Compound needle for flat knitting machine
By designing clearance grooves and clearance gaps in the composite needle, the problem of yarn breakage caused by excessive coil tension is solved, achieving the effects of reducing yarn damage and expanding the range of yarn materials.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- ZHEJIANG RUIFENG INTELLIGENT TECH CO LTD
- Filing Date
- 2024-07-03
- Publication Date
- 2026-07-14
AI Technical Summary
In the existing composite needle knitting process, the loops are subjected to excessive tension during the transfer of loops, which makes the yarn prone to breakage. In addition, the yarn strength requirements are high, making it difficult to meet the needs of reducing production costs.
A composite needle was designed, in which a clearance groove is provided at the connection between the main needle and the tongue needle, and a shrinkage structure is provided at the connection between the needle plate and the needle tongue. A clearance gap is left between the needle hook and the needle tongue. The tension of the coil is reduced when the coil is shifted by the cooperation of the guide slope and the limiting rod.
It reduces the strength requirements of the coil during loop transfer, expands the range of yarn selection, reduces yarn damage, and improves the ease of weaving.
Smart Images
Figure CN118756420B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of flat knitting machines, and specifically to a composite needle for flat knitting machines. Background Technology
[0002] A knitting machine is a type of knitting machinery, mainly used for horizontal knitting. It knits yarn into fabric by controlling the up-and-down movement of the needles.
[0003] Currently, compound needles are being used more and more commonly on knitting machines. The compound needle completes the specified action by cooperating with the various components. A compound needle generally includes a main needle with a hook, and a latch needle that works with the main needle and yarn to complete actions such as looping, looping away, loop gathering, and loop unwinding.
[0004] Generally, the tongue needle can be set in the needle groove of the main needle and move relative to it. Its end is provided with two needle plates. During the movement relative to the main needle, the needle plates can be separated from the needle hook of the main needle.
[0005] During the transfer of the loop, the latch needle of one side of the composite needle bed needs to push the loop out of the needle groove of the master needle, and then the master needle of the other side of the needle bed takes over the loop. During this process, due to the pulling force of the lower traction mechanism, the tension on the pushed-out loop will increase as the latch needle rises. In this case, the loop also needs to open up enough space to ensure that the hook needle on the other side can take over the loop.
[0006] Therefore, existing flat knitting machine yarns need to ensure sufficient toughness and strength, otherwise there is a risk of breakage. However, with the improvement of living standards and from the perspective of reducing production costs, existing flat knitting machine composite needles need further improvement to meet the requirements.
[0007] Taking the prior patents of Shima Seiki Co., Ltd., a representative of foreign flat knitting machine manufacturers, and Ningbo Cixing Co., Ltd., a representative of domestic flat knitting machine manufacturers, as examples, Shima Seiki's early patent EP1178141B1 (refer to its...) Figure 2 The connecting part where the tongue of the tongue needle (i.e., 31a\b) is located has a thickened structure, as seen in the recent patent JP6718856B2 (see its...). Figure 1 The connecting part of the tongue of the tongue needle has a smooth structure, as disclosed in the composite needle in CN110438655B by Cixing (refer to its...). Figure 7 , 8 Furthermore, the connecting part of the tongue of the tongue needle is also a smooth structure. In other words, in the existing technology, no special design has been made for the part where the tongue of the tongue needle is connected to solve the technical problem mentioned above.
[0008] In summary, the inventors conducted further research and developed a composite needle for flat knitting machines, which led to this invention. Summary of the Invention
[0009] The purpose of this invention is to provide a composite needle for a flat knitting machine, which can reduce damage to the yarn during flat knitting.
[0010] To achieve the above objectives, the technical solution of the present invention is as follows:
[0011] A composite needle for a flat knitting machine includes a master needle and a latch needle, wherein...
[0012] The main needle includes a needle hook and a main needle bar. The needle hook is located at the end of the main needle bar, and a needle groove is provided on the end face of the main needle bar corresponding to the needle hook. A guide slope is provided near the needle hook in the needle groove.
[0013] The tongue needle includes two needle plates and a guide rod. The two needle plates are connected to the guide rod, and the ends of the needle plates are provided with a needle tongue.
[0014] A clearance groove is provided at the connection between the needle plate and the needle tongue. The clearance groove gives the connection between the needle plate and the needle tongue a contraction or narrowing structure. At the same time, in the working state, when the two needle tongues pass over the needle hook and are separated, the clearance groove can create a clearance gap between the needle plate and the needle hook.
[0015] In general, the needle hook is located at the extension end of the main needle bar, and there is no obvious boundary between the two. Therefore, the needle hook can be distinguished by the projection of its needle tip or by the guide slope of the needle groove.
[0016] As an extension of the needle plate, the boundary between the needle tongue and the needle plate can be referenced to the position where the coil is hung on the needle tongue during operation as the connection point between the two.
[0017] The above technical solution not only considers reducing the burden on the coil during coil transfer by designing an avoidance groove, but also considers leaving a certain gap between the needle plate and the needle hook to store the coil.
[0018] In comparison, the technical solutions of existing technologies can be referenced in this case. Figure 8 (Only the coil in the transfer loop is shown in the diagram.) After the left-side latch pushes out the transfer loop, the right-side hook prepares to insert into the loop to join it. However, the loop formed by the yarn itself has a certain elasticity. Therefore, when the downward tension on the loop is insufficient, the direction of the loop will be guided to the right by the latch, making it difficult for the right-side hook to enter the loop. In order to ensure that the right-side hook can enter, sufficient tension is needed to ensure that the loop is in a vertical state. Therefore, when the prior art has not solved or considered a solution to this technical problem, those skilled in the art all choose loops that meet the production requirements for clothing weaving.
[0019] Furthermore, taking the position of the composite needle in its working state as a reference, the connection between the needle plate and the needle tongue is defined as the position where the coil is hung on it in a vertical state. Then, the width of this connection is less than or equal to the maximum width of the needle tongue.
[0020] This description further defines the previously mentioned "the connection between the needle plate and the needle tongue has a contractile structure".
[0021] Furthermore, the guide rod is clamped and connected to the two needle plates through the clamping part, and the needle tongues on the two needle plates are relatively outwardly expanded.
[0022] The needle tongue is expanded to ensure that it can be separated from the needle hook during operation;
[0023] The clamping connection here includes: two needle plates clamping on both sides of the clamping part, or the clamping part clamping two needle plates in the middle.
[0024] Furthermore, the part of the main needle bar with a needle groove is called the needle groove section. One end of the needle groove section is a needle hook, and the other end of the needle groove section is a solid part. A limit rod is provided at the solid part. A limit protrusion is provided at the end of the limit rod near the needle groove section. The clamping part of the guide needle bar is provided with a barb, and the barb and the limit protrusion are installed together.
[0025] The limiting protrusion, together with the barb, can keep the tongue needle in the needle groove in the return state, so that it will not be affected by the vibration of the machine during operation and will not be dislodged from the needle groove.
[0026] Furthermore, the needle groove is provided with an arc-shaped protrusion, and the bottom of the needle groove on both sides of the arc-shaped protrusion is a through groove.
[0027] The arc-shaped protrusion, in conjunction with the clearance groove, also serves to create clearance, but here the clearance is to reduce the resistance of the tongue needle as it runs in the needle groove.
[0028] Furthermore, a relief groove is provided on the side wall of the needle groove near the solid part, and the barb part runs in the relief groove when the tongue needle pushes out the coil.
[0029] Since the tongue needle tends to exert pressure on the main needle when subjected to force, a relief groove is set here to reduce the height of the tongue needle relative to the hook needle, thereby reducing the tension on the coil when it is pushed out.
[0030] Furthermore, the setting direction of the limiting rod is consistent with the length direction of the main needle rod, and a narrow U-shaped structure is formed between the limiting rod and the solid part.
[0031] Furthermore, during the process of the tongue needle pushing out the coil, there is a clearance between the needle tongue or needle plate and the needle hook.
[0032] By adopting the above solution, the present invention has the following advantages compared with the prior art:
[0033] It reduces the strength required for coil transfer, increases the range of materials that can be selected for the coil, or reduces the damage that occurs during coil braiding; making coil transfer more convenient. Attached Figure Description
[0034] Figure 1 This is a schematic diagram of the composite needle in the non-working state in the embodiment;
[0035] Figure 2 This is a diagram showing the main needle and tongue needle after separation;
[0036] Figure 3 This is a magnified view of the main needle;
[0037] Figure 4 This is a magnified view of a portion of the tongue needle.
[0038] Figure 5 This is a diagram illustrating the beginning of movement in the main needle of the tongue acupuncture.
[0039] Figure 6 This is a diagram illustrating the separation of the needle hook from the needle tongue;
[0040] Figure 7 This is a diagram illustrating the preparation for moving the circle.
[0041] Figure 8 This is a schematic diagram of existing technology;
[0042] Label Explanation
[0043] Main needle 1, hook 11,
[0044] Main needle bar 12, needle groove 121, guide bevel 1211, arc-shaped protrusion 1212
[0045] Through groove 122, limit rod 123, limit protrusion 1231, clearance groove 124;
[0046] 2. Needle tongue, 21. Needle plate, 211. Needle tongue, 212. Clearance groove, 22. Guide rod, 221. Barb part.
[0047] (The connection point between the needle plate and the needle tongue) 23,
[0048] Avoid gap 3, coil 4. Detailed Implementation
[0049] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.
[0050] like Figure 1 , 2 As shown, a composite needle for a flat knitting machine includes a main needle 1 and a latch needle 2.
[0051] Among them, such as Figure 3As shown, the main needle 1 includes a needle hook 11 and a main needle rod 12. The needle hook 11 is located at the end of the main needle rod 12. A needle groove 121 is provided on the end face of the main needle rod 12 corresponding to the needle hook 11. The tongue needle 2 has an arc-shaped protrusion 1212 at the middle position of the bottom of the needle groove 121. Through grooves 122 are provided on both sides of the arc-shaped protrusion 1212. A guide slope 1211 is provided at one end of the needle groove 121 near the needle hook 11. The guide slope 1211 is inclined upward from the through groove 122 to the needle hook 11.
[0052] by Figure 2 , 3 With the direction in mind, the needle hook 11 is located above the needle groove 121, and below the needle groove 121 is a solid main needle bar 12. A limiting rod 123 is provided in this solid part. The limiting rod 123 and the main needle bar 12 are aligned in the same length direction to form a narrow U-shaped structure. A limiting protrusion 1231 is provided at the end of the limiting rod 123 near the needle groove 121. The limiting protrusion 1231 is used to cooperate with the barb part 221 of the tongue needle 2, as detailed below.
[0053] like Figure 4 As shown, the tongue needle 2 includes two needle plates 21 and a guide rod 22. The two needle plates 21 are connected to the guide rod 22 and further fixed by welding or extrusion. A needle tongue 211 is provided at the end of each needle plate 21. The needle tongue 211 can be considered an extension of the needle plate 21. The two needle tongues 211 are slightly widened outwards, and the gap between them facilitates the insertion of the needle hook 11. A relief groove 212 is provided at the bottom edge of the connection point 23 between the needle plate 21 and the needle tongue 211. The relief groove 212 has a certain length, and it gives the connection point 23 between the needle plate 21 and the needle tongue 211 a contractile structure (the connection point here is referenced to the state where the coil is hung on the tongue needle 2, such as...). Figure 7 (As shown in the figure); with the dotted ellipse shown in the figure as a reference, the structure of this part is almost the same width as the widest part of the needle tongue 211. The guide rod 22 is also provided with a barb part 221 below the two needle pieces 21 for clamping, and the barb part 221 cooperates with the limiting protrusion 1231 on the limiting rod 123.
[0054] The technical effects of this embodiment are as follows:
[0055] Figure 1 In the middle, the tongue needle 2 is in a non-working state (that is, when the compound needle is in the zero position). The tongue needle 2 is located in the needle groove 121, and the clearance groove 212 of the tongue needle 2 is located above the arc-shaped protrusion 1212. The barb part 221 and the limiting protrusion 1231 engage with each other. The limiting protrusion 1231 can realize the pressing and positioning of the tongue needle 2. The tongue needle 2 is always pressed and stable in the needle groove 121, and is not affected by the vibration of the machine during operation and will not be dislodged from the needle groove 121.
[0056] While allowing the tongue needle 2 to slide without falling off, the bottom part of the needle groove 121 is opened to form a through groove 122. This not only makes it easier to mill the needle groove 121 during processing, but also allows the tongue needle 2 to move in the needle groove 121 with less resistance, making it less likely to be damaged during operation.
[0057] exist Figure 5 When the latch needle 2 moves relative to the main needle 1 in the needle groove 121, the latch needle 211 interacts with the guide slope 1211. Therefore, a clearance 3 is left between the latch needle 211 and the needle hook 11 for the remaining loop. The loop to be moved is pushed upward by the latch needle 2. The presence of the guide slope 1211 prevents the yarn from being damaged by the clamping between the latch needle 2 and the needle hook 11.
[0058] exist Figure 6 In the middle, the needle tongue 211 is located on both sides of the needle hook 11, but the tongue needle 2 has not yet pushed the coil to the highest point, so the barb part 221 has not yet entered the clearance groove 124 of the main needle 1; through the action of the barb part 221 and the main needle bar 12 (the thickness of the barb part 221 is not enough to be embedded in the needle groove 121), the needle plate 21 and the arc-shaped protrusion 1212, a clearance gap 3 can also be left between the needle tongue 211 and the needle hook 11.
[0059] like Figure 7 As shown, the latch needle 2 pushes the coil 4 into place, waiting for the hook needle on the right to take the loop. At this time, the coil 4 is under the greatest tension. Therefore, a relief groove 124 is provided on the needle groove 121 of the main needle 1, which allows the barb part 221 to enter the relief groove 124, appropriately reducing the tension on the coil. The existence of the relief groove 212 mentioned above allows the coil 4 to remain vertical without excessive tension at the connection between the needle plate and the latch, so that the hook needle on the other side has enough space to enter and transfer the loop (this cannot be achieved by narrowing the width of the latch 211, otherwise the latch 211 will not be strong enough and will be easily damaged).
[0060] Meanwhile, the presence of the clearance groove 212 ensures that the clearance gap 3 between the needle tongue 211 and the needle hook 11 still exists, which will not affect the coil stored in this space. Therefore, during the entire movement process, the remaining coil will not be subjected to excessive compression.
[0061] The above are merely specific embodiments of the present invention. Furthermore, terms such as "upper," "lower," "left," "right," and "middle" used in the present invention are for reference only and are not absolute limitations. Any non-substantial modifications made using the present invention shall be considered as infringing upon the protection scope of the present invention.
Claims
1. A composite needle for a flat knitting machine, characterized in that: Including the main needle and the tongue needle, among which, The main needle includes a needle hook and a main needle bar. The needle hook is located at the end of the main needle bar, and a needle groove is provided on the end face of the main needle bar corresponding to the needle hook. A guide slope is provided near the needle hook in the needle groove. The tongue needle includes two needle plates and a guide rod. The guide rod is clamped and connected to the two needle plates through a clamping part. The end of the needle plate is provided with a needle tongue, and the clamping part of the guide rod is provided with a barb. A clearance groove is provided at the connection between the needle plate and the needle tongue. The clearance groove gives the connection between the needle plate and the needle tongue a contraction or narrowing structure. At the same time, in the working state, when the two needle tongues pass over the needle hook and are separated, the clearance groove can make a clearance gap exist between the needle plate and the needle hook. The part of the main needle bar with a needle groove is called the needle groove part. One end of the needle groove part is a needle hook, and the other end of the needle groove part is a solid part. A relief groove is provided on the side wall of the needle groove near the solid part. When the tongue needle pushes out the coil, the barb part runs in the relief groove. The needle groove is also provided with an arc-shaped protrusion, and the bottom of the needle groove on both sides of the arc-shaped protrusion is a through groove.
2. The composite needle for a flat knitting machine according to claim 1, characterized in that: Taking the position of the composite needle in its working state as a reference, the connection between the needle plate and the needle tongue is defined as the position where the coil is hanging on it in a vertical state. Then the width of this connection is less than or equal to the maximum width of the needle tongue.
3. The composite needle for a flat knitting machine according to claim 1, characterized in that: The needle tongues on the two needle plates are relatively outwardly wide.
4. A composite needle for a flat knitting machine according to claim 1, characterized in that: A limit rod is provided at the solid part; a limit protrusion is provided at the end of the limit rod near the needle groove; the barb part and the limit protrusion are installed together.
5. A composite needle for a flat knitting machine according to claim 4, characterized in that: The limiting rod is set in the same direction as the length of the main needle rod, and a narrow U-shaped structure is formed between the limiting rod and the solid part.
6. A composite needle for a flat knitting machine according to claim 1, characterized in that: During the process of the tongue needle pushing out the coil, there is a clearance between the needle tongue or needle plate and the needle hook.