Weft insertion mechanism of loom

Abstract

The invention provides a weft insertion mechanism of a loom, and relates to the technical field of weaving of looms, the weft insertion mechanism comprises a mounting column and a plurality of rows of bobbin racks mounted on the side surface of the mounting column in a surrounding manner, one end of each bobbin rack is fixedly connected with an adjusting mechanism, and the adjusting mechanism comprises a shifting tube fixed with the bobbin rack; one end of the push disc deviating from the shifting tube is rotationally connected with a knob; a sliding block is fixed to the end, away from the push disc, of the shifting pipe, a clamping block is arranged in one side of the sliding block in a sliding fit mode, and one side of the clamping block can be clamped into a corresponding clamping groove formed in the side wall of the mounting column after being exposed out of the sliding block. The adjusting mechanism further comprises a screw rod rotationally installed in the shifting pipe, the screw rod is sleeved with a sliding disc in a threaded mode, and the sliding disc is fixedly connected with the clamping block. When the push disc is attached to the end of the shifting pipe, the rotary knob is rotated to enable the screw to rotate automatically so as to drive the clamping block to be clamped into or withdrawn from the clamping groove. The positions of the spool frames on the device body can be adjusted, and the situation that the fed spools cannot be fed normally due to the fact that the intervals of the spool frames are not consistent is avoided.

Description

Technical Field

[0001] This invention relates to the field of weaving machine technology, and more particularly to the weft insertion mechanism of a weaving machine. Background Technology

[0002] In existing technologies, weaving on conventional looms typically requires the use of a weft insertion device to insert the weft yarn. Before insertion, the weft yarn is usually placed in the form of a bobbin on the bobbin holder of the weft insertion device, also known as the loading of the weft insertion device. However, the bobbin holders used in traditional loom weft insertion devices usually adopt a relatively simple integral structure, which lacks good adjustment performance. Since the bobbins loaded with different lengths of yarn often have different sizes, if the spacing of the bobbin holder is not consistent when loading larger bobbins, it is easy to cause larger bobbins to fail to be loaded properly. It is often necessary to replace them with smaller bobbins that can be placed normally, which is cumbersome and time-consuming, inevitably affecting the weft insertion operation of the loom and seriously affecting the loading efficiency of the weft insertion device.

[0003] Furthermore, in existing technologies, the yarn bobbin frame used in weft insertion devices is often directly fitted onto a cylindrical rod. While the structure is simple, the bobbin is prone to wobbling when the yarn is pulled out, causing the yarn to wobble as it is drawn out, affecting subsequent weaving. Moreover, the wobbling between the bobbin wall and the cylindrical rod further exacerbates wear on the bobbin hole, leading to increasingly poor coaxial rotational precision and more severe wobbling, thus further accelerating wear on the bobbin hole, creating a snowballing effect. Existing technologies, in order to reduce the degree of wobbling during bobbin rotation and improve the flexibility and reliability of coaxial rotation, set a small clearance between the bobbin hole and the cylindrical rod. However, this makes bobbin installation very difficult, reduces installation efficiency, and requires unique bobbin models and high dimensional accuracy, thus lacking versatility. Summary of the Invention

[0004] This invention proposes a weft insertion mechanism for a loom to solve the problem that the yarn bobbin used in traditional weft insertion devices in the prior art is prone to failure to feed materials properly because its position cannot be adjusted conveniently and accurately.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a weft insertion mechanism for a loom, comprising a mounting column with several rows of yarn bobbins fixedly surrounding it, an adjustment mechanism for moving the yarn bobbins fixedly connected to one end of each yarn bobbin, the adjustment mechanism comprising a push tube fixed to one end of the yarn bobbins and extending outward toward the mounting column, a push plate coaxially connected to one side of the push tube, a knob rotatably connected to the side of the push plate away from the push tube via a rotating rod; a slider fixedly connected to the end of the push tube away from the push plate, a locking block slidably fitted into one side of the slider along the axis of the push tube, normally, one side of the locking block protrudes from the slider and engages with a corresponding locking groove opened in the side wall of the mounting column, all locking grooves are spaced apart at the bottom of the rectangular grooves on the side wall of the mounting column, the rectangular grooves are for the slider to be installed in a linear sliding fit; The adjustment mechanism of the present invention further includes a screw rotatably installed in the dial tube, a slide plate threaded onto the screw, and the slide plate being fixed to the locking block by a connecting plate simultaneously slidably installed in the slider and the dial tube, so that when the push plate is in contact with the end of the dial tube, turning the knob can cause the screw to rotate, thereby driving the locking block to extend or retract into the slider, and when the slide plate moves to contact one end of the dial tube, the locking block is locked in place in the locking groove.

[0006] Furthermore, the end of the screw is rotatably mounted in a first mounting plate fixed inside the dial tube; one end of the dial tube is closed by a second mounting plate fixedly connected to it, and a rotating block is fixedly connected to one end of the rotating rod passing through the second mounting plate. The rotating block can be inserted into the positioning groove on the end face of the screw to rotate the screw.

[0007] Furthermore, a reset mechanism is provided on the side of the push plate facing the dial tube. The reset mechanism includes several slide rods fixedly connected to one side of the push plate. Springs are sleeved on the outer side of the slide rods. A limit plate is fixedly connected to one end of the slide rods passing through the second mounting plate. The springs cause the push plate to separate from the dial tube under normal conditions.

[0008] Furthermore, the second mounting plate has several sliding holes for sliding installation of the slide rod, and all the sliding holes are arranged in a circular array around the center of the second mounting plate. The rotating block is located at the center of all the limiting plates opposite to the second mounting plate. One end of the spring is welded to one side of the second mounting plate, and the other end is welded to one side of the limiting plate.

[0009] Furthermore, the slider is slidably sleeved on a pair of guide rods, which are arranged in the rectangular groove along the extension direction of the rectangular groove to guide the slider to slide in a straight line; the slider is generally T-shaped, and the locking block is slidably installed on the protrusion in the center of the T-shaped structure, with the two guide rods passing through both sides of the protrusion of the T-shaped structure.

[0010] Furthermore, the yarn bobbin frame includes a base and a core tube vertically fixed in its center. Inside the core tube, several sliding pins are arranged along its length. One end of each sliding pin is located inside the core tube, and the other end protrudes outside the core tube and is fixed with a tube-shaped support. A cylindrical insert rod is also coaxially threaded inside the core tube. When the insert rod is inserted into the core tube, it pushes all the sliding pins to slide out synchronously, thus coaxially rotating the yarn bobbin on the outside of the core tube.

[0011] Furthermore, the sliding column has a hemispherical end inside the core tube. A tensile spring is coaxially sleeved on the sliding column between the support and the core tube. One end of the tensile spring is connected to the inner surface of the support and the other end is connected to the outer surface of the core tube. When the support contacts the inner wall of the yarn tube, the tensile spring is in a stretched state. The insertion rod has an enlarged column with the same number of turns as the sliding column. The two ends of the enlarged column are convex arc-shaped. When the insertion rod is fixed in place, the enlarged column is located at the center of its corresponding turn of the sliding column, so as to simultaneously push the sliding column to slide. The insertion rod above the top enlarged column has a stud section. The stud section is threadedly engaged with the threaded hole section in the upper part of the core tube. The axial movement and fixation of the insertion rod are realized through the threaded engagement.

[0012] Furthermore, the top of the insert rod has a blind hole with a polygonal cross-section, and the top of the core tube is threaded with a locking cap. A wrench rod is fixed in the center of the inside of the locking cap. When the locking cap is threaded onto the top of the core tube, the wrench rod is inserted into the blind hole and rotates together with the insert rod until the expanding column pushes the sliding column to a position where the yarn bobbin can rotate freely around the core tube through the support.

[0013] Furthermore, a rotating ring is rotatably installed at the top center of the chassis, allowing the bottom of the yarn tube to contact it. The ring is rotatably installed around the bottom of the core tube, and its upper and lower ends are respectively rotatably connected to the bottom of the chassis and a fastening nut via steel balls. The fastening nut is threaded onto the thread near the bottom of the insertion rod, so that the rotation of the rotating ring can be adjusted flexibly by rotating the fastening nut.

[0014] Furthermore, the connection between the chassis and the core tube is changed from a coaxial fixed connection to a coaxial rotatable connection, and the core tube is rotatably mounted on the chassis near its bottom end, so that when the insert rod is fixed inside the core tube, the yarn bobbin, core tube, and slide column are fixed as an integral structure; it also includes a mandrel, which is coaxially fixed on the chassis, and the insert rod is coaxially rotatably sleeved on the mandrel, so that the integral structure can rotate around the mandrel.

[0015] Compared with the prior art, the advantages and positive effects of the present invention are as follows: This invention, by setting an adjustment mechanism, allows for position adjustment of the yarn bobbin holder on the mounting column of the device body. Pushing the push plate inserts the rotating block into the screw, and rotating the knob uses the screw, slide plate, and connecting plate to move the locking block out of the mounting column. This allows the drag tube to adjust the position of the yarn bobbin holder, providing excellent position adjustment for the yarn bobbin holder on the device body. This prevents the yarn bobbins from failing to feed properly due to misalignment of the yarn bobbin holder spacing, reduces the probability of the weft insertion operation of the loom being affected by the inability to feed the yarn bobbins properly, reduces the time spent feeding the device body, and improves the normal feeding efficiency of the device body. Attached Figure Description

[0016] Figure 1 A perspective view of a weft insertion mechanism for a loom provided by the present invention; Figure 2 A three-dimensional view of the installation column; Figure 3 This is a 3D view of the tube; Figure 4 This is a three-dimensional sectional view of the tube. Figure 5 This is an axial sectional view of the dial tube and slider; Figure 6 This is a structural diagram of a card block; Figure 7 Diagram showing the installation structure of the knob and push plate rotation; Figure 8 A structural diagram showing the yarn bobbins installed on the yarn bobbin holder; Figure 9 Here is a structural diagram of the insertion rod; Figure 10 A structural diagram of the yarn bobbin structure with a mandrel; Figure 11 A schematic diagram of a mandrel structure; Figure 12 This is a schematic diagram of the cross-section of the core tube.

[0017] Legend: Device body 1, mounting column 2, rectangular groove 21, marking line 22, slot 211, yarn tube frame 3, core tube 31, base plate 32, adjusting mechanism 4, push tube 41, push plate 42, knob 43, slider 44, guide rod 45, locking block 46, reset mechanism 47, slide rod 471, spring 472, limit plate 473, connecting plate 48, slide plate 49, screw 410, first mounting plate 411, rotating rod 412, rotating block 413, second mounting plate 414, sliding column 5, insertion rod 6, expansion column 61, screw section 62, blind hole 63, support tile 7, tensile spring 8, yarn tube 9, locking cap 10, wrench rod 11, rotating ring 12, fastening nut 13, steel ball 14, spindle 15, tightening spring 16, guide block 17. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] As one embodiment of the present invention, a weft insertion mechanism for a weaving machine is now described in detail, such as... Figure 1 As shown, a device body 1 is mainly installed on the weaving guide thread. The weft insertion mechanism of this loom is fixedly connected to a mounting column 2 on one side of the device body 1. (See also...) Figures 2-4 The main body of the mounting column 2 is a cylindrical structure. A yarn tube frame 3 for holding yarn tubes is fixedly connected to the sides of the mounting column 2. An adjustment mechanism 4 is fixedly connected to one end of the yarn tube frame 3. The adjustment mechanism 4 allows the yarn tube frame 3 to be moved and fixed, thereby adjusting the installation position of the yarn tube frame 3 and avoiding interference. In specific manufacturing, such as... Figure 3 It includes a guide tube 41 fixedly connected to one end of the yarn bobbin 3. The guide tube 41 can serve as a handle for moving the yarn bobbin 3. A push plate 42 is axially slidably connected to one side of the guide tube 41. A knob 43 for driving the screw 410 (mentioned later) is rotatably connected to one side of the push plate 42. A slider 44 that can slide on the mounting post 2 is fixedly connected to the side of the guide tube 41 away from the push plate 42. A guide rod 45 is fixedly connected to the side of the mounting post 2 in a direction parallel to the axial direction so that the slider 44 can slide linearly. A locking block 46 slides along the axial direction of the guide tube 41 on one side of the slider 44. A reset mechanism 47 is provided on the side of the push plate 42 facing the guide tube 41 to realize the state in which the push plate 42 and the guide tube 41 are normally separated from each other. Specifically, a connecting plate 48 is fixedly connected to one side of the locking block 46. The connecting plates 48 can be configured as a pair. A slide plate 49 is fixedly connected to one end of the connecting plate 48, and the locking block 46 is fixed to the other end. Inside the dial tube 41, a screw 410 is rotatably mounted coaxially. Specifically, the screw 410 is rotatably mounted inside the first mounting plate 411, which is fixed inside the dial tube 41. Furthermore, a rotating rod 412 is fixedly connected to one side of the knob 43. A rotating block 413 is fixedly connected to one end of the rotating rod 412 that extends into the dial tube 41, so that it can be driven by the screw 410 during movement.

[0020] In this embodiment, to achieve the aforementioned linear sliding installation of the yarn tube frame 3 and the adjusting mechanism 4, the specific manufacturing process is as follows: Figure 2As shown, a rectangular groove 21 adapted to the slider 44 can be opened on the side of the mounting post 2. By opening the rectangular groove 21, the slider 44 can slide on the mounting post 2. A guide hole adapted to the guide rod 45 is opened on one side of the slider 44. By opening the guide hole, the slider 44 can slide on the outer surface of the guide rod 45. The guide rod 45 provides good balance and guidance for the sliding of the slider 44. At the same time, a slot 211 adapted to the locking block 46 is opened at the bottom of the rectangular groove 21. For example, when the locking block 46 is a rectangular block, the slot 211 is a rectangular slot that is interference-fitted with it. In order to better and faster positioning and installation, such as Figure 6 As shown, the locking block 46 can be made with a certain taper at its free end, and the locking groove 211 is also made with a corresponding taper for insertion and fixation. By opening the locking groove 211, the locking block 46 can be inserted into the interior of the mounting post 2, so that the slider 44 has good fixation on the mounting post 2 and good positioning. Compared with the traditional detachable connection structure that directly uses bolts, it can improve the installation accuracy of the slider 44, which is conducive to the precise arrangement of yarn and provides a prerequisite for precision spinning and weaving.

[0021] In the above embodiments, more specifically, such as Figure 4 As shown, a groove adapted to the locking block 46 is provided on one side of the slider 44. In practice, the slider 44 can be made into a roughly T-shaped slider structure. A corresponding groove is provided at the important protrusion of this slider. By providing the groove, the locking block 46 can be completely moved into the inside of the slider 44 and disengaged from the mounting post 2. The bottom of the groove of the slider 44 and the end of the push tube 41 near the slider 44 are provided with a first through hole adapted to the connecting plate 48. By providing the first through hole, the connecting plate 48 can slide through the slider 44 and the push tube 41. In addition, the slider 44 can also have rectangular strip-shaped guide blocks 17 integrally formed on both sides. The guide blocks 17 can slide and engage with the guide grooves provided on the side walls of the corresponding rectangular strip grooves 21 to prevent the slider 44 from completely separating from the mounting post 2. At the same time, it is convenient to operate the above-mentioned adjustment mechanism. This is most suitable for situations where the yarn bobbin frame does not need to be removed frequently under normal circumstances. If the yarn bobbin frame needs to be frequently lifted and replaced, it is not advisable to set the guide blocks 17 to restrict the connection relationship, thus simplifying the usage process. To facilitate the slider 44 to quickly reach the corresponding slot 211, several marking lines 22 can be evenly arranged along the length of the slot at the opening of the rectangular slot 21. When the slider slides to the corresponding marking line 22, the knob 43 can be directly pressed and rotated to quickly fix the yarn tube frame in the new position.

[0022] During installation, the rotating rod 412 is rotatably mounted on the push plate 42 and simultaneously rotatably mounted on the second mounting plate 414. The screw 410 has a positioning groove at one end facing the rotating block 413, which is adapted to the rotating block 413. The positioning groove can be as follows: Figure 5 The hexagonal groove shown allows the rotating block 413 to be inserted into the screw 410 through the positioning groove, so that when the rotating rod 412 rotates, the rotating block 413 can drive the screw 410 to rotate.

[0023] As one of the specific implementation structures, such as Figures 3-4 As shown, the reset mechanism 47 in this embodiment specifically includes a slide rod 471 fixedly connected to one side of the push plate 42. A spring 472 is coaxially sleeved on the rod segment of the slide rod 471 that passes through the second mounting plate 414. One end of the slide rod 471 passes through the second mounting plate 414 and is fixedly connected to a limiting plate 473. The spring 472, through contact with the limiting plate 473 and the second mounting plate 414, restricts the normal initial position of the push plate 42 and the knob 43. In specific manufacturing, one end of the spring 472 is welded to one end of the second mounting plate 414, and the other end of the spring 472 is welded to one end of the limiting plate 473. By setting the spring 472 to provide sufficient elastic force, the limiting plate 473 can actively reset with the help of the elastic force of the spring 472 after it moves.

[0024] When in use, if the yarn bobbins placed on the yarn bobbin frame 3 on the mounting column 2 cannot be fed normally due to the misalignment of the yarn bobbin frame 3, or if the spacing of the yarn leads does not meet the requirements, the position of the yarn bobbin frame 3 needs to be adjusted to ensure that the spacing of each yarn bobbin placed on the mounting column 2 meets the requirements of the lead wire spacing and fully satisfies the installation requirements that each yarn bobbin does not interfere with the others.

[0025] When adjusting the position of the yarn package 3, the fixed connection between the yarn package 3 and the mounting post 2 must first be released. At this time, press the knob 43 or push the push plate 42 to move it. The push plate 42 moves closer to the dial tube 41, and during this movement, it drives the rotating rod 412 and the sliding rod 471 to move. The sliding rod 471 slides on the second mounting plate 414 and drives the limiting plate 473 to move. The spring 472 is stretched due to the pushing force. As the push plate 42 is continued to be pressed and moved forward, the rotating block 413 will contact the screw 410 inside the dial tube 41. If the rotating block 413 is not aligned with the positioning groove at the end of the screw 410 and cannot enter the positioning groove, then the push plate 42 cannot contact the end face of the push tube 41. In this case, it is necessary to start rotating the knob 43. The purpose is to make the rotating block 413 face the positioning groove. For example, if they are all hexagonal, they must face each other so that they can be inserted. This allows the rotating block 413 to be smoothly inserted into the screw 410 and allows the push plate 42 to contact the push tube 41. When the push plate 42 can contact the push tube 41, it means that the rotating block 413 is inserted into the positioning groove. Continue to press and rotate the knob. Button 43 rotates the screw 410. As the screw 410 rotates, the slide plate 49 moves away from the slider 44 inside the dial tube 41. Under the axial force generated by the screw 410, the connecting plate 48 drives the locking block 46 to pull out of the slot 211 and retract completely into the slider 44, thus releasing the fixed relationship between the slider 44 and the mounting post 2. This allows the yarn tube frame 3 to move. Then, hold the dial tube 41 and push the yarn tube frame 3 to slide linearly on the mounting post 2 to the appropriate position. Finally, reverse the knob 43. When the screw 410 reverses, the slide plate 49 moves closer to the slider 44, causing the locking block 46 to move out from one side of the slider 44. Under the axial thrust generated by the screw 410, one side of the locking block 46 is pressed into the locking groove 211, achieving an interference fit and fixing it. This allows the yarn bobbin frame 3 to complete the adjustment and fixing of the new position. The yarn bobbin that needs to be inserted can be put on the yarn bobbin frame 3, avoiding interference with the installation of the corresponding size yarn bobbin due to the small distance between two adjacent yarn bobbin frames 3. This completes the feeding, or better adapts to the spacing requirements of multiple yarn groups during spinning and weaving.

[0026] As another specific implementation structure, in order to ensure that the yarn bobbin 9 can rotate freely around a predetermined axis during yarn feeding, avoiding excessive shaking of the yarn bobbin 9 during rotation, and preventing the yarn bobbin 9 from easily getting stuck, so as to better improve the yarn accuracy, the yarn bobbin frame 3 is specially made as follows. Figure 8As shown, the yarn bobbin frame 3 consists of a base 32 and a core tube 31. The core tube 31 is vertically fixed at the center of the top surface of the base 32, forming a stable integrated structure with the base 32. Inside the core tube 31, several rings of sliding pillars 5 are evenly arranged along its length. Each ring of sliding pillars 5 is evenly distributed around the axis of the core tube 31. One end of the sliding pillar 5 is located inside the core tube 31, and the other end passes through the side wall of the core tube 31 and protrudes outside the core tube 31. A tubular support plate 7 is fixedly connected to the protruding end so that the yarn bobbin 9 can rotate around the circular side surface formed by the support plate 7. Inside the core tube 31, a cylindrical insert rod 6 is coaxially arranged. The insert rod 6 is threadedly fixed to the core tube 31. When the insert rod 6 is inserted into the core tube 31 and screwed inward, the insert rod 6 will simultaneously push all the sliding pins 5 to slide outward from the core tube 31 until the outer cylindrical sides of all the support tiles 7 are in contact with the inner wall of the yarn bobbin 9 surrounding the core tube 31, ideally achieving smooth contact. At this point, the yarn bobbin 9 can wrap around the support tiles 7 to form a... Figure 12 The circular array structure shown can rotate freely, thereby achieving coaxial and flexible rotation around the core tube 31 as the axis, ensuring that the yarn can be released smoothly and accurately during the weft insertion process.

[0027] This embodiment, based on the above embodiment, provides a detailed description of the sliding column 5, the insertion rod 6, and related structures. During manufacturing, as follows... Figure 8 As shown, the end of the sliding column 5 located inside the core tube 31 can be made hemispherical, which can reduce the friction when the insert rod 6 pushes the sliding column 5, making the sliding column 5 slide more smoothly. At the same time, when contacting different positions of the hemispherical end of the sliding column 5, the length of the sliding column 5 extending beyond the core tube 31 can be adjusted, thereby realizing the installation adjustment of yarn bobbins 9 with different apertures. In practice, it is advisable to coaxially sleeve a cylindrical tensile spring 8 on the sliding column 5 between the support 7 and the core tube 31. One end of the tensile spring 8 is fixedly connected to the inner side of the support 7, and the other end is fixedly connected to the outer side of the core tube 31. When the support 7 contacts the inner wall of the yarn bobbin 9 and supports the yarn bobbin 9 to achieve centering installation, the tensile spring 8 is in a stretched state, which can provide a continuous reverse tension to the support 7, ensuring a more stable contact between the support 7 and the inner wall of the yarn bobbin 9. For more details, please refer to [link to relevant documentation]. Figures 8-9 The insert rod 6 is equipped with enlarged posts that correspond one-to-one with the number of turns of the sliding pin 5. Both ends of each enlarged post are designed with raised arc surfaces to facilitate sliding contact with the corresponding ends of the sliding pin 5. When the insert rod 6 is inserted into the core tube 31, rotating the insert rod 6 achieves connection by screwing it into the core tube 31 through a threaded fit. Furthermore, when the insert rod 6 is rotated to the corresponding position, each enlarged post is precisely located at the center of its corresponding turn of the sliding pin 5. For example... Figure 8As shown, a uniform thrust can be applied to all sliding pillars 5 of the ring simultaneously, pushing all sliding pillars 5 to slide outward synchronously to the required position to match the aperture of the yarn bobbin 9. Above the topmost enlarged pillar, a stud section 62 is integrally provided on the insert rod 6. This stud section 62 cooperates with the pre-set threaded hole section inside the upper part of the core tube 31 to achieve the above-mentioned threaded connection with the core tube 31. By rotating the insert rod 6, the stud section 62 and the threaded hole section undergo relative threaded movement, thereby realizing the axial movement and fixed connection of the insert rod 6 within the core tube 31, precisely controlling the supporting force of the support bracket 7 on the yarn bobbin 9, and controlling the flexibility of coaxiality and relative rotation. In this embodiment, as Figure 8 As shown, a polygonal blind hole 63, such as a hexagonal blind hole 63, is provided at the top of the insertion rod 6. The shape of the blind hole 63 is adapted to the cross-section of the wrench rod 11 mentioned below, ensuring that the two can be stably engaged and transmit rotational force. At the top of the core tube 31, a locking cap 10 is threadedly fitted. A wrench rod 11 is fixedly connected to the center of the inside of this locking cap 10. The size of the wrench rod 11 matches the blind hole 63 at the top of the insertion rod 6, realizing the function of rotating the insertion rod 6.

[0028] In one embodiment, when installing the yarn bobbin 9, the locking cap 10 is threaded onto the top of the core tube 31 and rotated. During this process, the wrench lever 11 is inserted into the blind hole 63 at the top of the insert rod 6, causing the insert rod 6 to rotate together. This causes the stud section 62 of the insert rod 6 to undergo threaded transmission with the threaded hole section of the core tube 31, thereby realizing the axial movement of the insert rod 6. When the locking cap 10 is tightened, the enlarged column on the insert rod 6 also pushes the sliding column 5 to move to the preset position. At this time, the yarn bobbin 9 can rotate freely and smoothly around the core tube 31 through the support 7, completing the fixing operation of the insert rod 6. The operation is convenient and the fixing is reliable. To improve versatility, a tightening spring 16 that abuts against the insertion rod 6 can be connected inside the blind hole 63. This ensures that the locking cap 10 remains relatively stable during rotation and will not easily loosen. This allows the insertion rod 6 to remain relatively fixed when it moves down to different positions, that is, when the arc surface of the expanded column contacts the hemisphere of the sliding column 5, so as to correspond to the sliding column 5 sliding out different lengths to adapt to yarn tubes 9 with different apertures.

[0029] In this embodiment, the structure of the chassis 32 will be optimized to improve the flexibility of the rotation of the yarn tube 9 when the bottom end of the yarn tube 9 is flush with the surface of the chassis 32. For example... Figure 8At the top center of the chassis 32, a rotating ring 12 is rotatably mounted. The rotating ring 12 is arranged around the bottom end of the core tube 31, allowing the bottom end of the yarn bobbin 9 to contact the top end of the rotating ring 12. This is mainly because, in actual use, during the synchronous sliding of all the sliding pins 5, when the yarn bobbin 9, which is pre-fitted outside the core tube 31, is automatically centered, it is possible that after the yarn bobbin 9 is centered, its bottom end face does not contact the chassis 32, and both ends of the yarn bobbin 9 are in a free state. In this case, rotation is less likely to be affected. Interference from both ends is possible, but during automatic centering, the bottom surface of the yarn bobbin 9 may come into contact with the top surface of the base 32. In this case, as the yarn bobbin 9 rotates around the core tube 31, friction and collision may occur between the bottom of the yarn bobbin 9 and the top surface of the base 32. Therefore, the aforementioned rotating ring 12 is designed so that its top surface is part of the top surface of the base 32. When the bottom of the yarn bobbin 9 is flush with the top surface of the base 32, the rotating ring 12 can rotate with the yarn bobbin 9, ensuring flexible rotation. In the design, the rotating ring 12 can be mounted using bearings or by steel balls 14 installed at its upper and lower ends for easy assembly and maintenance. The upper steel ball 14 contacts the top of the rotating ring 12 and the bottom of the yarn bobbin 9, while the lower steel ball 14 contacts the bottom of the rotating ring 12 and the bottom of a fastening nut 13. The rolling action of the steel balls 14 reduces the frictional force during the rotation of the rotating ring 12. The fastening nut 13 is threaded onto the thread near the bottom of the insertion rod 6. When the fastening nut 13 is slightly rotated, the axial position of the fastening nut 13 on the insertion rod 6 can be adjusted, thereby adjusting the tightness of the steel balls 14 at the upper and lower ends of the rotating ring 12. This allows for adjustment of the rotational flexibility of the rotating ring 12, ensuring that the yarn cylinder 9 remains stable during rotation, avoiding jamming, and ensuring the smooth operation of weft insertion.

[0030] Finally, based on the above series of embodiments, this embodiment proposes a better implementation structure. To avoid wear caused by the relative rotation of the yarn bobbin 9 and the support 7, the connection relationship between the yarn bobbin 9 and the support 7 can be changed from relative rotation to fixed contact. In this case, only three support 7s per turn are needed to satisfy the self-centering function. The specific manufacturing is as follows: The connection relationship between the base 32 and the core tube 31 in the above embodiments is changed from a coaxial fixed connection to a coaxial rotating connection. That is, the core tube 31 is installed with free rotation at the top of the base 32. During installation, the core tube 31 is rotated and installed on the base 32 near the bottom end. Thus, when the insertion rod 6 is fixed in the corresponding position inside the core tube 31 by threaded engagement, the yarn bobbin 9, the core tube 31, the sliding column 5, and its support 7 are fixed as an integrated structure that can move synchronously together. At the same time, this embodiment also specifically requires that... Figure 11 As shown, a mandrel 15 is set up, such as Figure 10The mandrel 15 is coaxially fixed to the base 32, and the insert rod 6 must be coaxially rotatably fitted onto this mandrel 15 so that the aforementioned integrated structure can rotate around the mandrel. This avoids wear caused by the direct relative rotation between the inner wall of the yarn tube 9 and the surface of the support 7, thus improving practicality and reliability. The structural design of the mandrel 15 can be as follows: Figure 11 As shown, the thickness is adaptively designed according to the size of the corresponding element it passes through, forming a circular rod structure with unequal diameters. The rod section passing through the larger diameter element, such as at the bottom end of the core tube 31, and in the portion above and near the aforementioned stud section 62, is designed to be thicker to improve its reliability as the central axis guiding the rotation of the yarn bobbin 9.

[0031] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A weft insertion mechanism for a loom, characterized in that, The system includes a mounting column (2) and several rows of yarn tube frames (3) mounted around its side. One end of the yarn tube frame (3) is fixedly connected to an adjustment mechanism (4). The adjustment mechanism (4) includes a push tube (41) fixed to the yarn tube frame (3). One end of the push tube (41) is slidably connected to a push plate (42). The push plate (42) is rotatably connected to a knob (43) via a rotating rod (412) at the end away from the push tube (41). A slider (44) is fixed at the end of the push tube (41) away from the push plate (42). A locking block (46) is slidably fitted into one side of the slider (44). After the locking block (46) exposes the slider (44) on one side, it is inserted into the corresponding slot (211) opened on the side wall of the mounting column (2). All slots (211) are spaced apart at the bottom of the rectangular groove (21) on the side wall of the mounting column (2). The rectangular groove (21) allows the slider (44) to slide linearly. The adjustment mechanism (4) also includes a screw (410) rotatably installed in the dial tube. A slide (49) is threaded onto the screw (410), and the slide (49) is fixedly connected to the locking block (46). When the push plate (42) is in contact with the end of the dial tube (41), rotating the knob (43) can cause the screw (410) to rotate and drive the locking block (46) to engage or disengage from the slot (211).

2. The weft insertion mechanism of the loom according to claim 1, characterized in that: The end of the screw (410) is rotatably mounted in the first mounting plate (411) fixed inside the dial tube (41); one end of the dial tube (41) is closed by the second mounting plate (414) fixedly connected to it, and the end of the rotating rod (412) passing through the second mounting plate 414 is fixedly connected to a rotating block (413). The rotating block (413) can be inserted into the positioning groove on the end face of the screw (410) to rotate the screw (410).

3. The weft insertion mechanism of the loom according to claim 2, characterized in that: The push plate (42) is provided with a reset mechanism (47) on the side facing the dial tube (41). The reset mechanism (47) includes several slide rods (471) fixedly connected to one side of the push plate (42). A spring (472) is sleeved on the outside of the slide rod (471). One end of the slide rod (471) passes through the second mounting plate (414) and is fixedly connected to a limit plate (473). The spring (472) makes the push plate (42) separate from the dial tube (41) under normal conditions.

4. The weft insertion mechanism of the loom according to claim 3, characterized in that: The second mounting plate (414) has a plurality of sliding holes for sliding mounting of the slide rod (471). All the sliding holes are arranged in a ring array around the center of the second mounting plate (414). The rotating block (413) is located at the center of one end of all the limiting plates (473) away from the second mounting plate (414). One end of the spring (472) is welded to one side of the second mounting plate (414), and the other end is welded to one side of the limiting plate (473).

5. The weft insertion mechanism of the loom according to claim 3, characterized in that: The slider (44) is slidably sleeved on a pair of guide rods (45). The guide rods (45) are arranged in the rectangular groove (21) along the extension direction of the rectangular groove (21) to guide the slider (44) to slide in a straight line. The slider is generally a T-shaped structure. The locking block (26) is slidably installed on the protrusion in the center of the T-shaped structure. The two guide rods (45) pass through both sides of the protrusion of the T-shaped structure.

6. The weft insertion mechanism of the loom according to claim 1, characterized in that: The yarn tube frame (3) includes a base (32) and a core tube (31) vertically fixed in the center. Inside the core tube (31) are several elastically sliding pins (5) installed along its length. One end of the pin (5) is inside the core tube (31), and the other end protrudes outside the core tube (31) and is fixed with a tube-shaped support tile (7). A cylindrical insert rod (6) is also coaxially threaded inside the core tube (31). When the insert rod (6) is inserted into the core tube (31), it pushes all the pins (5) to slide out synchronously, so that the outer cylindrical side of the support tile (7) contacts the inner wall of the yarn tube (9).

7. The weft insertion mechanism of the loom according to claim 6, characterized in that: The insert (6) has an number of enlarged columns (61) that are the same as the number of turns of the sliding column (5). The two ends of the enlarged columns (61) are convex arc-shaped. When the insert (6) is fixed in place, each enlarged column (61) is located at the center of its corresponding turn of the sliding column (5) so as to simultaneously push the sliding column (5) to slide. The part of the insert (6) above the topmost enlarged column (61) is threaded into the core tube (31).

8. The weft insertion mechanism of the loom according to claim 7, characterized in that: The top of the insert (6) has a non-circular blind hole (63), and the top of the core tube (31) is threaded with a locking cap (10). A wrench rod (11) is fixed in the center of the inside of the locking cap (10). When the locking cap (10) is threaded onto the top of the core tube (31), the wrench rod (11) is inserted into the blind hole (63) and rotates together with the insert (6) until the expanding column (61) pushes the sliding column (5) to contact the inner wall of the yarn tube (9).

9. The weft insertion mechanism of the loom according to claim 8, characterized in that: The top center of the chassis (32) is rotatably mounted with a rotating ring (12) that can be contacted by the bottom end of the yarn tube (9). The rotating ring (12) is rotatably mounted around the bottom end of the core tube (31).

10. The weft insertion mechanism of a loom according to any one of claims 6-9, characterized in that: The connection between the chassis (32) and the core tube (31) is changed from a coaxial fixed connection to a coaxial rotating connection, and the core tube (31) is rotatably mounted on the chassis (32) at the bottom end, so that when the insert rod (6) is screwed and rotated to a predetermined position inside the core tube (31), the yarn cylinder (9), the core tube (31) and the slide column (5) are fixed as an integral structure. It also includes a mandrel (15) which is coaxially fixed on the chassis (32), and the insert (6) is coaxially rotatably sleeved on the mandrel (15) so that the integrated structure can rotate around the mandrel.

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