A device for preventing outer ring of steel coil from being damaged during hoisting

Abstract

The present invention belongs to the technical field of crane hoisting, and relates to a device for preventing the outer ring of a steel coil from being damaged during hoisting, comprising a clamp body, clamp arms being fixed at both ends of the clamp body, a hook claw, a supporting assembly, and a pressing assembly, wherein the two hook claws are respectively fixed at the ends of the two clamp arms, the bottom ends of the hook claws are fixed with claw heads bent inward, the supporting assembly comprises a support frame and an arc-shaped support plate, a pressure block is fixed at the bottom of the arc-shaped support plate, the support frame is fixedly connected to the bent portion of the bottom end of the hook claw, and the pressing assembly comprises a pressure plate and a pressure rod. The present invention is provided with a supporting assembly and a pressing assembly, and the steel coil is clamped from the inner ring surface and the outer ring surface of the steel coil respectively by the supporting assembly and the pressing assembly, and at the same time, the supporting assembly and the pressing assembly will not be squeezed with the edge of the steel coil when the steel coil is hoisted, thereby effectively preventing the outer ring edge of the steel coil from being damaged during the hoisting process.

Description

Technical Field

[0001] The invention relates to the technical field of crane hoisting, in particular to a device for preventing outer rings of steel coils from being damaged during hoisting. Background Art

[0002] When lifting steel coils, it is usually necessary to connect an electric horizontal coil clamp to the steel cable of a crane, and the steel coil is clamped and fixed by the electric horizontal coil clamp. A sliding sleeve type anti-roll device is installed on the inner side of the clamp arm of the electric horizontal coil clamp, which is composed of a spring and a rubber bushing. However, during the normal lifting process of the steel coil, the outer ring of the steel coil, including the overflow edge, is still clamped. The overflow edge of the steel coil often appears at 105-405mm on the upper part of the bushing, and it is difficult to control the overflow edge of the steel coil. Each cold rolling mill will have a different degree of overflow edge of the steel coil. Therefore, it is difficult to avoid the electric horizontal coil clamp in the existing technology clamping the outer ring of the steel coil, which not only seriously affects the product quality and reduces the factory qualification rate of the steel coil, but also causes waste of manpower, money and materials, and has an adverse effect on controlling production costs. Therefore, it is necessary to avoid the clamp arm from clamping the overflow edge of the steel coil during the lifting process to prevent damage to the outer ring of the steel coil.

[0003] Chinese patent publication number CN115285841A discloses a steel coil crane lifting fixture and a crane including the same. The fixture comprises a mounting base and a lifting assembly, with the lifting assembly being mounted on the mounting base. When lifting the steel coil, the coil is clamped by a coil clamping plate to prevent displacement. Before clamping the coil, the first and second lifting fixtures are moved upwards to abut against a wedge-shaped push block before clamping the coil. However, this patent still has some drawbacks: the coil's outer ring can be easily damaged by pressure at the overflow edge during coil clamping. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: in order to solve the problem that the steel coil is damaged when the clamp arm clamps to the overflow edge of the outer ring of the steel coil during the lifting process, the present invention provides a device to prevent the outer ring of the steel coil from being damaged during lifting to solve the above problem.

[0005] The cam is fixedly mounted on two ends of the support frame, and the support frame is fixedly mounted on the support frame, and the support frame is fixed with a plurality of movable lids at two ends.

[0006] Preferably, the supporting assembly also includes an L-shaped rocker, a push plate, a slider, a push rod and a guard plate, the bending part of the L-shaped rocker is rotatably mounted on the support frame, one end of the L-shaped rocker is slidably abutted against the bottom of the pressure block, the other end of the L-shaped rocker is slidably abutted against the bottom of the push plate, one side of the push plate is vertically slidably mounted on the side of the pressure block, the slider is slidably mounted on the side of the support frame, the push rod is fixed to the lower end of the slider and is slidably connected to the upper surface of the push plate, the bottom of the guard plate is hinged to the upper end of the slider, and when the pressure block moves downward, it can push the push plate, slider, push rod and guard plate up through the L-shaped rocker.

[0007] Preferably, a U-shaped groove is provided on the side of the support frame, the slider is slidably installed in the U-shaped groove, and the opening direction of the U-shaped groove is set at an acute angle to the moving direction of the pressing block.

[0008] Preferably, the curvature of the upper surface of the guard plate is the same as the curvature of the upper surface of the arc-shaped supporting plate.

[0009] Preferably, a thrust spring is fixed between the arc-shaped supporting plate and the push plate, and when the pressure block moves downward, the thrust spring can be compressed, and when the pressure block moves upward, the thrust spring returns to its original position and pushes the push plate downward.

[0010] Preferably, the clamping assembly also includes a lifting ear, a lifting rod and a hanger, the lifting ear is fixed on the clamp body, a sliding groove is provided on the lifting ear, the lifting rod is slidably installed in the sliding groove, the two ends of the lifting rod are connected to the hanger, a waist-shaped hole is provided on the hanger, and the upper end of the pressure rod is slidably installed in the waist-shaped hole.

[0011] Preferably, a tension spring is fixed to the top of the hanger, and the other end of the tension spring is fixedly connected to the end of the suspension rod through a spring seat.

[0012] Preferably, the pressing plate is arranged in a downwardly curved arc shape, and a rubber layer is fixed to the side of the arc-shaped supporting plate, the guard plate and the pressing plate in contact with the steel coil.

[0013] Preferably, an infrared sensor switch is further installed at the upper end of the hook, and the infrared sensor switch is arranged toward the gap between the supporting component and the hook, and the infrared sensor switch is electrically connected to the clamp body.

[0014] The beneficial effects of the present invention are as follows: First, a supporting assembly and a clamping assembly are provided, and the steel coil is clamped from the inner and outer surfaces of the steel coil respectively by the supporting assembly and the clamping assembly. At the same time, when the steel coil is hoisted, the supporting assembly and the clamping assembly will not be squeezed with the edge of the steel coil, effectively preventing damage to the outer edge of the steel coil during the hoisting process. In addition, the curved support plate is first abutted against the steel coil for positioning, and then the contact area with the steel coil is increased by the guard plate, preventing the supporting assembly from damaging the steel coil during the hoisting process. Due to the inclined setting of the U-shaped groove, the curved support plate and guard plate of the supporting assembly can fit with the curved inner ring of the steel coil, improving the stability and practicality of the supporting assembly during the hoisting process.

[0015] Secondly, an infrared sensor switch is installed on the upper end of the hook, and the infrared sensor switch is set towards the gap between the supporting component and the hook. When the supporting component completely enters the inner ring of the steel coil, the edge of the steel coil will block the infrared sensor switch, and the clamp body receives the signal and stops working. At this time, the outer ring edge of the steel coil is just between the supporting component and the hook, which prevents the hook from squeezing the outer ring of the steel coil during the lifting process. At the same time, the supporting component also completely enters the inner ring of the steel coil. At this time, the crane lifts the clamp body upward, and the arc-shaped support plate and guard plate of the supporting component can bend and fit with the inner ring surface of the steel coil and cannot touch the edge of the steel coil, further preventing squeezing damage to the edge of the steel coil during the lifting process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a schematic structural diagram of a preferred embodiment of a device for preventing outer rings of steel coils from being damaged during hoisting according to the present invention;

[0018] Figure 2 It is a structural schematic diagram of a hook of a device for preventing outer ring of a steel coil from being damaged during hoisting according to the present invention;

[0019] Figure 3 It is a structural schematic diagram of a support frame of a device for preventing outer rings of steel coils from being damaged during hoisting according to the present invention;

[0020] Figure 4 It is a structural schematic diagram of an L-shaped seesaw of a device for preventing damage to the outer ring of a steel coil during hoisting according to the present invention;

[0021] Figure 5 The present invention is a structural schematic diagram of a hanger for preventing the outer ring of a steel coil from being damaged during hoisting.

[0022] Figure numerals: 1. Clamp body; 2. Clamp arm; 3. Hook; 4. Support assembly; 5. Clamping assembly; 6. Claw head; 7. Support frame; 8. Arc-shaped support plate; 9. Pressure block; 10. Pressure plate; 11. Pressure rod; 12. L-shaped rocker; 13. Push plate; 14. Slider; 15. Push rod; 16. Guard plate; 17. U-shaped groove; 18. Thrust spring; 19. Lifting ear; 20. Hanging rod; 21. Hanging bracket; 22. Slide groove; 23. Waist-shaped hole; 24. Tension spring; 25. Spring seat; 26. Infrared sensor switch. DETAILED DESCRIPTION

[0023] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0024] like Figures 1 to 5 As shown, the present invention provides an embodiment of a device for preventing the outer ring of a steel coil from being damaged during lifting, comprising a clamp body 1, clamp arms 2 being fixed at both ends of the clamp body 1, the clamp body 1 being used to drive the two clamp arms 2 to move closer to or away from each other, and further comprising a hook claw 3, a supporting assembly 4 and a clamping assembly 5, two hook claws 3 being provided, the two hook claws 3 being respectively fixed at the ends of the two clamp arms 2, and an inwardly bent claw head 6 being fixed at the bottom end of the hook claw 3.

[0025] The supporting assembly 4 is fixed on the upper side of the claw head 6 and away from the hook 3. The supporting assembly 4 includes a support frame 7 and an arc-shaped support plate 8. A pressure block 9 is fixed to the bottom of the arc-shaped support plate 8. The pressure block 9 is slidably installed in the support frame 7. The support frame 7 is fixedly connected to the bottom curved part of the hook 3.

[0026] The supporting assembly 4 also includes an L-shaped rocker 12, a push plate 13, a slider 14, a push rod 15 and a guard plate 16. The bending part of the L-shaped rocker 12 is rotatably mounted on the support frame 7. One end of the L-shaped rocker 12 slides and abuts against the bottom of the pressure block 9, and the other end of the L-shaped rocker 12 slides and abuts against the bottom of the push plate 13. One side of the push plate 13 is vertically slidably mounted on the side of the pressure block 9. The slider 14 is slidably mounted on the side of the support frame 7. The push rod 15 is fixed to the lower end of the slider 14 and is slidably connected to the upper surface of the push plate 13. The bottom of the guard plate 16 is hinged to the upper end of the slider 14. The curvature of the upper surface of the guard plate 16 is the same as the curvature of the upper surface of the arc-shaped support plate 8.

[0027] When the pressure block 9 moves downward, the push plate 13, the slider 14, the push rod 15 and the guard plate 16 can be pushed upward through the L-shaped rocker 12. A U-shaped groove 17 is provided on the side of the support frame 7, and the slider 14 is slidably installed in the U-shaped groove 17. The opening direction of the U-shaped groove 17 is set at an acute angle to the moving direction of the pressure block 9.

[0028] A thrust spring 18 is fixed between the arc-shaped supporting plate 8 and the push plate 13. When the pressure block 9 moves downward, the thrust spring 18 can be compressed. When the pressure block 9 moves upward, the thrust spring 18 returns to its original position and pushes the push plate 13 downward.

[0029] The principle of the supporting assembly 4 is as follows: when not hoisting, the thrust spring 18 can press the push plate 13 downward, so that the L-shaped rocker 12 on the lower surface of the push plate 13 is pressed downward, and then the pressure block 9 is lifted up through the other end of the L-shaped rocker 12. At this time, the arc-shaped support plate 8 on the pressure block 9 is higher than the guard plates 16 on both sides thereof. When hoisting is performed, the arc-shaped support plate 8 first contacts the steel coil during the upward movement and pushes the pressure block 9 to move downward. When the pressure block 9 moves downward, the push plate 13 is lifted up through the L-shaped rocker 12, thereby making the slider 14 and the guard plate The plate 16 moves up along the U-shaped groove 17 until the arc-shaped support plate 8 and the guard plate 16 abut against the steel coil at the same time. During this process, the arc-shaped support plate 8 is first abutted against the steel coil for positioning, and then the guard plate 16 is used to increase the contact area with the steel coil to prevent the supporting component 4 from damaging the steel coil during lifting. Since the U-shaped groove 17 is tilted, the arc-shaped support plate 8 and the guard plate 16 of the supporting component 4 can fit with the inner circle of the arc-shaped steel coil, which improves the stability and practicality of the supporting component 4 during lifting.

[0030] The clamping assembly 5 includes a pressure plate 10 and a pressure rod 11. The pressure rod 11 is rotatably mounted on the clamp body 1. The pressure plate 10 is hinged to the lower end of the pressure rod 11. The arc-shaped support plate 8 and the pressure plate 10 clamp the steel coil from the inner and outer ring surfaces of the steel coil respectively.

[0031] The clamping assembly 5 also includes a lifting ear 19, a lifting rod 20 and a hanger 21. The lifting ear 19 is fixed on the clamp body 1. A slide groove 22 is provided on the lifting ear 19. The lifting rod 20 is slidably installed in the slide groove 22. The two ends of the lifting rod 20 are connected to the hanger 21. A waist-shaped hole 23 is provided on the hanger 21. The upper end of the pressure rod 11 is slidably installed in the waist-shaped hole 23.

[0032] After the steel coil is put down, the tension spring 24 can release the pressure plate 10 after it is reset, which is convenient for lifting subsequent steel coils.

[0033] The pressure plate 10 is set in a downward curved arc shape, and the arc support plate 8, the guard plate 16 and the pressure plate 10 that are in contact with the steel coil are all fixed with a rubber layer to prevent the steel coil from slipping during the lifting process. At the same time, the surface of the steel coil is protected to prevent indentation damage on the surface of the steel coil during the lifting process.

[0034] The upper end of the hook 3 is also equipped with an infrared sensor switch 26, which is set towards the gap between the supporting component 4 and the hook 3. The infrared sensor switch 26 is electrically connected to the clamp body 1. Before hoisting the steel coil, the claw head 6 at the lower end of the hook 3 is first aligned with the center of the steel coil. Then the clamp body 1 drives the two clamp arms 2 to move closer to each other, so that the two hooks 3 are close to each other, so that the supporting component 4 fixed on the claw head 6 is moved to the inner ring of the steel coil. When the supporting component 4 completely enters the inner ring of the steel coil, the edge of the steel coil will contact the infrared sensor. The external sensing switch 26 causes an obstruction, and the clamp body 1 receives the signal to stop working. At this time, the outer ring edge of the steel coil is just between the supporting component 4 and the hook 3, preventing the hook 3 from squeezing the outer ring of the steel coil during the lifting process. At the same time, the supporting component 4 also completely enters the inner ring of the steel coil. At this time, the crane lifts the clamp body 1 upward, and the arc-shaped support plate 8 and guard plate 16 of the supporting component 4 can bend and fit with the inner ring surface of the steel coil and cannot touch the edge of the steel coil, further preventing the edge of the steel coil from being squeezed and damaged during the lifting process.

[0035] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0036] With the above-described preferred embodiments of the present invention as a guide, and with reference to the above description, relevant personnel are fully capable of making various changes and modifications without departing from the technical scope of this invention. The technical scope of this invention is not limited to the contents of the specification and must be determined according to the scope of the claims.

Claims

1. A device for preventing the outer ring of a steel coil from being damaged during hoisting, comprising a clamp body (1), clamp arms (2) being fixed at both ends of the clamp body (1), the clamp body (1) being used to drive the two clamp arms (2) to move closer to or away from each other, and characterized in that: The invention also includes a hook claw (3), a supporting assembly (4) and a pressing assembly (5), wherein two hook claws (3) are provided, and the two hook claws (3) are respectively fixed to the ends of the two clamp arms (2), and the bottom end of the hook claw (3) is fixed with a claw head (6) bent inward, and the supporting assembly (4) is fixed on the upper side of the claw head (6) and away from the hook claw (3), and the supporting assembly (4) includes a support frame (7) and an arc-shaped support plate (8), and the bottom of the arc-shaped support plate (8) is fixed with a pressing block ( 9), the pressure block (9) is slidably mounted in the support frame (7), the support frame (7) is fixedly connected to the bottom bending portion of the hook (3), the clamping assembly (5) includes a pressure plate (10) and a pressure rod (11), the pressure rod (11) is rotatably mounted on the clamp body (1), the pressure plate (10) is hinged to the lower end of the pressure rod (11), the arc-shaped support plate (8) and the pressure plate (10) clamp the steel coil from the inner ring surface and the outer ring surface of the steel coil respectively; The clamping assembly (5) further comprises a lifting ear (19), a suspension rod (20) and a hanger (21), wherein the lifting ear (19) is fixed to the clamp body (1), a slide groove (22) is provided on the lifting ear (19), the suspension rod (20) is slidably mounted in the slide groove (22), both ends of the suspension rod (20) are connected to the hanger (21), a waist-shaped hole (23) is provided on the hanger (21), and the upper end of the pressure rod (11) is slidably mounted in the waist-shaped hole (23); A tension spring (24) is fixed to the top of the hanger (21), and the other end of the tension spring (24) is fixedly connected to the end of the suspension rod (20) via a spring seat (25).

2. The device for preventing outer ring of a steel coil from being damaged during hoisting according to claim 1, characterized in that: The supporting assembly (4) further comprises an L-shaped seesaw (12), a push plate (13), a slider (14), a push rod (15) and a guard plate (16). The bending portion of the L-shaped seesaw (12) is rotatably mounted on the support frame (7). One end of the L-shaped seesaw (12) is in sliding contact with the bottom of the pressure block (9). The other end of the L-shaped seesaw (12) is in sliding contact with the bottom of the push plate (13). One side of the push plate (13) is vertically slidably mounted on the pressure block (9). The side of the block (9), the slider (14) is slidably mounted on the side of the support frame (7), the push rod (15) is fixed to the lower end of the slider (14) and is slidably connected to the upper surface of the push plate (13), the bottom of the guard plate (16) is hinged to the upper end of the slider (14), and when the pressure block (9) moves downward, it can push the push plate (13), the slider (14), the push rod (15) and the guard plate (16) to move upward through the L-shaped rocker (12).

3. The device for preventing outer ring of a steel coil from being damaged during hoisting according to claim 2, characterized in that: A U-shaped groove (17) is provided on the side of the support frame (7), and the slider (14) is slidably installed in the U-shaped groove (17). The opening direction of the U-shaped groove (17) and the moving direction of the pressing block (9) are arranged at an acute angle.

4. The device for preventing outer ring of a steel coil from being damaged during hoisting according to claim 2, characterized in that: The curvature of the upper surface of the guard plate (16) is the same as the curvature of the upper surface of the arc-shaped support plate (8).

5. The device for preventing outer ring of steel coil from being damaged during hoisting according to claim 2, characterized in that: A thrust spring (18) is fixed between the arc-shaped support plate (8) and the push plate (13). When the pressure block (9) moves downward, the thrust spring (18) can be compressed. When the pressure block (9) moves upward, the thrust spring (18) is reset to push the push plate (13) downward.

6. The device for preventing outer ring of steel coil from being damaged during hoisting according to claim 1, characterized in that: The pressing plate (10) is arranged in a downwardly curved arc shape, and a rubber layer is fixed to the side of the arc-shaped supporting plate (8), the guard plate (16) and the pressing plate (10) that contacts the steel coil.

7. The device for preventing outer ring of a steel coil from being damaged during hoisting according to claim 1, characterized in that: An infrared sensor switch (26) is also installed at the upper end of the hook (3). The infrared sensor switch (26) is arranged toward the gap between the supporting component (4) and the hook (3). The infrared sensor switch (26) is electrically connected to the clamp body (1).

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