KR920004242B1 - Mechanisms for selecting and controlling the needles of knitting machines and needles therefor - Google Patents

Abstract

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Description

Mechanisms for selecting and controlling the needles of knitting machines and needles therefor

1 is a cross-sectional view of the device.

2, 3 and 4 schematically show the state of the device when forming four bodies and the exchange of yarns between two bars when forming eight legs.

5, 6, 7 degrees of the bar of the plate, the detail of the bar of the cylinder.

8, 9 show the components for the selection of the needle selector on the counter rotating device and the stationary part.

10, 11, 12 and 13 show the appearance of a selection cam of two needle bars in two operating states, respectively.

14 and 15 show stockings made to a predetermined shape.

FIG. 16 shows the working zone by the needles of two bars that are activated and crossed in the state of starting the toes and ending the clutch zone.

FIG. 17 schematically shows the actual state of thread exchange during trunk formation. FIG.

18 shows an electromagnet embodiment of a needle selection control.

* Explanation of symbols for main parts of the drawings

1: fixed structure 3: center element

5: annular element 10: plate

11: cylinder 13,15: needle

116: Vibration Jack 118: Hill

120,122: cam 124: strip

The present invention relates generally to knitting machines, and more particularly to knitting machines of stockings and pantyhose.

It is an object of the present invention to reduce the risk of breakage at the stage where the needle is inactively engaged with the stitch by selecting and controlling the needle to prevent pressing the stitch forming thread as much as possible. Another object of the present invention is to select and control a needle requiring a relatively limited space, which is the basis for radially arranged needles. The above objects and other advantages will be apparent from the following description and the accompanying drawings.

According to the invention, at least one needle bar is formed of a bed positioned side by side in a sliding channel, selecting and controlling the needles of the knitting machine having parallel edges to guide the stack of needles that can slide in each channel. In a mechanical arrangement, the needle has a heel that does not interact with the stitch forming cam, and a stack selector or jack, which is coplanar with each needle, is housed in the channel and is attached to the needle for the purpose of angle conversion with respect to the needle. Bonded, the jack or selector in the same plane as the needle has at least one heel that can protrude and degenerate against the bed to be active and inactive, respectively, with respect to the stitch forming cam.

In practice, the jack or selector is joined to the needle by engagement created by a complementary member with arched recesses and protrusions.

The jack or selector extends to form a rocker arm by joining at an intermediate position, with the heel at one end while the opposite end protrudes from the channel to accommodate the pushing control to insert the opposite end into the channel and protrude the heel. .

In order to act on each vibration selector, the device controls one arm with an individual electromagnet, including a vibration trigger, mounts a plurality of electromagnets to the selector on the same bar, and the space for each magnet is a gap between the continuous needles. Will be larger than the allowed space.

The device is also provided with a slide selector having an inclined side which acts on the opposite end in the same needle channel.

Another object of the invention relates to a needle for a knitting machine, which is a transformation for a heel interacting with a stitch forming cam, consisting of a stack selector or jack coplanar with the needle, which can be received in the same channel as the needle, At least one joined to the needle for the purpose of angular transformation with respect to the needle, the jack or selector being protruded and degenerated in the angular transformation of the jack or selector such that in the same plane as the needle, the jack or selector is active and inactive with respect to the stitch forming cam respectively; Has a heel.

In practice, the jack or selector is joined to the needle by a defect caused by a complementary member with arched recesses and protrusions, and the jack or selector extends to form a rocker arm by joining at an intermediate position. , While having a heel at one end, the opposite end protrudes from the channel to accommodate pushing control to try to insert the opposite end into the channel to protrude the heel.

The present invention will be described in detail below with reference to the accompanying drawings.

1 is a main part of an apparatus showing the whole machine structure, in which 1 denotes a fixed structure. The structure 1 supports the plate-shaped bar 10 and the cylindrical bar 11 for the needles 13 and 15 via the central element 3, the annular element 5, respectively. 17 transmits the movement to the pulley 19 mounted on the exercise absorption shaft 20 via the toothed belt as a motor, and then rotates the absorption movement to the two cylindrical gears (21) and (22). send. The gear 22 transmits motion to the toothed wheels 23, which are mounted on a large bearing 24 supported on the structure 1. The wheel 23 supports, for example, a device 26 that rotates continuously counterclockwise with respect to the cylinder 11, and the device 26 vibrates the selector against the needle 15, as described below. It rotates with respect to the cylinder 11 which supports and fixes the selection cam. The gear 21 rotates counterclockwise (as opposed to the movement direction of the toothed wheel 23) via an idle middle gear composed of two coaxially coupled gears 25 to reverse the direction of rotation. The movement is transmitted to the gear 26 coupled to rotate the center shaft 27.

At the top of the shaft 27 a disc shaped support 28 is fixed, which rotates in the opposite direction of the device 26 and is mounted to the bearing 30 accompanying the top of the center 3 of the structure 1. Ring 29 is provided. The ring 29 carries a device 32 which is grooved to receive a vibration selector against the needle 13 and which rotates with respect to the cylinder 9 supported by the plate 10 as described below. 32 supports the control cam against the selector.

The shaft 27 transmits motion to the device 32 supporting the cam of the plate and moves axially to raise the plate 10 coupled with the cylinder 9. The vertical rise of the shaft 27 receives the disk 34 fixed to the sleeve 35 by a ring 29 via the bearing 30 and slides it on the center guide support 3 of the structure 1. The plate 10 coupled with the cylinder 9 is raised. The normal positioning of the shaft is achieved by the support on the plane 1A of the structure via the thrust bearing 36 and the disk 37. Therefore, the rise of the shaft 27 and the plate 10 is obtained by the pneumatic cylinder / piston system 38 when a slight rise is required to several tens of millimeters, which is well known when the so-called elastic double rim is executed. Is essential.

On the other hand, the rise of the larger plate 10 (approximately 100 mm) is used when the device needs to stop and test the device between two bars, which rise is obtained by the pneumatic cylinder / piston system 39. In addition, a cylinder / piston system 38 is provided to elevate the entire set including the disk 3 and the plate 10.

The superstructure 1C supports the thread release device 463, which is attached by the support 41 to be accompanied by the disk-shaped member 40. As shown in FIG. The thread from the thread release device 463 is guided to the ring 458 before being pinched by the needle, which is supported by the superstructure 1C via the arm 1E. The support 1F of the fixing structure i supports the cutting and holding tweezers 483 for restraining and supplying the greenhouse in the unwinding device 463.

The other support, such as the member 1G connected to the arm 1E and / or the fixed structure 1, supports a fixed selection group such as 225, etc., which is provided with two reverse rotating devices 26 and 32. It is arranged outside.

Each of the suction ports 43 extends along the arc of the needle needed to form the finished product and is open in the cylinder 11 between the cylinder 11 and the edge of the plate 10, these ports 43 being formed It extends as a pneumatic duct 43A for the suction air flow necessary for the pneumatic expansion of the product to be separated from the pneumatic extension of the product.

The various assemblies can be controlled by interlocked actuators and motors, the various motors having special steps to exclude any supply of speed fluctuations, especially when starting or ending the clutch, forming the body, and the like. The steps are controlled by a program that ensures speed reduction in a timely manner.

Other components of the device will be described in detail below with reference to the accompanying drawings.

With respect to the conventional apparatus, the tips of forming the stitches, namely the needles and the sinker tip, are substantially the same as the apparatus. In a particular non-limiting manner, the fixed sinker is the same as the twentieth degree of the conventional apparatus, and the difference from this apparatus is as follows.

1) Needle part (heel) that supplies movement by acting on cam

2) Needle selection part that adopts specific vibration selector or electronic selection system

3) Selective control means controlled by an electronic system equipped with an electronic pneumatic servo system

4) A cam that acts to raise and lower the needle when forming a stitch.

They are placed in two sets of thread feeders and are fixed to the devices which rotate in succession, respectively, except for the small upward movement of the cam to stitch to adjust the stitch length.

5) Actual Supply System

As described above, the mechanical apparatus of the present invention is a circular mechanical apparatus having a large diameter circumference capable of accommodating a plurality of products, such as a pair of stockings each having a torso and two legs, and in the following embodiments, Although an apparatus for simultaneously producing four stockings is described, the apparatus may also produce a plurality of different products at the same time.

In FIG. 2, C1-C2-C3-C4 is the cross section of the body for four stockings, separated by voids along the two circular needle bars forming them. FIG. 3 is a cross-sectional view of the legs of four stockings with G1X, G1Y-G2X, G2-G3X, G3Y-G4X, and G4Y, respectively, which are also separated by voids. 3 is a schematic view of the generally four sets of cams 46 for the cylinders and four sets of cams 47 for the plates extending externally and internally with two counterrotators 26 and 32. It is shown as. Further, in FIG. 3, the cam set is synchronized in these rotation directions to intersect the void space between one and the other of the four stockings. In FIG. 4, the reverse rotation camset has a clutch zone in the manufacture of the legs, i.e. the space between the legs G1X and G1Y, the space between the legs G2X and G2Y, i.e. 8 as seen in FIGS. Can cross in space. Therefore, the empty space between a pair of stockings and the other and the clutch zone of a pair of stockings have a circumferential opening that can accommodate the circumferential widths of the double set cams 46 and 47, respectively, the outside of the cylindrical product formed. The needle of the bar forming the zone and the bar forming the inner zone of the cylindrical product is controlled. Each set 46 receives two feed chambers and passes to set 47 and back to set 46 to form a continuous half row with the needle of the cylinder bar and the needle of the plate bar.

Stockings made in a given shape are schematically shown in FIGS. 14 and 15. The toes are formed starting from the finishes A, C, D, and B, and as shown in the section G1X, G1Y, etc. in FIG. 3, the corners of the toes are rounded after forming the legs. To this end, in relation to FIGS. 15 and 16, a number of completed stitch ends A, C, D, B are formed jointly with respect to both bars (i.e. simultaneously formed with the needle on the plate and the needle on the cylinder). Closing the toes, feeding the two bars with crossed needles simultaneously as shown in Figure 16, proceeding these stages A, B, C, D from A to B and using all the needles And ankles. Subsequently, the end P of the cylindrical knitted fabric is shortened to an increasing length using one bar and the other bar, for example, the length of the continuous end P at both ends, starting at the central portion CD of FIG. 15. Is increased symmetrically, and the increasing frequency is selected as the role of the side obtained in a predetermined shape. As a result, sections AC and DB that take the bends of the shapes shown in FIGS. 14 and 15 are obtained.

Subsequently, under the conditions shown in FIGS. 3 and 4, a cylindrical section having a predetermined width was formed, an ankle part and a leg part were formed, and the above section is shown as BE in FIG. After this part is formed, it is necessary to widen the legs in order to easily wear stockings. This is accomplished along section EF in FIG. 14, whereby the knit end produced in this section is gradually increasing and wider, and in order to be more efficient, in addition to the above, two bars of each are formed when forming sections E and F. The number of needles is gradually increased constantly during operation by inserting the needles simultaneously or alternately at the working arc end of the needle. After the section EF is completed on both legs, the operation is proceeded in the state of 2 and 17 in the state of 3 and 4 degrees so that two of the four supply devices 47 in the cylinder section and four supply devices in the plate section ( Two of 47) are withdrawn from the apparatus, i.e., the operation proceeds from the state shown in FIG. 3 to the state shown in FIG. In this position, a needle is operated between the two legs, ie the clutch zone of each stocking, and the zone is shown as section F-H in FIGS. 14 and 17 degrees. By removing two of sets 46 and 47, the combined feeder is also removed, so only four of the eight feeders are present. The needles in the F-H section are immediately introduced one to one alternately in each bar, and the two needles are staggered and crossed (FIG. 16) to form a finish as described for the toes in the F-H section. Advantageously, the needles of section FH are controlled together, or with one or two adjacent needles on the side from which the legs are made to prevent eyelet formation at the corners of section FH. Thereafter, cylindrical stocking of the section K-L is produced. In other words, the body is formed by using a needle belonging to the leg section to create a cylinder as wide as the entire stockings. The torso is shown as section L-M in FIG. After completing this section, an elastic strip or the like is produced in section M-N, and the strip is formed into an elastic warp of greater parameter by forming a double weave on the line MM. The fabric structure of such a double border is already known.

To execute the stage connecting the stitches soft to the ends of the initial finishing line ACDB and the clutches of the lines F and H with two crossed needles 13 and 15 of the bars 10 and 11 (Fig. 16). The following specific method is used. By selecting 1: 1, the needle 15 of the cylinder 11 is raised and the thread is not supplied. After this operation is performed, the needle 13 engaged with the raised needle 15A is selected to be 1: 1 and raised and lowered. At the same time, the thread drawn from the needle 13A is supplied to form a stitch on the stem of the needle 15A. Subsequently, the thread is fed to the needle 15A and lowered to form a stitch, the continuous end is formed with the needle 13, and the process is repeated until the cylindrical fabric is formed.

The machine produces four stockings at the same time, with four sets of double feeders for the cylinder needles and four sets for the needles of the plates, with a total of eight feeders in each case.

As can be seen from FIG. 3, which shows the state at the time of weaving the leg, the cam set is rotated 1/8 of the way (in the opposite direction) from the initial position, and then the cam intersects the clutch zone of the stocking, as shown in FIG. . The above mentioned intersection does not occur when the body is squeezed during operation, as the needle operates in the clutch zone as shown in FIGS. 1 and 17. It is formed by two feeder chambers rather than four for each of the stockings that are operated because only two sets of cams for cylinders and two sets for plates are used to form the body. As shown in FIG. 17, four cams are reduced for the cylinder and four for the plate.

5 shows a cross section of a bar existing in the working zone of the needle, in particular the cross section of the plate 10, in the circular device of the present invention, the cross section of the cylinder 11 being partially shown in the working zone. As described above, a groove for radially sliding the needle 13 of the plate and a vertical groove for sliding the needle 15 of the cylinder are formed.

The needle 13 formed on the plate 10 acts on the thread with a bee and a tongue according to a conventional method, but the needle sack has a projection 114 of a circular side unlike a conventional bag. The protrusion 114 acts as a support and a junction for the small vibration selector or the jack 116, and for this purpose, a cavity 117 having the same circular side surface is formed at the intermediate position so that the protrusion of the body of the needle 13 is formed. 14), the needle 13 is engaged and vibrated and the jack 116 is always connected because it is held in the sliding channel of the needle. A heel 118 is formed in the front portion of the vibrating jack 116 to operate with the cams 120, 121, 122 to control the needles centrifugally and centripetally radially. The heel 118 shown in FIG. 5 protrudes into the active position 118X and is controlled by the cams 120 and 122 and can be pushed in, pushing the push strip 124 acting on the upper edge of the heel. It is fully driven into the sliding channel of the needle by the action of, and as a result, the cams 120 and 122 do not work. When the jack vibrates and the heel 118 protrudes into the active position 118X, the cams 120 and 122 do not operate. When the jack vibrates and the heel 118 protrudes to the active position 118X, the cams 120 and 122 act on them, and are converted into the centrifugal force direction f13 or centripetal force direction by these sides and the movement Provided to the heel 118 and in connection with the pivot 114, the jack 116 receives the needle 13 to create the necessary travel to grab the thread and form the stitch.

Therefore, the device formed by the needle 13 and the vibrating jack 116 is operated or excluded, and the heel 118 is raised or lowered by the operation according to the respective arrows fA and fB. According to fB, it is excluded by the strip 124 acting to return to the cam 122 or the like when the needle is in the centripetally retracted (lower) stop position in FIG. The raising of the heel 118 by the action according to fA is performed by the selection member described below. The plate 10 (as in the case of the cylinder 11) is fixed, and the cams 120, 122 and the strap 124 are mounted in a device that rotates in a continuous motion. By controlling the cams 120 and 122, the heel 118 is raised by a selection member composed of two rows of toothed vibration jacks 126 as shown in FIG. These jacks 126 are received in the grooves of the body fixed to the plate 10 and hold them with springs 128 which cause them to vibrate about the intermediate bearing point. A jack 126A having a heel of each jack 126 operates in the fA direction corresponding to the jack 116 to protrude the heel 118. Each jack 126 mounted perpendicular to jack 116 has two sets of teeth 126B and 126C, one above the strut and the vibration point and the other below. The lower set of teeth 126C activates the jack so that the pressure by the selector lever on the teeth 126C results in the jack 126 entering the lower portion of the channel and leaving these upper portions and the thrust heel 126D above the cam 130. And the side lowering the jack to engage with fA. The upper teeth 126B act only to partially delete the selection formed by acting on the lower teeth 126C in advance. The jack 126 of the plate is placed on the cutting surface which is placed on the plate 10 and formed in the fixed cylinder 9, and as each jack 126 moves, the radially inner portion of the small vibration jack 116 in accordance with fA. Lower to the appropriate position and compress.

The same system is installed for selection in the cylinder 11, and the vibration selection jack 132 is mounted on the same plane as the needle 15 of the cylinder, each with a heel 138 like the jack and heel 116. Corresponding to the vibration jack 136 (as in the case of the needle 13), but is mounted in the same groove as the needle 15 and the jack 132. Cams, such as cams 140, 329, 381, and the like interact with the heel of the jack 136 for each rise and fall. Vibration of the jack 136 protruding the heel 138 is achieved by sliding the jack 132 in accordance with fA1, as a result, the inclined plane 132A of the jack 132 raises the jack 132 It acts on the edge of the jack 136 if it is from the position shown in Figure 6 to the position of Figure 7 according to fA1. For the selection of the jack 132 (needle 15) there are provided two sets of teeth 132B, 132C and a heel 132D on which the cam 144 can act in the same way as the cam 130.

6 and 7 show a group of selector levers, which are mounted on two reverse rotating devices 26, 32, and with tooth set 126B, 126C, 132B, 132C for selection. And a group of selector levers protrude from the respective mechanisms 148, 150, 152, and 154, as described below. 8 and 9 degrees, they are pushed into respective slice lamps and vibration channels to actuate vibration jacks, such as jacks 126 and 132.

FIG. 8 is a plan view of a mechanism 152 or the like having a group of selector levers 217, the lever 217 of which pushes the selector 132 toward the bottom of the sliding channel in the cylinder 11; Let it run The lever 217 of the group of levers of the mechanism 152 is mounted to the pin 219 and vibrates against it and is urged by the spring 220. The entire structure is mounted on a support plate 221 fixed to a suitable rotating device for carrying a cam for controlling the sliding of the selection needle, and the group of selection levers 217 rotates in the cylinder and all the selector levers 132 ( And jack (126)). A series of triggers 222 squeezed by a spring 223 is also mounted to the plate 221 and acts with one tooth in each case, in combination with the corresponding selection lever 217 to remove the lever. The cylinder is moved by the action of the trigger 224 which can move the selection lever from the position shown in FIG. 8 to the position shown in FIG. The active position (Fig. 8) of the selection lever can be set by adjusting the eccentric feet 121A mounted on the plate 121. FIG.

A single or plural means for controlling the selector levers of the mechanisms 148, 150, 152, and 154 is fixed support 225 (see FIG. 9) coupled with the arm 1F (FIG. 1). Acts on the trigger 122 passing through these front surfaces by means mounted on it. These means consist of a lever 226 that vibrates with respect to the pin 227, and as shown in FIG. 9, when the selective thrust according to f228 is directed towards the cylinder and toward the trajectory of the selection lever, the lever is selected lever 217. Each lever 222 is rotated to disengage). The selection lever 217 is urged by the spring 220 and selects the selector 132. That is, the lever 226 is the same as the lever 217 in number (this applies to all the mechanisms, 148, 150, 152, 154) and is flush with the selection levers and these Acts on the stomach Each lever 226 is controlled by a pneumatic cylinder 228 sandwiched between solenoid values excited by an electronic program for the action of the spring 230. The side of the lever 226 is gradually operated over the appropriate trigger 222 to release and activate the selector 217.

In order to push out the selection levers such as the lever 217, the trigger 224 is operated according to f224 to couple the selection levers to the respective levers 222, and the arm 232 is installed to control the trigger 224. Actuator 228 against the action of the opposing spring, which is selectively retained in the protruding position by the spring 234 and is selectively actuated by a strip 236 connected to a fixed structure (such as the support 225, etc.) at 238. To pneumatic actuator (240).

The selection of the needles by the small vibration jacks 116, 136 can be accomplished according to other systems described below.

FIG. 10 is a view showing a cam that operates to move a needle on cylinders 132 and 136 of a cylinder needle. The state and movement of the heel are represented by fT, but the actual cam slides in the opposite direction.

The upper part shows the state of the cam acting on the heel 138 to raise and lower the needle 15 and the lower part shows the state of the cam for the vibration selector 132.

The cams 329-330-331-332-333 for the needles are microvibrated so that the heel 138 protrudes from the sliding channel of the needle via the heel 138 of the small vibration jack 136. Since the jack 136 only works when rotated, it can engage the aforementioned cam along the line 334. When the heel 338 of the jack 336 is shielded in the sliding channel, the level of the line 334 is maintained without interacting with the cams 329-333, so that the corresponding needle continues lower and holds the thread. Do not. As described above, vibration of the jack 136 to protrude the heel 138 is obtained by the rise of the selector 132, which is applied to the dual leveling cam 334 acting on the central heel 132F of the jack 132. Return to the lowered position by Since the rise of jack 132 occurs when the lower portion of the jack is vibrated to protrude from the cylinder, heel 132D may engage the cam 144 or other cams 336, 337. The cam 144 that raises the selector 132 produces a rotation of the jack 136 so that the heel 138 and the cam 329 come into contact so that the cam and the corresponding needle rise. Cam 336 raises the needle to cam 330, and cam 337 may cause the needle to rise to cam 332. In FIGS. 8 and 9, the selector lever, such as lever 217, is a lever group 317 for cam 144: lever group 338 for cam 336: lever for cam 337. As with the group 339, the selector 132 is engaged with the raised cams 144, 336, and 337, and the lever group 318 excludes the jack 132 from the active position.

Cams 329, 330, 331 to the needle of the cylinder form a first feeder, with selectors 144, 336 with lever groups 317, 318, 338, respectively. Depends on the cam. Cams 332 and 333 to the needle of the cylinder form a second feed device, which depends on 337 with lever group 339. The cams 329, 330, and 332 are ascending cams for forming the city teeth, and the cams 331 and 333 are ascending cams. In normal operation, the second feeder is fed to two different yarns and the cams 329 and 331 are shown in FIGS. 6 and 7.

As can be seen from the top of FIG. 10, the sides 340 and 341 were lowered by the cams 331 and 333 when the tip of the needle was raised by the cams 329 and 332. It shows the running of the time.

The hooks 342 and 343 denote real means for each of the first and second feed devices (relative movement of the heel and needle along the ft, in fact the reverse movement of the cam). The dashed lines 344 and 345 indicate the positions of the threads supplied to the needles by the thread guide hooks 342 and 343.

FIG. 11 is an exploded view of a cam acting on the heel of the selectors 116 and 126 with respect to the needle 13 of the plate 10, similar to that of FIG. 13 is horizontal, not vertical, as the selector 126. In addition, these configurations are bent as indicated by the line LP, which shows the development of the cam and the orbit which is circular with respect to the center and axis of the plate. The top part of the figure shows that the cam 130 acts on the heel 126D of the selector 126 and presses them down. The assembly as a whole is reversed so that the selector 126 is pushed downward so that the tip 126A on the selector 116 is pressed. ) Side 384 is aligned with heel 126F such that selector 126 moves along ft relative to the cam (but the cam is in the reverse direction). Trigger sets 368, 389, 388, and 367 correspond to actions on sets 318, 339, 338, and 317; Cams 120, 122 (described in FIGS. 15 and 6), 380, 382, 383 are cams 329, 331, 30, 332, 333 Is equivalent to; Cams 120 or 382 are shown in FIGS. 5 and 6 as 120 (349) and 350 are feed hooks for the warp and are similar to hooks 342 and 343 and line ( 344 and 345 allow the warp yarns already received by the hooks 342 and 343 to be gripped. The warp is passed from one side of the appropriate hook to the other in the manner described below, forming a stitch with one bar and starting with a stitch with the other bar.

The different orientations of the portions in the R zones are a matter of course, and the figure of FIG. 11 for the plate is all similar, including the tenth and functional aspects of the cylinder.

The device is installed as a double cam system (329-331; 332-333; 120-122; 382-383) to move the needle on two feeders, each of which has a means for real use. These dual systems can be converted into a single system, each represented by a single feeder, feeding two yarns of warp yarns of different variables to produce a so-called "slip strip" patterned knit fabric.

Therefore, the device can advance two different types of warp on the components of two feeders to form two consecutive spiral rows of fabric inserted into each other with two bars of needles, twisted to the left ( S) Yarn (nylon) and twisted to the right (Z) You can make a product formed by alternating different yarns. This ability is useful for forming elastic garments interwoven between twisted nylon yarns and other elastic yarns such as Lycra.

The above-mentioned apparatus is also suitable for producing other products with pattern stitches having slip stitch patterns. The fabric is likewise produced using two yarns, in which case the shape is the same (nylon) but the warp number is different. This pattern can be obtained by feeding the two threads to the needle in the same feeder and selectively raising it by the cam 332 for the remaining needle and the cam 332 for the remaining needle and lowering it to the cam 333, acting on the needle. The cam structure is slightly modified. For each set on a feeder of the type described above to feed and feed the seal, there is initially one for each of the two feeders 342-343 and 349-350, so a single feed Both of these need to be used to feed the device, ie both threads are held by the needle by selectively raising and lowering the needle.

The problem is solved by removing one of the two lowering cams, ie stitch forming cams 331, 333, 122, 383, and converting each set into a single feeder. Although the initial configuration of the two cams was described with respect to the cylinder of FIG. 10, the cams 331 and 122 are removed from the plate of FIG.

Conventionally, in order to form a slip stitch pattern, a relatively high number of warp yarns are raised by holding a plurality of needles according to a predetermined selection (representing a pattern), and then delayed the tips together. Will be described with reference to the twelfth diagram showing the cam of the cylinder to achieve this. By raising a plurality of needles according to a preselected selection of cams 329, the needles hold the orbit 340 and the thread 344 while the remaining needles are raised by the cam 332 soft to the orbit 341. . The above-mentioned selection of executing a predetermined pattern is created by lever group 317 or a combination of lever 317 and 318 groups, which raises the selector over cam 144 and consequently the needle over cam 329. To increase. The rest of the selector is raised above the cam 337 by a single lever set 339, in which case the single selector is sufficient since the remaining selector must be raised without any selection. Corresponding needles rise above cam 332 and their tips hold thread 345 along orbit 341. The first supplied thread 344 is caught by the first raised needle and not caught by the coarse thread passing behind them by continuously raised needles according to known methods.

The patterning by the needle bar of the plate is generally similar to the above description for the cylinder and the cam is shown in FIG. 13, where the cam 122 is not present.

As described above, the mechanical device produces a plurality of products simultaneously and in this embodiment produces four simultaneously. When the thread is broken, with respect to the product to be formed, continuous operation is excluded in the fabric forming zone, and is achieved by the optional freedom imparted by the above-described machinery. In particular, the outward motion of the heel 118 and 138 is excluded and no damage occurs to the tongue of the inactive needle.

Note that while the configuration described above may use a needle that does not have a heel directly, the heel 118 and 138 may be degenerate to avoid action on the needle. This prevents any stress on the stitches engaged by the inactive needles, keeping them fixed without causing excess downward motion on the needle control cams, especially those that lower the needles. This configuration prevents the need for converting the needle control cam as well as preventing the stress on the stitches and excluding the risk of breakage of the thread.

A mobile receiving means is provided for supplying the seal, which is connected to the reverse rotation devices 26 and 32 with the cam of the cylinder and the cam of the plate. The seal is received in one direction by one of the means, released after being activated (if one of the means is inactive) and received in the opposite direction by the other receiving means, which is in turn activated and in the opposite direction. To reach. In this way-for the formation of each cylindrical product-the alternating movement of the thread in one direction against one bar and the opposite to the other bar is achieved without the alternating member.

In the mechanism forming the present invention, the means for accommodating the seal, i.e., the hooks of Figs. The design of the member is provided with a pair of feeding devices in a special form (see also 18 to 20) to supply different warp yarns to each other, so that the receiving means works jointly with other members to classify the yarns to each bar At first, the same yarn is supplied, and then, the other yarn is supplied to reverse the direction of weaving on two bars.

A part of the real means is a head formed in the shape of a hook after being directly contacted with the seal and marked with 342 and 343 for the two supply apparatuses and the cylinders in FIGS. 10 and 12, respectively. And 13, 349 and 350 represent hooks for feeding two warps to the needle of the plate.

Other parts of the device not mentioned in the present invention are described in Italian patent application N.9357A / 89.

Alternatively to those shown in FIGS. 5-7, the selection of the needle obtained by vibration of the small jack 116 or 136 mounted to the needle instead of the vibrating jacks 126 and 132 is described below. Can be implemented by other means in the form. FIG. 18 schematically illustrates an embodiment of the selection system wherein each jack 116, 136 is vibrated by a trigger, moved by an electromagnet, and replaced by an electroprogrammer, ie, needle, synchronized with the rotation of the device. It is activated by two counterrotating devices which carry a cam set.

When selecting the needle of the plate 10, the means for vibrating each jack 116 is a trigger 577, which consists of an arm 577A and has a rounded portion 578 as the support point of the lever. Arm 577A is pulled by small magnet 580 as an action of the operating cycle program, pivoting the entire triggers 577A- 577 to the support point 578. In this way the arm 577 is lowered to squeeze the tail of the jack 116 so that the heel 118 appears to actuate the needle 13 as a cam. The mentioned trigger 577 is mounted on the front end face on the periphery of the wheel 582 fixed to the plate 10 and is held by an elastic belt or spring 579.

Since the mechanism is designed with high precision, the distance between the needles is small and the space used for the electromagnet 580 is small, so they cannot be accommodated between one needle and the other needle in terms of thickness. Therefore, it is convenient to stagger two or more rows as shown in FIG. The trigger 577 is in two or more forms, with arms 577A in different orientations, and in the embodiment of FIG. 18, the trigger 577 has arms 577B for the electromagnets 581, so that each magnet ( It is inserted between two triggers 577 with arm 577A to 580.

As a similar solution for selecting the needle 15 of the cylinder 11, the jack 136 can be lowered and the trigger 583 with the arm 583A and the other trigger with the arm 583B, respectively, are used. It is jointly coupled with electromagnets 585 and 586 arranged in two different ranks.

The selection system limits the cam acting on the needle without the use of the selectors of FIGS. 8 and 9 as the two reverse rotating devices 26, 32 have a much smaller volume as compared to the first one described. In addition, the dimensions of the cylinder 582 on the cylinder 11 and the plate 10 are reduced in comparison with the cylinder 11 and the cylinder 9 on the plate of the above-described embodiment, and the parts related to needle selection are triggered 577. It is completely stopped except for the small vibration of (383).

Claims (8)

In a mechanism for selecting and controlling a needle in a knitting machine having at least one needle bar formed of beds arranged side by side in a sliding channel and having parallel edges for guiding a stack of needles that can slide in each channel. The needles 13 and 15 have a heel that does not interact with the stitch forming cam, and the stack selector or jacks 116 and 136 coplanar with each needle are accommodated in the same channel for angle conversion with respect to the needle. And the jack or selector have at least one heel 118, 138 that can protrude and degenerate with respect to the bed to be active and inactive with respect to the stitch forming cam, respectively, in coplanar with the needle. A mechanism for selecting and controlling the needles of a knitting machine. 2. Knitting machine according to claim 1, wherein the jacks or selectors (116, 136) are joined to the needles by engagement generated by complementary members with arched recesses (117) and protrusions (114). Mechanism to select and control the needle. 3. The jack or selector of claim 1 or 2, wherein the jacks or selectors 116, 136 extend to form a rocker arm by joining at an intermediate position, with heels 118, 138 at one end while the opposite end protrudes from the channel Mechanism for selecting and controlling the needle of the knitting machine, characterized in that for receiving the pushing control to insert the end into the channel to project the heel. 4. A device according to claim 3, characterized in that the device controls one arm with individual electromagnets, including vibration triggers, and mounts a plurality of electromagnets to the selector of the same bar to act on the respective vibration selectors 116 and 136. Mechanism to select and control the needle of knitting machine. 4. The needle according to claim 3, wherein the device is provided with a slide selector 132 having an inclined side surface 132A which can act on the opposite end in the same channel to lower the needle of the knitting machine. Machinery made. As a transformation for the heel interacting with the stitch forming cam, it consists of a stacking selector or jack 116; 136 coplanar with the needle, which can be accommodated in the same channel as the needle, and in the needle for the purpose of angle conversion with respect to the needle. Bonded and in the same plane as the needle, the jack or selector has at least one heel 118, 138 that can protrude and degenerate with an angle change of the jack or selector to be active and inactive with respect to the stitch forming cam, respectively. Needle for knitting machine. 7. The jack or selector of claim 6, wherein the jacks or selectors 116, 136 are joined to the needle by engagement created by complementary shaped retainers with arcuate recesses 117 and protrusions 114. 116,136 extends to form a rocker arm by joining at an intermediate position, with the heel 118,138 at one end while the opposite end protrudes from the channel to accommodate pushing control to insert the opposite end into the channel. Needle for knitting machine, characterized in that protruding. 5. A knitting machine in which at least one needle bar is formed in a bed positioned side by side in a sliding channel and supports parallel edges to guide the locust of the needle which can slide in each channel. Knitting machine comprising a mechanism for selecting and controlling any one of the needles.

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