FIELD OF THE INVENTION
[0001] The present invention relates to a striping apparatus of a knitting machine, particularly
to a striping apparatus of a circular knitting machine.
BACKGROUND OF THE INVENTION
[0002] There are striping apparatus technologies of circular knitting machines well known
to people, such as
US Patent No.6655176 "Striping Apparatus For Circular Knitting Machines" and
US Patent No.5070709 (corresponding to
EP 0 319 444 A2) "Striping System For Circular Knitting Machine", which respectively disclose striping
apparatuses feeding different yam into the knitting needle of a knitting machine.
Besides,
US Patent No.5218845 "Circular Knitting Machine Striper Control System" discloses a controller for a striping
apparatus.
[0003] As shown in from Fig.1A to Fig.1D, the striper structure of the abovementioned
US Patent No.5218845 comprises: yam-changing plates 10; movable blades 11; and drive elements (not shown
in the drawings), used to drive the yam-changing plates 10 and the movable blades
11. In normal state, the yam-changing plate 10 is at a non-enable normal position,
and the movable blade 11 also withdraws back to the main body 12, and a hook 110 clips
the yam to position at the front edge 120 of the main body 12. As shown in Fig.1B,
when the machine begins to feed yarns, the drive element pushes the yam-changing plate
10, and then, the front end of the yam-changing plate 10 extends outward. Simultaneously,
the rear end 101 of the yam-changing plate 10 touches a first pin 111 of the movable
blade 11 to drive the movable blade 11 toward the left side of the Fig.1C until the
yam-changing plate 10 reaches an external yarn-feed position, and then, the hook 110
of the movable blade 11 releases a yarn Y, as shown in Fig.1C. Naturally, before the
hook 110 releases the yarn Y, the yarn-changing plate 10 has transferred the yam Y
to the yarn-feed position, and a knitting needle 13 hooks the yam Y to perform knitting
operation.
[0004] Lastly, when yam is intended to change, the yam-changing plate 10, which has reached
the external yarn-feed position beforehand, will be pulled by the drive element back
to the normal position, as shown in Fig.1A. During the process that the yarn-changing
plate 10 moves to the right side of Fig.1D, a nose 102 of the yarn-changing plate
10 will touch a second pin 112 of the movable blade 11 and actuate the movable blade
11 to move rightward and back to the normal position, and then, the hook 110 of the
movable blade 11 will cut off the yarn Y and clip the tail of the yam Y at the front
edge 120 of the main body 12.
[0005] In general, such a striping apparatus can provide multiple different colors of yams;
for example, the four-color striping apparatus has four sets of parallel-arranged
yarn-changing plates 10 and movable blades 11 to change four kinds of yarns respectively,
and it is the same for the six-color striping apparatus; the more the number of yarns,
the greater the width of the striping apparatus. In the striping apparatus disclosed
in the abovementioned
US Patent No.5218845, as the movable blade 11 is driven by the yam-changing plate 10, the time that the
yam-changing plate 10 touches the second pin 112 of the movable blade 11 is later
than the time that the drive element begins pushing the yam-changing plate 10 toward
the normal position. Such a design that both the yam-changing plate 10 and the movable
blade 11 are driven by an identical drive element will bring about the delay of the
time that the movable plate 11 cuts off the yam Y In such a design that both the yam-changing
plate 10 and the movable blade 11 are driven by an identical drive element, when an
old yam and a new yam, e.g. a yam 1 and a yam 6, are spaced farther, the time difference
between two actions increases because of the larger spacing therebetween, and the
time of releasing the yam Y is too late so that the yam will be torn off when the
tail of the yam is still clipped by the movable blade 11 and a yamlet Y1 will still
remain clipped, as shown in Fig.1B; then, the yamlet Y1 will be released and tangled
with fabric; therefore, fabric quality is degraded.
[0006] EP 0 863 239 A2 discloses a yarn feeding and changing mechanism for a circular knitting machine according
to the preamble of claim 1, comprising a plurality of yarn feed fingers selectively
movable between operative and inoperative positions to feed yarn to the needles only
when in operative position. A first rocking jack is connected to each yarn feed finger
for moving the yarn feed fingers between operative and inoperative positions, and
a slider member is connected to each first rocking jack. A second rocking jack is
connected to each slider member and a plurality of pivotably selection members are
provided for imparting rocking movement to the second rocking jacks in a predetermined
pattern. The yarn feed fingers are thus moved from the operative to the inoperative
position while a yarn catcher and cutter catches the yarn and cuts the yarn to form
a free end which is held while the yarn feed finger is moved to the inoperative position,
is in the inoperative position and is moved to the operative position by way of an
extended position to present the held free end portion of the yarn to the needles
for knitting into the fabric instead of being cut into waste. A separate control of
the yarn feed fingers and a movable blade of the yarn feed unit is established via
linked elements, whereby the jack is cam driven.
SUMMARY OF THE INVENTION
[0007] It is an object of the present invention to provide an improved striping apparatus
of a circular knitting machine in order to avoid the appearance of yarnlets and improve
fabric quality.
[0008] The above object is achieved by a striping apparatus of a circular knitting machine
according to claim 1. Further advantageous embodiments are the subject-matter of the
dependent claims.
[0009] According to the present invention, different cams are separately used to drive the
yarn-changing plate and the movable blade, and even though a new yarn and an old yarn
are farther spaced, the timings of the cams can be adjusted to rapidly withdraw the
old yam and cut it off and to release the tail of the new yam from the movable blade
before it is torn off. Thereby, the present invention can prevent a yam from being
torn off lest yamlets appear, so that fabric quality can be improved.
[0010] The technical contents and preferred embodiments of the present invention are to
be described below in detail in cooperation with the drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
[0011]
Fig.1A to Fig.1D are schematic views showing the structure of a conventional striping
apparatus and the operation of the yam-changing plate and the movable blade.
Fig.2 is a schematic view showing a preferred embodiment of the striping apparatus
of the present invention.
Fig.3 is a schematic view showing a preferred embodiment of the drive unit of the
present invention.
Fig.4A is a schematic view showing the first portion of the yarn-feed unit at the
normal position.
Fig.4B is a schematic view showing the second portion of the yam-feed unit at the
normal holding position.
Fig.5A, Fig.5C, Fig.5E and Fig.5G are schematic views showing the sequential operational
steps of the yarn-changing plate of the striping apparatus of the present invention.
Fig.5B, Fig.5D, Fig.5F and Fig.5H are schematic views showing the sequential operational
steps of the movable blade of the striping apparatus of the present invention.
Fig.6 is a schematic view showing the relative positions of old yam, new yam and the
yarn-entering point of the knitting needle when yam is changed.
Fig.7 is a schematic view showing a preferred embodiment of the forward cam of the
second cam set of the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0012] As shown in Fig.2, according to one preferred embodiment, the striping apparatus
of a circular knitting machine of the present invention comprises: a controller 20,
a yam-feed unit and a drive unit. The controller 20 is driven by a selector 30, which
rotates around the knitting portion of the circular knitting machine. The selector
30 is a kind of electronic device functioning like cams and having multiple movable
elements 31, which are normally non-enabling. Under the control of a control circuit
or a central computer, the movable elements 31 can move to a triggering position.
When the selector 30 passes nearby the controller 20, the movable elements 30 at the
triggering position will actuate corresponding triggers 21 of the controller 20 to
move to an enable position.
[0013] The controller 20 further comprises: triggers 21, first safety levers 22 and second
safety levers 23. One end of the first safety lever 22 and one end of the second safety
lever 23 are installed to a sideboard 24 with a first pivotal shaft 221. The trigger
21 has a first end 210 and a second end 211; the first end 210 of the trigger 21 has
a protrudent return nose 212; the portion between the first end 210 and the second
end 211 has a second pivotal shaft 213, and the triggers 21 are installed to the sideboard
24 with the second pivotal shaft 213; and the second end 211 of the triggers 21 also
has a protrudent second nose 214. Refer to Fig.4A and Fig.4B. When in normal state,
the trigger 21, the first safety lever 22, and the second safety lever 23 are all
at a lock position; the second end 211 of the trigger 21 presses against the first
safety lever 22 and the second safety lever 23. When the first end 210 of the trigger
21 is moved by an external force, it will rotate around the second pivotal shaft 213
to the enable position, and the second end 211 of the trigger 21 will slide into a
notch 220 at the top side of the first lever 22 and a notch 230 at the top side of
the second lever 23, which enables the first lever 22 and the second lever 23 to swing
around the first pivotal shaft 221 upward to an unlock position. The entire controller
20 comprises multiple units, and each unit is formed of one trigger 21, one first
safety lever 22, and one second safety lever 23; those units are parallel arranged
into the entire controller 20. When in normal state, the relationship between the
trigger 21 and the first safety lever 22 of the same unit is shown in Fig.4A, and
the relationship between the trigger 21 and the second safety lever 23 of the same
unit is shown in Fig. 4B.
[0014] The yam-feed unit is fixedly installed in the perimeter of the circular knitting
machine and comprises two portions. The first portion further comprises: yarn-changing
plates 40, first connecting rods 41, and second connecting rods 42. The first portion
functions to feed a yam Y to a yam-entering position. The second portion further comprises:
movable blades 50 and a driving link 51. The second portion functions to clip the
tail of the yam Y when standby and to cut off an old yam, so that the old yam can
be released from fabric and the operation can restore the standby state. The abovementioned
controller 20 is fixedly installed above the yam-feed unit, and the preferred embodiments
of them are described below.
[0015] The yam-changing plates 40, first connecting rods 41, and second connecting rods
42 of the first portion interconnect head to tail to form a kind of three-bar linkage.
Multiple different colors of yarns Y separately pass different yam-guiding rings 25
and then pass the through-holes 401 at the front ends of the yam-changing plates 40.
When in normal state, the first connecting rod 41 is like a seesaw, and the tail end
of the first connecting rod 41 is coupled to the head end of the second connecting
end 42; the upper side of the central portion of the first connecting rod 41 has a
protuberance 412; the protuberance 412 contacts the bottom side of the first safety
lever 22 normally; the upper side of the head end of the first connecting rod 41 has
an upward forward-stroke protuberance 410, and the bottom side of the head end of
the first connecting rod 41 has a downward backward-stroke protuberance 411. The tail
end of the second connecting rod 42 is coupled to the tail end of the yam-changing
plate 40. The second connecting rod 42 functions to transfer the pulling force of
the first connecting rod 41 to the yam-changing plate 40 and transform the pulling
motion of the first connecting rod 41 into a motion of another direction in order
to actuate the yam-changing plate 40 to reciprocate between a normal position (shown
in Fig.4A) and an external position (shown in Fig.5C). The first portion further comprises:
a first elastic element 43 and a second elastic element 44; one end of the first elastic
element 43 is fixed to the sideboard 24, and the other end supports the first connecting
rod 41 from the bottom side of the head end of the first connecting rod 41. As shown
in Fig.5A, when the trigger 21 shifts to the enable position, the upward pressing
force of the first elastic element 43 will push the head end of the first connecting
rod 42 upward, and the first safety lever 22 will also move to the unlock position
simultaneously, so that the forward-stroke protuberance 410 of the first connecting
rod 41 rises above the sideboard 24 to a standby position. The second elastic element
44 supports the yarn-changing plate 40 from the bottom side of the yam-changing plate
40 in order to complement the first elastic element 43 and provide elastic force for
the yam-changing plate 40.
[0016] The tail end of the movable blade 50 is coupled to the tail end of the driving link
51. The upper side of the central portion of the driving link 51 has a protuberance
512, which contacts the bottom side of the second safety lever 23 normally. Both sides
of the head end of the driving link 51 separately have an upward forward-stroke protuberance
510 and a downward backward-stroke protuberance 511 in order to actuate the movable
blade 50 to reciprocate between a normal holding position (shown in Fig.4B) and an
external release position (shown in Fig.5D). The second portion further comprises
a third elastic element 52; one end of the third elastic element 52 is fixed to the
sideboard 24, and the other end supports the driving link 51 from the bottom side
near the head end of the driving link 51. When the trigger 21 shifts to the enable
position (shown in Fig.5B), the upward pushing force of the third elastic element
52 will push the head end of the driving link 51 upward, and the second safety lever
23 will also be moved to the unlock position simultaneously, so that the forward-stroke
protuberance 510 of the driving link 51 rises above the sideboard 24 to the standby
position ready for being pushed out.
[0017] The drive unit further comprises: a first cam set 60, a second cam set 70, and return
cams 80, and as shown in Fig.3, all of them together with the selector 30 are installed
to a mount board 90 and rotate around the knitting portion of the circular knitting
machine synchronously. The first, second cam sets 60, 70 respectively have forward
cams 61, 71 and backward cams 62, 72. The forward cam 61 of the first cam set 60 is
responsible for pushing the yam-changing plate 40 to the external position; the forward
cam 71 of the second cam set 70 is responsible for pushing the movable blade 50 to
the external release position; the backward cam 62 of the first cam set 60 is responsible
for pulling the yam-changing plate 40 back to the normal non-enable position; the
backward cam 72 of the second cam set 70 is responsible for pulling the movable blade
50 for clipping/cutting yarns back to the normal holding position. When in the holding
position, a hook 502 at the front end of the movable blade 50 will clip the tail of
the yam Y to position it between the hook 502 and the sideboard 24.
[0018] The practical operation is to be described below in cooperation with from Fig.5A
to Fig.5H.
[0019] Firstly, as shown in Fig.5A, the control circuit or the central computer controls
a movable element 31 of the selector 30 to move to a triggering position. When the
selector 30 passes nearby the controller 20, the movable element 31, which has reached
the triggering position, will trigger the second nose 214 of the corresponding trigger
21. The second noses 214 of the triggers 21 are respectively at different heights;
therefore, different movable elements 31 of the selector 30 can be used to trigger
different second noses 214 of the corresponding triggers 21 separately, so that the
corresponding triggers 21 move to the enable positions, and then, the first safety
levers 22 move to the unlock positions, so that the forward-stroke protuberance 410
of the first connecting rod 41 rises above the sideboard 24 to the standby position
ready for being pushed in. Simultaneously, as shown in Fig.5B, the forward-stroke
protuberance 510 also rises above the sideboard 24 to the standby position ready for
being pushed out.
[0020] Next, as shown in Fig.5C, the drive unit moves to the yarn-feed unit, and a first
inclined plane 610 of the forward cam 61 of the first cam set 60 touches the forward-stroke
protuberance 410 of the first connecting rod 41 to actuate the first connecting rod
41 and the second connecting rod 42 to push the yam-changing plate 40 to the external
position. Further, as shown in Fig.5D, a first inclined plane 710 of the forward cam
71 of the second cam set 70 touches the forward-stroke protuberance 510 of the driving
link 51 to actuate the movable blade 50 to the external release position.
[0021] As shown in Fig.5E, the return cam 80 moves to the controller 20 again, and the front
inclined plane 801 of the return cam 80 gradually closes to the return nose 212 of
the trigger 21, and the rear plane 802 of the return cam 80 pushes the trigger 21
to the normal lock position to actuate the backward-stroke protuberance 411 of the
first connecting rod 41 to emerge from below the sideboard 24. Simultaneously, as
shown in Fig.5F, the backward-stroke protuberance 511 of the driving link 51 also
emerges from below the sideboard 24.
[0022] Lastly, as shown in Fig.5G, the drive unit moves to the yarn-feed unit again, and
the first inclined plane 620 of the backward cam 62 of the first cam set 60 touches
the backward-stroke protuberance 411 of the first connecting rod 41 to actuate the
first connecting rod 41 and the second connecting rod 42 to pull the yarn-changing
plate 40 back to the normal non-enable position. Further, as shown in Fig.5H, the
first inclined plane 720 of the backward cam 72 of the second cam set 70 also touches
the backward-stroke protuberance 511 of the driving link 51 to actuate the driving
link 51 to pull the movable blade 50 back to the normal holding position; at this
time, the hook 502 at the front end of the movable blade 50 for clipping/cutting yarns
will not only clip the tail of the yam Y to position it between the hook 502 and the
sideboard 24 but also will cut off the yam Y
[0023] The time difference between the action of the backward cam 62 of the first cam set
60 and the action of the backward cam 72 of the second cam set 70, i.e. the time difference
between that the first inclined plane 620 touches the backward-stroke protuberance
411 and that the first inclined plane 720 touches the backward-stroke protuberance
511, can be adjusted according to demand. A practical method is installing the backward
cams 62, 72 separately at cam seats 63, 64; such a design can make an old yam be quickly
withdrawn and cut off when striping (changing a yam) and make the tail of a new yam
be released from the movable blade 50 before the new yam is torn off lest the yam
be torn off and yamlets appear; thereby, fabric quality can be improved.
[0024] A preferred embodiment of the forward cam 71 of the second cam set 70 shown in Fig.3
is a two-stage cam, which further comprises: a static cam 73 and a movable cam 74,
wherein the first inclined plane 710 is positioned at the front end of the static
cam 73, and the movable cam 74 further has a second inclined plane 730. The static
cam 73 and the movable cam 74 are separately positioned at different heights. The
movable cam 74 is fixed to the forward cam 71 with a screw 741, and after the screw
741 is loosened, the relative position of the movable cam 74 and the static cam 73
can be adjusted. The abovementioned forward-stroke protuberances of the multiple driving
links of the yarn-feed unit are also divided into two kinds of forward-stroke protuberances
510, 510a, and the forward-stroke protuberance 510 can be pushed by the first inclined
plane 710 of the static cam 73, and the forward-stroke protuberance 510a can be pushed
by the second inclined plane 730 of the movable cam 74.
[0025] Refer to Fig.6, wherein the present invention is exemplified by a six-color striping
apparatus. Suppose that the old yam is the yam 6 and the new yam is the yam 1 herein;
when the knitting needle moves to the yarn-entering point shown in Fig.6, the movable
cam 74 can be moved forward to advance the timing that the second inclined plane 730
touches the lower one of the forward-stroke protuberance 510a from time t1 to time
t2 shown in Fig.7 lest the old yam be released by the movable blade 50 too late and
the old yam be torn off.
1. A striping apparatus of a circular knitting machine, comprising: a controller (20),
a yarn-feed unit, and a drive unit, wherein
said controller (20) is driven by a selector (30) that rotates around the knitting
portion of said circular knitting machine;
said yarn-feed unit has a first portion and a second portion; said first portion comprising
a yarn-changing plate (40), a first connecting rod (41) and a second connecting rod
(42), and being used to feed a yarn (Y) to a yarn-entering position; and said second
portion comprising a movable blade (50) and a driving link (51), and being used to
clip the tail end of the yarn (Y) in a standby state and to cut off an old yarn when
changing a yarn in order to release said old yarn from fabric and restore said standby
state; and
said drive unit and said selector (30) rotate around the knitting portion of said
circular knitting machine, said drive unit comprising a first cam set (60) and a second
cam set (70), said first cam set (60) and said second cam set (70) further respectively
comprising forward cams (61, 71) and backward cams (62, 72); wherein
said forward cam (61) of said first cam set (60) is responsible for pushing said yarn-changing
plate (40) to an external position;
said forward cam (71) of said second cam set (70) is responsible for pushing said
movable blade (50) to an external release position;
said backward cam (62) of said first cam set (60) is responsible for pulling said
yarn-changing plate (40) back to a normal position; and
said backward cam (72) of said second cam set (70) is responsible for pulling said
movable blade (50) back to a normal holding position;
wherein said yarn-changing plate (40) and said movable blade (50) are separately actuated
by said first cam set (60) and said second cam set (70);
characterized in that both sides of the head end of said first connecting rod (41) respectively have an
upward forward-stroke protuberance (410) and a downward backward-stroke protuberance
(411);
said forward-stroke protuberance (410) is actuated by said forward cam (61) of said
first cam set (60), and said backward-stroke protuberance (411) is actuated by said
backward cam (62) of said first cam set (60); and
the tail end of said second connecting rod (42) is coupled to the tail end of said
yarn-changing plate (40) in order to actuate said yarn-changing plate (40) to reciprocate
between said normal position and said external position.
2. The striping apparatus according to claim 1, wherein the tail end of said movable
blade (50) of said second portion is coupled to the tail end of said driving link
(51); both sides of the head end of said driving link (51) respectively have an upward
forward-stroke protuberance (510) and a downward backward-stroke protuberance (511);
said forward-stroke protuberance (510) is actuated by said forward cam (71) of said
second cam set (70), and said backward-stroke protuberance (511) is actuated by said
backward cam (72) of said second cam set (70); thereby, said movable blade (50) is
actuated to reciprocate between said normal holding position and said external release
position.
3. The striping apparatus according to claim 2, wherein said forward cam (71) of said
second cam set (70) further comprises: a static cam (73) and a movable cam (74); a
first inclined plane (710) is positioned at the front end of said static cam (73),
and said movable cam (74) further has a second inclined plane (730); said static cam
(73) and said movable cam (74) are separately positioned at different heights; said
forward-stroke protuberances (510) of multiple said driving links (51) of said yarn-feed
mit have two kinds of forward-stroke protuberances (510, 510a) at different heights;
the higher one of said forward-stroke protuberances (510, 510a) is pushed by said
first inclined plane (710) of said static cam (73), and the lower one of said forward-stroke
protuberances (510, 510a) is pushed by said second inclined plane (730) of said movable
cam (74).
4. The striping apparatus according to claim 3, wherein said movable cam (74) is fixed
to said forward earn (71) with a screw (741), and after said screw (741) is released,
the relative position of said movable cam (74) and said static cam (73) can be adjusted.
1. Ringel- bzw. Abstreifvorrichtung einer Rundstrickmaschine, umfassend:
eine Steuereinrichtung (20), eine Garn-Zuführeinheit und eine Antriebseinheit, wobei
die Steuereinrichtung (20) von einer Auswahleinrichtung (30) angetrieben wird, die
sich um den Strickabschnitt der Rundstrickmaschine dreht;
die Garn-Zuführeinheit einen ersten Abschnitt und einen zweiten Abschnitt aufweist;
wobei der erste Abschnitt eine Garn-Wechselplatte (40), eine erste Verbindungsstange
(41) und eine zweite Verbindungsstange (42) aufweist und zum Zuführen eines Garns
(Y) zu einer Garn-Eintrittsposition verwendet wird; und wobei der zweite Abschnitt
eine bewegliche Klinge (50) und eine Antriebskulisse (51) aufweist und dazu eingesetzt
wird, um das hintere Ende des Garns (Y) in einem Bereitschaftszustand zu klemmen und
um ein altes bzw. verbrauchtes Garn abzutrennen, wenn das Garn gewechselt wird, um
das alte Garn von dem Gewirk freizugeben und den Bereitschaftszustand wieder einzunchmen;
und
die Antriebseinheit und die Auswahleinrichtung (30) sich um den Strickabschnitt der
Rundstrickmaschine drehen, wobei die Antriebseinheit eine erste Noekenkörpergruppe
(60) und eine zweite Nockenkörpergruppe (70) aufweist, wobei die erste Nockenkörpergruppe
(60) und die zweite Nockenkörpergruppe (70) jeweils Vorschub-Nockenkörper (61, 71)
und Rückschub-Nockenkürper (62, 72) aufweisen, wobei
der Vorschub-Nockenkörper (61) der ersten Nockenkörpergruppe (60) dafür zuständig
ist, um die Gam-Wechselpatte (40) zu einer äußeren Position zu schieben;
der Rückschub-Nockenkörper (71), der zweiten Nockenkörpergruppe (70) dafür zuständig
ist, um die bewegliche Klinge (50) zu einer externen Freigabestellung zu schieben;
der Rückschub-Nockenkörper (62) der ersten Nockenkörpergruppe (60) dafür zuständig
ist, um die Garn-Wechselplatte (40) zurück zu einer Ausgangsstellung zu ziehen; und
der Rückschub-Nockenkörper (72) der zweiten Nockenkörpergruppe (70) dafür zuständig
ist, um die bewegliche Klinge (50) zurück zu einer normalen Haltestellung zu ziehen;
wobei die Garn-Wechselplatte (40) und die bewegliche Klinge (50) jeweils von der ersten
Nockenkörpergruppe (60) bzw. der zweiten Nockenkörpergruppe (70) betätigt wird;
dadurch gekennzeichnet, dass beide Seiten des vorderen Endes bzw. der Stirnseite der ersten Verbindungsstange
(41) jeweils einen aufwärts gerichteten Vorschubtakt-Vorsprung (410) und einen abwärts
gerichteten Rückschubtakt-Vorsprung (411) aufweisen; wobei der Vorschubtakt-Vorsprung
(410) durch den Vorschub-Nockenkörper (61) der ersten Nockenkörpergruppe (60) betätigt
wird und der Rückschubtakt-Vorsprung (411) durch den Rückschub-Nockenkörper (62) der
ersten Nockenkörpergruppe (60) betätigt wird und das hintere Ende der zweiten Verbindungsstange
(42) mit dem hinteren Ende der Garn-Wechselplatte (40) gekoppelt ist, um die Garn-Wechselplatte
(40) zu betätigen, sodass diese sich zwischen der Ausgangsstellung und der externen
Stellung hin- und her bewegt.
2. Ringel- bzw. Abstreifvorrichtung nach Anspruch 1, wobei das hintere Ende der beweglichen
Klinge (50) des zweiten Abschnittes mit dem hinteren Ende der Antriebskulisse (51)
gekoppelt ist; beide Seiten des vorderen Endes bzw. der Stirnseite der Antriebskulisse
(51) jeweils einen aufwärts gerichteten Vorschubtakt-Vorsprung (510) und einen abwärts
gerichteten Rückschubtakt-Vorsprung (511) aufweisen; der Vorschubtakt-Vorsprung (510)
durch den Vorschub-Nockenkörper (71) der zweiten Nockenkörpergruppe (70) betätigt
wird und der Rückschubtakt-Vorsprung (511) durch den Rückschub-Nockenkörper (72) der
zweiten Nockenkörpergruppe (70) betätigt wird; sodass die bewegliche Klinge (50) betätigt
wird und zwischen der normalen Haltestellung und der externen Freigabestellung hin-
und her bewegt wird.
3. Ringel- bzw. Abstreifvorrichtung nach Anspruch 2, wobei der Vorschub-Nockenkörper
(71) der zweiten Nockenkörpergruppe (70) außerdem umfasst: einen ortsfesten Nockenkörper
(73) und einen beweglichen Nockenkörper (74); wobei sich eine erste schräge Ebene
(710) am vorderen Ende des ortsfesten Nockenkörpers (73) befindet und der bewegliche
Nockenkörper (74) außerdem eine zweite schräge Ebene (730) aufweist; wobei der ortsfeste
Nockenkörper (73) und der bewegliche Nockenkörper (74) getrennt zueinander auf unterschiedlichen
Höhen positioniert sind; wobei die Vorschubtakt-Vorsprünge (410) von mehreren Antrichskulissen
(51) der Garn-Zuführeinheit zwei Arten von Vorschubtakt-Vorsprüngen (510, 510a) auf
unterschiedlichen Höhen aufweisen; wobei der höhere der Vorschubtakt-Vorsprünge (510,
510a) von der ersten schrägen Ebene (710) des ortsfesten Nockenkörpers (73) vorgeschoben
wird und wobei der untere der Vorschubtakt-Vorsprünge (510, 510a) von der zweiten
schrägen Ebene (730) des beweglichen Nockenkörpers (74) vorgeschoben wird.
4. Ringel- bzw. Abstreifvorrichtung nach Anspruch 3, wobei der bewegliche Nockenkörper
(74) mittels einer Schraube (741) an dem Vorschub-Nockenkörper (71) befestigt ist
und wobei nach Lösen der Schraube (741) die Relativstellung zwischen dem beweglichen
Nockenkörper (74) und dem ortsfesten Nockenkörper (73) eingestellt werden kann.
1. Dispositif de changement de fils pour métier à tricoter circulaire, comprenant : un
contrôleur (20), une unité de fourniture de fil et une unité d'entraînement, dans
lequel
ledit contrôleur (20) est entraîné par un sélecteur (30) qui tourne autour de la partie
de tricotage dudit métier à tricoter circulaire ;
ladite unité de fourniture de fil possède une première partie et une seconde partie
; ladite première partie comprenant une plaque de changement de fils (40), une première
bielle de liaison (41) et une seconde bielle de liaison (42) et étant utilisée pour
fournir un fil (Y) à une position d'entrée de fil ; et ladite seconde partie comprenant
une lame mobile (50) est une liaison d'entraînement (51), et étant utilisée pour pincer
l'extrémité de queue du fil (Y) dans un état d'attente et pour couper un ancien fil
lors du changement de fil afin de libérer ledit ancien fil du tissu et de rétablir
ledit état d'attente ; et
ladite unité d'entraînement et ledit sélecteur (30) tournent autour de la partie de
tricotage dudit métier à tricoter circulaire, ladite unité d'entraînement comprenant
un premier jeu de cames (60) et un second jeu de cames (70), ledit premier jeu de
cames (60) et ledit second jeu de cames (70) comprenant en outre respectivement des
cames avant (61, 71) et des cames arrière (62, 72) ; dans lequel
ladite came avant (61) dudit premier jeu de cames (60) a pour charge de pousser ladite
plaque de changement de fils (40) vers une position externe ;
ladite came avant (71) dudit second jeu de cames (70) a pour charge de pousser ladite
lame mobile (50) vers une position de sortie externe ;
ladite came arrière (61) dudit premier jeu de cames (60) a pour charge de tirer à
nouveau ladite plaque de changement de fils (40) vers une position normale ; et ladite
came arrière (72) dudit second jeu de cames (70) a pour charge de tirer à nouveau
ladite lame mobile (50) vers une position de maintien normale ;
dans lequel ladite plaque de changement de fils (40) et ladite lame mobile (50) sont
actionnées séparément par ledit premier jeu de cames (60) et ledit second jeu de cames
(70) ;
caractérisé en ce que les deux côtés de l'extrémité de tête de ladite première bielle de liaison (41) ont
respectivement une protubérance à course avant ascendante (410) et une protubérance
à course arrière descendante (411) ;
ladite protubérance à course avant (410) est actionnée par ladite came avant (61)
dudit premier jeu de cames (60) et ladite protubérance à course arrière (411) est
actionnée par ladite came arrière (62) dudit premier jeu de cames (60) ; et
l'extrémité de queue de ladite seconde bielle de liaison (42) est couplée à l'extrémité
de queue de ladite plaque de changement de fils (40) afin d'actionner ladite plaque
de changement de fils (40) pour effectuer un mouvement de va-et-vient entre ladite
position normale et ladite position externe.
2. Dispositif de changement de fils selon la revendication 1, dans lequel l'extrémité
de queue de ladite lame mobile (50) de ladite seconde partie est couplée à l'extrémité
de queue de ladite liaison d'entraînement (51) ; les deux côtés de l'extrémité de
tête de ladite liaison d'entraînement (51) ont respectivement une protubérances à
course avant ascendante (510) et une protubérance à course arrière descendante (511)
; ladite protubérances à course avant (510) est actionnée par ladite came avant (71)
dudit second jeu de cames (70) et ladite protubérance à course arrière (511) est actionnée
par ladite came arrière (72) dudit second jeu de cames (70) ; ainsi, ladite lame mobile
(50) est actionnée pour effectuer un mouvement de va-et-vient entre ladite position
de maintien normale et ladite position de sortie externe.
3. Dispositif de changement de fils selon la revendication 2, dans lequel ladite came
avant (71) dudit second jeu de cames (70) comprend en outre : une came statique (73)
et une came mobile (74) ; un premier plan incliné (710) est positionné à l'extrémité
avant de ladite came statique (73) et ladite came mobile (74) possède en outre un
second plan incliné (730) ; ladite came statique (73) et ladite came mobile (74) sont
positionnées séparément à différentes hauteurs ; lesdites protubérances à course avant
(510) desdites liaisons d'entraînement multiples (51) de ladite unité de fourniture
de fil possèdent deux sortes de protubérances à course avant (510, 510a) à différentes
hauteurs ; la plus haute desdites protubérances à course avant (510, 510a) est poussée
par ledit premier plan incliné (710) de ladite came statique (73) et la plus basse
desdites protubérances à course avant (510, 510a) est poussée par ledit second plan
incliné (730) de ladite came mobile (74).
4. Dispositif de changement de fils selon la revendication 3, dans lequel ladite came
mobile (74) est fixée sur ladite came avant (71) avec une vis (741) et une fois que
ladite vis (741) est retirée, la position relative de ladite came mobile (74) et de
ladite came statique (73) peut être ajustée.