JPH02210047A - Driving device of knitting element in warp knitting machine - Google Patents

Abstract

PURPOSE:To make various cams unnecessary and eliminate trouble of control by driving each constructing elements of warp knitting machine such as reed or knitting needle with respective servo driver through controllers. CONSTITUTION:Driving shaft in each constructing element such as reem or knitting needle in warp knitting machine is made to a structure driven by respective servo motor and respective servo motor is operated by respective servo driver. Respective servo driver is operated by controlling signal according to rotation speed data of respective driving shaft and rotational angle data previously inputted in positioning controller.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a drive device for knitting elements in a warp knitting machine,
In particular, it relates to a system in which the momentum and timing of knitting elements can be freely set in response to changes in the specifications of the knitting section.

[Conventional technology]

As is well known, the warp machine feeds multiple warp yarns to multiple knitting needles in parallel, and in response to the vertical movement of the knitting needles, the guide bar moves in the direction of the knitting needle row, that is, wrapping, and the knitting needle row is perpendicular to the vertical movement of the knitting needles. One knitting motion is made by the combination of the swing movements of the knitting machines, and the movement of each of these knitting elements, for example, the knitting needles, guide needles, and stitch combs in a Raschel machine, penetrates between the side frames of the five machines in parallel with the knitting needle row. A drive cam, etc., which has a cam surface machined according to the knitting movement diagram required for each knitting element, is fitted onto a camshaft (also called the main shaft) that is connected to the knitting element. Movement of elements is occurring.

The above cam shape is determined by the stroke amount of the knitting needle, the swing amount of the guide bar, and the stroke amount of the stitch comb, and is based on the cam curve that is set so that each knitting element can be knitted in synchronization. The movement position is aligned.

[Problem that the invention seeks to solve]

For this reason, for example, drastic changes in the stitch formation range due to an increase or decrease in the number of guide bars cannot be made with the same cam, so this can be dealt with by replacing each cam itself with one of a different shape. Currently, various specifications are required for each model, such as changes in the number of guide bars, stroke amount of the knitting needles, and movement locus of the knitting needles. For this reason, there are many types of cams, and for each new specification, the shape of the cam must be manually determined in order to create a master cam, which is a very complicated process. 5~ even if the work is done by a skilled person
It took 10 days.

The present invention solves the above-mentioned drawbacks, moves each knitting element via a servo motor, controls the amount of rotation of the motor based on data analyzed by a computer, and thereby freely sets the movement of each knitting element. The purpose of this invention is to provide a warp knitting machine that can.

[Means for solving problems]

The drive device for knitting elements in the warp knitting machine according to the present invention includes:
A servo motor is used as a driving means for a drive shaft for driving a support member of a knitting element in a warp knitting machine such as knitting needles,
The servo motor is connected to a positioning controller including a CPU board and a servo driver, and a control signal is sent from the servo driver to the servo motor based on the rotation speed data and rotation angle amount data of the drive shaft that have been input in advance to the positioning controller. The structure is such that each drive shaft individually rotates synchronously.

[Effect]

The movement of each knitting element is performed by a servo motor that is driven and controlled by control signals converted based on data analyzed by a computer.When changing the motion diagram of each knitting element, new data is required. The desired knitting movement of each knitting element can be obtained by inputting only the knitting data into a computer, converting the analyzed data into a control signal via a controller, and sending the control signal to a servo motor from a servo driver.

〔Example〕

The present invention will be explained based on the drawings.

1 to 3 are schematic side views showing the structure of the driving means corresponding to each knitting element in the drive device for knitting elements of the present invention, and in FIG. The punched part 2 extends in the longitudinal direction of the knitting machine (perpendicular to the plane of the paper) and is fitted onto a shaft 3 whose both ends are rotatably supported by a side machine frame (not shown). It becomes. 4a is a worm, and a worm wheel 5a is fitted coaxially with the shaft 3.
6a is an AC servo motor, which is attached to a suitable mounting seat (not shown) to rotate the worm shaft 7a, and the rotation of the AC servo motor 6a rotates the shaft 3. The cutout part 1 is swung in the direction of arrow A.

Reference numeral 8 denotes knitting needles, and a plurality of knitting needles 8 are attached to a knitting needle bar 9 at regular pitch intervals, and one knitting needle bar 9 is attached to a rod 1.
0 and arm 11, and shaft 1 is connected to one end of arm 11.
2, and the knitting needle bar 9 is supported by the rotation of the shaft 12.
is moved up and down in the direction of arrow B. A worm wheel 5b is fitted coaxially with the shaft 12 and is engaged with and pushed against a worm 4b provided on the shaft of an AC servo motor 6b attached to a suitable mounting seat. Figure 2 shows 1g, 1 needle B and! - shows the driving means of the knitting elements for swinging the trick plate 13 in the direction of arrow C, the knitting needle bar 9 holding the knitting needles 8 and the trick plate 13;
is held so as to be driven by a support shaft 15. 1
6 is a lever, 17 is a rod, ]-8 is an arm, 1
9 is a support shaft rotatably supporting the arm 18;
A lever 16 whose one end is fitted onto a support shaft 15 and an arm 1
8 are connected by a rod 17. A worm wheel 5c is fitted coaxially with the support shaft 19, and the worm wheel 5c is fitted with a rotating shaft of an AC servo motor 6c attached to a suitable mounting seat (not shown). The worm 4C is engaged. FIG. 3 shows a drive means for the knitting element for moving the stitch comb 20 back and forth in the direction of the arrow.6 The stitch comb 2o is attached to a holding bar 21, and the holding bar 21 is attached to a support shaft 2.
It is attached to the other end of an arm 23 having one end fitted into the arm 23. A worm wheel 4d is coaxially with the support shaft 22.
is fitted, and the worm wheel 4d is engaged with a worm 5d rotated by an AC servo motor 6d.

The configuration of one embodiment of the drive device of the present invention has been described above, and next, an example of its control method will be explained based on FIGS. 4 and 5.

31 is a personal computer in which data based on the motion diagram of each knitting element is keyed in and stored on a floppy sheet. 32 is a positioning controller which includes a CPU board 33 including memory and a positioning board. 34, in which the data contents of the floppy sheet are stored in the memory in the CPU board 33 via the personal computer 31.The positioning board 34 includes a pulse generation circuit 35,
It includes a deviation counter 36, a D/A converter 37, an amplifier 38, and a pulse multiplier circuit 39.

40 is an AC servo driver, and the AC servo driver 40 includes a speed control circuit 41. It includes a power circuit 42 and a speed detection circuit 43. The servo motor 6 is
It is composed of a motor part 44 and an encoder 45.

Therefore, each composition element part composition 2. ．． l! Regarding the if needle 8, trick plate 13 and stitch comb 20,
The amount of movement for each angle corresponding to each knitting cam curve is calculated based on the input rotation speed data and rotation angle amount data, and the data is stored in the memory in the CPU board 33. 46 is a main shaft motor, and main shaft 4
7 to drive other components of the warp knitting machine, such as the patterning section, winding section, and yarn feeding section. It may also be controlled by a servo motor. Here, the main shaft 47 is provided with a pulse generator 48 having a built-in circuit for generating a clock signal, and the main shaft motor 46
On the other hand, when a start signal for the knitting machine 5o is sent from the motor control circuit 49, the main shaft motor 46 starts rotating, and at the same time a clock signal is emitted from the pulse generator 48, and in synchronization with this signal, the CPU board 33 performs calculations. Each positioning board 34a, 34b, 34c, 34 is controlled by a control signal based on the rotation speed data and rotation angle amount data.
The pulse generation circuits 35a, 35b, 35c, and 35d of d are prompted to generate the required pulses, and the generated pulses are transferred from the AC servo drivers 40a, 4ob, 40c, and 40d in the required number of pulses for each predetermined angle. As a result, each AC servo motor 6a, 6b, 6c, 6d is caused to rotate in accordance with the pulse, and each shaft 3, 12, 19, 22 is rotated via each worm 4 and each worm wheel 5. . Here, the feedback signal from the encoder 45 is transmitted to the speed detection circuit 43, passes through the pulse multiplier circuit 39, and is counted up by the deviation counter 36. In a closed loop, when the knitting machine is in motion,
Each servo motor 6 is repeatedly controlled, and at the same time as one knitting machine is stopped, the pulse generation from the pulse generator 48 is stopped, the clock signal is stopped, and the pulse transmission to each servo motor is also stopped, and the knitting machine is stopped. The brake can be applied at this position.

The warp knitting machine is operated by repeating the above knitting operation.

The above explanation is an example of a Raschel machine, which is a type of warp knitting machine, but it can of course be applied to all other warp knitting machines, such as various other Raschel machines, tricot machines, and crotchet machines. It goes without saying that various modifications may be made without departing from the scope of the claims of the present invention.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to eliminate the work of creating cams in a warp knitting machine, and the inventory management of various cams is no longer necessary, and the knitting timing of the knitting machine can be changed only by using the necessary data in advance. By inputting the information into a computer, changes in specifications can be easily dealt with, contributing to the management of knitting machine parts and the streamlining of work.

[Brief explanation of the drawing]

1 to 3 are schematic side views showing an embodiment of the driving means corresponding to each knitting element in the knitting element drive device of the present invention, and FIGS. 4 and 5 are FIG. 2 is a block diagram for explaining an example of a method of controlling a drive device for a knitting element. Explanation of symbols 2...Knitting 6a, 6b, 6c, 6d-AC servo motor 8...Knitting needle 32...Positioning controller 33...CPU board 40...AC servo driver 50...Knitting machine

Claims (1)

[Claims] A drive device for knitting elements such as knitting reeds and knitting needles in a warp knitting machine, in which a servo motor is used as a driving means for a drive shaft for driving a support member of the knitting element, and the servo motor is connected to a positioning controller including a CPU board. And, it is connected to a servo driver, and the servo driver sends control signals based on the rotation speed data and rotation angle amount data of the drive shaft that have been input into the positioning controller in advance to the servo motor to perform individual synchronous rotation of each drive shaft. A drive device for knitting elements in a warp knitting machine, characterized in that it is configured as follows.