Reverse weft insertion rapier head
By designing the trans weft rapier head, the barb structure and guidance surface are used to ensure that the yarn does not flip, which solves the problem of flat structure plastic yarn turning in the production process, and improves production efficiency and weft quality.
Patent Information
- Application Number
- CN202421649151.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-12
- Publication Date
- 2025-04-15
- Estimated Expiration
- 2034-07-12
AI Technical Summary
During textile production, flat-structured plastic yarns may turn over due to clamping angle problems, resulting in production shutdown and affecting efficiency.
A trans-weft guide rapier head is designed, including a barb structure, the barb direction of the barb structure is upward relative to the spinning, and the yarn does not flip through the first and second guiding surfaces and smoothly enters the clamping surface.
It effectively avoids the problem of yarn flip, improves production efficiency, and ensures the quality of weft introduction.
Smart Images
Figure CN222758443U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a weft insertion rapier head. Background Art
[0002] The weft insertion rapier head is a tool used to lift the weft in the textile industry. On a loom, lifting the weft refers to leading the weft thread out of the weft cylinder (or weft cylinder shaft) and guiding the weft thread into the weaving parts through a rapier head (also called a rapier) and other devices to ensure the correct operation and tension control of the weft thread during the weaving process.
[0003] In the actual production process, there are many types of yarns being processed. One type of yarn is a flat plastic wire with a width of about 5 to 6 mm and a thickness of generally less than 1 mm. For this type of yarn, there may be a small probability that the yarn will flip upside down due to the clamping angle problem. In this case, the machine will need to be stopped to deal with the flipped yarn, affecting production efficiency. Utility Model Content
[0004] In order to solve the above problems, the utility model provides a reverse weft insertion rapier head, which can avoid the problem of yarn turning over during the production and processing of yarn.
[0005] A reverse weft insertion rapier head comprises a rapier shell and a yarn clamping rod, wherein the rapier shell comprises a base portion and a hook portion, a barb structure is arranged at the front end of the hook portion, and the yarn clamping rod is arranged in the rapier shell. When clamping the yarn, one end of the barb structure abuts against the inner wall of the barb structure, the barb structure is located above the center line of the rapier shell as a whole, and the barb direction of the barb structure is upward.
[0006] Furthermore, the barb structure includes a first guide surface arranged on the outer contact surface and a clamping surface arranged on the inner contact surface. The first guide surface has the first function of ensuring the original state of the yarn when the outer inclined surface first contacts the yarn to avoid changes in the direction of the yarn; the second function is to squeeze the yarn on the outer side of the barb, and enter the preset internal space of the sword according to the movement of the arc surface structure, and the clamping surface interacts with the yarn clamping rod to clamp the yarn.
[0007] Furthermore, the barb structure also includes a second guide surface, which is located at the upper end of the clamping surface. The second guide surface serves as the inner inclined surface of the barb to squeeze the yarn, and the yarn enters the interior of the barb structure according to the second guide surface and ensures that the yarn direction does not flip.
[0008] Furthermore, the first guide surface includes a front curved surface and a side inclined plane structure.
[0009] Furthermore, the second guiding surface is an inclined plane structure.
[0010] Furthermore, the angles between the inclined planes of the first guiding surface and the second guiding surface and the horizontal plane are 40° to 60°.
[0011] Furthermore, the clamping surface is a planar structure.
[0012] The utility model is beneficial in that:
[0013] Compared with the traditional weft insertion line, the direction of the barb structure of the hook head is usually downward relative to the yarn direction (inconsistent with the yarn inclination direction). The utility model adjusts the direction of the barb so that the direction of the barb is upward relative to the spinning. The first guide surface is similar to the yarn inclination angle, which guides the yarn. The second guide surface guides the yarn for a second time to ensure that the yarn does not turn over and smoothly enters the clamping surface. When the sword is connected, the outer shell of the sword is along the surface of the yarn, not against the surface of the yarn; when the yarn is introduced, the surface that guides the yarn enters the clamping mouth. After the yarn enters the clamping mouth, it is clamped by the yarn clamping rod to ensure that the yarn does not get loose or turn over, thereby ensuring the quality of the weft insertion. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 The utility model is a structural schematic diagram of a reverse weft insertion rapier head.
[0015] Figure 2 The utility model is a partial explosion schematic diagram of a hook head of a reverse weft insertion rapier head.
[0016] Figure 3 It is a structural schematic diagram of the front arc surface and the side plane of a reverse weft insertion rapier head of the utility model.
[0017] Reference numerals: barb structure 1 , yarn clamping rod 2 , base 3 , first guide surface 101 , second guide surface 102 , clamping surface 103 , front curved surface 201 , side inclined plane 202 . DETAILED DESCRIPTION
[0018] The technical solutions in the embodiments of the present utility model will be described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.
[0019] A reverse weft insertion rapier head comprises a rapier shell and a yarn clamping rod, the rapier shell comprises a base part and a hook part, the front end of the hook part is provided with a barb structure, the yarn clamping rod is arranged in the rapier shell, when clamping the yarn, one end of the barb structure is against the inner wall of the barb structure, the barb structure is located above the center line of the rapier shell as a whole, and the barb direction of the barb structure is upward. The barb structure comprises a first guide surface arranged on the outer contact surface and a clamping surface arranged on the inner contact surface, the first guide surface is used to guide the yarn to enter the inner side of the barb structure, and the clamping surface interacts with the yarn clamping rod to clamp the yarn. The barb structure also comprises a second guide surface, the second guide surface is located at the upper end of the clamping surface, and the second guide surface serves to guide the yarn to enter the inner side of the barb structure without turning over. The first guide surface is a structure comprising a front arc surface and a side inclined plane. The second guide surface is an inclined plane structure. The clamping surface is a plane structure. The angle between the inclined planes of the first guide surface and the second guide surface and the horizontal plane is 40° to 60°.
[0020] During actual use, when connecting the sword, the first guide surface faces the yarn along the inclination direction of the yarn, and can keep it from turning over during the process. When the yarn is guided to the edge of the first guide surface, the yarn enters the inner side of the hook structure along the second guide surface. The second guide surface also has an inclination angle similar to that of the yarn, which ensures that the yarn will not turn over when entering the second guide surface. Finally, the yarn enters the clamping surface along the inner side of the hook structure.
[0021] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is limited by the appended claims rather than the above description, and it is intended that all changes within the meaning and scope of the equivalent elements of the claims are included in the present invention.
Claims
1. A reverse weft insertion rapier head, characterized in that: It includes a sword-connecting shell and a yarn clamping rod. The sword-connecting shell includes a base part and a hook head part. The front end of the hook head part is provided with a barb structure. The yarn clamping rod is arranged in the sword-connecting shell. When clamping the yarn, one end part thereof abuts against the inner wall of the barb structure. The barb structure is located above the center line of the sword-connecting shell as a whole, and the barb direction of the barb structure is upward.
2. The reverse weft insertion rapier head according to claim 1, characterized in that: The barb structure comprises a first guide surface arranged on the outer contact surface and a clamping surface arranged on the inner contact surface. The first guide surface is used to guide the yarn to enter the inner side of the barb structure, and the clamping surface interacts with the yarn clamping rod to clamp the yarn.
3. The reverse weft insertion rapier head according to claim 2, characterized in that: The barb structure also includes a second guide surface, which is located at the upper end of the clamping surface. The second guide surface serves to guide the yarn to enter the inner side of the barb structure without turning over.
4. The reverse weft insertion rapier head according to claim 3, characterized in that: The first guiding surface includes a front curved surface and a side inclined plane.
5. The reverse weft insertion rapier head according to claim 4, characterized in that: The second guide surface is an inclined plane.
6. The reverse weft insertion rapier head according to claim 5, characterized in that: The clamping surface is a flat structure.
7. The reverse weft insertion rapier head according to claim 6, characterized in that: The angle between the inclined plane of the first guide surface and the horizontal plane is 40° to 60°.
8. The reverse weft insertion rapier head according to claim 7, characterized in that: The included angle between the inclined plane of the second guide surface and the horizontal plane is 40° to 60°.