Upper and lower bottom surface feeding device

Abstract

The invention relates to the technical field of feeding devices, in particular to an upper and lower bottom surface feeding device which comprises a mounting base, a feeding frame is arranged on the mounting base, a circulating feeding mechanism used for feeding materials from a low position to a high position is arranged in the feeding frame, and a clamping assembly and a suction assembly are arranged at the inner top of the feeding frame. The material sucking assembly is used for sucking and moving materials on the circulating feeding mechanism, the material clamping assembly is used for clamping and positioning the materials sucked by the material sucking assembly, and a discharging hopper is arranged at the position, located on one side of the material clamping assembly, of the top of the feeding frame. The inner top of the feeding frame is further provided with a pushing assembly used for pushing the materials clamped and positioned by the clamping assembly into the discharging hopper. According to the feeding device, automatic feeding of the materials can be achieved easily, the continuity of the material feeding process can be improved easily, and then the feeding efficiency of the materials can be improved easily.

Description

Technical Field

[0001] The present invention relates to the technical field of feeding devices, in particular to an upper and lower bottom surface feeding device. Background Art

[0002] In industries such as pharmaceuticals, daily chemicals, food, beverages, and chemicals, cans are often used for storage, packaging, and storage. Cans are generally categorized by material, such as iron, paper, and aluminum cans. They can also be divided into cans and tinplate cans based on the type of lid. A can seamer is a mechanical device used to seal lids onto cans and is widely used in the top and bottom sealing processes of cans.

[0003] Currently, common can seamers require can lids from the upper and lower surfaces of containers to be loaded into the seamer's hopper during operation. This loading method typically involves an operator placing the lids into the hopper via a staircase installed on the side of the seamer. However, this manual loading process is time-consuming and requires long intervals, resulting in low loading efficiency. Summary of the Invention

[0004] In order to realize automatic loading of materials, thereby improving the continuity of the material loading process and further improving the material loading efficiency, the present application provides an upper and lower bottom surface loading device.

[0005] The present application provides a top and bottom loading device, which adopts the following technical solution: A feeding device for upper and lower bottom surfaces includes a mounting base, a loading rack is provided on the mounting base, a circulating feeding mechanism for feeding materials from a low place to a high place is provided in the loading rack, a suction component and a clamping component are provided on the inner top of the loading rack, the suction component is used to adsorb and move the materials on the circulating feeding mechanism, the clamping component is used to clamp and position the materials adsorbed by the suction component, a lower hopper is provided on the top of the loading rack on one side of the clamping component, and a pushing component is also provided on the inner top of the loading rack for pushing the materials clamped and positioned by the clamping component into the lower hopper.

[0006] By adopting the above technical solution, the circulating feeding mechanism is used to help send materials from a low place to a high place, the suction component is used in conjunction with the clamping component to help adsorb the materials sent to a high place to a specific position for clamping and positioning, and the pushing component is used to help push the clamped and positioned materials into the lower hopper, thereby helping the materials to slide along the lower hopper to the inside of the silo, and then helping to realize the automatic loading of materials, thereby helping to improve the continuity of the material loading process, and then helping to improve the material loading efficiency.

[0007] In a specific feasible implementation scheme, the suction assembly includes a mounting frame, a driving cylinder, a mounting plate, a connecting piece and a suction cup, the mounting frame is arranged on the inner top of the loading rack, the driving cylinder is arranged on the mounting frame, and the piston rod of the driving cylinder extends toward the circulating feeding mechanism, the mounting plate is arranged on the piston rod of the driving cylinder, the connecting piece is arranged on the mounting plate, and the suction cup is arranged on the connecting piece.

[0008] By adopting the above technical solution, after the circulating feeding mechanism sends the material to a high place, the driving cylinder is used to help drive the mounting plate to move toward the material at a high place, thereby helping to drive the suction cup to move toward the material through the connecting piece, and then helping to use the suction cup to absorb and grab the material, and then the driving cylinder is used to help drive the suction cup and the material to move into the clamping assembly, thereby helping to use the clamping assembly to clamp and position the material.

[0009] In a specific possible implementation scheme, the connecting part includes a fixed part, a movable part and an elastic connecting part, the fixed part is arranged on the mounting plate, the movable part is movably inserted in the fixed part, the suction suction cup is arranged on one end of the movable part away from the fixed part, one end of the elastic connecting part is connected to the fixed part, and the other end of the elastic connecting part is connected to the movable part.

[0010] By adopting the above technical solution, the movable connection between the fixed part and the movable part and the setting of the elastic connecting part help to elastically support the suction cup, thereby helping to ensure the suction effect of the suction cup on the material while minimizing damage to the material caused by the connecting part.

[0011] In a specific feasible implementation scheme, the material clamping assembly includes a fixed plate, which is arranged at the inner top of the loading rack and above the circulating feeding mechanism, and fixed seats are provided at both ends of the fixed plate in the horizontal direction. A movable rod is movably inserted on the fixed seat, and a material clamping block is provided at one end of the movable rod close to the middle position of the fixed plate. A connecting spring is provided on the movable rod, and one end of the connecting spring is connected to the material clamping block, and the other end of the connecting spring is connected to the fixed seat.

[0012] By adopting the above technical solution, when the suction cup drives the material to move upward, the movable rod and the connecting spring are used to help the clamping block elastically clamp the material, thereby helping to clamp and position the material at a set position.

[0013] In a specific possible implementation scheme, a guide slope and a material holding surface are sequentially arranged on the side wall of the material holding block facing away from the movable rod in a bottom-up direction, the distance between the bottom end of the guide slope and the movable rod is smaller than the distance between the top end of the guide slope and the movable rod, and the material holding surface is arranged in a vertical direction.

[0014] By adopting the above technical solution, the setting of the guide slope helps to abut against the upward moving material, thereby helping to move the two clamping blocks in the direction away from the material; the clamping surface helps to elastically tighten the material, thereby helping to clamp and position the material at the set position.

[0015] In a specific feasible implementation scheme, the circulating feeding mechanism includes two groups of rotating shafts, and the two groups of rotating shafts are arranged at intervals inside the loading rack. Each group of rotating shafts includes two rotating shafts arranged at intervals in the vertical direction, and each rotating shaft is provided with a rotating gear. The rotating gears on the two rotating shafts in the same group are jointly provided with a feeding chain, and a plurality of feeding plates are arranged at intervals in the circumferential direction of the feeding chain. A driving assembly and a transmission assembly are provided in the loading rack, and the transmission assembly is used to drive the two groups of rotating shafts to rotate synchronously under the drive of the driving assembly.

[0016] By adopting the above technical solution, the transmission component is used in conjunction with the drive component to help drive the two sets of rotating shafts to rotate synchronously, thereby helping to drive the feeding chain to rotate synchronously, and then helping to use the feeding plate on the feeding chain to transport materials from a low place to a high place.

[0017] In a specific possible implementation scheme, the transmission assembly includes a transmission shaft, a first bevel gear and a second bevel gear. The transmission shaft is rotatably arranged in the loading rack, the first bevel gear is fixedly sleeved on both side ends of the transmission shaft, the second bevel gear is arranged on the rotating shaft, and each of the second bevel gears is engaged with one of the first bevel gears.

[0018] By adopting the above technical solution, the driving assembly helps to drive the transmission shaft to rotate, thereby helping to drive the first bevel gear to rotate synchronously, and further helping to drive the second bevel gear and the rotating shaft to rotate synchronously under the meshing action.

[0019] In a specific possible implementation scheme, the driving assembly includes a driving motor, a driving gear and a driven gear. The driving motor is arranged in the loading rack, the driving gear is arranged at the output end of the driving motor, the driven gear is fixedly sleeved on the transmission shaft, and the driven gear is meshed with the driving gear.

[0020] By adopting the above technical solution, the driving motor is used to help drive the driving gear to rotate, thereby helping to drive the driven gear and the transmission shaft to rotate under the meshing action.

[0021] In a specific possible implementation scheme, a guide shaft is provided on the mounting plate, the guide shaft is arranged parallel to the piston rod of the driving cylinder, a guide sleeve is provided on the mounting frame, and the guide shaft is inserted inside the guide sleeve.

[0022] By adopting the above technical solution, the guide shaft is used in conjunction with the guide sleeve to help guide the moving path of the mounting plate, thereby helping to improve the accuracy of the moving direction of the suction nozzle, and further helping to ensure the clamping and positioning effect of the clamping component on the material.

[0023] In a specific possible implementation scheme, the loading rack is arranged at an angle, and a support frame for supporting the loading rack is provided on the mounting base.

[0024] By adopting the above technical solution, the inclined loading rack helps to improve the smoothness of the material sliding from the lower hopper to the inside of the silo; the support frame helps to support the loading rack, thereby helping to improve the stability of the loading rack.

[0025] In summary, this application includes at least one of the following beneficial technical effects: 1. This application sets up a circulating feeding mechanism, a suction component, a clamping component and a pushing component. The circulating feeding mechanism helps to send materials from a low place to a high place. The suction component cooperates with the clamping component to help adsorb the materials sent to a high place to a specific position for clamping and positioning. The pushing component helps to push the clamped and positioned materials into the lower hopper, thereby helping to make the materials slide along the lower hopper to the inside of the silo, and then helping to realize the automatic loading of materials, thereby helping to improve the continuity of the material loading process, and then helping to improve the material loading efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0027] Figure 2 It is a schematic diagram that reflects the specific structure of the transmission component.

[0028] Figure 3 It is a schematic diagram showing the specific structure of the suction component.

[0029] Figure 4 It is a schematic diagram that reflects the specific structure of the connector.

[0030] Figure 5 yes Figure 3 Enlarged view of point A in the middle.

[0031] Figure 6 It is a schematic diagram showing the specific structure of the pusher assembly.

[0032] Explanation of the accompanying symbols: 1. Mounting base; 2. Loading rack; 3. Suction assembly; 31. Mounting rack; 32. Driving cylinder; 33. Mounting plate; 34. Connecting piece; 35. Suction cup; 4. Clamping assembly; 41. Fixing plate; 42. Fixing seat; 43. Movable rod; 44. Clamping block; 45. Connecting spring; 5. Hopper; 6. Pushing assembly; 61. Pushing cylinder; 62. Pushing block; 7. Fixed part; 8. Movable part ;9. Elastic connecting part; 10. Guide ramp; 11. Clamping surface; 12. Rotating shaft; 13. Rotating gear; 14. Feeding chain; 15. Feeding plate; 16. Driving assembly; 161. Driving motor; 162. Driving gear; 163. Driven gear; 17. Transmission assembly; 171. Transmission shaft; 172. First bevel gear; 173. Second bevel gear; 18. Guide shaft; 19. Guide bushing; 20. Support frame. DETAILED DESCRIPTION

[0033] The present application is further described in detail below with reference to the accompanying drawings.

[0034] The present application discloses an upper and lower bottom loading device, referring to Figure 1 and Figure 2 , including a mounting base 1, on which a loading rack 2 is fixedly mounted. In this embodiment, the loading rack 2 is tilted, and a support frame 20 is provided on one side of the loading rack 2 on the mounting base 1, and a circulating feeding mechanism is provided inside the loading rack 2.

[0035] Reference Figure 1 and Figure 2 The circulating feeding mechanism includes two groups of rotating shafts 12 arranged at intervals in the horizontal direction inside the loading rack 2. The number of rotating shafts 12 in each group is two, and the two rotating shafts 12 are arranged at intervals in the vertical direction. Two rotating gears 13 are fixedly connected to each rotating shaft 12 at intervals. The two rotating gears 13 on the two rotating shafts 12 in the same group are jointly connected with a feeding chain 14. A plurality of feeding plates 15 are installed at intervals on the circumferential outer wall of each feeding chain 14.

[0036] Reference Figure 1 and Figure 2The circulating feeding mechanism also includes a transmission assembly 17 and a drive assembly 16 arranged at the bottom of the loading rack 2. The transmission assembly 17 includes a transmission shaft 171, a first bevel gear 172 and a second bevel gear 173. In this embodiment, there are two first bevel gears 172 and second bevel gears 173. The transmission shaft 171 is rotatably mounted in the loading rack 2. The two first bevel gears 172 are fixedly sleeved on both side ends of the transmission shaft 171. Each second bevel gear 173 is fixedly sleeved on one end of the rotating shaft 12 close to the first bevel gear 172, and each second bevel gear 173 is meshed with a first bevel gear 172. The drive assembly 16 includes a driving motor 161, a driving gear 162 and a driven gear 163. The driving motor 161 is fixedly mounted in the loading rack 2. The driving gear 162 is fixedly mounted on the output end of the driving motor 161. The driven gear 163 is fixedly sleeved on the transmission shaft 171, and the driven gear 163 is meshed with the driving gear 162.

[0037] Reference Figure 1 and Figure 2 When loading materials, the operator places multiple layers of material onto the lower feed plate 15. The drive motor 161 operates, driving the driving gear 162 to rotate, thereby meshing and driving the driven gear 163 and the transmission shaft 171 to rotate synchronously. When the transmission shaft 171 rotates, the first bevel gears 172 at each end of the transmission shaft 171 rotate synchronously, driven by the transmission shaft 171. This meshes and drives the two second bevel gears 173 and the two rotating shafts 12 to rotate synchronously. When the rotating shaft 12 rotates, it cooperates with the rotating gear 13 to drive the multiple feeding chains 14 to rotate synchronously, thereby facilitating the transport of multiple layers of material from a lower location to a higher location via the feed plate 15.

[0038] Reference Figure 3 and Figure 4 A suction assembly 3 is provided at the inner top of the loading rack 2, and the suction assembly 3 includes a mounting frame 31, a driving cylinder 32, a mounting plate 33, a connecting piece 34 and a suction cup 35. In this embodiment, the connecting piece 34 includes a fixed part 7, a movable part 8 and an elastic connecting part 9. The mounting frame 31 is fixedly mounted on the inner top of the loading rack 2, the driving cylinder 32 is fixedly mounted on the mounting frame 31, and the piston rod of the driving cylinder 32 extends downward, the mounting plate 33 is fixedly mounted on the piston rod of the driving cylinder 32, the fixed part 7 is fixedly mounted on the mounting plate 33, the movable part 8 is movably inserted in the bottom end of the fixed part 7, the top end of the elastic connecting part 9 is fixedly connected to the fixed part 7, the bottom end of the elastic connecting part 9 is fixedly connected to the movable part 8, and the suction cup 35 is fixedly mounted on the bottom end of the movable part 8. A guide shaft 18 is fixedly mounted on the top surface of the mounting plate 33 , and the guide shaft 18 is parallel to the piston rod of the driving cylinder 32 . A guide sleeve 19 is installed through the mounting frame 31 , and the guide shaft 18 is inserted into the guide sleeve 19 .

[0039] Reference Figure 3 and Figure 5 A material clamping assembly 4 is also provided at the top inner portion of the loading rack 2. The material clamping assembly 4 includes a fixed plate 41, which is fixedly mounted on the inner top portion of the loading rack 2. Fixed seats 42 are fixedly mounted at both ends of the fixed plate 41 in the horizontal direction. A movable rod 43 is slidably inserted on the fixed seat 42. A material clamping block 44 is fixedly mounted on one end of the movable rod 43 near the middle of the fixed plate 41. A connecting spring 45 is sleeved on the movable rod 43, and one end of the connecting spring 45 is fixedly connected to the material clamping block 44, and the other end is fixedly connected to the fixed seat 42. The material clamping block 44 has a guide slope 10 and a material clamping surface 11 along the side wall facing away from the movable rod 43, in sequence from bottom to top. The distance between the bottom end of the guide slope 10 and the movable rod 43 is smaller than the distance between the top end of the guide slope 10 and the movable rod 43. The material clamping surface 11 is arranged in the vertical direction.

[0040] Reference Figure 6 A lower hopper 5 is fixedly mounted on the top outer wall of the loading rack 2, and a pushing assembly 6 is provided on the side wall of the top outer wall of the loading rack 2 facing away from the lower hopper 5. The pushing assembly 6 includes a pushing cylinder 61 and a pushing block 62. The pushing cylinder 61 is fixedly mounted on the top outer wall of the loading rack 2, and the pushing block 62 is fixedly mounted on the piston rod of the pushing cylinder 61.

[0041] Reference Figure 3 When multiple layers of material are delivered to a high position, the piston rod of the drive cylinder 32 extends, driving the mounting plate 33 downward, thereby driving the connecting piece 34 and the material suction cup 35 downward simultaneously, allowing the material suction cup 35 to absorb and grab the material on the top layer. Then, the piston rod of the drive cylinder 32 retracts, driving the mounting plate 33 upward, thereby driving the connecting piece 34, the material suction cup 35, and the material upward simultaneously.

[0042] Reference Figure 3 and Figure 4 During the raising and lowering of the mounting plate 33, the guide shaft 18 cooperates with the guide sleeve 19 to guide the movement path of the mounting plate 33, thereby improving the accuracy of the suction nozzle's movement direction and, in turn, ensuring the accuracy of the material's upward movement. As the suction cup 35 absorbs and grabs the material, the elastic connecting portion 9 cooperates with the fixed portion 7 and the movable portion 8 to elastically support the suction cup 35, thereby ensuring the suction effect of the suction cup 35 while minimizing damage to the material caused by the connecting member 34.

[0043] Reference Figure 3 and Figure 5During the upward movement of the material, the elastic force of the connecting spring 45 causes the two guide ramps 10 to elastically press against the opposite sides of the material. When the material moves between the two clamping surfaces 11, the two clamping surfaces 11 engage and position the material, thereby securing it in the set position. The piston rod of the push cylinder 61 then extends, driving the pusher block 62 to push the material, thereby pushing it into the lower hopper 5. The material slides along the lower hopper 5 into the silo, thereby facilitating automated material loading, thereby improving the continuity of the material loading process and, in turn, increasing material loading efficiency.

[0044] The operating principle of the embodiment of the present application is as follows: when loading materials, the operator places multiple layers of material onto the lower feed plate 15, and the drive motor 161 is activated, driving the driving gear 162 to rotate, thereby helping to drive the driven gear 163 and the transmission shaft 171 to rotate synchronously under the meshing action. When the transmission shaft 171 rotates, the first bevel gears 172 at both ends of the transmission shaft 171 rotate synchronously under the drive of the transmission shaft 171, thereby helping to drive the two second bevel gears 173 and the two rotating shafts 12 to rotate synchronously under the meshing action. When the rotating shaft 12 rotates, it helps to drive the multiple feeding chains 14 to rotate synchronously with the cooperation of the rotating gear 13, thereby facilitating the transportation of multiple layers of material from a lower location to a higher location via the feed plate 15.

[0045] When multiple layers of material are delivered to a high position, the piston rod of the drive cylinder 32 extends, driving the mounting plate 33 downward, thereby driving the connecting piece 34 and the material suction cup 35 to move downward synchronously, allowing the material suction cup 35 to absorb and grab the material on the top layer. Afterwards, the piston rod of the drive cylinder 32 retracts, driving the mounting plate 33 upward, thereby driving the connecting piece 34, the material suction cup 35, and the material to move upward synchronously.

[0046] During the upward movement of the material, the two guide ramps 10 elastically press against the opposite sides of the material under the action of the elastic force of the connecting spring 45. When the material moves between the two clamping surfaces 11, the two clamping surfaces 11 will clamp and position the material, thereby fixing the material in the set position. Afterwards, the piston rod of the pushing cylinder 61 extends, driving the pushing block 62 to push the material, thereby pushing the material into the lower hopper 5, causing the material to slide along the lower hopper 5 into the silo, thereby facilitating the automatic loading of the material, thereby helping to improve the continuity of the material loading process and thus helping to improve the material loading efficiency.

[0047] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A device for loading upper and lower bottom surfaces, characterized in that: The utility model comprises a mounting base (1), a loading rack (2) is provided on the mounting base (1), a circulating feeding mechanism for feeding materials from a low place to a high place is provided in the loading rack (2), a suction component (3) and a clamping component (4) are provided at the inner top of the loading rack (2), the suction component (3) is used to absorb and move the materials on the circulating feeding mechanism, the clamping component (4) is used to clamp and position the materials absorbed by the suction component (3), a lower hopper (5) is provided at the top of the loading rack (2) on one side of the clamping component (4), and a pushing component (6) is also provided at the inner top of the loading rack (2) for pushing the materials clamped and positioned by the clamping component (4) into the lower hopper (5).

2. The upper and lower bottom surface loading device according to claim 1, characterized in that: The material suction assembly (3) comprises a mounting frame (31), a driving cylinder (32), a mounting plate (33), a connecting piece (34) and a material suction cup (35); the mounting frame (31) is arranged on the inner top of the loading frame (2); the driving cylinder (32) is arranged on the mounting frame (31), and the piston rod of the driving cylinder (32) extends toward the circulating feeding mechanism; the mounting plate (33) is arranged on the piston rod of the driving cylinder (32); the connecting piece (34) is arranged on the mounting plate (33); and the material suction cup (35) is arranged on the connecting piece (34).

3. The upper and lower bottom surface loading device according to claim 2, characterized in that: The connecting member (34) comprises a fixed portion (7), a movable portion (8) and an elastic connecting portion (9); the fixed portion (7) is arranged on the mounting plate (33); the movable portion (8) is movably inserted into the fixed portion (7); the material suction cup (35) is arranged at one end of the movable portion (8) away from the fixed portion (7); one end of the elastic connecting portion (9) is connected to the fixed portion (7); and the other end of the elastic connecting portion (9) is connected to the movable portion (8).

4. The upper and lower bottom surface loading device according to claim 1, characterized in that: The clamping assembly (4) includes a fixed plate (41), which is arranged on the inner top of the loading rack (2) and above the circulating feeding mechanism. Fixed seats (42) are provided at both ends of the fixed plate (41) in the horizontal direction. A movable rod (43) is movably inserted on the fixed seat (42). A clamping block (44) is provided at one end of the movable rod (43) close to the middle position of the fixed plate (41). A connecting spring (45) is sleeved on the movable rod (43), and one end of the connecting spring (45) is connected to the clamping block (44), and the other end of the connecting spring (45) is connected to the fixed seat (42).

5. The upper and lower bottom surface loading device according to claim 4, characterized in that: A guide slope (10) and a material-locking surface (11) are sequentially arranged on a side wall of the material-locking block (44) facing away from the movable rod (43) in a bottom-up direction. The distance between the bottom end of the guide slope (10) and the movable rod (43) is smaller than the distance between the top end of the guide slope (10) and the movable rod (43), and the material-locking surface (11) is arranged in a vertical direction.

6. The upper and lower bottom loading device according to claim 1, characterized in that: The circulating feeding mechanism comprises two groups of rotating shafts (12), the two groups of rotating shafts (12) are arranged at intervals inside the loading rack (2), each group of rotating shafts (12) comprises two rotating shafts (12) arranged at intervals in the vertical direction, each rotating shaft (12) is sleeved with a rotating gear (13), the rotating gears (13) on the two rotating shafts (12) in the same group are sleeved with a feeding chain (14), a plurality of feeding plates (15) are arranged at intervals on the circumference of the feeding chain (14), a driving assembly (16) and a transmission assembly (17) are arranged in the loading rack (2), and the transmission assembly (17) is used to drive the two groups of rotating shafts (12) to rotate synchronously under the drive of the driving assembly (16).

7. The upper and lower bottom surface loading device according to claim 6, characterized in that: The transmission assembly (17) includes a transmission shaft (171), a first bevel gear (172) and a second bevel gear (173); the transmission shaft (171) is rotatably arranged in the loading rack (2); the first bevel gear (172) is fixedly sleeved on both side ends of the transmission shaft (171); the second bevel gear (173) is arranged on the rotating shaft (12), and each of the second bevel gears (173) is meshed with one of the first bevel gears (172).

8. The upper and lower bottom loading device according to claim 7, characterized in that: The driving assembly (16) comprises a driving motor (161), a driving gear (162) and a driven gear (163); the driving motor (161) is arranged in the loading rack (2); the driving gear (162) is arranged at the output end of the driving motor (161); the driven gear (163) is fixedly sleeved on the transmission shaft (171), and the driven gear (163) is meshed with the driving gear (162).

9. The upper and lower bottom surface loading device according to claim 2, characterized in that: A guide shaft (18) is provided on the mounting plate (33), and the guide shaft (18) is arranged parallel to the piston rod of the driving cylinder (32). A guide sleeve (19) is provided on the mounting frame (31), and the guide shaft (18) is inserted into the guide sleeve (19).

10. The upper and lower bottom surface loading device according to claim 1, characterized in that: The loading rack (2) is arranged at an angle, and a support frame (20) for supporting the loading rack (2) is provided on the mounting base (1).

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