Compound needle for flat knitting machine

Abstract

The utility model relates to the field of flat knitting machines, in particular to a compound needle for a flat knitting machine, which comprises a main needle and a latch needle, the main needle comprises a needle hook and a main needle rod, the needle hook is arranged at the end of the main needle rod, and a needle groove is arranged on the end face of the main needle rod corresponding to the needle hook; the latch needle comprises a needle piece and a needle guide rod, the needle piece is connected with the needle guide rod, and the needle piece can move in the needle groove; a needle latch is arranged at the end part of the needle piece, and the joint of the needle piece and the needle latch is provided with a contracted or narrowed structure. After the scheme is adopted, damage to yarns during knitting of the flat knitting machine can be reduced.

Description

Technical Field

[0001] The utility model relates to the field of flat knitting machines, in particular to a compound needle for a flat knitting machine. Background Art

[0002] A knitting machine is a knitting machine that is mainly used for transverse knitting. It weaves yarn into knitted fabric by controlling the lifting and lowering movement of the knitting needles.

[0003] At present, compound needles are increasingly used in knitting machines. The specified actions are completed through the mutual cooperation of various components in the compound needle. The compound needle generally includes a main needle with a needle hook, and a latch needle that cooperates with the main needle and yarn to complete actions such as looping, looping, gathering, and looping.

[0004] Generally, the latch needle can be arranged in the needle groove of the main needle and move relatively thereto, and two needle pieces are arranged at its end. During the movement relative to the main needle, the needle pieces can be separated from the needle hook of the main needle.

[0005] When transferring the loop, the latch needle of the compound needle on one side of the needle bed needs to push the loop out of the needle groove of the main needle, and then the main needle on the needle bed on the other side will take over the loop. In this process, since the loop is pulled by the traction mechanism below, the tension on the pushed loop will become greater and greater during the rising process of the latch needle. In this case, the loop also needs to open up enough space to ensure that the hook hook on the other side can take over the loop.

[0006] Therefore, the existing flat knitting machine yarn needs to ensure sufficient toughness and strength, otherwise there will be a risk of breakage. However, with the improvement of living standards and from the perspective of reducing production costs, the existing flat knitting machine compound needles need further improvement to meet the demand.

[0007] Taking the prior patents of Shima Seiki Co., Ltd., a representative of foreign flat knitting machine enterprises, and Ningbo Cixing Co., Ltd., a representative of domestic flat knitting machine enterprises, as examples, Shima Seiki’s early patent EP1178141B1 (reference Figure 2 ), the connecting portion where the needle tongue (i.e. 31a\b) of the latch needle is located has a thickened structure, and the recent patent JP6718856B2 (reference Figure 1 ), the connection part of the tongue of the tongue needle is a smooth structure, the composite needle disclosed in Cixing CN110438655B (refer to its Figure 7 , 8 ), the connecting portion of the needle tongue of the latch needle is also a smooth structure, that is, in the prior art, the portion to which the needle tongue of the latch needle is connected is not specially designed to solve the technical problems raised in the foregoing text.

[0008] In summary, the inventor conducted further research on this issue and developed a compound needle for a knitting machine, which resulted in the present invention. Utility Model Content

[0009] The utility model aims to provide a composite needle for a knitting machine, which can reduce the damage to the yarn during knitting of the machine.

[0010] In order to achieve the above purpose, the technical solution of the utility model is as follows:

[0011] Compound needles for knitting machines, including main needles and latch needles, of which:

[0012] The main needle includes a needle hook and a main needle rod. The needle hook is arranged at the end of the main needle rod, and a needle groove is provided on the end surface of the main needle rod corresponding to the needle hook.

[0013] The latch needle includes a needle piece and a needle guide rod. The needle piece is connected to the needle guide rod and can move in the needle groove. A needle tongue is arranged at the end of the needle piece, and the connection between the needle piece and the needle tongue has a contracted or narrowed structure.

[0014] Generally, in design, the needle hook is at the extended 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 as a reference;

[0015] The needle tongue is an extension of the needle piece, and the dividing line between it and the needle piece can refer to the position where the coil hangs on the needle tongue during operation as the connection point between the two;

[0016] For comparison, the technical solution of the prior art can refer to the Figure 8 (Only the coil in the transfer process is shown in the figure), after the latch needle on the left pushes out the transferred coil, the needle hook on the right is ready to extend into the coil to connect the coil, and the coil formed by the yarn itself has a certain elasticity. Therefore, when the coil is not subjected to insufficient downward pulling force, the direction of the coil will be guided to the right by the needle latch, making it difficult for the needle hook on the right to enter the coil. In order to ensure that the needle hook on the right can enter, sufficient pulling force is required to ensure that the coil is in a vertical state; therefore, when the prior art has not solved or considered solving this technical problem, technicians in this field all weave clothes by selecting coils that meet production needs.

[0017] Furthermore, an avoidance groove is provided at the connection between the needle plate and the needle tongue. The avoidance groove enables the connection between the needle plate and the needle tongue to have a contraction structure. In the working state, when the two needle tongues pass over the needle hook and are separated, the avoidance groove enables an avoidance gap to exist between the needle plate and the needle hook.

[0018] In the above technical solution, not only is it considered that the burden on the coil is reduced by designing the avoidance groove when transferring the coil, but it is also considered that a certain gap is left between the needle piece and the needle hook for storing the coil.

[0019] Furthermore, a guiding inclined surface is arranged near the needle hook of the needle groove.

[0020] When the needle tongue acts on the guiding inclined surface, a clearance gap can be left between the needle tongue and the needle hook, thereby gradually guiding the needle tongue to be separated by the hook needle.

[0021] Furthermore, based on the position of the compound needle in the working state, the connection between the needle sheet and the needle tongue is defined as the position in a vertical state when the coil is hung thereon, and the width of the connection is less than or equal to the maximum width of the needle tongue.

[0022] The description here is a further definition of the above-mentioned "the connection between the needle blade and the needle tongue has a contraction structure".

[0023] Furthermore, the needle guide rod is clamped and connected with the two needle sheets through the clamping portion, and the needle tongues on the two needle sheets are relatively expanded.

[0024] The needle tongue is expanded to ensure that the needle tongue can be separated by the needle hook during operation;

[0025] The clamping connection here includes: two needle blades are clamped on both sides of the clamping part, or the clamping part clamps the two needle blades in the middle.

[0026] Furthermore, the portion of the main needle rod with the needle groove is the needle groove portion, one end of the needle groove portion is a needle hook, and the other end of the needle groove portion is a solid portion, and a limiting rod is arranged at the solid portion; a limiting protrusion is arranged at the end of the limiting rod on the side close to the needle groove portion; the clamping portion of the guide needle rod is provided with a barb portion, and the barb portion and the limiting protrusion are installed in coordination.

[0027] The limiting protrusion cooperates with the barb portion to press the latch needle in the reset state into the needle groove all the time, and the latch needle will not be separated from the needle groove due to vibration during the operation of the machine.

[0028] Furthermore, an arc-shaped protrusion is arranged in the needle groove, and the bottom of the needle groove on both sides of the arc-shaped protrusion is a through groove.

[0029] The arc-shaped protrusion cooperates with the avoidance groove to also form an avoidance effect, but the avoidance here is to reduce the resistance of the latch needle when it runs in the needle groove.

[0030] Furthermore, a clearance groove is arranged on the side wall of the needle groove near the solid part, and when the latch needle pushes the coil out, the barb part runs in the clearance groove.

[0031] Since the latch needle tends to exert pressure on the main needle, a clearance groove is provided here to reduce the height of the needle latch relative to the needle hook, that is, to reduce the tension on some coils when they are pushed out.

[0032] Furthermore, the setting direction of the limiting rod is consistent with the length direction of the main needle rod, and a narrow and long U-shaped structure is formed between the limiting rod and the solid part.

[0033] Furthermore, when the latch needle pushes out the coil, there is an avoidance gap between the needle latch or the needle piece and the needle hook.

[0034] After adopting the above scheme, the utility model has the following advantages compared with the prior art:

[0035] The strength required for coil transfer is reduced, the material selection range of the coil is expanded, or the damage to the coil during weaving is reduced; and the coil transfer is made more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a schematic diagram of the composite needle of the embodiment in a non-working state;

[0037] Figure 2 This is a schematic diagram after the main needle and the latch needle are separated;

[0038] Figure 3 This is a partial enlarged view of the main needle;

[0039] Figure 4 This is a partial enlarged view of the tongue needle;

[0040] Figure 5 It is a schematic diagram of the tongue needle starting to move in the main needle;

[0041] Figure 6 This is a schematic diagram of the needle hook separating the needle latch;

[0042] Figure 7 This is a schematic diagram when preparing to move the circle;

[0043] Figure 8 It is a schematic diagram of the prior art;

[0044] Description of symbols

[0045] Main needle 1, hook 11,

[0046] Main needle bar 12, needle groove 121, guide slope 1211, arc-shaped protrusion 1212,

[0047] Through slot 122, limiting rod 123, limiting protrusion 1231, giving way slot 124;

[0048] Latch needle 2, needle piece 21, needle latch 211, avoidance groove 212, needle guide rod 22, barb part 221,

[0049] The connection 23 (needle blade and needle tongue),

[0050] Avoid gap 3, coil 4. DETAILED DESCRIPTION

[0051] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0052] like Figure 1 , 2As shown, the compound needle for a knitting machine includes a main needle 1 and a latch needle 2.

[0053] Among them, Figure 3 As shown, the main needle 1 includes a needle hook 11 and a main needle rod 12. The needle hook 11 is arranged 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 latch needle 2 has an arc-shaped protrusion 1212 at the middle position of the groove 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 close to the needle hook 11. The inclination of the guide slope 1211 is upward from the through groove 122 to the needle hook 11.

[0054] by Figure 2 , 3 The direction in the figure is taken as the standard, the needle hook 11 is located above the needle groove 121, and the solid main needle rod 12 is located below the needle groove 121. A limiting rod 123 is arranged in the solid part, and the limiting rod 123 is consistent with the length direction of the main needle rod 12 to form a narrow and long U-shaped structure; the limiting rod 123 is provided with a limiting protrusion 1231 at the end part of the side close to the needle groove 121, and the limiting protrusion 1231 is used to cooperate with the hook part 221 of the tongue needle 2, as described below for details.

[0055] like Figure 4 As shown, the latch needle 2 includes two needle blades 21 and a needle guide rod 22. The two needle blades 21 are connected to the needle guide rod 22 and are further fixed by welding or extrusion. A needle tongue 211 is provided at the end of the needle blade 21. The needle tongue 211 can be regarded as an extension of the needle blade 21. The two needle tongues 211 are slightly expanded outward, and the gap between them facilitates the insertion of the needle hook 11. The bottom edge of the connection 23 between the needle blade 21 and the needle tongue 211 is provided with an avoidance groove 212. The avoidance groove 212 has a certain length, and the avoidance groove 212 makes the connection 23 between the needle blade 21 and the needle tongue 211 have a contraction structure (the connection here is based on the state of the coil hanging on the latch needle 2, as shown in FIG. Figure 7 Taking the dotted ellipse shown in the figure as a reference, the width of this part is almost the same as the widest part of the needle tongue 211. The guide needle rod 22 is used to clamp the two needle blades 21 and is also provided with a barb 221 below, which cooperates with the limiting protrusion 1231 on the limiting rod 123.

[0056] The technical effects of this embodiment are as follows:

[0057] Figure 1In the figure, 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 avoidance groove 212 of the tongue needle 2 is relatively located above the arc-shaped protrusion 1212; the barb portion 221 and the limiting protrusion 1231 are engaged with each other, and the limiting protrusion 1231 can realize the pressing and positioning of the tongue needle 2, and the tongue needle 2 is always pressed and stabilized in the needle groove 121, and is not separated from the needle groove 121 due to the vibration during the operation of the machine.

[0058] On the basis of 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, which can not only ensure that the needle groove 121 is easier to mill out during processing, but also allow the tongue needle 2 to move in the needle groove 121 with less resistance, making it less likely to be damaged during operation.

[0059] exist Figure 5 In the figure, when the latch needle 2 just moves in the needle groove 121 relative to the main needle 1, the needle tongue 211 acts on the guiding bevel 1211, so that a clearance gap 3 is left between the needle tongue 211 and the needle hook 11 for the remaining coil; and the coil to be transferred is pushed upward by the latch needle 2; the existence of the guiding bevel 1211 prevents the yarn from being damaged by being clamped between the latch needle 2 and the needle hook 11.

[0060] exist Figure 6 In the figure, 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 hook portion 221 has not yet entered the clearance groove 124 of the main needle 1; through the action of the hook portion 221 and the main needle rod 12 (the thickness of the hook portion 221 is not enough to be embedded in the needle groove 121), the needle sheet 21 and the arc-shaped protrusion 1212, an avoidance gap 3 can also be left between the needle tongue 211 and the needle hook 11.

[0061] like Figure 7 As shown, the latch needle 2 pushes the coil 4 into place, waiting for the crochet hook on the right to take over the coil. At this time, the tension on the coil 4 is the greatest, so a clearance groove 124 is provided on the needle groove 121 of the main needle 1, so that the barb 221 can enter the clearance groove 124 to appropriately reduce the tension on the coil; and the presence of the avoidance groove 212 mentioned above can keep the coil 4 in a vertical state when the connection between the needle sheet and the needle tongue is not subjected to excessive tension, so that the crochet hook on the other side has enough space to enter and transfer the coil (the purpose cannot be achieved by narrowing the width of the needle tongue 211, otherwise the needle tongue 211 will be insufficiently strong and easily damaged).

[0062] At the same time, due to the existence of the avoidance groove 212, the avoidance gap 3 between the needle tongue 211 and the needle hook 11 still exists, which will not affect the coils stored in this space. Therefore, during the above-mentioned entire movement process, the remaining coils will not be excessively squeezed.

[0063] The above are only specific embodiments of the present utility model. At the same time, all words such as "upper, lower, left, right, middle" involved in the present utility model are for reference only and are not absolutely limiting. Any non-substantial changes made using the present utility model shall be deemed as an infringement of the protection scope of the present utility model.

Claims

1. A compound needle for a flat knitting machine, characterized in that: It includes main needle and latch needle, among which, The main needle includes a needle hook and a main needle rod. The needle hook is arranged at the end of the main needle rod, and a needle groove is provided on the end surface of the main needle rod corresponding to the needle hook. The latch needle includes a needle piece and a needle guide rod. The needle piece is connected to the needle guide rod and can move in the needle groove. A needle tongue is arranged at the end of the needle piece, and the connection between the needle piece and the needle tongue has a contracted or narrowed structure.

2. The compound needle for a flat knitting machine according to claim 1, characterized in that: An avoidance groove is arranged at the connection between the needle piece and the needle tongue. The avoidance groove makes the connection between the needle piece and the needle tongue have a contraction structure. In the working state, when the two needle tongues pass over the needle hook and are separated, the avoidance groove can make an avoidance gap exist between the needle piece and the needle hook.

3. The compound needle for a flat knitting machine according to claim 1, characterized in that: A guiding inclined surface is arranged near the needle hook of the needle groove.

4. The compound needle for a flat knitting machine according to claim 1, characterized in that: Based on the position of the compound needle in the working state, the connection between the needle piece and the needle tongue is defined as the position in a vertical state when the coil is hung thereon, and the width of the connection is less than or equal to the maximum width of the needle tongue.

5. The compound needle for a flat knitting machine according to claim 1, characterized in that: The needle guide rod is clamped and connected with the two needle sheets through the clamping part, and the needle tongues on the two needle sheets are relatively expanded.

6. The compound needle for a flat knitting machine according to claim 1, characterized in that: The part of the main needle rod with the needle groove is the needle groove part, one end of the needle groove part is the needle hook, and the other end of the needle groove part is a solid part, and a limiting rod is arranged at the solid part; a limiting protrusion is arranged at the end of the limiting rod on the side close to the needle groove part; the clamping part of the guide needle rod is provided with a barb part, and the barb part and the limiting protrusion are installed in coordination.

7. The compound needle for a flat knitting machine according to claim 1, characterized in that: An arc-shaped protrusion is arranged in the needle groove, and the groove bottoms of the needle groove on both sides of the arc-shaped protrusion are through grooves.

8. The compound needle for a flat knitting machine according to claim 6, characterized in that: A clearance groove is arranged on the side wall of the needle groove near the solid part, and when the latch needle pushes the coil out, the barb part runs in the clearance groove.

9. The compound needle for a flat knitting machine according to claim 6, characterized in that: The setting direction of the limit rod is consistent with the length direction of the main needle rod, and a narrow and long U-shaped structure is formed between the limit rod and the solid part.

10. The compound needle for a flat knitting machine according to claim 1, characterized in that: When the latch needle pushes out the coil, there is an avoidance gap between the needle latch or needle piece and the needle hook.

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