Hanging auxiliary tool, and hanging method for metallic material

Abstract

To simplify the work of hanging a metallic material 2.SOLUTION: A hanging auxiliary tool 1 used for hanging a metal material 2 is a metal plate-like member, has a first surface 3a and a second surface 3b opposite to the first surface 3a, the metal material 2 is a bottom board 3 which is loaded on a second surface 3b side and a rod-like member made of a different material from the bottom board 3, two or more first spacers 4 fixed in parallel to a first surface 3a side of the bottom board 3 is provided.SELECTED DRAWING: Figure 3B

Description

[Technical field]

[0001] The present invention relates to a lifting aid and a method for lifting metal materials. [Background technology]

[0002] Metal materials such as slabs are loaded onto and unloaded from transport aircraft such as ships. At this time, a lifting tool may be used to suspend (hoist up and lower) the metal materials (Patent Document 1). The hoisting tool includes, for example, a pair of legs and claws provided at the tips of the legs. The pair of claws is inserted into the bottom surface of the metal material, and the hoisting tool is raised using a crane or the like. This allows the metal material to be lifted into the air. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2005-324930 A Summary of the Invention [Problem to be solved by the invention]

[0004] Conventionally, from the viewpoint of cost reduction and the like, there has been a demand for simplifying the work process when suspending (hoisting up or lowering) metal materials. SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to simplify the work of suspending metal materials. [Means for solving the problem]

[0005] As a result of extensive investigations, the present inventors have found that the above object can be achieved by employing the following configuration, and have completed the present invention. That is, the present invention provides the following [1] to [5]. [1] A suspension aid used for suspending metal materials, comprising: a base plate, a metal plate-shaped member having a first surface and a second surface opposite to the first surface, with the metal material being loaded on the second surface side; and two or more first spacers, rod-shaped members made of a material different from the base plate, fixed in parallel to the first surface side of the base plate. [2] The suspension aid described in [1] above, further comprising two or more second spacers which are rod-shaped members made of a material different from that of the floor plate and which are fixed in parallel to the second surface side of the floor plate, and the metal material is loaded onto the second surface side of the floor plate via the second spacers. [3] The suspension aid described in [2] above, wherein the first spacer and the second spacer are positioned so as not to overlap each other via the base plate. [4] The suspension aid described in any one of [1] to [3] above, wherein the metal material is a slab. [5] A method for suspending a metal material using the auxiliary suspending device described in any one of [1] to [4] above and a suspending tool having a pair of claw portions, in which the metal material is loaded on the second surface side of the base plate and the suspending tool is raised or lowered with the claw portions inserted into the space between adjacent first spacers. Effect of the Invention

[0006] According to the present invention, the work of suspending metal materials can be simplified. [Brief description of the drawings]

[0007] [Figure 1A] FIG. 2 is a perspective view showing metal materials stacked one on top of the other. [Figure 1B] FIG. 2 is a side view showing metal materials stacked one on top of the other. [Figure 1C] 2 is a cross-sectional view taken along line AA′ of FIG. 1B. [Figure 2A] 1 is a cross-sectional view showing a process of lifting a metal material using a lifting tool, in which the upper lot is lifted. FIG. [Figure 2B]1 is a cross-sectional view showing a process of lifting a metal material using a lifting tool, in which a spacer between an upper lot and a lower lot is removed. FIG. [Figure 2C] 1 is a cross-sectional view showing a process of lifting a metal material using a lifting tool, in which the lower lot is shown lifted. FIG. [Figure 2D] 1 is a cross-sectional view showing a process of lifting a metal material using a lifting tool, in which a spacer between a lower lot and a horizontal surface is removed. [Figure 3A] FIG. 1 is a perspective view showing a suspension auxiliary device according to a first embodiment. [Figure 3B] FIG. 2 is a side view showing the suspension aid of the first embodiment. [Figure 3C] 3B is a cross-sectional view taken along line BB' of FIG. 3B. [Figure 4] FIG. 4 is an enlarged cross-sectional view showing a portion of the suspension auxiliary device. [Figure 5A] 1 is a cross-sectional view showing a process of lifting a metal material using a lifting aid and a lifting tool, showing the state in which the upper lot has been lifted. FIG. [Figure 5B] 1 is a cross-sectional view showing a process of lifting a metal material using a lifting aid and a lifting tool, showing the state in which the lower lot has been lifted. FIG. [Figure 6A] FIG. 11 is a perspective view showing a suspension auxiliary device according to a second embodiment. [Figure 6B] FIG. 11 is a side view showing a hanging auxiliary device of a second embodiment. [Figure 6C] 6B is a cross-sectional view taken along line CC'. FIG. [Figure 7] FIG. 11 is a side view showing the lifting aids of the second embodiment stored in a stacked state. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] [Prior Art] First, the conventional technology will be described with reference to FIGS. 1A to 1C and 2A to 2D.

[0009] Fig. 1A is a perspective view showing stacked metal materials 2. Fig. 1B is a side view showing stacked metal materials 2. Fig. 1C is a cross-sectional view taken along line AA' in Fig. 1B. A plurality of metal materials 2 (three sheets in Figs. 1A to 1C) stacked on top of each other constitute a single lot 6. In Figs. 1A to 1C, two upper and lower lots 6 (lot 6a and lot 6b) are arranged on a horizontal plane 9.

[0010] When hanging rod 6 using hanging tool 21 (see FIGS. 2A to 2D), space 7 is required below the bottom surface of rod 6 for inserting claw portion 23 of hanging tool 21. 1A to 1C, a spacer 31 is sandwiched between the upper lot 6a and the lower lot 6b, and another spacer 31 is sandwiched between the lower lot 6b and the horizontal surface 9. The spacer 31 is, for example, a rectangular prism-shaped piece of wood.

[0011] 2A to 2D are cross-sectional views showing a process of hoisting metal material 2 using a hoist 21. As shown in Fig. 2A, hoist 21 includes a pair of legs 22 and claws 23 provided at the tips of legs 22, and is connected to a crane (not shown).

[0012] First, as shown in Fig. 2A, the upper lot 6a is lifted. Specifically, the pair of claws 23 are inserted into the space 7 below the bottom surface of the lot 6a, and in this state, the lifting tool 21 is raised using a crane. As a result, the lot 6a is lifted. Thereafter, as shown in FIG. 2B, a worker (not shown) removes the spacer 31 that was sandwiched between the upper lot 6a and the lower lot 6b. Next, as shown in FIG. 2C, the lower lot 6b is lifted in the same manner as the upper lot 6a. Finally, as shown in FIG. 2D, a worker removes the spacer 31 that was sandwiched between the lower lot 6b and the horizontal surface 9. The removed spacer 31 is returned to, for example, a location separate from the metal material 2 (lot 6) and stored.

[0013] When suspending the lots 6a and 6b in order, the spacer 31 is first placed on the horizontal surface 9, and the suspending tool 21 is lowered onto the spacer 31 to suspend the lot 6a. Next, another spacer 31 is placed on the suspended rod 6a, and the rod 6b is suspended on top of that.

[0014] As described above, conventionally, when hoisting (hanging) metal material 2, in addition to the work of operating the hoisting tool 21 to hoist (hang) metal material 2, work related to spacer 31 (work of removing spacer 31, work of placing spacer 31) is required.

[0015] In particular, for example, when moving metal material 2 (lot 6) from inside the ship to outside the ship, it is necessary to deploy separate workers for removing the spacers 31 inside the ship and for returning the removed spacers 31 to a storage location outside the ship, which makes the process more complicated.

[0016] Next, a preferred embodiment of the present invention, which has been made in consideration of the above-mentioned conventional techniques, will be described. First, the first embodiment will be described with reference to FIGS. 3A to 5B.

[0017] [First embodiment] Fig. 3A is a perspective view showing the suspension aid 1 of the first embodiment, Fig. 3B is a side view showing the suspension aid 1 of the first embodiment, and Fig. 3C is a cross-sectional view taken along line BB' in Fig. 3B. 3A to 3C also show a metal material 2 (lot 6) together with the hanging auxiliary device 1. The metal material 2 may be, for example, a slab, which is a plate-shaped steel material. The lifting aid 1 is used to hoist (or lower) a batch 6 made up of a plurality of stacked metal material sheets 2 (three sheets in Figs. 3A to 3C) all at once. Note that, although a state in which multiple sheets (three sheets in Figs. 3A to 3C) of metal material 2 are stacked is described as one lot 6, this is not limiting. For example, multiple lumps (lumps made of metal material) fixed in an aligned state may be one lot 6, or one large lumps may be one lot 6.

[0018] 3A to 3C, a lifting aid 1 is disposed between an upper rod 6a and a lower rod 6b. Furthermore, another lifting aid 1 is disposed between the lower rod 6b and a horizontal plane 9. The metal material 2 (lot 6) and the lifting aid 1 are transported in a state where they are stacked alternately as shown in Figs. 3A to 3C, and placed on a horizontal surface 9 such as a loading area.

[0019] The suspension aid 1 includes a base plate 3 which is a plate-shaped member. The sole plate 3 has a first surface 3a and a second surface 3b opposite to the first surface 3a. The multiple metal materials 2 stacked one on top of the other are loaded on the second surface 3b side of the sole plate 3. The sole plate 3 is made of metal. This ensures the strength required to support the stacked metal materials 2. When the metal material 2 is a slab, the metal constituting the sole plate 3 is preferably steel (iron and steel) from the standpoints of strength and cost.

[0020] In order to prevent claw portion 23 of suspender 21 from contacting metal material 2, it is preferable that the width of base plate 3 (the distance in the left-right direction in FIG. 3C) be greater than the width of metal material 2. For the same reason, it is preferable that the length of the sole plate 3 (the distance in the left-right direction in FIG. 3B) is greater than the length of the metal material 2.

[0021] In the first embodiment, it is preferable that the second surface 3b of the sole plate 3, which is in contact with the metal material 2, has a certain degree of roughness. This is to fix the metal material 2, which is in contact with the second surface 3b of the sole plate 3, in position by friction and prevent the load from shifting. An example of the sole plate 3 made of steel and having a certain degree of roughness on the second surface 3b is a slab having scale attached to its surface.

[0022] The suspension aid 1 further includes a plurality of first spacers 4 which are rod-shaped members. The plurality of first spacers 4 are fixed to the first surface 3a of the base plate 3 and are arranged parallel to one another.

[0023] In addition, descriptions of angles such as "parallel" and "horizontal" are concepts that include a technically acceptable range of error (the same applies below).

[0024] Although two first spacers 4 are shown for each hanging auxiliary device 1 in Figs. 3A to 3C, the number of first spacers 4 is not particularly limited as long as it is two or more. However, as described below, the claw portions 23 of the suspender 21 are inserted into the spaces 7 between adjacent first spacers 4. If there are too many first spacers 4, the spaces 7 may become narrow. Therefore, the number of first spacers 4 is appropriately selected according to the size of the claw portions 23, etc.

[0025] The thickness of the first spacer 4 (the distance in the vertical direction in FIG. 3B) is a distance that ensures the space 7 into which the claw portion 23 can be inserted.

[0026] It is preferable that first spacer 4 is disposed along the direction in which claw portion 23 of hanging device 21 enters space 7. In other words, it is preferable that the longitudinal direction of first spacer 4 and the direction in which claw portion 23 enters space 7 are parallel to each other. This makes it easier for claw portion 23 to be inserted into the opening of space 7.

[0027] The material of the first spacer 4 is different from the material of the sole plate 3, which is metal (for example steel). A suitable example of the first spacer 4 is a rectangular prism-shaped piece of wood. This allows the first spacer 4 to suppress misalignment with the metal material 2 that it comes into contact with by friction, and also makes it easy to ensure the strength required to support the metal material 2 and the base plate 3.

[0028] As described above, the first spacer 4 is fixed to the sole plate 3 . A method for fixing the first spacer 4 to the sole plate 3 will be described with reference to FIG. FIG. 4 is an enlarged cross-sectional view showing a part of the hanging auxiliary device 1. As shown in FIG. As a method for fixing the first spacer 4 to the base plate 3, for example, as shown in FIG. 4, an angle iron 11, which is a steel material having an L-shaped cross section, may be used. In this case, specifically, first, a pair of angle irons 11 are welded to the first surface 3a of the floor plate 3 while ensuring a space for the first spacer 4 to fit in. Next, the first spacer 4 is fitted between the pair of angle irons 11 welded to the floor plate 3 and fixed using screws 12. In this way, the first spacer 4 is fixed to the first surface 3a of the floor plate 3.

[0029] Furthermore, as long as a certain level of strength (such as strength to support multiple sheets of metal material 2, strength to withstand friction with the contacting metal material 2, etc.) can be ensured, the method of fixing the first spacer 4 to the base plate 3 is not limited to the method described based on Figure 4.

[0030] A second spacer 5 (see FIGS. 6A and 6B), which will be described later, is also fixed to the base plate 3 in the same manner as the first spacer 4.

[0031] Next, a method for hoisting the metal material 2 (lot 6) using the auxiliary hoisting tool 1 and the hoisting tool 21 will be described with reference to Figs. 5A and 5B.

[0032] 5A and 5B are cross-sectional views showing a process of hoisting metal material 2 using auxiliary hoisting tool 1 and hoisting tool 21. FIG. First, as shown in FIG. 5A, the upper rod 6a is lifted up. Specifically, the pair of claws 23 are inserted into the space 7 below the first surface 3a of the sole plate 3 of the lifting aid 1, and in this state, the lifting tool 21 is raised using a crane. As a result, the rod 6a is lifted. Next, as shown in FIG. 5B, the lower lot 6b is lifted up in the same manner as the upper lot 6a.

[0033] When suspending the lots 6a and 6b in sequence, the hoisting tool 21 is first lowered to suspend the lot 6a together with the auxiliary hoisting tool 1 onto the horizontal surface 9. Next, the lot 6b together with the auxiliary hoisting tool 1 is similarly suspended above the suspended lot 6a. As a result, the metal material 2 (lot 6) and the lifting auxiliary tool 1 are again stacked alternately (see Figs. 3A to 3C), and are transported in this state, for example, to the destination.

[0034] According to this embodiment, the work on the spacer 31 by a worker (see FIG. 2B and FIG. 2D), which was necessary in the conventional technology, can be omitted. Therefore, the work of lifting (or lowering) the metal material 2 can be generally simplified, and the number of workers can be reduced. Since the spacers 31 require a process of collecting them all together and returning them to a storage location, the effect of reducing the overall number of steps by eliminating this process is extremely large. In addition, since the work related to the spacer 31 is omitted and only the work of operating the hoisting tool 21 (crane) remains, the entire work process can be mechanized.

[0035] Next, a second embodiment will be described with reference to FIGS. 6A to 7. FIG.

[0036] [Second embodiment] Fig. 6A is a perspective view showing the suspension aid 1 of the second embodiment, Fig. 6B is a side view showing the suspension aid 1 of the second embodiment, and Fig. 6C is a cross-sectional view taken along line CC' in Fig. 6B. The suspension aid 1 of the second embodiment differs from the first embodiment in that it further comprises a plurality of second spacers 5 which are rod-shaped members. The second spacers 5 are fixed in parallel to the second surface 3b of the base plate 3. The fixing method is as described above.

[0037] Although two second spacers 5 are illustrated for each suspension aid 1 in Figs. 6A to 6C, the number of second spacers 5 is not particularly limited as long as it is two or more. However, as described below, the claw portions 23 of the hanging device 21 may also be inserted into the spaces between adjacent second spacers 5, so the number of second spacers 5 is selected appropriately according to the size of the claw portions 23, etc.

[0038] The metal material 2 (lot 6) is loaded on the second surface 3b side of the sole plate 3 via a second spacer 5. The material of the second spacers 5 is different from the metal material of the bottom plate 3. For the same reasons as the first spacers 4, the second spacers 5 are preferably made of wood in the shape of a rectangular pillar.

[0039] In the second embodiment, the method of hoisting (or suspending) the metal material 2 (lot 6) using the auxiliary hoisting tool 1 and the hoisting tool 21 is the same as in the first embodiment (see Figures 5A to 5B), and therefore will not be described.

[0040] In the second embodiment, the claw portion 23 can be inserted into the space between adjacent second spacers 5, and in that state, the lifting device 21 can be raised to lift only the metal material 2 (lot 6) and remove it from the lifting aid 1. In this case, the lifting aid 1 from which the metal material 2 (lot 6) has been detached can be collected and stored.

[0041] FIG. 7 is a side view showing the hanging auxiliary device 1 of the second embodiment stored in a stacked state. The first spacer 4 and the second spacer 5 are disposed in parallel to each other. 7, the first spacer 4 and the second spacer 5 are preferably arranged at positions where they do not overlap each other via the base plate 3. Furthermore, the thickness of the second spacer 5 (the distance in the vertical direction in FIG. 7) is preferably smaller than the thickness of the first spacer 4. As a result, as shown in FIG. 7, the lower second spacer 5 can be accommodated in the upper space 7, allowing a plurality of hanging auxiliary devices 1 to be compactly accommodated and stored. [Explanation of symbols]

[0042] 1: Lifting aid 2: Metal material 3: Floor plate 3a: 1st page 3b: 2nd side 4: First spacer 5: Second spacer 6:Lot 7: Space 9: Horizontal plane 11: Angle iron 12: Screw 21: Hanging device 22: Legs 23: Claw part 31: Spacer

Claims

1. A hanging aid used for hanging metal materials, a base plate made of metal having a first surface and a second surface opposite to the first surface, the base plate being loaded with the metal material on the second surface side; A suspension aid comprising: two or more first spacers, which are rod-shaped members made of a material different from that of the base plate and which are fixed in parallel to the first surface side of the base plate.

2. a rod-shaped member made of a material different from that of the floor plate, and two or more second spacers fixed in parallel to the second surface side of the floor plate; The suspension aid according to claim 1 , wherein the metal material is loaded on the second surface side of the base plate via the second spacer.

3. The suspension aid according to claim 2 , wherein the first spacer and the second spacer are arranged in positions not overlapping each other via the base plate.

4. The lifting aid according to claim 1 , wherein the metal material is a slab.

5. A method for suspending a metal material, comprising suspending the metal material using the suspending aid according to any one of claims 1 to 4 and a suspending tool having a pair of claw portions, the method comprising: A method for suspending a metal material, comprising: loading the metal material on the second surface side of the base plate; and raising or lowering the suspending tool with the claw portion inserted into the space between adjacent first spacers.

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