C-shaped hook with anti-falling performance

Abstract

The invention relates to the technical field of hoisting slings, and provides a C-shaped hook with anti-falling performance, the C-shaped hook comprises a hook body, the hook body is provided with an upper beam part, a connecting part and a bottom supporting part which are connected end to end, the upper beam part, the connecting part and the bottom supporting part jointly define a containing groove with an opening facing the side direction, the bottom supporting part is located at the bottom of the containing groove, and the containing groove is used for containing a coiled material; the bottom support part is used for abutting against the inner ring and supporting the coiled material; the swing rod piece is arranged on the bottom support part in a swing mode, the swing shaft is provided with a trigger part and a baffle in the transverse direction and the length direction of the swing rod piece, the trigger part and the baffle are located on the two sides of the swing shaft of the swing rod piece respectively, the baffle is located on the side, close to the opening direction of the containing groove, of the trigger part, and the trigger part is higher than the baffle. By means of the technical scheme, the technical problems that in the prior art, when a C-shaped hook is used for hoisting the hollow coiled material, the hollow coiled material with the large weight possibly slides and moves on the hook body, and then product quality damage and safety accidents are caused are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of hoisting slings, and in particular, to a C-shaped hook with anti-dropping performance. Background Art

[0002] In industrial fields such as warehousing logistics, the hoisting and transportation operations of hollow coils such as strip steel coils are very common. Due to its shape similar to the letter "C", the C-shaped hook can be conveniently inserted into the inner hole of the hollow coil to achieve rapid handling, and is widely used in such operations.

[0003] However, during actual hoisting, due to the large weight of hollow coils such as strip steel coils, the C-shaped hooks in the prior art mainly rely on the friction force between the hook body and the inner hole surface of the coil to maintain stability. The start-stop, swaying, turning and other operations during the operation of the crane are extremely likely to cause the steel coil to slide and shift on the C-shaped hook. Once the sliding occurs, the surface of the steel coil may be damaged, affecting the product quality; more seriously, it may cause the steel coil to fall off, resulting in safety accidents such as equipment damage and casualties, bringing great potential safety hazards and economic losses to production. Therefore, developing a C-shaped hook that can effectively prevent the hollow coil from sliding and shifting during hoisting and improve the safety and stability of hoisting is an urgent technical problem to be solved in this field. Summary of the Invention

[0004] To overcome the above defects, the present invention provides a C-shaped hook with anti-dropping performance, which solves the technical problem that in the prior art, when hoisting a hollow coil (such as a strip steel coil), the hollow coil with a large self-weight may slide and shift on the hook body, thereby causing damage to product quality and safety accidents.

[0005] According to one aspect, at least one embodiment of the present invention provides a C-shaped hook with anti-dropping performance for hoisting a hollow cylindrical coil. The coil has an inner ring and an outer cylindrical surface, and includes: A hook body, the hook body is provided with an upper beam portion, a connecting portion and a bottom support portion connected end to end. The upper beam portion, the connecting portion and the bottom support portion jointly enclose a receiving groove with an opening facing laterally. The bottom support portion is located at the bottom of the receiving groove. The receiving groove is used to receive the coil, and the bottom support portion is used to abut against the inner ring and support the coil; A swinging rod, the swinging rod is swingably arranged on the bottom support portion, the swinging axis is transverse, a triggering portion and a baffle are provided along the length direction of the swinging rod, and the triggering portion and the baffle are respectively located on both sides of the swinging axis of the swinging rod. The baffle is located on one side of the triggering portion close to the opening direction of the receiving groove, and when the swinging rod is configured to be in a reset state, the height of the triggering portion is higher than the height of the baffle. After the bottom support portion extends into the inner ring and supports the coil, the coil drives the triggering portion to move downward and at the same time drives the baffle to rise, so as to prevent the coil from falling off from the opening of the receiving groove.

[0006] For example, a C-shaped hook with anti-detachment performance provided by at least one embodiment of the present disclosure, the bottom support portion has a lower internal space, the swing rod is swingably arranged in the lower internal space, and the swing rod is configured to, after resetting, make the baffle plate located in the lower internal space, and at the same time the trigger portion extends out of the lower internal space and extends into the receiving groove.

[0007] For example, a C-shaped hook with anti-detachment performance provided by at least one embodiment of the present disclosure, a communication groove is opened on the top surface of the bottom support portion, and the communication groove is used to communicate the receiving groove and the lower internal space; the baffle plate is swingably arranged on the swing rod, and the baffle plate is arranged to move up and down in the communication groove, and the side walls on both sides of the communication groove are used to limit the swing angle of the baffle plate.

[0008] For example, a C-shaped hook with anti-detachment performance provided by at least one embodiment of the present disclosure, the overall center of gravity of the swing rod is located on the side of the hinge point close to the baffle plate, so that the swing rod can naturally be in a reset state when not subjected to external forces.

[0009] For example, a C-shaped hook with anti-detachment performance provided by at least one embodiment of the present disclosure further includes: A first top block, the first top block is arranged to slide up and down on the upper beam portion; A roller, the roller is arranged to move up and down and rotate on the upper beam portion, and the roller is used for rolling abutting against the outer cylindrical surface of the coil; A link assembly, one end of the link assembly is hinged to the first top block, and the other end is located above the rotation axis of the roller. The first top block is configured to, after being abutted by the coil and driven to move up, drive the roller to move down through the link assembly, so that the roller rolls abut against the outer cylindrical surface of the coil.

[0010] For example, a C-shaped hook with anti-detachment performance provided by at least one embodiment of the present disclosure, the link assembly includes: A swing rod, the middle section of the swing rod is hinged on the upper beam portion; A first link, one end of the first link is hinged to the first top block, and the other end is hinged to one end of the swing rod. The first link is configured to, after being driven by the first top block to move up, drive the swing rod to swing, so that the other end of the swing rod pushes the roller downwards.

[0011] For example, a C-shaped hook with anti-detachment performance provided by at least one embodiment of the present disclosure, a first strip-shaped guide groove along the vertical direction is opened on the side wall of the upper beam portion, and further includes: An axle block, the axle block is slidably arranged in the first strip-shaped guide groove, and the roller is rotatably arranged on the axle block; One end of the swing rod away from the first connecting rod is hinged with a contact block, which is used to swing driven by the swing rod and then abut against the shaft block.

[0012] For example, a C-shaped hook with anti-dropping performance provided by at least one embodiment of the present disclosure, the upper beam portion has an upper built-in space, the connecting rod assembly is located in the upper built-in space, and further includes: A first elastic member, one end of the first elastic member acts on the bottom wall of the first strip-shaped guide groove, and the other end acts on the shaft block, for elastically pushing the shaft block upward to provide a force for the shaft block to drive the roller to reset upward; A second elastic member, one end of the second elastic member acts on the inner wall of the upper built-in space, the acting direction is vertical, and the other end acts on the contact block to provide a force for the contact block to move upward and reset, so that the contact block cancels abutting against the shaft block, and drives the first top block to move downward and reset through the first connecting rod and leave the upper built-in space and enter the receiving groove.

[0013] For example, a C-shaped hook with anti-dropping performance provided by at least one embodiment of the present disclosure further includes: A second top block, the second top block is arranged to slide up and down on the upper beam portion, the first top block is located on one side of the second top block close to the opening direction of the receiving groove, and the first top block and the second top block are used to be sequentially abutted by the outer cylindrical surface of the coil during the loading process and sequentially driven to move upward; A third elastic member, one end of the third elastic member acts on the upper wall of the upper built-in space, and the other end acts on the second top block, for elastically pushing the second top block downward so that the second top block leaves the upper built-in space and enters the receiving groove and presses against the outer cylindrical surface of the coil.

[0014] For example, a C-shaped hook with anti-dropping performance provided by at least one embodiment of the present disclosure further includes: A swing clamping member, the swing clamping member is swingably arranged on the upper beam portion, a vertical second strip-shaped guide groove is formed on the swing clamping member, the second strip-shaped guide groove coincides with the first strip-shaped guide groove in the thickness direction of the hook body, and the shaft block is simultaneously located in the first strip-shaped guide groove and the second strip-shaped guide groove; A second connecting rod, one end of the second connecting rod is swingably arranged on the second top block, and the other end is provided with a guide chute along the length direction of the second connecting rod; A third connecting rod, one end of the third connecting rod is arranged on the swing shaft of the swing clamping member, and the other end is slidably arranged in the guide chute. The swing clamping member is configured to, after being driven by the coil to move upward, synchronously drive the swing clamping member and the roller to swing towards the receiving groove through the second connecting rod and the third connecting rod, and is used to abut against the bottom edge portion of the coil after swinging.

[0015] The beneficial effects of the embodiments of the present invention are as follows: In the present invention, the C-shaped hook can conveniently accommodate the hollow columnar coil through the receiving groove of the hook body. The bottom support portion abuts against and supports the inner circle of the coil to provide basic support. The swinging rod member is arranged on the bottom support portion and realizes the swinging function by using the swinging shaft. When the bottom support portion supports the coil, the triggering portion moves downward due to the gravity of the coil, and drives the baffle to rise based on the lever principle. This linkage design of the triggering portion and the baffle can start to play the role of preventing detachment immediately when the coil is placed, changing the reliability of the traditional C-shaped hook that only relies on the friction between the hook body and the inner hole surface of the coil to maintain stability. When the crane operates with starting and stopping, shaking, turning and other conditions, the raised baffle can directly block the movement of the coil towards the opening direction of the receiving groove, effectively avoiding the product quality damage and safety accidents caused by the sliding and displacement of the coil. Moreover, the design of the swinging rod member based on the swinging shaft enables it to adapt to coils with different inner diameters, ensuring the stability of the coil during hoisting under various working conditions, and greatly improving the versatility and safety of the C-shaped hook. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments of the present invention. Obviously, the following described drawings are only some exemplary embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the content of the exemplary embodiments of the present invention and these drawings.

[0017] Figure 1 It is a schematic structural diagram of a C-shaped hook with anti-detachment performance in an embodiment of the present invention; Figure 2 For Figure 1 the internal structural diagram in the embodiment of Figure 3 For Figure 2 the partial enlarged structural diagram of part C in Figure 4 For Figure 2 the partial enlarged structural diagram of part A in Figure 5 For Figure 2 the partial enlarged structural diagram of part B in Figure 6 For Figure 1 another structural diagram (hiding the roller on one side) in the embodiment of Figure 7 For Figure 6 the partial enlarged structural diagram of part D in

[0018] In the figure: hook body - 1, upper beam part - 101, connecting part - 102, bottom support part - 103, accommodation groove - 104, lower internal space - 105, connecting groove - 106, first strip-shaped guiding groove - 107, upper internal space - 108, swinging rod member - 2, triggering part - 201, baffle - 3, first top block - 4, roller - 5, connecting rod assembly - 6, swinging rod - 601, first connecting rod - 602, shaft block - 7, contact block - 8, second elastic member - 9, second top block - 10, third elastic member - 11, swinging clamping member - 12, second strip-shaped guiding groove - 1201, second connecting rod - 13, guiding sliding groove - 1301, third connecting rod - 14, first elastic member - 15. Detailed implementation manners

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention.

[0020] For the sake of simplicity of the drawings, only the parts related to the invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, for the sake of simplicity and easy understanding of the drawings, in some figures, for components with the same structure or function, only one of them is schematically shown, or only one of them is marked. In this article, "one" not only means "only this one", but also means "more than one" situation, and "several" includes "two" and "more than two".

[0021] In this article, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0022] In the present invention, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "over", and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "below", "under", and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0023] In the description of this embodiment, the orientation or positional relationships such as "upper", "lower", "left", "right", etc. are based on the orientation or positional relationships shown in the drawings. They are only for the convenience of description and simplifying the operations, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0024] In addition, in the description of this application, the terms "first", "second", etc. are only used for distinguishing descriptions, and cannot be understood as indicating or implying relative importance.

[0025] As Figures 1 to 7 shown, it shows a C-shaped hook with anti-dropping performance in an embodiment of the present invention, which is used for hoisting a hollow columnar coil. The coil has an inner circle and an outer cylindrical surface. The hook body 1 of the C-shaped hook is composed of an upper beam portion 101, a connecting portion 102 and a bottom support portion 103 connected end to end in sequence, and they jointly enclose a laterally open receiving groove 104. When performing the hoisting operation of the hollow columnar coil, first control the device to move the hook body 1 to the side of the coil, so that the bottom support portion 103 accurately aligns with the inner circle of the coil. After the bottom support portion 103 extends into the inner circle, it starts to support the coil. The swinging rod 2 is swingably arranged on the bottom support portion 103 with a transverse swing axis as the center. Along the length direction of the swinging rod 2, a triggering portion 201 and a baffle 3 are provided. The two are respectively located on both sides of the swing axis of the swinging rod 2, and the baffle 3 is on the side of the triggering portion 201 close to the opening of the receiving groove 104. In the initial reset state, the height of the triggering portion 201 is higher than that of the baffle 3. As the bottom support portion 103 extends deeper into the inner circle to support the coil, the self-gravity of the coil acts on the triggering portion 201, causing the triggering portion 201 to move downward. Since the swinging rod 2 swings around the swing axis, the downward movement of the triggering portion 201 drives the baffle 3 to rise at the same time. When the baffle 3 rises to a certain height, it can just block the coil from falling off from the opening of the receiving groove 104. For example, when facing coils with different inner diameters, due to the swinging characteristics of the swinging rod 2, during the process of the bottom support portion 103 supporting the coil, the effective prevention of the coil from falling off can still be achieved through the linkage of the triggering portion 201 and the baffle 3. Just like in the continuous hoisting operations of multiple groups of hollow columnar coils with different inner diameters, this C-shaped hook can automatically adjust the position of the baffle 3 according to the inner diameter of the coil to achieve the anti-dropping function.

[0026] The C-shaped hook can conveniently accommodate the hollow columnar coil through the receiving groove 104 of the hook body 1. The bottom support part 103 abuts against and supports the inner ring of the coil to provide basic support. The swing rod 2 is arranged on the bottom support part 103 and realizes the swing function by using the swing shaft. When the bottom support part 103 supports the coil, the trigger part 201 moves downward due to the gravity of the coil, and drives the baffle 3 to rise based on the lever principle. This linkage design of the trigger part 201 and the baffle 3 can start to play the role of anti-dropping immediately when the coil is placed, changing the passive situation that the traditional C-shaped hook only relies on the friction between the hook body and the inner hole surface of the coil to maintain stability. When the crane operates with start-stop, shaking, turning and other conditions, the raised baffle 3 can directly block the movement of the coil towards the opening direction of the receiving groove 104, effectively avoiding the product quality damage and safety accidents caused by the sliding and displacement of the coil. Moreover, the design of the swing rod 2 based on the swing shaft enables it to adapt to coils with different inner diameters, ensuring the stability of the coil during the hoisting process under various working conditions, and greatly improving the versatility and safety of the C-shaped hook.

[0027] In some examples, an internal space 105 is arranged inside the bottom support part 103. The swing rod 2 is hinged in this space through a pin shaft to form a kinematic pair that can swing around a horizontal axis. The trigger part 201 of the swing rod 2 extends to the bottom of the receiving groove 104, and its end is designed as an arc-shaped contact surface that matches the contour of the inner ring of the coil. The baffle 3 is fixed on one side of the swing rod 2 close to the opening of the receiving groove 104, and is completely received in the internal space 105 in the natural reset state.

[0028] When the C-shaped hook hoists the coil, the bottom support part 103 is inserted into the inner ring of the coil, and the self-weight of the coil acts on the trigger part 201 through the inner ring. After being loaded, the trigger part 201 swings downward around the pin shaft, driving the baffle 3 to rotate upward. Under the guiding action of the communication groove 106, the baffle 3 extends out of the opening of the receiving groove 104 at a limited angle, such as <30°, to form a blocking structure. After the hoisting is completed, when the coil is removed, the trigger part 201 loses the load, and the swing rod 2 automatically resets under the action of gravity, and the baffle 3 falls back into the internal space 105.

[0029] The design of the internal space 105 and the accommodation of the baffle 3 avoid the interference problem caused by the exposure of the traditional anti-dropping device. In the non-hoisting state, the baffle 3 is completely hidden, and the C-shaped hook still maintains the standard geometric shape, which is convenient for cooperation with other hoisting equipment. This design is especially suitable for operations in narrow spaces, reducing the risk of component collision. The center-of-gravity offset design of the swing rod 2, such as using an asymmetric mass distribution, enables it to automatically maintain the reset state when there is no load. The rolling friction between the arc-shaped contact surface of the trigger part 201 and the inner ring of the coil can reduce the trigger resistance, ensuring that the anti-dropping function can be activated when the coil is slightly displaced. This mechanism does not require an external power source and realizes self-driving through gravity, simplifying the system complexity.

[0030] In some examples, a through-connecting groove 106 is provided on the top surface of the bottom bracket 103. The groove is in the shape of a long strip, horizontally passes through the bottom bracket 103 and connects the receiving groove 104 with the lower built-in space 105. The swinging rod 2 is hinged in the lower built-in space 105 through a transverse pin, and one end thereof close to the opening of the receiving groove 104 is fixedly connected to the baffle 3. The baffle 3 is in the shape of a rectangular plate, and both sides form a guide fit with the side walls of the connecting groove 106, and a limiting convex edge is provided on the side walls to limit the swing angle of the baffle 3.

[0031] When the bottom support part 103 supports the coil, the trigger part 201 swings downward due to the pressure of the coil, driving the baffle 3 to rotate upward around the pin. When the baffle 3 rises in the connecting groove 106, the limiting convex edges of the two side walls limit its swing angle, ensuring that the baffle 3 extends out of the connecting groove 106 at an angle of 45° to form a blocking surface for the coil. After the lifting is completed, the trigger part 201 loses the load and resets, and the baffle 3 falls back along the connecting groove 106 to the lower built-in space 105, and its top surface is flush with the top surface of the bottom support part 103 to avoid affecting the next lifting operation.

[0032] The two side walls of the connecting groove 106 form physical stops through the limiting edges, which control the maximum swing angle of the baffle 3 to 60°, ensuring that it can effectively prevent the coil from falling off, and avoiding interference with the outer cylindrical surface of the coil due to excessive swinging. The baffle 3 simultaneously realizes the composite motion of swinging and lifting in the connecting groove 106: the angle change is realized by swinging along the pin shaft, and the position adjustment is realized by lifting along the groove body. This design eliminates the radial shaking problem of the traditional swinging mechanism through the guiding effect of the side wall of the groove body, and effectively improves the reliability of the anti-falling structure. The connecting groove 106 serves as the only channel between the accommodating groove 104 and the lower built-in space 105. The moving parts of the anti-falling mechanism are concentrated inside the bottom support part 103. Compared with the external limiting structure, it reduces the number of external protruding parts and reduces the risk of collision with other equipment during the lifting process. It is particularly suitable for intensive lifting operations in multi-layer shelf storage environments.

[0033] In some examples, the swinging lever 2 is hinged to the bottom bracket 103 through a transverse pin, forming a lever structure that can swing around the hinge point. The lever adopts an asymmetric design, and a counterweight section is set on the side close to the baffle 3, so that the overall center of gravity is located on the side of the hinge point that is biased toward the baffle 3. When there is no external force, the swinging lever 2 naturally maintains the reset state under the action of its own gravity torque, at which time the trigger part 201 extends upward, and the baffle 3 is stored downward in the internal space of the bottom bracket 103. When the bottom support 103 supports the coil, the inner circle of the coil presses down the trigger part 201, and the torque at the end of the trigger part 201 is greater than the gravity torque, driving the swing rod 2 to rotate around the hinge point, driving the baffle 3 to rise to the blocking position. After unloading, the trigger part 201 loses the pressure of the coil, and the gravity torque drives the swing rod 2 to automatically reset, so that the baffle 3 falls back to the initial storage state. The whole process does not require an additional reset device.

[0034] Automatic reset is achieved by offsetting the center of gravity of the swinging rod 2, eliminating the need for external power components such as springs and hydraulics, avoiding problems such as elastic fatigue and seal failure, enhancing the reliability of the mechanism under complex working conditions, and being particularly suitable for industrial environments with high dust and large temperature differences. The traditional reset mechanism is eliminated, reducing the number of moving parts and the complexity of machining and assembly. The pure mechanical structure design driven by the center of gravity simplifies the motion logic of the swinging rod 2, reducing functional abnormalities caused by component failures and significantly improving the long-term use stability. The stable moment generated by the center of gravity offset can counteract the inertial impact caused by the crane's swaying, starting, and stopping during the hoisting process, reducing the misoperation of the swinging rod 2. Even in the event of accidental vibration, the baffle 3 can still maintain the correct position under the action of the center of gravity, preventing the anti-detachment function from failing due to vibration.

[0035] In some examples, the upper beam portion 101 is provided with a vertically guided sliding channel, and the first top block 4 is embedded in the channel and can slide vertically up and down. The roller 5 is installed on the shaft sleeve through a rotating shaft, and the shaft sleeve cooperates with another vertically guided structure of the upper beam portion 101 to achieve the lifting movement and free rotation of the roller 5. One end of the link assembly 6 is hinged to the top of the first top block 4, and the other end extends above the rotating shaft of the roller 5, forming a lever transmission structure. When the C-shaped hook approaches the coil, the outer cylindrical surface of the coil first contacts the first top block 4 and pushes it upward along the guiding channel. The upward movement of the first top block 4 drives the link assembly 6 to rotate around the fulcrum through the hinge point, causing the other end of the link assembly 6 to press down on the shaft sleeve of the roller 5, prompting the roller 5 to move downward along the guiding structure until its outer peripheral surface fits against the outer cylindrical surface of the coil. At this time, the roller 5 rotates as the coil moves, forming a rolling contact state. After the hoisting is completed and the coil is removed, the first top block 4 and the roller 5 return to their initial positions under the action of gravity or the reset mechanism.

[0036] The rolling contact between the roller 5 and the outer cylindrical surface of the coil converts the traditional sliding friction into rolling friction, significantly reducing the risk of scratching the outer cylindrical surface caused by relative sliding during the hoisting process. At the same time, the circumferential displacement of the coil is effectively suppressed through the rolling resistance, improving the overall limiting accuracy. Each component is integrated into the internal guiding structure of the upper beam portion 101, avoiding external protruding designs and reducing the risk of interference with surrounding equipment during the hoisting process.

[0037] In some examples, the connecting rod assembly 6 is further refined. The middle section of the swing rod 601 is hinged to a preset hinge seat on the upper beam portion 101 through a pin shaft, forming a flexibly swingable connection. One end of the first connecting rod 602 is hinged to a hinge seat at the top of the first top block 4, and the other end is hinged to the end of the swing rod 601 away from the roller 5. When the C-shaped hook approaches the coil for hoisting operations, the outer cylindrical surface of the coil pushes the first top block 4 to move upward along the vertical guiding channel of the upper beam portion 101. The upward movement of the first top block 4 drives the first connecting rod 602 to move upward. Since the first connecting rod 602 is hinged to the swing rod 601 and the middle section of the swing rod 601 is hinged to the upper beam portion 101, the movement of the first connecting rod 602 causes the swing rod 601 to swing around its middle hinge point. When the swing rod 601 swings, its end close to the roller 5 moves downward and directly pushes against the bushing of the roller 5, causing the roller 5 to move downward along another vertical guiding structure of the upper beam portion 101 until the roller 5 is in close contact with the outer cylindrical surface of the coil, forming a rolling abutment. After the hoisting is completed and the coil is removed, the first top block 4 moves downward under the action of gravity, driving the first connecting rod 602 to descend, and then causing the swing rod 601 to swing in the reverse direction. The roller 5 rises back to its initial position under the action of gravity or a reset structure.

[0038] The connecting rod assembly composed of the swing rod 601 and the first connecting rod 602 utilizes the lever principle to amplify and effectively transmit the small displacement of the first top block 4. Compared with a simple direct connection structure, it can more precisely control the downward movement stroke of the roller 5, ensuring that the roller 5 can just right contact the outer cylindrical surface of the coil and provide an appropriate abutting force under different coil outer diameters, improving the accuracy and stability of the coil limit. This multi-link hinged structure disperses the stress generated during the hoisting process. During frequent hoisting operations, even when subjected to a large impact force, each connecting rod and hinge point can cooperate to share the load, reducing the stress on individual components. Compared with an integral rigid structure, it greatly improves the mechanical reliability and service life of the connecting rod assembly and reduces the probability of failures.

[0039] In some examples, a first strip-shaped guiding groove 107 extending vertically is formed on the side wall of the upper beam portion 101, and the shaft block 7 is fitted into the groove and can slide vertically along the groove body. The roller 5 is installed on the outside of the shaft block 7 through a rotating shaft, and its outer peripheral surface faces the opening direction of the receiving groove 104. The end of the swing rod 601 away from the first connecting rod 602 is hinged to the contact block 8, and the bottom surface of the contact block 8 is designed as an inclined surface corresponding to the mating inclined surface on the top surface of the shaft block 7. When the first top block 4 is pushed upward by the coil material, the swing rod 601 is driven by the first connecting rod 602 to rotate around the middle hinge point. The contact block 8 swings downward along with the swing rod 601, and the inclined surface of its bottom surface fits with the inclined surface of the top surface of the shaft block 7, pushing the shaft block 7 to slide down along the first strip-shaped guide groove 107. The shaft block 7 drives the roller 5 to move downward synchronously until the outer peripheral surface of the roller 5 abuts against the outer cylindrical surface of the coil material. At this time, the roller 5 can rotate freely around the rotating shaft to adapt to the displacement during the hoisting process of the coil material. After unloading, the contact block 8 swings upward along with the swing rod 601 and disengages from the shaft block 7, and the shaft block 7 moves upward and resets along the guide groove under the action of the reset mechanism.

[0040] The first strip-shaped guide groove 107 provides stable rigid guidance for the shaft block 7 in the vertical direction, converts the swing displacement of the swing rod 601 into the linear motion of the shaft block 7, effectively avoids the shaking problem easily occurring in the traditional non-guided structure, and ensures that the roller 5 can stably abut against the outer cylindrical surface of the coil material. The inclined surface design of the contact block 8 optimizes the force transmission direction, converts the tangential force of the swing rod 601 into the normal driving force of the shaft block 7, and improves the transmission efficiency. The rigid connection between the shaft block 7 and the roller 5 ensures that the roller 5 can maintain a stable posture when abutting against the coil material, and its rotating shaft is perpendicular to the tangent direction of the outer cylindrical surface of the coil material, reducing the rolling friction coefficient and minimizing the wear of the outer cylindrical surface of the coil material. The limiting effect of the guide groove prevents the radial deviation of the roller 5.

[0041] In some examples, an upper internal space 108 is provided inside the upper beam portion 101, and the connecting rod assembly 6 is integrally integrated into this space to form a closed transmission structure. The first strip-shaped guide groove 107 penetrates the bottom wall of the upper internal space 108, and the upper end of the shaft block 7 extends into the space and is connected to the first elastic member 15. The first elastic member 15 is a compression spring, with one end fixed to the bottom wall of the guide groove 107 and the other end abutting against the bottom surface of the shaft block 7, pushing the shaft block 7 upward in the natural state. The contact block 8 is hinged to the end of the swing rod 601 through a pin shaft, and its back is connected to the second elastic member 9. The second elastic member 9 is a tension spring, with one end fixed to the inner wall of the top of the upper internal space 108 and the other end acting on the top surface of the contact block 8 to provide an upward reset pulling force. When the coiled material pushes the first top block 4 upward, the first connecting rod 602 drives the swing rod 601 to swing downward. The contact block 8 moves downward against the pulling force of the second elastic member 9, pushing the shaft block 7 to compress the first elastic member 15 and slide downward along the guide groove 107 until the roller 5 abuts against the outer cylindrical surface of the coiled material. After unloading, the elastic force of the first elastic member 15 drives the shaft block 7 to move upward. At the same time, the second elastic member 9 pulls the contact block 8 to swing upward, causing the contact block 8 to disengage from the shaft block 7. The reset of the contact block 8 drives the first top block 4 to move downward through the first connecting rod 602, so that it leaves the upper built-in space 108 and extends into the receiving groove 104, preparing for the next lifting. The first elastic member 15 and the second elastic member 9 respectively provide the reset power for the shaft block 7 and the contact block 8, without relying on gravity or external drive, ensuring reliable reset under non-vertical working conditions such as horizontal lifting. This design solves the problem that the traditional mechanical reset structure is limited by the installation angle, making the C-shaped hook applicable to multi-angle lifting scenarios and improving the reset reliability. The setting of the elastic members can absorb the instantaneous impact force generated by the shaking of the coiled material during lifting: the first elastic member 15 buffers the rigid contact between the shaft block 7 and the contact block 8, reducing the impact pressure of the roller 5 on the outer cylindrical surface of the coiled material; the second elastic member 9 balances the swing inertia of the swing rod 601, avoiding the hard collision between the first top block 4 and the coiled material.

[0042] In some examples, on the upper beam portion 101, a second top block 10 parallel to the first top block 4 is provided, and both can move up and down along the vertical direction. The first top block 4 is close to the opening side of the receiving groove 104, while the second top block 10 is located at a relatively inner position. A third elastic member 11, usually a compression spring, is installed between the upper wall of the upper built-in space 108 of the upper beam portion 101 and the second top block 10.

[0043] When performing the coiled material loading operation, the outer cylindrical surface of the coiled material first contacts and pushes the first top block 4 upward. The first top block 4 drives the swing rod 601 to swing through the first connecting rod 602, and then the roller 5 moves downward to roll and abut against the outer cylindrical surface of the coiled material. As the coiled material continues to penetrate into the receiving groove 104, its outer cylindrical surface contacts the second top block 10 and pushes it upward, compressing the third elastic member 11. When the coiled material is loaded in place, during the lifting process, the elastic force of the third elastic member 11 drives the second top block 10 to move downward, so that it leaves the upper built-in space 108 and enters the receiving groove 104, and tightly presses against the outer cylindrical surface of the coiled material, acting together with the bottom support portion 103 below and the roller 5 on the outside to stabilize the position of the coiled material. After the lifting is completed and the coiled material is removed, the first top block 4 and the second top block 10 return to their initial positions under the action of their respective reset mechanisms, and the second top block 10 is reset by the elastic force of the third elastic member 11.

[0044] The second top block 10 works in cooperation with the first top block 4 to form a double limiting structure. During the coil loading process, they are successively pushed upward, effectively slowing down the speed and impact force when the coil enters the receiving groove 104, and reducing the offset risk caused by excessive speed. During hoisting, the second top block 10 presses against the outer cylindrical surface of the coil under the action of the third elastic member 11, and cooperates with the roller 5 and the bottom support portion 103 to limit the coil from multiple directions, greatly improving the stability of the coil during hoisting. Compared with the structure with only the first top block 4, the displacement deviation is reduced. The third elastic member 11 plays a buffering role during the coil loading and hoisting processes. During loading, it buffers the impact force received by the second top block 10 to avoid damage to the coil surface caused by rigid collision; In some examples, a swinging clamping member 12 is hinged to the outside of the upper beam portion 101, and a vertical second strip-shaped guiding groove 1201 is formed on its surface, which coincides with the first strip-shaped guiding groove 107 in the thickness direction of the hook body. The shaft block 7 is simultaneously embedded in the composite guiding channel formed by the two. The top of the second top block 10 is hinged to the second connecting rod 13 through a pin shaft, and a guiding sliding groove 1301 along the length direction is formed at the end thereof. One end of the third connecting rod 14 is fixed to the swinging shaft of the swinging clamping member 12, and the other end is embedded in the guiding sliding groove 1301 to form a sliding hinge joint.

[0045] When the coil is loaded, the outer cylindrical surface first pushes the first top block 4 to trigger the roller 5 to abut, and then continues to push the second top block 10 upward when it goes deeper. The upward movement of the second top block 10 drives the third connecting rod 14 through the second connecting rod 13. Due to the limiting effect of the guiding sliding groove 1301, the swinging clamping member 12 is forced to swing towards the receiving groove 104 around the hinge point. At this time, the shaft block 7 moves synchronously with the swinging of the swinging clamping member 12 under the constraint of the double guiding grooves, causing the roller 5 to deflect towards the side of the coil while moving downward. Finally, the front end of the swinging clamping member 12 abuts against the bottom edge portion of the coil, and the outer peripheral surface of the roller 5 fits against the outer cylindrical surface, forming a multi-point contact limit. After unloading, each component returns to its original position under the action of the elastic member, and the swinging clamping member 12 returns to its initial vertical state.

[0046] Through the synchronous swinging of the swinging clamping member 12 and the roller 5, a composite constraint of "abutting against the bottom edge portion + rolling limit of the outer cylindrical surface" is constructed. Compared with single-plane contact, it can effectively inhibit the rollover and circumferential sliding of the coil during hoisting. The design of the edge portion of the swinging clamping member 12 abutting provides a directional frictional force for the characteristic that the bottom of the hollow coil is prone to slipping, significantly improving the reliability of the overall limit. The sliding hinge structure of the second connecting rod 13 and the third connecting rod 14 converts the vertical displacement of the second top block 10 into the angular swing of the swinging clamping member 12 and the horizontal movement of the shaft block 7, and can adapt to the position change of the bottom edge portion of coils with different diameters without a complex transmission mechanism. When the outer diameter of the coil increases, the swinging angle of the swinging clamping member 12 automatically increases to ensure effective contact with the bottom edge portion at all times, realizing the non-adjustable adaptation of full-specification coils.

[0047] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A C-type hook with anti-falling performance, used for hoisting hollow cylindrical coiled materials, the coiled materials have an inner circle and an outer cylindrical surface, characterized in that: include: A hook body (1), the hook body (1) comprising an upper beam portion (101), a connecting portion (102) and a bottom supporting portion (103) which are connected end to end in sequence, the upper beam portion (101), the connecting portion (102) and the bottom supporting portion (103) together enclose a receiving groove (104) opening toward the side, the bottom supporting portion (103) being located at the bottom of the receiving groove (104), the receiving groove (104) being used to receive a coil, and the bottom supporting portion (103) being used to abut against the inner ring and support the coil; A swinging rod (2), the swinging rod (2) being swingably arranged on the bottom supporting portion (103), the swinging axis being in a lateral direction, and a triggering portion (201) and a baffle (3) being arranged in a length direction of the swinging rod (2), the triggering portion (201) and the baffle (3) being respectively located on both sides of the swinging axis of the swinging rod (2), the baffle (3) being located on a side of the triggering portion (201) close to the opening direction of the containing groove (104), and when the swinging rod (2) is configured to be in a reset state, the height of the triggering portion (201) is higher than the height of the baffle (3), and after the bottom supporting portion (103) extends into the inner ring and supports the coiled material, the coiled material drives the triggering portion (201) to move downward, and at the same time drives the baffle (3) to rise, so as to prevent the coiled material from falling off from the opening of the containing groove (104).

2. A C-shaped hook with anti-falling performance according to claim 1, characterized in that: The bottom support portion (103) has a lower built-in space (105), the swinging rod (2) is swingably disposed in the lower built-in space (105), and the swinging rod (2) is configured such that, after being reset, the baffle (3) is located in the lower built-in space (105), and the trigger portion (201) extends out of the lower built-in space (105) and into the accommodating groove (104).

3. The C-shaped hook with anti-falling performance according to claim 1, characterized in that: A connecting groove (106) is provided on the top surface of the bottom support portion (103), and the connecting groove (106) is used to connect the containing groove (104) and the lower built-in space (105); the baffle plate (3) is swingably arranged on the swinging rod (2), and the baffle plate (3) is arranged to move up and down in the connecting groove (106), and the side walls on both sides of the connecting groove (106) are used to limit the swinging angle of the baffle plate (3).

4. The C-shaped hook with anti-falling performance according to claim 1, characterized in that: The overall center of gravity of the swing lever (2) is located on a side of the hinge point close to the baffle (3), so that the swing lever (2) can naturally be in a reset state when no external force is applied.

5. The C-shaped hook with anti-falling performance according to claim 1, characterized in that: Also includes: A first top block (4), the first top block (4) being arranged on the upper beam portion (101) in a lifting and sliding manner; A roller (5), the roller (5) being arranged on the upper beam portion (101) so as to be movable in a lifting manner and rotatable, the roller (5) being used for rolling contact with the outer cylindrical surface of the coil, A connecting rod assembly (6), one end of the connecting rod assembly (6) is hinged to the first top block (4), and the other end is located above the rotation axis of the roller (5), and the first top block (4) is configured to, after being abutted by the coil and driven to move upward, drive the roller (5) downward through the connecting rod assembly (6), so that the roller (5) rolls and abuts against the outer cylindrical surface of the coil.

6. A C-shaped hook with anti-falling performance according to claim 5, characterized in that: The connecting rod assembly (6) comprises: A swing rod (601), the middle section of the swing rod (601) being hinged on the upper beam portion (101); A first connecting rod (602), one end of the first connecting rod (602) is hinged to the first top block (4), and the other end is hinged to one end of the swing rod (601), and the first connecting rod (602) is configured to drive the swing rod (601) to swing after being driven upward by the first top block (4), so that the other end of the swing rod (601) pushes the roller (5) downward to move downward.

7. A C-shaped hook with anti-falling performance according to claim 6, characterized in that: The side wall of the upper beam portion (101) is provided with a first vertical strip-shaped guide groove (107), and further comprises: an axle block (7), the axle block (7) being slidably disposed in the first strip-shaped guide groove (107), and the roller (5) being rotatably disposed on the axle block (7); A contact block (8) is hingedly connected to one end of the swing rod (601) away from the first connecting rod (602), and is used for abutting against the shaft block (7) after being driven by the swing rod (601) to swing.

8. The C-shaped hook with anti-falling performance according to claim 7, characterized in that: The upper beam portion (101) has an upper built-in space (108), the connecting rod assembly (6) is located in the upper built-in space (108), and further comprises: a first elastic member (15), one end of the first elastic member (15) acting on the bottom wall of the first strip-shaped guide groove (107), and the other end of the first elastic member (15) acting on the shaft block (7), for elastically pushing the shaft block (7) upwards, and providing a force for the shaft block (7) to drive the roller (5) to reset upwards; A second elastic member (9), one end of the second elastic member (9) acts on the inner wall of the upper built-in space (108) in a vertical direction, and the other end acts on the contact block (8) to provide a force for the contact block (8) to move upward and reset, so that the contact block (8) and the shaft block (7) are no longer in contact, and the first top block (4) is driven by the first connecting rod (602) to move downward and reset, leaving the upper built-in space (108) and entering the accommodating groove (104).

9. The C-shaped hook with anti-falling performance according to claim 8, characterized in that: Also includes: a second top block (10), the second top block (10) being arranged on the upper beam portion (101) in a lifting and sliding manner, the first top block (4) being located on a side of the second top block (10) close to the opening direction of the receiving groove (104), the first top block (4) and the second top block (10) being used to be abutted against by the outer cylindrical surface of the coil in sequence during the loading process and being driven to move upward in sequence; A third elastic member (11), one end of the third elastic member (11) acts on the upper wall of the upper built-in space (108), and the other end acts on the second top block (10), and is used to elastically push the second top block (10) downward, so that the second top block (10) leaves the upper built-in space (108) and enters the containing groove (104) and presses against the outer cylindrical surface of the coil.

10. A C-shaped hook with anti-falling performance according to claim 9, characterized in that: Also includes: a swing clamp (12), the swing clamp (12) being swingably disposed on the upper beam portion (101), the swing clamp (12) being provided with a second vertical strip guide groove (1201), the second strip guide groove (1201) being overlapped with the first strip guide groove (107) in the thickness direction of the hook body (1), and the shaft block (7) being located in both the first strip guide groove (107) and the second strip guide groove (1201); A second connecting rod (13), one end of the second connecting rod (13) being swingably disposed on the second top block (10); A third connecting rod (14), one end of the third connecting rod (14) is arranged on the swing axis of the swing clamp (12), and the other end is provided with a guide groove (1301) along the length direction of the third connecting rod (14), and the other end of the second connecting rod (13) is slidably arranged in the guide groove (1301), and the swing clamp (12) is configured to, after being driven upward by the coil, synchronously drive the swing clamp (12) and the roller (5) to swing toward the receiving groove (104) through the second connecting rod (13) and the third connecting rod (14), and after swinging, is used to abut against the bottom edge of the coil.

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