A sword head device, sword belt and three-dimensional special loom

Abstract

The application discloses a kind of clamping piece, throw interface clamping piece type sword head device, sword belt and three-dimensional special loom, the clamping piece mainly by first piece, second piece, connecting pivot and spring are composed;The throw interface clamping piece type sword head device is divided into yarn feeding sword head device and yarn receiving sword head device, when weft is introduced, yarn feeding sword head device and yarn receiving sword head device move from both sides of shedding under the drive of respective sword belt, when respectively reaching weft transfer area, yarn feeding sword head throws out clamping piece, clamping piece flies over weft transfer area, is captured by yarn receiving sword head, completes weft transfer and completes weft introduction.The yarn feeding sword head device and yarn receiving sword head device of the application stop moving outside weft transfer area, yarn feeding sword head and yarn receiving sword head do not have mechanical contact and mechanical collision, do not need to be made heavy and strong and wear-resistant and impact-resistant, can be made very light, greatly reduce the requirement to the load capacity of sword belt.

Description

Technical Field

[0001] This invention belongs to the field of textile machinery manufacturing and relates to a device for a three-dimensional special loom used to produce three-dimensional woven composite material preforms. Background Technology

[0002] Rapier looms are a widely used type of shuttleless loom. In commonly used flexible rapier looms, the flexible rapier belt is divided into left and right sides. Each rapier belt has a rapier head at its end. The left (or right) side is the feed head, carrying the weft yarn into the shed; the right (or left) side is the receiving head. During weft insertion, the two rapier belts move towards each other. The left rapier belt carries the yarn to the right and enters the shed, while the right rapier belt moves to the left and also enters the shed. The two rapier heads meet and contact in the middle of the shed, activating the mechanical mechanism in the rapier head. The feed head then hands the weft yarn to the receiving head, completing the weft yarn transfer. Afterward, the two rapier belts move in opposite directions, the left rapier belt moving to the left and the right rapier belt moving to the right, exiting the shed. At this point, the receiving head of the right rapier belt, holding the weft yarn, exits the shed, completing the weft insertion.

[0003] The two warp heads collide and meet during high-speed movement to complete the weft yarn handover. Reliability requirements are extremely high; therefore, the warp heads must be very robust, impact-resistant, collision-resistant, and abrasion-resistant. They are often made of alloy materials, making it difficult to reduce their size and weight. Furthermore, to ensure the two warp heads meet face-to-face, the speed control and positioning accuracy of the warp belt and drive mechanism must be very high. Otherwise, weft yarn handover failure may occur, or even accidents such as cutting warp yarns or damage to the warp heads, belt guides, and hooks due to collisions may happen.

[0004] To ensure the motion control accuracy and reliable operation of the two sword belts, a single motor is commonly used to drive them, with a mechanical system connecting the two sword-feeding mechanisms for synchronous movement. For wide fabrics, the implementation of this two-sided mechanical synchronous linkage mechanism becomes more difficult and costly. For three-dimensional multilayer fabrics requiring composite materials, the height of the sword belts needs to be adjusted synchronously on both sides, which is even more challenging to achieve. Summary of the Invention

[0005] In order to solve the problems existing in the prior art, the present invention aims to provide a clamping plate, a throwing clamping plate type scissor head device, a scissor belt and a three-dimensional special loom. The application of the technology of the present invention will not cause mechanical collision between scissor heads during the weft insertion process, and can reduce the motion positioning accuracy.

[0006] To achieve the above-mentioned technical objectives and effects, the present invention is implemented through the following technical solution:

[0007] A clamping piece mainly comprises a first plate, a second plate, a connecting shaft, and a spring. The first plate includes a first clamping portion in the middle and first upturned portions at both ends, with a first limiting groove formed on the first upturned portion. The second plate includes a second clamping portion in the middle and second upturned portions at both ends, with a second limiting groove formed on the second upturned portion. The first upturned portion and the second upturned portion are arranged in opposite directions, and one side of the first clamping portion and the second clamping portion are pivotally connected via the connecting shaft. At least one side of the first upturned portion near the connecting shaft is provided with a first spring connecting portion, and at least one side of the second clamping portion away from the connecting shaft is provided with a second spring connecting portion. The two ends of the spring are respectively connected to the first spring connecting portion and the second spring connecting portion.

[0008] Under the tension of the spring, the clamp has two stable states: open and closed. When the clamp is in the closed state, it can clamp the weft yarn end, and driving the clamp to move will drive the weft yarn to move.

[0009] Another objective of this invention is to provide a throwing and clamping type sword tip device.

[0010] The throwing and attaching clip-type rapier head device includes a yarn feeding rapier head device for throwing out the clip and a yarn receiving rapier head device for receiving the clip. During weft insertion, the yarn feeding rapier head device and the yarn receiving rapier head device move towards each other from both sides of the shed under the drive of their respective rapier belts. When they reach the weft yarn junction area, the yarn feeding rapier head device throws out the clip, which flies over the weft yarn junction area and is captured and held by the yarn receiving rapier head device, completing the weft yarn junction and weft insertion.

[0011] Furthermore, the weft yarn junction area is the interval between the yarn feeder and the yarn receiver, and its weft distance is 10-200mm.

[0012] Another objective of this invention is to provide a sword belt:

[0013] Preferably, the rapier belt includes the yarn feeding rapier head device.

[0014] Preferably, the scissor belt includes the yarn-jointing scissor head device.

[0015] Another objective of this invention is to provide a three-dimensional special loom.

[0016] Preferably, the three-dimensional special loom uses the clamping plate, the throwing-and-jointing clamping plate type scissor head device, and the scissor belt.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] 1. The yarn feeding scissor head device and the yarn receiving scissor head device of the present invention stop moving outside the weft yarn intersection area. There is no mechanical contact or mechanical collision between the yarn feeding scissor head and the yarn receiving scissor head. It does not need to be made bulky, sturdy, wear-resistant and impact-resistant. It can be made very light and compact, which greatly reduces the requirements for the load capacity of the scissor belt.

[0019] 2. After the yarn end is clamped by the clip, the movement of the yarn is controlled simply by pushing and controlling the clip. The rigid mechanical object such as the clip is much easier to control than the soft yarn. The yarn feeding scissor head device feeds out the weft yarn by throwing out the clip, and the yarn receiving scissor head device receives the weft yarn by magnetically adsorbing the clip. The requirements for the accuracy of the scissor head movement are greatly reduced.

[0020] 3. The baffle and block form the mechanism for controlling the throwing mechanism. It is simple and effective. The ingenious design of the fixed-length pull rope controlling the release of the throwing mechanism makes the entire yarn feeding scissor head very light, low in cost, and highly reliable.

[0021] 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

[0022] 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:

[0023] Figure 1 is a schematic diagram of the structure of the clip of the present invention; wherein, Figure 1(a) shows the clip in the closed state and Figure 1(b) shows the clip in the open state.

[0024] Figure 2 is a schematic diagram of the yarn feeding scissor head device of the throwing and clamping scissor head device of the present invention; wherein, Figure 2(a) shows the structural schematic diagram before throwing the clamping piece, Figure 2(b) shows the structural schematic diagram after throwing the clamping piece, and Figure 2(c) shows a comparative schematic diagram before and after throwing.

[0025] Figure 3 Figure 2 shows a partial cross-sectional view of the yarn feeding rapier device.

[0026] Figure 4 This is a schematic diagram of the push rod mechanism of the present invention.

[0027] Figure 5 This is a schematic diagram showing the connection relationship between the pull rope part and the external mechanism in the yarn feeding rapier device of the present invention.

[0028] Figure 6This is a schematic diagram of the yarn-jointing scissor head device of the throwing and clamping scissor head device of the present invention.

[0029] Figure 7 This is an embodiment of the sword belt of the present invention.

[0030] Figure 8 This is another embodiment of the sword belt of the present invention.

[0031] Figure 9 This is a schematic diagram of the weft yarn handover process on the three-dimensional special loom of the present invention. Detailed Implementation

[0032] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0033] 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

[0034] Referring to Figures 1(a) and 1(b), this embodiment discloses a clamping piece, which mainly consists of a first piece 1, a second piece 2, a connecting shaft 3, and a spring 4; the first piece 1 includes a first clamping part 101 in the middle and first upturned parts 102 at both ends, and the first upturned parts 102 are provided with a first limiting groove 1022; the second piece 2 includes a second clamping part 201 in the middle and second upturned parts 202 at both ends, and the second upturned parts 202 are provided with a second limiting groove 2021; the first The upturned portion 102 and the second upturned portion 202 are arranged in opposite directions. The first clamping portion 101 and one side of the second clamping portion 201 are pivotally connected by the connecting shaft 3. A first spring connecting portion 1021 is provided on at least one side of the first upturned portion 102 near the connecting shaft 3, and a second spring connecting portion 2011 is provided on at least one side of the second clamping portion 201 away from the connecting shaft 3. The two ends of the spring 4 are respectively connected to the first spring connecting portion 1021 and the second spring connecting portion 2011.

[0035] Furthermore, the clip is made of a magnetically conductive material. Example

[0036] See Figure 9 As shown in the figure, this embodiment discloses a throwing and receiving clip-type scissor head device, which includes a yarn feeding scissor head device and a yarn receiving scissor head device. The yarn feeding scissor head device is used to throw out the clip as described in Embodiment 1, and the yarn receiving scissor head device is used to receive the clip as described in Embodiment 1.

[0037] Further, see Figures 2(a), 2(b), and 2(c). Figure 3 and Figure 4 As shown, the yarn feeding device also includes a guide rod 5 and a bracket 6 integral with the guide rod 5. The guide rod 5 and the bracket 6 form a U-shaped structure. A push rod mechanism 7 passes through the opening direction of the U-shaped structure. The push rod mechanism 7 includes a rear rod portion 701, a front rod portion 702, and a middle push portion 703 located between the rear rod portion 701 and the front rod portion 702. The tail end of the rear rod portion 701 is adjustablely connected to a stop portion 704 via a thread. A weft groove 7031 for the weft yarn 100 is opened on one side of the middle push portion 703. A third limiting groove 7032 is opened below the middle push portion 703, and the third limiting groove 7032 straddles the guide rod 5. The U-shaped structure is located between the stop portion 704 and the middle push portion 703. A projectile spring 8 is sleeved on the rear rod portion 701, and one end of the projectile spring 8 abuts against the guide rod 5. The other end of the push part 703 abuts against the bottom of the U-shaped recess; a sliding groove 601 is provided above the bracket 6, and a baffle 9 is slidably provided in the sliding groove 601. One end of the baffle 9 is connected to a pull rope 11. A receiving space is provided at the outer end of the sliding groove 601. A flip-up block 10 is provided in the receiving space. The block 10 includes a top surface A and a side surface B adjacent to the top surface A. When the baffle 9 abuts against the top surface A, the side surface B abuts against the push part 703; when the baffle 9 disengages from the top surface A, the block 10 flips, and the side surface B disengages from the push part 703; the clamp is located between the guide rod 5 and the front rod part 702, and the first limiting groove 1022 and the second limiting groove 2021 respectively straddle the corresponding guide rod 5 and the front rod part 702.

[0038] Preferably, the accommodating space is provided with a plurality of pairs of rotating shaft holes 602, and the stop block 10 can be disposed on any pair of the rotating shaft holes 602. The compression ratio of the spring can be controlled and the elastic force of the throwing plate can be adjusted by adjusting the position of the stop block 10.

[0039] Further, see Figure 5 As shown, the pull rope 11 is fixed with a length limiter 1101 at a preset fixed length position. The pull rope 11 is elastically wound into the pull rope storage box 12 outside the loom shed. The pull rope 11 passes through a limit baffle 13. The length limiter 1101 is located between the pull rope storage box 12 and the limit baffle 13.

[0040] Preferably, the pull rope 11 is a thin steel wire, which is elastically wound in the pull rope storage box 12 outside the shed of the loom. The pull rope 11 moves in and out of the shed with the movement of the yarn feeding scissor head device. A fixed length limiter 1101 is set at a fixed length position of the pull rope 11. After the pull rope 11 enters the fixed length position of the shed with the yarn feeding scissor head device, the pull rope stops being fed. At this time, the yarn feeding scissor head device continues to move forward, and the baffle 9 at the end of the pull rope 11 can only slide in the slide groove 601, thereby opening the restriction on the rotation of the baffle 10. The push rod mechanism 7 throws out the clip under the elastic force of the throwing spring 8.

[0041] Working principle:

[0042] As shown in Figure 2(a), the launching spring 8 is compressed by the push part 703 of the push rod mechanism 7. The stop block 10 and the stop plate 9 form a limiting / releasing mechanism. The stop plate 9 restricts the rotation of the stop block 10, and the side B of the stop block 10 restricts the displacement of the push rod mechanism 7, so that the push rod mechanism 7 remains in the compressed position of the launching spring 8, that is, the energy storage and ready-to-launch state; see Figure 2(c) and Figure 3 As shown, when the baffle 9 moves to the left by a distance a, where a is greater than or equal to the width of the top surface A, the rotation restriction of the baffle 9 on the block 10 is removed. The block 10 will rotate 90 degrees under the pushing force of the push rod mechanism 7, and the displacement restriction of the block 10 on the push rod mechanism 7 will be removed. The push rod mechanism 7 will then quickly move to the right under the action of the spring force, throwing the clamping piece along the guide rod 5.

[0043] Further, see Figure 6 As shown, the yarn receiving device includes a receiving plate 14. The receiving area of ​​the receiving plate 14 is provided with a pair of strong magnets 15 for adsorbing the clips. The pair of strong magnets 15 are arranged front and back to expand the range of adsorption of the clips.

[0044] Preferably, the receiving plate 14 has a toothed edge structure 1401 around its perimeter. Therefore, even if the thrown clip deviates, as long as the toothed edge catches the raised part of the clip, the weft yarn transfer can still be completed. Example

[0045] This embodiment discloses a scissor belt that includes the yarn feeding scissor head device described in Embodiment 2, or the yarn receiving scissor head device described therein.

[0046] Preferred, see Figure 7 As shown, the rapier belt is a link-type rapier belt 200 connected to the yarn feeding rapier head device or the yarn receiving rapier head device via a link-type connecting block 300; the patent application for the link-type rapier belt 200 was filed on the same day.

[0047] Preferred, see Figure 8As shown, the rapier belt is a thin-walled tubular structure rapier belt 400 connected to the yarn feeding rapier head device or the yarn receiving rapier head device via a tubular connecting block 500; the patent application for the thin-walled tubular structure rapier belt was filed on the same day.

[0048] The lightweight design of the yarn feeding and receiving devices allows the chain-link or thin-walled tubular rapier belts to enter and exit the shed in mid-air, completing the mid-weft yarn handover, which is of great significance for wide-width, multi-layered fabrics. Example

[0049] This embodiment provides a three-dimensional special loom that uses the clamping plate described in Embodiment 1, the throwing and splicing clamping plate type scissor head device described in Embodiment 2, and the scissor belt described in Embodiment 3.

[0050] like Figure 9 As shown, this embodiment illustrates the weft yarn handover process of a three-dimensional special loom.

[0051] 1. The left and right rapiers advance in both directions. When the yarn feeding rapier and the yarn receiving rapier reach the weft yarn junction area, the yarn receiving rapier stops moving. The receiving plate 14 of the yarn receiving rapier is slightly lower than the clamping plate position in the yarn feeding rapier.

[0052] 2. The yarn feeding device continues to move forward, causing the baffle 9 to move away from the position that restricts the rotation of the block 10 under the restriction of the pull rope 11. The push rod mechanism 7 is activated, and the clamping piece is thrown out and flies over the weft yarn junction area.

[0053] 3. The weft yarn hand-joining device captures the clamping piece, the weft yarn hand-joining is completed, and the retraction of the hand-joining device begins.

[0054] The automated continuous operation of the three-dimensional special loom also requires an automatic "ply loading" action on the yarn feeding side, which involves closing the clamps to hold the weft yarn end and inserting the spring-compressed yarn feeding rapier device; an automatic "ply unloading" action on the yarn receiving side, which involves opening the clamps to handle waste yarn ends; and a "ply supply" action to continuously arrange the "ply unloading" clamps and transport them to the yarn feeding side to supply the ply loading needs. This series of actions has mature applications in rapier looms. Although the "clamps" of this invention are not the same as the "rapier shuttle" in rapier looms, the convenience of ply loading and unloading actions has been considered in the clamp design. The above actions can be fully implemented by referring to existing mature technologies, so they will not be described again in this embodiment.

[0055] 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 tip device, characterized in that: It includes a yarn feeding scissor head device for throwing out the clip and a yarn receiving scissor head device for receiving the clip; during weft insertion, the yarn feeding scissor head device and the yarn receiving scissor head device move towards each other from both sides of the shed under the drive of their respective scissor belts. When they reach the weft yarn junction area, the yarn feeding scissor head device throws out the clip, the clip flies over the weft yarn junction area, and is captured and held by the yarn receiving scissor head device, thus completing the weft yarn junction and completing the weft insertion; The clamping piece mainly consists of a first piece (1), a second piece (2), a connecting shaft (3), and a spring (4); the first piece (1) includes a first clamping part (101) in the middle and a first upturned part (102) at both ends, and a first limiting groove (1022) is provided on the first upturned part (102); the second piece (2) includes a second clamping part (201) in the middle and a second upturned part (202) at both ends, and a second limiting groove (2021) is provided on the second upturned part (202); the first upturned part (102) and the second upturned part (202) are connected by a first clamping part (101) and a second limiting groove (2021); the first upturned part (102) and the second upturned part (202) are connected by a first clamping part (101) in the middle and a second upturned part (202) at both ends; the first upturned part (102) and the second upturned part (202) are connected by a first clamping part (101) and a second limiting groove (2021) at both ends; the first upturned part (102) and the second upturned part (202) are connected by a first clamping part (101) and a second limiting groove (2021) at both ends; the first upturned part (101 ... The upturned portion (202) is arranged in the opposite direction, and the first clamping portion (101) and one side of the second clamping portion (201) are pivotally connected by the connecting shaft (3); a first spring connecting portion (1021) is provided on at least one side of the first upturned portion (102) near the connecting shaft (3), and a second spring connecting portion (2011) is provided on at least one side of the second clamping portion (201) away from the connecting shaft (3); the two ends of the spring (4) are respectively connected to the first spring connecting portion (1021) and the second spring connecting portion (2011). The yarn feeding device includes a guide rod (5) and a bracket (6) integral with the guide rod (5). The guide rod (5) and the bracket (6) form a U-shaped structure. A push rod mechanism (7) is provided through the opening direction of the U-shaped structure. The clamp is located between the guide rod (5) and the push rod mechanism (7). The first limiting groove (1022) and the second limiting groove (2021) respectively straddle the corresponding guide rod (5) and the push rod mechanism (7). The yarn-jointing device includes a receiving plate (14), and the receiving area of ​​the receiving plate (14) is provided with a pair of strong magnets (15) for adsorbing the clips. The pair of strong magnets (15) are arranged in front and behind to expand the range of adsorbing the clips.

2. The sword tip device according to claim 1, characterized in that: The push rod mechanism (7) includes a rear rod part (701), a front rod part (702), and a middle push part (703) located between the rear rod part (701) and the front rod part (702). The tail end of the rear rod part (701) is connected to a stop part (704) by a thread. A weft groove (7031) for the weft yarn (100) to pass through is provided on one side of the middle push part (703). A third limiting groove (7032) is provided below the middle push part (703), and the third limiting groove (7032) straddles the guide rod (5). The U-shaped structure is located between the stop (704) and the middle push (703), and a projectile spring (8) is sleeved on the rear rod (701). One end of the projectile spring (8) abuts against the middle push (703) and the other end abuts against the bottom of the U-shaped structure. A slide groove (601) is provided above the bracket (6). A baffle (9) is slidably provided in the slide groove (601). A pull rope (11) is connected to one end of the baffle (9). A receiving space is provided at one end of the outer side of the slide groove (601). A flip-up block (10) is provided in the receiving space. The block (10) includes a top surface (A) and a side surface (B) adjacent to the top surface (A). When the baffle (9) abuts against the top surface (A), the side surface (B) abuts against the middle push part (703). When the baffle (9) disengages from the top surface (A), the block (10) flips and the side surface (B) disengages from the middle push part (703). The clip is located between the guide rod (5) and the front rod portion (702), and the first limiting groove (1022) and the second limiting groove (2021) respectively straddle the corresponding guide rod (5) and the front rod portion (702).

3. The sword tip device according to claim 2, characterized in that: The accommodating space is provided with a plurality of pairs of rotating shaft holes (602), and the stop block (10) can be provided on any pair of the rotating shaft holes (602).

4. The sword tip device according to claim 2, characterized in that: The pull rope (11) is fixed with a length limiter (1101) at a preset length position. The pull rope (11) is elastically wound into the pull rope storage box (12) outside the loom shed. The pull rope (11) passes through a limit baffle (13). The length limiter (1101) is located between the pull rope storage box (12) and the limit baffle (13).

5. The sword tip device according to claim 1, characterized in that: The clips are made of magnetically conductive material.

6. The sword tip device according to claim 1, characterized in that: The periphery of the receiving plate (14) has a toothed edge structure (1401).

7. A sword belt, characterized in that: Includes the sword tip device as described in any one of claims 1-6.

8. A three-dimensional special loom, characterized in that: Includes the sword tip device as described in any one of claims 1-6 and / or the sword belt as described in claim 7.

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