Weft-direction yarn feeding guide assembly of circular knitting machine

Abstract

The utility model provides a weft yarn feeding guide assembly of a circular knitting machine, which solves the problems of yarn guiding and buffering and the like and comprises a fixed base, a guide arm extending upwards is mounted on the fixed base, a plurality of guide rollers are rotatably mounted on the guide arm, and a yarn winding assembly is mounted between every two adjacent guide rollers. A limiting frame body opposite to the guide rolling wheel is installed on the fixed base, and a sensing assembly is arranged between the limiting frame body and the yarn winding assembly. The yarn buffering device has the advantages of being stable in structure, good in yarn buffering effect and the like.

Description

Technical Field

[0001] This utility model belongs to the field of textile equipment technology, specifically relating to a weft yarn feeding guide component for a circular knitting machine. Background Technology

[0002] Yarn feeding on a knitting machine involves delivering yarn to the knitting area in a suitable manner to ensure the smooth progress of the knitting process. Existing circular knitting machines rely on the yarn's own tension for feeding. As yarn is consumed during knitting, the yarn tension increases, causing the yarn on the bobbin to be drawn out. For example, in some simple manual knitting tools, the process of pulling the yarn from the bobbin is similar to passive yarn feeding. However, mechanical knitting machines have corresponding tension adjustment devices to control the tension range, preventing excessive or insufficient tension. These tension adjustment devices are usually implemented using springs, weights, or other elastic elements. When the yarn tension is too high, the adjustment device appropriately relaxes the constraint on the yarn; conversely, when the yarn tension is too low, it increases resistance to maintain the yarn at a relatively stable tension. However, in actual use, the adjustment margin is insufficient, and temporary yarn buffering cannot be achieved during the feeding process.

[0003] To address the shortcomings of existing technologies, people have conducted long-term explorations and proposed various solutions. For example, Chinese patent literature discloses a yarn feeding mechanism for a circular knitting machine [201811636243.9], which includes a yarn frame placed on the ground around the circular knitting machine, a support ring set on the frame of the circular knitting machine, a yarn storage device set on the support ring, and a yarn feeding nozzle set on the needle plate of the circular knitting machine. A height lifting component is provided between the yarn frame and the yarn storage device. The height lifting component includes a height telescopic component and a lifting pulley. The lifting pulley is set on the height telescopic component, and the height of the lifting pulley is located between the yarn frame and the yarn storage device. After the yarn is unwound from the yarn loop on the yarn frame, it passes around the lifting pulley and is then fed into the yarn storage device.

[0004] The above solution has solved the problem of yarn tension adjustment to some extent, but it still has many shortcomings, such as poor yarn buffering effect. Summary of the Invention

[0005] The purpose of this invention is to address the above-mentioned problems by providing a reasonably designed weft feeding guide component for a circular knitting machine that can temporarily buffer yarn.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a weft yarn feeding guide assembly for a circular knitting machine, comprising a fixed base, an upwardly extending guide arm mounted on the fixed base, a plurality of guide rollers rotatably mounted on the guide arm, a yarn winding assembly mounted between adjacent guide rollers, a limiting frame mounted on the fixed base opposite to the guide rollers, and a sensing component disposed between the limiting frame and the yarn winding assembly.

[0007] In the aforementioned weft feeding guide assembly for a circular knitting machine, the fixed base includes a main body and an adapter plate disposed on one side of the main body. The adapter plate has an adapter hole and an adapter groove. The fixed base is slidably inserted into the guide arm and fixed by a threaded component.

[0008] In the aforementioned weft feeding guide assembly of a circular knitting machine, the main body has a yarn guide groove extending to the edge, and a pair of parallel yarn guide rollers are rotatably installed inside the yarn guide groove. A rotating bearing is installed between the yarn guide rollers and the main body.

[0009] In the aforementioned weft feeding guide assembly for a circular knitting machine, the guide arm includes a vertically arranged main arm body, and several inclined upward-extending secondary arm bodies are arranged along the vertical direction on the main arm body. Each secondary arm body has an assembly groove, and an assembly block is slidably installed in the assembly groove. The guide roller is rotatably connected to the assembly block in a one-to-one correspondence.

[0010] In the aforementioned weft feeding guide assembly of a circular knitting machine, a guide groove is provided on the outer side of the guide roller, and the cross-section of the guide groove is V-shaped.

[0011] In the aforementioned weft feeding guide assembly for a circular knitting machine, an elastic buffer is installed between the assembly block and the assembly groove. A locking knob is rotatably installed on the assembly block, and the locking knob is connected to a locking block that presses against the assembly groove via a locking shaft that is threaded to the assembly block.

[0012] In the above-mentioned weft feeding guide assembly of a circular knitting machine, the yarn winding assembly includes a yarn winding plate vertically mounted on a fixed base. The yarn winding plate has a yarn winding hole located between the guide rollers. A yarn winding motor is mounted on the yarn winding plate. The output end of the yarn winding motor is connected to a yarn winding shaft extending into the yarn winding hole. A winding assembly is mounted on the yarn winding shaft.

[0013] In the aforementioned weft feeding guide assembly for a circular knitting machine, the winding assembly includes a drum that is circumferentially limited and axially slidably connected to the yarn winding shaft. The drum has a winding opening that is radially through and opposite to the guide roller. An electromagnet and an elastic reset member are installed between the drum and the yarn winding plate.

[0014] In the aforementioned weft feeding guide assembly for a circular knitting machine, the limiting frame includes a limiting rod mounted on a fixed base, and the limiting rod is disposed between adjacent guide rollers.

[0015] In the aforementioned weft feeding guide assembly for a circular knitting machine, the sensing component includes a piezoelectric sensor disposed between the limiting rod and the fixed base.

[0016] Compared with existing technologies, the advantages of this utility model are as follows: a yarn winding assembly is set between the guide rollers of the fixed base to temporarily store and buffer the yarn, and the sensing assembly is used to maintain the stability of the yarn supply; a dynamic adjustment structure is set between the guide rollers and the guide arm to adapt to knitting circular knitting machines of different specifications and transmission rates; the winding assembly pulls the yarn, and the use of electromagnets and elastic reset components improves the fault response rate. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a structural schematic diagram from another perspective of the present invention;

[0019] Figure 3 This is a structural schematic diagram from another perspective of the present invention;

[0020] In the figure, there are: fixed base 1, main body 11, adapter plate 12, adapter hole 13, adapter groove 14, yarn guide groove 15, yarn guide roller 16, guide arm 2, main arm body 21, auxiliary arm body 22, assembly groove 23, assembly block 24, locking knob 25, locking shaft 26, locking block 27, guide roller 3, guide groove 31, yarn winding assembly 4, yarn winding plate 41, yarn winding hole 42, yarn winding motor 43, yarn winding shaft 44, winding drum 45, winding opening 46, limiting frame body 5, and limiting rod 51. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0022] like Figure 1-3 As shown, a weft-direction yarn feeding guide assembly for a circular knitting machine includes a fixed base 1 that is movably or fixedly installed above the circular knitting machine. To guide the yarn into loops, an upwardly extending guide arm 2 is mounted on the fixed base 1. Several guide rollers 3, which directly contact the yarn, are rotatably mounted on the guide arm 2. A yarn winding assembly 4 is installed between adjacent guide rollers 3. A limiting frame 5, opposite to the guide rollers 3, is mounted on the fixed base 1. A sensing component is positioned between the limiting frame 5 and the yarn winding assembly 4. Under normal conditions, the yarn winding assembly 4 is stationary and does not affect yarn transmission. When the yarn becomes misaligned, detaches, or breaks, the sensing component detects this, and the yarn winding assembly 4 winds up and collects the excess yarn. Simultaneously, the yarn winding assembly 4 can also be actively activated for tension adjustment.

[0023] Specifically, the fixed base 1 is made of stainless steel and includes a main body 11 and an adapter plate 12 disposed on one side of the main body 11. The adapter plate 12 has an adapter hole 13 and an adapter groove 14. The fixed base 1 and the guide arm 2 are slidably inserted and fixed by threaded parts. The guide arm 2 can be flexibly disassembled and replaced, thereby adjusting the relative position and number of the guide rollers 3.

[0024] Deeply, the main body 11 has a yarn guide groove 15 extending to the edge. A pair of parallel yarn guide rollers 16 are rotatably mounted inside the yarn guide groove 15, and a rotating bearing is installed between the yarn guide rollers 16 and the main body 11. The yarn guide groove 15 limits the movement of the yarn, and the parallel arrangement of the yarn guide groove 15 ensures that the yarn makes normal contact with the yarn guide groove 15 without affecting its transmission.

[0025] Furthermore, the guide arm 2 has an irregular structure, including a vertically arranged main arm body 21, with several inclined upward-extending secondary arm bodies 22 arranged along the vertical direction. Each secondary arm body 22 has an assembly groove 23, and an assembly block 24 is slidably installed within the assembly groove 23. The guide rollers 3 are rotatably connected to the assembly blocks 24 in a one-to-one correspondence. The multiple guide rollers 3 are staggered in the vertical direction, and the yarn is pressed and fixed between the guide rollers 3.

[0026] Furthermore, a circumferential guide groove 31 is provided on the outer side of the guide roller 3, and the cross-section of the guide groove 31 is V-shaped. This guide groove 31 ensures that the yarn is always pressed and fixed on the guide roller 3, and also prevents the yarn from detaching from the guide roller 3 when the yarn winding assembly 4 is started.

[0027] In addition, an elastic buffer is installed between the assembly block 24 and the assembly groove 23. A locking knob 25 is rotatably mounted on the assembly block 24. The locking knob 25 is connected to a locking block 27 that presses against the assembly groove 23 via a locking shaft 26 that is threaded to the assembly block 24. Because the assembly block 24 adopts a movable connection structure, it provides a certain buffer margin for yarn transmission under the action of the elastic buffer. The locking block 27 is pressed against the assembly groove 23 to lock the position.

[0028] Meanwhile, the yarn winding assembly 4 includes a yarn winding plate 41 vertically mounted on the fixed base 1. The yarn winding plate 41 has a yarn winding hole 42 located between the guide rollers 3. A yarn winding motor 43 is mounted on the yarn winding plate 41. The output end of the yarn winding motor 43 is connected to a yarn winding shaft 44 extending into the yarn winding hole 42. A winding assembly is mounted on the yarn winding shaft 44.

[0029] As can be seen, the winding assembly includes a drum 45 that is circumferentially limited and axially slidably connected to the winding shaft 44. The drum 45 has a winding opening 46 that extends radially and is opposite to the guide roller 3. An electromagnet and a resilient reset member are installed between the drum 45 and the winding plate 41. When the sensing assembly detects an abnormality in the yarn, the electromagnet is de-energized and the resilient reset member drives the drum 45 to spring back. Then, the winding shaft 44 rotates under the drive of the winding motor 43, thereby driving the yarn to wind.

[0030] Clearly, the limiting frame 5 is mainly used in conjunction with the sensing components, specifically including limiting rods 51 mounted on the fixed base 1, with the limiting rods 51 positioned between adjacent guide rollers 3. Multiple limiting rods 51 work together to restrict the movement trajectory of the yarn.

[0031] Preferably, the sensing component includes a piezoelectric sensor disposed between the limiting rod 51 and the fixed base 1. When the yarn comes into contact with the limiting rod 51, the piezoelectric sensor senses and sends an electrical signal.

[0032] In summary, the principle of this embodiment is as follows: the fixed base 1 is installed above the large circular knitting machine, and its guide roller 3 drives the yarn transmission. During the transmission process, the yarn winding assembly 4 and the sensing assembly connected to the limiting frame 5 cooperate to sense and quickly wind and collect abnormal yarn.

[0033] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0034] Although this document frequently uses terms such as fixed base 1, main body 11, adapter plate 12, adapter hole 13, adapter groove 14, yarn guide groove 15, yarn guide roller 16, guide arm 2, main arm body 21, auxiliary arm body 22, assembly groove 23, assembly block 24, locking knob 25, locking shaft 26, locking block 27, guide roller 3, guide groove 31, yarn winding assembly 4, yarn winding plate 41, yarn winding hole 42, yarn winding motor 43, yarn winding shaft 44, winding drum 45, winding opening 46, limiting frame body 5, and limiting rod 51, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A weft feeding guide assembly for a circular knitting machine, comprising a fixed base (1), wherein an upwardly extending guide arm (2) is mounted on the fixed base (1), and a plurality of guide rollers (3) are rotatably mounted on the guide arm (2), characterized in that, A yarn winding assembly (4) is installed between adjacent guide rollers (3), and a limiting frame (5) opposite to the guide rollers (3) is installed on the fixed base (1). A sensing component is provided between the limiting frame (5) and the yarn winding assembly (4).

2. The weft yarn feeding guide assembly for a circular knitting machine according to claim 1, characterized in that, The fixed base (1) includes a main body (11) and an adapter plate (12) disposed on one side of the main body (11). The adapter plate (12) has an adapter hole (13) and an adapter groove (14). The fixed base (1) is slidably inserted into the guide arm (2) and fixed by a threaded component.

3. The weft feeding guide assembly for a circular knitting machine according to claim 2, characterized in that, The main body (11) has a yarn guide groove (15) extending to the edge. A pair of parallel yarn guide rollers (16) are rotatably installed inside the yarn guide groove (15). A rotating bearing is installed between the yarn guide rollers (16) and the main body (11).

4. The weft feeding guide assembly for a circular knitting machine according to claim 1, characterized in that, The guide arm (2) includes a vertically arranged main arm body (21), and the main arm body (21) has several inclined upward extending secondary arm bodies (22) arranged in the vertical direction. Each secondary arm body (22) has an assembly groove (23) and an assembly block (24) is slidably installed in the assembly groove (23). The guide roller (3) is rotatably connected to the assembly block (24) in a one-to-one correspondence.

5. The weft feeding guide assembly for a circular knitting machine according to claim 4, characterized in that, The guide roller (3) is provided with a guide groove (31) that surrounds it in the circumferential direction, and the guide groove (31) has a V-shaped cross section.

6. The weft feeding guide assembly for a circular knitting machine according to claim 4, characterized in that, An elastic buffer is installed between the assembly block (24) and the assembly groove (23). A locking knob (25) is rotatably installed on the assembly block (24). The locking knob (25) is connected to a locking block (27) that presses against the assembly groove (23) via a locking shaft (26) that is threaded to the assembly block (24).

7. The weft feeding guide assembly for a circular knitting machine according to claim 1, characterized in that, The yarn winding assembly (4) includes a yarn winding plate (41) vertically mounted on a fixed base (1). The yarn winding plate (41) has a yarn winding hole (42) located between guide rollers (3). A yarn winding motor (43) is mounted on the yarn winding plate (41). The output end of the yarn winding motor (43) is connected to a yarn winding shaft (44) extending into the yarn winding hole (42). A winding assembly is mounted on the yarn winding shaft (44).

8. The weft feeding guide assembly for a circular knitting machine according to claim 7, characterized in that, The winding assembly includes a drum (45) that is circumferentially limited and axially slidably connected to the yarn winding shaft (44). The drum (45) has a winding opening (46) that is radially through and opposite to the guide roller (3). An electromagnet and an elastic reset member are installed between the drum (45) and the yarn winding plate (41).

9. A weft feeding guide assembly for a circular knitting machine according to claim 1, characterized in that, The limiting frame (5) includes a limiting rod (51) installed on a fixed base (1), and the limiting rod (51) is arranged between adjacent guide rollers (3).

10. A weft feeding guide assembly for a circular knitting machine according to claim 9, characterized in that, The sensing component includes a piezoelectric sensor disposed between the limiting rod (51) and the fixed base (1).

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