Jacquard doup mechanism

Abstract

The utility model relates to the technical field of jacquard leno healds, in particular to a jacquard leno heald mechanism which comprises two first healds and a second heald, a connecting part is arranged in the middle of each first heald and provided with a vertical guide channel, a yarn guide hole is formed in the top of each second heald, and two sides of each second heald extend downwards to form a downward U-shaped structure. The lower ends of the two sides of the second heald respectively penetrate through the guide channels of the first heald, outward annular bulges are arranged on the second heald on the two sides of the yarn guide hole, and the annular bulges protrude out of the surface of the second heald. According to the jacquard doup mechanism provided by the utility model, the annular bulge is arranged in the yarn guide hole to reduce the pressure between the yarn and the connecting part of the first heald in the yarn feeding and discharging processes, so that the friction force is reduced, and the abrasion is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of jacquard leash heddle, in particular to a jacquard leash heddle mechanism. Background Art

[0002] Currently, thong technology for coarse yarns is largely mature, as demonstrated by the use of thong jacquard weaving technology for chemical fibers such as shoe uppers. However, thong jacquard weaving technology for fine yarns still presents challenges, such as heald wear. This is particularly true for raw silk, which has a surface coating of sericin. When the heald is thonged, friction due to compression and friction between the healds and the silk can easily cause wear, impacting the proper functioning of the equipment.

[0003] Chinese patent application No. 2024222475327 discloses a method for reducing the thickness of the first heald above the connecting portion to reduce friction and wear between the yarn and the first heald. However, the connecting portion of the first heald is relatively thick. After the yarn passes through the yarn guide hole of the second heald, it will generate significant friction between the connecting portion of the first heald, causing wear on the first heald and easily causing the yarn passing through the yarn guide hole to break, affecting the performance of the equipment. Utility Model Content

[0004] In order to solve the above technical deficiencies, the utility model provides a jacquard twirling heald mechanism, which can effectively reduce the wear of the connecting portion of the first heald by the yarn passing through the second heald.

[0005] The utility model discloses a jacquard heald mechanism, comprising two first healds and one second heald, wherein the middle portion of the first heald is a connecting portion, a vertical guide channel is provided on the connecting portion, a yarn guide hole is provided on the top of the second heald, both sides of the second heald extend downward to form a downward U-shaped structure, the lower ends of both sides of the second heald respectively pass through a guide channel of the first heald, and outward annular protrusions are provided on the second heald on both sides of the yarn guide hole, and the annular protrusions protrude from the surface of the second heald.

[0006] An arcuate portion is provided on the inner side of the connecting portion of the first heald, and outwardly directed arcuate recesses are provided in the downwardly extending portions on both sides of the second heald. When the first heald is raised or lowered, the side walls of the guide channel of the connecting portion fit into contact with the inner side of the downwardly extending portion of the second heald. When the guide channel of the first heald passes through the arcuate recess, the arcuate portion on the connecting portion of the first heald corresponds in height to the annular protrusion on the second heald, and there is no interference between the two.

[0007] The specific principle of twirling: On a twirling shuttle loom, the complex action of twirling warp and weft yarns, as well as warp yarns themselves, is involved. Only when the second heddle reaches the center of the first heddle can the warp yarns of the fancy heddle slide smoothly from the inner upper inclined surface of the first heddle along the outer arc of the second heddle's upper side to below the twirled warp yarns in the second heddle's yarn guide hole, completing the twirling of the fancy heddle warp yarns with the twirled warp yarns. Therefore, the arc-shaped portion must be designed to ensure that the raised portion of the first heddle does not interfere with the annular raised portion of the second heddle during the lifting and lowering of the first heddle, thus preventing friction.

[0008] The jacquard twirling heald mechanism obtained by the utility model is provided with an annular protrusion on the yarn guide hole to reduce the pressure between the yarn and the connecting part of the first heald during the yarn feeding and yarn discharging process, thereby reducing friction and reducing wear. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is the structural front view of the utility model;

[0010] Figure 2 for Figure 1 A partial enlarged schematic diagram;

[0011] Figure 3 This is a structural cross-sectional view of the yarn guide hole of the present invention;

[0012] Figure 4 It is a structural stereogram of the utility model;

[0013] Figure 5 for Figure 4 A partial enlarged view of

[0014] Figure 6 This is a schematic diagram of the state when the second heald of the present invention moves to the bottom;

[0015] Figure 7 for Figure 6 A partial enlarged schematic diagram;

[0016] Figure 8 This is a schematic diagram of the state when the arc-shaped portion of the first heald of the present invention passes through the annular protrusion;

[0017] Figure 9 for Figure 8 A partial enlarged schematic diagram. DETAILED DESCRIPTION

[0018] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the following is a detailed description of the specific implementation method, structure, characteristics and effects of the present invention in combination with the accompanying drawings and preferred embodiments.

[0019] Example 1:

[0020] like Figures 1-9 As shown, the utility model discloses a jacquard twirling heald mechanism, comprising two first healds 1 and a second heald 2, the middle portion of the first heald 1 being a connecting portion 3, the connecting portion 3 being provided with a vertical guide channel 8, the top of the second heald 2 being provided with a yarn guide hole 5, both sides of the second heald 2 extending downward to form a downward U-shaped structure, the lower ends of both sides of the second heald 2 respectively passing through a guide channel 8 of the first heald 1, and outward annular protrusions 6 being provided on the second heald 2 on both sides of the yarn guide hole 5, the annular protrusions 6 protruding from the surface of the second heald 2.

[0021] The second heald 2 has a downward-facing U-shaped structure and passes through the guide channel 8 of the connecting portion 3 of the first heald 1. During operation, the two healds move relative to each other, so the thickness of the second heald 2 is smaller than that of the connecting portion 3 of the first heald 1. Because the yarn 4 passing through the yarn guide eyelet 5 is fed from one side of the first heald 1 and discharged from the other side of the first heald 1, a small angle is formed between the yarn 4 and the first and second healds 1 and 2. Due to the smaller thickness of the second heald 2, the yarn 4 contacts the connecting portions 3 of the first and second healds 1 and 2, creating a large angle and generating high tension. As the yarn 4 continues to be fed forward, it rubs against the connecting portions 3 of the first and second healds 1 and 2, causing wear and tear, which can form notches. These notches can easily cause yarn 4 to break. This solution provides an annular protrusion 6 on the second heald 2 at the yarn guide hole 5, thereby increasing the length of the yarn guide hole 5, and can also be considered to increase the thickness of the second heald 2 at the yarn guide hole 5. In this way, when the yarn 4 enters the yarn guide hole 5 from the side of the first heald 1 and is output from the yarn guide hole 5 to the side of the first heald 1, the angle of the yarn 4 between the yarn guide hole 5 and the connecting portion 3 of the first heald 1 can be effectively reduced. In this way, the pressure on the connecting portion 3 of the first heald 1 can be reduced, and the friction force can also be reduced, thereby reducing the wear on the connecting portion 3 of the first heald 1. In fact, when the height of the annular protrusion 6 protruding from the second heald 2 reaches a certain value, the yarn 4 can avoid contact with the connecting portion 3 of the first heald 1 when entering the yarn guide hole 5 and outputting from the yarn guide hole 5, thereby preventing the connecting portion 3 of the first heald 1 from being worn. Of course, the provision of the annular protrusion 6 will increase the friction between the yarn 4 and the annular protrusion 6 when the yarn 4 enters and exits the yarn guide hole 5, so the annular protrusion 6 needs to be made of a wear-resistant material, such as ceramic, stainless steel, tungsten steel, etc., preferably ceramic. The annular protrusions 6 on both sides of the second heald 2 pass through the yarn guide hole 5 to form an integrated structure, which is a hollow cylindrical structure, such as a ceramic ring. The setting of the sum of the thickness of the two annular protrusions 6 and the second heald 2 can be set according to actual needs, as long as the adjacent jacquard heald mechanisms do not interfere with each other during the lifting and lowering process due to the annular protrusions 6. Generally, the annular protrusion 6 is flush with or slightly indented in the thickness direction of the connecting portion 3 of the first heald 1.

[0022] An arcuate portion 7 is provided on the inner side of the connecting portion 3 of the first heald 1, and outwardly directed arcuate recesses 9 are provided in the downwardly extending portions on both sides of the second heald 2. When the first heald 1 is raised or lowered, the side walls of the guide channel 8 of the connecting portion 3 fit in contact with the inner side of the downwardly extending portion of the second heald 2. When the guide channel 8 of the first heald 1 passes through the arcuate recesses 9, the arcuate portion 7 on the connecting portion 3 of the first heald 1 corresponds in height to the annular protrusion 6 on the second heald 2, and there is no interference between the two.

[0023] During normal operation of the leash mechanism, the first heald 1 alternately rises and falls relative to the second heald 2. During this normal lifting process, the inner side of the first heald 1 rises and falls along the inner wall of the second heald 2. Since the thickness of the second heald 2 is uniform and there is no annular protrusion 6, the first heald 1 can rise and fall straight along the second heald 2. At the uppermost position, the second heald 2 contracts inward, causing the first heald 1 to move inward. However, in this solution, due to the provision of the annular protrusion 6, in order to prevent the arc-shaped portion 7 of the first heald 1 from interfering with the annular protrusion 6 on the second heald 2 when the first heald 1 is raised or lowered, thereby generating friction, an outward arc-shaped recess 9 is provided on the downwardly extending portion of the second heald 2. Therefore, when the connecting portion 3 corresponding to the guide channel 8 of the first heald 1 passes through the arc-shaped recess 9 during the raising and lowering process, the connecting portion 3 moves outward along the arc-shaped recess 9 by a certain distance. At this time, the arc-shaped portion 7 on the connecting portion 3 of the first heald 1 just bypasses the annular protrusion 6. In this way, the first heald 1 will not interfere with the annular protrusion 6 when it is raised or lowered, that is, there will be no wear between the first heald 1 and the annular protrusion 6, thereby improving the service life of the first heald 1.

[0024] The size and position of the arc-shaped concave 9 can be set according to the size of the annular protrusion 6 so as to ensure that the arc-shaped portion 7 on the connecting portion 3 of the first heald 1 does not interfere with the annular protrusion 6 during the lifting process, and are not specifically limited.

[0025] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0026] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to the interaction between two elements. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0027] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0028] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simplified modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A jacquard leash mechanism comprising two first healds and one second heald, wherein the middle portion of the first heald is a connecting portion, the connecting portion being provided with a vertical guide channel, the top of the second heald being provided with a yarn guide hole, and both sides of the second heald extending downward to form a downward U-shaped structure, wherein the lower ends of the two sides of the second heald respectively pass through a guide channel of a first heald, wherein the mechanism is characterized by: Outward annular protrusions are provided on the second heddle on both sides of the yarn guide hole, and the annular protrusions protrude from the surface of the second heddle.

2. A jacquard lenohed mechanism according to claim 1, characterized in that: An arcuate portion is provided on the inner side of the connecting portion of the first heald, and outwardly directed arcuate recesses are provided in the downwardly extending portions on both sides of the second heald. When the first heald is raised or lowered, the side walls of the guide channel of the connecting portion fit into contact with the inner side of the downwardly extending portion of the second heald. When the guide channel of the first heald passes through the arcuate recess, the arcuate portion on the connecting portion of the first heald corresponds in height to the annular protrusion on the second heald, and there is no interference between the two.

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