CZ2006300A3 - Device for axial movement of knitting machine density cam - Google Patents

Abstract

The stepper motor 1 is connected to the electronic control device of the machine. A pinion 3 is provided on the shaft of the stepper motor 1, which is in engagement with the toothing 4 formed on the eccentric 5 at a ratio of 1: 2. Thus, the number of teeth on the eccentric 5 is twice that of the pinion tooth 3. The eccentric 5 is rotatably mounted in the vertical part of the stand 2. On its cell, a roller 51 is mounted on its outside, which fits into the horizontal groove 61 of the slider 6. The slide 6 is axially displaceable arranged in the lock 7 of the knitting system. A needle retracting lock 8 is mounted on the slider 6, the known working edge of which controls the butts of the not shown pins (not shown).

Description

Device for axial movement of density lock of knitting machine

The invention relates to a device for axial movement of a density lock of a knitting machine, in particular of a small diameter for the production of sock or the like, which is mounted on an axially displaceable slider engaged with an eccentric driven by a stepper motor.

BACKGROUND OF THE INVENTION

A small diameter sock knitting machine is known which is equipped with a device for individually controlling the stitch depth in individual knitting systems. This device consists of a stepper motor, which is coupled by means of an eccentric and a lever to a vertically sliding retractable slider. density lock. According to the commands of the electronic control device of the machine, the stepper motor is then rotated and thus the retractable lock is set in its height position on which the depth of stitch retraction, ie the density of the knitted fabric, depends. When used in machines with a coarse needle cylinder division and where coarser yarns are also processed, then the resistance of the yarn needles will not allow the stepper motor to properly slide the retract lock, or maintain a stable height position of the lock. This also causes problems with resetting the engine when starting the machine. It is an object of the present invention to overcome these disadvantages.

SUMMARY OF THE INVENTION

The device according to the invention is characterized in that the eccentric is provided with a toothing in engagement with a pinion driven by a stepper motor, the eccentric having a stop which engages the pinion in one eccentric position and in the other position it contacts the position sensor.

It is further characterized in that the stop is designed as a flat diaphragm arranged perpendicular to the pinion axis engaging a gap in the optical position sensor arranged on the stepper motor flange in the second eccentric position.

It is also characterized in that the flat orifice is arranged on the eccentric in the space between its toothing and the stepper motor flange.

BRIEF DESCRIPTION OF THE DRAWINGS

1 shows a plan view of the device in a partial horizontal section, FIG. 2 is a front view of the shutter when it is in contact with the pinion, FIG. Position sensor.

DETAILED DESCRIPTION OF THE INVENTION

-2 Known small diameter circular knitting machine for the production of sock goods is equipped with a device for individual control of the stitch depth in individual knitting systems. This device comprises a stepper motor X mounted on a stand 2 of the knitting system. The stepper motor X is connected to the machine's electronic control system. A pinion 3 is mounted on the shaft of the stepper motor and is in engagement with the toothing 4 formed on the eccentric 5. The number of teeth of the pinion 3 and the toothing 4 indicates the gear ratio of the gear, in the given ratio 1: 2. The eccentric 5 is rotatably mounted in the vertical part of the stand 2. A roller 51, which fits into the horizontal groove 6X of the slider 6, is mounted on its face off its axis. The slider 6 is axially displaceably disposed in the cam sleeve 7 (FIG. 2) of the knitting system. A retractable needle lock 8 is mounted on the slider 6, the known working edge of which controls the butts of the needles (not shown).

On the eccentric hub 5, beside the toothing 4 perpendicular to the pinion axis 3, a flat diaphragm 9 is arranged such that its lateral edge 91 serves as a stop against the cylindrical surface of the pinion 3. A position sensor 11 is fixed on the flange 10 of the stepper motor. the orifice 9 arranged in this space has clicked into its gap in the second position of the eccentric 5.

The operation of the device described above is as follows. According to a command from the machine control electronic device, the stepper motor X is rotated to secure the vertical position of the needle retraction lock 8. This is done by pinion 3 rotating the eccentric teeth 4 and its roller 5X either raising or lowering the slider 6 and hence the retract lock 8. Accordingly, the butts of the needles are retracted more or less deeper, thereby forming longer or shorter loops of the knit, which affects the density of the knit.

The Knitting Effects of the Knitting Stitches on the Needles respectively. the retract lock 8 is absorbed by a so-called "slow" gear ratio between the eccentric toothing 4 and the pinion teeth 3. Therefore, the stepper motor X does not rotate and the retract lock position 8 remains set according to the program. Limit positions of retractable lock 8, resp. of the stepper motor X are then determined by the position of the flat orifice 9. The flat orifice in its position by its side edge 9X hits the pinion 3 as shown in Fig. 2, thus ensuring a minimum height of the working edge of the retractable lock 8.

In the second position, the edge 92 of the flat diaphragm 9 is then inserted into the gap of the position sensor 11, as shown in FIG. 3, opening the circuit of the position sensor 11 and causing a home position of the stepper motor X to be recorded. Thereafter, the electronic control device of the machine inserts a correction value, thereby positioning the retract lock 8 in the home position.

• 9 »·· ···· 9« · <

9 · 9 9 9 9 9 * 9 • 9 9 9 9999 Ί «« 99

9 * 99 «9,999 · 9 · • 99,99 9,999

99 9 9 99 99

The advantage of the solution according to the invention is the simple arrangement of the means in a small space so that it does not create space requirements, and furthermore their use for several purposes. Technical equivalents of the compositions described may be used within the scope of the invention. For example, a mechanical or optical sensor may be used instead of a magnetic position sensor, and another type of stop, such as a rod type contacting the sensor lever, may be used instead of a flat diaphragm.

Claims (3)

Device for axial movement of a density lock of a knitting machine, in particular a small diameter for the production of sock or the like, which is supported on an axially sliding slider engaged with an eccentric driven by a stepper motor, characterized in that the eccentric (5) is toothed (4) in engagement with the pinion (3) driven by the stepper motor (1), the eccentric (5) being fitted with a stop which abuts the pinion (3) in one eccentric position (5) and in contact with the position sensor in the other 11). Device according to claim 1, characterized in that the stop is designed as a flat orifice (9) arranged perpendicular to the pinion axis (3) which fits into the gap in the optical position sensor (11) arranged on the flange (10) of the stepper motor (1) in the second position of the eccentric (5). Device according to claims 1 and 2, characterized in that the flat orifice (9) is arranged on the eccentric (5) in the space between its toothing (4) and the flange of the stepper motor 11).