A handling device for galvanized steel sheets

Abstract

This invention discloses a handling device for galvanized steel sheets, relating to the field of handling devices. It includes a main support frame, a gantry frame body mounted on top of the main support frame, a gantry crane trolley slidably mounted on the gantry frame body, and a handling and adsorption device driven by the gantry crane trolley. A collection platform and a pallet are provided on one side of the main support frame, with the pallet placed on top of the collection platform. Gear shafts are fitted around the four sides of the collection platform. This invention uses gear shafts and composite pressure plates to form meshing clamping plates. Subsequently, through the combination of four sets of meshing clamping plates with a spur gear plate, a transmission plate, and an electric cylinder to form a meshing transmission structure, it can synchronously clamp and center the galvanized steel sheets around their perimeter after the gantry crane trolley-driven handling and adsorption device lifts and stacks them. This ensures the stability of the stacked galvanized steel sheets during handling while reducing the probability of tipping over.

Description

Technical Field

[0001] This invention relates to the field of handling devices, and more particularly to a handling device for galvanized steel sheets. Background Technology

[0002] Existing galvanized steel sheets typically refer to welded steel sheets with a hot-dip galvanized or electro-galvanized layer on the surface. The galvanizing process can effectively prevent steel corrosion and extend the service life of steel. Therefore, it is now widely used in shipbuilding, home appliance manufacturing, and container manufacturing industries, and its application range is quite wide.

[0003] Currently, extra care must be taken when handling galvanized steel sheets during the production process, as damage to the galvanized layer during handling will reduce the service life and structural performance of the galvanized steel sheets. Therefore, to improve efficiency and avoid collisions caused by manual handling, existing technologies mostly use forklifts, overhead cranes, and other methods to replace manual handling.

[0004] However, during the actual operation, the applicant found that although the above-mentioned automated handling equipment could automatically lift and stack the galvanized steel sheets that were initially stacked, the stacking accuracy was difficult to guarantee. As a result, the probability of tipping over increased during subsequent handling. At the same time, in order to avoid tilting, the entire sheet was forcefully pushed to be centered, which caused friction damage to the surface of the galvanized steel sheet. Summary of the Invention

[0005] This application proposes a handling device for galvanized steel sheets, which has the advantages of automatically clamping and centering the galvanized steel sheets during stacking, ensuring the stability of the stacked galvanized steel sheets during handling, and solving the technical problems mentioned in the background art.

[0006] To achieve the above objectives, this application adopts the following technical solution: a handling device for galvanized steel sheets, including a main support frame, a gantry frame body installed on the top of the main support frame, a gantry crane trolley slidably installed on the gantry frame body, a handling adsorption device being drivenly connected to the gantry crane trolley, and a collection platform and a pallet provided inside one side of the main support frame, with the pallet placed on top of the collection platform;

[0007] The collection platform is equipped with gear shafts on all four sides. The two ends of the gear shafts are respectively connected to composite pressure plates and meshing straight tooth plates. An electric cylinder and a transmission plate are installed inside the bottom of the collection platform. The output end of the electric cylinder is connected to the middle of the transmission plate. The bottom of the straight tooth plate is fixed to the corresponding corner structure of the transmission plate. The gear shafts drive the composite pressure plates to rotate synchronously under the transmission of the electric cylinder through the combination formed by the transmission plate and the straight tooth plate, so that the two composite pressure plates in relative positions can clamp and center the top space of the pallet.

[0008] Preferably, the top four sides of the collection platform are fixed with support sleeves, and the inner side of the middle of the support sleeve is fitted to one end of the gear shaft through a bearing. A transition rod is installed between the bottom of the composite pressure plate and the surface of one end of the gear shaft, and there is a clearance between the transition rod and the support sleeve.

[0009] Preferably, a second torsion spring is fitted on one end of the gear shaft. The two ends of the second torsion spring are respectively fixed to the surface of the transition rod and the end face of the support sleeve. The uncompressed second torsion spring can elastically pull one end of the top of the composite pressure plate toward the bottom structure of the collection platform and be coplanar with the bottom structure of the collection platform.

[0010] Preferably, reinforcing rods are snapped onto both the front and rear ends of the transmission plate, and the reinforcing rods are fixedly sleeved inside the collection platform. The electric cylinder is electrically connected to a stroke control module, which includes a motion controller, a feedback sensor, and a communication and I / O interface.

[0011] Preferably, the composite pressure plate includes a first pressure plate and a second pressure plate. An L-shaped rod is fixed to the bottom side of the second pressure plate. A pin is snapped into the top inner side of the first pressure plate and fixed to the bottom end of the L-shaped rod. The second pressure plate can be rotated and adjusted away from the top of the first pressure plate from the collection platform under the support of the combination formed by the L-shaped rod and the first torsion spring.

[0012] A first torsion spring is fitted on the outer side of the pin end. The two ends of the first torsion spring are respectively fixed to the corresponding side surface of the first pressure plate and the bottom end of the corresponding L-shaped rod. The non-compressed first torsion spring can elastically pull the second pressure plate to keep it parallel to the first pressure plate.

[0013] Preferably, the straight toothed plate is arranged parallel to the outer surface of the main support frame, and an auxiliary bracket fitted on the outer side of the electric cylinder housing is fixedly sleeved on the inner bottom side of the main support frame.

[0014] Preferably, a first limiting electromagnet is nested in the middle of the first pressure plate, and the magnetic attraction surface of the first limiting electromagnet can be attached to the bottom surface of the second pressure plate. The two ends of the transition rod are respectively fixed to the bottom surface of the first pressure plate and the end surface of one end of the gear shaft.

[0015] Preferably, the top of the main support frame is fitted with an anti-detachment component, which includes a limiting bracket. The front and rear ends of the bottom of the limiting bracket are fitted with adjusting plates through bearings. The front and rear ends of one side of the bottom of the limiting bracket are equipped with motor assemblies. The output structure of the motor assembly is connected to one end of the corresponding pin shaft. The adjusting plate can be vertically retracted or horizontally expanded inside the bottom of the limiting bracket under the transmission of the motor assembly through the pin shaft.

[0016] Preferably, curved frames are fixed to the surfaces of both adjustment plates, and the two curved frames are aligned front to back to form a conical channel. Several friction-reducing rollers are movably sleeved on the curved frames along their own structure, and the distance between two adjacent friction-reducing rollers is equal to the width of the galvanized steel plate placed on top of the pallet.

[0017] Preferably, the motor assembly includes an outer support cylinder and a brake servo motor. The brake servo motor is fitted inside the outer support cylinder, and the two ends of the outer support cylinder are respectively fixed to the surface of the corresponding structure at the bottom of the limiting bracket and configured as an open port structure. The output end of the brake servo motor is connected to one end of the corresponding pin shaft for transmission.

[0018] Preferably, the other end of the pins fitted inside the two adjustment plates passes through the bottom structure of the limiting bracket and is fixed with an iron T-shaped rod on the same central axis. The other side of the bottom of the anti-detachment component is fixedly connected to a second limiting electromagnet at both the front and rear ends. The magnetic surface of the second limiting electromagnet can be magnetically connected to one end face of the corresponding iron T-shaped rod.

[0019] Preferably, the transport and adsorption device specifically adopts an electromagnetic chuck device, and the transport and adsorption device is provided with a magnetic force adjustment module, which includes a power switch device, a switch drive circuit, a current detection element, a controller, and a protection circuit.

[0020] Preferably, the pallet is made of metal material, and the pallet has insertion slots on both sides and the front and rear ends, and the length and width of the galvanized steel plate are greater than the length and width of the pallet.

[0021] In summary, the present invention has the following beneficial effects:

[0022] 1. This invention uses gear shafts and composite pressure plates to form meshing clamping plates. Subsequently, after the meshing transmission structure formed by the four sets of meshing clamping plates, straight gear plates, transmission plates, and electric cylinders is used, it can simultaneously clamp and center the galvanized steel plates around the perimeter after the gantry crane pulley transmission transport and adsorption device lifts and stacks the galvanized steel plates. This ensures the stability of the stacked galvanized steel plates during the transport process and also reduces the probability of tipping over.

[0023] 2. The composite pressure plate set in this invention can be a composite structure composed of a first pressure plate, a second pressure plate, and related structures. In subsequent extended use, it can adaptively clamp and center the galvanized steel plate by first buffering and then forcing it to center when the galvanized steel plate has a large deviation in its placement position. This ensures that the plate has the ability to flip and make room, thus preventing the structure from being damaged by hard impact.

[0024] 3. The anti-detachment component set in this invention serves as a pre-treatment condition. The two adjustment plates inside can be vertically retracted or horizontally expanded within the bottom sides of the limiting bracket under the transmission of the corresponding motor components via pin shafts. This protects the displacement trajectory of the galvanized steel plate without interfering with its movement and handling, reducing damage caused by the galvanized steel plate accidentally detaching from the bottom of the handling and adsorption device. Attached Figure Description

[0025] Figure 1 This is a front view schematic diagram of the present invention;

[0026] Figure 2 This is a three-dimensional schematic diagram of the main support frame of the present invention;

[0027] Figure 3 This is a three-dimensional schematic diagram of the collection platform of the present invention;

[0028] Figure 4 This is an enlarged schematic diagram of the gear shaft component of the present invention;

[0029] Figure 5 This is an enlarged schematic diagram of the pressure sensor of the present invention;

[0030] Figure 6 This is a top view of the anti-detachment component of the present invention;

[0031] Figure 7 This is a right-side view of the anti-detachment component of the present invention.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1. Main support frame; 2. Gantry frame body; 3. Gantry crane trolley; 4. Handling and adsorption device; 5. Collection platform; 6. Pallet; 7. Gear shaft; 8. Composite pressure plate; 81. First pressure plate; 82. Second pressure plate; 83. L-shaped rod; 84. First torsion spring; 85. First limit electromagnet; 9. Straight tooth plate; 10. Electric cylinder; 11. Transmission plate; 12. Anti-detachment component; 121. Limit bracket; 122. Adjusting plate; 123. Curved frame; 124. Friction-reducing roller; 125. Motor assembly; 13. Support sleeve; 14. Reinforcing rod; 15. Galvanized steel plate; 16. Iron T-shaped rod; 17. Second limit electromagnet; 18. Second torsion spring. Detailed Implementation

[0034] The technical solution of the present invention will be clearly and completely described below with reference to preferred embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] like Figures 1-4 A handling device for galvanized steel sheets includes a main support frame 1, a gantry frame body 2 installed on the top of the main support frame 1, a gantry crane trolley 3 slidably installed on the gantry frame body 2, a handling adsorption device 4 connected to the gantry crane trolley 3, and a collection platform 5 and a pallet 6 provided on one side of the main support frame 1, with the pallet 6 placed on top of the collection platform 5.

[0036] Gear shafts 7 are fitted around the sides of the collection platform 5. One end of the gear shaft 7 is connected to a composite pressure plate 8, and the other end is meshed with a straight tooth plate 9. Support sleeves 13 are fixed around the top of the collection platform 5. The inner side of the middle of the support sleeve 13 is fitted to one end of the gear shaft 7 through a bearing. The combination of the support sleeve 13 and the bearing ensures the stability of the gear shaft 7 during subsequent reciprocating rotation. A transition rod is installed between the bottom of the composite pressure plate 8 and the surface of one end of the gear shaft 7. There is a clearance between the transition rod and the support sleeve 13. This ensures that the fixed connection strength between the gear shaft 7 and the composite pressure plate 8 will not cause structural interference with the support sleeve 13, and ensures the reliability and smoothness of the subsequent reciprocating rotation operation of the gear shaft 7 and the composite pressure plate 8.

[0037] The bottom of the collection platform 5 is fitted with an electric cylinder 10 and a transmission plate 11. The output end of the electric cylinder 10 is connected to the middle of the transmission plate 11. The bottom of the spur gear 9 is fixed on the corresponding corner structure of the transmission plate 11. The gear shaft 7 drives the composite pressure plate 8 to rotate synchronously under the transmission of the electric cylinder 10 through the combination formed by the transmission plate 11 and the spur gear 9, so that the two composite pressure plates 8 in relative positions can clamp and center the top space of the pallet 6. The spur gear 9 is set parallel to the outer surface of the main support frame 1. An auxiliary bracket fitted on the outside of the housing of the electric cylinder 10 is fixedly sleeved on the inner bottom of the main support frame 1.

[0038] A second torsion spring 18 is fitted on one end of the gear shaft 7. The two ends of the second torsion spring 18 are fixed to the surface of the transition rod and the corresponding end face of the support sleeve 13, respectively. The non-compressed second torsion spring 18 can elastically pull one end of the top of the composite pressure plate 8 to tilt towards the bottom structure of the collection platform 5 and be coplanar with the bottom structure of the collection platform 5. This satisfies the clearance space requirement in the subsequent material collection process using the existing forklift, and thus avoids structural interference while maintaining the continuous use of the gear shaft 7 and the composite pressure plate 8.

[0039] Reinforcing rods 14 are snapped onto both the front and rear ends of the transmission plate 11, and the reinforcing rods 14 are fixedly sleeved inside the collection platform 5. Thus, the reinforcing rods 14 ensure the stability and structural transmission strength of the transmission plate 11 during subsequent reciprocating rotation operations, and enhance the structural compressive strength of the transmission plate 11. The electric cylinder 10 is electrically connected to a stroke control module, which includes a motion controller, a feedback sensor, and a communication and I / O interface. This enables the electric cylinder 10 to drive the transmission plate 11 and related structures to perform multi-stage transmission operations.

[0040] The pallet 6 is made of metal, and the pallet 6 has insertion slots on both sides and at the front and rear ends. The length and width of the galvanized steel plate 15 are both greater than the length and width of the pallet 6.

[0041] In use, the output end of the electric cylinder 10 drives the straight tooth plate 9 in three stages. In the first stage, it is completely closed. The output end of the electric cylinder 10 drives the straight tooth plate 9 to move down to the initial state. At this time, the straight tooth plate 9 is completely disengaged from the gear shaft 7. At the same time, the composite pressure plate 8 flips under the elastic traction of the second torsion spring 18. The top end of the composite pressure plate 8 originally faces the bottom of the collection platform 5 and is coplanar with the bottom structure of the collection platform 5.

[0042] In the second stage, the central transmission, that is, the output end of the electric cylinder 10 drives the straight tooth plate 9 to mesh with the transmission gear shaft 7, so that the corresponding composite pressure plate 8 is in a tilted and yielding state relative to the collection platform 5 and is maintained thereafter. In this way, the centering and clamping time is reduced without interfering with the subsequent material handling and unloading process, thus improving the work efficiency.

[0043] In the third stage, top drive, the gantry crane trolley 3, supported by the gantry frame body 2, drives the lifting and transporting adsorption device 4 to adsorb the target galvanized steel plate 15 and move synchronously until the galvanized steel plate 15 is initially aligned with the pallet 6 placed on the top of the collection platform 5. Then, the gantry crane trolley 3 is controlled to move the transporting adsorption device 4 and the galvanized steel plate 15 adsorbed by the transporting adsorption device 4 downwards until the galvanized steel plate 15 is placed on the top of the pallet 6. After completion, the transporting adsorption device 4 is disengaged from the galvanized steel plate 15, and the gantry crane trolley 3 drives the transporting adsorption device 4 to reset for the next cycle of material conveying.

[0044] For the galvanized steel plate 15 placed on top of the pallet 6, in order to ensure the alignment accuracy during the subsequent repeated stacking process, the electric cylinder 10 is activated. The output end of the electric cylinder 10 further drives the transmission plate 11 and the four straight tooth plates 9, which in turn cause the four straight tooth plates 9 to mesh synchronously and drive their respective gear shafts 7. Finally, the two composite pressure plates 8 in relative positions clamp and center the galvanized steel plate 15 placed on top of the pallet 6. After completion, the electric cylinder 10 drives the gear shafts 7 and the composite pressure plates 8 to reset through the straight tooth plates 9, which fully ensures the positional accuracy of the galvanized steel plate 15 in the subsequent stacking. Similarly, the galvanized steel plates 15 that are subsequently transported to the top of the pallet 6 are all aligned in the same way as above, which fully ensures the alignment accuracy of the stacked multiple galvanized steel plates 15 and improves the reliability of the subsequent handling process.

[0045] Once the stacked galvanized steel plates 15 reach the standard for one-time handling, the output end of the electric cylinder 10 drives the straight tooth plate 9 to move down to the initial state. At this time, the straight tooth plate 9 is completely disengaged from the gear shaft 7. At the same time, the composite pressure plate 8 flips under the elastic pull of the second torsion spring 18. The top end of the composite pressure plate 8 originally faces the bottom of the collection platform 5 and is coplanar with the bottom structure of the collection platform 5. Then, a forklift is used to automatically transport the pallet 6 and the galvanized steel plates 15 stacked on top of the pallet 6.

[0046] like Figures 1-5 The composite pressure plate 8 includes a first pressure plate 81 and a second pressure plate 82. An L-shaped rod 83 is fixed to the bottom side of the second pressure plate 82. A pin is snapped into the top inner side of the first pressure plate 81 and fixed to the bottom end of the L-shaped rod 83. The second pressure plate 82 can be flipped away from the top of the first pressure plate 81 under the support of the combination formed by the L-shaped rod 83 and the first torsion spring 84. This provides a flipping buffer when the galvanized steel plate 15 is placed in a large position, and avoids damage to the structure due to hard impact.

[0047] A first torsion spring 84 is fitted on the outer side of the pin end. The two ends of the first torsion spring 84 are respectively fixed to the corresponding side surface of the first pressure plate 81 and the bottom end of the corresponding L-shaped rod 83. The non-compressed first torsion spring 84 can elastically pull the second pressure plate 82 to keep it parallel to the first pressure plate 81. The first torsion spring 84 provides the reset power for the second pressure plate 82 to make way and flip, which fully improves the flexibility of the first pressure plate 81 and the second pressure plate 82 during use.

[0048] The first pressure plate 81 has a first limiting electromagnet 85 nested in the middle. The magnetic surface of the first limiting electromagnet 85 can be attached to the bottom surface of the second pressure plate 82, thereby maintaining the structural strength and force strength during the overall centering and clamping process of the first pressure plate 81 and the second pressure plate 82. The two ends of the transition rod are respectively fixed to the bottom surface of the first pressure plate 81 and the end surface of one end of the gear shaft 7 to avoid structural interference.

[0049] When using this equipment, considering the significant deviation in the stacking position of the 15 galvanized steel sheets, a two-step clamping and centering method will be adopted, as follows:

[0050] In the first step, the first limit electromagnet 85 is in the closed state. For the galvanized steel plate 15 placed on top of the pallet 6, in order to ensure the alignment accuracy in the subsequent repeated stacking process, the electric cylinder 10 is activated. The output end of the electric cylinder 10 further drives the transmission plate 11 and the four straight tooth plates 9, which then make the four straight tooth plates 9 mesh synchronously to drive their respective corresponding gear shafts 7. Finally, the two composite pressure plates 8 in relative positions clamp and center the galvanized steel plate 15 placed on top of the pallet 6. If the placement deviation of the galvanized steel plate 15 is large at this time, the second pressure plate 82 will be buffered and flipped to press down during the top pressing alignment process with the assistance of its corresponding first torsion spring 84, and perform preliminary top pressing alignment of the galvanized steel plate 15 to reduce the probability of damage to the second pressure plate 82. Then, the electric cylinder 10 drives the gear shafts 7 and the composite pressure plate 8 to reset through the straight tooth plates 9.

[0051] The second step involves activating the first limiting electromagnet 85, which magnetically attracts the second pressure plate 82, forming an integral structure with the first pressure plate 81. The electric cylinder 10 is then activated, and its output further drives the transmission plate 11 and four straight gear plates 9. These four straight gear plates 9 then synchronously mesh with their corresponding gear shafts 7. Finally, the two composite pressure plates 8, positioned relative to each other, clamp and center the galvanized steel plate 15 placed on top of the pallet 6. At this point, the first pressure plate 81 and the second pressure plate 82 form an integral structure, providing rigid pressure to center the galvanized steel plate 15, ensuring its placement accuracy on top of the pallet 6. Afterward, the electric cylinder 10 resets the gear shafts 7 and composite pressure plates 8 via the straight gear plates 9.

[0052] like Figure 1 , Figures 6-7 The top of the main support frame 1 is fitted with an anti-detachment component 12, which includes a limiting bracket 121. The front and rear ends of the bottom of the limiting bracket 121 are fitted with adjusting plates 122 through bearings. The front and rear ends of one side of the bottom of the limiting bracket 121 are equipped with motor assemblies 125. The output structure of the motor assembly 125 is connected to one end of the corresponding pin shaft. Under the transmission of the motor assembly 125 through the pin shaft, the adjusting plate 122 can be vertically stored or horizontally expanded in the bottom of the limiting bracket 121. Thus, without interfering with the movement and transportation of the galvanized steel plate 15, the displacement trajectory of the galvanized steel plate 15 is shielded and protected, reducing the damage caused by the galvanized steel plate 15 accidentally detaching from the bottom of the transport and adsorption device 4.

[0053] The motor assembly 125 includes an outer support cylinder and a brake servo motor. The brake servo motor is installed inside the outer support cylinder, and the two ends of the outer support cylinder are respectively fixed to the surface of the corresponding structure at the bottom of the limit bracket 121 and are set as an open port structure to provide heat dissipation channels. The output end of the brake servo motor is connected to one end of the corresponding pin shaft for transmission.

[0054] During use, considering the possibility of the galvanized steel plate 15 accidentally falling off, when the gantry crane trolley 3 transmission conveying adsorption device 4 and the galvanized steel plate 15 are horizontally displaced at a higher position, the brake servo motor in the two motor assemblies 125 is activated. The output end of the brake servo motor drives the corresponding pin shaft, which in turn drives the two pin shafts to drive their respective adjusting plates 122 to expand horizontally. Thus, the two adjusting plates 122 in the relative position will form a shielding and protective structure on the horizontal displacement track of the galvanized steel plate 15. Even if the galvanized steel plate 15 accidentally falls off the conveying adsorption device 4, the two adjusting plates 122 can shield and support it, reducing the probability of accidents.

[0055] like Figure 1 , Figures 6-7 Both adjustment plates 122 have curved frames 123 fixed on their surfaces, and the two curved frames 123 are aligned front to back to form a conical channel. Several friction-reducing rollers 124 are movably sleeved on the curved frame 123 along its own structure, and the distance between two adjacent friction-reducing rollers 124 is equal to the width of the galvanized steel plate 15 placed on top of the pallet 6.

[0056] In use, considering the need for the galvanized steel plate 15 to be aligned with the pallet 6 during the initial hoisting and handling, the conical channel formed by the two curved frames 123 is used to adsorb the galvanized steel plate 15 being transported by the adsorption device 4. The galvanized steel plate 15, which is displaced by the gantry crane trolley 3, gradually contracts and limits its position, thereby improving the efficiency of the subsequent alignment of the galvanized steel plate 15 with the pallet 6 and further optimizing the operation effect of transporting and stacking the galvanized steel plate 15.

[0057] like Figure 1 , Figures 6-7 The other end of the pins fitted inside the two adjusting plates 122 passes through the bottom structure of the limiting bracket 121 and is fixed with iron T-shaped rods 16 on the same central axis. The front and rear ends of the other side of the bottom of the anti-detachment component 12 are fixedly connected with second limiting electromagnets 17. The magnetic surface of the second limiting electromagnet 17 can be magnetically connected to one end face of the corresponding iron T-shaped rod 16.

[0058] In use, considering the support strength of the adjustment plate 122 after flipping and adjustment, the second limit electromagnet 17 and the iron T-shaped rod 16 are repeatedly opened before and after the adjustment plate 122 is flipped, thereby magnetically limiting the adjustment plate 122 and ensuring the reliability and stability of the adjustment plate 122 in subsequent use.

[0059] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention. The invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A handling device for galvanized steel sheets, comprising a main support frame (1), a gantry frame body (2) mounted on top of the main support frame (1), a gantry crane trolley (3) slidably mounted on the gantry frame body (2), and a handling adsorption device (4) drivingly connected to the gantry crane trolley (3), characterized in that: The main support frame (1) is provided with a collection platform (5) and a pallet (6) on one side. The pallet (6) is placed on the top of the collection platform (5). Gear shafts (7) are fitted on all sides of the collection platform (5). The two ends of the gear shafts (7) are respectively connected to a composite pressure plate (8) and a straight tooth plate (9) for meshing transmission. An electric cylinder (10) and a transmission plate (11) are fitted inside the bottom of the collection platform (5). The output end of the electric cylinder (10) is connected to the middle of the transmission plate (11). The bottom of the straight tooth plate (9) is fixed on the corresponding corner structure of the transmission plate (11). The gear shaft (7) drives the composite pressure plate (8) to rotate synchronously under the transmission of the electric cylinder (10) through the combination formed by the transmission plate (11) and the straight tooth plate (9), so that the two composite pressure plates (8) in the relative position can clamp and center the top space of the pallet (6).

2. The conveying device for galvanized steel sheets according to claim 1, characterized in that: The top four sides of the collection platform (5) are all fixed with support sleeves (13). The inner side of the middle of the support sleeve (13) is fitted with one end of the gear shaft (7) through a bearing. A transition rod is installed between the bottom of the composite pressure plate (8) and the surface of one end of the gear shaft (7), and there is a clearance between the transition rod and the support sleeve (13).

3. The conveying device for galvanized steel sheets according to claim 2, characterized in that: One end of the gear shaft (7) is fitted with a second torsion spring (18). The two ends of the second torsion spring (18) are respectively fixed to the surface of the transition rod and the end face of the support sleeve (13). The non-compressed second torsion spring (18) can elastically pull the top end of the composite pressure plate (8) towards the bottom structure of the collection platform (5) and be coplanar with the bottom structure of the collection platform (5).

4. A handling device for galvanized steel sheets according to claim 2, characterized in that: The composite pressure plate (8) includes a first pressure plate (81) and a second pressure plate (82). An L-shaped rod (83) is fixed to the bottom side of the second pressure plate (82). A pin is snapped into the top inner side of the first pressure plate (81) and fixed to the bottom end of the L-shaped rod (83). The second pressure plate (82) can be rotated away from the top of the first pressure plate (81) and adjusted away from the collection platform (5) under the support of the combination formed by the L-shaped rod (83) and the first torsion spring (84).

5. A handling device for galvanized steel sheets according to claim 4, characterized in that: A first torsion spring (84) is fitted on the outer side of the pin. The two ends of the first torsion spring (84) are respectively fixed to the corresponding side surface of the first pressure plate (81) and the bottom end of the corresponding L-shaped rod (83). The non-pressurized first torsion spring (84) can elastically pull the second pressure plate (82) to keep it parallel to the first pressure plate (81).

6. A handling device for galvanized steel sheets according to claim 4, characterized in that: The first pressure plate (81) has a first limiting electromagnet (85) nested in the middle. The magnetic surface of the first limiting electromagnet (85) can be attached to the bottom surface of the second pressure plate (82). The two ends of the transition rod are respectively fixed to the bottom surface of the first pressure plate (81) and the end surface of one end of the gear shaft (7).

7. A handling device for galvanized steel sheets according to claim 1, characterized in that: The top of the main support frame (1) is fitted with an anti-detachment component (12). The anti-detachment component (12) includes a limiting bracket (121). The front and rear ends of the bottom of the limiting bracket (121) are fitted with adjusting plates (122) through bearings. The front and rear ends of one side of the bottom of the limiting bracket (121) are equipped with motor assemblies (125). The output structure of the motor assembly (125) is connected to one end of the corresponding pin shaft. The adjusting plate (122) can be vertically stored or horizontally expanded in the bottom of the limiting bracket (121) under the transmission of the motor assembly (125) through the pin shaft.

8. A handling device for galvanized steel sheets according to claim 7, characterized in that: Both of the adjustment plates (122) have curved frames (123) fixed on their surfaces, and the two curved frames (123) are aligned front to back to form a conical channel. The curved frame (123) has several friction-reducing rollers (124) that are movably connected to it laterally along its own structure. The distance between two adjacent friction-reducing rollers (124) is equal to the width of the galvanized steel plate (15) placed on top of the pallet (6).

9. A handling device for galvanized steel sheets according to claim 7, characterized in that: The motor assembly (125) includes an outer support cylinder and a brake servo motor. The brake servo motor is fitted inside the outer support cylinder, and the two ends of the outer support cylinder are respectively fixed to the surface of the corresponding structure at the bottom of the limit bracket (121) and set as an open port structure. The output end of the brake servo motor is connected to one end of the corresponding pin shaft for transmission.

10. A handling device for galvanized steel sheets according to claim 1, characterized in that: The transport and adsorption device (4) specifically adopts an electromagnetic chuck device, and a magnetic force adjustment module is provided inside the transport and adsorption device (4). The magnetic force adjustment module includes a power switch device, a switch drive circuit, a current detection element, a controller, and a protection circuit.

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