Hook positioning frame

Abstract

When stacked steel plates are lifted by a crane, there is a risk that the hook may lose its position when the steel plate is placed on the arm of the hook, causing the steel plate to fall off the arm. [Solution] The present invention is a lifting hook device that is equipped with a positioning member for positioning the hook and a regulating member that is attached to the positioning member and regulates the posture of the hook, and when lifting the steel plate being transported, the tip of the hook arm is inserted into the underside of the lifting part of the steel plate, and then the hook is held in a predetermined posture by the regulating member.

Description

[Technical Field]

[0001] The present invention relates to a positioning frame that positions the lifting hooks when stacked steel plate materials or the like are transported using a crane, and aims to prevent the weight balance of the plate materials from being disrupted due to the hooks being attached to the plate materials in an inconsistent position. [Background technology]

[0002] Conventionally, there have been many devices that use multiple hooks to hold the edges of steel plates to be transported without using lifting magnets. The problem here was that when trying to hold a steel plate with multiple hooks, the hooks would be attached in an uneven position, which would disrupt the weight balance of the steel plate, causing it to tilt significantly or, in some cases, fall off the hooks, potentially causing a major accident. In particular, if the worker is inexperienced, there is a risk that the attachment position of the hook to the steel plate may vary, which is dangerous.

[0003] [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 2021-191706 DISCLOSURE OF THE INVENTION [Problem to be solved by the invention]

[0005] The above-mentioned Patent Document 1 discloses a technique in which a positioning pipe is installed between a pair of hooks that lift steel material, and the distance between the hooks is maintained. However, the positioning pipe can be positioned in one direction but cannot be positioned in multiple directions. Furthermore, since the positioning pipe is not detachable from the hook, a different positioning pipe must be attached to the hook every time the size of the steel plate is changed, which requires time for setup and reduces the work efficiency. The present invention was made in consideration of the drawbacks of the prior art, and it is possible to position all hooks simultaneously, and by preparing multiple types of hook positioning frames, it is possible to immediately accommodate multiple types of steel materials. [Means for solving the problem]

[0006] (1) The present invention is a hook positioning frame for a device for lifting a transported object such as stacked steel plates, in which the tip of each arm of a plurality of hooks having a hook-like shape with a straight portion and a bent arm is inserted into the lifting portion of the steel plate to hold the steel plate and lift or suspend it, characterized in that a first positioning member extending in a direction parallel to one pair of parallel sides of the steel plate and a second positioning member extending in a direction parallel to the other pair of parallel sides of the steel plate are fixed to each other, and the hooks are detachably attached to both ends of the first positioning member. In the present invention, the first positioning member and the second positioning member form a fixed positioning frame. Therefore, when the hooks are engaged with both ends of the first positioning member and the steel plate is held at the same time, the holding position of the steel plate is automatically determined, and even an inexperienced worker can insert the hooks into the predetermined position, making the system foolproof. Furthermore, by preparing a plurality of types of hook positioning frames in advance, it is possible to immediately handle steel materials of a plurality of shapes, which allows for quick setup and improves work efficiency. (2) It is desirable that when the steel plate is held by the hook, the hook is fixed to the first positioning member by the weight of the steel plate itself. When the hook is configured to be fixed to the first positioning member by the weight of the steel plate, a separate device for fixing the steel plate to the hook is not required, resulting in a simple structure and improved work efficiency. (3) The steel plate may be rectangular, the first positioning member may extend in a direction parallel to a short side of the steel plate, and the second positioning member may extend in a direction parallel to a long side of the steel plate. When the first positioning member extends in a direction parallel to the short side of the steel plate and the second positioning member extends in a direction parallel to the long side of the steel plate, the shape of the frame becomes roughly similar to the steel plate, and the steel plate can be held more stably. (4) It is desirable that at least three first positioning members are provided and at least two second positioning members are provided. If at least three first positioning members extending in a direction parallel to the short sides are provided, the steel plate can be held even more stably. (5) It is desirable that the hook is fixed by a rod-shaped regulating member provided at both ends of the first positioning material, and that the regulating member is inserted into a through hole inserted into the first positioning material, thereby maintaining the posture of the hook. The hook is fixed by rod-shaped regulating members provided at both ends of the first positioning material, and the regulating members are configured to maintain the posture of the hook by being inserted into a through hole inserted into the first positioning material, so that the hook can be easily fixed to the first positioning material and reliably positioned. (6) It is desirable that a hoisting balance beam extending in the extending direction of the second positioning member is provided above the first positioning member and the second positioning member, and that each of the hooks is suspended from the hoisting balance beam by a wire rope. When each hook is suspended from the lifting balance beam by a wire rope, the steel material can be stably lifted and moved. (7) It is desirable that each hook engage with the wire rope directly or through a shackle. Each hook may be engaged with the wire rope directly or via a shackle, and the type of hook may be selected taking into consideration the type of wire rope and the overall weight of the steel plate. [Effects of the Invention]

[0015] The lifting hook device of the present invention is equipped with a positioning member for positioning the hook and a regulating member attached to the positioning member for regulating the posture of the hook, so that the posture of the hook is firmly maintained at all times, eliminating the risk of the transported object coming off the hook and falling. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is an external perspective view showing a hook, a positioning member, and a regulating member according to an embodiment of the present invention; [Figure 2] 1 is a side view (view A in FIG. 1) of the state before the arm of the hook is inserted into the lower part of the steel material according to the embodiment of the present invention. [Figure 3] FIG. 2 is a side view corresponding to FIG. 1 (view A in FIG. 1). [Figure 4] FIG. 2 is a front view corresponding to FIG. 1 (viewed from B in FIG. 1). [Figure 5] FIG. [Figure 6] FIG. 2 is an overall perspective view of the conveying device. [Figure 7] FIG. 10 is a front view of another embodiment of the present invention. [Figure 8] FIG. 10 is a side view of another embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0017] As one embodiment of the present invention, a lifting hook device for transporting an object made of five stacked steel plates 1 will be described. Each steel plate 1 transported here has a thickness of 12 mm, a length of 10 m in the longitudinal direction, and a length of approximately 2.5 m in the lateral direction. As shown in Figure 5, the hook 2 has a bifurcated shape with two straight sections 3 curved and joined, and the curved section 4 is bent slightly downward relative to the straight sections 3. The lower end of the straight section 3 is provided with an arm 5 bent at a slightly acute angle in the inclined direction, and the tip is cut sharply so that the upper surface is flat.

[0018] Next, the overall configuration of the state in which the steel plate 1 is transported will be described with reference to FIGS. A wire rope 7 is connected to the curved portion 4 of the hook 2 via a shackle 6, and the wire rope 7 is configured to be lifted by a crane, which will be described later.

[0019] In order to hold the hook 2 in a position where its two straight portions 3 extend vertically, i.e., in a position where the upper surface of the arm 5 holds the lower surface of the steel material 1, a first positioning beam (positioning member) 8 extending horizontally is inserted between the two straight portions 3. Near the end of the first positioning beam 8, a through-hole 9 is drilled, penetrating horizontally in a direction perpendicular to the extension direction of the first positioning beam 8, and a cylindrical regulating bar (regulating member) 10 is detachably inserted into the through-hole 9.

[0020] When the steel material 1 is held by the arm 5 of the hook 2 and an upward force is applied by the wire rope 7, a moment of force may be applied to the entire hook 2 in the clockwise direction with the curved part 4 of the hook 2 as the fulcrum, causing the entire hook 2 to rotate significantly in the clockwise direction with the curved part 4 as the fulcrum, and there is a risk that the steel material 1 may fall off the arm 5.

[0021] However, even if the entire hook 2 attempts to rotate clockwise with the curved portion 4 as the fulcrum, the straight portion 3 abuts against the restricting bar 10, preventing the entire hook 2 from rotating counterclockwise, and maintaining the straight portion 3 in a position where it extends vertically.

[0022] In addition, a screw hole 11 is threaded vertically slightly inside the end of the first positioning beam 8, penetrating the horizontal plane, and a clamping bolt (scissor means) 12 is screwed into the screw hole 11 and inserted through the first positioning beam 8. The lower end of the clamping bolt 12 is fixed so as to press the upper surface of the uppermost steel plate 1 of the stack from above when the steel plates 1 are transported.

[0023] The screw-in depth of the clamping bolt 12 is adjusted according to the thickness of the stacked steel plates 1 . A second positioning beam 13 is fixed to the upper part of the first positioning beam 8 inside the clamping bolt 12, and extends in the horizontal direction perpendicular to the positioning beam 8.

[0024] The steel plates 1 are transported as a unit in a stack of five sheets, and between each unit, a rectangular separator 14 (generally made of wood) extending in a direction parallel to the extension direction of the first positioning beam 8 is interposed to make it easier to insert the tip of the arm 5 of the hook 2.

[0025] Therefore, in order to transport the steel plate 1 unit by unit, first, as shown in Figure 2, the regulating bar (regulating member) 10 is removed from the through hole 9 of the first positioning beam 8, and the tip of the arm 5 of the hook 2 is inserted horizontally (in the direction of the arrow) into the underside of the topmost steel material 1 in the stack.

[0026] Next, as shown in Figure 3, after it is confirmed that the arm 5 is fully inserted under the uppermost steel material 1, the restriction bar 10 is inserted into the through hole 9. In this case, the restriction bar 10 is positioned at the rear of the straight portion 3 of the hook 3 as shown in Figure 3.

[0027] Therefore, when the hook 2 is pulled up in this state, as mentioned above, the entire hook 2 will attempt to rotate significantly clockwise with the curved portion 4 as the fulcrum. However, since the regulating bar 10 is located at the rear of the straight portion 3 of the hook 3, the rotation of the hook 2 is prevented by the regulating bar 10, and the arm 5 is held in a position inserted into the bottom of the steel plate 1, so there is no risk of the steel plate 1 coming off the arm 5.

[0028] Next, the overall structure of the conveying device including the hook 2 will be described mainly with reference to FIG. The upper end of an upper wire rope 20 is engaged with a crane hook 19 attached to a sheave 18 suspended by a crane wire 17 from the crane body (not shown).

[0029] In addition, below the sheave 18, a lifting balance beam 15 made of H-shaped steel extending horizontally is located, and three engaging pieces 16a, 16b are welded to the center and both ends of the upper and lower sides, respectively, and the lower ends of the upper wire ropes 20 are engaged with each of the upper engaging pieces 16a. The above structure is a well-known structure known as a hanging balance.

[0030] Two second positioning beams 13 are provided parallel to the upper part of the steel material 1 along the long side edge of the steel material 1, and three first positioning beams 8 are provided parallel to the short side of the steel material 1 below the second positioning beams 13, and the first positioning beams 8 and second positioning beams 13 are fixed in a grid pattern.

[0031] The upper ends of the wire ropes 7 are engaged with the engaging pieces 16b at the bottom of the lifting balance beam 15, and the lower ends of the wire ropes 7 are engaged with the shackles 6. As described above, when the steel material 1 is raised, the steel plate 1 is firmly held to the hook 2 by the arm 5 of the hook 2 and the regulating bar 10, and both ends of the first positioning beam 8 are also fixed by the hook 1 and the regulating bar 10, so the positional relationship between the hooks 1 is always fixed and the steel plate 1 is always transported stably.

[0032] Next, another embodiment will be described with reference to FIGS. The difference between this embodiment and the previous embodiment is that two support shafts 21 extending opposite each other are provided on the upper inside of the straight portion 3 of the hook 2, and that bearing members 22 into which each support shaft 21 is inserted so as to be rotatable are fixed to the upper surface near the end of the positioning material 8. With this configuration, the entire hook 2 swings around the support shaft 21 as a fulcrum, and the hook 2 and the positioning member 8 are always coupled together so as to be swingable. Therefore, the hook 2 moves integrally with the positioning member 8 without coming off from the positioning member 8. [Explanation of symbols]

[0033] 1 laminated steel plates, 2 hook, 3 straight section, 4 curved section, 5 arm, 6 shackle, 7 wire rope, 8 first positioning beam (positioning material), 9 through hole, 10 control bar (control member), 11 screw hole, 12 clamping bolt (scissor holding means), 13 second positioning beam, 14 separator, 15 lifting balance beam, 16a engaging piece, 16b engaging piece, 17 crane wire, 18 sheave, 19 crane hook, 20 upper wire rope, 21 support shaft, 22 bearing member.

Claims

1. A positioning frame for the hooks of a device for lifting a transported object, the device having a plurality of hook-shaped hooks each having a straight portion and a bent arm portion, the tips of the arms of which are inserted into a lifting portion of the transported object, and the device holds the transported object and lifts or hangs it down, comprising: a first positioning member extending in a direction parallel to one of a pair of parallel sides of the object; a second positioning member extending in a direction parallel to the other pair of parallel sides of the transported object, and the second positioning member is fixed to the transported object; The hooks are detachably attached to both ends of the first positioning member, A positioning frame for hooks, characterized in that when the object to be transported is held by the hooks, the hooks are fixed to the first positioning member by the weight of the object to be transported.

2. 2. The hook positioning frame according to claim 1, wherein the object to be transported is a rectangular steel plate, the first positioning member extends in a direction parallel to a short side of the steel plate, and the second positioning member extends in a direction parallel to a long side of the steel plate.

3. 3. The hook positioning frame according to claim 2, wherein at least three of said first positioning members are provided, and at least two of said second positioning members are provided.

4. The hook positioning frame of claim 1, wherein the hook is fixed by a rod-shaped regulating member provided at both ends of the first positioning material, and the regulating member is inserted into a through hole inserted into the positioning material, thereby maintaining the posture of the hook.

5. 3. The hook positioning frame according to claim 2, wherein a hoisting balance beam is provided above said first positioning member and said second positioning member, extending in the direction of extension of said second positioning member, and each of said hooks is suspended from said hoisting balance beam by a wire rope.

6. 6. The hook positioning frame of claim 5, wherein each hook engages with the wire rope directly or via a shackle.

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