side ends up without needle selection control. The output operation state of the AND element 58 corresponding to the side end needle is the pattern signal G corresponding to the end needle when the pressing cam 7 has passed over the end needle and the pressure is released.
When Sn disappears, the state changes to non-output, and at this time, all eight AND elements 58 become non-output, that is, the reset circuit 39
outputs a reset signal R6, which is distributed to each related circuit as a signal corresponding to the completion of one stage of formation, as described above.

After explaining the pattern logic circuit 47, the needle selection calculator 48 will be explained. It consists of eight needle selection calculators each having the same configuration, and each needle selection calculator receives an input needle selection instruction signal M. They are combined in such a way that they are distributed to output amplifiers 54 (8 pieces) on the output side.

Each needle selection calculator outputs excitation instruction signals P1 to P8 to the electromagnets when the logical product of both outputs of two set/reset type flip-flops 49 and 50 is established during set operation. Depending on the pattern signal corresponding to the leading needle that starts to be pressed down as the needle progresses, the pattern signal GM1 to GM8 of the leading needle is not outputted immediately, but is outputted through comparison by logical product with the needle selection instruction signal. When the content of the needle selection instruction signal M indicates needle selection, one of the flip-flops 49 is first operated in the cent state,
When the pattern signal corresponding to the next pressure-applied needle is received, the remaining flip-flop 50 is operated as a set, and at that time, the AND of the outputs of both flip-flops 4950 is determined and the control output signals P1 to Pn are activated. The end time of needle selection is detected by the action of the release time detector 390, and the reset signal R6 or the reduction detection signal GM (n + 4) of the knitting needle 4 steps later (where n is the knitting needle to be selected) , the flip-flop 49 is reset and the control output signals P1 to Pn are returned to low level.

That is, to explain the selection of the n-th needle in a certain block, the set input on the flip-flop 49 side receives a logical product of the pattern signal GMn and the needle selection instruction signal M via the AND element 51. The result is input, and at the same time, the pattern signal GMn is connected to the reset input terminal of the other flip-flop 50 in a relationship that provides a reset,
Next, a set signal via an OR element 52 that performs a logical sum operation of pattern plate signals GMn+1 and GMn+1 of the n+1st needle or n-1st needle adjacent to the nth needle is applied to a flip-flop 50 connected to a set input terminal. is set and working,
As described above, the set states of both flip-flops 49 and 50 are aligned, and the AND element 53 determines this and outputs the output amplification circuit 5.
An excitation instruction signal Pn is given to 4.

The output state of the signal Pn is maintained for 3 stitches from the time of output operation, and is connected to the reset input of the flip-flop 49 by the OR
The flip-flop 49 is reset and released by the arrival of the pattern signal GM(n+4) connected to one side of the element 55, which is delayed by four needles from the n-th needle.

The OR element 55 is connected to any of the eight needle selection calculators in parallel.
A reset signal R6 from the reset circuit 39 is connected, so that when the carriage completes one row of knitting and leaves the line, no pressure is generated on the outside of the end needles as the pressure lower needles disappear. The flip-flop 49 is reset in place of the lost follow-up reset signal GM(n+4).

Next, the pattern logic circuit 47 used as a logic operation means, which is a main component of the present invention, will be explained.

One specific example of this pattern logic circuit 47 is shown in FIGS.
Shown in Figure 4a.

The pattern logic circuit shown in these drawings includes eight exclusive NOR elements E.

~E7.8 pattern selection switches S.

-87 and one AND element 147.

This pattern logic circuit includes signals B2°, B21, B22 of each digit of the output binary code of the knitting needle number converter 34, and signals B2 of each digit of the output binary code of the knitting needle block detector.
3, B2', B25? B2' tB27 to each exclusive NOR element E in its respective order.

~ Also, as added to one input terminal of E7, the formation stage detector 3
The signals D2° to D27 of each digit of the output binary code of 6 are sent to each exclusive NOR element E in the respective order.

-A binary code is provided by a converter 34 and a detector 35, 36, as well as at the other input of B7.

Said signals B2°, B21. B22, B23,・
...The simultaneous arrangement of B27 represents the number of the knitting knitting needles among the entire knitting needles, and represents the carriage position with the left end or right end as the base point.

Exclusive Noah Element E.

-B7 produces a high level rlJ output when the two forces are of the same sign.

As a result, as shown in FIG. 9a, the pattern selection switch 5o
-87 are all closed to the exclusive Noah element Eo-E7, the needle selection is at a high level "1" which indicates "needle selection" when the carriage position binary code and the knitting stage binary code are equal. A signal M is output.

In other words, if the number of formation stages is expressed as y in decimal notation, x = y, 1
A needle selection signal M of high level "1" representing "needle selection" is output only at the 0-base carriage position X (knitting needle number), and the pattern knitting has the distribution of black circles shown in FIG. A pattern selection switch S as shown in FIGS. 11a, 12a, 13a and 14a.

-87 connections are combined in various ways, the regularity of the pattern changes as shown in FIGS. 10b to 14b.

The pattern logic circuit shown in FIG. 15a is an exclusive NOR element E.

- The output binary code of the formation stage detector 36 is converted into a decimal double binary code by the full adder 247 and applied to F7.
Each digit signal of a double (2y) binary code is shown.

As a result, the pattern distribution is x =
2y-1, the pattern is distributed according to the pattern gradient when the full adder 247 is not used.

If the full adder 247 is connected in such a manner that the binary codes B2° to B27 of the knitting needle number converter 34 and the knitting needle block detector 35 are input, the pattern slope will be 2 of the slope shown in FIG. 9b.
It will be doubled.

9a to 15a, an exclusive NOR element E is shown in the pattern logic circuit.

- Although we have shown examples using F7, full adder 247, etc., many regular patterns can be created by replacing the whole or part with other logic elements, adding other logic elements, inserting flip-flops, etc. Can be set or changed.

Furthermore, it is also possible to represent a circular pattern by including an arithmetic circuit that calculates, for example, x''+y,=a.

Nowadays, it is possible to easily perform logical operations such as addition, subtraction, multiplication, division, 5lrlt tant square root, and squaring using ultra-small microcomputers. It is also possible to represent a pattern.

As already explained, block display signals IS1 to IS5 indicating the carriage position and in-block knitting needle number display signals GS1 to GS8 are supplied from the needle selection mechanism section 1 to the needle selection control section 2, and based on these signals, the knitting needles are Number converter 3
4 and the knitting needle block detector 35 supply each digit signal B2° to B27 of the binary code representing the carriage position to the pattern logic circuit 47, and the knitting stage detector 36 supplies the digit signals B2° to B27 representing the carriage position to the pattern logic circuit 47.
Each digit signal D2° to D27 of the hexadecimal code is sent to the pattern logic circuit 47.
The pattern logic circuit 47 performs a logical operation on the carriage position binary code and the knitting stage binary code, and outputs a needle selection signal M uniquely determined by the carriage position and the knitting stage.

Then, the needle selection calculator 48 holds the needle selection signal M while the carriage 6 moves by four stitches, and during that time the output amplifier 54 uses the electromagnet 2 to hold the knitting needle to which the needle selection signal M is assigned in the lowered position.
30. Give excitation current to one.

While the knitting needles are thus compressed and restrained, they are guided by the carriage 6 to a selected course for pattern knitting.

In this manner, in the embodiment shown in FIG. 1, needle selection is performed while the carriage 6 moves in the left and right direction, and pattern knitting is performed according to the logic set by the pattern logic circuit 47.

As explained in detail above, in the present invention, a pattern signal is created at each carriage position and each contracted arrangement by a logical operation of a digital signal representing the position of the carriage and a digital signal representing the number of knitting stages, and this is used as a needle selection signal. Since the pattern signal is fed to the needle selection system as a needle selection system, it is possible to obtain pattern signals continuously over the entire range regardless of the width of the knitting. There is no need to repeat the pattern knitting operation during knitting, and no automatic repeat program or controller is required.

In the configuration of a simple regular pattern, storage devices such as RAM and ROM are not required, resulting in low cost.

Patterns that can be expressed by logical operations, such as regular patterns and geometric patterns, can be expressed by the pattern logic circuit of the present invention, and irregular non-geometric patterns such as animals, plants, and scenes can be expressed by RA in the same way as in the past.
By storing the pattern signals in M or ROM, it is possible to knit a wide variety of patterns without particularly increasing the capacity of the storage device.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG.
Fig. 7 is an explanatory diagram showing each part of the mechanical structure, Fig. 8 is a block diagram showing the electric circuit section, and Figs. 9a to 14a.
This figure is a block diagram showing a specific example of the pattern logic circuit 47 shown in FIGS. 1 and 8, and each of these figures shows a different pattern setting state. FIG. 15a is a block diagram showing another specific example of the pattern logic circuit 47. Figures 9b to 15b are figures 9a to 15a, respectively.
FIG. 7 is a plan view showing the output distribution of needle selection signals in the pattern setting state shown in the figure. Note that the same reference numerals in the figures indicate the same or equivalent parts. 1: Needle selection mechanism section, 22 Needle selection control section, 3: Needle bed, 4: Knitting needle, 5: Leaf spring, 6: Carriage, 7: Lowering cam, 8: Needle selection plate, 9: Index plate, 10: Cam part, 1
1: Spring, 12: Needle selection cam, 13: Serrated cam, 14: Hook-shaped groove, 15: Support rod, 16: Pin, 17: Throat,
18, 19 varnish inches, 20, 21: actuator,
22: window, 23: electromagnet, 24: operating rod, 25: pivot plate, 26: fulcrum hole, 27: retaining hole, 28 nib plunger 29
: Head hole, 30: Electromagnetic support plate, 31: Needle selection plate front plate, 32
: window, 42: monostable multibibreak, Eo%E7:
Exclusive Noah element, 88% S7: Pattern selection switch, 247: Full adder.

Claims (1)

[Claims] 1. In a needle selection control device of a knitting machine that detects the position of the carriage and provides a needle selection signal to the needle selection system in accordance with the carriage position, a digital code signal representing the carriage position is generated in response to a detection signal from the carriage position detection means. A position code generator that emits a position code generator, a formation stage code generator that expresses the number of stages organized by the carriage as a digital code signal, and a binarization system that takes these digital signals as input and fluctuates in height depending on the carriage position by the combination of these signals. 1. A needle selection control device for a knitting machine, comprising a logic operation means for outputting a signal, and the output of the logic operation means is provided as a needle selection signal to a needle selection system.