CIRCULAR KNITTING MACHINE FOR ORGANIZING TEXTILES WITH OPERATING CAM OF CARTRIDGE TYPE [Technical Field]

<i> The present invention relates to a circular knitting machine for knitting textiles, and more particularly to a circular knitting machine for knitting textiles which is capable of producing various patterns and of fabricating various textiles whose forms are stable at lower costs, as pile formation of pile type textiles is controlled, using an operating cam of cartridge type, which can be easily mounted and separated thereon/therefrom. [Background Art]

<2> A velour textile having good thermal insulation and soft property, which is one of pile type textiles of the prior art, is fabricated by a circular knitting machine or Jacquard machine. In general, the circular knitting machine can produce cost effective products since the circular knitting machine has a rapid operating speed, compared with the Jacquard machine. On the other hand, the Jacquard machine has disadvantages such that it cannot knit textile for suits, because velour textiles fabricated by the Jacquard machine lacks handfeel or stiffness thereof.

<3> The prior art pile type textiles fabricated by a circular knitting machine are produced by as circular kitting device, which produces knitted fabric as a single knitting cam, a sinker by the single knitting cam, and a knitted needle operate.

<4> Fig. 1 is a perspective view illustrating a structure of a circular knitting machine for knitting non-Jacquard type textiles, according to the prior art. The circular knitting machine includes a cylinder shaped as a doughnut, a circular knitting device 100 connected to one side of the cylinder, kitting fiber providing members 84 and 85 for providing knitting fibers to the circular knitting device 100, a frame 80 for supporting the knitting fiber providing members, a receiving member 60 for receiving knitted

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textiles 200, and a supporter 50. The circular knitting device 100 includes a knitted needle 5 and a sinker 4, which rotate together with the cylinder, and a single knitting cam and a sinker cam, which guide up/down and forward/backward motions of the knitted needle and the sinker. The respective knitted needle 5 and the sinker 4 have buts which are inserted into concave parts (grooves) of the respective knitting cam and the sinker cam. As the knitted needle 5 and the sinker 4 rotate together with the cylinder and simultaneously perform up/down and forward/backward motions, knitting operation can be rapidly performed to form a fiber knit and a fiber pile.

<5> However, when the prior art circular knitting machine variously knits a pile to express a strap pattern, rectangular or diamond pattern, etc., loops come out from the rear side of the knitted fabric such that the original cloth cannot be even. Furthermore, the rear side of the knitted fabric is weakended such that duration of the textile can be reduced. Most of the prior art velour textiles uniformly have formed a pile all over the entire surface thereof. Therefore, when knitted fabric is changed in its appearance, grey patterns must have been uniformed.

<6> Recently, to comply with consumer's desire and produce high value-added original cloth, those who skilled in the art have recognized that knit of velour textiles must be changed to produce various patterns. However, an original cloth with any specific designs has not been developed. Also, the prior art circular knitting machine for knitting velour textiles has not been improved, such that it can knit a knitted fabric with new designs.

<7> In addition, when a small amount of textiles with various patterns is produced, since circular knitting machines must be newly manufactured according to each of the patterns, the prior art textile production method requires much costs. Therefore, it needs a new circular knitting machine that can reduce textile knit costs and can rapidly knit various patterns. [Disclosure] [Technical Probleml

<8> Therefore, the present invention has been made in view of the above problems, and it is an object of the present invention to provide a circular knitting machine for knitting textiles with an operating cam of cartridge type, which is capable of knitting various patterns and guiding various types of sinkers.

<9> It is another object of the present invention to provide a circular knitting machine for knitting textiles with an operating cam of cartridge type, which is capable of rapidly and easily being mounted and separated thereon/therefrom, such that a small amount of textiles of various pile types, which has various patterns can be produced at relatively low costs.

<io> It is further another object of the present invention to provide a circular knitting machine for knitting textiles with an operating cam of cartridge type, which is capable of performing knit such that knit cloth cannot have extension difference thereof lengthwise and crosswise, because a Jacquard fashion is not adopted to give the textile stiffness, which is called handfeel, to be cut as formal dress, and of arbitrarily controlling advance degree of a sinker to form various piles, such that 2,000 kinds of patterns, such as a diamond pattern, a check pattern, etc., can be produced.

<π> It is yet another object of the present invention to provide a circular knitting machine for knitting textiles with an operating cam of cartridge type, which is capable of knitting slant line patterns as knit cams are composed in plural stages, and of easily and precisely controlling intervals of movement paths of an knitted needle, such that stitch can be evenly formed therein. [Technical Solution]

<i2> In accordance with an aspect of the present invention, the above and other objects can be accomplished by the provision of a circular knitting machine for knitting textiles including a cylinder 2 which is rotatable, a cylinder ring 2a located around circumference of upper part of the cylinder 2, a plurality of knitted needles performing up/down movements side the cylinder 2, a plurality of sinkers performing forward/backward movements on

the cylinder ring 2a, a knitted cam guiding the plurality of knitted cams side the cylinder 2, and a sinker cam 3 guiding forward/backward movements of the sinkers, in which the sinker cam 3 is mounted on a sinker ring 7 arranged on the upper part of the cylinder ring 2a. Here, the plurality of knitted needles have needle buts whose locations are different from each other to be properly operated with the knitted cam and perform up/down movements, respectively. Here, the sinker ring 7 includes an operating cam 15 of cartridge type which guides respective forward/backward movements of the plurality of sinkers. Here, the plurality of sinkers 4-1, 4-2, 4-3, and 4-4 include main-sinker buts 4m, respectively, and control-sinker buts 4a, 4b, 4c and 4d whose locations are different from each other, whereby forward/backward movements can be performed, associating with the operating cam 15 of cartridge type, which is mounted on the sinker ring 7 together with the sinker cam 3.

<i3> Preferably, the operating cam 15 of cartridge type includes: concave parts 15a, 15b, 15c and 15d through which the respective control-sinker buts 4a, 4b, 4c and 4d of the plurality of sinkers pass! and convex partslθa, 16b, 16c, 16d and 16e performing guide through sides of the respective control- sinker buts of the plurality of sinkers.

<i4> Preferably, the operating cam 15 of cartridge type includes a first coupling hole 8 of at least one to form an operating cam assembly 11 which is configured such that an upper plate 11a is mounted and separated on/from a first coupling member 13, in which he upper plate has a second coupling hole 12 corresponding to the first coupling hole.

<15> Preferably, the upper plate Ha of the operating cam assembly 11 includes a third coupling hole 14a of at least one, and the sinker ring 7 includes a fourth coupling hole 14b corresponding to the third coupling hole 14a, and an operating cam box 10 formed to include the operating cam assembly 11 through a second coupling member 14, such that the operating cam assembly 11 can be mounted and separated on/from the sinker ring 7.

<i6> Preferably, the operating cam assembly 11 further includes a handle 9

on the upper plate 11a such that the operating cam assembly 11 can be easily mounted and separated on/from a plurality of operating cams box 10 included in the sinker ring 7. <17> Preferably, the knitted cams are mounted knitted cam boxes 6, in which the knitted cam boxes include two to four up/down stages such that they can be separatedly mounted and operated, respectively, and the knitted cams 6a,

6b, 6c and 6d are arranged to easily adjust height of stitches 5a, 5b, 5c and

5d though adjustment of interval D between the upper knitted cam and the lower knitted cam. <i8> Preferably, the knitted cams include at least two of a knit cam 6a, a stitch cam 6b, a miss cam 6c, and a turk cam 6d.

[Description of Drawings] <i9> The above and other objects, features and other advantages of the present invention will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which: <20> Fig. 1 is a perspective view illustrating a structure of a circular knitting machine for knitting non-Jacquard type textiles, according to the prior art; <2i> Fig. 2 is a cross-sectional view of a circular knitting device of a circular knitting machine for knitting textiles according to the present invention; <22> Fig. 3 is a perspective view illustrating a installation structure of an knit cam of a circular knitting machine for knitting textiles according to the present invention; <23> Fig. 4 is a cross-sectional view for describing operation relation between an knit cam and an knitted needle in a circular knitting machine for knitting textiles according to the present invention; <24> Fig. 5 is a perspective view illustrating an entire structure of a sinker ring of a circular knitting machine for knitting textiles according to the present invention; <25> Fig. 6 is a perspective view illustrating an operating cam assembly of

a circular knitting machine for knitting textiles according to the present invention;

<26> Fig.7 is a cross-sectional view along with line A-A of Fig.6;

<27> Fig. 8 is a partially exploded perspective view illustrating a structure of an operating cam assembly included in a sinker ring of a circular knitting machine for knitting textiles according to the present invention;

<28> Fig.9 is an exploded perspective view illustrating a sinker cam and an operating cam assembly each of which is installed to the sinker ring of Fig. 8;

<29> Fig. 1OA to Fig. 1OD are front views illustrating a structure of sinkers employed in a circular knitting machine for knitting textiles according to the present invention;

<30> Fig. 11 is a view illustrating alignment of operating cams of various cartridge types and a sinker cam, in a circular knitting machine for knitting textiles according to the present invention; and

<3i> Fig. 12 to Fig. 16 are rear views illustrating embodiments of operating cams of cartridge type, which are concave parts and convex parts which are various patterns, in a circular knitting machine for knitting textiles. [Best Mode]

<32> Now, a circular knitting machine for knitting textiles according to preferred embodiments of the present invention will be described in detail with reference to the annexed drawings. In the drawings, the same or similar elements are denoted by the same reference numerals even though they are depicted in different drawings. In the following description, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. Also, the terms used in the following description are terms defined taking into consideration the functions obtained in accordance with the present invention.

<33> Fig.2 is a cross-sectional view of a circular knitting device 100 of a

circular knitting machine 1 for knitting textiles according to the present invention. The circular knitting device 100 of the circular knitting machine 1 includes a cylinder 2 shaped as a cylindricalIy ring body, which rotates in the horizontal plane with respect to an axis at the center thereof and provides movement passages of a plurality of knitted needles 5a, 5b, 5c and 5d thereto; a cylinder ring 2a which is shaped as a circle (or a doughnut) and located at the outer circumference of the highest part of the cylinder 2; the plurality of knitted needles 5a, 5b, 5c and 5d; and sinkers 4. Here, the cylinder ring 2a is configured such that it can be rotated in the same direction within the horizontal plane, associated with rotation of the cylinder 2. Also, the sinkers 4 are configured on the upper side of a sinker ring 7, such that they can perform forward and backward movements with respect to the axis direction thereof through a plurality of grooves. Especially, the circular knitting machine for knitting textiles according to the present invention installs a plurality of sinkers 4-1, 4-2, 4-3 and 4-4 whose forward and backward movements are different from each other.

<34> The cylinder ring 2a arranges a sinker cam 3 and an operating cam 8 thereon, which guide movements of the sinkers 4-1, 4-2, 4-3, and 4-4. The sinkers 4-1, 4-2, 4-3, and 4-4 includes a main sinker but 4m and control sinker buts 4a, 4b, 4c and 4d on the upper portions thereof to perform differently forward/backward movements. The sinker cam 3 and the operating cam 8 are installed to the sinker ring 7 whose shape is formed like an approximate circle (or a doughnut), or correspondingly formed like the shape of the cylinder ring 2a, which will be described later.

<35> The cylinder 2 forms a plurality of vertical grooves on the outer circumference thereof. A plurality of knitted needles 5a, 5b, 5c and 5d are arranged along each vertical groove. The plurality of knitted needles 5a, 5b, 5c and 5d are placed at the vertical grooves, respectively, and moved up/down along the axes of the vertical grooves.

<36> Fig. 3 is a perspective view illustrating a installation structure of an knit cam of a circular knitting machine for knitting textiles according to

the present invention. Fig. 4 is a cross-sectional view for describing operation relation between an knit cam and a knitted needle in a circular knitting machine for knitting textiles according to the present invention.

<37> The outer circumference of the cylinder 2 is surrounded by knitted cam boxes 6 each of which is shaped as a ring. Fig. 3 illustrates one of the knitted cam boxes 6. According to one embodiment according to the present invention, the knitted cam boxes 6 can include slots 19a, 19b and 19c for knitted cam coupling such that they can be arranged in four stages.

<38> In one embodiment according to the present invention, the knitted needles 5a, 5b, 5c and 5d can perform up/down movements to the upper portion of the cylinder 2 as buts 5a', 5b', 5c' and 5d' , which are formed in the knitted needles, respectively, move along passages of the knitted cams which are composed of four stages. For example, as shown in Fig. 4, the knitting cams, such as a knit cam 6a, a stitch cam 6b, a miss cam 6c, a turk cam 6d, etc., are separated and installed to the knitting cam boxes 6 in four stages, according to predetermined patterns, such that the respective cams can separately operate. The knitting cam of stage 1 to stage 4 can be installed therein, spacing apart from each other with a predetermined interval D, considering the slots 19a, 19b and 19c for knitting cam coupling, which are formed in the knitting cam boxes 6.

<39> Therefore, for example, when the cylinder 2 rotates clockwise, the knitting needles 5a, 5b, 5c and 5d also rotate clockwise. On the other hand, according to types of knitting cams, the knitting needles 5a, 5b, 5c and 5d perform up/down movements to form different patterns. Also, stitches can be evenly formed by the knitting cam of four stages and various patterns, such as a slant line pattern, a diamond pattern, etc., can be formed.

<40> Fig. 5 is a perspective view illustrating an entire structure of a sinker ring of a circular knitting machine for knitting textiles according to the present invention.

<4i> The sinker ring 7 is formed as a circle (or a doughnut) like a cylinder ring 2a, and correspondingly arranged on the upper portion of the cylindering

2a. The sinker ring 7 is hollowed to form an operating cam box 10 therein, which includes an operating cam assembly 11, which will be described later. The sinker ring 7 is coupled to a plurality of sinker cams 3 and operating cam assemblies 11. Especially, the sinker ring 7 is coupled to an operating cam 15 of cartridge type which guides forward/backward movements of the plurality of sinkers 4, respectively. The operating cam 15 of cartridge type is included in the operating cam assembly 11. Although the sinker ring 7 in Fig. 5 is implemented to include 36 sinker cams 3 and operating cam assemblies, and operating cam box 10, the those who skilled person in the are easily appreciated that the present invention is not limited by the embodiment.

<42> Fig. 6 is a perspective view illustrating an operating cam assembly 11 of a circular knitting machine for knitting textiles according to the present invention. Fig.7 is a cross-sectional view along with line A-A of Fig.6.

<43> The operating cam assembly 11 is configured such that an operating cam 15 of cartridge type and an upper plate 11a are coupled to each other. The operating cam 15 of cartridge type guides forward/backward movements of the plurality of sinkers 4-1, 4-2, 4-3 and 4-4, respectively. The plurality of sinkers 4-1, 4-2, 4-3 and 4-4 include main-sinker but 4m and control-sinker buts 4a, 4b, 4c and 4d, respectively, and perform forward/backward movements, associating with the operating cam 15 of cartridge type, which is mounted on the sinker ring 7 together with a sinker cam 3. The control-sinker buts 4a, 4b, 4c and 4d, which are included in the plurality of sinkers 4-1, 4-2, 4-3 and 4-4, are arranged at different positions, as shown in Fig. 10.

<44> As shown in Fig. 6, the operating cam 15 of cartridge type forms concave parts 15a, 15b, 15c and 15d and convex parts 16a, 16b, 16c, 16d and 16e. Here, the concave parts are passed by the control-sinker buts 4a, 4b, 4c and 4d of the plurality of sinkers, respectively, and the convex parts 16a, 16b, 16c, 16d and 16e guide the control-sinker buts 4a, 4b, 4c and 4d of the plurality of sinkers, respectively, through the sides thereof.

<45> For example, as the sinker ring 2a is rotated, when the first sinker 4-

1 of Fig. 1OA is passed through the operating cam 15 of cartridge type of Fig. 6, the control-sinker but 4a passes through the concave part 15a between the first convex part 16a and the second convex part 16b. In this case, since the second convex part 16b as shown in Fig. 6 includes a slant part 16', the first sinker 4-1 performs advance movement.

<46> For example, as the sinker ring 2a is rotated, when the second sinker 4-2 of Fig. 1OB is passed through the operating cam 15 of cartridge type of Fig. 6, the control-sinker but 4b passes through the concave part 15b between the second convex part 16b and the third convex 16c. In this case, since the third convex part 16c as shown in Fig. 6 does not include a slant part 16', the second sinker 4-2 performs horizontal movement without advance movement.

<47> For example, as the sinker ring 2a is rotated, when the third sinker 4- 3 and the fourth sinker 4-4 of Fig. 1OC are passed through the operating cam 15 of cartridge type of Fig. 6, the control-sinker but 4c of the third sinker 4-3 passes through the concave part 15c, and the control-sinker but 4d of the fourth sinker 4-4 passes through the concave part 15d. In this case, since the fourth convex part 16d and the fifth convex part 16e as shown in Fig. 6 include a slant part 16', the third sinker 4-3 and the fourth sinker 4-4 performs upper side from the drawing paper and performs advance operation.

<48> Here, since the above-mentioned number and form of the concave parts 15a, 15b, 15c and 15d and the convex parts 16a, 16b, 16c, 16d, and 16e of the operating cam 15 are just introduced to understand the present invention, the number and form can be easily modified from the embodiment by those who skilled person in the art. Therefore, the modified embodiments are also included in the scope of the present invention.

<49> On the other hand, as shown in Fig. 7, the operating cam 15 of cartridge type includes at least one first coupling hole 8. The operating cam 15 of cartridge type is coupled to a upper plate 11a such that the operating cam 15 can be mounted and separated on/from the upper plate 11a, thereby forming an operating cam assembly 11. The upper plate 11a includes a second coupling hole 12 corresponding to the first coupling hole 8, such that

the upper plate 11a is mounted and separated thereon/therefrom by a first coupling member 13, such as a bolt. The first 8 and second coupling holes 12 are implemented with one or more than two. As shown in Fig. 7, the first coupling hole 8 is formed to have a length, such that the spiral part of the first coupling member 13 can coupled thereto. On the other hand, the first coupling hole 8 can be implemented to be bored from the upper part to the lower part.

<50> Fig. 8 is a partially exploded perspective view illustrating a structure of an operating cam assembly included in a sinker ring of a circular knitting machine for knitting textiles according to the present invention. Fig. 9 is an exploded perspective view illustrating a sinker cam and an operating cam assembly each of which is installed to the sinker ring of Fig. 8. Although the sinker ring 7 is arranged on the cylinder ring 2a, the sinker ring 7 does not rotate while the cylinder ring 2a is rotated.

<5i> As shown in Fig. 8 and Fig. 9, the upper plate 11a of the operating cam assembly 11 forms at least one third coupling hole 14a thereon. The sinker ring 7 includes a fourth coupling hole 14b corresponding to the third coupling hole 14a. Therefore, the operating cam assembly 11 and the sinker ring 7 are coupled to each other by the second coupling member 14, such-as a bolt. The sinker ring 7 includes an operating cam box 10 in which the operating cam assembly 11 can be installed. According to one embodiment according to the present invention, as shown in Fig. 9, the operating cam box 10 can be implemented such that the operating cam box 10 is excavated to be similar to the form of the operating cam 15 of cartridge type. The operating cam assembly 11 in Fig. 9 is formed to approximate a pentagon, considering area of the sinker ring 7 and arrangement of the sinker cam 3 and the auxiliary sinker cam 18. Although the operating cam approximate a pentagon in the embodiment according to the present invention, those skilled person in the art can easily appreciated that it can be modified to various shapes, such as an rectangle, or an hexagon.

<52> In addition, the operating cam assembly 11 may further include a handle

(reference number 9 in Fig. 7) in the upper plate 11a, such that the operating cam assembly 11 can be easily mounted and separated on/from a plurality of operating cam boxes 10 which are included in the sinker ring 7.

<53> On the other hand, when the operating cam 8 of cartridge type is replaced with another one to produce other textile pattern, such replacement procedure is performed as follows.

<54> Firstly, the second coupling member 14 is separated from the third and fourth coupling holes 14a and 14b, and then the operating cam assembly 11 is drawn out from the operating cam box 10 (SlO). Afterwards, the first coupling member 13 is separated from the first and second coupling holes 8 and 12 (S20). After the operating cam 15 of cartridge type of the operating cam assembly 11 is separated from the upper plate 11a, another operating cam of cartridge type is installed to the upper plate 11a (S30). After that, as the first coupling member 13 is coupled to the first 8 and second coupling holes 12, the replaced operating cam 15 of cartridge type is coupled to the upper plate 11a to form the operating cam assembly 11 (S40). After the operating cam assembly 11 is installed to the operating cam box 10, the second coupling member 14 is coupled to the second and fourth coupling holes 14a and 14b, such that the operating cam assembly 11 can be coupled to the operating cam box 10.

<55> As such, since the operating cam 15 of cartridge type can be easily replaced with another one, the machine according to the present invention can easily perform change of textile pattern. Therefore, when a small amount of textile with various patterns is produce, costs for such products can be remarkably reduced.

<56> On the other hand, the sinker ring 7 includes a sinker cam 3 such that all of the sinkers 4-1, 4-2, 4-3, and 4-4 can moved between the sinker cam 3 and a first convex part 16a of the operating cam 15. The sinker cam 3 according to the present invention is independently operated from the operating cam 15 of cartridge type, and prevents the sinkers 4 from escaping while the sinkers 4 perform forward/backward movements. Here, shape of the

sinker cam 3 is not limited only if it can faithfully prevent the sinkers 4 from escaping while the sinkers 4 perform forward/backward movements. According to one embodiment according to the present invention, The sinker cam 3 can include an end in the upper part thereof, such that a nose 17 of the sinkers 4-1, 4-2, 4-3 and 4-4 can escape a latch of needles 5a, 5b, 5c and 5d. Therefore, since the sinkers 4-1, 4-2, 4-3 and 4-4 are spaced apart from the needles 5a, 5b, 5c and 5d about 0.5mm, a pile is not formed before the sinkers are pushed forward by the operating cam 8.

<57> Fig. 10 is a front view illustrating a structure of sinkers employed in a circular knitting machine for knitting textiles according to the present invention. As shown in Fig. 10, the plurality of sinkers 4-1, 4-2, 4-3 and 4-4 include a nose 17, respective main sinker buts 4m and control-sinker buts 4a, 4b, 4c and 4d to form a pile, and perform forward/backward movements as they operate together with the sinker cam 3 and the operating cam 15 of cartridge type, which is mounted on the sinker ring 7. For example, as mentioned above, as the sinker ring 2a is rotated, the first sinker 4-1 of Fig. 1OA passes through the operating cam 15 of Fig. 6, and the control- sinker but 4a passes through an concave part 15a between the first convex part 16a and the second convex part 16b. In this case, since the second convex part 16b of Fig. 6 includes a slant part 16', the first sinker 4-1 moves forward. Here, the main-sinker but 4m passes through a space between the sinker cam 3 of Fig. 6 and the first convex part 16a, and prevents the sinker from escaping while they perform forward/backward movements.

<58> Also, as the sinker ring 2a is rotated, the second sinker 4-2 of Fig. 1OB passes through the operating cam 15 of Fig. 6, and the control-sinker but 4b passes through a concave part 5b between the second convex part 16b and the third convex part 16c. In this case, since the third convex part 16c of Fig. 6 does not include a slant part 16' therein, the second sinker 4-2 is horizontally moved without forward/backward movements.

<59> In addition, as the sinker ring 2a is rotated, when the third and fourth sinkers 4-3 and 4-4 of Fig. 1OC pass through the operating cam 15 of

Fig. 6, the control-sinker but 4c of the third sinker 4-3 passes through an concave part 15c, and the control-sinker but 4d of the fourth sinker 4-4 passes through an concave part 15d. In this case, since the fourth and fifth convex parts 16d and 16e of Fig. 6 include a slant part 16' therein, the third and fourth sinkers 4-3 and 4-4 move forward.

<60> The sinkers 4 are plural to correspond to one operating cam 15 and/or sinker cam 3. According to one embodiment according to the present invention, 24 sinkers 4 can correspond to one operating cam 15 and/or sinker cam 3. If a circular knitting machine is implemented like such that, it is called a circular knitting machine with 24 gauges. The more the diameter of the sinker ring 7 is large and the level of the gauge is large, the more the textile is knitted such that its width is wide.

<6i> Here, since the forms of the sinkers and the sinker buts, which are illustrated in Fig. 10, are just exampled to explain the present invention, the those who skilled person in the art can easily appreciate that kinds, numbers and forms of the sinker buts are easily modified from the embodiment according to the present invention, and thus the modifications should be with the scope of the present invention.

<62> Fig. 11 is a view illustrating alignment of operating cams 15 of various cartridge types and a sinker cam 3, in a circular knitting machine for knitting textiles according to the present invention. Fig. 11 is similar to a rear view of the sinker ring 7. As shown in Fig. 11, a plurality of sinker cams 3 and a plurality of operating cams 15 of cartridge types can be attached to the sinker ring 7 in parallel. The operating cam 15 of cartridge type, located at the most right in Fig. 11, is formed such that the form of the operating cam 15 is identical to that of the operating cam in Fig. 6.

<63> When the cylinder 2 of the circular knitting machine for knitting textiles is rotated clockwise, the cylinder is rotated counter-clockwise with respect to a view from the lower side to the upper side. The sinkers 4 are rotated counter-clockwise like the cylinder 2. Therefore, the respective main-sinker buts 4m of the sinkers 4 pass through a space between the sinker

cam 3 and the first convex part 16a. Also, the respective control-sinker buts 4a, 4b, 4c and 4d of the sinkers 4 pass through one of the first, second, third and fourth concave parts 15a, 15b, 15c and 15d. When passing through the concave part in a state where the convex parts 16b, 16c, 16d, and 16e include slant parts 16' , corresponding sinker moves forward and forms a pile of textile.

<64> On the other hand, as shown in Fig. 11, an auxiliary cam 18 can be further arranged between the operating cams 15 of cartridge type. The auxiliary cam 18 applies another forward movement to one of the sinkers 4 passing through the operating cam 15 and the sinker cam 3, in which the sinker has performed a forward movement. Therefore, uniformity and reliability of formed piles can be improved.

<65> Fig. 12 to Fig. 16 are rear views illustrating embodiments of operating cams of cartridge type, which are concave parts and convex parts which are various patterns, in a circular knitting machine for knitting textiles.

<66> For example, when sinkers 4-1, 4-2, 4-3, and 4-4 having four types of control-sinker buts 4a, 4b, 4c and 4d are employed, all the sinkers, each of which passes through the operating cam 15 of cartridge type of Fig. 12A, move forward. Because the operating cam 15 of Fig. 12A has the convex parts each of which forms slant parts 16' .

<67> Also, although the first, second and third sinkers 4-1, 4-2 and 4-3, which pass though the operating cam 15 of cartridge type in Fig. 12B, moves forward, the fourth sinker 4-4 does not move forward. In addition, although the first, second and fourth sinkers 4-1, 4-2 and 4-4, which pass though the operating cam 15 of cartridge type in Fig. 12C, move forward, the third sinker 4-3 does not move forward.

<68> On the other hand, slant part 16' formed in the convex part can has various width as occasion demands. When the slant part 16' has a narrow width and does not install an auxiliary cam 18 therein, height of formed pile may be low. In this case, uniformity and reliability of the pile can be also reduced.

<69> As such, the circular knitting machine 1 for knitting textiles according to the present invention can employ operating cam 15 which has various types and forms of cartridges, such that a plurality of sinkers can perform forward/backward movements, respectively. Also, since the knitted needles 5a have needle buts 5a ¹ , 5b' 5c' and 5d' which are located at different locations to be properly operated with knitted cam 6, and operate up/down, respectively, knitted cloth can have handfeel and pile formation can be variously changed. Therefore, the circular knitting machine according to the present invention can knit textiles to have 2000 patterns, such as a check pattern, a diamond pattern, a circle pattern, an elliptic pattern, etc., as various types of operating cams 15 and knitted cams 6 are combined. [Industrial Applicability]

<70> Therefore, the circular knitting machine for knitting textiles according to the present invention has effects as follows.

<7i> First, the circular knitting machine can produce various patterns, since it includes the operating cams of cartridge type, which can knit various patterns and guide various types of sinkers.

<72> Second, the circular knitting machine for knitting textiles can employ various cartridge types of operating cams which can be replaced with others, in which the operating cams can rapidly and easily be mounted and separated thereon/therefrom, such that a small amount of textiles of various pile types, which has various patterns, can be produced at relatively low costs. Namely, since the operating cams of cartridge type can be replaced with others according to desired patterns, the circular knitting machine can simply change guide passage of the knitted needle without adjustment of the cams, in which such adjustment of the prior art has been performed in a state wherein the sinker ring is entirely taken out therefrom. Also, since cam arrangement can be arbitrarily entirely or partially performed, pattern change works can be easily performed. Therefore, working time and efforts therefor can be reduced, high-value added velour textiles can be produced, and production efficiency can be maximized.

<73> For example, it takes less than one minute to replace one operating cam of cartridge type with another one. Also, works for replacement of all the operating cams in the circular knitting machine with 24 gauges can be finished within 24minutes. Therefore, since one circular knitting machine with an operating cam of cartridge cam according to the present invention has an effect substituting tens of circular knitting machine, production costs can be reduced. Such effect can be remarkably shown when a small amount of textiles of various pile types, which has various patterns, are produced.

<74> Third, since degree of protrusion of the sinker can be arbitrarily adjusted using the operating cam of cartridge type, which guides various passages, and thus various piles can be formed, the circular knitting machine for knitting textiles with an operating cam of cartridge type can knit more than 2,000 types of patterns, such as a diamond pattern, a check pattern, etc., as combined with various knitted cams.

<75> Fourth, since operating cams are composed in plural stages, the circular knitting machine for knitting textiles with an operating cam of cartridge type can knit slant line patterns and easily and precisely control intervals of movement paths of an knitted needle, such that stitch can be evenly formed therein.

<76> On the other hand, although the drawings and the preferred embodiment according to the present invention describe a velour textile, the present invention can be also applied to all circular knitting machine which knits pile type textiles. Also, although the embodiments and drawings examples a circular knitting machine which has four types of sinkers and an operating cam of cartridge cam having four concave parts, the present invention can also employ various sinkers regardless of their number and types and various operating cams regardless of their number and types.

<77> Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the

accompanying claims.