JPS5860047A - Knitting yarn sending apparatus for multifilament knitting machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] The present invention relates to a multi-fall knitting machine, particularly a circular knitting machine).
This invention relates to a knitting yarn feeding device d for a knitting machine.

As is well known, multi-fall knitting machines, i.e.
In these machines, the fabric is made through a needle which draws a plurality of feed knitting yarns from a plurality of spindle-shaped yarns or the like, such yarns being drawn from the spindle-shaped yarns;
It is sent to the needle through a feeding device. This feeding device has a roller or wheel which is freely rotatable about its axis and which has an actually cylindrical surface, and the knitting yarn is moved around this roller or wheel which is actuated by a drive element. It is held in place by being pressed against the lower part of the wheel by a belt so that it hangs.

As the belt advances, the rollers or wheels are rotated and the knitting yarn is pulled out from the spindle winding under its influence, and the knitting yarn is thus released from the belt and the rollers or wheels and given a fixed speed to each needle. Supplied with

In the case of a Su-Cura knitting machine, the persimmon rollers or wheels are arranged in a circle at the top of the machine, and there is only one belt that drives the rollers to rotate, and it is closed in a loop.

In order to separate one or more yarns from the belt, it is frequently necessary to move the yarn concerned in the axial direction of a roller or wheel offset from the belt. The knitting yarn slides on the surface of a roller or wheel that is continuously driven in rotation by the belt, the belt no longer touching the knitting yarn. This means, for example, when you need to change the length of one stitch on a knitting machine, when you need to change the type of knitted fabric being knitted on a machine, and when you knit a fabric with stripes of a different color. This occurs when you want to omit one or more yarns of a given color from the fabric you are knitting.

Since the knitting machine is operated at high speed, if it becomes necessary to interrupt the supply of a given yarn, the yarn concerned is removed at high speed from the position where it is clamped between the belt and the rollers or wheels concerned. measures must be taken.

Each yarn feeding device is provided with a movable outlet arm over which the yarn exiting the device passes. This arm is also responsive to the tension in the exit yarn. When the tension in the exit yarn is relieved, the pressure on this arm is reduced and acts mechanically or otherwise on the yarn insertion arm or guide slit, lifting it and removing the pressure band of the belt over the roll or wheel. Release the knitting yarn from the The movable exit arm is slightly longer than the thread insertion arm, and the thread passing over the associated roller or wheel passes through two threads integral with each of the two arms. As the yarn is pulled, both arms move towards the belt and hold the yarn under the belt in a substantially longitudinal position of the belt. When the supply of the associated knitting yarn has to be interrupted, the knitting yarn is pulled away from the belt and the associated rollers or wheels by the movement of the two arms.

This rod feeding device is well known, and includes, for example, the German-held W1 No. 1. ．． 585.298 and DE 1.635,893, the movable outlet arm acts on the movable inlet arm to move the knitting yarn parallel to the belt. It has the disadvantage of requiring a long time. This time is sufficient for the knitting yarn, which is pushed parallel to the belt between the belt and the roller or wheel, to be pulled out from under the belt as the entry arm moves laterally relative to the belt. It depends on the time required. In other words, in order to pull the knitting yarn away from the contact zone between the belt and the roller or wheel, the roller or wheel must rotate through an angle equal to the maximum angle by which contact between the belt and the roller or wheel occurs. No.

Furthermore, during the feeding of the knitting yarn, the exit arm is determined by the exit side thread that is integral with this arm and the point at which the knitting yarn leaves the zone where it is being pushed between the belt and the rollers or wheels. take a position. As a result, when the exit arm is moved or driven to control the stopping of the yarn feed, the exit arm is pulled toward the belt by the yarn that is substantially in the middle of the belt.

This means that the movement of the outlet arm is significantly inhibited.

Together with the above facts, this factor means that it takes a considerable amount of time after the action to stop the supply of knitting yarn is taken until such supply has effectively ceased, and the insertion and/or interruption of the knitting yarn The device becomes unusable when the process has to be carried out quickly.

A first object of the present invention is to provide an improved yarn feeding device which greatly reduces the interruption time of yarn feeding.

Another object of the invention is to provide a device of the above type that is very simple in construction and inexpensive to manufacture.

These and other objectives are achieved by a knitting yarn feeding device for a present knitting machine. This device consists of a roller or wheel mounted so as to be freely rotatable on a solid support, and can be securely fixed to a machine, with a belt seated on a cylindrical surface coaxial with the roller or wheel and its circular arc. It has multiple widths arranged on the same surface. The height of the belt is less than the height of the width, two rocker arms are mounted on the rigid support, and the yarn entry arm is located close to the zone where the belt contacts the roller or wheel. Then, the knitting yarn outlet side arm separates the belt from the roller or wheel.

Or close to a moving band. These arms are swingable between a position in which the individual threads move at the level of the belt and a position in which the threads move parallel to the belt;
The knitting yarn outlet arm is characterized in that, on the side close to the roller or wheel, an outlet gap is provided through which the knitting yarn that has passed through the roller or wheel can pass; - always moves parallel to the belt, even under such operating conditions.

In order to understand more clearly the structure and characteristics of the knitting yarn feeding device according to the invention, two embodiments will now be described, by way of non-limiting example only, with reference to the accompanying drawings.

First of all, reference is made to FIGS. 1 to 4, in which it is shown that the yarn feeding device for a knitting machine consists of a rigid support or casing 1, on which are A roller or wheel 2 is mounted so that it can rotate freely around its axis. The outer circumference of this roller or wheel 2 is defined by a plurality of cylindrically arranged metallic threads 3.

An annular continuous tape belt 5 is placed over a short circular arc portion of the cylindrical portion determined by the width 3 (Fig. 4), and its width is as follows:
As can be seen from Figures 1 to 3, it is considerably shorter than the length of conduit 3. When the roller or wheel 2 rotates, the belt 5 also rotates without slipping on the roller or wheel.

In the casing 1 of the device, a supply or artificial arm 6 with a thread 7 (e.g. consisting of a small ring of ceramic material) is swingably attached to a horizontal bottle (see FIGS. 1 to 3). ing. The supply or artificial side arm 6, through which the knitting yarn 8 from a spindle-shaped yarn or other similar material (not shown in the figure) slides, is
It oscillates between two positions which are the stroke ends. At one end of the stroke, the thread 7 is located lower than the upper end of the belt 5, and at the other end of the stroke this thread moves to the side of the belt. In the first position (FIG. 1) the device is working, but in the second position it is not working. Furthermore, it must be remembered that it is not strictly necessary that the thread 7 should be lower than the upper edge of the belt or tape 5 in the working position. This is because even when the thread 7 remains at a position higher than the upper end, the knitting thread 8 is slightly slid and moved to a position lower than the upper end of the belt. This is because means such as fixed or adjustable rods are provided. Such a construction is known per se and is described in German Patent No. 1.5.
No. 85.298 and German Published Application No. 1,635,
No. 893.

Further, a vibrating outlet arm 9 is mounted on the casing 1 and is rotatable around a horizontal axis in relation to FIGS. 1 to 3. In this arm 9 there is a thread (also usually a frame of small rings of ceramic material), indicated by the reference numerals 10 and 11 respectively, through which the thread 8 from thread 7 passes. .

The function of the outlet arm 9 is well known per se and will not be elaborated further here. Such an arm is held in a downward position by a knitting yarn 8, which is maintained under tension while being drawn out by the needles of the knitting machine, as shown in FIGS. 1 to 3. It may be enough to write down what you are doing. If this tension is lost (e.g. because the knitting yarn is no longer drawn out by the associated needle or has simply broken), the outlet side [arm 9 is automatically The arm 6 on the other side
from the working position of FIG. 1 to the non-working position of FIG. This occurs when the knitting yarn is in the downward position (Fig.
(FIGS. 3 and 4) This is done in order to release the knitting thread 8 from the contact zone between the belt or tape 5 and the surface of width 3 against which it is pressed, which holds and tensions the knitting thread.

The structure of the device described so far is well known;
Therefore, no further details are necessary to illustrate its operation.

However, a particularly important problem is that when the needle no longer pulls the yarn, or only pulls it a small amount, in order to interrupt the continuous feeding of the yarn to the needle,
It must be pointed out that it is the fastest transition of the knitting yarn from the tensioned position of FIG. 1 to the inactive position of FIG.

For this purpose, according to the invention, a fixed outlet side thread 12 is arranged on the device and integrated with the casing 1 of the device via a small bracket 13.

As clearly shown in FIGS. 1 to 4, the threads 12 are located in close proximity to the rollers or wheels and are offset laterally with respect to the belt 5 (from FIGS. It is above in Figure 3).

As a result, the knitting yarn 8 passes through the thread 12 after passing through the thread 7 and before passing through the threads 10 and 11 of the knitting yarn outlet arm.

Because the position of the thread stitch 12 is fixed, the operating state (first
The knitting yarn 8, which is pressed against the width 3 by the belt 5 in Figs. , the fixed threads 12, as clearly shown in FIG. Acts on the knitting yarn (trying to separate the knitting yarn from contact).

First of all, this means that the length of the loop yarn contained and pressed between the belt or tape 5 and the width 3 is greater than the range or length of the arc constituting the actual contact area of the on-axis belt. This is due to the fact that it is also short.

Furthermore, the provision of the fixed thread 12 allows easier and faster upward rotation of the outlet arm 9, which reduces the tension in the knitting yarn coming out of the device.

This occurs if the fixed stitches 12 are located in a high position, i.e. the knitting yarn passes through a position close to the pivot pin of the outlet arm 9 and the stitches 10 and 1 of the outlet arm 9
1. Thus, without the fixed thread 12, during knitting yarn feeding, the knitting yarn would be stuck between belt 5 and thread 10.
The distance or spacing between the pivot pin of arm 9 and the yarn will therefore be tight. This causes an increase in braking for upward movement of the arm.

Next, as a result, due to the two factors mentioned above, providing the yarn stitch 12 at the position described with reference to FIGS. The reaction rate is greatly increased and the unset yarn can be released more quickly than is obtainable with known similar devices without the fixed yarn 12 described above.

5 and 6 show a modified thread, and the thread 2 in FIGS. 1 to 4 is a thread 22 that is integral with the arm 23.
has been replaced by The arm 23 has a horizontal axis 24
A rotatable sleeve tube is mounted on the shaft 24, on which the arms 6 and 9 are keyed. The shaft 24 and sleeve tube 25 are internally coupled for rotation in opposite directions (not shown for simplicity). When the arm 6 rotates,
Arm 23 also rotates. However, this embodiment of the device is characterized by the fact that the thread 22 always moves laterally both under operating conditions (FIG. 5) and under non-use conditions, and as shown in FIG. It is further characterized by the belt 5.

Therefore, since the movable thread 22 in any case substantially assumes the position of the fixed thread 12 under the operating conditions of the device (FIG. 5), the movement and effect of the movable thread 22 is similar to that of the fixed thread 12. This is the same as what was said regarding.

From the above it will be readily understood that the structure of the improved knitting yarn feeding device according to the invention is extremely simple and it is easy to make modifications to similar R″1 (F-devices) of known types. .

Furthermore, since the device is used in exactly the same way as known devices currently on the market, no problems will arise from using the device.

[Brief explanation of the drawing]

Figure 1 is a front view showing a device with a fixed exit side yarn stitch, and is a diagram showing a state in which the knitting yarn supplied to the needles of the knitting machine is being pulled during operation. Figure 2 is the same as Figure 1. Figure 3 shows the device in a state in which the device is not working and the knitting yarn is neither pulled nor fed to the needles of the knitting machine;
The figure is a side view from the direction of the arrow mark in Fig. 1, Fig. 4 is a top view from the direction of the arrow ■ in Fig. 1, and Fig. 5 is a side view from the direction of the arrow mark in Fig. 1.
Fig. 6 is a front view showing a part of the same device as in Fig. 5, but a movable exit side yarn [] is provided and the knitting yarn is fed; Fig. 6 is similar to Fig. 5; FIG. 3 is a diagram showing the apparatus in a state where the movable outlet side yarn is pulling the knitting yarn. 1: Support body, 2: Roller or wheel, 3: Width, 5: Belt, 6: Entrance side arm, 7: Thread grain, 8: Knitting yarn, 9:
Outlet side arm, 1o, tl: thread, 12: fixed exit side thread, 22: thread, 23: arm, 24: shaft, 25 Ni sleeve tube Applicant: Savio & C, Nis, Bee, Ni, Cutsukoni Enzo & C, Nis en. C.

Claims (1)

[Claims] 1) An IJ roller or wheel is rotatably mounted on a support that can be fixed to a machine, and this roller or wheel has a number of rollers or wheels arranged on a cylindrical surface coaxial with the roller or wheel. A belt having a convergence and having a width shorter than the length of this width is hung in an arc contact with a roller or wheel, and two swinging arms having a thread L for threading the knitting thread are attached to the support. The yarn entry side arm is close to the area where the belt begins to come into contact with the rollers or wheels; the J side arm is close to the area where the belt leaves or moves away from the rollers or wheels; In a device in which the yarn oscillates between the position of the belt and the position where it has slipped from the belt, there is an outlet where the loop yarn that has passed through the roller or wheel is passed through the knitting yarn exit side arm and a position very close to the roller or wheel. [A knitting yarn feeding device for a multi-fall knitting machine, characterized in that a first side yarn is provided, and the exit side yarn is always located at a position offset from the belt under any operating conditions of the device. 2) The knitting yarn feeding device for a multi-fall knitting machine according to item 1 of the patent JpI tree, characterized in that the first side yarn is provided integrally with a roller or wheel support. 3) The exit side yarn is provided on a movable arm that is keyed to a rotating shaft, the knitting yarn entrance arm is also keyed to the rotating shaft, and the exit side yarn can be moved between both positions at the stroke end. The knitting yarn feeding device for a fall knitting machine according to claim 1, characterized in that the knitting yarn feeding device for a fall knitting machine is positioned offset from the belt at each position of the stroke end.