JP2017053197A - Binding tool and binding method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a binding tool that enables efficient execution of binding work.SOLUTION: A binding tool 1 is formed of a slender band-shaped binding tool body 3, and hook parts 5 that are integrally formed at both longitudinal ends of the binding tool body 3. An engagement hole 7 is formed in the hook part 5. An outer periphery of the engagement hole 7 is pre-provided with a narrow cutting-planned part 9. A hacker is rotated by being inserted into the engagement holes 7 of both the hook parts 5, and both ends of the binding tool 1 are twisted together. The cutting-planned part 9 is pre-formed to be the first to be cut by rotation of the hacker.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a technique for binding reinforcing bars used in a reinforced concrete structure.

  Since concrete is strong in compression but weak in tension, concrete structures are embedded with reinforcing bars such as deformed steel bars to reinforce the low tensile strength of concrete. For example, the reinforcing bars are arranged in a mesh pattern at a concrete placement place before placing concrete, and the intersections of the plurality of reinforcing bars are bound by a binding tool.

  As a binding tool for binding reinforcing bars, for example, as shown in Patent Document 1, an elongated U-shaped member in which a wire is bent in a double shape and a loop is formed at one end is used.

  With reference to FIG. 8 thru | or FIG. 13, an example of the binding method which binds the crossing part of a reinforcing bar using such a binding tool is demonstrated.

  First, the binding tool A is arranged so as to be wound around the intersection of the two reinforcing bars B (FIG. 8). Here, the binding tool A is disposed below the intersection, and both ends of the binding tool A are positioned on the upper side. Next, the tip of the hacker D is inserted shallowly into the loop C of the binding tool A (FIG. 9), and the open side E of the binding tool A is hooked on the upper side of the tip of the hacker D (FIG. 10). Hacker D is rotated so that side E twists together (FIG. 11). When the binding tool A is sufficiently twisted and the crossing point of the reinforcing bar B is tightened tightly, the hacker D stops rotating before the binding tool A is cut (FIG. 12), and the tip of the hacker D is removed from the binding tool A. Thus, the bundling work is completed (FIG. 13).

Utility Model Registration No. 3038347

  Multiple or many rebars are bundled and assembled through such a bundling work, but if the open side comes off the finger when twisting the open side and the loop side of the bundling tool, the bundling work is started again from the beginning. There must be. Also, when rotating the hacker and tightening the binding tool, if the hacker stops rotating too early, the rebar tightening by the binding tool will be insufficient, and if the hacker is rotated too much, the part where the binding tool is twisted together Is cut and the binding strength cannot be maintained or the binding cannot be performed, but it is difficult to grasp the timing at which the hacker stops rotating. Therefore, it is difficult to efficiently perform the binding work with the conventional binding tool.

  Then, this invention aims at provision of the binding tool which can perform a binding work efficiently, and an efficient binding method.

  In order to achieve this object, a binding tool of the present invention is a reinforcing bar binding tool used for a reinforced concrete structure, which is a band-like elongated (band-shaped) metal binding tool body, and the length of the binding tool body. A hook part integrally formed at both ends in the direction (a hook part for hooking the tip of the hacker), and an engagement hole into which the hacker is inserted is formed in the hook part. A portion to be cut is formed on the outer periphery of the joint hole. The planned cutting portion can be a narrow portion formed on the outer periphery of the engagement hole. The narrow portion can be formed by shifting the center of the engagement hole with respect to the center of the hook portion. The hook portion and the engagement hole can be formed in a circular shape or a substantially circular shape. The planned cutting portion can be formed at the outer end portion or the outer end in the length direction of the hook portion. If formed in this way, the cutting occurs at both ends in the lengthwise direction of the binding tool, so there is no possibility that the strength of the portion twisted by the cutting will be weakened. Further, the planned cutting portion can be formed at the end in the width direction or the end in the width direction of the hook portion. The planned cutting portion can be, for example, a V-shaped cut formed from the outer periphery of the hook portion. For example, the scheduled cutting portion is a portion that is first cut when performing a twisting operation.

  The binding method of the present invention for achieving this object is a method of binding reinforcing bars used in a reinforced concrete structure, which is a strip-like elongated (band-shaped) metal binding tool body, and the binding tool body. A binding unit having a hook part integrally formed at both ends in the length direction (a hook part for hooking the tip of the hacker), and an engagement hole into which the hacker is inserted is formed in the hook part In the engagement step of both the preparation step of preparing the tool, the placement step of winding the binding tool body of the prepared binding tool around the reinforcing bar intersection, and the binding hole of the binding tool arranged at the reinforcing bar intersection An insertion step of inserting the tip of the hacker, a twisting step of rotating the hacker to twist both ends of the binding tool body and the hook, and the hacker until the outer periphery of the engagement hole is cut. Rotated A cutting step that is those with. Since the outer periphery of the engagement hole is cut, it is possible to suppress the strength of the twisted portion from being reduced. The cutting step is performed, for example, so as to cut a planned cutting portion formed on the outer periphery of the engagement hole. The planned cutting portion can be formed at the outer end portion or the outer end in the length direction of the hook portion.

  ADVANTAGE OF THE INVENTION According to this invention, the binding tool and the binding method which can bind a reinforcing bar simply and efficiently can be provided. Moreover, since the binding tool main body is formed in the elongate strip | belt shaped body, it is hard to shift | deviate at the time of binding.

It is a front view which shows the binding tool which concerns on this invention. It is a perspective view which shows the binding tool which concerns on this invention. It is a figure explaining the method to bind a reinforcing bar using a binding tool, and is a figure which shows an arrangement | positioning process. It is a figure explaining the method of binding a reinforcing bar using a binding tool, and is a figure which shows an insertion process. It is a figure explaining the method of binding a reinforcing bar using a binding tool, and is a figure which shows a twist process. It is a figure explaining the method of binding a reinforcing bar using a binding tool, and is a figure which shows a cutting process. It is a figure which shows the cutting plan part of another structure. It is a figure explaining the method of binding a reinforcing bar using the conventional binding tool, and is a figure which shows the arrangement | positioning state of a binding tool. It is a figure explaining the method of binding a reinforcing bar using the conventional binding tool, and is a figure which shows the insertion state of the hacker in the loop of a binding tool. It is a figure explaining the method of binding a reinforcing bar using the conventional binding tool, and is a figure which shows the case where the open side of a binding tool is hooked on the front-end | tip part of a hacker. It is a figure explaining the method of binding a reinforcing bar using the conventional binding tool, and is a figure which shows the rotation start state of a hacker. It is a figure explaining the method of binding a reinforcing bar using the conventional binding tool, and is a figure which shows the state which tightening of the binding tool was completed. It is a figure which shows the binding state by the conventional binding tool.

  Embodiments of the present invention will be described below with reference to the drawings.

  First, with reference to FIG.1 and FIG.2, the structure of the binding tool which concerns on this invention is demonstrated.

  The binding tool 1 includes a thin, elongated band-shaped or band-shaped binding tool body 3 and circular or substantially circular hooks 5 integrally formed at both ends in the length direction of the main body 3. The diameter of the hanging portion 5 is formed larger than the width of the main body 3. Here, for example, the total length of the binding tool 1 can be 150 mm, the width of the binding tool main body 3 can be 5 mm, and the outer diameter of the hook portion 5 can be 6.2 mm. An engagement hole 7 is formed in the center of the hook portion 5. The engagement hole 7 is formed so that the center O is located outside the center O ′ of the hook portion 5, and the width of the outer end portion or the outer end in the length direction of the hook portion 5 is narrow ( The narrow portion) is formed as a planned cutting portion 9 that is easily cut. The scheduled cutting part 9 is formed so as to be cut first when performing a twisting operation. The binding tool 1 can be made of metal, more specifically, iron, and is integrally formed by press molding, for example.

  Next, with reference to FIG. 3 thru | or FIG. 6, the case where a reinforcing bar is bound using the binding tool 1 is demonstrated.

  First, the main body 3 of the binding tool 1 is arranged so as to be wound around the intersection of the reinforcing bars B (FIG. 3). Specifically, the binding tool 1 is disposed below the intersection, and the binding tool 1 is bent so that both hooks 3 are positioned on the upper side. Next, the tip of a hacker D (which twists and fastens the binding tool 1 by rotation) is inserted into the engagement holes 7 of both hooks 5 of the binding tool 1 (FIG. 4). Then, the hacker D is rotated to twist the end portions of the main body 3 and the hook portions 3 together (FIG. 5). The hacker D is rotated until the planned cutting portions 9 of both hooks 5 are cut. Then, the hacker D is removed from the binding tool 1 to finish the binding work (FIG. 5). In addition, you may form the cutting scheduled part 9 in the side of the hook part 5, as shown to Fig.7 (a). Further, the cutting scheduled portion 9 may be formed by making a V-shaped cut 11 on the outer periphery of the hook portion 5. Here, the engagement hole 7 can be formed concentrically with the hook portion 5.

  The binding tool and the binding method of the present invention can be used in construction work.

DESCRIPTION OF SYMBOLS 1 Bundling tool 3 Bundling tool main body 5 Hook part 7 Engagement hole 9 Cut scheduled part D Hacker

Claims (5)

Reinforcing bar binding tool used for reinforced concrete structure,
A band-shaped elongated metal binding tool body;
A hook part integrally formed at both ends in the length direction of the binding tool body,
An engagement hole into which a hacker is inserted is formed in the hook portion, and a cutting scheduled portion is formed on the outer periphery of the engagement hole.   The binding tool according to claim 1, wherein the scheduled cutting portion is a narrow portion formed on an outer periphery of the engagement hole.   The binding device according to claim 2, wherein the narrow portion is formed by shifting a center of the engagement hole with respect to a center of the hook portion. A method for binding reinforcing bars used in a reinforced concrete structure,
A band-like elongated metal binding tool body and a hook part integrally formed at both ends in the length direction of the binding tool body, and an engagement hole for inserting a hacker is formed in the hook part. A preparation process for preparing a binding tool,
An arrangement step of arranging the binding tool main body of the prepared binding tool so as to be wound around a crossing point of a reinforcing bar,
An insertion step of inserting a tip of a hacker into both engagement holes of the binding tool arranged at the intersection of the reinforcing bars;
A twisting process in which the hacker is rotated to twist both ends of the binding tool body and the hook part; and
And a cutting step of rotating the hacker until the outer periphery of the engagement hole is cut.   The binding method according to claim 4, wherein the cutting step is performed so as to cut a scheduled cutting portion formed on an outer periphery of the engagement hole.

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