Yarn guide of circular knitting machine
By installing a steel plate and spring structure on the yarn guide, the problem of the needle tongue not being able to open when needles are missed is solved, which improves textile efficiency and fabric quality and avoids damage to the needle tongue.
Patent Information
- Application Number
- CN202422942500.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-30
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2034-11-30
AI Technical Summary
Existing yarn guides cannot automatically open the needle tongue when needles are missed, resulting in decreased fabric quality and low spinning efficiency. Furthermore, the needle tongue is easily damaged when it collides with the yarn guide.
First and second steel plates are installed on the base plate of the yarn guide and springs are connected by bolts. The steel plates are designed to overlap with the contact points of the needle hook and the needle tongue, ensuring that the steel plates push the needle tongue away when a needle is missed, thus preventing the needle tongue from colliding with the yarn guide.
It enables automatic needle tongue disengagement in the event of a missed needle, improving textile efficiency, preventing needle tongue damage, and ensuring that the quality of the fabric is not affected.
Smart Images
Figure CN223921710U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of circular knitting machine technology, specifically a yarn guide for a circular knitting machine. Background Technology
[0002] A circular knitting machine, formally known as a circular weft knitting machine, is a type of knitting equipment used to produce weft-knitted fabrics. A circular knitting machine includes a yarn feeding mechanism, a knitting mechanism, a needle selection mechanism, a take-up and pull-out mechanism, a transmission mechanism, and auxiliary devices. Due to its numerous loop-forming systems, high speed, high output, rapid pattern changes, good fabric quality, fewer processing steps, and strong product adaptability, the circular knitting machine has experienced rapid development. Circular knitting machines can be broadly classified into two categories: single-jersey and double-jersey series.
[0003] The process involves feeding the yarn through a yarn guide to the needle hook, and then the needle performs a looping motion according to the instructions of the control system to knit the yarn into various shapes of knitted fabrics.
[0004] Existing yarn guides for circular knitting machines, such as Figure 1 As shown, it includes a substrate 1, which is L-shaped. The bottom horizontal section of the substrate 1 has a first yarn guide hole 3 and a second yarn guide hole 4, and the top of the substrate has an adjustment hole 2.
[0005] The working principle of the needles of a circular knitting machine is as follows: Figure 2 As shown, position B indicates that the needle is in the open position. When using existing yarn guides, the needle latch is controlled by a coil. If a missed stitch occurs, the yarn fails to catch the needle hook, resulting in fabric defects and affecting quality. Furthermore, the needle latch cannot be opened in the next knitting cycle, requiring manual brushing or air blowing, significantly impacting work efficiency.
[0006] like Figure 3 As shown, when the knitting needles are... Figure 2 When the process transitions from state B to state C, the knitting needle moves upward as a whole. The loop presses against the needle tongue, and the back of the needle tongue presses against and impacts the needle bar. The knitting needle continues to move upward as a whole. When the loop and the needle tongue separate, the needle tongue 114 will rebound, causing the tongue spoon 1141 of the needle tongue 114 to collide with the base plate 1 of the yarn guide. The tongue spoon 1141 is relatively thin. After long-term use, the tongue spoon 1141 of the needle tongue 114 will suffer minor damage due to the impact force of the collision, thus affecting the quality of the fabric. Summary of the Invention
[0007] To address the shortcomings of existing yarn guides that fail to open the leaking needle tongue or cause collisions with the needle tongue, thus affecting fabric quality and textile efficiency, this invention provides a yarn guide for a circular knitting machine that can improve fabric quality and textile efficiency.
[0008] A yarn guide for a circular knitting machine includes a base plate, which is L-shaped. The bottom horizontal section of the base plate has a first yarn guide hole and a second yarn guide hole, and the top of the base plate has an adjustment hole. The base plate is characterized in that: a first steel plate is mounted on the center of the back side of the base plate via a first bolt; the bottom edge of one end of the first steel plate coincides with the contact point between the needle hook and the needle tongue at the open position of the lower knitting needle; the bottom edge height of the first steel plate, located between the fully open and initially closed positions of the lower knitting needle tongue, is always between the tongue pin and the tongue spoon; and on the side of the first steel plate near the final position of the lower knitting needle, the horizontal position of the bottom edge is 1.5-2.5 mm higher than the horizontal position where the lower knitting needle loop begins to disengage from the needle tongue.
[0009] Its further features are:
[0010] The bottom surface of the substrate is fitted with a second steel plate by a second bolt. The first steel plate and the second steel plate are perpendicular to each other. The position of the back side of one end of the second steel plate coincides with the position where the needle hook and the needle tongue of the upper knitting needle are in contact when the needle is open. The horizontal position of the back side of the second steel plate between the fully open position and the beginning closing position of the upper knitting needle's needle tongue is always between the tongue pin and the tongue spoon of the upper knitting needle before the needle tongue begins to close. On the side of the second steel plate near the final position of the upper knitting needle, the horizontal position of the back side is 1.5-2.5mm higher than the horizontal position where the upper knitting needle loop begins to separate from the needle tongue.
[0011] A first spring is connected between the first steel sheet and the substrate by the first bolt.
[0012] A second spring is connected between the second steel sheet and the substrate by the second bolt.
[0013] With the above-described structure of this invention, when a missed needle occurs and the latch fails to open, the tip of the steel plate will insert into the contact point between the needle hook and the latch during the needle's journey. As the needle continues to travel, the latch will be pushed open by the bottom of the steel plate, allowing the subsequent loop-forming action to continue smoothly without affecting the quality of the fabric. This eliminates the need for workers to manually open the latch after discovering a missed needle, greatly improving textile efficiency. When the latch slips off a loop, it will rebound. At this time, due to the obstruction of the steel plate, the latch bar will collide with the steel plate, while the tongue spoon will not collide with the yarn guide. The latch bar is relatively thick, so slight collisions will not cause damage, thus not affecting the quality of the fabric. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the existing technology;
[0015] Figure 2 Schematic diagram of a large circular knitting machine;
[0016] Figure 3This is a schematic diagram illustrating the operation of existing technology;
[0017] Figure 4 This is a schematic diagram of the needle plate and syringe of a double-sided circular knitting machine;
[0018] Figure 5 This is a schematic diagram of the structure of a knitting needle;
[0019] Figure 6 This is a schematic diagram of the main structure of this utility model;
[0020] Figure 7 This is a bottom view of the structure of this utility model;
[0021] Figure 8 A diagram showing the movement trajectory of the knitting needles;
[0022] Figure 9 This is a schematic diagram of the operation of this utility model. Detailed Implementation
[0023] This utility model is installed on a double-sided circular knitting machine, and the needle arrangement of the double-sided circular knitting machine is as follows: Figure 3 As shown. The needle structure of a large circular knitting machine is as follows. Figure 5 As shown, the knitting needle includes a needle bar 111, with a downwardly bent needle hook 112 at the top of the needle bar 111. A needle tongue 114 is rotatably mounted on the middle of the needle bar 111 via a tongue pin 113. The needle tongue 114 includes a tongue spoon 1141 and a tongue bar 1142. The needle tongue 114 can rotate upward so that the tongue spoon 1141 is in close contact with the needle hook 112. The needle hook 112 and the needle tongue 114 form a needle loop.
[0024] The working principle of the needles of a circular knitting machine is as follows: Figure 2 As shown, the open positions of the upper needle 11 and the lower needle 13 are between states A and B, with state B being the fully open state and state C being the highest or most convex point. The starting closing position is between states C and D. The needles move from state A to state E to form a loop system.
[0025] A yarn guide for a circular knitting machine, which is installed on a double-sided circular knitting machine, wherein the knitting needles of the double-sided circular knitting machine are arranged as follows: Figure 4 The double-sided circular knitting machine includes a cylinder 12 and a needle plate 14 installed perpendicularly to each other. Lower needles 11 are installed in the side grooves of the cylinder 12, and upper needles 13 are installed in the top grooves of the needle plate 14. The installation directions of the lower needles 11 and the upper needles 13 are perpendicular to each other. Yarn guides are sequentially installed along the outer edges of the cylinder 12 and the needle plate 14 in each loop-forming system, as shown in the figure. Figure 6 , Figure 7A yarn guide for a circular knitting machine includes a base plate 1, which is L-shaped. The bottom horizontal section of the base plate 1 has a first yarn guide hole 3 and a second yarn guide hole 4. The top of the base plate 1 has an adjustment hole 2. A first steel plate 5 is installed on the middle of the back of the base plate 1 by a first bolt 6. A first spring 7 is connected between the first steel plate 5 and the base plate 1 by the first bolt 6.
[0026] The bottom edge of one end of the first steel plate 5 coincides with the contact point between the needle hook 112 and the needle tongue 114 at the open position of the lower knitting needle 11. The height of the bottom edge of the first steel plate 5, located between the fully open position and the initial closing position of the lower knitting needle 11's needle tongue 1141, is always between the tongue pin 113 and the tongue spoon 1141. On the side of the first steel plate 5 near the final position of the lower knitting needle 11, the horizontal position of the bottom edge is 1.5-2.5mm higher than the horizontal position of the highest point along the direction of travel of the lower knitting needle 11. This ensures that the first steel plate 5 can prevent the tongue spoon 1141 from impacting the base plate 1, while not affecting the closing of the lower knitting needle 11. (See...) Figure 8 The dashed lines Y and Z in the diagram.
[0027] A second steel sheet 9 is mounted on the bottom surface of the substrate 1 by a second bolt 8. The first steel sheet 5 and the second steel sheet 9 are perpendicular to each other. A second spring 10 is connected between the second steel sheet 9 and the substrate by a second bolt 8.
[0028] The position of the back side of one end of the second steel plate 9 coincides with the position of the contact point between the needle hook 112 and the needle tongue 114 of the upper knitting needle 13 in the open position; the horizontal position of the back side of the second steel plate 9 is always between the tongue pin 113 and the tongue spoon 1141 of the upper knitting needle 13 before the needle tongue 114 begins to close.
[0029] The second steel plate 9 is located on the side near the final position of the upper needle 13, with its back side horizontal position extending 1.5-2.5mm beyond the horizontal position of the highest point along the direction of travel of the upper needle 13. This ensures that the second steel plate 9 can prevent the tongue 1141 from impacting the base plate 1, while not affecting the closing of the upper needle 13. (See...) Figure 8 The dashed lines Y and Z in the diagram.
[0030] The working process of this utility model is as follows:
[0031] The movement trajectory of the knitting needles is as follows Figure 8 As shown, positions A, B, C, and E represent the states A, B, C, and E, position H represents the initial closing position, position G represents the opening position of the upper needle 13 and the lower needle 11, and position I represents the position where the upper needle 11 and the lower needle loop begin to disengage from the needle tongue.
[0032] X represents the movement trajectory of the tip of the needle hook 112, Y represents the movement trajectory of the tongue pin 113, and Z represents the movement trajectory of the tongue 114 and the tongue spoon 1141 of the needle tongue. When a missed needle is encountered and the needle tongue does not open, when the needle reaches position G, the tip of the steel plate will insert into the contact point between the needle hook 112 and the needle tongue 114. As the needle continues to move forward, the needle tongue 114 will be pushed open by the bottom of the steel plate, thus allowing the subsequent weaving action to continue smoothly.
[0033] like Figure 9 As shown, when the knitting needle reaches position I, the needle latch 114 is pressed down by the yarn. When the yarn leaves the latch, the latch 114 rebounds. At this time, due to the obstruction of the steel plate, the tongue bar 1142 of the needle latch 114 will collide with the steel plate, while the tongue spoon 1141 will not collide with the yarn guide. The tongue bar 1142 of the needle latch 114 is relatively thick, and slight collisions will not cause damage, thus not affecting the quality of the fabric. The knitting needle continues to travel through state D, position H, state E, and state F, and the knitting needle closes again, completing one loop forming process.
[0034] When the first steel sheet 5 and the second steel sheet 9 are deflected by a large external force, the elastic force of the first spring 7 and the second spring 10 can pull the first steel sheet 5 and the second steel sheet 9 back to their original positions.
Claims
1. A yarn guide for a circular knitting machine, comprising a base plate, the base plate being L-shaped, a first yarn guide hole and a second yarn guide hole being formed in the bottom horizontal section of the base plate, and an adjustment hole being formed in the top of the base plate, characterized in that: A first steel plate is mounted on the center of the back of the substrate by a first bolt. The bottom edge of one end of the first steel plate coincides with the position where the needle hook and the needle tongue of the lower knitting needle are in contact when the needle is open. The bottom edge height of the first steel plate in the part between the fully open position and the beginning closing position of the lower knitting needle tongue is always between the tongue pin and the tongue spoon. On the side of the first steel plate near the final position of the lower knitting needle, the horizontal position of the bottom edge is 1.5-2.5mm higher than the horizontal position where the lower knitting needle loop begins to separate from the needle tongue.
2. The yarn guide for a circular knitting machine according to claim 1, characterized in that: The bottom surface of the substrate is fitted with a second steel plate by a second bolt. The first steel plate and the second steel plate are perpendicular to each other. The position of the back side of one end of the second steel plate coincides with the position where the needle hook and the needle tongue of the upper knitting needle are in contact when the needle is open. The horizontal position of the back side of the second steel plate between the fully open position and the beginning closing position of the upper knitting needle's needle tongue is always between the tongue pin and the tongue spoon of the upper knitting needle before the needle tongue begins to close. On the side of the second steel plate near the final position of the upper knitting needle, the horizontal position of the back side is 1.5-2.5mm higher than the horizontal position where the upper knitting needle loop begins to separate from the needle tongue.
3. A yarn guide for a circular knitting machine according to claim 1 or 2, characterized in that: A first spring is connected between the first steel sheet and the substrate by the first bolt.
4. A yarn guide for a circular knitting machine according to claim 2, characterized in that: A second spring is connected between the second steel sheet and the substrate by the second bolt.