An opening device and method for a rapier loom

Abstract

The application discloses an opening device and method of a rapier loom, and the device comprises a plurality of opening components arranged at equal intervals, wherein the opening component comprises a guide support, an opening heald, an adjusting heald and a driving mechanism; the opening heald is installed on the guide support in a lifting manner; the adjusting heald is installed on the guide support in a lifting manner and located on the side of the opening heald away from the rapier of the rapier loom; the driving mechanism is connected with the opening heald and the adjusting heald and used for driving the opening heald and the adjusting heald to move in opposite directions synchronously; and the moving stroke of the driving mechanism increases with the increase of the distance between the opening component and the rapier of the rapier loom. By arranging a plurality of opening components controlled independently and gradually increasing the moving stroke of the opening component away from the rapier, the consistency of the opening size is ensured, the number of the opening components is increased, and the weaving process of the rapier loom is expanded.

Description

Technical Field

[0001] This invention relates to the field of textile machinery technology, and in particular to a shedding device and method for a rapier loom. Background Technology

[0002] Rapier looms are a new type of loom that uses rapiers to perform weft insertion. They are characterized by high speed, high automation, and high efficiency. They can adapt to weft yarns of different materials, thicknesses, and cross-sectional shapes, and are widely used in industries such as yarn weaving, towels and quilts, silk weaving, wool weaving, and linen weaving.

[0003] In the operation of a rapier loom, an opening is first formed at the warp yarns by a shedding device, and then the weft insertion is achieved by the rapier passing through the opening. However, as... Figure 1 As shown, in existing shedding devices, the size of the opening 7 gradually decreases as the distance between the shedding heald frame 2 and the fabric 6 increases. When the number of heald frames reaches a certain point, the size of the opening will be insufficient for the rapier to pass through, thus limiting the number of heald frames in the shedding device and consequently restricting the weaving process of the rapier loom.

[0004] Based on the above-mentioned technical problems, this application proposes a shedding device and method for a rapier loom. Summary of the Invention

[0005] The purpose of this invention is to provide a shedding device and method for a rapier loom to solve the technical problems mentioned in the background art. This purpose is achieved through the following technical solutions:

[0006] A shedding device for a rapier loom includes several shedding assemblies arranged equidistantly in a straight line. Each shedding assembly includes a guide bracket, a shedding heald frame, an adjusting heald frame, and a drive mechanism. The shedding heald frame is vertically mounted on the guide bracket and contains several shedding healds with shedding eyes. The adjusting heald frame is vertically mounted on the guide bracket and is located on the side of the shedding heald frame away from the rapier shaft of the rapier loom. The adjusting heald frame contains adjusting healds, which correspond one-to-one with the shedding healds, and each adjusting heald has an adjusting eye. The drive mechanism is connected to the shedding heald frame and the adjusting heald frame, and drives the shedding heald frame and the adjusting heald frame to move synchronously in opposite directions. The travel distance of the drive mechanism increases with the increase of the distance between the shedding assembly and the rapier shaft of the rapier loom. There is a height difference between the adjusting eyes and the shedding eyes, and this height difference increases with the increase of the distance between the shedding assembly and the rapier shaft of the rapier loom.

[0007] Furthermore, the guide bracket includes two vertical brackets arranged side by side, with guide rails vertically mounted on the opposite side of the two vertical brackets. The open heald frame and the adjustable heald frame are respectively connected to the guide rails via sliders.

[0008] Furthermore, the driving mechanism includes an opening driving component and an adjustment driving component. The opening driving component is connected to the opening heald frame via a transmission assembly and is used to drive the opening heald frame to move up and down reciprocally. The adjustment driving component is connected to the adjustment heald frame via a transmission assembly and is used to drive the adjustment heald frame to move up and down reciprocally.

[0009] Furthermore, both the opening drive component and the adjustment drive component are motors.

[0010] Furthermore, the transmission assembly includes a drive arm, a first connecting rod, a rotating arm, a rotating shaft, and a second connecting rod. One end of the drive arm is fixedly connected to the output shaft of the motor, and one end of the first connecting rod is rotatably connected to the other end of the drive arm. The rotating arm includes a driving rod and a driven rod. One end of the driving rod is connected to one end of the driven rod, and the connection between the driving rod and the driven rod is rotatably connected to the rotating shaft. The end of the driving rod away from the rotating shaft is rotatably connected to the other end of the first connecting rod, and the end of the driven rod away from the rotating shaft is rotatably connected to one end of the second connecting rod. The other end of the second connecting rod is connected to an open heald frame or an adjustable heald frame.

[0011] Furthermore, there are two rotating arms, two rotating shafts, and two connecting rods, with a connecting rod three connecting the two rotating arms.

[0012] Furthermore, the heddle fibers are adjusted to be elastic fibers.

[0013] A method for opening the sheathing device of any of the above-mentioned rapier looms includes the following steps:

[0014] Step S1: Adjust the position of the open heald frame and the adjusting heald frame through the drive mechanism so that the position of the open heald eye coincides with the position of the adjusting heald eye;

[0015] Step S2: Pass the warp yarns on the warp drum through the adjusting eyelets and the open eyelets in sequence, and then wind them onto the cloth roller;

[0016] Step S3: Adjust the position of the open heald frame and the adjusting heald frame through the drive mechanism so that the position of the adjusting heald eye is higher than the position of the open heald eye. As the distance between the adjusting heald eye and the rapier loom increases, the height difference between the adjusting heald eye and the open heald eye gradually increases.

[0017] Step S4: Tensile the warp yarns on each opening assembly, and control each opening assembly to perform the opening action through the drive mechanism.

[0018] The technical solutions provided in this application have at least the following technical effects or advantages:

[0019] 1. By setting up several independently controlled shedding components and gradually increasing the stroke of the shedding components as they move away from the rapier, the consistency of the shedding size is ensured, thereby increasing the number of shedding components and expanding the weaving process of the rapier loom.

[0020] 2. By setting up a heald frame with synchronous and opposite movements, the warp tension on each shedding assembly remains constant, thus avoiding the problem of uneven warp tension caused by different movement strokes of different shedding assemblies. Attached Figure Description

[0021] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0022] Figure 1 Schematic diagram of an existing opening device;

[0023] Figure 2 This is a schematic diagram of the opening device structure according to an embodiment of this application;

[0024] Figure 3 This is a schematic diagram of the opening component structure in an embodiment of this application;

[0025] Figure 4 This is a schematic diagram of the open heald frame structure according to an embodiment of this application;

[0026] Figure 5 This is a schematic diagram of the adjustable heald frame structure according to an embodiment of this application;

[0027] Figure 6 This is a schematic diagram illustrating the opening position in an embodiment of this application.

[0028] Figure 7 This is a schematic diagram of the opening state in an embodiment of this application.

[0029] The attached diagram identifies the following: 1. Guide bracket; 11. Vertical bracket; 12. Guide rail; 2. Open heald frame; 21. Open heald wire; 22. Open eyelet; 3. Adjusting heald frame; 31. Adjusting heald wire; 32. Adjusting eyelet; 4. Transmission assembly; 41. Drive arm; 42. Link 1; 43. Rotating arm; 431. Driving rod; 432. Driven rod; 44. Rotating shaft; 45. Link 2; 46. Link 3; 5. Drive mechanism; 51. Opening drive component; 52. Adjusting drive component; 6. Greige fabric; 7. Opening. Detailed Implementation

[0030] To better understand the above technical solutions, the following detailed description, in conjunction with the accompanying drawings and specific embodiments, will illustrate the technical solutions in detail. Obviously, the described embodiments are merely some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0031] Example 1

[0032] like Figure 2 , Figure 3 The diagram illustrates a shedding device for a rapier loom, comprising multiple shedding assemblies arranged equidistantly in a straight line along the warp direction. Each shedding assembly includes a guide bracket 1, a shedding heald frame 2, an adjusting heald frame 3, a transmission assembly 4, and a drive mechanism 5. The shedding heald frame 2 and the adjusting heald frame 3 are slidably mounted on the guide bracket 1, with the shedding heald frame 2 located closer to the rapier shaft of the rapier loom. The drive mechanism 5 is connected to both the shedding heald frame 2 and the adjusting heald frame 3 via the transmission assembly 4, driving them to move synchronously in opposite directions. The travel distance of each shedding assembly increases with the distance between the shedding assembly and the rapier shaft; that is, compared to the leftmost shedding assembly, the rightmost shedding assembly has a greater travel distance for both its shedding heald frame 2 and adjusting heald frame 3.

[0033] like Figure 4 , Figure 5 As shown, the guide bracket 1 includes two vertical brackets 11 installed side by side. Four guide rails 12 are vertically installed on the opposite side of the two vertical brackets 11, and the four guide rails 12 are symmetrically distributed in pairs.

[0034] like Figure 4 As shown, the two sides of the open heald frame 2 are connected to the guide rail 12 via sliders, allowing the open heald frame 2 to move up and down along the vertical support 11. Several open heald wires 21 are vertically installed inside the open heald frame 2, and an open eyelet 22 is fixed in the middle of each open heald wire 21. The positions of the open heald wires 21 in different open heald assemblies are staggered.

[0035] like Figure 5 As shown, the two sides of the adjusting heald frame 3 are connected to the guide rail 12 via sliders, allowing the adjusting heald frame 3 to move up and down along the vertical support 11. Several adjusting heald wires 31 are vertically installed inside the adjusting heald frame 2. The number and position of the adjusting heald wires 31 are the same as the number and position of the opening heald wires 31 on the same shedding assembly. Adjusting eyelets 32 are fixed on the adjusting heald wires 31. There is a height difference between the adjusting eyelets 32 and the opening eyelets 22, which increases with the increase of the distance between the shedding assembly and the rapier loom rapier. Preferably, the adjusting heald wires 31 are elastic fibers, which can buffer the warp yarns during the shedding process and prevent warp yarn breakage.

[0036] like Figure 4 , Figure 5As shown, the drive mechanism 5 includes an opening drive component 51 and an adjustment drive component 52, both of which are servo motors. The opening drive component 51 is connected to the opening heald frame 2 via the transmission assembly 4, and is used to drive the opening heald frame 2 to move up and down reciprocally. The adjustment drive component 52 is connected to the adjustment heald frame 3 via the transmission assembly 4, and is used to drive the adjustment heald frame 3 to move up and down reciprocally.

[0037] like Figure 4 , Figure 5 As shown, each transmission component 4 includes a drive arm 41, a first connecting rod 42, a rotating arm 43, a rotating shaft 44, a second connecting rod 45, and a third connecting rod 46. One end of the drive arm 41 is fixedly connected to the output shaft of the servo motor, and the other end of the drive arm 41 is rotatably connected to one end of the first connecting rod 42 via a revolute joint. The four rotating shafts 44 are fixed in pairs on the upper and lower sides of the guide bracket 1, and the rotating shafts 44 extend through the entire length of the opening device. The rotating arm 43 is an L-shaped structure formed by connecting the driving rod 431 and the driven rod 432. The connection points of the driving rod 431 and the driven rod 432 of the two rotating arms 43 are rotatably connected to the rotating shaft 44 via a revolute joint. One end of the driving rod 431 away from the rotating shaft 44 is rotatably connected to the other end of the connecting rod 42 via a rotating joint. One end of the driven rod 432 away from the rotating shaft 44 is rotatably connected to one end of the connecting rod 45 via a rotating joint. The other end of the connecting rod 45 is connected to the open heddle frame 2 or the adjusting heddle frame 3 via a rotating joint. Both ends of the connecting rod 46 are rotatably connected to the ends of the two driving rods 431 away from the rotating shaft 44 via rotating joints.

[0038] like Figure 4 As shown, when the opening drive member 51 rotates clockwise, it pushes the rotating arm 43 to rotate counterclockwise through the drive arm 41 and connecting rod 42, causing the connecting rod 45 to move downwards and the opening heald frame 2 to move downwards. When the opening drive member 51 rotates counterclockwise, it pulls the rotating arm 43 to rotate clockwise through the drive arm 41 and connecting rod 42, causing the connecting rod 45 to move upwards and the opening heald frame 2 to move upwards. Furthermore, the greater the rotation angle of the opening drive member 51, the greater the displacement distance of the opening heald frame 2.

[0039] like Figure 5 As shown, when the adjusting drive component 52 rotates clockwise, the drive arm 41 and connecting rod 42 push the rotating arm 43 to rotate clockwise, the connecting rod 45 moves downward, and the adjusting heddle frame 3 moves downward; when the adjusting drive component 52 rotates counterclockwise, the drive arm 41 and connecting rod 42 pull the rotating arm 43 to rotate counterclockwise, the connecting rod 45 moves upward, and the adjusting heddle frame 3 moves upward. Furthermore, the greater the rotation angle of the adjusting drive component 52, the greater the displacement distance of the adjusting heddle frame 3.

[0040] like Figure 6 As shown, as the distance between the open heald frame 2 and the fabric 6 increases, the opening stroke of the opening assembly gradually increases, so that the size of the opening 7 remains consistent and does not affect the extension of the rapier.

[0041] like Figure 7 As shown, taking the fourth opening component from the left as an example, when the opening heald frame 2 moves upward, the heald frame 3 is adjusted to move downward by the same distance simultaneously, so that the length of the warp yarn on the fourth opening component remains unchanged, thereby avoiding the problem of uneven warp tension caused by different movement strokes of different opening components.

[0042] Example 2

[0043] A method for opening the sheathing device of the above-mentioned rapier loom includes the following steps:

[0044] Step S1: Adjust the position of the open heald frame and the adjusting heald frame through the drive mechanism so that the position of the open heald eye and the adjusting heald eye coincide; adjusting the position of the open heald eye and the adjusting heald eye to coincide makes it easier to insert the warp yarn.

[0045] Step S2: Pass the warp yarns on the warp roller through the adjusting eyelets and the open eyelets in sequence, and then wrap them around the cloth roller to complete the warp yarn insertion.

[0046] Step S3: Adjust the position of the sheath frame and the adjusting frame using the drive mechanism, so that the position of the adjusting eye is higher than the position of the sheath frame. Furthermore, as the distance between the adjusting eye and the sheath increases, the height difference between the adjusting eye and the sheath frame gradually increases. Since the movement stroke of the sheath frame is greater with increasing distance from the sheath, the gradually increasing height difference between the adjusting eye and the sheath frame allows for a corresponding warp length to be reserved for the movement of the sheath frame.

[0047] Step S4: Tensile the warp yarns on each opening assembly, and control each opening assembly to perform the opening action through the drive mechanism.

[0048] The technical solutions provided in this application have at least the following technical effects or advantages:

[0049] 1. By setting up several independently controlled shedding components and gradually increasing the stroke of the shedding components as they move away from the rapier, the consistency of the shedding size is ensured, thereby increasing the number of shedding components and expanding the weaving process of the rapier loom.

[0050] 2. By setting up a heald frame with synchronous and opposite movements, the warp tension on each shedding assembly remains constant, thus avoiding the problem of uneven warp tension caused by different movement strokes of different shedding assemblies.

[0051] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms 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, and therefore should not be construed as a limitation on the scope of protection of this invention. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0052] 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 shedding device for a rapier loom, characterized in that, The system includes several sheathing assemblies arranged equidistantly in a straight line. Each sheathing assembly includes a guide bracket, a sheathing frame, an adjusting frame, and a drive mechanism. The sheathing frame is vertically mounted on the guide bracket and contains several sheathing heddles with sheathing eyes. The adjusting frame is vertically mounted on the guide bracket and is located on the side of the sheathing frame away from the rapier loom rapier. The adjusting frame contains adjusting heddles, which correspond one-to-one with the sheathing heddles and have adjusting eyes. The drive mechanism is connected to the sheathing frame and the adjusting frame, driving them to move synchronously in opposite directions. The travel distance of the drive mechanism increases with the distance between the sheathing assembly and the rapier loom rapier. There is a height difference between the adjusting eyes and the sheathing eyes, which also increases with the distance between the sheathing assembly and the rapier loom rapier.

2. The shedding device for a rapier loom according to claim 1, characterized in that, The guide bracket includes two vertical brackets arranged side by side, and a guide rail is vertically installed on the opposite side of the two vertical brackets. The open heald frame and the adjustable heald frame are respectively connected to the guide rail via sliders.

3. The shedding device for a rapier loom according to claim 1, characterized in that, The driving mechanism includes an opening driving component and an adjustment driving component. The opening driving component is connected to the opening heald frame via a transmission assembly and is used to drive the opening heald frame to move up and down reciprocally. The adjustment driving component is connected to the adjustment heald frame via a transmission assembly and is used to drive the adjustment heald frame to move up and down reciprocally.

4. The shedding device for a rapier loom according to claim 3, characterized in that, Both the opening drive component and the adjustment drive component are motors.

5. The shedding device for a rapier loom according to claim 4, characterized in that, The transmission assembly includes a drive arm, a first connecting rod, a rotating arm, a rotating shaft, and a second connecting rod. One end of the drive arm is fixedly connected to the output shaft of the motor, and one end of the first connecting rod is rotatably connected to the other end of the drive arm. The rotating arm includes a driving rod and a driven rod. One end of the driving rod is connected to one end of the driven rod, and the connection between the driving rod and the driven rod is rotatably connected to the rotating shaft. The end of the driving rod away from the rotating shaft is rotatably connected to the other end of the first connecting rod, and the end of the driven rod away from the rotating shaft is rotatably connected to one end of the second connecting rod. The other end of the second connecting rod is connected to the open heald frame or the adjusting heald frame.

6. The shedding device for a rapier loom according to claim 5, characterized in that, There are two rotating arms, two rotating shafts, and two connecting rods, and a connecting rod three connects the two rotating arms.

7. The shedding device for a rapier loom according to claim 1, characterized in that, The adjusting heddle yarn is an elastic fiber.

8. A method for opening the sheathing device of a rapier loom according to any one of claims 1-7, characterized in that, Includes the following steps: Step S1: Adjust the position of the open heald frame and the adjusting heald frame through the drive mechanism so that the position of the open heald eye coincides with the position of the adjusting heald eye; Step S2: Pass the warp yarns on the warp drum through the adjusting eyelets and the open eyelets in sequence, and then wind them onto the cloth roller; Step S3: Adjust the position of the open heald frame and the adjusting heald frame through the drive mechanism so that the position of the adjusting heald eye is higher than the position of the open heald eye. As the distance between the adjusting heald eye and the rapier of the rapier loom increases, the height difference between the adjusting heald eye and the open heald eye gradually increases. Step S4: Tensile the warp yarns on each opening assembly, and control each opening assembly to perform the opening action through the drive mechanism.

Images