Suspension hook device

Abstract

When the stacked steel plates are lifted by the crane, the posture of the hook may collapse when the steel plates are placed on the arm of the hook, and the steel plates may fall off from the arm.SOLUTION: The present invention is a lifting hook device including a positioning member for positioning a hook, and a regulating member provided on the positioning member and configured to regulate a posture of the hook, wherein when a steel plate as an object to be conveyed is lifted, a tip of an arm of the hook is inserted into a lower surface of a lifting portion of the steel plate, and then the hook is held in a predetermined posture by the regulating member.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a lifting hook device for transporting stacked iron plates and the like using a crane, which can lift and transport them safely and in a short time without using a lifting magnet. [Background technology]

[0002] Conventionally, there have been many devices that use multiple hooks to hold the edges of the steel plate being transported without using a lifting magnet. However, in both cases, the hooks only supported the edges of the steel plate from below, so if the steel plate shook during transport, the hooks could become unbalanced, causing the steel plate to come off the hook and fall, resulting in a serious accident.

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

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-95517 DISCLOSURE OF THE INVENTION [Problem to be solved by the invention]

[0005] The above-mentioned Patent Document 1 discloses a technology in which a hard member having a Vickers hardness of 400 or more is attached to the contact surface between the arm of the lifting device and the steel material, thereby preventing the steel material from coming off the lifting device. However, this technique does not restrict the posture of the mint, so it cannot solve the problems mentioned above. [Means for solving the problem]

[0006] (1) The present invention is a lifting hook device that, when lifting a transported object such as a stack of steel plates, inserts the arm of a hook-shaped hook having a straight portion and a bent arm into the lifting portion of the transported object to lift the transported object, and is equipped with a positioning member for positioning the hook and a regulating member provided on the positioning member for regulating the posture of the hook. When lifting the transported object, the arm of the hook is inserted into the underside of the lifting portion of the transported object, and then the hook is held in a predetermined posture by the regulating member.

[0007] In the present invention, a positioning member for positioning the hook and a regulating member attached to the positioning member for regulating the posture of the hook are provided, so that the posture of the hook is always firmly maintained, eliminating the risk of the steel plate coming off the hook and falling. Furthermore, one worker can set multiple hooks on a single steel plate in sequence and operate the crane by himself, eliminating the need for multiple workers to work at the same time, thereby improving work efficiency.

[0008] (2) It is desirable that the hook has a bifurcated shape with two straight portions curved and joined, a traction member is attached to the curved portion, and the positioning material is inserted between the two straight portions. When the positioning member is inserted between the two straight portions of the bifurcated shape, the position of the hook is stably maintained by the positioning member and the regulating member.

[0009] (3) It is desirable that the regulating member be removably attached to the positioning material, and that the regulating member be attached to the positioning material with the arm of the hook inserted into the underside of the steel plate, so that the posture of the hook is maintained. When the regulating member is attached to the positioning member with the arm of the hook inserted under the steel plate, the work can be carried out reliably and safely.

[0010] (4) It is desirable that the regulating member be rod-shaped and be inserted into a through-hole in the positioning member to maintain the position of the hook. When the arm of the hook is inserted into the underside of the steel plate and the rod-shaped regulating member is inserted into the through hole inserted in the positioning member, the straight part of the hook is clamped between the regulating member and the end face of the steel material, and the straight part is securely held in a vertical position, which causes the arm of the hook to firmly maintain a horizontal position and the steel plate placed on the arm of the hook to be held even more securely.

[0011] (5) It is desirable that the straight portion of the hook is clamped between the restricting member and the end of the steel plate, and that the position is maintained. When the straight portion of the hook is clamped between the restricting member and the end of the steel plate, the hook is more firmly held in its position in combination with the weight of the steel plate.

[0012] (6) It is desirable that the positioning member has a clamping means whose lower end abuts against the upper surface of the steel plate and clamps the steel plate between the upper surface of the arm of the hook. When the steel plate is clamped between the clamping means and the upper surface of the arm of the hook, the steel plate is held more securely by the hook, and the steel plate will not fall even if the entire hook swings.

[0013] (7) It is desirable that the distance between the lower end of the clamping means and the upper surface of the arm of the hook is variable. If the distance between the lower end of the clamping means and the upper surface of the arm of the hook is made variable, the distance between the lower end of the clamping means and the arm of the hook can be changed to match the thickness and shape of the steel material, making it possible to accommodate multiple types of steel plate.

[0014] (8) In the preparation stage before the steel plate is raised, it is desirable that the regulating member be detached from the positioning member. In the preparation stage before lifting the steel plate, if the regulating member is removed from the positioning member, the regulating member itself will not get in the way and the arm of the hook can be easily inserted into the underside of the steel plate. (9) Two support shafts extending opposite to each other may be provided inside the hook, and bearing members into which the support shafts are rotatably inserted may be fixed to the positioning member. Two support shafts extending opposite each other are provided inside the hook, and when the support shafts are inserted into the bearing member so as to be freely rotatable, the entire hook swings around the support shafts as a fulcrum, and the hook and positioning member are connected in a swingable manner. [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 transport 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 laminated 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 end of the wire rope 7 is engaged with each of the engagement pieces 16 b at the bottom of the hoisting balance beam 15 , and the lower end of the wire rope 7 is engaged with the shackle 6 . As mentioned 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 that the positional relationship between each hook 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 lifting hook device that, when lifting a transported object, inserts a tip of a hook-shaped hook having a straight portion and a bent arm portion into a lifting portion of the transported object, thereby holding and lifting the transported object, a positioning member for positioning the hook; a regulating member provided on the positioning member and regulating the attitude of the hook; is provided, A lifting hook device characterized in that, when the transported object is raised, the tip of the arm of the hook is inserted into the underside of the lifting part of the transported object, and then the hook is held in a predetermined position by the regulating member.

2. 2. A hanging hook device according to claim 1, wherein the hook has a bifurcated shape with two straight portions curved and joined, a traction member is attached to the curved portion, and the positioning material is inserted between the two straight portions.

3. The regulating member is removably attached to the positioning member, and the regulating member is attached to the positioning member with the tip of the arm of the hook inserted into the underside of the transported object, thereby maintaining the posture of the hook.

4. 4. The hanging hook device according to claim 3, wherein the regulating member is inserted into a through-hole that is inserted through the positioning member, thereby maintaining the position of the hook.

5. 5. A lifting hook device according to claim 4, wherein the straight portion of said hook is clamped between said regulating member and the end of the transported object, thereby maintaining its posture.

6. 2. A lifting hook device according to claim 1, wherein the positioning member has a clamping means whose lower end abuts against the upper surface of the transported object and clamps the transported object between the upper surface of the arm of the hook.

7. 7. A hanging hook device according to claim 6, wherein the distance between the lower end of said clamping means and the upper surface of said arm of said hook is variable.

8. 2. The lifting hook device according to claim 1, wherein the regulating member is detached from the positioning member in a preparation stage before the load is raised.

9. 2. A lifting hook device according to claim 1, wherein two support shafts extending opposite to each other are provided inside the hook, and bearing members into which the support shafts are rotatably inserted are fixed to the positioning member.

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