JP2890124B2 - Drive of knitting element in warp knitting machine - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a driving device for a knitting element in a warp knitting machine, and in particular, a momentum and timing of a knitting element can be freely set according to a change in specification of a knitting portion. About things.

[Conventional technology]

As is well known, a warp knitting machine feeds a plurality of warps in parallel to a plurality of knitting needles, and the vertical movement of the knitting needles, the movement of the guide bar in the knitting needle row direction, that is, the wrapping, and the knitting needle row are in a perpendicular direction. The knitting motion is performed by the combination of the swing motions of the above.Each of these knitting elements, for example, the motion of the knitting needle, the guide needle, and the stitch comb in the Raschel machine,
It has a cam surface which is fitted in parallel with the knitting needle row to a camshaft (also referred to as a main shaft) penetrating between side frames of the knitting machine and processed in accordance with a knitting motion diagram required for each knitting element. The movement of each knitting element is caused by a drive cam or the like via an intermediate lever and an arm as appropriate.

The shape of the cam described above 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 the movement position is determined based on the cam curve set so that each knitting element can be knitted in synchronization. Are aligned.

[Problems to be solved by the invention]

For this reason, for example, a significant change in the stitch formation range due to an increase or decrease in the number of guide bars cannot be changed by the same cam, and therefore, it is necessary to replace the cam itself with a different shape each time. At present, various specifications such as changes in the number of guide bars, the stroke amount of the knitting needle, and the movement locus of the knitting needle are required for each model. For this reason, the types of cams are extremely large, and for new specifications, since the shape of the cams is determined manually to create a master cam each time, very complicated work is required. Even if the work is performed by a skilled person,
It took 10 days.

The present invention solves the above-mentioned drawbacks, performs the movement of each knitting element via a servomotor, and controls the rotation amount of the motor based on data analyzed by a computer, thereby freely setting the movement of each knitting element. It is intended to provide a warp knitting machine capable of doing so.

[Means for solving the problem]

A driving device for a knitting element in a warp knitting machine according to the present invention includes a servo motor as a driving means for a drive shaft for driving a support member of a knitting element in a knitting machine such as a knitting reed or a knitting needle, and the servo motor is a CPU board. Connected to a positioning controller and a servo driver, and sends a control signal based on the rotation speed data and rotation angle data of the drive shaft previously input to the positioning controller to the servo motor from the servo driver to individually synchronize each drive shaft. It is configured to rotate.

[Action]

The movement of each knitting element is performed by a servomotor driven by a control signal converted on the basis of data analyzed by a computer. By inputting only the data to a computer and converting the analyzed data into a control signal via a controller, and sending the control signal from a servo driver to a servomotor, a desired knitting motion of each knitting element can be obtained.

〔Example〕

 The present invention will be described with reference to the drawings.

FIGS. 1 to 3 are schematic side views showing the configuration of driving means corresponding to each knitting element in the knitting element driving device of the present invention. In FIG. The reed portion 2 extends in the longitudinal direction of the knitting machine (in a direction perpendicular to the plane of the paper), and is fitted to a shaft 3 rotatably supported at both ends by a side machine frame (not shown). It becomes. Reference numeral 4a denotes a worm, which is meshed with a worm wheel 5a fitted coaxially with the shaft 3, and 6a is an AC servomotor, and an appropriate mounting seat (not shown) for rotating the worm shaft 7a. The shaft 3 is rotated by the rotation of the AC servomotor 6a, and the reed portion 1 is swung in the direction of arrow A.

Reference numeral 8 denotes a knitting needle. A plurality of knitting needles 8 are attached to a knitting needle bar 9 at a constant pitch.
10 is connected to the arm 11 and is supported on the shaft 12 at one end of the arm 11.
A vertical movement is made in the direction. Reference numeral 5b denotes a worm wheel, which is fitted coaxially with the shaft 12 and is provided on the shaft of the AC servomotor 6b attached to an appropriate mounting seat.
It is engaged with 4b. FIG. 2 shows knitting element driving means for causing the knitting needle 8 and the trick plate 13 to swing in the direction of arrow C. The knitting needle bar 9 holding the knitting needle 8 and the trick plate 13 are driven by a support shaft 15. Will be retained. Reference numeral 16 denotes a lever, reference numeral 17 denotes a rod, reference numeral 18 denotes an arm, reference numeral 19 denotes a support shaft rotatably supporting the arm 18, and a lever 16 having one end fitted to the support shaft 15 and an arm 18. Are connected by a rod 17. Reference numeral 5c denotes a worm wheel, which is fitted coaxially with the support shaft 19, and is fitted to the worm wheel 5c on a rotating shaft of an AC servomotor 6c attached to an appropriate mounting seat (not shown). The worm 4c is engaged. FIG. 3 shows the driving means of the knitting element for moving the stitch comb 20 back and forth in the direction of arrow D. The stitch comb 20 is attached to a holding bar 21, and the holding bar 21 is attached to the other end of an arm 23 having one end fitted to a support shaft 22. A worm wheel 5d is fitted coaxially with the support shaft 22, and a worm wheel
5d meshes with a worm 4d rotated by an AC servomotor 6d.

The above is the configuration of the embodiment of the driving device of the present invention,
Next, an example of the control method will be described based on FIG. 4 and FIG.

Reference numeral 31 denotes a personal computer, which inputs data based on the motion diagram of each knitting element by key-in and stores the data in a floppy sheet. Reference numeral 32 denotes a positioning controller, in which a CPU board 33 including a memory and a positioning board 34 are provided. In this memory, the data content of the floppy sheet is stored in the memory in the CPU board 33 via the personal computer 31. Is done. The positioning board 34 includes a pulse generation circuit 35, a deviation counter 36, and a D /
It includes an A converter 37, an amplifier 38, and a pulse multiplication circuit 39. Reference numeral 40 denotes an AC servo driver. The AC servo driver 40 includes a speed control circuit 41, a power circuit 42, and a speed detection circuit 43. The servo motor 6 includes a motor unit 44 and an encoder 45.

Thus, for each knitting element, that is, for the knitting reed 2, the knitting needle 8, the trick plate 13, and the stitch comb 20, the amount of movement for each angle corresponding to each knitting cam curve is converted into the input rotation speed data and rotation angle amount data. The calculated data is stored in the memory in the CPU board 33. Reference numeral 46 denotes a spindle motor, which rotates the spindle 47 to drive other components of the warp knitting machine, for example, a patterning portion, a winding portion, a yarn feeding portion, and the like. Although explanation is omitted, it may be controlled by a servo motor provided for each. Here, a pulse generator 48 having a built-in circuit for generating a clock signal
Is provided, and a motor control circuit 49 is provided for the spindle motor 46.
When the start signal of the knitting machine 50 is sent from the
46 starts rotating, and at the same time, a clock signal is emitted from the pulse generator 48, and in synchronization with the signal, the CPU board 33
Each of the positioning boards 34a, 34b, 34 is controlled by a control signal based on the calculated rotation speed data and rotation angle amount data.
The required pulse generation is prompted to the pulse generation circuits 35a, 35b, 35c, and 35d of c and 34d, and the generated pulses are transferred from the AC servo drivers 40a, 40b, 40c, and 40d for the required number of pulses for each predetermined angle. . This allows each AC servo motor 6a,
6b, 6c, and 6d are rotated in response to the pulse, and are passed through the worms 4 through the respective worm wheels 5 to the respective axes 3, 1
2, 19 and 22 are rotated. Where encoder 45
The feedback signal is transmitted to the speed detection circuit 43 and counted up by the deviation counter 36 via the pulse multiplication circuit 39. In a closed loop, while the knitting machine is moving, each servo motor 6 is repeatedly controlled, and the knitting machine is controlled. At the same time, the pulse generation from the pulse generator 48 is interrupted, so that the clock signal is stopped, the pulse transfer to each servomotor is also stopped, and the brake is applied at the knitting position.

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

What has been described above is an example of a Raschel machine which is a type of warp knitting machine, but of course, besides this, it can be applied to all other warp knitting machines such as various Raschel machines, tricot machines and crochet machines. It goes without saying that various changes can be made without departing from the scope of the present invention.

〔The invention's effect〕

As described above, according to the present invention, the cam making operation in the warp knitting machine can be eliminated, inventory management of various cams becomes unnecessary, and the knitting timing of the knitting machine can be changed only by the necessary data in advance. Is input to the computer, it is possible to easily cope with a change in specifications, and contribute to the rationalization of knitting machine parts management and work.

[Brief description of the drawings]

FIGS. 1 to 3 are schematic side views showing one embodiment of a driving means corresponding to each knitting element in the knitting element driving device of the present invention. FIGS. 4 and 5 show the present invention. It is a block diagram for explaining an example of a control method of a drive device of a knitting element. Description of reference numerals 2 ... Reed, 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)

(57) [Claims] An apparatus for driving a knitting element such as a knitting reed or a knitting needle in a warp knitting machine, wherein a driving means of a drive shaft for driving a support member of the knitting element is a servomotor, and the servomotor is a CPU. Connected to the positioning controller including the board and the servo driver, the servo driver sends a control signal based on the rotation speed data and rotation angle data of the drive axis input to the positioning controller in advance to the servo motor from the servo driver and separates each drive axis. A driving device for a knitting element in a warp knitting machine, which is configured to perform synchronous rotation.