DE8034551U1 - FLAT KNITTING MACHINE - Google Patents

Description

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Plachstriclon machine

■ Field of application of the invention: ^JQ . <"

The invention relates to a flat knitting machine with two _io '' ■ '"consecutively" arranged ladelbettenpaaren, a plurality it in a direction circumferential knitting carriage, one on the selection of machine functions cooperating with the knitting carriage via switching latch electromechanical. -._ Control device as well as in an auxiliary bed stored, pattern electromechanically selectable jacquard sinkers. *

Characteristics of the known technical solutions:

It is already known on knitting machines, in an electromechanical Jacquard device to excite magnets by current, which via mechanical transmission elements a pattern according to Effect selection of needles. Each magnet is controlled by a switch, in particular one electronic S Charit er. The magnetic field of all magnets excited accordingly by the master and thus the Current flow is maintained for a certain period of time. However, this jacquard device has the Uac.Mreil that a Strong magnets have to act for a relatively long time to turn the mechanical transmission elements into the desired To bring position .. Such magnets have a high energy consumption and require a lot of space on the knitting machine that is not available. It is also known in flat-round automatic knitting machines, the control device, namely the switching bar of the knitting carriage ^ active switching curves, via plungers, stops

and means that can be controlled by holding magnets electromechanically in
to bring and lock the required position.
The jacquard sinkers stored in an auxiliary bed are also operated electromechanically, with each jacquard sinker having a permanent magnet with a coil and pole piece and e.ine
Tension spring is assigned. These jacquard sinkers are one after the other in selection position according to the desired pattern
bringable. In their basic position they lie with their one

Foot on the adhesive surface of the pole piece of the permanent magnet,

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and in their selection position they are supported by the mainspring

pressed against a stop. This Auswählste 1 * 1 clothes ER is ^a ^. [

is enough by the field of the permanent magnet, over its coil ge "'= ^

weakens and so the tension spring can take effect. This ^ f

Feldschv / ächung-de's permanent magnet lasts until the off- |

selected jacquard board the attraction area of the permanent magnet '■>%

has left. '. : |

This solution has the advantage that I

only briefly a field change of the selected perma- "Γ

nentmagnete is required, but it is still used for * each- * "I

the permanent magnet or for; each solenoid for actuation f

a switch and thus a high maximum power consumption f

needed. f

The entire electromagnetic part of the knitting machine require \ changed a high production and maintenance costs. \

Aim of the invention: _t ?.

It is the aim of the invention to reduce the material and time required for ί manufacture of electromagnetic actuators | to reduce, to simplify the operation and maintenance effort and reduce the maximum power consumption «. |

■ \ Explain the essence of the invention:. I.

The object of the invention consists in such an arrangement voltage and linking of the data required for control of the knitting machine and the J i patternwise Jacquardplatinenauswahl coil of the permanent magnets, that the number of necessary for its operation switch to be substantially reduced
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According to the invention, this task is achieved in that the coils of the permanent magnets of the jacquard and control device are combined in groups, as a crossing point in a matrix-shaped line network with rows and columns and each with an electronic switch for the individual rows and columns are arranged. The cell switches are connected to the pattern memory or to the memory for the control functions and the column switches are connected to a multiphase clock generator to receive the information. To decouple the matrix arrangement, a diode is assigned to each coil. A «group of coils of the. Permanent magnets corresponds dab Vi ₉ each one column of the matrix arrangement "0 ·" *

Each eifiaKi further LI er lana 1 of the invention is in place of the \ r ©> The running diode required for each coil in the case of such Matrix arrangements only each row or column switch is assigned an overrun diode, these respective switches to allow the coils to be opened earlier. Transistors, thyristors or integrated circuits can be used as electronic switches.

• Execution game:

The invention is to be explained in more detail below using an exemplary embodiment. In the accompanying drawings show: "3 ^

Prop. 1: the circuit arrangement for time division multiplex control the jacquard or control device

Fig. 2: a crossing point of this circuit arrangement as Detail

Prop. 3: a timing diagram for controlling the electronic switches

The line matrix shown in Figure 1 is; ' divided into rows 11 and columns 12. Their crossing points 13 are formed by the individual coils 14 of the permanent magnets of the jacquard and control device. The coils 14 represent with their decoupling _{T connected in series}

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diode 15 connects rows 11 and columns 12. D: '«· Coils 14 are combined in columns 12 to form groups. Transistors 16 - 16 used as electronic switches successively connect each coil 14 of a column 12 of the matrix to the negative pole of the voltage source 17. The transistors 16 - 16 ^m , as can be seen from FIG. 3,

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switched on one after the other by associated signals S - S. The signal state 1 means that the transistor 16 - I6 ^{m is} conductive, while the signal state 0 indicates that it is blocked. The signals SS ^ are through a digi-. talen counter formed. °

Synchronously trigger the signals S - S ^m for the transistors 16 - 16 predetermined signal states or time slots are the electronic * switches upstream of the respective lines 11, namely the transistors 18-18, pattern or control signals MSS - MSS ⁿ from the pattern memory, not shown or memories for the control functions are supplied in accordance with the pattern to be generated or the control function to be executed. If both signals S and MSS hit a crossing point 13 at the same time, the coil 14 to be excited is connected to the positive pole of the voltage source 17. As can also be seen from FIG. 3, the transistors 18-18 are blocked for a certain time, namely the free-running time T of the coils 14 before the time slot change, so that the coil orom can operate without generating a voltage peak via the associated free-wheeling diodes 19 - 19 ⁿ and the associated still conductive transistor 16 ¹ _ i6 ⁿ can be removed. By connecting these free-wheeling diodes 19 ¹ - 19 ^{n to} the collector of each transistor 18 - "\ 8 ⁿ , it is possible that a free-wheeling diode does not have to be arranged for each crossing point 13, for each coil 14 with decoupling diode 15. In addition, each of the free-wheeling diodes is required 18 - 18 ^{n to be designed} only for the current of a coil 14. '-.'

The actuation of the individual coils 14 now goes according to the connection the entire line matrix to the voltage source 17 as follows take place. Each column 12 receives electronic switches connected to the negative pole of the voltage source Ί7,

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namely, the transistors 16-16 successively signals

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S - S ^ra , that is, the transistor 16, the signal S, the transistor

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tor 16, the signal S so that the intersection points in sequence 13, that is, d _c ie coils 14 with decoupling diode through. Synchronously with these signals S - S 'arrive via electronic switches, via transistors 18 - 1 8 ^Ώ connected to the positive pole of the voltage source 17 from the sample memory or from the memory for the control functions.

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de signals MSS - MSS "to the crossing points 13. If both signals S and LSS meet a crossing point 13, the respective coil 14 is excited and the corresponding pattern or control function is triggered.

In order to avoid high voltage peaks, the individual transistors 18-18 ^J are blocked by the free-running time T of the coils 14 before the time slot change, ie before the conductive transistor 16-16 ', ^ is switched off. With this line matrix it is possible, instead of providing a switch for each individual coil 14, only for one group of coils 14 and for the pattern information. A considerable number of electronic switches can therefore be saved. In addition, the power consumption can be reduced by this solution, a relatively low-power voltage source 17 can be used. Instead of transistors as electronic switches, it is of course also conceivable to use thyristors or integrated circuits, just as an appropriately programmed control system can serve as a signal transmitter for the columns 12.

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Summary <*

The invention relates to a flat knitting machine with two. one behind the other arranged pairs of needle beds, a plurality over it in one "'direction revolving knitting carriage, one with the knitting carriage interacting electromechanical Control and an electromechanical jacquard device.

Their goal and their task are to reduce the cost of materials for the electromagnetic actuating elements, in reducing the maximum power consumption as well as in such a connection of the coils of the permanent magnets, that the number of their operating switches can be reduced.

According to the invention, this is achieved in that the coils of the permanent magnets are combined in groups, as crossing points in a matrix-shaped line network with rows and columns and each with an electronic switch connected to a pole of the voltage source for., The individual · Rows and columns are arranged. The line switches · thereby connected to the pattern memory and the memory for the control functions and the column switch _and a multi-phase clock.
Fig. 1 '■ ·

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Claims (4)

Invention claim <* 1. Flat knitting machine with two one behind the other
Needle bed pairs, a large number of S'u'rick slides revolving above them in one direction, one for the selection of
Machine functions interacting with the knitting slide control device as well as in an auxiliary bed stored, pattern-based selectable Jacuard sinkers, which each associated with a permanent magnet, 'characterized in that, for sequential control, the coils (14) of the permanent magnets of the jacquard and control device in, groups ) and each with one pole of the voltage source
(17) connected electronic switches (16 ¹ - I6 ^m ; 18 18 ^η ) for the individual rows (11) and columns (12) are arranged, the cell switches (18-18) to receive the information with the Llust he store or are connected to the memory of the control functions and the column switches (16 I6 ^m ) with a polyphase clock generator, and for decoupling a matrix arrangement of each coil (14).
a decoupling diode (15) is assigned. 2. Flat knitting machine ^ according to item 1, characterized in that in each case one group of side-by-side coils (14) of the permanent magnets corresponds to a column (12) of the llatrix arrangement. ¹ * 3. Flat knitting machine, marked according to point 1 and 2
in that instead of the freewheeling diodes required for each coil (14) in such matrix arrangements
in the case of an earlier by the free-running time of the coils (14)
Open the row and column switches (18 ¹ - 18 ⁿ );
(16 - 16) only one free-wheeling diode (19
19) is assigned » 4. Flat knitting machine - marked according to point 1 to 3
in that, as electronic switches, transistors
Thyristors or integrated circuits are used
are. ■ '.