A sling

Abstract

The present invention discloses a sling, which relates to the technical field of roller transfer and solves the technical problems of inconvenience and low efficiency in lifting rollers with slings. The sling includes an outer beam, an inner beam, two openers and closeers respectively arranged at the two ends of the inner beam, and two timing mechanisms respectively arranged at the two ends of the inner beam. The inner beam is vertically movably arranged inside the outer beam, a lifting hole is opened at the top of the inner beam, and pins are respectively arranged at the two ends of the inner beam. The opener and closeer includes a pressure plate, a hand joint, and a manipulator connected in sequence. The pin is passed through the pressure plate, and the manipulator is rotatably connected to the outer beam. The hand joint is used to close the manipulator when the inner beam moves upward relative to the outer beam, and to open the manipulator when the inner beam moves downward relative to the outer beam. The timing mechanism changes from two states of unlocking the pins and restoring the pins when pushed once by a rising lifting target. Through automatic clamping and automatic release, the operation steps of removing and hanging the slings are eliminated and the timing mechanism has a self-locking function, which increases lifting efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of roller transfer, in particular to a sling. Background Art

[0002] In the cold rolling mill's multi-roller mill, the rolls are still hoisted using an old-fashioned lifting beam, with lifting straps attached to both ends. When hoisting the rolls, workers are required to constantly attach and remove the lifting straps at both ends. Since the rolls need to be placed on the roll stand, workers must go around the roll stand to attach the lifting straps to the other side, which is inconvenient and reduces hoisting efficiency. Summary of the Invention

[0003] The present application provides a lifting device, which solves the technical problems of inconvenience and low efficiency in lifting rollers by lifting belts in the related art.

[0004] The present application provides a lifting device, including an outer beam, an inner beam, two openers and two timing mechanisms. The inner beam can be vertically movably arranged inside the outer beam. A lifting hole is opened on the top of the inner beam. Pins are respectively provided at both ends of the length of the inner beam. The two openers are respectively arranged at the two ends of the length of the inner beam. The opener includes a pressure plate, a hand joint and a manipulator connected in sequence. The pin is passed through the pressure plate. The manipulator is rotatably connected to the outer beam. The hand joint is used to close the manipulator when the inner beam moves up compared with the outer beam and to open the manipulator when the inner beam moves down compared with the outer beam. The two timing mechanisms are respectively arranged at both ends of the length of the inner beam. The timing mechanism changes from the two states of releasing the lock of the pin shaft and restoring the lock of the pin shaft once when it is pushed once by the rising lifting target.

[0005] Optionally, double-layer plates are set at both ends of the length of the outer beam, including an outer plate located on the outside and an inner plate close to the center of the outer beam. The outer plate and the inner plate are set in parallel with each other, and the pressure plate and hand joint are both set in the interval area between the outer plate and the inner plate. The timing mechanism is installed on the side of the outer plate away from the inner plate.

[0006] Optionally, the timing mechanism includes a contact assembly, a strong magnetic turntable, a hook and a connecting rod;

[0007] The contact assembly includes a guide seat, a tentacle, an elastic member, and a paddle. The guide seat is fixedly connected to the outer plate. The guide seat is located in a first guide groove inside the tentacle. The tentacle can move vertically and the lower edge of the tentacle can move below the lower edge of the outer plate. The two ends of the elastic member are respectively connected to the top of the tentacle and the paddle. The paddle and the tentacle are rotatably connected at a first point. The paddle is located on the side of the tentacle away from the outer plate.

[0008] The strong magnetic turntable is rotatably mounted on the outer plate. The strong magnetic turntable includes a plurality of magnets arranged in sequence along the circumference. The two magnetic poles of the magnets are respectively arranged toward the center of the disk and the outside of the disk. The magnetic poles are arranged cyclically along the circumference of the strong magnetic turntable, with the N pole and the S pole being arranged cyclically. When the tentacles are pushed once to pick up the target, the paddle will move the strong magnetic turntable once.

[0009] The hook includes a hook plate and a linkage plate connected to the hook plate. The hook plate is provided with a hook groove on a side opposite to the linkage plate. An end of the linkage plate close to the hook plate is rotatably connected to the outer plate at a second point. When the hook groove is directly above the pin shaft, the hook locks the pin shaft. When the hook groove deviates from the pin shaft, the hook and the pin shaft are separated. A matching electrode is installed on the side of the linkage plate facing the strong magnetic turntable. The matching electrode is used to attract or repel the strong magnetic turntable. The linkage plate is provided with a second guide groove.

[0010] The top end of the connecting rod is rotatably connected to the pin shaft, the connecting rod is provided with a third guide groove, the connecting rod is equipped with a mover, and the mover is movably installed in the second guide groove and the third guide groove.

[0011] Optionally, the strong magnetic turntable has rotational resistance compared to the outer plate when it rotates, the rotational resistance is greater than the repulsive force when the matching electrode and the strong magnetic turntable repel each other, and the rotational resistance is less than the paddle force on the strong magnetic turntable.

[0012] Optionally, the plectrum includes a plectrum head, the plectrum head is closer to the strong magnetic turntable than the first point, and the connection point between the elastic member and the plectrum is located on a side of the first point away from the plectrum;

[0013] The dial head has an upper edge and a lower edge, the upper edge of the dial head is arranged in a plane, and the lower edge of the dial head is arranged in an arc surface, and the plane and the arc surface intersect at a point and the point is far away from the first point.

[0014] Optionally, in the width direction of the outer beam, the size of the lower edge of the tentacle is larger than the size of the upper edge of the tentacle.

[0015] Optionally, the elastic member is made of rubber.

[0016] Optionally, the sling is provided with guard plates at both ends of the length of the outer beam, the guard plates are arranged in parallel with the outer plates, and the timing mechanism is installed between the guard plates and the outer plates.

[0017] Optionally, the manipulator includes a first hand and a second hand, and the pressure plates located at one end of the inner beam are arranged in pairs, and the two pressure plates are arranged at an interval;

[0018] The hand joint includes a first joint plate and a second joint plate, the middle portion of the two joint plates are rotatably connected by a first axis, the top end of the first joint plate is placed between the two pressure plates, the top end is connected to the pressure plates by the second axis, and the bottom end is connected to the first hand by the third axis, the top end of the second joint plate is placed between the two pressure plates, the top end is connected to the pressure plates by the fourth axis, and the bottom end is connected to the second hand by the fifth axis;

[0019] The pressure plate is provided with a first groove for the second shaft to pass through and a second groove for the fourth shaft to pass through, the first joint plate is provided with a third groove for the third shaft to pass through, and the second joint plate is provided with a fourth groove for the fifth shaft to pass through. The first groove and the second groove are symmetrically arranged, and the distance between the top end of the first groove and the top end of the second groove is smaller than the distance between the bottom end of the first groove and the bottom end of the second groove.

[0020] Optionally, the lifting target includes a roll.

[0021] The beneficial effects of the present application are as follows: a hoist is provided, comprising an outer beam, an inner beam, two openers and closeers respectively arranged at both ends of the inner beam, and two timing mechanisms respectively arranged at both ends of the inner beam, the inner beam can be vertically movably arranged inside the outer beam, the length direction of the inner beam and the outer beam are the same, the opener and closeer comprises a pressure plate, a hand joint and a manipulator connected in sequence, a pin shaft is passed through the pressure plate, and the manipulator is rotatably connected to the outer beam; when the inner beam moves up compared to the outer beam, the hand joint closes the manipulator, and when the inner beam moves down compared to the outer beam, the hand joint opens the manipulator, and the timing mechanism is pushed once by the rising lifting target, which unlocks the pin shaft, restores the locking The pin shaft changes between two locked states once; the sling is placed on the lifting target, the lifting target pushes the timing mechanism once to release the lock on the pin shaft, the overhead crane closes the manipulator by lifting the inner beam, and smoothly moves the sling and the lifting target to the preset position, and the overall downward movement is put on hold as the lifting target is put on hold. When the inner beam moves down compared to the outer beam, the manipulator opens until the lifting target pushes the timing mechanism once to restore the lock on the pin shaft. The sling maintains the manipulator open and moves to the next work point; this solution has the characteristics of automatic clamping and automatic release, eliminates the operating steps of removing and hanging the sling and has a self-locking function, which increases lifting efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention.

[0023] Figure 1 A schematic diagram of the overall structure of a sling provided in this application;

[0024] Figure 2 for Figure 1 The figure includes a schematic diagram of the structure of the mechanical claw in the open state;

[0025] Figure 3 for Figure 2 Schematic diagram of the structure shown with the mechanical claw in a closed state;

[0026] Figure 4 for Figure 3 Schematic diagram of the specific structure of the middle switch;

[0027] Figure 5 for Figure 4 A schematic diagram omitting some structures;

[0028] Figure 6 for Figure 1 Schematic diagram of the specific structure of the timing mechanism;

[0029] Figure 7 for Figure 6 Schematic diagram of the specific structure of the medium-strength magnetic turntable;

[0030] Figure 8 A first time sequence diagram showing the spreader provided in this application;

[0031] Figure 9 A second timing diagram showing the spreader provided in this application;

[0032] Figure 10 The third time sequence diagram of the spreader provided in this application;

[0033] Figure 11 The fourth time sequence diagram of the spreader provided in this application;

[0034] Figure 12 The fifth time sequence diagram of the spreader provided in this application;

[0035] Figure 13 The sixth timing diagram of the spreader provided in this application;

[0036] Figure 14 The seventh time sequence diagram of the spreader provided in this application;

[0037] Figure 15 The eighth time sequence diagram of the spreader provided in this application;

[0038] Figure 16 This is the ninth timing diagram of the sling provided in this application.

[0039] Figures marked: 10-spreader, 100-outer beam, 110-outer plate, 120-inner plate, 200-inner beam, 210-lifting hole, 220-pin, 300-opener, 310-pressing plate, 311-first slot, 312-second slot, 320-hand joint, 321-first joint plate, 321a-third slot, 322-second joint plate, 322a-fourth slot, 323-first axis, 324-second axis, 325-third axis, 326-fourth axis, 327-fifth axis, 330-manipulator, 331-first hand, 332- The second hand, 400-timing mechanism, 410-contact assembly, 411-guide seat, 412-tentacle, 412a-first guide groove, 413-elastic member, 414-paddle, 414a-first point, 414b-paddle head, 420-strong magnetic turntable, 430-hook, 431-hook plate, 431a-hook groove, 432-linking plate, 432a-second point, 432b-matching electrode, 432c-second guide groove, 440-linking rod, 440a-third guide groove, 442-mover, 500-guard plate, 20-lifting target. DETAILED DESCRIPTION

[0040] The embodiment of the present application solves the technical problems of inconvenience and low efficiency in lifting rollers by slings in the related art by providing a lifting device.

[0041] The technical solution in the embodiments of the present application is to solve the above technical problems, and the overall idea is as follows:

[0042] A hoist comprises an outer beam, an inner beam, two openers and closeers and two timing mechanisms. The inner beam is vertically movably arranged inside the outer beam. A lifting hole is provided on the top of the inner beam. Pins are respectively provided at both ends of the length of the inner beam. Two openers are respectively arranged at both ends of the length of the inner beam. The opener comprises a pressure plate, a hand joint and a manipulator connected in sequence. The pin is passed through the pressure plate. The manipulator is rotatably connected to the outer beam. The hand joint is used to close the manipulator when the inner beam moves up compared to the outer beam and to open the manipulator when the inner beam moves down compared to the outer beam. The two timing mechanisms are respectively arranged at both ends of the length of the inner beam. The timing mechanism changes from the two states of releasing the lock of the pin shaft and restoring the lock of the pin shaft once when it is pushed once by the rising lifting target.

[0043] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0044] Please refer to Figures 1 to 16This embodiment provides a sling 10 comprising an outer beam 100, an inner beam 200, two shutters 300, and two timing mechanisms 400. The inner beam 200 and the outer beam 100 have the same length. In terms of spatial arrangement, one end of the inner beam 200 and the outer beam 100 are substantially located in the same region, while the other end of the inner beam 200 and the outer beam 100 are located in another region. The inner beam 200 and the outer beam 100 are arranged parallel to each other. Furthermore, the two shutters 300 are provided at the respective ends of the inner beam 200, and the two timing mechanisms 400 are provided at the respective ends of the inner beam 200.

[0045] The inner beam 200 is vertically movable in the outer beam 100. Specifically, the outer beam 100 is provided with an inner channel with an upward opening. Figure 1 In the illustrated embodiment, the internal channel is configured as a vertically extending channel; the inner beam 200 can be moved upward and downward relative to the outer beam 100. It should also be noted that the inner beam 200 does not separate from the outer beam 100 when moving upward. A lifting hole 210 is provided at the top of the inner beam 200, and a crane is generally used to lift and move the inner beam 200 by acting on the lifting hole 210.

[0046] Please refer to Figures 1 to 3 , pins 220 are respectively provided at both ends of the length of the inner beam 200, and the opener 300 includes a pressure plate 310, a hand joint 320 and a manipulator 330 connected in sequence. The pin 220 is passed through the pressure plate 310, and the manipulator 330 is rotatably connected to the outer beam 100. The hand joint 320 is used to close the manipulator 330 when the inner beam 200 moves up compared with the outer beam 100, and to open the manipulator 330 when the inner beam 200 moves down compared with the outer beam 100. When the timing mechanism 400 is pushed once by the rising lifting target 20, it changes from the two states of releasing the lock of the pin shaft 220 and restoring the lock of the pin shaft 220.

[0047] The operation process that can be achieved by the above scheme is roughly as follows: the sling 10 is moved to the lifting target 20 by the overhead crane, specifically the outer beam 100 is placed on the lifting target, and the inner beam 200 continues to descend until the lifting target 20 pushes the timing mechanism 400 once, releasing the lock of the timing mechanism 400 on the pin 220. The overhead crane closes the manipulator 330 by lifting the inner beam 200, and smoothly moves the sling 10 and the lifting target 20 to the preset position and moves downward as a whole; moves down to the lifting target 20 and puts it on the shelf. When the inner beam 200 continues to move downward compared to the outer beam 100, the manipulator 330 automatically opens, and finally the lifting target 20 will push the timing mechanism 400 again, restoring the lock of the timing mechanism 400 on the pin 220. At this time, the manipulator 330 is maintained in the open state, and the sling 10 is moved to the next work point.

[0048] In summary, the sling 10 of this solution has the characteristics of automatic clamping and automatic loosening, eliminating the operation steps of removing and hanging the sling, and has a self-locking function, which increases the lifting efficiency, improves the convenience of the operation, and improves the personal safety of the operator.

[0049] The lifting target 20 in this embodiment is preferably a columnar object, including a roller. It should be noted that the weight of the roller should not be too heavy.

[0050] Optionally, please refer to Figures 1 to 5 The manipulator 330 includes a first hand 331 and a second hand 332. The pressure plates 310 located at one end of the inner beam 200 are arranged in pairs, with the two pressure plates 310 spaced apart. The hand joint 320 includes a first joint plate 321 and a second joint plate 322. The two joint plates are rotatably connected at their mid-lengths via a first shaft 323. The top of the first joint plate 321 is positioned between the two pressure plates 310, connected to the pressure plates 310 via a second shaft 324, and connected to the first hand 331 via a third shaft 325. The top of the second joint plate 322 is positioned between the two pressure plates 310, connected to the pressure plates 310 via a fourth shaft 326, and connected to the second hand 332 via a fifth shaft 327. The pressure plate 310 is provided with a first groove 311 for the second shaft 324 to pass through and a second groove 312 for the fourth shaft 326 to pass through. The first joint plate 321 is provided with a third groove 321a for the third shaft 325 to pass through. The second joint plate 322 is provided with a fourth groove 322a for the fifth shaft 327 to pass through. The first groove 311 and the second groove 312 are symmetrically arranged. The distance between the top end of the first groove 311 and the top end of the second groove 312 is smaller than the distance between the bottom end of the first groove 311 and the bottom end of the second groove 312.

[0051] When the overhead crane drives the inner beam 200 to move upward compared to the outer beam 100, the pin 220 at the end of the inner beam 200 moves upward, which drives the pressure plate 310 to move upward; Figure 4 As shown, the first slot 311 and the second slot 312 are both inclined along the height direction. The upward movement of the pressure plate 310 causes the second shaft 324 to move relative to the first slot 311 and the fourth shaft 326 to move relative to the second slot 312. Under this connection, the first hand 331 and the second hand 332 ultimately adjust from an open state to a closed state. When the inner beam 200 falls relative to the outer beam 100, the movement is reversed. Provided that other limiting conditions are met, the first hand 331 and the second hand 332 ultimately adjust from a closed state to an open state.

[0052] Optionally, please refer to Figures 1 to 4The outer beam 100 is provided with double-layer panels at both ends of its length. These panels include an outer panel 110 located on the outside and an inner panel 120 located near the center of the outer beam 100. The outer panel 110 and the inner panel 120 are spaced apart and arranged parallel to each other. The pressure plate 310 and the hand joint 320 are both located in the space between the outer panel 110 and the inner panel 120. The timing mechanism 400 is mounted on the side of the outer panel 110 away from the inner panel 120. The double-layer panels separate the shutter 300 and the timing mechanism 400, providing them with relatively independent installation spaces. This also creates a compact spatial arrangement and accommodates the installation of multiple axes in the shutter 300.

[0053] Optionally, the sling 10 is provided with guard plates 500 at both ends of the length of the outer beam 100. The guard plates 500 are arranged parallel to the outer plate 110 at intervals. The timing mechanism 400 is installed between the guard plates 500 and the outer plate 110. The guard plates 500 reduce the space where the timing mechanism 400 is located and the exposed area to the outside world, thereby playing a protective role.

[0054] Alternatively, see Figure 6 The timing mechanism 400 includes a contact assembly 410 , a strong magnetic turntable 420 , a hook 430 and a linkage rod 440 .

[0055] Please refer to Figure 6 、 Figures 8 to 16 The contact assembly 410 includes a guide seat 411, a tentacle 412, an elastic member 413 and a paddle 414. The guide seat 411 is fixedly connected to the outer panel 110. The guide seat 411 is located in a first guide groove 412a inside the tentacle 412. The tentacle 412 can move vertically and the lower edge of the tentacle 412 can move to below the lower edge of the outer panel 110. The two ends of the elastic member 413 are respectively connected to the top of the contact 412 and the paddle 414. The paddle 414 and the tentacle 412 are rotatably connected at a first point 414a. The paddle 414 is located on the side of the tentacle 412 away from the outer panel 110.

[0056] The strong magnetic turntable 420 is rotatably mounted on the outer plate 110. Figure 7 As shown, the strong magnetic turntable 420 includes multiple magnets arranged in sequence along the circumference. The two magnetic poles of the magnets are respectively arranged toward the center of the disk and the outside of the disk. The magnetic poles are arranged in a circular pattern of N pole and S pole along the circumference of the strong magnetic turntable 420. When the target 20 is lifted and the tentacles 412 are pushed once, the paddle 414 will move the strong magnetic turntable 420 once. Figures 8 to 16 When the tentacle 412 automatically falls under gravity, the paddle 414 does not move the strong magnetic turntable 420. The paddle 414 only moves the strong magnetic turntable 420 once when the tentacle 412 is hit or pushed by the lifting target 20 such as a roller, and processes the position directly above the strong magnetic turntable 420. When it is moved once, the position changes from the N pole to the S pole, and when it is moved again, the position changes from the S pole to the N pole, and the cycle continues.

[0057] The hook 430 includes a hook plate 431 and a linkage plate 432 connected to the hook plate 431. The hook plate 431 is provided with a hook groove 431a on the side opposite to the linkage plate 432. The end of the linkage plate 432 close to the hook plate 431 is rotatably connected to the outer plate 110 at a second point 432a. When the hook groove 431a is located directly above the pin shaft 220, the hook 430 locks the pin shaft 220. When the hook groove 431a deviates from the pin shaft 220, the hook 430 is separated from the pin shaft 220. A matching electrode 432b is installed on the side of the linkage plate 432 facing the strong magnetic turntable 420. The matching electrode 432b is used to attract or repel the strong magnetic turntable 420. The linkage plate 432 is provided with a second guide groove 432c. Each time the lifting target 20 pushes the tentacle 412, the matching electrode 432b and the strong magnetic turntable 420 adjust between attraction and repulsion, and finally the hook 430 can change its position and adjust between locking the pin shaft 220 and separating from the pin shaft 220.

[0058] The top end of the connecting rod 440 is rotatably connected to the pin shaft 220. The connecting rod 440 is provided with a third guide groove 440a. The connecting rod 440 is installed with a mover 442. The mover 442 is movably installed in the second guide groove 432c and the third guide groove 440a. Through this follow-up design, on the one hand, it is ensured that the inner beam 200 is pulled out from the outer beam 100.

[0059] Optionally, the strong magnetic turntable 420 has rotational resistance when it rotates compared to the outer plate 110, and the rotational resistance is greater than the repulsive force when the matching electrode 432b and the strong magnetic turntable 420 repel each other, so as to ensure that the hook 430 has a rotational movement tendency when they repel each other, rather than the strong magnetic turntable 420 being rotated and unable to achieve the above functions; the rotational resistance is less than the paddle 414's paddle force on the strong magnetic turntable 420, so that the paddle 414 can smoothly paddle the strong magnetic turntable 420.

[0060] Alternatively, see Figure 6 The paddle 414 includes a head 414b, which is closer to the strong magnetic turntable 420 than the first point 414a. The connection point between the elastic member 413 and the paddle 414 is located on the side of the first point 414a away from the paddle 414. The paddle head 414b has an upper edge and a lower edge. The upper edge of the paddle head 414b is flat, while the lower edge of the paddle head 414b is curved. The flat and curved surfaces intersect at a point that is distal to the first point 414a. This further ensures that the strong magnetic turntable 420 will not be moved when the tentacle 412 moves downward relative to the pressure plate 310, but can be moved when the tentacle 412 moves upward relative to the pressure plate 310.

[0061] Alternatively, see Figure 6 In the width direction of the outer beam 100 , the lower edge size of the tentacle 412 is larger than the upper edge size of the tentacle 412 , so that the contact area between the tentacle 412 and the lifting target 20 such as a roller is larger.

[0062] The elastic member 413 may be made of rubber or other elastic materials and may be in the form of a spring.

[0063] To further explain the working process of the sling 10 in detail, the target 20 to be lifted is a roller, for example, please refer to Figures 1 to 16 , please refer to Figures 8 to 16 , Figure 8 The robot arm 330 is shown descending to allow the roller to contact the tentacle 412; Figure 9 After the strong magnetic turntable 420 rotates, it repels the matching electrode 432b on the hook 430, generating thrust; Figure 10 It is shown that the hook 430 is lifted to a certain angle under the action of the repulsive force; Figure 11 The inner beam 200 rises and the pin 220 lifts the pressure plate 310 of the shutter 300, causing the pressure plate 310 to move upward and the manipulator 330 to adjust to the closed state. Figure 12 When the roller is lifted, it moves to the bottom of the manipulator 330. The tentacle 412 is affected by gravity and moves downward relative to the pressure plate 310. The elastic member 413 is stretched, and the strong magnetic turntable 420 is not moved. Figure 13 It shows that after the roll is hoisted to the target roll stand, the hoist 10 continues to move downward until the roll touches the tentacle 412 again; Figure 14 The display tentacle 412 is pushed, and the strong magnetic turntable 420 is moved until the repulsion with the matching electrode 432b is adjusted to attraction. However, at this time, the hook 430 is blocked by the pin 220 and cannot return to its original position. As the overhead crane lowers the hook to allow the inner beam 200 to fall, the pins 220 on both sides press down the pressure plate 310 of the shutter 300, allowing the manipulator 330 to open. Figure 15 It shows that the hook 430 returns to its initial position under the mutual attraction between the strong magnetic turntable 420 and the matching electrode 432b; Figure 16 The display spreader 10 leaves the roller, and the tentacles 412 move downward relative to the pressing plate 310 under the action of gravity, moving to the next roller or entering a ready state.

[0064] It can be seen that Figure 8 and Figure 16 In summary, the sling 10 of this embodiment can realize the time sequence self-locking function.

[0065] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0066] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A sling, characterized in that: The spreader comprises: external beams; An inner beam is vertically movably arranged inside the outer beam, a hanging hole is opened on the top of the inner beam, and pins are respectively provided at both ends of the inner beam; Two shutters are respectively provided at both ends of the length of the inner beam, the shutters comprising a pressure plate, a hand joint and a manipulator connected in sequence, the pin is passed through the pressure plate, the manipulator is rotatably connected to the outer beam, and the hand joint is used to close the manipulator when the inner beam moves upward relative to the outer beam, and to open the manipulator when the inner beam moves downward relative to the outer beam; and Two timing mechanisms are respectively provided at both ends of the inner beam, and each of the timing mechanisms changes from one state of releasing the locking of the pin shaft to another state of restoring the locking of the pin shaft when pushed once by the ascending lifting object; Double-layer plates are provided at both ends of the length of the outer beam, including an outer plate located on the outside and an inner plate near the center of the outer beam. The outer plate and the inner plate are arranged in parallel with each other. The pressure plate and the hand joint are both arranged in the interval area between the outer plate and the inner plate. The timing mechanism is installed on the side of the outer plate away from the inner plate. The timing mechanism includes a contact assembly, a strong magnetic turntable, a hook and a connecting rod; The contact assembly includes a guide seat, a tentacle, an elastic member, and a paddle. The guide seat is fixedly connected to the outer plate. A first guide groove is provided in the tentacle. The guide seat is located in the first guide groove. The tentacle can move vertically and the lower edge of the tentacle can move to be lower than the lower edge of the outer plate. The two ends of the elastic member are respectively connected to the top of the tentacle and the paddle. The paddle and the tentacle are rotatably connected at a first point. The paddle is located on the side of the tentacle away from the outer plate. The strong magnetic turntable is rotatably mounted on the outer plate, and includes a plurality of magnets arranged in sequence along the circumferential direction, with the two magnetic poles of the magnets facing the center of the disk and the outer side of the disk respectively. The magnetic poles are arranged cyclically along the circumference of the strong magnetic turntable as N poles and S poles. When the lifting target pushes the tentacle once, the paddle will poke the strong magnetic turntable once. The hook includes a hook plate and a linkage plate connected to the hook plate, the hook plate is provided with a hook groove on a side opposite to the linkage plate, one end of the linkage plate close to the hook plate is rotatably connected to the outer plate at a second point, the hook locks the pin when the hook groove is directly above the pin, and the hook is separated from the pin when the hook groove deviates from the pin, a mating electrode is installed on the side of the linkage plate facing the strong magnetic turntable, the mating electrode is used to attract or repel the strong magnetic turntable, and the linkage plate is provided with a second guide groove; The top end of the connecting rod is rotatably connected to the pin shaft, the connecting rod is provided with a third guide groove, the connecting rod is installed with a mover, and the mover is movably installed in the second guide groove and the third guide groove.

2. The sling according to claim 1, wherein: The strong magnetic turntable has rotation resistance when rotating compared to the outer plate. The rotation resistance is greater than the repulsive force between the matching electrode and the strong magnetic turntable, and the rotation resistance is less than the paddle force on the strong magnetic turntable.

3. The sling according to claim 1, wherein: The pick includes a pick head, the pick head is closer to the strong magnetic turntable than the first point, and the connection point between the elastic member and the pick is located on a side of the first point away from the pick; The dial head has an upper edge and a lower edge, the upper edge of the dial head is arranged in a plane, the lower edge of the dial head is arranged in an arc surface, the plane and the arc surface intersect at a point and the point is far away from the first point.

4. The sling according to claim 1, wherein: In the width direction of the outer beam, the size of the lower edge of the tentacle is larger than the size of the upper edge of the tentacle.

5. The spreader according to claim 1, wherein: The elastic member is made of rubber.

6. The sling according to claim 1, wherein: The hoist is provided with guard plates at both ends of the length of the outer beam, respectively. The guard plates are arranged in parallel with the outer plates at intervals, and the timing mechanism is installed between the guard plates and the outer plates.

7. The spreader according to claim 1, wherein: The manipulator includes a first hand and a second hand, and the pressing plates located at one end of the inner beam are arranged in pairs, and the two pressing plates are arranged at intervals; The hand joint includes a first joint plate and a second joint plate, the middle portions of the two joint plates are rotatably connected by a first axis, the top end of the first joint plate is placed between the two pressing plates, the top end is connected to the pressing plates by a second axis, and the bottom end is connected to the first hand by a third axis, the top end of the second joint plate is placed between the two pressing plates, the top end is connected to the pressing plates by a fourth axis, and the bottom end is connected to the second hand by a fifth axis; The pressure plate is provided with a first groove for the second axis to pass through and a second groove for the fourth axis to pass through, the first joint plate is provided with a third groove for the third axis to pass through, and the second joint plate is provided with a fourth groove for the fifth axis to pass through, the first groove and the second groove are symmetrically arranged, and the distance between the top end of the first groove and the top end of the second groove is smaller than the distance between the bottom end of the first groove and the bottom end of the second groove.

8. The spreader according to claim 1, wherein: The lifting target includes a rolling mill roll.

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