Gap forming member, lifting member, and crane device

Abstract

To provide a gap forming member, a lifting member, and a crane device that allow a hook to be easily passed through a lifting hole of an object. [Solution] A gap forming member (31) is inserted between an object (20) to be lifted by a crane apparatus (10) and the ground (60) to form a gap. The gap forming member (31) comprises a first plate-shaped portion (41) and a second plate-shaped portion (42) connected to the first plate-shaped portion (41). The first plate-shaped portion (41) is configured to be able to be lifted by the crane apparatus (10). The second plate-shaped portion (42) has an edge portion (47). The thickness of at least a portion of the second plate-shaped portion (42) gradually decreases toward the edge portion (47). An angle formed between one surface of the first plate-shaped portion (41) and one surface of the second plate-shaped portion (42) is less than 90 degrees.

Description

[Technical Field]

[0001] The present invention relates to a gap forming member, a lifting member, and a crane apparatus. [Background technology]

[0002] At construction sites, steel plates are sometimes laid on the ground. Cranes are used to transport the steel plates. The steel plates have lifting holes to allow the crane hook to be attached for easy transportation. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. WO2019 / 017409 Summary of the Invention [Problem to be solved by the invention]

[0004] It is easy to hang a wire on a hook and lift an object, as in Patent Document 1. However, when the iron plate is placed on the ground, the lifting hole is blocked by the ground, making it difficult to hang the hook on the lifting hole.

[0005] The present invention aims to provide a gap forming member that allows a hook to be easily passed through a lifting hole of an object, a lifting member equipped with the gap forming member, and a crane apparatus equipped with the lifting member. [Means for solving the problem]

[0006] The first aspect of the gap forming member is a gap forming member for inserting between an object to be lifted by a crane device and the ground to form a gap, the gap forming member comprising a first plate-shaped portion and a second plate-shaped portion connected to the first plate-shaped portion, the first plate-shaped portion being configured to be able to be lifted by a crane device, the second plate-shaped portion having an edge portion, the thickness of at least a portion of the second plate-shaped portion gradually decreasing toward the edge portion, and the angle formed between one surface of the first plate-shaped portion and one surface of the second plate-shaped portion being less than 90 degrees.

[0007] According to the gap forming member of the first aspect, the thickness of at least a portion of the second plate-shaped portion gradually decreases toward the edge portion, making it easy to insert between the ground and the object. Furthermore, since the angle between one surface of the first plate-shaped portion and one surface of the second plate-shaped portion is less than 90 degrees, the object is less likely to slip off the gap forming member when the gap forming member is lifted.

[0008] The second embodiment of the lifting member is a lifting member used in a crane apparatus to lift an object having a lifting hole, the lifting member comprising: a hook that can be inserted into the lifting hole of the object; a gap-forming member of the first embodiment for forming a gap between the object and the ground into which the hook can be inserted; and a hoisting rope for raising and lowering the gap-forming member and the hook, the hoisting rope comprising a long main portion that can be raised and lowered by a crane apparatus, a branch point located at the lower end of the main portion, a first branch portion, and a second branch portion, the upper end of the first branch portion being connected to the branch point, the lower end of the first branch portion being connected to the hook, the upper end of the second branch portion being connected to the branch point, and the lower end of the second branch portion being connected to the gap-forming member.

[0009] According to the second aspect of the lifting member, since it is equipped with a gap-forming member, a gap is formed and the hook can be easily passed through the lifting hole of the object. Furthermore, since one suspending cord is branched into a first branch and a second branch, the lifting of the gap-forming member and the lifting of the hook can be performed with one suspending cord, which simplifies the work compared to when separate suspending cords are prepared.

[0010] A crane apparatus according to a third aspect is a crane apparatus including the lifting member according to the second aspect. [Effects of the Invention]

[0011] According to the present invention, it is possible to provide a gap forming member that allows a hook to be easily passed through a lifting hole of an object, a lifting member equipped with a gap forming member, and a crane apparatus equipped with a lifting member. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a schematic configuration diagram of a crane apparatus according to an embodiment of the present invention; [Figure 2] FIG. 1 is a perspective view of an exemplary object. [Figure 3] 2 is a perspective view of the gap forming member of FIG. 1 as seen from behind. [Figure 4] FIG. 4 is a front view of the gap forming member of FIG. 3. [Figure 5] FIG. 4 is a right side view of the gap forming member of FIG. 3. [Figure 6] FIG. 1 is a side view illustrating the first stage of the lifting method. [Figure 7] FIG. 10 is a side view illustrating the second stage of the lifting method. [Figure 8] FIG. 10 is a side view illustrating the third stage of the lifting method. [Figure 9] FIG. 10 is a side view illustrating the fourth step of the lifting method. DETAILED DESCRIPTION OF THE INVENTION

[0013] (Crane equipment) 1 is a schematic diagram of a crane apparatus 10 according to this embodiment. The crane apparatus 10 includes a vehicle 11 for supporting other components and controlling the overall movement, a boom 12 extending from the vehicle 11, a crane wire 13 extending downward from the upper end of the boom 12, a crane hook 14 attached to the lower end of the crane wire 13, and a lifting member 15 suspended from the crane hook 14.

[0014] The crane hook 14 can be raised and lowered by operating the crane wire 13 extending from the vehicle 11 to the crane hook 14. The configuration for raising and lowering the lifting member 15 is not limited to that shown in the figure. For example, the lifting member 15 may be suspended from a boom that moves horizontally in a factory, or the lifting member 15 may be suspended in another manner.

[0015] 2 is a perspective view of an exemplary object 20 to be lifted by the crane apparatus 10. The object 20 is an iron plate with a lifting hole 21 penetrating it from top to bottom. When the object 20 is placed on the ground, the opening below the lifting hole 21 is blocked by the ground. In this example, the object 20 is a thin rectangular parallelepiped, but it may have other shapes, such as a disk shape.

[0016] The lifting member 15 is used in the crane apparatus 10 to lift the object 20. The lifting member 15 includes a hook 30, a gap forming member 31, and a sling 32 for raising and lowering the gap forming member 31 and the hook 30.

[0017] The hook 30 has a shape that allows it to be inserted into the lifting hole 21 of the object 20. The hook 30 has, for example, a U-shaped folded shape, but is not limited to this.

[0018] The sling 32 is a long member such as a wire, rope, or chain. The sling 32 includes a long main portion 33 that can be raised and lowered by the crane apparatus 10, a branch point 34 located at the lower end of the main portion 33, a long first branch portion 35, and a long second branch portion 36. The upper end of the first branch portion 35 is connected to the branch point 34. The lower end of the first branch portion 35 is connected to the hook 30. The upper end of the second branch portion 36 is connected to the branch point 34. The lower end of the second branch portion 36 is connected to the gap forming member 31.

[0019] The main portion 33, the first branch portion 35, and the second branch portion 36 may be formed of the same material or different materials. One or both of the first branch portion 35 and the second branch portion 36 may be formed integrally with the main portion 33 at the branch point 34, or may be configured to be detachable at the branch point 34. For example, the main portion 33 and the first branch portion 35 may be formed by a single chain, and the second branch portion 36 formed by a different chain may be detachable from the main portion 33 and the first branch portion 35 at the branch point 34.

[0020] Fig. 3 is a perspective view of the gap forming member 31 as seen from behind. Fig. 4 is a front view of the gap forming member 31. Fig. 5 is a right side view of the gap forming member 31. The gap forming member 31 is a member for forming a gap between the object 20 (Fig. 2) and the ground into which the hook 30 (Fig. 1) is inserted. The gap forming member 31 is made of a material, such as metal, that does not easily deform even when a load is applied.

[0021] As shown in Figure 3, the gap forming member 31 includes a first plate-shaped portion 41 and a second plate-shaped portion 42, both of which are thin plates. In describing the gap forming member 31, terms such as up / down, left / right, front / rear, and horizontal are used to describe the relative positional relationship and do not limit the direction in use. The lower edge of the first plate-shaped portion 41 and the rear edge of the second plate-shaped portion 42 are firmly joined at a joining portion 40. As shown in Figure 5, the gap forming member 31 has an L-shaped shape when viewed from the side.

[0022] As shown in FIG. 3, the first plate-shaped portion 41 extends vertically in an inclined manner between an upper edge 43 extending in the left-right direction and a connecting portion 40 at its lower end also extending in the left-right direction. As shown in FIG. 5, the first plate-shaped portion 41 has a front surface 44 and a rear surface 45 that are planar and parallel to each other. When the second plate-shaped portion 42 is positioned horizontally, the upper edge 43 is located above and forward of the connecting portion 40, and the first plate-shaped portion 41 is inclined relative to the second plate-shaped portion 42. The front surface 44 is the front surface, and the upper edge of the front surface 44 is located forward of the lower edge of the front surface 44. The rear surface 45 is the rear surface, and the upper edge of the rear surface 45 is located forward of the lower edge of the rear surface 45.

[0023] As shown in Fig. 3, the first plate-shaped portion 41 has a through-hole 46 near the upper edge 43. The through-hole 46 penetrates the first plate-shaped portion 41 in the thickness direction from the front surface 44 to the rear surface 45. The lower end of the second branch portion 36 is connected to the first plate-shaped portion 41 at the through-hole 46. In other words, the first plate-shaped portion 41 is configured to be able to be lifted by the crane apparatus 10 via the through-hole 46.

[0024] As shown in FIG. 3 , the second plate-shaped portion 42 extends between a front edge 47 extending in the left-right direction and the connecting portion 40 at the rear end. As shown in FIG. 5 , the second plate-shaped portion 42 has planar, parallel upper and lower surfaces 48 and 49. The second plate-shaped portion 42 has a tapered surface 50 that gradually slopes forward from the front edge of the upper surface 48 to the edge 47. That is, at the tapered surface 50, the thickness of at least a portion of the second plate-shaped portion 42 in the vertical direction gradually decreases toward the edge 47. As shown in FIG. 5 , the angle formed between the front surface 44 of the first plate-shaped portion 41 and the upper surface 48 of the second plate-shaped portion 42 is greater than 0 degrees and less than 90 degrees. In one example, the angle is greater than 45 degrees and less than 90 degrees, preferably 80 degrees.

[0025] (Lifting method) Next, a description will be given of a lifting method for lifting an object 20 having a lifting hole 21 using the crane apparatus 10 of Fig. 1. Figs. 6 to 9 are partial schematic side views illustrating first to fourth stages of the lifting method.

[0026] First, as a first step, as shown in FIG. 6, a portion of the gap forming member 31 is inserted between the ground 60 and the object 20. Specifically, the edge portion 47 of the second plate-shaped portion 42 (FIG. 5) of the gap forming member 31 is inserted under the object 20. The tapered surface 50 makes it possible to easily place the object 20 on the upper surface 48 of the second plate-shaped portion 42 (FIG. 5). By inserting the gap forming member 31, a gap can be formed between the lifting hole 21 (FIG. 2) of the object 20 and the ground 60.

[0027] Next, as a second step, the main portion 33 of the sling 32 is pulled upward as shown in Figure 7. This causes the gap forming member 31 to rise via the second branch portion 36, causing the object 20 to rise at least partially, widening the gap between the lifting hole 21 (Figure 2) of the object 20 and the ground 60.

[0028] Next, as a third step, as shown in Figure 8, the hook 30 is inserted into the lifting hole 21 (Figure 2) of the at least partially raised object 20, and then the gap forming member 31 is removed from the object 20 with the hook 30 inserted into the lifting hole 21. The gap makes it easy to insert the hook 30.

[0029] Next, as a fourth step as shown in Figure 9, with the hook 30 inserted into the lifting hole 21 (Figure 2) and the gap-forming member 31 removed from the object 20, the main part 33 of the lifting rope 32 is pulled upward, thereby raising the hook 30 via the first branch part 35 and lifting the object 20.

[0030] (summary) According to the gap forming member 31 of the first aspect, the thickness of at least a part of the second plate-shaped portion 42 gradually decreases toward the edge portion 47, making it easy to insert between the ground 60 and the object 20. Furthermore, since the angle formed between one surface of the first plate-shaped portion 41 and one surface of the second plate-shaped portion 42 is less than 90 degrees, the object 20 is less likely to slip off the gap forming member 31 when the gap forming member 31 is lifted.

[0031] The second aspect of the lifting member 15 includes the gap-forming member 31, which forms a gap and allows the hook 30 to be easily passed through the lifting hole 21 of the object 20. Furthermore, one suspending cord 32 branches into the first branch 35 and the second branch 36, so that the lifting of the gap-forming member 31 and the lifting of the hook 30 can be performed with one suspending cord 32, simplifying the work compared to when separate suspending cords 32 are prepared. [Explanation of symbols]

[0032] 10...Crane device, 11...Vehicle, 12...Boom, 13...Crane wire, 14...crane hook, 15...lifting member, 20...object, 21...lifting hole, 30... Hook, 31... Gap forming member, 32... Suspension rope, 33... Main part, 34... Branch point, 35...first branch portion, 36...second branch portion, 41...first plate-shaped portion, 42...second plate-shaped portion, 40...Joining part, 43...Top edge, 44...Front surface, 45...Rear surface, 46...Through hole, 47...Edge part, 48...Top surface, 49...Bottom surface, 50...Tapered surface, 60...Ground surface

Claims

1. A gap forming member for forming a gap between an object to be lifted by a crane device and the ground, The gap forming member is a first plate-shaped portion; a second plate-shaped portion coupled to the first plate-shaped portion; Equipped with the first plate-shaped portion is configured to be able to be lifted by the crane device, the second plate-shaped portion has an edge portion; a thickness of at least a part of the second plate-shaped portion gradually decreases toward the edge portion; An angle formed between one surface of the first plate-shaped portion and one surface of the second plate-shaped portion is less than 90 degrees. Gap forming member.

2. A lifting member used in a crane apparatus for lifting an object having a lifting hole, comprising: The lifting member is a hook that can be inserted into the lifting hole of the object; a gap forming member according to claim 1 for forming a gap between the object and the ground into which the hook is inserted; a sling for raising and lowering the gap forming member and the hook; Equipped with The sling is a long main portion that can be raised and lowered by the crane device; a branch point located at the lower end of the main portion; a first branch; a second branch; and Equipped with an upper end of the first branch portion is connected to the branch point; a lower end of the first branch portion is connected to the hook; an upper end of the second branch portion is connected to the branch point; a lower end of the second branch portion is connected to the gap forming member; The lifting member.

3. A crane apparatus comprising the lifting member according to claim 2.

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