Small-sized all-in-one machine for dispensing and pulverizing traditional Chinese medicines
By integrating automatic dispensing, decoction, concentration, drying and partitioning machines, the problems of many equipment and low efficiency in the traditional Chinese medicine pharmaceutical process are solved, and a small all-in-one machine for dispensing and powdering of traditional Chinese medicine is realized, ensuring drying effect and convenience of automatic partitioning.
Patent Information
- Application Number
- CN202510297028.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-13
- Publication Date
- 2025-05-13
AI Technical Summary
In the process of traditional Chinese medicine, dispensing, decoding, drying and dispensing need to be carried out in different equipment, with low production efficiency, large equipment occupying a large space and complex operation, and the existing drying methods have insufficient time to dry the medicine liquid, resulting in poor drying effect.
It provides a small all-in-one machine for making Chinese medicine medicine, integrating automatic dispensing machine, decoction machine, concentrator, dryer and partitioning machine. The dryer adopts multiple drying components and conveying components to ensure the drying effect of the powder and automatic partitioning.
It realizes efficient integration of the powder making process of traditional Chinese medicine, reduces the equipment space, improves work efficiency, ensures the drying effect of the powder, and simplifies the process through automatic assembly.
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Figure CN119970511A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of traditional Chinese medicine, in particular to a small all-in-one machine for preparing and powdering traditional Chinese medicine. Background Art
[0002] In the traditional Chinese medicine pharmaceutical process, medicine preparation, decoction, drying and packaging are all independent and need to be carried out in different equipment, with low production efficiency. In addition, the equipment is generally large-scale pharmaceutical equipment, which not only takes up a large space but also is complicated to operate, which is not conducive to promotion and use. In addition, the existing Chinese medicine generally adopts atomization drying in the drying process, and the atomized medicine liquid is dried by hot air supplied to the atomizing nozzle. However, the medicine liquid falls before it can be dried, resulting in poor drying effect. Therefore, there is an urgent need for a small all-in-one machine for Chinese medicine preparation and powder making that can prepare medicine, decoction, dry and package medicine and has good drying effect. Summary of the invention
[0003] The purpose of the present invention is to provide a small all-in-one machine for preparing and powdering traditional Chinese medicines, so as to solve the problems existing in the above-mentioned prior art.
[0004] To achieve the above-mentioned purpose, the present invention provides the following scheme: The present invention provides a small all-in-one machine for preparing Chinese medicine powder, comprising an automatic dispensing machine, a decoction machine, a concentrator, a dryer and a filling machine which are arranged in sequence; the dryer comprises a drying box body, a first drying component is installed on the top of the drying box body, a liquid storage tank is fixedly connected to the outer wall of the drying box body, and the liquid storage tank is connected to the first drying component; a guide plate and a second drying component are fixedly connected in the drying box body, the guide plate is located between the first drying component and the second drying component and is arranged corresponding to the second drying component, a powder outlet pipe is arranged at the bottom of the second drying component, a conveying component is arranged at the bottom of the drying box body, one end of the conveying component is connected to the powder outlet pipe, and the other end of the conveying component is arranged corresponding to the top of the filling machine.
[0005] Preferably, the first drying component includes a centrifugal atomizing nozzle fixedly connected to the top wall of the drying box body, the liquid storage tank is connected to the centrifugal atomizing nozzle through a pipeline, the top wall of the drying box body is rotatably connected to a rotating drum, the centrifugal atomizing nozzle is coaxial with the rotating drum and is arranged through the rotating drum, the bottom wall of the rotating drum is provided with an air blowing port, the air blowing port is located on the periphery of the centrifugal atomizing nozzle, the top wall of the drying box body is fixedly connected to a rotating motor, the output shaft of the rotating motor is fixedly connected to a rotating gear, and the periphery of the rotating drum and the rotating gear are provided with matching rotating tooth grooves; the outer wall of the drying box body is fixedly connected to a blower, the blower is connected to a hot air blower, and the hot air blower is connected to the inside of the rotating drum through a pipeline.
[0006] Preferably, the second drying assembly includes a first box body, a second box body is arranged in the first box body, a connecting tube is fixedly connected to the bottom wall of the second box body, the bottom wall of the connecting tube is rotatably matched with the first box body, the bottom of the first box body is fixedly connected to a driving motor, the output shaft of the driving motor is fixedly connected to a driving gear, the outer wall of the connecting tube is provided with a matching tooth groove matched with the driving gear, an electric heating tube is installed in the first box body, and two fixing plates are connected to the fixed wheel on the first box body, the two fixing plates are symmetrically arranged, and a cover plate is rotatably connected to one side of the fixing plate close to the middle of the first box body, and a telescopic electric cylinder is rotatably connected between the cover plate and the fixing plate; the powder outlet pipe is located at the bottom wall of the second box body and is connected to the second box body, and a through hole is provided on the bottom wall of the first box body corresponding to the powder outlet pipe, the powder outlet pipe passes through the through hole and a gap is left between the inner wall of the through hole.
[0007] Preferably, the conveying assembly includes a conveying pipe, the conveying pipe includes a vertical section and an inclined section that are connected to each other, the bottom of the powder outlet pipe is located in the vertical section of the conveying pipe and is arranged in sliding contact with the conveying pipe, and the inclined section of the conveying pipe passes through the side wall of the drying box body and is arranged corresponding to the packaging machine.
[0008] Preferably, a plurality of mounting plates are fixedly connected between the bottom wall of the first box body and the bottom wall of the drying box body, and receiving grooves are provided on the mounting plates corresponding to the conveying pipe. The inclined section of the conveying pipe is located in the receiving groove, and lifting blocks are fixedly connected to the upper and lower sides thereof, respectively. A limiting column is fixedly connected to the side of the lifting block away from the conveying pipe. The receiving groove and the limiting column have limiting grooves correspondingly provided, and the limiting column is slidably located in the limiting groove. A compression spring is fixedly connected between the lifting block and the inner wall of the receiving groove, and the compression spring is located around the limiting column. A polarization component is installed on the inclined section of the conveying pipe.
[0009] Preferably, the polarization component includes a mounting block fixedly connected to the inclined section of the conveying pipe, the mounting block is rotatably connected to a rotating sleeve, a counterweight is fixedly connected to the circumferential side of the rotating sleeve, a polarization motor is fixedly connected to the mounting block, a transmission gear is fixedly connected to the output shaft of the polarization motor, and a transmission tooth groove meshing with the transmission gear is provided on the circumferential side of the rotating sleeve; a through groove for the conveying pipe to move up and down is provided on the side wall of the drying box body.
[0010] Preferably, a plurality of rollers are installed on the inner wall of the first box body, and the plurality of rollers are horizontally arranged at the circumference of the second box body, and the rollers are arranged in contact with the second box body.
[0011] The present invention discloses the following technical effects: the present invention integrates an automatic dispensing machine, a decoction machine, a concentrator, a dryer and a sub-packaging machine into a set of integrated machines, does not require an independent factory building, reduces the floor space, and the interconnection between the units improves the work efficiency; the dryer of the present invention performs multiple drying through the first drying component and the second drying component to ensure the drying effect, and the dried medicine powder can automatically enter the sub-packaging machine for sub-packaging, which is convenient and fast. The present invention has a simple structure and is easy to operate, can meet the integrated process from picking medicine to powder making, and can ensure the drying effect of the medicine powder. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.
[0013] Figure 1 This is a schematic diagram of the structure of a small all-in-one machine for preparing and powdering Chinese medicine according to the present invention;
[0014] Figure 2 It is a structural schematic diagram of the dryer of the present invention;
[0015] Figure 3 for Figure 2 A partial enlarged view of middle A;
[0016] Among them: 1. Automatic dispensing machine; 2. Decoction machine; 3. Concentrator; 4. Dryer; 5. Packing machine; 6. Drying box body; 7. Liquid storage tank; 8. Guide plate; 9. Powder outlet pipe; 10. Centrifugal atomizing nozzle; 11. Rotating drum; 12. Air outlet; 13. Rotating motor; 14. Rotating gear; 15. Blower; 16. Hot air blower; 17. First box body; 18. Second box body; 19. Connecting tube; 20. Driving motor; 21. Driving gear; 22. Fixed plate; 23. Cover plate; 24. Telescopic electric cylinder; 25. Through hole; 26. Conveying pipeline; 27. Mounting plate; 28. Accommodating groove; 29. Lifting block; 30. Limiting column; 31. Limiting groove; 32. Compression spring; 33. Mounting block; 34. Rotating sleeve; 35. Counterweight; 36. Polarization motor; 37. Transmission gear; 38. Through groove; 39. Roller. DETAILED DESCRIPTION
[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0018] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.
[0019] Reference Figure 1-3 The present invention provides a small all-in-one machine for preparing Chinese medicine powder, comprising an automatic dispensing machine 1, a decoction machine 2, a concentrator 3, a dryer 4 and a filling machine 5 which are arranged in sequence; the dryer 4 comprises a drying box body 6, a first drying component is installed on the top of the drying box body 6, a liquid storage tank 7 is fixedly connected to the outer wall of the drying box body 6, and the liquid storage tank 7 is connected to the first drying component; a guide plate 8 and a second drying component are fixedly connected in the drying box body 6, the guide plate 8 is located between the first drying component and the second drying component and is arranged corresponding to the second drying component, a powder outlet pipe 9 is arranged at the bottom of the second drying component, a conveying component is arranged at the bottom of the drying box body 6, one end of the conveying component is connected to the powder outlet pipe 9, and the other end of the conveying component is arranged corresponding to the top of the filling machine 5. The automatic dispensing machine 1, the decoction machine 2, the concentrator 3, the dryer 4 and the packaging machine 5 are integrated into a set of all-in-one machines, which do not require independent factory buildings, reduce the floor space, and the interconnection between the units improves the work efficiency; the dryer 4 of the present invention performs multiple drying through the first drying component and the second drying component to ensure the drying effect, and the dried medicine powder can automatically enter the packaging machine 5 for packaging, which is convenient and fast.
[0020] A further optimized solution is as follows: the first drying component includes a centrifugal atomizing nozzle 10 fixedly connected to the top wall of the drying box body 6, the liquid storage tank 7 is connected to the centrifugal atomizing nozzle 10 through a pipeline, the top wall of the drying box body 6 is rotatably connected to a rotating drum 11, the centrifugal atomizing nozzle 10 is coaxial with the rotating drum 11 and is arranged through the rotating drum 11, a blowing port 12 is provided on the bottom wall of the rotating drum 11, and the blowing port 12 is located on the side of the centrifugal atomizing nozzle 10, a rotating motor 13 is fixedly connected to the top wall of the drying box body 6, a rotating gear 14 is fixedly connected to the output shaft of the rotating motor 13, and corresponding rotating tooth grooves are provided on the side of the rotating drum 11 corresponding to the rotating gear 14; a blower 15 is fixedly connected to the outer wall of the drying box body 6, the blower 15 is connected to a hot air blower 16, and the hot air blower 16 is connected to the inside of the rotating drum 11 through a pipeline. The liquid medicine is sprayed out through the centrifugal atomizing nozzle 10, and then the rotating drum 11 is driven to rotate by the rotating motor 13. At the same time, the blower 15 and the hot air blower 16 blow hot air into the rotating drum 11, and the hot air is sprayed out evenly to dry the sprayed liquid medicine.
[0021] Further optimization scheme, the second drying component includes a first box body 17, a second box body 18 is arranged in the first box body 17, a connecting tube 19 is fixedly connected to the bottom wall of the second box body 18, the bottom wall of the connecting tube 19 is rotatably matched with the first box body 17, a driving motor 20 is fixedly connected to the bottom of the first box body 17, the output shaft of the driving motor 20 is fixedly connected to the driving gear 21, the outer wall of the connecting tube 19 is provided with a matching tooth groove adapted to the driving gear 21, and an electric heating pipe is installed in the first box body 17. The fixed wheel on the first box body 17 is connected to two fixed plates 22, and the two fixed plates 22 are symmetrically arranged. The fixed plate 22 is rotatably connected to a cover plate 23 on one side close to the middle of the first box body 17, and a telescopic electric cylinder 24 is rotatably connected between the cover plate 23 and the fixed plate 22; the powder outlet pipe 9 is located on the bottom wall of the second box body 18 and is connected to the second box body 18. The bottom wall of the first box body 17 and the powder outlet pipe 9 are provided with through holes 25 corresponding to each other, and the powder outlet pipe 9 passes through the through holes 25 and a gap is left between the powder outlet pipe 9 and the inner wall of the through holes 25. The connecting cylinder 19 is driven to rotate by the driving motor 20, and then the second box body 18 is driven to rotate, and the Chinese medicine in the second box body 18 is driven to move by centrifugation. At the same time, the electric heating pipe on the first box body 17 heats it, and further dries it to ensure the drying effect. In addition, the side wall of the drying box body 6 is fixedly connected with an air vent to discharge excess steam.
[0022] A further optimized solution is that the conveying assembly includes a conveying pipe 26, and the conveying pipe 26 includes a vertical section and an inclined section that are connected to each other. The bottom of the powder outlet pipe 9 is located in the vertical section of the conveying pipe 26 and is arranged in sliding contact with the conveying pipe 26. The inclined section of the conveying pipe 26 passes through the side wall of the drying box body 6 and is arranged corresponding to the filling machine 5.
[0023] Further optimization scheme, a plurality of mounting plates 27 are fixedly connected between the bottom wall of the first box body 17 and the bottom wall of the drying box body 6, and a receiving groove 28 is provided on the mounting plate 27 and the conveying pipe 26, and the inclined section of the conveying pipe 26 is located in the receiving groove 28, and the upper and lower sides thereof are respectively fixedly connected with lifting blocks 29, and the lifting block 29 is fixedly connected with a limiting column 30 on the side away from the conveying pipe 26, and the receiving groove 28 and the limiting column 30 are provided with a limiting groove 31 correspondingly, and the limiting column 30 is slidably located in the limiting groove 31, and a compression spring 32 is fixedly connected between the lifting block 29 and the inner wall of the receiving groove 28, and the compression spring 32 is located around the limiting column 30; a polarization component is installed on the inclined section of the conveying pipe 26. The conveying pipe 26 is driven to shake by the polarization component, and the lifting block 29 is driven to move up and down along the direction of the limiting column 30 by the compression spring 32, thereby driving the conveying pipe 26 to shake up and down, and limiting the movement direction of the conveying pipe 26.
[0024] Further optimized solution, the polarization assembly includes a mounting block 33 fixedly connected to the inclined section of the conveying pipe 26, a rotating sleeve 34 is rotatably connected to the mounting block 33, a counterweight 35 is fixedly connected to the peripheral side of the rotating sleeve 34, a polarization motor 36 is fixedly connected to the mounting block 33, a transmission gear 37 is fixedly connected to the output shaft of the polarization motor 36, and a transmission tooth groove meshing with the transmission gear 37 is provided on the peripheral side of the rotating sleeve 34; a through groove 38 for the conveying pipe 26 to move up and down is provided on the side wall of the drying box body 6. The polarization motor 36 drives the transmission gear 37 to rotate, and then drives the rotating sleeve 34 to rotate. During the rotation of the rotating sleeve 34, the counterweight 35 is driven to rotate, thereby generating shaking, driving the conveying pipe 26 to vibrate up and down, which is convenient for conveying the powder.
[0025] In a further optimized solution, a plurality of rollers 39 are installed on the inner wall of the first box 17, and the plurality of rollers 39 are horizontally arranged around the second box 18, and the rollers 39 are arranged in contact with the second box 18. The top side wall of the second box 18 is limited so that it can stably rotate in the first box 17.
[0026] To further optimize the solution, a tilted heating plate is fixedly connected to the drying box body 6, and the heating plate is located between the centrifugal atomizing nozzle 10 and the guide plate 8, which can heat the fallen Chinese medicine to ensure the drying effect.
[0027] To further optimize the solution, the automatic dispensing machine 1 can automatically dispense medicine, generally for seven days (one course of treatment), and a filter is installed in the decoction machine to filter out the medicine residue. The packing machine packs the powder into strip-shaped medicine bags, which are easy to carry and brew. The disadvantage of the inconvenience of carrying liquid bags is avoided.
[0028] According to a further optimization scheme, the small all-in-one machine for preparing and powdering traditional Chinese medicine of the present invention occupies a small area and can be placed in a pharmacy, with an area of 4m*1m*1-2m.
[0029] The working process of the present invention is as follows: the automatic dispensing machine 1 is a prior art, which can automatically pick up medicines according to the input prescription, and then put them into the decoction machine 2 for decoction through transportation and gauze packaging. After the decoction is completed, the liquid medicine is concentrated by the concentrator 3 and then transported to the dryer 4 for drying. During drying, the rotating motor 13 is started, and the rotating motor 13 drives the rotating gear 14 to rotate, thereby driving the rotating drum 11 to rotate. The blower 15 and the hot air blower 16 are used to transport hot air into the rotating drum 11, and the liquid medicine passing through the centrifugal atomizing nozzle 10 is heated to become powder, and then the liquid medicine after preliminary drying is dried. The medicine moves into the second box 18, and the driving motor 20 drives the driving gear 21 to rotate, thereby driving the second box 18 to rotate, causing the internal Chinese medicine to be centrifuged, and then heated in the first box 17 to further dry the Chinese medicine to make it fully dry, and then open the valve in the second box 18 to allow the dried medicine powder to fall into the conveying pipe 26, and the polarization motor 36 drives the transmission gear 37 to rotate, thereby driving the rotating sleeve 34 to rotate, and the counterweight block 35 drives the conveying pipe 26 to vibrate up and down, so that the medicine powder can be conveyed to the medicine inlet of the filling machine 5 to complete the filling.
[0030] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0031] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.
Claims
1. A small all-in-one machine for preparing Chinese medicine powder, characterized by: The invention comprises an automatic dispensing machine (1), a decoction machine (2), a concentrator (3), a dryer (4) and a packaging machine (5) which are arranged in sequence; the dryer (4) comprises a drying box body (6), a first drying component is installed on the top of the drying box body (6), a liquid storage tank (7) is fixedly connected to the outer wall of the drying box body (6), and the liquid storage tank (7) is connected to the first drying component; a guide plate (8) and a second drying component are fixedly connected inside the drying box body (6), the guide plate (8) is located between the first drying component and the second drying component and is arranged corresponding to the second drying component, a powder outlet pipe (9) is arranged at the bottom of the second drying component, and a conveying component is arranged at the bottom of the drying box body (6), one end of the conveying component is connected to the powder outlet pipe (9), and the other end of the conveying component is arranged corresponding to the top of the packaging machine (5).
2. The small all-in-one machine for preparing Chinese medicine powder according to claim 1, characterized in that: The first drying component comprises a centrifugal atomizing nozzle (10) fixedly connected to the top wall of the drying box body (6); the liquid storage tank (7) is connected to the centrifugal atomizing nozzle (10) through a pipeline; the top wall of the drying box body (6) is rotatably connected to a rotating drum (11); the centrifugal atomizing nozzle (10) is coaxial with the rotating drum (11) and is arranged to penetrate the rotating drum (11); the bottom wall of the rotating drum (11) is provided with an air blowing port (12); the air blowing port (12) is located at the centrifugal atomizing nozzle A rotating motor (13) is fixedly connected to the top wall of the drying box body (6) on the peripheral side of the nozzle (10); a rotating gear (14) is fixedly connected to the output shaft of the rotating motor (13); and matching rotating tooth grooves are provided on the peripheral side of the rotating drum (11) and corresponding to the rotating gear (14); a blower (15) is fixedly connected to the outer wall of the drying box body (6); the blower (15) is connected to a hot air blower (16); and the hot air blower (16) is connected to the inside of the rotating drum (11) through a pipeline.
3. The small all-in-one machine for preparing Chinese medicine powder according to claim 1, characterized in that: The second drying assembly comprises a first box body (17), a second box body (18) is arranged in the first box body (17), a connecting tube (19) is fixedly connected to the bottom wall of the second box body (18), the bottom wall of the connecting tube (19) is rotatably matched with the first box body (17), a driving motor (20) is fixedly connected to the bottom of the first box body (17), the output shaft of the driving motor (20) is fixedly connected to a driving gear (21), the outer wall of the connecting tube (19) is provided with a matching tooth groove matched with the driving gear (21), an electric heating pipe is installed in the first box body (17), and the first box body (17) is fixedly connected to the bottom wall of the first box body (17). The fixed wheel is connected to two fixed plates (22), the two fixed plates (22) are symmetrically arranged, and a cover plate (23) is rotatably connected to one side of the fixed plate (22) close to the middle of the first box body (17), and a telescopic electric cylinder (24) is rotatably connected between the cover plate (23) and the fixed plate (22); the powder outlet pipe (9) is located on the bottom wall of the second box body (18) and is connected to the second box body (18), and a through hole (25) is opened corresponding to the bottom wall of the first box body (17) and the powder outlet pipe (9), and the powder outlet pipe (9) passes through the through hole (25) and a gap is left between the powder outlet pipe (9) and the inner wall of the through hole (25).
4. The small all-in-one machine for preparing Chinese medicine powder according to claim 3, characterized in that: The conveying assembly comprises a conveying pipeline (26), wherein the conveying pipeline (26) comprises a vertical section and an inclined section which are connected to each other, the bottom of the powder outlet pipe (9) is located in the vertical section of the conveying pipeline (26) and is arranged in sliding contact with the conveying pipeline (26), and the inclined section of the conveying pipeline (26) passes through the side wall of the drying box body (6) and is arranged corresponding to the dispensing machine (5).
5. The small all-in-one machine for preparing Chinese medicine powder according to claim 4, characterized in that: A plurality of mounting plates (27) are fixedly connected between the bottom wall of the first box body (17) and the bottom wall of the drying box body (6); a receiving groove (28) is provided on the mounting plate (27) and the conveying pipe (26) correspondingly; a lifting block (29) is fixedly connected to the upper and lower sides of the inclined section of the conveying pipe (26) located in the receiving groove (28); a limiting column (30) is fixedly connected to the side of the lifting block (29) away from the conveying pipe (26); a limiting groove (31) is provided between the receiving groove (28) and the limiting column (30); the limiting column (30) is slidably located in the limiting groove (31); a compression spring (32) is fixedly connected between the lifting block (29) and the inner wall of the receiving groove (28); the compression spring (32) is located around the limiting column (30); a polarization component is installed on the inclined section of the conveying pipe (26).
6. The small all-in-one machine for preparing Chinese medicine powder according to claim 5, characterized in that: The polarization component comprises a mounting block (33) fixedly connected to the inclined section of the conveying pipe (26); a rotating sleeve (34) is rotatably connected to the mounting block (33); a counterweight (35) is fixedly connected to the peripheral side of the rotating sleeve (34); a polarization motor (36) is fixedly connected to the mounting block (33); a transmission gear (37) is fixedly connected to the output shaft of the polarization motor (36); a transmission tooth groove meshing with the transmission gear (37) is provided on the peripheral side of the rotating sleeve (34); and a through groove (38) for the conveying pipe (26) to move up and down is provided on the side wall of the drying box body (6).
7. The small all-in-one machine for preparing Chinese medicine powder according to claim 3, characterized in that: A plurality of rollers (39) are installed on the inner wall of the first box body (17), and the plurality of rollers (39) are horizontally arranged on the peripheral side of the second box body (18), and the rollers (39) are arranged in contact with the second box body (18).