CS271599B1 - Mechanical pulling-off equipment - Google Patents

Abstract

The invention relates to a mechanical take down device in a circular, particularly double cylinder knitting machine. The device consists of two circular parts (10, 11), where one (11) of them is full and fits into the other part (10), while the fabric (P) passes between them. On one of the parts is formed a screw-like surface (110) and neighbouring surface of the other part is circular and its slant equals that of the screw-like surface. One of the parts does not rotate, while the other forcedly rotates and is coupled with the needle cylinder (1).

Description

BACKGROUND OF THE INVENTION The present invention relates to a mechanical take-off device for a circular knitting machine, in particular a two-cylinder machine, comprising two coaxial circular parts.

It is known that on two-cylinder circular knitting machines for the production of sock goods various types of mechanical take-off devices are used for the removal of goods.

Machines are known as described in the invention in accordance with U.S. Pat. No. 185,999, wherein the exhaust device comprises vertically displaceable working elements arranged in a circle. The vertical movement of the working elements is controlled by a fixed cam and springs. The working ends of said elements are designed as flexible blades. This device works quite reliably except for the removal of the jacquard knitted fabric, where longitudinal strips are sometimes visible. These strips are formed by uneven exhaust between adjacent working elements.

The aforementioned disadvantage is eliminated by the draw-off device described, for example, in the document according to the author's certificate No. 221 149, which has a draw-off mandrel which catches the knitted fabric during knitting and then pulls it off by the pneumatic device. This device essentially eliminates longitudinal grooves but is rather complex, occupies space and requires the introduction of compressed air onto the machine. Furthermore, it has the disadvantage that it does not allow the knitting of tights due to the stroke of the device, or the stroke can be performed twice, but at the expense of the time to knit one knit. When knitting goods with low density, ie high expansion, the goods cringe.

SUMMARY OF THE INVENTION It is an object of the invention to overcome the above-mentioned disadvantages, which is essentially achieved in that one panel has a helical surface formed on its surface in contact with the β knitted fabric and one of them is rotatably arranged.

The advantage is that the device is very simple and easy to use and service. By acting continuously throughout the circumference of the knitted fabric, it completely prevents the formation of longitudinal grooves and allows practically knitting endlessly long knits, thus replacing the roller draw. The device does not need to be adjusted, does not wear, which guarantees its long service life. Malfunctions caused by the function are also completely eliminated. The device can work as upper and lower exhaust.

Furthermore, it is advantageous in terms of the quality of the goods that the helical surface of one panel has the same inclination as the circular surface of the other, the two panels being designed to fit together, one being solid and the other with central resistance for the fabric to pass. This arrangement smoothes the knitted surface.

Furthermore, it is advantageous from a constructional point of view to capture the origin of the article when one of the panels is arranged axially displaceably.

Therefore, furthermore, from a constructional point of view, with a bottom or top flue, it is advantageous if the orifice is firmly connected to the needle cylinder, for example the lower and the second solid part is slidably mounted in the second needle cylinder.

Further, from a design and manufacturing point of view, it is advantageous if the screw surface is formed on the solid component or the screw surface is formed on the component and through the central hole.

The device according to the invention is shown in the accompanying drawings, in which: Fig. 1 shows schematically the arrangement of the exhaust in a working position on a two-cylinder circular knitting machine; Fig. 2 shows a detail of both exhaust components in a non-working position; Fig. 4 is a detail of the exhaust in a non-working position, where the working surfaces are formed on the basis of cylindrical surfaces; Fig. 5 is the same as Fig. 4, but the elements are in the working position; another embodiment of the two panels in the operating position, FIG. 7 is a bottom view of the screw face of the top panel of FIG. 6, and FIGS. 8, 9 are the same as FIGS.

CS 271599 Bl

Known two-cylinder circular knitting machine for the production of sock goods It is provided with a lower and upper needle cylinder 1, 2, which holds double-head needles 3 and other known sinkers (not shown) for controlling needles 3. with the sinkers 4 _ovlád and in the upper needle cylinder 2 with solid cast sinkers 5 »Drop sinkers 3 They are actuated by fixed lock rings 6, 7 fixedly fixed on the non-rotatable tube β.

The machine is equipped with a mechanical exhaust system containing the following components. In the lower needle cylinder 1, a component 10, which is funnel-shaped with a central opening for the passage of the article, is fixedly mounted on the inner rotating withdrawal tube 9. The upper needle cylinder 2 has an axially displaceable portion 11, the working portion of which is formed as an outer conical helical surface 110. Both components 10 and 11 fit together, with the inner conical surface 100 of the component 10 sloping correspondingly to the conical helical surface 110. 10 and 11 are arranged coaxially, the member 11 being rotatably and displaceably mounted in rings 12, 13 fixedly arranged in the inner tube 14 of the upper needle cylinder that rotates therewith. A lever 15, pivotally mounted in a stand 16 on the upper flange 17 of the machine, is attached to the upper end of the panel 11. The second lever arm 15 is controlled by a kinematic transmission (not shown) from the machine drum.

The operation of the device described above is as follows. At the beginning of knitting knitwear, ie.

in the hem, the panel 11 is lifted so that the device is out of order. The knitted fabric P becomes, due to the laying of the elastic thread and extends to the center. 10. By turning the knit, P actually screws into the surface of the tapered helical surface 11Q, and is thereby stretched and pulled away from the needles. After the knitting is completed, the panel 11 is lifted by the command drum and the knit is dropped in the needles.

Various modifications may be made within the scope of the invention. The function of the panels 10 and 11 can be reversed. A conical surface 110 'is formed on the upper panel 11' and a conical surface 100 'on the lower panel 10'. Upon engagement of panel 11 * with panel 10 *, the knitted fabric is stretched and pulled by panel 10 *. A further modification without changing the nature of the solution is that the rotatable bearing is changed. The lower panel 10 and 10 *, respectively, are arranged non-rotatably and the upper panel 11, 11 * is arranged as driven.

Furthermore, the surfaces on which the panels abut each other need not be conical, but can be, for example, of cylindrical shape as seen in panels 11a, 10a in Figures 4 and 5, or they can be formed on adjacent planar faces of panels 11b, 10b.

Further, the draw-off device may also be provided for the upper draw-off, with the orifice panel, for example the panel 10 being arranged in the upper needle cylinder and the solid panel, for example the panel 11 in the lower cylinder. In this case, it is possible for the solid part in the epodial needle cylinder to be axially non-movable and the part with the opening for passing the article to be axially displaceable.

The device according to the invention can also be used on single-cylinder knitting machines and also on large-diameter machines. ’

Claims (6)

SUBJECT OF THE INVENTION Mechanical withdrawal device of a circular knitting machine, in particular a two-cylinder machine, comprising two coaxial circular withdrawal parts, characterized in that one part has a helical surface (110, 100 *) formed on its surface in contact with the knitted fabric (P). them is arranged rotatable · Mechanical pull-off device according to claim 1, characterized in that the helical surface (110, 100 *) of one component has the same inclination as the circular surface (100, 110 ') of the other, both components (10, 11, 10 *). 11 ', 10a, 11a) They are formed so that they fit together, one being full and the other being the central opening for the passage of the article. Mechanical exhaust device according to claim 2, characterized in that one of the components (10, 11, 10 ', 11 *, 10a, 10b, 11a, 11b) is arranged axially displaceably. Mechanical pull-off device according to Claims 1, 2 and 3, characterized in that the orifice (10, 10 ', 10a, 10b) is rigidly connected to the needle cylinder (1), for example the lower and the second solid (11). 11, 11a, 11b) is slidably mounted in the second needle cylinder (2). Mechanical pull-off device according to claim 4, characterized in that the helical surface (110) is formed on a solid part (11) *. Mechanical pull-off device according to claim 4, characterized in that the helical surface (100) is formed on a panel (10) with a central bore ·