Energy-saving sesame processing and feeding equipment based on intelligent speed regulation

Abstract

The invention relates to the technical field of sesame processing and feeding, and provides energy-saving sesame processing and feeding equipment based on intelligent speed regulation, which comprises a bottom plate, support frames are fixedly connected to the upper sides of the front and rear ends of the bottom plate, a hopper is fixedly connected to the tops of the support frames, a first cover plate is fixedly connected to the top of the hopper, and a second cover plate is fixedly connected to the top of the first cover plate. A screening barrel is fixedly connected to the middle of the first cover plate, a screening assembly is installed in the screening barrel, a connector is fixedly connected to the bottom of the hopper, and a hose is fixedly connected to the bottom of the connector. An electric push rod pushes a movable plate to move leftwards, so that an adjusting pipe is pushed to move leftwards outside a conveying pipe, the length of the conveying pipe is increased, and the conveying distance is increased; and an electric sliding rail is arranged to drive a sliding block to move leftwards, so that a pushing rod pushes a conveying pipe and an adjusting pipe to rotate upwards, the angle of the conveying pipe is adjusted, the conveying pipe is used for feeding high-altitude equipment, and the practicability of the device is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of sesame processing and feeding, and specifically relates to an energy-saving sesame processing feeding device based on intelligent speed regulation. Background Art

[0002] With the rapid development of the food industry, sesame, as an important oil crop and food raw material, has an increasing demand for processing. Sesame processing is a process of processing sesame raw materials through a series of technological processes to produce edible oil, sesame paste, sesame powder or other foods. In the sesame processing process, the feeding link is a key step to ensure the smooth operation of the entire production line.

[0003] Although the existing screw feeding devices for sesame processing achieve precise feeding and energy consumption optimization through the integration of sensor technology, automatic control and intelligent algorithms, they lack an angle adjustment function and are limited by the length of the spiral blades, with a limited conveying distance and no adjustment available. This makes it necessary to replace the entire feeding system when docking different processing equipment or adjusting the production line layout, resulting in poor flexibility in use. This not only increases costs but also reduces production efficiency. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the present invention provides an energy-saving sesame processing feeding device based on intelligent speed regulation, which solves the problems that feeding devices often lack an angle adjustment function and have a limited conveying distance and cannot be adjusted.

[0005] To achieve the above objectives, the present invention is realized through the following technical solutions: An energy-saving sesame processing feeding device based on intelligent speed regulation, comprising: a bottom plate, on the upper sides of the front and rear ends of the bottom plate, support frames are fixedly connected; on the tops of the support frames, a hopper is fixedly connected together; on the top of the hopper, a first cover plate is fixedly connected; in the middle of the first cover plate, a screening barrel is fixedly connected; inside the screening barrel, a screening component is installed; at the bottom of the hopper, a connecting head is fixedly connected; at the bottom of the connecting head, a hose is fixedly connected; at the bottom of the hose, a housing is fixedly connected; inside the housing, a conveying pipe is fixedly connected; on the outside of the left end of the conveying pipe, an adjusting pipe that can move left and right is arranged; on the right end of the adjusting pipe, a corrugated pipe is arranged; on the lower left side of the left end of the adjusting pipe, a discharge port is arranged; inside the conveying pipe, a rotating shaft is arranged; the right end of the rotating shaft is rotatably connected inside the housing; on the outside of the rotating shaft, spiral blades are fixedly connected; the outer wall of the spiral blades is closely fitted with the inner wall of the conveying pipe; on the right end of the housing, a motor is fixedly connected; the driving end of the motor is fixedly connected to the right end of the rotating shaft; on the outside of the adjusting pipe, a pushing component is arranged.

[0006] Preferably, columns are fixedly connected to both the front and rear sides of the housing. The ends of the columns are rotatably connected to fixing plates. The bottoms of the fixing plates are fixedly connected to the upper side of the bottom plate, and the tops of the fixing plates are fixedly connected to the outside of the hopper.

[0007] Preferably, the pushing assembly includes a movable plate movably arranged in the middle of the bottom plate. An electric push rod is arranged in the middle of the movable plate. The right end of the electric push rod is fixedly connected to the inside of the bottom plate. The driving end of the electric push rod is fixedly connected to a first connecting block. The outer wall of the first connecting block is fixedly connected to the left end of the movable plate. Limiting rods are fixedly connected to both the front and rear sides of the electric push rod inside the bottom plate. The left ends of the limiting rods pass through the inside of the movable plate.

[0008] Preferably, the pushing assembly further includes an electric slide rail installed on the upper side of the movable plate. A slider that moves left and right is arranged outside the electric slide rail. The left end of the slider is rotatably connected to a pushing rod. The end of the pushing rod is rotatably connected to a second connecting block. The upper side of the second connecting block is fixedly connected to a mounting block. The inner wall of the mounting block is fixedly connected to the outside of the right end of the adjusting pipe.

[0009] Preferably, a fixing ring is fixedly connected to the outside of the conveying pipe. A fixing rod is fixedly connected to the left side of the fixing ring. The left ends of the fixing rods respectively penetrate through the four corners of the mounting block and are fixedly connected to a ring body. The lower end of the ring body is rotatably connected to a rotating ring.

[0010] Preferably, a cushion block for cooperating with the rotating ring is fixedly connected to the lower left side of the left end of the adjusting pipe.

[0011] Preferably, two rotatably connected rotating plates are arranged on both the front and rear sides of the corrugated pipe. The opposite ends of the rotating plates are respectively fixedly connected to the outside of the adjusting pipe.

[0012] Preferably, the screening assembly includes a cylinder arranged inside a screening barrel. A spiral screening plate is fixedly connected to the outside of the cylinder. A spiral guide plate is fixedly connected to the outside of the cylinder below the spiral screening plate. The outer walls of the spiral guide plate and the spiral screening plate are both in close fit with the inner wall of the screening barrel. The upper ends of the spiral screening plate and the spiral guide plate are jointly fixedly connected to a second partition plate. The lower ends of the spiral screening plate and the spiral guide plate are jointly fixedly connected to a first partition plate. A discharge port is arranged at the lower right side of the screening barrel.

[0013] Preferably, a second cover plate is fixedly connected to the top of the screening barrel. A vibrator is fixedly connected to the lower side of the second cover plate. The driving end of the vibrator is fixedly connected to the upper end inside the cylinder.

[0014] Preferably, a first roller is installed on the lower left side of the left end of the movable plate, and a second roller is installed on the lower side of the bottom plate.

[0015] Working principle: The sesame raw materials are put into the inside of the screening bucket through the opening provided on the second cover plate. The entering sesame falls on the spiral screening plate. The set vibrator is started to drive the cylinder and the spiral screening plate to vibrate. The sesame is screened by the spiral screening plate, so that the sesame passes through the spiral screening plate, falls on the spiral guide plate below, and moves downward through the spiral guide plate and falls into the hopper. The impurities remain on the spiral screening plate and move downward, and then are discharged from the discharge port.

[0016] The screened sesame falls into the hopper and is injected into the conveying pipe through the connector and the hose. The set motor is started to drive the rotating shaft and the spiral blade to rotate. The rotating spiral blade pushes the sesame to move leftward inside the conveying pipe and the adjusting pipe, and then flows out from the discharge port and enters the processing equipment.

[0017] The set electric push rod can be started to push the movable plate to move leftward, so as to push the adjusting pipe to move leftward outside the conveying pipe through the push rod and the mounting block, increasing the conveying distance. When the mounting block drives the adjusting pipe to move leftward, the mounting block moves leftward outside the fixed rod, so that the ring body moves towards the right end of the adjusting pipe and gradually approaches the corrugated pipe. As the ring body approaches the corrugated pipe, its position away from the cushion block is changed. At this time, the left end of the adjusting pipe lacks the lifting force and rotates downward and obliquely with the rotation point of the rotating plate as the axis. At this time, the sesame conveyed by the spiral blade flows downward along the downward inclined adjusting pipe and is discharged from the discharge port and enters the processing equipment; when the adjusting pipe moves to the left end of the conveying pipe and cannot move leftward continuously, the set electric slide rail is started to drive the slider to slide leftward, so as to drive the push rod to move, and push the conveying pipe and the adjusting pipe to rotate upward to adjust the inclination angle, so as to be used for feeding operations at different heights. The set first roller can be used for the left end of the extended movable plate to contact the ground for support to improve stability. The set second roller can be used for the moving device.

[0018] The present invention provides an energy-saving sesame processing feeding device based on intelligent speed regulation. It has the following

[0019] Beneficial effects:

[0020] 1. In the present invention, the set electric push rod is used to push the movable plate to move leftward, so as to push the adjusting pipe to move leftward outside the conveying pipe, thereby increasing the length of the conveying pipeline and increasing the conveying distance; the set electric slide rail is used to drive the slider to move leftward, so as to push the conveying pipe and the adjusting pipe to rotate upward through the push rod, thereby adjusting the angle of the conveying pipeline and being used for feeding high-position equipment, improving the practicability of the device.

[0021] 2. In the present invention, the vibrating machine drives the cylinder and the spiral screening plate to vibrate. The spiral screening plate screens the input sesame raw materials, so that the impurities remain on the upper side of the spiral screening plate, and the sesame flows into the hopper through the spiral guide plate, thereby preventing the impurities from affecting the processing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a perspective view of the present invention;

[0023] Figure 2 is a schematic diagram of the screening barrel of the present invention;

[0024] Figure 3 is a schematic diagram of the cylinder of the present invention;

[0025] Figure 4 is a schematic diagram of the adjusting cylinder of the present invention;

[0026] Figure 5 is a schematic diagram of the rotating plate of the present invention;

[0027] Figure 6 is a schematic diagram of the spiral blade of the present invention;

[0028] Figure 7 is a schematic diagram of the movable plate of the present invention;

[0029] Figure 8 is a schematic diagram of the push rod of the present invention.

[0030] Among them, 1. bottom plate; 2. support frame; 3. hopper; 4. first cover plate; 5. screening barrel; 6. connector; 7. hose; 8. housing; 9. conveying pipe; 10. adjusting pipe; 11. bellows; 12. discharge port; 13. rotating shaft; 14. spiral blade; 15. motor; 16. movable plate; 17. electric push rod; 18. limiting rod; 19. first connecting block; 20. electric slide rail; 21. slider; 22. push rod; 23. second connecting block; 24. mounting block; 25. first roller; 26. second roller; 27. fixing ring; 28. fixing rod; 29. ring body; 30. cushion block; 31. rotating ring; 32. rotating plate; 33. column; 34. fixing plate; 35. cylinder; 36. spiral screening plate; 37. spiral guide plate; 38. first partition plate; 39. second partition plate; 40. second cover plate; 41. vibrating machine; 42. discharge opening. DETAILED DESCRIPTION OF THE INVENTION

[0031] 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. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] Embodiment:

[0033] Please refer to the attached Figure 1 - attached Figure 8 , the embodiment of the present invention provides an energy-saving sesame processing feeding device based on intelligent speed regulation, including: a bottom plate 1, a second roller 26 is installed on the lower side of the bottom plate 1, support frames 2 are fixedly connected to the upper sides of the front and rear ends of the bottom plate 1, a hopper 3 is fixedly connected to the tops of the support frames 2 together, a connector 6 is fixedly connected to the bottom of the hopper 3, a hose 7 is fixedly connected to the bottom of the connector 6, a housing 8 is fixedly connected to the bottom of the hose 7, columns 33 are fixedly connected to the front and rear sides of the housing 8, fixing plates 34 are rotatably connected to the ends of the columns 33, the bottoms of the fixing plates 34 are fixedly connected to the upper side of the bottom plate 1, and the tops of the fixing plates 34 are fixedly connected to the outside of the hopper 3. A conveying pipe 9 is fixedly connected inside the housing 8. An adjusting pipe 10 that moves left and right is arranged outside the left end of the conveying pipe 9. A corrugated pipe 11 is arranged at the right end of the adjusting pipe 10. An outlet 12 is arranged on the lower left side of the left end of the adjusting pipe 10. Two rotatably connected rotating plates 32 are arranged on the front and rear sides of the corrugated pipe 11. The opposite ends of the rotating plates 32 are respectively fixedly connected to the outside of the adjusting pipe 10. A rotating shaft 13 is arranged inside the conveying pipe 9. The right end of the rotating shaft 13 is rotatably connected inside the housing 8. A spiral blade 14 is fixedly connected to the outside of the rotating shaft 13. The outer wall of the spiral blade 14 is in close fit with the inner wall of the conveying pipe 9. A motor 15 is fixedly connected to the right end of the housing 8. The driving end of the motor 15 is fixedly connected to the right end of the rotating shaft 13. A fixing ring 27 is fixedly connected to the outside of the conveying pipe 9. A fixing rod 28 is fixedly connected to the left side of the fixing ring 27. The left end of the fixing rod 28 respectively penetrates through the four corners of the mounting block 24 and is fixedly connected to a ring body 29. A rotating ring 31 is rotatably connected to the lower end of the ring body 29. A cushion block 30 for cooperating with the rotating ring 31 is fixedly connected to the lower left side of the left end of the adjusting pipe 10.

[0034] The lower end of the hose 7 penetrates through the housing 8 and is connected to the upper side of the right end of the conveying pipe 9. Sesame falls into the hopper 3 and is injected into the conveying pipe 9 through the connector 6 and the hose 7. The motor 15 is started to drive the rotating shaft 13 and the spiral blade 14 to rotate. The rotating spiral blade 14 pushes the sesame to move leftward inside the conveying pipe 9 and the adjusting pipe 10, and then flows out from the discharge port 12 and enters the processing equipment. The provided conveying pipe 9 can be rotated upward through the cylinder 33. When the conveying pipe 9 and the adjusting pipe 10 are rotated upward, the inclination angle can be adjusted, so as to feed materials to high-position equipment, which is convenient for processing. Thus, it can be adjusted according to requirements, thereby improving the applicability of the device. The provided adjusting pipe 10 can move leftward outside the conveying pipe 9 to increase the length of the conveying pipeline, thereby increasing the conveying distance. The left end of the adjusting pipe 10 can be rotated downward through the rotating plate 32. When the adjusting pipe 10 moves leftward, the mounting block 24 moves leftward outside the fixed rod 28, and the second partition 39 moves rightward relative to the adjusting pipe 10 and approaches the corrugated pipe 11. The rotating ring 31 on the lower side of the ring body 29 contacts the cushion block 30 and moves leftward, gradually approaching the inclined surface at the right end of the cushion block 30. When the rotating ring 31 contacts the inclined surface provided on the cushion block 30, the left end of the adjusting pipe 10 gradually rotates downward. The closer the provided ring body 29 is to the corrugated pipe 11, the greater the downward inclination angle of the adjusting pipe 10, and it can be adjusted according to requirements.

[0035] A movable plate 16 is movably arranged in the middle of the bottom plate 1. A first roller 25 is installed on the lower side of the left end of the movable plate 16. An electric push rod 17 is arranged in the middle of the movable plate 16. The right end of the electric push rod 17 is fixedly connected to the inside of the bottom plate 1. The driving end of the electric push rod 17 is fixedly connected to a first connecting block 19. The outer wall of the first connecting block 19 is fixedly connected to the left end of the movable plate 16. Limit rods 18 are fixedly connected to the inside of the bottom plate 1 on both the front and rear sides of the electric push rod 17. The left ends of the limit rods 18 penetrate through the inside of the movable plate 16. An electric slide rail 20 is installed on the upper side of the movable plate 16. A left-right movable slider 21 is arranged outside the electric slide rail 20. The left end of the slider 21 is rotatably connected to a push rod 22. The end of the push rod 22 is rotatably connected to a second connecting block 23. The upper side of the second connecting block 23 is fixedly connected to a mounting block 24. The inner wall of the mounting block 24 is fixedly connected to the outside of the right end of the adjusting pipe 10.

[0036] The electric push rod 17 set for startup can push the movable plate 16 to move leftward, thereby pushing the adjusting pipe 10 to move leftward outside the conveying pipe 9 through the push rod 22 and the mounting block 24, increasing the conveying distance. When the mounting block 24 drives the adjusting pipe 10 to move leftward, the mounting block 24 moves leftward outside the fixed rod 28, so that the ring body 29 moves towards the right end of the adjusting pipe 10 and gradually approaches the corrugated pipe 11. As the ring body 29 approaches the corrugated pipe 11, it moves away from the position of the cushion block 30. At this time, the left end of the adjusting pipe 10 lacks the lifting force and rotates downward and obliquely with the rotation point of the rotating plate 32 as the axis. At this time, the sesame conveyed by the spiral blade 14 flows downward along the downwardly inclined adjusting pipe 10 and is discharged from the discharge port 12 into the processing equipment; when the adjusting pipe 10 moves to the left end of the conveying pipe 9 and cannot move leftward continuously, the electric slide rail 20 set for startup drives the slider 21 to slide leftward, thereby driving the push rod 22 to move, pushing the conveying pipe 9 and the adjusting pipe 10 to rotate upward to adjust the inclination angle, so as to be used for feeding operations at different heights. The first roller 25 set can be used for the left end of the extended movable plate 16 to contact the ground for support to improve stability. The second roller 26 set can be used for the moving device.

[0037] A first cover plate 4 is fixedly connected to the top of the hopper 3. A screening barrel 5 is fixedly connected to the middle of the first cover plate 4. A cylindrical barrel 35 is arranged inside the screening barrel 5. A spiral screening plate 36 is fixedly connected to the outside of the cylindrical barrel 35. A spiral guide plate 37 is fixedly connected to the lower side of the spiral screening plate 36 on the outside of the cylindrical barrel 35. The outer walls of the spiral guide plate 37 and the spiral screening plate 36 are closely fitted with the inner wall of the screening barrel 5. A second partition plate 39 is fixedly connected to the upper ends of the spiral screening plate 36 and the spiral guide plate 37 together. A first partition plate 38 is fixedly connected to the lower ends of the spiral screening plate 36 and the spiral guide plate 37 together. A discharge port 42 is arranged at the lower right side of the screening barrel 5. A second cover plate 40 is fixedly connected to the top of the screening barrel 5. A vibrator 41 is fixedly connected to the lower side of the second cover plate 40. The driving end of the vibrator 41 is fixedly connected to the upper end inside the cylindrical barrel 35.

[0038] Sesame raw materials are put into the screening barrel 5 from the top. The vibrator 41 drives the cylindrical barrel 35 and the spiral screening plate 36 to vibrate at high frequency. Sesame grains fall through the sieve holes of the spiral screening plate 36 into the spiral guide plate 37 below, and impurities slide down along the sieve plate in a spiral shape to the discharge port 42 for discharge. The spiral guide plate 37 conveys the sesame to the hopper 3 to avoid blockage; thus, it replaces manual screening of sesame, improves work efficiency, removes impurities in the sesame before processing, improves processing quality, and the first partition plate 38 set is used to guide impurities to the discharge port 42.

[0039] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art will appreciate 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. An energy-saving sesame processing feeding equipment based on intelligent speed regulation, characterized in that: include: A bottom plate (1), the upper sides of both front and rear ends of the bottom plate (1) are fixedly connected to a support frame (2), the top of the support frame (2) is commonly fixedly connected to a hopper (3), the top of the hopper (3) is fixedly connected to a first cover plate (4), the middle of the first cover plate (4) is fixedly connected to a screening barrel (5), a screening assembly is installed inside the screening barrel (5), the bottom of the hopper (3) is fixedly connected to a connector (6), the bottom of the connector (6) is fixedly connected to a hose (7), the bottom of the hose (7) is fixedly connected to a shell (8), the inside of the shell (8) is fixedly connected to a delivery pipe (9), and the left end of the delivery pipe (9) is provided with a A left-right movable regulating tube (10), the right end of which is provided with a bellows (11), the lower side of the left end of which is provided with a discharge port (12), a rotating shaft (13) is provided inside the conveying tube (9), the right end of which is rotatably connected to the inside of the shell (8), a spiral blade (14) is fixedly connected to the outside of the rotating shaft (13), the outer wall of which is tightly fitted with the inner wall of the conveying tube (9), a motor (15) is fixedly connected to the right end of the shell (8), the driving end of which is fixedly connected to the right end of the rotating shaft (13), and a pushing component is provided outside the regulating tube (10).

2. The energy-saving sesame processing and feeding equipment based on intelligent speed regulation according to claim 1 is characterized in that: The front and rear sides of the shell (8) are fixedly connected to a column (33), the ends of the column (33) are rotatably connected to a fixed plate (34), the bottom of the fixed plate (34) is fixedly connected to the upper side of the bottom plate (1), and the top of the fixed plate (34) is fixedly connected to the outside of the hopper (3).

3. The energy-saving sesame processing and feeding equipment based on intelligent speed regulation according to claim 1 is characterized in that: The pushing assembly comprises a movable plate (16) movably arranged in the middle of the base plate (1), an electric push rod (17) is arranged in the middle of the movable plate (16), the right end of the electric push rod (17) is fixedly connected to the inside of the base plate (1), the driving end of the electric push rod (17) is fixedly connected to a first connecting block (19), the outer wall of the first connecting block (19) is fixedly connected to the left end of the movable plate (16), and the inside of the base plate (1) is fixedly connected to limit rods (18) on both the front and rear sides of the electric push rod (17), and the left end of the limit rod (18) is inserted into the inside of the movable plate (16).

4. The energy-saving sesame processing feeding equipment based on intelligent speed regulation according to claim 3 is characterized in that: The pushing assembly also includes an electric slide rail (20) installed on the upper side of the movable plate (16), and a slider (21) movable left and right is arranged on the outside of the electric slide rail (20), and the left end of the slider (21) is rotatably connected to a pushing rod (22), and the end of the pushing rod (22) is rotatably connected to a second connecting block (23), and the upper side of the second connecting block (23) is fixedly connected to a mounting block (24), and the inner wall of the mounting block (24) is fixedly connected to the outside of the right end of the regulating tube (10).

5. The energy-saving sesame processing and feeding equipment based on intelligent speed regulation according to claim 1 is characterized in that: The outside of the delivery pipe (9) is fixedly connected to a fixing ring (27), the left side of the fixing ring (27) is fixedly connected to a fixing rod (28), the left end of the fixing rod (28) respectively passes through the four corners of the mounting block (24) and is fixedly connected to a ring body (29), and the lower end of the ring body (29) is rotatably connected to a rotating ring (31).

6. The energy-saving sesame processing and feeding equipment based on intelligent speed regulation according to claim 1 is characterized in that: A cushion block (30) for cooperating with a rotating ring (31) is fixedly connected to the lower side of the left end of the regulating tube (10).

7. The energy-saving sesame processing and feeding equipment based on intelligent speed regulation according to claim 1 is characterized in that: Two rotatably connected rotating plates (32) are provided on both the front and rear sides of the corrugated tube (11), and the opposite ends of the rotating plates (32) are fixedly connected to the outside of the regulating tube (10).

8. The energy-saving sesame processing and feeding equipment based on intelligent speed regulation according to claim 1 is characterized in that: The screening assembly comprises a cylinder (35) arranged inside a screening barrel (5), the outside of the cylinder (35) being fixedly connected to a spiral screening plate (36), the outside of the cylinder (35) being fixedly connected to a spiral guide plate (37) located below the spiral screening plate (36), the outer walls of the spiral guide plate (37) and the spiral screening plate (36) being tightly fitted with the inner wall of the screening barrel (5), the upper ends of the spiral screening plate (36) and the spiral guide plate (37) being fixedly connected to a second partition plate (39), the lower ends of the spiral screening plate (36) and the spiral guide plate (37) being fixedly connected to a first partition plate (38), and a discharge port (42) being arranged at the lower right end of the screening barrel (5).

9. The energy-saving sesame processing and feeding equipment based on intelligent speed regulation according to claim 8 is characterized in that: A second cover plate (40) is fixedly connected to the top of the screening barrel (5), a vibrator (41) is fixedly connected to the lower side of the second cover plate (40), and a driving end of the vibrator (41) is fixedly connected to the inside of the upper end of the cylinder (35).

10. The energy-saving sesame processing and feeding equipment based on intelligent speed regulation according to claim 3 is characterized in that: A first roller (25) is installed on the lower side of the left end of the movable plate (16), and a second roller (26) is installed on the lower side of the bottom plate (1).

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