Let-off mechanism of double-layer shed double-rapier loom
By employing a counterweight-type torque generation unit to provide reverse torque to the warp feed roller assembly in a double-shed double-rapier loom, the problem of unstable warp tension was solved, achieving efficient and low-cost warp tension control, and improving weaving quality and equipment maintainability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHANGZHOU WUJIN WUYANG TEXTILE MACHINERY CO LTD
- Filing Date
- 2023-11-16
- Publication Date
- 2026-04-28
AI Technical Summary
The existing double-shed double-rapier looms have upper and lower warp roller assemblies driven by independent motors, which makes it difficult to guarantee rotation accuracy, resulting in unstable warp tension. The motors are also expensive and difficult to maintain, and frequent forward and reverse operations are not easy to control.
The upper and lower warp roller assemblies are used to apply reverse torque through a counterweight torque generation unit. The reverse torque is generated by gravity to ensure stable warp tension. No power supply or manual intervention is required. The structural design is simplified, reducing maintenance difficulty and cost.
It achieves the goal of maintaining the tension of the upper and lower warp yarns within a reasonable range, automatically adjusting the warp yarn state, improving the smoothness of weaving and the firmness of the pile, and reducing equipment costs and maintenance difficulty.
Smart Images
Figure CN224172974U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of textile machinery manufacturing technology, and in particular to a warp feeding mechanism for a double-shed double-rapier loom. Background Technology
[0002] Rapier looms are known for their high speed, stability, and adaptability to various fabric types. They are widely used in industries such as yarn weaving, towels and quilts, silk weaving, wool weaving, and linen weaving. Among them, the double-shed double-rapier loom is particularly suitable for spatial fabrics where the upper and lower base fabrics are connected by a connecting line. If the connecting line is cut between the upper and lower base fabrics with a cutter, it will be velvet and clean velvet for industrial and apparel applications. It is the most common type of loom for weaving medium and small batches of patterned fabrics and has now developed into a widely used and numerous type of shuttleless loom.
[0003] With technological advancements, higher demands have been placed on the weaving efficiency, quality, and versatility of double-shed double-rapier looms. Specifically, this manifests in the requirement for good flatness in both the upper and lower sections of the interlocking fabric, and for more robust pile in velvet fabrics. Therefore, the industry has gradually shifted from single-product weaving to multi-product weaving, and from solely pursuing quality to prioritizing both quality and efficiency. Currently, most looms on the market employ double warp release devices to meet the requirements of double-layer bottom weaving. This means that the upper warp yarns released by the warp release device on the upper base fabric of the double-shed double-rapier loom, and the lower warp yarns released by the warp release device on the lower base fabric of the double-shed double-rapier loom, simultaneously participate in the weaving process with the assistance of upper and lower warp yarn feed roller assemblies respectively placed on the lower warp yarns. In existing technology, the upper and lower warp yarn feed roller assemblies are driven by two independent motors. When the tension of the upper and lower warp yarns fails to meet application requirements, the corresponding motors immediately activate. The upper and lower warp roller assemblies, under the influence of rotational torque, perform a reverse micro-oscillation motion, thus adjusting the tension of the upper and lower warp yarns. However, in practical applications, the rotational accuracy of the two independent motors is difficult to guarantee, which in turn affects the actual tension of the upper and lower warp yarns. Furthermore, because the tension of the upper and lower warp yarns is constantly changing, the two motors require extremely high response speeds, placing higher demands on their performance. Moreover, the motors are relatively expensive to purchase, and their assembly, debugging, and subsequent maintenance are difficult and time-consuming. Frequent forward and reverse operations also make it inconvenient to control the two motors. Therefore, it is imperative for technical personnel to explore these issues. Summary of the Invention
[0004] Therefore, in view of the above-mentioned existing problems and defects, the project team of this utility model collected relevant information, conducted multiple evaluations and considerations, and carried out continuous experiments and modifications by the project team members, which ultimately led to the emergence of the double-layer shed double rapier loom warp feeding mechanism.
[0005] To address the aforementioned technical problems, this utility model relates to a warp feeding mechanism for a double-layer shed double-rapier loom, comprising an upper warp feed roller assembly, a lower warp feed roller assembly, an upper crossbar layering assembly, and a lower crossbar layering assembly. Both the upper and lower warp feed roller assemblies are supported by the machine frame. The upper crossbar layering assembly is paired with and integrated with the upper warp feed roller assembly. The lower crossbar layering assembly is paired with and integrated with the lower warp feed roller assembly. The upper and lower warp yarns, drawn out via the upper and lower warp yarn release devices, both wound in an S-shape around the upper and lower warp feed roller assemblies, and are layered by the downstream upper and lower crossbar layering assemblies, respectively. Furthermore, the double-layer shed double-rapier loom warp feeding mechanism also includes an upper counterweight torque generating unit and a lower counterweight torque generating unit. During the weaving process, the upper and lower warp roller assemblies perform reverse micro-oscillation motion due to the torque generated by the upper and lower counterweight torque generating units, thus maintaining the upper and lower warp yarns in a reasonable tension state.
[0006] As a further improvement to the technical solution disclosed in this utility model, the upper warp feed roller assembly includes a first upper warp feed roller, a second upper warp feed roller, a first upper connecting plate, and a second upper connecting plate. The first upper connecting plate and the second upper connecting plate are positioned opposite each other along the width direction of the double-layer shed double rapier loom, and they cooperate to jointly support the first and second upper warp feed rollers. The first upper warp feed roller simultaneously penetrates the front and rear side walls of the frame, the first upper connecting plate, and the second upper connecting plate. When subjected to the torque from the upper counterweight torque generating unit, it performs a slight circumferential rotation around its central axis, and continues to transmit the torque to the second upper warp feed roller through the first and second upper connecting plates, allowing the second upper warp feed roller to perform a slight circumferential rotation around the central axis of the first upper warp feed roller.
[0007] As a further improvement to the technical solution disclosed in this utility model, the upper warp feed roller assembly also includes a first upper bearing seat and a second upper bearing seat. The first upper bearing seat and the second upper bearing seat cooperate to support the first upper warp feed roller and are detachably fixed to the front and rear side walls of the frame.
[0008] As a further improvement to the technical solution disclosed in this utility model, the upper crossbar layered assembly includes a first upper crossbar, a second upper crossbar, a first upper sheet metal bending component, and a second upper sheet metal bending component. The first upper sheet metal bending component and the second upper sheet metal bending component are respectively integrated with the first upper connecting plate and the second upper connecting plate, and work together to support the first and second upper crossbars arranged sequentially along the length direction of the double-layer shed double rapier loom.
[0009] As a further improvement to the technical solution disclosed in this utility model, the upper counterweight torque generating unit includes an upper load and an upper fixed transmission ratio gear train. The upper load applies torque to the first upper feed roller via the upper fixed transmission ratio gear train.
[0010] As a further improvement to the technical solution disclosed in this utility model, the upper fixed transmission ratio gear train includes a first upper gear, a second upper gear, and an upper mounting shaft. The upper mounting shaft is fixed to the frame and parallel to the first upper warp feed roller. The second upper gear is mounted on the upper mounting shaft, and its circumferential rotational freedom is not restricted. The first upper gear, which meshes with the second upper gear, is mounted on the first upper warp feed roller in a keyed connection manner. During the weaving process, the second upper gear performs circumferential rotational motion due to the rotational torque from the upper load, and the meshing first upper gear drives the first upper warp feed roller to synchronously perform reverse circumferential rotational motion.
[0011] As a further improvement to the technical solution disclosed in this utility model, the upper load includes an upper force-applying rod and an upper counterweight. The upper force-applying rod is fitted onto the upper mounting shaft and is used to directly drive the second upper gear. The upper counterweight is used to adjust the magnitude of the rotational torque applied by the upper force-applying rod to the second upper gear and is fitted onto the upper force-applying rod.
[0012] As a further improvement to the technical solution disclosed in this utility model, the number of upper counterweights is variable and they can slide along the length of the upper force-applying rod.
[0013] As a further improvement to the technical solution disclosed in this utility model, the upper load also includes an upper locking pin. When the upper counterweight slides along the upper force-applying rod to the expected position, the position is locked by the upper locking pin. The upper counterweight is formed with a first upper pin hole that matches the upper locking pin. A series of second upper pin holes that match the upper locking pin are formed on the upper force-applying rod, and are arranged linearly along its length.
[0014] As a further improvement to the technical solution disclosed in this utility model, the lower warp roller assembly includes a first lower warp roller, a second lower warp roller, a first lower connecting plate, and a second lower connecting plate. The first lower connecting plate and the second lower connecting plate are positioned opposite each other along the width direction of the double-layer shed double rapier loom, and they cooperate to jointly support the first and second lower warp rollers. The first lower warp roller passes through the front and rear side walls of the frame, the first lower connecting plate, and the second lower connecting plate. When subjected to the torque from the lower counterweight torque generating unit, it performs a slight circumferential rotation around its central axis, and continues to transmit the torque to the second lower warp roller through the first and second lower connecting plates, allowing the second lower warp roller to perform a slight circumferential rotation around the central axis of the first lower warp roller.
[0015] As a further improvement to the technical solution disclosed in this utility model, the lower counterweight torque generating unit includes a lower load. The lower load includes a lower force-applying rod and a lower counterweight. The lower force-applying rod is fitted onto the first lower warp feed roller and is tightly secured. The lower counterweight is used to adjust the torque value received by the first lower warp feed roller, and it is fitted onto the lower force-applying rod and can slide freely along the length direction of the lower force-applying rod.
[0016] In practical applications, the warp feeding mechanism of double-shed double-rapier looms has achieved at least the following beneficial technical effects, specifically reflected in:
[0017] 1) In the actual weaving process, the upper counterweight torque generating unit and the lower counterweight torque generating unit always apply torque to the upper warp feed roller assembly and the lower warp feed roller assembly in opposite directions. At this time, the tension of the upper warp yarn is directly related to the torque applied by the upper counterweight torque generating unit, while the tension of the lower warp yarn is directly related to the torque applied by the lower counterweight torque generating unit. Therefore, it is beneficial to ensure that the tension of the upper and lower warp yarns is maintained within a reasonable range.
[0018] 2) During the process of adjusting the tension of the upper and lower warp yarns, the upper counterweight torque generating unit and the lower counterweight torque generating unit can generate reverse torque by utilizing the gravity characteristics of their own structural design, without the need for power supply or manual intervention.
[0019] 3) Depending on the real-time tension of the upper and lower warp yarns, the torque generated by the corresponding upper counterweight torque generating unit and lower counterweight torque generating unit can change adaptively.
[0020] 4) It cleverly utilizes gravity to generate reverse torque, thus laying a good foundation for simplifying the design structure of the upper counterweight torque generation unit and the lower counterweight torque generation unit, and the assembly, adjustment and subsequent maintenance are extremely easy and cost-effective.
[0021] 5) In summary, the warp feeding mechanism disclosed in this utility model not only has extremely high working performance and an extremely compact design structure, but also allows the upper and lower warp yarns to automatically switch between tight and loose warp states according to the process requirements, ultimately making the formed fabric smoother and the pile on it more firmly. Attached Figure Description
[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0023] Figure 1 This is a three-dimensional schematic diagram of the warp feeding mechanism of a double-layer shed double-rapier loom in this utility model.
[0024] Figure 2 yes Figure 1 A magnified view of part of I.
[0025] Figure 3 yes Figure 1 The front view.
[0026] Figure 4 This is a three-dimensional schematic diagram of the warp feeding mechanism of the double-layer shed double rapier loom in this utility model from another perspective.
[0027] Figure 5 This is a flow path diagram of the warp yarns in a double-shed double-rapier loom of this utility model.
[0028] Figure 6 This is a three-dimensional schematic diagram of the assembled state of the upper warp roller assembly and the upper crossbar layering assembly in this utility model.
[0029] Figure 7 This is a three-dimensional schematic diagram of the upper-mounted warp feed roller assembly in this utility model.
[0030] Figure 8 This is a three-dimensional schematic diagram of the upper horizontal bar layered assembly in this utility model.
[0031] Figure 9 This is a three-dimensional schematic diagram of the lower warp roller assembly and the lower crossbar layering assembly in the completed state of this utility model.
[0032] Figure 10 This is a three-dimensional schematic diagram of the lower warp feed roller assembly in this utility model.
[0033] Figure 11 This is a three-dimensional schematic diagram of the lower horizontal bar layered assembly in this utility model.
[0034] Figure 12 This is a three-dimensional schematic diagram of the upper counterweight torque generating unit in this utility model (the first upper warp roller is shown in the form of a double-dotted line).
[0035] Figure 13 This is a three-dimensional schematic diagram of the upper force-applying rod in this utility model.
[0036] Figure 14 This is a three-dimensional schematic diagram of the upper counterweight in this utility model.
[0037] Figure 15 This is a three-dimensional schematic diagram of the lower counterweight torque generating unit in this utility model (the first lower warp roller is shown in the form of a double-dotted line).
[0038] Figure 16 This is a three-dimensional schematic diagram of the lower force-applying rod in this utility model.
[0039] Figure 17 This is a three-dimensional schematic diagram of the lower counterweight in this utility model.
[0040] 1-Upper warp feed roller assembly; 11-First upper warp feed roller; 12-Second upper warp feed roller; 13-First upper connecting plate; 14-Second upper connecting plate; 15-First upper bearing seat; 16-Second upper bearing seat; 2-Lower warp feed roller assembly; 21-First lower warp feed roller; 22-Second lower warp feed roller; 23-First lower connecting plate; 24-Second lower connecting plate; 25-First lower bearing seat; 26-Second lower bearing seat; 3-Upper crossbar layered assembly; 31-First upper crossbar; 32-Second upper crossbar; 33-First upper sheet metal bending piece; 34-Second upper sheet metal bending piece; 4-Lower crossbar layered assembly; 41-First lower crossbar; 42 - Second lower crossbar; 43- First lower sheet metal bending component; 44- Second lower sheet metal bending component; 5- Upper counterweight torque generating unit; 51- Upper load; 511- Upper force application rod; 5111- Second upper pin hole; 512- Upper counterweight; 5121- First upper pin hole; 513- Upper locking pin; 52- Upper fixed transmission ratio gear train; 521- First upper gear; 522- Second upper gear; 523- Upper mounting shaft; 6- Lower counterweight torque generating unit; 61- Lower load; 611- Lower force application rod; 6111- Second lower pin hole; 612- Lower counterweight; 6121- First lower pin hole; 613- Lower locking pin. Detailed Implementation
[0041] In the description of this utility model, it should be understood that the terms "front", "rear", "up", "down", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0042] The contents disclosed in this utility model will be further described in detail below with reference to specific embodiments. Figure 1 , 2As shown in Figures 3 and 4, the warp feeding mechanism of the double-shed double-rapier loom mainly consists of several parts: an upper warp feed roller assembly 1, a lower warp feed roller assembly 2, an upper crossbar layering assembly 3, a lower crossbar layering assembly 4, an upper counterweight torque generating unit 5, and a lower counterweight torque generating unit 6. The upper warp feed roller assembly 1 and the lower warp feed roller assembly 2 are both supported by the machine frame. The upper crossbar layering assembly 3 is paired with the upper warp feed roller assembly 1 and is integrated into one unit. The lower crossbar layering assembly 4 is paired with the lower warp feed roller assembly 2 and is integrated into one unit. The upper and lower warp yarns, drawn out by the upper and lower warp yarn release devices, both wind around the upper warp feed roller assembly 1 and the lower warp feed roller assembly 2 in an S-shape, and are layered by the lower crossbar layering assembly 3 and the lower crossbar layering assembly 4 located downstream (e.g., ...). Figure 5 (As shown in the diagram). During the weaving process, the upper counterweight torque generating unit 5 and the lower counterweight torque generating unit 6 function to apply reverse torque to the upper warp roller assembly 1 and the lower warp roller assembly 2, enabling the upper warp roller assembly 1 and the lower warp roller assembly 2 to perform reverse micro-amplitude swaying motion, thus maintaining a reasonable tension state for the upper and lower warp yarns.
[0043] In practical applications, the warp feeding mechanism of double-shed double-rapier looms has achieved at least the following beneficial technical effects, specifically reflected in:
[0044] 1) In the actual weaving process, the upper counterweight torque generating unit 5 and the lower counterweight torque generating unit 6 apply torque to the upper warp roller assembly 1 and the lower warp roller assembly 2 respectively, and in opposite directions. At this time, the tension of the upper warp yarn is directly related to the torque applied by the upper counterweight torque generating unit 5, while the tension of the lower warp yarn is directly related to the torque applied by the lower counterweight torque generating unit 6. Therefore, it is beneficial to ensure that the tension of the upper and lower warp yarns is maintained within a reasonable range.
[0045] 2) During the process of adjusting the tension of the upper and lower warp yarns, the upper counterweight torque generating unit 5 and the lower counterweight torque generating unit 6 can generate reverse torque by utilizing the gravity characteristics of their own structural design, without the need for power supply or manual intervention; and according to the different real-time tension of the upper and lower warp yarns, the torque generated by the corresponding upper counterweight torque generating unit 5 and lower counterweight torque generating unit 6 can undergo adaptive changes.
[0046] 3) The warp feeding mechanism disclosed in this utility model not only has extremely high working performance and an extremely compact design structure, but also allows the upper and lower warp yarns to automatically switch between tight and loose warp states according to the process requirements, ultimately making the formed fabric smoother and the pile on it more firmly.
[0047] It should also be noted that in this utility model, gravity is cleverly used to generate a reverse torque, which lays a good foundation for simplifying the design structure of the upper counterweight torque generating unit 5 and the lower counterweight torque generating unit 6, and the assembly, adjustment and subsequent maintenance are extremely easy and cost-effective.
[0048] It is known that, based on design common sense, the upper warp feed roller assembly 1 can adopt various structural forms to achieve the purpose of upper warp yarn winding tension design. However, a simple design structure that is easy to manufacture and implement, and facilitates subsequent maintenance operations is recommended here. Specifically, as follows: Figure 6 , 7 As shown, the upper warp roller assembly 1 mainly consists of a first upper warp roller 11, a second upper warp roller 12, a first upper connecting plate 13, and a second upper connecting plate 14. The first upper connecting plate 13 and the second upper connecting plate 14 are positioned opposite each other along the width direction of the double-layer shed double rapier loom, working together to support the first upper warp roller 11 and the second upper warp roller 12. The first upper warp roller 11 passes through the front and rear side walls of the frame, the first upper connecting plate 13, and the second upper connecting plate 14. When subjected to the torque from the upper counterweight torque generating unit 5, it performs a slight circumferential rotation around its central axis, and continues to transmit the torque to the second upper warp roller 12 via the first upper connecting plate 13 and the second upper connecting plate 14, allowing the second upper warp roller 12 to perform a slight circumferential rotation around the central axis of the first upper warp roller 11. During the weaving process, the upper counterweight torque generating unit 5 continuously applies torque to the first upper warp feed roller 11 under the action of gravity. With the assistance of the tension force from the upper warp yarn, the upper warp feed roller assembly 1 can perform a slight sway state. The upper warp yarn is always kept in a taut state because it is circumferentially wound.
[0049] Of course, by Figure 7 As can be clearly seen in the diagram, the upper warp feed roller assembly 1 is further provided with a first upper bearing seat 15 and a second upper bearing seat 16. The first upper bearing seat 15 and the second upper bearing seat 16 cooperate to support the first upper warp feed roller 1 and are detachably fixed to the front and rear side walls of the frame. In this way, the torque loss caused by friction is relatively small, which helps to ensure that the first upper warp feed roller 1 performs a smoother micro-oscillation movement when subjected to torque.
[0050] like Figure 6 , 8 As shown, the upper crossbar layering assembly 3 mainly consists of several parts, including a first upper crossbar 31, a second upper crossbar 32, a first upper sheet metal bending component 33, and a second upper sheet metal bending component 34. The first upper sheet metal bending component 33 and the second upper sheet metal bending component 34 are integrated with the first upper connecting plate 13 and the second upper connecting plate 14, respectively, and work together to support the first upper crossbar 31 and the second upper crossbar 32, which are arranged sequentially along the length direction of the double-layer shed double rapier loom. In practical applications, when performing layering operations on the upper warp yarns, or when it is required to change their flow direction, it is only necessary to change the way the upper warp yarns are wound relative to the first upper crossbar 31 and the second upper crossbar 32 (clockwise or counterclockwise).
[0051] For the purpose of achieving a similar design, the lower warp feed roller assembly 2 can also be designed with reference to the structural form of the upper warp feed roller assembly 1, such as... Figure 9 , 10 As shown, the lower warp roller assembly 2 mainly consists of a first lower warp roller 21, a second lower warp roller 22, a first lower connecting plate 23, and a second lower connecting plate 24. The first lower connecting plate 23 and the second lower connecting plate 24 are positioned opposite each other along the width direction of the double-layer shed double rapier loom, working together to support the first lower warp roller 21 and the second lower warp roller 22. The first lower warp roller 21 passes through the front and rear side walls of the frame, the first lower connecting plate 23, and the second lower connecting plate 24. When subjected to the torque from the lower counterweight torque generating unit 6, it performs a slight circumferential rotation around its central axis, and continues to transmit the torque to the second lower warp roller 22 via the first lower connecting plate 23 and the second lower connecting plate 24, allowing the second lower warp roller 22 to perform a slight circumferential rotation around the central axis of the first lower warp roller 21.
[0052] Depend on Figure 9 , 11 As shown, the lower crossbar layered assembly 4 and the upper crossbar layered assembly 3 have the same design structure, function, and assembly method. It mainly consists of several parts, including a first lower crossbar 41, a second lower crossbar 42, a first lower sheet metal bending component 43, and a second lower sheet metal bending component 44. The first lower sheet metal bending component 43 and the second lower sheet metal bending component 44 are combined with the first lower connecting plate 23 and the second lower connecting plate 24 respectively, and work together to support the first lower crossbar 41 and the second lower crossbar 42, which are arranged sequentially along the length of the double-layer shed double-rapier loom.
[0053] Figure 12A perspective view of the upper counterweight torque generating unit of this utility model is shown, which mainly consists of an upper load 51 and an upper fixed transmission ratio gear train 52. The upper load 51 applies torque to the first upper feed roller 12 via the upper fixed transmission ratio gear train 52. The upper fixed transmission ratio gear train 52 includes a first upper gear 521, a second upper gear 522, and an upper mounting shaft 523. The upper mounting shaft 523 is fixed to the frame and parallel to the first upper feed roller 12. The second upper gear 522 is mounted on the upper mounting shaft 523, and its circumferential rotational freedom is not restricted. The first upper gear 521, which meshes with the second upper gear 522, is mounted on the first upper feed roller 12 by a key connection. The upper load 51 includes an upper force-applying rod 511 and an upper counterweight 512. The upper force-applying rod 511 is mounted on the upper mounting shaft 523 and is used to directly drive the second upper gear 522. The upper counterweight 512 is used to adjust the magnitude of the torque applied by the upper force-applying rod 511 to the second upper gear 522, and is mounted on the upper force-applying rod 511. During the weaving process, the upper force-applying rod 511 and the upper counterweight 512 apply torque to the second upper gear 522 under their own weight. The first upper gear 521, which meshes with the second upper gear 522, drives the first upper warp roller 12 to perform a reverse circumferential rotation.
[0054] Furthermore, by Figure 12 As can be clearly seen in the diagram, the number of upper counterweights 512 is variable and they can slide along the length of the upper force-applying rod 511. Thus, during the weaving process, when it is necessary to fine-tune the tension of the upper warp yarns, the worker only needs to increase or decrease the number of upper counterweights 512 and adjust their relative positions, making the entire operation convenient and quick.
[0055] Of course, to ensure that the upper counterweight 512 always occupies the correct relative position with respect to the upper force bar 511 after adjustment, and thus avoid the failure of upper warp tensioning due to its accidental fall, as a further optimization of the above technical solution, such as Figure 12 As shown, the upper load 51 is further provided with an upper locking pin 513. When the upper counterweight 512 slides along the upper force-applying rod 511 to the expected position, the position can be locked by the upper locking pin 513. The upper counterweight 512 is formed with a first upper pin hole 5121 that matches the upper locking pin 513. A series of second upper pin holes 5111 that match the upper locking pin 513 are formed on the upper force-applying rod 511, and are arranged linearly along its length (e.g., ...). Figure 13 , 14 As shown in the image).
[0056] Figure 15A three-dimensional schematic diagram of the lower counterweight torque generating unit of this utility model is shown, indicating that its main body is the lower load 61. The lower load 61 mainly consists of a lower force-applying rod 611 and a lower counterweight 612. The lower force-applying rod 611 is fitted onto the first lower warp feed roller 21 and tightly embraces it. The lower counterweight 612 is used to adjust the torque value received by the first lower warp feed roller 21, and it is fitted onto the lower force-applying rod 611. The number of lower counterweights 612 is variable and can slide freely along the length of the lower force-applying rod 711. Thus, analogous to the adjustment method of the tension of the upper warp yarn, when it is necessary to fine-tune the tension of the lower warp yarn during the weaving process, the worker only needs to increase or decrease the number of lower counterweights 612 and adjust their relative positions, making the entire operation convenient and quick.
[0057] To achieve the same design purpose, the lower load 61 can also be designed entirely with reference to the structural form of the upper load 51. For example... Figure 16 , 17 As shown, the lower load 61 is further provided with a lower locking pin 613. When the lower counterweight 612 slides along the lower force-applying rod 611 to the expected position, it can be locked in place by the lower locking pin 613. The lower counterweight 612 is formed with a first lower pin hole 6121 that matches the lower locking pin 613. A series of second lower pin holes 6111 that match the lower locking pin 613 are formed on the lower force-applying rod 611, and are arranged linearly along its length.
[0058] Finally, it should be noted that, to ensure a more stable and superior performance of the warp feeding mechanism, the number of both the upper counterweight torque generating unit 5 and the lower counterweight torque generating unit 6 should be set to two, and they should be arranged on the front and rear sides of the frame respectively (e.g., Figure 1 , 4 As shown in the image).
[0059] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A warp feeding mechanism for a double-layer shed double-rapier loom, comprising an upper warp feed roller assembly, a lower warp feed roller assembly, an upper crossbar layering assembly, and a lower crossbar layering assembly; the upper warp feed roller assembly and the lower warp feed roller assembly are both supported by the machine frame; the upper crossbar layering assembly is matched with the upper warp feed roller assembly and is integrated into one unit; the lower crossbar layering assembly is matched with the lower warp feed roller assembly and is integrated into one unit; the upper warp yarns and lower warp yarns drawn out by the upper warp yarn release device and the lower warp yarn release device both pass around the upper warp feed roller assembly and the lower warp feed roller assembly in an S-shape, and are layered by the upper crossbar layering assembly and the lower crossbar layering assembly located downstream, characterized in that, It also includes an upper counterweight torque generating unit and a lower counterweight torque generating unit; during the weaving process, the upper warp roller assembly and the lower warp roller assembly perform reverse micro-amplitude swaying motion due to the torque generated by the upper counterweight torque generating unit and the lower counterweight torque generating unit, so that the upper warp yarn and the lower warp yarn can maintain a reasonable tension.
2. The warp feeding mechanism of the double-shed double-rapier loom according to claim 1, characterized in that, The upper warp feed roller assembly includes a first upper warp feed roller, a second upper warp feed roller, a first upper connecting plate, and a second upper connecting plate. The first upper connecting plate and the second upper connecting plate are positioned opposite each other along the width direction of the double-layer shed double rapier loom, and they work together to support the first upper warp feed roller and the second upper warp feed roller. The first upper warp feed roller passes through the front and rear side walls of the frame, the first upper connecting plate, and the second upper connecting plate. When subjected to the torque generated by the upper counterweight torque generating unit, it performs a slight circumferential rotation around its central axis, and continues to transmit the torque to the second upper warp feed roller through the first upper connecting plate and the second upper connecting plate, so that the second upper warp feed roller can perform a slight circumferential rotation around the central axis of the first upper warp feed roller.
3. The warp feeding mechanism of the double-shed double-rapier loom according to claim 2, characterized in that, The upper warp feed roller assembly also includes a first upper bearing seat and a second upper bearing seat; the first upper bearing seat and the second upper bearing seat cooperate to support the first upper warp feed roller and are detachably fixed to the front and rear side walls of the frame.
4. The warp feeding mechanism of the double-shed double-rapier loom according to claim 2, characterized in that, The upper crossbar layered assembly includes a first upper crossbar, a second upper crossbar, a first upper sheet metal bending component, and a second upper sheet metal bending component; the first upper sheet metal bending component and the second upper sheet metal bending component are respectively combined with the first upper connecting plate and the second upper connecting plate to form an integral unit, and cooperate to jointly support the first upper crossbar and the second upper crossbar arranged sequentially along the length direction of the double-layer shed double rapier loom.
5. The warp feeding mechanism of the double-shed double-rapier loom according to any one of claims 2-4, characterized in that, The upper counterweight torque generating unit includes an upper load and an upper fixed transmission ratio gear train; the upper load applies torque to the first upper feed roller via the upper fixed transmission ratio gear train.
6. The warp feeding mechanism of the double-shed double-rapier loom according to claim 5, characterized in that, The upper fixed transmission ratio gear train includes a first upper gear, a second upper gear, and an upper mounting shaft; the upper mounting shaft is fixed on the frame and parallel to the first upper warp feed roller; the second upper gear is mounted on the upper mounting shaft, and its circumferential rotational freedom is not restricted; the first upper gear, which meshes with the second upper gear, is mounted on the first upper warp feed roller in a keyed connection; during the weaving process, the second upper gear performs circumferential rotational motion due to the rotational torque from the upper load, and the meshing first upper gear drives the first upper warp feed roller to synchronously perform reverse circumferential rotational motion.
7. The warp feeding mechanism of the double-shed double-rapier loom according to claim 6, characterized in that, The upper load includes an upper force-applying rod and an upper counterweight; the upper force-applying rod is fitted onto the upper mounting shaft and is used to directly drive the second upper gear; the upper counterweight is used to adjust the magnitude of the rotational torque applied by the upper force-applying rod to the second upper gear and is fitted onto the upper force-applying rod.
8. The warp feeding mechanism of the double-shed double-rapier loom according to claim 7, characterized in that, The number of upper counterweights is variable and they can slide along the length of the upper force-applying rod; the upper load also includes an upper locking pin; when the upper counterweight slides along the upper force-applying rod to the expected position, the position is locked by the upper locking pin; the upper counterweight is formed with a first upper pin hole that matches the upper locking pin; a series of second upper pin holes that match the upper locking pin are formed on the upper force-applying rod and are arranged linearly along its length.
9. The warp feeding mechanism of the double-shed double-rapier loom according to claim 1, characterized in that, The lower warp roller assembly includes a first lower warp roller, a second lower warp roller, a first lower connecting plate, and a second lower connecting plate. The first lower connecting plate and the second lower connecting plate are positioned opposite each other along the width direction of the double-layer shed double rapier loom, and they cooperate to jointly support the first lower warp roller and the second lower warp roller. The first lower warp roller passes through the front and rear side walls of the frame, the first lower connecting plate, and the second lower connecting plate. When subjected to the torque from the lower counterweight torque generating unit, it performs a slight circumferential rotation around its central axis, and continues to transmit the torque to the second lower warp roller through the first lower connecting plate and the second lower connecting plate, so that the second lower warp roller can perform a slight circumferential rotation around the central axis of the first lower warp roller.
10. The warp feeding mechanism of the double-shed double-rapier loom according to claim 9, characterized in that, The lower counterweight torque generating unit includes a lower load; the lower load includes a lower force-applying rod and a lower counterweight; the lower force-applying rod is fitted onto the first lower warp feed roller and tightly embraces it; the lower counterweight is used to adjust the torque value received by the first lower warp feed roller, it is fitted onto the lower force-applying rod, and can slide freely along the length direction of the lower force-applying rod.