DE6918849U - Auxiliary countersinks for circular knitting or circular knitting machines - Google Patents

Description

PATENT ANWXLTE

DR. E. WIEGAND DIPL-ING. W. NIEAAANN DR. M. KÖHLER DIPL-ING. C. GERNHARDT

MÖNCHEN HAMBURG

TELEPHONE: 395314 2000 HAMBURG 50, May 8, 1969

TELEGRAMS: KARPATENT KDNIGSTRASSE 28

W.23663 / 69 12 / Ne

The Singer Company, Elizabeth, New Jersey (V.St.A.)

Auxiliary countersink for circular knitting or circular knitting machines.

The invention relates to circular knitting machines (hereinafter "circular knitting machines" for the sake of simplicity) called), which are provided with sample wheels, and the invention in particular creates a Sample wheel feed an improved auxiliary sinker (wing cam), which works together with the needles of the circular knitting machine can after these are optionally lifted from the sample wheel.

On a circular knitting machine equipped with pattern wheels, it is common practice to do this on each The machine's pattern wheel feed station has all needles on to raise a predetermined height and then selectively pick up certain needles using the pattern wheels at that station Lifting catch height and other needles to knitting height. the Needles that are not raised to catch height or knitting height are, by means of an auxiliary sinker at the transmission level returned.

As a result of the possibility that the feet of incorrectly raised needles may

can collide and this leads to the breakage of the auxiliary sink or the needles, it is customary to make the auxiliary countersink radially adjustable to save it To bring cooperation with the machine needles, i.e. to deflect it in the direction against the axis of the machine against the force of a spring. Because the auxiliary sinker from the position of the cooperation with the needle feet deflectable it is usually carried out so that it can easily be placed in a position to cooperate with the Machine needles can be returned as soon as the incorrectly raised needle or incorrectly raised Needles have passed, for this the auxiliary countersinks are generally of a blade-like design, so that they are of can even return to their position by grasping between the feet of adjacent needles. In the USA patent 2 006 821 shows a radially deflectable auxiliary countersink of the type shown in with sample wheels provided knitting machines is usually available.

By using a blade-like auxiliary sinker a problem arises while allowing its return after the deflection, that with lower Speed knitting machines are not particularly noticeable, but in modern, at high speeds Speed working knitting machines is very annoying. For needles that are drawn from a pattern wheel over the leading edge an auxiliary sinker to work with I a sinker (stitch draw cam) when the knitting machine is operating at high speed, an attempt to have a quick rebound, i.e., bounce downward such needles when they hit the countersink. The rebounding of the needles instead of the desired ones Gradual downward movement of a needle along a countersink results in drop stitches in the one in question standing machine knitted goods. This results in sie because

the needles after they have been raised to knitting or casting height at a given feed station, suddenly shot downward to a point due to her hitting the countersink at that feed station which is below the height at which the thread is to be drawn, so that such needles have their feed Missing yarn and therefore dropping their respective stitches without forming new loops with them.

Aside from the formation of drop stitches, the use of an auxiliary sinker of a known type makes a knitting machine equipped with pattern wheels necessary to use friction needles in the knitting machine, i.e. needles, which are bent sufficiently that, once lifted off a sample wheel, they move hold themselves in their position in the relevant needle slots. Would such friction needles with the known If the explanations are not used, the optional setting of the needles by the pattern wheel would be meaningless Be a process, such needles always fall freely into their lowest positions in the relevant needle slots could, regardless of how they were influenced by the pattern wheel. Also, the familiar use leads from friction needles in a knitting machine equipped with pattern wheels to an unfavorable energy consumption, and the associated common problems regarding the operation of such a machine are one thing that is of no small importance if it is taken into account that in an ordinary circular knitting machine several Hundred needles present si ^ a.

To the problems of energy consumption and needle adjustment, which see known, equipped with sample wheels Knitting machines according to the use of friction needles result, as well as the problem of the formation of drop stitches when working with one equipped with pattern wheels ^ Turn off knitting machine at high speed,

the invention creates an improved auxiliary sinker, wel-

I rather the feet of raised needles so inevitably in-

; within and along a narrow path that leads

firstly the needles can be frictionless and secondly j a rebound of the needles from a countersink when

I equally high machine speeds impossible

', this being accomplished in such a way that the

) Self-restoring property is retained, which is

i using a blade-like auxiliary sinker is obtained.

I For this purpose, the invention provides a veroin-

! . with the relevant sample wheel feed station

ι Circular knitting machine to use hybrid auxiliary countersink before,

) whose front part (in the direction of the relative needle

ι movement) is blade-like and its rear part is a

[Cushion cam represents the one with the sinker

the feed station in question can work together, : to determine a path limiting the needle root. In

In other words, the sub-sink according to FIG ! Invention so that he had two previously conflicting

Can exercise lowering functions, intentionally a two-height design given, with between its front part and; his rear part is formed a step, whereby a

: blade-like leading edge is so determined that a

I ^ effective rear guiding part is preserved.

j A main purpose of the invention is to provide a

! improved auxiliary countersink for use with sample

: to create wheeled knitting machines.

Another purpose of the invention is to provide a

. to create radially adjustable auxiliary countersink that

j is that an inevitable needle control during

the stitch setting is obtained for needles that have been lifted by means of a pattern wheel of the knitting machine [ are.

Another purpose of the invention is to provide an improved pattern wheel section for a knitting machine

to create, which contains a radially adjustable auxiliary countersink, which has a blade-like leading edge and a rear guide portion which is adapted to the radial resetting of the auxiliary countersink is not prevented.

The invention is explained below with reference to the drawing, for example.

Fig.IA and IB are schematic representations for

Explanation of the invention.

Figure 2 is a perspective view of a pattern wheel section a knitting machine with an auxiliary countersink according to one embodiment of the invention is provided.

FIG. 5 is a partial sectional view illustrating the manner in which the FIG Fig. 2 reproduced auxiliary countersink is radially adjustable.

Figures 4A and 4B are top and side views, respectively, of another embodiment of the Auxiliary sinker according to the invention.

In Fig. 1A, two friction knitting needles 10 and 12 are shown in the position in which they are ready with an auxiliary countersink 14 or with a stitch-pulling cam or Countersink 16 to engage. It can therefore be assumed that the needle 12, for example, from a pattern wheel has been raised to a level L at which the needle 12 picks up yarn Y and stitches along a line F in the fabric forms. It is also assumed that the needle 10 has not been lifted by a sample wheel and its foot 18 is located under the auxiliary sinker 14 and that the needle 10 is lowered to the transmission height (world height) before it reaches a point where it begins to pull Yarn off.

As is known, the auxiliary countersink 14 can be deflected radially against spring force (i.e. according to FIG. IA in the direction towards the plane of the drawing), so that in the case of an incorrect one caused, for example, by a pattern wheel

Unintentional lifting of a needle through the butt of the needle hits the front edge 20 of the auxiliary sinker 14, neither the auxiliary sinker nor the needle foot breaks, since the needle butt pushes auxiliary sinker 14 out of the way. Because of the deflectability of the auxiliary sinker 14, it is intentionally blade-like executed. If it weren't for that, the auxiliary sinker could Do not see yourself moving back to a position in which it cooperates with the butt of the needle. From Fig, IA is it can be seen that the auxiliary countersink 14 can grip between the feet of adjacent needles, so that once it is off the position of cooperation with the needle butts deflected is, the needle feet do not keep the auxiliary sinker 14 permanently out of its usual position.

It is desirable that the needles, raised, for example, by a pattern wheel, remain raised and then lowered along the length of the countersink 16, drawing off yarn at height L and forming uniform stitches in the fabric along line F. As the speed at which the knitting machine is driven increases, the possibility that the needles will strike the countersink 16 and rebound therefrom increases. Thus, if at a given machine speed a raised needle such as needle 12 hits countersink 16, it will be shot straight downward and so remains below yarn feed level L, as shown in dotted lines. so that the yarn Y never completely misses and causes drop stitches.

It is known that the needle is in a narrow path to lead by means of a guide part of the auxiliary countersink, which is arranged under a corresponding countersink, however such a measure, if no further modification is made, the actual function of the blade-like auxiliary sinker completely wrecked that to work with a knitting mesh pattern wheel has proven essential.

mi ι · «*

I ₁ II »* · I

Il · ·

In Pig. IB is a hybrid auxiliary sinker according to the invention shown, the leading edge 20 'a blade-like Represents part that can find its way between neighboring needles just as easily as the leading edge 20 of the auxiliary sinker 14 according to ^ ig. IA. The trailing edge 22 is a guide member which has a smaller radial thickness than the leading edge 20 '(around the blade edge to create), but it has sufficient radial width so that the foot 23 of the needle 12 'within ier of the surfaces 16 and 22 limited career can be performed. Accordingly, the needle 12 'can not only be smooth Be a needle, but the disadvantageous rebounding of the needle is also avoided by the invention.

The sample wheel block 24 shown in Fig. 2 and 3 is the Musterrt.dblock according to the German patent application P 17 85 290O similar, but it is on an improved one Auxiliary countersink directed according to the invention.

On the block 24, a pattern wheel 26 is rotatably mounted, which the needles according to the position of the sinkers in the Slitting of the pattern wheel optionally lifts. To your block 24 a front part 32 is also fastened by means of screws (not shown), the front edge 36 of which is a lifter to raise the needles at about catch height. In the illustrated embodiment of the invention, needles are with two feet are used with the lower foot of each needle running up on the surface of the lifter 36 while the upper foot each needle from the pattern wheel 26 can optionally be lifted. A cam piece 38 is also attached to the block 24, which presents a guide face 40 which prevents that the needles move irregularly.

The block 24 is provided with an inclined surface 44 on which a support arm 46 is attached, which between them and the surface 44, a stitching cam or countersink 48 slidably accommodates. The countersink 48 is from a spring

Il I

Il I) I)> ia

1 ί I 1 y

pressed upwards in the block 24 by means of a Screw 52 is fixed. An angle lever 56, which is described in the above-mentioned German patent application nMher 1st, has an arm 54 which, contrary to the Force of the spring 50 on the upper end of the countersink 48 presses. The angle lever 56 pivots on an axis 58 in response to the setting of a button 62.

The front part J52 is provided with a cutout 64 « in which the hub 66 of an auxiliary countersink arm 68 on a · « Pin 69 is pivotably mounted. The front part 32 is also provided with an undercut 70 "which can usually accommodate the auxiliary sinker arm 68" of a spring 72 is pressed into this undercut 70

(Pig. 5).

At the upper end of the auxiliary countersink arm 68, a two-height auxiliary countersink 76 is arranged, the front edge 78 of which is designed like a blade in the direction of the relative needle movement. The rear part 80 of the auxiliary countersink 76 delimits together with the F ¹ Uc) Ie of the countersink 48 a needle foot raceway 82 and is more sehisal in the radial direction than the front edge 78 of the auxiliary countersink, co that an intermediate step 84 is formed. The foremost part 88 of the leading edge 78 of the auxiliary countersink 76 is beveled in the radial direction, so that when the foot of a misaligned needle hits this edge, the auxiliary countersink 76 is deflected radially out of the way of the needle base and into one against the force of the spring 72 Recess 90 of the block 24 is performed (Fig. 3).

In Fig. 2, two needles 92 and 94 are shown by dashed lines, it being assumed that the needle 92 is first from the lifter 36 and then from the pattern wheel 26 has been lifted. The butt of the needle 92 occurs when this needle is moved longitudinally in the usual manner into the A raceway 82 and is inevitably guided therein, the needle 92 as well as the needle shown in Fig. IA

12 is prevented from rebounding, regardless of the speed at which the in question Machine is operated.

With regard to the second needle 9 ^ it is assumed that it has been raised by the lifter 56, but not raised further by a corresponding plate of the pattern wheel 26. Accordingly, the foot of this needle 94 is moved longitudinally in the usual manner so that it comes under the blade-shaped leading edge 78 of the auxiliary countersink J6 , whereby the needle 94, like the needle 10 shown in FIG. 1A, is guided at the transfer height.

If the needle 94 -for example due to the between her and the walls delimiting the slots of the pattern wheel 26 unintentionally partially existing friction has been raised to a point where lateral movement of needle 94 causes its foot to rest on the. Part 88 of the leading edge 78 of the auxiliary countersink 76 hits, then the auxiliary countersink is in the recess 90 in the block 24 pressed in. This means that when the misaligned needle butt rests on the beveled edge portion 88 of the Auxiliary sinker 76 runs up, it causes the auxiliary sinker arm 68 to be pivoted about its pin 69 (FIG. 3) and thereby the auxiliary sinker 76 moved out of the path of the needle butt so that both the auxiliary countersink and the needle butt are protected against breakage. The lateral movement the misaligned needle butt will eventually cause the needle butt to fall into the raceway 82, and if so When this occurs, the blade-shaped leading edge 78 of the auxiliary countersink 76 begins by itself in its position between adjacent needles in the manner discussed in connection with Figure IA.

It can therefore be seen that on a radially deflectable auxiliary sinker there are two previously contradicting control functions are provided by adding a two heights to the auxiliary countersink leadership is given.

- ίο -

Various modifications are possible in the illustrated embodiment within the scope of the invention. For example can, as shown in Fig. 4A and 4B, An auxiliary countersink can be provided in which both the front part and the rear part are designed like blades are, provided that the front part 100 is wider in the radial direction than the rear part 102 and that the rear part 102 can work together with a countersink so that it limits a needle foot race with this.

Claims (1)

Protection claims 1. Sample wheel feed station of a circular knitting or Circular knitting machine in which a lifter, a pattern wheel and a countersink follow one another in the direction of the relative needle movement are arranged with the pattern wheel selected needles raised from the lifter in can lift predetermined knitting heights, characterized in that that in the direction of the relative needle movement between the pattern wheel (26) and the countersink (48) an auxiliary countersink (76) is arranged, which by a spring device in the radial direction of the machine in its position for the Is pressed to cooperate with the needles and has a first part (78) and a second part (80), wherein the first part (78) of the auxiliary countersink (76) is formed in the shape of a blade, in the direction of the relative needle movement in front of the second part (80) has a larger radial dimension than the second part (80), with a given needle can come into contact if the second part (80) does not, and those needles that are from the pattern wheel (26) are not optionally raised, caught and lowered, while the second part (80) of the auxiliary sinker (76) cooperates with the countersink (48) in order to limit a track (82) along which the feet of the needles are forced to move. ". Circular knitting machine section with a lifter that cooperates with the needles of the machine, a pattern wheel arranged to work with certain of the Lifter lifted needles optionally cooperates, an auxiliary sinker, which those needles that are from the pattern wheel are not optionally raised, able to lower, a device that biases the auxiliary sinker so resiliently, that it engages the needles of the machine and a countersink that selectively lifts those raised by the pattern wheel Able to lower needles, characterized in that I I 1 · ν » the auxiliary sink? (76) has a first part (78) and a second part (30), of which the first part (78) is wider than the second part (So) and lies in front of the second part (80) in the direction of the relative needle movement, and that the second part (80) can cooperate with the S <nker (48) in order to delimit a track (82) for the positive guidance of the feet of the needles. 5. Arrangement according to claim 1 or 2, characterized in that that the needles of the knitting machine are of the smooth type.