A feeding and unloading device for a straightening machine

Abstract

This invention discloses a loading and unloading device for a straightening machine, including a gantry crane. The gantry crane travels on tracks on both sides, and a straightening machine is installed between the tracks. At least two vertically downward telescopic booms are installed below the gantry crane, each with a hook at its base. At least one second frame is located on one side of the straightening machine, with multiple second placement beams parallel to the tracks on its top for placing the rods to be straightened. At least one first frame is located on the side of the second frame away from the straightening machine, with multiple first placement beams parallel to the tracks on its top for placing the rods straightened by the straightening machine. In use, the rods to be straightened are placed on the second placement beams and then lifted one by one by the gantry crane to the straightening machine for straightening. After straightening, the gantry crane transports the straightened rods to the first placement beams for stacking.

Description

Technical Field

[0001] This utility model relates to the field of straightening machine technology, specifically to a loading and unloading device for a straightening machine. Background Technology

[0002] Straightening is a crucial process step in the early stages of drill rod machining and a key method to ensure coaxiality during subsequent turning processes. The object of straightening is the raw material of the drill rod, namely round steel. A single piece of round steel can be up to 9 meters long and weigh over 3 tons.

[0003] In traditional processing, operators rely on overhead cranes to lift round steel bars using slings and place them onto the straightening machine's worktable for straightening. This method is inefficient due to the inherent limitations of the overhead crane equipment, and the long and heavy round steel bars pose safety risks such as collisions and injuries from falling steel bars during transport. Furthermore, the low precision of the overhead crane causes slight collisions with the worktable during placement, increasing the risk of equipment damage over time. Therefore, we propose a loading and unloading device for the straightening machine. Utility Model Content

[0004] This utility model provides a loading and unloading device for a straightening machine, which has the advantages of continuous straightening and a large number of straightened rods, and the rods to be straightened and the straightened rods can be placed in sections, thus solving the problems mentioned in the background art.

[0005] The technical solution of this utility model is implemented as follows: A loading and unloading device for a straightening machine includes a gantry crane. The gantry crane travels on tracks on both sides. A straightening machine is provided between the tracks. At least two vertically downward telescopic arms are installed below the gantry crane. Hooks are installed below the telescopic arms. At least one second frame is provided on one side of the straightening machine. Multiple second placement beams parallel to the tracks are provided on the top of the second frame for placing the rod to be straightened. At least one first frame is provided on the side of the second frame away from the straightening machine. Multiple first placement beams parallel to the tracks are provided on the top of the first frame for placing the rod after it has been straightened by the straightening machine.

[0006] Preferably, the telescopic boom includes a vertically downward supporting frame, the top of which is connected to a crane, and a mounting plate is provided at the bottom of the supporting frame. A third telescopic device is vertically provided at the top of the mounting plate, the free end of which extends below the mounting plate and is connected to a hook. Guide rods parallel to the third telescopic device are provided on both sides of the top of the hook, and the guide rods are movably placed inside the mounting plate.

[0007] Preferably, the second placement beam includes a second horizontal portion and a downwardly inclined second inclined portion. The second horizontal portion has a third stop at one end near the first frame, and the second inclined portion has a first top seat on one side of its bottom. The first top seat has a fourth stop at the end away from the third stop. Each first top seat has a first guide shaft vertically mounted at its bottom. At least one first guide seat is movably sleeved on the first guide shaft. The first guide seat is connected to the second frame. A second drive arm is movably mounted at the bottom of the first guide shaft. The other end of each second drive arm is mounted on a first connecting shaft. The first connecting shaft is located below the second inclined portion and is rotatably connected to the second frame. A first telescopic device is rotatably mounted below at least one second inclined portion. The bottom of the first telescopic device is rotatably connected to one end of the first drive arm, and the other end of the first drive arm is fixed to the first connecting shaft. When the first telescopic device extends or retracts, it can drive the first connecting shaft to rotate. The first connecting shaft can drive the first guide shaft to extend or retract up and down within the first guide seat through the second drive arm. In the initial state, the top of the first top seat is located below the second inclined portion.

[0008] Preferably, a second connecting shaft is provided parallel above the first connecting shaft. The second connecting shaft is rotatably connected to the second frame. Multiple blocking arms are installed on the second connecting shaft. A fourth telescopic device is rotatably installed in the middle of at least one blocking arm. The other end of the fourth telescopic device is rotatably connected to the side of the second horizontal part. When the fourth telescopic device extends or retracts, it can drive the second connecting shaft to rotate through the blocking arm, so that the top of the blocking arm extends above the second inclined part or retracts below the second inclined part.

[0009] Preferably, a support beam is provided on the side of the second frame away from the first frame. Several support grooved wheels are rotatably mounted on the top of the support beam. The support grooved wheels are driven to rotate by a drive device. A connecting beam is provided parallel to the bottom of the support beam. The two ends of the connecting beam are respectively connected to the first support. In the initial state, the bottom of the support beam is placed on the top of the first support. At least two worm gear screw jacks and a reducer are installed on the top of the connecting beam. A second motor is installed on the input end of the reducer, and the reducer and the worm gear screw jacks are connected by a connecting rod. When the second motor drives the reducer to rotate, the reducer can synchronously drive each worm gear screw jack to move synchronously through the connecting rod. The top of each worm gear screw jack is connected to the bottom of the support beam, allowing the worm gear screw jacks to drive the support beam to move up and down. The top of the support beam is also provided with multiple support plates, which are distributed between the support grooved wheels. A fifth stop is provided at the top of the support plate away from the second frame, and an inclined upward receiving part is provided at the top of the support plate near the second frame. The position of the receiving part corresponds to the third stop. A sensor is also provided at one end of the support beam, and the sensor is mounted on the bracket.

[0010] Preferably, the first placement beam includes a first horizontal portion and an upwardly inclined first inclined portion. A second stop is provided at the end of the first horizontal portion away from the second frame. A support seat is installed in a step below the top of the first inclined portion. A first stop is provided at the end of the support seat. A second top seat is provided on one side of each support seat. A second guide shaft is vertically installed at the bottom of each second top seat. At least one second guide seat is movably sleeved on the second guide shaft. The second guide seat is installed on the first frame. A fourth drive arm is movably installed at the bottom of each second guide shaft. The other end of each fourth drive arm is installed on a third connecting shaft. The third connecting shaft is located below the first inclined portion and is rotatably installed on the first frame. A second telescopic device is rotatably installed below at least one first inclined portion. The bottom of the second telescopic device is connected to one end of the third drive arm. The other end of the third drive arm is installed on the third connecting shaft. When the second telescopic device extends or retracts, the second telescopic device can drive the third connecting shaft to rotate through the third drive arm, so that the third connecting shaft drives the second guide shaft to extend and retract up and down within the second guide seat through the fourth drive arm. In the initial state, the second top seat is below the top surface of the support seat.

[0011] Preferably, the drive device includes a first motor disposed below one end of the support beam, and sprockets are provided on the shaft of the first motor and one end of the support groove wheel, with the sprockets connected to each other by a chain.

[0012] Preferably, the bottom of the connecting beam is provided with at least one second support.

[0013] Compared with the prior art, in use, the rods to be straightened are placed on the second placement beam and stacked, and then lifted one by one by the overhead crane to the straightening machine for straightening. After straightening is completed, the overhead crane transports the straightened rods to the first placement beam for stacking. This process can be repeated multiple times, and both the rods to be straightened and the straightened rods can be placed separately, and a large number of rods can be stacked. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a structural schematic diagram of the overhead crane of this utility model.

[0016] Figure 2 This is a schematic diagram of the structure between the first frame, the second frame, and the support beam of this utility model. Figure 1 .

[0017] Figure 3 This is a schematic diagram of the structure between the first frame, the second frame, and the support beam of this utility model. Figure 2 .

[0018] Figure 4 This is a schematic diagram of the structure between the first frame, the second frame, and the support beam of this utility model. Figure 3 .

[0019] Figure 5 This is a schematic diagram of the structure between the first frame and the second frame of this utility model. Figure 1 .

[0020] Figure 6 This is a schematic diagram of the structure between the first frame and the second frame of this utility model. Figure 2 .

[0021] Figure 7 This is a schematic diagram of the specific structure of the support beam of this utility model. Figure 1 .

[0022] Figure 8 This is a schematic diagram of the specific structure of the support beam of this utility model. Figure 2 .

[0023] Figure 9 This is a schematic diagram of the structure of the support frame of this utility model. Figure 1 .

[0024] Figure 10 This is a schematic diagram of the structure of the support frame of this utility model. Figure 2 .

[0025] Figure 11 This is a complete structural schematic diagram of the present invention.

[0026] In the diagram: 1. Track; 2. Overhead crane; 3. Support frame; 4. Hook; 5. Straightening machine; 6. Mounting plate; 7. Guide rod; 8. Third telescopic device; 9. Bracket; 10. Support beam; 11. First stop; 12. Support seat; 13. First inclined section; 14. First horizontal section; 15. First placement beam; 16. First frame; 17. Second frame; 18. Second stop; 19. Second horizontal section; 20. Second inclined section; 21. Second placement beam; 22. Third stop; 23. First drive arm; 24. First connecting shaft; 25. Second connecting shaft; 26. Second drive arm; 27. First guide seat; 8. Fourth stop; 29. ​​First top seat; 30. First telescopic device; 31. Third connecting shaft; 32. Second guide shaft; 33. Second guide seat; 34. Second top seat; 35. Second telescopic device; 36. Third drive arm; 37. Fourth drive arm; 38. Fourth telescopic device; 39. First guide shaft; 40. Blocking arm; 41. Sensor; 42. Support plate; 43. Fifth stop; 44. Support groove wheel; 45. First motor; 46. First support; 47. Turbine screw jack; 48. Second motor; 49. Reducer; 50. Second support; 51. Connecting rod; 52. Connecting beam; 53. Receiving part. Detailed Implementation

[0027] The technical solution of this utility model will be clearly and completely described below with reference to its embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0028] Reference Figures 1 to 11 This utility model provides a technical solution: a loading and unloading device for a straightening machine, including a gantry crane 2. Tracks 1 are provided on both sides of the bottom of the gantry crane 2, and the tracks 1 are fixed to the ground. The gantry crane 2 travels on both sides of the tracks 1, allowing it to reciprocate along the tracks 1. It is important to emphasize that the loading and unloading devices are installed between two tracks 1, ensuring that both devices are within the working area of ​​the gantry crane 2. Figure 11 As shown, this figure is a complete schematic diagram of this application; At least two vertically downward telescopic booms are installed below the overhead crane 2, such as... Figure 9 and Figure 10As shown, the telescopic boom includes a vertically downward support frame 3. The top of the support frame 3 is connected to the overhead crane 2 (the top of the support frame 3 is specifically connected to the crane). In this way, the telescopic boom can move left and right along the overhead crane 2. The bottom of the support frame 3 is provided with a mounting plate 6. The top of the mounting plate 6 is vertically provided with a third telescopic device 8. The third telescopic device 8 is located inside the support frame 3. Hooks 4 are installed at the bottom of each telescopic arm. Specifically, the free end of the third telescopic device 8 extends to the bottom of the mounting plate 6 and connects with the hooks 4. Guide rods 7 parallel to the third telescopic device 8 are provided on both sides of the top of the hooks 4. The guide rods 7 are movably placed inside the mounting plate 6. The guide rods 7 can guide and support the hooks 4 to prevent the hooks 4 from deflecting. The hooks 4 rise and fall as the third telescopic device 8 extends and retracts.

[0029] The equipment between the two tracks 1 will be introduced one by one below. First, a straightening machine 5 is set between the tracks 1. The straightening machine 5 is used to straighten the metal rod.

[0030] like Figure 11 As shown, at least one second frame 17 is provided on one side of the straightening machine 5. The top of the second frame 17 is provided with multiple second placement beams 21 parallel to the track 1, which are used to place the rod to be straightened. On the side of the second frame 17 away from the straightening machine 5, at least one first frame 16 is provided. The top of the first frame 16 is provided with multiple first placement beams 15 parallel to the track 1, which are used to place the rod after it has been straightened by the straightening machine 5. That is, the blank is placed on the second placement beams 21, and the finished part is placed on top of the first frame 16.

[0031] like Figure 4 and Figure 5 As shown, the second placement beam 21 includes a second horizontal part 19 and a downwardly inclined second inclined part 20. The second horizontal part 19 is provided with a third stop 22 at one end near the first frame 16. The straightened rod is placed on the second horizontal part 19, and then the rod is rolled so that it rolls down along the second inclined part 20, which makes it easy to move the rod. like Figure 5 and Figure 6 As shown, a first top seat 29 is provided on one side of the bottom of the second inclined part 20. A fourth stop 28 is provided at the end of the first top seat 29 away from the third stop 22. A first guide shaft 39 is vertically installed at the bottom of each first top seat 29. At least one first guide seat 27 is movably sleeved on the first guide shaft 39. There are actually two first guide seats 27. The first guide seats 27 are connected to the second frame 17. When the first guide shaft 39 moves up and down in the first guide seat 27, the first top seat 29 can raise or lower its height. The bottom of the first guide shaft 39 is movably mounted with a second drive arm 26. It should be emphasized that, specifically, a strip-shaped opening (such as...) is provided at the end of the second drive arm 26 near the end of the first guide shaft 39. Figure 5 The location indicated by arrow A in the diagram is where the strip opening at the bottom of the second drive arm 26 is consistent with the strip opening at the bottom of the fourth drive arm 37, while the bottom of the first guide shaft 39 has a U-shaped structure, and the U-shaped structure is connected to the strip opening through a shaft, with the shaft placed inside the strip opening; The other ends of the second drive arms 26 are all mounted on the first connecting shaft 24, which is located below the second inclined portion 20 and rotatably connected to the second frame 17. A first telescopic device 30 is rotatably mounted below at least one of the second inclined portions 20. The bottom of the first telescopic device 30 is rotatably connected to one end of the first drive arm 23, and the other end of the first drive arm 23 is fixed to the first connecting shaft 24. Figure 5 As shown, the first drive arm 23 is similar to a lever, which is used to drive the first connecting shaft 24 to rotate, while the second drive arm 26 is similar to a lever, which is used to lift each of the first guide shafts 39. Therefore, when the first telescopic device 30 extends or retracts, it can drive the first connecting shaft 24 to rotate. The first connecting shaft 24 can drive the first guide shaft 39 to extend and retract up and down in the first guide seat 27 through the second drive arm 26. However, in the initial state, the top of the first top seat 29 is located below the second inclined part 20. like Figure 5 and Figure 6 As shown, a second connecting shaft 25 is arranged parallel above the first connecting shaft 24. The second connecting shaft 25 is rotatably connected to the second frame 17, and multiple blocking arms 40 are installed on the second connecting shaft 25. Figure 6 As shown, a fourth telescopic device 38 is rotatably mounted in the middle of at least one blocking arm 40. The fourth telescopic device 38 is always located below the second placement beam 21, and the other end of the fourth telescopic device 38 is rotatably connected to the side of the second horizontal part 19. Because the blocking arm 40 is connected to the second connecting shaft 25, the blocking arm 40 here is also equivalent to a lever. Therefore, when the fourth telescopic device 38 extends or retracts, the fourth telescopic device 38 can drive the second connecting shaft 25 to rotate through the blocking arm 40, so that the top of the blocking arm 40 extends above the second inclined part 20 or retracts below the second inclined part 20. The second frame 17 works as follows: In practice, the rods to be straightened are first placed on the top of the second horizontal part 19, and then the rods are pushed one by one onto the second inclined part 20. The rods rolling along the second inclined part 20 first come into contact with the blocking arm 40, that is, the blocking arm 40 blocks the rolling rods and also acts as a buffer. Then, the fourth telescopic device 38 extends and drives the top of the blocking arm 40 to move downward, so that its top is lowered below the second inclined part 20. At this time, the rods are not blocked by the blocking arm 40 and automatically roll onto the first top seat 29, where they are blocked by the fourth stop 28, preventing the rods from rolling off the top of the first top seat 29.

[0032] Furthermore, a support beam 10 is provided on the side of the second frame 17 away from the first frame 16, such as... Figure 7and Figure 8 As shown, a number of support grooved wheels 44 are rotatably mounted on the top of the support beam 10. The support grooved wheels 44 are driven to rotate by a driving device. The driving device includes a first motor 45 located below one end of the support beam 10. Sprockets are provided on the shaft of the first motor 45 and one end of the support grooved wheels 44. The sprockets are connected by a chain. When the first motor 45 rotates, it can drive all the support grooved wheels 44 to rotate together. A connecting beam 52 is provided parallel below the support beam 10. Both ends of the connecting beam 52 are connected to the first support 46. In the initial state, the bottom of the support beam 10 is placed on the top of the first support 46, that is, the support beam 10 and the first support 46 are not connected, but the support beam 10 is directly placed on the top of the first support 46. In order for the support beam 10 to achieve stable lifting and lowering, such as Figure 7 and Figure 8 As shown, at least two worm gear screw jacks 47 and a reducer 49 are installed on the top of the connecting beam 52. The reducer 49 is a worm gear reducer, and a second motor 48 is installed on the input end of the reducer 49. The reducer 49 and the worm gear screw jacks 47 are connected by a connecting rod 51, allowing the reducer 49 to simultaneously drive each worm gear screw jack 47 to move up and down via the connecting rod 51. Therefore, when the second motor 48 drives the reducer 49 to rotate, the reducer 49 can synchronously drive each worm gear screw jack 47 to move synchronously via the connecting rod 51. The top of each worm gear screw jack 47 is connected to the bottom of the support beam 10, so when the worm gear screw jack 47 moves up and down, it can drive the support beam 10 to move up and down, making the height of the support beam 10 and the support groove wheel 44 adjustable. like Figure 7 As shown, multiple support plates 42 are also provided on the top of the support beam 10. The top height of the support plate 42 corresponds to the height of the support groove wheel 44. The support plates 42 are distributed between the support groove wheels 44. A fifth stop 43 is provided at the top of the support plate 42 away from the second frame 17. An inclined upward receiving part 53 is provided at the top of the support plate 42 near the second frame 17. The position of the receiving part 53 corresponds to the third stop 22. like Figure 2 and Figure 3 As shown, the support beam 10 and other structures are located on one side of the second frame 17 during use. As explained above, the rods rolling down from the second inclined section 20 land on the first top seat 29, but the rods ultimately need to be placed on the respective support groove wheels 44. For example... Figure 3As shown, the receiving part 53 corresponds to the bottom of the second inclined part 20. The inclined surface of the second inclined part 20 and the inclined surface of the receiving part 53 form a flat slope. When the first telescopic device 30 drives the first top seat 29 to descend, the rod can roll over the fourth stop 28 onto the receiving part 53 and then roll from the receiving part 53 onto each support groove wheel 44. Thus, one operation of placing the rod on the support groove wheel 44 is completed. like Figure 2 As shown, in order to monitor whether the rod has moved to the preset position, a sensor 41 is also provided at one end of the support beam 10. The sensor 41 is mounted on the bracket 9. When the support wheel 44 drives the rod to move towards the bracket 9, it can be determined that the rod has moved to the preset position when one end of the rod contacts the sensor 41. At this time, the overhead crane 2 can be controlled to drive the hook 4 to lift the rod and place it on the top of the straightening machine for straightening.

[0033] Furthermore, after the rod is straightened on the straightening machine, it needs to be stored on the first placement beam 15 at the top of the first frame 16, such as... Figure 2 and Figure 3 As shown, the first placement beam 15 includes a first horizontal part 14 and an upwardly inclined first inclined part 13. The first horizontal part 14 is provided with a second stop 18 at one end away from the second frame 17. A support base 12 is installed on the step below the top of the first inclined part 13. A first stop 11 is provided at the end of the support base 12. There is a certain distance between the second top seat 34 and the end of the first inclined part 13. A second top seat 34 is provided on one side of the support base 12. A second guide shaft 32 is vertically installed at the bottom of the second top seat 34. At least one second guide seat 33 is movably sleeved on the second guide shaft 32. The second guide seat 33 is installed on the first frame 16. The bottom of each second guide shaft 32 is movably mounted with a fourth drive arm 37. It should be emphasized that, specifically, a strip-shaped opening (such as...) is provided at the end of the fourth drive arm 37 near one end. Figure 5 As indicated by arrow A, the slot at the bottom of the fourth drive arm 37 is identical to the slot at the bottom of the second drive arm 26. The bottom of the second guide shaft 32 has a U-shaped structure, which is connected to the slot via a shaft placed inside the slot. The other end of the fourth drive arm 37 is mounted on the third connecting shaft 31, which is located below the first inclined portion 13 and rotatably mounted on the first frame 16. A second telescopic device 35 is rotatably mounted below at least one first inclined portion 13. The bottom of the second telescopic device 35 is connected to one end of a third drive arm 36, and the other end of the third drive arm 36 is mounted on a third connecting shaft 31. When the second telescopic device 35 extends or retracts, the second telescopic device 35 can drive the third connecting shaft 31 to rotate through the third drive arm 36, so that the third connecting shaft 31 drives the second guide shaft 32 to extend and retract up and down in the second guide seat 33 through the fourth drive arm 37. In the initial state, the second top seat 34 is below the top surface of the support seat 12, and the top of the second top seat 34 is an inclined surface that is inclined towards the direction of the second top seat 34.

[0034] The above describes that after the straightening machine straightens the rod, it needs to be transported to the first placement beam 15. Specifically, the rod on the straightening machine is lifted by the hook 4 and then placed on each support seat 12. The first stop 11 can prevent the rod from falling off the support seat 12. When the hook 4 is removed, the second telescopic device 35 drives each second telescopic device 35 to lift up, thereby lifting the rod on the support seat 12 to above the first inclined part 13. Since the top of the second top seat 34 is an inclined surface, the rod will automatically roll onto the first inclined part 13 and then roll along the first inclined part 13 to the first horizontal part 14. Then the rod is blocked and limited by the second stop 18.

[0035] Based on the above embodiments, further optimizations can be made, such as... Figure 7 and Figure 8 As shown, the bottom of the connecting beam 52 is provided with at least one second support 50, which together with the first support 46 is supported on the ground, so that the connecting beam 52 has better support.

[0036] Based on the above embodiments, further optimization is possible. In practice, the loading and unloading device can be controlled by an automatic control system, such as the PLC control system most commonly used in industrial intelligent control, thereby automating the entire device.

[0037] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A loading and unloading device for a straightening machine, comprising a gantry crane (2), the gantry crane (2) traveling on both sides of a track (1), and a straightening machine (5) provided between the tracks (1), characterized in that, At least two vertically downward telescopic booms are installed below the overhead crane (2), and hooks (4) are installed below each telescopic boom. The straightening machine (5) has at least one second frame (17) on one side, and the top of the second frame (17) has multiple second placement beams (21) parallel to the track (1) for placing the rod to be straightened. The second frame (17) has at least one first frame (16) on the side away from the straightener (5). The top of the first frame (16) has multiple first placement beams (15) parallel to the track (1), which are used to place the rods straightened by the straightener (5).

2. The loading and unloading device for a straightening machine as described in claim 1, characterized in that, The telescopic boom includes a vertically downward support frame (3), the top of which is connected to the crane (2), and an installation plate (6) is provided at the bottom of the support frame (3). A third telescopic device (8) is vertically provided at the top of the installation plate (6). The free end of the third telescopic device (8) extends to the bottom of the mounting plate (6) and is connected to the hook (4). The top two sides of the hook (4) are provided with guide rods (7) parallel to the third telescopic device (8). The guide rods (7) are movably placed inside the mounting plate (6).

3. The loading and unloading device for a straightening machine as described in claim 2, characterized in that, The second placement beam (21) includes a second horizontal part (19) and a downwardly inclined second inclined part (20). The second horizontal part (19) has a third stop (22) at one end near the first frame (16). The second inclined part (20) is provided with a first top seat (29) on one side of its bottom. The first top seat (29) is provided with a fourth stop (28) at the end away from the third stop (22). The bottom of each first top seat (29) is vertically mounted with a first guide shaft (39). At least one first guide seat (27) is movably sleeved on the first guide shaft (39). The first guide seat (27) is connected to the second frame (17). The bottom of the first guide shaft (39) is movably mounted with the second drive arm (26), and the other end of the second drive arm (26) is mounted on the first connecting shaft (24). The first connecting shaft (24) is located below the second inclined part (20) and is rotatably connected to the second frame (17). A first telescopic device (30) is rotatably mounted below at least one second inclined portion (20). The bottom of the first telescopic device (30) is rotatably connected to one end of the first drive arm (23). The other end of the first drive arm (23) is fixed on the first connecting shaft (24). When the first telescopic device (30) extends or retracts, it can drive the first connecting shaft (24) to rotate. The first connecting shaft (24) can drive the first guide shaft (39) to extend or retract up and down in the first guide seat (27) through the second drive arm (26). In the initial state, the top of the first top seat (29) is located below the second inclined portion (20).

4. The loading and unloading device for a straightening machine as described in claim 3, characterized in that, A second connecting shaft (25) is provided parallel above the first connecting shaft (24), and the second connecting shaft (25) is rotatably connected to the second frame (17); A plurality of blocking arms (40) are mounted on the second connecting shaft (25), and a fourth telescopic device (38) is rotatably mounted in the middle of at least one blocking arm (40). The other end of the fourth telescopic device (38) is rotatably connected to the side of the second horizontal part (19). When the fourth telescopic device (38) extends or retracts, the fourth telescopic device (38) can drive the second connecting shaft (25) to rotate through the blocking arm (40), so that the top of the blocking arm (40) extends above the second inclined part (20) or retracts below the second inclined part (20).

5. The loading and unloading device for a straightening machine as described in claim 4, characterized in that, The second frame (17) has a support beam (10) on the side away from the first frame (16). Several support groove wheels (44) are rotatably installed on the top of the support beam (10). The support groove wheels (44) are driven to rotate by the drive device. A connecting beam (52) is provided parallel to the bottom of the support beam (10). The two ends of the connecting beam (52) are connected to the first support (46) respectively. In the initial state, the bottom of the support beam (10) is placed on the top of the first support (46). At least two screw jacks (47) and a reducer (49) are installed on the top of the connecting beam (52). A second motor (48) is installed on the input end of the reducer (49), and the reducer (49) and the screw jack (47) are connected by a connecting rod (51). When the second motor (48) drives the reducer (49) to rotate, the reducer (49) can synchronously drive each screw jack (47) to move synchronously through the connecting rod (51). The top of the screw jack (47) is connected to the bottom of the support beam (10), so that the screw jack (47) drives the support beam (10) to move up and down; The top of the support beam (10) is also provided with multiple support plates (42), which are distributed between the support groove wheels (44). The top of the support plate (42) away from the second frame (17) is provided with a fifth stop (43), and the top of the support plate (42) near the second frame (17) is provided with an inclined upward receiving part (53), which corresponds to the third stop (22). A sensor (41) is also provided at one end of the support beam (10), and the sensor (41) is mounted on the bracket (9).

6. The loading and unloading device for a straightening machine as described in any one of claims 1-5, characterized in that, The first placement beam (15) includes a first horizontal part (14) and an upwardly inclined first inclined part (13). The first horizontal part (14) has a second stop (18) at one end away from the second frame (17). A support seat (12) is installed on the step below the top of the first inclined part (13), and a first stop (11) is provided at the end of the support seat (12). Each side of the support base (12) is provided with a second top seat (34), and a second guide shaft (32) is vertically installed at the bottom of each second top seat (34). At least one second guide seat (33) is movably sleeved on the second guide shaft (32), and the second guide seat (33) is installed on the first frame (16). The bottom of the second guide shaft (32) is movably mounted with a fourth drive arm (37), and the other end of the fourth drive arm (37) is mounted on a third connecting shaft (31). The third connecting shaft (31) is located below the first inclined part (13) and is rotatably mounted on the first frame (16). A second telescopic device (35) is rotatably mounted below at least one first inclined portion (13). The bottom of the second telescopic device (35) is connected to one end of a third drive arm (36), and the other end of the third drive arm (36) is mounted on a third connecting shaft (31). When the second telescopic device (35) extends or retracts, the second telescopic device (35) can drive the third connecting shaft (31) to rotate through the third drive arm (36), so that the third connecting shaft (31) drives the second guide shaft (32) to extend and retract up and down in the second guide seat (33) through the fourth drive arm (37). In the initial state, the second top seat (34) stays below the top surface of the support seat (12).

7. The loading and unloading device for a straightening machine as described in claim 5, characterized in that, The drive device includes a first motor (45) located below one end of the support beam (10), and sprockets are provided on the shaft of the first motor (45) and one end of the support groove wheel (44), and the sprockets are connected by a chain.

8. The loading and unloading device for a straightening machine as described in claim 5, characterized in that, The bottom of the connecting beam (52) is provided with at least one second support (50).

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