Container spreader positioning device

Abstract

The utility model discloses a container lifting appliance positioning device belongs to lifting appliance positioning technical field. Its technical scheme is, a kind of container lifting appliance positioning device, including the upper positioning component and lower positioning component that can mutually butt joint, lower positioning component includes conical head, the small diameter end of conical head is located above the large diameter end, and the support rod is connected in the large diameter end of conical head, and the movable taper block is slidably arranged on support rod, and the small diameter end of movable taper block is located below the large diameter end, and the end face above the large diameter end of movable taper block is equipped with guide conical surface, and the tip of guide conical surface is higher than movable taper block;Upper positioning component includes lifting cylinder, and the sliding slot that is communicated with insertion slot is set in lifting cylinder side wall, and the limiting component is slidably arranged in sliding slot. The scheme in the descending process of lifting appliance, by the guiding effect of conical head, make it insert insertion slot in the bottom of lifting cylinder, realize active guiding positioning, by the rigid cooperation of limiting component and the bottom of conical head, the weight of container can be assisted to bear.

Description

Technical Field

[0001] This utility model relates to the field of spreader positioning technology, and in particular to a container spreader positioning device. Background Technology

[0002] In the shipping industry, containers are a common means of transportation. When containers are collected, distributed, loaded, and unloaded at ports, they are usually lifted by cranes. The crane's lifting cable is equipped with a special spreading tool at the lower end, and there are matching structures at the four corners of the container that are compatible with the spreading tool. The two can automatically lock and release to achieve the lifting of the container.

[0003] Cranes are often connected to spreaders via steel cables. During the operation and rotation of the crane, swaying is inevitable, making it difficult for the spreader to be accurately aligned vertically with the mating structure. This results in positioning deviations of the spreader, which are prone to impact and vibration upon contact with the container, requiring long-term calibration.

[0004] In response, patent document CN214003780U discloses a container spreader positioning device, which sets the spreader as a floating structure and uses elastic springs and piston rods to buffer the vibration when the spreader contacts the container, thereby assisting in the positioning of the spreader.

[0005] However, this solution involves passive buffering and adjustment after the spreader contacts the container, which still requires a relatively long adjustment time and affects the efficiency of grabbing and releasing. Summary of the Invention

[0006] This invention addresses the problem of long alignment and positioning time when container spreaders grab containers by providing a container spreader positioning device that can actively guide the position.

[0007] To solve the above problems, the technical solution adopted by this utility model is as follows: a container spreader positioning device, including an upper positioning component and a lower positioning component that can be docked with each other. The lower positioning component includes a conical head, with the small-diameter end of the conical head located above the large-diameter end. A support rod is connected to the large-diameter end of the conical head, and a base plate is provided at the lower end of the support rod. A movable cone block is slidably arranged on the support rod, with the small-diameter end of the movable cone block located below the large-diameter end. A guide cone surface is provided above the end face of the large-diameter end of the movable cone block, and the tip of the guide cone surface is higher than the movable cone block. The upper positioning component includes a lifting cylinder, with the upper end of the lifting cylinder being closed. The inner cavity of the lifting cylinder forms a downward-opening slot. A sliding groove communicating with the slot is opened in the side wall of the lifting cylinder. A limit component is slidably arranged in the sliding groove, and the front end of the limit component is located between the conical head and the movable cone block. During the descent of the spreader, the conical head guides it into the slot at the bottom of the boom, achieving active guidance and positioning. Simultaneously, the rigid fit between the limiting component and the bottom surface of the conical head serves as an auxiliary load-bearing point for the spreader, supporting the weight of the container. When unlocking is required, the spreader moves downwards, and the guide cone allows the front end of the limiting component to pass over the movable cone. Then, the spreader is lifted, causing the movable cone to move upwards. When the movable cone comes into contact with the conical head, the limiting component unlocks by passing over the conical head through the lower conical surface of the movable cone. The operation is smooth and convenient.

[0008] In a preferred embodiment of a container spreader positioning device, the base plate is provided with fixing screws for connecting the container, and a washer for supporting the movable cone is fixedly connected to the support rod. The thickness of the washer is greater than the thickness of the bolt head of the fixing screw. The washer is fixed to the support rod, and its top surface directly supports the movable cone, providing an initial support position for the movable cone and limiting its downward movement distance in the non-working state. The thickness of the washer is greater than the thickness of the bolt head of the fixing screw, which can prevent the bolt head from protruding from the top surface of the base plate and interfering with the sliding or initial positioning of the movable cone.

[0009] As a preferred embodiment of a container spreader positioning device, the limiting component includes a movable clamping block. The front end of the movable clamping block has a downward-facing inclined surface, and the rear end is fixedly connected to a connecting rod. A sealing plate is provided at one end of the slide groove located on the outer periphery of the lifting cylinder. The connecting rod passes through the sealing plate, and a spring is sleeved on the connecting rod. The two ends of the spring abut against the movable clamping block and the sealing plate, respectively. When the lifting cylinder descends, the conical surface of the conical head contacts and compresses the inclined surface of the movable clamping block, pushing the movable clamping block to slide outward along the slide groove while simultaneously compressing the spring. When the movable clamping block passes the conical head, the spring force is released, pushing the movable clamping block to reset and engage with the gap between the conical head and the movable clamping block, achieving clamping and positioning. This enables automatic reset and retraction of the movable clamping block without the need for an additional drive mechanism, simplifying the structure. The inclined surface design makes the contact force between the movable clamping block and the conical head and guide conical surface smoother, avoiding jamming. The overall structure achieves mechanical linkage between clamping and unlocking, with smooth operation, significantly improving the efficiency of spreader gripping and releasing.

[0010] As a preferred embodiment of the container spreader positioning device, a limit ring is fixedly provided on the outer periphery of the end of the connecting rod extending out of the sealing plate. This limits the range of movement of the connecting rod and prevents the limit component from disengaging inward when not in operation.

[0011] As a preferred embodiment of a container spreader positioning device, the slope of the inclined surface is the same as the generatrix slope of the conical head, but less than the slope of the guide cone surface. The slope of the inclined surface matches the generatrix slope of the conical head, ensuring surface contact and dispersing the compressive force. The slope of the inclined surface is less than the slope of the guide cone surface; after the force exerted by the guide cone surface on the inclined surface is decomposed, the component force along the slide direction is smaller, increasing the unlocking resistance and simultaneously increasing the downward stroke required for unlocking, thus preventing grabbing failure due to excessive downward movement of the spreader during grabbing.

[0012] As a preferred embodiment of a container spreader positioning device, a slot is formed at the center of the upper end face of the conical head, a lower magnetic attraction component is disposed within the slot, and an upper magnetic attraction component is disposed within the lifting cylinder. The lower and upper magnetic attraction components attract each other. Before the conical head is inserted, the spreader and the lower positioning component are actively guided and positioned, changing the traditional passive buffer adjustment mode, significantly shortening the alignment and calibration time; reducing the impact of spreader sway on positioning, improving docking accuracy, reducing impact vibration during contact, and protecting the equipment and container.

[0013] In a preferred embodiment of a container spreader positioning device, the slot extends into the support rod. The lower magnetic attraction assembly includes a gas spring. The moving end of the gas spring is upwardly positioned and movably connected to a push rod. An upper magnet fixing seat is fixedly connected to the upper end of the push rod. A first magnet is installed at the center of the top surface of the upper magnet fixing seat, and the first magnet can engage with the upper magnetic attraction assembly. When passing through the gas spring, the first magnet is higher than the upper end face of the conical head, and is inserted into the lifting cylinder in advance to attract the upper magnetic attraction assembly. After the conical head is inserted, it retracts. At the same time, the gas spring can take into account both elastic yielding and motion guidance, improving guidance accuracy.

[0014] As a preferred implementation of a container spreader positioning device, the upper magnetic attraction assembly includes a lower magnet fixing seat fixedly connected to the upper end of the slot, and a second magnet is installed at the center of the bottom surface of the lower magnet fixing seat, the second magnet being able to attract the first magnet.

[0015] As a preferred embodiment of a container spreader positioning device, the top surface of the slot cavity is further provided with a guide sleeve, and the guide sleeve has a tapered inclined surface inside. The small-diameter end of the tapered inclined surface is located above the large-diameter end, and the second magnet is located at the center of the small-diameter end of the tapered inclined surface. The tapered inclined surface compensates for the insufficient correction of small offsets by magnetic attraction, achieving precise alignment of the first and second magnets, further improving the docking accuracy between the spreader and the lower positioning assembly; the guiding process is smooth and impact-free, reducing magnet collision wear and extending the service life of the magnetic attraction assembly.

[0016] As can be seen from the above technical solution, the beneficial effects of this utility model are as follows: This solution achieves active positioning through the cooperation of upper and lower positioning components and the guiding effect of the conical head, changing the traditional passive buffer adjustment mode, significantly shortening the alignment and calibration time. At the same time, the rigid cooperation between the limiting component and the conical head can serve as an auxiliary force point to bear the weight of the container, making clamping and unlocking operations smooth and convenient. The fixing screws on the base plate ensure a firm connection between the lower positioning component and the container, avoiding positioning failure or safety hazards caused by loosening. The washer ring can support the movable cone block, shorten the docking adjustment stroke, and its thickness design can avoid the bolt head interfering with the movement of the movable cone block, ensuring smooth operation. The elastic extension and contraction of the spring in the limiting component enables the movable clamping block to automatically reset and retract, eliminating the need for an additional drive mechanism, simplifying the structure. The inclined surface design makes the contact force smoother, avoiding jamming, and combined with mechanical linkage to achieve continuous action, greatly improving gripping and releasing efficiency. The limiting ring can limit the movement range of the connecting rod and prevent the limiting component from disengaging inward when not in operation. The inclined surface and the conical head generatrix have the same slope, forming a surface fit that disperses the squeezing force. Furthermore, the difference in slope between the inclined surface and the guide cone increases unlocking resistance and the required downward stroke for unlocking, preventing failure due to excessive downward movement of the spreader during gripping. The mutual attraction between the lower and upper magnetic assemblies corrects spreader sway deviations, improves docking accuracy, and reduces contact impact to protect equipment and containers. A gas spring drives the first magnet to extend early for attraction and then retract, balancing elastic yielding and motion guidance to further improve guiding accuracy. The conical inclined surface of the guide sleeve compensates for the insufficient correction of minor offsets by magnetic attraction, achieving precise magnet alignment. This improves the docking accuracy between the lifting cylinder and the lower positioning assembly, ensures a smooth and impact-free guiding process, reduces magnet wear, and extends the service life of the magnetic assemblies. Attached Figure Description

[0017] To more clearly illustrate the technical solution of this utility model, the drawings used in the description 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.

[0018] Figure 1 This is a structural schematic diagram of a specific embodiment of the present utility model; Figure 2 This is a schematic diagram of the limiting component in a specific embodiment of the present invention; Figure 3 This is a cross-sectional schematic diagram of a specific embodiment of the present utility model.

[0019] Legend: 10. Upper positioning assembly; 11. Sealing plate; 12. Slot; 13. Slide groove; 14. Lifting cylinder; 20. Lower positioning assembly; 21. Conical head; 22. Support rod; 23. Movable cone block; 24. Guide cone surface; 25. Washer ring; 26. Base plate; 27. Fixing screw; 28. Slot hole; 30. Limiting assembly; 31. Movable clamping block; 32. Inclined surface; 33. Connecting rod; 34. Spring; 35. Limiting ring; 40. Lower magnetic suction assembly; 41. Gas spring; 42. Push rod; 43. Upper magnet fixing seat; 44. First magnet; 50. Upper magnetic suction assembly; 51. Lower magnet fixing seat; 52. Second magnet; 53. Guide sleeve; 54. Conical inclined surface. Detailed Implementation

[0020] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0021] like Figure 1-3As shown, a container spreader positioning device includes an upper positioning component 10 and a lower positioning component 20 that can dock with each other. The two work together to achieve efficient and precise positioning and gripping operations. The lower positioning component 20 includes a conical head 21, with the small-diameter end of the conical head 21 located above the large-diameter end. The large-diameter end is connected to a support rod 22. The lower end of the support rod 22 is provided with a base plate 26. The base plate 26 is provided with fixing screws 27 for connecting the container, which can realize a firm connection between the lower positioning component 20 and the container, avoiding positioning failure or safety hazards due to loosening during hoisting. A washer 25 for supporting the movable cone block 23 is fixedly connected to the support rod. The thickness of the washer 25 is greater than the thickness of the bolt head of the fixing screw 27. This can provide initial support for the movable cone block 23, shorten the docking adjustment stroke, and avoid interference of the bolt head on the sliding of the movable cone block 23, ensuring smooth movement. A movable cone 23 is slidably mounted on the support rod 22. The smaller diameter end of the movable cone 23 is located below the larger diameter end, and a guide cone 24 is provided above the end face of the larger diameter end. The tip of the guide cone 24 is higher than the movable cone 23, providing smooth guidance for the unlocking process. A slot 28 extending into the support rod 22 is opened at the center of the upper end face of the cone head 21. A lower magnetic attraction assembly 40 is provided in the slot 28. The lower magnetic attraction assembly 40 includes a gas spring 41. The moving end of the gas spring 41 is set upward and movably connected to a push rod 42. An upper magnet fixing seat 43 is fixedly connected to the upper end of the push rod 42. A first magnet 44 is installed at the center of the top surface of the upper magnet fixing seat 43. The gas spring 41 can drive the first magnet 44 to extend in advance or retract later, taking into account both elastic yielding and motion guidance, and improving guidance accuracy.

[0022] The upper positioning component 10 includes a lifting cylinder 14, the upper end of which is closed, and its inner cavity forms a downward-opening slot 12. The top surface of the inner cavity of the slot 12 is provided with a guide sleeve 53, and the inside of the guide sleeve 53 is provided with a tapered inclined surface 54. The small diameter end of the tapered inclined surface 54 is located above the large diameter end, and a second magnet 52 is provided at the center of the small diameter end. The second magnet 52 is installed at the center of the bottom surface of the lower magnet fixing seat 51, which is fixedly connected to the upper end of the slot 12, forming an upper magnetic attraction component 50 that attracts the lower magnetic attraction component 40. The second magnet 52 can also be attracted with the first magnet 44. The two work together to achieve active guidance and positioning of the lifting device and the lower positioning component 20, changing the traditional passive buffer mode, greatly shortening the calibration time, and reducing the impact of the lifting device swing. The tapered inclined surface 54 of the guide sleeve 53 can also make up for the insufficient correction of small offsets by magnetic attraction, achieve precise alignment of the magnet, reduce collision wear, and extend the life of the component. The side wall of the lifting cylinder 14 has a sliding groove 13 communicating with the slot 12. A limit component 30 is slidably disposed in the sliding groove 13. The front end of the limit component 30 is located between the conical head 21 and the movable conical block 23. It includes a movable clamping block 31. The front end of the movable clamping block 31 is provided with a downward-facing inclined surface 32. The slope of the inclined surface 32 is the same as the generatrix slope of the conical head 21 and less than the slope of the guide cone surface 24. This allows it to form a surface fit with the conical head 21 to distribute the force and reduce unlocking resistance, ensuring smooth operation. The rear end of the movable clamping block 31 is fixedly connected to a connecting... The connecting rod 33 has a sealing plate 11 at one end of the sliding groove 13 located on the outer periphery of the lifting cylinder. The connecting rod passes through the sealing plate 11, and a limit ring 35 is fixedly provided on the outer periphery of the end of the connecting rod that extends out of the sealing plate 11. This can limit the movement range of the connecting rod 33 and prevent the limit component 30 from coming out when it is not in operation. A spring 34 is sleeved on the connecting rod 33. The two ends of the spring 34 abut against the movable clamping block 31 and the sealing plate 11, respectively. The movable clamping block 31 can be automatically reset and retracted without additional drive. This simplifies the structure and realizes the mechanical linkage of clamping and unlocking, greatly improving the gripping and releasing efficiency of the lifting device.

[0023] When this device is in use, at least two sets are installed between the container and the spreader. When the device is not in operation, the lower positioning component 20 is firmly connected to the preset position of the container by the fixing screws 27 on the base plate 26. The pad ring 25 on the support rod supports the movable cone block 23, keeping it in the initial support position. The upper positioning component 10 is suspended above the container with the spreader. The slot 12 of the lifting cylinder 14 is set downwards. The spring 34 in the limiting component 30 is in a naturally extended state. The movable clamp block 31 is partially inserted into the slot 12 under the action of the spring force. The limiting ring 35 maintains a certain distance from the outer side of the sealing plate 11. When the spreader drives the upper positioning component 10 to descend towards the container and enter the coarse positioning range, the lower magnetic suction component 40 is activated: the moving end of the gas spring 41 in the slot 28 extends upwards, pushing the push rod 42 to move the upper magnet fixing seat 43 and the first magnet 44 upwards along the slot 28 until the first magnet 44 extends out of the upper end face of the cone head 21. When grabbing the container, the spreader moves downward. The extended first magnet 44 and the second magnet 52 of the upper magnetic attraction assembly 50 inside the lifting cylinder 14 generate magnetic attraction due to their opposite poles. The magnetic attraction causes the lifting cylinder 14 to shift towards the conical head 21, correcting the alignment deviation caused by the swing of the spreader. Under the action of magnetic attraction, the first magnet 44 moves into the slot 12. Its upper end first contacts the conical inclined surface 54 of the guide sleeve 53. The conical inclined surface 54 guides the first magnet 44 step by step to the center of the small diameter end, so that the first magnet 44 and the second magnet 52 located at that position are precisely attracted. Subsequently, the gas spring 41 retracts, pulling the first magnet 44 back to its original position via the push rod 42. Simultaneously, the lifting cylinder 14 moves downward, allowing the conical head 21 to precisely insert into the slot 12 of the lifting cylinder 14, completing a precise docking. As the lifting cylinder 14 continues to move downward, the conical surface of the conical head 21 contacts and compresses the inclined surface 32 at the front end of the movable clamping block 31, pushing the movable clamping block 31 to slide outward along the slide groove 13. At the same time, the spring 34 on the connecting rod 33 is compressed. When the movable clamping block 31 moves downward with the lifting cylinder 14 until it has completely passed the conical head 21, the spring 34 releases its elasticity, pushing the movable clamping block 31 back to its original position, with its front end locking into the gap between the conical head 21 and the movable conical block 23. At this point, the limiting component 30 forms a rigid fit with the bottom surface of the conical head 21, serving as an auxiliary force point to bear the weight of the container. The spreader starts to lift, and the container is lifted through the locking structure of the upper positioning component 10 and the lower positioning component 20.

[0024] When unlocking is required, the lifting device first moves the upper positioning component 10 slightly downward: the downward movement of the lifting cylinder 14 causes the inclined surface 32 of the movable clamping block 31 to contact the guide cone surface 24 of the movable cone block 23. Due to the contact angle of the tip of the inclined surface 32 with the guide cone surface 24, the force exerted by the guide cone surface on the inclined surface 32 pushes the movable clamping block 31 and slides it outward again, compressing the spring 34, so that the front end of the movable clamping block 31 passes over the movable cone block 23. Subsequently, the lifting device moves the upper positioning component 10 upward, and the movable clamping block 31 moves upward synchronously against the surface of the movable cone block 23 under the action of the spring force, thereby driving the movable cone block 23 to slide upward along the support rod 22. When the movable cone block 23 moves upward to abut against the lower end of the cone head 21, the inclined surface 32 of the movable clamping block 31 contacts the lower cone surface of the cone head 21. Under the continuous upward force of the lifting device, the movable clamping block 31 compresses the spring 34 again and moves outward, completely passing over the cone head 21. At this point, the locking relationship between the limit component 30 and the lower positioning component 20 is released, and the lifting device continues to lift, causing the upper positioning component 10 and the lower positioning component 20 to separate, thus completing the unlocking and disengagement.

[0025] As can be seen from the above embodiments, the advantages of this utility model are as follows: This solution achieves active positioning through the cooperation of upper and lower positioning components and the guiding effect of the conical head, changing the traditional passive buffer adjustment mode, significantly shortening the alignment and calibration time. At the same time, the rigid cooperation between the limiting component and the conical head can serve as an auxiliary force point to bear the weight of the container, making clamping and unlocking operations smooth and convenient. The fixing screws on the base plate ensure a firm connection between the lower positioning component and the container, avoiding positioning failure or safety hazards caused by loosening. The washer ring can support the movable cone block, shorten the docking adjustment stroke, and its thickness design can avoid the bolt head interfering with the movement of the movable cone block, ensuring smooth operation. The elastic extension and contraction of the spring in the limiting component enables the movable clamping block to automatically reset and retract, eliminating the need for an additional drive mechanism, simplifying the structure. The inclined surface design makes the contact force smoother, avoiding jamming, and combined with mechanical linkage to achieve continuous action, greatly improving gripping and releasing efficiency. The limiting ring can limit the movement range of the connecting rod and prevent the limiting component from disengaging inward when not in operation. The inclined surface and the conical head generatrix have the same slope, forming a surface fit that disperses the squeezing force. Furthermore, the difference in slope between the inclined surface and the guide cone increases unlocking resistance and the required downward stroke for unlocking, preventing failure due to excessive downward movement of the spreader during gripping. The mutual attraction between the lower and upper magnetic assemblies corrects spreader sway deviations, improves docking accuracy, and reduces contact impact to protect equipment and containers. A gas spring drives the first magnet to extend early for attraction and then retract, balancing elastic yielding and motion guidance to further improve guiding accuracy. The conical inclined surface of the guide sleeve compensates for the insufficient correction of minor offsets by magnetic attraction, achieving precise magnet alignment. This improves the docking accuracy between the lifting cylinder and the lower positioning assembly, ensures a smooth and impact-free guiding process, reduces magnet wear, and extends the service life of the magnetic assemblies.

[0026] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present 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 container spreader positioning device, comprising an upper positioning component (10) and a lower positioning component (20) capable of docking with each other, characterized in that: The lower positioning component (20) includes a conical head (21), the small diameter end of which is located above the large diameter end. The large diameter end of the conical head (21) is connected to a support rod (22). The lower end of the support rod (22) is provided with a base plate (26). A movable cone block (23) is slidably provided on the support rod (22). The small diameter end of the movable cone block (23) is located below the large diameter end. A guide cone surface (24) is provided above the end face of the large diameter end of the movable cone block (23). The tip of the guide cone surface (24) is higher than the movable cone block (23). The upper positioning component (10) includes a lifting cylinder (14), the upper end of which is closed, and the inner cavity of the lifting cylinder (14) forms a downward-opening slot (12). A sliding groove (13) communicating with the slot (12) is provided in the side wall of the lifting cylinder (14). A limiting component (30) is slidably arranged in the sliding groove (13), and the front end of the limiting component (30) is located between the conical head (21) and the movable cone block (23).

2. The container spreader positioning device according to claim 1, characterized in that: The base plate (26) is provided with fixing screws (27) for connecting the container, and the support rod is fixedly connected with a washer (25) for supporting the movable cone block (23). The thickness of the washer (25) is greater than the thickness of the bolt head of the fixing screw (27).

3. The container spreader positioning device according to claim 1, characterized in that: The limiting component (30) includes a movable clamping block (31), the front end of which is provided with an inclined surface (32) facing downwards, and the rear end of which is fixedly connected with a connecting rod (33). The end of the slide groove (13) located on the outer periphery of the lifting cylinder is provided with a sealing plate (11), the connecting rod passes through the sealing plate (11), and a spring (34) is sleeved on the connecting rod (33). The two ends of the spring (34) abut against the movable clamping block (31) and the sealing plate (11) respectively.

4. The container spreader positioning device according to claim 3, characterized in that: A limit ring (35) is fixedly installed on the outer periphery of one end of the connecting rod (33) that extends out of the sealing plate (11).

5. The container spreader positioning device according to claim 3, characterized in that: The slope of the inclined surface (32) is the same as the slope of the generatrix of the conical head (21), and is less than the slope of the guide cone surface (24).

6. The container spreader positioning device according to claim 1, characterized in that: The upper end face of the conical head (21) is provided with a slot (28), a lower magnetic attraction component (40) is provided in the slot (28), and an upper magnetic attraction component (50) is provided in the hanging cylinder (14). The lower magnetic attraction component (40) and the upper magnetic attraction component (50) attract each other.

7. The container spreader positioning device according to claim 6, characterized in that: The slot (28) extends into the support rod (22). The lower magnetic attraction assembly (40) includes a gas spring (41). The moving end of the gas spring (41) is set upward and is movably connected to a push rod (42). The upper end of the push rod (42) is fixedly connected to an upper magnet fixing seat (43). A first magnet (44) is installed at the center of the top surface of the upper magnet fixing seat (43). The first magnet (44) can attract the upper magnetic attraction assembly (50).

8. The container spreader positioning device according to claim 7, characterized in that: The upper magnetic attraction assembly (50) includes a lower magnet fixing seat (51) fixedly connected to the upper end of the slot (12). A second magnet (52) is installed at the center of the bottom surface of the lower magnet fixing seat (51). The second magnet (52) can attract the first magnet (44).

9. The container spreader positioning device according to claim 8, characterized in that: The top surface of the inner cavity of the slot (12) is also provided with a guide sleeve (53), and the inside of the guide sleeve (53) is provided with a tapered inclined surface (54). The small diameter end of the tapered inclined surface (54) is located above the large diameter end, and the second magnet (52) is located at the center of the small diameter end of the tapered inclined surface (54).

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