A three-dimensional special loom

Abstract

This invention discloses a three-dimensional special loom, including a link-type rapier belt. The link-type rapier belt is composed of several link blocks connected in series by elastic filaments, with each link block interlocked with the next. Each link block has a pivot portion and a shaft hole portion. The shaft hole portion of the previous link block is fitted onto the pivot portion of the next link block, forming a hinge structure with the paired pivot portions and shaft holes. The link-type rapier belt is rigid in the direction of gravity and can pivot and be rolled up for storage in the horizontal direction. The link-type rapier belt of this invention is rigid in the hinge axis. If placed vertically, this rapier belt can support its own weight, the weight of the rapier head, and the load weight of the yarn. The link blocks can be bent along the hinge, and when used as a weft insertion rapier belt in a rapier loom, it can be straight inside the shed or bent and stored outside the shed.

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] To address the problems existing in the prior art, the present invention aims to provide a three-dimensional special loom, including a chain-link rapier belt. The chain-link rapier belt is rigid in the weft insertion shed, capable of suspending and supporting its own weight, the weight of the rapier head, and the weight of the weft yarn; it is flexible outside the shed, can be curled up and stored, and does not take up much space.

[0005] To achieve the above-mentioned technical objectives and effects, the present invention is implemented through the following technical solution:

[0006] A three-dimensional special loom includes a link-type rapier belt, which is composed of several link blocks connected in series by elastic filaments, with each link block interlocked with the next. Each link block has a pivot portion and a shaft hole portion. The shaft hole portion of the previous link block is fitted onto the pivot portion of the next link block, forming a hinge structure with the paired pivot portions and shaft holes. The link-type rapier belt is rigid in the direction of gravity and can be cantilevered. The link-type rapier belt is kept able to move freely in and out of the shed space of the loom under load; the load includes the weight of the link-type rapier belt itself, the weight of the rapier head, the weight of the weft yarn, and the force when it intersects with the weft yarn of the opposite rapier head; the link-type rapier belt can be pivoted and curled up for storage in the horizontal direction; definition: the axial direction of the hinge structure is the direction of gravity, the pivoting direction of the hinge structure is the horizontal direction, and the free movement in and out means that the rapier belt device does not rub against the warp yarns forming the shed when it enters or exits the shed.

[0007] The implementation principle of this invention is as follows:

[0008] Multiple chain links are interconnected and interlocked to form a long strip sword belt. The elastic filament is straight in its free state, so the sword belt formed by the interconnected chain links is also straight. When a horizontal curling force is applied to the sword belt, the elastic filament bends and deforms under the action of the curling force, and the chain-link structure sword belt also deforms accordingly, allowing the sword belt to be curled and coiled on the sword belt pulley. When the external force is removed, the elastic filament straightens under its own elastic force, and the chain-link structure sword belt device also returns to a straight state.

[0009] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0010] The link-type rapier belt of the present invention is rigid in the hinge axis. If placed vertically (the axis is the direction of gravity), the rapier belt can support its own weight, the weight of the rapier head, and the load weight of the yarn, etc. The link block can be bent along the hinge. When used as a weft insertion rapier belt in a rapier loom, it can be in a straight state inside the shed (by means of the elasticity of the steel wire) or bent and stored outside the shed.

[0011] This invention cleverly designs the hinge's hole and shaft portions, with the opening in the hole making assembly and disassembly very simple. Alternatively, the chain links can be made of carbon fiber composite material, which has excellent strength and rigidity, is lightweight, wear-resistant, and self-lubricating.

[0012] The three-dimensional special loom using the chain-link rapier belt of the present invention is suitable for the production of three-dimensional multi-layer fabrics in the fabrication of composite material preforms, and is also suitable for the production of wide-width multi-layer fabrics.

[0013] 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

[0014] 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:

[0015] Figure 1 This is a schematic diagram of a chain-link rapier belt of a three-dimensional special loom in this invention.

[0016] Figure 2 for Figure 1 A schematic diagram of the structure of the chain link block used in the embodiments disclosed herein.

[0017] Figure 3 This is a schematic diagram of another embodiment of the chain-link rapier belt of the three-dimensional special loom of the present invention.

[0018] Figure 4 This is a schematic diagram of another embodiment of the chain-link rapier belt of the three-dimensional special loom of the present invention.

[0019] Figure 5 for Figure 4 A schematic diagram of the structure of the chain link block used in the embodiments disclosed herein. Detailed Implementation

[0020] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0021] 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

[0022] See Figure 1 , Figure 2As shown, a three-dimensional special loom includes a link-type rapier belt, which is composed of several link blocks 1 connected in series by elastic filaments 2, and the preceding link block 1 is interlocked with the following link block 1. Each link block 1 is provided with a pivot portion 101 and a shaft hole portion 102. The shaft hole portion 102 of the preceding link block 1 is sleeved on the pivot portion 101 of the following link block 1, and the paired pivot portions 101 and shaft hole portions 102 form a hinge structure. The link-type rapier belt is rigid in the direction of gravity and can be cantilevered to allow the link-type rapier belt to freely enter and exit the loom shed space with a load. The load includes the weight of the link-type rapier belt itself, the weight of the rapier head, the weight of the weft yarn, and the force when the weft yarn intersects with the opposite rapier head. The link-type rapier belt can pivot and curl up for storage in the horizontal direction; definition: the axial direction of the hinge structure is the direction of gravity, the pivoting direction of the hinge structure is horizontal, and the free entry and exit means that the rapier belt device does not rub against the warp yarns forming the shed when entering and exiting the shed.

[0023] Furthermore, in this embodiment, as Figure 2 As shown:

[0024] An opening 1021 is provided on the shaft hole portion 102, and the direction of the opening 1021 is parallel to the axial direction of the through hole 103.

[0025] A through hole 103 is provided at the center of the chain link 1, and the elastic filament 2 passes through the through hole 103.

[0026] Preferably, the material of the chain link 1 is a plastic-based carbon fiber composite material; the elastic filament 2 is a steel wire or a carbon fiber composite rib. Example

[0027] See Figure 3 As shown, a three-dimensional special loom includes a link-type rapier belt, which is formed by connecting several link blocks 1 in series with elastic filaments 2, and the preceding link block 1 is interlocked with the following link block 1; each link block 1 is provided with a pivot portion 101 and a shaft hole portion 102; the shaft hole portion 102 of the preceding link block 1 is sleeved on the pivot portion 101 of the following link block 1, and the paired pivot portions 101 and shaft hole portions 102 form a hinge structure; the link-type rapier belt is rigid in the direction of gravity; the link-type rapier belt can pivot and be coiled up in the horizontal direction; defined: the axial direction of the hinge structure is the direction of gravity, and the pivoting direction of the hinge structure is the horizontal direction.

[0028] Furthermore, in this embodiment:

[0029] An opening 1021 is provided on the shaft hole portion 102, and the direction of the opening 1021 is perpendicular to the axial direction of the through hole 103.

[0030] The chain link 1 has through holes 103 at both its upper and lower ends, and two elastic wires 2 are provided, each passing through one of the through holes 103. The design of the two elastic wires 2 allows the sword belt composed of the chain link 1 to have a larger sword belt width, thereby having a greater longitudinal load-bearing capacity. Example

[0031] See Figure 4 , Figure 5 As shown, a three-dimensional special loom includes a link-type rapier belt, which is formed by connecting several link blocks 1 in series with elastic filaments 2, and the preceding link block 1 is interlocked with the following link block 1; each link block 1 is provided with a pivot portion 101 and a shaft hole portion 102; the shaft hole portion 102 of the preceding link block 1 is sleeved on the pivot portion 101 of the following link block 1, and the paired pivot portions 101 and shaft hole portions 102 form a hinge structure; the link-type rapier belt is rigid in the direction of gravity; the link-type rapier belt can pivot and be coiled up in the horizontal direction; defined: the axial direction of the hinge structure is the direction of gravity, and the pivoting direction of the hinge structure is the horizontal direction.

[0032] Furthermore, such as Figure 5 As shown, the chain link 1 has a Z-shaped structure, with the pivot portion 101 provided on one shoulder of the Z-shaped structure and the shaft hole portion 102 provided on the other shoulder.

[0033] The pivot portion 101 includes a connecting portion 1011 and a functional portion 1012. An annular groove 1014 is formed between the connecting portion 1011 and the functional portion 1012. A stop pin groove 1013 is provided on the functional portion 1012. A stop pin 1022 is provided in the shaft hole portion 102. When the shaft hole portion 102 of the preceding chain link 1 is fitted onto the pivot portion 101 of the following chain link 1, the stop pin 1022 slides into the annular groove 1014 through the stop pin groove 1013. The structure of this embodiment can prevent the chain link belt from loosening during use.

[0034] 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 three-dimensional special loom, comprising a chain-link rapier belt, characterized in that: The link-type sword belt is composed of several link blocks (1) connected in series by elastic wire (2), and the previous link block (1) and the next link block (1) are interlocked. The chain link block (1) is provided with a rotating shaft part (101) and a shaft hole part (102). The chain link (1) has a Z-shaped structure. The rotating shaft (101) is provided on one shoulder of the Z-shaped structure, and the shaft hole (102) is provided on the other shoulder. The rotating shaft (101) includes a connecting part (1011) and a functional part (1012). An annular groove (1014) is formed between the connecting part (1011) and the functional part (1012). A nail stop groove (1013) is provided on the functional part (1012). A stop pin (1022) is provided inside the shaft hole (102); When the shaft hole (102) of the preceding chain link (1) is fitted onto the rotating shaft (101) of the following chain link (1), the stop pin (1022) slides into the annular groove (1014) through the stop pin groove (1013); The shaft hole portion (102) of the preceding chain link (1) is sleeved on the rotating shaft portion (101) of the following chain link (1), and the rotating shaft portion (101) and the shaft hole portion (102) in pairs form a hinge structure. The link-type rapier belt is rigid in the direction of gravity, and can be cantilevered to allow the link-type rapier belt to move freely in and out of the loom shed space under load. The link-type sword belt can be pivoted in the horizontal direction and then curled up for storage. The load includes the weight of the chain-link scissor belt itself, the weight of the scissor head, the weight of the weft yarn, and the force when the weft yarns intersect with the opposite scissor head. Multiple chain links (1) are connected in series and interlocked to form a long strip sword belt. The elastic filament (2) is in a straight state in a free state. The sword belt formed by the chain links (1) connected in series and interlocked also has a straight state. When a horizontal curling force is applied to the sword belt, the elastic filament (2) bends and deforms under the action of the curling force. The sword belt with the chain link structure also deforms and can be curled and coiled on the sword belt wheel. When the external force is removed, the elastic filament (2) straightens under its own elastic force, and the chain link structure sword belt device also returns to a straight state. Definition: The axial direction of the hinge structure is the direction of gravity, the pivoting direction of the hinge structure is the horizontal direction, and the free entry and exit means that the rapier device does not rub against the warp yarns forming the shed when entering and exiting the shed.

2. The three-dimensional special weaver of claim 1, wherein: The chain link (1) has through holes (103) at its upper and lower ends respectively, and the elastic filament (2) has two strands that pass through the through holes (103) arranged at the upper and lower ends respectively.

3. The three-dimensional special weaver of claim 1, wherein: The material of the chain link (1) is plastic-based carbon fiber composite material; the elastic filament (2) is steel wire or carbon fiber composite rib.

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