Wear-resistant lifting heald thread and leno heald structure for leno fabric

Abstract

The utility model relates to a leno heald device for a weaving machine, in particular to a wear-resistant lifting heald thread and a leno heald structure for leno fabrics, the lifting heald thread comprises an upper driving part and a lower driving part, and the upper driving part and the lower driving part are connected through a transition part; the surface of the transition part is covered with a wear-resistant layer so as to prevent wear when the weaving threads move in a manner of attaching to the surface of the transition part. The leno heald structure comprises half healds and the lifting heald lines, the lifting heald lines are arranged in pairs, and the half healds are arranged between the lifting heald lines on the two sides; the lifting heald threads on the two sides are lifted alternately, so that the weaving threads can cross the top of the half heald, the weaving threads are pushed alternately to move on the left side and the right side of the half heald, and twisting of the weaving threads is achieved. The wear-resistant layer is attached to the surface of the plastic material of the lifting heald wire, so that the wear resistance of the lifting heald wire is improved, the service life is prolonged, frequent replacement is avoided, and the wear-resistant layer adopts a metal sheet with a smooth surface, so that a woven wire is prevented from being damaged.

Description

Technical Field

[0001] The utility model relates to a heald device for a loom, in particular to a wear-resistant lifting heald wire and heald structure for leno fabrics. Background Art

[0002] Leno is an ancient manufacturing process. The leno process organization has a special law of interweaving of warp and weft. Fabrics formed entirely or partially by the special process of strip-shaped twisted warp leno organization have obvious different characteristics from other various fabrics. The surface of the fabric has clearly and evenly distributed obvious yarn holes, with relatively small warp and weft densities, light texture, stable organizational structure, good air permeability, and strong three-dimensional sense.

[0003] In the traditional method of producing a leno product, a wire heald is made by manually winding the wire, and combined with an ordinary loom, the twisted warp and ground warp are woven back and forth to produce a simple one-twist-one-ground leno fabric. During the operation process, it is necessary to twist the wire heald back and forth by hand. If the operation is improper, it is easy to cause the wire body to break, and it is necessary to stop the machine to repair the wire heald and then produce again, with low efficiency and great room for improvement in the finished product grade.

[0004] Currently, a type of heald device in use includes two lifting heald wires and heald halves that cooperate with the lifting heald wires. The heald halves pass through the first warp thread through the heald eyes on the surface. The two lifting heald wires on both sides respectively cooperate with one leg (arm) of the heald half to lift the second warp thread. Each lifting heald wire is driven by a corresponding driving element of the loom frame or loom box, so that the two lifting heald wires on both sides alternately lift and move, alternately changing the relative position of the second warp thread and the first warp thread, and winding around each other to form a so-called heald fabric or leno fabric.

[0005] In the heald device, the lifting heald wires are generally made of plastic materials, while the healds are generally made of steel. During the operation of the device, the distance between the lifting heald wires is close, and the plastic lifting heald wires often collide with the first warp thread or the second warp thread, which is easy to wear, shortening the service life of the lifting heald wires and requiring frequent replacement. Moreover, the damaged surface will also scrape the first warp thread or the second warp thread, resulting in damage and reducing the quality of the leno products.

[0006] Based on the problems in the prior art, the utility model provides a wear-resistant lifting heald wire and heald structure for leno fabrics. Summary of the Utility Model

[0007] The purpose of the utility model is to provide a wear-resistant lifting heald wire and heald structure for leno fabrics to solve the technical problem that the plastic lifting heald wires are easy to wear when colliding with the weaving threads in the prior art.

[0008] The technical solution of the present utility model is: an abrasion-resistant lifting heddle for leno fabric, including an upper driving part and a lower driving part, and the upper driving part and the lower driving part are connected through a transition part; the surface of the transition part is covered with an abrasion-resistant layer to prevent abrasion when the weaving thread moves along the surface of the transition part.

[0009] Preferably, the abrasion-resistant layer is set as a smooth-surface metal sheet and is shaped to fit the segment of the transition part it covers.

[0010] Preferably, the abrasion-resistant layer and the transition part are fixedly connected by ultrasonic welding.

[0011] Preferably, at least two assembly holes are provided on the transition part, and needle-shaped structures are formed at the ends of the abrasion-resistant layer and are buckled into the assembly holes by bending.

[0012] Preferably, the abrasion-resistant layer and the segment of the transition part it covers are adhesively connected.

[0013] The present application also provides a dobby structure, including healds, and the aforementioned lifting heddles. The lifting heddles are arranged in pairs, the healds are placed between the two lifting heddles on both sides, and the two lifting heddles on both sides are alternately lifted and lowered;

[0014] The healds include a heddle line part with heddle eyes and connecting arms connected to both sides of the heddle line part, and sliding channels for the connecting arms to fit and slide are provided on the transition part.

[0015] Compared with the prior art, the advantages of the present utility model are:

[0016] (1) In the present utility model, an abrasion-resistant layer is provided on the surface of the plastic material of the lifting heddle to improve the abrasion resistance of the lifting heddle, extend the service life, and avoid frequent replacement.

[0017] (2) The abrasion-resistant layer is a smooth-surface metal sheet, such as a smooth-surface iron sheet, which not only improves the abrasion resistance but also avoids damaging the weaving thread and prevents affecting the appearance of the leno product. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present utility model will be further described below in conjunction with the drawings and embodiments:

[0019] Figure 1 It is a schematic structural diagram of a single lifting heddle provided by the present utility model;

[0020] Figure 2 It is a partial structural schematic diagram of the abrasion-resistant layer and the lifting line part of the present utility model fixedly connected by assembly holes;

[0021] Figure 3 It is a partial structural schematic diagram of the abrasion-resistant layer and the lifting line part of the present utility model shaped to fit;

[0022] Figure 4 Schematic structural diagram of the heddle structure provided by the present utility model;

[0023] Figure 5 Provided by the present utility model Figure 4 Partial enlarged schematic diagram of the section of the lifting line part;

[0024] Wherein: 1. Upper driving part; 2. Lower driving part; 3. Transition part; 4. Wear-resistant layer; 5. Assembly hole; 6. Half heddle; 30. Lifting line part; 31. Sliding channel; 60. Heddle eye; 61. Heddle line part; 62. Connecting arm. Specific embodiments

[0025] The following combines specific embodiments to further elaborate on the content of the present utility model:

[0026] As Figure 1 shown, a wear-resistant lifting heddle line for leno fabric includes an upper driving part 1 and a lower driving part 2, and the upper driving part 1 and the lower driving part 2 are connected by a transition part 3.

[0027] The upper driving part 1, the lower driving part 2 and the transition part 3 are all made of solid non-magnetic materials taking polymer materials as an example, such as synthetic polymers taking thermosetting or thermoplastic polymers as an example, such as polyethylene, polypropylene, or carbon-reinforced polyethylene, carbon-reinforced polypropylene, ABS, polycarbonate, etc.

[0028] The upper driving part 1 can be made of the same material as the lower driving part 2. Preferably, the upper driving part 1, the lower driving part 2 and the transition part 3 are injection-molded into a single entity.

[0029] The upper driving part 1 and the lower driving part 2 are respectively connected to a driving member, and under the action of the driving member, the whole lifting heddle line is driven to move up or down; the driving member can use any suitable driving element, such as the driving mechanism described in EP371257 to drive the lifting heddle line. Or, the driving mechanism disclosed in EP772703 can be used to move the lifting heddle line up and down. As other alternative options, the driving member in the field of the present application can be installed on the heddle frame of the loom.

[0030] Refer to the attached Figure 2 Combined with the attached Figure 3 shown, the transition part 3 is used to connect the upper driving part 1 and the lower driving part 2, and a wear-resistant layer 4 is covered on the surface of the transition part 3 to prevent wear when the woven thread moves along the surface of the transition part 3.

[0031] Refer to the attached Figure 3 , the wear-resistant layer 4 is set as a smooth metal sheet and is shaped to fit the section of the covered transition part 3.

[0032] There are many ways to fixedly connect the wear-resistant layer 4 and the transition part 3. For example, adhesive connection or ultrasonic welding can be used for fixed connection. Considering that the surface of the wear-resistant layer 4 contacts the warp threads, to avoid damage to the warp threads caused by scraping, the contact surface is smooth during installation and fixation.

[0033] In one embodiment, as shown in the appendix Figure 2 As shown, at least two assembly holes 5 are provided on the transition part 3. Needle-shaped structures are formed at the end of the wear-resistant layer 4 and are buckled into the assembly holes 5 by bending to achieve the fixed connection between the wear-resistant layer 4 and the transition part 3; in other embodiments, ultrasonic welding can also be used for fixed connection, which is faster, energy-saving and low-cost.

[0034] Referring to the appendix Figure 3 , a warp-thread lifting part 30 is formed inside the transition part 3. A section of V-shaped corner is formed on one side edge of the warp-thread lifting part 30. The V-shaped corner is an obtuse angle, and a chamfer is provided at the corner bending part. In the opening angle area of the V-shaped corner, the other side edge of the warp-thread lifting part 30 extends obliquely outwards to form a curved slope. As shown in the appendix Figure 3 As shown, the lifting harness is in the shape of a flat strip. The curved slope is located on the thickness plane. In the width direction of the flat strip, the bottom length of the curved slope corresponding to the opening angle is not less than half of the width of the corresponding cooperating half-harness. The open gap between the curved slope of the warp-thread lifting part 30 and the contour edge of the corresponding cooperating half-harness is configured to accommodate the warp threads to form a shed.

[0035] Referring to the appendix Figure 4 Combined with the appendix Figure 5 , the present application also provides a heddle structure, including half-harnesses and a wear-resistant lifting harness for leno fabrics provided above. The lifting harnesses are arranged in pairs. The half-harnesses 6 are placed between the two lifting harnesses on both sides, and the lifting harnesses in the same group are alternately lifted and lowered.

[0036] As shown in the appendix Figure 5 As shown, the half-harness 6 includes a harness part 61 having harness eyes 60 and connecting arms 62 connected to both sides of the harness part 61. A sliding channel 31 for the connecting arms 62 to fit and slide is provided on the warp-thread lifting part 30. The sliding channel 31 is arranged as a clamping cavity, and end holes (not shown in the drawings) communicating with the side part of the sliding channel 31 are provided for the connecting arms 62 to be accommodated and move.

[0037] Combined with the appendix Figure 5As shown in the figure, the process of the transition part 3 cooperating with the heddle 6 to achieve twisted yarn is as follows: Both sides of the connecting arm 62 are placed in the sliding channel 31. The lifting warp threads on one side are lifted, and the lifting warp threads on the other side descend. The lifting warp threads on the rising side move upward relative to the heddle part 61, compressing the space inside the shed on the corresponding side, driving the yarn to move upward. The lifting height is sufficient to pull and tilt the yarn and cross over the top of the heddle part 61 to reach the other side of the shed, realizing the change in the relative position of the yarn in the shed and the yarn in the heddle eye, and achieving twisting. Similarly, the lifting warp threads on the other side are lifted, and the lifting warp threads on the opposite side descend, and the yarn is again shifted to the shed on the opposite side, and so on. Therefore, the lifting warp threads on both sides alternately rise and fall to tighten or release the shed, enabling the yarn to cross over the top of the heddle part 61, thereby alternately pushing and shifting the yarn to move on both the left and right sides of the heddle 6, realizing twisted yarn.

[0038] The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose is to enable those who are familiar with this technology to understand the content of the present invention and implement it accordingly, and it cannot be used to limit the protection scope of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended to include all changes falling within the meaning and scope of the equivalent elements of the claims in the present invention.

Claims

1. A wear-resistant lifting heald for leno fabric, characterized in that: It comprises an upper driving part and a lower driving part, wherein the upper driving part and the lower driving part are connected by a transition part; At least the surface of the transition portion is covered with a wear-resistant layer to prevent wear when the yarn moves along the surface of the transition portion.

2. The wear-resistant lifting heald for leno fabric according to claim 1, characterized in that: The wear-resistant layer is configured as a metal sheet with a smooth surface and conforms to the segment of the transition portion covered.

3. The wear-resistant lifting heald for leno fabric according to claim 2, characterized in that: The wear-resistant layer and the transition portion are fixedly connected by ultrasonic welding.

4. The wear-resistant lifting heald for leno fabric according to claim 2, characterized in that: At least two assembly holes are arranged on the transition part, and the end of the wear-resistant layer is formed with a needle-like structure, which is installed in the assembly hole by bending and buckling.

5. The wear-resistant lifting heald for leno fabric according to claim 2, characterized in that: The wear-resistant layer is adhesively connected to the covering segment of the transition portion.

6. A twisted heald structure, characterized in that: It comprises a half heald and the wear-resistant lifting healds according to any one of claims 1 to 5, wherein the lifting healds are arranged in pairs, the half heald is placed between the lifting healds on both sides, and the lifting healds on both sides are raised and lowered alternately; The half heddle comprises a heddle portion having a heddle eye and connecting arms connected to both sides of the heddle portion, and the transition portion is provided with a sliding channel for the connecting arms to slide adapted thereto.

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