A yarn winding and feeding machine

Abstract

The application relates to the field of cone yarn feeding technology, and particularly discloses a cone yarn feeding vehicle, which comprises a vehicle body, a translation mechanism arranged on the bottom surface of the vehicle body, a yarn tube moving mechanism, at least one yarn tube head finding mechanism and a feeding mechanism arranged on the top surface of the vehicle body, and a hopper hinged to one end of the vehicle body; a yarn tube feeding mechanism is arranged in the vehicle body; a yarn tube lifting mechanism is connected to the end of the yarn tube feeding mechanism; the yarn tube lifting mechanism comprises a shell; a distinguishing mechanism is arranged on the rear side of the upper end of the shell, the distinguishing mechanism is used for distinguishing the big and small heads of the yarn tube and controlling the big head end of the yarn tube to fall downwards; a guide mechanism is arranged below the distinguishing mechanism, and the guide mechanism is used for placing the yarn tube falling from the distinguishing mechanism on the yarn tube moving mechanism. Compared with the prior art, the application can avoid the problem that the flexible belt is not easy to lift the yarn tube and affects the subsequent process.

Description

Technical Field

[0001] This invention relates to the field of winding and yarn feeding technology, and specifically discloses a winding and yarn feeding machine. Background Technology

[0002] Winding machines are specialized equipment in the textile industry. As the final step in spinning and the first step in weaving, winding plays a crucial "bridge" role, thus holding an important position in the textile field.

[0003] To improve automation and production efficiency, automatic yarn feeding trolleys have been developed for winding machines. The two ends of the yarn tube have different diameters, with the larger end being the "large end" and the smaller end the "small end." In existing automatic yarn feeding trolleys, the large end of the bobbin is typically inserted into the base of the yarn tube moving mechanism, making the yarn tube vertical. The yarn tube moving mechanism then moves the yarn tube from the base to the yarn tube finding mechanism, which inserts the yarn end into the small end of the upper yarn tube. Finally, a feeding mechanism picks up the yarn tube from the moving mechanism and feeds it into the yarn magazine.

[0004] In the prior art, such as the patent published under publication number CN111392513A, an automatic yarn insertion robot device is disclosed, including a frame assembly, on which a hydraulic lifting trolley, a feeding port assembly, a feeding tipping bucket assembly, a vertical climbing conveyor, and a transverse rotating wheel funnel component are used to transport yarn tubes; a large-end yarn suction assembly is provided below the transverse rotating wheel funnel component; a yarn tube conveying platform assembly is provided at the head of the frame assembly, and the large-end yarn suction assembly transports the yarn tubes to the yarn tube conveying platform assembly; a negative pressure yarn suction and head finding assembly is provided above the yarn tube conveying platform assembly, and a negative pressure system assembly is provided below the yarn tube conveying platform assembly; a shuttle-throwing manipulator component is provided on the frame assembly.

[0005] The above solution has the following problems: 1. The yarn tubes are lifted by welding the hanging plates on the flexible vertical conveyor belt. When the yarn tubes are gathered, they interfere with each other, and the flexible belt makes it difficult to lift the yarn tubes, which affects the subsequent process.

[0006] 2. A transverse conveyor belt is set up after the lifting mechanism as a transfer mechanism to transport the yarn tubes to the separating mechanism to separate the large and small ends of the yarn tubes. This adds an intermediate link, increases the difficulty of setting up the control system, and affects work efficiency. Summary of the Invention

[0007] To address the aforementioned shortcomings of existing technologies, this invention provides a winding and feeding cart to solve the problem that when yarn tubes are lifted by a welding assembly of yarn tube hanging plates on a flexible vertical conveyor belt, the yarn tubes interfere with each other, making it difficult for the flexible belt to lift the yarn tubes and affecting subsequent processes.

[0008] To achieve the above objectives, the technical solution of the present invention is as follows: A winding and feeding cart includes a cart body, a translation mechanism on the bottom surface of the cart body, a yarn tube moving mechanism, at least one yarn tube finding mechanism and a feeding mechanism on the top surface of the cart body, and a tipping bucket hinged to one end of the cart body; a yarn tube feeding mechanism is provided inside the cart body; and a yarn tube lifting mechanism is connected to the end of the yarn tube feeding mechanism. The yarn tube lifting mechanism includes a housing; several fixed platforms are fixedly installed inside the housing; the fixed platforms are spaced apart and parallel to each other; the fixed platforms increase in height from left to right; a movable platform is slidably installed inside the housing; the movable platform is connected to a drive assembly, which drives the movable platform to intermittently rise and fall; several lifting frames are fixedly installed on the movable platform; the lifting frames are spaced apart and parallel to each other; the lifting frames increase in height from left to right; the lifting frames and the fixed platforms are staggered. A separating mechanism is provided on the rear side of the upper end of the housing. The separating mechanism is used to separate the large and small ends of the yarn tube and control the large end of the yarn tube to fall downwards. A guiding mechanism is provided below the separating mechanism. The guiding mechanism is used to place the yarn tube that has fallen from the separating mechanism onto the yarn tube moving mechanism.

[0009] When the yarn tube is fed, it enters the first lifting frame of the moving table and leans against the side wall of the first fixed table. Driven by the drive component, the moving table rises, and the yarn tube is then lifted to the top surface of the first fixed table and leans against the side wall of the second lifting frame of the moving table. This process is repeated until the yarn tube is lifted to the top of the housing and enters the subsequent process. This avoids the problem that the flexible belt is not easy to lift the yarn tube and affect the subsequent process.

[0010] Preferably, the drive assembly includes a motor reducer; the motor reducer is fixedly mounted on the inner wall of the right side of the housing; the output shaft of the motor reducer is connected to the moving platform via a connecting rod assembly.

[0011] Preferably, the linkage assembly includes a first linkage; one end of the first linkage is fixedly connected to the output shaft of the motor reducer, and the other end is hinged to a second linkage; the second linkage is hinged to the movable platform. The motor reducer drives the first linkage to rotate, which in turn drives the movable platform to intermittently rise and fall via the second linkage.

[0012] Preferably, the separating mechanism includes a guide plate; the plane of the guide plate is set at an angle to the top surface of the vehicle body; one end of the guide plate is fixedly connected to one side of the top of the housing; the other end of the guide plate is fixedly connected to a dropping bin; a sensor is installed on the upper end of the inner wall of the dropping bin, and two cylinders are spaced apart on the rear wall of the dropping bin. The guide plate, set at an angle to the top surface of the vehicle body, facilitates the falling of individual yarn tubes after being lifted by the yarn tube lifting mechanism, ensuring smooth yarn tube feeding. Through the reasonable arrangement of the yarn tube lifting mechanism and the separating mechanism, the setting of the transfer mechanism is reduced, the setting difficulty of the control system is reduced, and the work efficiency is improved.

[0013] Preferably, a baffle assembly is provided on the guide plate; the baffle assembly can prevent the yarn tube from falling. The baffle assembly can slow down the fall of the yarn tube, avoid damage to the sensor, and ensure that the yarn tube falls onto the piston rod of the two cylinders on the feeding hopper, ensuring that the sensor can distinguish between the large and small ends of the yarn tube, ensuring the smoothness of the large and small end distinction, and ensuring production efficiency.

[0014] Preferably, the material blocking assembly includes a second cylinder; the cylinder body of the second cylinder is mounted on the base plate, and the piston rod is connected to a material blocking rod; the material blocking rod passes through the guide plate; the base plate is fixedly mounted on the side wall of the housing; and the lower end of the material discharge bin is mounted on the base plate.

[0015] Preferably, the baffle rod includes a flat plate; a cylinder piston rod is connected to the middle of the bottom surface of the flat plate; round rods are fixedly installed at both ends of the top surface of the flat plate; the round rods pass through the guide plate. The two round rods ensure that the yarn tube is blocked on the guide plate.

[0016] Preferably, cylinder three is provided on both the left and right sides of the feeding bin; the cylinder body of cylinder three is set on the feeding bin, and the piston rod passes through the feeding bin and is connected to a pusher plate. When cylinder three is activated, it pushes the yarn tube on the piston rod of cylinder one through the pusher plate, ensuring the stability of the yarn tube on the piston rods of the two cylinders one, and facilitating the falling of the yarn tube.

[0017] Preferably, the yarn tube feeding mechanism includes a slide rail disposed within the vehicle body; the slide rail is angled to the top surface of the vehicle body; a discharge port is provided on the top surface of the vehicle body; the discharge port is located above the slide rail; a cylinder four is disposed within the vehicle body; the piston rod of cylinder four is hinged to a tipping bucket; a conveyor belt is disposed on the slide rail; the conveyor belt is located on the left side of the slide rail. The yarn tubes tipped in by the tipping bucket enter the slide rail. The different sliding speeds of the yarn tubes on the slide rail and the conveyor belt reduce the probability of blockage when a large number of yarn tubes slide down, reduce the number of drive mechanisms required, lower the difficulty of setting up the control system, and simplify the setup.

[0018] Preferably, a discharge box is connected to the lower end of the slide; the discharge box has an isosceles trapezoidal cross-section and openings on the front and rear sides; a dial wheel is rotatably mounted on the bottom surface of the discharge box; and a yarn tube lifting mechanism is connected to the front end of the discharge box. The dial wheel can separate the yarn tubes sliding into the discharge box along the slide, reducing aggregation and clogging. This further reduces the probability of clogging when a large number of yarn tubes slide down, reduces the need for a drive mechanism, and lowers the complexity of the control system setup.

[0019] The beneficial effects of this invention are as follows: 1. When the yarn tube is fed, it enters the first lifting frame of the moving table and leans against the side wall of the first fixed table. Driven by the drive component, the moving table rises, and the yarn tube is then lifted to the top surface of the first fixed table and leans against the side wall of the second lifting frame of the moving table. This process is repeated until the yarn tube is lifted to the top of the housing and enters the subsequent process. This avoids the problem that the flexible belt is not easy to lift the yarn tube and affect the subsequent process.

[0020] 2. The guide plate, angled to the top surface of the vehicle body, facilitates the falling of individual yarn tubes after being lifted by the yarn tube lifting mechanism, ensuring smooth yarn tube feeding. The rational design of the yarn tube lifting and separating mechanisms reduces the need for transfer mechanisms, simplifies the control system setup, and improves work efficiency.

[0021] 3. By rationally designing the yarn tube feeding mechanism, the probability of blockage when a large number of yarn tubes slide down is reduced, the number of drive mechanisms is reduced, and the difficulty of setting up the control system is lowered. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the axial structure of the present invention; Figure 2 This is a partial cross-sectional structural diagram of the present invention; Figure 3 This is a schematic diagram of the structure of the yarn tube feeding mechanism and the yarn tube lifting mechanism for the vehicle body section of the present invention. Figure 4 This is a schematic diagram of the structure of the dial of the present invention; Figure 5 This is a cross-sectional structural schematic diagram of the yarn tube lifting mechanism of the present invention; Figure 6 This is a cross-sectional view of the housing and fixing platform of the yarn tube lifting mechanism of the present invention. Figure 7 This is a schematic diagram of the moving platform, lifting frame, and drive assembly of the yarn tube lifting mechanism of the present invention; Figure 8 This is a schematic diagram of the drive assembly of the yarn tube lifting mechanism of the present invention; Figure 9 This is a schematic diagram of the distinguishing mechanism of the present invention; Figure 10 for Figure 1 Enlarged structural diagram at point A in the middle.

[0024] Explanation of reference numerals in the attached figures: 1-Car body, 2-Tipping bucket, 3-Shell, 4-Motor reducer, 5-Link 1, 6-Link 2, 7-Guide plate, 8-Discharge bin, 9-Sensor, 10-Cylinder 1, 11-Base plate, 12-Blocking rod, 13-Cylinder 3, 14-Push plate, 15-Slide rail, 16-Cylinder 4, 17-Conveyor belt, 18-Discharge box, 19-Dial wheel, 20-Cylinder 2, 21-Finger cylinder, 22-Arc plate; 101-Discharge port; 301-Fixed platform; 302-Moving platform; 303-Lifting frame; 1201-Plate; 1202-Round rod; 1901-Main shaft; 1902-Pulley; 1903-Boss. Detailed Implementation

[0025] To enable those skilled in the art to better understand the technical solutions of this invention, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this invention.

[0026] like Figure 1-4 As shown, a winding and feeding cart includes a cart body 1. A translation mechanism is provided on the bottom surface of the cart body 1, and a yarn tube moving mechanism, two yarn tube finding mechanisms, and a feeding mechanism are provided on the top surface of the cart body 1. A tipping bucket 2 is hinged to one end of the cart body 1. A yarn tube feeding mechanism is provided inside the cart body 1. A yarn tube lifting mechanism is connected to the end of the yarn tube feeding mechanism. The yarn tube lifting mechanism includes a housing 3. A separating mechanism is provided on the rear side of the upper end of the housing 3. The separating mechanism is used to separate the large and small ends of the yarn tube and control the large end of the yarn tube to fall downwards. A guiding mechanism is provided below the separating mechanism. The guiding mechanism is used to place the yarn tubes falling from the separating mechanism onto the yarn tube moving mechanism.

[0027] The yarn tube feeding mechanism includes a slide 15 installed inside the vehicle body 1; the slide 15 is angled to the top surface of the vehicle body 1; a discharge port 101 is provided on the top surface of the vehicle body 1, and a barrier is provided at the discharge port 101 to prevent yarn tube leakage; the discharge port 101 is located above the slide 15; a cylinder 16 is installed inside the vehicle body 1; the piston rod of the cylinder 16 is hinged to the tipping bucket 2; a conveyor belt 17 is installed on the slide 15; the conveyor belt 17 is located on the left side of the slide 15. The yarn tubes poured in by the tipping bucket 2 enter the slide 15. The yarn tubes slide down the slide 15 and the conveyor belt 17 at different speeds, which reduces the probability of blockage when a large number of yarn tubes slide down, reduces the number of drive mechanisms, lowers the difficulty of setting up the control system, and simplifies the setup. A discharge box 18 is connected to the lower end of the slide 15. The discharge box 18 has an isosceles trapezoidal cross-section and is open on both the front and rear sides. A dial wheel 19 is rotatably mounted on the bottom surface of the discharge box 18. The dial wheel 19 includes a main shaft 1901. Several paddles 1902 are mounted on the main shaft 1901. The paddles 1902 are spaced apart and parallel to each other. The main shaft 1901 facilitates the rotation of the dial wheel 19. The paddles 1902 can separate the gathered yarn tubes. Five protrusions 1903 are evenly arranged along the circumferential direction on the outer peripheral wall of the paddles 1902 to facilitate the movement of the yarn tubes. A yarn tube lifting mechanism is connected to the front end of the discharge box 18. The dial wheel can separate the yarn tubes sliding into the discharge box along the slide, reducing aggregation and clogging. This further reduces the probability of clogging when a large number of yarn tubes slide down, reduces the need for a drive mechanism, and lowers the difficulty of setting up the control system.

[0028] like Figure 5-8As shown, three fixed platforms 301 are fixedly installed inside the housing 3 of the yarn tube lifting mechanism; the three fixed platforms 301 are spaced apart and parallel to each other; the three fixed platforms 301 increase in height from left to right; a movable platform 302 is slidably installed inside the housing 3; the movable platform 302 is connected to a drive assembly, which is used to drive the movable platform 302 to intermittently rise and fall; four lifting frames 303 are fixedly installed on the movable platform 302; the four lifting frames 303 are spaced apart and parallel to each other; the four lifting frames 303 increase in height from left to right. The lifting frame 303 and the fixed platform 301 are staggered. When the yarn tube is fed, it enters the first lifting frame 303 of the moving platform 302 and leans against the side wall of the first fixed platform 301. Driven by the drive assembly, the moving platform 302 rises, and the yarn tube is then lifted to the top surface of the first fixed platform 301 and leans against the side wall of the second lifting frame 303 of the moving platform 302. This process continues until the yarn tube is lifted to the top of the housing 3 and enters the subsequent process. This avoids the problem that the flexible belt is not easy to lift the yarn tube and affect the subsequent process. The drive assembly includes a motor reducer 4. The motor reducer 4 is fixedly installed on the inner wall of the right side of the housing 3. The output shaft of the motor reducer 4 is connected to the moving platform 302 through a connecting rod assembly. The connecting rod assembly includes a connecting rod 5. One end of the connecting rod 5 is fixedly connected to the output shaft of the motor reducer 4, and the other end is hinged to a connecting rod 6. The connecting rod 6 is hinged to the moving platform 302. The motor reducer 4 drives the connecting rod 5 to rotate, which in turn drives the moving platform 302 to rise and fall intermittently through the connecting rod 6.

[0029] like Figure 9-10 As shown, the separating mechanism includes a guide plate 7; the plane of the guide plate 7 is set at an angle to the top surface of the vehicle body 1; one end of the guide plate 7 is fixedly connected to one side of the top of the housing 3; the other end of the guide plate 7 is fixedly connected to a dropping bin 8; a sensor 9 is set on the upper end of the inner wall of the dropping bin 8, and two cylinders 10 are spaced apart on the rear wall of the dropping bin 8. The guide plate 7, set at an angle to the top surface of the vehicle body 1, facilitates the falling of individual yarn tubes after being lifted by the yarn tube lifting mechanism, ensuring smooth yarn tube feeding. Through the reasonable setting of the yarn tube lifting mechanism and the separating mechanism, the setting of the transfer mechanism is reduced, the setting difficulty of the control system is reduced, and the working efficiency is improved. A baffle assembly is set on the guide plate 7; the baffle assembly can block the yarn tube from falling. The setting of the baffle assembly can slow down the falling of the yarn tube, avoid damage to the sensor 9, and ensure that the yarn tube can fall onto the piston rods of the two cylinders 10 on the dropping bin 8, ensuring that the sensor 9 can distinguish the large and small ends of the yarn tube, ensuring the smoothness of the large and small end separation, and ensuring production efficiency. Using sensor 9 to distinguish the large and small ends of the yarn tube, and controlling the cylinder 10 through the controller to make the large end of the yarn tube fall first is existing technology, which will not be described in detail here.

[0030] The material-blocking assembly includes a second cylinder 20; the cylinder body of the second cylinder 20 is mounted on the base plate 11, and the piston rod is connected to a material-blocking rod 12; the material-blocking rod 12 passes through the guide plate 7; the base plate 11 is fixedly mounted on the side wall of the housing 3; the lower end of the discharge bin 8 is mounted on the base plate 11. The material-blocking rod 12 includes a flat plate 1201; the piston rod of the second cylinder 20 is connected to the middle of the bottom surface of the flat plate 1201; round rods 1202 are fixedly mounted at both ends of the top surface of the flat plate 1201; the round rods 1202 pass through the guide plate 7. The two round rods 1202 ensure that the yarn tube is blocked on the guide plate 7. A third cylinder 13 is mounted on both the left and right sides of the discharge bin 8; the cylinder body of the third cylinder 13 is mounted on the discharge bin 8, and the piston rod passes through the discharge bin 8 and is connected to a pusher plate 14. When cylinder 313 is activated, it pushes the yarn tube on the piston rod of cylinder 10 through pusher plate 14, ensuring that the yarn tube is stably placed on the piston rods of the two cylinders 10, and facilitating the falling of the yarn tube.

[0031] The guiding mechanism includes a finger cylinder 21, and both output ends of the finger cylinder 21 are connected to arc plates 22. The two arc plates 22 can support the yarn tube and ensure that the yarn tube falls into the base of the yarn tube moving mechanism.

[0032] It should be noted that the translation mechanism on the bottom of the car body 1, the yarn tube moving mechanism on the car body 1, the yarn tube finding mechanism, and the feeding mechanism are all existing technologies and will not be described in detail here.

[0033] Although the present invention has been described in detail with reference to the accompanying drawings and preferred embodiments, the invention is not limited thereto. Various equivalent modifications or substitutions can be made to the embodiments of the invention by those skilled in the art without departing from the spirit and essence of the invention, and such modifications or substitutions should all be within the scope of the invention. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the invention should also be covered within the protection scope of the invention. Therefore, the protection scope of the invention should be determined by the scope of the claims.

Claims

1. A winding and feeding cart, comprising a cart body (1), a translation mechanism provided on the bottom surface of the cart body (1), and a yarn tube moving mechanism, at least one yarn tube finding mechanism, and a feeding mechanism provided on the top surface of the cart body (1), characterized in that, A tipping bucket (2) is hinged to one end of the vehicle body (1); a yarn tube feeding mechanism is installed inside the vehicle body (1); a yarn tube lifting mechanism is connected to the end of the yarn tube feeding mechanism; The yarn tube lifting mechanism includes a housing (3); a number of fixed platforms (301) are fixedly arranged inside the housing (3); the fixed platforms (301) are spaced apart and parallel to each other; the fixed platforms (301) increase in height from left to right; a movable platform (302) is slidably arranged inside the housing (3); the movable platform (302) is connected to a drive assembly, which is used to drive the movable platform (302) to intermittently rise and fall; a number of lifting frames (303) are fixedly arranged on the movable platform (302); the lifting frames (303) are spaced apart and parallel to each other; the lifting frames (303) increase in height from left to right; the lifting frames (303) and the fixed platforms (301) are staggered. A separating mechanism is provided on the rear side of the upper end of the housing (3). The separating mechanism is used to separate the large and small ends of the yarn tube and control the large end of the yarn tube to fall downwards. A guiding mechanism is provided below the separating mechanism. The guiding mechanism is used to place the yarn tube that falls from the separating mechanism onto the yarn tube moving mechanism. The distinguishing mechanism includes a guide plate (7); the plane of the guide plate (7) is set at an angle to the top surface of the vehicle body (1); one end of the guide plate (7) is fixedly connected to one side of the top of the shell (3); the other end of the guide plate (7) is fixedly connected to a dropping bin (8); a sensor (9) is set on the upper end of the inner wall of the dropping bin (8), and two cylinders (10) are set at intervals on the rear wall of the dropping bin (8); a baffle assembly is set on the guide plate (7); the baffle assembly can block the yarn tube from falling.

2. The winding and feeding machine according to claim 1, characterized in that, The drive assembly includes a motor reducer (4); the motor reducer (4) is fixedly mounted on the inner wall of the right side of the housing (3); the output shaft of the motor reducer (4) is connected to the moving stage (302) via a connecting rod assembly.

3. The winding and feeding machine according to claim 2, characterized in that, The linkage assembly includes a first linkage (5); one end of the first linkage (5) is fixedly connected to the output shaft of the motor reducer (4), and the other end is hinged to a second linkage (6); the second linkage (6) is hinged to a moving platform (302).

4. The winding and feeding machine according to claim 1, characterized in that, The material blocking assembly includes cylinder two (20); the cylinder body of cylinder two (20) is set on the bottom plate (11), and the piston rod is connected to the material blocking rod (12); the material blocking rod (12) is set through the guide plate (7); the bottom plate (11) is fixedly set on the side wall of the shell (3); the lower end of the material drop hopper (8) is set on the bottom plate (11).

5. The winding and feeding machine according to claim 4, characterized in that, The baffle rod (12) includes a flat plate (1201); the piston rod of cylinder two (20) is connected to the middle of the bottom surface of the flat plate (1201); round rods (1202) are fixedly installed at both ends of the top surface of the flat plate (1201); the round rods (1202) are installed through the guide plate (7).

6. The winding and feeding machine according to claim 5, characterized in that, Cylinder 3 (13) is installed on both the left and right sides of the discharge bin (8); the cylinder body of cylinder 3 (13) is installed on the discharge bin (8), and the piston rod passes through the discharge bin (8) and is connected to the push plate (14).

7. The winding and feeding machine according to claim 1, characterized in that, The yarn tube feeding mechanism includes a slide (15) set inside the car body (1); the slide (15) is set at an angle to the top surface of the car body (1); a discharge port (101) is set on the top surface of the car body (1); the discharge port (101) is set above the slide (15); a cylinder four (16) is set inside the car body (1); the piston rod of the cylinder four (16) is hinged to the tipping bucket (2); a conveyor belt (17) is set on the slide (15); the conveyor belt (17) is set on the left side of the slide (15).

8. The winding and feeding machine according to claim 7, characterized in that, The lower end of the slide (15) is connected to the discharge box (18); the discharge box (18) has an isosceles trapezoidal cross section and is open on the front and rear sides; a dial wheel (19) is rotatably mounted on the bottom surface of the discharge box (18); the front end of the discharge box (18) is connected to the yarn tube lifting mechanism.

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