Edible fungus bag three-station material rolling bag feeding device
By designing a three-station roll bag bag feeding device for edible fungi bags, the problem of low production efficiency of the double-station bag packing machine in the existing technology is solved, and the automatic feeding, cutting and transfer of bacteria bags is realized, and the production efficiency of edible fungi production equipment is improved.
Patent Information
- Application Number
- CN202420903729.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-28
- Publication Date
- 2025-05-23
- Estimated Expiration
- 2034-04-28
AI Technical Summary
Among the existing edible fungi production equipment, the production efficiency of the double-station bag loader is inefficient and cannot meet the needs of efficient production. The roll bag bag feeding device used is also not suitable for the three-station high-speed bag loader.
A three-station rolling bag bag delivery device for edible fungi and fungi bags is designed, including bag delivery device, bag cutting device and bag suction moving device. Through the gas expansion shaft, bag rolling motor, bag buffer parts, detection switch and other components, the automatic feeding, cutting and transfer of bacteria bags is realized.
It improves the production efficiency of edible fungi production equipment, realizes continuous supply and accurate transmission of bacteria bags, and meets the needs of efficient and continuous production.
Smart Images

Figure CN222892769U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of edible fungus production equipment, in particular to a three-station roll bag feeding device for edible fungus bags. Background Art
[0002] In the production process of edible fungi, the preparation of mushroom bags is a key link. The market is full of double-station bagging machines (that is, one cycle can produce two bags of mushrooms), but their production efficiency is low and is no longer suitable for the current production environment. Therefore, we have developed a new generation of edible fungi three-station high-speed bagging machines (that is, one cycle can produce three bags of mushrooms), which greatly improves production efficiency.
[0003] To cooperate with the three-station high-speed bagging machine production equipment, the three-station roll bag feeding device for edible fungus bags must be used. The bagging machines on the market are all double-station (that is, two bags of fungus bags are produced in one cycle), and the roll bag feeding device used is also double-station, which cannot be suitable for the new high-speed bagging machine. Utility Model Content
[0004] 1. Technical issues to be solved
[0005] In view of the deficiencies in the prior art, the utility model provides a three-station roll bag feeding device for edible fungus bags.
[0006] (II) Technical solution
[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: the utility model provides a three-station roll bag feeding device for edible mushroom bags, comprising a box body, a bag feeding device, a bag cutting device and a bag suction moving device, wherein the bag feeding device, the bag cutting device and the bag suction moving device are arranged in the box body;
[0008] The bag delivery device includes air shafts of groups A, B, and C, a bag rolling motor, a bag buffer, a bag buffer induction switch, a bag delivery active roller, and a bag delivery pressure roller device. The three air shafts are used to place a whole roll of bag. The bag rolling motor drives the air shaft to rotate and place the bag. The bag buffer induction switch cooperates with the bag buffer to control the rotation of the bag rolling motor. The bag delivery active roller and the bag delivery pressure roller device work together to deliver the bag to a designated position.
[0009] The bag cutting device comprises a bag pressing cylinder, a frame 1, a bag cutting soft block, a cutter cylinder, a cutter frame, a cutter guide rail and a cutter. The bag pressing cylinder drives the bag cutting soft block to press the mushroom bag onto the frame 1, and the cutter cylinder drives the cutter frame to reciprocate under the guidance of the cutter guide rail to cut the mushroom bag.
[0010] The bag suction moving device includes a bag opening motor, a bag opening synchronous belt driving device, a bag opening synchronous plate, a bag opening suction box, a suction box fan, an air suction switching valve, a suction box mounting tube, a bag moving driving motor and a bag moving track. The bag opening motor drives the bag opening synchronous plate to move left and right through the bag opening synchronous belt driving device. The bag opening suction box is installed on the suction box mounting tube and driven by the synchronous plate to realize merging and separation. The suction box fan and the air suction switching valve work together to generate negative pressure to suck the bag mouth. The bag moving driving motor drives the suction box to move along the bag moving track.
[0011] Preferably, the bag feeding device and the bag cutting device are installed in the upper part of the box body, the bag suction moving device is located in the lower part of the box body, and the bag cutting device is located between the bag suction moving device and the bag feeding roller device.
[0012] Further preferably, the inflatable shafts are arranged in two groups above the bag feeding and pressing roller device, and another group is arranged on the left side of the bag cutting device and the bag feeding and pressing device.
[0013] Again preferably, the mushroom bag caching member is arranged between the three groups of inflatable shafts and the bag feeding and pressing device, and the mushroom bag caching member can be installed on the box body in a vertically movable manner.
[0014] Preferably, the bag rolling motor is fixedly mounted on the outer wall of the box, the air shaft is rotatably mounted in the box, and the output end of the bag rolling motor is connected to the air shaft.
[0015] Further preferably, the bag feeding device also includes a detection switch, which is used to detect the bag distance and the sealing line of the bags. The bag feeding active roller is driven by a bag feeding motor. The bag feeding pressing roller device includes a pressing roller buckle plate and a pressing roller fixing buckle. The pressing roller buckle plate is hinged on the bag feeding active roller. The pressing roller fixing buckle is elastically mounted on the pressing roller buckle plate through a tension spring. The pressing roller fixing buckle is used to press the mushroom bag onto the bag feeding active roller.
[0016] Again preferably, the cutter cylinder is fixedly mounted on the cutter frame, the cutter frame is slidably mounted on the cutter guide rail through the cutter cylinder, a cutter is fixedly mounted on the bottom of the cutter frame, and the bag pressing cylinder is fixedly mounted on frame one.
[0017] Preferably, the bag suction moving device also includes a frame two and a bag rubbing fixed block, a duct rack is provided at the bottom of the frame two, the suction switching valve is fixedly mounted on the duct rack, the bag opening synchronization plate includes a synchronization plate one and a synchronization plate two, the bag moving track is installed on the frame two in the Y direction and is located above the duct rack, the bag moving drive motor is located below the frame two, a bag rubbing slide rail is installed on the synchronization plate one, a bag moving rack is provided below the frame two, the output end of the bag moving drive motor is adapted to the bag moving rack through a gear, the synchronization plate one is fixedly mounted on the top of the bag moving track, and the synchronization plate two is slidably mounted on another bag moving track The top of the bag opening synchronous belt driving device is fixedly mounted on one end of the frame two and adapted to the synchronous plate two, the bag opening synchronous belt driving device is driven by the bag opening motor, the suction box mounting tube is connected with the suction switching valve through the suction box air duct, the bag opening suction box comprises a left suction box and a right suction box, the left suction box is fixedly mounted on the synchronous plate two through the suction box mounting tube, the right suction box is fixedly mounted on the synchronous plate one through the suction box mounting tube, the bag rubbing fixed block is fixedly mounted on the frame two, the suction box mounting tube of the right suction box is provided with a baffle, the suction box mounting tube of the right suction box passes through the bag rubbing fixed block, and the baffle is adapted to the bag rubbing fixed block.
[0018] Further preferably, a bag rubbing spring is connected between the bag rubbing slide rail and frame 2.
[0019] (III) Beneficial effects
[0020] Compared with the prior art, the utility model provides a three-station roll bag feeding device for edible fungus bags, which has the following beneficial effects:
[0021] Air shaft layout: The air shaft is mainly distributed above and on the side of the bag feeding roller device to ensure the stability of the bag transmission and the rationality of the layout;
[0022] Mushroom bag buffer: It is arranged around the three groups of air expansion shafts and the bag feeding and pressing device to achieve continuous supply of mushroom bags;
[0023] Bag rolling motor and air shaft: The bag rolling motor is fixedly installed on the outer wall of the box, and the air shaft is rotatably installed in the box. The two are connected to facilitate the rolling and feeding of the fungus bags;
[0024] Optimization of bag delivery device: the detection switch is used to ensure the accurate delivery of the fungus bag; the design of the bag delivery roller device ensures that the fungus bag remains stable during the delivery process;
[0025] Optimization of bag cutting device: the cooperation of cutting cylinder and bag pressing cylinder ensures accurate cutting of fungus bags;
[0026] Optimization of bag suction and moving device: flexible and stable transfer of fungus bags is achieved through bag opening synchronization plate, bag transfer drive motor and bag rubbing spring and other components;
[0027] The edible fungus bag production equipment realizes automatic feeding, cutting and transfer of fungus bags through optimized layout and design. Its working principle is clear, and the optimal solution further improves the performance and stability of the equipment, meeting the efficient and continuous production needs of edible fungus production. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0029] Figure 2 This is a schematic diagram of the top view structure of the utility model;
[0030] Figure 3 This is a schematic diagram of the structure of the bag feeding roller device of the utility model from a top view;
[0031] Figure 4 This is a schematic diagram of the structure of the bag cutting device of the utility model;
[0032] Figure 5 This is a front structural schematic diagram of the bag feeding roller device of the utility model;
[0033] Figure 6 This is a schematic diagram of the structure of the bag suction device of the utility model from a top view;
[0034] Figure 7 This is a front structural schematic diagram of the bag suction device of the utility model;
[0035] Figure 8 This is a side structural schematic diagram of the bag suction device of the utility model;
[0036] In the figure: 1. box body; 2. air expansion shaft; 3. bag buffer; 4. bag feeding device; 5. bag rolling motor; 6. bag feeding motor; 7. bag feeding active roller; 8. pressure roller buckle plate; 9. pressure roller fixing buckle; 10. cutter frame; 11. cutter guide rail; 12. cutter cylinder; 13. frame one; 14. bag pressing cylinder; 15. sliding motor; 16. box suction fan; 17. air duct frame; 18. frame two; 19. box suction duct; 20. bag opening synchronous belt drive device; 21. bag opening motor; 22. bag transfer rack; 23. synchronous plate one; 24. synchronous plate two; 25. bag rubbing fixed block; 26. bag opening suction box; 27. suction box mounting tube; 28. baffle; 29. gear; 30. bag transfer drive motor; 31. bag transfer track; 32. bag rubbing slide rail; 33. bag rubbing spring. DETAILED DESCRIPTION
[0037] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0038] See also Figure 1-8 The utility model is a three-station roll bag feeding device for edible mushroom bags, comprising a box body 1, a bag feeding device 4, a bag cutting device and a bag suction moving device, wherein the bag feeding device 4, the bag cutting device and the bag suction moving device are arranged in the box body 1;
[0039] The bag delivery device 4 includes an air shaft 2 of groups A, B, and C, a bag rolling motor 5, a bag buffer 3, a bag buffer induction switch, a bag delivery active roller 7, and a bag delivery pressure roller device. The three groups of air shafts 2 are used to place a whole roll of bag. The bag rolling motor 5 drives the air shaft 2 to rotate and place the bag. The bag buffer induction switch cooperates with the bag buffer 3 to control the rotation of the bag rolling motor 5. The bag delivery active roller 7 and the bag delivery pressure roller device work together to deliver the bag to the specified position.
[0040] The bag cutting device comprises a bag pressing cylinder 14, a frame 13, a bag cutting soft block, a cutter cylinder 12, a cutter frame 10, a cutter guide rail 11 and a cutter. The bag pressing cylinder 14 drives the bag cutting soft block to press the mushroom bag onto the frame 13, and the cutter cylinder 12 drives the cutter frame 10 to reciprocate under the guidance of the cutter guide rail 11 to cut the mushroom bag.
[0041] The bag suction moving device includes a bag opening motor 21, a bag opening synchronous belt driving device 20, a bag opening synchronous plate, a bag opening suction box 26, a suction box fan 16, an air suction switching valve, a suction box mounting tube 27, a bag moving driving motor 30 and a bag moving track 31. The bag opening motor 21 drives the bag opening synchronous plate to move left and right through the bag opening synchronous belt driving device 20. The bag opening suction box 26 is installed on the suction box mounting tube 27 and is driven by the synchronous plate to realize the merging and separation actions. The suction box fan 16 and the air suction switching valve work together to generate negative pressure to suck the bag mouth. The bag moving driving motor 30 drives the suction box to move along the bag moving track 31.
[0042] In the preferred embodiment of the three-station roll bag feeding device 4 and the bag production equipment for edible fungi bags, the bag feeding device 4 and the bag cutting device are installed on the upper half of the box body 1, the bag suction moving device is located in the lower half of the box body 1, the bag cutting device is located between the bag suction moving device and the bag feeding roller device, the inflatable shafts are arranged in two groups above the bag feeding roller device, and the other group is arranged on the left side of the bag cutting device and the bag feeding pressing device. The bag buffer 3 is arranged around the three groups of air shafts 2 and the outer sides of the bag feeding and pressing device, and the bag buffer 3 is installed on the box body 1 to move up and down. The bag rolling motor 5 is fixedly installed on the outer wall of the box body 1, and the air shaft 2 is rotatably installed in the box body 1, and the output end of the bag rolling motor 5 is connected with the air shaft 2. The bag feeding device 4 also includes a detection switch, which is used to detect the bag spacing and the sealing line of the bag. The active bag feeding roller 7 is driven by the bag feeding motor 6. The bag feeding pressing roller device includes a pressing roller buckle plate 8 and a pressing roller fixing buckle 9. The pressing roller buckle plate 8 is hinged on the active bag feeding roller 7. The pressing roller fixing buckle 9 is elastically installed on the pressing roller buckle plate 8 through a tension spring. The pressing roller fixing buckle 9 is used to press the bag on the active bag feeding roller 7.
[0043] Layout: The bag feeding device 4 is installed in the upper part of the box body 1, adjacent to the bag cutting device;
[0044] Composition: including the air shaft 2 of groups A, B and C, the bag rolling motor 5, the fungus bag buffer 3, the bag buffer induction switch, the bag feeding active roller 7 and the bag feeding pressing roller device;
[0045] The three sets of air shafts 2 are used to place the whole roll of mushroom bags, and the bag rolling motor 5 drives the air shaft 2 to rotate to release the mushroom bags. The bag buffer induction switch works with the bag buffer 3. When the length of the mushroom bag reaches the preset value, the bag rolling motor 5 is controlled to stop rotating. The bag feeding active roller 7 and the bag feeding pressure roller device work together to convey the mushroom bag to the specified position through friction;
[0046] Optimized features: The detection switch is used to detect the spacing and sealing line position of the mushroom bags to ensure accurate transmission and cutting of the mushroom bags.
[0047] In the above-mentioned preferred embodiment of the three-station roll bag feeding device 4 for edible mushroom bags and the bag production equipment, the cutter cylinder 12 is fixedly mounted on the cutter frame 10, the cutter frame 10 is slidably mounted on the cutter guide rail 11 through the cutter cylinder 12, a cutter is fixedly mounted on the bottom of the cutter frame 10, the bag pressing cylinder 14 is fixedly mounted on the frame 13, and the frame 13 is slidably mounted on the cutter guide rail 11 through the sliding motor 15;
[0048] Layout: Located between the bag feeding roller device and the bag suction moving device;
[0049] Composition: including bag pressing cylinder 14, bag cutting soft block, cutter cylinder 12, cutter frame 10, cutter guide rail 11 and cutter;
[0050] Working principle: The bag pressing cylinder 14 drives the bag cutting soft block to fix the mushroom bag on the frame, and then the cutter cylinder 12 drives the cutter frame 10 to reciprocate on the cutter guide rail 11, and the cutter at the bottom is used to cut the mushroom bag to achieve the separation of the mushroom bag.
[0051] In the preferred embodiment of the three-station roll bag feeding device 4 for edible fungi bags and the bag production equipment, the bag suction moving device also includes a frame 2 18 and a bag rubbing fixed block 25, a duct rack 17 is provided at the bottom of the frame 2 18, the suction switching valve is fixedly installed on the duct rack 17, the bag opening synchronization plate includes a synchronization plate 1 23 and a synchronization plate 2 24, the bag transfer track 31 is installed in the Y direction on the frame 2 18 and is located above the duct rack 17, the bag transfer drive motor 30 is located below the frame 2, a bag rubbing slide rail 32 is installed on the synchronization plate 1 23, a bag transfer rack 22 is provided below the frame 2, the output end of the bag transfer drive motor 30 is adapted to the bag transfer rack 22 through a gear 29, the synchronization plate 1 23 and the synchronization plate 2 24 are slidably installed on the frame 2 18, and the bag opening The synchronous belt driving device 20 is fixedly mounted on one end of the frame 18 and is adapted to the synchronous plate 24. The bag opening synchronous belt driving device 20 is driven by the bag opening motor 21. The suction box mounting tube 27 is connected to the suction switching valve through the suction box air duct 19. The bag opening suction box 26 includes a left suction box and a right suction box. The left suction box is fixedly mounted on the synchronous plate 24 through the suction box mounting tube 27. The right suction box is fixedly mounted on the synchronous plate 1 23 through the suction box mounting tube 27. The bag rubbing fixed block 25 is fixedly mounted on the frame 18. The suction box mounting tube 27 of the right suction box is provided with a baffle 28. The suction box mounting tube 27 of the right suction box passes through the bag rubbing fixed block 25, and the baffle 28 is adapted to the bag rubbing fixed block 25. A bag rubbing spring 33 is connected between the bag rubbing slide rail 32 and the frame 18.
[0052] Layout: Located in the lower part of the box 1, receiving the cut mushroom bags;
[0053] Composition: including a bag opening motor 21, a bag opening synchronous belt driving device 20, a bag opening synchronous plate, a bag opening suction box 26, a suction box fan 16, an air suction switching valve, a suction box mounting tube 27, a bag transfer driving motor 30 and a bag transfer track 31;
[0054] Working principle: The bag opening motor 21 drives the bag opening synchronous plate to move left and right through the bag opening synchronous belt driving device 20. The bag opening suction box 26 is installed on the suction box mounting tube 27, and is driven by the synchronous plate to realize the merging and separation actions. The suction box fan 16 and the suction switching valve work together to generate negative pressure to suck the bag opening. The bag transfer drive motor 30 drives the suction box to move along the bag transfer track 31, thereby realizing the transfer of the fungus bag.
[0055] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A three-station roll bag feeding device for edible mushroom bags, characterized in that: It comprises a box body (1), a bag conveying device (4), a bag cutting device and a bag suction moving device, wherein the bag conveying device (4), the bag cutting device and the bag suction moving device are arranged in the box body (1); The bag delivery device (4) comprises an air shaft (2) of groups A, B and C, a bag rolling motor (5), a bag buffer (3), a bag buffer induction switch, a bag delivery active roller (7) and a bag delivery pressure roller device. The three air shafts (2) are used to place a whole roll of bag. The bag rolling motor (5) drives the air shaft (2) to rotate and place the bag. The bag buffer induction switch cooperates with the bag buffer (3) to control the rotation of the bag rolling motor (5). The bag delivery active roller (7) and the bag delivery pressure roller device work together to deliver the bag to a designated position. The bag cutting device comprises a bag pressing cylinder (14), a frame (13), a bag cutting soft block, a cutter cylinder (12), a cutter frame (10), a cutter guide rail (11) and a cutter. The bag pressing cylinder (14) drives the bag cutting soft block to press the mushroom bag onto the frame (13), and the cutter cylinder (12) drives the cutter frame (10) to reciprocate under the guidance of the cutter guide rail (11) to cut the mushroom bag. The bag suction moving device comprises a bag opening motor (21), a bag opening synchronous belt driving device (20), a bag opening synchronous plate, a bag opening suction box (26), a suction box fan (16), an air suction switching valve, a suction box mounting tube (27), a bag transfer driving motor (30) and a bag transfer track (31). The bag opening motor (21) drives the bag opening synchronous plate to move left and right through the bag opening synchronous belt driving device (20). The bag opening suction box (26) is mounted on the suction box mounting tube (27) and driven by the synchronous plate to achieve merging and separation. The suction box fan (16) and the air suction switching valve work together to generate negative pressure to suck the bag opening. The bag transfer driving motor (30) drives the suction box to move along the bag transfer track (31).
2. The three-station roll bag feeding device for edible fungi bags according to claim 1 is characterized in that: The bag feeding device (4) and the bag cutting device are installed on the upper part of the box body (1), the bag suction moving device is located on the lower part of the box body (1), and the bag cutting device is located between the bag suction moving device and the bag feeding roller device.
3. The three-station roll bag feeding device for edible mushroom bags according to claim 2 is characterized in that: The inflatable shafts (2) are arranged in one group above the bag feeding and pressing roller device, and the other two groups are arranged between the bag cutting device and the bag feeding and pressing device.
4. The three-station roll bag feeding device for edible mushroom bags according to claim 3 is characterized in that: The mushroom bag caching member (3) is arranged around the three groups of inflatable shafts (2) and the outer sides of the bag feeding and pressing device, and the mushroom bag caching member (3) is rotatably mounted on the box body (1).
5. The three-station roll bag feeding device for edible fungi bags according to claim 4, characterized in that: The bag rolling motor (5) is fixedly mounted on the outer wall of the box (1), the air shaft (2) is rotatably mounted in the box (1), and the output end of the bag rolling motor (5) is connected to the air shaft (2).
6. The three-station roll bag feeding device for edible mushroom bags according to claim 5, characterized in that: The bag feeding device (4) also includes a detection switch, which is used to detect the bag spacing and the sealing line of the bag. The active bag feeding roller (7) is driven by the bag feeding motor (6). The bag feeding pressing roller device includes a pressing roller buckle plate (8) and a pressing roller fixing buckle (9). The pressing roller buckle plate (8) is hinged on the active bag feeding roller (7). The pressing roller fixing buckle (9) is elastically mounted on the pressing roller buckle plate (8) through a tension spring. The pressing roller fixing buckle (9) is used to press the bag onto the active bag feeding roller (7).
7. The three-station roll bag feeding device for edible fungi bags according to claim 6, characterized in that: The cutter cylinder (12) is fixedly mounted on the cutter frame (10), and the cutter frame (10) is slidably mounted on the cutter guide rail (11) through the cutter cylinder (12). A cutter is fixedly mounted on the bottom of the cutter frame (10), and the bag pressing cylinder (14) is fixedly mounted on the frame one (13), and the frame one (13) is slidably mounted on the cutter guide rail (11) through a sliding motor (15).
8. The three-station roll bag feeding device for edible fungi bags according to claim 7, characterized in that: The bag suction moving device also includes a frame 2 (18) and a bag rubbing fixed block (25). The bottom of the frame 2 (18) is provided with an air duct frame (17). The air suction switching valve is fixedly mounted on the air duct frame (17). The bag opening synchronous plate includes a synchronous plate 1 (23) and a synchronous plate 2 (24). The bag moving track (31) is mounted on the frame in the Y direction and is located above the air duct frame (17). The bag moving driving motor (30) is located on the side of the bag moving track (31). A bag rubbing slide rail (32) is slidably mounted on the synchronous plate 1 (23). A bag moving rack (22) is arranged on the bag rubbing slide rail (32). The output end of the bag moving driving motor (30) is adapted to the bag moving rack (22) through a gear (29). The synchronous plate 1 (23) is fixedly mounted on the top of the bag rubbing slide rail (32). The synchronous plate 2 (24) is slidably mounted on the frame 2 (1 8), and the bag opening synchronous belt driving device (20) is fixedly mounted on one end of the frame two (18) and matched with the synchronous plate two (24), the bag opening synchronous belt driving device (20) is driven by the bag opening motor (21), the suction box mounting pipe (27) is connected with the suction switching valve through the suction box air duct (19), the bag opening suction box (26) comprises a left suction box and a right suction box, the left suction box is fixedly mounted on the synchronous plate two (24) through the suction box mounting pipe (27), the right suction box is fixedly mounted on the synchronous plate one (23) through the suction box mounting pipe (27), the bag rubbing fixed block (25) is fixedly mounted on the frame two (18), the suction box mounting pipe (27) of the right suction box is provided with a baffle (28), the suction box mounting pipe (27) of the right suction box passes through the bag rubbing fixed block (25), and the baffle (28) is matched with the bag rubbing fixed block (25).
9. The three-station roll bag feeding device for edible fungi bags according to claim 8, characterized in that: A bag rubbing spring (33) is connected between the bag rubbing slide rail (32) and the second frame (18).