EP2072649A1 - Take-off cam part - Google Patents

Abstract

The pull-off part has a part (12) with a head (34), and another part (11) with a thread retaining opening (26), where the parts are moved relative to each other for closing the thread retaining opening by the head. The parts are longitudinally movable to each other, and the thread retaining section has a section extending in a longitudinal direction (13). The thread retaining opening extends away from the head, and the head has an inclined surface (37) turned towards the thread retaining opening, where the inclined surface is adapted to an inlet section (30) of the thread retaining section.

Description

The invention relates to a trigger member for a trigger comb for a knitting or knitting machine.

In a knitting or knitting machine, the stitches must be pulled off the needles after the stitching operation. For the beginning of the knit a deduction comb is often used. This serves to grasp the first course and pull controlled from the knitting point away.

Such a withdrawal comb is for example from the DE 10 2006 005 384 A1 known. He has in a body held, mutually parallel-oriented trigger parts, which are provided at their ends with a head. This acts as a hook. In the trigger part is a slider mounted longitudinally displaceable. This has an upside-down pointed end which can be pushed up and away from the head to close or open a suture containment space.

A similar deduction part is from the EP 0 477 483 B1 known. There, a slider is mounted in the provided with a head trigger part, which has a finger-like extension. The withdrawal part is provided with an obliquely oriented to the longitudinal direction parallelflankig limited opening through which the finger-like extension can extend therethrough to close or release a Fadeneinschlussraum.

From the same document, a thread withdrawal part is also apparent, which uses a thread clip mounted in the yarn withdrawal part for thread inclusion. This is provided on a slide. The hook tip can be inserted into the thread receiving space or pushed out of this.

Such an arrangement is also known from DE 40 03 667 C2 known. Again, a slide mounted in the withdrawal part and provided with a hook at the end serves for grasping and releasing the thread.

When using such deduction combs and trigger parts neither the threads nor the trigger parts should be exposed to excessive loads or even damage.

It is therefore an object of the invention to provide trigger parts that are sturdy and protect the thread. This object is achieved by the deduction part according to claim 1:

The withdrawal part according to the invention has a first part on, which has a thread receiving opening. The trigger part also has a second part with a head which serves to close the thread receiving opening of the first part, when the two parts are moved according to each other. The thread receiving opening extends away from the head, wherein the head has an inclined surface facing the thread receiving opening.

If the thread receiving opening is open, i. ready for receiving or releasing a thread, the head is at a distance from the thread receiving opening in front of the same. Relative to the longitudinal direction of the parts, the head is moved away from the thread receiving opening in the longitudinal direction and thus projects longitudinally in front of the opening. If the thread receiving opening is closed, the head is immersed at least a small piece in the thread opening in order to block it.

The oblique surface provided on the head serves as a sliding surface. It is oriented obliquely to the longitudinal direction of the individual parts of the trigger part. Preferably, it forms an acute angle with the sliding direction of the second part, which carries the head.

The first part and the second part are preferably arranged longitudinally displaceable relative to one another. The term "longitudinal" refers to the longitudinal direction of the elongated parts and at the same time to the direction of displacement of the parts against each other. Preferably, the two parts are supported against each other, for example, by a first of the two parts is mounted in a longitudinally extending cavity or channel of the second of the two parts. In this case, the second part completely or partially U-shaped, L-shaped or even along its entire or part of its longitudinal extent in cross section all around be formed closed. In other words, the channel for receiving the first part may be open at one or more locations or closed over its longitudinal direction.

The thread receiving opening of the second part preferably extends to the free end and thus opens at the end face of the second part. The thread receiving opening preferably has a section extending in the longitudinal direction of the second part. This section is oriented parallel or at an acute angle to the longitudinal direction. Preferably, the thread receiving opening widens toward the front end of the second part. This can be effected in that the thread receiving opening of the second part has a funnel-shaped edge. Such can be formed by the edge of the thread receiving opening which is initially oriented parallel to the longitudinal direction, extends in the end region, which is arranged in the region of the opening, at an acute angle to the longitudinal direction. It suffices if this applies to that flank of the thread receiving opening which lies opposite the second part or a thin rod section of the same. Thus, the thread between the respective edge and the first part or its head in the thread receiving opening into and out of this are out.

Preferably, the head of the first part has an inclined surface, which is adapted to the flank or to the edge of the thread receiving opening. The adaptation can e.g. in that the inclined surface of the first part is oriented substantially parallel to the edge of the second part.

On the opposite side of the head with a Be provided end surface, which is inclined in opposite directions to the inclined surface. In other words, the oblique surface and the end surface preferably each include an acute angle with the longitudinal direction, with the vertexes of these two acute angles pointing away from one another.

• Figur 1 eine Strickmaschine und eine Abzugseinrichtung in vereinfachter Vertikalschnittdarstellung,
• Figur 2 einen Abzugskamm gemäß Figur 1 in perspektivischer, schematisierter Darstellung,
• Figur 3 den Abzugskamm nach Figur 2 in Perspektivansicht,
• Figur 4 ein Abzugsteil, wie es in dem Abzugskamm nach Figur 3 in großer Anzahl angeordnet ist, in längs geschnittener Darstellung,
• Figur 5 das Abzugsteil nach Figur 4, geschnitten entlang der Linie V-V,
• Figur 6 bis 10 das Abzugsteil nach Figur 4 in verschiedenen Phasen beim Fassen und Freigeben des Fadens,
• Figur 11 eine alternative Ausführungsform des Abzugsteils in geschnittener Seitenansicht und
• Figur 12 das Abzugsteil nach Figur 4, geschnitten entlang der Linie XII-XII.

Further details of advantageous embodiments of the invention are the subject of the drawing, the description or claims. The description is limited to essential aspects of the invention and other circumstances. The drawing discloses further details and is additionally to be used. Show it:

• FIG. 1 a knitting machine and a withdrawal device in a simplified vertical sectional view,
• FIG. 2 a trigger comb according to FIG. 1 in a perspective, schematic representation,
• FIG. 3 the deduction comb after FIG. 2 in perspective view,
• FIG. 4 a deduction part, as in the deduction comb after FIG. 3 arranged in large numbers, in longitudinal section,
• FIG. 5 the deduction part after FIG. 4 , cut along the line VV,
• FIGS. 6 to 10 the deduction part after FIG. 4 in different phases when grasping and releasing the thread,
• FIG. 11 an alternative embodiment of the trigger part in a sectional side view and
• FIG. 12 the deduction part after FIG. 4 , cut along the line XII-XII.

In FIG. 1 a draw-off comb 1 is illustrated on a knitting machine, which is designed as a flat-bed knitting machine and is illustrated by means of two needle beds 2, 3. The needle beds 2, 3 each have parallel needle channels with needles 4, 5 mounted therein, which serve to produce a knitted fabric. Locks for driving the needles 4, 5 are present, but not illustrated. Between the needle beds 2, 3 and the needles 4, 5, a comb spacing 6 is formed, in which a trigger comb 7 can pierce from below. There may also be other extraction means, such as two take-off rolls 8, 9 may be provided which can come into engagement with the fabric when the fabric has been guided by means of the trigger comb 7 far enough down.

The withdrawal comb 7 is in FIG. 2 separately illustrated. It has a number of juxtaposed trigger parts 10, which are identical to each other. The withdrawal comb 1 is in FIG. 3 illustrated again. He holds the trigger parts 10 in spaced, mutually parallel alignment. The trigger parts 10 are elongate and each consist of at least two parts 11, 12 which are movably mounted to one another in a longitudinal direction 13. For this purpose, the first part is fixedly mounted on a corresponding bed 14. The bed 14 is for example a bent sheet metal part with teeth, between which the first part 11 is taken. The second part 12 is gripped, for example, on a rail 15, which is movable against the bed 14. For targeted adjustment of the rail 15 in the longitudinal direction 13 is a suitable drive 16, for example in the form of a displaceable transversely to the longitudinal direction rail 17. The rail 15 is eg with a foot of the second part 12 in connection to this against the part 11 move.

A deduction part 10 is representative of all in FIG. 4 in longitudinal section and in FIG. 5 illustrated in cross-section. Its second part 11 forms an elongated body which has a channel 18 extending in the longitudinal direction 13. The channel 18 has, as FIG. 5 shows, for example, a rectangular cross-section and is bounded by two side walls 19, 20 and two narrow-side walls 21, 22. In the present embodiment, the second part 11 is thus formed as a rectangular tube. His in the bed 14 taken end 23 (see FIG. 3 ) is in FIG. 4 not shown. The other end 24 ( FIG. 4 For this purpose, it has a thread receiving opening 26, which extends from the front end 24 into the second part 11 and in particular passes through the side walls 19, 20.

The thread receiving opening 26 has a slot-like portion 27 which is bounded by two preferably straight flanks 28, 29. The closed end of the section 27 is preferably formed by a rounded arc, which connects the flanks 28, 29 together. Toward the open end 24, the thread receiving opening 26 expands. While the flank 29 is straight up to the end 24, the flank 28 preferably transitions slightly rounded into an inlet section 30 which diverges away from the flank 28. The inlet section 30 terminates at the wall 21. Below this terminal 31, the flank 29 can begin to diverge towards the wall 22. This can be done in a rounding, in a slant or with any other appropriate form. By contrast, the inlet section 30 is preferably substantially straight. Thus, a funnel-shaped mouth is formed between the flank 29 and the inlet section 30.

In the channel 18, the first part 12 is longitudinally displaceable stored. The engaging with the rail 15 end 32 of the first part 12 is made FIG. 3 can be seen in FIG. 4 but not shown. The first part 12 extends through the channel 18 and protrudes, as FIG. 4 shows, with one end 33 frontally out of the channel 18 out. While the end 33 forms a head 34, the first part 12 continues from the head 34 as a straight stem 35 through the channel 18. The shaft 35 rests with its preferably straight back on the preferably also straight wall 22. His measured from there starting height is preferably as large or slightly less than the distance of the inner surface of the wall 22 of the flank 29 in the area of the thread receiving opening 26. Outside the thread receiving opening 26, the shaft 35 of the part 12 a different height, especially a larger Have height.

At least following the head 34, the shaft 35 has at its location adjacent to the thread receiving opening 26 a straight breast 36, which is arranged parallel to the flank 29 or is in alignment therewith or congruent. Following this breast, the head 34 has an inclined surface 37, which preferably follows substantially a straight line. The inclined surface 37 can merge with a rounding in the chest 36. The inclined surface 37 is inclined α against the longitudinal direction 13 at an acute angle. This opens away from the end 24 of the second part 11 and thus has with its apex to the thread receiving opening 26, i. to the first part 12 out.

The inclined surface 37 of the first part 12 is preferably oriented approximately parallel to the inlet section 30 of the second part 11. The parallelism does not have to be perfect. Some degrees of angular deviation are tolerable and useful in individual cases.

The head 34 has a height that is preferably less than the distance between the walls 21, 22. The inclined surface 37 merges into a plateau 38, which is preferably arranged approximately parallel to the back 39 of the first part 12. Thus, the head 34 can partially or completely retract into the channel 18 as needed.

With a rounding, the plateau surface 38 merges into a termination surface 40 that extends to the outermost tip 41 of the head 34. The end surface 40 may be rounded or, as shown, may consist of straight sections or a total of a single straight surface. It includes with the longitudinal direction 13 an acute angle β, the vertex of which points away from the second part 12. The hints α and β thus point in different directions. In other words, the inclined surface 37 and the end surface 40 are inclined in different directions, regardless of whether they are straight or curved.

The width of the first part 12 is less than the inner distance of the side walls 19, 20 from each other, so that a certain game, as from FIG. 5 can be seen, given. This makes it possible to move the parts 11, 12 in the longitudinal direction against each other and into each other.

The deduction described so far 10 works when picking up, including and releasing the thread 25 as shown in the FIGS. 6 to 10 seen:

To pick up the thread, the first part 12 according to FIG. 6 moved against the second part 11. Thus, the head 34 extends from the end 24 of the first part 11. Its inclined surface 37 forms with the inlet section 30 a wide, preferably approximately parallel flankig limited lane, which merges into the section 27 of the receiving opening 26 and is at an obtuse angle to this. In this state, the thread 25, as FIG. 7 indicated by a series of arrows 42, enter the thread receiving opening 26. In this case, the thread 25 can not hang on any edge, on any hook or on any other part of the trigger part 10.

If the thread 25 is received by the thread receiving opening 26, the parts 11, 12 as the arrow in FIG. 8 indicates relatively moved against each other, so that the head 34, like FIG. 8 shows penetrates into the end 24 of the second part 11. The inclined surface 37 enters the channel 18 and passes behind the inlet section 30. Thus, the thread receiving opening 26 is closed and the thread 25 is trapped in the same. In this condition, the fabric comprising the thread 25 can be removed, such as FIG. 9 suggests.

The release of the thread 25 can according to FIG. 10 respectively. For this purpose, the parts 11, 12 are again moved against each other so that the head 34 extends out of the channel 18 and the inclined surface 37 with the inlet portion 30 defines a gap. This gap is preferably at least as large as the width of the section 27. The thread receiving opening 26 is thus released. The thread 25 can, as indicated by the row of arrows 43, slide out of the thread receiving opening 26 out.

Neither on its way into the thread receiving opening 26 ( FIG. 7 ) still on its way out of the thread receiving opening 26 ( FIG. 10 ), the thread 25 may hang on parts of the trigger part 10, this bend or may cause other wear. In addition, the thread 25 is treated gently. He can neither pierced nor be torn.

Variations are possible in the described embodiment. For example, illustrated FIG. 11 a partially open channel embodiment 18. In this embodiment, portions of the otherwise existing wall 21 are omitted. The part 12 is thus according to FIG. 12 designed as an open U-profile. Otherwise, the previous description applies on the basis of the same reference numerals accordingly.

A trigger part 10 for gentle thread treatment and easy handling has two parts 11, 12, of which at least one is arranged to be longitudinally adjustable with respect to the other. While one of the parts 11 has a longitudinal slot 27 for receiving a thread 25, the other part 12 is provided with a unilaterally projecting away from its shaft 35 head 34 which is movable from the outside to the thread receiving opening 26 to close or from this way to release it. The head 34 has an inclined surface 37, with which the thread receiving opening 26 is closed. The new trigger part 10 has no hook and thus no problems in terms of process reliability. Its part 12 has a robust pusher head, which avoids possible deformations on the head. The deduction part 10 allows a reliable and proper insertion and release of the thread 25 of a knitted fabric.

reference numeral

1

off comb

2, 3

needle beds

4, 5

needles

6

cOMB pitch

7

off comb

8, 9

off rolls

10

off element

11

second part

12

first part

13

longitudinal direction

14

bed

15

rail

16

drive

17

rail

18

Channel of the second part 11

19, 20

side walls

21, 22

walls

23, 24

Ends of the second part 11

25

thread

26

Thread-receiving opening

27

Section of the thread receiving opening 26

28, 29

Flanks of the thread receiving opening 26

30

Inlet section of the thread receiving opening 26

31

Terminal of the inlet section 30

32, 33

Ends of the first part 12

34

Head of the first part 12

35

Shaft of the first part 12

36

Breast of the shaft 35

37

Inclined surface of the head 34

38

Plateau surface of the head 34

39

Back of the first part 12

40

end surface

41

top

42, 43

arrows

Claims (10)

Trigger part (10)
a second part (11) having a thread receiving opening (26),
a first part (12) having a head (34) by means of which the thread receiving opening (26) can be closed by a relative movement of the two parts (11, 12),
wherein the thread receiving opening (26) extends away from the head (34) and
wherein the head (34) has a thread receiving opening (26) facing inclined surface (37). Trigger part according to claim 1, characterized
in that the second part (11) and the first part (12) are arranged longitudinally displaceable relative to one another. Trigger part according to claim 1, characterized
in that the second part (11) and the first part (12) are mounted longitudinally displaceable relative to one another. Trigger part according to claim 1, characterized
in that the second part (11) has a free end (24) and that the thread receiving opening (26) of the second part (11) extends away from the free end (24). Trigger part according to claim 1, characterized
that the thread receiving opening (26) of the second part (11) has a portion (27) extending in the longitudinal direction (13). Trigger part according to claim 1, characterized
that the thread-receiving opening (26) of the second part (11) has a funnel-shaped inlet portion (30). Trigger part according to claim 1, characterized
in that the head (34) carried by the first part (12) is arranged in front of the thread receiving opening (26) of the second part (11) with respect to a longitudinal direction (13). Trigger part according to claim 6, characterized
in that the inclined surface (37) of the head (34) of the first part (11) is adapted to the inlet section (30). Trigger part according to claim 8, characterized
that the inclined surface (37) of the head (34) is oriented substantially parallel to the inlet section (30). Trigger part according to claim 1, characterized
in that the head (34) has, on its side facing away from the inclined surface (37), an end surface (40) which is inclined in a direction (β) which is opposite to the direction of inclination (α) of the inclined surface (37).

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