A needle-holding device for a jacquard needle of a stocking machine

Abstract

The application discloses a needle hiding device for jacquard needles of a hosiery knitting machine, comprising a needle cylinder, a plurality of needle grooves being distributed in the circumference of the needle cylinder; a knitting assembly and a needle lifting cam being arranged around the needle cylinder, the knitting assembly comprising, from bottom to top, a jacquard needle, a bottom needle and a knitting needle, the jacquard needle being lifted upward under the action of a needle lifting slope of the needle lifting cam, further comprising a blocking mechanism arranged above the needle lifting cam, the blocking mechanism comprising a needle hiding blocking plate and a fixing part, wherein the needle hiding blocking plate is arranged in parallel with the needle lifting slope a; the jacquard needle has a total knife tooth and a needle butt, a gap being formed between the total knife tooth and the needle butt; the needle butt is blocked by the blocking mechanism when the jacquard needle is in a needle hiding state. The application innovatively sets a blocking mechanism on the running track of the jacquard needle, and ingeniously designs the blocking mechanism in the running track of the gap of the jacquard needle, so that the needle hiding phenomenon of the jacquard needle in a needle hiding state of the hosiery knitting machine during high-speed operation is effectively prevented.

Description

Technical Field

[0001] This application relates to the field of sock knitting machine technology, and in particular to an anti-needle slippage device for jacquard needles in a concealed needle sock knitting machine. Background Technology

[0002] When the jacquard needle moves in the cylinder, the hidden needle jacquard technique increases the number of jacquard patterns, resulting in richer patterns and colors. However, during the knitting process, the jacquard needle cannot return directly to the bottom after completing the jacquard pattern; instead, it remains hidden in the middle. At this point, the jacquard needle is easily affected by centrifugal force and may stick out (i.e., fly needle). When the heel of the jacquard needle touches the beveled surface of the jacquard triangle, it may accidentally rise and hook the thread, causing the pattern to become messy.

[0003] Traditional techniques typically involve bending the jacquard needle to increase friction within the needle groove, thus preventing needle slippage. However, excessive bending of the jacquard needle can lead to excessive resistance during machine operation, limiting the machine's speed. Furthermore, while bending the jacquard needle can partially solve the problem of scrambled patterns, it is unreliable. After prolonged use, the degree of bending of the jacquard needle decreases, reducing friction within the needle groove, and needle slippage or scrambling can still occur. Utility Model Content

[0004] This application provides an anti-needle slippage device for jacquard needles in a concealed-needle sock knitting machine, which can solve the problem that existing jacquard needles in sock knitting machines are prone to slippage during the use of concealed-needle jacquard, resulting in messy knitted patterns.

[0005] To achieve the above objectives, this application provides an anti-needle slippage device for jacquard needles in a concealed-needle sock knitting machine, comprising: A syringe, with several needle grooves distributed circumferentially on the syringe; The knitting assembly and lifting triangle are arranged around the cylinder. The knitting assembly includes jacquard needles, bottom needles and knitting needles inserted from bottom to top. The jacquard needles are lifted upward by the lifting slope of the lifting triangle. A blocking mechanism is set above the lifting needle triangle. The blocking mechanism includes a needle-concealing plate and a fixing part, wherein the needle-concealing plate is set parallel to the lifting needle inclined surface. The jacquard needle has a main closing tooth and a needle heel. A notch is formed between the main closing tooth and the needle heel. The length of the needle heel is less than or equal to the vertical distance between the concealed needle guard and the lifting needle slope. When the jacquard needle is in the concealed needle state, the needle heel is blocked by the blocking mechanism.

[0006] In the aforementioned anti-needle slippage device, the blocking mechanism blocks the heel of the jacquard needle in the hidden needle position, ensuring that the jacquard needle is accurately intercepted by the blocking mechanism when it moves outward under the action of centrifugal force in the middle position, thus avoiding needle slippage caused by centrifugal force.

[0007] In one possible embodiment, the lifting triangle further includes a retraction ramp extending in the direction of syringe rotation to retract the jacquard needle back to the bottom of the syringe needle groove.

[0008] In one possible embodiment, a back plate is provided on the outer side of the lifting pin triangle, and the top of the back plate has a plane parallel to the inclined surface of the lifting pin. The fixing part of the blocking mechanism is fixed to the plane by screws.

[0009] Based on the above embodiments, the backplate is fixed with screws to ensure the installation accuracy of the barrier mechanism and avoid displacement deviation caused by long-term vibration.

[0010] In one possible embodiment of the first aspect, the front end of the needle guard has a guide surface that extends the jacquard needle toward the syringe barrel.

[0011] Based on the above embodiments, the design of the guide surface allows the jacquard needles entering the needle hiding position to be smoothly blocked by the guarding device and thus enter the inner arc surface of the needle hiding plate, thereby preventing them from colliding with the guarding device.

[0012] Furthermore, the thickness of the needle-concealing plate is slightly less than the height of the notch.

[0013] Based on the above embodiments, the needle-concealing baffle of this application can be adapted to the notch and will not rub against the heel of the jacquard needle during lifting.

[0014] This application provides an anti-needle slippage device for jacquard needles in a concealed-needle sock knitting machine. By setting a blocking mechanism in conjunction with the device, the jacquard needles are kept close to the needle barrel during the needle-carrying process, thus preventing needle slippage. Simultaneously, corresponding notches are provided on the jacquard needles to correspond with the blocking mechanism, allowing the jacquard needles to be smoothly lifted along the inclined surface of the lifting triangle during the jacquard process. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the assembly structure of the needle lifting triangle and blocking mechanism of the anti-needle slippage device for the jacquard needles of a concealed needle knitting machine according to an embodiment of this application. Figure 2 This is a schematic diagram of the structure of the jacquard needle in the anti-needle slippage device of the jacquard needle of the concealed needle type sock knitting machine provided in an embodiment of this application; Figure 3This is an assembly diagram of an anti-needle slippage device for jacquard needles of a concealed needle knitting machine according to an embodiment of this application; Figure 4 This is a schematic diagram of the blocking mechanism provided in one embodiment of this application; Figure 5 This is a schematic diagram of the trajectory of the jacquard needle heel running in the lifting triangle and the blocking mechanism according to an embodiment of this application; Figure 6 This is a schematic diagram of a jacquard needle heel being protected by a lifting triangle and a blocking mechanism in a concealed state, according to an embodiment of this application. Among them, 1. syringe; 2. knitting assembly; 3. needle lifting triangle; 4. blocking mechanism; 5. needle lifting channel; 210. Jacquard needle; 220. Bottom needle; 230. Knitting needle; 240. Needle selector; 211. Tooth for closing the needle; 212. Needle heel; 213. Notch; 250. Pull-down triangle; 3a. Lifting bevel; 3b. Retraction bevel; 401. Hidden needle guard; 402. Fixing part. Detailed Implementation

[0017] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0018] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0019] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0020] It should be noted that although the jacquard pieces used in common sock knitting machines do not have hooks and do not directly participate in knitting, they are generally referred to as "jacquard needles" in actual production applications. Therefore, their foot, tooth, and heel are also commonly referred to as needle foot, tooth, and heel, respectively. The "needle slippage" mentioned in this application refers to the jacquard piece (needle) accidentally slipping upwards when it should not be involved in jacquard knitting, thereby pushing out the corresponding knitting needle, causing the knitting needle to snag on the yarn, thus creating a jumbled pattern.

[0021] In the jacquard knitting process of sock knitting machines, taking the SGE9608-C sock machine as an example, the heel of the jacquard needle has three position states during the knitting operation. The first state: The jacquard needles that do not participate in jacquard are pulled out by the pull-down triangle and then pressed back to the bottom of the needle groove by the needle selector. Their needle heels are in their original positions at the bottom and will not touch the lifting slope of the jacquard triangle. They pass smoothly along the trajectory of the inner arc surface of the jacquard triangle.

[0022] The second state: After the jacquard needles involved in jacquard are pulled out by the pull-down triangle, they are not pressed back to the bottom of the needle groove by the needle selector. They maintain the outward-curving state of the needle heel. When they touch the lifting slope of the jacquard triangle, the lifting operation is completed.

[0023] The third state (i.e., the hidden needle state described in this application): after the jacquard triangle is raised in the previous path, the jacquard needle cannot return to the bottom position. Its needle heel is in the middle position of the jacquard triangle, which is the hidden needle state. Its needle heel should not stick out and touch the lifting slope of the jacquard triangle. It can only pass smoothly along the inner arc surface of the jacquard triangle.

[0024] In existing jacquard knitting techniques, the heel of the jacquard needle in the concealed position is in a neutral, intermediate position relative to the jacquard triangle, and the movement trajectories of the heels in the concealed and active positions intersect and conflict. If a barrier is directly placed at the heel of the concealed needle, it will inevitably obstruct the movement of the jacquard needle on the lifting ramp of the jacquard triangle. Therefore, when the concealed jacquard needle moves from the pull-down triangle to the lifting ramp, its heel is completely unprotected. Due to the lack of an effective barrier, the tail of the concealed jacquard needle, under the centrifugal force generated by the rotating cylinder, can easily be thrown outwards. Once the heel of the concealed jacquard needle is thrown outwards, its lower end will be rapidly lifted upon contact with the lifting ramp of the jacquard triangle, causing the corresponding needle to snag the yarn and resulting in a messy pattern on the knitted socks.

[0025] To prevent the aforementioned pattern scrambling during the knitting process of a sock knitting machine, a common solution is to increase the curvature of the jacquard needles. This increases the friction within the needle groove to counteract the centrifugal force generated by high-speed rotation. However, this method not only increases the resistance of the knitting machine during operation, thus increasing energy consumption, but also, because the curvature of the jacquard needles is entirely controlled manually, it is easy to set it too high or too low. If the curvature is set too high, the friction within the needle groove is excessive, affecting the machine's speed. Conversely, if the curvature is set too low, or if it gradually decreases due to friction during machine operation, needle slippage can still occur intermittently. Therefore, this solution is unreliable. Furthermore, during the knitting process, centrifugal force increases with rotational speed. Therefore, the faster the speed, the more prone the pattern scrambling becomes, preventing the machine from operating at its maximum set speed and thus affecting knitting efficiency.

[0026] To address the issues raised above, the following will combine... Figures 1 to 6 This application describes an anti-needle slippage device for jacquard needles in a concealed needle type sock knitting machine, as provided in an embodiment of the present application.

[0027] like Figures 1 to 4 As shown, this embodiment provides an anti-needle slippage device for jacquard needles in a concealed-needle sock knitting machine, which can be divided into four main parts: Rotatable syringe 1, knitting assembly 2, lifting triangle 3, and blocking mechanism 4. First see Figure 1 This paper illustrates an assembly structure of a needle-lifting triangle and a blocking mechanism provided in an embodiment of this application. The blocking mechanism 4 is disposed above the needle-lifting triangle 3, and a needle-lifting channel 5 is formed between the blocking mechanism 4 and the needle-lifting triangle 3.

[0028] The needle lifting channel 5 is formed by the gap between the lower side of the blocking mechanism and the inclined surface of the needle lifting triangle. The vertical distance of this gap should be greater than or equal to the heel length of the jacquard needle.

[0029] Next, see Figure 2 The syringe 1 has several needle selectors 240 evenly arranged around its circumference.

[0030] The knitting assembly 2 includes a plurality of jacquard needles 210 corresponding to the needle selector 240. The jacquard needles 210, the bottom needles 220 and the knitting needles 230 are arranged sequentially from bottom to top. The jacquard needles have a total closing tooth 211 and a needle heel 212. A notch 213 is formed between the total closing tooth 211 and the needle heel 212. The needle selector 240 is provided on the outside of the jacquard needles. The needle selector 240 is used to push the jacquard needles into the needle groove of the needle cylinder. The bottom of the jacquard needles is provided with a pull-down triangle 250 for pulling the jacquard needles 210 out of the needle groove of the needle cylinder. See Figure 3 Each jacquard needle 210 includes a main cutting tooth 211, a needle heel 212, and a notch 213 between the main cutting tooth 211 and the needle heel 212. In a preferred embodiment, one tooth can be removed from the original jacquard needle to form the notch 213. The first tooth above the notch 213 serves as the main cutting tooth 211, and the notch 213 is below the needle heel 212.

[0031] See also Figure 1 The lifting triangle 3 has a pull-down triangle 250 spaced apart from it on one side. A needle-blocking plate is also provided next to the pull-down triangle 250, which is not shown in the figure. The lifting triangle includes a lifting slope 3a and a blocking slope 3b. The lifting slope 3a is an upwardly extending inclined surface used to move the jacquard needle upward along the slope. The end of the blocking slope 3b is an inclined surface extending inward towards the inside of the syringe barrel, so that after the heel of the jacquard needle moves to the inclined surface, the jacquard needle can be blocked back to the inner arc surface of the lifting triangle along the inclined surface.

[0032] A back plate is fixedly connected to the back of the lifting triangle 3. The back plate has an inclined surface with the same angle as the lifting angle 3a. A blocking mechanism 4 is fixed on this inclined surface. (See figure) Figure 4 The blocking mechanism 4 includes a hidden needle guard plate 401 disposed above and parallel to the lifting needle inclined surface 3a, and a fixing part 402 connected to the back plate. The hidden needle guard plate 401 and the lifting needle inclined surface 3a form a lifting needle channel. The end of the hidden needle guard plate forms a single end for guiding the jacquard needle 210 into the blocking mechanism to prevent the jacquard needle from colliding with the needle. At the same time, the maximum width of the hidden needle guard plate in the vertical direction is the same as or slightly greater than the heel length of the jacquard needle, so that the hidden needle guard plate can protect the heel of the jacquard needle throughout the process of the jacquard needle running in the blocking mechanism.

[0033] This application provides a blocking mechanism in the gap area on the running trajectory of the jacquard needle. The tip of the blocking mechanism is provided with a needle-blocking surface, which can effectively protect the needle heel so that it can slide smoothly into the protected arc surface and avoid collision.

[0034] The following is combined with Figure 5 and Figure 6 This application provides a further explanation of the operation process and structure of an anti-needle slippage device for jacquard needles in a concealed-needle sock knitting machine.

[0035] When the jacquard needle pulled out by the down triangle is selected by the needle selector; The needle selector pushes the jacquard needles that do not need to be lifted into the bottom of the needle groove of the syringe. The jacquard needles that are not in the needle groove contact the lifting bevel of the jacquard triangle as the syringe rotates.

[0036] As the jacquard needle rises along the slope: The notch area ensures that the needle heel is always on the lifting slope and is not interfered with by other structures.

[0037] In a preferred embodiment, the bottommost tooth of all the jacquard needles is removed. This bottommost tooth was originally used as the main closing tooth; after removal, the main closing tooth moves upward, forming the main closing tooth of the jacquard needle in the above-described scheme of this application. The jacquard needle after removing one tooth has a notch. When it moves and rises along the jacquard triangle, a spiral-shaped gap with a parallelogram cross-section is formed at the uppermost edge of the needle heel, parallel to the first inclined surface of the jacquard triangle. The cross-sectional shape of this gap is consistent with the shape of the notch formed after removing one tooth from the jacquard needle. Figure 5 As shown.

[0038] Further reference Figure 6 When the spiral gap intersects with the movement trajectory of the jacquard needle heel in the hidden needle position, a parallelogram-like blocking area is formed. A needle-blocking plate is set in this blocking area to block the needle heel in the hidden needle position.

[0039] The lower end of the heel (point A in the diagram) first contacts the bottom of the concealed needle guard (point C). As the jacquard needle moves horizontally, the upper end of the heel (point B in the diagram) leaves the top of the concealed needle guard (point D). When the upper end of the heel (point B) leaves the top of the concealed needle guard (point D), the lower end of the heel (point A) enters the inner arc surface of the jacquard triangle. The jacquard needle's radial displacement is always restricted by the side of the concealed needle guard.

[0040] At high speed: centrifugal force attempts to cause the jacquard needle at the hidden needle position to deflect radially, which may cause needle slippage. At this time, the needle heel immediately contacts the guide surface of the hidden needle baffle, and the hidden needle baffle prevents the jacquard needle from deflecting.

[0041] When the heel of the jacquard needle in the concealed position reaches the concealed needle guard, the lower end of the heel (point A) begins to enter the inner arc surface of the concealed needle guard from the lower end (point C). The curvature of this inner arc surface is consistent with the inner arc curvature of the jacquard triangle. During the movement, the guard plate blocks the heel from the lower end (point A) and gradually extends to block the entire heel, up to the upper end (point B) of the guard plate, where the heel is protected by the guard plate.

[0042] Then, the lower end of the needle heel (point A) begins to detach from the inner arc surface of the hidden needle guard, gradually reducing the area protected by the guard until the upper end of the needle heel (point B) slides out from the upper end D of the hidden needle guard and is no longer protected. However, when the upper end of the needle heel (point B) slides out from the upper end D of the hidden needle guard, it is exactly when the lower end of the needle heel (point A) enters the inner arc surface of the jacquard triangle. Therefore, the jacquard needle can continue to be effectively protected. That is, during each round of knitting, the jacquard needle will not accidentally jump upward due to centrifugal force.

[0043] In practical applications, to ensure that the needle heel and the blocking mechanism do not rub against each other at the needle lifting position, the length of the needle heel is generally set slightly less than the vertical height of the needle lifting channel. When the heel of the jacquard needle is in the concealed position, when the upper end of the needle heel (point B) leaves the upper end of the concealed needle guard plate (point D), the lower end of the needle heel (point A) cannot immediately enter the inner arc surface of the jacquard triangle. There will be a very small gap. However, this gap is very small. If the gap is set to 0.5mm, at a rotation speed of 300 revolutions per minute, the jacquard needle will pass through this gap in 0.00053 seconds.

[0044] The jacquard needle pops out due to centrifugal force, a gradual and cumulative process, though it happens very quickly. This is because the jacquard needle has a certain degree of bending friction within the needle groove, preventing it from popping out suddenly. In other words, within this 0.00053 seconds, if the needle heel shows any tendency to pop out, it is immediately stopped by the inner arc surface of the jacquard triangle and will not pop out further.

[0045] In the above embodiments, the anti-needle slippage device for jacquard needles in a concealed-needle sock knitting machine provided in this application achieves a reliable anti-needle slippage effect during high-speed operation through an innovative structural design. The wedge-shaped fit between the needle heel and the blocking surface generates a radial restraint force, thereby preventing needle slippage during high-speed operation of the sock knitting machine. Simultaneously, the blocking device and the jacquard needle body ensure needle posture stability through a contact-type blocking design.

[0046] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A device for preventing needle slippage in jacquard needles of a concealed-needle sock knitting machine, comprising: A syringe (1) having several needle grooves distributed circumferentially; a knitting assembly (2) and a lifting triangle (3) arranged around the syringe (1), the knitting assembly including a jacquard needle (210), a bottom needle (220), and a knitting needle (230) arranged sequentially from bottom to top, the jacquard needle (210) being lifted upwards by the lifting slope (3a) of the lifting triangle (3), characterized in that it further includes: An obstruction mechanism (4) is provided above the lifting needle triangle (3). The obstruction mechanism (4) includes a needle-concealing plate (401) and a fixing part (402). The needle-concealing plate (401) is arranged parallel to the lifting needle inclined surface (3a). The jacquard needle (210) has a main closing tooth (211) and a needle heel (212). A notch (213) is formed between the main closing tooth (211) and the needle heel (212). The length of the needle heel (212) is less than or equal to the vertical distance between the needle concealment plate (401) and the needle lifting slope (3a). When the jacquard needle is in the concealed state, the needle heel (212) is blocked by the blocking mechanism (4).

2. The anti-spin shifting device according to claim 1, characterized in that, The lifting triangle (3) also includes a retraction slope (3b), which extends toward the syringe (1) to retract the jacquard needle (210) back to the bottom of the needle groove of the syringe (1).

3. The anti-spin-shifting device according to claim 2, characterized in that, A back plate is provided on the outside of the lifting triangle (3), and the top of the back plate has a plane parallel to the lifting inclined surface (3a). The fixing part (402) of the blocking mechanism (4) is fixed on the plane by screws.

4. The anti-spin-shifting device according to claim 3, characterized in that, The front end of the needle guard plate (401) has a guide surface that extends the jacquard needle (210) in the rotation direction of the syringe (1).

5. The anti-spin shifting device according to claim 4, characterized in that, The maximum vertical height of each vertical section between the needle-concealing plate (401) and the needle-lifting triangle is less than the height of the notch (213).

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