Screw-jointed rebar sling

Abstract

To provide a screw-knotted rebar hanger that can stably fix a screw-knotted rebar and withstand repeated use over a long period of time.SOLUTION: A screw-knotted rebar hanger comprises a hanger main body 2, an eye bolt 3, a fastener 6, and a wire member 7. The eyebolt 3 is fixed to the upper end of the hanger main body 2 as a hanger. The eyebolt 3 can rotate around the longitudinal direction of the hanger main body 2. It can rotate a U-shaped hanging portion up and down within a range of ±90°, as well as a wide range of hanging devices, not limited to the eyebolt of such construction. An opening is provided on the lower part of the metallic hanger main body 2, and a female screw part 4 is formed. Further, a through hole 5 is formed on the upper part of the hanger main body 2. The metal fastener 6 has a tip portion 6a inserted into the through hole 5 to prevent rotation of the screw-knotted rebar. The fastener 6 is connected to the hanger main body 2 using the wire member 7.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a hoisting device used when vertically arranging threaded reinforcing bars in a threaded reinforcing bar arrangement work. [Background technology]

[0002] In rebar placement work, long rebars are sometimes placed vertically. In order to make the rebars that are laid out horizontally stand upright, it is necessary to lift one end of the rebar using a crane or similar device. If the rebar falls off the crane while being lifted, it could cause a serious accident, so metal fittings with a hanging device for lifting the rebar are required.

[0003] Therefore, a threaded rebar hook that is attached to a portion of a rebar is known (see Patent Document 1). The threaded rebar hook of Patent Document 1 prevents the threaded rebar from falling off by threading a hook bolt through the side of a U-shaped main body. However, the threaded rebar hook of Patent Document 1 threads a hook bolt through the side of the threaded rebar and fixes the rebar by bringing the tip of the hook bolt into contact with the flat part of the rebar, which places stress on the rebar and makes the hook bolt prone to breakage after repeated use over a long period of time. Another problem is that the threaded rebar is fixed at the tip of the hook bolt, i.e., at a point, making it difficult to stably fix the rebar. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Jitszen Showa 60-1846 Publication Summary of the Invention [Problem to be solved by the invention]

[0005] In view of the above circumstances, the present invention aims to provide a screw-knotted reinforcing bar suspender that can stably fix a screw-knotted reinforcing bar and can withstand repeated use over a long period of time. [Means for solving the problem]

[0006] In order to solve the above problems, the threaded rebar hanger of the present invention comprises a hanger body having a hexagonal nut-shaped upper end with a hanging device and a through hole and a female screw portion provided inside from the lower end, and a fastener that is inserted into the through hole, and the through hole is characterized in that a portion of the thread of the female screw portion is cut out from the upper end of the hanger body approximately parallel to the axial direction of the female screw portion, and the fastener is inserted into the through hole from the upper end, thereby preventing rotation of the threaded rebar that is screwed into the female screw portion. This configuration can prevent the threaded reinforcing bar from falling off from the sling body. By providing the through-hole, the gap caused by the flat portion of the known threaded rebar can be filled with a fastener, preventing the threaded rebar or the sling body from rotating unexpectedly. Also, by cutting out a part of the thread of the female screw portion approximately parallel to the axial direction of the female screw portion and attaching a fastener to the through-hole, the flat portion of the threaded rebar can be supported by a line rather than a point, allowing for more stable fixation. The diameter of the hanging threaded rebar can be adapted to a wide range of known sizes, and can be designed to fit diameters such as D29, D32, D35, D38, D41, and D51.

[0007] In the threaded rebar sling device of the present invention, it is preferable that the fastener is fitted or screwed into the through hole. By fitting the fastener into the through hole, it becomes easy to attach and detach the fastener. Furthermore, by screwing the fastener into the through hole, it can be stably fixed without using any other members.

[0008] In the threaded rebar sling of the present invention, it is preferable that the fastener is connected to one end of a wire portion having deformability or shape memory, and the other end of the wire portion is connected to the sling body. By connecting by the wire portion, when the fastener is inserted into the through hole, by deforming the wire portion into a desired shape, the fastener can be easily prevented from falling out of the through hole.

[0009] In the threaded rebar hanger of the present invention, the diameter of the through hole is preferably approximately equal to the height of the thread. By making the diameter of the through hole and the height of the thread approximately equal, when the fastener is inserted into the through hole, the fastener is less likely to interfere with the flat part of the threaded rebar. This makes it easy to attach and detach the fastener, and even when the fastener is fixed, stress is not applied to the threaded rebar, preventing damage to the threaded rebar and the fastener.

[0010] The threaded rebar sling of the present invention may be such that a plurality of the threaded rebar slings described above are attached to a horizontal rod at predetermined intervals, thereby enabling a large number of threaded rebars to be stably fixed with a relatively simple structure and then hung by a crane or the like. [Effects of the Invention]

[0011] The screw-knotted reinforcing bar sling of the present invention has the effect of being able to stably fix the screw-knotted reinforcing bar and being able to withstand repeated use over a long period of time. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a perspective view of the appearance of the screw-jointed rebar sling of Example 1. [Figure 2] Installation flow diagram of screw-type rebar slinger of Example 1 [Figure 3] Image of installation of screw-type rebar sling in Example 1 (1) [Figure 4] Image of fastener and threaded rebar engagement [Figure 5] Plan view of the appearance of the screw-type rebar sling of Example 1 [Figure 6] Image of installation of screw-type rebar sling in Example 1 (2) [Figure 7] Image of the screw-jointed rebar sling in use in Example 1 [Figure 8] FIG. 10 is a perspective view of the appearance of the screw-type rebar sling of Example 2. [Figure 9] FIG. 10 is a perspective view of the appearance of the screw-type rebar sling of Example 3. DETAILED DESCRIPTION OF THE INVENTION

[0013] An example of an embodiment of the present invention will be described in detail below with reference to the drawings. Note that the scope of the present invention is not limited to the following examples and illustrated examples, and many modifications and variations are possible. [Example]

[0014] 1 shows an external perspective view of the threaded reinforcing bar slinger of Example 1. As shown in FIG. 1, the threaded reinforcing bar slinger 1 is composed of a slinger body 2, an eyebolt 3, a fastener 6, and a wire member 7. The eyebolt 3 is fixed to the upper end of the sling body 2 as a hanging device. The eyebolt 3 can rotate around its axis along the longitudinal direction of the sling body 2. The U-shaped hook portion can also be rotated up and down within a range of ±90°. However, this is not limited to eyebolts with such a structure, and a wide range of hanging devices can be used. The metal sling body 2 has an opening at its bottom, with a female thread portion 4 formed therein. The diameter of the female thread portion 4 can be a wide range of known sizes, such as D29, D32, D35, D38, D41, and D51. The sling body 2 also has a through-hole 5 formed at its top. The metal fastener 6 has its tip 6a inserted into the through-hole 5 to prevent the threaded rebar from rotating. The fastener 6 is connected to the sling body 2 using a wire member 7.

[0015] Here, the procedure for attaching the threaded rebar sling 1 to the threaded rebar will be described. Fig. 2 shows an attachment flow diagram for the threaded rebar sling of Example 1. Fig. 3 shows an image of the attachment of the threaded rebar sling of Example 1. As shown in Fig. 3, first, the sling body 2 and the threaded rebar 8 are screwed together using the female screw portion 4 provided on the sling body 2 and the male screw portion 8a provided on the threaded rebar 8 (step S01).

[0016] Fig. 4 shows an image of the engagement between the fastener and the threaded rebar, and Fig. 5 shows a plan view of the appearance of the threaded rebar suspender of Example 1. As shown in FIG. 4, the threaded rebar 8 has a male thread portion 8a formed around its periphery, and a portion of the male thread portion 8a is a flat portion 8b. As shown in FIG. 5, the back side of the flat portion 8b shown in FIG. 4 also has a flat portion 8b. The diameter φ of the through hole 5 and the height H of the thread 4a are approximately equal and are smaller than the thickness D of the gap 8c formed by the flat portion 8b. By inserting a fastener 6 into this gap 8c, the threaded rebar 8 is prevented from rotating. Therefore, even when the fastener 6 is inserted into the through hole 5, stress is not applied from the fastener 6 to the threaded rebar 8, preventing damage to the threaded rebar 8 or the fastener 6. When attaching the threaded rebar sling 1 to the threaded rebar 8, the sling body 2 and the threaded rebar 8 are screwed together, and then adjustments are made so that the gap 8c formed by the flat portion 8b and the position of the through-hole 5 overlap (Step S02). The adjustment may be made by visually comparing the upper and lower ends of the sling body 2, or by actually inserting the tip of the fastener 6.

[0017] Figure 6 shows an image of the installation of the threaded rebar hanger of Example 1. With the gap 8c shown in Figure 5 and the through hole 5 positioned to overlap, fastener 6 is inserted as shown in Figure 6 to secure the threaded rebar hanger 1 and the threaded rebar 8 (step S03). The through hole 5 is provided approximately parallel to the axial direction of the female thread portion 4, and by attaching fastener 6 to this through hole 5, the threaded rebar 8 can be supported by a line rather than a point, allowing for more stable fixation. Furthermore, wire member 7 is deformed and fixed by being wound around suspender body 2, reinforcing the fixed state of fastener 6 (Step S04). Wire member 7 is made of a metal wire material that is deformable and has shape memory properties.

[0018] Figure 7 shows an image of how the threaded rebar sling device of Example 1 is used. Even if the threaded rebar 8 to which the threaded rebar sling device 1 is attached is tilted as shown in Figure 7, the fastener 6 is not easily removed from the sling device main body 2 because the fixed state of the fastener 6 is reinforced by the wire member 7. [Example]

[0019] Figure 8 shows an external perspective view of the threaded rebar sling device of Example 2. As shown in Figure 8, the threaded rebar sling device 10 is composed of a sling device main body 20, an eyebolt 3, and a fastener 60. As with the threaded rebar sling device 1 of Example 2, the eyebolt 3 is fixed to the upper end of the sling device main body 20. An opening is provided at the bottom of the sling device main body 20, and a female screw portion 4 is formed therein. Furthermore, a through hole 50 is formed in the upper part of the suspender body 20, but unlike the through hole 5 of Example 1, a female screw portion is provided inside. Corresponding to the shape of the female screw portion, fastener 60 is a screw member provided with a male screw portion. Therefore, when attaching the threaded rebar hanger 10 of Example 2 to the threaded rebar 8, the fastener 60 is fixed by screwing it into the through hole 50. This makes it possible to stably fix the fastener 60 without using the wire member 7. [Example]

[0020] FIG. 9 shows an external perspective view of the screw-knotted rebar sling device of Example 3. As shown in FIG. 9, the screw-knotted rebar sling device 11 is composed of screw-knotted rebar sling devices (1a to 1f), a horizontal rod 9, and wires (12a, 12b). Each of the screw-knotted rebar sling devices (1a to 1f) has the same structure as the screw-knotted rebar sling device 1 of Example 1, and an eyebolt 3 is hung on the horizontal rod 9. Wires (12a, 12b) are attached to both ends of the horizontal rod 9, and a total of six screw-knotted rebars 8 can be suspended by lifting the wires (12a, 12b) using a crane or the like (not shown). Although not shown here, the wires (12a, 12b) are designed to be easily attached and detached from the horizontal rod 9.

[0021] When attaching the threaded reinforcing bar hanger 11 to the threaded reinforcing bar 8, first, the threaded reinforcing bar hangers (1a to 1f) are attached to the threaded reinforcing bar 8 using the same procedure as in the first embodiment. The wire 12a or wire 12b is removed in advance from the horizontal rod 9, and the threaded rebar hangers (1a to 1f) are attached by hanging eyebolts 3 from the ends of the horizontal rod 9. The horizontal rod 9 may be provided with protrusions or recesses at predetermined intervals so that the intervals between the threaded rebar hangers (1a to 1f) are approximately uniform. After the screw-jointed rebar hoisting devices (1a to 1f) are attached to the horizontal rod 9, the wire 12a or wire 12b that was previously removed is attached to the end of the horizontal rod 9, and the wire (12a, 12b) is lifted up by a crane or the like. By using the threaded reinforcing bar suspender 11 of the third embodiment, a large number of threaded reinforcing bars can be stably fixed with a relatively simple structure. [Industrial Applicability]

[0022] The present invention is useful as a suspender for threaded reinforcing bars in reinforcement work. [Explanation of symbols]

[0023] 1, 1a~1f, 10, 11 Screw-jointed rebar sling 2,20 Lifting device body 3 eyebolts 4 Female thread part 4a screw thread 5,50 through holes 6,60 Fasteners 7 Wire parts 8 Threaded rebar 8a Male thread part 8b Flat part 8c gap 9 horizontal bar 12a, 12b wire D Thickness H Height φ diameter

Claims

1. The suspender body has a hexagonal nut-shaped upper end provided with a hanger and a through hole, and a female screw portion provided inside from the lower end, and a fastener inserted into the through hole, The through hole is formed by cutting out a part of the thread of the female screw portion from the upper end of the suspender body in a direction substantially parallel to the axial direction of the female screw portion, A threaded rebar hanger characterized in that the fastener is inserted into the through hole from the top end, thereby preventing rotation of the threaded rebar screwed into the female screw portion.

2. The threaded rebar hanger according to claim 1, wherein the fastener is fitted or screwed into the through hole.

3. A threaded rebar sling device as described in claim 1 or 2, characterized in that the fastener is connected to one end of a wire portion that is deformable or shape-memory, and the other end of the wire portion is connected to the sling device main body.

4. 4. A threaded rebar suspender according to claim 1, wherein the diameter of the through hole is approximately equal to the height of the screw thread.

5. A threaded reinforcing bar sling comprising a plurality of threaded reinforcing bar slings according to any one of claims 1 to 4, attached to a horizontal rod in a line at predetermined intervals.

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