Waste ABS (Acrylonitrile Butadiene Styrene) recycling equipment

Abstract

The invention provides waste ABS (Acrylonitrile Butadiene Styrene) recycling equipment, and belongs to the technical field of ABS plastic recycling. The equipment comprises an annular guide rail conveying line, a cleaning box, a guide frame, a loading cylinder and a guide rack. Partition plates are arranged in the cleaning box and divide the cleaning box into a cleaning cavity, a flushing cavity and a dewatering cavity. The guide frame is located above the annular guide rail conveying line, and a guide groove is formed in the guide frame; the loading cylinder is connected with the annular guide rail conveying line, the loading cylinder is driven by the annular guide rail conveying line to circularly move in the cleaning cavity, the flushing cavity and the dewatering cavity, and the loading cylinder is guided by the guide groove to ascend and descend in the cleaning box; the guide rack is arranged on the guide frame, and the loading cylinder is driven by the guide rack to rotate in the dewatering cavity. The invention particularly provides waste ABS (Acrylonitrile Butadiene Styrene) recycling equipment capable of continuously cleaning, flushing and spin-drying waste ABS plastics.

Description

Technical Field

[0001] The present invention belongs to the technical field of ABS plastic recycling, and specifically relates to a waste ABS recycling device. Background Art

[0002] ABS plastic is a terpolymer of three monomers, acrylonitrile, butadiene, and styrene. The relative contents of the three monomers can vary arbitrarily to form various resins. ABS plastic is a "tough, hard, and rigid" material with easily available raw materials, good comprehensive performance, low price, and wide applications. In recent years, with the continuous expansion of the consumer market, the quantity of waste ABS plastic has been increasing year by year. Recycling ABS plastic can not only reduce environmental pollution but also effectively save resources and reduce energy consumption.

[0003] During the recycling process of ABS plastic, it needs to be cleaned to remove foreign substances on its surface. To ensure the cleanliness of ABS plastic, waste ABS plastic needs to be processed through steps such as cleaning with cleaning liquid, rinsing, and centrifugal drying in sequence. Existing cleaning equipment for ABS plastic recycling has the problem of difficult salvage after cleaning, which is not conducive to waste ABS entering the next process, resulting in poor continuity when waste ABS plastic is processed through the above steps. Summary of the Invention

[0004] In view of the above situation, to overcome the defects of the prior art, the present invention provides a waste ABS recycling device to at least partially solve the problems raised in the above background art.

[0005] The present invention provides the following technical solutions: A waste ABS recycling device proposed by the present invention includes: A circular guide rail conveyor line; A cleaning tank, which is provided with a partition board inside. The partition board divides the cleaning tank into a cleaning chamber, a rinsing chamber, and a dehydration chamber. The rinsing chamber is arranged between the cleaning chamber and the dehydration chamber; A guiding frame, located above the circular guide rail conveyor line (1), and is provided with guiding grooves thereon; A loading cylinder, connected to the circular guide rail conveyor line. The loading cylinder is driven by the circular guide rail conveyor line to move in a cycle within the cleaning chamber, the rinsing chamber, and the dehydration chamber, and the loading cylinder is guided by the guiding grooves to lift and lower within the cleaning tank. When the loading cylinder moves above the partition board, it rises, and when the loading cylinder moves above the cleaning chamber, the rinsing chamber, and the dehydration chamber, it descends; A guiding rack, arranged on the guiding frame. The loading cylinder is driven by the guiding rack to rotate within the dehydration chamber.

[0006] Further, the guiding groove includes a lifting groove, a connecting groove, and a pressing-down groove. Two sets of connecting grooves are symmetrically arranged at both ends of the pressing-down groove. Two sets of lifting grooves are correspondingly arranged with the connecting grooves. One end of the lifting groove is connected to the connecting groove. The lifting groove is used to guide the loading cylinder to lift and pass above the partition board, and the pressing-down groove is used to guide the loading cylinder to fall into the cleaning tank.

[0007] Further, there are four sets of guiding grooves. Three sets of guiding grooves respectively correspond to the cleaning chamber, the flushing chamber, and the dehydration chamber. The lower part corresponding to the other set of guiding grooves is the loading and unloading station. The lifting grooves of adjacent two sets of guiding grooves are connected.

[0008] Further, a mounting seat is provided on the annular guide rail conveyor line. The lower surface of the end of the mounting seat away from the annular guide rail conveyor line is provided with support legs, and universal wheels are provided at the lower ends of the support legs.

[0009] Further, a lifting groove is formed on the mounting seat. The loading cylinder is configured to slide up and down in the loading cylinder under the guidance of the guiding groove. A sliding column is engaged and slidably arranged in the guiding groove. A load-bearing rod is provided at the lower end of the sliding column. An installation table is provided at the lower end of the load-bearing rod. The loading cylinder is rotatably arranged on the installation table. A driving gear is rotatably arranged on the installation table. When the driving gear is conveyed by the annular guide rail conveyor line to engage with the guiding rack, it is configured to engage with the guiding rack and be driven to rotate by the guiding rack. A driven gear is fixedly arranged on the loading cylinder, and the driven gear meshes with the driving gear.

[0010] Further, there are two sets of guiding frames. Two sets of load-bearing rods are symmetrically arranged on both sides of the installation table. The sliding columns installed on the two sets of load-bearing rods are respectively engaged and slidably arranged in the guiding grooves of the two sets of guiding frames.

[0011] Further, the length of the sliding column is greater than the depth of the guiding groove.

[0012] Further, the middle and lower part of the loading cylinder is a net cylinder structure. A discharging mechanism is provided at the lower end of the loading cylinder. The discharging mechanism includes a blanking cylinder, a rotating shaft, and a baffle. The blanking cylinder is fixedly arranged at the outlet end of the loading cylinder. The rotating shaft is rotatably arranged on the side wall of the blanking cylinder. A plurality of groups of baffles are evenly arranged on the rotating shaft. A temporary storage cavity is provided between adjacent two groups of baffles. One end of the rotating shaft penetrates through the side wall of the blanking cylinder and extends outside the blanking cylinder. A rocking handle shaft is provided at the end of the rotating shaft extending outside the blanking cylinder.

[0013] Further, a stirring mechanism or an ultrasonic cleaning mechanism is provided in the cleaning chamber to improve the cleaning efficiency and effect of waste ABS.

[0014] The beneficial effects achieved by the present invention with the above structure are as follows: 1. By setting up the annular guide rail conveyor line, the loading cylinder is driven to move relative to the cleaning chamber, rinsing chamber and dehydration chamber, and under the limit guidance of the lifting groove, connection groove and pressing groove, the loading cylinder is driven to lift and lower in the cleaning chamber, rinsing chamber and dehydration chamber in sequence, realizing the continuous processing of the cleaning, rinsing and drying steps of the waste ABS in the loading cylinder, and improving the recycling and cleaning efficiency of the waste ABS.

[0015] 2. By setting up the loading cylinder, the loading-type cleaning and recycling treatment of the waste ABS is realized, there is no need to salvage the waste ABS again after cleaning, and the feeding of the waste ABS in the loading cylinder is facilitated through the setting of the discharging mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention, and do not constitute a limitation to the present invention. In the drawings: Figure 1 is the overall structural schematic diagram of the embodiment of the present invention; Figure 2 is the three-dimensional structural schematic diagram in the top view direction of the embodiment of the present invention; Figure 3 is Figure 2 the partial enlarged view of part A of Figure 4 is the three-dimensional sectional structural schematic diagram in the side view direction of the embodiment of the present invention; Figure 5 is Figure 4 the partial enlarged view of part B of Figure 6 is the three-dimensional sectional structural schematic diagram of the loading cylinder and the discharging mechanism of the embodiment of the present invention.

[0017] Among them, 1. annular guide rail conveyor line, 2. cleaning box, 3. partition board, 4. cleaning chamber, 5. rinsing chamber, 6. dehydration chamber, 7. loading cylinder, 8. guiding groove, 9. guiding rack, 10. lifting groove, 11. connection groove, 12. pressing groove, 13. mounting seat, 14. support leg, 15. universal wheel, 16. lifting groove, 17. sliding column, 18. load-bearing rod, 19. mounting table, 20. driving gear, 21. driven gear, 22. feeding cylinder, 23. rotating shaft, 24. baffle plate, 25. temporary storage chamber, 26. rocking handle shaft, 27. loading and unloading station, 28. guiding frame. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0019] It should be noted that the terms "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the directions in the accompanying drawings, and the terms "inner" and "outer" respectively refer to the directions towards or away from the geometric center of a specific component.

[0020] Refer to Figures 1 - 4 , a waste ABS recycling device provided in this embodiment includes: An annular guide rail conveyor line 1; A cleaning tank 2, which is provided with a partition 3 inside. The partition 3 divides the cleaning tank 2 into a cleaning chamber 4, a rinsing chamber 5 and a dehydration chamber 6. The rinsing chamber 5 is arranged between the cleaning chamber 4 and the dehydration chamber 6. The cleaning chamber 4 is filled with a cleaning liquid, and the ABS plastic particles are cleaned in the cleaning chamber 4 to remove surface dirt and foreign matters. The rinsing chamber 5 is filled with clean water, and the residual cleaning liquid on the ABS plastic particles is rinsed by the clean water in the rinsing chamber 5. The ABS that has completed cleaning is dehydrated in the dehydration chamber 6; A loading cylinder 7, which is connected to the annular guide rail conveyor line 1. The loading cylinder 7 is driven by the annular guide rail conveyor line 1 to move cyclically in the cleaning chamber 4, the rinsing chamber 5 and the dehydration chamber 6. Through the cyclic movement of the loading cylinder 7, the waste ABS in the loading cylinder 7 is continuously cleaned, rinsed and dried; A guiding frame 28, which is located above the annular guide rail conveyor line. A guiding groove 8 is provided on it. The loading cylinder 7 is guided by the guiding groove 8 to lift in the cleaning tank 2. When the loading cylinder 7 moves above the partition 3, it rises, and it can smoothly pass above the partition 3 through the rising of the loading cylinder 7. When the loading cylinder 7 moves above the cleaning chamber 4, the rinsing chamber 5 and the dehydration chamber 6, it descends, and the waste ABS is processed in the cleaning tank 2 by the falling of the loading cylinder 7; A guiding rack 9, which is arranged on the guiding frame 28. The loading cylinder 7 is driven by the guiding rack 9 to rotate in the dehydration chamber 6. Through the rotation of the loading cylinder 7, the waste ABS after cleaning is dehydrated, which is convenient for the next process treatment of the waste ABS.

[0021] It should be known that drain pipes are provided on the side walls of the cleaning chamber 4, the rinsing chamber 5 and the dehydration chamber 6, and a water adding pipe is provided on the side wall of the rinsing chamber 5. Through the cooperation of the water adding pipe and the drain pipe on the rinsing chamber 5, the circulation of the clean water in the rinsing chamber 5 is completed to ensure the rinsing effect.

[0022] It should be noted that the annular guide rail conveyor line 1 used in this embodiment is a prior art, so its basic structure and working principle will not be introduced again.

[0023] During operation, the rotation of the annular guide rail conveyor line 1 drives the loading cylinder 7 to move in the cleaning chamber 4, the rinsing chamber 5 and the dehydration chamber 6 of the cleaning box 2 in sequence. When the loading cylinder 7 moves into the cleaning chamber 4, the waste ABS is cleaned by the cleaning liquid in the cleaning chamber 4. When it moves into the rinsing chamber 5, the cleaning liquid on the surface of the waste ABS is rinsed by the clean water in the rinsing chamber 5. When it moves into the dehydration chamber 6, the loading cylinder 7 is driven to rotate under the action of the guide rack 9 to centrifugally dehydrate the waste ABS. Moreover, through the setting of the guide groove 8, when the loading cylinder 7 moves to the top of the partition 3, the loading cylinder 7 is driven to move upward, and the loading box can pass smoothly over the partition 3, thereby completing the continuous processing of cleaning, rinsing and dehydrating the waste ABS.

[0024] Specifically, see Figure 1 In this embodiment, the guide groove 8 includes a lifting groove 10, a connecting groove 11 and a pressing groove 12. The connecting groove 11 is symmetrically provided with two groups at both ends of the pressing groove 12. The lifting groove 10 and the connecting groove 11 are correspondingly provided with two groups. One end of the lifting groove 10 is connected to the connecting groove 11. The connecting groove 11 is an inclined groove. The lifting groove 10 is used to guide the loading cylinder 7 to lift and pass over the partition 3, and the pressing groove 12 is used to guide the loading cylinder 7 to fall into the cleaning box 2.

[0025] In this embodiment, the lifting principle of the loading cylinder 7 is as follows: the horizontal driving force applied by the annular guide rail conveyor line 1 to the loading cylinder 7 is decomposed into a driving force along the direction of the connecting groove 11 and a force perpendicular to the direction of the connecting groove 11 under the guidance of the connecting groove 11. The driving force along the direction of the connecting groove 11 can drive the loading cylinder 7 to rise and fall in the vertical direction.

[0026] Specifically, in the present embodiment, four groups of guide grooves 8 are provided, three groups of guide grooves 8 correspond to the cleaning chamber 4, the rinsing chamber 5 and the dehydration chamber 6 respectively, and the lower part of the other group of guide grooves 8 corresponds to the loading and unloading station 27, and the loading and unloading of waste ABS is completed through the loading and unloading station 27, and the lifting grooves 10 of two adjacent groups of guide grooves 8 are connected, and the three groups of guide grooves 8 corresponding to the cleaning chamber 4, the rinsing chamber 5 and the dehydration chamber 6 cooperate to complete the cleaning of the waste ABS in sequence, and under the action of the other group of guide grooves 8, the waste ABS after cleaning, rinsing and drying is guided to the receiving mechanism of the next process for processing in the next process.

[0027] Specifically, see Figure 1 , Figure 4 and Figure 5, in this embodiment, a mounting seat 13 is provided on the annular guide rail conveyor line 1. A support leg 14 is provided on the lower surface of the end of the mounting seat 13 away from the annular guide rail conveyor line 1. A universal wheel 15 is provided at the lower end of the support leg 14. When the annular guide rail conveyor line 1 rotates in a cycle, it drives the mounting seat 13 to move in a cycle, and the support stability of the mounting seat 13 is improved through the cooperation of the support leg 14 and the universal wheel 15.

[0028] Specifically, referring to Figure 1 , Figure 4 and Figure 5 , in this embodiment, a lifting groove 16 is formed in the mounting seat 13. The loading cylinder 7 is configured to slide up and down in the loading cylinder 7 under the guidance of the guiding groove 8. A sliding column 17 is engaged and slidably provided in the guiding groove 8. A load-bearing rod 18 is provided at the lower end of the sliding column 17. A mounting table 19 is provided at the lower end of the load-bearing rod 18. The loading cylinder 7 is rotatably provided on the mounting table 19. A driving gear 20 is rotatably provided on the mounting table 19. When the driving gear 20 is transported by the annular guide rail conveyor line 1 to engage with the guiding rack 9, it is configured to engage with the guiding rack 9 and be driven to rotate by the guiding rack 9. A driven gear 21 is fixedly provided on the loading cylinder 7, and the driven gear 21 meshes with the driving gear 20.

[0029] During operation, when the annular guide rail conveyor line 1 drives the mounting seat 13 to move to a position corresponding to the dehydration chamber 6, the driving gear 20 moves to engage with the guiding rack 9. And with the driving of the rotation of the annular guide rail conveyor line 1, under the action of the guiding gear, the driving gear 20 rotates. The driving gear 20 drives the driven gear 21 to rotate, thereby driving the loading cylinder 7 to rotate on the mounting table 19. The rotating loading cylinder 7 is dehydrated under the action of rotational centrifugal force.

[0030] Specifically, referring to Figure 4 , in this embodiment, two sets of guiding frames 28 are provided. Two sets of load-bearing rods 18 are symmetrically provided on both sides of the mounting table 19. The sliding columns 17 mounted on the two sets of load-bearing rods 18 are respectively engaged and slidably provided in the guiding grooves 8 of the two sets of guiding frames 28. The stability of the lifting guidance of the loading cylinder 7 is improved through the cooperation of the two sets of guiding frames 28; the length of the sliding column 17 is greater than the depth of the guiding groove 8. When the sliding column 17 moves to the corner of the guiding frame 28 along with the annular guide rail conveyor line 1, the horizontal sliding of the sliding column 17 in the guiding groove 8 adapts to the movement at the corner position.

[0031] Specifically, referring to Figure 4 and Figure 6, in this embodiment, the middle and lower part of the loading cylinder 7 is a net cylinder structure. Through the net cylinder structure, the waste ABS in the loading cylinder 7 is cleaned and dehydrated. A discharging mechanism is provided at the lower end of the loading cylinder 7. The discharging mechanism includes a blanking cylinder 22, a rotating shaft 23 and a baffle 24. The blanking cylinder 22 is fixedly arranged at the outlet end of the loading cylinder 7. The rotating shaft 23 is rotatably arranged on the side wall of the blanking cylinder 22. A plurality of groups of baffles 24 are evenly arranged on the rotating shaft 23. A temporary storage cavity 25 is arranged between two adjacent groups of baffles 24. One end of the rotating shaft 23 penetrates through the side wall of the blanking cylinder 22 and extends outside the blanking cylinder 22. A crank handle shaft 26 is arranged at the end of the rotating shaft 23 extending outside the blanking cylinder 22.

[0032] During operation, when the loading cylinder 7 is moved out of the cleaning tank 2, the crank handle shaft 26 is driven to rotate by a crank handle adapted to the crank handle shaft 26. The crank handle shaft 26 drives the rotating shaft 23 to rotate. The rotating shaft 23 drives the baffle 24 to rotate. The waste ABS after cleaning in the temporary storage cavity 25 is pushed out with the rotation of the baffle 24 to complete the discharging.

[0033] As a specific embodiment of the present invention, a stirring mechanism or an ultrasonic cleaning mechanism is arranged in the cleaning cavity 4 to improve the cleaning efficiency and effect of the waste ABS.

[0034] The working principle of a waste ABS recycling device provided in this embodiment is as follows: (1) The waste ABS is loaded into the loading cylinder 7 at the loading and unloading station 27. The annular guide rail conveying line 1 drives the mounting seat 13 to move. The cooperation of the universal wheels 15 and the support legs 14 ensures the moving stability of the mounting seat 13.

[0035] (2) During the process of the annular guide rail conveying line 1 driving the loading cylinder 7 to move, the loading cylinder 7 is lifted and lowered through the cooperation of the lifting groove 10, the connecting groove 11 and the pressing groove 12. Specifically, when the loading cylinder 7 moves to the partition plate 3, it is lifted by the lifting groove 10. When it moves to the cleaning cavity 4, the flushing cavity 5 and the dehydration cavity 6, it slides into the pressing groove 12 along the connecting groove 11. And when it moves to the dehydration cavity 6, through the meshing of the driving gear 20 and the guiding rack 9, and the meshing of the driving gear 20 and the driven gear 21, the loading cylinder 7 is driven to rotate on the mounting table 19, realizing the continuous cleaning, flushing and dehydration of the waste ABS plastic in the loading cylinder 7.

[0036] (3) When the waste ABS after cleaning, flushing and dehydration is moved back to the loading and unloading station 27, the rotating shaft 23 is driven to rotate by the engagement installation of the crank handle and the crank handle shaft 26. The rotating shaft 23 drives the baffle 24 to rotate, and the efficient and fast blanking of the waste ABS after cleaning can be realized.

[0037] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, material or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, material or device.

[0038] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A waste ABS recycling device, characterized in that: include: Annular guide rail conveyor line (1); A cleaning box (2) having a partition (3) therein, wherein the partition (3) divides the cleaning box (2) into a cleaning chamber (4), a rinsing chamber (5) and a dehydration chamber (6); A guide frame (28) is located above the annular guide rail conveyor line (1) and is provided with a guide groove (8); A loading cylinder (7) is connected to the annular guide rail conveyor line (1), and the loading cylinder (7) is driven by the annular guide rail conveyor line (1) to circulate in the cleaning chamber (4), the rinsing chamber (5) and the dehydration chamber (6), and the loading cylinder (7) is guided by the guide groove (8) to rise and fall in the cleaning box (2); The guide rack (9) is arranged on the guide frame (28), and the loading cylinder (7) is driven by the guide rack (9) to rotate in the dehydration chamber (6).

2. The waste ABS recycling equipment according to claim 1, characterized in that: The guide groove (8) comprises a lifting groove (10), a connecting groove (11) and a pressing groove (12); the connecting groove (11) is symmetrically provided with two groups at both ends of the pressing groove (12); the lifting groove (10) and the connecting groove (11) are correspondingly provided with two groups; one end of the lifting groove (10) is connected to the connecting groove (11); the lifting groove (10) is used to guide the loading cylinder (7) to be lifted and pass over the partition (3); and the pressing groove (12) is used to guide the loading cylinder (7) to fall into the cleaning box (2).

3. The waste ABS recycling equipment according to claim 2 is characterized in that: The guide grooves (8) are provided in four groups, three groups of the guide grooves (8) respectively correspond to the cleaning chamber (4), the rinsing chamber (5) and the dehydration chamber (6), and another group of the guide grooves (8) corresponds to a loading and unloading station (27) below, and the lifting grooves (10) of two adjacent groups of the guide grooves (8) are connected.

4. The waste ABS recycling equipment according to claim 3 is characterized in that: A mounting seat (13) is provided on the annular guide rail conveyor line (1), a support leg (14) is provided on the lower surface of one end of the mounting seat (13) away from the annular guide rail conveyor line (1), and a universal wheel (15) is provided at the lower end of the support leg (14).

5. The waste ABS recycling equipment according to claim 1, characterized in that: The mounting seat (13) is provided with a lifting groove (16). The loading cylinder (7) is configured to be guided by the guide groove (8) to slide and lift in the loading cylinder (7). A sliding column (17) is provided in the guide groove (8) for engagement and sliding. A load-bearing rod (18) is provided at the lower end of the sliding column (17). A mounting platform (19) is provided at the lower end of the load-bearing rod (18). The loading cylinder (7) is rotatably mounted on the mounting platform (19). A driving gear (20) is rotatably mounted on the mounting platform (19). When the driving gear (20) is transported by the annular guide rail conveyor line (1) to mesh with the guide rack (9), the driving gear (20) is configured to mesh with the guide rack (9) and be driven to rotate by the guide rack (9). A driven gear (21) is fixedly provided on the loading cylinder (7). The driven gear (21) meshes with the driving gear (20).

6. The waste ABS recycling equipment according to claim 5, characterized in that: The guide frames (28) are provided with two groups, and the load-bearing rods (18) are symmetrically provided with two groups on both sides of the mounting platform (19). The sliding columns (17) installed on the two groups of the load-bearing rods (18) are respectively engaged and slidably arranged in the guide grooves (8) of the two groups of guide frames (28).

7. The waste ABS recycling equipment according to claim 6, characterized in that: The length of the sliding column (17) is greater than the depth of the guide groove (8).

8. The waste ABS recycling equipment according to claim 1, characterized in that: The lower middle part of the loading cylinder (7) is a mesh cylinder structure. The lower end of the loading cylinder (7) is provided with a discharge mechanism, and the discharge mechanism comprises a discharge cylinder (22), a rotating shaft (23) and a baffle (24). The discharge cylinder (22) is fixedly arranged at the outlet end of the loading cylinder (7). The rotating shaft (23) is rotatably arranged on the side wall of the discharge cylinder (22). A plurality of baffles (24) are evenly arranged on the rotating shaft (23). A temporary storage cavity (25) is provided between two adjacent groups of baffles (24). One end of the rotating shaft (23) passes through the side wall of the discharge cylinder (22) and extends to the outside of the discharge cylinder (22). A crank shaft (26) is provided on the end of the rotating shaft (23) extending to the outside of the discharge cylinder (22).

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