DE2164013A1 - Method and device for controlling the thread guidance of Raschel machines - Google Patents

Description

DIPL.-ING. KLAUS BEHN DIPL.-PHYS. ROBERT MÜNZHUBER

PATENT LAWYERS

β MÖNCHEN 22 WIDENMAYERSTRASSE 6 TEL. (0811) 222530-295192

December 22nd, I97I Us. Sign: A 418 7I - Mü / La

Company KAYABAKOGYOKABUSHIKIKAISHA, Sekaiboeki-center-Building, No. 5 * 3-chome, Shibahamamatsu-eho, Minato-ku, Tokyo, Japan.

Method and device for controlling the thread guidance of Raschel machines.

The invention relates to a method and a device for the automatic control of the thread guide a rustling machine. The invention consists in a method and a device for electrical and hydraulic Control of the displacement movement of a thread guide rail of a Raschel machine by means of a © lektro-

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Bankhau. Merck. Flnck ft Co. MUnch.n. No. 30 484 i Bankhaus H. Aufh & usar, Münch.n. No. 281300 Poatachack: Munich 30804 T.lagrammadr · ».: Patanta.nior

niche computer and an adjusting cylinder, such as a digital cylinder.

With a warp-knit Raschel machine, that plays Device for guiding the warp threads to the knitting needles, d. H. the pade guiding mechanism, a very essential one Role, as this device determines the change in the pattern or color and structure patterns of the fabric, as well as the physical properties of the warp-knitted fabric, such as its thickness, shrinkage, stability and the like, The thread guide device usually has a thread guide rail, which in turn has a plurality of Has thread guides, this device performing two movements. One movement is to and fro for an oscillating movement in the transverse direction of the pad guides over the needles, while the other movement an offset movement is to move the thread guides in the transverse direction in front of the needles by a distance equal to a distance or two distances between the needles and behind the needles by an appropriate one Stretch, The back and forth movement is a preparatory movement for the delivery of the warp threads to the needles during the next movement, d. i.e., relocating. The back and forth movement in the longitudinal direction of the pad guides over the needles

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therefore need not be performed with a particularly high degree of accuracy. So is from the main shaft the Raschel machine carried a thread guide lock, the various movements of the machine in a predetermined time relationship able to control, such that the pad guide rail rotates twice or three times as fast as the Main shaft. Such a rotation of the pad guide rail can be controlled in a simple manner.

During the offset movement, the transverse displacement of the thread guides in front of the needles is also fairly easy. The thread guides are shifted by a distance that is equal to a distance or two distances between the needles, depending on whether it is a knitting process with one or two needle sticks. This transverse displacement or back and forth movement can therefore, for example, by means of a cam or lock which is seated on the main shaft. The transverse displacement or back and forth movement of the thread guides Behind the needles, however, plays a big role in determining changes to the pattern, such as the coloring and color scheme Structural pattern. That is, depending on the desired pattern, the shift must be precisely controlled. With the previous ones For this purpose, Raschel machines are mechanically

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see tax method applied, roughly based on a chain control. In the chain control, a ram that protrudes transversely from the pad guide rail works with its free end together with the free end of a rotatable quadrant; one carried by the quadrant Roll is normally pressed against a piece of chain that extends between rollers, namely under the Force of a guide rail spring. When the rollers rotate, the displacement of the roller changes as a function from the heights of the chain links, so that the transverse displacement of the thread guide rail through the quadrant and the role is controllable.

In the previously known Raschel machines of the type mentioned, thousands or tens of thousands of Chain links to be strung together, depending on the desired pattern, before the machine is put into operation can be. The chain control is thus troublesome and time-consuming, resulting in high costs. In addition, if the pattern is to be changed, the chain assembly must be disassembled and be reassembled according to the new pattern. Another disadvantage of chain control is that the chain has a considerable length, so that a large amount of space is required

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is. There is also the risk that the to act Fabric is contaminated by chain lubricating oil; a loud noise also occurs during operation.

The object of the present invention is to overcome the mentioned disadvantages of the usual chain controls of Overcome rustling machines. In short, the invention resides in a method and apparatus for Controlling the displacement movement in Raschel machines, the invention being characterized in that a color pattern is converted into electrical signals by means of a reader, these electrical signals on a recording medium recorded on the recording medium Stored electrical signals are then entered into an electronic computer in such a way that this electrical signals together with structural information, which is stored in the computer, in an active program or electrical signals are converted, which actuators ^ actuate a digital cylinder, for example, whereby the thread guide rail for the purpose of controlling its displacement movement is controlled.

With the invention, the usual Kefctensteuerung can be dispensed with, and it becomes the re-modusability of different color and structure patterns

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improved, since the active programs available from the electronic computer are stored on a suitable recording medium can be. The stored signals can then be called up at any time to operate the actuators be, which is made possible, the displacement movement of the thread guide rail to control. This significantly reduces the cost of changing a pattern. Farther a variety of patterns can be stored and easily accessed j can also take up the space required by the Raschel machine can be significantly reduced.

Further details of the invention are explained with reference to the drawing. On the drawing is a preferred one Embodiment of the invention shown for example, namely show:

Fig. 1 is a block diagram of the invention Method for thread control in Raschel machines, and

Fig. 2 is a sketchy representation of an arrangement for driving a thread guide rail,

Referring to Fig. 1, a color pattern of one to be acted upon is shown Qewebes converted into coded electrical signals with the aid of a pattern reader. For this purpose it becomes Sample sheet at a specified speed in the longitudinal direction

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<■ 7.-

Moved device while a light source and a photo element in the transverse direction across the color sample sheet at a given speed and a given width. The pattern sheet is thus scanned and the pattern is thus converted into electrical signals, such as pulse sequences, the amplitude or duration of which is in Changes depending on the colors included in the pattern. The color-representing quantized impulses can be converted to /, suitable, previously known manner can be obtained, for example as a function of the brightness of the reflected light.

The scanning density can be changed depending on the patterns, as can the speed of the photocell and Light source. For example, the scanning can take place with a screen density corresponding to the stitches of the one to be worked Tissue so that electrical signals are obtained which represent the color of each individual stitch.

The electrical pattern signals obtained in this way are written into a punch card with the aid of a punch drawn, whereby the punch card then represents the source of information for a specific color sample.

As the recording of color pattern information

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as described, carried out automatically. Costs, time and effort can be saved and both storage and planning are made much easier. In addition, a desired Parb pattern information can be called up at any time for reuse. This is in contrast to the ™ Method of chain control in which a chain is used as a memory element for the parb pattern information and the production and changing of various color samples is tedious and troublesome.

There is a "one to one" relationship between the color pattern and the structure pattern of the fabric to be worked exists, the information of the structural pattern is previously stored in the electronic computer, d. H. a storage device of the same.

When the punched card strip containing the pattern information is read out by a reader of the electronic computer, the computer selects the structure pattern information according to the color pattern information and emits the desired output signals which can be used to control the thread guide rail of the Raschel machine.

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The output signals of the electronic computer are amplified and controlled by means of an amplifier Actuators, which in turn control the displacement movement of the PadenfUhrungen.

This means that the knitting process can be programmed quickly and easily to the desired color and structure patterns will. Since the program consists of electrical signals, there is no need for physical operation. If necessary several Raschel machines can be subjected to the control of the same knitting program at the same time will.

The active program signals emitted by the electronic computer are preferably binary-coded signals; digital cylinders are then used as actuators to control the offset movement, their pistons as a function of the binary coded signals as a child « be moved. There are several types of digital Cylinders known and © rhaltlioh. Examples of such digital cylinders can be found in the * üS patent specification 3 264 9 ^ 7, so that further explanations hler niefefe @ pfos * - that are.

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-ΙΟ-

In Pig. Such a digital cylinder is denoted by 10 in FIG. Its output piston 12 is rotatable hinged to a connecting rod 16 which protrudes from a thread guide rail 14, openings loa-loe des Digital cylinders Io are equipped with solenoid valves 18a-18c, which have three openings and two switch positions as well as being operable at high speed, in connection, and also with a hydraulic pressure source 22 with hydraulic circuits 2oa-2oe. The knitting program signals from the amplifier are sent to the solenoid valves 18a-18c given.

Depending on the active signals, which are in the form of binary coded signals on the solenoid valves 18a-18d are given, the digital cylinder 10 is actuated and controls the displacement movement of the thread guide rail 14 via the connecting rod 16, whereby a fabric of the desired color and structure is then knitted will.

From the above description it follows that the Qeeamtabmeasungen of the thread exercise device is reduced and the space requirement of the Raschel machine, compared with the known chain system, is smaller will.

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209830/0618 BATH ORIGINAL

In the embodiment described here, the knitting program signals of the electronic computer given via the amplifier to the three channels and two switching positions having solenoid valves, which control the digital cylinder, which in turn controls the displacement movement of the thread guide rail. the However, the active program signals emitted by the computer can also be stored on a suitable recording medium are, for example, a punched tape, which is then entered into the readout device of a Raschel machine. so as to control the displacement movement of the thread guide rail in the above-mentioned manner.

Of course, numerous modifications are possible without departing from the scope of the invention.

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Claims (5)

PATENT CLAIMS 1. A method for controlling the thread guide in Raschel machines, characterized in that a color "Sample into electrical using a color sample reader Signals is converted, these electrical signals are recorded on a recording medium, thereupon the electrical signals stored on the recording medium in an electronic computer which these electrical signals together with structural pattern information stored in the computer converts it into electrical signals which represent effective program information, and that finally P this knitting program information is given to actuators, which the displacement movement of the thread guide rail of the Raschel machine. 2. The method according to claim 1, characterized in that for converting the color pattern by means of the color pattern reader a light source and a photocell are used, with a scanning density that is a "One to one" relationship to the individual stitches or -IJ-209 8 30/06 18 Mesh of the fabric to be worked guaranteed. 3. The method according to claim 1 or 2, characterized in that the output from the electronic computer and the electrical signals representing the active program have the form of binary code signals and a A large number of three channels and two switching positions having Solenold valves actuate, which then in turn Actuate actuators, the actuating steps of which are digitally controlled as a function of the binary code signals , whereby the displacement movement of the thread guide rail is controlled. 4. The method according to claim 3, characterized in that the electrical signals emitted by the computer and representing the active program are written into a recording medium and the recorded active program signals are read out by means of a reading device in such a way that they actuate the solenoid valves and thus control the actuators, where & uyoh the offset movement of the thread guide rail itself is controlled _e 5. 3teuervorriohtung for the thread guide bsi lasche lraasehinen, characterized by a 6AD ORIGINAL - 14 209 8 30/0618 for converting a color pattern into electrical signals, by a punch device for recording them electrical signals on a recording medium, for example a punched tape, by an electronic Rtohner to transfer the on the recording medium recorded electrical signals together with structural pattern information stored in the computer in electrical output signals, which represent the active program, depending on the active program signals of the computer operable actuators and by one through the knitting program signals with respect to the displacement movement controlled thread guide rail 6, device according to claim 5 »characterized in that the actuators have three-channel solenoid valves with two switching positions, which are controlled as a function of the active program signals of the computer, and that actuating elements are provided which are in turn controlled by the solenoid valves · 7, device according to claim 6, characterized in that that the actuating elements consist of a digital cylinder, the switching step of which depends on • 15 BAD ORJGJNAL 2Q9830 / GS18 the signals available as binary code is digitally controlled. 209830/0618