KR101003079B1 - Sinker apparatus for double cylinder type circular knitting machine - Google Patents

Abstract

The present invention relates to a double cylinder circular knitting machine, and more particularly, to a sinker device of a double cylinder circular knitting machine which improves the operability of the sinkers used to knit various kinds of knitted tissues.

The present invention is fixedly installed at the lower end of the upper cylinder, a plurality of grooves are formed radially, the plurality of grooves is a straight upper sinker bed made of a straight; A lower sinker bed fixedly installed at an upper end of the lower cylinder and having a plurality of grooves radially formed, the plurality of grooves having a curved cross section; A plurality of upper sinkers individually movable back and forth along each groove of the upper sinker bed; And a plurality of lower sinkers individually sliding in a curved direction along respective grooves of the lower sinker bed.

Circular knitting machine, sinker bed, sinker, forward and backward, moving, sliding

Description

SINKER APPARATUS FOR DOUBLE CYLINDER TYPE CIRCULAR KNITTING MACHINE}

The present invention relates to a double cylinder circular knitting machine, and more particularly, to a sinker device of a double cylinder circular knitting machine which improves the operability of the sinkers used to knit various kinds of knitted tissues.

As is well known, a knitting machine is a kind of textile machine which produces a loop (nose) by knitting the yarn supplied to the knitting needle, and twists the loop in the horizontal and vertical directions to produce the intended knitted fabric.

This knitting machine is composed of a feeding mechanism for supplying a thread to the knitting needle and a knitting device that performs a knitting movement to form a loop with the supplied yarn, and a warp knitting machine and a weft yarn for knitting the warp in the longitudinal direction. It is roughly divided into the knitting machine which knits in a horizontal direction.

Among these, the circular knitting machine belongs to the category of the knitting machine, and the needles are arranged in a circular shape on the cylinder to produce an annular knitted fabric continuously, and the annular knitted fabric is usually finished into clothing through a cutting process.

Among these circular knitting machines, a double cylinder circular knitting machine having two upper and lower cylinders is widely used. The double cylindrical circular knitting machine is composed of an upper cylinder and a lower cylinder which rotates, and a plurality of upper cylinders and lower cylinders are formed on each outer circumferential surface thereof. Grooves are formed, and each of the grooves is interposed with a plurality of jacks, each jack is moved up and down by a cam box disposed on the outside of each cylinder, both of the jacks by the vertical movement of these jacks the upper cylinder and the lower It is made to knit the yarn supplied from the feeding mechanism while moving up and down along each groove of the cylinder.

In addition, a plurality of upper sinkers and a plurality of lower sinkers are separately installed at adjacent ends of the upper cylinder and the lower cylinder, and the upper sinker and the lower sinkers serve to assist the loop formation of the thread caught on the hooks of the two teeth. do.

However, the sinker device of the conventional double cylinder type circular knitting machine has a disadvantage in that it is difficult to manufacture a solid tissue knitted fabric as it does not guarantee the operability of the upper sinker and the lower sinker.

In addition, since the sinker device of the conventional double cylinder type circular knitting machine has a structure in which the operation of the upper sinker and the lower sinker is very limited, only the monotonous tissues such as plain stitches and rib stitches are knitted. It is not possible to design the appearance of the knitted fabrics in various ways, and as a result, the external aesthetics of the knitted fabrics are lowered, thereby lowering the merchandise and the convenience of wearing.

Accordingly, the present invention has been made in view of the above, and the double cylinder-type circular knitting machine which can facilitate the production of a more solid knitted fabric by improving the operability of the upper and lower sinkers installed between the upper cylinder and the lower cylinder. The purpose is to provide a sinker device.

In addition, the present invention is a sinker of a double-cylinder circular knitting machine that can produce a more sophisticated design by forming a variety of knitted fabrics, such as not only flat tissue, ribs but also links stitch, pile stitch, etc. The object is to provide a device.

The present invention for achieving the above object,

A sinker device of a double cylinder type circular knitting machine having rotatably installed upper and lower cylinders, and double-needles operating together to move up and down along the upper and lower cylinders.

An upper sinker bed fixedly installed at a lower end of the upper cylinder, a plurality of grooves being radially formed, the plurality of grooves having a straight shape;

A lower sinker bed fixedly installed at an upper end of the lower cylinder, a plurality of grooves being radially formed, the plurality of grooves having a curved cross section;

A plurality of upper sinkers individually movable back and forth along each groove of the upper sinker bed; And

And a plurality of lower sinkers which individually slide in a curved direction along each groove of the lower sinker bed.

The upper sinkers comprise a plurality of first and second upper sinkers,

The first upper sinker has a rear end is flat, has a locking end inclined in the upper direction at the front end, a guide groove is formed at the bottom thereof,

The second upper sinker has a groove formed at a rear end thereof, a locking end inclined upwardly at the front end thereof, and a guide groove formed at a lower end thereof.

The lower sinkers comprise a plurality of first and second lower sinkers having a curved cross section corresponding to the grooves of the lower sinker bed,

The first lower sinker has a butt on one side and a throat on the front end,

The second lower sinker has a butt on one side and a closed surface on the tip.

A base is disposed below the upper sinker bed, and a guide cam is fixed to an upper surface of the base, a guide groove of the upper sinker is inserted to be guided along the guide cam, and the upper cylinder and the upper sinker bed are rotated. By operation, the guide groove of the upper sinker is guided along the guide cam, so that the upper sinkers move forward and backward.

The grooves of the upper sinker bed are divided into first and second regions, the plurality of first upper sinkers are disposed in grooves in the first region, and the plurality of second upper sinkers are disposed in grooves in the second region. It is characterized by.

The full cam is installed in the center hollow portion of the upper sinker bed to be movable in the vertical direction, and the end of the pull cam is pushed by the rear ends of the first and second upper sinkers by the vertical movement of the pull cam. It is characterized in that the two upper sinkers protrude from the upper sinker bed in stages.

The lower sinkers are guided in a curved direction by guide cams disposed in the inner diameter portion of the lower sinker bed, and the guide cams include first and second guide cams disposed to face each other. Guide surfaces are formed on the facing portions of the second guide cam, and the guide surfaces of the first guide cam and the guide surfaces of the second guide cam are spaced at regular intervals to form guide paths, and the guide paths include the first And each butt of the second lower sinker is guided.

According to the present invention as described above, it is possible to facilitate the production of a more solid knitted fabric by improving the operability of the upper sinker and the lower sinker provided between the upper cylinder and the lower cylinder.

In addition, the present invention has the advantage that it is possible to manufacture a knitted fabric of a more refined design by forming a variety of knitted tissue, such as not only flat tissue, rib tissue, but also links (pile stitch).

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the following examples are only illustrative to help understanding of the present invention, and the present invention is not limited thereto, and the present invention can be variously changed and modified within the scope of the technical idea, and the modifications and claims are attached to the appended claims. Will be understood to belong to.

Figure 1 illustrates a double cylinder type circular knitting machine to which the knitting device of the present invention is applied.

As shown, the double cylinder type circular knitting machine is a circular knitting unit 100, the feeding mechanism 10 for supplying a plurality of yarns arranged outside the circular knitting machine main body 100, the yarn supplied by the feeding mechanism 10 The knitting device 20 to knit, the sinker device 200 which cooperates with the knitting device 20, the drive device (not shown) which drives the said knitting device 20, and the sinker device 200, etc. are included. In addition, a suction pipe 101 is installed on the upper cover 105 of the circular knitting body 100, and a suction fan (not shown) is installed on the suction pipe 101 to suck the knitted fabric by the knitting device 20. Discharge to the outside.

Knitting device 20 is supported by the lower support plate 110, the intermediate support plate 120, the upper support plate 130, as shown in Figure 2, the lower support plate 110, the intermediate support plate ( 120, the upper support plate 130 is fixed by the connecting rod 140.

The knitting device 20 is formed on the outer circumferential surface of the upper and lower cylinders 21 and 22, the upper and lower cylinders 21 and 22, which are individually rotatable by a driving mechanism, as shown in Figs. A plurality of jacks 27, which perform a predetermined knitting operation by using a plurality of jacks 25, 26 moving up and down along the plurality of grooves 21a, 22a, a yarn supplied by the feeding mechanism 10, and a predetermined A plurality of sections divided into numbers are fixed to the inner and outer surfaces of the upper and lower cam boxes 23 and 24 and the cam boxes 23 and 24 disposed circumferentially on the respective outer peripheral surfaces of the upper and lower cylinders 21 and 22. And a plurality of cams 28 and 29 which form predetermined guide paths 28a and 29a to guide the vertical movement of the jacks 25 and 26.

Gears 21c and 22c are coupled to each of the upper end of the upper cylinder 21 and the lower end of the lower cylinder 22, and each of these gears 21c and 22c is configured to rotate simultaneously by the drive mechanism 90.

The drive mechanism 90 includes a drive gear 91 driven by a drive motor (not shown), a rotation shaft 92 fixed to the drive gear 91, and first and lower ends of the rotation shaft 92, respectively. And second electric gears 93 and 94, each of the first and second electric gears 93 and 94 being connected to the gear 21c of the upper cylinder 21 and the gear 22c of the lower cylinder 22. Are matched.

The upper cylinder 21 has its upper outer circumferential surface supported by the thrust bearing 31 and the radial bearing 32, and the thrust bearing 31 and the radial bearing 32 are connected via a bearing housing 34. It is installed on the upper support plate 130 of the circular knitting machine body (10).

The lower cylinder 22 has a bushing 38 fixed to its lower end, and a gear 22c is coupled to the bushing 38. The outer circumferential surface of the bushing 38 is rotatably supported by the thrust bearing 36 and the radial bearing 37, and the thrust bearing 36 and the radial bearing 37 are circular knitting machines via the bearing housing 35. It is installed on the lower support plate 110 of the body (10).

As described above, the present invention allows the upper and lower cylinders 21 and 22 to be rotatably supported in the axial direction by the thrust bearings 31 and 36, and to be stably rotated in the circumferential direction by the radial bearings 32 and 37. By being supported, a rocking phenomenon or the like during rotation operation can be prevented, thereby enabling a more precise knitting operation.

The upper and lower cylinders 21 and 22 are radially formed with a plurality of grooves 21a and 22a extending in the longitudinal direction on each outer circumferential surface thereof. The plurality of jacks 25 and 26 are interposed so as to be movable up and down individually on the grooves 21a and 22a of the upper and lower cylinders 21 and 22, and at least one butt (a side surface of each jack 25 and 26). 25a and 26a are provided, and hooks 25b and 26b are formed on the free ends of the jacks 25 and 26 to catch the two teeth 27. The plurality of jacks 25, 26 are operated by a plurality of selectors 74 which move up and down along the groove 22a of the lower cylinder 22, and the plurality of selectors 74 are individually driven by the actuator 73. Controlled.

The plurality of bilateral needles 27 are selectively between the upper jack 25 and the hooks 25b and 26b of the lower jack 26 which move along the grooves 21a and 22a of the upper and lower cylinders 21 and 22. While the hook is moving, the yarn supplied from the feeding mechanism 10 is looped to perform a predetermined knitting operation of wrought iron in the horizontal or vertical direction.

The upper and lower cam boxes 23 and 24 are annular by circumferentially arranging a plurality of sections divided into a predetermined number on each outer side of the upper and lower cylinders 21 and 22.

A plurality of cams 28 and 29 are installed on the inner side surfaces of the respective sections of the upper and lower cam boxes 23 and 24 so as to guide predetermined butts 25a and 26a of the jacks 25 and 26 described above. The furnaces 28a and 29a are formed.

In addition, the sinker device 200 of the present invention includes an upper sinker bed 210 and a lower sinker bed 220 disposed separately on the end sides of the upper and lower cylinders 21 and 22 facing each other.

As illustrated in FIG. 5, the upper sinker bed 210 may be fixedly installed by being key-coupled by one or more coupling keys 210e to the lower inner diameter surface of the upper cylinder 21. As a result, the upper sinker bed 210 rotates together with the upper cylinder 21.

In addition, a base 230 is disposed below the upper sinker bed 210, and the base 230 is fixed to the lower end of the support tube 470 passing through the inner hollow of the upper cylinder 21. That is, the base 230 may be fixed through the fastener 231 at the lower end of the support tube 470, as shown in FIGS. 2 and 3. As a result, the upper sinker bed 210 is rotatably supported by the upper surface of the base 230.

In addition, a guide cam 232 is provided on an upper surface of the base 230, and the guide cam 232 is configured to guide the forward and backward movement of the upper sinkers 310 and 320 as described below.

As illustrated in FIG. 3, the upper sinker bed 210 has a plurality of grooves 210a radially formed on an outer circumferential surface thereof, and a plurality of upper sinkers 310 and 320 are individually disposed in each groove 210a. . The upper sinkers 310 and 320 are alternately arranged with the groove 21a of the upper cylinder 21.

As illustrated in FIG. 6, the plurality of upper sinkers 310 and 320 may be formed of first and second upper sinkers 310 and 320 having different structures. For example, the lower portion of the rear end of the first upper sinker 310 may be formed flat, and the groove 322 may be formed on the lower portion of the second upper sinker 320.

The first and second upper sinkers 310 and 320 may be arranged while dividing the grooves 210a of the upper sinker bed 210 into a predetermined area. That is, as shown in FIG. 8, the grooves 210a of the upper sinker bed 210 are divided into first and second regions 250 and 260, and the grooves 210a of the first region 250 are formed in the grooves 210a of the first region 250. The first upper sinker 310 may be disposed, and the second upper sinker 320 may be disposed in the grooves 210a of the second region 260. Accordingly, the first and second upper sinkers 310 and 320 may be protruded in a radial direction, which will be described later, in stages, and the first and second upper sinkers 310 and 320 may be viewed through the stepped protrusion operations of the first and second upper sinkers 310 and 320. The sinker device 200 of the present invention can easily organize a variety of file organization.

Each of the upper sinkers 310 and 320 has guide grooves 310a and 320a fitted to the guide cam 232 at the lower portion thereof, and the guide grooves 310a and 320a are guided along the guide surface of the guide cam 232. do. That is, the upper sinkers 310 and 320 are guided along the guide surface of the guide cam 232 by the upper sinkers 310 and 320 by the rotation operation of the upper cylinder 21 and the upper sinker bed 210. The upper sinkers 310 and 320 move forward and backward along respective grooves 210a of the upper sinker bed 210.

In addition, the front end of each of the upper sinkers (310, 320) is provided with a locking end (310b, 320b) is fastened thread is caught, the locking end (310b, 320b) has a structure inclined in the upper direction.

As the upper sinkers 310 and 320 selectively move forward and backward by the guide cams 232, the present invention provides a variety of flat tissues as well as links tissues and pile stitches. Can be organized.

In particular, the sinker device 200 of the present invention, as shown in Figure 5, the pull cam (410, pull cam) is installed in the central hollow portion of the upper sinker bed 210 to be movable in the vertical direction. In particular, as the full cam 410 is moved to the inner diameter of the guide cam 232 as shown in Figures 3 and 8 by the end of the pull cam 410 pushes the rear end of the upper sinker (310, 320) The first and second upper sinkers 310 and 320 protrude in the outer diameter direction of the upper sinker bed 210 in stages. Here, the protruding directions of the first and second upper sinkers 310 and 320 by the full cam 410 are in a direction facing the feeding mechanism 10, whereby the first and second upper sinkers 310 and 320 are disposed. The file organization can be organized using the thread supplied from the yarn feeding mechanism 10 in cooperation with the two needles 27. For example, a semi-pile pile or ring-shaped pile can be knitted in a predetermined position (for example, a back of a sock, a sole, a heel, a heel, etc.) of an annular knitted fabric.

In particular, according to the present invention, the protruding operation of the first and second upper sinkers 310 and 320 may be performed stepwise according to the upward movement position of the full cam 410.

In more detail, as shown in FIG. 5, when the full cam 410 rises to a height located in the groove 322 of the second upper sinker 320, the end of the full cam 410 may have a first upper sinker ( By pushing only the rear end of the 310, only the first upper sinker 310 protrudes in the outer diameter direction of the upper sinker bed 210.

Then, when the full cam 410 is raised to a position higher than the groove 322 of the second upper sinker 320, the end of the full cam 410 may be formed at both rear ends of the first and second upper sinkers 310 and 320. By pushing out, both the first and second upper sinkers 310 and 320 protrude in the outer diameter direction of the upper sinker bed 210.

In addition, when the full cam 410 is lowered below the rear end of the first and second upper sinkers 310 and 320, the end of the full cam 410 is rearward of the first and second upper sinkers 310 and 320. Since the first and second upper sinkers 310 and 320 are not in contact with the ends, the first and second upper sinkers 310 and 320 do not protrude in the outer diameter direction of the upper sinker bed 210.

That is, the sinker device 200 of the present invention can easily organize a variety of pile structures through the stepped protrusion operation of the first and second upper sinkers 310 and 320 by the vertical movement of the pull cam 410 of the present invention. Can be.

The pull cam 410 is fixed through the fastener 415 at the end of the actuator 420 as shown in Figure 3, the actuator 420 is the operating cylinder 450 and the drive shaft as illustrated in FIG. It is moved by the 460, whereby the full cam 410 can operate up and down within a predetermined interval with the actuator 420.

On the other hand, the sinker device 200 of the present invention may adopt a lubrication structure for implementing the smooth forward and backward operability of the upper sinkers (310, 320) or removal of fiber debris.

The lubrication structure includes an oil supply pipe 478 installed at one side of the support pipe 470, a first oil supply passage 491 formed at the bottom of the support pipe 470, and an upper sinker bed at one side of the upper sinker bed 210. The second oil supply passage 492 is formed to communicate with the groove 210a of the 210. In particular, the first oil supply passage 491 communicates with the space between the support pipe 470 and the upper sinker bed 210, and the second oil supply passage 492 communicates with the first oil supply passage 491. It consists of a structure for supplying oil to the guide cam 232 and the upper sinker (310, 320) side.

Thus, when oil is supplied through the oil supply pipe 478, the upper sinker bed 210 and the upper sinker 310, 320 moving forward and backward through the first and second oil supply passage (491, 492). The oil is supplied to the side so that the rotational driving of the upper sinker bed 210 and the forward and backward operations of the upper sinkers 310 and 320 may be more smoothly performed.

The lower sinker bed 220 is fixedly installed by one or more coupling keys 220e on the upper inner diameter surface of the lower cylinder 22 as shown in FIGS. 3 and 7, whereby the lower sinker bed 220 is It rotates together with the lower cylinder 22.

The lower sinker bed 220 has a plurality of grooves 220a radially formed at an upper end thereof, and each groove 220a has a curved cross section as shown in FIGS. 3 and 4. A plurality of first and second lower sinkers 330 and 340 are alternately disposed in each groove 220a, and one surface of each of the lower sinkers 330 and 340 corresponds to the groove 220a of the lower sinker bed 220. Consists of a curved cross section. These first and second lower sinkers 330 and 340 are alternately arranged with the grooves 22a of the lower cylinder 22.

Guide cams 226a and 226b are installed at inner diameters of the lower sinker bed 220, and the guide cams 226a and 226b are provided at the upper ends of the lower support pipes 222. It is installed to be supported by). The lower support tube 222 is installed through the inner hollow of the lower cylinder 22.

The guide cams 226a and 226b include first and second guide cams 226a and 226b, and the first and second guide cams 226a and 226b face each other, that is, the first guide cam 226a. Guide surfaces 226c and 226d are formed on the bottom surface and the top surface of the second guide cam 226b, respectively, and the guide surfaces 226c and 226d are spaced at regular intervals, and the spaces thereof are guide paths 226e. Becomes The first and second guide cams 226a and 226b are installed on the inner diameter of the lower sinker bed 220 by the first and second fixing cups 227a and 227b, and the first and second fixing cups 227a. , 227b is interposed between the bearings 227b.

The first lower sinker 330 has a butt 330a on one surface adjacent to the guide paths 226e of the first and second guide cams 226a and 226b, and has a throat 330b at its distal end.

By this configuration, the first lower sinker 330 is the butt 330a is guided along the guide path 226e of the first and second guide cams 226a and 226b, and the guide operation of the butt 330a is performed. As a result, the first lower sinker 330 may be curved reciprocated by sliding in one surface thereof in a curved direction along the groove 220a of the lower sinker bed 220. It is possible to more precisely and firmly form the loop by moving the reciprocating curve in a direction orthogonal to the double-headed needles 27 in the state of hanging the yarn fed to the side 330b).

The second lower sinker 340 is formed with a curved surface one surface thereof corresponding to the groove 220a of the lower sinker bed 220, and is adjacent to the guide paths 226e of the first and second guide cams 226a and 226b. It has a butt (340a) on one side, the front end has a closing surface (340b) for closing the side of the throat (330b) of the first lower sinker (330).

The second lower sinker 340 has its butt 340a guided along the guide paths 226e of the first and second guide cams 226a and 226b described above, and the closed surface of the second lower sinker 340 ( When the 340b protrudes from the groove 220a of the lower sinker bed 220, the side projection jaw (not shown) of the lower side jack 26 moving along the groove 22a of the lower cylinder 22 is closed. By pressing the lower portion of the 340b, the closing surface 58b of the second lower sinker 58 closes the throat 330b of the first lower sinker 54 disposed in both lateral directions, thereby closing the first lower sinker 54. The thread fed to the throat 330b of the sinker 330 is not caught.

For example, in order to knit the heel or the front heel of the sock, the upper and lower cylinders 21 and 22 should be alternately rotated in the rotational direction. When caught by the throat 330b of 330, the thread may be broken by the change of the rotation direction. Therefore, when the rotation direction of the cylinders 21 and 22 is changed according to the knitting pattern, the second lower sinker 340 is operated so that the closing surface 340b is the throat 330b of the first lower sinker 330. By closing the yarn to be fed is not caught in the throat 330b.

As described above, the present invention assists the knitting operation while the upper sinkers 310 and 320 move in the radial direction, and the lower sinkers 330 and 340 implement a sliding sliding structure in a curved direction to further shorten the movement path. By minimizing interference with components, the sinker device 200 of a more compact size can be realized, as well as the precise mobility of the lower sinkers 330 and 340, thereby forming various knitted structures, controlling the appearance of the knitted fabric, and controlling the size of the loop. It is possible to further improve the sinker function such as.

In addition, the present invention is the knitting efficiency of the lower sinker by independently driving the first lower sinker 330 and the second lower sinker 340 to prevent the thread from being caught in the first lower sinker 330. There is a feature to improve.

In addition, the first and second lower sinkers 330 and 340 of the present invention have a curved structure sliding in the grooves 220a of the lower sinker bed 220, so that the movement path thereof may be shortened to other components. By minimizing the interference with the sinker device 200 of a more compact size is an advantage.

1 is a view showing a general double cylinder circular knitting machine.

2 is a cross-sectional view showing a state in which the sinker device of the present invention is applied to a double cylinder circular knitting machine.

3 is a cross-sectional view showing a sinker device of the present invention.

4 is an enlarged detailed view of an arrow A portion of FIG. 3.

Figure 5 is a block diagram showing a full cam and the upper sinkers of the sinker device according to the present invention.

Figure 6 is an exploded perspective view showing the upper sinker bed structure of the sinker device according to the present invention.

7 is an exploded perspective view showing a lower sinker bed structure of the sinker device according to the present invention.

8 is a plan view illustrating a structure in which a plurality of first and second upper sinkers are arranged in an upper sinker bed according to the present invention.

Brief description of symbols for the main parts of the drawings

200: sinker device 210: upper sinker bed

220: lower sinker bed 310, 320: upper sinker

330, 340: Lower Sinker 410: Full Cam

420: actuator

Claims (5)

A sinker device of a double cylinder type circular knitting machine having rotatably installed upper and lower cylinders, and double-needles operating together to move up and down along the upper and lower cylinders. An upper sinker bed fixedly installed at a lower end of the upper cylinder, a plurality of grooves being radially formed, the plurality of grooves having a straight shape; A lower sinker bed fixedly installed at an upper end of the lower cylinder, a plurality of grooves being radially formed, the plurality of grooves having a curved cross section; A plurality of upper sinkers individually movable back and forth along each groove of the upper sinker bed; And And a plurality of lower sinkers which individually slide in a curved direction along each groove of the lower sinker bed. The upper sinkers are composed of a plurality of first and second upper sinkers, The first upper sinker has a rear end is flat, has a locking end inclined in the upper direction at the front end, a guide groove is formed at the bottom thereof, The second upper sinker has a groove formed at a rear end thereof, a locking end inclined upwardly at the front end thereof, and a guide groove formed at a lower end thereof. The lower sinkers are composed of a plurality of first and second lower sinkers having a curved cross section corresponding to the grooves of the lower sinker bed, The first lower sinker has a butt on one side and a throat on the front end, The second lower sinker has a butt on one surface, and a sinker device of a double cylinder type circular knitting machine, characterized in that the front end has a closed surface. The method of claim 1, A base is disposed below the upper sinker bed, and a guide cam is fixed to an upper surface of the base, a guide groove of the upper sinker is inserted to be guided along the guide cam, and the upper cylinder and the upper sinker bed are rotated. And a guide groove of the upper sinker is guided along the guide cam by the operation so that the upper sinkers move forward and backward. The method of claim 1, The grooves of the upper sinker bed are divided into first and second regions, the plurality of first upper sinkers are disposed in grooves in the first region, and the plurality of second upper sinkers are disposed in grooves in the second region. A sinker device of a double cylinder circular knitting machine, characterized in that. The method of claim 1, The full cam is installed in the central hollow portion of the upper sinker bed to be movable in the vertical direction, and the end of the pull cam is pushed by the rear ends of the first and second upper sinkers by the vertical movement of the pull cam. 2. A sinker device of a double cylinder circular knitting machine, characterized in that the upper sinkers protrude from the upper sinker bed step by step. The method of claim 1, The lower sinkers are guided in a curved direction by guide cams disposed in the inner diameter portion of the lower sinker bed, and the guide cams include first and second guide cams disposed to face each other. Guide surfaces are formed on the facing portions of the second guide cam, and the guide surfaces of the first guide cam and the guide surfaces of the second guide cam are spaced at regular intervals to form guide paths, and the guide paths include the first And each butt of the second lower sinker is guided by the sinker device of the double cylinder type circular knitting machine.

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