Yarn feeding device for knitting equipment

Abstract

This invention discloses a yarn feeding device for knitting equipment, comprising: an annular conveyor belt with multiple yarn spool inserters, each yarn spool inserted into an upper part of the conveyor belt; multiple yarn end limiting blocks respectively fitted onto an annular bracket; the yarn of the first yarn spool located at the upper front end of the annular conveyor belt passes over a first guide roller and enters the knitting equipment, while the yarn ends of the remaining yarn spools are tied to the yarn end limiting grooves on the yarn end limiting blocks; the yarn end limiting block corresponding to the second yarn spool slides along the annular bracket to the limiting device, at which point the yarn on the second yarn spool crosses but does not contact the yarn connected to the first guide roller; and a splicing device for connecting the yarn on the second yarn spool to the yarn connected to the first guide roller. This device can automatically replace the yarn on the yarn spools, continuously supplying yarn to the knitting equipment, thus improving the production efficiency of the knitting equipment.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of textile equipment. More particularly, the present application relates to a yarn feeding device for a knitting equipment. BACKGROUND

[0002] With the continuous development of the textile industry, more and more textile equipment has the need of yarn feeding to adapt to the weaving of pattern design on the cloth surface and the tension of the cloth surface. Therefore, the yarn feeding device is indispensable in the production of textile equipment during the weaving process, which mainly provides yarns for the yarn storage bin to ensure normal spinning production. The circular knitting machine is composed of a machine frame, a yarn feeding mechanism, a transmission mechanism, a lubrication and dust removal (cleaning) mechanism, an electrical control mechanism, a pulling and winding mechanism and other auxiliary devices. However, the current yarn feeding mechanism places multiple yarn bobbins on the yarn rack. When the yarn on one yarn bobbin is used up, manual replacement of the yarn is required. At this time, the circular knitting machine must be stopped working. In this process, the yarn end on the previous yarn bobbin needs to be connected with the yarn end on the next yarn bobbin. Thus, it is time-consuming and laborious, which greatly reduces the working efficiency of the circular knitting machine, especially when multiple yarns need to be replaced, which further affects the production efficiency. SUMMARY

[0003] The present application provides a yarn feeding device for a knitting equipment, which can automatically replace the yarn on the yarn bobbin, continuously provide yarns for the knitting equipment, and improve the production efficiency of the knitting equipment.

[0004] In order to achieve these objects and other advantages and in accordance with the purpose of the present application, a yarn feeding device for a knitting equipment is provided, which comprises:

[0005] A circular conveying belt, a plurality of yarn bobbin inserting rods are arranged at equal intervals on the conveying belt, a yarn bobbin is inserted into each yarn bobbin inserting rod on the upper side of the circular conveying belt, a push rod is arranged on one side of each yarn bobbin inserting rod, and the push rod moves synchronously with the yarn bobbin, wherein the conveying belt intermittently conveys;

[0006] A plurality of thread limiting blocks are arranged, each thread limiting block is sleeved on a circular support, a thread limiting groove for tying the yarn end and a groove for inserting the end of the push rod are arranged on the thread limiting block;

[0007] The first wire roller is arranged on one side of the annular conveying belt and is located at the first yarn cylinder on the upper front end of the annular conveying belt. The yarn on the remaining yarn cylinders on the upper side of the annular conveying belt is tied on the thread limiting groove on the thread limiting block. When the annular conveying belt drives the yarn cylinder on the upper side to move forward, the push rod pushes the corresponding thread limiting block to move synchronously, and the thread limiting block corresponding to the second yarn cylinder slides along the annular support to a limiting device position. At this time, the yarn on the second yarn cylinder crosses but does not contacts the yarn connected to the first wire roller.

[0008] The wiring device is arranged between the first wire roller and the annular conveying belt. When the yarn on the first yarn cylinder is about to be delivered, the yarn on the second yarn cylinder and the yarn connected to the first wire roller enter the wiring device at the same time to be connected, so that the yarn on the second yarn cylinder is sent to the knitting equipment.

[0009] Preferably, the yarn feeding device for the knitting equipment, the annular support arranged on one side of the annular conveying belt comprises a first horizontal rod, a second inclined arc-shaped rod connected to the first horizontal rod, and a third inclined arc-shaped rod connected to the second inclined arc-shaped rod. The third inclined arc-shaped rod is connected to the first horizontal rod, the first horizontal rod is located above the yarn cylinder on the upper side of the annular conveying belt, and the longitudinal axis of the first horizontal rod is consistent with the conveying direction of the annular conveying belt.

[0010] The limiting device is arranged on one side of the annular support and is located in front of the first wire roller and is arranged at a position higher than that of the first wire roller.

[0011] Preferably, the yarn feeding device for the knitting equipment further comprises a plurality of yarn winding rollers, the yarn winding rollers are elastic winding rollers, and the plurality of yarn winding rollers are arranged in parallel. The yarn passing through the first wire roller sequentially passes through the gap between adjacent two yarn winding rollers and then enters the knitting equipment.

[0012] Preferably, the yarn feeding device for the knitting equipment, the wiring device comprises an air splicer, and a driving mechanism connected to the air splicer and driving the air splicer to move up and down in the vertical direction.

[0013] Preferably, the yarn feeding device for knitting equipment, the limiting device is an electromagnet module, the thread end limiting block is made of magnetic conductive material, when the thread end limiting block corresponding to the second yarn cylinder slides from the first horizontal rod to the second inclined arc-shaped rod and then to the position of the limiting device, it is attracted and fixed by the electromagnet module, when the connecting device connects the yarn on the second yarn cylinder with the yarn connected to the first guide roller, the electromagnet module loses the attraction and the thread end limiting block continues to slide on the second inclined arc-shaped rod.

[0014] Preferably, the yarn feeding device for knitting equipment, the push rod is an L-shaped push rod, the groove on the thread end limiting block is a longitudinal-axis horizontal rectangular groove, and the horizontal end of the L-shaped push rod is inserted into the groove.

[0015] Preferably, the yarn feeding device for knitting equipment further comprises a yarn cylinder collecting box located below the upper front end of the ring-shaped conveyor belt, when the yarn on the first yarn cylinder is completely transmitted, the ring-shaped conveyor belt moves forward, the second yarn cylinder becomes the first yarn cylinder, and the original first yarn cylinder falls into the yarn cylinder collecting box.

[0016] Preferably, the yarn feeding device for knitting equipment, the ring-shaped support is placed on multiple supports.

[0017] The present application at least has the following advantages:

[0018] The present application sets multiple yarn cylinders on the ring-shaped conveyor belt, when the yarn cylinder turns to the side or the lower side of the ring-shaped conveyor belt, the yarn cylinder automatically falls off the yarn cylinder insertion rod and enters the yarn cylinder collecting box, thus, only the yarn cylinders are set on the upper side of the ring-shaped conveyor belt. Since multiple thread end limiting blocks are provided, the yarn on the first yarn cylinder located at the upper front end of the ring-shaped conveyor belt is fed to the knitting equipment, the yarn ends on the remaining yarn cylinders on the upper side of the ring-shaped conveyor belt are tied on the thread end limiting grooves on the thread end limiting blocks, and the thread end limiting block corresponding to the second yarn cylinder slides along the ring-shaped support to a limiting device position, at this time, the yarn on the second yarn cylinder intersects with the yarn connected to the first guide roller but does not contact, such a setting facilitates the subsequent splicing of the yarn on the first yarn cylinder with the yarn end on the second yarn cylinder and does not affect the transmission of the yarn on the first yarn cylinder. When the yarn on the first yarn cylinder is almost completely transmitted, the yarn on the second yarn cylinder and the yarn connected to the first guide roller enter the connecting device at the same time for connection, after the connection is completed, the ring-shaped conveyor belt moves forward, the second yarn cylinder becomes the first yarn cylinder, and the original first yarn cylinder moves forward to the side of the ring-shaped conveyor belt, when the third yarn cylinder becomes the first yarn cylinder, the original first yarn cylinder continues to move forward and falls off the yarn cylinder insertion rod due to gravity.

[0019] Other advantages, objects, and features of the application will be apparent from the following specification, and upon examination of the appropriate drawings. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 Front view of the yarn feeding device for the knitting equipment in the embodiment of the application;

[0021] Figure 2 Side view of the yarn feeding device for the knitting equipment in the embodiment of the application;

[0022] Figure 3 Structure schematic diagram of the thread end limiting block in the embodiment of the application;

[0023] Figure 4 Structure schematic diagram of the bracket in the embodiment of the application. DETAILED DESCRIPTION

[0024] The application will be further described in conjunction with the drawings, so that those skilled in the art can implement the application according to the description and drawings.

[0025] It should be understood that the terms such as "have", "contain" and "include" used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0026] It should be noted that the experimental methods in the following embodiments are conventional methods, and the reagents and materials can be obtained from commercial channels unless otherwise specified. In the description of the application, it should be noted that unless otherwise explicitly specified and limited, the terms "mount", "connect", "set" should be understood broadly, for example, it can be fixedly connected, set, or detachably connected, set, or integrally connected, set. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances. The orientations or positional relationships indicated by the terms "transverse", "longitudinal", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0027] As shown in Figures 1-4 The yarn feeding device for the knitting equipment provided by the embodiment of the application comprises:

[0028] A ring-shaped conveying belt 1, a plurality of yarn cylinder insertion rods 2 are arranged at equal intervals on the ring-shaped conveying belt 1, a yarn cylinder 3 is inserted on each yarn cylinder insertion rod 2 on the upper side of the ring-shaped conveying belt 1, a push rod 8 is arranged on one side of each yarn cylinder insertion rod 2, and the push rod 8 moves synchronously with the yarn cylinder 3, wherein the ring-shaped conveying belt intermittently conveys;

[0029] A plurality of thread limiting blocks 4 are arranged, the thread limiting block 4 is provided with a through hole 16, and the thread limiting block 4 is sleeved on an annular support 6, wherein the thread limiting block 4 is provided with a thread limiting groove 15 for tying the yarn end and a groove 5 for abutting the end of the push rod 8;

[0030] A first guide roller 9 is arranged on one side of the ring-shaped conveying belt 1, and the yarn of the first yarn cylinder on the upper end of the ring-shaped conveying belt 1 passes through the first guide roller 9 into the knitting equipment, that is, the first guide roller 9 is connected to the first yarn cylinder, and the yarn end on each yarn cylinder 3 on the upper side of the ring-shaped conveying belt 1 is tied on the thread limiting groove 15 of the thread limiting block 4; wherein when the ring-shaped conveying belt 1 drives the yarn cylinder 3 on the upper side to move forward, the push rod 8 pushes the corresponding thread limiting block 4 to move synchronously, and the thread limiting block 4 corresponding to the second yarn cylinder slides along the annular support 6 to a limiting device position, at this time the yarn on the second yarn cylinder crosses but does not contact the yarn connected to the first guide roller 9, wherein the second yarn cylinder is arranged on the ring-shaped conveying belt 1 to replace the first yarn cylinder when the first yarn cylinder is used up;

[0031] A connecting device is arranged between the first guide roller 9 and the ring-shaped conveying belt 1, when the yarn on the first yarn cylinder is about to be delivered, the yarn on the second yarn cylinder and the yarn connected to the first guide roller 9 are simultaneously connected into the connecting device, so that the yarn on the second yarn cylinder is sent to the knitting equipment.

[0032] In the above embodiment, the ring-shaped conveyor belt 1 is an upper and lower conveyor belt arranged horizontally, so that the yarn bobbins 3 are arranged only on the yarn bobbin inserting rods 2 on the upper side of the ring-shaped conveyor belt 1, the ring-shaped conveyor belt 1 works intermittently, and the conveying direction is defined as forward conveying. At the beginning, the ring-shaped conveyor belt 1 does not work, a yarn bobbin 3 is arranged on each yarn bobbin inserting rod 2 on the upper side of the ring-shaped conveyor belt 1, the yarn end on the first yarn bobbin on the front end of the upper side of the ring-shaped conveyor belt 1 is provided to the knitting equipment, and the yarn ends on the remaining yarn bobbins 3 on the upper side of the ring-shaped conveyor belt 1 are tied on the yarn end limiting grooves 15 on the yarn end limiting blocks 4, and the yarn end limiting block 4 corresponding to the second yarn bobbin slides along the ring-shaped support 6 to a limiting device position, at this time, the yarn on the second yarn bobbin crosses but does not contact the yarn connected to the first guide roller 9. In this way, it is convenient to twist the yarn on the first yarn bobbin with the yarn end on the second yarn bobbin, and it does not affect the conveying of the yarn on the first yarn bobbin. When the yarn on the first yarn bobbin is about to be conveyed, the yarn on the second yarn bobbin and the yarn connected to the first guide roller 9 are simultaneously connected to the connecting device, after the connection is completed, the ring-shaped conveyor belt 1 moves forward, the moving distance is the distance between the adjacent two yarn bobbin inserting rods 2, so that the second yarn bobbin becomes the first yarn bobbin, the third yarn bobbin becomes the second yarn bobbin, and the push rod 8 pushes the yarn end limiting block 4 corresponding to the third yarn bobbin to move forward, when it moves to the position of the second yarn bobbin, the yarn end limiting block 4 slides along the ring-shaped support 6 to a limiting device position, and the original first yarn bobbin becomes an empty yarn bobbin 3 and moves forward to the side of the ring-shaped conveyor belt 1, at this time, an empty yarn bobbin inserting rod 2 moves to the upper side of the ring-shaped conveyor belt 1, at this time, a yarn bobbin 3 needs to be sleeved on the empty yarn bobbin inserting rod 2, and the yarn end on the yarn bobbin 3 is tied on a yarn end limiting groove 15. When the third yarn bobbin becomes the first yarn bobbin, the original empty first yarn bobbin continues to move forward, and due to the action of gravity, it will fall off from the yarn bobbin inserting rod 2. It should be noted that the driving device 14 of the ring-shaped conveyor belt 1 can be of the prior art, and the present embodiment is not limited in detail.

[0033] In one specific embodiment, the ring-shaped support 6 is arranged on one side of the ring-shaped conveyor belt 1, and includes a first horizontal rod 61, a second inclined arc-shaped rod 62 connected to the first horizontal rod 61, and a third inclined arc-shaped rod connected to the second inclined arc-shaped rod 62, wherein the third inclined arc-shaped rod is connected to the first horizontal rod 61, the first horizontal rod 61 is above the yarn bobbins 3 on the upper side of the ring-shaped conveyor belt 1, and the axial direction of the first horizontal rod 61 is consistent with the conveying direction of the ring-shaped conveyor belt 1.

[0034] The limiting device is arranged on one side of the ring-shaped support 6, located on the front side of the first guide roller 9 and arranged at a position higher than the first guide roller 9.

[0035] In the above embodiment, in order to facilitate the thread end limiting block 4 corresponding to the second yarn cylinder to slide along the annular support 6 to a limiting device position, therefore, the position where the first horizontal rod 61 meets the second inclined arc-shaped rod 62 is slightly further back from the center position of the second yarn cylinder, when the push rod 8 pushes the thread end limiting block 4 to move to the meeting position, the thread end limiting block 4 will move downward along the second inclined arc-shaped rod 62 under the action of gravity. In order to make the yarn on the second yarn cylinder cross but not contact the yarn connected to the first thread guide roller 9, the limiting device is located on the front side of the first thread guide roller 9 and is arranged at a position higher than the first thread guide roller 9, preferably 0.5-1 cm higher. It should be noted that since the annular support 6 is arranged in a ring shape, the second inclined arc-shaped rod is slightly turned relative to the first horizontal rod, when the push rod 8 pushes the thread end limiting block 4 to move to the position where the first horizontal rod 61 meets the second inclined arc-shaped rod 62, the thread end limiting block 4 will move downward along the second inclined arc-shaped rod 62 under the action of gravity, and the turning of the second inclined arc-shaped rod does not interfere with the forward movement of the push rod 8 when the annular conveyor belt moves forward. In addition, since the horizontal height of the second inclined arc-shaped rod 62 and the third inclined arc-shaped rod is lower than the horizontal height of the first horizontal rod, the empty thread end limiting block needs to be manually slid along the third inclined arc-shaped rod to the first horizontal rod, and the yarn end on the yarn cylinder needs to be manually tied to the thread end limiting block.

[0036] In one specific embodiment, the yarn feeding device for the knitting equipment further comprises a plurality of yarn winding rollers 10, wherein the yarn winding rollers 10 are elastic winding rollers, and the plurality of yarn winding rollers 10 are arranged in parallel, and the yarn passing through the first thread guide roller sequentially passes through the gap between adjacent two yarn winding rollers 10 and then enters the knitting equipment.

[0037] In the above embodiment, since the yarn on the second yarn cylinder enters the connecting device at the same time as the yarn connected to the first thread guide roller 9, the knitting equipment does not stop working, therefore, the yarn passing through the first thread guide roller 9 will continue to be conveyed, and the conveyed yarn will become tight, at which time the yarn is easy to break. Therefore, in order to make the yarn have a buffering process, the yarn is wound on a plurality of parallel elastic winding rollers, when the yarn is pulled tight during the connecting process of the connecting device, the elastic winding rollers will be squeezed, and the yarn will not become particularly tight, thereby avoiding the yarn from breaking. The number of elastic winding rollers is not specifically limited in the present embodiment, and is preferably 3-5.

[0038] In one specific embodiment, the connecting device comprises an air splicer 11 and a driving structure 12 connected to the air splicer 11 and driving the air splicer 11 to move up and down in the vertical direction.

[0039] In the above embodiment, the air twister 11 adopts the existing technology on the market as long as it can achieve the function of yarn twisting. The driving structure 12 adopts a driving cylinder, and the air twister 11 is fixed on the piston rod of the driving cylinder. When twisting is needed, the driving cylinder drives the air twister 11 to move upward, so that the yarn on the second yarn cylinder 3 and the yarn connected to the first guide roller 9 enter the opening of the air twister 11 at the same time. The wiring device is arranged on a support seat 13.

[0040] In one specific embodiment, the limiting device is an electromagnet module, and the thread limiting block 4 is made of magnetically conductive material. When the thread limiting block 4 corresponding to the second yarn cylinder slides from the first horizontal rod 61 to the second inclined arc-shaped rod, and then to the position of the limiting device, it is attracted and fixed by the electromagnet module. After the wiring device connects the yarn on the second yarn cylinder with the yarn connected to the first guide roller 9, the electromagnet module loses attraction after being powered off, so that the thread limiting block 4 continues to slide on the second inclined arc-shaped rod 62.

[0041] In the above embodiment, the limiting device is set as an electromagnet module. When powered on, the electromagnet module has magnetism, attracts and fixes the thread limiting block 4. After being powered off, the electromagnet module loses magnetism and cannot attract the thread limiting block 4, so that the thread limiting block 4 can continue to slide downward. However, it should be noted that if you want to slide the thread limiting block 4 on the second inclined arc-shaped rod 62 to the first horizontal rod 61, you need to manually make the thread limiting block 4 slide to the first horizontal rod 61 through the third inclined arc-shaped rod. In order to make the thread limiting block 4 slide smoothly, the connection between the first horizontal rod 61 and the second inclined arc-shaped rod 62, the connection between the second inclined arc-shaped rod 62 and the third inclined arc-shaped rod, and the connection between the third inclined arc-shaped rod and the first horizontal rod 61 are arc-shaped as much as possible.

[0042] In one specific embodiment, the push rod 8 is an L-shaped push rod 8, and the groove 5 on the thread limiting block 4 is a longitudinal axis horizontal rectangular groove 5. The horizontal end of the L-shaped push rod 8 is inserted into the groove 5.

[0043] In the above embodiment, the push rod 8 is arranged on the right side of the yarn cylinder insertion rod 2. The push rod 8 is arranged in an L shape, so that the horizontal end of the L-shaped push rod 8 is inserted into the groove 5.

[0044] In one embodiment, the yarn feeding device for knitting machine further comprises a yarn cylinder collecting box 7, which is located below the front end of the upper side of the ring-shaped conveyor belt 1. When the yarn on the first yarn cylinder is used up, the ring-shaped conveyor belt 1 is pushed forward, the second yarn cylinder becomes the first yarn cylinder, and the original first yarn cylinder falls into the yarn cylinder collecting box 7.

[0045] In one embodiment, as shown in FIG. 6, the ring-shaped support 6 is placed on a plurality of supports 17. Figure 4

[0046] In the above embodiment, since the ring-shaped support 6 is ring-shaped, and the thread end limiting block 4 also slides on the ring-shaped support 6, the ring-shaped support 6 cannot be fixed on the supports 17. In this embodiment, the ring-shaped support 6 is placed on a plurality of supports 17. When the thread end limiting block 4 slides on the ring-shaped support 6 to the supports 17, the ring-shaped support 6 is slightly lifted from the supports 17, so that the thread end limiting block 4 passes through the position of the supports 17. The supports 17 can be three or four, which is not limited in this embodiment, and can be specifically set according to the actual situation, based on the stability of the ring-shaped support 6.

[0047] The number of devices and the scale of processing described herein are used to simplify the present application. The application, modification and change of the present application are obvious to those skilled in the art.

[0048] Although the embodiments of the present application have been disclosed as above, it is not limited to the application and the embodiments listed in the specification, and can be fully applied to various fields suitable for the present application. Those skilled in the art can easily make other modifications, and therefore the present application is not limited to the specific details and the figures shown and described herein, without departing from the general concept defined by the claims and the equivalent scope.​

Claims

1. A yarn feeding device for a knitting apparatus, characterized in that, The application relates to a yarn feeding device for knitting machines, which comprises the following components: a ring-shaped conveying belt, a plurality of yarn cylinder insertion rods are arranged at equal intervals on the ring-shaped conveying belt, a yarn cylinder is inserted into each yarn cylinder insertion rod on the upper side of the ring-shaped conveying belt, a push rod is arranged on one side of each yarn cylinder insertion rod, and the push rod moves synchronously with the yarn cylinder, wherein the ring-shaped conveying belt intermittently conveys; a plurality of thread limiting blocks are arranged on a ring-shaped support, wherein a thread limiting groove for tying a yarn end and a groove for inserting the end of the push rod are arranged on the thread limiting block; a first thread guide roller is arranged on one side of the ring-shaped conveying belt, yarn on the first yarn cylinder at the front end on the upper side of the ring-shaped conveying belt passes through the first thread guide roller and enters a knitting machine, and the yarn end on each yarn cylinder on the upper side of the ring-shaped conveying belt is tied on the thread limiting groove on a thread limiting block; wherein when the yarn cylinder on the upper side of the ring-shaped conveying belt moves forward, the push rod pushes the corresponding thread limiting block to move synchronously, and the thread limiting block corresponding to the second yarn cylinder slides along the ring-shaped support to a limiting device position, at this time, the yarn on the second yarn cylinder crosses but does not contacts the yarn connected to the first thread guide roller; a connecting device is arranged between the first thread guide roller and the ring-shaped conveying belt, when the yarn on the first yarn cylinder is about to be conveyed, the yarn on the second yarn cylinder and the yarn connected to the first thread guide roller enter the connecting device to be connected at the same time, so that the yarn on the second yarn cylinder is sent to the knitting machine; wherein the ring-shaped support is arranged on one side of the ring-shaped conveying belt, and comprises a first horizontal rod, a second inclined arc-shaped rod connected with the first horizontal rod, and a third inclined arc-shaped rod connected with the second inclined arc-shaped rod, wherein the third inclined arc-shaped rod is connected with the first horizontal rod, the first horizontal rod is above the yarn cylinder on the upper side of the ring-shaped conveying belt, and the longitudinal axis of the first horizontal rod is consistent with the conveying direction of the ring-shaped conveying belt; the limiting device is arranged on one side of the ring-shaped support and is located in front of the first thread guide roller and is arranged at a position higher than that of the first thread guide roller; the limiting device is an electromagnet module, the thread limiting block is made of magnetically conductive material, when the thread limiting block corresponding to the second yarn cylinder slides from the first horizontal rod to the second inclined arc-shaped rod and then to the limiting device position, the thread limiting block is attracted and fixed by the electromagnet module, after the yarn on the second yarn cylinder and the yarn connected to the first thread guide roller are connected by the connecting device, the electromagnet module loses the attraction after being powered off, so that the thread limiting block continues to slide on the second inclined arc-shaped rod; the connecting device comprises an air splicer and a driving mechanism connected with the air splicer and driving the air splicer to move up and down in the vertical direction.

2. The yarn feeding device for a knitting machine according to claim 1, characterized in that, The application further comprises: a plurality of yarn winding rollers are arranged, the yarn winding rollers are elastic winding rollers, a plurality of yarn winding rollers are arranged in parallel, and yarn passing through the first thread guide roller sequentially passes through the gap between adjacent two yarn winding rollers and then enters the knitting machine.

3. The yarn feeding device for a knitting machine according to claim 1, wherein The push rod is an L-shaped push rod, the groove on the thread end limiting block is a longitudinal axis horizontal rectangular groove, and the horizontal part end of the L-shaped push rod is inserted into the groove.

4. The yarn feeding device for a knitting machine according to claim 1, wherein A yarn bobbin collecting box is arranged below the front end of the upper side of the ring-shaped conveying belt, when the yarn transmission on the first yarn bobbin is completed, the ring-shaped conveying belt is pushed forward, the second yarn bobbin becomes the first yarn bobbin, and the original first yarn bobbin falls into the yarn bobbin collecting box.

5. The yarn feeding device for a knitting machine according to claim 1, wherein The ring-shaped support is placed on a plurality of supports.

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