A sword belt and three-dimensional special loom

Abstract

The application discloses a sword belt, which is a thin-walled tubular structure, the cross section of the thin-walled tubular structure is an ellipse, a row of through holes are arranged on the front and back straight walls of the thin-walled tubular structure respectively, the corresponding through holes on the front and back walls are arranged in a staggered mode, creases are arranged at the intersections of the upper and lower arc walls of the thin-walled tubular structure and the long axis face, the sword belt is rigid in the direction of gravity, and the sword belt can be compressed and deformed in the horizontal direction. The sword belt with the thin-walled tubular structure is light in weight and good in flexibility, the pipe wall is rigid in a free state and can bear loads such as the weight of the sword belt, the weight of the sword head and the weight of the weft in the shed to be suspended and transferred; when the pipe wall is extruded and flattened, the sword belt has flexibility and can be bent and stored in the sword belt wheel outside the shed or changed into the warp direction, so that the sword belt does not occupy a large space. The sword belt is suitable for the manufacture of three-dimensional multi-layer fabrics in the manufacture of composite material preforms.

Description

Technical Field

[0001] This invention belongs to the field of textile machinery manufacturing and relates to the rapier mechanism of a rapier loom, particularly the rapier belt in a three-dimensional special loom used for manufacturing three-dimensional woven composite material preforms. Background Technology

[0002] Rapier looms are a type of shuttleless loom with a very wide range of applications. The rapier belt or rapier shaft is a key component for weft insertion in rapier looms. On rapier looms, it is usually driven by a rapier wheel, which carries the rapier head and weft yarn to complete the weft insertion function.

[0003] Rapier looms typically have rigid and flexible rapiers. A rigid rapier's rapier is rigid and can directly carry the weft yarn into the shed suspended in the air. This characteristic is ideal for weaving multi-layered fabrics in three-dimensional weaving. However, when a rigid rapier exits the shed, it inevitably occupies space outside the shed, meaning a rigid rapier loom occupies at least twice the width of the fabric in the width direction. Therefore, rigid rapier looms cannot be used for wide-width fabrics. A flexible rapier's rapier strip is flexible and can be wound around the shed, thus not occupying much space and allowing for the weaving of wide-width fabrics. However, the flexible rapier strip cannot support the weight of the rapier head and the strip itself, and cannot carry the weft yarn into the shed suspended in the air. Multiple guide hooks need to be installed inside the shed along the width direction to form a shuttle path supporting the flexible rapier strip. The guide hooks inevitably rub against the warp yarns. For three-dimensional multilayer composite fabrics, this friction is aggravated, causing the warp yarns to pill and seriously affecting weaving. In particular, when implementing multilayer weft insertion, the shed center height of each layer is different. It is necessary to adjust the height of the weft insertion rapier to align with the shed center while simultaneously adjusting the height of the guide hooks in the entire shed to form a flat shed path that supports the rapier. This is a very difficult and costly mechanical and electronic system. Therefore, multilayer fabric looms generally do not use this flexible rapier solution. Summary of the Invention

[0004] In order to solve the problems existing in the prior art, the present invention aims to provide a rapier belt, which is rigid in the weft insertion shed and can suspend and support its own weight, the weight of the rapier head and the weight of the weft yarn; it is flexible outside the shed and can be rolled up and stored without taking up much space.

[0005] To achieve the above-mentioned technical objectives and effects, the present invention is implemented through the following technical solution: A sword belt, comprising a thin-walled tubular structure with an elliptical cross-section, wherein a row of through holes is formed on the front and rear straight walls of the thin-walled tubular structure, and the corresponding through holes on the front and rear walls are staggered; creases are provided at the intersections of the upper and lower arcuate walls and the long axis of the thin-walled tubular structure; the sword belt is rigid in the direction of gravity and can cantilever the weight of the sword belt itself, the weight of the sword head assembly, the weight of the weft yarn, etc. within its length; the sword belt is compressible and deformable in the horizontal direction, the compression deformation being the elastic deformation of the tube wall of the sword belt; after compression deformation, the sword belt is flexible in the horizontal direction and can be coiled and stored on a sword belt reel; in the uncompressed state, the tube wall of the sword belt recovers to an elliptical shape due to its own elasticity.

[0006] The major axis of the ellipse is defined as the direction of gravity, and the minor axis is defined as the horizontal direction; the major axis extends along the central axis of the thin-walled tubular structure to form the major axis surface, and the minor axis extends along the central axis of the thin-walled tubular structure to form the minor axis surface.

[0007] Compared with the prior art, the beneficial effects of the present invention are as follows: The thin-walled tubular rapier structure of this invention is lightweight and flexible. In its free state, the tube wall is rigid, capable of bearing the weight of the rapier itself, the rapier tip, and the weft yarn during suspended weft insertion in the shed. When the tube wall is compressed and flattened, it becomes flexible, bending and can be stored in the rapier pulley outside the shed, or converted to warp direction, thus occupying minimal space. It is suitable for the fabrication of three-dimensional multilayer fabrics in composite material preforms, as well as for the fabrication of wide-width multilayer fabrics.

[0008] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it according to the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. Specific embodiments of the present invention are given in detail below with reference to the accompanying drawings. Attached Figure Description

[0009] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the sword belt of the present invention.

[0010] Figure 2 This is a cross-sectional schematic diagram of the sword belt of the present invention.

[0011] Figure 3 This is a cross-sectional view of the sword belt of the present invention.

[0012] Figure 4This is a schematic diagram of the sword belt being compressed and stored on the sword belt reel according to the present invention.

[0013] Figure 5 Other variations of the elliptical shape of the present invention. Detailed Implementation

[0014] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0015] It should be noted that all directional indicators (such as up, down, left, right, front, back, upper end, lower end, top, bottom, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly. Example 1:

[0016] See Figures 1-3 As shown, a sword belt is a thin-walled tubular structure with an elliptical cross-section. A row of through holes 5 is opened on the front and rear straight walls of the thin-walled tubular structure. The corresponding through holes 5 on the front and rear walls are staggered. A reinforcing layer 4 is provided on the upper and lower arc walls. A crease is provided at the intersection of the upper and lower arc walls of the thin-walled tubular structure with the long axis surface. A steel wire is embedded in the crease.

[0017] Furthermore, the sword belt is rigid in the direction of gravity, and can bear the weight of the sword belt itself, the weight of the sword head device, the weight of the weft yarn, and other loads within the length of the sword belt in a cantilever state.

[0018] Furthermore, the blade band is compressible and deformable in the horizontal direction. This compression deformation is the elastic deformation of the blade band's wall, and the compressed blade band is flexible in the horizontal direction. In the uncompressed state, the blade band's wall elastically recovers to an elliptical shape and regains its rigid support capacity. Figure 4 As shown, the spacing between the drive rollers 6 determines the degree to which the sword belt is compressed, and the compressed and deformed sword belt can be coiled and stored on the sword belt pulley 7.

[0019] The major axis AB of the ellipse is defined as the direction of gravity, and the minor axis CD is defined as the horizontal direction; the major axis AB extends along the central axis of the thin-walled tubular structure as the major axis surface, and the minor axis CD extends along the central axis of the thin-walled tubular structure as the minor axis surface.

[0020] Specifically, see Figure 5 As shown, the ellipse is not necessarily a standard ellipse in the mathematical sense. It can be an ellipse in the shape of an oblong, an oval, or a polygonal shape. The left and right sides of its arc walls are symmetrical about the major axis, and the upper and lower sides of its arc walls can be symmetrical about the minor axis, or they can be asymmetrical.

[0021] Furthermore, the thin-walled tubular structure is composed of a woven fabric winding layer 1 and a ribbon filament winding layer. The ribbon filament winding layer includes a clockwise winding layer 2 and a counterclockwise winding layer 3. The clockwise winding layer 2 and the counterclockwise winding layer 3 respectively avoid the through hole 5 to maintain the continuity of the fibers. Example 2:

[0022] This embodiment provides a three-dimensional special loom using the sword belt shown in Embodiment 1.

[0023] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A sword belt, characterized in that: The sword belt is a thin-walled tubular structure with an elliptical cross-section. A row of through holes (5) is opened on the front and rear straight walls of the thin-walled tubular structure, and the corresponding through holes (5) on the front and rear straight walls are staggered. A crease is provided at the intersection of the upper and lower arc walls and the long axis of the thin-walled tubular structure. The sword belt is rigid in the direction of gravity; it is compressible in the horizontal direction, and the compression deformation is the elastic deformation of the tube wall of the sword belt. After compression deformation, the sword belt is flexible in the horizontal direction; in the uncompressed state, the tube wall of the sword belt recovers to an elliptical shape due to its own elasticity. The major axis (AB) of the ellipse is defined as the direction of gravity, and the minor axis (CD) is defined as the horizontal direction; the major axis (AB) extends along the central axis of the thin-walled tubular structure as the major axis surface, and the minor axis (CD) extends along the central axis of the thin-walled tubular structure as the minor axis surface.

2. The sword belt according to claim 1, characterized in that: The ellipse is an oblong ellipse, an oval ellipse, or a polygonal ellipse. The left and right sides of its arc walls are symmetrical about the long axis, while the upper and lower arc walls can be symmetrical about the short axis or asymmetrical. The upper and lower arc walls are provided with reinforcing layers (4).

3. The sword belt according to claim 1, characterized in that: A steel wire is embedded in the crease.

4. The sword belt according to claim 1, characterized in that: The thin-walled tubular structure is composed of a woven fabric winding layer (1) and a ribbon filament winding layer. The ribbon filament winding layer includes a clockwise winding layer (2) and a counterclockwise winding layer (3). The clockwise winding layer (2) and the counterclockwise winding layer (3) respectively avoid the through hole (5).

5. A three-dimensional special loom, characterized in that: Use the sword belt as described in any one of claims 1-4.

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