Gripping tool and divided column assembly method

Abstract

To provide a gripping tool and a divided column assembly method capable of safely adjusting the upper column position by a worker when the upper column is assembled with respect to the already installed lower column among the divided columns.SOLUTION: A gripping tool 1 according to the present invention is the gripping tool used for assembling a divided column consisting of multiple columns. It is characterized that a belt-shaped gripping tool body 11 comprises one or multiple gripping parts 12 and a tightening part 13 to tie the gripping tool body 11 to the column.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a gripping tool and a split column assembling method for assembling an upper column to a lower column when erecting a split column having multiple columns. [Background technology]

[0002] Conventionally, when assembling split columns made of concrete or metal, a split column assembling device is used, as shown in Patent Document 1. Specifically, the split column assembling device is attached to an already installed lower column, and the upper column is lifted with a rope and assembled to the lower column.

[0003] In addition, conventionally, the upper pillar is lifted by winding a rope with a winch on an aerial work platform, and then the lower pillar is assembled. In either case, assembly work at a high altitude is required. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Utility Model Registration No. 3215144 Summary of the Invention [Problem to be solved by the invention]

[0005] When the upper pillar is lifted with a rope and assembled to the lower pillar as described above, the worker lowers the upper pillar while adjusting the position of the upper pillar relative to the lower pillar.

[0006] When assembling by fitting the ends of the upper and lower columns, even if the upper column is lowered while adjusting its position, if the center axes of the upper and lower columns are misaligned, the joint between the upper and lower columns may get stuck and the columns may not fit properly. In this case, the worker will shake the upper column back and forth and side to side to release the stuck, but the upper column may suddenly fall the moment the stuck is released.

[0007] The present invention has been made in consideration of these points, and aims to provide a gripping tool and a split column assembly method that allow workers to safely adjust the position of the upper column when assembling the upper column to the lower column that has already been installed. [Means for solving the problem]

[0008] As a means for solving the problems of the above-mentioned background art, the gripping tool of the invention described in claim 1 is a gripping tool used to assemble a split pillar consisting of multiple pillars, characterized in that the belt-shaped gripping tool body has one or more handle portions and a tightening portion that fastens the gripping tool body to the pillar.

[0009] The invention described in claim 2 is characterized in that in the gripping tool described in claim 1, the gripping tool body and the handle are made of a belt-like fiber material.

[0010] The invention as set forth in claim 3 is characterized in that the gripping tool as set forth in claim 1 or 2 further comprises a locking portion that is locked onto a rope used to lift the pillar.

[0011] The invention described in claim 4 is a split column assembling method for assembling an upper column to a lower column of split columns using the gripping device described in claim 1 or 2, characterized in that the rope for lifting the upper column is attached above the center of gravity of the upper column, the gripping device is fastened to the upper column, the upper column is lifted up to above the lower column with the rope, the position of the upper column is adjusted using the handle, and the upper column is lowered to join the upper and lower columns.

[0012] The invention described in claim 5 is a method for assembling split columns using the gripping device described in claim 3 to assemble an upper column to a lower column of the split columns, characterized in that the rope for lifting the upper column is attached above the center of gravity of the upper column, the gripping device is fastened above the rope attachment position of the upper column, the upper column is lifted up to above the lower column with the rope, the locking part is locked to the rope, the position of the upper column is adjusted using the handle part, and the upper column is lowered to join the upper and lower columns. [Effects of the Invention]

[0013] According to the gripping device and split column assembly method of the present invention, when assembling an upper column to an already installed lower column of a split column, the worker can safely adjust the position of the upper column. [Brief explanation of the drawings]

[0014] [Figure 1] 1 is a perspective view showing a gripping tool according to the present invention; [Figure 2] FIG. 10 is an enlarged view showing the fixing portion of the handle. [Figure 3] FIG. 10 is an enlarged view showing a loop portion that connects the locking portions. [Figure 4] This is a diagram illustrating the work of attaching a sling belt to the upper pillar and fastening the gripping tool. [Figure 5] 10A and 10B are diagrams illustrating the process of assembling the upper pillar to the lower pillar. [Figure 6] 6 is a diagram illustrating the operation of the worker in FIG. 5 to lock the locking part onto the rope. FIG. [Figure 7] FIG. 1 is an elevation view of a split column. DETAILED DESCRIPTION OF THE INVENTION

[0015] An embodiment of the present invention will be described with reference to the drawings.

[0016] The gripping tool 1 shown in Fig. 1 is used when assembling a split column consisting of multiple columns. For example, the gripping tool 1 is used when assembling an upper column to an already installed lower column among multiple columns.

[0017] The split column has a configuration, for example, as shown in Figure 7. In this example, the split column 2 is made up of an upper column 21 (upper column), a lower column 22 (lower column), and a base column 23. The upper column 21 and lower column 22 are cylindrical steel pipes, and the base column 23 is a concrete cylinder. The inner surface of the lower end of the upper column 21 and the outer surface of the upper end of the lower column 22 form a joint, and the inner surface of the lower end joint of the upper column 21 and the outer surface of the upper end joint of the lower column 22 form tapered surfaces.

[0018] In addition, markers (standard joint positions) are provided at the joints of the upper column 21 and the lower column 22. By adjusting the circumferential direction of the upper column 21 so that both markers are aligned, and aligning the central axes of the upper column 21 and the lower column 22, the upper column 21 is lowered and fitted into the lower column 22, whereby the upper column 21 and the lower column 22 are properly joined.

[0019] The lower end of the lower pillar 22 also has a joint, which is designed to fit into the joint at the upper end of the base pillar 23. The method of joining the lower pillar 22 and the base pillar 23 is the same as the method of joining the upper pillar 21 and the lower pillar 22.

[0020] As shown in Fig. 1, the gripping tool 1 comprises a gripping tool body 11, a handle portion 12, and a fastening portion 13. In this embodiment, the gripping tool body 11 is a belt made of a fibrous material.

[0021] The gripping tool 1 also has one or more handles 12. In this embodiment, the gripping tool 1 has handles 12 in three locations. The handles 12 are belts made of the same fiber material as the gripping tool body 11, and both ends of the handles are sewn to the gripping tool body 11 for fastening. Figure 2 shows the fastening part 12a of the handle. The handles 12 are fastened to the gripping tool body 11 with a space formed between them large enough for an operator to insert their hands. The handles 12 are preferably made of a flexible material such as a fiber belt or rope, as in this embodiment. The handles 12 can be fastened to the gripping tool body 11 by other methods than sewing, such as with a cable tie.

[0022] The gripping tool 1 also has a fastening portion 13 at one end of the gripping tool body 11. In this embodiment, the fastening portion 13 is a cam-type buckle. The fastening portion 13 may have another configuration, such as a ratchet-type buckle, as long as it can wrap and fasten the gripping tool body 11 around the upper pole 21.

[0023] The handle portion 12 and the fastening portion 13 are attached to the gripping tool body 11 so that the handle portion 12 faces outward when the gripping tool 1 is wrapped around and fastened to the upper pole 21.

[0024] The gripping tool 1 may also be configured to include a locking portion 14 that is locked onto the rope 31 used to lift the upper pole 21. In this embodiment, a carabiner is used as the locking portion 14. The carabiner is locked onto the rope 31 by opening the opening / closing portion 14a of the carabiner and passing the rope 31 inside the carabiner. The locking portion 14 does not have to be configured to include the opening / closing portion 14a like a carabiner, and may be any other configuration that can be locked onto the rope 31, such as a hook.

[0025] In this embodiment, the locking portion 14 is attached to the gripping tool main body 11 via the loop portion 15. As shown in FIG. 3 , the loop portion 15 is a belt made of the same flexible fiber material as the gripping tool main body 11, and is formed into a ring shape by sewing both ends together (loop portion stitching portion 15a). The gripping tool main body 11 is passed inside the loop portion 15. In this embodiment, the gripping tool main body 11 is passed inside the loop portion 15 between the tightening portion 13 and the handle portion 12 closest to the tightening portion 13. By connecting the loop portion 15 and the locking portion 14 in a chain shape, the gripping tool 1 is configured to include the locking portion 14 on the gripping tool main body 11 via the loop portion 15. As will be described in detail later, this configuration allows the worker to freely change the direction of the locking portion 14 when the gripping tool 1 is fastened to the upper pole 21, making it easier to lock the locking portion 14 to the rope 31 used to lift the upper pole 21.

[0026] Next, we will explain how to assemble the upper column 21 to the lower column 22 of the divided column 2 using the gripping tool 1. Specifically, we will explain how to assemble the upper column 21 to the top end of the lower column 22 using the gripping tool 1 when the base column 23 and the lower column 22 of the divided column 2 have already been joined and erected on site.

[0027] 4 shows a state in which a sling belt 32 is attached to the upper pole 21 and the gripping tool 1 is fastened above it. The sling belt 32 is shown as a sling belt for lifting, but it may also be a steel sling wire.

[0028] Figure 5 is a diagram illustrating the work of assembling the upper pillar 21 to the lower pillar 22. From the state shown in Figure 4, the rope 31 is attached to the sling belt 32, and as shown in Figure 5(a), the rope 31 is wound up with the winch of the aerial work platform to lift up the upper pillar 21. The rope 31 is, for example, a winch rope. Next, as shown in Figure 5(b), with the upper pillar 21 lifted up to the worker's hand, the worker grasps the handle portion 12 of the gripping tool 1 to bring the upper pillar 21 into a vertical position.

[0029] Finally, as shown in Figure 5(c), by moving the bucket 4 of the aerial work vehicle, the upper pillar 21 is positioned directly above the lower pillar 22, and the upper pillar 21 is lowered by the rope 31 and joined to the lower pillar 22. When joining, the worker grasps the handle portion 12 of the gripping tool 1 to maintain the vertical state of the upper pillar 21 and align the central axes of the upper pillar 21 and the lower pillar 22, and while adjusting the circumferential direction of the upper pillar 21 so that the markers of the upper pillar 21 and the lower pillar 22 coincide, lowers the upper pillar 21 to fit into the lower pillar 22.

[0030] Here, if the central axes of the upper column 21 and the lower column 22 do not align and the upper column 21 is being fitted to the lower column 22, the upper end of the lower column 22 may come into contact with the tapered surface on the inner surface of the lower end of the upper column 21, or the lower end of the upper column 21 may come into contact with the tapered surface on the outer surface of the upper end of the lower column 22, causing a jamming and preventing the upper column 21 from being properly fitted to the lower column 22. In this case, the worker can release the jamming by grasping the handle portion 12 and shaking the upper column 21 back and forth and side to side.

[0031] In the conventional work method, a worker would grab the bolt inserted into the arm tie mounting hole of the upper pillar 21 and shake it back and forth and side to side. If there was a structure such as an arm under the bolt, the upper pillar 21 would suddenly drop when the catch was released, and there was a risk that the worker's hand would be caught between the bolt and the structure such as the arm.

[0032] However, by using the gripping tool 1 of this embodiment, the position of a structure such as an arm that will be close to the upper pole 21 can be confirmed at the work site, and the gripping tool 1 can be fastened to the upper pole 21 at a height or circumferential position where the handle portion 12 does not come close to that position, thereby eliminating the risk of being pinched as described above. Furthermore, even if the gripping tool 1 is fastened to the upper pole 21 at a height close to the structure such as an arm, the provision of multiple handle portions 12 on the gripping tool 1 allows it to be gripped at any position in the circumferential direction of the upper pole 21. This allows the worker to grasp the handle portion 12 that is not in contact with the structure such as an arm, thereby eliminating the risk of being pinched as described above. Even if the worker's hand is pinched between the handle portion 12 and the structure such as an arm, if the handle portion 12 is made of a flexible fiber material, the impact on the worker's hand can be reduced compared to the conventional method of getting pinched between the structure such as an arm while holding a bolt.

[0033] Furthermore, when adjusting the position of the upper pillar 21 by inserting a bolt into the arm tie mounting hole of the upper pillar 21 and gripping the bolt, as in the conventional work method, the bolt portion that can be gripped is limited. Specifically, because the bolt is inserted into the arm tie mounting hole and passes through the upper pillar 21, only two bolt portions can be gripped. However, with the gripping tool 1 of this embodiment, by providing multiple handles 12, it is possible to grip almost all positions around the circumference of the upper pillar 21 at the height position where the gripping tool 1 is fastened, making it easier to assemble the upper pillar 21 to the lower pillar 22.

[0034] In this embodiment, the gripping device 1 is fastened to the upper pillar 21 above the attachment position of the rope 31, but it is also possible to fasten the gripping device 1 below the attachment position of the rope 31 and assemble the upper pillar 21 to the lower pillar 22.

[0035] Next, the operation of the worker to fasten the fastening portion 14 to the rope 31 will be described with reference to Fig. 6. In this case, the gripping tool 1 is fastened to the upper pole 21 above the attachment position of the rope 31.

[0036] 6(a) shows the state before the worker engages the engaging portion 14 with the rope 31, FIG. 6(b) shows the state when the worker engages the engaging portion with the rope 31, and FIG. 6(c) shows the state after the engaging portion 14 has been engaged with the rope 31. Before the engaging portion 14 is engaged with the rope 31, the upper pillar 21 is suspended at a considerable incline relative to the vertical direction. In contrast, by engaging the engaging portion 14 with the rope 31, the worker can bring the upper pillar 21 closer to a vertical state without having to grasp the upper pillar 21. This reduces the burden on the worker who brings the upper pillar 21 into a vertical state and joins it to the lower pillar 22.

[0037] As described above, the locking part 14 is connected to the gripping tool body 11 via the loop part 15, which is made of a flexible fiber material. With this configuration, the worker can freely change the direction of the locking part 14 while the gripping tool 1 is fastened to the upper pole 21, and can easily bring the opening / closing part 14a of the locking part 14 close to the rope 31 to lock the locking part 14 to the rope 31.

[0038] In the above embodiment, a method of assembling the upper pillar 21 to the lower pillar 22 was described in which the gripping device 1 was fastened to the upper pillar 21. However, when assembling the lower pillar 22 (upper pillar) to the base pillar 23 (lower pillar), the gripping device 1 is fastened to the lower pillar 22 and assembly is carried out in the same manner as in the above embodiment. [Explanation of symbols]

[0039] 1 Grip 11 Grip body 12 Handle 12a Handle fixing part 13 Fastening part 14 Locking part 14a Opening and closing section 15 limbus 15a Limbal stitching 2 split pillars 21 Upper pillar 22 Lower pillar 23 Pillar 31 Rope 32 Sling Belt 4 buckets

Claims

1. A gripping tool used to assemble a split column consisting of multiple columns, The belt-shaped gripping tool body is provided with one or more handles and a fastening part for fastening the gripping tool body to the pillar. A gripping tool characterized by:

2. 2. The gripping tool according to claim 1, wherein the gripping tool body and the handle are made of a belt-like fiber material.

3. 3. The gripping tool according to claim 1, further comprising a locking portion that is locked to a rope for lifting the pillar.

4. 3. A split column assembling method for assembling an upper column to a lower column of the split columns using the gripping tool according to claim 1 or 2, A rope for lifting the upper pillar is attached above the center of gravity of the upper pillar, The gripping tool is fastened to the upper pillar, The upper pillar is lifted up to above the lower pillar by the rope, The upper pillar is lowered while adjusting the position of the upper pillar by the handle portion, and the upper pillar and the lower pillar are joined together. A method for assembling split columns.

5. A split column assembling method for assembling an upper column to a lower column of the split columns using the gripping tool according to claim 3, The rope for lifting the upper pillar is attached above the center of gravity of the upper pillar, The gripping tool is fastened to the upper pillar above the rope attachment position, The upper pillar is lifted up to above the lower pillar by the rope, The locking portion is locked to the rope, The upper pillar is lowered while adjusting the position of the upper pillar by the handle portion, and the upper pillar and the lower pillar are joined together. A method for assembling split columns.

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