A thread accumulator

Abstract

The utility model discloses a kind of yarn accumulators, to solve the problem of air coil out of control in prior art, detection contact piece is easy to entangle flying wire, it includes motor protection shell, motor, winding disc, yarn storage drum, shroud, the front end of the yarn storage drum is provided with the air coil rupture cover of conical cylinder, the taper tip one end of the air coil rupture cover is connected with yarn outlet nozzle, the front end outside of the yarn storage drum is equipped with yarn protection cylinder, the yarn protection cylinder is connected with the air coil rupture cover and is integrated, shroud is equipped with sensing assembly, U-shaped protective fence is arranged under sensor seat;The air coil rupture cover can break and rewind air coil, stabilize tension, and yarn protection cylinder protects yarn;U-shaped protective fence forms physical barrier, prevent flying wire from entangling detection contact piece, and do not affect contact piece detection yarn amount.The utility model keeps original sensing accuracy and compactness while improving weft supply stability and equipment reliability, applicable to large circular machine, rapier loom etc.

Description

Technical Field

[0001] This utility model belongs to the field of textile machinery technology, specifically relating to a weft storage device used to realize weft yarn storage and stable yarn supply during the textile weaving process. Background Technology

[0002] As a core component for stable weft supply in the textile machinery field, the performance of the weft feeder directly affects the weaving efficiency and fabric quality of the loom. Especially in equipment such as circular knitting machines and economical rapier looms, stringent requirements are placed on the tension stability, detection accuracy, and structural compactness of the weft feeder.

[0003] The applicant has previously developed and obtained an authorized invention patent (publication number: CN110714262B) to address the technical shortcomings of traditional weft feeders. This patent discloses a weft feeder sensing component and a weft feeder. By setting up three sets of probes—short probe, medium probe, and long probe—in conjunction with detection contact plates, and combining them with photoelectric sensors on the motor control board, it achieves precise control of motor start / stop and speed. At the same time, it innovatively designs a buffer spring sheet, a longitudinally adjustable adjustment component, and a gravity block, which effectively solves the problems of unstable detection signals, redundant probe swing, and inability to adapt to different yarn thicknesses in traditional weft feeders. Furthermore, the compact structural layout meets the space constraints of circular knitting machines, significantly improving the adaptability and operational stability of the weft feeder.

[0004] However, this patented technology has shortcomings in practical applications, specifically as follows: 1. During the weft unwinding process, due to the lack of an effective air ring control structure at the front end of the yarn storage drum, the weft yarn easily forms an unstable air ring. This air ring causes severe fluctuations in weft yarn tension, which not only easily leads to weft yarn stretching deformation and breakage, but also causes unstable yarn supply speed, resulting in quality problems such as weft shrinkage and weft breakage in the fabric, seriously affecting weaving efficiency and product qualification rate; 2. The probe of this patent needs to be suspended downward through the sensor seat probe hole on the radially upper side of the yarn storage drum, forming an exposed structure. Under the influence of factors such as the impact of the rapier weft insertion start and stop, yarn hairiness, or elastic recoil of high-elastic yarn, the yarn is easy to deviate from the preset path and form flying wire. The exposed probe is very easy to be entangled by the flying wire, which on the one hand causes the probe to jam, causing the photoelectric sensor signal to fail, leading to motor misstart, yarn over-entanglement, or stoppage, resulting in weft supply interruption and other faults; on the other hand, it requires stopping the machine to disassemble the protective cover for cleaning, reducing production efficiency, and repeated operation can easily damage the connection structure between the probe and the probe rod, shortening the component life. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the defects in the prior art and provide a weft storage device. Without compromising the detection accuracy and structural compactness of the original sensing components, it effectively controls the air ring and protects the yarn by adding an air ring rupture cover and a sensing component protection component. This ensures the smoothness of yarn lead-out, reduces or minimizes the yarn flying outwards caused by the air ring, and achieves overall protection of multiple sets of detection contacts without affecting the detection contacts' perception of changes in the amount of yarn on the surface of the yarn storage drum and avoiding the yarn from getting tangled with the detection contacts due to flying threads.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a weft storage device, comprising a motor protective shell, a motor, a yarn winding disc, a yarn storage drum, and a protective cover. The motor is disposed inside the motor protective shell. The yarn winding disc is provided on the right side of the motor protective shell, and the yarn storage drum is connected to the yarn winding disc. The protective cover is connected from the upper side of the motor protective shell to the top of the yarn storage drum. The front end of the yarn storage drum is provided with a conical air ring rupture cover, the outer wall of which is fixedly connected to the protective cover, and one end of the conical tip is connected to a yarn outlet; a protective yarn tube is sleeved on the outer side of the front end of the yarn storage drum, and the protective yarn tube is connected in series with the air ring rupture cover to form an integral unit; a weft feeder sensing component is provided inside the protective cover, and an installation groove is opened on the side of the protective cover facing the yarn storage drum. An avoidance groove is opened on the protective yarn tube corresponding to the installation groove. The weft feeder sensing component is installed in the installation groove, and its sensing end protrudes downward and is distributed on the radial upper side of the yarn storage drum after passing through the avoidance groove.

[0007] Furthermore, the weft feeder sensing assembly includes a sensor base, a short probe, a middle probe, a long probe, and a probe contact. The sensor base has a transversely opened inner mounting groove. The bottom left, middle, and right sides of the inner mounting groove have left probe holes, middle probe holes, and right probe holes, respectively. The short probe, middle probe, and long probe are arranged side by side and coaxially connected to the left end of the sensor base via a pivot pin. The right ends of the short probe, middle probe, and long probe are located in the inner mounting groove, and the right ends of the short probe, middle probe, and long probe are respectively connected to probe contact, which serves as the sensing end of the weft feeder sensing assembly. Each probe contact extends downward through the left probe hole, the middle probe hole, and the right probe hole, and is distributed on the radially upper side of the yarn drum. At least one set of probe contact from right to left passes through the avoidance groove.

[0008] Furthermore, a flange is connected to the lower front end of the protective cover, and flange sleeve A and flange sleeve B are respectively provided on the side where the protective yarn tube is connected to the air ring rupture cover, and flange sleeve A and flange sleeve B are fixedly connected to the flange by fastening screws.

[0009] Furthermore, a U-shaped protective fence is horizontally arranged below the sensor base from left to right. The open end of the U-shaped protective fence is fixedly connected to the bottom surface of the sensor base. The detection contact pieces corresponding to the short probe, the medium probe, and the long probe are distributed sequentially along the length direction of the U-shaped protective fence within the enclosed area of ​​the U-shaped protective fence. The lower end of each detection contact piece passes downward through the U-shaped protective fence and does not contact the inner side of the U-shaped protective fence.

[0010] Furthermore, the U-shaped protective fence is installed and fixed on the radially upper side of the yarn storage drum via the sensor seat, and is located on the side of each of the detection contacts away from the yarn storage drum, forming an overall physical barrier between the yarn lead-out path and the detection contacts corresponding to the short probe, the medium probe, and the long probe.

[0011] Furthermore, the lateral length of the U-shaped protective fence covers the lateral distribution range of the detection contact pieces corresponding to the short probe, the medium probe, and the long probe, and the width is greater than the width of each detection contact piece.

[0012] Furthermore, the U-shaped protective fence has an overall L-shaped side profile, including a horizontal section and a vertical section. The vertical section is the open end of the U-shaped protective fence, extends vertically upward and is fixed to the bottom surface of the sensor base. The horizontal section is the enclosing end of the U-shaped protective fence, is perpendicular to the vertical section and extends along one horizontal side, forming a shield around each of the detection contact pieces.

[0013] Furthermore, the transverse section and the longitudinal section of the U-shaped protective fence form an arc-shaped transition section.

[0014] Furthermore, the U-shaped protective fence is connected to the sensor base in a detachable manner; or it is integrally molded with the sensor base by injection molding.

[0015] Furthermore, both the protective yarn tube and the air ring rupture cover are made of metal.

[0016] Compared with the prior art, this utility model has the following technical effects: the air ring rupture cover set at the front end of the yarn storage drum has a unique conical cylindrical structure, which can effectively rupture and control the air ring formed during the yarn unwinding process. That is, when the yarn is unwinding from the yarn storage drum at high speed, the air ring will continuously expand outward under the action of centrifugal force, and the air ring rupture cover can contact the air ring formed inside it. By changing the shape and movement trajectory of the air ring through the conical cylindrical inner wall of the air ring rupture cover, the energy of the air ring is concentrated inward, thereby avoiding the air ring generated during the weft unwinding from affecting the normal output of the weft yarn; one end of the conical tip of the air ring rupture cover is connected to the yarn outlet, and the yarn is led out from the yarn outlet, which can enter the subsequent weaving process more smoothly, reducing the friction and damage of the yarn; The yarn protector is sleeved on the outer front end of the yarn storage drum and is integrated with the air ring rupture cover. The yarn protector prevents the yarn from colliding and scratching with external objects when sliding on the surface of the yarn storage drum, reducing yarn wear and breakage risks. Simultaneously, the cooperation between the yarn protector and the air ring rupture cover better guides yarn movement, maintaining a stable state during weft insertion and storage, thus improving the stability and reliability of weft movement. Furthermore, both the yarn protector and the air ring rupture cover are made of metal, which has high strength and wear resistance, maintaining good performance over long-term use, and is not easily damaged, extending the service life of the weft feeder. The U-shaped protective fence effectively prevents the yarn from accidentally contacting the detection contact during movement, without affecting the detection contact's ability to sense changes in the amount of yarn on the surface of the yarn storage drum. It also effectively blocks the contact between the yarn and the detection contact when it scatters, thus avoiding detection failure caused by the yarn getting tangled. Attached Figure Description

[0017] Figure 1 A schematic diagram of the overall cross-sectional structure of the weft feeder; Figure 2 A schematic diagram of the overall three-dimensional structure of the weft feeder; Figure 3 for Figure 1 Schematic diagram of the connection structure between the middle protective yarn bobbin and the air ring rupture cover; Figure 4 for Figure 1 A schematic diagram of the protective structure for the detection contact of the central storage device; Figure 5 for Figure 1 Schematic diagram of the structure of the U-shaped protective fence and the detection contact plate; Figure 6 for Figure 1 A schematic diagram of a structure in which short and medium probes, medium probes and long probes are arranged side by side; Figure 7 for Figure 1 A schematic diagram showing the configuration of short and medium probes, medium probes, and long probes arranged side by side. Figure 8 for Figure 1 A schematic diagram of the structure of the sensing component of the storage device; Sensor base 1, inner mounting groove 11, left probe hole 110, middle probe hole 111, right probe hole 112, short probe rod 2, middle probe rod 3, long probe rod 4, detection contact piece 5, U-shaped protective fence 7, transverse section 71, longitudinal section 72, arc transition section 73, pivot pin 10, motor protective shell 20, motor 30, yarn winding disc 40, yarn storage drum 50, protective cover 60, mounting groove 600, air ring rupture cover 70, flange sleeve B 701, yarn outlet 80, yarn protection cylinder 90, clearance groove 900, flange sleeve A 901. Detailed Implementation

[0018] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0019] Example: Please refer to Figure 1-8 As shown, a weft storage device includes a motor protective housing 20, a motor 30, a yarn winding disc 40, a yarn storage drum 50, and a protective cover 60. The motor 30 is disposed inside the motor protective housing 20. The yarn winding disc 40 is provided on the right side of the motor protective housing 20, and the yarn storage drum 50 is connected to the yarn winding disc 40. The yarn winding disc 40 is used to wind yarn onto the yarn storage drum 50 to realize the weft yarn storage function.

[0020] The protective cover 60 is connected to the upper side of the motor protective shell 20 and above the yarn storage drum 50. A conical air ring rupture cover 70 is provided at the front end of the yarn storage drum 50. The outer wall of the air ring rupture cover 70 is fixedly connected to the protective cover 60. One end of the conical tip is connected to a yarn outlet 80, from which the yarn is drawn out, allowing it to enter the subsequent weaving process more smoothly and reducing yarn friction and damage. A yarn protection cylinder 90 is fitted onto the outer side of the front end of the yarn storage drum 50, and this yarn protection cylinder 90 is connected to the air ring rupture cover. 70 are connected in series as one unit; a weft feeder sensing component is provided inside the protective cover 60. The protective cover 60 has a mounting groove 600 on the side facing the yarn storage drum 50. The yarn protection cylinder 90 has an avoidance slot 900 corresponding to the mounting groove 600. The weft feeder sensing component is installed in the mounting groove 600, and its sensing end protrudes downward and is distributed on the radial upper side of the yarn storage drum 50 after passing through the avoidance slot 900. This arrangement can ensure that the sensing component can accurately sense the change in the amount of yarn on the surface of the yarn storage drum 50. The purpose of the design of the air ring rupture cover 70 is to effectively rupture and control the air ring formed when the yarn is unwound at high speed from the yarn storage drum 50. That is, when the yarn is unwound at high speed, the air ring will continuously expand outward under the action of centrifugal force. The conical inner wall of the air ring rupture cover 70 can change the shape and movement trajectory of the air ring, so that the energy of the air ring is concentrated inward, thereby solving the problem that the air ring affects the normal output of the weft yarn when the weft yarn is unwound, and achieving stable output of the weft yarn.

[0021] Both the yarn protector 90 and the air ring rupture cover 70 are made of metal. The yarn protector 90 prevents the yarn from colliding and scratching with external objects when sliding on the surface of the yarn storage drum 50, reducing the risk of yarn wear and breakage. Simultaneously, the cooperation between the yarn protector 90 and the air ring rupture cover 70 better guides the movement of the yarn, maintaining a stable state during weft insertion and storage, solving the problem of unstable yarn movement, and improving the stability and reliability of weft movement. Furthermore, the fact that both the yarn protector 90 and the air ring rupture cover 70 are made of metal, which has high strength and wear resistance, ensures good performance during long-term use, is not easily damaged, and extends the service life of the weft feeder.

[0022] The weft insertion sensor assembly includes a sensor base 1, a short probe 2, a middle probe 3, a long probe 4, and a detection contact 5. The sensor base 1 has a transversely formed inner mounting groove 11. The inner mounting groove 11 has a left detection hole 110, a middle detection hole 111, and a right detection hole 112 formed on the bottom left, middle, and right sides, respectively. The short probe 2, middle probe 3, and long probe 4 are arranged side-by-side and coaxially connected to the left end of the sensor base 1 via a pivot pin 10. The right ends of probe 3 and the long probe 4 are located within the inner mounting groove 11. The right ends of the short probe 2, the middle probe 3, and the long probe 4 are respectively connected to probe contacts 5, which serve as the sensing ends of the weft feeder sensing components. Each probe contact 5 extends downwards through the left probe hole 110, the middle probe hole 111, and the right probe hole 112, and is distributed radially upwards on the yarn storage drum 50. At least one set of probe contacts 5 from right to left passes through the clearance slot 900. The lower end of the probe contact 5 contacts the yarn on the surface of the yarn storage drum 50 to sense changes in the yarn storage amount. This signal is then transmitted to a photoelectric sensor (not shown in the diagram) via the swing of the probe, thereby controlling the start and stop of the motor.

[0023] A flange 100 is connected to the lower front end of the protective cover 60. Flange sleeves A901 and B701 are respectively provided on the side where the yarn sleeve 90 is connected to the air ring rupture cover 70. Flange sleeves A901 and B701 are fixedly connected to the flange by fastening screws, thereby making the yarn sleeve 90, air ring rupture cover 70 and protective cover 60 firmly connected, ensuring the stability of the entire structure.

[0024] A U-shaped protective fence 7 is horizontally arranged from left to right below the sensor base 1. The open end of the U-shaped protective fence 7 is fixedly connected to the bottom surface of the sensor base 1. The detection contact pieces 5 corresponding to the short probe 2, the medium probe 3, and the long probe 4 are distributed sequentially along the length direction of the U-shaped protective fence 7 within the enclosed area of ​​the U-shaped protective fence 7. The lower end of each detection contact piece 5 passes downward through the U-shaped protective fence 7 and does not contact the inner side of the U-shaped protective fence 7. Thus, without affecting the detection contact piece 5's ability to sense changes in the amount of yarn on the surface of the yarn storage drum 50, it effectively prevents the detection failure caused by the flying yarn entanglement with the detection contact piece 5 when the yarn flies away.

[0025] The U-shaped protective fence 7 is installed and fixed radially upward on the yarn storage drum 50 via the sensor seat 1, and is located on the side of each of the detection contacts 5 away from the yarn storage drum 50, forming an overall physical barrier between the yarn lead-out path and the detection contacts 5 corresponding to the short probe 2, medium probe 3, and long probe 4. The lateral length of the U-shaped protective fence 7 covers the lateral distribution range of the detection contacts 5 corresponding to the short probe 2, medium probe 3, and long probe 4, and its width is greater than the width of each detection contact 5. That is, an appropriate movement gap is maintained between the detection contacts 5 and the inner wall of the U-shaped protective fence 7, ensuring that the detection contacts 5 can swing freely with the change in the amount of yarn on the surface of the yarn storage drum 50, without rubbing or getting stuck with the U-shaped protective fence 7, thereby ensuring that the detection accuracy is not affected.

[0026] The U-shaped protective fence 7 has an overall L-shape on its side, including a horizontal section 71 and a vertical section 72. The vertical section 72 is the open end of the U-shaped protective fence 7, extending vertically upward and fixed to the bottom surface of the sensor base 1. The horizontal section 71 is the enclosing end of the U-shaped protective fence 7, perpendicular to the vertical section 72 and extending horizontally to one side, forming a shield around each of the detection contact pieces 5. The horizontal section 71 constitutes the enclosing end of the U-shaped protective fence 7, which is perpendicular to the vertical section 72 and extends horizontally to one side, thereby effectively shielding the surrounding area of ​​each detection contact piece 5. An arc-shaped transition section 73 is formed between the horizontal section 71 and the vertical section 72 of the U-shaped protective fence 7. This arc-shaped transition section 73 can prevent sharp right-angle structures from scratching the yarn, ensuring that the yarn flows smoothly and unobstructed during the lead-out process.

[0027] The U-shaped protective fence 7 and the sensor base 1 can be detachably connected, for example, by screws or clips, facilitating later maintenance, cleaning, or replacement. Alternatively, the U-shaped protective fence 7 and the sensor base 1 can be integrally molded using an injection molding process. This method results in a more stable structure, better overall integrity, and suitability for mass production.

[0028] The U-shaped protective fence 7, especially its transverse section 71, constitutes a solid physical barrier. When the yarn deviates from its normal path and becomes a stray thread due to sudden changes in traction speed or elastic recoil, this barrier effectively prevents the stray thread from directly impacting or tangling with the exposed detection contact 5, fundamentally avoiding the problems of detection contact jamming and signal failure caused by tangling. It avoids the need for machine downtime for maintenance due to tangling, reduces unplanned downtime, and significantly improves the operational stability and production efficiency of the loom. The U-shaped protective fence 7 has a simple structure; its L-shaped design combined with the arc-shaped transition section 73 achieves effective protection while avoiding damage to the yarn. It can be flexibly detached or integrally molded with the sensor base 1 without requiring major modifications to the core components of the weft feeder, making it easy to add to existing products or integrate into new products.

[0029] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A weft feeder, comprising a motor protective housing (20), a motor (30), a yarn winding disc (40), a yarn storage drum (50), and a protective cover (60), wherein the motor (30) is disposed within the motor protective housing (20), the yarn winding disc (40) is disposed on the right side of the motor protective housing (20), and the yarn storage drum (50) is connected to the yarn winding disc (40), and the protective cover (60) is connected from the upper side of the motor protective housing (20) to the top of the yarn storage drum (50), characterized in that: The front end of the yarn storage drum (50) is provided with a conical cylinder-shaped air ring rupture cover (70). The outer wall of the air ring rupture cover (70) is fixedly connected to the protective cover (60), and one end of its cone tip is connected to the yarn outlet (80). A protective yarn tube (90) is sleeved on the outer side of the front end of the yarn storage drum (50). The protective yarn tube (90) is connected in series with the air ring rupture cover (70) as a whole. A weft feeder sensing component is provided inside the protective cover (60). An installation groove (600) is opened on the side of the protective cover (60) facing the yarn storage drum (50). An avoidance groove (900) is opened on the protective yarn tube (90) corresponding to the installation groove (600). The weft feeder sensing component is installed in the installation groove (600). One end of its sensing end protrudes downward and is distributed on the radial upper side of the yarn storage drum (50) after passing through the avoidance groove (900).

2. The weft feeder as described in claim 1, characterized in that, The weft storage sensor assembly includes a sensor base (1), a short probe (2), a middle probe (3), a long probe (4), and a detection contact (5). The sensor base (1) has a transversely opened inner mounting groove (11). The bottom left, middle, and right sides of the inner mounting groove (11) are respectively provided with a left probe hole (110), a middle probe hole (111), and a right probe hole (112). The short probe (2), the middle probe (3), and the long probe (4) are arranged side by side and are coaxial in the middle and hinged to the left end of the sensor base (1) through a pivot pin (10). The right ends of the middle probe (3) and the long probe (4) are located in the inner mounting groove (11), and the right ends of the short probe (2), the middle probe (3) and the long probe (4) are respectively connected to the detection contact (5) as the sensing end of the weft storage sensor component. Each detection contact (5) extends downward through the left probe hole (110), the middle probe hole (111) and the right probe hole (112) and is distributed on the radial upper side of the yarn storage drum (50). At least one set of each detection contact (5) from right to left passes through the avoidance groove (900).

3. The weft feeder as described in claim 1, characterized in that, A flange (100) is connected to the lower front end of the protective cover (60). Flange sleeve A (901) and flange sleeve B (701) are respectively provided on the side where the protective yarn tube (90) is connected to the air ring rupture cover (70). Flange sleeve A (901) and flange sleeve B (701) are fixedly connected to the flange by fastening screws.

4. The weft feeder as described in claim 2, characterized in that, A U-shaped protective fence (7) is horizontally arranged from left to right below the sensor base (1). The open end of the U-shaped protective fence (7) is fixedly connected to the bottom surface of the sensor base (1). The detection contact pieces (5) corresponding to the short probe (2), the medium probe (3) and the long probe (4) are distributed sequentially along the length direction of the U-shaped protective fence (7) within the enclosed area of ​​the U-shaped protective fence (7). The lower end of each detection contact piece (5) passes downward through the U-shaped protective fence (7) and does not contact the inner side of the U-shaped protective fence (7).

5. The weft feeder as described in claim 4, characterized in that, The U-shaped protective fence (7) is installed and fixed on the radial upper side of the yarn storage drum (50) by the sensor seat (1) and is located on the side of each of the probes (5) away from the yarn storage drum (50), forming an overall physical barrier between the yarn lead-out path and the probes (5) corresponding to the short probe (2), the medium probe (3) and the long probe (4).

6. The weft feeder as described in claim 4, characterized in that, The lateral length of the U-shaped protective fence (7) covers the lateral distribution range of the detection contact pieces (5) corresponding to the short probe (2), the medium probe (3) and the long probe (4), and the width is greater than the width of each detection contact piece (5).

7. The weft feeder as described in claim 4, characterized in that, The U-shaped protective fence (7) has an overall L-shaped side, including a horizontal section (71) and a vertical section (72). The vertical section (72) is the open end of the U-shaped protective fence (7), which extends vertically upward and is fixed to the bottom surface of the sensor seat (1). The horizontal section (71) is the enclosing end of the U-shaped protective fence (7), which is perpendicular to the vertical section (72) and extends along one side of the horizontal direction, forming a shield around each of the detection contact pieces (5).

8. The weft feeder as described in claim 7, characterized in that, The transverse section (71) and the longitudinal section (72) of the U-shaped protective fence (7) form an arc-shaped transition section (73).

9. The weft feeder as described in claim 4, characterized in that, The U-shaped protective fence (7) is connected to the sensor base (1) in a detachable manner; or it is integrally molded with the sensor base (1) by injection molding.

10. The weft feeder as claimed in claim 1, characterized in that, Both the protective yarn tube (90) and the air ring rupture cover (70) are made of metal.

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