IT8905219A1 - METHOD AND CIRCULAR MACHINE FOR HOSIERY AND KNITWEAR PERFECTED FOR THE CONSTRUCTION OF DESIGNED KNITWEAR - Google Patents

Description

knitting means, at least one ring surrounding the cylinder and carrying the elements for transferring the stitches from certain needles to other needles, said ring being driven to rotate with the cylinder and also to be angularly offset, both in advance , is delayed with respect to the cylinder itself and in any case with respect to a predetermined zero position.

DESCRIPTION OF THE INVENTION

The present invention? directed to a working method for the construction of patterned knitting or special knitting stitches by transporting stitches from certain needles to other needles on the same support member, and likewise to an improved circular hosiery and knitting machine for implementation of such a method.

The current circular hosiery machines single cylinder and with flat needles, as well as? the working methods practiced up to now on the machines themselves allow the execution of various kinds of patterned knitting through a selection of the operative aqhi on the cylinder and / or on the plate and / or a transfer of the stitches of knitting from some horizontal needles on the plate to run spondent the vertical needles on the 1iridro,

The known art provides for? the transfer of stitches between immediately adjacent and non-adjacent needles? able to allow the construction on single-cylinder circular machines of special types of knitting, such as for example the braid knit that can be made on straight machines, and involving a transfer of knitting stitches from certain operating needles to distant ones and vice versa precisely to obtain the braid effect.

Purpose of the present invention? instead that of proposing a working method and a single-cylinder circular hosiery machine that solve the aforementioned problem, allowing the construction of types of patterned knits, such as braid knits, never made on such machines, and also rib knit 2: 2 with the needles on the cylinder and on the plate.

To this end, according to the beamed method of knitting? practicable on single-cylinder circular machines with vertical needles mounted on the rotating cylinder, horizontal needles mounted on a plate above and rotating with the cylinder, sinkers mounted on the cylinder from the inside ver? on the outside, means for simultaneously rotating the cylinder and the plate through a return shaft, and means for selectively activating the needles on the cylinder and / or plate and is characterized in that it provides to transport, by means of additional transfer elements placed around the barrel, the stitches from certain needles or groups of needles of the barrel to other needles of the barrel which, in the direction of rotation, may precede or follow the needles from which they were initially transferred? mesh stitches. According to a peculiar characteristic of the method, the stitch transport is carried out by anticipating or delaying the angular position of the transfer elements with respect to a position of initial picking up of the stitches from the needles. Furthermore, by providing the same number of needles on the cylinder and on the plate and selectively transferring the stitches from the needles of the cylinder to those on the plate and vice versa? is it possible to build real rib knit?:?.

In turn, the perfected single-cylinder circular machine, in addition to the aforementioned traditional operating and functional means, comprises at least one ring surrounding the cylinder and carrying the elements or groups of elements for transferring the stitches from certain needles to other needles of the cylinder according to the above method. Said elements are constituted by punches or hooks oriented radially from the outside pour the needles of the cylinder at the height of the horizontal needles on the plate, and the ring that carries them? commanded both to rotate jointly with the cylinder and the plate and to be angularly offset, in anticipation or delay, with respect to the cylinder itself starting from a predetermined initial position.

More details of the finding will result more? evident from the following description made with reference to the attached indicative and non-limiting drawing in which:

Fig.1 is a sectional view of part of a circular single-cylinder hosiery machine;

Fig. 2 shows a plan view of the ring carrying the transfer elements around the cylinder:

Fig.3 shows in section the mechanism for controlling the rotation and phasing / displacement of the ring with transfer elements;

Fig.4 shows a needle of those mounted on the cylinder in a condition of interaction with a corresponding needle on the plate; And

Figures 5,6 and 7 schematically show as many different positions of certain groups of transfer elements with respect to the needles on the cylinder and on the plate (shown only in part).

In that drawing, with 10? generically indicated the cylinder of a circular hosiery machine carrying a plurality of vertical needles 11 and, at its top, sinkers 12 operating from the inside towards the outside of the cylinder. Above cylinder 10? mounted a traditional plate 13 bearing a plurality? of horizontal needles 14 turned from the center towards the outside and interacting with said vertical needles 11 for the construction also of rib knit with a desired selection, according to the known art.

The cylinder 10? driven in rotation by a motor apparatus - not shown, and the rotation of the cylinder? transmitted to the plate 13 through appropriate gears and a return shaft 15 -represented only in part in Fig.l- why? cylinder and plate rotate simultaneously and in agreement.

Coordinated with the cylinder 10 are means for an operative selection of the needles, means for controlling the sinkers interacting with the needles, means for raising and lowering the operating needles and means for feeding the thread (s) to the needles themselves in at least one station of work. Also to the plate 13 are coordinated some means for an operative selection and a command of exit and re-entry of the horizontal needles 14.

The needles 11 mounted on the cylinder 10 are of the type with a step along their shank, below the level of the tongue of the needle when? open. On one side of the shank of each needle 11? also? an elastic lamella llb is provided just below the step 11a -v.Fig.4-.

The vertical needles 11 and horizontal 14 are controlled to allow the transfer of the stitches from the first to the second, and also vice versa for certain processes, using both the step 11 a of the vertical needles 11 for the operation which allows the correct height of the thread 16 for its uptake by a horizontal needle 14, both of the lateral blade lb which ensures the approach and sliding of the horizontal needle 14 adjacent to the vertical needle currently spreading for the passing the same horizontal needle under the thread 16.

The structure here described of the machine can? be considered conventional and designed for the construction of plain, ribbed and patterned knits according to the usual techniques with selection of the needles 11, 14 on the cylinder and /? on the plate.

The invention now aims at equipping such a machine structure to be able to perform other knitting operations, never performed on circular hosiery machines, increasing the types of knits that can be produced.

In fact, by mounting an equal number of needles on the cylinder and on the plate, selectively excluding certain needles from the work and transferring stitches from vertical to horizontal needles and vice versa? You can build with the two sets of straight and reverse rib knit needles with variable selections, such as the 2: 2 rib knit.

Then, according to the invention, at least one ring or more is mounted around the cylinder of the machine. preferably, as shown in the drawing (Figs. 2 and 3), two rings 17,18, coplanar at least in part and acting as a bed for transfer elements 20,21 intended to transport the stitches from certain needles or groups of needles to other needles always on the cylinder.

The transfer elements 20, 21 consist of hooks or the like mounted in radial grooves 19 made on said rings 17, 18, facing from the outside towards the needles 11 of the cylinder at the height of the horizontal needles 14 on the plate and which can be removed radially by means of respective control chambers 22. The transfer elements or hooks 20, 21 are arranged in groups each containing a plurality of elements. of elements corresponding to the areas of the knitted product where the special processing must be performed. The number of groups of hooks and the number of hooks in each group can be undefined; the needles on the cylinder not interested in interacting with said transfer hooks can instead knit normally and therefore also knit in ribs as referred to above.

In the example shown in the drawing, four groups of hooks are provided, of which two first groups of hooks 20 mounted on a first ring 1.7 diametrically opposite each other, and two second groups of hooks 21 mounted on the second ring 18, diametrically opposite each other. them and interspersed between the first two groups, each group comprising six hooks.

Both rings 17,18 carrying the hooks 20,21 are commanded to rotate simultaneously and in agreement with the cylinder and also to be displaced and angularly positioned around the cylinder, i.e. out of phase in advance or behind the cylinder itself, a ring independently from the other also to make the groups of hooks 20,21 work differently.

For their rotation, the rings 17,18 have a peripheral toothing 17a, 18a, and are each individually actuated by a relative added mechanism 23, respectively 24, controlled by the transmission shaft 15 of the rotation from the cylinder 10 to the plate 13. Pi ? precisely, each mechanism 23,24 comprises a gear train with a first driving gear 25 keyed to the transmission shaft 15 which drives, through other idle intermediate gears, designated in succession with 26,27,28,29 in Fig. 3, a gear final 30 meshing with the external toothing of the corresponding ring 17 or 18. Each gear? contained in a relative support box 23a, 24a mounted idle and rotating around the transmission shaft 15, box which connects through a connecting rod 31 and a screw coupling 32 to a stepper motor 33 which governs and controls the rotation of the mechanism around the shaft 15 cos? to be determined, through the gearing 25-30, an angular movement of the corresponding ring in order to phase or phase out, in advance or in delay, the same with respect to the cylinder.

Obviously, the mechanisms being independent allow the two respective rings 17,1B and the groups of hooks 20,21 from them to be governed differently.

carried while they rotate with the cylinder and to adjust, with the help of the stepper motors 33, the degrees

offset of the hooks with respect to the needles of the

cylinder starting from a predetermined position of

phasing or "zero".

All this makes it possible to implement the processing method which envisages using the hooks 20,21

to take the stitches from certain needles or

groups of needles 11 of the cylinder and transport on other needles of the cylinder which precede or follow those

from which the points were initially taken

cos? to form a stitch with the involved needles

having a particular effect, such as mesh a

braid while the remaining needles can work

normally making the desired stitch possibly with the help of horizontal needles.

In Figs. 5,?> And 7? schematized the movement

rings 17,18 and with it hooks 20,21

with respect to the needles 11 on the cylinder predisposed, for? ex. , to build 2: 2 stitches with the needles on the plate, the vertical and horizontal needles out of work

those being represented by a dot. In said

figures the hooks of each group are indicated

with the letters a, b, c, d, e, f and the cylinder needles with A, B, C, D, E, F ... etc. In Fig. 1? illustrated for example a phasing or zero position of the rings 17,18 with respect to the cylinder, position in which the hooks a, b, c, d, e, f correspond to the homologous needles A, B, C, D, E , F. In this position, the hooks 20, 21 or some of them can be controlled to take the stitches from the corresponding needles A, B, C, D, E, F. Then the rings 17,18, or each ring independently of the other, as they rotate with the cylinder, can be displaced angularly with respect to the cylinder so? the hooks a, b, c, d, e, f from the needles A, B, C, D, E, F to be removed, by placing them in advance or late. The phase shift of each ring? controlled and regulated by the stepper motors 33. Then the stitches starting from the hooks can be transferred to other needles other than those from which they were taken. What? for example, with the s-phasing of the hooks in one direction with respect to the cylinder, it is possible to transport the stitches taken with hooks a, b, c from the needles A, B, C onto the needles D, E, F c? m and represented in Fig. 6, while with a phase shift in the opposite direction it is possible to transport the stitches taken with hooks d, e, f from needles D, E, F onto needles A, B, C as shown in Fig.7.0v gradually adjusting the phase displacement between the two predetermined extremes, even independently, of the hooks on one ring respects those on the other. to obtain any combination of transferring the stitches from certain needles of the cylinder to others, within the angle affected by the hooks, to create the desired knitting pattern, and this is the case. at each rotation or at each determined number of rotations of the cylinder.

Claims (1)

R I V E N D I C A Z I O N I 1 ') Processing method for the construction of a design fault, such as braid knitting, by transporting knitting points from certain needles to other needles on the same support, a method practicable on single-cylinder circular machines with vertical needles mounted on the rotating cylinder, of the horizontal needles mounted on a plate above and rotating with the cylinder, of the sinkers mounted on the cylinder from the inside towards the outside, of the means for simultaneously activating the cylinder and the plate in rotation, and of the means for selectively activating the needles on the cylinder and / or on the plate, characterized in that it provides to transport, by means of additional transfer elements placed around the cylinder, the stitches of knitting from certain needles or groups of needles of the cylinder to other needles of the cylinder which, in the direction of rotation, they can precede or follow the needles from which the stitches were initially transferred. 2?) Method according to claim 1), characterized by the fact that the additional elements are controlled to take the knitting points on corresponding needles of the cylinder, to retreat while retaining the picked points, and to bring them back to other needles after an angular phase shift of said elements in relation to the cylinder. 3? ") Method according to the sales D and 2), characterized by the fact that the transport of the stitches is carried out by anticipating or delaying the angular position of the transfer elements with respect to the initial pick-up position of the stitches d? knit from needles. 4 ') Method according to the preceding claims, which provides for arranging an equal number of needles on the cylinder and on the plate and for selectively transferring the stitches from certain needles of the cylinder to corresponding needles of the plate and from other needles of the plate with corresponding needles on the cylinder for the construction of rib knit also with selection 5 - "'-) Circular sock machine comprising vertical needles mounted, horizontal needles mounted on an overlying and rotating plate with the cylinder, sinkers mounted on the cylinder from the inside outwards, means for simultaneously rotating the cylinder and the plate through a return shaft, and means for selectively activating the needles on the cylinder and / or plate, characterized by the fact to further comprise at least one ring (17,18) surrounding the cylinder and carrying the elements or groups of elements (20,21) for transferring the stitches from certain needles to other needles of The cylinder according to the method according to claims 1), 2) and 3), and by the fact that said ring? commanded both to rotate jointly with the cylinder and the plate and to be angularly offset, in anticipation or delay, with respect to the cylinder starting from a predetermined initial position. 6?) Machine according to claim 5), in which said transfer elements are constituted by hooks or punches oriented radially from the outside towards the needles of the cylinder at the height of the horizontal needles on the plate, said hooks or punches being arranged in groups each group comprising an indefinite number of hooks on said ring surrounding the cylinder, in correspondence to the areas where the transport of points is to be carried out. 7's) Machine according to claims 5) and 6), in which two coplanar, independent rings (17, 18) are provided, each carrying one, two api? groups of transfer elements (20, 21) spaced angularly. 8 '? ") Machine according to claims 5) to 7), in which said rings (17,18) carrying said transfer hooks (20,21) are individually rotated by a mechanism that receives motion from the shaft gearbox (15) between the cylinder and the plate of the machine, said mechanism comprising a gearing (25,30) with a first driving gear (25) keyed to said idler shaft (15) and with a final gear (30) meshing with a peripheral toothing (17a, 18a> integral with the ring to be controlled. 9 ') Machine according to claim 8), wherein said gear (25,30)? mounted in a box <23a, 24a) mounted idle and rotating around the transmission shaft (15), and in which laterally to said box (23a, 24a)? a stepper motor (33) is connected to move and angularly position the mechanism around the shaft and cause a partial rotation of the respective ring (17,18) through the gear train for the phasing / displacement of the latter and of the hooks on it with respect to the ci 1indro, 10?) Machine according to claims 1) to 9), in which the needles on the cylinder are of the type with a shank provided with an intermediate step and an elastic lateral tongue at an internal level with respect to said step. 11) Method and circular machine for perfected hosiery and knitwear for the construction of patterned knits, as substantially described above, illustrated and claimed for the specified purposes.