A steel bar coil lifting tool

Abstract

The present invention provides a steel bar coiled sling, which relates to the technical field of steel bar slings and includes: a cross beam, a sleeve and an unlocking component. Among them, a lifting lug is fixedly arranged on the cross beam, and at least two opposite columns are movably connected along the length direction of the cross beam. The number of the sleeves corresponds to that of the columns one by one, and the sleeves are fixedly arranged on the respective columns. One end of each of the two sleeves is open. A connecting column is fixedly arranged in one of the sleeves, and ratchet teeth are fixedly arranged on the outer wall of the connecting column. A ratchet pawl that can be clamped on the ratchet teeth is rotatably connected to the inner wall of the other sleeve; the unlocking component is connected to the ratchet pawl to drive it to disengage from the ratchet teeth. It solves the problems that the sling is not convenient and stable enough when clamping and lifting the steel bar coiled in the prior art.

Description

Technical Field

[0001] The present invention relates to the technical field of steel bar lifting tools, and in particular to a steel bar coil lifting tool. Background Art

[0002] During the production process of steel bar products, it is often necessary to lift steel bars. Although there are steel bar clamps of the jaw type in the prior art, they are mainly suitable for round steel and bar steel, and cannot lift and clamp steel bar coils. Especially for steel bar coils without a fixed spindle type support, in practice, they are mainly fixed by manual bundling. This operation is inefficient, and the bundling is prone to looseness, posing a safety hazard.

[0003] To solve the above problems, the publication number CN204778337 U proposes a long-arm type steel bar coil lifting tool. One end of it is provided with an opening and forks the steel bar coil through a cantilever, and uses a limit post to limit the steel bar coil. On the one hand, due to its cantilever structure, the load-bearing capacity of the lifting tool is poor; on the other hand, the opening of the lifting tool is not closed and is simply limited by the limit post. During the movement of the steel bar coil, it is easy to slide out of the cantilever due to left and right shaking, posing a safety hazard; that is to say, the lifting tools in the prior art are not convenient and stable enough when clamping and lifting steel bar coils. Summary of the Invention

[0004] Aiming at the deficiencies in the prior art, the purpose of the present invention is to provide a steel bar coil lifting tool, which solves the problem that the lifting tool in the prior art is not convenient and stable enough when clamping and lifting steel bar coils.

[0005] According to an embodiment of the present invention, a steel bar coil lifting tool includes: a cross beam, a sleeve, and an unlocking assembly, wherein,

[0006] A lifting ear is fixedly provided on the cross beam, and at least two opposite columns are movably connected along the length direction of the cross beam.

[0007] The number of the sleeves corresponds to that of the columns one by one and is fixedly provided on each of the columns. One end of each of the two sleeves is open. A connecting column is fixedly provided in one of the sleeves, and ratchet teeth are fixedly provided on the outer wall of the connecting column. A ratchet pawl that can be engaged with the ratchet teeth is rotatably connected to the inner wall of the other sleeve.

[0008] The unlocking assembly is connected to the ratchet pawl to drive it to disengage from the ratchet teeth.

[0009] Compared with the prior art, the present invention has the following beneficial effects: The operator laterally slides two columns so that the two sleeves move towards each other until the connecting column on one sleeve is inserted into the other sleeve. The ratchet teeth on the connecting column cooperate with the ratchet pawl, and the two sleeves can be unidirectionally locked to prevent the two sleeves from separating from each other. With the above solution, on the one hand, the cross beam, columns and sleeves form a closed rectangular frame, preventing the steel bar coil from swaying left and right and slipping off the sleeve, and the ratchet pawl and ratchet teeth are unidirectionally locked stably. On the other hand, the above structure is a non-cantilever structure, enhancing the load-bearing capacity of the lifting tool. In addition, only by laterally moving the columns, the two sleeves can be inserted into the inner circle of the steel bar coil, and by operating the unlocking component, the two sleeves can be quickly unlocked as required. It can be seen that the lifting tool can firmly and conveniently clamp and lift the steel bar coil. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 is a schematic structural diagram of an embodiment of the present invention;

[0011] Figure 2 is Figure 1 a partial enlarged view of A in;

[0012] Figure 3 is a schematic structural diagram of another unlocking component in an embodiment of the present invention.

[0013] In the above drawings: 1, cross beam; 2, sleeve; 3, lifting lug; 4, column; 5, connecting column; 501, channel; 6, ratchet teeth; 7, ratchet pawl; 8, push rod; 801, lower wedge surface; 9, elastic sheet; 10, top column; 11, support rod; 111, upper wedge surface; 12, spring; 13, roller; 14, adjusting rod; 15, hand wheel. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0014] The technical solutions in the present invention will be further described below with reference to the drawings and embodiments.

[0015] The present invention proposes an embodiment, as Figure 1 and Figure 2 shown, a steel bar coil lifting tool, including: a cross beam 1, a sleeve 2 and an unlocking component, wherein,

[0016] A lifting lug 3 is fixedly provided on the top end or side wall of the cross beam 1, and the lifting lug 3 is used for a lifting device to lift the present lifting tool. Its specific position and quantity depend on actual needs to ensure stable lifting of the present lifting tool; At least two opposite columns 4 are movably connected along the length direction of the cross beam 1. In this embodiment, two columns 4 are taken as an example. In order to facilitate pushing the columns 4, a handle (not shown in the figure) can be provided on the columns 4;

[0017] The sleeve 2 is also provided with two, and they are fixedly arranged on each column 4. It is optimal that the two sleeves 2 are perpendicular to the inner wall surface of the column 4, so that the sleeve 2 has sufficient support strength. Of course, reinforcing ribs (not shown in the figure) can also be provided to connect the sleeve 2 and the column 4 to further strengthen the support strength of the sleeve 2; in addition, in this embodiment, the sleeve 2 is made of rectangular steel. On the one hand, the material is convenient to obtain and it has a built-in cavity. On the other hand, at least two points of the outer wall surface of the rectangular steel support the inner wall of the steel bar coil, and the effect is better; both ends of the two sleeves 2 facing each other are open. Among them, a connecting column 5 is arranged in the right sleeve 2. The connecting column 5 is welded to the inner wall of the right sleeve 2. One end of the connecting column 5 passes through the right sleeve 2, and a ratchet 6 is fixedly arranged on the outer wall of the connecting column 5. The tip of the tooth of the ratchet 6 extends towards the right sleeve 2. The ratchet 6 is fixedly arranged on the upper and / or lower side of the connecting column 5. A ratchet pawl 7 that can be clamped on the ratchet 6 is rotatably connected to the inner wall of the left sleeve 2 through a rotating shaft. In practice, a torsion spring can be sleeved on the rotating shaft, and both ends of the torsion spring are respectively connected to the ratchet pawl 7 and the left sleeve 2. The torsion spring enables the ratchet pawl 7 to keep abutting against the ratchet 6 when the external force is removed;

[0018] The unlocking assembly is connected to the ratchet pawl 7 to drive it to disengage from the ratchet 6, thereby completing the unlocking.

[0019] The operator laterally slides the two columns 4 so that the two sleeves 2 move towards each other until the connecting column 5 on the right sleeve 2 is inserted into the left sleeve 2. The inclined surface of the ratchet 6 on the connecting column 5 first pushes the ratchet pawl 7 to swing away from the ratchet 6, and then the ratchet 6 is clamped with the ratchet 6 under the drive of the torsion spring. By cooperating with each other, the two sleeves 2 can be locked unidirectionally to prevent the two sleeves 2 from separating from each other; adopting the above scheme, on the one hand, the cross beam 1, the columns 4 and the two sleeves 2 enclose a closed rectangular frame, preventing the steel bar coil from shaking left and right and slipping off the sleeve 2, and the ratchet pawl 7 and the ratchet 6 are locked unidirectionally and stably; on the other hand, the above structure is a non-cantilever structure, enhancing the load-bearing capacity of the lifting tool; in addition, only by laterally moving the column 4, the two sleeves 2 can be inserted into the inner circle of the steel bar coil, and by operating the unlocking assembly, the two sleeves 2 can be quickly unlocked as required; it can be seen that the lifting tool can firmly and conveniently clamp and lift the steel bar coil.

[0020] In another embodiment proposed by the present invention, the main difference from the above embodiment is that a specific implementation manner of the unlocking assembly is proposed. Specifically, as Figure 1 and Figure 2 shown, the connecting column 5 is in a shell shape and is provided with a vertically penetrating channel 501 thereon. The connecting column 5 can be directly made of rectangular steel;

[0021] The unlocking assembly includes a push rod 8 and an elastic sheet 9. The push rod 8 is movably connected to the column 4 on the right side of the crossbeam 1 along the length direction thereof. One end of the elastic sheet 9 is fixedly connected to the left end of the push rod 8. A top column 10 is fixedly provided on the other end of the elastic sheet 9. The end of the elastic sheet 9 that is away from the push rod 8 extends to the left and upward, and the elastic sheet 9 itself is made of elastic material.

[0022] Taking the upper pawl 7 as an example, the operator first pushes the right sleeve 2 to move a short distance to the left, leaving space for the pawl 7 to swing upward, and then operates the push rod 8 to push the elastic sheet 9 and the top column 10 to move to the left. When the top column 10 slides along the inner wall of the connecting column 5 to the above-mentioned channel 501, the elastic sheet 9 drives the top column 10 to pass through the channel 501 under the action of elastic force, and lifts the free end of the pawl 7 upward to make it swing clockwise until the pawl 7 is out of contact with the ratchet 6, completing the unlocking; it should be understood that the height of the top column 10 passing through the channel 501 should be properly set according to actual needs, so that the pawl 7 can swing counterclockwise and be out of contact with the ratchet 6. In addition, the channel 501 should be set on the right side of the ratchet 6.

[0023] Further, such as Figure 1 As shown, the right column 4 is provided with an internal thread, and the push rod 8 is provided with an external thread and is threadedly connected to the column 4. In this way, the operator can drive the push rod 8 to move left or right by screwing in the push rod 8, and the self-locking property of the thread can be used to lock the position of the push rod 8, thereby maintaining the relative position of the top column 10 and the connecting column 5 to avoid mis-locking.

[0024] Furthermore, in order to facilitate the screwing in of the push rod 8 , a hand wheel 15 is fixedly provided at one end of the push rod 8 away from the elastic sheet 9 .

[0025] Furthermore, the left sleeve 2 is respectively connected to the two above-mentioned pawls 7 by means of pin shafts and are symmetrically distributed up and down. The above-mentioned ratchet teeth 6 are fixedly provided on the upper and lower sides of the connecting rod. The elastic sheet 9 is in a "V" shape and the above-mentioned top columns 10 are respectively fixedly provided at both ends. The closed end of the elastic sheet 9 is fixedly connected to one end of the push rod 8. The pawls 7 and ratchet teeth 6 symmetrically arranged up and down make the locking of the sling tighter. In addition, the top columns 10 symmetrically arranged up and down can always rest against the upper and lower inner walls of the connecting column 5, so as to accumulate elastic potential energy, so that each pawl 7 will be bounced up when each top column 10 moves to the corresponding channel 501.

[0026] Furthermore, each top post 10 is spherical and is embedded at one end of the elastic sheet 9. The above-mentioned embedding is an existing technology, which should meet the requirement that the top post 10 can rotate. In this way, on the one hand, during the movement of each top post 10, it makes rolling contact with the inner wall of the connecting post 5, reducing friction. On the other hand, each top post 10 can make rolling contact with the bottom edge of the channel 501, facilitating the pulling out of each top post 10 from the channel 501 when the push rod 8 moves to the right. In practice, the bottom edge of the channel 501 can also be set as an inclined angle (not shown in the figure) for guiding. In addition, during the process that the top post 10 lifts the pawl 7 and the connecting post 5 moves a short distance to the left when unlocking, the top post 10 makes rolling contact with the pawl 7, reducing friction.

[0027] Furthermore, as Figure 1 and Figure 2 shown, it further includes a spring 12. The two ends of the spring 12 are respectively fixed on the opposite inner side walls of the elastic sheet 9, which can further enhance the elastic force of the two elastic sheets 9, ensuring that the two support rods 11 can always abut against the inner wall of the connecting post 5, and can pass through the channel 501 more smoothly when sliding to the channel 501, and bounce up the pawl 7.

[0028] In another embodiment proposed by the present invention, the main difference from the above-mentioned embodiment lies in providing another specific implementation manner of the unlocking component. As Figure 3 shown, the connecting post 5 is still in a shell shape and is provided with a vertically penetrating channel 501. The unlocking component includes a support rod 11 and a push rod 8. The support rod 11 is vertically elastically connected in the connecting post 5 through a conventional elastic element. One end of the support rod 11 close to the push rod 8 is provided with an upper wedge surface 111; the push rod 8 is movably connected to the right column 4 along the length direction of the cross beam 1. One end of the push rod 8 is provided with a lower wedge surface 801 that matches the upper wedge surface 111. The push rod 8 can make the support rod 11 pass through the channel 501 and lift the pawl 7; similarly, the operator first pushes the right sleeve 2 to move a short distance to the left, leaving a space for the pawl 7 to swing upward. At this time, then drives the push rod 8 to move horizontally to the left, so that the lower wedge surface 801 and the upper wedge surface 111 slide relative to each other to drive the support rod 11 to lift the pawl 7. When the free end of the pawl 7 swings upward or downward to be higher than the tip of the ratchet tooth 6, the unlocking of the pawl 7 and the ratchet tooth 6 is completed; it should be understood that the horizontal distance between the above-mentioned channel 501 and the ratchet should be set appropriately to ensure that when the support rod 11 passes through the channel 501, the pawl 7 will not get stuck between the ratchet tooth 6 and the support rod 11. The distance between the above-mentioned top post 10 and the channel 501 should also be designed accordingly.

[0029] In another embodiment proposed by the present invention, as Figure 1 shown, a roller 13 is rotatably connected to the bottom of each column 4. The roller 13 can be a conventional universal wheel to facilitate moving this lifting tool to the steel frame coil to be clamped.

[0030] Further, it further includes a plurality of adjusting rods 14. Each adjusting rod 14 is provided with an external thread and is respectively threadedly connected to the bottom of each upright column 4. The bottom ends of the adjusting rods 14 are respectively connected to the rollers 13. By screwing the adjusting rods 14 downward, the lifting device can be raised. Conversely, the same principle applies, so as to adjust the distance between the sleeve 2 and the ground, thereby facilitating the insertion of the sleeve 2 into steel bar coils with different diameters and improving the versatility of the lifting device.

[0031] The working process of this lifting device is as follows:

[0032] First, push and pull the lifting device to the steel frame coil to be clamped, and then push the two sleeves 2 towards each other. During this process, the ratchet teeth 6 move to the left and push up the ratchet pawl 7. Subsequently, the ratchet pawl 7 is snapped onto the ratchet teeth 6 under the elastic force of the torsion spring. When the opposite ends of the two sleeves 2 come into contact, the ratchet teeth 6 and the ratchet pawl 7 are exactly locked at this time, and the lifting device and the steel bar coil can be lifted by a conventional lifting device. When lifted to the required position, the operator first pushes the right sleeve 2 to move a short distance to the left to leave a space for the ratchet pawl 7 to swing upward. At this time, rotate the handwheel 15 to screw the push rod 8 into the left. The push rod 8 drives the elastic piece 9 to slide horizontally to the left. When the ejector post 10 on the elastic piece 9 passes through the channel 501 and springs up the ratchet pawl 7, the unlocking operation of the two sleeves 2 is completed at this time. Move the two sleeves 2 horizontally in the opposite direction until they are pushed out of the steel bar coil; in addition, by rotating the adjusting rod 14 upward or downward, the height of the sleeve 2 can also be adjusted to adapt to steel bar coils with different diameters.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit. 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 steel bar coil lifting tool, characterized in that, include: A crossbeam (1), a sleeve (2) and an unlocking assembly, wherein: The cross beam (1) is fixedly provided with a lifting lug (3), and the cross beam (1) is movably connected to at least two opposite upright posts (4) along its length direction. The number of the sleeves (2) corresponds to the number of the pillars (4) and the sleeves (2) are fixed on each pillar (4); the opposite ends of the two sleeves (2) are open; a connecting pillar (5) is fixedly provided in one of the sleeves (2), and a ratchet (6) is fixedly provided on the outer wall of the connecting pillar (5); a ratchet (7) which can be rotatably connected to the inner wall of the other sleeve (2) and can be clamped on the ratchet (6); The unlocking assembly is connected to the pawl (7) to drive it to disengage from the ratchet (6); The connecting column (5) is in the shape of a shell and is provided with a vertically penetrating channel (501). The unlocking assembly comprises a push rod (8) and an elastic sheet (9). The push rod (8) is movably connected to one of the upright posts (4) along the length direction of the crossbeam (1); One end of the elastic sheet (9) is fixedly connected to one end of the push rod (8), and a top column (10) is fixedly arranged on the other end of the elastic sheet (9). The elastic sheet (9) is elastic and is used to enable the top column (10) to pass through the channel (501) and lift up the pawl (7); The top column (10) is in the shape of a bead and is rotatably embedded on one end of the elastic sheet (9); Two ratchet claws (7) are rotatably connected in the same sleeve (2) and are symmetrically distributed in the upper and lower parts. The ratchet teeth (6) are fixedly provided on the upper and lower sides of the same connecting column (5). The elastic sheet (9) is in a "V" shape and the top columns (10) are fixedly provided at both ends. The closed end of the elastic sheet (9) is fixedly connected to one end of the push rod (8).

2. The steel bar coiled sling according to claim 1, characterized in that, One of the columns (4) is provided with an internal thread, and the push rod (8) is provided with an external thread and is threadedly connected to the column (4).

3. The steel bar coil lifting tool according to claim 1, characterized in that, It also includes a spring (12), the two ends of which are respectively fixed on the two opposite inner side walls of the elastic sheet (9).

4. A steel bar coil lifting tool according to claim 1, characterized in that, The bottom of each of the upright posts (4) is rotatably connected to a roller (13).

5. The steel bar coil lifting tool according to claim 4, characterized in that, It also comprises a plurality of adjusting rods (14), each of the adjusting rods (14) being provided with an external thread and being respectively threadedly connected to the bottom of each of the uprights (4), and the bottom end of each of the adjusting rods (14) being respectively connected to each of the rollers (13).

6. The steel bar coil lifting tool according to claim 2, characterized in that, A hand wheel (15) is fixedly provided at one end of the push rod (8) away from the elastic sheet (9).

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