A new type of plate spreader for ship loading and unloading

Abstract

The application relates to the technical field of port loading and unloading equipment, and particularly discloses a novel medium-thick plate lifting appliance for ship loading and unloading operation. In order to solve the technical problem that the existing medium-thick plate lifting appliance needs two people to cooperate, moves the clamping jaw body to carry out hooking operation, causes time and labor consumption, and is highly dependent on manpower, the medium-thick plate lifting appliance comprises a supporting rod, the bottom of the supporting rod is provided with a first lifting ring and a second lifting ring; a flexible load-bearing cable is connected between the first lifting ring and the second lifting ring, a first clamping jaw body and a second clamping jaw body are slidably arranged on the flexible load-bearing cable, a hook is arranged on the first lifting ring or the second lifting ring, the first clamping jaw body is connected with an elastic member, the other end of the elastic member is connected with an adjusting chain, any chain link of the adjusting chain can be hooked with the hook, so that the first clamping jaw body is suspended above the second clamping jaw body in the empty state, and the height difference of the two clamping jaw bodies is formed. The application realizes that the heavy component does not need to be climbed onto the vehicle and moved when the hook is hooked, and eliminates the safety risks such as falling and pinching.

Description

Technical Field

[0001] This application relates to the field of port loading and unloading equipment technology, and in particular to a new type of medium and heavy plate lifting device for loading and unloading ship operations. Background Technology

[0002] Currently, the lifting of medium and heavy plates mainly uses plate clamp-type lifting tools, which lift the plate by gripping its edges from both sides. However, existing medium and heavy plate lifting tools have revealed many technical defects in long-term use.

[0003] First, the existing lifting clamps are usually fixed directly under the support bar or can only move in a limited way along the rigid beam. It is difficult to flexibly adjust the clamping position according to the width of the plate. As a result, when hooking, the operator has to climb onto the vehicle and manually move the clamp to position. This is not only labor-intensive, but also poses a high risk of personal injury such as falling and being pinched. At the same time, since there is no clamp suspension and positioning mechanism, the clamp is in a free swinging state during the hooking process. It is difficult for the operator to accurately control the position of the clamp, which further increases the difficulty and time of hooking.

[0004] Secondly, the existing lifting tools only have a fixed number of lifting lugs (usually 3 pairs) on the support. When dealing with medium and thick plates with large differences in length, the number and position of the clamping bodies cannot be flexibly increased or decreased, resulting in an unreasonable distribution of lifting points. Under extreme working conditions, there are safety hazards such as the center of gravity of the goods shifting, tilting and slipping. In addition, different specifications of goods require frequent replacement of lifting tools, resulting in long auxiliary operation time.

[0005] Furthermore, traditional spreader clamps have narrow clamping jaws (usually about 5cm). When lifting thin medium-thick plates, the clamp tips exert significant pressure on the plate surface under the weight of the cargo, easily causing irreversible surface damage such as hook marks and indentations. Additionally, the clamp tip opening angle of traditional spreader clamps is typically 90°. When cargo is hoisted to the hold floor or designated stacking location, the medium-thick plate presses down on the clamping jaws, making it difficult for the clamps to disengage from the plate edges. Currently, the industry commonly uses a sledgehammer to strike the clamps for forced disengagement. However, prolonged striking can damage the clamp structure, shorten the spreader's lifespan, and cause indentations on the lower cargo, potentially leading to secondary quality issues. Summary of the Invention

[0006] To address the technical problem that existing medium and heavy plate lifting tools require two people to work together, each carrying approximately 20 kilograms of clamping clamps for hooking operations, resulting in time-consuming, labor-intensive, and highly dependent-on-human-power operations, this application provides a novel medium and heavy plate lifting tool for ship loading and unloading operations.

[0007] This application provides a novel medium-thick plate lifting tool for ship loading and unloading operations, comprising: a horizontally arranged support bar, wherein a first lifting ring and a second lifting ring are respectively provided on both sides of the bottom of the support bar; A flexible load-bearing cable is connected between the first lifting ring and the second lifting ring. The two ends of the flexible load-bearing cable are fixedly connected to the first lifting ring and the second lifting ring, respectively. A first clamping clamp and a second clamping clamp are slidably arranged on the flexible load-bearing cable. The first clamping clamp and the second clamping clamp are suspended on the flexible load-bearing cable. The first or second lifting ring is also provided with a hook, the first clamping clamp body is connected to an elastic element, and the end of the elastic element away from the first clamping clamp body is connected to an adjusting chain. Any link of the adjusting chain can selectively hook with the hook to adjust the suspension position of the first clamping clamp body. By selectively hooking different links of the adjusting chain with the hook, the first clamping clamp body is suspended above the second clamping clamp body in an unloaded state, forming a height difference between the two clamping clamp bodies.

[0008] In some embodiments, a sleeve is slidably disposed on the flexible load-bearing cable, the sleeve being located between the first clamping clamp and the second clamping clamp to isolate the flexible load-bearing cable from direct contact with the edges of the cargo. In some embodiments, the clamping clamp body is provided with a pulley, and the flexible load-bearing cable passes through the groove of the pulley. In some embodiments, the jaws of the first clamping jaws and the second clamping jaws are arranged opposite each other, and the opening angle of the jaw tips is 110°. In some embodiments, an auxiliary fulcrum is provided on the back of the clamping body, which is used to cooperate with external tools to achieve remote push-pull operations.

[0009] In some embodiments, the width of the clamping jaws is not less than 8 cm. In some embodiments, an auxiliary pulley is provided at the bottom of the clamping body, which is used to reduce the frictional resistance between the clamping body and the contact surface when unhooking.

[0010] In some embodiments, the first lifting ring and the second lifting ring constitute a pair of lifting lugs, which are disposed on both sides of the bottom of the support bar. In some embodiments, the support bar is also provided with multiple pairs of lifting lugs, and each clamping clamp body can be selectively installed on the lifting lugs at different positions according to the specifications of the goods. In some embodiments, when the goods land and bear weight, the clamping tips of the clamping body slide outward along the side wall of the plate under the weight of the goods, thereby achieving automatic unhooking. In summary, this application includes at least one of the following beneficial technical effects: 1. The support bar is horizontally set and connected to the gantry crane hook via the first and second lifting rings at both ends. A flexible load-bearing cable spans between the two lifting rings as a sliding load-bearing path for the clamping bodies. Both clamping bodies can slide freely along the flexible load-bearing cable to adapt to plates of different widths. The hook on the first or second lifting ring, together with the elastic element and adjusting chain connected to the first clamping body, constitutes a suspension and positioning system. After the operator pulls the adjusting chain to the appropriate length according to the width of the plate, the corresponding chain link is hooked into the hook to determine the suspension height of the first clamping body on the flexible load-bearing cable. In the non-working state, the tension of the elastic element keeps the first clamping body suspended above the second clamping body and maintains a stable suspension posture. After the first clamping body completes the hooking of the side wall of the plate, the continuous tension of the elastic element keeps the clamping body in close contact with the side wall of the plate and prevents it from shaking and falling off while waiting for the other side to be operated. The detachable connection between the multiple pairs of lifting lugs on the support bar and the clamping bodies constitutes a modular combination structure, and the number of clamping bodies can be increased or decreased according to the length of the goods.

[0011] The link-type engagement of the adjusting chain and hook allows operators to quickly set the suspension position of the first clamping jaw without tools. The continuous tension of the elastic element keeps the clamped jaw in a stable hooking state, thus effectively maintaining the results after one person operates one side, creating conditions for one person to complete the hooking of both sides in sequence. Each clamping jaw can slide freely on the flexible load-bearing cable to adapt to plates of different widths. The combination of multiple pairs of lifting lugs and detachable clamping jaws allows the lifting device to quickly adapt to goods of different lengths. When hooking, there is no need to climb onto the vehicle to move heavy parts, eliminating safety risks such as falls and pinching injuries, and greatly reducing labor intensity.

[0012] 2. When a medium-thick plate is clamped and lifted, its upper edge is positioned below the flexible support cable. The sleeve is located precisely at the intersection of the plate's edge and the flexible support cable, effectively isolating them. During the lifting or lowering of the lifting device, the outer wall of the sleeve contacts the surface of the plate's edge and can rotate freely relative to the flexible support cable, thus creating rolling friction on the contact surface. The sleeve prevents direct friction between the flexible support cable and the plate's edge, which could lead to cable wear and breakage, significantly improving the lifting device's service life and operational safety. Simultaneously, the sleeve's free rolling on the steel plate surface converts sliding friction into rolling friction, effectively reducing the frictional resistance between the lifting device and the cargo, protecting the cargo surface from scratches and reducing the energy consumption of the lifting equipment.

[0013] 3. The pulley converts the sliding friction between the clamping body and the flexible load-bearing cable into rolling friction, significantly reducing frictional resistance. Operators can easily push the clamping body along the flexible load-bearing cable to quickly complete the positioning in the width direction of the plate. The restraining effect of the pulley on the flexible load-bearing cable ensures the stable posture of the clamping body during hoisting, avoiding swaying or deflection of the clamping body during hoisting, and ensuring the reliability of clamping and the safety of hoisting.

[0014] 4. The clamp tip opening angle is 110°. The large 110° opening causes the clamp tip to experience an outward component force along the opening direction under the weight of the cargo. This component force forces the clamp tip to automatically slide outward along the side wall of the plate. After the cargo lands, the clamping force of the clamp body on the side wall of the plate is completely released, and the clamp tip automatically withdraws under the action of its own weight, completing the unhooking without manual intervention. It achieves the dual functions of stable clamping during lifting and automatic unhooking after landing, avoiding the operation of manually using a sledgehammer to strike the clamp body to forcibly unhook the traditional 90° opening lifting device. This reduces the structural damage to the clamp body caused by striking and the marks on the lower cargo, eliminates the safety hazard of flying debris injuring people during striking operations, and saves about 5 minutes of unhooking time per hook.

[0015] 5. The auxiliary pulley reduces the driving force required for unhooking, ensuring the reliability of automatic unhooking even when goods are stacked tightly or when there is high friction between the clamp and the contact surface. Combined with the 110° large opening angle, it further accelerates the speed at which the clamp tip slides outward, ensuring that each unhooking is successful on the first try without repeated operations. It eliminates the situation where automatic unhooking fails due to excessive unhooking resistance, necessitating the use of a striking method, further ensuring the safety of equipment and goods. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application 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 application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A schematic diagram of the overall structure of a novel medium-thick plate lifting device for ship loading and unloading operations provided in this application embodiment; Figure 2 This is an enlarged structural schematic diagram of the first clamping clamp body shown in the embodiment of this application; Figure 3 This is a schematic diagram showing the structure of the lifting device when it begins to be lifted, according to an embodiment of this application. Explanation of reference numerals in the attached drawings: 1. Support bar; 11. First lifting ring; 12. Second lifting ring; 13. Hook; 2. Flexible load-bearing cable; 3. First clamping clamp body; 4. Second clamping clamp body; 5. Elastic element; 6. Adjusting chain; 7. Pulley; 8. Sleeve; 9. Auxiliary fulcrum; 91. Auxiliary pulley. Detailed Implementation

[0018] To better understand the technical solutions provided in the embodiments of this specification, the technical solutions of the embodiments of this specification will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. In the absence of conflict, the embodiments of this specification and the technical features in the embodiments can be combined with each other.

[0019] In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. The term "two or more" includes two or more cases.

[0020] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0021] Reference Figures 1 to 3 This application discloses a novel medium-thick plate lifting device for ship loading and unloading operations, comprising a horizontally arranged support bar 1, with a first lifting ring 11 and a second lifting ring 12 respectively provided on both sides of the bottom of the support bar 1 for connection to the hook of lifting equipment such as a gantry crane. A flexible load-bearing cable 2 is connected between the first lifting ring 11 and the second lifting ring 12. The flexible load-bearing cable 2 is preferably made of steel wire rope, and its two ends are fixedly connected to the first lifting ring 11 and the second lifting ring 12 respectively. A first clamping clamp body 3 and a second clamping clamp body 4 are slidably arranged on the flexible load-bearing cable 2. Both the first clamping clamp body 3 and the second clamping clamp body 4 are provided with pulleys 7. The flexible load-bearing cable 2 passes through the groove of the pulley 7, suspending the two clamping clamp bodies on the flexible load-bearing cable 2, so that each clamping clamp body can slide freely along the flexible load-bearing cable 2. The pulley 7 converts the sliding friction between the clamping body and the flexible load-bearing cable 2 into rolling friction, allowing the operator to easily push the clamping body along the flexible load-bearing cable 2 to the corresponding positions on both sides of the plate, achieving adaptive clamping of plates of different widths. At the same time, the restraint effect of the pulley 7 on the flexible load-bearing cable 2 ensures the stable posture of the clamping body during hoisting.

[0022] A hook 13 is also provided on the first lifting ring 11 or the second lifting ring 12. The first clamping clamp body 3 is connected to an elastic element 5, preferably a spring. The end of the elastic element 5 away from the first clamping clamp body 3 is connected to an adjusting chain 6. Any link of the adjusting chain 6 can be selectively hooked with the hook 13 to adjust the suspension position of the first clamping clamp body 3. After the operator pulls the adjusting chain 6 to a suitable length according to the width of the plate, the corresponding link is hooked into the hook 13, thus limiting the suspension height of the first clamping clamp body 3 on the flexible load-bearing cable 2. In the non-working state, the first clamping clamp body 3 is suspended above the second clamping clamp body 4 by the tension of the elastic element 5, forming a height difference between the two clamping clamp bodies. The elastic element 5 provides continuous tension to keep the first clamping clamp body 3 in a stable suspension posture and prevent it from swinging freely in the air. After the first clamping clamp 3 completes the hooking of the side wall of the plate, the tension of the elastic element 5 keeps the clamp body in a state of close contact with the side wall of the plate, and will not shake or fall off while waiting for the other side to be operated, so that the results of a single person operating one side can be effectively maintained.

[0023] Reference Figure 3 By adjusting the selective hooking of different links of chain 6 with hook 13, the first clamping clamp 3 is suspended above the second clamping clamp 4 in an unloaded state, forming a height difference between the two clamping clamps. The slinger first completes the hooking 13 of the second clamping clamp 4 on the lower side. This side is lower and easier to operate on the ground or at the bottom of the tank. The already hooked second clamping clamp 4 does not need to be held. Then, the gantry crane moves the support bar 1 to the other side, and the first clamping clamp 3 is guided to the other side wall of the plate by remote pushing and pulling with tools such as spear hooks to complete the hooking 13. The operations on both sides are carried out in sequence without interfering with each other, thus realizing that a single person can independently complete all hooking 13 operations, eliminating the traditional operation mode that requires two people to move the heavy clamps weighing about 20 kilograms and cooperate with each other.

[0024] The first lifting ring 11 and the second lifting ring 12 constitute a pair of lifting lugs. Multiple pairs of lifting lugs are provided along the length of the support bar 1, with each pair of lugs evenly spaced along the length of the support bar 1. Preferably, there are four or more pairs, and in this embodiment, there are six pairs. The number of clamping clamps can be adjusted according to the length of the goods. When the goods are long, the number of clamping clamps is increased to distribute the load at the lifting points and maintain the goods in a horizontal position. When the goods are short, the number of clamping clamps is reduced to avoid unnecessary clamps interfering with the operation.

[0025] Reference Figure 1In one specific embodiment, the jaws of the first clamping jaw 3 and the second clamping jaw 4 are arranged opposite each other, that is, the opening directions of the two jaws face each other. When the clamping jaws approach from both sides of the plate, the jaws on both sides simultaneously engage with the edges of the plate to achieve clamping. The jaw opening angle is 110°, which is significantly larger than the 90° opening of traditional spreaders. When the spreader lifts the cargo to the hold or a designated stacking position, the cargo touches the ground and bears weight. The force state of the jaws changes fundamentally—the large 110° opening causes the jaws to experience an outward component force along the opening direction under the weight of the cargo. This component force forces the jaws to automatically slide outward along the side wall of the plate. After the cargo lands, the clamping force of the jaws on the side wall of the plate is completely released, and the jaws automatically withdraw under the force of their own weight, completing the unhooking without manual intervention. The 110° large opening angle enables stable clamping during lifting and automatic disengagement after landing, eliminating the need for manual hammering of the clamp body to forcibly disengage the traditional 90° opening lifting device. This also eliminates structural damage to the clamp body caused by hammering and scratches to the lower cargo, as well as the safety hazard of flying debris injuring people during hammering operations.

[0026] In another specific embodiment, an auxiliary fulcrum 9 is provided on the back of the clamping clamp body. The auxiliary fulcrum 9 can be a pull ring, lifting lug, or hook. The auxiliary fulcrum 9 provides a clear point of force application for external tools such as spear hooks or pull rods. The operator can use a spear hook to hook the auxiliary fulcrum 9 from a safe position on the ground or at the bottom of the tank to push and pull, thereby guiding the first clamping clamp body 3 along the flexible load-bearing cable 2 to a predetermined position on the other side wall of the plate to complete the hooking 13. Since the first clamping clamp body 3 is suspended on the flexible load-bearing cable 2 by pulleys 7 and is under the suspension tension of the elastic element 5, the clamp body can move flexibly in the horizontal direction with a small amount of external force. Rigging does not need to climb onto the vehicle to move the heavy clamping clamp body. The hooking 13 operation can be completed on the ground using simple tools such as spear hooks, eliminating the risk of personal injury from working at height and moving heavy parts. Remote operation keeps the operator at a safe distance from heavy parts, and even if there is an accidental slippage, it will not cause injury to personnel.

[0027] Reference Figure 2In another specific embodiment, an auxiliary pulley 91 is provided at the bottom of the clamping body. When the cargo lands and bears weight, the clamp tips expand outwards to both sides under the weight of the cargo. During this process, the bottom of the clamping body may come into contact with the surface of the plate or the bottom of the hold. The auxiliary pulley 91 rolls as the clamping body expands outwards during the unhooking process, converting the sliding friction between the bottom of the clamping body and the contact surface into rolling friction. This reduces the resistance to the outward sliding of the clamping body, allowing it to slide out smoothly under its own weight without the need for additional striking force. The auxiliary pulley 91 reduces the driving force required for unhooking, ensuring the reliability of automatic unhooking even when the cargo is stacked tightly or the friction between the clamping body and the contact surface is high. Combined with the 110° large opening angle, this further accelerates the speed at which the clamp tips slide outwards, ensuring that each unhooking is successful on the first attempt without the need for repeated operations.

[0028] In another specific embodiment, the width of the clamping jaws is not less than 8cm, preferably 10cm, significantly larger than the approximately 5cm width of traditional lifting clamps. The clamping jaws are the pressure-bearing working surfaces where the clamp tips directly contact the sidewalls of the sheet material. When the clamping jaws hold the sheet material for lifting, the entire weight of the sheet material is transferred to the clamping jaws through both clamping jaws. The wider the clamping jaws, the larger the contact area with the sheet material, and the lower the pressure per unit area for the same weight. The wider clamping jaws allow the contact stress between the clamping jaws and the sidewalls of the sheet material to be evenly distributed over a larger area, avoiding stress concentration. The wider clamping jaws significantly reduce the pressure per unit area of ​​the sheet material surface from the clamp tips, reducing the risk of surface damage such as hook marks and indentations from the source. When lifting thinner medium-thick plates, it effectively avoids edge deformation or breakage of the sheet material due to excessive local pressure.

[0029] In another specific embodiment, a sleeve 8 is slidably disposed on the flexible load-bearing cable 2, located between the first clamping clamp body 3 and the second clamping clamp body 4. The sleeve 8 is a hollow tubular component, with an inner diameter larger than the outer diameter of the flexible load-bearing cable 2, allowing the sleeve 8 to slide freely on the flexible load-bearing cable 2. When the thick plate is clamped and lifted, the upper edge of the plate is directly below the flexible load-bearing cable 2, and the sleeve 8 is precisely located at the intersection of the plate's edge and the flexible load-bearing cable 2, effectively isolating the flexible load-bearing cable 2 from the plate's edge. During the lifting or lowering of the lifting device, the outer wall of the sleeve 8 contacts the surface of the plate's edge, and the sleeve 8 can rotate freely relative to the flexible load-bearing cable 2, forming rolling friction on the contact surface. This design prevents the flexible load-bearing cable 2 from directly rubbing against the edges of the plate, thus avoiding wear and breakage of the cable and significantly improving the service life and operational safety of the lifting equipment. On the other hand, during the lifting process, the sleeve 8 can roll freely on the surface of the steel plate, converting sliding friction into rolling friction, which effectively reduces the frictional resistance between the lifting equipment and the cargo, protecting the cargo surface from scratches and reducing the energy consumption of the lifting equipment.

[0030] The implementation principle of a novel medium-thick plate lifting device for loading and unloading ship operations according to an embodiment of this application is as follows: First, the first lifting ring 11 and the second lifting ring 12 at both ends of the support bar 1 are installed on the hook of the gantry crane. Based on the length specifications of the medium-thick plate to be lifted, the required number of clamping clamps are installed at the corresponding lifting lugs on the support bar 1, and the distance between each set of clamping clamps is adjusted. Then, based on the width specifications of the medium-thick plate, the adjusting chain 6 is pulled to a suitable length, and the corresponding chain link is hooked into the hook 13 on the first lifting ring 11 or the second lifting ring 12. The suspension height of the first clamping clamp 3 is preset. At this time, the first clamping clamp 3 is subjected to the pulling force of the elastic element 5 and is stably suspended above the second clamping clamp 4, forming a height difference between the two clamping clamps (refer to...). Figure 3 Next, utilizing the height difference, the slinger aligns the second clamping jaw 4, positioned on the lower side, with the side wall of the medium-thick plate. The support bar 1 is lowered so that the jaw tips embed into the side wall, completing the first side hook 13 (this side is the lower side; after the slinger completes the hook 13, it is already in a hooked state). Then, the gantry crane is operated independently to increase its amplitude and laterally move the support bar 1, positioning the first clamping jaw 3 on the other side wall of the medium-thick plate. The spear hook is used to engage the auxiliary fulcrum 9 on the back of the first clamping jaw 3, and a remote push and pull is used to align the jaw tips with the other side wall. The support bar 1 is then lowered again to complete the hooking. The entire process requires only one slinger to complete both sides sequentially. After the lifting device is raised, both clamping jaws are lifted simultaneously by the weight of the cargo, entering a stable lifting state.

[0031] Once the spreader lifts the cargo to the hold or designated stacking location, the cargo touches the ground and bears its weight, fundamentally changing the force on the jaws. A traditional 90° jaw is essentially a right-angled barb; as the cargo's weight moves downwards, the jaw actually grips tighter. However, the 110° wide-opening jaw's bevel angle becomes much gentler. The downward force of the cargo's weight generates an outward component along the jaw's bevel, which pushes the jaws to automatically slide outwards along the sidewall of the plate. Simultaneously, the auxiliary pulley 91 at the bottom of the clamping body rolls during the unhooking process as the clamp expands outwards, converting the sliding friction between the clamp's bottom and the contact surface into rolling friction, further reducing the resistance to the jaws sliding outwards. This structure allows the clamping force on the sidewall of the plate to be completely released after the cargo lands. Under the combined action of its own weight and the friction-reducing effect, the jaws automatically retract outwards, completing the unhooking process without manual intervention.

[0032] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

[0033] Although preferred embodiments have been described in this specification, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this specification.

[0034] Obviously, those skilled in the art can make various modifications and variations to this specification without departing from its spirit and scope. Therefore, if such modifications and variations fall within the scope of the claims and their equivalents, this specification is also intended to include such modifications and variations.

Claims

1. A novel medium-thick plate lifting device for ship loading and unloading operations, comprising a horizontally arranged support bar (1), characterized in that, The support bar (1) has a first lifting ring (11) and a second lifting ring (12) respectively on both sides of its bottom. A flexible load-bearing cable (2) is connected between the first lifting ring (11) and the second lifting ring (12). The two ends of the flexible load-bearing cable (2) are fixedly connected to the first lifting ring (11) and the second lifting ring (12) respectively. A first clamping clamp body (3) and a second clamping clamp body (4) are slidably arranged on the flexible load-bearing cable (2). The first clamping clamp body (3) and the second clamping clamp body (4) are suspended on the flexible load-bearing cable (2). A hook (13) is also provided on the first lifting ring (11) or the second lifting ring (12). The first clamping clamp body (3) is connected to an elastic element (5). An adjusting chain (6) is connected to one end of the elastic element (5) away from the first clamping clamp body (3). Any link of the adjusting chain (6) can be selectively hooked to the hook (13) to adjust the suspension position of the first clamping clamp body (3). By selectively hooking different links of the adjusting chain (6) with the hook (13), the first clamping clamp body (3) is suspended above the second clamping clamp body (4) in an unloaded state, forming a height difference between the two clamping clamp bodies.

2. The novel medium-thick plate lifting device for ship loading and unloading operations according to claim 1, characterized in that, A sleeve (8) is also slidably provided on the flexible load-bearing cable (2). The sleeve (8) is located between the first clamping clamp body (3) and the second clamping clamp body (4) to isolate the flexible load-bearing cable (2) from direct contact with the edges of the goods.

3. A novel medium-thick plate lifting device for ship loading and unloading operations according to claim 1, characterized in that, The clamping clamp body is provided with a pulley (7), and the flexible load-bearing cable (2) passes through the groove of the pulley (7).

4. A novel medium-thick plate lifting device for ship loading and unloading operations according to claim 1, characterized in that, The jaws of the first clamping jaw (3) and the second clamping jaw (4) are arranged opposite each other, and the opening angle of the jaw tips is 110°.

5. A novel medium-thick plate lifting device for ship loading and unloading operations according to claim 1, characterized in that, The back of the clamping body is provided with an auxiliary fulcrum (9), which is used to cooperate with external tools to realize remote push and pull operations.

6. A novel medium-thick plate lifting device for ship loading and unloading operations according to claim 1, characterized in that, The width of the clamping jaws is not less than 8cm.

7. A novel medium-thick plate lifting device for ship loading and unloading operations according to claim 6, characterized in that, The bottom of the clamping body is provided with an auxiliary pulley (91), which is used to reduce the frictional resistance between the clamping body and the contact surface when unhooking.

8. A novel medium-thick plate lifting device for ship loading and unloading operations according to claim 1, characterized in that, The first lifting ring (11) and the second lifting ring (12) form a pair of lifting lugs, which are located on both sides of the bottom of the support bar (1).

9. A novel medium-thick plate lifting device for ship loading and unloading operations according to claim 8, characterized in that, The support bar (1) is also provided with multiple pairs of lifting lugs, and each clamping clamp can be selectively installed on the lifting lugs at different positions according to the specifications of the goods.

10. A novel medium-thick plate lifting device for ship loading and unloading operations according to claim 1, characterized in that, When the goods land and bear weight, the clamping tips of the clamping body slide outward along the side wall of the plate under the weight of the goods, thus achieving automatic unhooking.

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