KR100666653B1 - A striping apparatus of a circular knitting machine - Google Patents

Abstract

A stripping apparatus of a circular knitting machine is provided to prevent the generation of the yarnlet, thereby enhancing the quality of the cloth. A controller(20) is driven by a selector(30). The selector is rotated toward the circumference of a knitting member of the circular knitting machine. The selector includes plural movable elements(31) normally driven and performs a function similar to a cam. The movable elements are moved to a trigger position under the control of a control circuit or a central computer. When the selector is passed through in the neighborhood of the controller, the movable element drives a trigger device(21) corresponding to the controller. The controller includes the trigger device and the first and second safety levers(22,23).

Description

Striping machine of circular knitting machine {A STRIPING APPARATUS OF A CIRCULAR KNITTING MACHINE}

1A-1D are schematic views showing the structure of a conventional stripping apparatus and the operation of a yarn change plate and a movable blade.

Fig. 2 is a schematic diagram showing a preferred embodiment of the stripping apparatus of the present invention.

3 is a schematic view showing a preferred embodiment of the drive unit of the present invention.

4A is a schematic diagram showing a first portion of a yarn supply unit in a normal position.

4B is a schematic diagram showing a second portion of the yarn supply unit in the normal holding position.

5A, 5C, 5E and 5G are schematic views showing the continuous operation steps of the yarn changing plate of the stripping device of the present invention.

Figures 5B, 5D, 5F and 5H are schematic views showing the successive stages of operation of the movable blade of the stripping apparatus of the present invention.

Figure 6 is a schematic diagram showing the relative position of the yarn inlet point of the previous yarn, new yarn and knitted needle when the yarn is changed.

Fig. 7 is a schematic diagram showing a preferred embodiment of the front cam of the second cam set of the present invention.

<Explanation of symbols for the main parts of the drawings>

20: controller

21: stimulation device

22: first safety lever

23: second safety lever

24: side board

30: selector

31: movable elements

The present invention relates to a stripping apparatus of a knitting machine, and more particularly, to a stripping apparatus of a circular knitting machine.

There is a stripe knitting device technology of circular knitting machines well known to people, for example, "striping device for circular knitting machines" of US Pat. No. 6655176 and "striping system for circular knitting machines" of US Pat. They each disclose a stripping device that feeds different yarns into the knitting needles of a knitting machine. In addition, US Pat. No. 5218845, "Circular Knitting Machine Striping Device Control System," discloses a controller for striping device.

As shown in FIGS. 1A-1D, the above-described stripe device structure of U. S. Patent No. 5218845 describes the yarn change plate 10, movable blade 11 and yarn change plate 10, and movable blade 11. FIG. It includes a drive element (not shown) used to drive the. In the normal state, the yarn-changing plate 10 is not operated in the normal position, the movable blade 11 is retracted to the body 12, and the hook 110 is the body ( Secure the yarn to the position of the front edge 120 of 12). As shown in Fig. 1B, when the machine starts to feed the yarn, the drive element pushes the yarn change plate 10 and the front end of the yarn change plate 10 comes outward. At the same time, the rear end 101 of the yarn changer plate 10 contacts the first pin 111 of the movable blade 11 so that the yarn changer plate 10 reaches the outer yarn feed position to move the blade ( The movable blade 11 is driven to the left side of FIG. 1C until the hook 110 of 11) releases the yarn Y as shown in FIG. 1C. Of course, before the hook 110 releases the yarn Y, the yarn change plate 10 has transferred the yarn Y to the yarn feed position, and the knitting needle 13 has a yarn Y to effect the knitting operation. Secure the hook.

Recently, when attempting to change the yarn, the yarn change plate 10, which has already reached the outer yarn feed position, is pulled to the normal position by the drive element as shown in Fig. 1A. During the process in which the yarn change plate 10 is moved to the right in FIG. 1D, the nose 102 of the yarn change plate 10 is in contact with the second pin 112 of the movable blade 11 in its normal position. The movable blade 11 is moved to the right and the rear of the hook 11, and the hook 110 of the movable blade 11 cuts the yarn Y to the yarn Y at the front edge 120 of the body 12. Secure the tail of the car.

In general, such a stripping device can provide a plurality of different colored yarns. For example, the four-color stripe device has four sets of parallel-arranged yarn change plates 10 and movable blades 11 to change four kinds of yarns, respectively, and the same is true for the six-color stripe device. The greater the number of yarns, the larger the width of the stripping device. In the stripping apparatus disclosed in US Patent No. 5218845 described above, when the movable blade 11 is driven by the yarn changing plate 10, the yarn changing plate 10 is second pin of the movable blade 11. The timing of contacting 112 is later than the timing at which the drive element begins to push the yarn change plate 10 towards the normal position. With this structure in which both the yarn change plate 10 and the movable blade 11 are driven by the same drive element, the timing at which the movable blade 11 cuts the yarn Y is delayed. In such a structure in which both the yarn change plate 10 and the movable blade 11 are driven by the same drive element, the two yarns are operated if the previous yarn and the new yarn, ie the yarns 1 and 6, are further spaced apart. The time difference between them is increased due to the larger separation therebetween, and the timing of releasing the yarn Y is too late, so that the yarn ruptures when the tail of the yarn is still fixed by the movable blade 11, FIG. The fabric quality is degraded because the yarnn Y1 is still held, as shown at, and then the yarnn Y1 is released and entangled with the fabric.

It is a main object of the present invention to provide a stripping device of a circular knitting machine for preventing the occurrence of soyan to improve fabric quality.

According to one embodiment of the invention, different cams are used separately to drive the yarn changing plate and the movable blade, and even if the new yarn and the previous yarn are further spaced apart, the old yarn is quickly retracted and cut, The timing of the cam can be adjusted to release the tail of the new yarn from the movable blade prior to rupture. Therefore, the present invention can prevent the yarn from breaking so that no yarn is generated, so that the fabric quality can be improved.

The technical features and preferred embodiments of the present invention will be described in detail below with reference to the drawings.

Reference is made to FIG. 2. According to one preferred embodiment, the stripping device of the circular knitting machine of the present invention includes a controller 20, a yarn supply 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 having a plurality of movable elements 31 that are normally inoperative and functioning like a cam. Under the control of a control circuit or a central computer, the movable element 31 can be moved to a trigger position. When the selector 30 passes near the controller 20, the movable element 31 in the magnetic pole position actuates the corresponding magnetic pole device 21 of the controller 20 to be moved to the operating position.

The controller 20 further includes a stimulation device 21, a first safety lever 22 and a second safety lever 23. One end of the first safety lever 22 and one end of the second safety lever 23 are installed on the side board 24 by the first pivot 221. Stimulus device 21 has a first end 210 and a second end 211. The first end 210 of the stimulation device 21 has a protruding return nose 212. The portion between the first end 210 and the second end 211 has a second pivot axis 213, and the stimulation device 21 is installed on the side board 24 by the second pivot axis 213. do. The second end 211 of the stimulation device 21 also has a protruding second nose 214. Reference is made to FIGS. 4A and 4B. In the steady state, the stimulation device 21, the first safety lever 22 and the second safety lever 23 are all in a fixed position. The second end 211 of the stimulation device 21 exerts pressure on the first safety lever 22 and the second safety lever 23. When the first end 210 of the stimulation device 21 is moved by an external force, it is rotated around the second pivot 213 to an operating position, and the second end 211 of the stimulation device 21 is firstly moved. The notch 220 on the upper side of the lever 22 and the notch 230 on the upper side of the second lever 23 are slid, and the first lever 22 and the second lever 23 are directed toward the unlocked position. Make a turn around the first pivot 221. The overall controller 20 comprises a plurality of units, each unit being formed of one stimulation device 21, one first safety lever 22 and one second safety lever 23. These units are arranged in parallel into the overall controller 20. In the steady state, the relationship between the stimulation device 21 and the first safety lever 22 of the same unit is shown in Fig. 4A, and the relationship between the stimulation device 21 and the second safety lever 23 of the same unit is 4b is shown.

The yarn feed unit is fixedly installed on the perimeter of the circular knitting machine and consists of two parts. The first portion further comprises a yarn change plate 40, a first connecting rod 41 and a second connecting rod 42. The first part functions to feed the yarn Y to the yarn inlet position. The second portion further includes a movable blade 50 and a drive link 51. Since the second part functions to cut the previous yarn by fixing the tail of the yarn Y in the standby state, the previous yarn can be released from the fabric and the operation can recover the standby state. The above-described controller 20 is fixedly installed on the yarn supply unit, and preferred embodiments thereof are described below.

The yarn change plate 40, the first connecting rod 41 and the second connecting rod 42 of the first portion interconnect the heads to the tails to form a kind of three bar connections. A plurality of different colored yarns Y pass separately through another yarn guide ring 25 and through the through hole 401 at the front end of the yarn changing plate 40. In the steady 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 rod 42. The upper side of the central portion of the first connecting rod 41 has a protrusion 412, and the protrusion 412 normally contacts the bottom side of the first safety lever 22. The upper side of the head end of the first connecting rod 41 has an upward front stroke protrusion 410, and the bottom side of the head end of the first connecting rod 41 has a downward rear stroke protrusion 411. Equipped. The tail end of the second connecting rod 42 is coupled to the tail end of the yarn change plate 40. The second connecting rod 42 transmits the pulling force of the first connecting rod 41 to the yarn change plate 40 to deform the pulling operation of the first connecting rod 41 into the motion in the other direction. It functions to operate the yarn change plate 40 to reciprocate between the normal position (shown in FIG. 4) and the outer position (shown in FIG. 5C). The first portion further includes a first elastic element 43 and a second elastic element 44. One end of the first elastic element 43 is fixed to the side board 24, the other end supporting 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 stimulation device 21 is moved to the operating position, the upward pressing force of the first elastic element 43 presses the head end of the first connecting rod 41 upward, and the first safety The lever 22 is also moved to the unlocked position at the same time so that the front stroke projection 410 of the first connecting rod 41 rises above the side board 24 to the standby position. The second elastic element 44 complements the first elastic element 43 by supporting the yarn change plate 40 from the bottom side of the yarn change plate 40 to provide an elastic force for the yarn change plate 40.

The tail end of the movable blade 50 is coupled to the tail end of the drive link 51. The upper side of the central portion of the drive link 51 has a protrusion 512 which normally contacts the bottom side of the second safety lever 23. Both sides of the head end of the drive link 51 are provided with an upward front stroke protrusion 510 and a downward rear stroke protrusion 511 separately to hold a normal holding position (shown in Fig. 4B) and an external release position (Fig. 4B). Operate the movable blade 50 to reciprocate (shown in 5d). The second portion further includes a third elastic element 52. One end of the third elastic element 52 is fixed to the side board 24, and the other side supports the drive link 51 from the bottom side near the head end of the drive link 51. When the stimulation device 21 is moved to the operating position (shown in FIG. 5B), the upward pressing force of the third elastic element 52 presses the head end of the drive link 51 upwards, and the second safety lever ( 23 is also moved to the unlocked position at the same time so that the front stroke projection 510 of the drive link 51 ascends to the standby position over the side board 24 ready to be pushed out.

The drive unit further includes a first cam set 60, a second cam set 70, and a return cam 80, as shown in FIG. 3, all of which are mounted board 90 together with the selector 30. ) Is rotated synchronously around the knitting part of the circular knitting machine. The first and second cam sets 60, 70 have front cams 61, 71 and rear cams 62, 72, respectively. The front cam 61 of the first cam set 60 serves to press the yarn change plate 40 to an external position. The front cam 71 of the second cam set 70 serves to push the movable blade 50 to the external release position. The rear cam 62 of the first cam set 60 serves to pull the yarn change plate 40 to the normal inoperative position. The rear cam 72 of the second cam set 70 serves to pull the movable blade 50 for fixing / cutting the yarn to the normal holding position. When in the holding position, the hook 502 at the front end of the movable blade 50 secures the tail of the yarn Y to position it between the hook 502 and the side board 24.

Actual operation is described below with reference to Figs. 5A to 5H.

First, as shown in Fig. 5A, the control circuit or the central computer controls the movable element 31 of the selector 30 to be moved to a triggering position. When the selector 30 passes near the controller 20, the movable element 31 reached the magnetic pole position stimulates the second nose 214 of the corresponding magnetic pole device 21. The second noses 214 of the stimulation device 21 are each at different heights. Thus, the different movable elements 31 of the selector 30 can be used separately to stimulate different second noses 214 of the corresponding stimulation device 21, so that the corresponding stimulation device 21 moves to the operating position. Then, the first safety lever 22 is moved to the unlocked position so that the front stroke protrusion 410 of the first connecting rod 41 is raised above the side board 24 to the ready position to be pushed out. do. At the same time, as shown in Fig. 5B, the front stroke protrusion 510 is also raised above the side board 24 to the standby position ready to be pushed out.

Next, as shown in FIG. 5C, the drive unit is moved to the yarn supply unit, and the first inclined plane 610 of the front cam 61 of the first cam set 60 is connected to the first connecting rod ( The yarn change plate 40 is pushed to an external position by operating the first connecting rod 41 and the second connecting rod 42 in contact with the front stroke protrusion 410 of 41. Also, as shown in FIG. 5D, the first inclined surface 710 of the front cam 71 of the second cam set 70 contacts the front stroke protrusion 510 of the drive link 51 to move the blade ( Operate 50) to the external release position.

As shown in FIG. 5E, the return cam 80 is moved back to the controller 20, and the front inclined surface 801 of the return cam 80 gradually closes to the return nose 212 of the stimulation device 21. The rear plane 802 of the return cam 80 actuates the rear stroke projection 411 of the first connecting rod 41 to push the stimulation device 21 to its normal fixed position and emerge from below the side board 24. do. At the same time, as shown in FIG. 5F, the rear stroke protrusion 511 of the drive link 51 also appears from below the side board 24.

Finally, as shown in FIG. 5G, the drive unit is moved back to the yarn supply unit, and the first inclined surface 620 of the rear cam 62 of the first cam set 60 is connected to the first connecting rod 41. The yarn change plate 40 is pulled to the normal non-operation position by operating the first connecting rod 41 and the second connecting rod 42 in contact with the rear stroke protrusion 411. In addition, as shown in FIG. 5H, the first inclined surface 720 of the rear cam 72 of the second cam set 70 contacts the rear stroke protrusion 511 of the drive link 51 to move the blade ( Operate drive link 51 to pull 50) to the normal holding position. At this time, the hook 502 of the front end of the movable blade 50 for fixing / cutting the yarn secures the tail of the yarn Y and positions it between the hook 502 and the side board 24. But not the yarn (Y).

The time difference between the operation of the rear cam 62 of the first cam set 60 and the operation of the rear cam 72 of the second cam set 70, that is, the first inclined surface 620 is the rear stroke projection 411. The time difference between contacting and the first inclined surface 720 in contact with the rear stroke protrusion 511 may be adjusted as desired. The actual method is to install the rear cams 62, 72 separately on the cam seats 63, 64. This structure allows the previous yarn to retreat quickly and cut when streaking (yarn change), and the tail of the new yarn from the movable blade 50 before the new yarn is ruptured so that the yarn does not burst and soyan is not generated. To be released. Thus, the fabric quality can be improved.

The preferred embodiment of the front cam 71 of the second cam set 70 shown in FIG. 3 further comprises a stationary cam 73 and a movable cam 74, the first inclined plane 710 being fixed. Positioned at the front end of the cam 73 and the movable cam 74 is a two-stage cam further comprising a second inclined surface 730. The fixed cam 73 and the movable cam 74 are positioned separately at different heights. The movable cam 74 is fixed to the front cam 71 by the screw 741, and after the screw 741 is loosened, the relative position of the movable cam 74 and the fixed cam 73 can be adjusted. have. The above-mentioned front stroke protrusion of the plurality of drive links of the yarn feeding unit is also separated into two kinds of front stroke protrusions 510 and 510a, and the front stroke protrusion 510 is the first inclined surface 710 of the fixed cam 73. ), And the front stroke protrusion 510a may be pushed by the second inclined surface 730 of the movable cam 74.

Referring to Fig. 6, a six-color stripe inserting device according to the present invention is illustrated. Assume the previous yarn as yarn (6) and the new yarn as yarn (1). When the knitted needle is moved to the yarn inlet position shown in Fig. 6, the movable cam 74 is moved forward, so that the previous yarn is released by the movable blade 50 too late so that the previous yarn does not burst, The timing at which the inclined surface 730 contacts the rear protrusion 511 is advanced from the timing t1 to the timing t2 as shown in FIG.

The present invention uses different cams separately to drive the yarn changing plate and the movable blade, and even if the new yarn and the previous yarn are further spaced apart, the old yarn is quickly retracted and cut and the new yarn is broken before rupture. The timing of the cam can be adjusted to release the tail from the movable blade. Therefore, the present invention can prevent the yarn from being ruptured so that no yarn is generated, so that the quality of the fabric is improved.

Claims (5)

In the stripping apparatus of the circular knitting machine, The stripping device of the circular knitting machine includes a controller, a yarn feeding unit and a driving unit, which is driven by a selector rotating around the knitting portion of the circular knitting machine, The yarn feeding unit has two portions, the first portion further comprising a yarn-changing plate, a first connecting rod and a second connecting rod and configured to feed the yarn Y into the yarn inlet position. Wherein the second portion further comprises a movable blade and a drive link and is used to fix the tail end of the yarn Y in the standby state and to cut the previous yarn when changing the yarn so that the previous yarn is released from the fabric and the Will return to standby, The drive unit and the selector are rotated around the knitting portion of the circular knitting machine, the drive unit further comprising a first cam set and a second cam set, wherein the yarn change plate and the movable blade Separately operated by the first cam set and the second cam set, the first cam set and the second cam set further comprise a front cam and a rear cam, respectively, wherein the front cam of the first cam set Pushes the yarn change plate to an outer position, a front cam of the second cam set pushes the movable blade to an outer release position, and a rear cam of the first cam set turns the yarn Pull the plate to the normal position, and the rear cam of the second cam set pulls the movable blade to the normal holding position. Striping device of circular knitting machine made with. The method according to claim 1, wherein both sides of the head end of the first connecting rod has an upward front stroke projection and a downward rear stroke projection, respectively, the front stroke projection is operated by the front cam of the first cam set, The rear stroke projection is actuated by the rear cam of the first cam set, and the tail end of the second connecting rod is coupled to the tail end of the yarn changing plate to reciprocate between the normal position and the outer position. Striping device of the circular knitting machine, characterized in that for operating the yarn changing plate. The tail end of the movable blade of the second portion is coupled to the tail end of the drive link, wherein both sides of the head end of the drive link have an upward front stroke protrusion and a downward rear stroke protrusion, respectively. And the front stroke protrusion is operated by the front cam of the second cam set, and the rear stroke protrusion is operated by the rear cam of the second cam set, so that the movable blade is connected to the normal holding position. Striping device of the circular knitting machine, characterized in that it is operated to reciprocate between the outer release position. The method of claim 1, wherein the front cam of the second cam set further comprises a fixed cam and a movable cam, the first inclined surface is positioned at the front end of the fixed cam, the movable cam is a second inclined surface The fixed cam and the movable cam are further positioned at different heights, and the front stroke protrusions of the plurality of the drive links of the yarn supply unit have two kinds of front stroke protrusions at different heights. A higher one of the front stroke projections is pushed by the first inclined surface of the stationary cam and a lower one of the front stroke projections is pushed by the second inclined surface of the movable cam. Striping device of circular knitting machine made with. The circular knitting machine according to claim 4, wherein the movable cam is fixed to the front cam by a screw, and after the screw is released, the relative position of the movable cam and the fixed cam can be adjusted. Striping device.

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