Round-bottom bag sealing machine
By designing a round bottom bag sealing machine, the fast positioning and automatic folding of the upper end of the round bag is achieved by using components such as mobile plates, buffer columns and electric rods, which solves the cumbersome sealing process and rebound problems in the existing technology, and improves the sealing efficiency and quality .
Patent Information
- Application Number
- CN202420883330.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-26
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2034-04-26
AI Technical Summary
The round bottom bag is manually operated during the sealing process, resulting in cumbersome and inefficient sealing process. The rebound of the folded part of the round bag affects the sealing quality, requiring additional fixing treatment.
A round bottom bag sealing machine is designed, including a mobile plate, buffer column, electric slide rail, electric rod, fastening plate, stage and heat sealing ring. Through the cooperation of these components, the fast positioning and automatic positioning of the upper end of the round bag is achieved. Fold to avoid rebound problems and improve sealing quality and efficiency.
The sealing process of the round bottom bag is simplified, the proportion of manual operation is reduced, the sealing efficiency is improved, and the sealing quality is enhanced, avoiding the rebound effect of the upper end of the round bag.
Smart Images

Figure CN222272543U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of round bottom bag sealing, in particular to a round bottom bag sealing machine. Background Art
[0002] The sealing machine is a machine for sealing containers containing products. After the products are loaded into the packaging containers, in order to keep the products sealed and preserved, maintain the product quality and avoid product loss, the containers need to be sealed. This operation is completed by the sealing machine. At present, when sealing the round bottom bag, the produced round bag is first set on the surface of the cylinder. After the setting, the upper part of the round bag is folded inward. After the upper part of the round bag is folded, the round bottom is placed on the upper part of the folded end, and a protective pad is placed on the upper part of the round bottom. Then, the folded end is moved to the bottom of the sealing machine. At this time, the sealing machine starts to seal the folded part and the round bottom. However, there are many manual operations in the sealing process, which makes the work process of the round bottom bag sealing more complicated and also leads to low working efficiency of the sealing machine. At the same time, the folded part of the round bag has a certain rebound effect, which will affect the subsequent sealing quality of the round bottom and the round bag. Therefore, after the upper part of the round bag is folded, workers are required to perform additional fixing treatment on it, thereby further increasing the cumbersomeness of the round bottom bag sealing process. Utility Model Content
[0003] In order to overcome the defects of the prior art, a round bottom bag sealing machine is now provided to solve the problems raised in the above background technology.
[0004] To achieve the above-mentioned purpose, a round bottom bag sealing machine is provided, comprising: a moving plate and a buffer column, the moving plate is slidably connected to the upper surface of the base through an electric slide rail, and the upper surface of the base is fixedly connected to the cylinder through a mounting plate, the upper surface of the moving plate is respectively fixedly connected to the vertical plate and the loading platform, and the upper surface of the vertical plate is fixedly connected to the electric rod, the telescopic rod of the electric rod is fixedly connected to the fastening plate through a main pushing block, the round bottom bag is fixed to the surface of the loading platform through the fastening plate, and the telescopic rod of the cylinder is fixedly connected to the auxiliary pushing plate, the lower end of the auxiliary pushing plate is fixedly connected to the moving ring, and the lower surface of the moving ring is fixedly connected to the heat sealing ring, and at the same time, the inner cavity of the moving ring is slidably connected to the buffer column through a fixed frame, and the lower end of the buffer column is fixedly connected to the binding plate, a lifting groove is provided in the buffer column, the top of the lifting groove is fixedly connected to the main motor, and the lifting groove is movably connected to the lifting screw rod through a bearing, the lifting screw rod is connected to the main motor through a coupling, and the moving block is slidably connected in the lifting groove through the screwed lifting screw rod, the lower surface of the moving block is fixedly connected to the positioning plate through a fixed rope, and at the same time, the positioning plate is slidably connected to the guide plate through the guide groove, and the guide plate is symmetrically connected to the side of the binding plate.
[0005] Preferably, the movable ring has a circular ring structure, the auxiliary push plate fixedly connected to the upper surface of the movable ring has a U-shaped structure, and two groups of guide rods are symmetrically connected to the upper surface of the auxiliary push plate, and the upper ends of the two groups of guide rods are slidably connected to the corresponding guide holes opened in the mounting plate, and the mounting plate has an L-shaped structure.
[0006] Preferably, the fixing frame is in a cross-shaped structure as a whole, the through-hole opened in the middle of the fixing frame is matched with the size of the buffer column, and the buffer column is in a cylindrical structure, and the axial cross-section of the buffer column is in a T-shaped structure. At the same time, the upper end of the buffer column is sleeved with the main spring, and the two ends of the main spring are respectively fixedly connected to the upper end of the buffer column and the upper surface of the fixing frame.
[0007] Preferably, the restraint plate has a circular structure, and eight groups of restraint holes are arranged at equal intervals along the circumferential direction in the restraint plate, and the eight groups of restraint holes are all L-shaped structures, and the sizes of the restraint holes and the fixing ropes are adapted. At the same time, the arc surface of the restraint plate is fixedly connected to the eight groups of guide plates relative to the positions of the restraint holes, and the restraint holes are connected to the through holes in the corresponding guide plates.
[0008] Preferably, the guide plate is of a rectangular structure, the sizes of the guide plate and the guide groove are matched, and the positioning plate is of an L-shaped structure, and the end of the guide plate away from the positioning plate is sleeved with a secondary spring, and the two ends of the secondary spring are respectively fixedly connected to the guide plate and the positioning plate. At the same time, the lifting groove opened in the buffer column is of a cylindrical structure, and the moving block slidably connected in the lifting groove is of a circular structure, and the lower surface of the moving block is fixedly connected to eight groups of fixed ropes.
[0009] Preferably, the movable plate has a square structure, and the upper surface of the movable plate is symmetrically connected to four groups of vertical plates, and the four groups of vertical plates are all L-shaped structures, and two groups of main slide grooves are symmetrically opened on the upper surface of the vertical plates, and the cross-section of the main slide groove is a dovetail structure. At the same time, the main push block has a rectangular structure, and the position of the lower surface of the main push block relative to the main slide groove corresponds to the main slider, and the sizes of the main slider and the main slide groove are matched.
[0010] Preferably, the fastening plate to which the main pushing block is fixedly connected is in a fan-shaped structure, and four groups of fastening plates are combined together to form a circular ring structure, and the stop rod fixedly connected to the upper surface of the main pushing block and the fastening plate is in a cylindrical structure. At the same time, the loading platform as a whole is in a cylindrical structure, the axial cross-section of the loading platform is in a T-shaped structure, and the round bottom bag is composed of a cylindrical round bag part and a circular round bottom part.
[0011] Compared with the prior art, the beneficial effects of the utility model are as follows: through the cooperation of the vertical plate, the electric rod, the main pushing block, the fastening plate and the loading platform, the upper end of the round bottom bag can be quickly positioned and fixed, which is convenient for the subsequent corresponding folding of the upper end of the round bag part in the round bottom bag, thereby enhancing the folding effect of the round bag part; at the same time, through the cooperation of the buffer column, the main motor, the lifting screw rod, the moving block, the fixing rope, the guide plate and the positioning plate, the sealing machine can automatically perform corresponding folding and positioning processing on the upper end of the round bag part, thereby avoiding the rebound problem at the upper end of the round bag part, improving the subsequent sealing effect of the round bag part and the round bottom part; and the sealing machine effectively simplifies the sealing process of the round bottom bag, reduces the proportion of manual operation in the sealing process, thereby improving the sealing efficiency of the round bottom bag. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a front view schematic diagram of an embodiment of the utility model.
[0013] Figure 2 This is a front view of the sealing operation of an embodiment of the utility model.
[0014] Figure 3 It is a schematic top view of a moving ring according to an embodiment of the utility model.
[0015] Figure 4 It is a schematic top view of a movable plate according to an embodiment of the utility model.
[0016] Figure 5 For the utility model embodiment Figure 1 An enlarged schematic diagram of point A.
[0017] In the figure: 1. base; 2. electric slide rail; 3. moving plate; 4. loading platform; 5. vertical plate; 6. fastening plate; 7. main push block; 8. electric rod; 9. main motor; 10. fixed frame; 11. moving ring; 12. auxiliary push plate; 13. cylinder; 14. mounting plate; 15. buffer column; 16. restraining plate; 17. heat sealing ring; 18. guide plate; 19. fixing rope; 20. positioning plate; 21. stop rod; 22. round bottom bag; 23. moving block; 24. lifting screw. DETAILED DESCRIPTION
[0018] Reference Figures 1 to 5As shown, the utility model provides a round bottom bag sealing machine, including: a moving plate 3 and a buffer column 15, the moving plate 3 is slidably connected to the upper surface of the base 1 through an electric slide rail 2, and the upper surface of the base 1 is fixedly connected to the cylinder 13 through a mounting plate 14, the upper surface of the moving plate 3 is respectively fixedly connected to the vertical plate 5 and the loading platform 4, and the upper surface of the vertical plate 5 is fixedly connected to the electric rod 8, the telescopic rod of the electric rod 8 is fixedly connected to the fastening plate 6 through the main pushing block 7, the round bottom bag 22 is fixed to the surface of the loading platform 4 through the fastening plate 6, and the telescopic rod of the cylinder 13 is fixedly connected to the auxiliary pushing plate 12, the lower end of the auxiliary pushing plate 12 is fixedly connected to the moving ring 11, and the lower surface of the moving ring 11 is fixed The heat sealing ring 17 is fixedly connected, and the inner cavity of the moving ring 11 is slidably connected to the buffer column 15 through the fixed frame 10. The lower end of the buffer column 15 is fixedly connected to the bundle position plate 16. A lifting groove is set in the buffer column 15, and the top of the lifting groove is fixedly connected to the main motor 9. The lifting screw 24 is movably connected to the lifting groove through the bearing. The lifting screw 24 is connected to the main motor 9 through a coupling, and the moving block 23 is slidably connected in the lifting groove through the screwed lifting screw 24. The lower surface of the moving block 23 is fixedly connected to the positioning plate 20 through the fixed rope 19. At the same time, the positioning plate 20 is slidably connected to the guide plate 18 through the guide groove, and the guide plate 18 is symmetrically connected to the side of the bundle position plate 16.
[0019] In this embodiment, the round bag portion in the round bottom bag 22 is first sleeved on the side of the loading platform 4, and the switch of the electric rod 8 is started. The telescopic rod of the electric rod 8 pushes the main pushing block 7 and the fastening plate 6 to move synchronously, so that the fastening plate 6 can push the upper end of the round bag portion to abut against the side of the loading platform 4, and then complete the positioning and fixing of the upper end of the round bag portion, and then the round bottom of the round bottom bag 22 is laid flat on the upper surface of the loading platform 4, and the switch of the electric slide rail 2 is started. The electric slide rail 2 pushes the moving plate 3 to move, so that the loading platform 4 can move to the bottom of the moving ring 11, and then the switch of the cylinder 13 is started, so that the telescopic rod of the cylinder 13 pushes The auxiliary push plate 12 moves down a distance, and the auxiliary push plate 12 pushes the buffer column 15, the position plate 16 and the positioning plate 20 to move down synchronously through the moving ring 11 and the fixed frame 10, and the lower surface of the positioning plate 20 at the bending part abuts against the surface of the stop rod 21. At this time, the switch of the main motor 9 is started, and the main motor 9 drives the lifting screw 24 to rotate through the coupling, and the lifting screw 24 drives the eight groups of fixed ropes 19 to move synchronously through the screwed moving block 23, and the eight groups of fixed ropes 19 can drive the corresponding connected positioning plates 20 to move synchronously, so that the eight groups of positioning plates 20 can squeeze the corresponding auxiliary springs into the moving ring 11 at the same time. The eight folding points on the upper end of the round bag can simultaneously drive other positions to fit inwardly with the loading platform 4, so that the upper end of the round bag fits the edge of the round bottom surface. The switch of the cylinder 13 is started again, and the cylinder 13 pushes the moving ring 11 to move down again through the auxiliary push plate 12, and the moving ring 11 pushes the fixedly connected heat-sealing ring 17 to move down and abut against the folded curved part of the upper end of the round bag, thereby realizing the sealing process of the round bag and the round bottom in the round bottom bag 22. The heat-sealing ring 17 opens the switch in advance for corresponding preheating, which is convenient for To improve the efficiency of subsequent sealing, the positioning plate 20 always squeezes the round bag part and the round bottom part to abut the surface of the loading platform 4, so the positioning plate 20, the guide plate 18, the restraining plate 16 and the buffer column 15 do not move synchronously with the moving ring 11, so that the main spring sleeved on the buffer column 15 is in a stretched state, thereby completing the rapid sealing process of the round bottom bag 22, simplifying the sealing workflow of the round bottom bag 22, and improving the sealing efficiency of the round bottom bag 22. At the same time, the electric slide rail 2 is a common brand model on the market, and the moving part of the electric slide rail 2 is fixedly connected to the moving plate 3, so the moving plate 3 can slide stably on the surface of the base 1.
[0020] As a preferred embodiment, the moving ring 11 has a circular ring structure, the auxiliary push plate 12 fixedly connected to the upper surface of the moving ring 11 has a U-shaped structure, and the upper surface of the auxiliary push plate 12 is symmetrically connected to two groups of guide rods, and the upper ends of the two groups of guide rods are slidably connected to the corresponding guide holes opened in the mounting plate 14, and the mounting plate 14 has an L-shaped structure.
[0021] In this embodiment, if Figure 1 and Figure 2The sizes of the guide rod and the guide hole are matched, which can then help enhance the stability of the auxiliary push plate 12 and the moving ring 11 during movement and reduce the probability of the moving ring 11 tilting.
[0022] As a preferred embodiment, the fixing frame 10 is in a cross-shaped structure as a whole, the through hole opened in the middle of the fixing frame 10 is adapted to the size of the buffer column 15, and the buffer column 15 is in a cylindrical structure, and the axial cross-section of the buffer column 15 is in a T-shaped structure. At the same time, the upper end of the buffer column 15 is sleeved with the main spring, and the two ends of the main spring are respectively fixedly connected to the upper end of the buffer column 15 and the upper surface of the fixing frame 10.
[0023] In this embodiment, if Figure 1 and Figure 3 The structural setting of the fixed frame 10 enables the buffer column 15 to move synchronously with the movable ring 11, and the setting of the main spring enables the movable ring 11 to push the heat-sealing ring 17 downward. When the positioning plate 20 abuts against the round-bottom bag 22 to be sealed, relative movement can occur between the buffer column 15 and the fixed frame 10 to stretch the main spring, and can also assist in enhancing the fastening effect of the positioning plate 20 on the round-bottom bag 22.
[0024] As a preferred embodiment, the restraint plate 16 has a circular structure, and eight groups of restraint holes are arranged at equal intervals along the circumferential direction in the restraint plate 16, and the eight groups of restraint holes are all L-shaped structures, and the sizes of the restraint holes and the fixing ropes 19 are adapted to each other. At the same time, the arc surface of the restraint plate 16 is fixedly connected to the eight groups of guide plates 18 relative to the positions of the restraint holes, and the restraint holes are connected to the through holes in the corresponding guide plates 18.
[0025] In this embodiment, if Figure 3 and Figure 5 The sizes of the position hole and the through hole are matched, so that the fixing rope 19 can slide stably in the position hole and the through hole, avoiding the fixing rope 19 from being directly exposed to the outside world, thereby helping to reduce the probability of failure during relative movement between the positioning plate 20 and the guide plate 18.
[0026] As a preferred embodiment, the guide plate 18 has a rectangular structure, the sizes of the guide plate 18 and the guide groove are matched, and the positioning plate 20 has an L-shaped structure, and the end of the guide plate 18 away from the positioning plate 20 is sleeved with a secondary spring, and the two ends of the secondary spring are respectively fixedly connected to the guide plate 18 and the positioning plate 20. At the same time, the lifting groove opened in the buffer column 15 has a cylindrical structure, and the moving block 23 slidably connected in the lifting groove has a circular structure, and the lower surface of the moving block 23 is fixedly connected to eight groups of fixed ropes 19.
[0027] In this embodiment, if Figure 1 , Figure 3 and Figure 5The sizes of the guide plate 18 and the guide groove are adapted to each other, which can reduce the probability of shaking when the positioning plate 20 slides, and the auxiliary spring sleeved on the guide plate 18 can push the positioning plate 20 to automatically reset when the fixed rope 19 does not apply tension to the positioning plate 20, so it is convenient to seal the next group of round-bottom bags 22. At the same time, a protrusion is fixedly connected to the side of the moving block 23, and the protrusion is slidably connected to the groove corresponding to the lifting groove, so that the moving block 23 can be prevented from rotating synchronously with the lifting screw 24, ensuring that the moving block 23 can translate along the axial direction of the lifting groove, thereby ensuring that the fixed rope 19 can smoothly pull the positioning plate 20.
[0028] As a preferred embodiment, the movable plate 3 has a square structure, and the upper surface of the movable plate 3 is symmetrically connected to four groups of vertical plates 5, and the four groups of vertical plates 5 are all L-shaped structures, and two groups of main slide grooves are symmetrically opened on the upper surface of the vertical plate 5, and the cross-section of the main slide groove is a dovetail structure. At the same time, the main push block 7 has a rectangular structure, and the position of the lower surface of the main push block 7 relative to the main slide groove corresponds to the main slider, and the sizes of the main slider and the main slide groove are matched.
[0029] In this embodiment, if Figure 1 and Figure 4 The sizes of the main slider and the main slide groove are adapted to each other, which can then help enhance the stability of the main push block 7 when it moves on the upper surface of the vertical plate 5, thereby ensuring that the fastening plate 6 can position the upper end of the round bag part in the round bottom bag 22 on the side of the loading platform 4, avoiding the problem of associated sliding when the upper end of the round bag part is folded.
[0030] As a preferred embodiment, the fastening plate 6 to which the main pushing block 7 is fixedly connected has a fan-shaped structure, and four groups of fastening plates 6 are combined together to form a circular ring structure, and the stop rod 21 fixedly connected to the main pushing block 7 and the upper surface of the fastening plate 6 has a cylindrical structure. At the same time, the loading platform 4 has a cylindrical structure as a whole, the axial cross-section of the loading platform 4 has a T-shaped structure, and the round bottom bag 22 consists of a cylindrical round bag part and a circular round bottom part.
[0031] In this embodiment, if Figure 1 and Figure 4 The cooperation of the four sets of fastening plates 6 enables the upper end of the round bag portion to fully fit the side of the loading platform 4, which helps to improve the sealing quality of the round bottom bag 22. At the same time, the setting of the stop rod 21 enables the positioning plate 20 and the loading platform 4 to maintain a constant distance, which makes it convenient for the subsequent positioning plate 20 to fold the upper end of the round bag portion accordingly, and the folded part of the upper end of the round bag portion can be smoothly fitted on the surface of the round bottom, which is convenient for enhancing the sealing effect of the heat-sealing ring 17 on the round bottom bag 22.
[0032] The round-bottom bag sealing machine of the utility model can automatically fold and position the upper end of the round-bottom bag 22 through the cooperation of the moving ring 11, the buffer column 15, the main motor 9, the lifting screw rod 24, the moving block 23, the fixing rope 19, the guide plate 18 and the positioning plate 20, so as to facilitate the subsequent sealing process and effectively improve the working efficiency of the sealing machine. At the same time, through the cooperation of the electric rod 8, the main pushing block 7, the fastening plate 6 and the loading platform 4, the round-bottom bag 22 to be sealed can be positioned and fixed accordingly, so as to avoid accidental deviation during the sealing process and ensure the sealing quality of the round-bottom bag 22.
Claims
1. A round bottom bag sealing machine, comprising: A moving plate (3) and a buffer column (15). The moving plate (3) is slidably connected to the upper surface of the base (1) through an electric slide rail (2), and a cylinder (13) is fixedly connected to the upper surface of the base (1) through a mounting plate (14). It is characterized in that: the upper surface of the moving plate (3) is fixedly connected with a vertical plate (5) and a loading platform (4) respectively. The upper surface of the vertical plate (5) is fixedly connected with an electric rod (8). The telescopic rod of the electric rod (8) is fixedly connected with a fastening plate (6) through a main pushing block (7). The round-bottom bag (22) is fixed on the surface of the loading platform (4) through the fastening plate (6). The telescopic rod of the cylinder (13) is fixedly connected with an auxiliary pushing plate (12). The lower end of the auxiliary pushing plate (12) is fixedly connected with a moving ring (11). The lower surface of the moving ring (11) is fixedly connected with a heat-sealing ring (17). At the same time, the inner cavity of the moving ring (11) is slidably connected with the buffer column (15) through a fixing frame (10). The lower end of the buffer column (15) is fixedly connected with a beam-positioning plate (16). A lifting groove is opened in the buffer column (15). The main motor (9) is fixedly connected to the top of the lifting groove. The lifting screw rod (24) is rotatably connected to the lifting groove through a bearing. The lifting screw rod (24) is connected to the main motor (9) through a coupling. The moving block (23) is slidably connected to the lifting groove through the screwed lifting screw rod (24). The lower surface of the moving block (23) is fixedly connected with a positioning plate (20) through a fixing rope (19). At the same time, the positioning plate (20) is slidably connected to the guide plate (18) through a guide groove. The guide plates (18) are symmetrically connected to the sides of the beam-positioning plate (16).
2. A round bottom bag sealing machine according to claim 1, characterized in that: The moving ring (11) is of a circular ring structure. The auxiliary pushing plate (12) fixedly connected to the upper surface of the moving ring (11) is of a U-shaped structure. Two groups of guide rods are symmetrically connected to the upper surface of the auxiliary pushing plate (12). The upper ends of the two groups of guide rods are slidably connected to the corresponding guide holes opened in the mounting plate (14). At the same time, the mounting plate (14) is of an L-shaped structure.
3. A round bottom bag sealing machine according to claim 1, characterized in that: The fixing frame (10) is of an overall cross-shaped structure. The through hole opened in the middle of the fixing frame (10) is adapted to the size of the buffer column (15). The buffer column (15) is of a cylindrical structure. The cross-section of the buffer column (15) is of a T-shaped structure. At the same time, a main spring is sleeved on the upper end of the buffer column (15). The two ends of the main spring are respectively fixedly connected to the upper end of the buffer column (15) and the upper surface of the fixing frame (10).
4. A round bottom bag sealing machine according to claim 1, characterized in that: The beam-positioning plate (16) is of a circular structure. Eight groups of beam-positioning holes are circumferentially and equidistantly opened along the inner edge of the beam-positioning plate (16). All eight groups of beam-positioning holes are of an L-shaped structure. The beam-positioning holes are adapted to the size of the fixing rope (19). At the same time, eight groups of guide plates (18) are fixedly connected to the position of the arc surface of the beam-positioning plate (16) relative to the beam-positioning holes. The beam-positioning holes communicate with the through holes in the corresponding guide plates (18).
5. The round bottom bag sealing machine according to claim 1, characterized in that: The guide plate (18) is of a rectangular structure, the sizes of the guide plate (18) and the guide groove are matched, and the positioning plate (20) is of an L-shaped structure, and one end of the guide plate (18) away from the positioning plate (20) is sleeved with a secondary spring, and the two ends of the secondary spring are respectively fixedly connected to the guide plate (18) and the positioning plate (20), and at the same time, the lifting groove opened in the buffer column (15) is of a cylindrical structure, and the moving block (23) slidably connected in the lifting groove is of a circular structure, and the lower surface of the moving block (23) is fixedly connected to eight sets of fixed ropes (19).
6. A round bottom bag sealing machine according to claim 1, characterized in that: The movable plate (3) has a square structure, and the upper surface of the movable plate (3) is symmetrically connected to four groups of vertical plates (5), and the four groups of vertical plates (5) are all L-shaped structures. The upper surface of the vertical plate (5) is symmetrically provided with two groups of main slide grooves, and the cross-section of the main slide groove is a dovetail structure. At the same time, the main push block (7) has a rectangular structure, and the position of the lower surface of the main push block (7) relative to the main slide groove corresponds to the main slide block, and the sizes of the main slide block and the main slide groove are adapted.
7. The round bottom bag sealing machine according to claim 1, characterized in that: The fastening plate (6) to which the main push block (7) is fixedly connected is in a fan-shaped ring structure, and the four groups of fastening plates (6) are combined together to form a circular ring structure, and the stop rod (21) fixedly connected to the upper surface of the main push block (7) and the fastening plate (6) is in a cylindrical structure, and the loading platform (4) is in a cylindrical structure as a whole, and the axial cross-section of the loading platform (4) is in a T-shaped structure, and the round bottom bag (22) is composed of a cylindrical round bag part and a circular round bottom part.
