RU1784686C - Slide needle for knitting machines - Google Patents

Abstract

Usage: in the knitting industry, on round-knitting machines. SUMMARY OF THE INVENTION: A slide needle comprises a rod with a hook, an abdomen with a longitudinal groove 0.5 to 2.0 mm longer than the working stroke of the engine, a heel and a transverse groove in the area between the abdomen and the heel. The engine is made with a thickness in the zone of the cape, less than the thickness of the hook, and in the zone of the protrusion is equal to the thickness of the needle shaft. The hook tip is made in the form of a slice along the plane with the mentioned inclination 0-45 °. to the plane of the rod, 24 ill.

Description

The invention relates to knitting engineering, in particular to the design of slide needles (also called slotted or integral), for example, for circular knitting machines.

A slide needle for circular joining machines is known, consisting of a rod provided with a hook with a point at one end and a heel at the other, and a slide (also called a closure or gate) movably mounted in a groove formed in the needle shaft. One end of the slide is provided with an element for closing the tip of the needle hook in the form of a groove, and the other with a heel for engaging with the wedges. A needle with a slide in the groove of the rod is inserted into the groove of the needle bar, and the protruding heel of the needle and slide enter the channels formed by the wedges. During operation, the needle and slide heels move along the wedge channels, sharing the needle and slide

movements necessary to complete the looping process.

The disadvantage of the described design of the slide needle is that it requires a special wedge channel for 5 tbk engines, which complicates the mechanism of knitting the machine, increases the cost of its manufacture, complicates repair and operation, and also reduces the reliability due to additional loads and, therefore, additional phenomena of wear.

A slide needle with a slideless engine is also known. The core of this needle is made in the form of a groove of sheet material by bending, the heel is made of two layers of metal, and the hook is also made in the form of a curved groove with rounding on the outside and thin walls along the inner contour of the hook. The abdomen of the needle (i.e., the smooth extension of the contour of the rod under the hook) also has two thin walls forming a groove in

Xj 00

Q o 00

about

which are made longitudinal grooves. An engine is inserted into the groove of the rod, also in the form of a groove, the walls of which protrude from the abdomen of the needle shaft. At the level of the longitudinal grooves of the abdomen in the engine there is a hole in which a pin is mounted with an exit to the longitudinal grooves. This pin allowed the engine to move within the longitudinal grooves of the abdomen to open or close the needle hook during the knitting process. The walls of the engine protruding from the groove of the slider are inclined relative to the walls of the bar and are elements for transmitting movement to the slider. In the process of looping, when the needle is pulled out of the needle gap, the old loop comes out from under the hook, presses on the protruding inclined walls of the slide, and moves the slide along the rod until the pin rests in the rear edges of the longitudinal grooves, thereby opening the hook for inserting a new thread. after which it goes beyond the rear contours of the inclined walls of the engine. After laying a new thread under the hook, the needle is again pulled into the needle groove, while the old loop captures the engine by the rear contours of its protruding inclined walls and pushes it toward the hook until the pin stops in the front walls of the longitudinal grooves. The hook closes, entering the groove between the walls of the engine.

With such a needle design, there is no need for a heel-wedge channel system, since the slider is moved directly by the thread itself. However, as a result of an increase in the load on the thread, there is a danger of partial or complete cutting of the loops by the thin walls of the rod and the engine (for example, on a class 20 machine, a needle thickness of 0.45 mm includes two rod walls, two walls of the engine and the width of the groove of the engine, i.e., the thickness one steak is not more than 0.45: 5 0.09 mm). The execution of the rod and the engine in the form of two grooves, one of which is inserted into the other, reduces the reliability, since it involves a significant reduction in the thickness of the needle elements, which can lead to breakdown (for example r, breaking the hook of the needle) or cutting the loops. On the other hand, this design cannot be used on machines with a high class, where the thickness of the needle shaft is so small that it cannot be divided into its constituent elements (shaft walls, walls and groove of the engine). In addition, the reliability is also reduced due to for violations resulting from fluff and dust getting into the gaps between the groove of the needle shaft and the slide, and also between the pin of the slide and the guide groove in the walls of the needle shaft.

The purpose of the invention is to increase the reliability of the slide needle and expand its scope by providing the ability to work on high-end machines.

This goal is achieved by doing so. that the needle shaft in the area above the heel is provided with a rectangular groove, into which a rectangular protrusion at the end of the slide, equipped with elastic elements for

5 to fix the slide in the needle groove, the parts of the stem and the slide below the abdomen on the needle stem have the same thickness equal to the width of the needle groove.

In FIG. 1 shows a section in the vertical plane along the axis of the machine; in FIG. 2 - needle (without engine); in FIG. 3 - engine (without a needle); in FIG. 4 is a view along arrow A in FIG. 3; in FIG. 5 - node I in FIG. 2; in FIG. 6 is a view along arrow B in FIG. 2; in FIG. 7 - node II on

5 of FIG. 1; in FIG. 8 is a view along arrow B in FIG. 1; in FIG. 9 is a section GG in FIG. 1 by needle; in FIG. 10 is a section GG in FIG. 1 on the needle in the groove of the needle cylinder; in FIG. 11 is a section DD in FIG. 1; in FIG. 12 - section EE

0 on fit. 1; in FIG. 13-17 are examples of the execution of the point of the hook and the working end of the engine; in FIG. 18 is a sectional view of II in FIG. 17; in FIG. 19 is a view along arrow K in FIG. 17, but with a cylindrical surface

5 hooks; in FIG. 20 is a view of a portion of a needle cylinder with wedges and accurate needle channels; in FIG. 21 and 22 — short and long needles in the position without rising above the borehole plane of the cylinder (plane 0-0 in FIG. 24); in FIG. 23 - short needle in the lifting position; Fig. 24 shows the trajectory of the needle of the cylinder with the engine and the steps of loop formation. In the grooves of the needle cylinder 1 (Fig. 1)

5 installed needles 2 with engines 3, closed

outside with blocks 4 with wedges 5 and cover

- 6. The needle (Fig. 2) consists of a hook 7 with a tip

8, abdomen 9 with groove 10, narrow 11

rod, extended part 2 rod with

0 by a groove 13 above the heel 14, the shank 15 and the cutouts 16 to reduce the weight of the needle and improve the dynamics of operation. The engine (Fig. 3) has a narrow working end 17 on the interacting with the loop part 18 of the rod,

S expanding portion 19 of the shaft, notch 20 and a tail extension 21 forming with a rectangular protrusion, with slits 22 for elastic members 23 {Fig. 4), which are slightly bent away from the thin part 24 of the rod and the ledge 25. The working part

17, 18, the rod of the slider is made thinner and has a thickness equal to the width of the groove 10 in the abdomen of the needle. The working end 17 of the engine is a needle hook closing element, the tip of which has a corresponding working section (Fig. 5, 6). With the engine fully extended, its working end 17 overlaps the working section of the needle hook point (Fig. 7.8), thereby closing the hook with the thread underneath. The working section of the needle hook point can have a conical sharpening (Figs. 15, 16), and it is necessary that the cone forming 35 (Fig. 15) on the outer contour of the hook is parallel to the plane 36 of the working end of the slider. In FIG. 17, the hook tip is formed by two inclined planes 37.38 (Fig. 18), the intersection rib 39 of which is turned at an angle to the needle back. Parallel to this rib is a plane 40 of the working end of the engine. It is also possible to make the point of the hook in the form of a cylindrical surface with a radius R equal to the thickness of the hook d or

j (Fig. 19). Optimal, however, should

count the execution of the hook tip in the form of a plane 32 (Fig. 13, 14), located at an angle to the plane of the back of the needle shaft, which corresponds to a parallel inclined plane 33 at the end of the working part of the engine rod. There is a small gap 34 between the planes 32, 33. As can be seen from FIG. 8, 14, 16 and 19, the thickness of the working end of the slide is less than the thickness of the needle hook. The engine can have this thickness either only at its working end, which enters the groove 10 of the needle, or throughout its entire length.

The claimed slide needle is integral, i.e., complete with the slide exists, complete with needle cylinder 1 and wedges 5 (Fig. 1). In the assembled state, the end 18 of the slider enters the groove 10 of the needle’s abdomen (Figs. 1, 9), and the needle itself, together with the slider, enters the needle groove of the cylinder (Figs. 1, 10), while in Figs. 11 shows the connection of the needle with the upper wide part of the slide, and FIG. 12 is a cross-sectional view of the engine shaft and the needle shaft at the notch. Ls FIG. 1 and 12 it is seen that the slide is held on one side by a cap 6 and wedges 5, and on the other, by the bottom of the groove 13 in the middle of the needle and the bottom of the groove 10 in the abdomen of the needle. The heel needle 14 (Fig. 2) enters the heel channel formed by the wedges. In FIG. Figure 20 shows a block of cylinder wedges for one casing system of an integoblock machine with an upper heel channel 26 for short slide needles (Fig. 21) and a lower heel channel 27 for long slide needles (Fig. 22). Channels 26, 27 are formed by lifting wedges 28, culinary wedges 29, under-wedge wedges 30 and guide wedges 31.

The needle works as follows. When the heel 14 (Fig. 2) moves along the channel (e.g. 26 or 27 in Fig. 20), the needle rises and lowers. At the same time, its top moves along the path 41 (Fig. 24), the hook tip follows the path 42, and the working end of the engine moves along the path 45. As can be seen from FIG. 24, in the lowermost position of the needle, the tip of its hook is closed by the engine, while the upper wall of the rectangular protrusion 21 of the engine (Fig. 3) abuts against the upper edge of the rectangular groove 13 (Fig. 2) in the needle shaft, and the lower wall of the protrusion 21 of the engine is removed from the lower edge of the groove 13 in the needle shaft by a distance equal to the travel of the engine (Fig. 1). The elastic elements 23 of the engine (Fig. 3) abut against the walls of the groove of the cylinder and fix the engine in it thanks to the friction forces. Therefore, at the beginning of the lifting of the needle, the engine does not rise until the lower edge of the groove 13 in the needle shaft abuts against the lower wall of the protrusion 21 of the engine, after which it moves together with the needle. As a result, the needle occupies an extreme aseptic position with the hook fully open and the slider recessed into the groove of the rod core (middle position in Fig. 24 and Fig. 23). This allows the old loop to slide out from under the hook onto the abdomen of the stem and attach the new thread 44 from the tubular yarn guide 43 under the needle hook. When the needle is subsequently lowered, the engine stands for some time due to its fixing in the groove of the cylinder with the help of elastic elements 23, after which it is lowered together with the needle to its lowest position. Thus, while lowering the needle, the thread 44 is caught by the hook of the needle, then the hook is closed by an engine sliding out from the abdominal groove, along which the old loop is reset. After the joint lowering of the needle with the slider ends, the next needle lift begins and the cycle repeats. As can be seen from FIG. 24, the trajectory of lowering and raising the slider is close to the neutral position of the needle, in which the inner contour of the top of the hook is close to the bending plane 0-0 (Fig. 24). During the movement of the needle, the connection of the working end of the slide with the groove in the abdomen of the needle is not lost, but changes from the position in which the working end of the slide is recessed into the groove (Fig. 23) for the looping operation, closing to the closing position

the needle hook point with the working end of the slide (Fig. 21) for subsequent looping operations (application, bonding, dropping, etc.). It is therefore advisable that the length of the groove for the slide in the abdomen of the needle shaft be 0.5-2.0 mm longer than the stroke of the slide. The proposed design of the slide needle allows to increase the reliability of operation compared to the prototype needle, firstly, due to the fact that the needle and slide can be made in a sufficient thickness, limited only by the width of the needle bar groove (this circumstance also allows the use of removable needle on machines with a high class, i.e., with a small width of the grooves of the needle bar), while the wall thickness of the needle and the slide of the prototype needle should be at least five times smaller than the width of the needle groove, and secondly, due to the fact that the needle with vizhkom enclosed in a needle groove and is locked therein and the lid wedge blocks, however almost entirely eliminated disorders arising due to ingress of dust and fluff in the gaps between the rod and the needle engine. In addition, the proposed needle, in comparison with the known slide needles, has simpler forms of working elements, for example, the hook tip and the hook closing element on the slide, which greatly simplifies and reduces the cost of its manufacture. Significant advantage

in comparison with the prototype, where the engine is controlled by a loop, it is also the fact that in the enclosed needle the engine is controlled not by the loop, but by the needle itself. Due to this, the load on the thread in the loop formation zone is significantly reduced, which ultimately leads to an increase in the quality of the web, ensuring the same size of the loops (even structure).

Claims (1)

SUMMARY OF THE INVENTION Sliding needle for knitting machines, comprising a rod with a hook, an abdomen with a longitudinal groove for the engine, a heel in the tail of the rod and a transverse groove in the area between the abdomen and the heel, an engine with a protrusion provided with elastic elements and a height equal to the depth of the transverse groove, and a cape in contact with the hook of the needle, characterized in that, in order to increase reliability in operation, the length of the groove of the abdomen of the needle is 0.5-2.0 mm longer than the stroke of the slide, the latter is made with a thickness on the site of the cape, a smaller thickness of the hook of the needle, and on the protrusion portion equal to the thickness of the rod, while the tip of the hook is made in the form of a slice along a plane with an angle of 0-45 ° to the plane of the rod and parallel to the contact plane of the toe of the slide, and the elastic elements of the protrusion of the slide are made with cuts from two its ends and their one-sided limb. % g1 . Tig2 Tig4 Fig.Z T MrS TiS B / h ITJHi v-v g-JM g JM j -JHJj s / S / / Xxxxn 7 // Y / // J-j 3W j-j yig 13 FIG. FIG. 15 FIG. 1B Bbc J9 38 Fig | 7-FigSh FIG. go J9 38 7 I Fig21 FIG. 22 FIG. 24