JPS6347814B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The system for guiding the yarn of a flat knitting machine according to the invention carries out the yarn feeding by passing through a guide element 19, which has a side section to facilitate rapid and accurate insertion of the yarn. It has a curved guide beak which is easily accessible from below the front and has an opening in the guide mounting bar 14, 15 and a clip component 20 for easy attachment and subsequent adjustment to the guide mounting bars 14, 15. This beak-shaped guide can be looped to form a yarn guide portion 24 of the hairpin-shaped thread.

The present invention relates to a yarn feeding device for a flat knitting machine of the type having bobbins arranged in a plurality of rows or stepped rows and having a plurality of yarn guide attachment bars.

In such devices, the yarn is conventionally guided through a yarn guide element, which has an insulated tube of metal or frictionless ceramic material over its entire length, through which the yarn must pass. be. this is,
It applies both to yarn guide elements which only change the direction of movement of the yarn, and also to yarn guide elements with a yarn monitoring device. Yarn guiding devices of this type do actively prevent the yarn from flying out, but the yarn guiding elements are not within the reach of the craftsman and threading is a tedious task.

This situation is becoming more and more common in modern knitting machines, for example in modern flat knitting machines with high and extensive bobbin stands and multiple yarn guide mounting bars, where the craftsman threads the thread. A creel or threading pin must be used for this purpose. This not only leads to an increase in equipment costs on the machine, but also means an increased risk of accidents for the operator.

It is also known that yarn guide elements have lateral openings through which the yarn can be threaded from the side, these lateral openings being somewhat convoluted in practice in order to prevent the yarn from jumping out of the guide element. Yarn guide elements of the known type with lateral yarn guide openings, however, are not suitable for all ranges of use and for all conditions. Often, the lateral yarn guide openings are so narrow that very unwieldy threading rods or threading pins are required for unstraight insertion of the knitting yarn. Furthermore, the attachment arms of the yarn guide elements often impede lateral yarn insertion.

An object of the present invention is to devise a yarn feeding device for a flat knitting machine that prevents the yarn from jumping out and has a simple structure that allows the yarn to be inserted easily and quickly from the floor surface.

This object is achieved according to the invention in a yarn feeder of the type described above, with at least one yarn guide element arranged on the yarn guide mounting bar and having at least one upper or lateral yarn entry opening. , a yarn monitoring device with a yarn guide element open on only one side. The yarn guide element has a clip portion having resilient bite jaws that engages around the yarn guide mounting bar and has at least one open yarn guide portion that slopes downwardly from the clip portion. It has an arm with a

The arm connected to the clip part constitutes a first leg which is a hairpin-shaped yarn guide part, the other free leg has a bent end extending from the hairpin surface, and the two legs are Forms a thread insertion opening.

This has a thread insertion port from the side,
Provides a yarn guide element that can be conveniently and quickly mounted on a yarn guide mounting bar that extends high above the knitting machine, which on the one hand facilitates thread insertion by means of threading pins or creels; However, on the other hand it means that there is a guarantee that the thread will not accidentally jump out of the guide element. This arrangement ensures that the yarn guide area is always located below the yarn guide mounting bar, which also serves as a support for the yarn guide element, at the front of the machine, so to speak, and is thus oriented towards the operator. It also has properties.
Since the thread access opening can also be moved from the support of the yarn guide element towards the operator, the insertion of the thread from below the front can be carried out more easily with the threading pin without the interference of the support of the yarn guide element. .

Thread insertion is also aided by the fact that the free leg of the guide part is bent away from the hairpin plane.
Furthermore, preferably, the free legs of the yarn guide portion are formed by bending the hairpin portion in a plane parallel to and at a constant distance from the plane in which the yarn guide attachment bar of the clip portion is accommodated. The free end of the section is bent over itself from the base so as to terminate above said first leg. As a result, this is despite the fact that the yarn spacing can be relatively wide both in relation to the clip part and the yarn guide mounting bar and also in relation to the legs of the yarn guide element constituting the connecting arm. prevents the thread from jumping out from the guide band.

The yarn guide element is integrally formed of a plastic material having suitable strength and elasticity.
The part in which the thread actually contacts and changes direction is a wear-resistant material in the form of a loop, for example made of metal wire, between the two legs of the hairpin part of the guide element. The clip portion can be easily clamped onto the yarn guide mounting bar and held there by its inherent resiliency while also providing sufficient gripping force to move the clip portion effortlessly to any desired position on the mounting bar. It is formed to have.

With the yarn feeding device according to the invention, the yarn guide path is likewise set in conjunction with a yarn monitoring device that is only laterally open, so that the yarn guide elements are outside the reach of the operator. There is no need for the operator to use a guide tool, and the thread can be quickly inserted over the entire path.

FIG. 1 shows a portion of a yarn feeding device disposed above a so-called bobbin stand (not shown) on which bobbins of a flat knitting machine are arranged. The yarn is first guided upwards from the bobbin on the table, then forward through a yarn monitoring device 10 associated with a yarn brake and then downwards into the knitting section of the machine. An upright support column in this part of the machine has a forward arm 12 fixed at its end supporting an angle bar 35 to which a thread monitoring device 10 is attached. In reality, a bar such as 35 is equipped with a plurality of such devices. Two support arms 14 and 15 are shown in FIG. 1, and the support arm 12 has yarn guide mounting bars that are parallel to each other at a constant interval and extend perpendicular to the longitudinal direction of the flat knitting machine (not shown). and is connected to the support column 11 via support rods 13 that are spaced at a constant interval. Yarn guide mounting bar 1 like this when viewed from the operator side of the machine
4 and 15 are arranged at intervals so that one follows the other. The entire illustrated yarn feeding device is arranged in a plane above the machine and out of reach of the operator.

In FIG. 1, three threads 16, 17, 18 are shown which are drawn from a bobbin (not shown) in the direction of the arrows as described above and passed through a thread monitoring device 10 to the knitting machine. The structure of the device 10 will not be discussed here. The yarn 17 is guided through a yarn guide element located on the yarn guide mounting bar 15 and indicated generally by reference numeral 19, while the yarn 18 is guided through a yarn guide element 19 located on the yarn guide mounting bar 14. The yarn 16 is guided through a yarn guide element arranged on a third yarn guide mounting bar (not shown).

The structure of the yarn guide element 19 is shown in FIGS. 2-4. It is integrally formed from a plastic material of sufficient elasticity and has a clip portion 20 for attachment to an associated yarn guide mounting bar. Each clip portion 20 has a C-shaped cross section with a recessed interior 21 corresponding to the cross section of the yarn guide mounting bars 14, 15, and has a chamfered end portion 2 on the opening side.
It has 2. The clip portion 20 can clamp the yarn guide mounting bar by opening its chamfered end 22 upward, and is held to the mounting bar by its integral elasticity, eliminating the need for any additional mounting means. I don't. In this way, the yarn guide element can be mounted at any location on the mounting bar.

A hanging arm 23 having a chevron-shaped cross section extends forward and downward from the clip portion 20 in a tilted state. This arm 23 constitutes one leg of the hairpin-shaped section 24 of the guide element 19. The other flat leg 25 is cranked from the inclined surface of the hairpin section 24 at 26 to a vertical surface parallel to the yarn guide attachment bars 14, 15, as shown most clearly in FIG. It is bent. In this vertical plane, as shown in FIGS. 3 and 4,
The leg 25 has a second tip 27 so that the second
A part of the free leg 25 of the part 24 is arranged in an inclined manner across the hairpin gap 28, so that the free end 29 of the leg 25 is arranged above the other leg 23 of the part 24.

The actual yarn contactor of element 19 is a loop 30 formed of steel wire, which is placed in a hairpin gap 28 and whose ends are connected to leg 23.
and openings 32 and 33 in free leg 25, respectively.
is engaged in a snap-on manner. The yarn is guided through an access opening, depicted as 34 in FIG. 2, to a yarn guide section constituted by a loop 30 of steel wire. This opening 34 is connected to the yarn guide mounting bar 1.
4 and 15, and is relatively wide, making it easy to insert the thread using the threading pin. During insertion, the knitting yarn must be carried around the free end 29 of the free leg 25 so that there is sufficient space between the cranked end of the free leg 25 and the other leg 23. may fall into a gap with

In addition, this yarn guide element allows the yarn to be inserted from above more easily than a spirally wound metal wire.

According to the figures, the yarn guide element does not have any sharp edges with respect to its yarn guide portion, nor does it have narrow gaps in which the yarn can get caught. The two legs 23, 25 are hairpin shaped portions 2
4, so that the knitting yarn running around the hairpin section slides downward.
The free leg 25 is bent at such an angle that the thread placed therein necessarily slides downwards. The knitting yarn sprung out from the yarn guide portion 30 faces the inclined inner edge of the bent free leg 25 end;
It is therefore actively guided into the original hairpin gap 28. Even if the thread slips upwards and reaches the free end 29 of the bent leg 25, it first engages the other leg 23 and is prevented from moving further in the direction of the feed opening 23. So this is nothing to be concerned about.

[Brief explanation of drawings]

Embodiments of the yarn feeding device according to the invention are described below with reference to the accompanying drawings. Fig. 1 is a side view of a yarn feeding device of a flat knitting machine having a special yarn guide element according to the present invention, Fig. 2 is a side view of this yarn guide element, and Fig. 3 is taken from the direction of the arrow in Fig. 2. 4 is a front view of the yarn guide element seen in the direction of the arrow in FIG. 2. FIG.

Claims (1)

[Scope of Claims] 1. It has bobbins arranged in a plurality of rows or stepped rows and a plurality of yarn guide attachment bars, and the yarn is arranged on the yarn guide attachment bars 14, 15 and at least one upper Alternatively, the yarn feed of the flat knitting machine is fed to the yarn knitting section of the machine through at least one yarn guide element 19 with a yarn entry opening 34 laterally and through a yarn monitoring device 10 with yarn guide elements open only on the sides. In the device, the yarn guide element 19 has a clip part 20 made of plastic and having resilient biting jaws that engage around the yarn guide attachment bars 14, 15; It has an arm 23 which is inclined downwardly from the top and has at least one open yarn guide part 30, which arm 23 constitutes the first leg of the hairpin-shaped yarn guide part 24, while the free leg 25 is connected to said hairpin. It has tip portions 26, 27 extending obliquely upward from the plane in which the yarn guide portion 24 of the shape belongs, and at least the free end side 27 of the tip portions 26, 27 further extends obliquely in the direction of said legs 23. A yarn feeding device for a flat knitting machine, characterized in that a yarn insertion port 34 is formed between the two legs 23 and 25. 2. The free leg 25 of the yarn guide portion 24 is
The hairpin part is bent in a plane parallel to and at a constant distance from the surface of the clip part 20 that accommodates the yarn guide attachment bar, and the free end 29 of this bent part is connected to the first leg. Yarn feeding device according to claim 1, characterized in that the yarn feeding device is itself bent from the base (25) so as to end above the yarn (23). 3. The yarn guide element is integrally formed of plastic material and has a hairpin-shaped portion 24.
3. The yarn feeding device according to claim 1, further comprising a yarn contactor 30 made of a material with low friction between the two limbs of the yarn feeding device. 4. characterized in that said yarn contactor is a loop 30 made of steel wire, the ends 31 of which are engaged in a snap-like manner in the openings 32, 33 of the legs 23, 25 of the hairpin-shaped part 24; A yarn feeding device according to claim 3. 5. Claims 1, 2 and 3, characterized in that the outer edges of the legs 23, 25 of the yarn guide portion 24 taper inwardly toward the bend of the hairpin. Or the yarn feeding device according to item 4. 6. The yarn guide element 19 is formed of a resilient plastic material, and the clip portion 20 of this element is C-shaped in cross-section and fits snugly around the yarn guide attachment bars 14, 15, so that the clip portion is secured to the rail. Yarn feeder according to claim 1, characterized in that it has a mouth with a beveled end (22) which allows it to be clamped and held by the inherent elasticity of the plastic material.